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f25d0cf3 | 1 | /* |
d3cb080e | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc. |
f25d0cf3 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
d787ad39 JS |
18 | #include <netinet/in.h> |
19 | ||
f25d0cf3 | 20 | #include "ofp-actions.h" |
f25d0cf3 BP |
21 | #include "bundle.h" |
22 | #include "byte-order.h" | |
23 | #include "compiler.h" | |
d4abaff5 | 24 | #include "dummy.h" |
f25d0cf3 | 25 | #include "dynamic-string.h" |
c2d936a4 | 26 | #include "hmap.h" |
f25d0cf3 BP |
27 | #include "learn.h" |
28 | #include "meta-flow.h" | |
29 | #include "multipath.h" | |
30 | #include "nx-match.h" | |
9ac0aada | 31 | #include "odp-netlink.h" |
c2d936a4 | 32 | #include "ofp-parse.h" |
f25d0cf3 BP |
33 | #include "ofp-util.h" |
34 | #include "ofpbuf.h" | |
c2d936a4 | 35 | #include "unaligned.h" |
cb22974d | 36 | #include "util.h" |
e6211adc | 37 | #include "openvswitch/vlog.h" |
f25d0cf3 BP |
38 | |
39 | VLOG_DEFINE_THIS_MODULE(ofp_actions); | |
40 | ||
41 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
f25d0cf3 | 42 | |
c2d936a4 BP |
43 | struct ofp_action_header; |
44 | ||
45 | /* Raw identifiers for OpenFlow actions. | |
46 | * | |
47 | * Decoding and encoding OpenFlow actions across multiple versions is difficult | |
48 | * to do in a clean, consistent way. This enumeration lays out all of the | |
49 | * forms of actions that Open vSwitch supports. | |
50 | * | |
51 | * The comments here must follow a stylized form because the | |
52 | * "extract-ofp-actions" program parses them at build time to generate data | |
53 | * tables. | |
54 | * | |
55 | * - The first part of each comment specifies the vendor, OpenFlow versions, | |
56 | * and type for each protocol that supports the action: | |
57 | * | |
58 | * # The vendor is OF for standard OpenFlow actions, NX for Nicira | |
59 | * extension actions. (Support for other vendors can be added, but | |
60 | * it can't be done just based on a vendor ID definition alone | |
61 | * because OpenFlow doesn't define a standard way to specify a | |
62 | * subtype for vendor actions, so other vendors might do it different | |
63 | * from Nicira.) | |
64 | * | |
65 | * # The version can specify a specific OpenFlow version, a version | |
66 | * range delimited by "-", or an open-ended range with "+". | |
67 | * | |
68 | * # The type, in parentheses, is the action type number (for standard | |
69 | * OpenFlow actions) or subtype (for vendor extension actions). | |
70 | * | |
71 | * # Optionally one may add "is deprecated" followed by a | |
72 | * human-readable reason in parentheses (which will be used in log | |
73 | * messages), if a particular action should no longer be used. | |
74 | * | |
75 | * Multiple such specifications may be separated by commas. | |
76 | * | |
77 | * - The second part describes the action's wire format. It may be: | |
78 | * | |
79 | * # "struct <name>": The struct fully specifies the wire format. The | |
80 | * action is exactly the size of the struct. (Thus, the struct must | |
81 | * be an exact multiple of 8 bytes in size.) | |
82 | * | |
83 | * # "struct <name>, ...": The struct specifies the beginning of the | |
84 | * wire format. An instance of the action is either the struct's | |
85 | * exact size, or a multiple of 8 bytes longer. | |
86 | * | |
87 | * # "uint<N>_t" or "ovs_be<N>": The action consists of a (standard or | |
88 | * vendor extension) header, followed by 0 or more pad bytes to align | |
89 | * to a multiple of <N> bits, followed by an argument of the given | |
90 | * type, followed by 0 or more pad bytes to bring the total action up | |
91 | * to a multiple of 8 bytes. | |
92 | * | |
93 | * # "void": The action is just a (standard or vendor extension) | |
94 | * header. | |
95 | * | |
96 | * - Optional additional text enclosed in square brackets is commentary for | |
97 | * the human reader. | |
98 | */ | |
99 | enum ofp_raw_action_type { | |
100 | /* ## ----------------- ## */ | |
101 | /* ## Standard actions. ## */ | |
102 | /* ## ----------------- ## */ | |
103 | ||
104 | /* OF1.0(0): struct ofp10_action_output. */ | |
105 | OFPAT_RAW10_OUTPUT, | |
106 | /* OF1.1+(0): struct ofp11_action_output. */ | |
107 | OFPAT_RAW11_OUTPUT, | |
108 | ||
109 | /* OF1.0(1): uint16_t. */ | |
110 | OFPAT_RAW10_SET_VLAN_VID, | |
111 | /* OF1.0(2): uint8_t. */ | |
112 | OFPAT_RAW10_SET_VLAN_PCP, | |
113 | ||
114 | /* OF1.1(1), OF1.2+(1) is deprecated (use Set-Field): uint16_t. | |
115 | * | |
116 | * [Semantics differ slightly between the 1.0 and 1.1 versions of the VLAN | |
117 | * modification actions: the 1.0 versions push a VLAN header if none is | |
118 | * present, but the 1.1 versions do not. That is the only reason that we | |
119 | * distinguish their raw action types.] */ | |
120 | OFPAT_RAW11_SET_VLAN_VID, | |
121 | /* OF1.1(2), OF1.2+(2) is deprecated (use Set-Field): uint8_t. */ | |
122 | OFPAT_RAW11_SET_VLAN_PCP, | |
123 | ||
124 | /* OF1.1+(17): ovs_be16. | |
125 | * | |
126 | * [The argument is the Ethertype, e.g. ETH_TYPE_VLAN_8021Q, not the VID or | |
127 | * TCI.] */ | |
128 | OFPAT_RAW11_PUSH_VLAN, | |
129 | ||
130 | /* OF1.0(3): void. */ | |
131 | OFPAT_RAW10_STRIP_VLAN, | |
132 | /* OF1.1+(18): void. */ | |
133 | OFPAT_RAW11_POP_VLAN, | |
134 | ||
135 | /* OF1.0(4), OF1.1(3), OF1.2+(3) is deprecated (use Set-Field): struct | |
136 | * ofp_action_dl_addr. */ | |
137 | OFPAT_RAW_SET_DL_SRC, | |
138 | ||
139 | /* OF1.0(5), OF1.1(4), OF1.2+(4) is deprecated (use Set-Field): struct | |
140 | * ofp_action_dl_addr. */ | |
141 | OFPAT_RAW_SET_DL_DST, | |
142 | ||
143 | /* OF1.0(6), OF1.1(5), OF1.2+(5) is deprecated (use Set-Field): | |
144 | * ovs_be32. */ | |
145 | OFPAT_RAW_SET_NW_SRC, | |
146 | ||
147 | /* OF1.0(7), OF1.1(6), OF1.2+(6) is deprecated (use Set-Field): | |
148 | * ovs_be32. */ | |
149 | OFPAT_RAW_SET_NW_DST, | |
150 | ||
151 | /* OF1.0(8), OF1.1(7), OF1.2+(7) is deprecated (use Set-Field): uint8_t. */ | |
152 | OFPAT_RAW_SET_NW_TOS, | |
153 | ||
154 | /* OF1.1(8), OF1.2+(8) is deprecated (use Set-Field): uint8_t. */ | |
155 | OFPAT_RAW11_SET_NW_ECN, | |
156 | ||
157 | /* OF1.0(9), OF1.1(9), OF1.2+(9) is deprecated (use Set-Field): | |
158 | * ovs_be16. */ | |
159 | OFPAT_RAW_SET_TP_SRC, | |
160 | ||
161 | /* OF1.0(10), OF1.1(10), OF1.2+(10) is deprecated (use Set-Field): | |
162 | * ovs_be16. */ | |
163 | OFPAT_RAW_SET_TP_DST, | |
164 | ||
165 | /* OF1.0(11): struct ofp10_action_enqueue. */ | |
166 | OFPAT_RAW10_ENQUEUE, | |
167 | ||
168 | /* NX1.0(30), OF1.1(13), OF1.2+(13) is deprecated (use Set-Field): | |
169 | * ovs_be32. */ | |
170 | OFPAT_RAW_SET_MPLS_LABEL, | |
171 | ||
172 | /* NX1.0(31), OF1.1(14), OF1.2+(14) is deprecated (use Set-Field): | |
173 | * uint8_t. */ | |
174 | OFPAT_RAW_SET_MPLS_TC, | |
175 | ||
176 | /* NX1.0(25), OF1.1(15), OF1.2+(15) is deprecated (use Set-Field): | |
177 | * uint8_t. */ | |
178 | OFPAT_RAW_SET_MPLS_TTL, | |
179 | ||
180 | /* NX1.0(26), OF1.1+(16): void. */ | |
181 | OFPAT_RAW_DEC_MPLS_TTL, | |
182 | ||
183 | /* NX1.0(23), OF1.1+(19): ovs_be16. | |
184 | * | |
185 | * [The argument is the Ethertype, e.g. ETH_TYPE_MPLS, not the label.] */ | |
186 | OFPAT_RAW_PUSH_MPLS, | |
187 | ||
188 | /* NX1.0(24), OF1.1+(20): ovs_be16. | |
189 | * | |
190 | * [The argument is the Ethertype, e.g. ETH_TYPE_IPV4 if at BoS or | |
191 | * ETH_TYPE_MPLS otherwise, not the label.] */ | |
192 | OFPAT_RAW_POP_MPLS, | |
193 | ||
194 | /* NX1.0(4), OF1.1+(21): uint32_t. */ | |
195 | OFPAT_RAW_SET_QUEUE, | |
196 | ||
197 | /* OF1.1+(22): uint32_t. */ | |
198 | OFPAT_RAW11_GROUP, | |
199 | ||
200 | /* OF1.1+(23): uint8_t. */ | |
201 | OFPAT_RAW11_SET_NW_TTL, | |
202 | ||
203 | /* NX1.0(18), OF1.1+(24): void. */ | |
204 | OFPAT_RAW_DEC_NW_TTL, | |
205 | /* NX1.0+(21): struct nx_action_cnt_ids, ... */ | |
206 | NXAST_RAW_DEC_TTL_CNT_IDS, | |
207 | ||
7eb4b1f1 | 208 | /* OF1.2-1.4(25): struct ofp12_action_set_field, ... */ |
c2d936a4 | 209 | OFPAT_RAW12_SET_FIELD, |
7eb4b1f1 BP |
210 | /* OF1.5+(25): struct ofp12_action_set_field, ... */ |
211 | OFPAT_RAW15_SET_FIELD, | |
212 | /* NX1.0-1.4(7): struct nx_action_reg_load. | |
213 | * | |
214 | * [In OpenFlow 1.5, set_field is a superset of reg_load functionality, so | |
215 | * we drop reg_load.] */ | |
c2d936a4 | 216 | NXAST_RAW_REG_LOAD, |
bad8a439 BP |
217 | /* NX1.0-1.4(33): struct nx_action_reg_load2, ... |
218 | * | |
219 | * [In OpenFlow 1.5, set_field is a superset of reg_load2 functionality, so | |
220 | * we drop reg_load2.] */ | |
221 | NXAST_RAW_REG_LOAD2, | |
c2d936a4 | 222 | |
f13cdd73 | 223 | /* OF1.5+(28): struct ofp15_action_copy_field, ... */ |
73178f20 | 224 | OFPAT_RAW15_COPY_FIELD, |
914624f8 BP |
225 | /* ONF1.3-1.4(3200): struct onf_action_copy_field, ... */ |
226 | ONFACT_RAW13_COPY_FIELD, | |
bad8a439 | 227 | /* NX1.0-1.4(6): struct nx_action_reg_move, ... */ |
73178f20 BP |
228 | NXAST_RAW_REG_MOVE, |
229 | ||
c2d936a4 BP |
230 | /* ## ------------------------- ## */ |
231 | /* ## Nicira extension actions. ## */ | |
232 | /* ## ------------------------- ## */ | |
233 | ||
234 | /* Actions similar to standard actions are listed with the standard actions. */ | |
235 | ||
236 | /* NX1.0+(1): uint16_t. */ | |
237 | NXAST_RAW_RESUBMIT, | |
238 | /* NX1.0+(14): struct nx_action_resubmit. */ | |
239 | NXAST_RAW_RESUBMIT_TABLE, | |
240 | ||
241 | /* NX1.0+(2): uint32_t. */ | |
242 | NXAST_RAW_SET_TUNNEL, | |
243 | /* NX1.0+(9): uint64_t. */ | |
244 | NXAST_RAW_SET_TUNNEL64, | |
245 | ||
246 | /* NX1.0+(5): void. */ | |
247 | NXAST_RAW_POP_QUEUE, | |
248 | ||
c2d936a4 BP |
249 | /* NX1.0+(8): struct nx_action_note, ... */ |
250 | NXAST_RAW_NOTE, | |
251 | ||
252 | /* NX1.0+(10): struct nx_action_multipath. */ | |
253 | NXAST_RAW_MULTIPATH, | |
254 | ||
255 | /* NX1.0+(12): struct nx_action_bundle, ... */ | |
256 | NXAST_RAW_BUNDLE, | |
257 | /* NX1.0+(13): struct nx_action_bundle, ... */ | |
258 | NXAST_RAW_BUNDLE_LOAD, | |
259 | ||
260 | /* NX1.0+(15): struct nx_action_output_reg. */ | |
261 | NXAST_RAW_OUTPUT_REG, | |
bad8a439 BP |
262 | /* NX1.0+(32): struct nx_action_output_reg2. */ |
263 | NXAST_RAW_OUTPUT_REG2, | |
c2d936a4 BP |
264 | |
265 | /* NX1.0+(16): struct nx_action_learn, ... */ | |
266 | NXAST_RAW_LEARN, | |
267 | ||
268 | /* NX1.0+(17): void. */ | |
269 | NXAST_RAW_EXIT, | |
270 | ||
271 | /* NX1.0+(19): struct nx_action_fin_timeout. */ | |
272 | NXAST_RAW_FIN_TIMEOUT, | |
273 | ||
274 | /* NX1.0+(20): struct nx_action_controller. */ | |
275 | NXAST_RAW_CONTROLLER, | |
276 | ||
277 | /* NX1.0+(22): struct nx_action_write_metadata. */ | |
278 | NXAST_RAW_WRITE_METADATA, | |
279 | ||
280 | /* NX1.0+(27): struct nx_action_stack. */ | |
281 | NXAST_RAW_STACK_PUSH, | |
282 | ||
283 | /* NX1.0+(28): struct nx_action_stack. */ | |
284 | NXAST_RAW_STACK_POP, | |
285 | ||
286 | /* NX1.0+(29): struct nx_action_sample. */ | |
287 | NXAST_RAW_SAMPLE, | |
18080541 BP |
288 | |
289 | /* NX1.0+(34): struct nx_action_conjunction. */ | |
290 | NXAST_RAW_CONJUNCTION, | |
d4abaff5 | 291 | |
07659514 JS |
292 | /* NX1.0+(35): struct nx_action_conntrack, ... */ |
293 | NXAST_RAW_CT, | |
294 | ||
9ac0aada JR |
295 | /* NX1.0+(36): struct nx_action_nat, ... */ |
296 | NXAST_RAW_NAT, | |
297 | ||
d4abaff5 BP |
298 | /* ## ------------------ ## */ |
299 | /* ## Debugging actions. ## */ | |
300 | /* ## ------------------ ## */ | |
301 | ||
302 | /* These are intentionally undocumented, subject to change, and ovs-vswitchd */ | |
303 | /* accepts them only if started with --enable-dummy. */ | |
304 | ||
305 | /* NX1.0+(255): void. */ | |
306 | NXAST_RAW_DEBUG_RECIRC, | |
c2d936a4 BP |
307 | }; |
308 | ||
309 | /* OpenFlow actions are always a multiple of 8 bytes in length. */ | |
310 | #define OFP_ACTION_ALIGN 8 | |
311 | ||
312 | /* Define a few functions for working with instructions. */ | |
313 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
314 | static inline const struct STRUCT * OVS_UNUSED \ | |
315 | instruction_get_##ENUM(const struct ofp11_instruction *inst)\ | |
316 | { \ | |
317 | ovs_assert(inst->type == htons(ENUM)); \ | |
318 | return ALIGNED_CAST(struct STRUCT *, inst); \ | |
319 | } \ | |
320 | \ | |
321 | static inline void OVS_UNUSED \ | |
322 | instruction_init_##ENUM(struct STRUCT *s) \ | |
323 | { \ | |
324 | memset(s, 0, sizeof *s); \ | |
325 | s->type = htons(ENUM); \ | |
326 | s->len = htons(sizeof *s); \ | |
327 | } \ | |
328 | \ | |
329 | static inline struct STRUCT * OVS_UNUSED \ | |
330 | instruction_put_##ENUM(struct ofpbuf *buf) \ | |
331 | { \ | |
332 | struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \ | |
333 | instruction_init_##ENUM(s); \ | |
334 | return s; \ | |
335 | } | |
336 | OVS_INSTRUCTIONS | |
337 | #undef DEFINE_INST | |
338 | ||
339 | static void ofpacts_update_instruction_actions(struct ofpbuf *openflow, | |
340 | size_t ofs); | |
178742f9 | 341 | static void pad_ofpat(struct ofpbuf *openflow, size_t start_ofs); |
c2d936a4 BP |
342 | |
343 | static enum ofperr ofpacts_verify(const struct ofpact[], size_t ofpacts_len, | |
d824b5b7 JS |
344 | uint32_t allowed_ovsinsts, |
345 | enum ofpact_type outer_action); | |
c2d936a4 BP |
346 | |
347 | static void ofpact_put_set_field(struct ofpbuf *openflow, enum ofp_version, | |
348 | enum mf_field_id, uint64_t value); | |
349 | ||
350 | static enum ofperr ofpact_pull_raw(struct ofpbuf *, enum ofp_version, | |
351 | enum ofp_raw_action_type *, uint64_t *arg); | |
352 | static void *ofpact_put_raw(struct ofpbuf *, enum ofp_version, | |
353 | enum ofp_raw_action_type, uint64_t arg); | |
354 | ||
cab50449 | 355 | static char *OVS_WARN_UNUSED_RESULT ofpacts_parse( |
c2d936a4 | 356 | char *str, struct ofpbuf *ofpacts, enum ofputil_protocol *usable_protocols, |
d824b5b7 | 357 | bool allow_instructions, enum ofpact_type outer_action); |
07659514 JS |
358 | static enum ofperr ofpacts_pull_openflow_actions__( |
359 | struct ofpbuf *openflow, unsigned int actions_len, | |
360 | enum ofp_version version, uint32_t allowed_ovsinsts, | |
361 | struct ofpbuf *ofpacts, enum ofpact_type outer_action); | |
8e53fe8c JS |
362 | static char * OVS_WARN_UNUSED_RESULT ofpacts_parse_copy( |
363 | const char *s_, struct ofpbuf *ofpacts, | |
364 | enum ofputil_protocol *usable_protocols, | |
365 | bool allow_instructions, enum ofpact_type outer_action); | |
d824b5b7 | 366 | |
4f20179d BP |
367 | /* Returns the ofpact following 'ofpact', except that if 'ofpact' contains |
368 | * nested ofpacts it returns the first one. */ | |
369 | struct ofpact * | |
370 | ofpact_next_flattened(const struct ofpact *ofpact) | |
371 | { | |
372 | switch (ofpact->type) { | |
373 | case OFPACT_OUTPUT: | |
374 | case OFPACT_GROUP: | |
375 | case OFPACT_CONTROLLER: | |
376 | case OFPACT_ENQUEUE: | |
377 | case OFPACT_OUTPUT_REG: | |
378 | case OFPACT_BUNDLE: | |
379 | case OFPACT_SET_FIELD: | |
380 | case OFPACT_SET_VLAN_VID: | |
381 | case OFPACT_SET_VLAN_PCP: | |
382 | case OFPACT_STRIP_VLAN: | |
383 | case OFPACT_PUSH_VLAN: | |
384 | case OFPACT_SET_ETH_SRC: | |
385 | case OFPACT_SET_ETH_DST: | |
386 | case OFPACT_SET_IPV4_SRC: | |
387 | case OFPACT_SET_IPV4_DST: | |
388 | case OFPACT_SET_IP_DSCP: | |
389 | case OFPACT_SET_IP_ECN: | |
390 | case OFPACT_SET_IP_TTL: | |
391 | case OFPACT_SET_L4_SRC_PORT: | |
392 | case OFPACT_SET_L4_DST_PORT: | |
393 | case OFPACT_REG_MOVE: | |
394 | case OFPACT_STACK_PUSH: | |
395 | case OFPACT_STACK_POP: | |
396 | case OFPACT_DEC_TTL: | |
397 | case OFPACT_SET_MPLS_LABEL: | |
398 | case OFPACT_SET_MPLS_TC: | |
399 | case OFPACT_SET_MPLS_TTL: | |
400 | case OFPACT_DEC_MPLS_TTL: | |
401 | case OFPACT_PUSH_MPLS: | |
402 | case OFPACT_POP_MPLS: | |
403 | case OFPACT_SET_TUNNEL: | |
404 | case OFPACT_SET_QUEUE: | |
405 | case OFPACT_POP_QUEUE: | |
406 | case OFPACT_FIN_TIMEOUT: | |
407 | case OFPACT_RESUBMIT: | |
408 | case OFPACT_LEARN: | |
409 | case OFPACT_CONJUNCTION: | |
410 | case OFPACT_MULTIPATH: | |
411 | case OFPACT_NOTE: | |
412 | case OFPACT_EXIT: | |
413 | case OFPACT_SAMPLE: | |
414 | case OFPACT_UNROLL_XLATE: | |
415 | case OFPACT_DEBUG_RECIRC: | |
416 | case OFPACT_METER: | |
417 | case OFPACT_CLEAR_ACTIONS: | |
418 | case OFPACT_WRITE_METADATA: | |
419 | case OFPACT_GOTO_TABLE: | |
420 | case OFPACT_NAT: | |
421 | return ofpact_next(ofpact); | |
422 | ||
423 | case OFPACT_CT: | |
424 | return ofpact_get_CT(ofpact)->actions; | |
425 | ||
426 | case OFPACT_WRITE_ACTIONS: | |
427 | return ofpact_get_WRITE_ACTIONS(ofpact)->actions; | |
428 | } | |
429 | ||
430 | OVS_NOT_REACHED(); | |
431 | } | |
432 | ||
d824b5b7 JS |
433 | /* Pull off existing actions or instructions. Used by nesting actions to keep |
434 | * ofpacts_parse() oblivious of actions nesting. | |
435 | * | |
436 | * Push the actions back on after nested parsing, e.g.: | |
437 | * | |
438 | * size_t ofs = ofpacts_pull(ofpacts); | |
439 | * ...nested parsing... | |
440 | * ofpbuf_push_uninit(ofpacts, ofs); | |
441 | */ | |
442 | static size_t | |
443 | ofpacts_pull(struct ofpbuf *ofpacts) | |
444 | { | |
445 | size_t ofs; | |
446 | ||
447 | ofpact_pad(ofpacts); | |
448 | ofs = ofpacts->size; | |
449 | ofpbuf_pull(ofpacts, ofs); | |
450 | ||
451 | return ofs; | |
452 | } | |
c2d936a4 BP |
453 | |
454 | #include "ofp-actions.inc1" | |
455 | \f | |
456 | /* Output actions. */ | |
457 | ||
458 | /* Action structure for OFPAT10_OUTPUT, which sends packets out 'port'. | |
459 | * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max | |
460 | * number of bytes to send. A 'max_len' of zero means no bytes of the | |
461 | * packet should be sent. */ | |
462 | struct ofp10_action_output { | |
463 | ovs_be16 type; /* OFPAT10_OUTPUT. */ | |
464 | ovs_be16 len; /* Length is 8. */ | |
465 | ovs_be16 port; /* Output port. */ | |
466 | ovs_be16 max_len; /* Max length to send to controller. */ | |
e45e72f1 | 467 | }; |
c2d936a4 BP |
468 | OFP_ASSERT(sizeof(struct ofp10_action_output) == 8); |
469 | ||
470 | /* Action structure for OFPAT_OUTPUT, which sends packets out 'port'. | |
471 | * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max | |
472 | * number of bytes to send. A 'max_len' of zero means no bytes of the | |
473 | * packet should be sent.*/ | |
474 | struct ofp11_action_output { | |
475 | ovs_be16 type; /* OFPAT11_OUTPUT. */ | |
476 | ovs_be16 len; /* Length is 16. */ | |
477 | ovs_be32 port; /* Output port. */ | |
478 | ovs_be16 max_len; /* Max length to send to controller. */ | |
479 | uint8_t pad[6]; /* Pad to 64 bits. */ | |
480 | }; | |
481 | OFP_ASSERT(sizeof(struct ofp11_action_output) == 16); | |
e45e72f1 | 482 | |
f25d0cf3 | 483 | static enum ofperr |
c2d936a4 | 484 | decode_OFPAT_RAW10_OUTPUT(const struct ofp10_action_output *oao, |
f3cd3ac7 | 485 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 486 | struct ofpbuf *out) |
f25d0cf3 BP |
487 | { |
488 | struct ofpact_output *output; | |
489 | ||
490 | output = ofpact_put_OUTPUT(out); | |
4e022ec0 | 491 | output->port = u16_to_ofp(ntohs(oao->port)); |
f25d0cf3 BP |
492 | output->max_len = ntohs(oao->max_len); |
493 | ||
57ad4e9e | 494 | return ofpact_check_output_port(output->port, OFPP_MAX); |
f25d0cf3 BP |
495 | } |
496 | ||
497 | static enum ofperr | |
c2d936a4 | 498 | decode_OFPAT_RAW11_OUTPUT(const struct ofp11_action_output *oao, |
f3cd3ac7 JS |
499 | enum ofp_version ofp_version OVS_UNUSED, |
500 | struct ofpbuf *out) | |
f25d0cf3 | 501 | { |
c2d936a4 BP |
502 | struct ofpact_output *output; |
503 | enum ofperr error; | |
f25d0cf3 | 504 | |
c2d936a4 BP |
505 | output = ofpact_put_OUTPUT(out); |
506 | output->max_len = ntohs(oao->max_len); | |
507 | ||
508 | error = ofputil_port_from_ofp11(oao->port, &output->port); | |
509 | if (error) { | |
510 | return error; | |
f25d0cf3 | 511 | } |
c2d936a4 BP |
512 | |
513 | return ofpact_check_output_port(output->port, OFPP_MAX); | |
f25d0cf3 BP |
514 | } |
515 | ||
516 | static void | |
c2d936a4 BP |
517 | encode_OUTPUT(const struct ofpact_output *output, |
518 | enum ofp_version ofp_version, struct ofpbuf *out) | |
f25d0cf3 | 519 | { |
c2d936a4 BP |
520 | if (ofp_version == OFP10_VERSION) { |
521 | struct ofp10_action_output *oao; | |
f25d0cf3 | 522 | |
c2d936a4 BP |
523 | oao = put_OFPAT10_OUTPUT(out); |
524 | oao->port = htons(ofp_to_u16(output->port)); | |
525 | oao->max_len = htons(output->max_len); | |
526 | } else { | |
527 | struct ofp11_action_output *oao; | |
528 | ||
529 | oao = put_OFPAT11_OUTPUT(out); | |
530 | oao->port = ofputil_port_to_ofp11(output->port); | |
531 | oao->max_len = htons(output->max_len); | |
532 | } | |
f25d0cf3 BP |
533 | } |
534 | ||
cab50449 | 535 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
536 | parse_OUTPUT(const char *arg, struct ofpbuf *ofpacts, |
537 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
f25d0cf3 | 538 | { |
c2d936a4 BP |
539 | if (strchr(arg, '[')) { |
540 | struct ofpact_output_reg *output_reg; | |
f25d0cf3 | 541 | |
c2d936a4 BP |
542 | output_reg = ofpact_put_OUTPUT_REG(ofpacts); |
543 | output_reg->max_len = UINT16_MAX; | |
544 | return mf_parse_subfield(&output_reg->src, arg); | |
545 | } else { | |
546 | struct ofpact_output *output; | |
547 | ||
548 | output = ofpact_put_OUTPUT(ofpacts); | |
549 | if (!ofputil_port_from_string(arg, &output->port)) { | |
550 | return xasprintf("%s: output to unknown port", arg); | |
551 | } | |
552 | output->max_len = output->port == OFPP_CONTROLLER ? UINT16_MAX : 0; | |
553 | return NULL; | |
f25d0cf3 | 554 | } |
c2d936a4 | 555 | } |
f25d0cf3 | 556 | |
c2d936a4 BP |
557 | static void |
558 | format_OUTPUT(const struct ofpact_output *a, struct ds *s) | |
559 | { | |
560 | if (ofp_to_u16(a->port) < ofp_to_u16(OFPP_MAX)) { | |
561 | ds_put_format(s, "output:%"PRIu16, a->port); | |
562 | } else { | |
563 | ofputil_format_port(a->port, s); | |
564 | if (a->port == OFPP_CONTROLLER) { | |
565 | ds_put_format(s, ":%"PRIu16, a->max_len); | |
566 | } | |
567 | } | |
f25d0cf3 | 568 | } |
c2d936a4 BP |
569 | \f |
570 | /* Group actions. */ | |
f25d0cf3 BP |
571 | |
572 | static enum ofperr | |
f3cd3ac7 JS |
573 | decode_OFPAT_RAW11_GROUP(uint32_t group_id, |
574 | enum ofp_version ofp_version OVS_UNUSED, | |
575 | struct ofpbuf *out) | |
f25d0cf3 | 576 | { |
c2d936a4 BP |
577 | ofpact_put_GROUP(out)->group_id = group_id; |
578 | return 0; | |
579 | } | |
f25d0cf3 | 580 | |
c2d936a4 BP |
581 | static void |
582 | encode_GROUP(const struct ofpact_group *group, | |
583 | enum ofp_version ofp_version, struct ofpbuf *out) | |
584 | { | |
585 | if (ofp_version == OFP10_VERSION) { | |
586 | /* XXX */ | |
587 | } else { | |
588 | put_OFPAT11_GROUP(out, group->group_id); | |
f25d0cf3 | 589 | } |
c2d936a4 | 590 | } |
f25d0cf3 | 591 | |
cab50449 | 592 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
593 | parse_GROUP(char *arg, struct ofpbuf *ofpacts, |
594 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
595 | { | |
596 | return str_to_u32(arg, &ofpact_put_GROUP(ofpacts)->group_id); | |
f25d0cf3 BP |
597 | } |
598 | ||
599 | static void | |
c2d936a4 | 600 | format_GROUP(const struct ofpact_group *a, struct ds *s) |
f25d0cf3 | 601 | { |
c2d936a4 | 602 | ds_put_format(s, "group:%"PRIu32, a->group_id); |
f25d0cf3 | 603 | } |
c2d936a4 BP |
604 | \f |
605 | /* Action structure for NXAST_CONTROLLER. | |
606 | * | |
607 | * This generalizes using OFPAT_OUTPUT to send a packet to OFPP_CONTROLLER. In | |
608 | * addition to the 'max_len' that OFPAT_OUTPUT supports, it also allows | |
609 | * specifying: | |
610 | * | |
611 | * - 'reason': The reason code to use in the ofp_packet_in or nx_packet_in. | |
612 | * | |
613 | * - 'controller_id': The ID of the controller connection to which the | |
614 | * ofp_packet_in should be sent. The ofp_packet_in or nx_packet_in is | |
615 | * sent only to controllers that have the specified controller connection | |
616 | * ID. See "struct nx_controller_id" for more information. */ | |
617 | struct nx_action_controller { | |
618 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
619 | ovs_be16 len; /* Length is 16. */ | |
620 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
621 | ovs_be16 subtype; /* NXAST_CONTROLLER. */ | |
622 | ovs_be16 max_len; /* Maximum length to send to controller. */ | |
623 | ovs_be16 controller_id; /* Controller ID to send packet-in. */ | |
624 | uint8_t reason; /* enum ofp_packet_in_reason (OFPR_*). */ | |
625 | uint8_t zero; /* Must be zero. */ | |
626 | }; | |
627 | OFP_ASSERT(sizeof(struct nx_action_controller) == 16); | |
f25d0cf3 | 628 | |
c2d936a4 BP |
629 | static enum ofperr |
630 | decode_NXAST_RAW_CONTROLLER(const struct nx_action_controller *nac, | |
f3cd3ac7 | 631 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 632 | struct ofpbuf *out) |
f25d0cf3 BP |
633 | { |
634 | struct ofpact_controller *oc; | |
635 | ||
636 | oc = ofpact_put_CONTROLLER(out); | |
637 | oc->max_len = ntohs(nac->max_len); | |
638 | oc->controller_id = ntohs(nac->controller_id); | |
639 | oc->reason = nac->reason; | |
c2d936a4 | 640 | return 0; |
f25d0cf3 BP |
641 | } |
642 | ||
c2d936a4 BP |
643 | static void |
644 | encode_CONTROLLER(const struct ofpact_controller *controller, | |
645 | enum ofp_version ofp_version OVS_UNUSED, | |
646 | struct ofpbuf *out) | |
4cceacb9 | 647 | { |
c2d936a4 | 648 | struct nx_action_controller *nac; |
4cceacb9 | 649 | |
c2d936a4 BP |
650 | nac = put_NXAST_CONTROLLER(out); |
651 | nac->max_len = htons(controller->max_len); | |
652 | nac->controller_id = htons(controller->controller_id); | |
653 | nac->reason = controller->reason; | |
654 | } | |
655 | ||
cab50449 | 656 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
657 | parse_CONTROLLER(char *arg, struct ofpbuf *ofpacts, |
658 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
659 | { | |
660 | enum ofp_packet_in_reason reason = OFPR_ACTION; | |
661 | uint16_t controller_id = 0; | |
662 | uint16_t max_len = UINT16_MAX; | |
663 | ||
664 | if (!arg[0]) { | |
665 | /* Use defaults. */ | |
666 | } else if (strspn(arg, "0123456789") == strlen(arg)) { | |
667 | char *error = str_to_u16(arg, "max_len", &max_len); | |
668 | if (error) { | |
669 | return error; | |
670 | } | |
671 | } else { | |
672 | char *name, *value; | |
673 | ||
674 | while (ofputil_parse_key_value(&arg, &name, &value)) { | |
675 | if (!strcmp(name, "reason")) { | |
676 | if (!ofputil_packet_in_reason_from_string(value, &reason)) { | |
677 | return xasprintf("unknown reason \"%s\"", value); | |
678 | } | |
679 | } else if (!strcmp(name, "max_len")) { | |
680 | char *error = str_to_u16(value, "max_len", &max_len); | |
681 | if (error) { | |
682 | return error; | |
683 | } | |
684 | } else if (!strcmp(name, "id")) { | |
685 | char *error = str_to_u16(value, "id", &controller_id); | |
686 | if (error) { | |
687 | return error; | |
688 | } | |
689 | } else { | |
690 | return xasprintf("unknown key \"%s\" parsing controller " | |
691 | "action", name); | |
692 | } | |
693 | } | |
4cceacb9 JS |
694 | } |
695 | ||
c2d936a4 BP |
696 | if (reason == OFPR_ACTION && controller_id == 0) { |
697 | struct ofpact_output *output; | |
4cceacb9 | 698 | |
c2d936a4 BP |
699 | output = ofpact_put_OUTPUT(ofpacts); |
700 | output->port = OFPP_CONTROLLER; | |
701 | output->max_len = max_len; | |
702 | } else { | |
703 | struct ofpact_controller *controller; | |
704 | ||
705 | controller = ofpact_put_CONTROLLER(ofpacts); | |
706 | controller->max_len = max_len; | |
707 | controller->reason = reason; | |
708 | controller->controller_id = controller_id; | |
709 | } | |
710 | ||
711 | return NULL; | |
4cceacb9 JS |
712 | } |
713 | ||
f25d0cf3 | 714 | static void |
c2d936a4 | 715 | format_CONTROLLER(const struct ofpact_controller *a, struct ds *s) |
f25d0cf3 | 716 | { |
c2d936a4 BP |
717 | if (a->reason == OFPR_ACTION && a->controller_id == 0) { |
718 | ds_put_format(s, "CONTROLLER:%"PRIu16, a->max_len); | |
719 | } else { | |
720 | enum ofp_packet_in_reason reason = a->reason; | |
f25d0cf3 | 721 | |
c2d936a4 BP |
722 | ds_put_cstr(s, "controller("); |
723 | if (reason != OFPR_ACTION) { | |
724 | char reasonbuf[OFPUTIL_PACKET_IN_REASON_BUFSIZE]; | |
725 | ||
726 | ds_put_format(s, "reason=%s,", | |
727 | ofputil_packet_in_reason_to_string( | |
728 | reason, reasonbuf, sizeof reasonbuf)); | |
729 | } | |
730 | if (a->max_len != UINT16_MAX) { | |
731 | ds_put_format(s, "max_len=%"PRIu16",", a->max_len); | |
732 | } | |
733 | if (a->controller_id != 0) { | |
734 | ds_put_format(s, "id=%"PRIu16",", a->controller_id); | |
735 | } | |
736 | ds_chomp(s, ','); | |
737 | ds_put_char(s, ')'); | |
738 | } | |
f25d0cf3 | 739 | } |
c2d936a4 BP |
740 | \f |
741 | /* Enqueue action. */ | |
742 | struct ofp10_action_enqueue { | |
743 | ovs_be16 type; /* OFPAT10_ENQUEUE. */ | |
744 | ovs_be16 len; /* Len is 16. */ | |
745 | ovs_be16 port; /* Port that queue belongs. Should | |
746 | refer to a valid physical port | |
747 | (i.e. < OFPP_MAX) or OFPP_IN_PORT. */ | |
748 | uint8_t pad[6]; /* Pad for 64-bit alignment. */ | |
749 | ovs_be32 queue_id; /* Where to enqueue the packets. */ | |
750 | }; | |
751 | OFP_ASSERT(sizeof(struct ofp10_action_enqueue) == 16); | |
f25d0cf3 | 752 | |
c2d967a5 | 753 | static enum ofperr |
c2d936a4 | 754 | decode_OFPAT_RAW10_ENQUEUE(const struct ofp10_action_enqueue *oae, |
f3cd3ac7 | 755 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 756 | struct ofpbuf *out) |
c2d967a5 | 757 | { |
c2d936a4 | 758 | struct ofpact_enqueue *enqueue; |
c2d967a5 | 759 | |
c2d936a4 BP |
760 | enqueue = ofpact_put_ENQUEUE(out); |
761 | enqueue->port = u16_to_ofp(ntohs(oae->port)); | |
762 | enqueue->queue = ntohl(oae->queue_id); | |
763 | if (ofp_to_u16(enqueue->port) >= ofp_to_u16(OFPP_MAX) | |
764 | && enqueue->port != OFPP_IN_PORT | |
765 | && enqueue->port != OFPP_LOCAL) { | |
766 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
767 | } | |
768 | return 0; | |
c2d967a5 MM |
769 | } |
770 | ||
c2d936a4 BP |
771 | static void |
772 | encode_ENQUEUE(const struct ofpact_enqueue *enqueue, | |
773 | enum ofp_version ofp_version, struct ofpbuf *out) | |
c2d967a5 | 774 | { |
c2d936a4 BP |
775 | if (ofp_version == OFP10_VERSION) { |
776 | struct ofp10_action_enqueue *oae; | |
c2d967a5 | 777 | |
c2d936a4 BP |
778 | oae = put_OFPAT10_ENQUEUE(out); |
779 | oae->port = htons(ofp_to_u16(enqueue->port)); | |
780 | oae->queue_id = htonl(enqueue->queue); | |
781 | } else { | |
782 | /* XXX */ | |
c2d967a5 | 783 | } |
c2d936a4 | 784 | } |
c2d967a5 | 785 | |
cab50449 | 786 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
787 | parse_ENQUEUE(char *arg, struct ofpbuf *ofpacts, |
788 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
789 | { | |
790 | char *sp = NULL; | |
791 | char *port = strtok_r(arg, ":q,", &sp); | |
792 | char *queue = strtok_r(NULL, "", &sp); | |
793 | struct ofpact_enqueue *enqueue; | |
c2d967a5 | 794 | |
c2d936a4 BP |
795 | if (port == NULL || queue == NULL) { |
796 | return xstrdup("\"enqueue\" syntax is \"enqueue:PORT:QUEUE\" or " | |
797 | "\"enqueue(PORT,QUEUE)\""); | |
c2d967a5 MM |
798 | } |
799 | ||
c2d936a4 BP |
800 | enqueue = ofpact_put_ENQUEUE(ofpacts); |
801 | if (!ofputil_port_from_string(port, &enqueue->port)) { | |
802 | return xasprintf("%s: enqueue to unknown port", port); | |
803 | } | |
804 | return str_to_u32(queue, &enqueue->queue); | |
c2d967a5 MM |
805 | } |
806 | ||
c2d936a4 BP |
807 | static void |
808 | format_ENQUEUE(const struct ofpact_enqueue *a, struct ds *s) | |
29089a54 | 809 | { |
c2d936a4 BP |
810 | ds_put_format(s, "enqueue:"); |
811 | ofputil_format_port(a->port, s); | |
812 | ds_put_format(s, ":%"PRIu32, a->queue); | |
813 | } | |
814 | \f | |
815 | /* Action structure for NXAST_OUTPUT_REG. | |
816 | * | |
817 | * Outputs to the OpenFlow port number written to src[ofs:ofs+nbits]. | |
818 | * | |
819 | * The format and semantics of 'src' and 'ofs_nbits' are similar to those for | |
820 | * the NXAST_REG_LOAD action. | |
821 | * | |
822 | * The acceptable nxm_header values for 'src' are the same as the acceptable | |
823 | * nxm_header values for the 'src' field of NXAST_REG_MOVE. | |
824 | * | |
825 | * The 'max_len' field indicates the number of bytes to send when the chosen | |
826 | * port is OFPP_CONTROLLER. Its semantics are equivalent to the 'max_len' | |
827 | * field of OFPAT_OUTPUT. | |
828 | * | |
829 | * The 'zero' field is required to be zeroed for forward compatibility. */ | |
830 | struct nx_action_output_reg { | |
831 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
832 | ovs_be16 len; /* 24. */ | |
833 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
834 | ovs_be16 subtype; /* NXAST_OUTPUT_REG. */ | |
29089a54 | 835 | |
c2d936a4 BP |
836 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ |
837 | ovs_be32 src; /* Source. */ | |
29089a54 | 838 | |
c2d936a4 | 839 | ovs_be16 max_len; /* Max length to send to controller. */ |
29089a54 | 840 | |
c2d936a4 BP |
841 | uint8_t zero[6]; /* Reserved, must be zero. */ |
842 | }; | |
843 | OFP_ASSERT(sizeof(struct nx_action_output_reg) == 24); | |
29089a54 | 844 | |
bad8a439 BP |
845 | /* Action structure for NXAST_OUTPUT_REG2. |
846 | * | |
847 | * Like the NXAST_OUTPUT_REG but organized so that there is room for a 64-bit | |
848 | * experimenter OXM as 'src'. | |
849 | */ | |
850 | struct nx_action_output_reg2 { | |
851 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
852 | ovs_be16 len; /* 24. */ | |
853 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
854 | ovs_be16 subtype; /* NXAST_OUTPUT_REG2. */ | |
855 | ||
856 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
857 | ovs_be16 max_len; /* Max length to send to controller. */ | |
858 | ||
859 | /* Followed by: | |
860 | * - 'src', as an OXM/NXM header (either 4 or 8 bytes). | |
861 | * - Enough 0-bytes to pad the action out to 24 bytes. */ | |
862 | uint8_t pad[10]; | |
863 | }; | |
864 | OFP_ASSERT(sizeof(struct nx_action_output_reg2) == 24); | |
865 | ||
a7a2d006 | 866 | static enum ofperr |
c2d936a4 | 867 | decode_NXAST_RAW_OUTPUT_REG(const struct nx_action_output_reg *naor, |
f3cd3ac7 | 868 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 869 | struct ofpbuf *out) |
a7a2d006 | 870 | { |
c2d936a4 | 871 | struct ofpact_output_reg *output_reg; |
a7a2d006 | 872 | |
c2d936a4 | 873 | if (!is_all_zeros(naor->zero, sizeof naor->zero)) { |
a7a2d006 JS |
874 | return OFPERR_OFPBAC_BAD_ARGUMENT; |
875 | } | |
a7a2d006 | 876 | |
c2d936a4 | 877 | output_reg = ofpact_put_OUTPUT_REG(out); |
bad8a439 | 878 | output_reg->ofpact.raw = NXAST_RAW_OUTPUT_REG; |
c2d936a4 BP |
879 | output_reg->src.field = mf_from_nxm_header(ntohl(naor->src)); |
880 | output_reg->src.ofs = nxm_decode_ofs(naor->ofs_nbits); | |
881 | output_reg->src.n_bits = nxm_decode_n_bits(naor->ofs_nbits); | |
882 | output_reg->max_len = ntohs(naor->max_len); | |
883 | ||
884 | return mf_check_src(&output_reg->src, NULL); | |
a7a2d006 JS |
885 | } |
886 | ||
bad8a439 BP |
887 | static enum ofperr |
888 | decode_NXAST_RAW_OUTPUT_REG2(const struct nx_action_output_reg2 *naor, | |
f3cd3ac7 JS |
889 | enum ofp_version ofp_version OVS_UNUSED, |
890 | struct ofpbuf *out) | |
bad8a439 BP |
891 | { |
892 | struct ofpact_output_reg *output_reg; | |
893 | enum ofperr error; | |
894 | struct ofpbuf b; | |
895 | ||
896 | output_reg = ofpact_put_OUTPUT_REG(out); | |
897 | output_reg->ofpact.raw = NXAST_RAW_OUTPUT_REG2; | |
898 | output_reg->src.ofs = nxm_decode_ofs(naor->ofs_nbits); | |
899 | output_reg->src.n_bits = nxm_decode_n_bits(naor->ofs_nbits); | |
900 | output_reg->max_len = ntohs(naor->max_len); | |
901 | ||
902 | ofpbuf_use_const(&b, naor, ntohs(naor->len)); | |
903 | ofpbuf_pull(&b, OBJECT_OFFSETOF(naor, pad)); | |
904 | error = nx_pull_header(&b, &output_reg->src.field, NULL); | |
905 | if (error) { | |
906 | return error; | |
907 | } | |
6fd6ed71 | 908 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
909 | return OFPERR_NXBRC_MUST_BE_ZERO; |
910 | } | |
911 | ||
912 | return mf_check_src(&output_reg->src, NULL); | |
913 | } | |
914 | ||
c2d936a4 BP |
915 | static void |
916 | encode_OUTPUT_REG(const struct ofpact_output_reg *output_reg, | |
917 | enum ofp_version ofp_version OVS_UNUSED, | |
918 | struct ofpbuf *out) | |
f25d0cf3 | 919 | { |
bad8a439 BP |
920 | /* If 'output_reg' came in as an NXAST_RAW_OUTPUT_REG2 action, or if it |
921 | * cannot be encoded in the older form, encode it as | |
922 | * NXAST_RAW_OUTPUT_REG2. */ | |
923 | if (output_reg->ofpact.raw == NXAST_RAW_OUTPUT_REG2 | |
924 | || !mf_nxm_header(output_reg->src.field->id)) { | |
925 | struct nx_action_output_reg2 *naor = put_NXAST_OUTPUT_REG2(out); | |
6fd6ed71 | 926 | size_t size = out->size; |
bad8a439 BP |
927 | |
928 | naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs, | |
929 | output_reg->src.n_bits); | |
930 | naor->max_len = htons(output_reg->max_len); | |
931 | ||
6fd6ed71 | 932 | out->size = size - sizeof naor->pad; |
bad8a439 | 933 | nx_put_header(out, output_reg->src.field->id, 0, false); |
6fd6ed71 | 934 | out->size = size; |
bad8a439 BP |
935 | } else { |
936 | struct nx_action_output_reg *naor = put_NXAST_OUTPUT_REG(out); | |
f25d0cf3 | 937 | |
bad8a439 BP |
938 | naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs, |
939 | output_reg->src.n_bits); | |
940 | naor->src = htonl(mf_nxm_header(output_reg->src.field->id)); | |
941 | naor->max_len = htons(output_reg->max_len); | |
942 | } | |
f25d0cf3 BP |
943 | } |
944 | ||
cab50449 | 945 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
946 | parse_OUTPUT_REG(const char *arg, struct ofpbuf *ofpacts, |
947 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
f25d0cf3 | 948 | { |
c2d936a4 | 949 | return parse_OUTPUT(arg, ofpacts, usable_protocols); |
f25d0cf3 BP |
950 | } |
951 | ||
c2d936a4 BP |
952 | static void |
953 | format_OUTPUT_REG(const struct ofpact_output_reg *a, struct ds *s) | |
f25d0cf3 | 954 | { |
c2d936a4 BP |
955 | ds_put_cstr(s, "output:"); |
956 | mf_format_subfield(&a->src, s); | |
957 | } | |
958 | \f | |
959 | /* Action structure for NXAST_BUNDLE and NXAST_BUNDLE_LOAD. | |
960 | * | |
961 | * The bundle actions choose a slave from a supplied list of options. | |
962 | * NXAST_BUNDLE outputs to its selection. NXAST_BUNDLE_LOAD writes its | |
963 | * selection to a register. | |
964 | * | |
965 | * The list of possible slaves follows the nx_action_bundle structure. The size | |
966 | * of each slave is governed by its type as indicated by the 'slave_type' | |
967 | * parameter. The list of slaves should be padded at its end with zeros to make | |
968 | * the total length of the action a multiple of 8. | |
969 | * | |
970 | * Switches infer from the 'slave_type' parameter the size of each slave. All | |
971 | * implementations must support the NXM_OF_IN_PORT 'slave_type' which indicates | |
972 | * that the slaves are OpenFlow port numbers with NXM_LENGTH(NXM_OF_IN_PORT) == | |
973 | * 2 byte width. Switches should reject actions which indicate unknown or | |
974 | * unsupported slave types. | |
975 | * | |
976 | * Switches use a strategy dictated by the 'algorithm' parameter to choose a | |
977 | * slave. If the switch does not support the specified 'algorithm' parameter, | |
978 | * it should reject the action. | |
979 | * | |
980 | * Several algorithms take into account liveness when selecting slaves. The | |
981 | * liveness of a slave is implementation defined (with one exception), but will | |
982 | * generally take into account things like its carrier status and the results | |
983 | * of any link monitoring protocols which happen to be running on it. In order | |
984 | * to give controllers a place-holder value, the OFPP_NONE port is always | |
985 | * considered live. | |
986 | * | |
987 | * Some slave selection strategies require the use of a hash function, in which | |
988 | * case the 'fields' and 'basis' parameters should be populated. The 'fields' | |
989 | * parameter (one of NX_HASH_FIELDS_*) designates which parts of the flow to | |
990 | * hash. Refer to the definition of "enum nx_hash_fields" for details. The | |
991 | * 'basis' parameter is used as a universal hash parameter. Different values | |
992 | * of 'basis' yield different hash results. | |
993 | * | |
994 | * The 'zero' parameter at the end of the action structure is reserved for | |
995 | * future use. Switches are required to reject actions which have nonzero | |
996 | * bytes in the 'zero' field. | |
997 | * | |
998 | * NXAST_BUNDLE actions should have 'ofs_nbits' and 'dst' zeroed. Switches | |
999 | * should reject actions which have nonzero bytes in either of these fields. | |
1000 | * | |
1001 | * NXAST_BUNDLE_LOAD stores the OpenFlow port number of the selected slave in | |
1002 | * dst[ofs:ofs+n_bits]. The format and semantics of 'dst' and 'ofs_nbits' are | |
1003 | * similar to those for the NXAST_REG_LOAD action. */ | |
1004 | struct nx_action_bundle { | |
1005 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
1006 | ovs_be16 len; /* Length including slaves. */ | |
1007 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
1008 | ovs_be16 subtype; /* NXAST_BUNDLE or NXAST_BUNDLE_LOAD. */ | |
f25d0cf3 | 1009 | |
c2d936a4 BP |
1010 | /* Slave choice algorithm to apply to hash value. */ |
1011 | ovs_be16 algorithm; /* One of NX_BD_ALG_*. */ | |
4cceacb9 | 1012 | |
c2d936a4 BP |
1013 | /* What fields to hash and how. */ |
1014 | ovs_be16 fields; /* One of NX_HASH_FIELDS_*. */ | |
1015 | ovs_be16 basis; /* Universal hash parameter. */ | |
f25d0cf3 | 1016 | |
c2d936a4 BP |
1017 | ovs_be32 slave_type; /* NXM_OF_IN_PORT. */ |
1018 | ovs_be16 n_slaves; /* Number of slaves. */ | |
f25d0cf3 | 1019 | |
c2d936a4 BP |
1020 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ |
1021 | ovs_be32 dst; /* Destination. */ | |
f25d0cf3 | 1022 | |
c2d936a4 BP |
1023 | uint8_t zero[4]; /* Reserved. Must be zero. */ |
1024 | }; | |
1025 | OFP_ASSERT(sizeof(struct nx_action_bundle) == 32); | |
f25d0cf3 | 1026 | |
c2d936a4 BP |
1027 | static enum ofperr |
1028 | decode_bundle(bool load, const struct nx_action_bundle *nab, | |
1029 | struct ofpbuf *ofpacts) | |
1030 | { | |
1031 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1032 | struct ofpact_bundle *bundle; | |
1033 | uint32_t slave_type; | |
1034 | size_t slaves_size, i; | |
1035 | enum ofperr error; | |
bd85dac1 | 1036 | |
c2d936a4 BP |
1037 | bundle = ofpact_put_BUNDLE(ofpacts); |
1038 | ||
1039 | bundle->n_slaves = ntohs(nab->n_slaves); | |
1040 | bundle->basis = ntohs(nab->basis); | |
1041 | bundle->fields = ntohs(nab->fields); | |
1042 | bundle->algorithm = ntohs(nab->algorithm); | |
1043 | slave_type = ntohl(nab->slave_type); | |
1044 | slaves_size = ntohs(nab->len) - sizeof *nab; | |
1045 | ||
1046 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1047 | if (!flow_hash_fields_valid(bundle->fields)) { | |
1048 | VLOG_WARN_RL(&rl, "unsupported fields %d", (int) bundle->fields); | |
1049 | } else if (bundle->n_slaves > BUNDLE_MAX_SLAVES) { | |
1050 | VLOG_WARN_RL(&rl, "too many slaves"); | |
1051 | } else if (bundle->algorithm != NX_BD_ALG_HRW | |
1052 | && bundle->algorithm != NX_BD_ALG_ACTIVE_BACKUP) { | |
1053 | VLOG_WARN_RL(&rl, "unsupported algorithm %d", (int) bundle->algorithm); | |
508a9338 | 1054 | } else if (slave_type != mf_nxm_header(MFF_IN_PORT)) { |
c2d936a4 BP |
1055 | VLOG_WARN_RL(&rl, "unsupported slave type %"PRIu16, slave_type); |
1056 | } else { | |
1057 | error = 0; | |
1058 | } | |
bd85dac1 | 1059 | |
c2d936a4 BP |
1060 | if (!is_all_zeros(nab->zero, sizeof nab->zero)) { |
1061 | VLOG_WARN_RL(&rl, "reserved field is nonzero"); | |
1062 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1063 | } | |
f25d0cf3 | 1064 | |
c2d936a4 BP |
1065 | if (load) { |
1066 | bundle->dst.field = mf_from_nxm_header(ntohl(nab->dst)); | |
1067 | bundle->dst.ofs = nxm_decode_ofs(nab->ofs_nbits); | |
1068 | bundle->dst.n_bits = nxm_decode_n_bits(nab->ofs_nbits); | |
f25d0cf3 | 1069 | |
c2d936a4 BP |
1070 | if (bundle->dst.n_bits < 16) { |
1071 | VLOG_WARN_RL(&rl, "bundle_load action requires at least 16 bit " | |
1072 | "destination."); | |
1073 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1074 | } | |
1075 | } else { | |
1076 | if (nab->ofs_nbits || nab->dst) { | |
1077 | VLOG_WARN_RL(&rl, "bundle action has nonzero reserved fields"); | |
1078 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1079 | } | |
1080 | } | |
f25d0cf3 | 1081 | |
c2d936a4 BP |
1082 | if (slaves_size < bundle->n_slaves * sizeof(ovs_be16)) { |
1083 | VLOG_WARN_RL(&rl, "Nicira action %s only has %"PRIuSIZE" bytes " | |
1084 | "allocated for slaves. %"PRIuSIZE" bytes are required " | |
1085 | "for %"PRIu16" slaves.", | |
1086 | load ? "bundle_load" : "bundle", slaves_size, | |
1087 | bundle->n_slaves * sizeof(ovs_be16), bundle->n_slaves); | |
1088 | error = OFPERR_OFPBAC_BAD_LEN; | |
1089 | } | |
f25d0cf3 | 1090 | |
c2d936a4 BP |
1091 | for (i = 0; i < bundle->n_slaves; i++) { |
1092 | uint16_t ofp_port = ntohs(((ovs_be16 *)(nab + 1))[i]); | |
1093 | ofpbuf_put(ofpacts, &ofp_port, sizeof ofp_port); | |
1094 | } | |
f25d0cf3 | 1095 | |
6fd6ed71 | 1096 | bundle = ofpacts->header; |
c2d936a4 | 1097 | ofpact_update_len(ofpacts, &bundle->ofpact); |
f25d0cf3 | 1098 | |
c2d936a4 BP |
1099 | if (!error) { |
1100 | error = bundle_check(bundle, OFPP_MAX, NULL); | |
1101 | } | |
1102 | return error; | |
1103 | } | |
f25d0cf3 | 1104 | |
c2d936a4 | 1105 | static enum ofperr |
f3cd3ac7 JS |
1106 | decode_NXAST_RAW_BUNDLE(const struct nx_action_bundle *nab, |
1107 | enum ofp_version ofp_version OVS_UNUSED, | |
1108 | struct ofpbuf *out) | |
c2d936a4 BP |
1109 | { |
1110 | return decode_bundle(false, nab, out); | |
1111 | } | |
f25d0cf3 | 1112 | |
c2d936a4 BP |
1113 | static enum ofperr |
1114 | decode_NXAST_RAW_BUNDLE_LOAD(const struct nx_action_bundle *nab, | |
f3cd3ac7 | 1115 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
1116 | struct ofpbuf *out) |
1117 | { | |
1118 | return decode_bundle(true, nab, out); | |
1119 | } | |
c2d967a5 | 1120 | |
c2d936a4 BP |
1121 | static void |
1122 | encode_BUNDLE(const struct ofpact_bundle *bundle, | |
1123 | enum ofp_version ofp_version OVS_UNUSED, | |
1124 | struct ofpbuf *out) | |
1125 | { | |
1126 | int slaves_len = ROUND_UP(2 * bundle->n_slaves, OFP_ACTION_ALIGN); | |
1127 | struct nx_action_bundle *nab; | |
1128 | ovs_be16 *slaves; | |
1129 | size_t i; | |
f25d0cf3 | 1130 | |
c2d936a4 BP |
1131 | nab = (bundle->dst.field |
1132 | ? put_NXAST_BUNDLE_LOAD(out) | |
1133 | : put_NXAST_BUNDLE(out)); | |
1134 | nab->len = htons(ntohs(nab->len) + slaves_len); | |
1135 | nab->algorithm = htons(bundle->algorithm); | |
1136 | nab->fields = htons(bundle->fields); | |
1137 | nab->basis = htons(bundle->basis); | |
508a9338 | 1138 | nab->slave_type = htonl(mf_nxm_header(MFF_IN_PORT)); |
c2d936a4 BP |
1139 | nab->n_slaves = htons(bundle->n_slaves); |
1140 | if (bundle->dst.field) { | |
1141 | nab->ofs_nbits = nxm_encode_ofs_nbits(bundle->dst.ofs, | |
1142 | bundle->dst.n_bits); | |
508a9338 | 1143 | nab->dst = htonl(mf_nxm_header(bundle->dst.field->id)); |
c2d936a4 | 1144 | } |
f25d0cf3 | 1145 | |
c2d936a4 BP |
1146 | slaves = ofpbuf_put_zeros(out, slaves_len); |
1147 | for (i = 0; i < bundle->n_slaves; i++) { | |
1148 | slaves[i] = htons(ofp_to_u16(bundle->slaves[i])); | |
1149 | } | |
1150 | } | |
b02475c5 | 1151 | |
cab50449 | 1152 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1153 | parse_BUNDLE(const char *arg, struct ofpbuf *ofpacts, |
1154 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1155 | { | |
1156 | return bundle_parse(arg, ofpacts); | |
1157 | } | |
b02475c5 | 1158 | |
cab50449 | 1159 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1160 | parse_bundle_load(const char *arg, struct ofpbuf *ofpacts) |
1161 | { | |
1162 | return bundle_parse_load(arg, ofpacts); | |
1163 | } | |
097d4939 | 1164 | |
c2d936a4 BP |
1165 | static void |
1166 | format_BUNDLE(const struct ofpact_bundle *a, struct ds *s) | |
1167 | { | |
1168 | bundle_format(a, s); | |
1169 | } | |
1170 | \f | |
1171 | /* Set VLAN actions. */ | |
097d4939 | 1172 | |
c2d936a4 BP |
1173 | static enum ofperr |
1174 | decode_set_vlan_vid(uint16_t vid, bool push_vlan_if_needed, struct ofpbuf *out) | |
1175 | { | |
1176 | if (vid & ~0xfff) { | |
1177 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1178 | } else { | |
1179 | struct ofpact_vlan_vid *vlan_vid = ofpact_put_SET_VLAN_VID(out); | |
1180 | vlan_vid->vlan_vid = vid; | |
1181 | vlan_vid->push_vlan_if_needed = push_vlan_if_needed; | |
1182 | return 0; | |
1183 | } | |
1184 | } | |
0f3f3c3d | 1185 | |
c2d936a4 | 1186 | static enum ofperr |
f3cd3ac7 JS |
1187 | decode_OFPAT_RAW10_SET_VLAN_VID(uint16_t vid, |
1188 | enum ofp_version ofp_version OVS_UNUSED, | |
1189 | struct ofpbuf *out) | |
c2d936a4 BP |
1190 | { |
1191 | return decode_set_vlan_vid(vid, true, out); | |
1192 | } | |
b676167a | 1193 | |
c2d936a4 | 1194 | static enum ofperr |
f3cd3ac7 JS |
1195 | decode_OFPAT_RAW11_SET_VLAN_VID(uint16_t vid, |
1196 | enum ofp_version ofp_version OVS_UNUSED, | |
1197 | struct ofpbuf *out) | |
c2d936a4 BP |
1198 | { |
1199 | return decode_set_vlan_vid(vid, false, out); | |
1200 | } | |
29089a54 | 1201 | |
c2d936a4 BP |
1202 | static void |
1203 | encode_SET_VLAN_VID(const struct ofpact_vlan_vid *vlan_vid, | |
1204 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1205 | { | |
1206 | uint16_t vid = vlan_vid->vlan_vid; | |
1207 | ||
1208 | /* Push a VLAN tag, if none is present and this form of the action calls | |
1209 | * for such a feature. */ | |
1210 | if (ofp_version > OFP10_VERSION | |
1211 | && vlan_vid->push_vlan_if_needed | |
1212 | && !vlan_vid->flow_has_vlan) { | |
1213 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
f25d0cf3 BP |
1214 | } |
1215 | ||
c2d936a4 BP |
1216 | if (ofp_version == OFP10_VERSION) { |
1217 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
1218 | } else if (ofp_version == OFP11_VERSION) { | |
1219 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
1220 | } else { | |
1221 | ofpact_put_set_field(out, ofp_version, | |
1222 | MFF_VLAN_VID, vid | OFPVID12_PRESENT); | |
1223 | } | |
f25d0cf3 BP |
1224 | } |
1225 | ||
cab50449 | 1226 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 1227 | parse_set_vlan_vid(char *arg, struct ofpbuf *ofpacts, bool push_vlan_if_needed) |
d01c980f | 1228 | { |
ca287d20 | 1229 | struct ofpact_vlan_vid *vlan_vid; |
c2d936a4 BP |
1230 | uint16_t vid; |
1231 | char *error; | |
d01c980f | 1232 | |
c2d936a4 | 1233 | error = str_to_u16(arg, "VLAN VID", &vid); |
d01c980f BP |
1234 | if (error) { |
1235 | return error; | |
1236 | } | |
1237 | ||
c2d936a4 BP |
1238 | if (vid & ~VLAN_VID_MASK) { |
1239 | return xasprintf("%s: not a valid VLAN VID", arg); | |
d01c980f | 1240 | } |
c2d936a4 BP |
1241 | vlan_vid = ofpact_put_SET_VLAN_VID(ofpacts); |
1242 | vlan_vid->vlan_vid = vid; | |
1243 | vlan_vid->push_vlan_if_needed = push_vlan_if_needed; | |
1244 | return NULL; | |
1245 | } | |
d01c980f | 1246 | |
cab50449 | 1247 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1248 | parse_SET_VLAN_VID(char *arg, struct ofpbuf *ofpacts, |
1249 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1250 | { | |
1251 | return parse_set_vlan_vid(arg, ofpacts, false); | |
d01c980f BP |
1252 | } |
1253 | ||
c2d936a4 BP |
1254 | static void |
1255 | format_SET_VLAN_VID(const struct ofpact_vlan_vid *a, struct ds *s) | |
1256 | { | |
1257 | ds_put_format(s, "%s:%"PRIu16, | |
1258 | a->push_vlan_if_needed ? "mod_vlan_vid" : "set_vlan_vid", | |
1259 | a->vlan_vid); | |
1260 | } | |
1261 | \f | |
1262 | /* Set PCP actions. */ | |
e3f8f887 | 1263 | |
c2d936a4 BP |
1264 | static enum ofperr |
1265 | decode_set_vlan_pcp(uint8_t pcp, bool push_vlan_if_needed, struct ofpbuf *out) | |
f25d0cf3 | 1266 | { |
c2d936a4 BP |
1267 | if (pcp & ~7) { |
1268 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1269 | } else { | |
1270 | struct ofpact_vlan_pcp *vlan_pcp = ofpact_put_SET_VLAN_PCP(out); | |
1271 | vlan_pcp->vlan_pcp = pcp; | |
1272 | vlan_pcp->push_vlan_if_needed = push_vlan_if_needed; | |
1273 | return 0; | |
1274 | } | |
f25d0cf3 BP |
1275 | } |
1276 | ||
c2d936a4 | 1277 | static enum ofperr |
f3cd3ac7 JS |
1278 | decode_OFPAT_RAW10_SET_VLAN_PCP(uint8_t pcp, |
1279 | enum ofp_version ofp_version OVS_UNUSED, | |
1280 | struct ofpbuf *out) | |
f25d0cf3 | 1281 | { |
c2d936a4 | 1282 | return decode_set_vlan_pcp(pcp, true, out); |
f25d0cf3 BP |
1283 | } |
1284 | ||
c2d936a4 | 1285 | static enum ofperr |
f3cd3ac7 JS |
1286 | decode_OFPAT_RAW11_SET_VLAN_PCP(uint8_t pcp, |
1287 | enum ofp_version ofp_version OVS_UNUSED, | |
1288 | struct ofpbuf *out) | |
c2d936a4 BP |
1289 | { |
1290 | return decode_set_vlan_pcp(pcp, false, out); | |
1291 | } | |
f25d0cf3 | 1292 | |
699dddf1 | 1293 | static void |
c2d936a4 BP |
1294 | encode_SET_VLAN_PCP(const struct ofpact_vlan_pcp *vlan_pcp, |
1295 | enum ofp_version ofp_version, struct ofpbuf *out) | |
699dddf1 | 1296 | { |
c2d936a4 BP |
1297 | uint8_t pcp = vlan_pcp->vlan_pcp; |
1298 | ||
1299 | /* Push a VLAN tag, if none is present and this form of the action calls | |
1300 | * for such a feature. */ | |
1301 | if (ofp_version > OFP10_VERSION | |
1302 | && vlan_pcp->push_vlan_if_needed | |
1303 | && !vlan_pcp->flow_has_vlan) { | |
1304 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
1305 | } | |
699dddf1 | 1306 | |
c2d936a4 BP |
1307 | if (ofp_version == OFP10_VERSION) { |
1308 | put_OFPAT10_SET_VLAN_PCP(out, pcp); | |
1309 | } else if (ofp_version == OFP11_VERSION) { | |
1310 | put_OFPAT11_SET_VLAN_PCP(out, pcp); | |
1311 | } else { | |
1312 | ofpact_put_set_field(out, ofp_version, MFF_VLAN_PCP, pcp); | |
699dddf1 BP |
1313 | } |
1314 | } | |
1315 | ||
cab50449 | 1316 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 1317 | parse_set_vlan_pcp(char *arg, struct ofpbuf *ofpacts, bool push_vlan_if_needed) |
f25d0cf3 | 1318 | { |
c2d936a4 BP |
1319 | struct ofpact_vlan_pcp *vlan_pcp; |
1320 | uint8_t pcp; | |
1321 | char *error; | |
e3f8f887 | 1322 | |
c2d936a4 BP |
1323 | error = str_to_u8(arg, "VLAN PCP", &pcp); |
1324 | if (error) { | |
699dddf1 | 1325 | return error; |
f25d0cf3 BP |
1326 | } |
1327 | ||
c2d936a4 BP |
1328 | if (pcp & ~7) { |
1329 | return xasprintf("%s: not a valid VLAN PCP", arg); | |
1330 | } | |
1331 | vlan_pcp = ofpact_put_SET_VLAN_PCP(ofpacts); | |
1332 | vlan_pcp->vlan_pcp = pcp; | |
1333 | vlan_pcp->push_vlan_if_needed = push_vlan_if_needed; | |
1334 | return NULL; | |
1335 | } | |
1336 | ||
cab50449 | 1337 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1338 | parse_SET_VLAN_PCP(char *arg, struct ofpbuf *ofpacts, |
1339 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1340 | { | |
1341 | return parse_set_vlan_pcp(arg, ofpacts, false); | |
1342 | } | |
1343 | ||
1344 | static void | |
1345 | format_SET_VLAN_PCP(const struct ofpact_vlan_pcp *a, struct ds *s) | |
1346 | { | |
1347 | ds_put_format(s, "%s:%"PRIu8, | |
1348 | a->push_vlan_if_needed ? "mod_vlan_pcp" : "set_vlan_pcp", | |
1349 | a->vlan_pcp); | |
1350 | } | |
1351 | \f | |
1352 | /* Strip VLAN actions. */ | |
1353 | ||
1354 | static enum ofperr | |
1355 | decode_OFPAT_RAW10_STRIP_VLAN(struct ofpbuf *out) | |
1356 | { | |
1357 | ofpact_put_STRIP_VLAN(out)->ofpact.raw = OFPAT_RAW10_STRIP_VLAN; | |
f25d0cf3 BP |
1358 | return 0; |
1359 | } | |
1360 | ||
8f2cded4 | 1361 | static enum ofperr |
c2d936a4 | 1362 | decode_OFPAT_RAW11_POP_VLAN(struct ofpbuf *out) |
8f2cded4 | 1363 | { |
c2d936a4 BP |
1364 | ofpact_put_STRIP_VLAN(out)->ofpact.raw = OFPAT_RAW11_POP_VLAN; |
1365 | return 0; | |
1366 | } | |
f25d0cf3 | 1367 | |
c2d936a4 BP |
1368 | static void |
1369 | encode_STRIP_VLAN(const struct ofpact_null *null OVS_UNUSED, | |
1370 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1371 | { | |
1372 | if (ofp_version == OFP10_VERSION) { | |
1373 | put_OFPAT10_STRIP_VLAN(out); | |
1374 | } else { | |
1375 | put_OFPAT11_POP_VLAN(out); | |
1376 | } | |
1377 | } | |
f25d0cf3 | 1378 | |
cab50449 | 1379 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1380 | parse_STRIP_VLAN(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
1381 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1382 | { | |
1383 | ofpact_put_STRIP_VLAN(ofpacts)->ofpact.raw = OFPAT_RAW10_STRIP_VLAN; | |
1384 | return NULL; | |
1385 | } | |
1386 | ||
cab50449 | 1387 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1388 | parse_pop_vlan(struct ofpbuf *ofpacts) |
1389 | { | |
1390 | ofpact_put_STRIP_VLAN(ofpacts)->ofpact.raw = OFPAT_RAW11_POP_VLAN; | |
1391 | return NULL; | |
1392 | } | |
1393 | ||
1394 | static void | |
1395 | format_STRIP_VLAN(const struct ofpact_null *a, struct ds *s) | |
1396 | { | |
1397 | ds_put_cstr(s, (a->ofpact.raw == OFPAT_RAW11_POP_VLAN | |
1398 | ? "pop_vlan" | |
1399 | : "strip_vlan")); | |
1400 | } | |
1401 | \f | |
1402 | /* Push VLAN action. */ | |
1403 | ||
1404 | static enum ofperr | |
f3cd3ac7 JS |
1405 | decode_OFPAT_RAW11_PUSH_VLAN(ovs_be16 eth_type, |
1406 | enum ofp_version ofp_version OVS_UNUSED, | |
1407 | struct ofpbuf *out) | |
c2d936a4 BP |
1408 | { |
1409 | if (eth_type != htons(ETH_TYPE_VLAN_8021Q)) { | |
1410 | /* XXX 802.1AD(QinQ) isn't supported at the moment */ | |
1411 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
f25d0cf3 | 1412 | } |
c2d936a4 BP |
1413 | ofpact_put_PUSH_VLAN(out); |
1414 | return 0; | |
1415 | } | |
f25d0cf3 | 1416 | |
c2d936a4 BP |
1417 | static void |
1418 | encode_PUSH_VLAN(const struct ofpact_null *null OVS_UNUSED, | |
1419 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1420 | { | |
1421 | if (ofp_version == OFP10_VERSION) { | |
1422 | /* PUSH is a side effect of a SET_VLAN_VID/PCP, which should | |
1423 | * follow this action. */ | |
1424 | } else { | |
1425 | /* XXX ETH_TYPE_VLAN_8021AD case */ | |
1426 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
f25d0cf3 | 1427 | } |
c2d936a4 | 1428 | } |
f25d0cf3 | 1429 | |
cab50449 | 1430 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1431 | parse_PUSH_VLAN(char *arg, struct ofpbuf *ofpacts, |
1432 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1433 | { | |
1434 | uint16_t ethertype; | |
1435 | char *error; | |
1436 | ||
1437 | *usable_protocols &= OFPUTIL_P_OF11_UP; | |
1438 | error = str_to_u16(arg, "ethertype", ðertype); | |
4cceacb9 | 1439 | if (error) { |
4cceacb9 JS |
1440 | return error; |
1441 | } | |
1442 | ||
c2d936a4 BP |
1443 | if (ethertype != ETH_TYPE_VLAN_8021Q) { |
1444 | /* XXX ETH_TYPE_VLAN_8021AD case isn't supported */ | |
1445 | return xasprintf("%s: not a valid VLAN ethertype", arg); | |
f25d0cf3 | 1446 | } |
c2d936a4 BP |
1447 | |
1448 | ofpact_put_PUSH_VLAN(ofpacts); | |
1449 | return NULL; | |
d01c980f BP |
1450 | } |
1451 | ||
c2d936a4 BP |
1452 | static void |
1453 | format_PUSH_VLAN(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
8f2cded4 | 1454 | { |
c2d936a4 BP |
1455 | /* XXX 802.1AD case*/ |
1456 | ds_put_format(s, "push_vlan:%#"PRIx16, ETH_TYPE_VLAN_8021Q); | |
8f2cded4 | 1457 | } |
d01c980f | 1458 | \f |
c2d936a4 BP |
1459 | /* Action structure for OFPAT10_SET_DL_SRC/DST and OFPAT11_SET_DL_SRC/DST. */ |
1460 | struct ofp_action_dl_addr { | |
1461 | ovs_be16 type; /* Type. */ | |
1462 | ovs_be16 len; /* Length is 16. */ | |
74ff3298 | 1463 | struct eth_addr dl_addr; /* Ethernet address. */ |
c2d936a4 BP |
1464 | uint8_t pad[6]; |
1465 | }; | |
1466 | OFP_ASSERT(sizeof(struct ofp_action_dl_addr) == 16); | |
d01c980f | 1467 | |
d01c980f | 1468 | static enum ofperr |
c2d936a4 | 1469 | decode_OFPAT_RAW_SET_DL_SRC(const struct ofp_action_dl_addr *a, |
f3cd3ac7 | 1470 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 1471 | struct ofpbuf *out) |
d01c980f | 1472 | { |
74ff3298 | 1473 | ofpact_put_SET_ETH_SRC(out)->mac = a->dl_addr; |
c2d936a4 BP |
1474 | return 0; |
1475 | } | |
3ddcaf2d | 1476 | |
c2d936a4 BP |
1477 | static enum ofperr |
1478 | decode_OFPAT_RAW_SET_DL_DST(const struct ofp_action_dl_addr *a, | |
f3cd3ac7 | 1479 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
1480 | struct ofpbuf *out) |
1481 | { | |
74ff3298 | 1482 | ofpact_put_SET_ETH_DST(out)->mac = a->dl_addr; |
c2d936a4 BP |
1483 | return 0; |
1484 | } | |
d01c980f | 1485 | |
c2d936a4 BP |
1486 | static void |
1487 | encode_SET_ETH_addr(const struct ofpact_mac *mac, enum ofp_version ofp_version, | |
1488 | enum ofp_raw_action_type raw, enum mf_field_id field, | |
1489 | struct ofpbuf *out) | |
1490 | { | |
c2d936a4 BP |
1491 | if (ofp_version < OFP12_VERSION) { |
1492 | struct ofp_action_dl_addr *oada; | |
1493 | ||
1494 | oada = ofpact_put_raw(out, ofp_version, raw, 0); | |
74ff3298 | 1495 | oada->dl_addr = mac->mac; |
c2d936a4 BP |
1496 | } else { |
1497 | ofpact_put_set_field(out, ofp_version, field, | |
74ff3298 | 1498 | eth_addr_to_uint64(mac->mac)); |
d01c980f BP |
1499 | } |
1500 | } | |
1501 | ||
c2d936a4 BP |
1502 | static void |
1503 | encode_SET_ETH_SRC(const struct ofpact_mac *mac, enum ofp_version ofp_version, | |
1504 | struct ofpbuf *out) | |
b2dd70be | 1505 | { |
c2d936a4 BP |
1506 | encode_SET_ETH_addr(mac, ofp_version, OFPAT_RAW_SET_DL_SRC, MFF_ETH_SRC, |
1507 | out); | |
b2dd70be | 1508 | |
c2d936a4 | 1509 | } |
b2dd70be | 1510 | |
c2d936a4 BP |
1511 | static void |
1512 | encode_SET_ETH_DST(const struct ofpact_mac *mac, | |
1513 | enum ofp_version ofp_version, | |
1514 | struct ofpbuf *out) | |
1515 | { | |
1516 | encode_SET_ETH_addr(mac, ofp_version, OFPAT_RAW_SET_DL_DST, MFF_ETH_DST, | |
1517 | out); | |
b2dd70be | 1518 | |
c2d936a4 | 1519 | } |
b2dd70be | 1520 | |
cab50449 | 1521 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1522 | parse_SET_ETH_SRC(char *arg, struct ofpbuf *ofpacts, |
1523 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1524 | { | |
74ff3298 | 1525 | return str_to_mac(arg, &ofpact_put_SET_ETH_SRC(ofpacts)->mac); |
c2d936a4 BP |
1526 | } |
1527 | ||
cab50449 | 1528 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1529 | parse_SET_ETH_DST(char *arg, struct ofpbuf *ofpacts, |
1530 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1531 | { | |
74ff3298 | 1532 | return str_to_mac(arg, &ofpact_put_SET_ETH_DST(ofpacts)->mac); |
b2dd70be JR |
1533 | } |
1534 | ||
1535 | static void | |
c2d936a4 | 1536 | format_SET_ETH_SRC(const struct ofpact_mac *a, struct ds *s) |
b2dd70be | 1537 | { |
c2d936a4 BP |
1538 | ds_put_format(s, "mod_dl_src:"ETH_ADDR_FMT, ETH_ADDR_ARGS(a->mac)); |
1539 | } | |
b2dd70be | 1540 | |
c2d936a4 BP |
1541 | static void |
1542 | format_SET_ETH_DST(const struct ofpact_mac *a, struct ds *s) | |
1543 | { | |
1544 | ds_put_format(s, "mod_dl_dst:"ETH_ADDR_FMT, ETH_ADDR_ARGS(a->mac)); | |
1545 | } | |
1546 | \f | |
1547 | /* Set IPv4 address actions. */ | |
b2dd70be | 1548 | |
c2d936a4 | 1549 | static enum ofperr |
f3cd3ac7 JS |
1550 | decode_OFPAT_RAW_SET_NW_SRC(ovs_be32 ipv4, |
1551 | enum ofp_version ofp_version OVS_UNUSED, | |
1552 | struct ofpbuf *out) | |
c2d936a4 BP |
1553 | { |
1554 | ofpact_put_SET_IPV4_SRC(out)->ipv4 = ipv4; | |
1555 | return 0; | |
b2dd70be JR |
1556 | } |
1557 | ||
c2d936a4 | 1558 | static enum ofperr |
f3cd3ac7 JS |
1559 | decode_OFPAT_RAW_SET_NW_DST(ovs_be32 ipv4, |
1560 | enum ofp_version ofp_version OVS_UNUSED, | |
1561 | struct ofpbuf *out) | |
b2dd70be | 1562 | { |
c2d936a4 BP |
1563 | ofpact_put_SET_IPV4_DST(out)->ipv4 = ipv4; |
1564 | return 0; | |
1565 | } | |
b2dd70be | 1566 | |
c2d936a4 BP |
1567 | static void |
1568 | encode_SET_IPV4_addr(const struct ofpact_ipv4 *ipv4, | |
1569 | enum ofp_version ofp_version, | |
1570 | enum ofp_raw_action_type raw, enum mf_field_id field, | |
1571 | struct ofpbuf *out) | |
1572 | { | |
1573 | ovs_be32 addr = ipv4->ipv4; | |
1574 | if (ofp_version < OFP12_VERSION) { | |
1575 | ofpact_put_raw(out, ofp_version, raw, ntohl(addr)); | |
b2dd70be | 1576 | } else { |
c2d936a4 | 1577 | ofpact_put_set_field(out, ofp_version, field, ntohl(addr)); |
b2dd70be JR |
1578 | } |
1579 | } | |
1580 | ||
a6fd70bb | 1581 | static void |
c2d936a4 BP |
1582 | encode_SET_IPV4_SRC(const struct ofpact_ipv4 *ipv4, |
1583 | enum ofp_version ofp_version, struct ofpbuf *out) | |
a6fd70bb | 1584 | { |
c2d936a4 BP |
1585 | encode_SET_IPV4_addr(ipv4, ofp_version, OFPAT_RAW_SET_NW_SRC, MFF_IPV4_SRC, |
1586 | out); | |
1587 | } | |
a6fd70bb | 1588 | |
c2d936a4 BP |
1589 | static void |
1590 | encode_SET_IPV4_DST(const struct ofpact_ipv4 *ipv4, | |
1591 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1592 | { | |
1593 | encode_SET_IPV4_addr(ipv4, ofp_version, OFPAT_RAW_SET_NW_DST, MFF_IPV4_DST, | |
1594 | out); | |
1595 | } | |
a6fd70bb | 1596 | |
cab50449 | 1597 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1598 | parse_SET_IPV4_SRC(char *arg, struct ofpbuf *ofpacts, |
1599 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1600 | { | |
1601 | return str_to_ip(arg, &ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4); | |
1602 | } | |
a6fd70bb | 1603 | |
cab50449 | 1604 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1605 | parse_SET_IPV4_DST(char *arg, struct ofpbuf *ofpacts, |
1606 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1607 | { | |
1608 | return str_to_ip(arg, &ofpact_put_SET_IPV4_DST(ofpacts)->ipv4); | |
1609 | } | |
a6fd70bb | 1610 | |
c2d936a4 BP |
1611 | static void |
1612 | format_SET_IPV4_SRC(const struct ofpact_ipv4 *a, struct ds *s) | |
1613 | { | |
1614 | ds_put_format(s, "mod_nw_src:"IP_FMT, IP_ARGS(a->ipv4)); | |
1615 | } | |
097d4939 | 1616 | |
c2d936a4 BP |
1617 | static void |
1618 | format_SET_IPV4_DST(const struct ofpact_ipv4 *a, struct ds *s) | |
1619 | { | |
1620 | ds_put_format(s, "mod_nw_dst:"IP_FMT, IP_ARGS(a->ipv4)); | |
1621 | } | |
1622 | \f | |
1623 | /* Set IPv4/v6 TOS actions. */ | |
097d4939 | 1624 | |
c2d936a4 | 1625 | static enum ofperr |
f3cd3ac7 JS |
1626 | decode_OFPAT_RAW_SET_NW_TOS(uint8_t dscp, |
1627 | enum ofp_version ofp_version OVS_UNUSED, | |
1628 | struct ofpbuf *out) | |
c2d936a4 BP |
1629 | { |
1630 | if (dscp & ~IP_DSCP_MASK) { | |
1631 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1632 | } else { | |
1633 | ofpact_put_SET_IP_DSCP(out)->dscp = dscp; | |
1634 | return 0; | |
a6fd70bb JR |
1635 | } |
1636 | } | |
1637 | ||
a6fd70bb | 1638 | static void |
c2d936a4 BP |
1639 | encode_SET_IP_DSCP(const struct ofpact_dscp *dscp, |
1640 | enum ofp_version ofp_version, struct ofpbuf *out) | |
a6fd70bb | 1641 | { |
c2d936a4 BP |
1642 | if (ofp_version < OFP12_VERSION) { |
1643 | put_OFPAT_SET_NW_TOS(out, ofp_version, dscp->dscp); | |
1644 | } else { | |
1645 | ofpact_put_set_field(out, ofp_version, | |
1646 | MFF_IP_DSCP_SHIFTED, dscp->dscp >> 2); | |
1647 | } | |
1648 | } | |
a6fd70bb | 1649 | |
cab50449 | 1650 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1651 | parse_SET_IP_DSCP(char *arg, struct ofpbuf *ofpacts, |
1652 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1653 | { | |
1654 | uint8_t tos; | |
1655 | char *error; | |
a6fd70bb | 1656 | |
c2d936a4 BP |
1657 | error = str_to_u8(arg, "TOS", &tos); |
1658 | if (error) { | |
1659 | return error; | |
1660 | } | |
a6fd70bb | 1661 | |
c2d936a4 BP |
1662 | if (tos & ~IP_DSCP_MASK) { |
1663 | return xasprintf("%s: not a valid TOS", arg); | |
a6fd70bb | 1664 | } |
c2d936a4 BP |
1665 | ofpact_put_SET_IP_DSCP(ofpacts)->dscp = tos; |
1666 | return NULL; | |
a6fd70bb JR |
1667 | } |
1668 | ||
b2dd70be | 1669 | static void |
c2d936a4 | 1670 | format_SET_IP_DSCP(const struct ofpact_dscp *a, struct ds *s) |
b2dd70be | 1671 | { |
c2d936a4 BP |
1672 | ds_put_format(s, "mod_nw_tos:%d", a->dscp); |
1673 | } | |
1674 | \f | |
1675 | /* Set IPv4/v6 ECN actions. */ | |
b2dd70be | 1676 | |
c2d936a4 | 1677 | static enum ofperr |
f3cd3ac7 JS |
1678 | decode_OFPAT_RAW11_SET_NW_ECN(uint8_t ecn, |
1679 | enum ofp_version ofp_version OVS_UNUSED, | |
1680 | struct ofpbuf *out) | |
c2d936a4 BP |
1681 | { |
1682 | if (ecn & ~IP_ECN_MASK) { | |
1683 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
b2dd70be | 1684 | } else { |
c2d936a4 BP |
1685 | ofpact_put_SET_IP_ECN(out)->ecn = ecn; |
1686 | return 0; | |
b2dd70be JR |
1687 | } |
1688 | } | |
1689 | ||
c2d936a4 BP |
1690 | static void |
1691 | encode_SET_IP_ECN(const struct ofpact_ecn *ip_ecn, | |
1692 | enum ofp_version ofp_version, struct ofpbuf *out) | |
d01c980f | 1693 | { |
c2d936a4 BP |
1694 | uint8_t ecn = ip_ecn->ecn; |
1695 | if (ofp_version == OFP10_VERSION) { | |
1696 | /* XXX */ | |
1697 | } else if (ofp_version == OFP11_VERSION) { | |
1698 | put_OFPAT11_SET_NW_ECN(out, ecn); | |
1699 | } else { | |
1700 | ofpact_put_set_field(out, ofp_version, MFF_IP_ECN, ecn); | |
1701 | } | |
1702 | } | |
d01c980f | 1703 | |
cab50449 | 1704 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1705 | parse_SET_IP_ECN(char *arg, struct ofpbuf *ofpacts, |
1706 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1707 | { | |
1708 | uint8_t ecn; | |
1709 | char *error; | |
d01c980f | 1710 | |
c2d936a4 | 1711 | error = str_to_u8(arg, "ECN", &ecn); |
d01c980f BP |
1712 | if (error) { |
1713 | return error; | |
1714 | } | |
1715 | ||
c2d936a4 BP |
1716 | if (ecn & ~IP_ECN_MASK) { |
1717 | return xasprintf("%s: not a valid ECN", arg); | |
1718 | } | |
1719 | ofpact_put_SET_IP_ECN(ofpacts)->ecn = ecn; | |
1720 | return NULL; | |
d01c980f BP |
1721 | } |
1722 | ||
c2d936a4 BP |
1723 | static void |
1724 | format_SET_IP_ECN(const struct ofpact_ecn *a, struct ds *s) | |
1725 | { | |
1726 | ds_put_format(s, "mod_nw_ecn:%d", a->ecn); | |
1727 | } | |
1728 | \f | |
1729 | /* Set IPv4/v6 TTL actions. */ | |
1730 | ||
d01c980f | 1731 | static enum ofperr |
f3cd3ac7 JS |
1732 | decode_OFPAT_RAW11_SET_NW_TTL(uint8_t ttl, |
1733 | enum ofp_version ofp_version OVS_UNUSED, | |
1734 | struct ofpbuf *out) | |
d01c980f | 1735 | { |
c2d936a4 BP |
1736 | ofpact_put_SET_IP_TTL(out)->ttl = ttl; |
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | static void | |
1741 | encode_SET_IP_TTL(const struct ofpact_ip_ttl *ttl, | |
1742 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1743 | { | |
1744 | if (ofp_version >= OFP11_VERSION) { | |
1745 | put_OFPAT11_SET_NW_TTL(out, ttl->ttl); | |
1746 | } else { | |
1747 | /* XXX */ | |
1748 | } | |
1749 | } | |
1750 | ||
cab50449 | 1751 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1752 | parse_SET_IP_TTL(char *arg, struct ofpbuf *ofpacts, |
1753 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1754 | { | |
1755 | uint8_t ttl; | |
1756 | char *error; | |
d01c980f | 1757 | |
c2d936a4 | 1758 | error = str_to_u8(arg, "TTL", &ttl); |
d01c980f BP |
1759 | if (error) { |
1760 | return error; | |
1761 | } | |
1762 | ||
c2d936a4 BP |
1763 | ofpact_put_SET_IP_TTL(ofpacts)->ttl = ttl; |
1764 | return NULL; | |
1765 | } | |
d01c980f | 1766 | |
c2d936a4 BP |
1767 | static void |
1768 | format_SET_IP_TTL(const struct ofpact_ip_ttl *a, struct ds *s) | |
1769 | { | |
1770 | ds_put_format(s, "mod_nw_ttl:%d", a->ttl); | |
1771 | } | |
1772 | \f | |
1773 | /* Set TCP/UDP/SCTP port actions. */ | |
d01c980f | 1774 | |
c2d936a4 | 1775 | static enum ofperr |
f3cd3ac7 JS |
1776 | decode_OFPAT_RAW_SET_TP_SRC(ovs_be16 port, |
1777 | enum ofp_version ofp_version OVS_UNUSED, | |
1778 | struct ofpbuf *out) | |
c2d936a4 BP |
1779 | { |
1780 | ofpact_put_SET_L4_SRC_PORT(out)->port = ntohs(port); | |
1781 | return 0; | |
1782 | } | |
d01c980f | 1783 | |
c2d936a4 | 1784 | static enum ofperr |
f3cd3ac7 JS |
1785 | decode_OFPAT_RAW_SET_TP_DST(ovs_be16 port, |
1786 | enum ofp_version ofp_version OVS_UNUSED, | |
1787 | struct ofpbuf *out) | |
c2d936a4 BP |
1788 | { |
1789 | ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(port); | |
1790 | return 0; | |
1791 | } | |
d01c980f | 1792 | |
c2d936a4 BP |
1793 | static void |
1794 | encode_SET_L4_port(const struct ofpact_l4_port *l4_port, | |
1795 | enum ofp_version ofp_version, enum ofp_raw_action_type raw, | |
1796 | enum mf_field_id field, struct ofpbuf *out) | |
1797 | { | |
1798 | uint16_t port = l4_port->port; | |
3e34fbdd | 1799 | |
c2d936a4 BP |
1800 | if (ofp_version >= OFP12_VERSION && field != MFF_N_IDS) { |
1801 | ofpact_put_set_field(out, ofp_version, field, port); | |
1802 | } else { | |
1803 | ofpact_put_raw(out, ofp_version, raw, port); | |
1804 | } | |
1805 | } | |
8e61c110 | 1806 | |
c2d936a4 BP |
1807 | static void |
1808 | encode_SET_L4_SRC_PORT(const struct ofpact_l4_port *l4_port, | |
1809 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1810 | { | |
1811 | uint8_t proto = l4_port->flow_ip_proto; | |
1812 | enum mf_field_id field = (proto == IPPROTO_TCP ? MFF_TCP_SRC | |
1813 | : proto == IPPROTO_UDP ? MFF_UDP_SRC | |
1814 | : proto == IPPROTO_SCTP ? MFF_SCTP_SRC | |
1815 | : MFF_N_IDS); | |
276c4e7a | 1816 | |
c2d936a4 BP |
1817 | encode_SET_L4_port(l4_port, ofp_version, OFPAT_RAW_SET_TP_SRC, field, out); |
1818 | } | |
d01c980f | 1819 | |
c2d936a4 BP |
1820 | static void |
1821 | encode_SET_L4_DST_PORT(const struct ofpact_l4_port *l4_port, | |
1822 | enum ofp_version ofp_version, | |
1823 | struct ofpbuf *out) | |
1824 | { | |
1825 | uint8_t proto = l4_port->flow_ip_proto; | |
1826 | enum mf_field_id field = (proto == IPPROTO_TCP ? MFF_TCP_DST | |
1827 | : proto == IPPROTO_UDP ? MFF_UDP_DST | |
1828 | : proto == IPPROTO_SCTP ? MFF_SCTP_DST | |
1829 | : MFF_N_IDS); | |
d01c980f | 1830 | |
c2d936a4 BP |
1831 | encode_SET_L4_port(l4_port, ofp_version, OFPAT_RAW_SET_TP_DST, field, out); |
1832 | } | |
7bcb1506 | 1833 | |
cab50449 | 1834 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1835 | parse_SET_L4_SRC_PORT(char *arg, struct ofpbuf *ofpacts, |
1836 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1837 | { | |
1838 | return str_to_u16(arg, "source port", | |
1839 | &ofpact_put_SET_L4_SRC_PORT(ofpacts)->port); | |
1840 | } | |
d01c980f | 1841 | |
cab50449 | 1842 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1843 | parse_SET_L4_DST_PORT(char *arg, struct ofpbuf *ofpacts, |
1844 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1845 | { | |
1846 | return str_to_u16(arg, "destination port", | |
1847 | &ofpact_put_SET_L4_DST_PORT(ofpacts)->port); | |
1848 | } | |
d01c980f | 1849 | |
c2d936a4 BP |
1850 | static void |
1851 | format_SET_L4_SRC_PORT(const struct ofpact_l4_port *a, struct ds *s) | |
1852 | { | |
1853 | ds_put_format(s, "mod_tp_src:%d", a->port); | |
1854 | } | |
d01c980f | 1855 | |
c2d936a4 BP |
1856 | static void |
1857 | format_SET_L4_DST_PORT(const struct ofpact_l4_port *a, struct ds *s) | |
1858 | { | |
1859 | ds_put_format(s, "mod_tp_dst:%d", a->port); | |
1860 | } | |
1861 | \f | |
73178f20 BP |
1862 | /* Action structure for OFPAT_COPY_FIELD. */ |
1863 | struct ofp15_action_copy_field { | |
1864 | ovs_be16 type; /* OFPAT_COPY_FIELD. */ | |
1865 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
1866 | ovs_be16 n_bits; /* Number of bits to copy. */ | |
1867 | ovs_be16 src_offset; /* Starting bit offset in source. */ | |
1868 | ovs_be16 dst_offset; /* Starting bit offset in destination. */ | |
650763d8 | 1869 | uint8_t pad[2]; |
f13cdd73 BP |
1870 | /* Followed by: |
1871 | * - OXM header for source field. | |
1872 | * - OXM header for destination field. | |
1873 | * - Padding with 0-bytes to a multiple of 8 bytes. | |
650763d8 BP |
1874 | * The "pad2" member is the beginning of the above. */ |
1875 | uint8_t pad2[4]; | |
73178f20 | 1876 | }; |
f13cdd73 | 1877 | OFP_ASSERT(sizeof(struct ofp15_action_copy_field) == 16); |
73178f20 | 1878 | |
914624f8 BP |
1879 | /* Action structure for OpenFlow 1.3 extension copy-field action.. */ |
1880 | struct onf_action_copy_field { | |
1881 | ovs_be16 type; /* OFPAT_EXPERIMENTER. */ | |
1882 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
1883 | ovs_be32 experimenter; /* ONF_VENDOR_ID. */ | |
1884 | ovs_be16 exp_type; /* 3200. */ | |
1885 | uint8_t pad[2]; /* Not used. */ | |
1886 | ovs_be16 n_bits; /* Number of bits to copy. */ | |
1887 | ovs_be16 src_offset; /* Starting bit offset in source. */ | |
1888 | ovs_be16 dst_offset; /* Starting bit offset in destination. */ | |
1889 | uint8_t pad2[2]; /* Not used. */ | |
1890 | /* Followed by: | |
1891 | * - OXM header for source field. | |
1892 | * - OXM header for destination field. | |
1893 | * - Padding with 0-bytes (either 0 or 4 of them) to a multiple of 8 bytes. | |
1894 | * The "pad3" member is the beginning of the above. */ | |
1895 | uint8_t pad3[4]; /* Not used. */ | |
1896 | }; | |
1897 | OFP_ASSERT(sizeof(struct onf_action_copy_field) == 24); | |
1898 | ||
c2d936a4 BP |
1899 | /* Action structure for NXAST_REG_MOVE. |
1900 | * | |
1901 | * Copies src[src_ofs:src_ofs+n_bits] to dst[dst_ofs:dst_ofs+n_bits], where | |
1902 | * a[b:c] denotes the bits within 'a' numbered 'b' through 'c' (not including | |
1903 | * bit 'c'). Bit numbering starts at 0 for the least-significant bit, 1 for | |
1904 | * the next most significant bit, and so on. | |
1905 | * | |
1906 | * 'src' and 'dst' are nxm_header values with nxm_hasmask=0. (It doesn't make | |
1907 | * sense to use nxm_hasmask=1 because the action does not do any kind of | |
1908 | * matching; it uses the actual value of a field.) | |
1909 | * | |
1910 | * The following nxm_header values are potentially acceptable as 'src': | |
1911 | * | |
1912 | * - NXM_OF_IN_PORT | |
1913 | * - NXM_OF_ETH_DST | |
1914 | * - NXM_OF_ETH_SRC | |
1915 | * - NXM_OF_ETH_TYPE | |
1916 | * - NXM_OF_VLAN_TCI | |
1917 | * - NXM_OF_IP_TOS | |
1918 | * - NXM_OF_IP_PROTO | |
1919 | * - NXM_OF_IP_SRC | |
1920 | * - NXM_OF_IP_DST | |
1921 | * - NXM_OF_TCP_SRC | |
1922 | * - NXM_OF_TCP_DST | |
1923 | * - NXM_OF_UDP_SRC | |
1924 | * - NXM_OF_UDP_DST | |
1925 | * - NXM_OF_ICMP_TYPE | |
1926 | * - NXM_OF_ICMP_CODE | |
1927 | * - NXM_OF_ARP_OP | |
1928 | * - NXM_OF_ARP_SPA | |
1929 | * - NXM_OF_ARP_TPA | |
1930 | * - NXM_NX_TUN_ID | |
1931 | * - NXM_NX_ARP_SHA | |
1932 | * - NXM_NX_ARP_THA | |
1933 | * - NXM_NX_ICMPV6_TYPE | |
1934 | * - NXM_NX_ICMPV6_CODE | |
1935 | * - NXM_NX_ND_SLL | |
1936 | * - NXM_NX_ND_TLL | |
1937 | * - NXM_NX_REG(idx) for idx in the switch's accepted range. | |
1938 | * - NXM_NX_PKT_MARK | |
1939 | * - NXM_NX_TUN_IPV4_SRC | |
1940 | * - NXM_NX_TUN_IPV4_DST | |
1941 | * | |
1942 | * The following nxm_header values are potentially acceptable as 'dst': | |
1943 | * | |
1944 | * - NXM_OF_ETH_DST | |
1945 | * - NXM_OF_ETH_SRC | |
1946 | * - NXM_OF_IP_TOS | |
1947 | * - NXM_OF_IP_SRC | |
1948 | * - NXM_OF_IP_DST | |
1949 | * - NXM_OF_TCP_SRC | |
1950 | * - NXM_OF_TCP_DST | |
1951 | * - NXM_OF_UDP_SRC | |
1952 | * - NXM_OF_UDP_DST | |
f6ecf944 JP |
1953 | * - NXM_OF_ICMP_TYPE |
1954 | * - NXM_OF_ICMP_CODE | |
1955 | * - NXM_NX_ICMPV6_TYPE | |
1956 | * - NXM_NX_ICMPV6_CODE | |
c2d936a4 BP |
1957 | * - NXM_NX_ARP_SHA |
1958 | * - NXM_NX_ARP_THA | |
1959 | * - NXM_OF_ARP_OP | |
1960 | * - NXM_OF_ARP_SPA | |
1961 | * - NXM_OF_ARP_TPA | |
1962 | * Modifying any of the above fields changes the corresponding packet | |
1963 | * header. | |
1964 | * | |
1965 | * - NXM_OF_IN_PORT | |
1966 | * | |
1967 | * - NXM_NX_REG(idx) for idx in the switch's accepted range. | |
1968 | * | |
1969 | * - NXM_NX_PKT_MARK | |
1970 | * | |
1971 | * - NXM_OF_VLAN_TCI. Modifying this field's value has side effects on the | |
1972 | * packet's 802.1Q header. Setting a value with CFI=0 removes the 802.1Q | |
1973 | * header (if any), ignoring the other bits. Setting a value with CFI=1 | |
1974 | * adds or modifies the 802.1Q header appropriately, setting the TCI field | |
1975 | * to the field's new value (with the CFI bit masked out). | |
1976 | * | |
1977 | * - NXM_NX_TUN_ID, NXM_NX_TUN_IPV4_SRC, NXM_NX_TUN_IPV4_DST. Modifying | |
1978 | * any of these values modifies the corresponding tunnel header field used | |
1979 | * for the packet's next tunnel encapsulation, if allowed by the | |
1980 | * configuration of the output tunnel port. | |
1981 | * | |
1982 | * A given nxm_header value may be used as 'src' or 'dst' only on a flow whose | |
1983 | * nx_match satisfies its prerequisites. For example, NXM_OF_IP_TOS may be | |
1984 | * used only if the flow's nx_match includes an nxm_entry that specifies | |
1985 | * nxm_type=NXM_OF_ETH_TYPE, nxm_hasmask=0, and nxm_value=0x0800. | |
1986 | * | |
1987 | * The switch will reject actions for which src_ofs+n_bits is greater than the | |
1988 | * width of 'src' or dst_ofs+n_bits is greater than the width of 'dst' with | |
1989 | * error type OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT. | |
1990 | * | |
1991 | * This action behaves properly when 'src' overlaps with 'dst', that is, it | |
1992 | * behaves as if 'src' were copied out to a temporary buffer, then the | |
1993 | * temporary buffer copied to 'dst'. | |
1994 | */ | |
1995 | struct nx_action_reg_move { | |
1996 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
1997 | ovs_be16 len; /* Length is 24. */ | |
1998 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
1999 | ovs_be16 subtype; /* NXAST_REG_MOVE. */ | |
2000 | ovs_be16 n_bits; /* Number of bits. */ | |
2001 | ovs_be16 src_ofs; /* Starting bit offset in source. */ | |
2002 | ovs_be16 dst_ofs; /* Starting bit offset in destination. */ | |
bad8a439 BP |
2003 | /* Followed by: |
2004 | * - OXM/NXM header for source field (4 or 8 bytes). | |
2005 | * - OXM/NXM header for destination field (4 or 8 bytes). | |
2006 | * - Padding with 0-bytes to a multiple of 8 bytes, if necessary. */ | |
c2d936a4 | 2007 | }; |
bad8a439 | 2008 | OFP_ASSERT(sizeof(struct nx_action_reg_move) == 16); |
ff14eb7a | 2009 | |
73178f20 | 2010 | static enum ofperr |
914624f8 BP |
2011 | decode_copy_field__(ovs_be16 src_offset, ovs_be16 dst_offset, ovs_be16 n_bits, |
2012 | const void *action, ovs_be16 action_len, size_t oxm_offset, | |
2013 | struct ofpbuf *ofpacts) | |
73178f20 BP |
2014 | { |
2015 | struct ofpact_reg_move *move; | |
f13cdd73 | 2016 | enum ofperr error; |
f13cdd73 | 2017 | struct ofpbuf b; |
73178f20 BP |
2018 | |
2019 | move = ofpact_put_REG_MOVE(ofpacts); | |
914624f8 BP |
2020 | move->ofpact.raw = ONFACT_RAW13_COPY_FIELD; |
2021 | move->src.ofs = ntohs(src_offset); | |
2022 | move->src.n_bits = ntohs(n_bits); | |
2023 | move->dst.ofs = ntohs(dst_offset); | |
2024 | move->dst.n_bits = ntohs(n_bits); | |
2025 | ||
2026 | ofpbuf_use_const(&b, action, ntohs(action_len)); | |
2027 | ofpbuf_pull(&b, oxm_offset); | |
f13cdd73 BP |
2028 | error = nx_pull_header(&b, &move->src.field, NULL); |
2029 | if (error) { | |
2030 | return error; | |
2031 | } | |
2032 | error = nx_pull_header(&b, &move->dst.field, NULL); | |
2033 | if (error) { | |
2034 | return error; | |
2035 | } | |
f13cdd73 | 2036 | |
6fd6ed71 | 2037 | if (!is_all_zeros(b.data, b.size)) { |
f13cdd73 BP |
2038 | return OFPERR_NXBRC_MUST_BE_ZERO; |
2039 | } | |
2040 | ||
73178f20 BP |
2041 | return nxm_reg_move_check(move, NULL); |
2042 | } | |
2043 | ||
914624f8 BP |
2044 | static enum ofperr |
2045 | decode_OFPAT_RAW15_COPY_FIELD(const struct ofp15_action_copy_field *oacf, | |
f3cd3ac7 | 2046 | enum ofp_version ofp_version OVS_UNUSED, |
914624f8 BP |
2047 | struct ofpbuf *ofpacts) |
2048 | { | |
2049 | return decode_copy_field__(oacf->src_offset, oacf->dst_offset, | |
2050 | oacf->n_bits, oacf, oacf->len, | |
2051 | OBJECT_OFFSETOF(oacf, pad2), ofpacts); | |
2052 | } | |
2053 | ||
2054 | static enum ofperr | |
2055 | decode_ONFACT_RAW13_COPY_FIELD(const struct onf_action_copy_field *oacf, | |
f3cd3ac7 | 2056 | enum ofp_version ofp_version OVS_UNUSED, |
914624f8 BP |
2057 | struct ofpbuf *ofpacts) |
2058 | { | |
2059 | return decode_copy_field__(oacf->src_offset, oacf->dst_offset, | |
2060 | oacf->n_bits, oacf, oacf->len, | |
2061 | OBJECT_OFFSETOF(oacf, pad3), ofpacts); | |
2062 | } | |
2063 | ||
c2d936a4 BP |
2064 | static enum ofperr |
2065 | decode_NXAST_RAW_REG_MOVE(const struct nx_action_reg_move *narm, | |
f3cd3ac7 | 2066 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
2067 | struct ofpbuf *ofpacts) |
2068 | { | |
2069 | struct ofpact_reg_move *move; | |
bad8a439 BP |
2070 | enum ofperr error; |
2071 | struct ofpbuf b; | |
0c20dbe4 | 2072 | |
c2d936a4 | 2073 | move = ofpact_put_REG_MOVE(ofpacts); |
914624f8 | 2074 | move->ofpact.raw = NXAST_RAW_REG_MOVE; |
c2d936a4 BP |
2075 | move->src.ofs = ntohs(narm->src_ofs); |
2076 | move->src.n_bits = ntohs(narm->n_bits); | |
c2d936a4 BP |
2077 | move->dst.ofs = ntohs(narm->dst_ofs); |
2078 | move->dst.n_bits = ntohs(narm->n_bits); | |
d01c980f | 2079 | |
bad8a439 BP |
2080 | ofpbuf_use_const(&b, narm, ntohs(narm->len)); |
2081 | ofpbuf_pull(&b, sizeof *narm); | |
2082 | error = nx_pull_header(&b, &move->src.field, NULL); | |
2083 | if (error) { | |
2084 | return error; | |
2085 | } | |
2086 | error = nx_pull_header(&b, &move->dst.field, NULL); | |
2087 | if (error) { | |
2088 | return error; | |
2089 | } | |
6fd6ed71 | 2090 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2091 | return OFPERR_NXBRC_MUST_BE_ZERO; |
2092 | } | |
2093 | ||
c2d936a4 BP |
2094 | return nxm_reg_move_check(move, NULL); |
2095 | } | |
d01c980f | 2096 | |
c2d936a4 BP |
2097 | static void |
2098 | encode_REG_MOVE(const struct ofpact_reg_move *move, | |
73178f20 BP |
2099 | enum ofp_version ofp_version, struct ofpbuf *out) |
2100 | { | |
914624f8 BP |
2101 | /* For OpenFlow 1.3, the choice of ONFACT_RAW13_COPY_FIELD versus |
2102 | * NXAST_RAW_REG_MOVE is somewhat difficult. Neither one is guaranteed to | |
2103 | * be supported by every OpenFlow 1.3 implementation. It would be ideal to | |
2104 | * probe for support. Until we have that ability, we currently prefer | |
2105 | * NXAST_RAW_REG_MOVE for backward compatibility with older Open vSwitch | |
2106 | * versions. */ | |
6fd6ed71 | 2107 | size_t start_ofs = out->size; |
73178f20 | 2108 | if (ofp_version >= OFP15_VERSION) { |
bad8a439 | 2109 | struct ofp15_action_copy_field *copy = put_OFPAT15_COPY_FIELD(out); |
73178f20 BP |
2110 | copy->n_bits = htons(move->dst.n_bits); |
2111 | copy->src_offset = htons(move->src.ofs); | |
2112 | copy->dst_offset = htons(move->dst.ofs); | |
6fd6ed71 | 2113 | out->size = out->size - sizeof copy->pad2; |
f13cdd73 BP |
2114 | nx_put_header(out, move->src.field->id, ofp_version, false); |
2115 | nx_put_header(out, move->dst.field->id, ofp_version, false); | |
914624f8 BP |
2116 | } else if (ofp_version == OFP13_VERSION |
2117 | && move->ofpact.raw == ONFACT_RAW13_COPY_FIELD) { | |
2118 | struct onf_action_copy_field *copy = put_ONFACT13_COPY_FIELD(out); | |
2119 | copy->n_bits = htons(move->dst.n_bits); | |
2120 | copy->src_offset = htons(move->src.ofs); | |
2121 | copy->dst_offset = htons(move->dst.ofs); | |
6fd6ed71 | 2122 | out->size = out->size - sizeof copy->pad3; |
914624f8 BP |
2123 | nx_put_header(out, move->src.field->id, ofp_version, false); |
2124 | nx_put_header(out, move->dst.field->id, ofp_version, false); | |
73178f20 | 2125 | } else { |
bad8a439 | 2126 | struct nx_action_reg_move *narm = put_NXAST_REG_MOVE(out); |
73178f20 BP |
2127 | narm->n_bits = htons(move->dst.n_bits); |
2128 | narm->src_ofs = htons(move->src.ofs); | |
2129 | narm->dst_ofs = htons(move->dst.ofs); | |
bad8a439 BP |
2130 | nx_put_header(out, move->src.field->id, 0, false); |
2131 | nx_put_header(out, move->dst.field->id, 0, false); | |
73178f20 | 2132 | } |
bad8a439 | 2133 | pad_ofpat(out, start_ofs); |
c2d936a4 | 2134 | } |
e9536ecb | 2135 | |
cab50449 | 2136 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2137 | parse_REG_MOVE(const char *arg, struct ofpbuf *ofpacts, |
2138 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2139 | { | |
2140 | struct ofpact_reg_move *move = ofpact_put_REG_MOVE(ofpacts); | |
2141 | const char *full_arg = arg; | |
2142 | char *error; | |
097d4939 | 2143 | |
c2d936a4 BP |
2144 | error = mf_parse_subfield__(&move->src, &arg); |
2145 | if (error) { | |
2146 | return error; | |
2147 | } | |
2148 | if (strncmp(arg, "->", 2)) { | |
2149 | return xasprintf("%s: missing `->' following source", full_arg); | |
2150 | } | |
2151 | arg += 2; | |
2152 | error = mf_parse_subfield(&move->dst, arg); | |
2153 | if (error) { | |
2154 | return error; | |
2155 | } | |
097d4939 | 2156 | |
c2d936a4 BP |
2157 | if (move->src.n_bits != move->dst.n_bits) { |
2158 | return xasprintf("%s: source field is %d bits wide but destination is " | |
2159 | "%d bits wide", full_arg, | |
2160 | move->src.n_bits, move->dst.n_bits); | |
2161 | } | |
2162 | return NULL; | |
2163 | } | |
0f3f3c3d | 2164 | |
c2d936a4 BP |
2165 | static void |
2166 | format_REG_MOVE(const struct ofpact_reg_move *a, struct ds *s) | |
2167 | { | |
2168 | nxm_format_reg_move(a, s); | |
2169 | } | |
2170 | \f | |
7eb4b1f1 BP |
2171 | /* Action structure for OFPAT12_SET_FIELD. */ |
2172 | struct ofp12_action_set_field { | |
2173 | ovs_be16 type; /* OFPAT12_SET_FIELD. */ | |
2174 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
2175 | ||
2176 | /* Followed by: | |
2177 | * - An OXM header, value, and (in OpenFlow 1.5+) optionally a mask. | |
2178 | * - Enough 0-bytes to pad out to a multiple of 64 bits. | |
2179 | * | |
2180 | * The "pad" member is the beginning of the above. */ | |
2181 | uint8_t pad[4]; | |
2182 | }; | |
2183 | OFP_ASSERT(sizeof(struct ofp12_action_set_field) == 8); | |
2184 | ||
c2d936a4 BP |
2185 | /* Action structure for NXAST_REG_LOAD. |
2186 | * | |
2187 | * Copies value[0:n_bits] to dst[ofs:ofs+n_bits], where a[b:c] denotes the bits | |
2188 | * within 'a' numbered 'b' through 'c' (not including bit 'c'). Bit numbering | |
2189 | * starts at 0 for the least-significant bit, 1 for the next most significant | |
2190 | * bit, and so on. | |
2191 | * | |
2192 | * 'dst' is an nxm_header with nxm_hasmask=0. See the documentation for | |
2193 | * NXAST_REG_MOVE, above, for the permitted fields and for the side effects of | |
2194 | * loading them. | |
2195 | * | |
2196 | * The 'ofs' and 'n_bits' fields are combined into a single 'ofs_nbits' field | |
2197 | * to avoid enlarging the structure by another 8 bytes. To allow 'n_bits' to | |
2198 | * take a value between 1 and 64 (inclusive) while taking up only 6 bits, it is | |
2199 | * also stored as one less than its true value: | |
2200 | * | |
2201 | * 15 6 5 0 | |
2202 | * +------------------------------+------------------+ | |
2203 | * | ofs | n_bits - 1 | | |
2204 | * +------------------------------+------------------+ | |
2205 | * | |
2206 | * The switch will reject actions for which ofs+n_bits is greater than the | |
2207 | * width of 'dst', or in which any bits in 'value' with value 2**n_bits or | |
2208 | * greater are set to 1, with error type OFPET_BAD_ACTION, code | |
2209 | * OFPBAC_BAD_ARGUMENT. | |
2210 | */ | |
2211 | struct nx_action_reg_load { | |
2212 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2213 | ovs_be16 len; /* Length is 24. */ | |
2214 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2215 | ovs_be16 subtype; /* NXAST_REG_LOAD. */ | |
2216 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
2217 | ovs_be32 dst; /* Destination register. */ | |
2218 | ovs_be64 value; /* Immediate value. */ | |
2219 | }; | |
2220 | OFP_ASSERT(sizeof(struct nx_action_reg_load) == 24); | |
b676167a | 2221 | |
bad8a439 BP |
2222 | /* Action structure for NXAST_REG_LOAD2. |
2223 | * | |
2224 | * Compared to OFPAT_SET_FIELD, we can use this to set whole or partial fields | |
2225 | * in any OpenFlow version. Compared to NXAST_REG_LOAD, we can use this to set | |
2226 | * OXM experimenter fields. */ | |
2227 | struct nx_action_reg_load2 { | |
2228 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2229 | ovs_be16 len; /* At least 16. */ | |
2230 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2231 | ovs_be16 subtype; /* NXAST_SET_FIELD. */ | |
2232 | ||
2233 | /* Followed by: | |
2234 | * - An NXM/OXM header, value, and optionally a mask. | |
2235 | * - Enough 0-bytes to pad out to a multiple of 64 bits. | |
2236 | * | |
2237 | * The "pad" member is the beginning of the above. */ | |
2238 | uint8_t pad[6]; | |
2239 | }; | |
2240 | OFP_ASSERT(sizeof(struct nx_action_reg_load2) == 16); | |
2241 | ||
c2d936a4 | 2242 | static enum ofperr |
7eb4b1f1 BP |
2243 | decode_ofpat_set_field(const struct ofp12_action_set_field *oasf, |
2244 | bool may_mask, struct ofpbuf *ofpacts) | |
7fdb60a7 | 2245 | { |
c2d936a4 | 2246 | struct ofpact_set_field *sf; |
178742f9 BP |
2247 | enum ofperr error; |
2248 | struct ofpbuf b; | |
7fdb60a7 | 2249 | |
178742f9 BP |
2250 | sf = ofpact_put_SET_FIELD(ofpacts); |
2251 | ||
2252 | ofpbuf_use_const(&b, oasf, ntohs(oasf->len)); | |
7eb4b1f1 BP |
2253 | ofpbuf_pull(&b, OBJECT_OFFSETOF(oasf, pad)); |
2254 | error = nx_pull_entry(&b, &sf->field, &sf->value, | |
2255 | may_mask ? &sf->mask : NULL); | |
178742f9 | 2256 | if (error) { |
178742f9 BP |
2257 | return (error == OFPERR_OFPBMC_BAD_MASK |
2258 | ? OFPERR_OFPBAC_BAD_SET_MASK | |
2259 | : error); | |
c2d936a4 | 2260 | } |
7eb4b1f1 BP |
2261 | if (!may_mask) { |
2262 | memset(&sf->mask, 0xff, sf->field->n_bytes); | |
2263 | } | |
178742f9 | 2264 | |
6fd6ed71 | 2265 | if (!is_all_zeros(b.data, b.size)) { |
c2d936a4 BP |
2266 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2267 | } | |
7fdb60a7 | 2268 | |
178742f9 BP |
2269 | /* OpenFlow says specifically that one may not set OXM_OF_IN_PORT via |
2270 | * Set-Field. */ | |
2271 | if (sf->field->id == MFF_IN_PORT_OXM) { | |
2272 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
c2d936a4 | 2273 | } |
178742f9 | 2274 | |
c2d936a4 | 2275 | /* oxm_length is now validated to be compatible with mf_value. */ |
178742f9 BP |
2276 | if (!sf->field->writable) { |
2277 | VLOG_WARN_RL(&rl, "destination field %s is not writable", | |
2278 | sf->field->name); | |
c2d936a4 BP |
2279 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2280 | } | |
c2d936a4 | 2281 | |
d3cb080e | 2282 | /* The value must be valid for match. OpenFlow 1.5 also says, |
7eb4b1f1 BP |
2283 | * "In an OXM_OF_VLAN_VID set-field action, the OFPVID_PRESENT bit must be |
2284 | * a 1-bit in oxm_value and in oxm_mask." */ | |
178742f9 BP |
2285 | if (!mf_is_value_valid(sf->field, &sf->value) |
2286 | || (sf->field->id == MFF_VLAN_VID | |
31c9ed6c BP |
2287 | && (!(sf->mask.be16 & htons(OFPVID12_PRESENT)) |
2288 | || !(sf->value.be16 & htons(OFPVID12_PRESENT))))) { | |
c2d936a4 | 2289 | struct ds ds = DS_EMPTY_INITIALIZER; |
178742f9 | 2290 | mf_format(sf->field, &sf->value, NULL, &ds); |
c2d936a4 | 2291 | VLOG_WARN_RL(&rl, "Invalid value for set field %s: %s", |
178742f9 | 2292 | sf->field->name, ds_cstr(&ds)); |
c2d936a4 BP |
2293 | ds_destroy(&ds); |
2294 | ||
2295 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
7fdb60a7 | 2296 | } |
c2d936a4 | 2297 | return 0; |
7fdb60a7 SH |
2298 | } |
2299 | ||
7eb4b1f1 BP |
2300 | static enum ofperr |
2301 | decode_OFPAT_RAW12_SET_FIELD(const struct ofp12_action_set_field *oasf, | |
f3cd3ac7 | 2302 | enum ofp_version ofp_version OVS_UNUSED, |
7eb4b1f1 BP |
2303 | struct ofpbuf *ofpacts) |
2304 | { | |
2305 | return decode_ofpat_set_field(oasf, false, ofpacts); | |
2306 | } | |
2307 | ||
2308 | static enum ofperr | |
2309 | decode_OFPAT_RAW15_SET_FIELD(const struct ofp12_action_set_field *oasf, | |
f3cd3ac7 | 2310 | enum ofp_version ofp_version OVS_UNUSED, |
7eb4b1f1 BP |
2311 | struct ofpbuf *ofpacts) |
2312 | { | |
2313 | return decode_ofpat_set_field(oasf, true, ofpacts); | |
2314 | } | |
2315 | ||
2316 | static enum ofperr | |
2317 | decode_NXAST_RAW_REG_LOAD(const struct nx_action_reg_load *narl, | |
f3cd3ac7 | 2318 | enum ofp_version ofp_version OVS_UNUSED, |
7eb4b1f1 BP |
2319 | struct ofpbuf *out) |
2320 | { | |
2321 | struct ofpact_set_field *sf = ofpact_put_reg_load(out); | |
2322 | struct mf_subfield dst; | |
2323 | enum ofperr error; | |
2324 | ||
2325 | sf->ofpact.raw = NXAST_RAW_REG_LOAD; | |
2326 | ||
2327 | dst.field = mf_from_nxm_header(ntohl(narl->dst)); | |
2328 | dst.ofs = nxm_decode_ofs(narl->ofs_nbits); | |
2329 | dst.n_bits = nxm_decode_n_bits(narl->ofs_nbits); | |
2330 | error = mf_check_dst(&dst, NULL); | |
2331 | if (error) { | |
2332 | return error; | |
2333 | } | |
2334 | ||
2335 | /* Reject 'narl' if a bit numbered 'n_bits' or higher is set to 1 in | |
2336 | * narl->value. */ | |
2337 | if (dst.n_bits < 64 && ntohll(narl->value) >> dst.n_bits) { | |
2338 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
2339 | } | |
2340 | ||
2341 | sf->field = dst.field; | |
2342 | bitwise_put(ntohll(narl->value), | |
2343 | &sf->value, dst.field->n_bytes, dst.ofs, | |
2344 | dst.n_bits); | |
2345 | bitwise_put(UINT64_MAX, | |
2346 | &sf->mask, dst.field->n_bytes, dst.ofs, | |
2347 | dst.n_bits); | |
2348 | ||
2349 | return 0; | |
2350 | } | |
2351 | ||
bad8a439 BP |
2352 | static enum ofperr |
2353 | decode_NXAST_RAW_REG_LOAD2(const struct nx_action_reg_load2 *narl, | |
f3cd3ac7 | 2354 | enum ofp_version ofp_version OVS_UNUSED, |
bad8a439 BP |
2355 | struct ofpbuf *out) |
2356 | { | |
2357 | struct ofpact_set_field *sf; | |
2358 | enum ofperr error; | |
2359 | struct ofpbuf b; | |
2360 | ||
2361 | sf = ofpact_put_SET_FIELD(out); | |
2362 | sf->ofpact.raw = NXAST_RAW_REG_LOAD2; | |
2363 | ||
2364 | ofpbuf_use_const(&b, narl, ntohs(narl->len)); | |
2365 | ofpbuf_pull(&b, OBJECT_OFFSETOF(narl, pad)); | |
2366 | error = nx_pull_entry(&b, &sf->field, &sf->value, &sf->mask); | |
2367 | if (error) { | |
2368 | return error; | |
2369 | } | |
6fd6ed71 | 2370 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2371 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2372 | } | |
2373 | ||
2374 | if (!sf->field->writable) { | |
2375 | VLOG_WARN_RL(&rl, "destination field %s is not writable", | |
2376 | sf->field->name); | |
2377 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
2378 | } | |
2379 | return 0; | |
2380 | } | |
2381 | ||
7fdb60a7 | 2382 | static void |
c2d936a4 | 2383 | ofpact_put_set_field(struct ofpbuf *openflow, enum ofp_version ofp_version, |
178742f9 | 2384 | enum mf_field_id field, uint64_t value_) |
7fdb60a7 | 2385 | { |
7eb4b1f1 | 2386 | struct ofp12_action_set_field *oasf OVS_UNUSED; |
178742f9 | 2387 | int n_bytes = mf_from_id(field)->n_bytes; |
6fd6ed71 | 2388 | size_t start_ofs = openflow->size; |
178742f9 | 2389 | union mf_value value; |
7fdb60a7 | 2390 | |
178742f9 | 2391 | value.be64 = htonll(value_ << (8 * (8 - n_bytes))); |
7fdb60a7 | 2392 | |
7eb4b1f1 | 2393 | oasf = put_OFPAT12_SET_FIELD(openflow); |
6fd6ed71 | 2394 | openflow->size = openflow->size - sizeof oasf->pad; |
178742f9 BP |
2395 | nx_put_entry(openflow, field, ofp_version, &value, NULL); |
2396 | pad_ofpat(openflow, start_ofs); | |
7fdb60a7 SH |
2397 | } |
2398 | ||
7eb4b1f1 BP |
2399 | static bool |
2400 | next_load_segment(const struct ofpact_set_field *sf, | |
2401 | struct mf_subfield *dst, uint64_t *value) | |
2402 | { | |
fa078489 BP |
2403 | int n_bits = sf->field->n_bits; |
2404 | int n_bytes = sf->field->n_bytes; | |
7eb4b1f1 BP |
2405 | int start = dst->ofs + dst->n_bits; |
2406 | ||
fa078489 | 2407 | if (start < n_bits) { |
7eb4b1f1 | 2408 | dst->field = sf->field; |
fa078489 BP |
2409 | dst->ofs = bitwise_scan(&sf->mask, n_bytes, 1, start, n_bits); |
2410 | if (dst->ofs < n_bits) { | |
2411 | dst->n_bits = bitwise_scan(&sf->mask, n_bytes, 0, dst->ofs + 1, | |
2412 | MIN(dst->ofs + 64, n_bits)) - dst->ofs; | |
2413 | *value = bitwise_get(&sf->value, n_bytes, dst->ofs, dst->n_bits); | |
7eb4b1f1 BP |
2414 | return true; |
2415 | } | |
2416 | } | |
2417 | return false; | |
2418 | } | |
178742f9 | 2419 | |
7eb4b1f1 | 2420 | /* Convert 'sf' to a series of REG_LOADs. */ |
7fdb60a7 | 2421 | static void |
c2d936a4 | 2422 | set_field_to_nxast(const struct ofpact_set_field *sf, struct ofpbuf *openflow) |
7fdb60a7 | 2423 | { |
bad8a439 | 2424 | /* If 'sf' cannot be encoded as NXAST_REG_LOAD because it requires an |
4fe04a7e JG |
2425 | * experimenter OXM or is variable length (or if it came in as |
2426 | * NXAST_REG_LOAD2), encode as NXAST_REG_LOAD2. Otherwise use | |
2427 | * NXAST_REG_LOAD, which is backward compatible. */ | |
bad8a439 | 2428 | if (sf->ofpact.raw == NXAST_RAW_REG_LOAD2 |
4fe04a7e | 2429 | || !mf_nxm_header(sf->field->id) || sf->field->variable_len) { |
bad8a439 | 2430 | struct nx_action_reg_load2 *narl OVS_UNUSED; |
6fd6ed71 | 2431 | size_t start_ofs = openflow->size; |
bad8a439 BP |
2432 | |
2433 | narl = put_NXAST_REG_LOAD2(openflow); | |
6fd6ed71 | 2434 | openflow->size = openflow->size - sizeof narl->pad; |
bad8a439 BP |
2435 | nx_put_entry(openflow, sf->field->id, 0, &sf->value, &sf->mask); |
2436 | pad_ofpat(openflow, start_ofs); | |
2437 | } else { | |
2438 | struct mf_subfield dst; | |
2439 | uint64_t value; | |
7eb4b1f1 | 2440 | |
bad8a439 BP |
2441 | dst.ofs = dst.n_bits = 0; |
2442 | while (next_load_segment(sf, &dst, &value)) { | |
2443 | struct nx_action_reg_load *narl = put_NXAST_REG_LOAD(openflow); | |
2444 | narl->ofs_nbits = nxm_encode_ofs_nbits(dst.ofs, dst.n_bits); | |
2445 | narl->dst = htonl(mf_nxm_header(dst.field->id)); | |
2446 | narl->value = htonll(value); | |
2447 | } | |
7fdb60a7 SH |
2448 | } |
2449 | } | |
2450 | ||
7eb4b1f1 BP |
2451 | /* Convert 'sf', which must set an entire field, to standard OpenFlow 1.0/1.1 |
2452 | * actions, if we can, falling back to Nicira extensions if we must. | |
7fdb60a7 | 2453 | * |
c2d936a4 BP |
2454 | * We check only meta-flow types that can appear within set field actions and |
2455 | * that have a mapping to compatible action types. These struct mf_field | |
2456 | * definitions have a defined OXM or NXM header value and specify the field as | |
2457 | * writable. */ | |
2458 | static void | |
2459 | set_field_to_legacy_openflow(const struct ofpact_set_field *sf, | |
2460 | enum ofp_version ofp_version, | |
2461 | struct ofpbuf *out) | |
7fdb60a7 | 2462 | { |
c2d936a4 BP |
2463 | switch ((int) sf->field->id) { |
2464 | case MFF_VLAN_TCI: { | |
2465 | ovs_be16 tci = sf->value.be16; | |
2466 | bool cfi = (tci & htons(VLAN_CFI)) != 0; | |
2467 | uint16_t vid = vlan_tci_to_vid(tci); | |
2468 | uint8_t pcp = vlan_tci_to_pcp(tci); | |
2469 | ||
2470 | if (ofp_version < OFP11_VERSION) { | |
2471 | /* NXM_OF_VLAN_TCI to OpenFlow 1.0 mapping: | |
2472 | * | |
2473 | * If CFI=1, Add or modify VLAN VID & PCP. | |
2474 | * If CFI=0, strip VLAN header, if any. | |
2475 | */ | |
2476 | if (cfi) { | |
2477 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
2478 | put_OFPAT10_SET_VLAN_PCP(out, pcp); | |
2479 | } else { | |
2480 | put_OFPAT10_STRIP_VLAN(out); | |
2481 | } | |
2482 | } else { | |
2483 | /* NXM_OF_VLAN_TCI to OpenFlow 1.1 mapping: | |
2484 | * | |
2485 | * If CFI=1, Add or modify VLAN VID & PCP. | |
2486 | * OpenFlow 1.1 set actions only apply if the packet | |
2487 | * already has VLAN tags. To be sure that is the case | |
2488 | * we have to push a VLAN header. As we do not support | |
2489 | * multiple layers of VLANs, this is a no-op, if a VLAN | |
2490 | * header already exists. This may backfire, however, | |
2491 | * when we start supporting multiple layers of VLANs. | |
2492 | * If CFI=0, strip VLAN header, if any. | |
2493 | */ | |
2494 | if (cfi) { | |
2495 | /* Push a VLAN tag, if one was not seen at action validation | |
2496 | * time. */ | |
2497 | if (!sf->flow_has_vlan) { | |
2498 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
2499 | } | |
2500 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
2501 | put_OFPAT11_SET_VLAN_PCP(out, pcp); | |
2502 | } else { | |
2503 | /* If the flow did not match on vlan, we have no way of | |
2504 | * knowing if the vlan tag exists, so we must POP just to be | |
2505 | * sure. */ | |
2506 | put_OFPAT11_POP_VLAN(out); | |
2507 | } | |
2508 | } | |
2509 | break; | |
2510 | } | |
7fdb60a7 | 2511 | |
c2d936a4 BP |
2512 | case MFF_VLAN_VID: { |
2513 | uint16_t vid = ntohs(sf->value.be16) & VLAN_VID_MASK; | |
2514 | if (ofp_version == OFP10_VERSION) { | |
2515 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
2516 | } else { | |
2517 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
2518 | } | |
2519 | break; | |
2520 | } | |
2521 | ||
2522 | case MFF_VLAN_PCP: | |
2523 | if (ofp_version == OFP10_VERSION) { | |
2524 | put_OFPAT10_SET_VLAN_PCP(out, sf->value.u8); | |
2525 | } else { | |
2526 | put_OFPAT11_SET_VLAN_PCP(out, sf->value.u8); | |
2527 | } | |
2528 | break; | |
2529 | ||
2530 | case MFF_ETH_SRC: | |
74ff3298 | 2531 | put_OFPAT_SET_DL_SRC(out, ofp_version)->dl_addr = sf->value.mac; |
c2d936a4 BP |
2532 | break; |
2533 | ||
2534 | case MFF_ETH_DST: | |
74ff3298 | 2535 | put_OFPAT_SET_DL_DST(out, ofp_version)->dl_addr = sf->value.mac; |
c2d936a4 BP |
2536 | break; |
2537 | ||
2538 | case MFF_IPV4_SRC: | |
2539 | put_OFPAT_SET_NW_SRC(out, ofp_version, sf->value.be32); | |
2540 | break; | |
2541 | ||
2542 | case MFF_IPV4_DST: | |
2543 | put_OFPAT_SET_NW_DST(out, ofp_version, sf->value.be32); | |
2544 | break; | |
2545 | ||
2546 | case MFF_IP_DSCP: | |
2547 | put_OFPAT_SET_NW_TOS(out, ofp_version, sf->value.u8); | |
2548 | break; | |
2549 | ||
2550 | case MFF_IP_DSCP_SHIFTED: | |
2551 | put_OFPAT_SET_NW_TOS(out, ofp_version, sf->value.u8 << 2); | |
2552 | break; | |
2553 | ||
2554 | case MFF_TCP_SRC: | |
2555 | case MFF_UDP_SRC: | |
2556 | put_OFPAT_SET_TP_SRC(out, sf->value.be16); | |
2557 | break; | |
2558 | ||
2559 | case MFF_TCP_DST: | |
2560 | case MFF_UDP_DST: | |
2561 | put_OFPAT_SET_TP_DST(out, sf->value.be16); | |
2562 | break; | |
2563 | ||
2564 | default: | |
2565 | set_field_to_nxast(sf, out); | |
2566 | break; | |
7fdb60a7 SH |
2567 | } |
2568 | } | |
2569 | ||
7eb4b1f1 BP |
2570 | static void |
2571 | set_field_to_set_field(const struct ofpact_set_field *sf, | |
2572 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2573 | { | |
2574 | struct ofp12_action_set_field *oasf OVS_UNUSED; | |
6fd6ed71 | 2575 | size_t start_ofs = out->size; |
7eb4b1f1 BP |
2576 | |
2577 | oasf = put_OFPAT12_SET_FIELD(out); | |
6fd6ed71 | 2578 | out->size = out->size - sizeof oasf->pad; |
7eb4b1f1 BP |
2579 | nx_put_entry(out, sf->field->id, ofp_version, &sf->value, &sf->mask); |
2580 | pad_ofpat(out, start_ofs); | |
2581 | } | |
2582 | ||
c2d936a4 BP |
2583 | static void |
2584 | encode_SET_FIELD(const struct ofpact_set_field *sf, | |
2585 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2586 | { | |
7eb4b1f1 | 2587 | if (ofp_version >= OFP15_VERSION) { |
bad8a439 BP |
2588 | /* OF1.5+ only has Set-Field (reg_load is redundant so we drop it |
2589 | * entirely). */ | |
7eb4b1f1 | 2590 | set_field_to_set_field(sf, ofp_version, out); |
bad8a439 BP |
2591 | } else if (sf->ofpact.raw == NXAST_RAW_REG_LOAD || |
2592 | sf->ofpact.raw == NXAST_RAW_REG_LOAD2) { | |
2593 | /* It came in as reg_load, send it out the same way. */ | |
7eb4b1f1 BP |
2594 | set_field_to_nxast(sf, out); |
2595 | } else if (ofp_version < OFP12_VERSION) { | |
2596 | /* OpenFlow 1.0 and 1.1 don't have Set-Field. */ | |
c2d936a4 | 2597 | set_field_to_legacy_openflow(sf, ofp_version, out); |
7eb4b1f1 BP |
2598 | } else if (is_all_ones((const uint8_t *) &sf->mask, sf->field->n_bytes)) { |
2599 | /* We're encoding to OpenFlow 1.2, 1.3, or 1.4. The action sets an | |
2600 | * entire field, so encode it as OFPAT_SET_FIELD. */ | |
2601 | set_field_to_set_field(sf, ofp_version, out); | |
c2d936a4 | 2602 | } else { |
7eb4b1f1 BP |
2603 | /* We're encoding to OpenFlow 1.2, 1.3, or 1.4. The action cannot be |
2604 | * encoded as OFPAT_SET_FIELD because it does not set an entire field, | |
2605 | * so encode it as reg_load. */ | |
2606 | set_field_to_nxast(sf, out); | |
c2d936a4 BP |
2607 | } |
2608 | } | |
2609 | ||
36b43aa6 JS |
2610 | /* Parses the input argument 'arg' into the key, value, and delimiter |
2611 | * components that are common across the reg_load and set_field action format. | |
2612 | * | |
2613 | * With an argument like "1->metadata", sets the following pointers to | |
2614 | * point within 'arg': | |
2615 | * key: "metadata" | |
2616 | * value: "1" | |
2617 | * delim: "->" | |
2618 | * | |
2619 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2620 | * error. The caller is responsible for freeing the returned string. */ | |
2621 | static char * OVS_WARN_UNUSED_RESULT | |
2622 | set_field_split_str(char *arg, char **key, char **value, char **delim) | |
2623 | { | |
2624 | char *value_end; | |
2625 | ||
2626 | *value = arg; | |
2627 | value_end = strstr(arg, "->"); | |
2628 | *key = value_end + strlen("->"); | |
2629 | if (delim) { | |
2630 | *delim = value_end; | |
2631 | } | |
2632 | ||
2633 | if (!value_end) { | |
2634 | return xasprintf("%s: missing `->'", arg); | |
2635 | } | |
2636 | if (strlen(value_end) <= strlen("->")) { | |
2637 | return xasprintf("%s: missing field name following `->'", arg); | |
2638 | } | |
2639 | ||
2640 | return NULL; | |
2641 | } | |
2642 | ||
c2d936a4 BP |
2643 | /* Parses a "set_field" action with argument 'arg', appending the parsed |
2644 | * action to 'ofpacts'. | |
2645 | * | |
2646 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2647 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 2648 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2649 | set_field_parse__(char *arg, struct ofpbuf *ofpacts, |
2650 | enum ofputil_protocol *usable_protocols) | |
7fdb60a7 | 2651 | { |
c2d936a4 BP |
2652 | struct ofpact_set_field *sf = ofpact_put_SET_FIELD(ofpacts); |
2653 | char *value; | |
2654 | char *delim; | |
2655 | char *key; | |
2656 | const struct mf_field *mf; | |
2657 | char *error; | |
7fdb60a7 | 2658 | |
36b43aa6 JS |
2659 | error = set_field_split_str(arg, &key, &value, &delim); |
2660 | if (error) { | |
2661 | return error; | |
c2d936a4 | 2662 | } |
e3f8f887 | 2663 | |
c2d936a4 BP |
2664 | mf = mf_from_name(key); |
2665 | if (!mf) { | |
2666 | return xasprintf("%s is not a valid OXM field name", key); | |
2667 | } | |
2668 | if (!mf->writable) { | |
2669 | return xasprintf("%s is read-only", key); | |
2670 | } | |
2671 | sf->field = mf; | |
2672 | delim[0] = '\0'; | |
7eb4b1f1 | 2673 | error = mf_parse(mf, value, &sf->value, &sf->mask); |
7fdb60a7 SH |
2674 | if (error) { |
2675 | return error; | |
2676 | } | |
2677 | ||
c2d936a4 BP |
2678 | if (!mf_is_value_valid(mf, &sf->value)) { |
2679 | return xasprintf("%s is not a valid value for field %s", value, key); | |
7fdb60a7 SH |
2680 | } |
2681 | ||
a4ce8b25 | 2682 | *usable_protocols &= mf->usable_protocols_exact; |
c2d936a4 | 2683 | return NULL; |
7fdb60a7 SH |
2684 | } |
2685 | ||
c2d936a4 BP |
2686 | /* Parses 'arg' as the argument to a "set_field" action, and appends such an |
2687 | * action to 'ofpacts'. | |
2688 | * | |
2689 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2690 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 2691 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2692 | parse_SET_FIELD(const char *arg, struct ofpbuf *ofpacts, |
2693 | enum ofputil_protocol *usable_protocols) | |
2694 | { | |
2695 | char *copy = xstrdup(arg); | |
2696 | char *error = set_field_parse__(copy, ofpacts, usable_protocols); | |
2697 | free(copy); | |
2698 | return error; | |
2699 | } | |
a359d5ad | 2700 | |
cab50449 | 2701 | static char * OVS_WARN_UNUSED_RESULT |
7eb4b1f1 BP |
2702 | parse_reg_load(char *arg, struct ofpbuf *ofpacts) |
2703 | { | |
2704 | struct ofpact_set_field *sf = ofpact_put_reg_load(ofpacts); | |
7eb4b1f1 | 2705 | struct mf_subfield dst; |
36b43aa6 | 2706 | char *key, *value_str; |
81270993 | 2707 | union mf_value value; |
7eb4b1f1 BP |
2708 | char *error; |
2709 | ||
36b43aa6 JS |
2710 | error = set_field_split_str(arg, &key, &value_str, NULL); |
2711 | if (error) { | |
2712 | return error; | |
7eb4b1f1 | 2713 | } |
36b43aa6 JS |
2714 | |
2715 | error = mf_parse_subfield(&dst, key); | |
7eb4b1f1 BP |
2716 | if (error) { |
2717 | return error; | |
2718 | } | |
2719 | ||
81270993 JS |
2720 | if (parse_int_string(value_str, (uint8_t *)&value, dst.field->n_bytes, |
2721 | &key)) { | |
2722 | return xasprintf("%s: cannot parse integer value", arg); | |
2723 | } | |
2724 | ||
2725 | if (!bitwise_is_all_zeros(&value, dst.field->n_bytes, dst.n_bits, | |
2726 | dst.field->n_bytes * 8 - dst.n_bits)) { | |
2727 | struct ds ds; | |
2728 | ||
2729 | ds_init(&ds); | |
2730 | mf_format(dst.field, &value, NULL, &ds); | |
2731 | error = xasprintf("%s: value %s does not fit into %d bits", | |
2732 | arg, ds_cstr(&ds), dst.n_bits); | |
2733 | ds_destroy(&ds); | |
2734 | return error; | |
7eb4b1f1 BP |
2735 | } |
2736 | ||
2737 | sf->field = dst.field; | |
2738 | memset(&sf->value, 0, sizeof sf->value); | |
81270993 JS |
2739 | bitwise_copy(&value, dst.field->n_bytes, 0, &sf->value, |
2740 | dst.field->n_bytes, dst.ofs, dst.n_bits); | |
2741 | bitwise_one(&sf->mask, dst.field->n_bytes, dst.ofs, dst.n_bits); | |
2742 | ||
7eb4b1f1 BP |
2743 | return NULL; |
2744 | } | |
2745 | ||
c2d936a4 BP |
2746 | static void |
2747 | format_SET_FIELD(const struct ofpact_set_field *a, struct ds *s) | |
2748 | { | |
7eb4b1f1 BP |
2749 | if (a->ofpact.raw == NXAST_RAW_REG_LOAD) { |
2750 | struct mf_subfield dst; | |
2751 | uint64_t value; | |
2752 | ||
2753 | dst.ofs = dst.n_bits = 0; | |
2754 | while (next_load_segment(a, &dst, &value)) { | |
2755 | ds_put_format(s, "load:%#"PRIx64"->", value); | |
2756 | mf_format_subfield(&dst, s); | |
2757 | ds_put_char(s, ','); | |
2758 | } | |
2759 | ds_chomp(s, ','); | |
2760 | } else { | |
2761 | ds_put_cstr(s, "set_field:"); | |
2762 | mf_format(a->field, &a->value, &a->mask, s); | |
2763 | ds_put_format(s, "->%s", a->field->name); | |
2764 | } | |
2765 | } | |
2766 | ||
2767 | /* Appends an OFPACT_SET_FIELD ofpact to 'ofpacts' and returns it. The ofpact | |
2768 | * is marked such that, if possible, it will be translated to OpenFlow as | |
2769 | * NXAST_REG_LOAD extension actions rather than OFPAT_SET_FIELD, either because | |
2770 | * that was the way that the action was expressed when it came into OVS or for | |
2771 | * backward compatibility. */ | |
2772 | struct ofpact_set_field * | |
2773 | ofpact_put_reg_load(struct ofpbuf *ofpacts) | |
2774 | { | |
2775 | struct ofpact_set_field *sf = ofpact_put_SET_FIELD(ofpacts); | |
2776 | sf->ofpact.raw = NXAST_RAW_REG_LOAD; | |
2777 | return sf; | |
c2d936a4 BP |
2778 | } |
2779 | \f | |
2780 | /* Action structure for NXAST_STACK_PUSH and NXAST_STACK_POP. | |
2781 | * | |
2782 | * Pushes (or pops) field[offset: offset + n_bits] to (or from) | |
2783 | * top of the stack. | |
2784 | */ | |
2785 | struct nx_action_stack { | |
2786 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2787 | ovs_be16 len; /* Length is 16. */ | |
2788 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2789 | ovs_be16 subtype; /* NXAST_STACK_PUSH or NXAST_STACK_POP. */ | |
2790 | ovs_be16 offset; /* Bit offset into the field. */ | |
bad8a439 BP |
2791 | /* Followed by: |
2792 | * - OXM/NXM header for field to push or pop (4 or 8 bytes). | |
2793 | * - ovs_be16 'n_bits', the number of bits to extract from the field. | |
2794 | * - Enough 0-bytes to pad out the action to 24 bytes. */ | |
2795 | uint8_t pad[12]; /* See above. */ | |
a359d5ad | 2796 | }; |
c2d936a4 | 2797 | OFP_ASSERT(sizeof(struct nx_action_stack) == 24); |
a359d5ad | 2798 | |
bad8a439 | 2799 | static enum ofperr |
c2d936a4 BP |
2800 | decode_stack_action(const struct nx_action_stack *nasp, |
2801 | struct ofpact_stack *stack_action) | |
a359d5ad | 2802 | { |
bad8a439 BP |
2803 | enum ofperr error; |
2804 | struct ofpbuf b; | |
2805 | ||
c2d936a4 | 2806 | stack_action->subfield.ofs = ntohs(nasp->offset); |
bad8a439 BP |
2807 | |
2808 | ofpbuf_use_const(&b, nasp, sizeof *nasp); | |
2809 | ofpbuf_pull(&b, OBJECT_OFFSETOF(nasp, pad)); | |
2810 | error = nx_pull_header(&b, &stack_action->subfield.field, NULL); | |
2811 | if (error) { | |
2812 | return error; | |
2813 | } | |
6fd6ed71 | 2814 | stack_action->subfield.n_bits = ntohs(*(const ovs_be16 *) b.data); |
bad8a439 | 2815 | ofpbuf_pull(&b, 2); |
6fd6ed71 | 2816 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2817 | return OFPERR_NXBRC_MUST_BE_ZERO; |
2818 | } | |
2819 | ||
2820 | return 0; | |
a359d5ad IY |
2821 | } |
2822 | ||
c2d936a4 BP |
2823 | static enum ofperr |
2824 | decode_NXAST_RAW_STACK_PUSH(const struct nx_action_stack *nasp, | |
f3cd3ac7 JS |
2825 | enum ofp_version ofp_version OVS_UNUSED, |
2826 | struct ofpbuf *ofpacts) | |
a359d5ad | 2827 | { |
c2d936a4 | 2828 | struct ofpact_stack *push = ofpact_put_STACK_PUSH(ofpacts); |
bad8a439 BP |
2829 | enum ofperr error = decode_stack_action(nasp, push); |
2830 | return error ? error : nxm_stack_push_check(push, NULL); | |
a359d5ad IY |
2831 | } |
2832 | ||
c2d936a4 BP |
2833 | static enum ofperr |
2834 | decode_NXAST_RAW_STACK_POP(const struct nx_action_stack *nasp, | |
f3cd3ac7 | 2835 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 2836 | struct ofpbuf *ofpacts) |
084c53de | 2837 | { |
c2d936a4 | 2838 | struct ofpact_stack *pop = ofpact_put_STACK_POP(ofpacts); |
bad8a439 BP |
2839 | enum ofperr error = decode_stack_action(nasp, pop); |
2840 | return error ? error : nxm_stack_pop_check(pop, NULL); | |
084c53de BP |
2841 | } |
2842 | ||
c2d936a4 BP |
2843 | static void |
2844 | encode_STACK_op(const struct ofpact_stack *stack_action, | |
2845 | struct nx_action_stack *nasp) | |
c0621c39 | 2846 | { |
bad8a439 BP |
2847 | struct ofpbuf b; |
2848 | ovs_be16 n_bits; | |
2849 | ||
c2d936a4 | 2850 | nasp->offset = htons(stack_action->subfield.ofs); |
bad8a439 BP |
2851 | |
2852 | ofpbuf_use_stack(&b, nasp, ntohs(nasp->len)); | |
2853 | ofpbuf_put_uninit(&b, OBJECT_OFFSETOF(nasp, pad)); | |
2854 | nx_put_header(&b, stack_action->subfield.field->id, 0, false); | |
2855 | n_bits = htons(stack_action->subfield.n_bits); | |
2856 | ofpbuf_put(&b, &n_bits, sizeof n_bits); | |
c0621c39 AW |
2857 | } |
2858 | ||
c2d936a4 BP |
2859 | static void |
2860 | encode_STACK_PUSH(const struct ofpact_stack *stack, | |
2861 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
2862 | { | |
2863 | encode_STACK_op(stack, put_NXAST_STACK_PUSH(out)); | |
2864 | } | |
8e97815e | 2865 | |
c2d936a4 BP |
2866 | static void |
2867 | encode_STACK_POP(const struct ofpact_stack *stack, | |
2868 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
8e97815e | 2869 | { |
c2d936a4 BP |
2870 | encode_STACK_op(stack, put_NXAST_STACK_POP(out)); |
2871 | } | |
8e97815e | 2872 | |
cab50449 | 2873 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2874 | parse_STACK_PUSH(char *arg, struct ofpbuf *ofpacts, |
2875 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2876 | { | |
2877 | return nxm_parse_stack_action(ofpact_put_STACK_PUSH(ofpacts), arg); | |
2878 | } | |
8e97815e | 2879 | |
cab50449 | 2880 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2881 | parse_STACK_POP(char *arg, struct ofpbuf *ofpacts, |
2882 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2883 | { | |
2884 | return nxm_parse_stack_action(ofpact_put_STACK_POP(ofpacts), arg); | |
8e97815e BP |
2885 | } |
2886 | ||
c2d936a4 BP |
2887 | static void |
2888 | format_STACK_PUSH(const struct ofpact_stack *a, struct ds *s) | |
8e97815e | 2889 | { |
c2d936a4 BP |
2890 | nxm_format_stack_push(a, s); |
2891 | } | |
8e97815e | 2892 | |
c2d936a4 BP |
2893 | static void |
2894 | format_STACK_POP(const struct ofpact_stack *a, struct ds *s) | |
2895 | { | |
2896 | nxm_format_stack_pop(a, s); | |
2897 | } | |
2898 | \f | |
2899 | /* Action structure for NXAST_DEC_TTL_CNT_IDS. | |
2900 | * | |
2901 | * If the packet is not IPv4 or IPv6, does nothing. For IPv4 or IPv6, if the | |
2902 | * TTL or hop limit is at least 2, decrements it by 1. Otherwise, if TTL or | |
2903 | * hop limit is 0 or 1, sends a packet-in to the controllers with each of the | |
2904 | * 'n_controllers' controller IDs specified in 'cnt_ids'. | |
2905 | * | |
2906 | * (This differs from NXAST_DEC_TTL in that for NXAST_DEC_TTL the packet-in is | |
2907 | * sent only to controllers with id 0.) | |
2908 | */ | |
2909 | struct nx_action_cnt_ids { | |
2910 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2911 | ovs_be16 len; /* Length including slaves. */ | |
2912 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2913 | ovs_be16 subtype; /* NXAST_DEC_TTL_CNT_IDS. */ | |
2914 | ||
2915 | ovs_be16 n_controllers; /* Number of controllers. */ | |
2916 | uint8_t zeros[4]; /* Must be zero. */ | |
2917 | ||
2918 | /* Followed by 1 or more controller ids. | |
2919 | * | |
2920 | * uint16_t cnt_ids[]; // Controller ids. | |
2921 | * uint8_t pad[]; // Must be 0 to 8-byte align cnt_ids[]. | |
2922 | */ | |
2923 | }; | |
2924 | OFP_ASSERT(sizeof(struct nx_action_cnt_ids) == 16); | |
2925 | ||
2926 | static enum ofperr | |
2927 | decode_OFPAT_RAW_DEC_NW_TTL(struct ofpbuf *out) | |
2928 | { | |
2929 | uint16_t id = 0; | |
2930 | struct ofpact_cnt_ids *ids; | |
2931 | enum ofperr error = 0; | |
2932 | ||
2933 | ids = ofpact_put_DEC_TTL(out); | |
2934 | ids->n_controllers = 1; | |
2935 | ofpbuf_put(out, &id, sizeof id); | |
6fd6ed71 | 2936 | ids = out->header; |
c2d936a4 BP |
2937 | ofpact_update_len(out, &ids->ofpact); |
2938 | return error; | |
2939 | } | |
2940 | ||
2941 | static enum ofperr | |
2942 | decode_NXAST_RAW_DEC_TTL_CNT_IDS(const struct nx_action_cnt_ids *nac_ids, | |
f3cd3ac7 | 2943 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
2944 | struct ofpbuf *out) |
2945 | { | |
2946 | struct ofpact_cnt_ids *ids; | |
2947 | size_t ids_size; | |
2948 | int i; | |
2949 | ||
2950 | ids = ofpact_put_DEC_TTL(out); | |
2951 | ids->ofpact.raw = NXAST_RAW_DEC_TTL_CNT_IDS; | |
2952 | ids->n_controllers = ntohs(nac_ids->n_controllers); | |
2953 | ids_size = ntohs(nac_ids->len) - sizeof *nac_ids; | |
2954 | ||
2955 | if (!is_all_zeros(nac_ids->zeros, sizeof nac_ids->zeros)) { | |
2956 | return OFPERR_NXBRC_MUST_BE_ZERO; | |
8e97815e | 2957 | } |
c2d936a4 BP |
2958 | |
2959 | if (ids_size < ids->n_controllers * sizeof(ovs_be16)) { | |
2960 | VLOG_WARN_RL(&rl, "Nicira action dec_ttl_cnt_ids only has %"PRIuSIZE" " | |
2961 | "bytes allocated for controller ids. %"PRIuSIZE" bytes " | |
2962 | "are required for %"PRIu16" controllers.", | |
2963 | ids_size, ids->n_controllers * sizeof(ovs_be16), | |
2964 | ids->n_controllers); | |
2965 | return OFPERR_OFPBAC_BAD_LEN; | |
2966 | } | |
2967 | ||
2968 | for (i = 0; i < ids->n_controllers; i++) { | |
2969 | uint16_t id = ntohs(((ovs_be16 *)(nac_ids + 1))[i]); | |
2970 | ofpbuf_put(out, &id, sizeof id); | |
6fd6ed71 | 2971 | ids = out->header; |
c2d936a4 BP |
2972 | } |
2973 | ||
2974 | ofpact_update_len(out, &ids->ofpact); | |
2975 | ||
2976 | return 0; | |
8e97815e BP |
2977 | } |
2978 | ||
c2d936a4 BP |
2979 | static void |
2980 | encode_DEC_TTL(const struct ofpact_cnt_ids *dec_ttl, | |
2981 | enum ofp_version ofp_version, struct ofpbuf *out) | |
8e97815e | 2982 | { |
c2d936a4 BP |
2983 | if (dec_ttl->ofpact.raw == NXAST_RAW_DEC_TTL_CNT_IDS |
2984 | || dec_ttl->n_controllers != 1 | |
2985 | || dec_ttl->cnt_ids[0] != 0) { | |
2986 | struct nx_action_cnt_ids *nac_ids = put_NXAST_DEC_TTL_CNT_IDS(out); | |
2987 | int ids_len = ROUND_UP(2 * dec_ttl->n_controllers, OFP_ACTION_ALIGN); | |
2988 | ovs_be16 *ids; | |
2989 | size_t i; | |
8e97815e | 2990 | |
c2d936a4 BP |
2991 | nac_ids->len = htons(ntohs(nac_ids->len) + ids_len); |
2992 | nac_ids->n_controllers = htons(dec_ttl->n_controllers); | |
2993 | ||
2994 | ids = ofpbuf_put_zeros(out, ids_len); | |
2995 | for (i = 0; i < dec_ttl->n_controllers; i++) { | |
2996 | ids[i] = htons(dec_ttl->cnt_ids[i]); | |
8e97815e | 2997 | } |
c2d936a4 BP |
2998 | } else { |
2999 | put_OFPAT_DEC_NW_TTL(out, ofp_version); | |
8e97815e | 3000 | } |
8e97815e BP |
3001 | } |
3002 | ||
c2d936a4 BP |
3003 | static void |
3004 | parse_noargs_dec_ttl(struct ofpbuf *ofpacts) | |
d01c980f | 3005 | { |
c2d936a4 BP |
3006 | struct ofpact_cnt_ids *ids; |
3007 | uint16_t id = 0; | |
3008 | ||
3009 | ofpact_put_DEC_TTL(ofpacts); | |
3010 | ofpbuf_put(ofpacts, &id, sizeof id); | |
6fd6ed71 | 3011 | ids = ofpacts->header; |
c2d936a4 BP |
3012 | ids->n_controllers++; |
3013 | ofpact_update_len(ofpacts, &ids->ofpact); | |
d01c980f BP |
3014 | } |
3015 | ||
cab50449 | 3016 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3017 | parse_DEC_TTL(char *arg, struct ofpbuf *ofpacts, |
3018 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
d01c980f | 3019 | { |
c2d936a4 BP |
3020 | if (*arg == '\0') { |
3021 | parse_noargs_dec_ttl(ofpacts); | |
3022 | } else { | |
3023 | struct ofpact_cnt_ids *ids; | |
3024 | char *cntr; | |
3025 | ||
3026 | ids = ofpact_put_DEC_TTL(ofpacts); | |
3027 | ids->ofpact.raw = NXAST_RAW_DEC_TTL_CNT_IDS; | |
3028 | for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL; | |
3029 | cntr = strtok_r(NULL, ", ", &arg)) { | |
3030 | uint16_t id = atoi(cntr); | |
3031 | ||
3032 | ofpbuf_put(ofpacts, &id, sizeof id); | |
6fd6ed71 | 3033 | ids = ofpacts->header; |
c2d936a4 BP |
3034 | ids->n_controllers++; |
3035 | } | |
3036 | if (!ids->n_controllers) { | |
3037 | return xstrdup("dec_ttl_cnt_ids: expected at least one controller " | |
3038 | "id."); | |
3039 | } | |
3040 | ofpact_update_len(ofpacts, &ids->ofpact); | |
3041 | } | |
3042 | return NULL; | |
d01c980f BP |
3043 | } |
3044 | ||
c2d936a4 BP |
3045 | static void |
3046 | format_DEC_TTL(const struct ofpact_cnt_ids *a, struct ds *s) | |
d01c980f | 3047 | { |
c2d936a4 | 3048 | size_t i; |
d01c980f | 3049 | |
c2d936a4 BP |
3050 | ds_put_cstr(s, "dec_ttl"); |
3051 | if (a->ofpact.raw == NXAST_RAW_DEC_TTL_CNT_IDS) { | |
3052 | ds_put_cstr(s, "("); | |
3053 | for (i = 0; i < a->n_controllers; i++) { | |
3054 | if (i) { | |
3055 | ds_put_cstr(s, ","); | |
d01c980f | 3056 | } |
c2d936a4 BP |
3057 | ds_put_format(s, "%"PRIu16, a->cnt_ids[i]); |
3058 | } | |
3059 | ds_put_cstr(s, ")"); | |
d01c980f BP |
3060 | } |
3061 | } | |
c2d936a4 BP |
3062 | \f |
3063 | /* Set MPLS label actions. */ | |
d01c980f BP |
3064 | |
3065 | static enum ofperr | |
f3cd3ac7 JS |
3066 | decode_OFPAT_RAW_SET_MPLS_LABEL(ovs_be32 label, |
3067 | enum ofp_version ofp_version OVS_UNUSED, | |
3068 | struct ofpbuf *out) | |
d01c980f | 3069 | { |
c2d936a4 BP |
3070 | ofpact_put_SET_MPLS_LABEL(out)->label = label; |
3071 | return 0; | |
3072 | } | |
d01c980f | 3073 | |
c2d936a4 BP |
3074 | static void |
3075 | encode_SET_MPLS_LABEL(const struct ofpact_mpls_label *label, | |
3076 | enum ofp_version ofp_version, | |
3077 | struct ofpbuf *out) | |
3078 | { | |
3079 | if (ofp_version < OFP12_VERSION) { | |
3080 | put_OFPAT_SET_MPLS_LABEL(out, ofp_version, label->label); | |
3081 | } else { | |
3082 | ofpact_put_set_field(out, ofp_version, MFF_MPLS_LABEL, | |
3083 | ntohl(label->label)); | |
d01c980f | 3084 | } |
c2d936a4 | 3085 | } |
d01c980f | 3086 | |
cab50449 | 3087 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3088 | parse_SET_MPLS_LABEL(char *arg, struct ofpbuf *ofpacts, |
3089 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3090 | { | |
3091 | struct ofpact_mpls_label *mpls_label = ofpact_put_SET_MPLS_LABEL(ofpacts); | |
3092 | if (*arg == '\0') { | |
3093 | return xstrdup("set_mpls_label: expected label."); | |
d01c980f | 3094 | } |
c2d936a4 BP |
3095 | |
3096 | mpls_label->label = htonl(atoi(arg)); | |
3097 | return NULL; | |
d01c980f BP |
3098 | } |
3099 | ||
3100 | static void | |
c2d936a4 | 3101 | format_SET_MPLS_LABEL(const struct ofpact_mpls_label *a, struct ds *s) |
d01c980f | 3102 | { |
c2d936a4 | 3103 | ds_put_format(s, "set_mpls_label(%"PRIu32")", ntohl(a->label)); |
d01c980f | 3104 | } |
c2d936a4 BP |
3105 | \f |
3106 | /* Set MPLS TC actions. */ | |
d01c980f | 3107 | |
c2d936a4 | 3108 | static enum ofperr |
f3cd3ac7 JS |
3109 | decode_OFPAT_RAW_SET_MPLS_TC(uint8_t tc, |
3110 | enum ofp_version ofp_version OVS_UNUSED, | |
3111 | struct ofpbuf *out) | |
d01c980f | 3112 | { |
c2d936a4 BP |
3113 | ofpact_put_SET_MPLS_TC(out)->tc = tc; |
3114 | return 0; | |
3115 | } | |
d01c980f | 3116 | |
c2d936a4 BP |
3117 | static void |
3118 | encode_SET_MPLS_TC(const struct ofpact_mpls_tc *tc, | |
3119 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3120 | { | |
3121 | if (ofp_version < OFP12_VERSION) { | |
3122 | put_OFPAT_SET_MPLS_TC(out, ofp_version, tc->tc); | |
3123 | } else { | |
3124 | ofpact_put_set_field(out, ofp_version, MFF_MPLS_TC, tc->tc); | |
8f2cded4 | 3125 | } |
c2d936a4 | 3126 | } |
8f2cded4 | 3127 | |
cab50449 | 3128 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3129 | parse_SET_MPLS_TC(char *arg, struct ofpbuf *ofpacts, |
3130 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3131 | { | |
3132 | struct ofpact_mpls_tc *mpls_tc = ofpact_put_SET_MPLS_TC(ofpacts); | |
d01c980f | 3133 | |
c2d936a4 BP |
3134 | if (*arg == '\0') { |
3135 | return xstrdup("set_mpls_tc: expected tc."); | |
d01c980f BP |
3136 | } |
3137 | ||
c2d936a4 BP |
3138 | mpls_tc->tc = atoi(arg); |
3139 | return NULL; | |
3140 | } | |
d01c980f | 3141 | |
c2d936a4 BP |
3142 | static void |
3143 | format_SET_MPLS_TC(const struct ofpact_mpls_tc *a, struct ds *s) | |
3144 | { | |
3145 | ds_put_format(s, "set_mpls_ttl(%"PRIu8")", a->tc); | |
3146 | } | |
3147 | \f | |
3148 | /* Set MPLS TTL actions. */ | |
d01c980f | 3149 | |
c2d936a4 | 3150 | static enum ofperr |
f3cd3ac7 JS |
3151 | decode_OFPAT_RAW_SET_MPLS_TTL(uint8_t ttl, |
3152 | enum ofp_version ofp_version OVS_UNUSED, | |
3153 | struct ofpbuf *out) | |
c2d936a4 BP |
3154 | { |
3155 | ofpact_put_SET_MPLS_TTL(out)->ttl = ttl; | |
3156 | return 0; | |
3157 | } | |
638a19b0 | 3158 | |
c2d936a4 BP |
3159 | static void |
3160 | encode_SET_MPLS_TTL(const struct ofpact_mpls_ttl *ttl, | |
3161 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3162 | { | |
3163 | put_OFPAT_SET_MPLS_TTL(out, ofp_version, ttl->ttl); | |
3164 | } | |
638a19b0 | 3165 | |
c2d936a4 BP |
3166 | /* Parses 'arg' as the argument to a "set_mpls_ttl" action, and appends such an |
3167 | * action to 'ofpacts'. | |
3168 | * | |
3169 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
3170 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 3171 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3172 | parse_SET_MPLS_TTL(char *arg, struct ofpbuf *ofpacts, |
3173 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3174 | { | |
3175 | struct ofpact_mpls_ttl *mpls_ttl = ofpact_put_SET_MPLS_TTL(ofpacts); | |
d01c980f | 3176 | |
c2d936a4 BP |
3177 | if (*arg == '\0') { |
3178 | return xstrdup("set_mpls_ttl: expected ttl."); | |
b19e8793 | 3179 | } |
7fdb60a7 | 3180 | |
c2d936a4 BP |
3181 | mpls_ttl->ttl = atoi(arg); |
3182 | return NULL; | |
3183 | } | |
4cceacb9 | 3184 | |
c2d936a4 BP |
3185 | static void |
3186 | format_SET_MPLS_TTL(const struct ofpact_mpls_ttl *a, struct ds *s) | |
3187 | { | |
3188 | ds_put_format(s, "set_mpls_ttl(%"PRIu8")", a->ttl); | |
3189 | } | |
3190 | \f | |
3191 | /* Decrement MPLS TTL actions. */ | |
4cceacb9 | 3192 | |
c2d936a4 BP |
3193 | static enum ofperr |
3194 | decode_OFPAT_RAW_DEC_MPLS_TTL(struct ofpbuf *out) | |
3195 | { | |
3196 | ofpact_put_DEC_MPLS_TTL(out); | |
3197 | return 0; | |
3198 | } | |
8dd54666 | 3199 | |
c2d936a4 BP |
3200 | static void |
3201 | encode_DEC_MPLS_TTL(const struct ofpact_null *null OVS_UNUSED, | |
3202 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3203 | { | |
3204 | put_OFPAT_DEC_MPLS_TTL(out, ofp_version); | |
3205 | } | |
3206 | ||
cab50449 | 3207 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3208 | parse_DEC_MPLS_TTL(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
3209 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3210 | { | |
3211 | ofpact_put_DEC_MPLS_TTL(ofpacts); | |
3212 | return NULL; | |
3213 | } | |
3214 | ||
3215 | static void | |
3216 | format_DEC_MPLS_TTL(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
3217 | { | |
3218 | ds_put_cstr(s, "dec_mpls_ttl"); | |
3219 | } | |
3220 | \f | |
3221 | /* Push MPLS label action. */ | |
3222 | ||
3223 | static enum ofperr | |
f3cd3ac7 JS |
3224 | decode_OFPAT_RAW_PUSH_MPLS(ovs_be16 ethertype, |
3225 | enum ofp_version ofp_version OVS_UNUSED, | |
3226 | struct ofpbuf *out) | |
c2d936a4 BP |
3227 | { |
3228 | struct ofpact_push_mpls *oam; | |
3229 | ||
3230 | if (!eth_type_mpls(ethertype)) { | |
3231 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
8dd54666 | 3232 | } |
c2d936a4 BP |
3233 | oam = ofpact_put_PUSH_MPLS(out); |
3234 | oam->ethertype = ethertype; | |
d01c980f | 3235 | |
c2d936a4 BP |
3236 | return 0; |
3237 | } | |
3238 | ||
3239 | static void | |
3240 | encode_PUSH_MPLS(const struct ofpact_push_mpls *push_mpls, | |
3241 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3242 | { | |
3243 | put_OFPAT_PUSH_MPLS(out, ofp_version, push_mpls->ethertype); | |
3244 | } | |
3245 | ||
cab50449 | 3246 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3247 | parse_PUSH_MPLS(char *arg, struct ofpbuf *ofpacts, |
3248 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3249 | { | |
3250 | uint16_t ethertype; | |
3251 | char *error; | |
3252 | ||
3253 | error = str_to_u16(arg, "push_mpls", ðertype); | |
3254 | if (!error) { | |
3255 | ofpact_put_PUSH_MPLS(ofpacts)->ethertype = htons(ethertype); | |
d01c980f BP |
3256 | } |
3257 | return error; | |
3258 | } | |
c2d936a4 BP |
3259 | |
3260 | static void | |
3261 | format_PUSH_MPLS(const struct ofpact_push_mpls *a, struct ds *s) | |
3262 | { | |
3263 | ds_put_format(s, "push_mpls:0x%04"PRIx16, ntohs(a->ethertype)); | |
3264 | } | |
d01c980f | 3265 | \f |
c2d936a4 BP |
3266 | /* Pop MPLS label action. */ |
3267 | ||
3268 | static enum ofperr | |
f3cd3ac7 JS |
3269 | decode_OFPAT_RAW_POP_MPLS(ovs_be16 ethertype, |
3270 | enum ofp_version ofp_version OVS_UNUSED, | |
3271 | struct ofpbuf *out) | |
57ad4e9e | 3272 | { |
c2d936a4 BP |
3273 | ofpact_put_POP_MPLS(out)->ethertype = ethertype; |
3274 | return 0; | |
3275 | } | |
57ad4e9e | 3276 | |
c2d936a4 BP |
3277 | static void |
3278 | encode_POP_MPLS(const struct ofpact_pop_mpls *pop_mpls, | |
3279 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3280 | { | |
3281 | put_OFPAT_POP_MPLS(out, ofp_version, pop_mpls->ethertype); | |
3282 | } | |
3283 | ||
cab50449 | 3284 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3285 | parse_POP_MPLS(char *arg, struct ofpbuf *ofpacts, |
3286 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3287 | { | |
3288 | uint16_t ethertype; | |
3289 | char *error; | |
3290 | ||
3291 | error = str_to_u16(arg, "pop_mpls", ðertype); | |
3292 | if (!error) { | |
3293 | ofpact_put_POP_MPLS(ofpacts)->ethertype = htons(ethertype); | |
57ad4e9e | 3294 | } |
c2d936a4 | 3295 | return error; |
57ad4e9e BP |
3296 | } |
3297 | ||
ba2fe8e9 | 3298 | static void |
c2d936a4 | 3299 | format_POP_MPLS(const struct ofpact_pop_mpls *a, struct ds *s) |
ba2fe8e9 | 3300 | { |
c2d936a4 | 3301 | ds_put_format(s, "pop_mpls:0x%04"PRIx16, ntohs(a->ethertype)); |
ba2fe8e9 | 3302 | } |
c2d936a4 BP |
3303 | \f |
3304 | /* Set tunnel ID actions. */ | |
ba2fe8e9 | 3305 | |
f25d0cf3 | 3306 | static enum ofperr |
f3cd3ac7 JS |
3307 | decode_NXAST_RAW_SET_TUNNEL(uint32_t tun_id, |
3308 | enum ofp_version ofp_version OVS_UNUSED, | |
3309 | struct ofpbuf *out) | |
f25d0cf3 | 3310 | { |
c2d936a4 BP |
3311 | struct ofpact_tunnel *tunnel = ofpact_put_SET_TUNNEL(out); |
3312 | tunnel->ofpact.raw = NXAST_RAW_SET_TUNNEL; | |
3313 | tunnel->tun_id = tun_id; | |
3314 | return 0; | |
3315 | } | |
f25d0cf3 | 3316 | |
c2d936a4 | 3317 | static enum ofperr |
f3cd3ac7 JS |
3318 | decode_NXAST_RAW_SET_TUNNEL64(uint64_t tun_id, |
3319 | enum ofp_version ofp_version OVS_UNUSED, | |
3320 | struct ofpbuf *out) | |
c2d936a4 BP |
3321 | { |
3322 | struct ofpact_tunnel *tunnel = ofpact_put_SET_TUNNEL(out); | |
3323 | tunnel->ofpact.raw = NXAST_RAW_SET_TUNNEL64; | |
3324 | tunnel->tun_id = tun_id; | |
3325 | return 0; | |
3326 | } | |
f25d0cf3 | 3327 | |
c2d936a4 BP |
3328 | static void |
3329 | encode_SET_TUNNEL(const struct ofpact_tunnel *tunnel, | |
3330 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3331 | { | |
3332 | uint64_t tun_id = tunnel->tun_id; | |
f25d0cf3 | 3333 | |
c2d936a4 BP |
3334 | if (ofp_version < OFP12_VERSION) { |
3335 | if (tun_id <= UINT32_MAX | |
3336 | && tunnel->ofpact.raw != NXAST_RAW_SET_TUNNEL64) { | |
3337 | put_NXAST_SET_TUNNEL(out, tun_id); | |
3338 | } else { | |
3339 | put_NXAST_SET_TUNNEL64(out, tun_id); | |
f25d0cf3 | 3340 | } |
c2d936a4 BP |
3341 | } else { |
3342 | ofpact_put_set_field(out, ofp_version, MFF_TUN_ID, tun_id); | |
3343 | } | |
3344 | } | |
f25d0cf3 | 3345 | |
cab50449 | 3346 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3347 | parse_set_tunnel(char *arg, struct ofpbuf *ofpacts, |
3348 | enum ofp_raw_action_type raw) | |
3349 | { | |
3350 | struct ofpact_tunnel *tunnel; | |
ca287d20 | 3351 | |
c2d936a4 BP |
3352 | tunnel = ofpact_put_SET_TUNNEL(ofpacts); |
3353 | tunnel->ofpact.raw = raw; | |
3354 | return str_to_u64(arg, &tunnel->tun_id); | |
3355 | } | |
8621547c | 3356 | |
cab50449 | 3357 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3358 | parse_SET_TUNNEL(char *arg, struct ofpbuf *ofpacts, |
3359 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3360 | { | |
3361 | return parse_set_tunnel(arg, ofpacts, NXAST_RAW_SET_TUNNEL); | |
3362 | } | |
8621547c | 3363 | |
c2d936a4 BP |
3364 | static void |
3365 | format_SET_TUNNEL(const struct ofpact_tunnel *a, struct ds *s) | |
3366 | { | |
3367 | ds_put_format(s, "set_tunnel%s:%#"PRIx64, | |
3368 | (a->tun_id > UINT32_MAX | |
3369 | || a->ofpact.raw == NXAST_RAW_SET_TUNNEL64 ? "64" : ""), | |
3370 | a->tun_id); | |
3371 | } | |
3372 | \f | |
3373 | /* Set queue action. */ | |
8621547c | 3374 | |
c2d936a4 | 3375 | static enum ofperr |
f3cd3ac7 JS |
3376 | decode_OFPAT_RAW_SET_QUEUE(uint32_t queue_id, |
3377 | enum ofp_version ofp_version OVS_UNUSED, | |
3378 | struct ofpbuf *out) | |
c2d936a4 BP |
3379 | { |
3380 | ofpact_put_SET_QUEUE(out)->queue_id = queue_id; | |
3381 | return 0; | |
3382 | } | |
8621547c | 3383 | |
c2d936a4 BP |
3384 | static void |
3385 | encode_SET_QUEUE(const struct ofpact_queue *queue, | |
3386 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3387 | { | |
3388 | put_OFPAT_SET_QUEUE(out, ofp_version, queue->queue_id); | |
3389 | } | |
8621547c | 3390 | |
cab50449 | 3391 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3392 | parse_SET_QUEUE(char *arg, struct ofpbuf *ofpacts, |
3393 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3394 | { | |
3395 | return str_to_u32(arg, &ofpact_put_SET_QUEUE(ofpacts)->queue_id); | |
3396 | } | |
8621547c | 3397 | |
c2d936a4 BP |
3398 | static void |
3399 | format_SET_QUEUE(const struct ofpact_queue *a, struct ds *s) | |
3400 | { | |
3401 | ds_put_format(s, "set_queue:%"PRIu32, a->queue_id); | |
3402 | } | |
3403 | \f | |
3404 | /* Pop queue action. */ | |
1e7db674 | 3405 | |
c2d936a4 BP |
3406 | static enum ofperr |
3407 | decode_NXAST_RAW_POP_QUEUE(struct ofpbuf *out) | |
3408 | { | |
3409 | ofpact_put_POP_QUEUE(out); | |
3410 | return 0; | |
3411 | } | |
f25d0cf3 | 3412 | |
c2d936a4 BP |
3413 | static void |
3414 | encode_POP_QUEUE(const struct ofpact_null *null OVS_UNUSED, | |
3415 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
3416 | { | |
3417 | put_NXAST_POP_QUEUE(out); | |
3418 | } | |
f25d0cf3 | 3419 | |
cab50449 | 3420 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3421 | parse_POP_QUEUE(const char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
3422 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3423 | { | |
3424 | ofpact_put_POP_QUEUE(ofpacts); | |
3425 | return NULL; | |
3426 | } | |
f25d0cf3 | 3427 | |
c2d936a4 BP |
3428 | static void |
3429 | format_POP_QUEUE(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
3430 | { | |
3431 | ds_put_cstr(s, "pop_queue"); | |
3432 | } | |
3433 | \f | |
3434 | /* Action structure for NXAST_FIN_TIMEOUT. | |
3435 | * | |
3436 | * This action changes the idle timeout or hard timeout, or both, of this | |
3437 | * OpenFlow rule when the rule matches a TCP packet with the FIN or RST flag. | |
3438 | * When such a packet is observed, the action reduces the rule's idle timeout | |
3439 | * to 'fin_idle_timeout' and its hard timeout to 'fin_hard_timeout'. This | |
3440 | * action has no effect on an existing timeout that is already shorter than the | |
3441 | * one that the action specifies. A 'fin_idle_timeout' or 'fin_hard_timeout' | |
3442 | * of zero has no effect on the respective timeout. | |
3443 | * | |
3444 | * 'fin_idle_timeout' and 'fin_hard_timeout' are measured in seconds. | |
3445 | * 'fin_hard_timeout' specifies time since the flow's creation, not since the | |
3446 | * receipt of the FIN or RST. | |
3447 | * | |
3448 | * This is useful for quickly discarding learned TCP flows that otherwise will | |
3449 | * take a long time to expire. | |
3450 | * | |
3451 | * This action is intended for use with an OpenFlow rule that matches only a | |
3452 | * single TCP flow. If the rule matches multiple TCP flows (e.g. it wildcards | |
3453 | * all TCP traffic, or all TCP traffic to a particular port), then any FIN or | |
3454 | * RST in any of those flows will cause the entire OpenFlow rule to expire | |
3455 | * early, which is not normally desirable. | |
3456 | */ | |
3457 | struct nx_action_fin_timeout { | |
3458 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3459 | ovs_be16 len; /* 16. */ | |
3460 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3461 | ovs_be16 subtype; /* NXAST_FIN_TIMEOUT. */ | |
3462 | ovs_be16 fin_idle_timeout; /* New idle timeout, if nonzero. */ | |
3463 | ovs_be16 fin_hard_timeout; /* New hard timeout, if nonzero. */ | |
3464 | ovs_be16 pad; /* Must be zero. */ | |
3465 | }; | |
3466 | OFP_ASSERT(sizeof(struct nx_action_fin_timeout) == 16); | |
f25d0cf3 | 3467 | |
c2d936a4 BP |
3468 | static enum ofperr |
3469 | decode_NXAST_RAW_FIN_TIMEOUT(const struct nx_action_fin_timeout *naft, | |
f3cd3ac7 | 3470 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
3471 | struct ofpbuf *out) |
3472 | { | |
3473 | struct ofpact_fin_timeout *oft; | |
8621547c | 3474 | |
c2d936a4 BP |
3475 | oft = ofpact_put_FIN_TIMEOUT(out); |
3476 | oft->fin_idle_timeout = ntohs(naft->fin_idle_timeout); | |
3477 | oft->fin_hard_timeout = ntohs(naft->fin_hard_timeout); | |
3478 | return 0; | |
3479 | } | |
f25d0cf3 | 3480 | |
c2d936a4 BP |
3481 | static void |
3482 | encode_FIN_TIMEOUT(const struct ofpact_fin_timeout *fin_timeout, | |
3483 | enum ofp_version ofp_version OVS_UNUSED, | |
3484 | struct ofpbuf *out) | |
3485 | { | |
3486 | struct nx_action_fin_timeout *naft = put_NXAST_FIN_TIMEOUT(out); | |
3487 | naft->fin_idle_timeout = htons(fin_timeout->fin_idle_timeout); | |
3488 | naft->fin_hard_timeout = htons(fin_timeout->fin_hard_timeout); | |
3489 | } | |
f25d0cf3 | 3490 | |
cab50449 | 3491 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3492 | parse_FIN_TIMEOUT(char *arg, struct ofpbuf *ofpacts, |
3493 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3494 | { | |
3495 | struct ofpact_fin_timeout *oft = ofpact_put_FIN_TIMEOUT(ofpacts); | |
3496 | char *key, *value; | |
f25d0cf3 | 3497 | |
c2d936a4 BP |
3498 | while (ofputil_parse_key_value(&arg, &key, &value)) { |
3499 | char *error; | |
b02475c5 | 3500 | |
c2d936a4 BP |
3501 | if (!strcmp(key, "idle_timeout")) { |
3502 | error = str_to_u16(value, key, &oft->fin_idle_timeout); | |
3503 | } else if (!strcmp(key, "hard_timeout")) { | |
3504 | error = str_to_u16(value, key, &oft->fin_hard_timeout); | |
3505 | } else { | |
3506 | error = xasprintf("invalid key '%s' in 'fin_timeout' argument", | |
3507 | key); | |
8621547c | 3508 | } |
8dd54666 | 3509 | |
c2d936a4 BP |
3510 | if (error) { |
3511 | return error; | |
9cae45dc | 3512 | } |
9cae45dc | 3513 | } |
c2d936a4 BP |
3514 | return NULL; |
3515 | } | |
e3b56933 | 3516 | |
c2d936a4 BP |
3517 | static void |
3518 | format_FIN_TIMEOUT(const struct ofpact_fin_timeout *a, struct ds *s) | |
3519 | { | |
3520 | ds_put_cstr(s, "fin_timeout("); | |
3521 | if (a->fin_idle_timeout) { | |
3522 | ds_put_format(s, "idle_timeout=%"PRIu16",", a->fin_idle_timeout); | |
7e9f8266 | 3523 | } |
c2d936a4 BP |
3524 | if (a->fin_hard_timeout) { |
3525 | ds_put_format(s, "hard_timeout=%"PRIu16",", a->fin_hard_timeout); | |
f25d0cf3 | 3526 | } |
c2d936a4 BP |
3527 | ds_chomp(s, ','); |
3528 | ds_put_char(s, ')'); | |
f25d0cf3 | 3529 | } |
c2d936a4 BP |
3530 | \f |
3531 | /* Action structures for NXAST_RESUBMIT and NXAST_RESUBMIT_TABLE. | |
eca39bce | 3532 | * |
c2d936a4 | 3533 | * These actions search one of the switch's flow tables: |
ba2fe8e9 | 3534 | * |
c2d936a4 BP |
3535 | * - For NXAST_RESUBMIT_TABLE only, if the 'table' member is not 255, then |
3536 | * it specifies the table to search. | |
ca287d20 | 3537 | * |
c2d936a4 BP |
3538 | * - Otherwise (for NXAST_RESUBMIT_TABLE with a 'table' of 255, or for |
3539 | * NXAST_RESUBMIT regardless of 'table'), it searches the current flow | |
3540 | * table, that is, the OpenFlow flow table that contains the flow from | |
3541 | * which this action was obtained. If this action did not come from a | |
3542 | * flow table (e.g. it came from an OFPT_PACKET_OUT message), then table 0 | |
3543 | * is the current table. | |
3544 | * | |
3545 | * The flow table lookup uses a flow that may be slightly modified from the | |
3546 | * original lookup: | |
3547 | * | |
3548 | * - For NXAST_RESUBMIT, the 'in_port' member of struct nx_action_resubmit | |
3549 | * is used as the flow's in_port. | |
3550 | * | |
3551 | * - For NXAST_RESUBMIT_TABLE, if the 'in_port' member is not OFPP_IN_PORT, | |
3552 | * then its value is used as the flow's in_port. Otherwise, the original | |
3553 | * in_port is used. | |
3554 | * | |
3555 | * - If actions that modify the flow (e.g. OFPAT_SET_VLAN_VID) precede the | |
3556 | * resubmit action, then the flow is updated with the new values. | |
3557 | * | |
3558 | * Following the lookup, the original in_port is restored. | |
3559 | * | |
3560 | * If the modified flow matched in the flow table, then the corresponding | |
3561 | * actions are executed. Afterward, actions following the resubmit in the | |
3562 | * original set of actions, if any, are executed; any changes made to the | |
3563 | * packet (e.g. changes to VLAN) by secondary actions persist when those | |
3564 | * actions are executed, although the original in_port is restored. | |
3565 | * | |
3566 | * Resubmit actions may be used any number of times within a set of actions. | |
3567 | * | |
3568 | * Resubmit actions may nest to an implementation-defined depth. Beyond this | |
3569 | * implementation-defined depth, further resubmit actions are simply ignored. | |
3570 | * | |
3571 | * NXAST_RESUBMIT ignores 'table' and 'pad'. NXAST_RESUBMIT_TABLE requires | |
3572 | * 'pad' to be all-bits-zero. | |
3573 | * | |
3574 | * Open vSwitch 1.0.1 and earlier did not support recursion. Open vSwitch | |
3575 | * before 1.2.90 did not support NXAST_RESUBMIT_TABLE. | |
3576 | */ | |
3577 | struct nx_action_resubmit { | |
3578 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3579 | ovs_be16 len; /* Length is 16. */ | |
3580 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3581 | ovs_be16 subtype; /* NXAST_RESUBMIT. */ | |
3582 | ovs_be16 in_port; /* New in_port for checking flow table. */ | |
3583 | uint8_t table; /* NXAST_RESUBMIT_TABLE: table to use. */ | |
3584 | uint8_t pad[3]; | |
3585 | }; | |
3586 | OFP_ASSERT(sizeof(struct nx_action_resubmit) == 16); | |
3587 | ||
3588 | static enum ofperr | |
f3cd3ac7 JS |
3589 | decode_NXAST_RAW_RESUBMIT(uint16_t port, |
3590 | enum ofp_version ofp_version OVS_UNUSED, | |
3591 | struct ofpbuf *out) | |
f25d0cf3 | 3592 | { |
c2d936a4 | 3593 | struct ofpact_resubmit *resubmit; |
f25d0cf3 | 3594 | |
c2d936a4 BP |
3595 | resubmit = ofpact_put_RESUBMIT(out); |
3596 | resubmit->ofpact.raw = NXAST_RAW_RESUBMIT; | |
3597 | resubmit->in_port = u16_to_ofp(port); | |
3598 | resubmit->table_id = 0xff; | |
3599 | return 0; | |
f25d0cf3 | 3600 | } |
4cceacb9 | 3601 | |
c2d936a4 BP |
3602 | static enum ofperr |
3603 | decode_NXAST_RAW_RESUBMIT_TABLE(const struct nx_action_resubmit *nar, | |
f3cd3ac7 | 3604 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 3605 | struct ofpbuf *out) |
ba2fe8e9 | 3606 | { |
c2d936a4 | 3607 | struct ofpact_resubmit *resubmit; |
ba2fe8e9 | 3608 | |
c2d936a4 BP |
3609 | if (nar->pad[0] || nar->pad[1] || nar->pad[2]) { |
3610 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3611 | } | |
3612 | ||
3613 | resubmit = ofpact_put_RESUBMIT(out); | |
3614 | resubmit->ofpact.raw = NXAST_RAW_RESUBMIT_TABLE; | |
3615 | resubmit->in_port = u16_to_ofp(ntohs(nar->in_port)); | |
3616 | resubmit->table_id = nar->table; | |
3617 | return 0; | |
ba2fe8e9 BP |
3618 | } |
3619 | ||
c2d936a4 BP |
3620 | static void |
3621 | encode_RESUBMIT(const struct ofpact_resubmit *resubmit, | |
3622 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4cceacb9 | 3623 | { |
c2d936a4 | 3624 | uint16_t in_port = ofp_to_u16(resubmit->in_port); |
4cceacb9 | 3625 | |
c2d936a4 BP |
3626 | if (resubmit->table_id == 0xff |
3627 | && resubmit->ofpact.raw != NXAST_RAW_RESUBMIT_TABLE) { | |
3628 | put_NXAST_RESUBMIT(out, in_port); | |
3629 | } else { | |
3630 | struct nx_action_resubmit *nar = put_NXAST_RESUBMIT_TABLE(out); | |
3631 | nar->table = resubmit->table_id; | |
3632 | nar->in_port = htons(in_port); | |
3633 | } | |
3634 | } | |
6813ee7c | 3635 | |
cab50449 | 3636 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3637 | parse_RESUBMIT(char *arg, struct ofpbuf *ofpacts, |
3638 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3639 | { | |
3640 | struct ofpact_resubmit *resubmit; | |
3641 | char *in_port_s, *table_s; | |
6813ee7c | 3642 | |
c2d936a4 | 3643 | resubmit = ofpact_put_RESUBMIT(ofpacts); |
8f2cded4 | 3644 | |
c2d936a4 BP |
3645 | in_port_s = strsep(&arg, ","); |
3646 | if (in_port_s && in_port_s[0]) { | |
3647 | if (!ofputil_port_from_string(in_port_s, &resubmit->in_port)) { | |
3648 | return xasprintf("%s: resubmit to unknown port", in_port_s); | |
8f2cded4 | 3649 | } |
c2d936a4 BP |
3650 | } else { |
3651 | resubmit->in_port = OFPP_IN_PORT; | |
3652 | } | |
4cceacb9 | 3653 | |
c2d936a4 BP |
3654 | table_s = strsep(&arg, ","); |
3655 | if (table_s && table_s[0]) { | |
3656 | uint32_t table_id = 0; | |
3657 | char *error; | |
3658 | ||
3659 | error = str_to_u32(table_s, &table_id); | |
3660 | if (error) { | |
3661 | return error; | |
3662 | } | |
3663 | resubmit->table_id = table_id; | |
3664 | } else { | |
3665 | resubmit->table_id = 255; | |
4cceacb9 JS |
3666 | } |
3667 | ||
c2d936a4 BP |
3668 | if (resubmit->in_port == OFPP_IN_PORT && resubmit->table_id == 255) { |
3669 | return xstrdup("at least one \"in_port\" or \"table\" must be " | |
3670 | "specified on resubmit"); | |
3671 | } | |
3672 | return NULL; | |
3673 | } | |
3674 | ||
3675 | static void | |
3676 | format_RESUBMIT(const struct ofpact_resubmit *a, struct ds *s) | |
3677 | { | |
3678 | if (a->in_port != OFPP_IN_PORT && a->table_id == 255) { | |
3679 | ds_put_cstr(s, "resubmit:"); | |
3680 | ofputil_format_port(a->in_port, s); | |
3681 | } else { | |
3682 | ds_put_format(s, "resubmit("); | |
3683 | if (a->in_port != OFPP_IN_PORT) { | |
3684 | ofputil_format_port(a->in_port, s); | |
3685 | } | |
3686 | ds_put_char(s, ','); | |
3687 | if (a->table_id != 255) { | |
3688 | ds_put_format(s, "%"PRIu8, a->table_id); | |
3689 | } | |
3690 | ds_put_char(s, ')'); | |
3691 | } | |
3692 | } | |
3693 | \f | |
3694 | /* Action structure for NXAST_LEARN. | |
3695 | * | |
3696 | * This action adds or modifies a flow in an OpenFlow table, similar to | |
3697 | * OFPT_FLOW_MOD with OFPFC_MODIFY_STRICT as 'command'. The new flow has the | |
3698 | * specified idle timeout, hard timeout, priority, cookie, and flags. The new | |
3699 | * flow's match criteria and actions are built by applying each of the series | |
3700 | * of flow_mod_spec elements included as part of the action. | |
3701 | * | |
3702 | * A flow_mod_spec starts with a 16-bit header. A header that is all-bits-0 is | |
3703 | * a no-op used for padding the action as a whole to a multiple of 8 bytes in | |
3704 | * length. Otherwise, the flow_mod_spec can be thought of as copying 'n_bits' | |
3705 | * bits from a source to a destination. In this case, the header contains | |
3706 | * multiple fields: | |
3707 | * | |
3708 | * 15 14 13 12 11 10 0 | |
3709 | * +------+---+------+---------------------------------+ | |
3710 | * | 0 |src| dst | n_bits | | |
3711 | * +------+---+------+---------------------------------+ | |
3712 | * | |
3713 | * The meaning and format of a flow_mod_spec depends on 'src' and 'dst'. The | |
3714 | * following table summarizes the meaning of each possible combination. | |
3715 | * Details follow the table: | |
3716 | * | |
3717 | * src dst meaning | |
3718 | * --- --- ---------------------------------------------------------- | |
3719 | * 0 0 Add match criteria based on value in a field. | |
3720 | * 1 0 Add match criteria based on an immediate value. | |
3721 | * 0 1 Add NXAST_REG_LOAD action to copy field into a different field. | |
3722 | * 1 1 Add NXAST_REG_LOAD action to load immediate value into a field. | |
3723 | * 0 2 Add OFPAT_OUTPUT action to output to port from specified field. | |
3724 | * All other combinations are undefined and not allowed. | |
3725 | * | |
3726 | * The flow_mod_spec header is followed by a source specification and a | |
3727 | * destination specification. The format and meaning of the source | |
3728 | * specification depends on 'src': | |
3729 | * | |
3730 | * - If 'src' is 0, the source bits are taken from a field in the flow to | |
3731 | * which this action is attached. (This should be a wildcarded field. If | |
3732 | * its value is fully specified then the source bits being copied have | |
3733 | * constant values.) | |
3734 | * | |
3735 | * The source specification is an ovs_be32 'field' and an ovs_be16 'ofs'. | |
3736 | * 'field' is an nxm_header with nxm_hasmask=0, and 'ofs' the starting bit | |
3737 | * offset within that field. The source bits are field[ofs:ofs+n_bits-1]. | |
3738 | * 'field' and 'ofs' are subject to the same restrictions as the source | |
3739 | * field in NXAST_REG_MOVE. | |
3740 | * | |
3741 | * - If 'src' is 1, the source bits are a constant value. The source | |
3742 | * specification is (n_bits+15)/16*2 bytes long. Taking those bytes as a | |
3743 | * number in network order, the source bits are the 'n_bits' | |
3744 | * least-significant bits. The switch will report an error if other bits | |
3745 | * in the constant are nonzero. | |
3746 | * | |
3747 | * The flow_mod_spec destination specification, for 'dst' of 0 or 1, is an | |
3748 | * ovs_be32 'field' and an ovs_be16 'ofs'. 'field' is an nxm_header with | |
3749 | * nxm_hasmask=0 and 'ofs' is a starting bit offset within that field. The | |
3750 | * meaning of the flow_mod_spec depends on 'dst': | |
3751 | * | |
3752 | * - If 'dst' is 0, the flow_mod_spec specifies match criteria for the new | |
3753 | * flow. The new flow matches only if bits field[ofs:ofs+n_bits-1] in a | |
3754 | * packet equal the source bits. 'field' may be any nxm_header with | |
3755 | * nxm_hasmask=0 that is allowed in NXT_FLOW_MOD. | |
3756 | * | |
3757 | * Order is significant. Earlier flow_mod_specs must satisfy any | |
3758 | * prerequisites for matching fields specified later, by copying constant | |
3759 | * values into prerequisite fields. | |
3760 | * | |
3761 | * The switch will reject flow_mod_specs that do not satisfy NXM masking | |
3762 | * restrictions. | |
3763 | * | |
3764 | * - If 'dst' is 1, the flow_mod_spec specifies an NXAST_REG_LOAD action for | |
3765 | * the new flow. The new flow copies the source bits into | |
3766 | * field[ofs:ofs+n_bits-1]. Actions are executed in the same order as the | |
3767 | * flow_mod_specs. | |
3768 | * | |
3769 | * A single NXAST_REG_LOAD action writes no more than 64 bits, so n_bits | |
3770 | * greater than 64 yields multiple NXAST_REG_LOAD actions. | |
3771 | * | |
3772 | * The flow_mod_spec destination spec for 'dst' of 2 (when 'src' is 0) is | |
3773 | * empty. It has the following meaning: | |
3774 | * | |
3775 | * - The flow_mod_spec specifies an OFPAT_OUTPUT action for the new flow. | |
3776 | * The new flow outputs to the OpenFlow port specified by the source field. | |
3777 | * Of the special output ports with value OFPP_MAX or larger, OFPP_IN_PORT, | |
3778 | * OFPP_FLOOD, OFPP_LOCAL, and OFPP_ALL are supported. Other special ports | |
3779 | * may not be used. | |
3780 | * | |
3781 | * Resource Management | |
3782 | * ------------------- | |
3783 | * | |
3784 | * A switch has a finite amount of flow table space available for learning. | |
3785 | * When this space is exhausted, no new learning table entries will be learned | |
3786 | * until some existing flow table entries expire. The controller should be | |
3787 | * prepared to handle this by flooding (which can be implemented as a | |
3788 | * low-priority flow). | |
3789 | * | |
3790 | * If a learned flow matches a single TCP stream with a relatively long | |
3791 | * timeout, one may make the best of resource constraints by setting | |
3792 | * 'fin_idle_timeout' or 'fin_hard_timeout' (both measured in seconds), or | |
3793 | * both, to shorter timeouts. When either of these is specified as a nonzero | |
3794 | * value, OVS adds a NXAST_FIN_TIMEOUT action, with the specified timeouts, to | |
3795 | * the learned flow. | |
3796 | * | |
3797 | * Examples | |
3798 | * -------- | |
3799 | * | |
3800 | * The following examples give a prose description of the flow_mod_specs along | |
3801 | * with informal notation for how those would be represented and a hex dump of | |
3802 | * the bytes that would be required. | |
3803 | * | |
3804 | * These examples could work with various nx_action_learn parameters. Typical | |
3805 | * values would be idle_timeout=OFP_FLOW_PERMANENT, hard_timeout=60, | |
3806 | * priority=OFP_DEFAULT_PRIORITY, flags=0, table_id=10. | |
3807 | * | |
3808 | * 1. Learn input port based on the source MAC, with lookup into | |
3809 | * NXM_NX_REG1[16:31] by resubmit to in_port=99: | |
3810 | * | |
3811 | * Match on in_port=99: | |
3812 | * ovs_be16(src=1, dst=0, n_bits=16), 20 10 | |
3813 | * ovs_be16(99), 00 63 | |
3814 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3815 | * | |
3816 | * Match Ethernet destination on Ethernet source from packet: | |
3817 | * ovs_be16(src=0, dst=0, n_bits=48), 00 30 | |
3818 | * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00 | |
3819 | * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00 | |
3820 | * | |
3821 | * Set NXM_NX_REG1[16:31] to the packet's input port: | |
3822 | * ovs_be16(src=0, dst=1, n_bits=16), 08 10 | |
3823 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3824 | * ovs_be32(NXM_NX_REG1), ovs_be16(16) 00 01 02 04 00 10 | |
3825 | * | |
3826 | * Given a packet that arrived on port A with Ethernet source address B, | |
3827 | * this would set up the flow "in_port=99, dl_dst=B, | |
3828 | * actions=load:A->NXM_NX_REG1[16..31]". | |
3829 | * | |
3830 | * In syntax accepted by ovs-ofctl, this action is: learn(in_port=99, | |
3831 | * NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], | |
3832 | * load:NXM_OF_IN_PORT[]->NXM_NX_REG1[16..31]) | |
3833 | * | |
3834 | * 2. Output to input port based on the source MAC and VLAN VID, with lookup | |
3835 | * into NXM_NX_REG1[16:31]: | |
3836 | * | |
3837 | * Match on same VLAN ID as packet: | |
3838 | * ovs_be16(src=0, dst=0, n_bits=12), 00 0c | |
3839 | * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00 | |
3840 | * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00 | |
3841 | * | |
3842 | * Match Ethernet destination on Ethernet source from packet: | |
3843 | * ovs_be16(src=0, dst=0, n_bits=48), 00 30 | |
3844 | * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00 | |
3845 | * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00 | |
3846 | * | |
3847 | * Output to the packet's input port: | |
3848 | * ovs_be16(src=0, dst=2, n_bits=16), 10 10 | |
3849 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3850 | * | |
3851 | * Given a packet that arrived on port A with Ethernet source address B in | |
3852 | * VLAN C, this would set up the flow "dl_dst=B, vlan_vid=C, | |
3853 | * actions=output:A". | |
3854 | * | |
3855 | * In syntax accepted by ovs-ofctl, this action is: | |
3856 | * learn(NXM_OF_VLAN_TCI[0..11], NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], | |
3857 | * output:NXM_OF_IN_PORT[]) | |
3858 | * | |
3859 | * 3. Here's a recipe for a very simple-minded MAC learning switch. It uses a | |
3860 | * 10-second MAC expiration time to make it easier to see what's going on | |
3861 | * | |
3862 | * ovs-vsctl del-controller br0 | |
3863 | * ovs-ofctl del-flows br0 | |
3864 | * ovs-ofctl add-flow br0 "table=0 actions=learn(table=1, \ | |
3865 | hard_timeout=10, NXM_OF_VLAN_TCI[0..11], \ | |
3866 | NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], \ | |
3867 | output:NXM_OF_IN_PORT[]), resubmit(,1)" | |
3868 | * ovs-ofctl add-flow br0 "table=1 priority=0 actions=flood" | |
3869 | * | |
3870 | * You can then dump the MAC learning table with: | |
3871 | * | |
3872 | * ovs-ofctl dump-flows br0 table=1 | |
3873 | * | |
3874 | * Usage Advice | |
3875 | * ------------ | |
3876 | * | |
3877 | * For best performance, segregate learned flows into a table that is not used | |
3878 | * for any other flows except possibly for a lowest-priority "catch-all" flow | |
3879 | * (a flow with no match criteria). If different learning actions specify | |
3880 | * different match criteria, use different tables for the learned flows. | |
3881 | * | |
3882 | * The meaning of 'hard_timeout' and 'idle_timeout' can be counterintuitive. | |
3883 | * These timeouts apply to the flow that is added, which means that a flow with | |
3884 | * an idle timeout will expire when no traffic has been sent *to* the learned | |
3885 | * address. This is not usually the intent in MAC learning; instead, we want | |
3886 | * the MAC learn entry to expire when no traffic has been sent *from* the | |
3887 | * learned address. Use a hard timeout for that. | |
39c94593 JR |
3888 | * |
3889 | * | |
3890 | * Visibility of Changes | |
3891 | * --------------------- | |
3892 | * | |
3893 | * Prior to Open vSwitch 2.4, any changes made by a "learn" action in a given | |
3894 | * flow translation are visible to flow table lookups made later in the flow | |
3895 | * translation. This means that, in the example above, a MAC learned by the | |
3896 | * learn action in table 0 would be found in table 1 (if the packet being | |
3897 | * processed had the same source and destination MAC address). | |
3898 | * | |
3899 | * In Open vSwitch 2.4 and later, changes to a flow table (whether to add or | |
3900 | * modify a flow) by a "learn" action are visible only for later flow | |
3901 | * translations, not for later lookups within the same flow translation. In | |
3902 | * the MAC learning example, a MAC learned by the learn action in table 0 would | |
3903 | * not be found in table 1 if the flow translation would resubmit to table 1 | |
3904 | * after the processing of the learn action, meaning that if this MAC had not | |
3905 | * been learned before then the packet would be flooded. */ | |
c2d936a4 BP |
3906 | struct nx_action_learn { |
3907 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3908 | ovs_be16 len; /* At least 24. */ | |
3909 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3910 | ovs_be16 subtype; /* NXAST_LEARN. */ | |
3911 | ovs_be16 idle_timeout; /* Idle time before discarding (seconds). */ | |
3912 | ovs_be16 hard_timeout; /* Max time before discarding (seconds). */ | |
3913 | ovs_be16 priority; /* Priority level of flow entry. */ | |
3914 | ovs_be64 cookie; /* Cookie for new flow. */ | |
3915 | ovs_be16 flags; /* NX_LEARN_F_*. */ | |
3916 | uint8_t table_id; /* Table to insert flow entry. */ | |
3917 | uint8_t pad; /* Must be zero. */ | |
3918 | ovs_be16 fin_idle_timeout; /* Idle timeout after FIN, if nonzero. */ | |
3919 | ovs_be16 fin_hard_timeout; /* Hard timeout after FIN, if nonzero. */ | |
3920 | /* Followed by a sequence of flow_mod_spec elements, as described above, | |
3921 | * until the end of the action is reached. */ | |
3922 | }; | |
3923 | OFP_ASSERT(sizeof(struct nx_action_learn) == 32); | |
3924 | ||
3925 | static ovs_be16 | |
3926 | get_be16(const void **pp) | |
3927 | { | |
3928 | const ovs_be16 *p = *pp; | |
3929 | ovs_be16 value = *p; | |
3930 | *pp = p + 1; | |
3931 | return value; | |
3932 | } | |
3933 | ||
3934 | static ovs_be32 | |
3935 | get_be32(const void **pp) | |
3936 | { | |
3937 | const ovs_be32 *p = *pp; | |
3938 | ovs_be32 value = get_unaligned_be32(p); | |
3939 | *pp = p + 1; | |
3940 | return value; | |
3941 | } | |
3942 | ||
3943 | static void | |
3944 | get_subfield(int n_bits, const void **p, struct mf_subfield *sf) | |
3945 | { | |
3946 | sf->field = mf_from_nxm_header(ntohl(get_be32(p))); | |
3947 | sf->ofs = ntohs(get_be16(p)); | |
3948 | sf->n_bits = n_bits; | |
3949 | } | |
3950 | ||
3951 | static unsigned int | |
3952 | learn_min_len(uint16_t header) | |
3953 | { | |
3954 | int n_bits = header & NX_LEARN_N_BITS_MASK; | |
3955 | int src_type = header & NX_LEARN_SRC_MASK; | |
3956 | int dst_type = header & NX_LEARN_DST_MASK; | |
3957 | unsigned int min_len; | |
3958 | ||
3959 | min_len = 0; | |
3960 | if (src_type == NX_LEARN_SRC_FIELD) { | |
3961 | min_len += sizeof(ovs_be32); /* src_field */ | |
3962 | min_len += sizeof(ovs_be16); /* src_ofs */ | |
3963 | } else { | |
3964 | min_len += DIV_ROUND_UP(n_bits, 16); | |
3965 | } | |
3966 | if (dst_type == NX_LEARN_DST_MATCH || | |
3967 | dst_type == NX_LEARN_DST_LOAD) { | |
3968 | min_len += sizeof(ovs_be32); /* dst_field */ | |
3969 | min_len += sizeof(ovs_be16); /* dst_ofs */ | |
3970 | } | |
3971 | return min_len; | |
3972 | } | |
3973 | ||
3974 | /* Converts 'nal' into a "struct ofpact_learn" and appends that struct to | |
3975 | * 'ofpacts'. Returns 0 if successful, otherwise an OFPERR_*. */ | |
3976 | static enum ofperr | |
3977 | decode_NXAST_RAW_LEARN(const struct nx_action_learn *nal, | |
f3cd3ac7 | 3978 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
3979 | struct ofpbuf *ofpacts) |
3980 | { | |
3981 | struct ofpact_learn *learn; | |
3982 | const void *p, *end; | |
3983 | ||
3984 | if (nal->pad) { | |
3985 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3986 | } | |
3987 | ||
3988 | learn = ofpact_put_LEARN(ofpacts); | |
3989 | ||
3990 | learn->idle_timeout = ntohs(nal->idle_timeout); | |
3991 | learn->hard_timeout = ntohs(nal->hard_timeout); | |
3992 | learn->priority = ntohs(nal->priority); | |
3993 | learn->cookie = nal->cookie; | |
3994 | learn->table_id = nal->table_id; | |
3995 | learn->fin_idle_timeout = ntohs(nal->fin_idle_timeout); | |
3996 | learn->fin_hard_timeout = ntohs(nal->fin_hard_timeout); | |
3997 | ||
3998 | learn->flags = ntohs(nal->flags); | |
3999 | if (learn->flags & ~(NX_LEARN_F_SEND_FLOW_REM | | |
4000 | NX_LEARN_F_DELETE_LEARNED)) { | |
4001 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4002 | } | |
4003 | ||
4004 | if (learn->table_id == 0xff) { | |
4005 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4006 | } | |
4007 | ||
4008 | end = (char *) nal + ntohs(nal->len); | |
4009 | for (p = nal + 1; p != end; ) { | |
4010 | struct ofpact_learn_spec *spec; | |
4011 | uint16_t header = ntohs(get_be16(&p)); | |
4012 | ||
4013 | if (!header) { | |
4014 | break; | |
4015 | } | |
4016 | ||
4017 | spec = ofpbuf_put_zeros(ofpacts, sizeof *spec); | |
6fd6ed71 | 4018 | learn = ofpacts->header; |
c2d936a4 BP |
4019 | learn->n_specs++; |
4020 | ||
4021 | spec->src_type = header & NX_LEARN_SRC_MASK; | |
4022 | spec->dst_type = header & NX_LEARN_DST_MASK; | |
4023 | spec->n_bits = header & NX_LEARN_N_BITS_MASK; | |
4024 | ||
4025 | /* Check for valid src and dst type combination. */ | |
4026 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
4027 | spec->dst_type == NX_LEARN_DST_LOAD || | |
4028 | (spec->dst_type == NX_LEARN_DST_OUTPUT && | |
4029 | spec->src_type == NX_LEARN_SRC_FIELD)) { | |
4030 | /* OK. */ | |
4031 | } else { | |
4032 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4033 | } | |
4034 | ||
4035 | /* Check that the arguments don't overrun the end of the action. */ | |
4036 | if ((char *) end - (char *) p < learn_min_len(header)) { | |
4037 | return OFPERR_OFPBAC_BAD_LEN; | |
4038 | } | |
4039 | ||
4040 | /* Get the source. */ | |
4041 | if (spec->src_type == NX_LEARN_SRC_FIELD) { | |
4042 | get_subfield(spec->n_bits, &p, &spec->src); | |
4043 | } else { | |
4044 | int p_bytes = 2 * DIV_ROUND_UP(spec->n_bits, 16); | |
4045 | ||
4046 | bitwise_copy(p, p_bytes, 0, | |
4047 | &spec->src_imm, sizeof spec->src_imm, 0, | |
4048 | spec->n_bits); | |
4049 | p = (const uint8_t *) p + p_bytes; | |
4050 | } | |
4051 | ||
4052 | /* Get the destination. */ | |
4053 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
4054 | spec->dst_type == NX_LEARN_DST_LOAD) { | |
4055 | get_subfield(spec->n_bits, &p, &spec->dst); | |
4056 | } | |
4057 | } | |
4058 | ofpact_update_len(ofpacts, &learn->ofpact); | |
4059 | ||
4060 | if (!is_all_zeros(p, (char *) end - (char *) p)) { | |
4061 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4062 | } | |
4063 | ||
4064 | return 0; | |
4065 | } | |
4066 | ||
4067 | static void | |
4068 | put_be16(struct ofpbuf *b, ovs_be16 x) | |
4069 | { | |
4070 | ofpbuf_put(b, &x, sizeof x); | |
4071 | } | |
4072 | ||
4073 | static void | |
4074 | put_be32(struct ofpbuf *b, ovs_be32 x) | |
4075 | { | |
4076 | ofpbuf_put(b, &x, sizeof x); | |
4077 | } | |
4078 | ||
4079 | static void | |
4080 | put_u16(struct ofpbuf *b, uint16_t x) | |
4081 | { | |
4082 | put_be16(b, htons(x)); | |
4083 | } | |
4084 | ||
4085 | static void | |
4086 | put_u32(struct ofpbuf *b, uint32_t x) | |
4087 | { | |
4088 | put_be32(b, htonl(x)); | |
4089 | } | |
4090 | ||
4091 | static void | |
4092 | encode_LEARN(const struct ofpact_learn *learn, | |
4093 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4094 | { | |
4095 | const struct ofpact_learn_spec *spec; | |
4096 | struct nx_action_learn *nal; | |
4097 | size_t start_ofs; | |
4098 | ||
6fd6ed71 | 4099 | start_ofs = out->size; |
c2d936a4 BP |
4100 | nal = put_NXAST_LEARN(out); |
4101 | nal->idle_timeout = htons(learn->idle_timeout); | |
4102 | nal->hard_timeout = htons(learn->hard_timeout); | |
4103 | nal->fin_idle_timeout = htons(learn->fin_idle_timeout); | |
4104 | nal->fin_hard_timeout = htons(learn->fin_hard_timeout); | |
4105 | nal->priority = htons(learn->priority); | |
4106 | nal->cookie = learn->cookie; | |
4107 | nal->flags = htons(learn->flags); | |
4108 | nal->table_id = learn->table_id; | |
4109 | ||
4110 | for (spec = learn->specs; spec < &learn->specs[learn->n_specs]; spec++) { | |
4111 | put_u16(out, spec->n_bits | spec->dst_type | spec->src_type); | |
4112 | ||
4113 | if (spec->src_type == NX_LEARN_SRC_FIELD) { | |
508a9338 | 4114 | put_u32(out, mf_nxm_header(spec->src.field->id)); |
c2d936a4 BP |
4115 | put_u16(out, spec->src.ofs); |
4116 | } else { | |
4117 | size_t n_dst_bytes = 2 * DIV_ROUND_UP(spec->n_bits, 16); | |
4118 | uint8_t *bits = ofpbuf_put_zeros(out, n_dst_bytes); | |
4119 | bitwise_copy(&spec->src_imm, sizeof spec->src_imm, 0, | |
4120 | bits, n_dst_bytes, 0, | |
4121 | spec->n_bits); | |
4122 | } | |
4123 | ||
4124 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
4125 | spec->dst_type == NX_LEARN_DST_LOAD) { | |
508a9338 | 4126 | put_u32(out, mf_nxm_header(spec->dst.field->id)); |
c2d936a4 BP |
4127 | put_u16(out, spec->dst.ofs); |
4128 | } | |
4129 | } | |
4130 | ||
178742f9 | 4131 | pad_ofpat(out, start_ofs); |
c2d936a4 BP |
4132 | } |
4133 | ||
cab50449 | 4134 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4135 | parse_LEARN(char *arg, struct ofpbuf *ofpacts, |
4136 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4137 | { | |
4138 | return learn_parse(arg, ofpacts); | |
4139 | } | |
4140 | ||
4141 | static void | |
4142 | format_LEARN(const struct ofpact_learn *a, struct ds *s) | |
4143 | { | |
4144 | learn_format(a, s); | |
4145 | } | |
4146 | \f | |
18080541 BP |
4147 | /* Action structure for NXAST_CONJUNCTION. */ |
4148 | struct nx_action_conjunction { | |
4149 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4150 | ovs_be16 len; /* At least 16. */ | |
4151 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4152 | ovs_be16 subtype; /* See enum ofp_raw_action_type. */ | |
4153 | uint8_t clause; | |
4154 | uint8_t n_clauses; | |
4155 | ovs_be32 id; | |
4156 | }; | |
4157 | OFP_ASSERT(sizeof(struct nx_action_conjunction) == 16); | |
4158 | ||
4159 | static void | |
4160 | add_conjunction(struct ofpbuf *out, | |
4161 | uint32_t id, uint8_t clause, uint8_t n_clauses) | |
4162 | { | |
4163 | struct ofpact_conjunction *oc; | |
4164 | ||
4165 | oc = ofpact_put_CONJUNCTION(out); | |
4166 | oc->id = id; | |
4167 | oc->clause = clause; | |
4168 | oc->n_clauses = n_clauses; | |
4169 | } | |
4170 | ||
4171 | static enum ofperr | |
4172 | decode_NXAST_RAW_CONJUNCTION(const struct nx_action_conjunction *nac, | |
f3cd3ac7 | 4173 | enum ofp_version ofp_version OVS_UNUSED, |
18080541 BP |
4174 | struct ofpbuf *out) |
4175 | { | |
4176 | if (nac->n_clauses < 2 || nac->n_clauses > 64 | |
4177 | || nac->clause >= nac->n_clauses) { | |
4178 | return OFPERR_NXBAC_BAD_CONJUNCTION; | |
4179 | } else { | |
4180 | add_conjunction(out, ntohl(nac->id), nac->clause, nac->n_clauses); | |
4181 | return 0; | |
4182 | } | |
4183 | } | |
4184 | ||
4185 | static void | |
4186 | encode_CONJUNCTION(const struct ofpact_conjunction *oc, | |
4187 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4188 | { | |
4189 | struct nx_action_conjunction *nac = put_NXAST_CONJUNCTION(out); | |
4190 | nac->clause = oc->clause; | |
4191 | nac->n_clauses = oc->n_clauses; | |
4192 | nac->id = htonl(oc->id); | |
4193 | } | |
4194 | ||
4195 | static void | |
4196 | format_CONJUNCTION(const struct ofpact_conjunction *oc, struct ds *s) | |
4197 | { | |
4198 | ds_put_format(s, "conjunction(%"PRIu32",%"PRIu8"/%"PRIu8")", | |
4199 | oc->id, oc->clause + 1, oc->n_clauses); | |
4200 | } | |
4201 | ||
4202 | static char * OVS_WARN_UNUSED_RESULT | |
4203 | parse_CONJUNCTION(const char *arg, struct ofpbuf *ofpacts, | |
4204 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4205 | { | |
4206 | uint8_t n_clauses; | |
4207 | uint8_t clause; | |
4208 | uint32_t id; | |
4209 | int n; | |
4210 | ||
4211 | if (!ovs_scan(arg, "%"SCNi32" , %"SCNu8" / %"SCNu8" %n", | |
4212 | &id, &clause, &n_clauses, &n) || n != strlen(arg)) { | |
4213 | return xstrdup("\"conjunction\" syntax is \"conjunction(id,i/n)\""); | |
4214 | } | |
4215 | ||
4216 | if (n_clauses < 2) { | |
4217 | return xstrdup("conjunction must have at least 2 clauses"); | |
4218 | } else if (n_clauses > 64) { | |
4219 | return xstrdup("conjunction must have at most 64 clauses"); | |
4220 | } else if (clause < 1) { | |
4221 | return xstrdup("clause index must be positive"); | |
4222 | } else if (clause > n_clauses) { | |
4223 | return xstrdup("clause index must be less than or equal to " | |
4224 | "number of clauses"); | |
4225 | } | |
4226 | ||
4227 | add_conjunction(ofpacts, id, clause - 1, n_clauses); | |
4228 | return NULL; | |
4229 | } | |
4230 | \f | |
c2d936a4 BP |
4231 | /* Action structure for NXAST_MULTIPATH. |
4232 | * | |
4233 | * This action performs the following steps in sequence: | |
4234 | * | |
4235 | * 1. Hashes the fields designated by 'fields', one of NX_HASH_FIELDS_*. | |
4236 | * Refer to the definition of "enum nx_mp_fields" for details. | |
4237 | * | |
4238 | * The 'basis' value is used as a universal hash parameter, that is, | |
4239 | * different values of 'basis' yield different hash functions. The | |
4240 | * particular universal hash function used is implementation-defined. | |
4241 | * | |
4242 | * The hashed fields' values are drawn from the current state of the | |
4243 | * flow, including all modifications that have been made by actions up to | |
4244 | * this point. | |
4245 | * | |
4246 | * 2. Applies the multipath link choice algorithm specified by 'algorithm', | |
4247 | * one of NX_MP_ALG_*. Refer to the definition of "enum nx_mp_algorithm" | |
4248 | * for details. | |
4249 | * | |
4250 | * The output of the algorithm is 'link', an unsigned integer less than | |
4251 | * or equal to 'max_link'. | |
4252 | * | |
4253 | * Some algorithms use 'arg' as an additional argument. | |
4254 | * | |
4255 | * 3. Stores 'link' in dst[ofs:ofs+n_bits]. The format and semantics of | |
4256 | * 'dst' and 'ofs_nbits' are similar to those for the NXAST_REG_LOAD | |
4257 | * action. | |
4258 | * | |
4259 | * The switch will reject actions that have an unknown 'fields', or an unknown | |
4260 | * 'algorithm', or in which ofs+n_bits is greater than the width of 'dst', or | |
4261 | * in which 'max_link' is greater than or equal to 2**n_bits, with error type | |
4262 | * OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT. | |
4263 | */ | |
4264 | struct nx_action_multipath { | |
4265 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4266 | ovs_be16 len; /* Length is 32. */ | |
4267 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4268 | ovs_be16 subtype; /* NXAST_MULTIPATH. */ | |
4269 | ||
4270 | /* What fields to hash and how. */ | |
4271 | ovs_be16 fields; /* One of NX_HASH_FIELDS_*. */ | |
4272 | ovs_be16 basis; /* Universal hash parameter. */ | |
4273 | ovs_be16 pad0; | |
4274 | ||
4275 | /* Multipath link choice algorithm to apply to hash value. */ | |
4276 | ovs_be16 algorithm; /* One of NX_MP_ALG_*. */ | |
4277 | ovs_be16 max_link; /* Number of output links, minus 1. */ | |
4278 | ovs_be32 arg; /* Algorithm-specific argument. */ | |
4279 | ovs_be16 pad1; | |
4280 | ||
4281 | /* Where to store the result. */ | |
4282 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
4283 | ovs_be32 dst; /* Destination. */ | |
4284 | }; | |
4285 | OFP_ASSERT(sizeof(struct nx_action_multipath) == 32); | |
4286 | ||
4287 | static enum ofperr | |
4288 | decode_NXAST_RAW_MULTIPATH(const struct nx_action_multipath *nam, | |
f3cd3ac7 | 4289 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
4290 | struct ofpbuf *out) |
4291 | { | |
4292 | uint32_t n_links = ntohs(nam->max_link) + 1; | |
4293 | size_t min_n_bits = log_2_ceil(n_links); | |
4294 | struct ofpact_multipath *mp; | |
4295 | ||
4296 | mp = ofpact_put_MULTIPATH(out); | |
4297 | mp->fields = ntohs(nam->fields); | |
4298 | mp->basis = ntohs(nam->basis); | |
4299 | mp->algorithm = ntohs(nam->algorithm); | |
4300 | mp->max_link = ntohs(nam->max_link); | |
4301 | mp->arg = ntohl(nam->arg); | |
4302 | mp->dst.field = mf_from_nxm_header(ntohl(nam->dst)); | |
4303 | mp->dst.ofs = nxm_decode_ofs(nam->ofs_nbits); | |
4304 | mp->dst.n_bits = nxm_decode_n_bits(nam->ofs_nbits); | |
4305 | ||
4306 | if (!flow_hash_fields_valid(mp->fields)) { | |
4307 | VLOG_WARN_RL(&rl, "unsupported fields %d", (int) mp->fields); | |
4308 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4309 | } else if (mp->algorithm != NX_MP_ALG_MODULO_N | |
4310 | && mp->algorithm != NX_MP_ALG_HASH_THRESHOLD | |
4311 | && mp->algorithm != NX_MP_ALG_HRW | |
4312 | && mp->algorithm != NX_MP_ALG_ITER_HASH) { | |
4313 | VLOG_WARN_RL(&rl, "unsupported algorithm %d", (int) mp->algorithm); | |
4314 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4315 | } else if (mp->dst.n_bits < min_n_bits) { | |
4316 | VLOG_WARN_RL(&rl, "multipath action requires at least %"PRIuSIZE" bits for " | |
4317 | "%"PRIu32" links", min_n_bits, n_links); | |
4318 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4319 | } | |
4320 | ||
4321 | return multipath_check(mp, NULL); | |
4322 | } | |
4323 | ||
4324 | static void | |
4325 | encode_MULTIPATH(const struct ofpact_multipath *mp, | |
4326 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4327 | { | |
4328 | struct nx_action_multipath *nam = put_NXAST_MULTIPATH(out); | |
4329 | ||
4330 | nam->fields = htons(mp->fields); | |
4331 | nam->basis = htons(mp->basis); | |
4332 | nam->algorithm = htons(mp->algorithm); | |
4333 | nam->max_link = htons(mp->max_link); | |
4334 | nam->arg = htonl(mp->arg); | |
4335 | nam->ofs_nbits = nxm_encode_ofs_nbits(mp->dst.ofs, mp->dst.n_bits); | |
508a9338 | 4336 | nam->dst = htonl(mf_nxm_header(mp->dst.field->id)); |
c2d936a4 BP |
4337 | } |
4338 | ||
cab50449 | 4339 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4340 | parse_MULTIPATH(const char *arg, struct ofpbuf *ofpacts, |
4341 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4342 | { | |
4343 | return multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg); | |
4344 | } | |
4345 | ||
4346 | static void | |
4347 | format_MULTIPATH(const struct ofpact_multipath *a, struct ds *s) | |
4348 | { | |
4349 | multipath_format(a, s); | |
4350 | } | |
4351 | \f | |
4352 | /* Action structure for NXAST_NOTE. | |
4353 | * | |
4354 | * This action has no effect. It is variable length. The switch does not | |
4355 | * attempt to interpret the user-defined 'note' data in any way. A controller | |
4356 | * can use this action to attach arbitrary metadata to a flow. | |
4357 | * | |
4358 | * This action might go away in the future. | |
4359 | */ | |
4360 | struct nx_action_note { | |
4361 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4362 | ovs_be16 len; /* A multiple of 8, but at least 16. */ | |
4363 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4364 | ovs_be16 subtype; /* NXAST_NOTE. */ | |
4365 | uint8_t note[6]; /* Start of user-defined data. */ | |
4366 | /* Possibly followed by additional user-defined data. */ | |
4367 | }; | |
4368 | OFP_ASSERT(sizeof(struct nx_action_note) == 16); | |
4369 | ||
4370 | static enum ofperr | |
f3cd3ac7 JS |
4371 | decode_NXAST_RAW_NOTE(const struct nx_action_note *nan, |
4372 | enum ofp_version ofp_version OVS_UNUSED, | |
4373 | struct ofpbuf *out) | |
c2d936a4 BP |
4374 | { |
4375 | struct ofpact_note *note; | |
4376 | unsigned int length; | |
4377 | ||
4378 | length = ntohs(nan->len) - offsetof(struct nx_action_note, note); | |
4379 | note = ofpact_put(out, OFPACT_NOTE, | |
4380 | offsetof(struct ofpact_note, data) + length); | |
4381 | note->length = length; | |
4382 | memcpy(note->data, nan->note, length); | |
4383 | ||
4384 | return 0; | |
4385 | } | |
4386 | ||
4387 | static void | |
4388 | encode_NOTE(const struct ofpact_note *note, | |
4389 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4390 | { | |
6fd6ed71 | 4391 | size_t start_ofs = out->size; |
c2d936a4 | 4392 | struct nx_action_note *nan; |
c2d936a4 BP |
4393 | |
4394 | put_NXAST_NOTE(out); | |
6fd6ed71 | 4395 | out->size = out->size - sizeof nan->note; |
c2d936a4 BP |
4396 | |
4397 | ofpbuf_put(out, note->data, note->length); | |
9ac0aada | 4398 | pad_ofpat(out, start_ofs); |
c2d936a4 BP |
4399 | } |
4400 | ||
cab50449 | 4401 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4402 | parse_NOTE(const char *arg, struct ofpbuf *ofpacts, |
4403 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4404 | { | |
4405 | struct ofpact_note *note; | |
4406 | ||
4407 | note = ofpact_put_NOTE(ofpacts); | |
4408 | while (*arg != '\0') { | |
4409 | uint8_t byte; | |
4410 | bool ok; | |
4411 | ||
4412 | if (*arg == '.') { | |
4413 | arg++; | |
4414 | } | |
4415 | if (*arg == '\0') { | |
4416 | break; | |
4417 | } | |
4418 | ||
4419 | byte = hexits_value(arg, 2, &ok); | |
4420 | if (!ok) { | |
4421 | return xstrdup("bad hex digit in `note' argument"); | |
4422 | } | |
4423 | ofpbuf_put(ofpacts, &byte, 1); | |
4424 | ||
6fd6ed71 | 4425 | note = ofpacts->header; |
c2d936a4 BP |
4426 | note->length++; |
4427 | ||
4428 | arg += 2; | |
4429 | } | |
4430 | ofpact_update_len(ofpacts, ¬e->ofpact); | |
4431 | return NULL; | |
4432 | } | |
4433 | ||
4434 | static void | |
4435 | format_NOTE(const struct ofpact_note *a, struct ds *s) | |
4436 | { | |
4437 | size_t i; | |
4438 | ||
4439 | ds_put_cstr(s, "note:"); | |
4440 | for (i = 0; i < a->length; i++) { | |
4441 | if (i) { | |
4442 | ds_put_char(s, '.'); | |
4443 | } | |
4444 | ds_put_format(s, "%02"PRIx8, a->data[i]); | |
4445 | } | |
4446 | } | |
4447 | \f | |
4448 | /* Exit action. */ | |
4449 | ||
4450 | static enum ofperr | |
4451 | decode_NXAST_RAW_EXIT(struct ofpbuf *out) | |
4452 | { | |
4453 | ofpact_put_EXIT(out); | |
4454 | return 0; | |
4455 | } | |
4456 | ||
4457 | static void | |
4458 | encode_EXIT(const struct ofpact_null *null OVS_UNUSED, | |
4459 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4460 | { | |
4461 | put_NXAST_EXIT(out); | |
4462 | } | |
4463 | ||
cab50449 | 4464 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4465 | parse_EXIT(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
4466 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4467 | { | |
4468 | ofpact_put_EXIT(ofpacts); | |
4469 | return NULL; | |
4470 | } | |
4471 | ||
4472 | static void | |
4473 | format_EXIT(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
4474 | { | |
4475 | ds_put_cstr(s, "exit"); | |
4476 | } | |
4477 | \f | |
e672ff9b JR |
4478 | /* Unroll xlate action. */ |
4479 | ||
4480 | static void | |
4481 | encode_UNROLL_XLATE(const struct ofpact_unroll_xlate *unroll OVS_UNUSED, | |
4482 | enum ofp_version ofp_version OVS_UNUSED, | |
4483 | struct ofpbuf *out OVS_UNUSED) | |
4484 | { | |
4485 | OVS_NOT_REACHED(); | |
4486 | } | |
4487 | ||
4488 | static char * OVS_WARN_UNUSED_RESULT | |
4489 | parse_UNROLL_XLATE(char *arg OVS_UNUSED, struct ofpbuf *ofpacts OVS_UNUSED, | |
4490 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4491 | { | |
4492 | OVS_NOT_REACHED(); | |
4493 | return NULL; | |
4494 | } | |
4495 | ||
4496 | static void | |
4497 | format_UNROLL_XLATE(const struct ofpact_unroll_xlate *a OVS_UNUSED, | |
4498 | struct ds *s) | |
4499 | { | |
4500 | ds_put_cstr(s, "unroll_xlate"); | |
4501 | } | |
4502 | \f | |
c2d936a4 BP |
4503 | /* Action structure for NXAST_SAMPLE. |
4504 | * | |
4505 | * Samples matching packets with the given probability and sends them | |
4506 | * each to the set of collectors identified with the given ID. The | |
4507 | * probability is expressed as a number of packets to be sampled out | |
4508 | * of USHRT_MAX packets, and must be >0. | |
4509 | * | |
4510 | * When sending packet samples to IPFIX collectors, the IPFIX flow | |
4511 | * record sent for each sampled packet is associated with the given | |
4512 | * observation domain ID and observation point ID. Each IPFIX flow | |
4513 | * record contain the sampled packet's headers when executing this | |
4514 | * rule. If a sampled packet's headers are modified by previous | |
4515 | * actions in the flow, those modified headers are sent. */ | |
4516 | struct nx_action_sample { | |
4517 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4518 | ovs_be16 len; /* Length is 24. */ | |
4519 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4520 | ovs_be16 subtype; /* NXAST_SAMPLE. */ | |
4521 | ovs_be16 probability; /* Fraction of packets to sample. */ | |
4522 | ovs_be32 collector_set_id; /* ID of collector set in OVSDB. */ | |
4523 | ovs_be32 obs_domain_id; /* ID of sampling observation domain. */ | |
4524 | ovs_be32 obs_point_id; /* ID of sampling observation point. */ | |
4525 | }; | |
4526 | OFP_ASSERT(sizeof(struct nx_action_sample) == 24); | |
4527 | ||
4528 | static enum ofperr | |
f3cd3ac7 JS |
4529 | decode_NXAST_RAW_SAMPLE(const struct nx_action_sample *nas, |
4530 | enum ofp_version ofp_version OVS_UNUSED, | |
4531 | struct ofpbuf *out) | |
c2d936a4 BP |
4532 | { |
4533 | struct ofpact_sample *sample; | |
4534 | ||
4535 | sample = ofpact_put_SAMPLE(out); | |
4536 | sample->probability = ntohs(nas->probability); | |
4537 | sample->collector_set_id = ntohl(nas->collector_set_id); | |
4538 | sample->obs_domain_id = ntohl(nas->obs_domain_id); | |
4539 | sample->obs_point_id = ntohl(nas->obs_point_id); | |
4540 | ||
4541 | if (sample->probability == 0) { | |
4542 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4543 | } | |
4544 | ||
4545 | return 0; | |
4546 | } | |
4547 | ||
4548 | static void | |
4549 | encode_SAMPLE(const struct ofpact_sample *sample, | |
4550 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4551 | { | |
4552 | struct nx_action_sample *nas; | |
4553 | ||
4554 | nas = put_NXAST_SAMPLE(out); | |
4555 | nas->probability = htons(sample->probability); | |
4556 | nas->collector_set_id = htonl(sample->collector_set_id); | |
4557 | nas->obs_domain_id = htonl(sample->obs_domain_id); | |
4558 | nas->obs_point_id = htonl(sample->obs_point_id); | |
4559 | } | |
4560 | ||
4561 | /* Parses 'arg' as the argument to a "sample" action, and appends such an | |
4562 | * action to 'ofpacts'. | |
4563 | * | |
4564 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
4565 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 4566 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4567 | parse_SAMPLE(char *arg, struct ofpbuf *ofpacts, |
4568 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4569 | { | |
4570 | struct ofpact_sample *os = ofpact_put_SAMPLE(ofpacts); | |
4571 | char *key, *value; | |
4572 | ||
4573 | while (ofputil_parse_key_value(&arg, &key, &value)) { | |
4574 | char *error = NULL; | |
4575 | ||
4576 | if (!strcmp(key, "probability")) { | |
4577 | error = str_to_u16(value, "probability", &os->probability); | |
4578 | if (!error && os->probability == 0) { | |
4579 | error = xasprintf("invalid probability value \"%s\"", value); | |
4580 | } | |
4581 | } else if (!strcmp(key, "collector_set_id")) { | |
4582 | error = str_to_u32(value, &os->collector_set_id); | |
4583 | } else if (!strcmp(key, "obs_domain_id")) { | |
4584 | error = str_to_u32(value, &os->obs_domain_id); | |
4585 | } else if (!strcmp(key, "obs_point_id")) { | |
4586 | error = str_to_u32(value, &os->obs_point_id); | |
4587 | } else { | |
4588 | error = xasprintf("invalid key \"%s\" in \"sample\" argument", | |
4589 | key); | |
4590 | } | |
4591 | if (error) { | |
4592 | return error; | |
4593 | } | |
4594 | } | |
4595 | if (os->probability == 0) { | |
4596 | return xstrdup("non-zero \"probability\" must be specified on sample"); | |
4597 | } | |
4598 | return NULL; | |
4599 | } | |
4600 | ||
4601 | static void | |
4602 | format_SAMPLE(const struct ofpact_sample *a, struct ds *s) | |
4603 | { | |
4604 | ds_put_format(s, "sample(probability=%"PRIu16",collector_set_id=%"PRIu32 | |
4605 | ",obs_domain_id=%"PRIu32",obs_point_id=%"PRIu32")", | |
4606 | a->probability, a->collector_set_id, | |
4607 | a->obs_domain_id, a->obs_point_id); | |
4608 | } | |
4609 | \f | |
d4abaff5 BP |
4610 | /* debug_recirc instruction. */ |
4611 | ||
4612 | static bool enable_debug; | |
4613 | ||
4614 | void | |
4615 | ofpact_dummy_enable(void) | |
4616 | { | |
4617 | enable_debug = true; | |
4618 | } | |
4619 | ||
4620 | static enum ofperr | |
4621 | decode_NXAST_RAW_DEBUG_RECIRC(struct ofpbuf *out) | |
4622 | { | |
4623 | if (!enable_debug) { | |
4624 | return OFPERR_OFPBAC_BAD_VENDOR_TYPE; | |
4625 | } | |
4626 | ||
4627 | ofpact_put_DEBUG_RECIRC(out); | |
4628 | return 0; | |
4629 | } | |
4630 | ||
4631 | static void | |
4632 | encode_DEBUG_RECIRC(const struct ofpact_null *n OVS_UNUSED, | |
4633 | enum ofp_version ofp_version OVS_UNUSED, | |
4634 | struct ofpbuf *out) | |
4635 | { | |
4636 | put_NXAST_DEBUG_RECIRC(out); | |
4637 | } | |
4638 | ||
4639 | static char * OVS_WARN_UNUSED_RESULT | |
4640 | parse_DEBUG_RECIRC(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, | |
4641 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4642 | { | |
4643 | ofpact_put_DEBUG_RECIRC(ofpacts); | |
4644 | return NULL; | |
4645 | } | |
4646 | ||
4647 | static void | |
4648 | format_DEBUG_RECIRC(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
4649 | { | |
4650 | ds_put_cstr(s, "debug_recirc"); | |
4651 | } | |
07659514 JS |
4652 | |
4653 | /* Action structure for NXAST_CT. | |
4654 | * | |
4655 | * Pass traffic to the connection tracker. | |
4656 | * | |
4657 | * There are two important concepts to understanding the connection tracking | |
4658 | * interface: Packet state and Connection state. Packets may be "Untracked" or | |
4659 | * "Tracked". Connections may be "Uncommitted" or "Committed". | |
4660 | * | |
4661 | * - Packet State: | |
4662 | * | |
4663 | * Untracked packets have not yet passed through the connection tracker, | |
4664 | * and the connection state for such packets is unknown. In most cases, | |
4665 | * packets entering the OpenFlow pipeline will initially be in the | |
4666 | * untracked state. Untracked packets may become tracked by executing | |
4667 | * NXAST_CT with a "recirc_table" specified. This makes various aspects | |
4668 | * about the connection available, in particular the connection state. | |
4669 | * | |
4670 | * Tracked packets have previously passed through the connection tracker. | |
4671 | * These packets will remain tracked through until the end of the OpenFlow | |
4672 | * pipeline. Tracked packets which have NXAST_CT executed with a | |
4673 | * "recirc_table" specified will return to the tracked state. | |
4674 | * | |
4675 | * The packet state is only significant for the duration of packet | |
4676 | * processing within the OpenFlow pipeline. | |
4677 | * | |
4678 | * - Connection State: | |
4679 | * | |
4680 | * Multiple packets may be associated with a single connection. Initially, | |
4681 | * all connections are uncommitted. The connection state corresponding to | |
4682 | * a packet is available in the NXM_NX_CT_STATE field for tracked packets. | |
4683 | * | |
4684 | * Uncommitted connections have no state stored about them. Uncommitted | |
4685 | * connections may transition into the committed state by executing | |
4686 | * NXAST_CT with the NX_CT_F_COMMIT flag. | |
4687 | * | |
4688 | * Once a connection becomes committed, information may be gathered about | |
4689 | * the connection by passing subsequent packets through the connection | |
4690 | * tracker, and the state of the connection will be stored beyond the | |
4691 | * lifetime of packet processing. | |
4692 | * | |
4693 | * Connections may transition back into the uncommitted state due to | |
4694 | * external timers, or due to the contents of packets that are sent to the | |
4695 | * connection tracker. This behaviour is outside of the scope of the | |
4696 | * OpenFlow interface. | |
4697 | * | |
4698 | * The "zone" specifies a context within which the tracking is done: | |
4699 | * | |
4700 | * The connection tracking zone is a 16-bit number. Each zone is an | |
4701 | * independent connection tracking context. The connection state for each | |
4702 | * connection is completely separate for each zone, so if a connection | |
4703 | * is committed to zone A, then it will remain uncommitted in zone B. | |
4704 | * If NXAST_CT is executed with the same zone multiple times, later | |
4705 | * executions have no effect. | |
4706 | * | |
4707 | * If 'zone_src' is nonzero, this specifies that the zone should be | |
4708 | * sourced from a field zone_src[ofs:ofs+nbits]. The format and semantics | |
4709 | * of 'zone_src' and 'zone_ofs_nbits' are similar to those for the | |
4710 | * NXAST_REG_LOAD action. The acceptable nxm_header values for 'zone_src' | |
4711 | * are the same as the acceptable nxm_header values for the 'src' field of | |
4712 | * NXAST_REG_MOVE. | |
4713 | * | |
4714 | * If 'zone_src' is zero, then the value of 'zone_imm' will be used as the | |
4715 | * connection tracking zone. | |
4716 | * | |
4717 | * The "recirc_table" allows NXM_NX_CT_* fields to become available: | |
4718 | * | |
4719 | * If "recirc_table" has a value other than NX_CT_RECIRC_NONE, then the | |
4720 | * packet will be logically cloned prior to executing this action. One | |
4721 | * copy will be sent to the connection tracker, then will be re-injected | |
4722 | * into the OpenFlow pipeline beginning at the OpenFlow table specified in | |
4723 | * this field. When the packet re-enters the pipeline, the NXM_NX_CT_* | |
4724 | * fields will be populated. The original instance of the packet will | |
4725 | * continue the current actions list. This can be thought of as similar to | |
4726 | * the effect of the "output" action: One copy is sent out (in this case, | |
4727 | * to the connection tracker), but the current copy continues processing. | |
4728 | * | |
4729 | * It is strongly recommended that this table is later than the current | |
4730 | * table, to prevent loops. | |
8e53fe8c | 4731 | * |
d787ad39 JS |
4732 | * The "alg" attaches protocol-specific behaviour to this action: |
4733 | * | |
4734 | * The ALG is a 16-bit number which specifies that additional | |
4735 | * processing should be applied to this traffic. | |
4736 | * | |
4737 | * Protocol | Value | Meaning | |
4738 | * -------------------------------------------------------------------- | |
4739 | * None | 0 | No protocol-specific behaviour. | |
4740 | * FTP | 21 | Parse FTP control connections and observe the | |
4741 | * | | negotiation of related data connections. | |
4742 | * Other | Other | Unsupported protocols. | |
4743 | * | |
4744 | * By way of example, if FTP control connections have this action applied | |
4745 | * with the ALG set to FTP (21), then the connection tracker will observe | |
4746 | * the negotiation of data connections. This allows the connection | |
4747 | * tracker to identify subsequent data connections as "related" to this | |
4748 | * existing connection. The "related" flag will be populated in the | |
4749 | * NXM_NX_CT_STATE field for such connections if the 'recirc_table' is | |
4750 | * specified. | |
4751 | * | |
8e53fe8c JS |
4752 | * Zero or more actions may immediately follow this action. These actions will |
4753 | * be executed within the context of the connection tracker, and they require | |
4754 | * the NX_CT_F_COMMIT flag to be set. | |
07659514 JS |
4755 | */ |
4756 | struct nx_action_conntrack { | |
4757 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4758 | ovs_be16 len; /* At least 24. */ | |
4759 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4760 | ovs_be16 subtype; /* NXAST_CT. */ | |
4761 | ovs_be16 flags; /* Zero or more NX_CT_F_* flags. | |
4762 | * Unspecified flag bits must be zero. */ | |
4763 | ovs_be32 zone_src; /* Connection tracking context. */ | |
4764 | union { | |
4765 | ovs_be16 zone_ofs_nbits;/* Range to use from source field. */ | |
4766 | ovs_be16 zone_imm; /* Immediate value for zone. */ | |
4767 | }; | |
4768 | uint8_t recirc_table; /* Recirculate to a specific table, or | |
4769 | NX_CT_RECIRC_NONE for no recirculation. */ | |
d787ad39 JS |
4770 | uint8_t pad[3]; /* Zeroes */ |
4771 | ovs_be16 alg; /* Well-known port number for the protocol. | |
4772 | * 0 indicates no ALG is required. */ | |
07659514 JS |
4773 | /* Followed by a sequence of zero or more OpenFlow actions. The length of |
4774 | * these is included in 'len'. */ | |
4775 | }; | |
4776 | OFP_ASSERT(sizeof(struct nx_action_conntrack) == 24); | |
4777 | ||
4778 | static enum ofperr | |
4779 | decode_ct_zone(const struct nx_action_conntrack *nac, | |
4780 | struct ofpact_conntrack *out) | |
4781 | { | |
4782 | if (nac->zone_src) { | |
4783 | enum ofperr error; | |
4784 | ||
4785 | out->zone_src.field = mf_from_nxm_header(ntohl(nac->zone_src)); | |
4786 | out->zone_src.ofs = nxm_decode_ofs(nac->zone_ofs_nbits); | |
4787 | out->zone_src.n_bits = nxm_decode_n_bits(nac->zone_ofs_nbits); | |
4788 | error = mf_check_src(&out->zone_src, NULL); | |
4789 | if (error) { | |
4790 | return error; | |
4791 | } | |
4792 | ||
4793 | if (out->zone_src.n_bits != 16) { | |
4794 | VLOG_WARN_RL(&rl, "zone n_bits %d not within valid range [16..16]", | |
4795 | out->zone_src.n_bits); | |
4796 | return OFPERR_OFPBAC_BAD_SET_LEN; | |
4797 | } | |
4798 | } else { | |
4799 | out->zone_src.field = NULL; | |
4800 | out->zone_imm = ntohs(nac->zone_imm); | |
4801 | } | |
4802 | ||
4803 | return 0; | |
4804 | } | |
4805 | ||
4806 | static enum ofperr | |
4807 | decode_NXAST_RAW_CT(const struct nx_action_conntrack *nac, | |
8e53fe8c | 4808 | enum ofp_version ofp_version, struct ofpbuf *out) |
07659514 | 4809 | { |
8e53fe8c | 4810 | const size_t ct_offset = ofpacts_pull(out); |
07659514 | 4811 | struct ofpact_conntrack *conntrack; |
8e53fe8c | 4812 | struct ofpbuf openflow; |
07659514 JS |
4813 | int error = 0; |
4814 | ||
4815 | conntrack = ofpact_put_CT(out); | |
4816 | conntrack->flags = ntohs(nac->flags); | |
4817 | error = decode_ct_zone(nac, conntrack); | |
4818 | if (error) { | |
4819 | goto out; | |
4820 | } | |
4821 | conntrack->recirc_table = nac->recirc_table; | |
d787ad39 | 4822 | conntrack->alg = ntohs(nac->alg); |
07659514 | 4823 | |
8e53fe8c JS |
4824 | ofpbuf_pull(out, sizeof(*conntrack)); |
4825 | ||
4826 | ofpbuf_use_const(&openflow, nac + 1, ntohs(nac->len) - sizeof(*nac)); | |
4827 | error = ofpacts_pull_openflow_actions__(&openflow, openflow.size, | |
4828 | ofp_version, | |
4829 | 1u << OVSINST_OFPIT11_APPLY_ACTIONS, | |
4830 | out, OFPACT_CT); | |
4831 | if (error) { | |
4832 | goto out; | |
4833 | } | |
4834 | ||
4835 | conntrack = ofpbuf_push_uninit(out, sizeof(*conntrack)); | |
4836 | out->header = &conntrack->ofpact; | |
4837 | ofpact_update_len(out, &conntrack->ofpact); | |
4838 | ||
4839 | if (conntrack->ofpact.len > sizeof(*conntrack) | |
4840 | && !(conntrack->flags & NX_CT_F_COMMIT)) { | |
9ac0aada JR |
4841 | const struct ofpact *a; |
4842 | size_t ofpacts_len = conntrack->ofpact.len - sizeof(*conntrack); | |
4843 | ||
4844 | OFPACT_FOR_EACH (a, conntrack->actions, ofpacts_len) { | |
4845 | if (a->type != OFPACT_NAT || ofpact_get_NAT(a)->flags | |
4846 | || ofpact_get_NAT(a)->range_af != AF_UNSPEC) { | |
4847 | VLOG_WARN_RL(&rl, "CT action requires commit flag if actions " | |
4848 | "other than NAT without arguments are specified."); | |
4849 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
4850 | goto out; | |
4851 | } | |
4852 | } | |
8e53fe8c JS |
4853 | } |
4854 | ||
07659514 | 4855 | out: |
8e53fe8c | 4856 | ofpbuf_push_uninit(out, ct_offset); |
07659514 JS |
4857 | return error; |
4858 | } | |
4859 | ||
4860 | static void | |
4861 | encode_CT(const struct ofpact_conntrack *conntrack, | |
8e53fe8c | 4862 | enum ofp_version ofp_version, struct ofpbuf *out) |
07659514 JS |
4863 | { |
4864 | struct nx_action_conntrack *nac; | |
8e53fe8c JS |
4865 | const size_t ofs = out->size; |
4866 | size_t len; | |
07659514 JS |
4867 | |
4868 | nac = put_NXAST_CT(out); | |
4869 | nac->flags = htons(conntrack->flags); | |
4870 | if (conntrack->zone_src.field) { | |
4871 | nac->zone_src = htonl(mf_nxm_header(conntrack->zone_src.field->id)); | |
4872 | nac->zone_ofs_nbits = nxm_encode_ofs_nbits(conntrack->zone_src.ofs, | |
4873 | conntrack->zone_src.n_bits); | |
4874 | } else { | |
4875 | nac->zone_src = htonl(0); | |
4876 | nac->zone_imm = htons(conntrack->zone_imm); | |
4877 | } | |
4878 | nac->recirc_table = conntrack->recirc_table; | |
d787ad39 | 4879 | nac->alg = htons(conntrack->alg); |
8e53fe8c JS |
4880 | |
4881 | len = ofpacts_put_openflow_actions(conntrack->actions, | |
4882 | ofpact_ct_get_action_len(conntrack), | |
4883 | out, ofp_version); | |
4884 | len += sizeof(*nac); | |
4885 | nac = ofpbuf_at(out, ofs, sizeof(*nac)); | |
4886 | nac->len = htons(len); | |
07659514 JS |
4887 | } |
4888 | ||
9ac0aada JR |
4889 | static char * OVS_WARN_UNUSED_RESULT parse_NAT(char *arg, struct ofpbuf *, |
4890 | enum ofputil_protocol * OVS_UNUSED); | |
4891 | ||
07659514 JS |
4892 | /* Parses 'arg' as the argument to a "ct" action, and appends such an |
4893 | * action to 'ofpacts'. | |
4894 | * | |
4895 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
4896 | * error. The caller is responsible for freeing the returned string. */ | |
4897 | static char * OVS_WARN_UNUSED_RESULT | |
4898 | parse_CT(char *arg, struct ofpbuf *ofpacts, | |
8e53fe8c | 4899 | enum ofputil_protocol *usable_protocols) |
07659514 | 4900 | { |
8e53fe8c | 4901 | const size_t ct_offset = ofpacts_pull(ofpacts); |
07659514 JS |
4902 | struct ofpact_conntrack *oc; |
4903 | char *error = NULL; | |
4904 | char *key, *value; | |
4905 | ||
4906 | oc = ofpact_put_CT(ofpacts); | |
4907 | oc->flags = 0; | |
4908 | oc->recirc_table = NX_CT_RECIRC_NONE; | |
4909 | while (ofputil_parse_key_value(&arg, &key, &value)) { | |
4910 | if (!strcmp(key, "commit")) { | |
4911 | oc->flags |= NX_CT_F_COMMIT; | |
4912 | } else if (!strcmp(key, "table")) { | |
4913 | error = str_to_u8(value, "recirc_table", &oc->recirc_table); | |
4914 | if (!error && oc->recirc_table == NX_CT_RECIRC_NONE) { | |
4915 | error = xasprintf("invalid table %#"PRIx16, oc->recirc_table); | |
4916 | } | |
4917 | } else if (!strcmp(key, "zone")) { | |
4918 | error = str_to_u16(value, "zone", &oc->zone_imm); | |
4919 | ||
4920 | if (error) { | |
4921 | free(error); | |
4922 | error = mf_parse_subfield(&oc->zone_src, value); | |
4923 | if (error) { | |
4924 | return error; | |
4925 | } | |
4926 | } | |
d787ad39 JS |
4927 | } else if (!strcmp(key, "alg")) { |
4928 | error = str_to_connhelper(value, &oc->alg); | |
9ac0aada JR |
4929 | } else if (!strcmp(key, "nat")) { |
4930 | const size_t nat_offset = ofpacts_pull(ofpacts); | |
4931 | ||
4932 | error = parse_NAT(value, ofpacts, usable_protocols); | |
4933 | ofpact_pad(ofpacts); | |
4934 | /* Update CT action pointer and length. */ | |
4935 | ofpacts->header = ofpbuf_push_uninit(ofpacts, nat_offset); | |
4936 | oc = ofpacts->header; | |
8e53fe8c JS |
4937 | } else if (!strcmp(key, "exec")) { |
4938 | /* Hide existing actions from ofpacts_parse_copy(), so the | |
4939 | * nesting can be handled transparently. */ | |
76e3e669 | 4940 | enum ofputil_protocol usable_protocols2; |
9ac0aada | 4941 | const size_t exec_offset = ofpacts_pull(ofpacts); |
76e3e669 | 4942 | |
76e3e669 JR |
4943 | /* Initializes 'usable_protocol2', fold it back to |
4944 | * '*usable_protocols' afterwards, so that we do not lose | |
4945 | * restrictions already in there. */ | |
4946 | error = ofpacts_parse_copy(value, ofpacts, &usable_protocols2, | |
4947 | false, OFPACT_CT); | |
4948 | *usable_protocols &= usable_protocols2; | |
8e53fe8c | 4949 | ofpact_pad(ofpacts); |
9ac0aada | 4950 | ofpacts->header = ofpbuf_push_uninit(ofpacts, exec_offset); |
8e53fe8c | 4951 | oc = ofpacts->header; |
07659514 JS |
4952 | } else { |
4953 | error = xasprintf("invalid argument to \"ct\" action: `%s'", key); | |
4954 | } | |
4955 | if (error) { | |
4956 | break; | |
4957 | } | |
4958 | } | |
4959 | ||
8e53fe8c JS |
4960 | ofpact_update_len(ofpacts, &oc->ofpact); |
4961 | ofpbuf_push_uninit(ofpacts, ct_offset); | |
07659514 JS |
4962 | return error; |
4963 | } | |
4964 | ||
d787ad39 JS |
4965 | static void |
4966 | format_alg(int port, struct ds *s) | |
4967 | { | |
4968 | if (port == IPPORT_FTP) { | |
4969 | ds_put_format(s, "alg=ftp,"); | |
4970 | } else if (port) { | |
4971 | ds_put_format(s, "alg=%d,", port); | |
4972 | } | |
4973 | } | |
4974 | ||
9ac0aada JR |
4975 | static void format_NAT(const struct ofpact_nat *a, struct ds *ds); |
4976 | ||
07659514 JS |
4977 | static void |
4978 | format_CT(const struct ofpact_conntrack *a, struct ds *s) | |
4979 | { | |
4980 | ds_put_cstr(s, "ct("); | |
4981 | if (a->flags & NX_CT_F_COMMIT) { | |
4982 | ds_put_cstr(s, "commit,"); | |
4983 | } | |
4984 | if (a->recirc_table != NX_CT_RECIRC_NONE) { | |
4985 | ds_put_format(s, "table=%"PRIu8",", a->recirc_table); | |
4986 | } | |
4987 | if (a->zone_src.field) { | |
4988 | ds_put_format(s, "zone="); | |
4989 | mf_format_subfield(&a->zone_src, s); | |
4990 | ds_put_char(s, ','); | |
4991 | } else if (a->zone_imm) { | |
4992 | ds_put_format(s, "zone=%"PRIu16",", a->zone_imm); | |
4993 | } | |
9ac0aada JR |
4994 | /* If the first action is a NAT action, format it outside of the 'exec' |
4995 | * envelope. */ | |
4996 | const struct ofpact *action = a->actions; | |
4997 | size_t actions_len = ofpact_ct_get_action_len(a); | |
4998 | if (actions_len && action->type == OFPACT_NAT) { | |
4999 | format_NAT(ofpact_get_NAT(action), s); | |
5000 | ds_put_char(s, ','); | |
5001 | actions_len -= OFPACT_ALIGN(action->len); | |
5002 | action = ofpact_next(action); | |
5003 | } | |
5004 | if (actions_len) { | |
8e53fe8c | 5005 | ds_put_cstr(s, "exec("); |
9ac0aada JR |
5006 | ofpacts_format(action, actions_len, s); |
5007 | ds_put_cstr(s, "),"); | |
8e53fe8c | 5008 | } |
d787ad39 | 5009 | format_alg(a->alg, s); |
07659514 JS |
5010 | ds_chomp(s, ','); |
5011 | ds_put_char(s, ')'); | |
5012 | } | |
9ac0aada JR |
5013 | \f |
5014 | /* NAT action. */ | |
5015 | ||
5016 | /* Which optional fields are present? */ | |
5017 | enum nx_nat_range { | |
5018 | NX_NAT_RANGE_IPV4_MIN = 1 << 0, /* ovs_be32 */ | |
5019 | NX_NAT_RANGE_IPV4_MAX = 1 << 1, /* ovs_be32 */ | |
5020 | NX_NAT_RANGE_IPV6_MIN = 1 << 2, /* struct in6_addr */ | |
5021 | NX_NAT_RANGE_IPV6_MAX = 1 << 3, /* struct in6_addr */ | |
5022 | NX_NAT_RANGE_PROTO_MIN = 1 << 4, /* ovs_be16 */ | |
5023 | NX_NAT_RANGE_PROTO_MAX = 1 << 5, /* ovs_be16 */ | |
5024 | }; | |
5025 | ||
5026 | /* Action structure for NXAST_NAT. */ | |
5027 | struct nx_action_nat { | |
5028 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
5029 | ovs_be16 len; /* At least 16. */ | |
5030 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
5031 | ovs_be16 subtype; /* NXAST_NAT. */ | |
5032 | uint8_t pad[2]; /* Must be zero. */ | |
5033 | ovs_be16 flags; /* Zero or more NX_NAT_F_* flags. | |
5034 | * Unspecified flag bits must be zero. */ | |
5035 | ovs_be16 range_present; /* NX_NAT_RANGE_* */ | |
5036 | /* Followed by optional parameters as specified by 'range_present' */ | |
5037 | }; | |
5038 | OFP_ASSERT(sizeof(struct nx_action_nat) == 16); | |
5039 | ||
5040 | static void | |
5041 | encode_NAT(const struct ofpact_nat *nat, | |
5042 | enum ofp_version ofp_version OVS_UNUSED, | |
5043 | struct ofpbuf *out) | |
5044 | { | |
5045 | struct nx_action_nat *nan; | |
5046 | const size_t ofs = out->size; | |
5047 | uint16_t range_present = 0; | |
5048 | ||
5049 | nan = put_NXAST_NAT(out); | |
5050 | nan->flags = htons(nat->flags); | |
5051 | if (nat->range_af == AF_INET) { | |
5052 | if (nat->range.addr.ipv4.min) { | |
5053 | ovs_be32 *min = ofpbuf_put_uninit(out, sizeof *min); | |
5054 | *min = nat->range.addr.ipv4.min; | |
5055 | range_present |= NX_NAT_RANGE_IPV4_MIN; | |
5056 | } | |
5057 | if (nat->range.addr.ipv4.max) { | |
5058 | ovs_be32 *max = ofpbuf_put_uninit(out, sizeof *max); | |
5059 | *max = nat->range.addr.ipv4.max; | |
5060 | range_present |= NX_NAT_RANGE_IPV4_MAX; | |
5061 | } | |
5062 | } else if (nat->range_af == AF_INET6) { | |
5063 | if (!ipv6_mask_is_any(&nat->range.addr.ipv6.min)) { | |
5064 | struct in6_addr *min = ofpbuf_put_uninit(out, sizeof *min); | |
5065 | *min = nat->range.addr.ipv6.min; | |
5066 | range_present |= NX_NAT_RANGE_IPV6_MIN; | |
5067 | } | |
5068 | if (!ipv6_mask_is_any(&nat->range.addr.ipv6.max)) { | |
5069 | struct in6_addr *max = ofpbuf_put_uninit(out, sizeof *max); | |
5070 | *max = nat->range.addr.ipv6.max; | |
5071 | range_present |= NX_NAT_RANGE_IPV6_MAX; | |
5072 | } | |
5073 | } | |
5074 | if (nat->range_af != AF_UNSPEC) { | |
5075 | if (nat->range.proto.min) { | |
5076 | ovs_be16 *min = ofpbuf_put_uninit(out, sizeof *min); | |
5077 | *min = htons(nat->range.proto.min); | |
5078 | range_present |= NX_NAT_RANGE_PROTO_MIN; | |
5079 | } | |
5080 | if (nat->range.proto.max) { | |
5081 | ovs_be16 *max = ofpbuf_put_uninit(out, sizeof *max); | |
5082 | *max = htons(nat->range.proto.max); | |
5083 | range_present |= NX_NAT_RANGE_PROTO_MAX; | |
5084 | } | |
5085 | } | |
5086 | pad_ofpat(out, ofs); | |
5087 | nan = ofpbuf_at(out, ofs, sizeof *nan); | |
5088 | nan->range_present = htons(range_present); | |
5089 | } | |
5090 | ||
5091 | static enum ofperr | |
5092 | decode_NXAST_RAW_NAT(const struct nx_action_nat *nan, | |
5093 | enum ofp_version ofp_version OVS_UNUSED, | |
5094 | struct ofpbuf *out) | |
5095 | { | |
5096 | struct ofpact_nat *nat; | |
5097 | uint16_t range_present = ntohs(nan->range_present); | |
5098 | const char *opts = (char *)(nan + 1); | |
5099 | uint16_t len = ntohs(nan->len) - sizeof *nan; | |
5100 | ||
5101 | nat = ofpact_put_NAT(out); | |
5102 | nat->flags = ntohs(nan->flags); | |
5103 | ||
5104 | #define NX_NAT_GET_OPT(DST, SRC, LEN, TYPE) \ | |
5105 | (LEN >= sizeof(TYPE) \ | |
5106 | ? (memcpy(DST, SRC, sizeof(TYPE)), LEN -= sizeof(TYPE), \ | |
5107 | SRC += sizeof(TYPE)) \ | |
5108 | : NULL) | |
5109 | ||
5110 | nat->range_af = AF_UNSPEC; | |
5111 | if (range_present & NX_NAT_RANGE_IPV4_MIN) { | |
5112 | if (range_present & (NX_NAT_RANGE_IPV6_MIN | NX_NAT_RANGE_IPV6_MAX)) { | |
5113 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5114 | } | |
5115 | ||
5116 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv4.min, opts, len, ovs_be32) | |
5117 | || !nat->range.addr.ipv4.min) { | |
5118 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5119 | } | |
5120 | ||
5121 | nat->range_af = AF_INET; | |
5122 | ||
5123 | if (range_present & NX_NAT_RANGE_IPV4_MAX) { | |
5124 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv4.max, opts, len, | |
5125 | ovs_be32)) { | |
5126 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5127 | } | |
5128 | if (ntohl(nat->range.addr.ipv4.max) | |
5129 | < ntohl(nat->range.addr.ipv4.min)) { | |
5130 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5131 | } | |
5132 | } | |
5133 | } else if (range_present & NX_NAT_RANGE_IPV4_MAX) { | |
5134 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5135 | } else if (range_present & NX_NAT_RANGE_IPV6_MIN) { | |
5136 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv6.min, opts, len, | |
5137 | struct in6_addr) | |
5138 | || ipv6_mask_is_any(&nat->range.addr.ipv6.min)) { | |
5139 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5140 | } | |
5141 | ||
5142 | nat->range_af = AF_INET6; | |
5143 | ||
5144 | if (range_present & NX_NAT_RANGE_IPV6_MAX) { | |
5145 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv6.max, opts, len, | |
5146 | struct in6_addr)) { | |
5147 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5148 | } | |
5149 | if (memcmp(&nat->range.addr.ipv6.max, &nat->range.addr.ipv6.min, | |
5150 | sizeof(struct in6_addr)) < 0) { | |
5151 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5152 | } | |
5153 | } | |
5154 | } else if (range_present & NX_NAT_RANGE_IPV6_MAX) { | |
5155 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5156 | } | |
5157 | ||
5158 | if (range_present & NX_NAT_RANGE_PROTO_MIN) { | |
5159 | ovs_be16 proto; | |
5160 | ||
5161 | if (nat->range_af == AF_UNSPEC) { | |
5162 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5163 | } | |
5164 | if (!NX_NAT_GET_OPT(&proto, opts, len, ovs_be16) || proto == 0) { | |
5165 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5166 | } | |
5167 | nat->range.proto.min = ntohs(proto); | |
5168 | if (range_present & NX_NAT_RANGE_PROTO_MAX) { | |
5169 | if (!NX_NAT_GET_OPT(&proto, opts, len, ovs_be16)) { | |
5170 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5171 | } | |
5172 | nat->range.proto.max = ntohs(proto); | |
5173 | if (nat->range.proto.max < nat->range.proto.min) { | |
5174 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5175 | } | |
5176 | } | |
5177 | } else if (range_present & NX_NAT_RANGE_PROTO_MAX) { | |
5178 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5179 | } | |
5180 | ||
5181 | return 0; | |
5182 | } | |
5183 | ||
5184 | static void | |
5185 | format_NAT(const struct ofpact_nat *a, struct ds *ds) | |
5186 | { | |
5187 | ds_put_cstr(ds, "nat"); | |
5188 | ||
5189 | if (a->flags & (NX_NAT_F_SRC | NX_NAT_F_DST)) { | |
5190 | ds_put_char(ds, '('); | |
5191 | ds_put_cstr(ds, a->flags & NX_NAT_F_SRC ? "src" : "dst"); | |
5192 | ||
5193 | if (a->range_af != AF_UNSPEC) { | |
5194 | ds_put_cstr(ds, "="); | |
5195 | ||
5196 | if (a->range_af == AF_INET) { | |
5197 | ds_put_format(ds, IP_FMT, IP_ARGS(a->range.addr.ipv4.min)); | |
5198 | ||
5199 | if (a->range.addr.ipv4.max | |
5200 | && a->range.addr.ipv4.max != a->range.addr.ipv4.min) { | |
5201 | ds_put_format(ds, "-"IP_FMT, | |
5202 | IP_ARGS(a->range.addr.ipv4.max)); | |
5203 | } | |
5204 | } else if (a->range_af == AF_INET6) { | |
5205 | ipv6_format_addr_bracket(&a->range.addr.ipv6.min, ds, | |
5206 | a->range.proto.min); | |
5207 | ||
5208 | if (!ipv6_mask_is_any(&a->range.addr.ipv6.max) | |
5209 | && memcmp(&a->range.addr.ipv6.max, &a->range.addr.ipv6.min, | |
5210 | sizeof(struct in6_addr)) != 0) { | |
5211 | ds_put_char(ds, '-'); | |
5212 | ipv6_format_addr_bracket(&a->range.addr.ipv6.max, ds, | |
5213 | a->range.proto.min); | |
5214 | } | |
5215 | } | |
5216 | if (a->range.proto.min) { | |
5217 | ds_put_char(ds, ':'); | |
5218 | ds_put_format(ds, "%"PRIu16, a->range.proto.min); | |
5219 | ||
5220 | if (a->range.proto.max | |
5221 | && a->range.proto.max != a->range.proto.min) { | |
5222 | ds_put_format(ds, "-%"PRIu16, a->range.proto.max); | |
5223 | } | |
5224 | } | |
5225 | ds_put_char(ds, ','); | |
5226 | ||
5227 | if (a->flags & NX_NAT_F_PERSISTENT) { | |
5228 | ds_put_cstr(ds, "persistent,"); | |
5229 | } | |
5230 | if (a->flags & NX_NAT_F_PROTO_HASH) { | |
5231 | ds_put_cstr(ds, "hash,"); | |
5232 | } | |
5233 | if (a->flags & NX_NAT_F_PROTO_RANDOM) { | |
5234 | ds_put_cstr(ds, "random,"); | |
5235 | } | |
5236 | } | |
5237 | ds_chomp(ds, ','); | |
5238 | ds_put_char(ds, ')'); | |
5239 | } | |
5240 | } | |
5241 | ||
5242 | static char * OVS_WARN_UNUSED_RESULT | |
5243 | str_to_nat_range(const char *s, struct ofpact_nat *on) | |
5244 | { | |
5245 | char ipv6_s[IPV6_SCAN_LEN + 1]; | |
5246 | int n = 0; | |
5247 | ||
5248 | on->range_af = AF_UNSPEC; | |
5249 | if (ovs_scan_len(s, &n, IP_SCAN_FMT, | |
5250 | IP_SCAN_ARGS(&on->range.addr.ipv4.min))) { | |
5251 | on->range_af = AF_INET; | |
5252 | ||
5253 | if (s[n] == '-') { | |
5254 | n++; | |
5255 | if (!ovs_scan_len(s, &n, IP_SCAN_FMT, | |
5256 | IP_SCAN_ARGS(&on->range.addr.ipv4.max)) | |
5257 | || (ntohl(on->range.addr.ipv4.max) | |
5258 | < ntohl(on->range.addr.ipv4.min))) { | |
5259 | goto error; | |
5260 | } | |
5261 | } | |
5262 | } else if ((ovs_scan_len(s, &n, IPV6_SCAN_FMT, ipv6_s) | |
5263 | || ovs_scan_len(s, &n, "["IPV6_SCAN_FMT"]", ipv6_s)) | |
5264 | && inet_pton(AF_INET6, ipv6_s, &on->range.addr.ipv6.min) == 1) { | |
5265 | on->range_af = AF_INET6; | |
5266 | ||
5267 | if (s[n] == '-') { | |
5268 | n++; | |
5269 | if (!(ovs_scan_len(s, &n, IPV6_SCAN_FMT, ipv6_s) | |
5270 | || ovs_scan_len(s, &n, "["IPV6_SCAN_FMT"]", ipv6_s)) | |
5271 | || inet_pton(AF_INET6, ipv6_s, &on->range.addr.ipv6.max) != 1 | |
5272 | || memcmp(&on->range.addr.ipv6.max, &on->range.addr.ipv6.min, | |
5273 | sizeof on->range.addr.ipv6.max) < 0) { | |
5274 | goto error; | |
5275 | } | |
5276 | } | |
5277 | } | |
5278 | if (on->range_af != AF_UNSPEC && s[n] == ':') { | |
5279 | n++; | |
5280 | if (!ovs_scan_len(s, &n, "%"SCNu16, &on->range.proto.min)) { | |
5281 | goto error; | |
5282 | } | |
5283 | if (s[n] == '-') { | |
5284 | n++; | |
5285 | if (!ovs_scan_len(s, &n, "%"SCNu16, &on->range.proto.max) | |
5286 | || on->range.proto.max < on->range.proto.min) { | |
5287 | goto error; | |
5288 | } | |
5289 | } | |
5290 | } | |
5291 | if (strlen(s) != n) { | |
5292 | return xasprintf("garbage (%s) after nat range \"%s\" (pos: %d)", | |
5293 | &s[n], s, n); | |
5294 | } | |
5295 | return NULL; | |
5296 | error: | |
5297 | return xasprintf("invalid nat range \"%s\"", s); | |
5298 | } | |
5299 | ||
5300 | ||
5301 | /* Parses 'arg' as the argument to a "nat" action, and appends such an | |
5302 | * action to 'ofpacts'. | |
5303 | * | |
5304 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
5305 | * error. The caller is responsible for freeing the returned string. */ | |
5306 | static char * OVS_WARN_UNUSED_RESULT | |
5307 | parse_NAT(char *arg, struct ofpbuf *ofpacts, | |
5308 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
5309 | { | |
5310 | struct ofpact_nat *on = ofpact_put_NAT(ofpacts); | |
5311 | char *key, *value; | |
5312 | ||
5313 | on->flags = 0; | |
5314 | on->range_af = AF_UNSPEC; | |
5315 | ||
5316 | while (ofputil_parse_key_value(&arg, &key, &value)) { | |
5317 | char *error = NULL; | |
5318 | ||
5319 | if (!strcmp(key, "src")) { | |
5320 | on->flags |= NX_NAT_F_SRC; | |
5321 | error = str_to_nat_range(value, on); | |
5322 | } else if (!strcmp(key, "dst")) { | |
5323 | on->flags |= NX_NAT_F_DST; | |
5324 | error = str_to_nat_range(value, on); | |
5325 | } else if (!strcmp(key, "persistent")) { | |
5326 | on->flags |= NX_NAT_F_PERSISTENT; | |
5327 | } else if (!strcmp(key, "hash")) { | |
5328 | on->flags |= NX_NAT_F_PROTO_HASH; | |
5329 | } else if (!strcmp(key, "random")) { | |
5330 | on->flags |= NX_NAT_F_PROTO_RANDOM; | |
5331 | } else { | |
5332 | error = xasprintf("invalid key \"%s\" in \"nat\" argument", | |
5333 | key); | |
5334 | } | |
5335 | if (error) { | |
5336 | return error; | |
5337 | } | |
5338 | } | |
5339 | if (on->flags & NX_NAT_F_SRC && on->flags & NX_NAT_F_DST) { | |
5340 | return xasprintf("May only specify one of \"snat\" or \"dnat\"."); | |
5341 | } | |
5342 | if (!(on->flags & NX_NAT_F_SRC || on->flags & NX_NAT_F_DST)) { | |
5343 | if (on->flags) { | |
5344 | return xasprintf("Flags allowed only with \"snat\" or \"dnat\"."); | |
5345 | } | |
5346 | if (on->range_af != AF_UNSPEC) { | |
5347 | return xasprintf("Range allowed only with \"snat\" or \"dnat\"."); | |
5348 | } | |
5349 | } | |
5350 | return NULL; | |
5351 | } | |
5352 | ||
d4abaff5 | 5353 | \f |
c2d936a4 BP |
5354 | /* Meter instruction. */ |
5355 | ||
5356 | static void | |
5357 | encode_METER(const struct ofpact_meter *meter, | |
5358 | enum ofp_version ofp_version, struct ofpbuf *out) | |
5359 | { | |
5360 | if (ofp_version >= OFP13_VERSION) { | |
5361 | instruction_put_OFPIT13_METER(out)->meter_id = htonl(meter->meter_id); | |
5362 | } | |
5363 | } | |
5364 | ||
cab50449 | 5365 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5366 | parse_METER(char *arg, struct ofpbuf *ofpacts, |
5367 | enum ofputil_protocol *usable_protocols) | |
5368 | { | |
5369 | *usable_protocols &= OFPUTIL_P_OF13_UP; | |
5370 | return str_to_u32(arg, &ofpact_put_METER(ofpacts)->meter_id); | |
5371 | } | |
5372 | ||
5373 | static void | |
5374 | format_METER(const struct ofpact_meter *a, struct ds *s) | |
5375 | { | |
5376 | ds_put_format(s, "meter:%"PRIu32, a->meter_id); | |
5377 | } | |
5378 | \f | |
5379 | /* Clear-Actions instruction. */ | |
5380 | ||
5381 | static void | |
5382 | encode_CLEAR_ACTIONS(const struct ofpact_null *null OVS_UNUSED, | |
5383 | enum ofp_version ofp_version OVS_UNUSED, | |
5384 | struct ofpbuf *out OVS_UNUSED) | |
5385 | { | |
5386 | if (ofp_version > OFP10_VERSION) { | |
5387 | instruction_put_OFPIT11_CLEAR_ACTIONS(out); | |
5388 | } | |
5389 | } | |
5390 | ||
cab50449 | 5391 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5392 | parse_CLEAR_ACTIONS(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
5393 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
5394 | { | |
5395 | ofpact_put_CLEAR_ACTIONS(ofpacts); | |
5396 | return NULL; | |
5397 | } | |
5398 | ||
5399 | static void | |
5400 | format_CLEAR_ACTIONS(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
5401 | { | |
5402 | ds_put_cstr(s, "clear_actions"); | |
5403 | } | |
5404 | \f | |
5405 | /* Write-Actions instruction. */ | |
5406 | ||
5407 | static void | |
5408 | encode_WRITE_ACTIONS(const struct ofpact_nest *actions, | |
5409 | enum ofp_version ofp_version, struct ofpbuf *out) | |
5410 | { | |
5411 | if (ofp_version > OFP10_VERSION) { | |
6fd6ed71 | 5412 | const size_t ofs = out->size; |
c2d936a4 BP |
5413 | |
5414 | instruction_put_OFPIT11_WRITE_ACTIONS(out); | |
5415 | ofpacts_put_openflow_actions(actions->actions, | |
5416 | ofpact_nest_get_action_len(actions), | |
5417 | out, ofp_version); | |
5418 | ofpacts_update_instruction_actions(out, ofs); | |
5419 | } | |
5420 | } | |
5421 | ||
cab50449 | 5422 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5423 | parse_WRITE_ACTIONS(char *arg, struct ofpbuf *ofpacts, |
5424 | enum ofputil_protocol *usable_protocols) | |
5425 | { | |
d824b5b7 | 5426 | size_t ofs = ofpacts_pull(ofpacts); |
c2d936a4 BP |
5427 | struct ofpact_nest *on; |
5428 | char *error; | |
c2d936a4 BP |
5429 | |
5430 | /* Add a Write-Actions instruction and then pull it off. */ | |
5431 | ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS, sizeof *on); | |
5432 | ofpbuf_pull(ofpacts, sizeof *on); | |
5433 | ||
5434 | /* Parse nested actions. | |
5435 | * | |
5436 | * We pulled off "write-actions" and the previous actions because the | |
5437 | * OFPACT_WRITE_ACTIONS is only partially constructed: its length is such | |
5438 | * that it doesn't actually include the nested actions. That means that | |
5439 | * ofpacts_parse() would reject them as being part of an Apply-Actions that | |
5440 | * follows a Write-Actions, which is an invalid order. */ | |
d824b5b7 JS |
5441 | error = ofpacts_parse(arg, ofpacts, usable_protocols, false, |
5442 | OFPACT_WRITE_ACTIONS); | |
c2d936a4 BP |
5443 | |
5444 | /* Put the Write-Actions back on and update its length. */ | |
5445 | on = ofpbuf_push_uninit(ofpacts, sizeof *on); | |
6fd6ed71 | 5446 | on->ofpact.len = ofpacts->size; |
c2d936a4 BP |
5447 | |
5448 | /* Put any previous actions or instructions back on. */ | |
5449 | ofpbuf_push_uninit(ofpacts, ofs); | |
5450 | ||
5451 | return error; | |
5452 | } | |
5453 | ||
5454 | static void | |
5455 | format_WRITE_ACTIONS(const struct ofpact_nest *a, struct ds *s) | |
5456 | { | |
5457 | ds_put_cstr(s, "write_actions("); | |
5458 | ofpacts_format(a->actions, ofpact_nest_get_action_len(a), s); | |
5459 | ds_put_char(s, ')'); | |
5460 | } | |
5461 | \f | |
5462 | /* Action structure for NXAST_WRITE_METADATA. | |
5463 | * | |
5464 | * Modifies the 'mask' bits of the metadata value. */ | |
5465 | struct nx_action_write_metadata { | |
5466 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
5467 | ovs_be16 len; /* Length is 32. */ | |
5468 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
5469 | ovs_be16 subtype; /* NXAST_WRITE_METADATA. */ | |
5470 | uint8_t zeros[6]; /* Must be zero. */ | |
5471 | ovs_be64 metadata; /* Metadata register. */ | |
5472 | ovs_be64 mask; /* Metadata mask. */ | |
5473 | }; | |
5474 | OFP_ASSERT(sizeof(struct nx_action_write_metadata) == 32); | |
5475 | ||
5476 | static enum ofperr | |
5477 | decode_NXAST_RAW_WRITE_METADATA(const struct nx_action_write_metadata *nawm, | |
f3cd3ac7 | 5478 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
5479 | struct ofpbuf *out) |
5480 | { | |
5481 | struct ofpact_metadata *om; | |
5482 | ||
5483 | if (!is_all_zeros(nawm->zeros, sizeof nawm->zeros)) { | |
5484 | return OFPERR_NXBRC_MUST_BE_ZERO; | |
5485 | } | |
5486 | ||
5487 | om = ofpact_put_WRITE_METADATA(out); | |
5488 | om->metadata = nawm->metadata; | |
5489 | om->mask = nawm->mask; | |
5490 | ||
5491 | return 0; | |
5492 | } | |
5493 | ||
5494 | static void | |
5495 | encode_WRITE_METADATA(const struct ofpact_metadata *metadata, | |
5496 | enum ofp_version ofp_version, struct ofpbuf *out) | |
5497 | { | |
5498 | if (ofp_version == OFP10_VERSION) { | |
5499 | struct nx_action_write_metadata *nawm; | |
5500 | ||
5501 | nawm = put_NXAST_WRITE_METADATA(out); | |
5502 | nawm->metadata = metadata->metadata; | |
5503 | nawm->mask = metadata->mask; | |
5504 | } else { | |
5505 | struct ofp11_instruction_write_metadata *oiwm; | |
5506 | ||
5507 | oiwm = instruction_put_OFPIT11_WRITE_METADATA(out); | |
5508 | oiwm->metadata = metadata->metadata; | |
5509 | oiwm->metadata_mask = metadata->mask; | |
5510 | } | |
5511 | } | |
5512 | ||
cab50449 | 5513 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5514 | parse_WRITE_METADATA(char *arg, struct ofpbuf *ofpacts, |
5515 | enum ofputil_protocol *usable_protocols) | |
5516 | { | |
5517 | struct ofpact_metadata *om; | |
5518 | char *mask = strchr(arg, '/'); | |
5519 | ||
5520 | *usable_protocols &= OFPUTIL_P_NXM_OF11_UP; | |
5521 | ||
5522 | om = ofpact_put_WRITE_METADATA(ofpacts); | |
5523 | if (mask) { | |
5524 | char *error; | |
5525 | ||
5526 | *mask = '\0'; | |
5527 | error = str_to_be64(mask + 1, &om->mask); | |
5528 | if (error) { | |
5529 | return error; | |
5530 | } | |
5531 | } else { | |
5532 | om->mask = OVS_BE64_MAX; | |
5533 | } | |
5534 | ||
5535 | return str_to_be64(arg, &om->metadata); | |
5536 | } | |
5537 | ||
5538 | static void | |
5539 | format_WRITE_METADATA(const struct ofpact_metadata *a, struct ds *s) | |
5540 | { | |
5541 | ds_put_format(s, "write_metadata:%#"PRIx64, ntohll(a->metadata)); | |
5542 | if (a->mask != OVS_BE64_MAX) { | |
5543 | ds_put_format(s, "/%#"PRIx64, ntohll(a->mask)); | |
5544 | } | |
4cceacb9 | 5545 | } |
f25d0cf3 | 5546 | \f |
c2d936a4 | 5547 | /* Goto-Table instruction. */ |
f25d0cf3 BP |
5548 | |
5549 | static void | |
c2d936a4 BP |
5550 | encode_GOTO_TABLE(const struct ofpact_goto_table *goto_table, |
5551 | enum ofp_version ofp_version, struct ofpbuf *out) | |
f25d0cf3 | 5552 | { |
c2d936a4 BP |
5553 | if (ofp_version == OFP10_VERSION) { |
5554 | struct nx_action_resubmit *nar; | |
f25d0cf3 | 5555 | |
c2d936a4 BP |
5556 | nar = put_NXAST_RESUBMIT_TABLE(out); |
5557 | nar->table = goto_table->table_id; | |
5558 | nar->in_port = htons(ofp_to_u16(OFPP_IN_PORT)); | |
5559 | } else { | |
5560 | struct ofp11_instruction_goto_table *oigt; | |
5561 | ||
5562 | oigt = instruction_put_OFPIT11_GOTO_TABLE(out); | |
5563 | oigt->table_id = goto_table->table_id; | |
5564 | memset(oigt->pad, 0, sizeof oigt->pad); | |
5565 | } | |
5566 | } | |
5567 | ||
cab50449 | 5568 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5569 | parse_GOTO_TABLE(char *arg, struct ofpbuf *ofpacts, |
5570 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
5571 | { | |
5572 | struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts); | |
5573 | char *table_s = strsep(&arg, ","); | |
5574 | if (!table_s || !table_s[0]) { | |
5575 | return xstrdup("instruction goto-table needs table id"); | |
5576 | } | |
5577 | return str_to_u8(table_s, "table", &ogt->table_id); | |
5578 | } | |
5579 | ||
5580 | static void | |
5581 | format_GOTO_TABLE(const struct ofpact_goto_table *a, struct ds *s) | |
5582 | { | |
5583 | ds_put_format(s, "goto_table:%"PRIu8, a->table_id); | |
5584 | } | |
5585 | \f | |
5586 | static void | |
5ad4b3f8 | 5587 | log_bad_action(const struct ofp_action_header *actions, size_t actions_len, |
c2d936a4 BP |
5588 | const struct ofp_action_header *bad_action, enum ofperr error) |
5589 | { | |
5590 | if (!VLOG_DROP_WARN(&rl)) { | |
5591 | struct ds s; | |
5592 | ||
5593 | ds_init(&s); | |
5ad4b3f8 | 5594 | ds_put_hex_dump(&s, actions, actions_len, 0, false); |
c2d936a4 BP |
5595 | VLOG_WARN("bad action at offset %#"PRIxPTR" (%s):\n%s", |
5596 | (char *)bad_action - (char *)actions, | |
5597 | ofperr_get_name(error), ds_cstr(&s)); | |
5598 | ds_destroy(&s); | |
5599 | } | |
5600 | } | |
5601 | ||
5602 | static enum ofperr | |
5603 | ofpacts_decode(const void *actions, size_t actions_len, | |
5604 | enum ofp_version ofp_version, struct ofpbuf *ofpacts) | |
5605 | { | |
5606 | struct ofpbuf openflow; | |
5607 | ||
5608 | ofpbuf_use_const(&openflow, actions, actions_len); | |
6fd6ed71 PS |
5609 | while (openflow.size) { |
5610 | const struct ofp_action_header *action = openflow.data; | |
c2d936a4 BP |
5611 | enum ofp_raw_action_type raw; |
5612 | enum ofperr error; | |
5613 | uint64_t arg; | |
5614 | ||
5615 | error = ofpact_pull_raw(&openflow, ofp_version, &raw, &arg); | |
5616 | if (!error) { | |
f3cd3ac7 | 5617 | error = ofpact_decode(action, raw, ofp_version, arg, ofpacts); |
c2d936a4 BP |
5618 | } |
5619 | ||
5620 | if (error) { | |
5ad4b3f8 | 5621 | log_bad_action(actions, actions_len, action, error); |
c2d936a4 BP |
5622 | return error; |
5623 | } | |
5624 | } | |
5625 | ||
5626 | ofpact_pad(ofpacts); | |
5627 | return 0; | |
5628 | } | |
5629 | ||
5630 | static enum ofperr | |
5631 | ofpacts_pull_openflow_actions__(struct ofpbuf *openflow, | |
5632 | unsigned int actions_len, | |
5633 | enum ofp_version version, | |
5634 | uint32_t allowed_ovsinsts, | |
d824b5b7 JS |
5635 | struct ofpbuf *ofpacts, |
5636 | enum ofpact_type outer_action) | |
c2d936a4 BP |
5637 | { |
5638 | const struct ofp_action_header *actions; | |
5639 | enum ofperr error; | |
5640 | ||
d824b5b7 JS |
5641 | if (!outer_action) { |
5642 | ofpbuf_clear(ofpacts); | |
5643 | } | |
c2d936a4 BP |
5644 | |
5645 | if (actions_len % OFP_ACTION_ALIGN != 0) { | |
5646 | VLOG_WARN_RL(&rl, "OpenFlow message actions length %u is not a " | |
5647 | "multiple of %d", actions_len, OFP_ACTION_ALIGN); | |
5648 | return OFPERR_OFPBRC_BAD_LEN; | |
5649 | } | |
5650 | ||
5651 | actions = ofpbuf_try_pull(openflow, actions_len); | |
5652 | if (actions == NULL) { | |
5653 | VLOG_WARN_RL(&rl, "OpenFlow message actions length %u exceeds " | |
5654 | "remaining message length (%"PRIu32")", | |
6fd6ed71 | 5655 | actions_len, openflow->size); |
c2d936a4 BP |
5656 | return OFPERR_OFPBRC_BAD_LEN; |
5657 | } | |
5658 | ||
5659 | error = ofpacts_decode(actions, actions_len, version, ofpacts); | |
5660 | if (error) { | |
5661 | ofpbuf_clear(ofpacts); | |
5662 | return error; | |
5663 | } | |
5664 | ||
d824b5b7 JS |
5665 | error = ofpacts_verify(ofpacts->data, ofpacts->size, allowed_ovsinsts, |
5666 | outer_action); | |
c2d936a4 BP |
5667 | if (error) { |
5668 | ofpbuf_clear(ofpacts); | |
5669 | } | |
5670 | return error; | |
5671 | } | |
5672 | ||
5673 | /* Attempts to convert 'actions_len' bytes of OpenFlow actions from the | |
5674 | * front of 'openflow' into ofpacts. On success, replaces any existing content | |
5675 | * in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'. | |
5676 | * Returns 0 if successful, otherwise an OpenFlow error. | |
5677 | * | |
5678 | * Actions are processed according to their OpenFlow version which | |
5679 | * is provided in the 'version' parameter. | |
5680 | * | |
5681 | * In most places in OpenFlow, actions appear encapsulated in instructions, so | |
5682 | * you should call ofpacts_pull_openflow_instructions() instead of this | |
5683 | * function. | |
5684 | * | |
5685 | * The parsed actions are valid generically, but they may not be valid in a | |
5686 | * specific context. For example, port numbers up to OFPP_MAX are valid | |
5687 | * generically, but specific datapaths may only support port numbers in a | |
5688 | * smaller range. Use ofpacts_check() to additional check whether actions are | |
5689 | * valid in a specific context. */ | |
5690 | enum ofperr | |
5691 | ofpacts_pull_openflow_actions(struct ofpbuf *openflow, | |
5692 | unsigned int actions_len, | |
5693 | enum ofp_version version, | |
5694 | struct ofpbuf *ofpacts) | |
5695 | { | |
5696 | return ofpacts_pull_openflow_actions__(openflow, actions_len, version, | |
5697 | 1u << OVSINST_OFPIT11_APPLY_ACTIONS, | |
d824b5b7 | 5698 | ofpacts, 0); |
c2d936a4 BP |
5699 | } |
5700 | \f | |
5701 | /* OpenFlow 1.1 actions. */ | |
5702 | ||
5703 | ||
5704 | /* True if an action sets the value of a field | |
5705 | * in a way that is compatibile with the action set. | |
1b0ee636 | 5706 | * The field can be set via either a set or a move action. |
c2d936a4 BP |
5707 | * False otherwise. */ |
5708 | static bool | |
1b0ee636 | 5709 | ofpact_is_set_or_move_action(const struct ofpact *a) |
c2d936a4 BP |
5710 | { |
5711 | switch (a->type) { | |
5712 | case OFPACT_SET_FIELD: | |
1b0ee636 | 5713 | case OFPACT_REG_MOVE: |
c2d936a4 BP |
5714 | case OFPACT_SET_ETH_DST: |
5715 | case OFPACT_SET_ETH_SRC: | |
5716 | case OFPACT_SET_IP_DSCP: | |
5717 | case OFPACT_SET_IP_ECN: | |
5718 | case OFPACT_SET_IP_TTL: | |
5719 | case OFPACT_SET_IPV4_DST: | |
5720 | case OFPACT_SET_IPV4_SRC: | |
5721 | case OFPACT_SET_L4_DST_PORT: | |
5722 | case OFPACT_SET_L4_SRC_PORT: | |
5723 | case OFPACT_SET_MPLS_LABEL: | |
5724 | case OFPACT_SET_MPLS_TC: | |
5725 | case OFPACT_SET_MPLS_TTL: | |
5726 | case OFPACT_SET_QUEUE: | |
5727 | case OFPACT_SET_TUNNEL: | |
5728 | case OFPACT_SET_VLAN_PCP: | |
5729 | case OFPACT_SET_VLAN_VID: | |
5730 | return true; | |
5731 | case OFPACT_BUNDLE: | |
5732 | case OFPACT_CLEAR_ACTIONS: | |
07659514 | 5733 | case OFPACT_CT: |
9ac0aada | 5734 | case OFPACT_NAT: |
c2d936a4 BP |
5735 | case OFPACT_CONTROLLER: |
5736 | case OFPACT_DEC_MPLS_TTL: | |
5737 | case OFPACT_DEC_TTL: | |
5738 | case OFPACT_ENQUEUE: | |
5739 | case OFPACT_EXIT: | |
e672ff9b | 5740 | case OFPACT_UNROLL_XLATE: |
c2d936a4 BP |
5741 | case OFPACT_FIN_TIMEOUT: |
5742 | case OFPACT_GOTO_TABLE: | |
5743 | case OFPACT_GROUP: | |
5744 | case OFPACT_LEARN: | |
18080541 | 5745 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
5746 | case OFPACT_METER: |
5747 | case OFPACT_MULTIPATH: | |
5748 | case OFPACT_NOTE: | |
5749 | case OFPACT_OUTPUT: | |
5750 | case OFPACT_OUTPUT_REG: | |
5751 | case OFPACT_POP_MPLS: | |
5752 | case OFPACT_POP_QUEUE: | |
5753 | case OFPACT_PUSH_MPLS: | |
5754 | case OFPACT_PUSH_VLAN: | |
c2d936a4 BP |
5755 | case OFPACT_RESUBMIT: |
5756 | case OFPACT_SAMPLE: | |
5757 | case OFPACT_STACK_POP: | |
5758 | case OFPACT_STACK_PUSH: | |
5759 | case OFPACT_STRIP_VLAN: | |
5760 | case OFPACT_WRITE_ACTIONS: | |
5761 | case OFPACT_WRITE_METADATA: | |
d4abaff5 | 5762 | case OFPACT_DEBUG_RECIRC: |
c2d936a4 BP |
5763 | return false; |
5764 | default: | |
5765 | OVS_NOT_REACHED(); | |
5766 | } | |
5767 | } | |
5768 | ||
5769 | /* True if an action is allowed in the action set. | |
5770 | * False otherwise. */ | |
5771 | static bool | |
5772 | ofpact_is_allowed_in_actions_set(const struct ofpact *a) | |
5773 | { | |
5774 | switch (a->type) { | |
5775 | case OFPACT_DEC_MPLS_TTL: | |
5776 | case OFPACT_DEC_TTL: | |
5777 | case OFPACT_GROUP: | |
5778 | case OFPACT_OUTPUT: | |
5779 | case OFPACT_POP_MPLS: | |
5780 | case OFPACT_PUSH_MPLS: | |
5781 | case OFPACT_PUSH_VLAN: | |
1b0ee636 | 5782 | case OFPACT_REG_MOVE: |
c2d936a4 BP |
5783 | case OFPACT_SET_FIELD: |
5784 | case OFPACT_SET_ETH_DST: | |
5785 | case OFPACT_SET_ETH_SRC: | |
5786 | case OFPACT_SET_IP_DSCP: | |
5787 | case OFPACT_SET_IP_ECN: | |
5788 | case OFPACT_SET_IP_TTL: | |
5789 | case OFPACT_SET_IPV4_DST: | |
5790 | case OFPACT_SET_IPV4_SRC: | |
5791 | case OFPACT_SET_L4_DST_PORT: | |
5792 | case OFPACT_SET_L4_SRC_PORT: | |
5793 | case OFPACT_SET_MPLS_LABEL: | |
5794 | case OFPACT_SET_MPLS_TC: | |
5795 | case OFPACT_SET_MPLS_TTL: | |
5796 | case OFPACT_SET_QUEUE: | |
5797 | case OFPACT_SET_TUNNEL: | |
5798 | case OFPACT_SET_VLAN_PCP: | |
5799 | case OFPACT_SET_VLAN_VID: | |
5800 | case OFPACT_STRIP_VLAN: | |
5801 | return true; | |
5802 | ||
5803 | /* In general these actions are excluded because they are not part of | |
5804 | * the OpenFlow specification nor map to actions that are defined in | |
5805 | * the specification. Thus the order in which they should be applied | |
5806 | * in the action set is undefined. */ | |
5807 | case OFPACT_BUNDLE: | |
5808 | case OFPACT_CONTROLLER: | |
07659514 | 5809 | case OFPACT_CT: |
9ac0aada | 5810 | case OFPACT_NAT: |
c2d936a4 BP |
5811 | case OFPACT_ENQUEUE: |
5812 | case OFPACT_EXIT: | |
e672ff9b | 5813 | case OFPACT_UNROLL_XLATE: |
c2d936a4 BP |
5814 | case OFPACT_FIN_TIMEOUT: |
5815 | case OFPACT_LEARN: | |
18080541 | 5816 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
5817 | case OFPACT_MULTIPATH: |
5818 | case OFPACT_NOTE: | |
5819 | case OFPACT_OUTPUT_REG: | |
5820 | case OFPACT_POP_QUEUE: | |
c2d936a4 BP |
5821 | case OFPACT_RESUBMIT: |
5822 | case OFPACT_SAMPLE: | |
5823 | case OFPACT_STACK_POP: | |
5824 | case OFPACT_STACK_PUSH: | |
d4abaff5 | 5825 | case OFPACT_DEBUG_RECIRC: |
c2d936a4 BP |
5826 | |
5827 | /* The action set may only include actions and thus | |
5828 | * may not include any instructions */ | |
5829 | case OFPACT_CLEAR_ACTIONS: | |
5830 | case OFPACT_GOTO_TABLE: | |
5831 | case OFPACT_METER: | |
5832 | case OFPACT_WRITE_ACTIONS: | |
5833 | case OFPACT_WRITE_METADATA: | |
5834 | return false; | |
5835 | default: | |
5836 | OVS_NOT_REACHED(); | |
5837 | } | |
f25d0cf3 BP |
5838 | } |
5839 | ||
c2d936a4 | 5840 | /* Append ofpact 'a' onto the tail of 'out' */ |
f25d0cf3 | 5841 | static void |
c2d936a4 | 5842 | ofpact_copy(struct ofpbuf *out, const struct ofpact *a) |
f25d0cf3 | 5843 | { |
c2d936a4 | 5844 | ofpbuf_put(out, a, OFPACT_ALIGN(a->len)); |
f25d0cf3 BP |
5845 | } |
5846 | ||
c2d936a4 BP |
5847 | /* Copies the last ofpact whose type is 'filter' from 'in' to 'out'. */ |
5848 | static bool | |
5849 | ofpacts_copy_last(struct ofpbuf *out, const struct ofpbuf *in, | |
5850 | enum ofpact_type filter) | |
f25d0cf3 | 5851 | { |
c2d936a4 BP |
5852 | const struct ofpact *target; |
5853 | const struct ofpact *a; | |
f25d0cf3 | 5854 | |
c2d936a4 | 5855 | target = NULL; |
6fd6ed71 | 5856 | OFPACT_FOR_EACH (a, in->data, in->size) { |
c2d936a4 BP |
5857 | if (a->type == filter) { |
5858 | target = a; | |
5859 | } | |
5860 | } | |
5861 | if (target) { | |
5862 | ofpact_copy(out, target); | |
f25d0cf3 | 5863 | } |
c2d936a4 | 5864 | return target != NULL; |
f25d0cf3 BP |
5865 | } |
5866 | ||
c2d936a4 BP |
5867 | /* Append all ofpacts, for which 'filter' returns true, from 'in' to 'out'. |
5868 | * The order of appended ofpacts is preserved between 'in' and 'out' */ | |
4cceacb9 | 5869 | static void |
c2d936a4 BP |
5870 | ofpacts_copy_all(struct ofpbuf *out, const struct ofpbuf *in, |
5871 | bool (*filter)(const struct ofpact *)) | |
4cceacb9 | 5872 | { |
c2d936a4 | 5873 | const struct ofpact *a; |
4cceacb9 | 5874 | |
6fd6ed71 | 5875 | OFPACT_FOR_EACH (a, in->data, in->size) { |
c2d936a4 BP |
5876 | if (filter(a)) { |
5877 | ofpact_copy(out, a); | |
5878 | } | |
5879 | } | |
4cceacb9 JS |
5880 | } |
5881 | ||
c2d936a4 BP |
5882 | /* Reads 'action_set', which contains ofpacts accumulated by |
5883 | * OFPACT_WRITE_ACTIONS instructions, and writes equivalent actions to be | |
5884 | * executed directly into 'action_list'. (These names correspond to the | |
5885 | * "Action Set" and "Action List" terms used in OpenFlow 1.1+.) | |
5886 | * | |
5887 | * In general this involves appending the last instance of each action that is | |
e672ff9b | 5888 | * admissible in the action set in the order described in the OpenFlow |
c2d936a4 BP |
5889 | * specification. |
5890 | * | |
5891 | * Exceptions: | |
5892 | * + output action is only appended if no group action was present in 'in'. | |
5893 | * + As a simplification all set actions are copied in the order the are | |
5894 | * provided in 'in' as many set actions applied to a field has the same | |
5895 | * affect as only applying the last action that sets a field and | |
5896 | * duplicates are removed by do_xlate_actions(). | |
5897 | * This has an unwanted side-effect of compsoting multiple | |
5898 | * LOAD_REG actions that touch different regions of the same field. */ | |
5899 | void | |
5900 | ofpacts_execute_action_set(struct ofpbuf *action_list, | |
5901 | const struct ofpbuf *action_set) | |
f25d0cf3 | 5902 | { |
c2d936a4 BP |
5903 | /* The OpenFlow spec "Action Set" section specifies this order. */ |
5904 | ofpacts_copy_last(action_list, action_set, OFPACT_STRIP_VLAN); | |
5905 | ofpacts_copy_last(action_list, action_set, OFPACT_POP_MPLS); | |
5906 | ofpacts_copy_last(action_list, action_set, OFPACT_PUSH_MPLS); | |
5907 | ofpacts_copy_last(action_list, action_set, OFPACT_PUSH_VLAN); | |
5908 | ofpacts_copy_last(action_list, action_set, OFPACT_DEC_TTL); | |
5909 | ofpacts_copy_last(action_list, action_set, OFPACT_DEC_MPLS_TTL); | |
1b0ee636 | 5910 | ofpacts_copy_all(action_list, action_set, ofpact_is_set_or_move_action); |
c2d936a4 | 5911 | ofpacts_copy_last(action_list, action_set, OFPACT_SET_QUEUE); |
f25d0cf3 | 5912 | |
c2d936a4 BP |
5913 | /* If both OFPACT_GROUP and OFPACT_OUTPUT are present, OpenFlow says that |
5914 | * we should execute only OFPACT_GROUP. | |
5915 | * | |
5916 | * If neither OFPACT_GROUP nor OFPACT_OUTPUT is present, then we can drop | |
5917 | * all the actions because there's no point in modifying a packet that will | |
5918 | * not be sent anywhere. */ | |
5919 | if (!ofpacts_copy_last(action_list, action_set, OFPACT_GROUP) && | |
2e34a6a3 SS |
5920 | !ofpacts_copy_last(action_list, action_set, OFPACT_OUTPUT) && |
5921 | !ofpacts_copy_last(action_list, action_set, OFPACT_RESUBMIT)) { | |
c2d936a4 | 5922 | ofpbuf_clear(action_list); |
f25d0cf3 | 5923 | } |
f25d0cf3 BP |
5924 | } |
5925 | ||
f25d0cf3 | 5926 | |
c2d936a4 BP |
5927 | static enum ofperr |
5928 | ofpacts_decode_for_action_set(const struct ofp_action_header *in, | |
5929 | size_t n_in, enum ofp_version version, | |
5930 | struct ofpbuf *out) | |
c2d967a5 | 5931 | { |
c2d936a4 BP |
5932 | enum ofperr error; |
5933 | struct ofpact *a; | |
6fd6ed71 | 5934 | size_t start = out->size; |
c2d967a5 | 5935 | |
c2d936a4 | 5936 | error = ofpacts_decode(in, n_in, version, out); |
c2d967a5 | 5937 | |
c2d936a4 BP |
5938 | if (error) { |
5939 | return error; | |
5940 | } | |
5941 | ||
6fd6ed71 | 5942 | OFPACT_FOR_EACH (a, ofpact_end(out->data, start), out->size - start) { |
c2d936a4 BP |
5943 | if (!ofpact_is_allowed_in_actions_set(a)) { |
5944 | VLOG_WARN_RL(&rl, "disallowed action in action set"); | |
5945 | return OFPERR_OFPBAC_BAD_TYPE; | |
c2d967a5 MM |
5946 | } |
5947 | } | |
c2d936a4 BP |
5948 | |
5949 | return 0; | |
c2d967a5 | 5950 | } |
c2d936a4 BP |
5951 | \f |
5952 | /* OpenFlow 1.1 instructions. */ | |
c2d967a5 | 5953 | |
c2d936a4 BP |
5954 | struct instruction_type_info { |
5955 | enum ovs_instruction_type type; | |
5956 | const char *name; | |
5957 | }; | |
5958 | ||
5959 | static const struct instruction_type_info inst_info[] = { | |
5960 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) {OVSINST_##ENUM, NAME}, | |
5961 | OVS_INSTRUCTIONS | |
5962 | #undef DEFINE_INST | |
5963 | }; | |
5964 | ||
5965 | const char * | |
5966 | ovs_instruction_name_from_type(enum ovs_instruction_type type) | |
f25d0cf3 | 5967 | { |
c2d936a4 | 5968 | return inst_info[type].name; |
f25d0cf3 BP |
5969 | } |
5970 | ||
c2d936a4 BP |
5971 | int |
5972 | ovs_instruction_type_from_name(const char *name) | |
29089a54 | 5973 | { |
c2d936a4 BP |
5974 | const struct instruction_type_info *p; |
5975 | for (p = inst_info; p < &inst_info[ARRAY_SIZE(inst_info)]; p++) { | |
5976 | if (!strcasecmp(name, p->name)) { | |
5977 | return p->type; | |
5978 | } | |
5979 | } | |
5980 | return -1; | |
29089a54 RL |
5981 | } |
5982 | ||
c2d936a4 BP |
5983 | enum ovs_instruction_type |
5984 | ovs_instruction_type_from_ofpact_type(enum ofpact_type type) | |
f25d0cf3 | 5985 | { |
c2d936a4 BP |
5986 | switch (type) { |
5987 | case OFPACT_METER: | |
5988 | return OVSINST_OFPIT13_METER; | |
5989 | case OFPACT_CLEAR_ACTIONS: | |
5990 | return OVSINST_OFPIT11_CLEAR_ACTIONS; | |
5991 | case OFPACT_WRITE_ACTIONS: | |
5992 | return OVSINST_OFPIT11_WRITE_ACTIONS; | |
5993 | case OFPACT_WRITE_METADATA: | |
5994 | return OVSINST_OFPIT11_WRITE_METADATA; | |
5995 | case OFPACT_GOTO_TABLE: | |
5996 | return OVSINST_OFPIT11_GOTO_TABLE; | |
5997 | case OFPACT_OUTPUT: | |
5998 | case OFPACT_GROUP: | |
f25d0cf3 | 5999 | case OFPACT_CONTROLLER: |
c2d936a4 | 6000 | case OFPACT_ENQUEUE: |
f25d0cf3 | 6001 | case OFPACT_OUTPUT_REG: |
f25d0cf3 | 6002 | case OFPACT_BUNDLE: |
c2d936a4 BP |
6003 | case OFPACT_SET_VLAN_VID: |
6004 | case OFPACT_SET_VLAN_PCP: | |
6005 | case OFPACT_STRIP_VLAN: | |
6006 | case OFPACT_PUSH_VLAN: | |
6007 | case OFPACT_SET_ETH_SRC: | |
6008 | case OFPACT_SET_ETH_DST: | |
6009 | case OFPACT_SET_IPV4_SRC: | |
6010 | case OFPACT_SET_IPV4_DST: | |
6011 | case OFPACT_SET_IP_DSCP: | |
6012 | case OFPACT_SET_IP_ECN: | |
6013 | case OFPACT_SET_IP_TTL: | |
6014 | case OFPACT_SET_L4_SRC_PORT: | |
6015 | case OFPACT_SET_L4_DST_PORT: | |
f25d0cf3 | 6016 | case OFPACT_REG_MOVE: |
c2d936a4 | 6017 | case OFPACT_SET_FIELD: |
bd85dac1 | 6018 | case OFPACT_STACK_PUSH: |
bd85dac1 | 6019 | case OFPACT_STACK_POP: |
f25d0cf3 | 6020 | case OFPACT_DEC_TTL: |
097d4939 | 6021 | case OFPACT_SET_MPLS_LABEL: |
097d4939 | 6022 | case OFPACT_SET_MPLS_TC: |
0f3f3c3d | 6023 | case OFPACT_SET_MPLS_TTL: |
b676167a | 6024 | case OFPACT_DEC_MPLS_TTL: |
c2d936a4 BP |
6025 | case OFPACT_PUSH_MPLS: |
6026 | case OFPACT_POP_MPLS: | |
f25d0cf3 | 6027 | case OFPACT_SET_TUNNEL: |
c2d936a4 BP |
6028 | case OFPACT_SET_QUEUE: |
6029 | case OFPACT_POP_QUEUE: | |
6030 | case OFPACT_FIN_TIMEOUT: | |
6031 | case OFPACT_RESUBMIT: | |
6032 | case OFPACT_LEARN: | |
18080541 | 6033 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
6034 | case OFPACT_MULTIPATH: |
6035 | case OFPACT_NOTE: | |
6036 | case OFPACT_EXIT: | |
e672ff9b | 6037 | case OFPACT_UNROLL_XLATE: |
c2d936a4 | 6038 | case OFPACT_SAMPLE: |
d4abaff5 | 6039 | case OFPACT_DEBUG_RECIRC: |
07659514 | 6040 | case OFPACT_CT: |
9ac0aada | 6041 | case OFPACT_NAT: |
c2d936a4 BP |
6042 | default: |
6043 | return OVSINST_OFPIT11_APPLY_ACTIONS; | |
6044 | } | |
6045 | } | |
6046 | ||
6047 | enum ofperr | |
6048 | ovs_instruction_type_from_inst_type(enum ovs_instruction_type *instruction_type, | |
6049 | const uint16_t inst_type) | |
6050 | { | |
6051 | switch (inst_type) { | |
6052 | ||
6053 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
6054 | case ENUM: \ | |
6055 | *instruction_type = OVSINST_##ENUM; \ | |
6056 | return 0; | |
6057 | OVS_INSTRUCTIONS | |
6058 | #undef DEFINE_INST | |
6059 | ||
6060 | default: | |
6061 | return OFPERR_OFPBIC_UNKNOWN_INST; | |
6062 | } | |
6063 | } | |
6064 | ||
6065 | /* Two-way translation between OVS's internal "OVSINST_*" representation of | |
6066 | * instructions and the "OFPIT_*" representation used in OpenFlow. */ | |
6067 | struct ovsinst_map { | |
6068 | enum ovs_instruction_type ovsinst; /* Internal name for instruction. */ | |
6069 | int ofpit; /* OFPIT_* number from OpenFlow spec. */ | |
6070 | }; | |
6071 | ||
6072 | static const struct ovsinst_map * | |
6073 | get_ovsinst_map(enum ofp_version version) | |
6074 | { | |
6075 | /* OpenFlow 1.1 and 1.2 instructions. */ | |
6076 | static const struct ovsinst_map of11[] = { | |
6077 | { OVSINST_OFPIT11_GOTO_TABLE, 1 }, | |
6078 | { OVSINST_OFPIT11_WRITE_METADATA, 2 }, | |
6079 | { OVSINST_OFPIT11_WRITE_ACTIONS, 3 }, | |
6080 | { OVSINST_OFPIT11_APPLY_ACTIONS, 4 }, | |
6081 | { OVSINST_OFPIT11_CLEAR_ACTIONS, 5 }, | |
6082 | { 0, -1 }, | |
6083 | }; | |
f25d0cf3 | 6084 | |
c2d936a4 BP |
6085 | /* OpenFlow 1.3+ instructions. */ |
6086 | static const struct ovsinst_map of13[] = { | |
6087 | { OVSINST_OFPIT11_GOTO_TABLE, 1 }, | |
6088 | { OVSINST_OFPIT11_WRITE_METADATA, 2 }, | |
6089 | { OVSINST_OFPIT11_WRITE_ACTIONS, 3 }, | |
6090 | { OVSINST_OFPIT11_APPLY_ACTIONS, 4 }, | |
6091 | { OVSINST_OFPIT11_CLEAR_ACTIONS, 5 }, | |
6092 | { OVSINST_OFPIT13_METER, 6 }, | |
6093 | { 0, -1 }, | |
6094 | }; | |
4cceacb9 | 6095 | |
c2d936a4 BP |
6096 | return version < OFP13_VERSION ? of11 : of13; |
6097 | } | |
f25d0cf3 | 6098 | |
c2d936a4 BP |
6099 | /* Converts 'ovsinst_bitmap', a bitmap whose bits correspond to OVSINST_* |
6100 | * values, into a bitmap of instructions suitable for OpenFlow 'version' | |
6101 | * (OFP11_VERSION or later), and returns the result. */ | |
6102 | ovs_be32 | |
6103 | ovsinst_bitmap_to_openflow(uint32_t ovsinst_bitmap, enum ofp_version version) | |
6104 | { | |
6105 | uint32_t ofpit_bitmap = 0; | |
6106 | const struct ovsinst_map *x; | |
f25d0cf3 | 6107 | |
c2d936a4 BP |
6108 | for (x = get_ovsinst_map(version); x->ofpit >= 0; x++) { |
6109 | if (ovsinst_bitmap & (1u << x->ovsinst)) { | |
6110 | ofpit_bitmap |= 1u << x->ofpit; | |
6111 | } | |
6112 | } | |
6113 | return htonl(ofpit_bitmap); | |
6114 | } | |
f25d0cf3 | 6115 | |
c2d936a4 BP |
6116 | /* Converts 'ofpit_bitmap', a bitmap of instructions from an OpenFlow message |
6117 | * with the given 'version' (OFP11_VERSION or later) into a bitmap whose bits | |
6118 | * correspond to OVSINST_* values, and returns the result. */ | |
6119 | uint32_t | |
6120 | ovsinst_bitmap_from_openflow(ovs_be32 ofpit_bitmap, enum ofp_version version) | |
6121 | { | |
6122 | uint32_t ovsinst_bitmap = 0; | |
6123 | const struct ovsinst_map *x; | |
f25d0cf3 | 6124 | |
c2d936a4 BP |
6125 | for (x = get_ovsinst_map(version); x->ofpit >= 0; x++) { |
6126 | if (ofpit_bitmap & htonl(1u << x->ofpit)) { | |
6127 | ovsinst_bitmap |= 1u << x->ovsinst; | |
6128 | } | |
6129 | } | |
6130 | return ovsinst_bitmap; | |
6131 | } | |
f25d0cf3 | 6132 | |
c2d936a4 BP |
6133 | static inline struct ofp11_instruction * |
6134 | instruction_next(const struct ofp11_instruction *inst) | |
6135 | { | |
6136 | return ((struct ofp11_instruction *) (void *) | |
6137 | ((uint8_t *) inst + ntohs(inst->len))); | |
6138 | } | |
f25d0cf3 | 6139 | |
c2d936a4 BP |
6140 | static inline bool |
6141 | instruction_is_valid(const struct ofp11_instruction *inst, | |
6142 | size_t n_instructions) | |
6143 | { | |
6144 | uint16_t len = ntohs(inst->len); | |
6145 | return (!(len % OFP11_INSTRUCTION_ALIGN) | |
6146 | && len >= sizeof *inst | |
6147 | && len / sizeof *inst <= n_instructions); | |
6148 | } | |
f25d0cf3 | 6149 | |
c2d936a4 BP |
6150 | /* This macro is careful to check for instructions with bad lengths. */ |
6151 | #define INSTRUCTION_FOR_EACH(ITER, LEFT, INSTRUCTIONS, N_INSTRUCTIONS) \ | |
6152 | for ((ITER) = (INSTRUCTIONS), (LEFT) = (N_INSTRUCTIONS); \ | |
6153 | (LEFT) > 0 && instruction_is_valid(ITER, LEFT); \ | |
6154 | ((LEFT) -= (ntohs((ITER)->len) \ | |
6155 | / sizeof(struct ofp11_instruction)), \ | |
6156 | (ITER) = instruction_next(ITER))) | |
f25d0cf3 | 6157 | |
c2d936a4 BP |
6158 | static enum ofperr |
6159 | decode_openflow11_instruction(const struct ofp11_instruction *inst, | |
6160 | enum ovs_instruction_type *type) | |
6161 | { | |
6162 | uint16_t len = ntohs(inst->len); | |
b02475c5 | 6163 | |
c2d936a4 BP |
6164 | switch (inst->type) { |
6165 | case CONSTANT_HTONS(OFPIT11_EXPERIMENTER): | |
6166 | return OFPERR_OFPBIC_BAD_EXPERIMENTER; | |
b02475c5 | 6167 | |
c2d936a4 BP |
6168 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \ |
6169 | case CONSTANT_HTONS(ENUM): \ | |
6170 | if (EXTENSIBLE \ | |
6171 | ? len >= sizeof(struct STRUCT) \ | |
6172 | : len == sizeof(struct STRUCT)) { \ | |
6173 | *type = OVSINST_##ENUM; \ | |
6174 | return 0; \ | |
6175 | } else { \ | |
6176 | return OFPERR_OFPBIC_BAD_LEN; \ | |
6177 | } | |
6178 | OVS_INSTRUCTIONS | |
6179 | #undef DEFINE_INST | |
29089a54 | 6180 | |
c2d936a4 BP |
6181 | default: |
6182 | return OFPERR_OFPBIC_UNKNOWN_INST; | |
f25d0cf3 BP |
6183 | } |
6184 | } | |
f25d0cf3 | 6185 | |
c2d936a4 BP |
6186 | static enum ofperr |
6187 | decode_openflow11_instructions(const struct ofp11_instruction insts[], | |
6188 | size_t n_insts, | |
6189 | const struct ofp11_instruction *out[]) | |
f25d0cf3 | 6190 | { |
c2d936a4 BP |
6191 | const struct ofp11_instruction *inst; |
6192 | size_t left; | |
f25d0cf3 | 6193 | |
c2d936a4 BP |
6194 | memset(out, 0, N_OVS_INSTRUCTIONS * sizeof *out); |
6195 | INSTRUCTION_FOR_EACH (inst, left, insts, n_insts) { | |
6196 | enum ovs_instruction_type type; | |
6197 | enum ofperr error; | |
f25d0cf3 | 6198 | |
c2d936a4 BP |
6199 | error = decode_openflow11_instruction(inst, &type); |
6200 | if (error) { | |
6201 | return error; | |
6202 | } | |
f25d0cf3 | 6203 | |
c2d936a4 BP |
6204 | if (out[type]) { |
6205 | return OFPERR_OFPBIC_DUP_INST; | |
6206 | } | |
6207 | out[type] = inst; | |
6208 | } | |
6209 | ||
6210 | if (left) { | |
6211 | VLOG_WARN_RL(&rl, "bad instruction format at offset %"PRIuSIZE, | |
6212 | (n_insts - left) * sizeof *inst); | |
6213 | return OFPERR_OFPBIC_BAD_LEN; | |
6214 | } | |
6215 | return 0; | |
f25d0cf3 BP |
6216 | } |
6217 | ||
6218 | static void | |
c2d936a4 BP |
6219 | get_actions_from_instruction(const struct ofp11_instruction *inst, |
6220 | const struct ofp_action_header **actions, | |
6221 | size_t *actions_len) | |
f25d0cf3 | 6222 | { |
c2d936a4 BP |
6223 | *actions = ALIGNED_CAST(const struct ofp_action_header *, inst + 1); |
6224 | *actions_len = ntohs(inst->len) - sizeof *inst; | |
6225 | } | |
f25d0cf3 | 6226 | |
c2d936a4 BP |
6227 | enum ofperr |
6228 | ofpacts_pull_openflow_instructions(struct ofpbuf *openflow, | |
6229 | unsigned int instructions_len, | |
6230 | enum ofp_version version, | |
6231 | struct ofpbuf *ofpacts) | |
6232 | { | |
6233 | const struct ofp11_instruction *instructions; | |
6234 | const struct ofp11_instruction *insts[N_OVS_INSTRUCTIONS]; | |
6235 | enum ofperr error; | |
f25d0cf3 | 6236 | |
c2d936a4 BP |
6237 | if (version == OFP10_VERSION) { |
6238 | return ofpacts_pull_openflow_actions__(openflow, instructions_len, | |
6239 | version, | |
6240 | (1u << N_OVS_INSTRUCTIONS) - 1, | |
d824b5b7 | 6241 | ofpacts, 0); |
c2d936a4 | 6242 | } |
f25d0cf3 | 6243 | |
c2d936a4 | 6244 | ofpbuf_clear(ofpacts); |
f25d0cf3 | 6245 | |
c2d936a4 BP |
6246 | if (instructions_len % OFP11_INSTRUCTION_ALIGN != 0) { |
6247 | VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u is not a " | |
6248 | "multiple of %d", | |
6249 | instructions_len, OFP11_INSTRUCTION_ALIGN); | |
6250 | error = OFPERR_OFPBIC_BAD_LEN; | |
6251 | goto exit; | |
6252 | } | |
f25d0cf3 | 6253 | |
c2d936a4 BP |
6254 | instructions = ofpbuf_try_pull(openflow, instructions_len); |
6255 | if (instructions == NULL) { | |
6256 | VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u exceeds " | |
6257 | "remaining message length (%"PRIu32")", | |
6fd6ed71 | 6258 | instructions_len, openflow->size); |
c2d936a4 BP |
6259 | error = OFPERR_OFPBIC_BAD_LEN; |
6260 | goto exit; | |
6261 | } | |
f25d0cf3 | 6262 | |
c2d936a4 BP |
6263 | error = decode_openflow11_instructions( |
6264 | instructions, instructions_len / OFP11_INSTRUCTION_ALIGN, | |
6265 | insts); | |
6266 | if (error) { | |
6267 | goto exit; | |
6268 | } | |
f25d0cf3 | 6269 | |
c2d936a4 BP |
6270 | if (insts[OVSINST_OFPIT13_METER]) { |
6271 | const struct ofp13_instruction_meter *oim; | |
6272 | struct ofpact_meter *om; | |
f25d0cf3 | 6273 | |
c2d936a4 BP |
6274 | oim = ALIGNED_CAST(const struct ofp13_instruction_meter *, |
6275 | insts[OVSINST_OFPIT13_METER]); | |
f25d0cf3 | 6276 | |
c2d936a4 BP |
6277 | om = ofpact_put_METER(ofpacts); |
6278 | om->meter_id = ntohl(oim->meter_id); | |
6279 | } | |
6280 | if (insts[OVSINST_OFPIT11_APPLY_ACTIONS]) { | |
6281 | const struct ofp_action_header *actions; | |
6282 | size_t actions_len; | |
f25d0cf3 | 6283 | |
c2d936a4 BP |
6284 | get_actions_from_instruction(insts[OVSINST_OFPIT11_APPLY_ACTIONS], |
6285 | &actions, &actions_len); | |
6286 | error = ofpacts_decode(actions, actions_len, version, ofpacts); | |
6287 | if (error) { | |
6288 | goto exit; | |
6289 | } | |
6290 | } | |
6291 | if (insts[OVSINST_OFPIT11_CLEAR_ACTIONS]) { | |
6292 | instruction_get_OFPIT11_CLEAR_ACTIONS( | |
6293 | insts[OVSINST_OFPIT11_CLEAR_ACTIONS]); | |
6294 | ofpact_put_CLEAR_ACTIONS(ofpacts); | |
6295 | } | |
6296 | if (insts[OVSINST_OFPIT11_WRITE_ACTIONS]) { | |
6297 | struct ofpact_nest *on; | |
6298 | const struct ofp_action_header *actions; | |
6299 | size_t actions_len; | |
6300 | size_t start; | |
f25d0cf3 | 6301 | |
c2d936a4 | 6302 | ofpact_pad(ofpacts); |
6fd6ed71 | 6303 | start = ofpacts->size; |
255a54ea BP |
6304 | ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS, |
6305 | offsetof(struct ofpact_nest, actions)); | |
c2d936a4 BP |
6306 | get_actions_from_instruction(insts[OVSINST_OFPIT11_WRITE_ACTIONS], |
6307 | &actions, &actions_len); | |
6308 | error = ofpacts_decode_for_action_set(actions, actions_len, | |
6309 | version, ofpacts); | |
6310 | if (error) { | |
6311 | goto exit; | |
6312 | } | |
6313 | on = ofpbuf_at_assert(ofpacts, start, sizeof *on); | |
6fd6ed71 | 6314 | on->ofpact.len = ofpacts->size - start; |
c2d936a4 BP |
6315 | } |
6316 | if (insts[OVSINST_OFPIT11_WRITE_METADATA]) { | |
6317 | const struct ofp11_instruction_write_metadata *oiwm; | |
6318 | struct ofpact_metadata *om; | |
ca287d20 | 6319 | |
c2d936a4 BP |
6320 | oiwm = ALIGNED_CAST(const struct ofp11_instruction_write_metadata *, |
6321 | insts[OVSINST_OFPIT11_WRITE_METADATA]); | |
8dd54666 | 6322 | |
c2d936a4 BP |
6323 | om = ofpact_put_WRITE_METADATA(ofpacts); |
6324 | om->metadata = oiwm->metadata; | |
6325 | om->mask = oiwm->metadata_mask; | |
6326 | } | |
6327 | if (insts[OVSINST_OFPIT11_GOTO_TABLE]) { | |
6328 | const struct ofp11_instruction_goto_table *oigt; | |
6329 | struct ofpact_goto_table *ogt; | |
7395c052 | 6330 | |
c2d936a4 BP |
6331 | oigt = instruction_get_OFPIT11_GOTO_TABLE( |
6332 | insts[OVSINST_OFPIT11_GOTO_TABLE]); | |
6333 | ogt = ofpact_put_GOTO_TABLE(ofpacts); | |
6334 | ogt->table_id = oigt->table_id; | |
6335 | } | |
e3f8f887 | 6336 | |
6fd6ed71 | 6337 | error = ofpacts_verify(ofpacts->data, ofpacts->size, |
d824b5b7 | 6338 | (1u << N_OVS_INSTRUCTIONS) - 1, 0); |
c2d936a4 BP |
6339 | exit: |
6340 | if (error) { | |
6341 | ofpbuf_clear(ofpacts); | |
f25d0cf3 | 6342 | } |
c2d936a4 | 6343 | return error; |
f25d0cf3 | 6344 | } |
d01c980f | 6345 | |
c2d936a4 BP |
6346 | /* Update the length of the instruction that begins at offset 'ofs' within |
6347 | * 'openflow' and contains nested actions that extend to the end of 'openflow'. | |
6348 | * If the instruction contains no nested actions, deletes it entirely. */ | |
d01c980f | 6349 | static void |
c2d936a4 | 6350 | ofpacts_update_instruction_actions(struct ofpbuf *openflow, size_t ofs) |
d01c980f | 6351 | { |
c2d936a4 | 6352 | struct ofp11_instruction_actions *oia; |
d01c980f | 6353 | |
c2d936a4 | 6354 | oia = ofpbuf_at_assert(openflow, ofs, sizeof *oia); |
6fd6ed71 PS |
6355 | if (openflow->size > ofs + sizeof *oia) { |
6356 | oia->len = htons(openflow->size - ofs); | |
c2d936a4 | 6357 | } else { |
6fd6ed71 | 6358 | openflow->size = ofs; |
c2d936a4 | 6359 | } |
d01c980f | 6360 | } |
c2d936a4 BP |
6361 | \f |
6362 | /* Checks that 'port' is a valid output port for OFPACT_OUTPUT, given that the | |
6363 | * switch will never have more than 'max_ports' ports. Returns 0 if 'port' is | |
6364 | * valid, otherwise an OpenFlow error code. */ | |
6365 | enum ofperr | |
6366 | ofpact_check_output_port(ofp_port_t port, ofp_port_t max_ports) | |
99086062 | 6367 | { |
c2d936a4 BP |
6368 | switch (port) { |
6369 | case OFPP_IN_PORT: | |
6370 | case OFPP_TABLE: | |
6371 | case OFPP_NORMAL: | |
6372 | case OFPP_FLOOD: | |
6373 | case OFPP_ALL: | |
6374 | case OFPP_CONTROLLER: | |
c2d936a4 BP |
6375 | case OFPP_LOCAL: |
6376 | return 0; | |
6377 | ||
13d2c689 BP |
6378 | case OFPP_NONE: |
6379 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
6380 | ||
c2d936a4 BP |
6381 | default: |
6382 | if (ofp_to_u16(port) < ofp_to_u16(max_ports)) { | |
6383 | return 0; | |
6384 | } | |
6385 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
99086062 BP |
6386 | } |
6387 | } | |
6388 | ||
c2d936a4 BP |
6389 | /* Removes the protocols that require consistency between match and actions |
6390 | * (that's everything but OpenFlow 1.0) from '*usable_protocols'. | |
6391 | * | |
6392 | * (An example of an inconsistency between match and actions is a flow that | |
6393 | * does not match on an MPLS Ethertype but has an action that pops an MPLS | |
6394 | * label.) */ | |
d01c980f | 6395 | static void |
c2d936a4 BP |
6396 | inconsistent_match(enum ofputil_protocol *usable_protocols) |
6397 | { | |
6398 | *usable_protocols &= OFPUTIL_P_OF10_ANY; | |
6399 | } | |
6400 | ||
6401 | /* May modify flow->dl_type, flow->nw_proto and flow->vlan_tci, | |
6402 | * caller must restore them. | |
6403 | * | |
6404 | * Modifies some actions, filling in fields that could not be properly set | |
6405 | * without context. */ | |
6406 | static enum ofperr | |
6407 | ofpact_check__(enum ofputil_protocol *usable_protocols, struct ofpact *a, | |
6408 | struct flow *flow, ofp_port_t max_ports, | |
6409 | uint8_t table_id, uint8_t n_tables) | |
d01c980f | 6410 | { |
c2d936a4 BP |
6411 | const struct ofpact_enqueue *enqueue; |
6412 | const struct mf_field *mf; | |
6413 | ||
d01c980f BP |
6414 | switch (a->type) { |
6415 | case OFPACT_OUTPUT: | |
c2d936a4 BP |
6416 | return ofpact_check_output_port(ofpact_get_OUTPUT(a)->port, |
6417 | max_ports); | |
6418 | ||
6419 | case OFPACT_CONTROLLER: | |
6420 | return 0; | |
d01c980f BP |
6421 | |
6422 | case OFPACT_ENQUEUE: | |
c2d936a4 BP |
6423 | enqueue = ofpact_get_ENQUEUE(a); |
6424 | if (ofp_to_u16(enqueue->port) >= ofp_to_u16(max_ports) | |
6425 | && enqueue->port != OFPP_IN_PORT | |
6426 | && enqueue->port != OFPP_LOCAL) { | |
6427 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
6428 | } | |
6429 | return 0; | |
6430 | ||
6431 | case OFPACT_OUTPUT_REG: | |
6432 | return mf_check_src(&ofpact_get_OUTPUT_REG(a)->src, flow); | |
6433 | ||
6434 | case OFPACT_BUNDLE: | |
6435 | return bundle_check(ofpact_get_BUNDLE(a), max_ports, flow); | |
d01c980f BP |
6436 | |
6437 | case OFPACT_SET_VLAN_VID: | |
c2d936a4 BP |
6438 | /* Remember if we saw a vlan tag in the flow to aid translating to |
6439 | * OpenFlow 1.1+ if need be. */ | |
6440 | ofpact_get_SET_VLAN_VID(a)->flow_has_vlan = | |
6441 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
6442 | if (!(flow->vlan_tci & htons(VLAN_CFI)) && | |
6443 | !ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) { | |
6444 | inconsistent_match(usable_protocols); | |
6445 | } | |
6446 | /* Temporary mark that we have a vlan tag. */ | |
6447 | flow->vlan_tci |= htons(VLAN_CFI); | |
6448 | return 0; | |
d01c980f BP |
6449 | |
6450 | case OFPACT_SET_VLAN_PCP: | |
c2d936a4 BP |
6451 | /* Remember if we saw a vlan tag in the flow to aid translating to |
6452 | * OpenFlow 1.1+ if need be. */ | |
6453 | ofpact_get_SET_VLAN_PCP(a)->flow_has_vlan = | |
6454 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
6455 | if (!(flow->vlan_tci & htons(VLAN_CFI)) && | |
6456 | !ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) { | |
6457 | inconsistent_match(usable_protocols); | |
6458 | } | |
6459 | /* Temporary mark that we have a vlan tag. */ | |
6460 | flow->vlan_tci |= htons(VLAN_CFI); | |
6461 | return 0; | |
d01c980f BP |
6462 | |
6463 | case OFPACT_STRIP_VLAN: | |
c2d936a4 BP |
6464 | if (!(flow->vlan_tci & htons(VLAN_CFI))) { |
6465 | inconsistent_match(usable_protocols); | |
6466 | } | |
6467 | /* Temporary mark that we have no vlan tag. */ | |
6468 | flow->vlan_tci = htons(0); | |
6469 | return 0; | |
d01c980f | 6470 | |
3e34fbdd | 6471 | case OFPACT_PUSH_VLAN: |
c2d936a4 BP |
6472 | if (flow->vlan_tci & htons(VLAN_CFI)) { |
6473 | /* Multiple VLAN headers not supported. */ | |
6474 | return OFPERR_OFPBAC_BAD_TAG; | |
6475 | } | |
6476 | /* Temporary mark that we have a vlan tag. */ | |
6477 | flow->vlan_tci |= htons(VLAN_CFI); | |
6478 | return 0; | |
276c4e7a | 6479 | |
d01c980f | 6480 | case OFPACT_SET_ETH_SRC: |
d01c980f | 6481 | case OFPACT_SET_ETH_DST: |
c2d936a4 | 6482 | return 0; |
d01c980f BP |
6483 | |
6484 | case OFPACT_SET_IPV4_SRC: | |
d01c980f | 6485 | case OFPACT_SET_IPV4_DST: |
c2d936a4 BP |
6486 | if (flow->dl_type != htons(ETH_TYPE_IP)) { |
6487 | inconsistent_match(usable_protocols); | |
6488 | } | |
6489 | return 0; | |
d01c980f | 6490 | |
04f01c24 | 6491 | case OFPACT_SET_IP_DSCP: |
ff14eb7a | 6492 | case OFPACT_SET_IP_ECN: |
0c20dbe4 | 6493 | case OFPACT_SET_IP_TTL: |
7bcb1506 | 6494 | case OFPACT_DEC_TTL: |
c2d936a4 BP |
6495 | if (!is_ip_any(flow)) { |
6496 | inconsistent_match(usable_protocols); | |
6497 | } | |
6498 | return 0; | |
b02475c5 | 6499 | |
c2d936a4 | 6500 | case OFPACT_SET_L4_SRC_PORT: |
c2d936a4 | 6501 | case OFPACT_SET_L4_DST_PORT: |
b8778a0d | 6502 | if (!is_ip_any(flow) || (flow->nw_frag & FLOW_NW_FRAG_LATER) || |
c2d936a4 BP |
6503 | (flow->nw_proto != IPPROTO_TCP && flow->nw_proto != IPPROTO_UDP |
6504 | && flow->nw_proto != IPPROTO_SCTP)) { | |
6505 | inconsistent_match(usable_protocols); | |
6506 | } | |
6507 | /* Note on which transport protocol the port numbers are set. | |
6508 | * This allows this set action to be converted to an OF1.2 set field | |
6509 | * action. */ | |
b8778a0d JR |
6510 | if (a->type == OFPACT_SET_L4_SRC_PORT) { |
6511 | ofpact_get_SET_L4_SRC_PORT(a)->flow_ip_proto = flow->nw_proto; | |
6512 | } else { | |
6513 | ofpact_get_SET_L4_DST_PORT(a)->flow_ip_proto = flow->nw_proto; | |
6514 | } | |
c2d936a4 | 6515 | return 0; |
b02475c5 | 6516 | |
c2d936a4 BP |
6517 | case OFPACT_REG_MOVE: |
6518 | return nxm_reg_move_check(ofpact_get_REG_MOVE(a), flow); | |
8dd54666 | 6519 | |
e3f8f887 | 6520 | case OFPACT_SET_FIELD: |
c2d936a4 BP |
6521 | mf = ofpact_get_SET_FIELD(a)->field; |
6522 | /* Require OXM_OF_VLAN_VID to have an existing VLAN header. */ | |
6523 | if (!mf_are_prereqs_ok(mf, flow) || | |
6524 | (mf->id == MFF_VLAN_VID && !(flow->vlan_tci & htons(VLAN_CFI)))) { | |
6525 | VLOG_WARN_RL(&rl, "set_field %s lacks correct prerequisities", | |
6526 | mf->name); | |
6527 | return OFPERR_OFPBAC_MATCH_INCONSISTENT; | |
6528 | } | |
6529 | /* Remember if we saw a vlan tag in the flow to aid translating to | |
6530 | * OpenFlow 1.1 if need be. */ | |
6531 | ofpact_get_SET_FIELD(a)->flow_has_vlan = | |
6532 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
6533 | if (mf->id == MFF_VLAN_TCI) { | |
6534 | /* The set field may add or remove the vlan tag, | |
6535 | * Mark the status temporarily. */ | |
6536 | flow->vlan_tci = ofpact_get_SET_FIELD(a)->value.be16; | |
6537 | } | |
6538 | return 0; | |
e3f8f887 | 6539 | |
bd85dac1 | 6540 | case OFPACT_STACK_PUSH: |
c2d936a4 BP |
6541 | return nxm_stack_push_check(ofpact_get_STACK_PUSH(a), flow); |
6542 | ||
bd85dac1 | 6543 | case OFPACT_STACK_POP: |
c2d936a4 BP |
6544 | return nxm_stack_pop_check(ofpact_get_STACK_POP(a), flow); |
6545 | ||
6546 | case OFPACT_SET_MPLS_LABEL: | |
6547 | case OFPACT_SET_MPLS_TC: | |
6548 | case OFPACT_SET_MPLS_TTL: | |
6549 | case OFPACT_DEC_MPLS_TTL: | |
6550 | if (!eth_type_mpls(flow->dl_type)) { | |
6551 | inconsistent_match(usable_protocols); | |
6552 | } | |
6553 | return 0; | |
6554 | ||
d01c980f | 6555 | case OFPACT_SET_TUNNEL: |
c2d936a4 | 6556 | case OFPACT_SET_QUEUE: |
d01c980f | 6557 | case OFPACT_POP_QUEUE: |
d01c980f | 6558 | case OFPACT_RESUBMIT: |
c2d936a4 BP |
6559 | return 0; |
6560 | ||
6561 | case OFPACT_FIN_TIMEOUT: | |
6562 | if (flow->nw_proto != IPPROTO_TCP) { | |
6563 | inconsistent_match(usable_protocols); | |
6564 | } | |
6565 | return 0; | |
6566 | ||
d01c980f | 6567 | case OFPACT_LEARN: |
c2d936a4 BP |
6568 | return learn_check(ofpact_get_LEARN(a), flow); |
6569 | ||
18080541 BP |
6570 | case OFPACT_CONJUNCTION: |
6571 | return 0; | |
6572 | ||
d01c980f | 6573 | case OFPACT_MULTIPATH: |
c2d936a4 BP |
6574 | return multipath_check(ofpact_get_MULTIPATH(a), flow); |
6575 | ||
d01c980f BP |
6576 | case OFPACT_NOTE: |
6577 | case OFPACT_EXIT: | |
c2d936a4 | 6578 | return 0; |
d01c980f | 6579 | |
c2d936a4 BP |
6580 | case OFPACT_PUSH_MPLS: |
6581 | flow->dl_type = ofpact_get_PUSH_MPLS(a)->ethertype; | |
6582 | /* The packet is now MPLS and the MPLS payload is opaque. | |
6583 | * Thus nothing can be assumed about the network protocol. | |
6584 | * Temporarily mark that we have no nw_proto. */ | |
6585 | flow->nw_proto = 0; | |
6586 | return 0; | |
1e7db674 | 6587 | |
c2d936a4 BP |
6588 | case OFPACT_POP_MPLS: |
6589 | if (!eth_type_mpls(flow->dl_type)) { | |
6590 | inconsistent_match(usable_protocols); | |
6591 | } | |
6592 | flow->dl_type = ofpact_get_POP_MPLS(a)->ethertype; | |
6593 | return 0; | |
1e7db674 | 6594 | |
c2d936a4 BP |
6595 | case OFPACT_SAMPLE: |
6596 | return 0; | |
1e7db674 | 6597 | |
07659514 JS |
6598 | case OFPACT_CT: { |
6599 | struct ofpact_conntrack *oc = ofpact_get_CT(a); | |
76e3e669 | 6600 | enum ofperr err; |
07659514 JS |
6601 | |
6602 | if (!dl_type_is_ip_any(flow->dl_type) | |
6603 | || (flow->ct_state & CS_INVALID && oc->flags & NX_CT_F_COMMIT)) { | |
6604 | inconsistent_match(usable_protocols); | |
6605 | } | |
6606 | ||
6607 | if (oc->zone_src.field) { | |
6608 | return mf_check_src(&oc->zone_src, flow); | |
6609 | } | |
8e53fe8c | 6610 | |
76e3e669 JR |
6611 | err = ofpacts_check(oc->actions, ofpact_ct_get_action_len(oc), |
6612 | flow, max_ports, table_id, n_tables, | |
6613 | usable_protocols); | |
6614 | return err; | |
07659514 JS |
6615 | } |
6616 | ||
9ac0aada JR |
6617 | case OFPACT_NAT: { |
6618 | struct ofpact_nat *on = ofpact_get_NAT(a); | |
6619 | ||
6620 | if (!dl_type_is_ip_any(flow->dl_type) || | |
6621 | (on->range_af == AF_INET && flow->dl_type != htons(ETH_TYPE_IP)) || | |
6622 | (on->range_af == AF_INET6 | |
6623 | && flow->dl_type != htons(ETH_TYPE_IPV6))) { | |
6624 | inconsistent_match(usable_protocols); | |
6625 | } | |
6626 | return 0; | |
6627 | } | |
6628 | ||
c2d936a4 BP |
6629 | case OFPACT_CLEAR_ACTIONS: |
6630 | return 0; | |
1e7db674 | 6631 | |
c2d936a4 BP |
6632 | case OFPACT_WRITE_ACTIONS: { |
6633 | /* Use a temporary copy of 'usable_protocols' because we can't check | |
6634 | * consistency of an action set. */ | |
6635 | struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a); | |
6636 | enum ofputil_protocol p = *usable_protocols; | |
6637 | return ofpacts_check(on->actions, ofpact_nest_get_action_len(on), | |
6638 | flow, max_ports, table_id, n_tables, &p); | |
6639 | } | |
1e7db674 | 6640 | |
c2d936a4 BP |
6641 | case OFPACT_WRITE_METADATA: |
6642 | return 0; | |
1e7db674 | 6643 | |
c2d936a4 BP |
6644 | case OFPACT_METER: { |
6645 | uint32_t mid = ofpact_get_METER(a)->meter_id; | |
6646 | if (mid == 0 || mid > OFPM13_MAX) { | |
6647 | return OFPERR_OFPMMFC_INVALID_METER; | |
6648 | } | |
6649 | return 0; | |
6650 | } | |
1e7db674 | 6651 | |
c2d936a4 BP |
6652 | case OFPACT_GOTO_TABLE: { |
6653 | uint8_t goto_table = ofpact_get_GOTO_TABLE(a)->table_id; | |
6654 | if ((table_id != 255 && goto_table <= table_id) | |
6655 | || (n_tables != 255 && goto_table >= n_tables)) { | |
8c87971e | 6656 | return OFPERR_OFPBIC_BAD_TABLE_ID; |
c2d936a4 BP |
6657 | } |
6658 | return 0; | |
6659 | } | |
1e7db674 | 6660 | |
c2d936a4 BP |
6661 | case OFPACT_GROUP: |
6662 | return 0; | |
1e7db674 | 6663 | |
e672ff9b JR |
6664 | case OFPACT_UNROLL_XLATE: |
6665 | /* UNROLL is an internal action that should never be seen via | |
6666 | * OpenFlow. */ | |
6667 | return OFPERR_OFPBAC_BAD_TYPE; | |
6668 | ||
d4abaff5 BP |
6669 | case OFPACT_DEBUG_RECIRC: |
6670 | return 0; | |
6671 | ||
c2d936a4 BP |
6672 | default: |
6673 | OVS_NOT_REACHED(); | |
6674 | } | |
6675 | } | |
1e7db674 | 6676 | |
c2d936a4 BP |
6677 | /* Checks that the 'ofpacts_len' bytes of actions in 'ofpacts' are |
6678 | * appropriate for a packet with the prerequisites satisfied by 'flow' in a | |
6679 | * switch with no more than 'max_ports' ports. | |
6680 | * | |
6681 | * If 'ofpacts' and 'flow' are inconsistent with one another, un-sets in | |
6682 | * '*usable_protocols' the protocols that forbid the inconsistency. (An | |
6683 | * example of an inconsistency between match and actions is a flow that does | |
6684 | * not match on an MPLS Ethertype but has an action that pops an MPLS label.) | |
6685 | * | |
6686 | * May annotate ofpacts with information gathered from the 'flow'. | |
6687 | * | |
6688 | * May temporarily modify 'flow', but restores the changes before returning. */ | |
6689 | enum ofperr | |
6690 | ofpacts_check(struct ofpact ofpacts[], size_t ofpacts_len, | |
6691 | struct flow *flow, ofp_port_t max_ports, | |
6692 | uint8_t table_id, uint8_t n_tables, | |
6693 | enum ofputil_protocol *usable_protocols) | |
6694 | { | |
6695 | struct ofpact *a; | |
6696 | ovs_be16 dl_type = flow->dl_type; | |
6697 | ovs_be16 vlan_tci = flow->vlan_tci; | |
6698 | uint8_t nw_proto = flow->nw_proto; | |
6699 | enum ofperr error = 0; | |
1e7db674 | 6700 | |
c2d936a4 BP |
6701 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
6702 | error = ofpact_check__(usable_protocols, a, flow, | |
6703 | max_ports, table_id, n_tables); | |
6704 | if (error) { | |
1e7db674 | 6705 | break; |
c2d936a4 BP |
6706 | } |
6707 | } | |
6708 | /* Restore fields that may have been modified. */ | |
6709 | flow->dl_type = dl_type; | |
6710 | flow->vlan_tci = vlan_tci; | |
6711 | flow->nw_proto = nw_proto; | |
6712 | return error; | |
6713 | } | |
1e7db674 | 6714 | |
c2d936a4 BP |
6715 | /* Like ofpacts_check(), but reports inconsistencies as |
6716 | * OFPERR_OFPBAC_MATCH_INCONSISTENT rather than clearing bits. */ | |
6717 | enum ofperr | |
6718 | ofpacts_check_consistency(struct ofpact ofpacts[], size_t ofpacts_len, | |
6719 | struct flow *flow, ofp_port_t max_ports, | |
6720 | uint8_t table_id, uint8_t n_tables, | |
6721 | enum ofputil_protocol usable_protocols) | |
6722 | { | |
6723 | enum ofputil_protocol p = usable_protocols; | |
6724 | enum ofperr error; | |
1e7db674 | 6725 | |
c2d936a4 BP |
6726 | error = ofpacts_check(ofpacts, ofpacts_len, flow, max_ports, |
6727 | table_id, n_tables, &p); | |
6728 | return (error ? error | |
6729 | : p != usable_protocols ? OFPERR_OFPBAC_MATCH_INCONSISTENT | |
6730 | : 0); | |
6731 | } | |
097d4939 | 6732 | |
8e53fe8c JS |
6733 | static const struct mf_field * |
6734 | ofpact_get_mf_field(enum ofpact_type type, const void *ofpact) | |
6735 | { | |
6736 | if (type == OFPACT_SET_FIELD) { | |
6737 | const struct ofpact_set_field *orl = ofpact; | |
6738 | ||
6739 | return orl->field; | |
6740 | } else if (type == OFPACT_REG_MOVE) { | |
6741 | const struct ofpact_reg_move *orm = ofpact; | |
6742 | ||
6743 | return orm->dst.field; | |
6744 | } | |
6745 | ||
6746 | return NULL; | |
6747 | } | |
6748 | ||
6749 | static enum ofperr | |
6750 | unsupported_nesting(enum ofpact_type action, enum ofpact_type outer_action) | |
6751 | { | |
6752 | VLOG_WARN("%s action doesn't support nested action %s", | |
6753 | ofpact_name(outer_action), ofpact_name(action)); | |
6754 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
6755 | } | |
6756 | ||
6757 | static bool | |
6758 | field_requires_ct(enum mf_field_id field) | |
6759 | { | |
9daf2348 | 6760 | return field == MFF_CT_MARK || field == MFF_CT_LABEL; |
8e53fe8c JS |
6761 | } |
6762 | ||
6763 | /* Apply nesting constraints for actions */ | |
d824b5b7 JS |
6764 | static enum ofperr |
6765 | ofpacts_verify_nested(const struct ofpact *a, enum ofpact_type outer_action) | |
6766 | { | |
8e53fe8c JS |
6767 | const struct mf_field *field = ofpact_get_mf_field(a->type, a); |
6768 | ||
6769 | if (field && field_requires_ct(field->id) && outer_action != OFPACT_CT) { | |
6770 | VLOG_WARN("cannot set CT fields outside of ct action"); | |
6771 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
6772 | } | |
9ac0aada JR |
6773 | if (a->type == OFPACT_NAT) { |
6774 | if (outer_action != OFPACT_CT) { | |
6775 | VLOG_WARN("Cannot have NAT action outside of \"ct\" action"); | |
6776 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
6777 | } | |
6778 | return 0; | |
6779 | } | |
8e53fe8c JS |
6780 | |
6781 | if (outer_action) { | |
6782 | ovs_assert(outer_action == OFPACT_WRITE_ACTIONS | |
6783 | || outer_action == OFPACT_CT); | |
6784 | ||
6785 | if (outer_action == OFPACT_CT) { | |
6786 | if (!field) { | |
6787 | return unsupported_nesting(a->type, outer_action); | |
6788 | } else if (!field_requires_ct(field->id)) { | |
6789 | VLOG_WARN("%s action doesn't support nested modification " | |
6790 | "of %s", ofpact_name(outer_action), field->name); | |
6791 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
6792 | } | |
6793 | } | |
d824b5b7 JS |
6794 | } |
6795 | ||
6796 | return 0; | |
6797 | } | |
6798 | ||
18080541 BP |
6799 | /* Verifies that the 'ofpacts_len' bytes of actions in 'ofpacts' are in the |
6800 | * appropriate order as defined by the OpenFlow spec and as required by Open | |
6801 | * vSwitch. | |
6802 | * | |
6803 | * 'allowed_ovsinsts' is a bitmap of OVSINST_* values, in which 1-bits indicate | |
d824b5b7 JS |
6804 | * instructions that are allowed within 'ofpacts[]'. |
6805 | * | |
6806 | * If 'outer_action' is not zero, it specifies that the actions are nested | |
6807 | * within another action of type 'outer_action'. */ | |
c2d936a4 BP |
6808 | static enum ofperr |
6809 | ofpacts_verify(const struct ofpact ofpacts[], size_t ofpacts_len, | |
d824b5b7 | 6810 | uint32_t allowed_ovsinsts, enum ofpact_type outer_action) |
c2d936a4 BP |
6811 | { |
6812 | const struct ofpact *a; | |
6813 | enum ovs_instruction_type inst; | |
097d4939 | 6814 | |
c2d936a4 BP |
6815 | inst = OVSINST_OFPIT13_METER; |
6816 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
6817 | enum ovs_instruction_type next; | |
8e53fe8c | 6818 | enum ofperr error; |
1e7db674 | 6819 | |
18080541 BP |
6820 | if (a->type == OFPACT_CONJUNCTION) { |
6821 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
f08e39dd BP |
6822 | if (a->type != OFPACT_CONJUNCTION && a->type != OFPACT_NOTE) { |
6823 | VLOG_WARN("\"conjunction\" actions may be used along with " | |
6824 | "\"note\" but not any other kind of action " | |
6825 | "(such as the \"%s\" action used here)", | |
96775a1c | 6826 | ofpact_name(a->type)); |
18080541 BP |
6827 | return OFPERR_NXBAC_BAD_CONJUNCTION; |
6828 | } | |
6829 | } | |
6830 | return 0; | |
6831 | } | |
6832 | ||
8e53fe8c JS |
6833 | error = ofpacts_verify_nested(a, outer_action); |
6834 | if (error) { | |
6835 | return error; | |
d824b5b7 JS |
6836 | } |
6837 | ||
c2d936a4 BP |
6838 | next = ovs_instruction_type_from_ofpact_type(a->type); |
6839 | if (a > ofpacts | |
6840 | && (inst == OVSINST_OFPIT11_APPLY_ACTIONS | |
6841 | ? next < inst | |
6842 | : next <= inst)) { | |
6843 | const char *name = ovs_instruction_name_from_type(inst); | |
6844 | const char *next_name = ovs_instruction_name_from_type(next); | |
1e7db674 | 6845 | |
c2d936a4 BP |
6846 | if (next == inst) { |
6847 | VLOG_WARN("duplicate %s instruction not allowed, for OpenFlow " | |
6848 | "1.1+ compatibility", name); | |
6849 | } else { | |
6850 | VLOG_WARN("invalid instruction ordering: %s must appear " | |
6851 | "before %s, for OpenFlow 1.1+ compatibility", | |
6852 | next_name, name); | |
6853 | } | |
6854 | return OFPERR_OFPBAC_UNSUPPORTED_ORDER; | |
6855 | } | |
6856 | if (!((1u << next) & allowed_ovsinsts)) { | |
6857 | const char *name = ovs_instruction_name_from_type(next); | |
1e7db674 | 6858 | |
c2d936a4 BP |
6859 | VLOG_WARN("%s instruction not allowed here", name); |
6860 | return OFPERR_OFPBIC_UNSUP_INST; | |
1e7db674 | 6861 | } |
c2d936a4 BP |
6862 | |
6863 | inst = next; | |
6864 | } | |
6865 | ||
6866 | return 0; | |
6867 | } | |
6868 | \f | |
6869 | /* Converting ofpacts to OpenFlow. */ | |
6870 | ||
6871 | static void | |
6872 | encode_ofpact(const struct ofpact *a, enum ofp_version ofp_version, | |
6873 | struct ofpbuf *out) | |
6874 | { | |
6875 | switch (a->type) { | |
6876 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
6877 | case OFPACT_##ENUM: \ | |
355ead69 GS |
6878 | encode_##ENUM(ofpact_get_##ENUM(a), ofp_version, out); \ |
6879 | return; | |
c2d936a4 BP |
6880 | OFPACTS |
6881 | #undef OFPACT | |
6882 | default: | |
6883 | OVS_NOT_REACHED(); | |
1e7db674 | 6884 | } |
e3f8f887 JR |
6885 | } |
6886 | ||
6887 | /* Converts the 'ofpacts_len' bytes of ofpacts in 'ofpacts' into OpenFlow | |
6888 | * actions in 'openflow', appending the actions to any existing data in | |
d01c980f | 6889 | * 'openflow'. */ |
a07c15bc | 6890 | size_t |
e3f8f887 JR |
6891 | ofpacts_put_openflow_actions(const struct ofpact ofpacts[], size_t ofpacts_len, |
6892 | struct ofpbuf *openflow, | |
6893 | enum ofp_version ofp_version) | |
d01c980f BP |
6894 | { |
6895 | const struct ofpact *a; | |
6fd6ed71 | 6896 | size_t start_size = openflow->size; |
d01c980f BP |
6897 | |
6898 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
c2d936a4 | 6899 | encode_ofpact(a, ofp_version, openflow); |
d01c980f | 6900 | } |
6fd6ed71 | 6901 | return openflow->size - start_size; |
d01c980f BP |
6902 | } |
6903 | ||
c2d936a4 BP |
6904 | static enum ovs_instruction_type |
6905 | ofpact_is_apply_actions(const struct ofpact *a) | |
d01c980f | 6906 | { |
c2d936a4 BP |
6907 | return (ovs_instruction_type_from_ofpact_type(a->type) |
6908 | == OVSINST_OFPIT11_APPLY_ACTIONS); | |
d01c980f | 6909 | } |
8dd54666 IY |
6910 | |
6911 | void | |
e3f8f887 JR |
6912 | ofpacts_put_openflow_instructions(const struct ofpact ofpacts[], |
6913 | size_t ofpacts_len, | |
6914 | struct ofpbuf *openflow, | |
6915 | enum ofp_version ofp_version) | |
8dd54666 | 6916 | { |
c2d936a4 | 6917 | const struct ofpact *end = ofpact_end(ofpacts, ofpacts_len); |
8dd54666 IY |
6918 | const struct ofpact *a; |
6919 | ||
8f2cded4 BP |
6920 | if (ofp_version == OFP10_VERSION) { |
6921 | ofpacts_put_openflow_actions(ofpacts, ofpacts_len, openflow, | |
6922 | ofp_version); | |
6923 | return; | |
6924 | } | |
e3f8f887 | 6925 | |
c2d936a4 BP |
6926 | a = ofpacts; |
6927 | while (a < end) { | |
6928 | if (ofpact_is_apply_actions(a)) { | |
6fd6ed71 | 6929 | size_t ofs = openflow->size; |
8dd54666 IY |
6930 | |
6931 | instruction_put_OFPIT11_APPLY_ACTIONS(openflow); | |
c2d936a4 BP |
6932 | do { |
6933 | encode_ofpact(a, ofp_version, openflow); | |
6934 | a = ofpact_next(a); | |
6935 | } while (a < end && ofpact_is_apply_actions(a)); | |
7fdb60a7 | 6936 | ofpacts_update_instruction_actions(openflow, ofs); |
c2d936a4 BP |
6937 | } else { |
6938 | encode_ofpact(a, ofp_version, openflow); | |
6939 | a = ofpact_next(a); | |
8dd54666 IY |
6940 | } |
6941 | } | |
6942 | } | |
d01c980f | 6943 | \f |
08d1e234 BP |
6944 | /* Sets of supported actions. */ |
6945 | ||
6946 | /* Two-way translation between OVS's internal "OFPACT_*" representation of | |
6947 | * actions and the "OFPAT_*" representation used in some OpenFlow version. | |
6948 | * (OFPAT_* numbering varies from one OpenFlow version to another, so a given | |
6949 | * instance is specific to one OpenFlow version.) */ | |
6950 | struct ofpact_map { | |
6951 | enum ofpact_type ofpact; /* Internal name for action type. */ | |
6952 | int ofpat; /* OFPAT_* number from OpenFlow spec. */ | |
6953 | }; | |
6954 | ||
6955 | static const struct ofpact_map * | |
6956 | get_ofpact_map(enum ofp_version version) | |
6957 | { | |
6958 | /* OpenFlow 1.0 actions. */ | |
6959 | static const struct ofpact_map of10[] = { | |
6960 | { OFPACT_OUTPUT, 0 }, | |
6961 | { OFPACT_SET_VLAN_VID, 1 }, | |
6962 | { OFPACT_SET_VLAN_PCP, 2 }, | |
6963 | { OFPACT_STRIP_VLAN, 3 }, | |
6964 | { OFPACT_SET_ETH_SRC, 4 }, | |
6965 | { OFPACT_SET_ETH_DST, 5 }, | |
6966 | { OFPACT_SET_IPV4_SRC, 6 }, | |
6967 | { OFPACT_SET_IPV4_DST, 7 }, | |
6968 | { OFPACT_SET_IP_DSCP, 8 }, | |
6969 | { OFPACT_SET_L4_SRC_PORT, 9 }, | |
6970 | { OFPACT_SET_L4_DST_PORT, 10 }, | |
6971 | { OFPACT_ENQUEUE, 11 }, | |
6972 | { 0, -1 }, | |
6973 | }; | |
6974 | ||
6975 | /* OpenFlow 1.1 actions. */ | |
6976 | static const struct ofpact_map of11[] = { | |
6977 | { OFPACT_OUTPUT, 0 }, | |
6978 | { OFPACT_SET_VLAN_VID, 1 }, | |
6979 | { OFPACT_SET_VLAN_PCP, 2 }, | |
6980 | { OFPACT_SET_ETH_SRC, 3 }, | |
6981 | { OFPACT_SET_ETH_DST, 4 }, | |
6982 | { OFPACT_SET_IPV4_SRC, 5 }, | |
6983 | { OFPACT_SET_IPV4_DST, 6 }, | |
6984 | { OFPACT_SET_IP_DSCP, 7 }, | |
6985 | { OFPACT_SET_IP_ECN, 8 }, | |
6986 | { OFPACT_SET_L4_SRC_PORT, 9 }, | |
6987 | { OFPACT_SET_L4_DST_PORT, 10 }, | |
6988 | /* OFPAT_COPY_TTL_OUT (11) not supported. */ | |
6989 | /* OFPAT_COPY_TTL_IN (12) not supported. */ | |
6990 | { OFPACT_SET_MPLS_LABEL, 13 }, | |
6991 | { OFPACT_SET_MPLS_TC, 14 }, | |
6992 | { OFPACT_SET_MPLS_TTL, 15 }, | |
6993 | { OFPACT_DEC_MPLS_TTL, 16 }, | |
6994 | { OFPACT_PUSH_VLAN, 17 }, | |
6995 | { OFPACT_STRIP_VLAN, 18 }, | |
6996 | { OFPACT_PUSH_MPLS, 19 }, | |
6997 | { OFPACT_POP_MPLS, 20 }, | |
6998 | { OFPACT_SET_QUEUE, 21 }, | |
6999 | { OFPACT_GROUP, 22 }, | |
7000 | { OFPACT_SET_IP_TTL, 23 }, | |
7001 | { OFPACT_DEC_TTL, 24 }, | |
7002 | { 0, -1 }, | |
7003 | }; | |
7004 | ||
7005 | /* OpenFlow 1.2, 1.3, and 1.4 actions. */ | |
7006 | static const struct ofpact_map of12[] = { | |
7007 | { OFPACT_OUTPUT, 0 }, | |
7008 | /* OFPAT_COPY_TTL_OUT (11) not supported. */ | |
7009 | /* OFPAT_COPY_TTL_IN (12) not supported. */ | |
7010 | { OFPACT_SET_MPLS_TTL, 15 }, | |
7011 | { OFPACT_DEC_MPLS_TTL, 16 }, | |
7012 | { OFPACT_PUSH_VLAN, 17 }, | |
7013 | { OFPACT_STRIP_VLAN, 18 }, | |
7014 | { OFPACT_PUSH_MPLS, 19 }, | |
7015 | { OFPACT_POP_MPLS, 20 }, | |
7016 | { OFPACT_SET_QUEUE, 21 }, | |
7017 | { OFPACT_GROUP, 22 }, | |
7018 | { OFPACT_SET_IP_TTL, 23 }, | |
7019 | { OFPACT_DEC_TTL, 24 }, | |
7020 | { OFPACT_SET_FIELD, 25 }, | |
7021 | /* OF1.3+ OFPAT_PUSH_PBB (26) not supported. */ | |
7022 | /* OF1.3+ OFPAT_POP_PBB (27) not supported. */ | |
7023 | { 0, -1 }, | |
7024 | }; | |
7025 | ||
7026 | switch (version) { | |
7027 | case OFP10_VERSION: | |
7028 | return of10; | |
7029 | ||
7030 | case OFP11_VERSION: | |
7031 | return of11; | |
7032 | ||
7033 | case OFP12_VERSION: | |
7034 | case OFP13_VERSION: | |
7035 | case OFP14_VERSION: | |
7036 | case OFP15_VERSION: | |
7037 | default: | |
7038 | return of12; | |
7039 | } | |
7040 | } | |
7041 | ||
7042 | /* Converts 'ofpacts_bitmap', a bitmap whose bits correspond to OFPACT_* | |
7043 | * values, into a bitmap of actions suitable for OpenFlow 'version', and | |
7044 | * returns the result. */ | |
7045 | ovs_be32 | |
7046 | ofpact_bitmap_to_openflow(uint64_t ofpacts_bitmap, enum ofp_version version) | |
7047 | { | |
7048 | uint32_t openflow_bitmap = 0; | |
7049 | const struct ofpact_map *x; | |
7050 | ||
7051 | for (x = get_ofpact_map(version); x->ofpat >= 0; x++) { | |
7052 | if (ofpacts_bitmap & (UINT64_C(1) << x->ofpact)) { | |
7053 | openflow_bitmap |= 1u << x->ofpat; | |
7054 | } | |
7055 | } | |
7056 | return htonl(openflow_bitmap); | |
7057 | } | |
7058 | ||
7059 | /* Converts 'ofpat_bitmap', a bitmap of actions from an OpenFlow message with | |
7060 | * the given 'version' into a bitmap whose bits correspond to OFPACT_* values, | |
7061 | * and returns the result. */ | |
7062 | uint64_t | |
7063 | ofpact_bitmap_from_openflow(ovs_be32 ofpat_bitmap, enum ofp_version version) | |
7064 | { | |
7065 | uint64_t ofpact_bitmap = 0; | |
7066 | const struct ofpact_map *x; | |
7067 | ||
7068 | for (x = get_ofpact_map(version); x->ofpat >= 0; x++) { | |
7069 | if (ofpat_bitmap & htonl(1u << x->ofpat)) { | |
7070 | ofpact_bitmap |= UINT64_C(1) << x->ofpact; | |
7071 | } | |
7072 | } | |
7073 | return ofpact_bitmap; | |
7074 | } | |
7075 | ||
7076 | /* Appends to 's' a string representation of the set of OFPACT_* represented | |
7077 | * by 'ofpacts_bitmap'. */ | |
7078 | void | |
7079 | ofpact_bitmap_format(uint64_t ofpacts_bitmap, struct ds *s) | |
7080 | { | |
7081 | if (!ofpacts_bitmap) { | |
7082 | ds_put_cstr(s, "<none>"); | |
7083 | } else { | |
7084 | while (ofpacts_bitmap) { | |
7085 | ds_put_format(s, "%s ", | |
7086 | ofpact_name(rightmost_1bit_idx(ofpacts_bitmap))); | |
7087 | ofpacts_bitmap = zero_rightmost_1bit(ofpacts_bitmap); | |
7088 | } | |
7089 | ds_chomp(s, ' '); | |
7090 | } | |
7091 | } | |
7092 | \f | |
f25d0cf3 BP |
7093 | /* Returns true if 'action' outputs to 'port', false otherwise. */ |
7094 | static bool | |
4e022ec0 | 7095 | ofpact_outputs_to_port(const struct ofpact *ofpact, ofp_port_t port) |
f25d0cf3 BP |
7096 | { |
7097 | switch (ofpact->type) { | |
7098 | case OFPACT_OUTPUT: | |
7099 | return ofpact_get_OUTPUT(ofpact)->port == port; | |
7100 | case OFPACT_ENQUEUE: | |
7101 | return ofpact_get_ENQUEUE(ofpact)->port == port; | |
7102 | case OFPACT_CONTROLLER: | |
7103 | return port == OFPP_CONTROLLER; | |
7104 | ||
7105 | case OFPACT_OUTPUT_REG: | |
7106 | case OFPACT_BUNDLE: | |
7107 | case OFPACT_SET_VLAN_VID: | |
7108 | case OFPACT_SET_VLAN_PCP: | |
7109 | case OFPACT_STRIP_VLAN: | |
3e34fbdd | 7110 | case OFPACT_PUSH_VLAN: |
f25d0cf3 BP |
7111 | case OFPACT_SET_ETH_SRC: |
7112 | case OFPACT_SET_ETH_DST: | |
7113 | case OFPACT_SET_IPV4_SRC: | |
7114 | case OFPACT_SET_IPV4_DST: | |
04f01c24 | 7115 | case OFPACT_SET_IP_DSCP: |
ff14eb7a | 7116 | case OFPACT_SET_IP_ECN: |
0c20dbe4 | 7117 | case OFPACT_SET_IP_TTL: |
f25d0cf3 BP |
7118 | case OFPACT_SET_L4_SRC_PORT: |
7119 | case OFPACT_SET_L4_DST_PORT: | |
7120 | case OFPACT_REG_MOVE: | |
b2dd70be | 7121 | case OFPACT_SET_FIELD: |
bd85dac1 AZ |
7122 | case OFPACT_STACK_PUSH: |
7123 | case OFPACT_STACK_POP: | |
f25d0cf3 | 7124 | case OFPACT_DEC_TTL: |
097d4939 JR |
7125 | case OFPACT_SET_MPLS_LABEL: |
7126 | case OFPACT_SET_MPLS_TC: | |
0f3f3c3d | 7127 | case OFPACT_SET_MPLS_TTL: |
b676167a | 7128 | case OFPACT_DEC_MPLS_TTL: |
f25d0cf3 | 7129 | case OFPACT_SET_TUNNEL: |
4cceacb9 | 7130 | case OFPACT_WRITE_METADATA: |
f25d0cf3 BP |
7131 | case OFPACT_SET_QUEUE: |
7132 | case OFPACT_POP_QUEUE: | |
7133 | case OFPACT_FIN_TIMEOUT: | |
7134 | case OFPACT_RESUBMIT: | |
7135 | case OFPACT_LEARN: | |
18080541 | 7136 | case OFPACT_CONJUNCTION: |
f25d0cf3 | 7137 | case OFPACT_MULTIPATH: |
f25d0cf3 BP |
7138 | case OFPACT_NOTE: |
7139 | case OFPACT_EXIT: | |
e672ff9b | 7140 | case OFPACT_UNROLL_XLATE: |
b02475c5 SH |
7141 | case OFPACT_PUSH_MPLS: |
7142 | case OFPACT_POP_MPLS: | |
29089a54 | 7143 | case OFPACT_SAMPLE: |
b19e8793 | 7144 | case OFPACT_CLEAR_ACTIONS: |
7fdb60a7 | 7145 | case OFPACT_WRITE_ACTIONS: |
8dd54666 | 7146 | case OFPACT_GOTO_TABLE: |
638a19b0 | 7147 | case OFPACT_METER: |
7395c052 | 7148 | case OFPACT_GROUP: |
d4abaff5 | 7149 | case OFPACT_DEBUG_RECIRC: |
07659514 | 7150 | case OFPACT_CT: |
9ac0aada | 7151 | case OFPACT_NAT: |
f25d0cf3 BP |
7152 | default: |
7153 | return false; | |
7154 | } | |
7155 | } | |
7156 | ||
7157 | /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs | |
7158 | * to 'port', false otherwise. */ | |
7159 | bool | |
7160 | ofpacts_output_to_port(const struct ofpact *ofpacts, size_t ofpacts_len, | |
4e022ec0 | 7161 | ofp_port_t port) |
c2d936a4 BP |
7162 | { |
7163 | const struct ofpact *a; | |
f25d0cf3 | 7164 | |
4f20179d | 7165 | OFPACT_FOR_EACH_FLATTENED (a, ofpacts, ofpacts_len) { |
c2d936a4 BP |
7166 | if (ofpact_outputs_to_port(a, port)) { |
7167 | return true; | |
7168 | } | |
7169 | } | |
f25d0cf3 | 7170 | |
c2d936a4 BP |
7171 | return false; |
7172 | } | |
f25d0cf3 | 7173 | |
c2d936a4 BP |
7174 | /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs |
7175 | * to 'group', false otherwise. */ | |
7176 | bool | |
7177 | ofpacts_output_to_group(const struct ofpact *ofpacts, size_t ofpacts_len, | |
7178 | uint32_t group_id) | |
7179 | { | |
7180 | const struct ofpact *a; | |
b02475c5 | 7181 | |
4f20179d | 7182 | OFPACT_FOR_EACH_FLATTENED (a, ofpacts, ofpacts_len) { |
c2d936a4 BP |
7183 | if (a->type == OFPACT_GROUP |
7184 | && ofpact_get_GROUP(a)->group_id == group_id) { | |
7185 | return true; | |
7186 | } | |
7187 | } | |
b02475c5 | 7188 | |
c2d936a4 BP |
7189 | return false; |
7190 | } | |
8dd54666 | 7191 | |
c2d936a4 BP |
7192 | bool |
7193 | ofpacts_equal(const struct ofpact *a, size_t a_len, | |
7194 | const struct ofpact *b, size_t b_len) | |
7195 | { | |
7196 | return a_len == b_len && !memcmp(a, b, a_len); | |
7197 | } | |
29089a54 | 7198 | |
c2d936a4 BP |
7199 | /* Finds the OFPACT_METER action, if any, in the 'ofpacts_len' bytes of |
7200 | * 'ofpacts'. If found, returns its meter ID; if not, returns 0. | |
7201 | * | |
7202 | * This function relies on the order of 'ofpacts' being correct (as checked by | |
7203 | * ofpacts_verify()). */ | |
7204 | uint32_t | |
7205 | ofpacts_get_meter(const struct ofpact ofpacts[], size_t ofpacts_len) | |
7206 | { | |
7207 | const struct ofpact *a; | |
7fdb60a7 | 7208 | |
c2d936a4 BP |
7209 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
7210 | enum ovs_instruction_type inst; | |
b19e8793 | 7211 | |
c2d936a4 BP |
7212 | inst = ovs_instruction_type_from_ofpact_type(a->type); |
7213 | if (a->type == OFPACT_METER) { | |
7214 | return ofpact_get_METER(a)->meter_id; | |
7215 | } else if (inst > OVSINST_OFPIT13_METER) { | |
7216 | break; | |
4cceacb9 | 7217 | } |
c2d936a4 | 7218 | } |
638a19b0 | 7219 | |
c2d936a4 BP |
7220 | return 0; |
7221 | } | |
7222 | \f | |
7223 | /* Formatting ofpacts. */ | |
7395c052 | 7224 | |
c2d936a4 BP |
7225 | static void |
7226 | ofpact_format(const struct ofpact *a, struct ds *s) | |
7227 | { | |
7228 | switch (a->type) { | |
7229 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
7230 | case OFPACT_##ENUM: \ | |
7231 | format_##ENUM(ALIGNED_CAST(const struct STRUCT *, a), s); \ | |
7232 | break; | |
7233 | OFPACTS | |
7234 | #undef OFPACT | |
7235 | default: | |
7236 | OVS_NOT_REACHED(); | |
f25d0cf3 BP |
7237 | } |
7238 | } | |
7239 | ||
7240 | /* Appends a string representing the 'ofpacts_len' bytes of ofpacts in | |
7241 | * 'ofpacts' to 'string'. */ | |
7242 | void | |
7243 | ofpacts_format(const struct ofpact *ofpacts, size_t ofpacts_len, | |
7244 | struct ds *string) | |
7245 | { | |
f25d0cf3 BP |
7246 | if (!ofpacts_len) { |
7247 | ds_put_cstr(string, "drop"); | |
7248 | } else { | |
7249 | const struct ofpact *a; | |
7250 | ||
7251 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
7252 | if (a != ofpacts) { | |
7253 | ds_put_cstr(string, ","); | |
7254 | } | |
8dd54666 | 7255 | |
5dca28b5 | 7256 | /* XXX write-actions */ |
f25d0cf3 BP |
7257 | ofpact_format(a, string); |
7258 | } | |
7259 | } | |
7260 | } | |
7261 | \f | |
7262 | /* Internal use by helpers. */ | |
7263 | ||
7264 | void * | |
7265 | ofpact_put(struct ofpbuf *ofpacts, enum ofpact_type type, size_t len) | |
7266 | { | |
7267 | struct ofpact *ofpact; | |
7268 | ||
7269 | ofpact_pad(ofpacts); | |
6fd6ed71 PS |
7270 | ofpacts->header = ofpbuf_put_uninit(ofpacts, len); |
7271 | ofpact = ofpacts->header; | |
f25d0cf3 BP |
7272 | ofpact_init(ofpact, type, len); |
7273 | return ofpact; | |
7274 | } | |
7275 | ||
7276 | void | |
7277 | ofpact_init(struct ofpact *ofpact, enum ofpact_type type, size_t len) | |
7278 | { | |
7279 | memset(ofpact, 0, len); | |
7280 | ofpact->type = type; | |
c2d936a4 | 7281 | ofpact->raw = -1; |
f25d0cf3 BP |
7282 | ofpact->len = len; |
7283 | } | |
7284 | \f | |
7285 | /* Updates 'ofpact->len' to the number of bytes in the tail of 'ofpacts' | |
7286 | * starting at 'ofpact'. | |
7287 | * | |
7288 | * This is the correct way to update a variable-length ofpact's length after | |
7289 | * adding the variable-length part of the payload. (See the large comment | |
7290 | * near the end of ofp-actions.h for more information.) */ | |
7291 | void | |
7292 | ofpact_update_len(struct ofpbuf *ofpacts, struct ofpact *ofpact) | |
7293 | { | |
6fd6ed71 | 7294 | ovs_assert(ofpact == ofpacts->header); |
f25d0cf3 BP |
7295 | ofpact->len = (char *) ofpbuf_tail(ofpacts) - (char *) ofpact; |
7296 | } | |
7297 | ||
7298 | /* Pads out 'ofpacts' to a multiple of OFPACT_ALIGNTO bytes in length. Each | |
7299 | * ofpact_put_<ENUM>() calls this function automatically beforehand, but the | |
7300 | * client must call this itself after adding the final ofpact to an array of | |
7301 | * them. | |
7302 | * | |
7303 | * (The consequences of failing to call this function are probably not dire. | |
7304 | * OFPACT_FOR_EACH will calculate a pointer beyond the end of the ofpacts, but | |
7305 | * not dereference it. That's undefined behavior, technically, but it will not | |
7306 | * cause a real problem on common systems. Still, it seems better to call | |
7307 | * it.) */ | |
7308 | void | |
7309 | ofpact_pad(struct ofpbuf *ofpacts) | |
7310 | { | |
6fd6ed71 | 7311 | unsigned int pad = PAD_SIZE(ofpacts->size, OFPACT_ALIGNTO); |
f6e984d7 BP |
7312 | if (pad) { |
7313 | ofpbuf_put_zeros(ofpacts, pad); | |
f25d0cf3 BP |
7314 | } |
7315 | } | |
c2d936a4 BP |
7316 | \f |
7317 | ||
7318 | ||
7319 | ||
cab50449 | 7320 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7321 | ofpact_parse(enum ofpact_type type, char *value, struct ofpbuf *ofpacts, |
7322 | enum ofputil_protocol *usable_protocols) | |
7323 | { | |
7324 | switch (type) { | |
7325 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
7326 | case OFPACT_##ENUM: \ | |
7327 | return parse_##ENUM(value, ofpacts, usable_protocols); | |
7328 | OFPACTS | |
7329 | #undef OFPACT | |
7330 | default: | |
7331 | OVS_NOT_REACHED(); | |
7332 | } | |
7333 | } | |
7334 | ||
7335 | static bool | |
7336 | ofpact_type_from_name(const char *name, enum ofpact_type *type) | |
7337 | { | |
7338 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
7339 | if (!strcasecmp(name, NAME)) { \ | |
7340 | *type = OFPACT_##ENUM; \ | |
7341 | return true; \ | |
7342 | } | |
7343 | OFPACTS | |
7344 | #undef OFPACT | |
7345 | ||
7346 | return false; | |
7347 | } | |
7348 | ||
7349 | /* Parses 'str' as a series of instructions, and appends them to 'ofpacts'. | |
7350 | * | |
7351 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
d824b5b7 JS |
7352 | * error. The caller is responsible for freeing the returned string. |
7353 | * | |
7354 | * If 'outer_action' is specified, indicates that the actions being parsed | |
7355 | * are nested within another action of the type specified in 'outer_action'. */ | |
cab50449 | 7356 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7357 | ofpacts_parse__(char *str, struct ofpbuf *ofpacts, |
7358 | enum ofputil_protocol *usable_protocols, | |
d824b5b7 | 7359 | bool allow_instructions, enum ofpact_type outer_action) |
c2d936a4 BP |
7360 | { |
7361 | int prev_inst = -1; | |
7362 | enum ofperr retval; | |
7363 | char *key, *value; | |
7364 | bool drop = false; | |
7365 | char *pos; | |
7366 | ||
7367 | pos = str; | |
7368 | while (ofputil_parse_key_value(&pos, &key, &value)) { | |
7369 | enum ovs_instruction_type inst = OVSINST_OFPIT11_APPLY_ACTIONS; | |
7370 | enum ofpact_type type; | |
7371 | char *error = NULL; | |
7372 | ofp_port_t port; | |
7373 | ||
7374 | if (ofpact_type_from_name(key, &type)) { | |
7375 | error = ofpact_parse(type, value, ofpacts, usable_protocols); | |
7376 | inst = ovs_instruction_type_from_ofpact_type(type); | |
7377 | } else if (!strcasecmp(key, "mod_vlan_vid")) { | |
7378 | error = parse_set_vlan_vid(value, ofpacts, true); | |
7379 | } else if (!strcasecmp(key, "mod_vlan_pcp")) { | |
7380 | error = parse_set_vlan_pcp(value, ofpacts, true); | |
7381 | } else if (!strcasecmp(key, "set_nw_ttl")) { | |
7382 | error = parse_SET_IP_TTL(value, ofpacts, usable_protocols); | |
7383 | } else if (!strcasecmp(key, "pop_vlan")) { | |
7384 | error = parse_pop_vlan(ofpacts); | |
7385 | } else if (!strcasecmp(key, "set_tunnel64")) { | |
7386 | error = parse_set_tunnel(value, ofpacts, | |
7387 | NXAST_RAW_SET_TUNNEL64); | |
7eb4b1f1 BP |
7388 | } else if (!strcasecmp(key, "load")) { |
7389 | error = parse_reg_load(value, ofpacts); | |
c2d936a4 BP |
7390 | } else if (!strcasecmp(key, "bundle_load")) { |
7391 | error = parse_bundle_load(value, ofpacts); | |
7392 | } else if (!strcasecmp(key, "drop")) { | |
7393 | drop = true; | |
7394 | } else if (!strcasecmp(key, "apply_actions")) { | |
7395 | return xstrdup("apply_actions is the default instruction"); | |
7396 | } else if (ofputil_port_from_string(key, &port)) { | |
7397 | ofpact_put_OUTPUT(ofpacts)->port = port; | |
7398 | } else { | |
7399 | return xasprintf("unknown action %s", key); | |
7400 | } | |
7401 | if (error) { | |
7402 | return error; | |
7403 | } | |
7404 | ||
7405 | if (inst != OVSINST_OFPIT11_APPLY_ACTIONS) { | |
7406 | if (!allow_instructions) { | |
7407 | return xasprintf("only actions are allowed here (not " | |
7408 | "instruction %s)", | |
7409 | ovs_instruction_name_from_type(inst)); | |
7410 | } | |
7411 | if (inst == prev_inst) { | |
7412 | return xasprintf("instruction %s may be specified only once", | |
7413 | ovs_instruction_name_from_type(inst)); | |
7414 | } | |
7415 | } | |
7416 | if (prev_inst != -1 && inst < prev_inst) { | |
7417 | return xasprintf("instruction %s must be specified before %s", | |
7418 | ovs_instruction_name_from_type(inst), | |
7419 | ovs_instruction_name_from_type(prev_inst)); | |
7420 | } | |
7421 | prev_inst = inst; | |
7422 | } | |
7423 | ofpact_pad(ofpacts); | |
7424 | ||
6fd6ed71 | 7425 | if (drop && ofpacts->size) { |
c2d936a4 BP |
7426 | return xstrdup("\"drop\" must not be accompanied by any other action " |
7427 | "or instruction"); | |
7428 | } | |
7429 | ||
6fd6ed71 | 7430 | retval = ofpacts_verify(ofpacts->data, ofpacts->size, |
c2d936a4 BP |
7431 | (allow_instructions |
7432 | ? (1u << N_OVS_INSTRUCTIONS) - 1 | |
d824b5b7 JS |
7433 | : 1u << OVSINST_OFPIT11_APPLY_ACTIONS), |
7434 | outer_action); | |
c2d936a4 BP |
7435 | if (retval) { |
7436 | return xstrdup("Incorrect instruction ordering"); | |
7437 | } | |
7438 | ||
7439 | return NULL; | |
7440 | } | |
7441 | ||
cab50449 | 7442 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 7443 | ofpacts_parse(char *str, struct ofpbuf *ofpacts, |
d824b5b7 JS |
7444 | enum ofputil_protocol *usable_protocols, bool allow_instructions, |
7445 | enum ofpact_type outer_action) | |
c2d936a4 | 7446 | { |
6fd6ed71 | 7447 | uint32_t orig_size = ofpacts->size; |
c2d936a4 | 7448 | char *error = ofpacts_parse__(str, ofpacts, usable_protocols, |
d824b5b7 | 7449 | allow_instructions, outer_action); |
c2d936a4 | 7450 | if (error) { |
6fd6ed71 | 7451 | ofpacts->size = orig_size; |
c2d936a4 BP |
7452 | } |
7453 | return error; | |
7454 | } | |
7455 | ||
cab50449 | 7456 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7457 | ofpacts_parse_copy(const char *s_, struct ofpbuf *ofpacts, |
7458 | enum ofputil_protocol *usable_protocols, | |
d824b5b7 | 7459 | bool allow_instructions, enum ofpact_type outer_action) |
c2d936a4 BP |
7460 | { |
7461 | char *error, *s; | |
7462 | ||
7463 | *usable_protocols = OFPUTIL_P_ANY; | |
7464 | ||
7465 | s = xstrdup(s_); | |
d824b5b7 JS |
7466 | error = ofpacts_parse(s, ofpacts, usable_protocols, allow_instructions, |
7467 | outer_action); | |
c2d936a4 BP |
7468 | free(s); |
7469 | ||
7470 | return error; | |
7471 | } | |
7472 | ||
7473 | /* Parses 's' as a set of OpenFlow actions and appends the actions to | |
d824b5b7 JS |
7474 | * 'ofpacts'. 'outer_action', if nonzero, specifies that 's' contains actions |
7475 | * that are nested within the action of type 'outer_action'. | |
c2d936a4 BP |
7476 | * |
7477 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
7478 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 7479 | char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7480 | ofpacts_parse_actions(const char *s, struct ofpbuf *ofpacts, |
7481 | enum ofputil_protocol *usable_protocols) | |
7482 | { | |
d824b5b7 | 7483 | return ofpacts_parse_copy(s, ofpacts, usable_protocols, false, 0); |
c2d936a4 BP |
7484 | } |
7485 | ||
7486 | /* Parses 's' as a set of OpenFlow instructions and appends the instructions to | |
7487 | * 'ofpacts'. | |
7488 | * | |
7489 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
7490 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 7491 | char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7492 | ofpacts_parse_instructions(const char *s, struct ofpbuf *ofpacts, |
7493 | enum ofputil_protocol *usable_protocols) | |
7494 | { | |
d824b5b7 | 7495 | return ofpacts_parse_copy(s, ofpacts, usable_protocols, true, 0); |
c2d936a4 | 7496 | } |
08d1e234 BP |
7497 | |
7498 | const char * | |
7499 | ofpact_name(enum ofpact_type type) | |
7500 | { | |
7501 | switch (type) { | |
7502 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) case OFPACT_##ENUM: return NAME; | |
7503 | OFPACTS | |
7504 | #undef OFPACT | |
7505 | } | |
7506 | return "<unknown>"; | |
7507 | } | |
c2d936a4 BP |
7508 | \f |
7509 | /* Low-level action decoding and encoding functions. */ | |
7510 | ||
7511 | /* Everything needed to identify a particular OpenFlow action. */ | |
7512 | struct ofpact_hdrs { | |
7513 | uint32_t vendor; /* 0 if standard, otherwise a vendor code. */ | |
7514 | uint16_t type; /* Type if standard, otherwise subtype. */ | |
7515 | uint8_t ofp_version; /* From ofp_header. */ | |
7516 | }; | |
7517 | ||
7518 | /* Information about a particular OpenFlow action. */ | |
7519 | struct ofpact_raw_instance { | |
7520 | /* The action's identity. */ | |
7521 | struct ofpact_hdrs hdrs; | |
7522 | enum ofp_raw_action_type raw; | |
7523 | ||
7524 | /* Looking up the action. */ | |
7525 | struct hmap_node decode_node; /* Based on 'hdrs'. */ | |
7526 | struct hmap_node encode_node; /* Based on 'raw' + 'hdrs.ofp_version'. */ | |
7527 | ||
7528 | /* The action's encoded size. | |
7529 | * | |
7530 | * If this action is fixed-length, 'min_length' == 'max_length'. | |
7531 | * If it is variable length, then 'max_length' is ROUND_DOWN(UINT16_MAX, | |
7532 | * OFP_ACTION_ALIGN) == 65528. */ | |
7533 | unsigned short int min_length; | |
7534 | unsigned short int max_length; | |
7535 | ||
7536 | /* For actions with a simple integer numeric argument, 'arg_ofs' is the | |
7537 | * offset of that argument from the beginning of the action and 'arg_len' | |
7538 | * its length, both in bytes. | |
7539 | * | |
7540 | * For actions that take other forms, these are both zero. */ | |
7541 | unsigned short int arg_ofs; | |
7542 | unsigned short int arg_len; | |
7543 | ||
7544 | /* The name of the action, e.g. "OFPAT_OUTPUT" or "NXAST_RESUBMIT". */ | |
7545 | const char *name; | |
7546 | ||
7547 | /* If this action is deprecated, a human-readable string with a brief | |
7548 | * explanation. */ | |
7549 | const char *deprecation; | |
7550 | }; | |
7551 | ||
7552 | /* Action header. */ | |
7553 | struct ofp_action_header { | |
7554 | /* The meaning of other values of 'type' generally depends on the OpenFlow | |
7555 | * version (see enum ofp_raw_action_type). | |
7556 | * | |
7557 | * Across all OpenFlow versions, OFPAT_VENDOR indicates that 'vendor' | |
7558 | * designates an OpenFlow vendor ID and that the remainder of the action | |
7559 | * structure has a vendor-defined meaning. | |
7560 | */ | |
7561 | #define OFPAT_VENDOR 0xffff | |
7562 | ovs_be16 type; | |
7563 | ||
7564 | /* Always a multiple of 8. */ | |
7565 | ovs_be16 len; | |
7566 | ||
7567 | /* For type == OFPAT_VENDOR only, this is a vendor ID, e.g. NX_VENDOR_ID or | |
7568 | * ONF_VENDOR_ID. Other 'type's use this space for some other purpose. */ | |
7569 | ovs_be32 vendor; | |
7570 | }; | |
7571 | OFP_ASSERT(sizeof(struct ofp_action_header) == 8); | |
7572 | ||
232c1e12 BP |
7573 | /* Header for Nicira-defined actions and for ONF vendor extensions. |
7574 | * | |
7575 | * This cannot be used as an entirely generic vendor extension action header, | |
7576 | * because OpenFlow does not specify the location or size of the action | |
7577 | * subtype; it just happens that ONF extensions and Nicira extensions share | |
7578 | * this format. */ | |
7579 | struct ext_action_header { | |
c2d936a4 BP |
7580 | ovs_be16 type; /* OFPAT_VENDOR. */ |
7581 | ovs_be16 len; /* At least 16. */ | |
232c1e12 | 7582 | ovs_be32 vendor; /* NX_VENDOR_ID or ONF_VENDOR_ID. */ |
c2d936a4 BP |
7583 | ovs_be16 subtype; /* See enum ofp_raw_action_type. */ |
7584 | uint8_t pad[6]; | |
7585 | }; | |
232c1e12 | 7586 | OFP_ASSERT(sizeof(struct ext_action_header) == 16); |
c2d936a4 BP |
7587 | |
7588 | static bool | |
7589 | ofpact_hdrs_equal(const struct ofpact_hdrs *a, | |
7590 | const struct ofpact_hdrs *b) | |
7591 | { | |
7592 | return (a->vendor == b->vendor | |
7593 | && a->type == b->type | |
7594 | && a->ofp_version == b->ofp_version); | |
7595 | } | |
7596 | ||
7597 | static uint32_t | |
7598 | ofpact_hdrs_hash(const struct ofpact_hdrs *hdrs) | |
7599 | { | |
7600 | return hash_2words(hdrs->vendor, (hdrs->type << 16) | hdrs->ofp_version); | |
7601 | } | |
7602 | ||
7603 | #include "ofp-actions.inc2" | |
7604 | ||
7605 | static struct hmap * | |
7606 | ofpact_decode_hmap(void) | |
7607 | { | |
7608 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
7609 | static struct hmap hmap; | |
7610 | ||
7611 | if (ovsthread_once_start(&once)) { | |
7612 | struct ofpact_raw_instance *inst; | |
7613 | ||
7614 | hmap_init(&hmap); | |
7615 | for (inst = all_raw_instances; | |
7616 | inst < &all_raw_instances[ARRAY_SIZE(all_raw_instances)]; | |
7617 | inst++) { | |
7618 | hmap_insert(&hmap, &inst->decode_node, | |
7619 | ofpact_hdrs_hash(&inst->hdrs)); | |
7620 | } | |
7621 | ovsthread_once_done(&once); | |
7622 | } | |
7623 | return &hmap; | |
7624 | } | |
7625 | ||
7626 | static struct hmap * | |
7627 | ofpact_encode_hmap(void) | |
7628 | { | |
7629 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
7630 | static struct hmap hmap; | |
7631 | ||
7632 | if (ovsthread_once_start(&once)) { | |
7633 | struct ofpact_raw_instance *inst; | |
7634 | ||
7635 | hmap_init(&hmap); | |
7636 | for (inst = all_raw_instances; | |
7637 | inst < &all_raw_instances[ARRAY_SIZE(all_raw_instances)]; | |
7638 | inst++) { | |
7639 | hmap_insert(&hmap, &inst->encode_node, | |
7640 | hash_2words(inst->raw, inst->hdrs.ofp_version)); | |
7641 | } | |
7642 | ovsthread_once_done(&once); | |
7643 | } | |
7644 | return &hmap; | |
7645 | } | |
7646 | ||
7647 | static enum ofperr | |
7648 | ofpact_decode_raw(enum ofp_version ofp_version, | |
7649 | const struct ofp_action_header *oah, size_t length, | |
7650 | const struct ofpact_raw_instance **instp) | |
7651 | { | |
7652 | const struct ofpact_raw_instance *inst; | |
7653 | struct ofpact_hdrs hdrs; | |
7654 | ||
7655 | *instp = NULL; | |
7656 | if (length < sizeof *oah) { | |
7657 | return OFPERR_OFPBAC_BAD_LEN; | |
7658 | } | |
7659 | ||
7660 | /* Get base action type. */ | |
7661 | if (oah->type == htons(OFPAT_VENDOR)) { | |
7662 | /* Get vendor. */ | |
7663 | hdrs.vendor = ntohl(oah->vendor); | |
232c1e12 BP |
7664 | if (hdrs.vendor == NX_VENDOR_ID || hdrs.vendor == ONF_VENDOR_ID) { |
7665 | /* Get extension subtype. */ | |
7666 | const struct ext_action_header *nah; | |
c2d936a4 | 7667 | |
232c1e12 | 7668 | nah = ALIGNED_CAST(const struct ext_action_header *, oah); |
c2d936a4 BP |
7669 | if (length < sizeof *nah) { |
7670 | return OFPERR_OFPBAC_BAD_LEN; | |
7671 | } | |
7672 | hdrs.type = ntohs(nah->subtype); | |
7673 | } else { | |
7674 | VLOG_WARN_RL(&rl, "OpenFlow action has unknown vendor %#"PRIx32, | |
7675 | hdrs.vendor); | |
7676 | return OFPERR_OFPBAC_BAD_VENDOR; | |
7677 | } | |
7678 | } else { | |
7679 | hdrs.vendor = 0; | |
7680 | hdrs.type = ntohs(oah->type); | |
7681 | } | |
7682 | ||
7683 | hdrs.ofp_version = ofp_version; | |
7684 | HMAP_FOR_EACH_WITH_HASH (inst, decode_node, ofpact_hdrs_hash(&hdrs), | |
7685 | ofpact_decode_hmap()) { | |
7686 | if (ofpact_hdrs_equal(&hdrs, &inst->hdrs)) { | |
7687 | *instp = inst; | |
7688 | return 0; | |
7689 | } | |
7690 | } | |
7691 | ||
7692 | return (hdrs.vendor | |
7693 | ? OFPERR_OFPBAC_BAD_VENDOR_TYPE | |
7694 | : OFPERR_OFPBAC_BAD_TYPE); | |
7695 | } | |
7696 | ||
7697 | static enum ofperr | |
7698 | ofpact_pull_raw(struct ofpbuf *buf, enum ofp_version ofp_version, | |
7699 | enum ofp_raw_action_type *raw, uint64_t *arg) | |
7700 | { | |
6fd6ed71 | 7701 | const struct ofp_action_header *oah = buf->data; |
c2d936a4 BP |
7702 | const struct ofpact_raw_instance *action; |
7703 | unsigned int length; | |
7704 | enum ofperr error; | |
7705 | ||
7706 | *raw = *arg = 0; | |
6fd6ed71 | 7707 | error = ofpact_decode_raw(ofp_version, oah, buf->size, &action); |
c2d936a4 BP |
7708 | if (error) { |
7709 | return error; | |
7710 | } | |
7711 | ||
7712 | if (action->deprecation) { | |
7713 | VLOG_INFO_RL(&rl, "%s is deprecated in %s (%s)", | |
7714 | action->name, ofputil_version_to_string(ofp_version), | |
7715 | action->deprecation); | |
7716 | } | |
7717 | ||
7718 | length = ntohs(oah->len); | |
6fd6ed71 | 7719 | if (length > buf->size) { |
b153b990 | 7720 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u exceeds action buffer " |
6fd6ed71 | 7721 | "length %"PRIu32, action->name, length, buf->size); |
b153b990 BP |
7722 | return OFPERR_OFPBAC_BAD_LEN; |
7723 | } | |
c2d936a4 BP |
7724 | if (length < action->min_length || length > action->max_length) { |
7725 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u not in valid range " | |
7726 | "[%hu,%hu]", action->name, length, | |
7727 | action->min_length, action->max_length); | |
7728 | return OFPERR_OFPBAC_BAD_LEN; | |
7729 | } | |
7730 | if (length % 8) { | |
7731 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u is not a multiple " | |
7732 | "of 8", action->name, length); | |
7733 | return OFPERR_OFPBAC_BAD_LEN; | |
7734 | } | |
7735 | ||
7736 | *raw = action->raw; | |
7737 | *arg = 0; | |
7738 | if (action->arg_len) { | |
7739 | const uint8_t *p; | |
7740 | int i; | |
7741 | ||
7742 | p = ofpbuf_at_assert(buf, action->arg_ofs, action->arg_len); | |
7743 | for (i = 0; i < action->arg_len; i++) { | |
7744 | *arg = (*arg << 8) | p[i]; | |
7745 | } | |
7746 | } | |
7747 | ||
7748 | ofpbuf_pull(buf, length); | |
7749 | ||
7750 | return 0; | |
7751 | } | |
7752 | ||
7753 | static const struct ofpact_raw_instance * | |
7754 | ofpact_raw_lookup(enum ofp_version ofp_version, enum ofp_raw_action_type raw) | |
7755 | { | |
7756 | const struct ofpact_raw_instance *inst; | |
7757 | ||
7758 | HMAP_FOR_EACH_WITH_HASH (inst, encode_node, hash_2words(raw, ofp_version), | |
7759 | ofpact_encode_hmap()) { | |
7760 | if (inst->raw == raw && inst->hdrs.ofp_version == ofp_version) { | |
7761 | return inst; | |
7762 | } | |
7763 | } | |
7764 | OVS_NOT_REACHED(); | |
7765 | } | |
7766 | ||
7767 | static void * | |
7768 | ofpact_put_raw(struct ofpbuf *buf, enum ofp_version ofp_version, | |
7769 | enum ofp_raw_action_type raw, uint64_t arg) | |
7770 | { | |
7771 | const struct ofpact_raw_instance *inst; | |
7772 | struct ofp_action_header *oah; | |
7773 | const struct ofpact_hdrs *hdrs; | |
7774 | ||
7775 | inst = ofpact_raw_lookup(ofp_version, raw); | |
7776 | hdrs = &inst->hdrs; | |
7777 | ||
7778 | oah = ofpbuf_put_zeros(buf, inst->min_length); | |
7779 | oah->type = htons(hdrs->vendor ? OFPAT_VENDOR : hdrs->type); | |
7780 | oah->len = htons(inst->min_length); | |
7781 | oah->vendor = htonl(hdrs->vendor); | |
7782 | ||
7783 | switch (hdrs->vendor) { | |
7784 | case 0: | |
7785 | break; | |
7786 | ||
232c1e12 BP |
7787 | case NX_VENDOR_ID: |
7788 | case ONF_VENDOR_ID: { | |
7789 | struct ext_action_header *nah = (struct ext_action_header *) oah; | |
c2d936a4 BP |
7790 | nah->subtype = htons(hdrs->type); |
7791 | break; | |
7792 | } | |
7793 | ||
7794 | default: | |
7795 | OVS_NOT_REACHED(); | |
7796 | } | |
7797 | ||
7798 | if (inst->arg_len) { | |
7799 | uint8_t *p = (uint8_t *) oah + inst->arg_ofs + inst->arg_len; | |
7800 | int i; | |
7801 | ||
7802 | for (i = 0; i < inst->arg_len; i++) { | |
7803 | *--p = arg; | |
7804 | arg >>= 8; | |
7805 | } | |
7806 | } else { | |
7807 | ovs_assert(!arg); | |
7808 | } | |
7809 | ||
7810 | return oah; | |
7811 | } | |
178742f9 BP |
7812 | |
7813 | static void | |
7814 | pad_ofpat(struct ofpbuf *openflow, size_t start_ofs) | |
7815 | { | |
7816 | struct ofp_action_header *oah; | |
7817 | ||
9ac0aada JR |
7818 | ofpbuf_put_zeros(openflow, PAD_SIZE(openflow->size - start_ofs, |
7819 | OFP_ACTION_ALIGN)); | |
178742f9 BP |
7820 | |
7821 | oah = ofpbuf_at_assert(openflow, start_ofs, sizeof *oah); | |
6fd6ed71 | 7822 | oah->len = htons(openflow->size - start_ofs); |
178742f9 BP |
7823 | } |
7824 |