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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 | ||
d824b5b7 JS |
447 | ofs = ofpacts->size; |
448 | ofpbuf_pull(ofpacts, ofs); | |
449 | ||
450 | return ofs; | |
451 | } | |
c2d936a4 BP |
452 | |
453 | #include "ofp-actions.inc1" | |
454 | \f | |
455 | /* Output actions. */ | |
456 | ||
457 | /* Action structure for OFPAT10_OUTPUT, which sends packets out 'port'. | |
458 | * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max | |
459 | * number of bytes to send. A 'max_len' of zero means no bytes of the | |
460 | * packet should be sent. */ | |
461 | struct ofp10_action_output { | |
462 | ovs_be16 type; /* OFPAT10_OUTPUT. */ | |
463 | ovs_be16 len; /* Length is 8. */ | |
464 | ovs_be16 port; /* Output port. */ | |
465 | ovs_be16 max_len; /* Max length to send to controller. */ | |
e45e72f1 | 466 | }; |
c2d936a4 BP |
467 | OFP_ASSERT(sizeof(struct ofp10_action_output) == 8); |
468 | ||
469 | /* Action structure for OFPAT_OUTPUT, which sends packets out 'port'. | |
470 | * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max | |
471 | * number of bytes to send. A 'max_len' of zero means no bytes of the | |
472 | * packet should be sent.*/ | |
473 | struct ofp11_action_output { | |
474 | ovs_be16 type; /* OFPAT11_OUTPUT. */ | |
475 | ovs_be16 len; /* Length is 16. */ | |
476 | ovs_be32 port; /* Output port. */ | |
477 | ovs_be16 max_len; /* Max length to send to controller. */ | |
478 | uint8_t pad[6]; /* Pad to 64 bits. */ | |
479 | }; | |
480 | OFP_ASSERT(sizeof(struct ofp11_action_output) == 16); | |
e45e72f1 | 481 | |
f25d0cf3 | 482 | static enum ofperr |
c2d936a4 | 483 | decode_OFPAT_RAW10_OUTPUT(const struct ofp10_action_output *oao, |
f3cd3ac7 | 484 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 485 | struct ofpbuf *out) |
f25d0cf3 BP |
486 | { |
487 | struct ofpact_output *output; | |
488 | ||
489 | output = ofpact_put_OUTPUT(out); | |
4e022ec0 | 490 | output->port = u16_to_ofp(ntohs(oao->port)); |
f25d0cf3 BP |
491 | output->max_len = ntohs(oao->max_len); |
492 | ||
57ad4e9e | 493 | return ofpact_check_output_port(output->port, OFPP_MAX); |
f25d0cf3 BP |
494 | } |
495 | ||
496 | static enum ofperr | |
c2d936a4 | 497 | decode_OFPAT_RAW11_OUTPUT(const struct ofp11_action_output *oao, |
f3cd3ac7 JS |
498 | enum ofp_version ofp_version OVS_UNUSED, |
499 | struct ofpbuf *out) | |
f25d0cf3 | 500 | { |
c2d936a4 BP |
501 | struct ofpact_output *output; |
502 | enum ofperr error; | |
f25d0cf3 | 503 | |
c2d936a4 BP |
504 | output = ofpact_put_OUTPUT(out); |
505 | output->max_len = ntohs(oao->max_len); | |
506 | ||
507 | error = ofputil_port_from_ofp11(oao->port, &output->port); | |
508 | if (error) { | |
509 | return error; | |
f25d0cf3 | 510 | } |
c2d936a4 BP |
511 | |
512 | return ofpact_check_output_port(output->port, OFPP_MAX); | |
f25d0cf3 BP |
513 | } |
514 | ||
515 | static void | |
c2d936a4 BP |
516 | encode_OUTPUT(const struct ofpact_output *output, |
517 | enum ofp_version ofp_version, struct ofpbuf *out) | |
f25d0cf3 | 518 | { |
c2d936a4 BP |
519 | if (ofp_version == OFP10_VERSION) { |
520 | struct ofp10_action_output *oao; | |
f25d0cf3 | 521 | |
c2d936a4 BP |
522 | oao = put_OFPAT10_OUTPUT(out); |
523 | oao->port = htons(ofp_to_u16(output->port)); | |
524 | oao->max_len = htons(output->max_len); | |
525 | } else { | |
526 | struct ofp11_action_output *oao; | |
527 | ||
528 | oao = put_OFPAT11_OUTPUT(out); | |
529 | oao->port = ofputil_port_to_ofp11(output->port); | |
530 | oao->max_len = htons(output->max_len); | |
531 | } | |
f25d0cf3 BP |
532 | } |
533 | ||
cab50449 | 534 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
535 | parse_OUTPUT(const char *arg, struct ofpbuf *ofpacts, |
536 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
f25d0cf3 | 537 | { |
c2d936a4 BP |
538 | if (strchr(arg, '[')) { |
539 | struct ofpact_output_reg *output_reg; | |
f25d0cf3 | 540 | |
c2d936a4 BP |
541 | output_reg = ofpact_put_OUTPUT_REG(ofpacts); |
542 | output_reg->max_len = UINT16_MAX; | |
543 | return mf_parse_subfield(&output_reg->src, arg); | |
544 | } else { | |
545 | struct ofpact_output *output; | |
546 | ||
547 | output = ofpact_put_OUTPUT(ofpacts); | |
548 | if (!ofputil_port_from_string(arg, &output->port)) { | |
549 | return xasprintf("%s: output to unknown port", arg); | |
550 | } | |
551 | output->max_len = output->port == OFPP_CONTROLLER ? UINT16_MAX : 0; | |
552 | return NULL; | |
f25d0cf3 | 553 | } |
c2d936a4 | 554 | } |
f25d0cf3 | 555 | |
c2d936a4 BP |
556 | static void |
557 | format_OUTPUT(const struct ofpact_output *a, struct ds *s) | |
558 | { | |
559 | if (ofp_to_u16(a->port) < ofp_to_u16(OFPP_MAX)) { | |
560 | ds_put_format(s, "output:%"PRIu16, a->port); | |
561 | } else { | |
562 | ofputil_format_port(a->port, s); | |
563 | if (a->port == OFPP_CONTROLLER) { | |
564 | ds_put_format(s, ":%"PRIu16, a->max_len); | |
565 | } | |
566 | } | |
f25d0cf3 | 567 | } |
c2d936a4 BP |
568 | \f |
569 | /* Group actions. */ | |
f25d0cf3 BP |
570 | |
571 | static enum ofperr | |
f3cd3ac7 JS |
572 | decode_OFPAT_RAW11_GROUP(uint32_t group_id, |
573 | enum ofp_version ofp_version OVS_UNUSED, | |
574 | struct ofpbuf *out) | |
f25d0cf3 | 575 | { |
c2d936a4 BP |
576 | ofpact_put_GROUP(out)->group_id = group_id; |
577 | return 0; | |
578 | } | |
f25d0cf3 | 579 | |
c2d936a4 BP |
580 | static void |
581 | encode_GROUP(const struct ofpact_group *group, | |
582 | enum ofp_version ofp_version, struct ofpbuf *out) | |
583 | { | |
584 | if (ofp_version == OFP10_VERSION) { | |
585 | /* XXX */ | |
586 | } else { | |
587 | put_OFPAT11_GROUP(out, group->group_id); | |
f25d0cf3 | 588 | } |
c2d936a4 | 589 | } |
f25d0cf3 | 590 | |
cab50449 | 591 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
592 | parse_GROUP(char *arg, struct ofpbuf *ofpacts, |
593 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
594 | { | |
595 | return str_to_u32(arg, &ofpact_put_GROUP(ofpacts)->group_id); | |
f25d0cf3 BP |
596 | } |
597 | ||
598 | static void | |
c2d936a4 | 599 | format_GROUP(const struct ofpact_group *a, struct ds *s) |
f25d0cf3 | 600 | { |
c2d936a4 | 601 | ds_put_format(s, "group:%"PRIu32, a->group_id); |
f25d0cf3 | 602 | } |
c2d936a4 BP |
603 | \f |
604 | /* Action structure for NXAST_CONTROLLER. | |
605 | * | |
606 | * This generalizes using OFPAT_OUTPUT to send a packet to OFPP_CONTROLLER. In | |
607 | * addition to the 'max_len' that OFPAT_OUTPUT supports, it also allows | |
608 | * specifying: | |
609 | * | |
610 | * - 'reason': The reason code to use in the ofp_packet_in or nx_packet_in. | |
611 | * | |
612 | * - 'controller_id': The ID of the controller connection to which the | |
613 | * ofp_packet_in should be sent. The ofp_packet_in or nx_packet_in is | |
614 | * sent only to controllers that have the specified controller connection | |
615 | * ID. See "struct nx_controller_id" for more information. */ | |
616 | struct nx_action_controller { | |
617 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
618 | ovs_be16 len; /* Length is 16. */ | |
619 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
620 | ovs_be16 subtype; /* NXAST_CONTROLLER. */ | |
621 | ovs_be16 max_len; /* Maximum length to send to controller. */ | |
622 | ovs_be16 controller_id; /* Controller ID to send packet-in. */ | |
623 | uint8_t reason; /* enum ofp_packet_in_reason (OFPR_*). */ | |
624 | uint8_t zero; /* Must be zero. */ | |
625 | }; | |
626 | OFP_ASSERT(sizeof(struct nx_action_controller) == 16); | |
f25d0cf3 | 627 | |
c2d936a4 BP |
628 | static enum ofperr |
629 | decode_NXAST_RAW_CONTROLLER(const struct nx_action_controller *nac, | |
f3cd3ac7 | 630 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 631 | struct ofpbuf *out) |
f25d0cf3 BP |
632 | { |
633 | struct ofpact_controller *oc; | |
634 | ||
635 | oc = ofpact_put_CONTROLLER(out); | |
636 | oc->max_len = ntohs(nac->max_len); | |
637 | oc->controller_id = ntohs(nac->controller_id); | |
638 | oc->reason = nac->reason; | |
c2d936a4 | 639 | return 0; |
f25d0cf3 BP |
640 | } |
641 | ||
c2d936a4 BP |
642 | static void |
643 | encode_CONTROLLER(const struct ofpact_controller *controller, | |
644 | enum ofp_version ofp_version OVS_UNUSED, | |
645 | struct ofpbuf *out) | |
4cceacb9 | 646 | { |
c2d936a4 | 647 | struct nx_action_controller *nac; |
4cceacb9 | 648 | |
c2d936a4 BP |
649 | nac = put_NXAST_CONTROLLER(out); |
650 | nac->max_len = htons(controller->max_len); | |
651 | nac->controller_id = htons(controller->controller_id); | |
652 | nac->reason = controller->reason; | |
653 | } | |
654 | ||
cab50449 | 655 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
656 | parse_CONTROLLER(char *arg, struct ofpbuf *ofpacts, |
657 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
658 | { | |
659 | enum ofp_packet_in_reason reason = OFPR_ACTION; | |
660 | uint16_t controller_id = 0; | |
661 | uint16_t max_len = UINT16_MAX; | |
662 | ||
663 | if (!arg[0]) { | |
664 | /* Use defaults. */ | |
665 | } else if (strspn(arg, "0123456789") == strlen(arg)) { | |
666 | char *error = str_to_u16(arg, "max_len", &max_len); | |
667 | if (error) { | |
668 | return error; | |
669 | } | |
670 | } else { | |
671 | char *name, *value; | |
672 | ||
673 | while (ofputil_parse_key_value(&arg, &name, &value)) { | |
674 | if (!strcmp(name, "reason")) { | |
675 | if (!ofputil_packet_in_reason_from_string(value, &reason)) { | |
676 | return xasprintf("unknown reason \"%s\"", value); | |
677 | } | |
678 | } else if (!strcmp(name, "max_len")) { | |
679 | char *error = str_to_u16(value, "max_len", &max_len); | |
680 | if (error) { | |
681 | return error; | |
682 | } | |
683 | } else if (!strcmp(name, "id")) { | |
684 | char *error = str_to_u16(value, "id", &controller_id); | |
685 | if (error) { | |
686 | return error; | |
687 | } | |
688 | } else { | |
689 | return xasprintf("unknown key \"%s\" parsing controller " | |
690 | "action", name); | |
691 | } | |
692 | } | |
4cceacb9 JS |
693 | } |
694 | ||
c2d936a4 BP |
695 | if (reason == OFPR_ACTION && controller_id == 0) { |
696 | struct ofpact_output *output; | |
4cceacb9 | 697 | |
c2d936a4 BP |
698 | output = ofpact_put_OUTPUT(ofpacts); |
699 | output->port = OFPP_CONTROLLER; | |
700 | output->max_len = max_len; | |
701 | } else { | |
702 | struct ofpact_controller *controller; | |
703 | ||
704 | controller = ofpact_put_CONTROLLER(ofpacts); | |
705 | controller->max_len = max_len; | |
706 | controller->reason = reason; | |
707 | controller->controller_id = controller_id; | |
708 | } | |
709 | ||
710 | return NULL; | |
4cceacb9 JS |
711 | } |
712 | ||
f25d0cf3 | 713 | static void |
c2d936a4 | 714 | format_CONTROLLER(const struct ofpact_controller *a, struct ds *s) |
f25d0cf3 | 715 | { |
c2d936a4 BP |
716 | if (a->reason == OFPR_ACTION && a->controller_id == 0) { |
717 | ds_put_format(s, "CONTROLLER:%"PRIu16, a->max_len); | |
718 | } else { | |
719 | enum ofp_packet_in_reason reason = a->reason; | |
f25d0cf3 | 720 | |
c2d936a4 BP |
721 | ds_put_cstr(s, "controller("); |
722 | if (reason != OFPR_ACTION) { | |
723 | char reasonbuf[OFPUTIL_PACKET_IN_REASON_BUFSIZE]; | |
724 | ||
725 | ds_put_format(s, "reason=%s,", | |
726 | ofputil_packet_in_reason_to_string( | |
727 | reason, reasonbuf, sizeof reasonbuf)); | |
728 | } | |
729 | if (a->max_len != UINT16_MAX) { | |
730 | ds_put_format(s, "max_len=%"PRIu16",", a->max_len); | |
731 | } | |
732 | if (a->controller_id != 0) { | |
733 | ds_put_format(s, "id=%"PRIu16",", a->controller_id); | |
734 | } | |
735 | ds_chomp(s, ','); | |
736 | ds_put_char(s, ')'); | |
737 | } | |
f25d0cf3 | 738 | } |
c2d936a4 BP |
739 | \f |
740 | /* Enqueue action. */ | |
741 | struct ofp10_action_enqueue { | |
742 | ovs_be16 type; /* OFPAT10_ENQUEUE. */ | |
743 | ovs_be16 len; /* Len is 16. */ | |
744 | ovs_be16 port; /* Port that queue belongs. Should | |
745 | refer to a valid physical port | |
746 | (i.e. < OFPP_MAX) or OFPP_IN_PORT. */ | |
747 | uint8_t pad[6]; /* Pad for 64-bit alignment. */ | |
748 | ovs_be32 queue_id; /* Where to enqueue the packets. */ | |
749 | }; | |
750 | OFP_ASSERT(sizeof(struct ofp10_action_enqueue) == 16); | |
f25d0cf3 | 751 | |
c2d967a5 | 752 | static enum ofperr |
c2d936a4 | 753 | decode_OFPAT_RAW10_ENQUEUE(const struct ofp10_action_enqueue *oae, |
f3cd3ac7 | 754 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 755 | struct ofpbuf *out) |
c2d967a5 | 756 | { |
c2d936a4 | 757 | struct ofpact_enqueue *enqueue; |
c2d967a5 | 758 | |
c2d936a4 BP |
759 | enqueue = ofpact_put_ENQUEUE(out); |
760 | enqueue->port = u16_to_ofp(ntohs(oae->port)); | |
761 | enqueue->queue = ntohl(oae->queue_id); | |
762 | if (ofp_to_u16(enqueue->port) >= ofp_to_u16(OFPP_MAX) | |
763 | && enqueue->port != OFPP_IN_PORT | |
764 | && enqueue->port != OFPP_LOCAL) { | |
765 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
766 | } | |
767 | return 0; | |
c2d967a5 MM |
768 | } |
769 | ||
c2d936a4 BP |
770 | static void |
771 | encode_ENQUEUE(const struct ofpact_enqueue *enqueue, | |
772 | enum ofp_version ofp_version, struct ofpbuf *out) | |
c2d967a5 | 773 | { |
c2d936a4 BP |
774 | if (ofp_version == OFP10_VERSION) { |
775 | struct ofp10_action_enqueue *oae; | |
c2d967a5 | 776 | |
c2d936a4 BP |
777 | oae = put_OFPAT10_ENQUEUE(out); |
778 | oae->port = htons(ofp_to_u16(enqueue->port)); | |
779 | oae->queue_id = htonl(enqueue->queue); | |
780 | } else { | |
781 | /* XXX */ | |
c2d967a5 | 782 | } |
c2d936a4 | 783 | } |
c2d967a5 | 784 | |
cab50449 | 785 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
786 | parse_ENQUEUE(char *arg, struct ofpbuf *ofpacts, |
787 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
788 | { | |
789 | char *sp = NULL; | |
790 | char *port = strtok_r(arg, ":q,", &sp); | |
791 | char *queue = strtok_r(NULL, "", &sp); | |
792 | struct ofpact_enqueue *enqueue; | |
c2d967a5 | 793 | |
c2d936a4 BP |
794 | if (port == NULL || queue == NULL) { |
795 | return xstrdup("\"enqueue\" syntax is \"enqueue:PORT:QUEUE\" or " | |
796 | "\"enqueue(PORT,QUEUE)\""); | |
c2d967a5 MM |
797 | } |
798 | ||
c2d936a4 BP |
799 | enqueue = ofpact_put_ENQUEUE(ofpacts); |
800 | if (!ofputil_port_from_string(port, &enqueue->port)) { | |
801 | return xasprintf("%s: enqueue to unknown port", port); | |
802 | } | |
803 | return str_to_u32(queue, &enqueue->queue); | |
c2d967a5 MM |
804 | } |
805 | ||
c2d936a4 BP |
806 | static void |
807 | format_ENQUEUE(const struct ofpact_enqueue *a, struct ds *s) | |
29089a54 | 808 | { |
c2d936a4 BP |
809 | ds_put_format(s, "enqueue:"); |
810 | ofputil_format_port(a->port, s); | |
811 | ds_put_format(s, ":%"PRIu32, a->queue); | |
812 | } | |
813 | \f | |
814 | /* Action structure for NXAST_OUTPUT_REG. | |
815 | * | |
816 | * Outputs to the OpenFlow port number written to src[ofs:ofs+nbits]. | |
817 | * | |
818 | * The format and semantics of 'src' and 'ofs_nbits' are similar to those for | |
819 | * the NXAST_REG_LOAD action. | |
820 | * | |
821 | * The acceptable nxm_header values for 'src' are the same as the acceptable | |
822 | * nxm_header values for the 'src' field of NXAST_REG_MOVE. | |
823 | * | |
824 | * The 'max_len' field indicates the number of bytes to send when the chosen | |
825 | * port is OFPP_CONTROLLER. Its semantics are equivalent to the 'max_len' | |
826 | * field of OFPAT_OUTPUT. | |
827 | * | |
828 | * The 'zero' field is required to be zeroed for forward compatibility. */ | |
829 | struct nx_action_output_reg { | |
830 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
831 | ovs_be16 len; /* 24. */ | |
832 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
833 | ovs_be16 subtype; /* NXAST_OUTPUT_REG. */ | |
29089a54 | 834 | |
c2d936a4 BP |
835 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ |
836 | ovs_be32 src; /* Source. */ | |
29089a54 | 837 | |
c2d936a4 | 838 | ovs_be16 max_len; /* Max length to send to controller. */ |
29089a54 | 839 | |
c2d936a4 BP |
840 | uint8_t zero[6]; /* Reserved, must be zero. */ |
841 | }; | |
842 | OFP_ASSERT(sizeof(struct nx_action_output_reg) == 24); | |
29089a54 | 843 | |
bad8a439 BP |
844 | /* Action structure for NXAST_OUTPUT_REG2. |
845 | * | |
846 | * Like the NXAST_OUTPUT_REG but organized so that there is room for a 64-bit | |
847 | * experimenter OXM as 'src'. | |
848 | */ | |
849 | struct nx_action_output_reg2 { | |
850 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
851 | ovs_be16 len; /* 24. */ | |
852 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
853 | ovs_be16 subtype; /* NXAST_OUTPUT_REG2. */ | |
854 | ||
855 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
856 | ovs_be16 max_len; /* Max length to send to controller. */ | |
857 | ||
858 | /* Followed by: | |
859 | * - 'src', as an OXM/NXM header (either 4 or 8 bytes). | |
860 | * - Enough 0-bytes to pad the action out to 24 bytes. */ | |
861 | uint8_t pad[10]; | |
862 | }; | |
863 | OFP_ASSERT(sizeof(struct nx_action_output_reg2) == 24); | |
864 | ||
a7a2d006 | 865 | static enum ofperr |
c2d936a4 | 866 | decode_NXAST_RAW_OUTPUT_REG(const struct nx_action_output_reg *naor, |
f3cd3ac7 | 867 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 868 | struct ofpbuf *out) |
a7a2d006 | 869 | { |
c2d936a4 | 870 | struct ofpact_output_reg *output_reg; |
a7a2d006 | 871 | |
c2d936a4 | 872 | if (!is_all_zeros(naor->zero, sizeof naor->zero)) { |
a7a2d006 JS |
873 | return OFPERR_OFPBAC_BAD_ARGUMENT; |
874 | } | |
a7a2d006 | 875 | |
c2d936a4 | 876 | output_reg = ofpact_put_OUTPUT_REG(out); |
bad8a439 | 877 | output_reg->ofpact.raw = NXAST_RAW_OUTPUT_REG; |
c2d936a4 BP |
878 | output_reg->src.field = mf_from_nxm_header(ntohl(naor->src)); |
879 | output_reg->src.ofs = nxm_decode_ofs(naor->ofs_nbits); | |
880 | output_reg->src.n_bits = nxm_decode_n_bits(naor->ofs_nbits); | |
881 | output_reg->max_len = ntohs(naor->max_len); | |
882 | ||
883 | return mf_check_src(&output_reg->src, NULL); | |
a7a2d006 JS |
884 | } |
885 | ||
bad8a439 BP |
886 | static enum ofperr |
887 | decode_NXAST_RAW_OUTPUT_REG2(const struct nx_action_output_reg2 *naor, | |
f3cd3ac7 JS |
888 | enum ofp_version ofp_version OVS_UNUSED, |
889 | struct ofpbuf *out) | |
bad8a439 BP |
890 | { |
891 | struct ofpact_output_reg *output_reg; | |
892 | enum ofperr error; | |
893 | struct ofpbuf b; | |
894 | ||
895 | output_reg = ofpact_put_OUTPUT_REG(out); | |
896 | output_reg->ofpact.raw = NXAST_RAW_OUTPUT_REG2; | |
897 | output_reg->src.ofs = nxm_decode_ofs(naor->ofs_nbits); | |
898 | output_reg->src.n_bits = nxm_decode_n_bits(naor->ofs_nbits); | |
899 | output_reg->max_len = ntohs(naor->max_len); | |
900 | ||
901 | ofpbuf_use_const(&b, naor, ntohs(naor->len)); | |
902 | ofpbuf_pull(&b, OBJECT_OFFSETOF(naor, pad)); | |
903 | error = nx_pull_header(&b, &output_reg->src.field, NULL); | |
904 | if (error) { | |
905 | return error; | |
906 | } | |
6fd6ed71 | 907 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
908 | return OFPERR_NXBRC_MUST_BE_ZERO; |
909 | } | |
910 | ||
911 | return mf_check_src(&output_reg->src, NULL); | |
912 | } | |
913 | ||
c2d936a4 BP |
914 | static void |
915 | encode_OUTPUT_REG(const struct ofpact_output_reg *output_reg, | |
916 | enum ofp_version ofp_version OVS_UNUSED, | |
917 | struct ofpbuf *out) | |
f25d0cf3 | 918 | { |
bad8a439 BP |
919 | /* If 'output_reg' came in as an NXAST_RAW_OUTPUT_REG2 action, or if it |
920 | * cannot be encoded in the older form, encode it as | |
921 | * NXAST_RAW_OUTPUT_REG2. */ | |
922 | if (output_reg->ofpact.raw == NXAST_RAW_OUTPUT_REG2 | |
923 | || !mf_nxm_header(output_reg->src.field->id)) { | |
924 | struct nx_action_output_reg2 *naor = put_NXAST_OUTPUT_REG2(out); | |
6fd6ed71 | 925 | size_t size = out->size; |
bad8a439 BP |
926 | |
927 | naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs, | |
928 | output_reg->src.n_bits); | |
929 | naor->max_len = htons(output_reg->max_len); | |
930 | ||
6fd6ed71 | 931 | out->size = size - sizeof naor->pad; |
bad8a439 | 932 | nx_put_header(out, output_reg->src.field->id, 0, false); |
6fd6ed71 | 933 | out->size = size; |
bad8a439 BP |
934 | } else { |
935 | struct nx_action_output_reg *naor = put_NXAST_OUTPUT_REG(out); | |
f25d0cf3 | 936 | |
bad8a439 BP |
937 | naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs, |
938 | output_reg->src.n_bits); | |
939 | naor->src = htonl(mf_nxm_header(output_reg->src.field->id)); | |
940 | naor->max_len = htons(output_reg->max_len); | |
941 | } | |
f25d0cf3 BP |
942 | } |
943 | ||
cab50449 | 944 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
945 | parse_OUTPUT_REG(const char *arg, struct ofpbuf *ofpacts, |
946 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
f25d0cf3 | 947 | { |
c2d936a4 | 948 | return parse_OUTPUT(arg, ofpacts, usable_protocols); |
f25d0cf3 BP |
949 | } |
950 | ||
c2d936a4 BP |
951 | static void |
952 | format_OUTPUT_REG(const struct ofpact_output_reg *a, struct ds *s) | |
f25d0cf3 | 953 | { |
c2d936a4 BP |
954 | ds_put_cstr(s, "output:"); |
955 | mf_format_subfield(&a->src, s); | |
956 | } | |
957 | \f | |
958 | /* Action structure for NXAST_BUNDLE and NXAST_BUNDLE_LOAD. | |
959 | * | |
960 | * The bundle actions choose a slave from a supplied list of options. | |
961 | * NXAST_BUNDLE outputs to its selection. NXAST_BUNDLE_LOAD writes its | |
962 | * selection to a register. | |
963 | * | |
964 | * The list of possible slaves follows the nx_action_bundle structure. The size | |
965 | * of each slave is governed by its type as indicated by the 'slave_type' | |
966 | * parameter. The list of slaves should be padded at its end with zeros to make | |
967 | * the total length of the action a multiple of 8. | |
968 | * | |
969 | * Switches infer from the 'slave_type' parameter the size of each slave. All | |
970 | * implementations must support the NXM_OF_IN_PORT 'slave_type' which indicates | |
971 | * that the slaves are OpenFlow port numbers with NXM_LENGTH(NXM_OF_IN_PORT) == | |
972 | * 2 byte width. Switches should reject actions which indicate unknown or | |
973 | * unsupported slave types. | |
974 | * | |
975 | * Switches use a strategy dictated by the 'algorithm' parameter to choose a | |
976 | * slave. If the switch does not support the specified 'algorithm' parameter, | |
977 | * it should reject the action. | |
978 | * | |
979 | * Several algorithms take into account liveness when selecting slaves. The | |
980 | * liveness of a slave is implementation defined (with one exception), but will | |
981 | * generally take into account things like its carrier status and the results | |
982 | * of any link monitoring protocols which happen to be running on it. In order | |
983 | * to give controllers a place-holder value, the OFPP_NONE port is always | |
984 | * considered live. | |
985 | * | |
986 | * Some slave selection strategies require the use of a hash function, in which | |
987 | * case the 'fields' and 'basis' parameters should be populated. The 'fields' | |
988 | * parameter (one of NX_HASH_FIELDS_*) designates which parts of the flow to | |
989 | * hash. Refer to the definition of "enum nx_hash_fields" for details. The | |
990 | * 'basis' parameter is used as a universal hash parameter. Different values | |
991 | * of 'basis' yield different hash results. | |
992 | * | |
993 | * The 'zero' parameter at the end of the action structure is reserved for | |
994 | * future use. Switches are required to reject actions which have nonzero | |
995 | * bytes in the 'zero' field. | |
996 | * | |
997 | * NXAST_BUNDLE actions should have 'ofs_nbits' and 'dst' zeroed. Switches | |
998 | * should reject actions which have nonzero bytes in either of these fields. | |
999 | * | |
1000 | * NXAST_BUNDLE_LOAD stores the OpenFlow port number of the selected slave in | |
1001 | * dst[ofs:ofs+n_bits]. The format and semantics of 'dst' and 'ofs_nbits' are | |
1002 | * similar to those for the NXAST_REG_LOAD action. */ | |
1003 | struct nx_action_bundle { | |
1004 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
1005 | ovs_be16 len; /* Length including slaves. */ | |
1006 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
1007 | ovs_be16 subtype; /* NXAST_BUNDLE or NXAST_BUNDLE_LOAD. */ | |
f25d0cf3 | 1008 | |
c2d936a4 BP |
1009 | /* Slave choice algorithm to apply to hash value. */ |
1010 | ovs_be16 algorithm; /* One of NX_BD_ALG_*. */ | |
4cceacb9 | 1011 | |
c2d936a4 BP |
1012 | /* What fields to hash and how. */ |
1013 | ovs_be16 fields; /* One of NX_HASH_FIELDS_*. */ | |
1014 | ovs_be16 basis; /* Universal hash parameter. */ | |
f25d0cf3 | 1015 | |
c2d936a4 BP |
1016 | ovs_be32 slave_type; /* NXM_OF_IN_PORT. */ |
1017 | ovs_be16 n_slaves; /* Number of slaves. */ | |
f25d0cf3 | 1018 | |
c2d936a4 BP |
1019 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ |
1020 | ovs_be32 dst; /* Destination. */ | |
f25d0cf3 | 1021 | |
c2d936a4 BP |
1022 | uint8_t zero[4]; /* Reserved. Must be zero. */ |
1023 | }; | |
1024 | OFP_ASSERT(sizeof(struct nx_action_bundle) == 32); | |
f25d0cf3 | 1025 | |
c2d936a4 BP |
1026 | static enum ofperr |
1027 | decode_bundle(bool load, const struct nx_action_bundle *nab, | |
1028 | struct ofpbuf *ofpacts) | |
1029 | { | |
1030 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1031 | struct ofpact_bundle *bundle; | |
1032 | uint32_t slave_type; | |
1033 | size_t slaves_size, i; | |
1034 | enum ofperr error; | |
bd85dac1 | 1035 | |
c2d936a4 BP |
1036 | bundle = ofpact_put_BUNDLE(ofpacts); |
1037 | ||
1038 | bundle->n_slaves = ntohs(nab->n_slaves); | |
1039 | bundle->basis = ntohs(nab->basis); | |
1040 | bundle->fields = ntohs(nab->fields); | |
1041 | bundle->algorithm = ntohs(nab->algorithm); | |
1042 | slave_type = ntohl(nab->slave_type); | |
1043 | slaves_size = ntohs(nab->len) - sizeof *nab; | |
1044 | ||
1045 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1046 | if (!flow_hash_fields_valid(bundle->fields)) { | |
1047 | VLOG_WARN_RL(&rl, "unsupported fields %d", (int) bundle->fields); | |
1048 | } else if (bundle->n_slaves > BUNDLE_MAX_SLAVES) { | |
1049 | VLOG_WARN_RL(&rl, "too many slaves"); | |
1050 | } else if (bundle->algorithm != NX_BD_ALG_HRW | |
1051 | && bundle->algorithm != NX_BD_ALG_ACTIVE_BACKUP) { | |
1052 | VLOG_WARN_RL(&rl, "unsupported algorithm %d", (int) bundle->algorithm); | |
508a9338 | 1053 | } else if (slave_type != mf_nxm_header(MFF_IN_PORT)) { |
c2d936a4 BP |
1054 | VLOG_WARN_RL(&rl, "unsupported slave type %"PRIu16, slave_type); |
1055 | } else { | |
1056 | error = 0; | |
1057 | } | |
bd85dac1 | 1058 | |
c2d936a4 BP |
1059 | if (!is_all_zeros(nab->zero, sizeof nab->zero)) { |
1060 | VLOG_WARN_RL(&rl, "reserved field is nonzero"); | |
1061 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1062 | } | |
f25d0cf3 | 1063 | |
c2d936a4 BP |
1064 | if (load) { |
1065 | bundle->dst.field = mf_from_nxm_header(ntohl(nab->dst)); | |
1066 | bundle->dst.ofs = nxm_decode_ofs(nab->ofs_nbits); | |
1067 | bundle->dst.n_bits = nxm_decode_n_bits(nab->ofs_nbits); | |
f25d0cf3 | 1068 | |
c2d936a4 BP |
1069 | if (bundle->dst.n_bits < 16) { |
1070 | VLOG_WARN_RL(&rl, "bundle_load action requires at least 16 bit " | |
1071 | "destination."); | |
1072 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1073 | } | |
1074 | } else { | |
1075 | if (nab->ofs_nbits || nab->dst) { | |
1076 | VLOG_WARN_RL(&rl, "bundle action has nonzero reserved fields"); | |
1077 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
1078 | } | |
1079 | } | |
f25d0cf3 | 1080 | |
c2d936a4 BP |
1081 | if (slaves_size < bundle->n_slaves * sizeof(ovs_be16)) { |
1082 | VLOG_WARN_RL(&rl, "Nicira action %s only has %"PRIuSIZE" bytes " | |
1083 | "allocated for slaves. %"PRIuSIZE" bytes are required " | |
1084 | "for %"PRIu16" slaves.", | |
1085 | load ? "bundle_load" : "bundle", slaves_size, | |
1086 | bundle->n_slaves * sizeof(ovs_be16), bundle->n_slaves); | |
1087 | error = OFPERR_OFPBAC_BAD_LEN; | |
1088 | } | |
f25d0cf3 | 1089 | |
c2d936a4 BP |
1090 | for (i = 0; i < bundle->n_slaves; i++) { |
1091 | uint16_t ofp_port = ntohs(((ovs_be16 *)(nab + 1))[i]); | |
1092 | ofpbuf_put(ofpacts, &ofp_port, sizeof ofp_port); | |
1093 | } | |
f25d0cf3 | 1094 | |
6fd6ed71 | 1095 | bundle = ofpacts->header; |
34abaa3d | 1096 | ofpact_finish(ofpacts, &bundle->ofpact); |
f25d0cf3 | 1097 | |
c2d936a4 BP |
1098 | if (!error) { |
1099 | error = bundle_check(bundle, OFPP_MAX, NULL); | |
1100 | } | |
1101 | return error; | |
1102 | } | |
f25d0cf3 | 1103 | |
c2d936a4 | 1104 | static enum ofperr |
f3cd3ac7 JS |
1105 | decode_NXAST_RAW_BUNDLE(const struct nx_action_bundle *nab, |
1106 | enum ofp_version ofp_version OVS_UNUSED, | |
1107 | struct ofpbuf *out) | |
c2d936a4 BP |
1108 | { |
1109 | return decode_bundle(false, nab, out); | |
1110 | } | |
f25d0cf3 | 1111 | |
c2d936a4 BP |
1112 | static enum ofperr |
1113 | decode_NXAST_RAW_BUNDLE_LOAD(const struct nx_action_bundle *nab, | |
f3cd3ac7 | 1114 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
1115 | struct ofpbuf *out) |
1116 | { | |
1117 | return decode_bundle(true, nab, out); | |
1118 | } | |
c2d967a5 | 1119 | |
c2d936a4 BP |
1120 | static void |
1121 | encode_BUNDLE(const struct ofpact_bundle *bundle, | |
1122 | enum ofp_version ofp_version OVS_UNUSED, | |
1123 | struct ofpbuf *out) | |
1124 | { | |
1125 | int slaves_len = ROUND_UP(2 * bundle->n_slaves, OFP_ACTION_ALIGN); | |
1126 | struct nx_action_bundle *nab; | |
1127 | ovs_be16 *slaves; | |
1128 | size_t i; | |
f25d0cf3 | 1129 | |
c2d936a4 BP |
1130 | nab = (bundle->dst.field |
1131 | ? put_NXAST_BUNDLE_LOAD(out) | |
1132 | : put_NXAST_BUNDLE(out)); | |
1133 | nab->len = htons(ntohs(nab->len) + slaves_len); | |
1134 | nab->algorithm = htons(bundle->algorithm); | |
1135 | nab->fields = htons(bundle->fields); | |
1136 | nab->basis = htons(bundle->basis); | |
508a9338 | 1137 | nab->slave_type = htonl(mf_nxm_header(MFF_IN_PORT)); |
c2d936a4 BP |
1138 | nab->n_slaves = htons(bundle->n_slaves); |
1139 | if (bundle->dst.field) { | |
1140 | nab->ofs_nbits = nxm_encode_ofs_nbits(bundle->dst.ofs, | |
1141 | bundle->dst.n_bits); | |
508a9338 | 1142 | nab->dst = htonl(mf_nxm_header(bundle->dst.field->id)); |
c2d936a4 | 1143 | } |
f25d0cf3 | 1144 | |
c2d936a4 BP |
1145 | slaves = ofpbuf_put_zeros(out, slaves_len); |
1146 | for (i = 0; i < bundle->n_slaves; i++) { | |
1147 | slaves[i] = htons(ofp_to_u16(bundle->slaves[i])); | |
1148 | } | |
1149 | } | |
b02475c5 | 1150 | |
cab50449 | 1151 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1152 | parse_BUNDLE(const char *arg, struct ofpbuf *ofpacts, |
1153 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1154 | { | |
1155 | return bundle_parse(arg, ofpacts); | |
1156 | } | |
b02475c5 | 1157 | |
cab50449 | 1158 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1159 | parse_bundle_load(const char *arg, struct ofpbuf *ofpacts) |
1160 | { | |
1161 | return bundle_parse_load(arg, ofpacts); | |
1162 | } | |
097d4939 | 1163 | |
c2d936a4 BP |
1164 | static void |
1165 | format_BUNDLE(const struct ofpact_bundle *a, struct ds *s) | |
1166 | { | |
1167 | bundle_format(a, s); | |
1168 | } | |
1169 | \f | |
1170 | /* Set VLAN actions. */ | |
097d4939 | 1171 | |
c2d936a4 BP |
1172 | static enum ofperr |
1173 | decode_set_vlan_vid(uint16_t vid, bool push_vlan_if_needed, struct ofpbuf *out) | |
1174 | { | |
1175 | if (vid & ~0xfff) { | |
1176 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1177 | } else { | |
1178 | struct ofpact_vlan_vid *vlan_vid = ofpact_put_SET_VLAN_VID(out); | |
1179 | vlan_vid->vlan_vid = vid; | |
1180 | vlan_vid->push_vlan_if_needed = push_vlan_if_needed; | |
1181 | return 0; | |
1182 | } | |
1183 | } | |
0f3f3c3d | 1184 | |
c2d936a4 | 1185 | static enum ofperr |
f3cd3ac7 JS |
1186 | decode_OFPAT_RAW10_SET_VLAN_VID(uint16_t vid, |
1187 | enum ofp_version ofp_version OVS_UNUSED, | |
1188 | struct ofpbuf *out) | |
c2d936a4 BP |
1189 | { |
1190 | return decode_set_vlan_vid(vid, true, out); | |
1191 | } | |
b676167a | 1192 | |
c2d936a4 | 1193 | static enum ofperr |
f3cd3ac7 JS |
1194 | decode_OFPAT_RAW11_SET_VLAN_VID(uint16_t vid, |
1195 | enum ofp_version ofp_version OVS_UNUSED, | |
1196 | struct ofpbuf *out) | |
c2d936a4 BP |
1197 | { |
1198 | return decode_set_vlan_vid(vid, false, out); | |
1199 | } | |
29089a54 | 1200 | |
c2d936a4 BP |
1201 | static void |
1202 | encode_SET_VLAN_VID(const struct ofpact_vlan_vid *vlan_vid, | |
1203 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1204 | { | |
1205 | uint16_t vid = vlan_vid->vlan_vid; | |
1206 | ||
1207 | /* Push a VLAN tag, if none is present and this form of the action calls | |
1208 | * for such a feature. */ | |
1209 | if (ofp_version > OFP10_VERSION | |
1210 | && vlan_vid->push_vlan_if_needed | |
1211 | && !vlan_vid->flow_has_vlan) { | |
1212 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
f25d0cf3 BP |
1213 | } |
1214 | ||
c2d936a4 BP |
1215 | if (ofp_version == OFP10_VERSION) { |
1216 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
1217 | } else if (ofp_version == OFP11_VERSION) { | |
1218 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
1219 | } else { | |
1220 | ofpact_put_set_field(out, ofp_version, | |
1221 | MFF_VLAN_VID, vid | OFPVID12_PRESENT); | |
1222 | } | |
f25d0cf3 BP |
1223 | } |
1224 | ||
cab50449 | 1225 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 1226 | parse_set_vlan_vid(char *arg, struct ofpbuf *ofpacts, bool push_vlan_if_needed) |
d01c980f | 1227 | { |
ca287d20 | 1228 | struct ofpact_vlan_vid *vlan_vid; |
c2d936a4 BP |
1229 | uint16_t vid; |
1230 | char *error; | |
d01c980f | 1231 | |
c2d936a4 | 1232 | error = str_to_u16(arg, "VLAN VID", &vid); |
d01c980f BP |
1233 | if (error) { |
1234 | return error; | |
1235 | } | |
1236 | ||
c2d936a4 BP |
1237 | if (vid & ~VLAN_VID_MASK) { |
1238 | return xasprintf("%s: not a valid VLAN VID", arg); | |
d01c980f | 1239 | } |
c2d936a4 BP |
1240 | vlan_vid = ofpact_put_SET_VLAN_VID(ofpacts); |
1241 | vlan_vid->vlan_vid = vid; | |
1242 | vlan_vid->push_vlan_if_needed = push_vlan_if_needed; | |
1243 | return NULL; | |
1244 | } | |
d01c980f | 1245 | |
cab50449 | 1246 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1247 | parse_SET_VLAN_VID(char *arg, struct ofpbuf *ofpacts, |
1248 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1249 | { | |
1250 | return parse_set_vlan_vid(arg, ofpacts, false); | |
d01c980f BP |
1251 | } |
1252 | ||
c2d936a4 BP |
1253 | static void |
1254 | format_SET_VLAN_VID(const struct ofpact_vlan_vid *a, struct ds *s) | |
1255 | { | |
1256 | ds_put_format(s, "%s:%"PRIu16, | |
1257 | a->push_vlan_if_needed ? "mod_vlan_vid" : "set_vlan_vid", | |
1258 | a->vlan_vid); | |
1259 | } | |
1260 | \f | |
1261 | /* Set PCP actions. */ | |
e3f8f887 | 1262 | |
c2d936a4 BP |
1263 | static enum ofperr |
1264 | decode_set_vlan_pcp(uint8_t pcp, bool push_vlan_if_needed, struct ofpbuf *out) | |
f25d0cf3 | 1265 | { |
c2d936a4 BP |
1266 | if (pcp & ~7) { |
1267 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1268 | } else { | |
1269 | struct ofpact_vlan_pcp *vlan_pcp = ofpact_put_SET_VLAN_PCP(out); | |
1270 | vlan_pcp->vlan_pcp = pcp; | |
1271 | vlan_pcp->push_vlan_if_needed = push_vlan_if_needed; | |
1272 | return 0; | |
1273 | } | |
f25d0cf3 BP |
1274 | } |
1275 | ||
c2d936a4 | 1276 | static enum ofperr |
f3cd3ac7 JS |
1277 | decode_OFPAT_RAW10_SET_VLAN_PCP(uint8_t pcp, |
1278 | enum ofp_version ofp_version OVS_UNUSED, | |
1279 | struct ofpbuf *out) | |
f25d0cf3 | 1280 | { |
c2d936a4 | 1281 | return decode_set_vlan_pcp(pcp, true, out); |
f25d0cf3 BP |
1282 | } |
1283 | ||
c2d936a4 | 1284 | static enum ofperr |
f3cd3ac7 JS |
1285 | decode_OFPAT_RAW11_SET_VLAN_PCP(uint8_t pcp, |
1286 | enum ofp_version ofp_version OVS_UNUSED, | |
1287 | struct ofpbuf *out) | |
c2d936a4 BP |
1288 | { |
1289 | return decode_set_vlan_pcp(pcp, false, out); | |
1290 | } | |
f25d0cf3 | 1291 | |
699dddf1 | 1292 | static void |
c2d936a4 BP |
1293 | encode_SET_VLAN_PCP(const struct ofpact_vlan_pcp *vlan_pcp, |
1294 | enum ofp_version ofp_version, struct ofpbuf *out) | |
699dddf1 | 1295 | { |
c2d936a4 BP |
1296 | uint8_t pcp = vlan_pcp->vlan_pcp; |
1297 | ||
1298 | /* Push a VLAN tag, if none is present and this form of the action calls | |
1299 | * for such a feature. */ | |
1300 | if (ofp_version > OFP10_VERSION | |
1301 | && vlan_pcp->push_vlan_if_needed | |
1302 | && !vlan_pcp->flow_has_vlan) { | |
1303 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
1304 | } | |
699dddf1 | 1305 | |
c2d936a4 BP |
1306 | if (ofp_version == OFP10_VERSION) { |
1307 | put_OFPAT10_SET_VLAN_PCP(out, pcp); | |
1308 | } else if (ofp_version == OFP11_VERSION) { | |
1309 | put_OFPAT11_SET_VLAN_PCP(out, pcp); | |
1310 | } else { | |
1311 | ofpact_put_set_field(out, ofp_version, MFF_VLAN_PCP, pcp); | |
699dddf1 BP |
1312 | } |
1313 | } | |
1314 | ||
cab50449 | 1315 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 1316 | parse_set_vlan_pcp(char *arg, struct ofpbuf *ofpacts, bool push_vlan_if_needed) |
f25d0cf3 | 1317 | { |
c2d936a4 BP |
1318 | struct ofpact_vlan_pcp *vlan_pcp; |
1319 | uint8_t pcp; | |
1320 | char *error; | |
e3f8f887 | 1321 | |
c2d936a4 BP |
1322 | error = str_to_u8(arg, "VLAN PCP", &pcp); |
1323 | if (error) { | |
699dddf1 | 1324 | return error; |
f25d0cf3 BP |
1325 | } |
1326 | ||
c2d936a4 BP |
1327 | if (pcp & ~7) { |
1328 | return xasprintf("%s: not a valid VLAN PCP", arg); | |
1329 | } | |
1330 | vlan_pcp = ofpact_put_SET_VLAN_PCP(ofpacts); | |
1331 | vlan_pcp->vlan_pcp = pcp; | |
1332 | vlan_pcp->push_vlan_if_needed = push_vlan_if_needed; | |
1333 | return NULL; | |
1334 | } | |
1335 | ||
cab50449 | 1336 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1337 | parse_SET_VLAN_PCP(char *arg, struct ofpbuf *ofpacts, |
1338 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1339 | { | |
1340 | return parse_set_vlan_pcp(arg, ofpacts, false); | |
1341 | } | |
1342 | ||
1343 | static void | |
1344 | format_SET_VLAN_PCP(const struct ofpact_vlan_pcp *a, struct ds *s) | |
1345 | { | |
1346 | ds_put_format(s, "%s:%"PRIu8, | |
1347 | a->push_vlan_if_needed ? "mod_vlan_pcp" : "set_vlan_pcp", | |
1348 | a->vlan_pcp); | |
1349 | } | |
1350 | \f | |
1351 | /* Strip VLAN actions. */ | |
1352 | ||
1353 | static enum ofperr | |
1354 | decode_OFPAT_RAW10_STRIP_VLAN(struct ofpbuf *out) | |
1355 | { | |
1356 | ofpact_put_STRIP_VLAN(out)->ofpact.raw = OFPAT_RAW10_STRIP_VLAN; | |
f25d0cf3 BP |
1357 | return 0; |
1358 | } | |
1359 | ||
8f2cded4 | 1360 | static enum ofperr |
c2d936a4 | 1361 | decode_OFPAT_RAW11_POP_VLAN(struct ofpbuf *out) |
8f2cded4 | 1362 | { |
c2d936a4 BP |
1363 | ofpact_put_STRIP_VLAN(out)->ofpact.raw = OFPAT_RAW11_POP_VLAN; |
1364 | return 0; | |
1365 | } | |
f25d0cf3 | 1366 | |
c2d936a4 BP |
1367 | static void |
1368 | encode_STRIP_VLAN(const struct ofpact_null *null OVS_UNUSED, | |
1369 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1370 | { | |
1371 | if (ofp_version == OFP10_VERSION) { | |
1372 | put_OFPAT10_STRIP_VLAN(out); | |
1373 | } else { | |
1374 | put_OFPAT11_POP_VLAN(out); | |
1375 | } | |
1376 | } | |
f25d0cf3 | 1377 | |
cab50449 | 1378 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1379 | parse_STRIP_VLAN(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
1380 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1381 | { | |
1382 | ofpact_put_STRIP_VLAN(ofpacts)->ofpact.raw = OFPAT_RAW10_STRIP_VLAN; | |
1383 | return NULL; | |
1384 | } | |
1385 | ||
cab50449 | 1386 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1387 | parse_pop_vlan(struct ofpbuf *ofpacts) |
1388 | { | |
1389 | ofpact_put_STRIP_VLAN(ofpacts)->ofpact.raw = OFPAT_RAW11_POP_VLAN; | |
1390 | return NULL; | |
1391 | } | |
1392 | ||
1393 | static void | |
1394 | format_STRIP_VLAN(const struct ofpact_null *a, struct ds *s) | |
1395 | { | |
1396 | ds_put_cstr(s, (a->ofpact.raw == OFPAT_RAW11_POP_VLAN | |
1397 | ? "pop_vlan" | |
1398 | : "strip_vlan")); | |
1399 | } | |
1400 | \f | |
1401 | /* Push VLAN action. */ | |
1402 | ||
1403 | static enum ofperr | |
f3cd3ac7 JS |
1404 | decode_OFPAT_RAW11_PUSH_VLAN(ovs_be16 eth_type, |
1405 | enum ofp_version ofp_version OVS_UNUSED, | |
1406 | struct ofpbuf *out) | |
c2d936a4 BP |
1407 | { |
1408 | if (eth_type != htons(ETH_TYPE_VLAN_8021Q)) { | |
1409 | /* XXX 802.1AD(QinQ) isn't supported at the moment */ | |
1410 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
f25d0cf3 | 1411 | } |
c2d936a4 BP |
1412 | ofpact_put_PUSH_VLAN(out); |
1413 | return 0; | |
1414 | } | |
f25d0cf3 | 1415 | |
c2d936a4 BP |
1416 | static void |
1417 | encode_PUSH_VLAN(const struct ofpact_null *null OVS_UNUSED, | |
1418 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1419 | { | |
1420 | if (ofp_version == OFP10_VERSION) { | |
1421 | /* PUSH is a side effect of a SET_VLAN_VID/PCP, which should | |
1422 | * follow this action. */ | |
1423 | } else { | |
1424 | /* XXX ETH_TYPE_VLAN_8021AD case */ | |
1425 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
f25d0cf3 | 1426 | } |
c2d936a4 | 1427 | } |
f25d0cf3 | 1428 | |
cab50449 | 1429 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1430 | parse_PUSH_VLAN(char *arg, struct ofpbuf *ofpacts, |
1431 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1432 | { | |
1433 | uint16_t ethertype; | |
1434 | char *error; | |
1435 | ||
1436 | *usable_protocols &= OFPUTIL_P_OF11_UP; | |
1437 | error = str_to_u16(arg, "ethertype", ðertype); | |
4cceacb9 | 1438 | if (error) { |
4cceacb9 JS |
1439 | return error; |
1440 | } | |
1441 | ||
c2d936a4 BP |
1442 | if (ethertype != ETH_TYPE_VLAN_8021Q) { |
1443 | /* XXX ETH_TYPE_VLAN_8021AD case isn't supported */ | |
1444 | return xasprintf("%s: not a valid VLAN ethertype", arg); | |
f25d0cf3 | 1445 | } |
c2d936a4 BP |
1446 | |
1447 | ofpact_put_PUSH_VLAN(ofpacts); | |
1448 | return NULL; | |
d01c980f BP |
1449 | } |
1450 | ||
c2d936a4 BP |
1451 | static void |
1452 | format_PUSH_VLAN(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
8f2cded4 | 1453 | { |
c2d936a4 BP |
1454 | /* XXX 802.1AD case*/ |
1455 | ds_put_format(s, "push_vlan:%#"PRIx16, ETH_TYPE_VLAN_8021Q); | |
8f2cded4 | 1456 | } |
d01c980f | 1457 | \f |
c2d936a4 BP |
1458 | /* Action structure for OFPAT10_SET_DL_SRC/DST and OFPAT11_SET_DL_SRC/DST. */ |
1459 | struct ofp_action_dl_addr { | |
1460 | ovs_be16 type; /* Type. */ | |
1461 | ovs_be16 len; /* Length is 16. */ | |
74ff3298 | 1462 | struct eth_addr dl_addr; /* Ethernet address. */ |
c2d936a4 BP |
1463 | uint8_t pad[6]; |
1464 | }; | |
1465 | OFP_ASSERT(sizeof(struct ofp_action_dl_addr) == 16); | |
d01c980f | 1466 | |
d01c980f | 1467 | static enum ofperr |
c2d936a4 | 1468 | decode_OFPAT_RAW_SET_DL_SRC(const struct ofp_action_dl_addr *a, |
f3cd3ac7 | 1469 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 1470 | struct ofpbuf *out) |
d01c980f | 1471 | { |
74ff3298 | 1472 | ofpact_put_SET_ETH_SRC(out)->mac = a->dl_addr; |
c2d936a4 BP |
1473 | return 0; |
1474 | } | |
3ddcaf2d | 1475 | |
c2d936a4 BP |
1476 | static enum ofperr |
1477 | decode_OFPAT_RAW_SET_DL_DST(const struct ofp_action_dl_addr *a, | |
f3cd3ac7 | 1478 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
1479 | struct ofpbuf *out) |
1480 | { | |
74ff3298 | 1481 | ofpact_put_SET_ETH_DST(out)->mac = a->dl_addr; |
c2d936a4 BP |
1482 | return 0; |
1483 | } | |
d01c980f | 1484 | |
c2d936a4 BP |
1485 | static void |
1486 | encode_SET_ETH_addr(const struct ofpact_mac *mac, enum ofp_version ofp_version, | |
1487 | enum ofp_raw_action_type raw, enum mf_field_id field, | |
1488 | struct ofpbuf *out) | |
1489 | { | |
c2d936a4 BP |
1490 | if (ofp_version < OFP12_VERSION) { |
1491 | struct ofp_action_dl_addr *oada; | |
1492 | ||
1493 | oada = ofpact_put_raw(out, ofp_version, raw, 0); | |
74ff3298 | 1494 | oada->dl_addr = mac->mac; |
c2d936a4 BP |
1495 | } else { |
1496 | ofpact_put_set_field(out, ofp_version, field, | |
74ff3298 | 1497 | eth_addr_to_uint64(mac->mac)); |
d01c980f BP |
1498 | } |
1499 | } | |
1500 | ||
c2d936a4 BP |
1501 | static void |
1502 | encode_SET_ETH_SRC(const struct ofpact_mac *mac, enum ofp_version ofp_version, | |
1503 | struct ofpbuf *out) | |
b2dd70be | 1504 | { |
c2d936a4 BP |
1505 | encode_SET_ETH_addr(mac, ofp_version, OFPAT_RAW_SET_DL_SRC, MFF_ETH_SRC, |
1506 | out); | |
b2dd70be | 1507 | |
c2d936a4 | 1508 | } |
b2dd70be | 1509 | |
c2d936a4 BP |
1510 | static void |
1511 | encode_SET_ETH_DST(const struct ofpact_mac *mac, | |
1512 | enum ofp_version ofp_version, | |
1513 | struct ofpbuf *out) | |
1514 | { | |
1515 | encode_SET_ETH_addr(mac, ofp_version, OFPAT_RAW_SET_DL_DST, MFF_ETH_DST, | |
1516 | out); | |
b2dd70be | 1517 | |
c2d936a4 | 1518 | } |
b2dd70be | 1519 | |
cab50449 | 1520 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1521 | parse_SET_ETH_SRC(char *arg, struct ofpbuf *ofpacts, |
1522 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1523 | { | |
74ff3298 | 1524 | return str_to_mac(arg, &ofpact_put_SET_ETH_SRC(ofpacts)->mac); |
c2d936a4 BP |
1525 | } |
1526 | ||
cab50449 | 1527 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1528 | parse_SET_ETH_DST(char *arg, struct ofpbuf *ofpacts, |
1529 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1530 | { | |
74ff3298 | 1531 | return str_to_mac(arg, &ofpact_put_SET_ETH_DST(ofpacts)->mac); |
b2dd70be JR |
1532 | } |
1533 | ||
1534 | static void | |
c2d936a4 | 1535 | format_SET_ETH_SRC(const struct ofpact_mac *a, struct ds *s) |
b2dd70be | 1536 | { |
c2d936a4 BP |
1537 | ds_put_format(s, "mod_dl_src:"ETH_ADDR_FMT, ETH_ADDR_ARGS(a->mac)); |
1538 | } | |
b2dd70be | 1539 | |
c2d936a4 BP |
1540 | static void |
1541 | format_SET_ETH_DST(const struct ofpact_mac *a, struct ds *s) | |
1542 | { | |
1543 | ds_put_format(s, "mod_dl_dst:"ETH_ADDR_FMT, ETH_ADDR_ARGS(a->mac)); | |
1544 | } | |
1545 | \f | |
1546 | /* Set IPv4 address actions. */ | |
b2dd70be | 1547 | |
c2d936a4 | 1548 | static enum ofperr |
f3cd3ac7 JS |
1549 | decode_OFPAT_RAW_SET_NW_SRC(ovs_be32 ipv4, |
1550 | enum ofp_version ofp_version OVS_UNUSED, | |
1551 | struct ofpbuf *out) | |
c2d936a4 BP |
1552 | { |
1553 | ofpact_put_SET_IPV4_SRC(out)->ipv4 = ipv4; | |
1554 | return 0; | |
b2dd70be JR |
1555 | } |
1556 | ||
c2d936a4 | 1557 | static enum ofperr |
f3cd3ac7 JS |
1558 | decode_OFPAT_RAW_SET_NW_DST(ovs_be32 ipv4, |
1559 | enum ofp_version ofp_version OVS_UNUSED, | |
1560 | struct ofpbuf *out) | |
b2dd70be | 1561 | { |
c2d936a4 BP |
1562 | ofpact_put_SET_IPV4_DST(out)->ipv4 = ipv4; |
1563 | return 0; | |
1564 | } | |
b2dd70be | 1565 | |
c2d936a4 BP |
1566 | static void |
1567 | encode_SET_IPV4_addr(const struct ofpact_ipv4 *ipv4, | |
1568 | enum ofp_version ofp_version, | |
1569 | enum ofp_raw_action_type raw, enum mf_field_id field, | |
1570 | struct ofpbuf *out) | |
1571 | { | |
1572 | ovs_be32 addr = ipv4->ipv4; | |
1573 | if (ofp_version < OFP12_VERSION) { | |
1574 | ofpact_put_raw(out, ofp_version, raw, ntohl(addr)); | |
b2dd70be | 1575 | } else { |
c2d936a4 | 1576 | ofpact_put_set_field(out, ofp_version, field, ntohl(addr)); |
b2dd70be JR |
1577 | } |
1578 | } | |
1579 | ||
a6fd70bb | 1580 | static void |
c2d936a4 BP |
1581 | encode_SET_IPV4_SRC(const struct ofpact_ipv4 *ipv4, |
1582 | enum ofp_version ofp_version, struct ofpbuf *out) | |
a6fd70bb | 1583 | { |
c2d936a4 BP |
1584 | encode_SET_IPV4_addr(ipv4, ofp_version, OFPAT_RAW_SET_NW_SRC, MFF_IPV4_SRC, |
1585 | out); | |
1586 | } | |
a6fd70bb | 1587 | |
c2d936a4 BP |
1588 | static void |
1589 | encode_SET_IPV4_DST(const struct ofpact_ipv4 *ipv4, | |
1590 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1591 | { | |
1592 | encode_SET_IPV4_addr(ipv4, ofp_version, OFPAT_RAW_SET_NW_DST, MFF_IPV4_DST, | |
1593 | out); | |
1594 | } | |
a6fd70bb | 1595 | |
cab50449 | 1596 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1597 | parse_SET_IPV4_SRC(char *arg, struct ofpbuf *ofpacts, |
1598 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1599 | { | |
1600 | return str_to_ip(arg, &ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4); | |
1601 | } | |
a6fd70bb | 1602 | |
cab50449 | 1603 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1604 | parse_SET_IPV4_DST(char *arg, struct ofpbuf *ofpacts, |
1605 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1606 | { | |
1607 | return str_to_ip(arg, &ofpact_put_SET_IPV4_DST(ofpacts)->ipv4); | |
1608 | } | |
a6fd70bb | 1609 | |
c2d936a4 BP |
1610 | static void |
1611 | format_SET_IPV4_SRC(const struct ofpact_ipv4 *a, struct ds *s) | |
1612 | { | |
1613 | ds_put_format(s, "mod_nw_src:"IP_FMT, IP_ARGS(a->ipv4)); | |
1614 | } | |
097d4939 | 1615 | |
c2d936a4 BP |
1616 | static void |
1617 | format_SET_IPV4_DST(const struct ofpact_ipv4 *a, struct ds *s) | |
1618 | { | |
1619 | ds_put_format(s, "mod_nw_dst:"IP_FMT, IP_ARGS(a->ipv4)); | |
1620 | } | |
1621 | \f | |
1622 | /* Set IPv4/v6 TOS actions. */ | |
097d4939 | 1623 | |
c2d936a4 | 1624 | static enum ofperr |
f3cd3ac7 JS |
1625 | decode_OFPAT_RAW_SET_NW_TOS(uint8_t dscp, |
1626 | enum ofp_version ofp_version OVS_UNUSED, | |
1627 | struct ofpbuf *out) | |
c2d936a4 BP |
1628 | { |
1629 | if (dscp & ~IP_DSCP_MASK) { | |
1630 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1631 | } else { | |
1632 | ofpact_put_SET_IP_DSCP(out)->dscp = dscp; | |
1633 | return 0; | |
a6fd70bb JR |
1634 | } |
1635 | } | |
1636 | ||
a6fd70bb | 1637 | static void |
c2d936a4 BP |
1638 | encode_SET_IP_DSCP(const struct ofpact_dscp *dscp, |
1639 | enum ofp_version ofp_version, struct ofpbuf *out) | |
a6fd70bb | 1640 | { |
c2d936a4 BP |
1641 | if (ofp_version < OFP12_VERSION) { |
1642 | put_OFPAT_SET_NW_TOS(out, ofp_version, dscp->dscp); | |
1643 | } else { | |
1644 | ofpact_put_set_field(out, ofp_version, | |
1645 | MFF_IP_DSCP_SHIFTED, dscp->dscp >> 2); | |
1646 | } | |
1647 | } | |
a6fd70bb | 1648 | |
cab50449 | 1649 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1650 | parse_SET_IP_DSCP(char *arg, struct ofpbuf *ofpacts, |
1651 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1652 | { | |
1653 | uint8_t tos; | |
1654 | char *error; | |
a6fd70bb | 1655 | |
c2d936a4 BP |
1656 | error = str_to_u8(arg, "TOS", &tos); |
1657 | if (error) { | |
1658 | return error; | |
1659 | } | |
a6fd70bb | 1660 | |
c2d936a4 BP |
1661 | if (tos & ~IP_DSCP_MASK) { |
1662 | return xasprintf("%s: not a valid TOS", arg); | |
a6fd70bb | 1663 | } |
c2d936a4 BP |
1664 | ofpact_put_SET_IP_DSCP(ofpacts)->dscp = tos; |
1665 | return NULL; | |
a6fd70bb JR |
1666 | } |
1667 | ||
b2dd70be | 1668 | static void |
c2d936a4 | 1669 | format_SET_IP_DSCP(const struct ofpact_dscp *a, struct ds *s) |
b2dd70be | 1670 | { |
c2d936a4 BP |
1671 | ds_put_format(s, "mod_nw_tos:%d", a->dscp); |
1672 | } | |
1673 | \f | |
1674 | /* Set IPv4/v6 ECN actions. */ | |
b2dd70be | 1675 | |
c2d936a4 | 1676 | static enum ofperr |
f3cd3ac7 JS |
1677 | decode_OFPAT_RAW11_SET_NW_ECN(uint8_t ecn, |
1678 | enum ofp_version ofp_version OVS_UNUSED, | |
1679 | struct ofpbuf *out) | |
c2d936a4 BP |
1680 | { |
1681 | if (ecn & ~IP_ECN_MASK) { | |
1682 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
b2dd70be | 1683 | } else { |
c2d936a4 BP |
1684 | ofpact_put_SET_IP_ECN(out)->ecn = ecn; |
1685 | return 0; | |
b2dd70be JR |
1686 | } |
1687 | } | |
1688 | ||
c2d936a4 BP |
1689 | static void |
1690 | encode_SET_IP_ECN(const struct ofpact_ecn *ip_ecn, | |
1691 | enum ofp_version ofp_version, struct ofpbuf *out) | |
d01c980f | 1692 | { |
c2d936a4 BP |
1693 | uint8_t ecn = ip_ecn->ecn; |
1694 | if (ofp_version == OFP10_VERSION) { | |
1695 | /* XXX */ | |
1696 | } else if (ofp_version == OFP11_VERSION) { | |
1697 | put_OFPAT11_SET_NW_ECN(out, ecn); | |
1698 | } else { | |
1699 | ofpact_put_set_field(out, ofp_version, MFF_IP_ECN, ecn); | |
1700 | } | |
1701 | } | |
d01c980f | 1702 | |
cab50449 | 1703 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1704 | parse_SET_IP_ECN(char *arg, struct ofpbuf *ofpacts, |
1705 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1706 | { | |
1707 | uint8_t ecn; | |
1708 | char *error; | |
d01c980f | 1709 | |
c2d936a4 | 1710 | error = str_to_u8(arg, "ECN", &ecn); |
d01c980f BP |
1711 | if (error) { |
1712 | return error; | |
1713 | } | |
1714 | ||
c2d936a4 BP |
1715 | if (ecn & ~IP_ECN_MASK) { |
1716 | return xasprintf("%s: not a valid ECN", arg); | |
1717 | } | |
1718 | ofpact_put_SET_IP_ECN(ofpacts)->ecn = ecn; | |
1719 | return NULL; | |
d01c980f BP |
1720 | } |
1721 | ||
c2d936a4 BP |
1722 | static void |
1723 | format_SET_IP_ECN(const struct ofpact_ecn *a, struct ds *s) | |
1724 | { | |
1725 | ds_put_format(s, "mod_nw_ecn:%d", a->ecn); | |
1726 | } | |
1727 | \f | |
1728 | /* Set IPv4/v6 TTL actions. */ | |
1729 | ||
d01c980f | 1730 | static enum ofperr |
f3cd3ac7 JS |
1731 | decode_OFPAT_RAW11_SET_NW_TTL(uint8_t ttl, |
1732 | enum ofp_version ofp_version OVS_UNUSED, | |
1733 | struct ofpbuf *out) | |
d01c980f | 1734 | { |
c2d936a4 BP |
1735 | ofpact_put_SET_IP_TTL(out)->ttl = ttl; |
1736 | return 0; | |
1737 | } | |
1738 | ||
1739 | static void | |
1740 | encode_SET_IP_TTL(const struct ofpact_ip_ttl *ttl, | |
1741 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1742 | { | |
1743 | if (ofp_version >= OFP11_VERSION) { | |
1744 | put_OFPAT11_SET_NW_TTL(out, ttl->ttl); | |
1745 | } else { | |
1746 | /* XXX */ | |
1747 | } | |
1748 | } | |
1749 | ||
cab50449 | 1750 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1751 | parse_SET_IP_TTL(char *arg, struct ofpbuf *ofpacts, |
1752 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1753 | { | |
1754 | uint8_t ttl; | |
1755 | char *error; | |
d01c980f | 1756 | |
c2d936a4 | 1757 | error = str_to_u8(arg, "TTL", &ttl); |
d01c980f BP |
1758 | if (error) { |
1759 | return error; | |
1760 | } | |
1761 | ||
c2d936a4 BP |
1762 | ofpact_put_SET_IP_TTL(ofpacts)->ttl = ttl; |
1763 | return NULL; | |
1764 | } | |
d01c980f | 1765 | |
c2d936a4 BP |
1766 | static void |
1767 | format_SET_IP_TTL(const struct ofpact_ip_ttl *a, struct ds *s) | |
1768 | { | |
1769 | ds_put_format(s, "mod_nw_ttl:%d", a->ttl); | |
1770 | } | |
1771 | \f | |
1772 | /* Set TCP/UDP/SCTP port actions. */ | |
d01c980f | 1773 | |
c2d936a4 | 1774 | static enum ofperr |
f3cd3ac7 JS |
1775 | decode_OFPAT_RAW_SET_TP_SRC(ovs_be16 port, |
1776 | enum ofp_version ofp_version OVS_UNUSED, | |
1777 | struct ofpbuf *out) | |
c2d936a4 BP |
1778 | { |
1779 | ofpact_put_SET_L4_SRC_PORT(out)->port = ntohs(port); | |
1780 | return 0; | |
1781 | } | |
d01c980f | 1782 | |
c2d936a4 | 1783 | static enum ofperr |
f3cd3ac7 JS |
1784 | decode_OFPAT_RAW_SET_TP_DST(ovs_be16 port, |
1785 | enum ofp_version ofp_version OVS_UNUSED, | |
1786 | struct ofpbuf *out) | |
c2d936a4 BP |
1787 | { |
1788 | ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(port); | |
1789 | return 0; | |
1790 | } | |
d01c980f | 1791 | |
c2d936a4 BP |
1792 | static void |
1793 | encode_SET_L4_port(const struct ofpact_l4_port *l4_port, | |
1794 | enum ofp_version ofp_version, enum ofp_raw_action_type raw, | |
1795 | enum mf_field_id field, struct ofpbuf *out) | |
1796 | { | |
1797 | uint16_t port = l4_port->port; | |
3e34fbdd | 1798 | |
c2d936a4 BP |
1799 | if (ofp_version >= OFP12_VERSION && field != MFF_N_IDS) { |
1800 | ofpact_put_set_field(out, ofp_version, field, port); | |
1801 | } else { | |
1802 | ofpact_put_raw(out, ofp_version, raw, port); | |
1803 | } | |
1804 | } | |
8e61c110 | 1805 | |
c2d936a4 BP |
1806 | static void |
1807 | encode_SET_L4_SRC_PORT(const struct ofpact_l4_port *l4_port, | |
1808 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1809 | { | |
1810 | uint8_t proto = l4_port->flow_ip_proto; | |
1811 | enum mf_field_id field = (proto == IPPROTO_TCP ? MFF_TCP_SRC | |
1812 | : proto == IPPROTO_UDP ? MFF_UDP_SRC | |
1813 | : proto == IPPROTO_SCTP ? MFF_SCTP_SRC | |
1814 | : MFF_N_IDS); | |
276c4e7a | 1815 | |
c2d936a4 BP |
1816 | encode_SET_L4_port(l4_port, ofp_version, OFPAT_RAW_SET_TP_SRC, field, out); |
1817 | } | |
d01c980f | 1818 | |
c2d936a4 BP |
1819 | static void |
1820 | encode_SET_L4_DST_PORT(const struct ofpact_l4_port *l4_port, | |
1821 | enum ofp_version ofp_version, | |
1822 | struct ofpbuf *out) | |
1823 | { | |
1824 | uint8_t proto = l4_port->flow_ip_proto; | |
1825 | enum mf_field_id field = (proto == IPPROTO_TCP ? MFF_TCP_DST | |
1826 | : proto == IPPROTO_UDP ? MFF_UDP_DST | |
1827 | : proto == IPPROTO_SCTP ? MFF_SCTP_DST | |
1828 | : MFF_N_IDS); | |
d01c980f | 1829 | |
c2d936a4 BP |
1830 | encode_SET_L4_port(l4_port, ofp_version, OFPAT_RAW_SET_TP_DST, field, out); |
1831 | } | |
7bcb1506 | 1832 | |
cab50449 | 1833 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1834 | parse_SET_L4_SRC_PORT(char *arg, struct ofpbuf *ofpacts, |
1835 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1836 | { | |
1837 | return str_to_u16(arg, "source port", | |
1838 | &ofpact_put_SET_L4_SRC_PORT(ofpacts)->port); | |
1839 | } | |
d01c980f | 1840 | |
cab50449 | 1841 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1842 | parse_SET_L4_DST_PORT(char *arg, struct ofpbuf *ofpacts, |
1843 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1844 | { | |
1845 | return str_to_u16(arg, "destination port", | |
1846 | &ofpact_put_SET_L4_DST_PORT(ofpacts)->port); | |
1847 | } | |
d01c980f | 1848 | |
c2d936a4 BP |
1849 | static void |
1850 | format_SET_L4_SRC_PORT(const struct ofpact_l4_port *a, struct ds *s) | |
1851 | { | |
1852 | ds_put_format(s, "mod_tp_src:%d", a->port); | |
1853 | } | |
d01c980f | 1854 | |
c2d936a4 BP |
1855 | static void |
1856 | format_SET_L4_DST_PORT(const struct ofpact_l4_port *a, struct ds *s) | |
1857 | { | |
1858 | ds_put_format(s, "mod_tp_dst:%d", a->port); | |
1859 | } | |
1860 | \f | |
73178f20 BP |
1861 | /* Action structure for OFPAT_COPY_FIELD. */ |
1862 | struct ofp15_action_copy_field { | |
1863 | ovs_be16 type; /* OFPAT_COPY_FIELD. */ | |
1864 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
1865 | ovs_be16 n_bits; /* Number of bits to copy. */ | |
1866 | ovs_be16 src_offset; /* Starting bit offset in source. */ | |
1867 | ovs_be16 dst_offset; /* Starting bit offset in destination. */ | |
650763d8 | 1868 | uint8_t pad[2]; |
f13cdd73 BP |
1869 | /* Followed by: |
1870 | * - OXM header for source field. | |
1871 | * - OXM header for destination field. | |
1872 | * - Padding with 0-bytes to a multiple of 8 bytes. | |
650763d8 BP |
1873 | * The "pad2" member is the beginning of the above. */ |
1874 | uint8_t pad2[4]; | |
73178f20 | 1875 | }; |
f13cdd73 | 1876 | OFP_ASSERT(sizeof(struct ofp15_action_copy_field) == 16); |
73178f20 | 1877 | |
914624f8 BP |
1878 | /* Action structure for OpenFlow 1.3 extension copy-field action.. */ |
1879 | struct onf_action_copy_field { | |
1880 | ovs_be16 type; /* OFPAT_EXPERIMENTER. */ | |
1881 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
1882 | ovs_be32 experimenter; /* ONF_VENDOR_ID. */ | |
1883 | ovs_be16 exp_type; /* 3200. */ | |
1884 | uint8_t pad[2]; /* Not used. */ | |
1885 | ovs_be16 n_bits; /* Number of bits to copy. */ | |
1886 | ovs_be16 src_offset; /* Starting bit offset in source. */ | |
1887 | ovs_be16 dst_offset; /* Starting bit offset in destination. */ | |
1888 | uint8_t pad2[2]; /* Not used. */ | |
1889 | /* Followed by: | |
1890 | * - OXM header for source field. | |
1891 | * - OXM header for destination field. | |
1892 | * - Padding with 0-bytes (either 0 or 4 of them) to a multiple of 8 bytes. | |
1893 | * The "pad3" member is the beginning of the above. */ | |
1894 | uint8_t pad3[4]; /* Not used. */ | |
1895 | }; | |
1896 | OFP_ASSERT(sizeof(struct onf_action_copy_field) == 24); | |
1897 | ||
c2d936a4 BP |
1898 | /* Action structure for NXAST_REG_MOVE. |
1899 | * | |
1900 | * Copies src[src_ofs:src_ofs+n_bits] to dst[dst_ofs:dst_ofs+n_bits], where | |
1901 | * a[b:c] denotes the bits within 'a' numbered 'b' through 'c' (not including | |
1902 | * bit 'c'). Bit numbering starts at 0 for the least-significant bit, 1 for | |
1903 | * the next most significant bit, and so on. | |
1904 | * | |
1905 | * 'src' and 'dst' are nxm_header values with nxm_hasmask=0. (It doesn't make | |
1906 | * sense to use nxm_hasmask=1 because the action does not do any kind of | |
1907 | * matching; it uses the actual value of a field.) | |
1908 | * | |
1909 | * The following nxm_header values are potentially acceptable as 'src': | |
1910 | * | |
1911 | * - NXM_OF_IN_PORT | |
1912 | * - NXM_OF_ETH_DST | |
1913 | * - NXM_OF_ETH_SRC | |
1914 | * - NXM_OF_ETH_TYPE | |
1915 | * - NXM_OF_VLAN_TCI | |
1916 | * - NXM_OF_IP_TOS | |
1917 | * - NXM_OF_IP_PROTO | |
1918 | * - NXM_OF_IP_SRC | |
1919 | * - NXM_OF_IP_DST | |
1920 | * - NXM_OF_TCP_SRC | |
1921 | * - NXM_OF_TCP_DST | |
1922 | * - NXM_OF_UDP_SRC | |
1923 | * - NXM_OF_UDP_DST | |
1924 | * - NXM_OF_ICMP_TYPE | |
1925 | * - NXM_OF_ICMP_CODE | |
1926 | * - NXM_OF_ARP_OP | |
1927 | * - NXM_OF_ARP_SPA | |
1928 | * - NXM_OF_ARP_TPA | |
1929 | * - NXM_NX_TUN_ID | |
1930 | * - NXM_NX_ARP_SHA | |
1931 | * - NXM_NX_ARP_THA | |
1932 | * - NXM_NX_ICMPV6_TYPE | |
1933 | * - NXM_NX_ICMPV6_CODE | |
1934 | * - NXM_NX_ND_SLL | |
1935 | * - NXM_NX_ND_TLL | |
1936 | * - NXM_NX_REG(idx) for idx in the switch's accepted range. | |
1937 | * - NXM_NX_PKT_MARK | |
1938 | * - NXM_NX_TUN_IPV4_SRC | |
1939 | * - NXM_NX_TUN_IPV4_DST | |
1940 | * | |
1941 | * The following nxm_header values are potentially acceptable as 'dst': | |
1942 | * | |
1943 | * - NXM_OF_ETH_DST | |
1944 | * - NXM_OF_ETH_SRC | |
1945 | * - NXM_OF_IP_TOS | |
1946 | * - NXM_OF_IP_SRC | |
1947 | * - NXM_OF_IP_DST | |
1948 | * - NXM_OF_TCP_SRC | |
1949 | * - NXM_OF_TCP_DST | |
1950 | * - NXM_OF_UDP_SRC | |
1951 | * - NXM_OF_UDP_DST | |
f6ecf944 JP |
1952 | * - NXM_OF_ICMP_TYPE |
1953 | * - NXM_OF_ICMP_CODE | |
1954 | * - NXM_NX_ICMPV6_TYPE | |
1955 | * - NXM_NX_ICMPV6_CODE | |
c2d936a4 BP |
1956 | * - NXM_NX_ARP_SHA |
1957 | * - NXM_NX_ARP_THA | |
1958 | * - NXM_OF_ARP_OP | |
1959 | * - NXM_OF_ARP_SPA | |
1960 | * - NXM_OF_ARP_TPA | |
1961 | * Modifying any of the above fields changes the corresponding packet | |
1962 | * header. | |
1963 | * | |
1964 | * - NXM_OF_IN_PORT | |
1965 | * | |
1966 | * - NXM_NX_REG(idx) for idx in the switch's accepted range. | |
1967 | * | |
1968 | * - NXM_NX_PKT_MARK | |
1969 | * | |
1970 | * - NXM_OF_VLAN_TCI. Modifying this field's value has side effects on the | |
1971 | * packet's 802.1Q header. Setting a value with CFI=0 removes the 802.1Q | |
1972 | * header (if any), ignoring the other bits. Setting a value with CFI=1 | |
1973 | * adds or modifies the 802.1Q header appropriately, setting the TCI field | |
1974 | * to the field's new value (with the CFI bit masked out). | |
1975 | * | |
1976 | * - NXM_NX_TUN_ID, NXM_NX_TUN_IPV4_SRC, NXM_NX_TUN_IPV4_DST. Modifying | |
1977 | * any of these values modifies the corresponding tunnel header field used | |
1978 | * for the packet's next tunnel encapsulation, if allowed by the | |
1979 | * configuration of the output tunnel port. | |
1980 | * | |
1981 | * A given nxm_header value may be used as 'src' or 'dst' only on a flow whose | |
1982 | * nx_match satisfies its prerequisites. For example, NXM_OF_IP_TOS may be | |
1983 | * used only if the flow's nx_match includes an nxm_entry that specifies | |
1984 | * nxm_type=NXM_OF_ETH_TYPE, nxm_hasmask=0, and nxm_value=0x0800. | |
1985 | * | |
1986 | * The switch will reject actions for which src_ofs+n_bits is greater than the | |
1987 | * width of 'src' or dst_ofs+n_bits is greater than the width of 'dst' with | |
1988 | * error type OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT. | |
1989 | * | |
1990 | * This action behaves properly when 'src' overlaps with 'dst', that is, it | |
1991 | * behaves as if 'src' were copied out to a temporary buffer, then the | |
1992 | * temporary buffer copied to 'dst'. | |
1993 | */ | |
1994 | struct nx_action_reg_move { | |
1995 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
1996 | ovs_be16 len; /* Length is 24. */ | |
1997 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
1998 | ovs_be16 subtype; /* NXAST_REG_MOVE. */ | |
1999 | ovs_be16 n_bits; /* Number of bits. */ | |
2000 | ovs_be16 src_ofs; /* Starting bit offset in source. */ | |
2001 | ovs_be16 dst_ofs; /* Starting bit offset in destination. */ | |
bad8a439 BP |
2002 | /* Followed by: |
2003 | * - OXM/NXM header for source field (4 or 8 bytes). | |
2004 | * - OXM/NXM header for destination field (4 or 8 bytes). | |
2005 | * - Padding with 0-bytes to a multiple of 8 bytes, if necessary. */ | |
c2d936a4 | 2006 | }; |
bad8a439 | 2007 | OFP_ASSERT(sizeof(struct nx_action_reg_move) == 16); |
ff14eb7a | 2008 | |
73178f20 | 2009 | static enum ofperr |
914624f8 BP |
2010 | decode_copy_field__(ovs_be16 src_offset, ovs_be16 dst_offset, ovs_be16 n_bits, |
2011 | const void *action, ovs_be16 action_len, size_t oxm_offset, | |
2012 | struct ofpbuf *ofpacts) | |
73178f20 BP |
2013 | { |
2014 | struct ofpact_reg_move *move; | |
f13cdd73 | 2015 | enum ofperr error; |
f13cdd73 | 2016 | struct ofpbuf b; |
73178f20 BP |
2017 | |
2018 | move = ofpact_put_REG_MOVE(ofpacts); | |
914624f8 BP |
2019 | move->ofpact.raw = ONFACT_RAW13_COPY_FIELD; |
2020 | move->src.ofs = ntohs(src_offset); | |
2021 | move->src.n_bits = ntohs(n_bits); | |
2022 | move->dst.ofs = ntohs(dst_offset); | |
2023 | move->dst.n_bits = ntohs(n_bits); | |
2024 | ||
2025 | ofpbuf_use_const(&b, action, ntohs(action_len)); | |
2026 | ofpbuf_pull(&b, oxm_offset); | |
f13cdd73 BP |
2027 | error = nx_pull_header(&b, &move->src.field, NULL); |
2028 | if (error) { | |
2029 | return error; | |
2030 | } | |
2031 | error = nx_pull_header(&b, &move->dst.field, NULL); | |
2032 | if (error) { | |
2033 | return error; | |
2034 | } | |
f13cdd73 | 2035 | |
6fd6ed71 | 2036 | if (!is_all_zeros(b.data, b.size)) { |
f13cdd73 BP |
2037 | return OFPERR_NXBRC_MUST_BE_ZERO; |
2038 | } | |
2039 | ||
73178f20 BP |
2040 | return nxm_reg_move_check(move, NULL); |
2041 | } | |
2042 | ||
914624f8 BP |
2043 | static enum ofperr |
2044 | decode_OFPAT_RAW15_COPY_FIELD(const struct ofp15_action_copy_field *oacf, | |
f3cd3ac7 | 2045 | enum ofp_version ofp_version OVS_UNUSED, |
914624f8 BP |
2046 | struct ofpbuf *ofpacts) |
2047 | { | |
2048 | return decode_copy_field__(oacf->src_offset, oacf->dst_offset, | |
2049 | oacf->n_bits, oacf, oacf->len, | |
2050 | OBJECT_OFFSETOF(oacf, pad2), ofpacts); | |
2051 | } | |
2052 | ||
2053 | static enum ofperr | |
2054 | decode_ONFACT_RAW13_COPY_FIELD(const struct onf_action_copy_field *oacf, | |
f3cd3ac7 | 2055 | enum ofp_version ofp_version OVS_UNUSED, |
914624f8 BP |
2056 | struct ofpbuf *ofpacts) |
2057 | { | |
2058 | return decode_copy_field__(oacf->src_offset, oacf->dst_offset, | |
2059 | oacf->n_bits, oacf, oacf->len, | |
2060 | OBJECT_OFFSETOF(oacf, pad3), ofpacts); | |
2061 | } | |
2062 | ||
c2d936a4 BP |
2063 | static enum ofperr |
2064 | decode_NXAST_RAW_REG_MOVE(const struct nx_action_reg_move *narm, | |
f3cd3ac7 | 2065 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
2066 | struct ofpbuf *ofpacts) |
2067 | { | |
2068 | struct ofpact_reg_move *move; | |
bad8a439 BP |
2069 | enum ofperr error; |
2070 | struct ofpbuf b; | |
0c20dbe4 | 2071 | |
c2d936a4 | 2072 | move = ofpact_put_REG_MOVE(ofpacts); |
914624f8 | 2073 | move->ofpact.raw = NXAST_RAW_REG_MOVE; |
c2d936a4 BP |
2074 | move->src.ofs = ntohs(narm->src_ofs); |
2075 | move->src.n_bits = ntohs(narm->n_bits); | |
c2d936a4 BP |
2076 | move->dst.ofs = ntohs(narm->dst_ofs); |
2077 | move->dst.n_bits = ntohs(narm->n_bits); | |
d01c980f | 2078 | |
bad8a439 BP |
2079 | ofpbuf_use_const(&b, narm, ntohs(narm->len)); |
2080 | ofpbuf_pull(&b, sizeof *narm); | |
2081 | error = nx_pull_header(&b, &move->src.field, NULL); | |
2082 | if (error) { | |
2083 | return error; | |
2084 | } | |
2085 | error = nx_pull_header(&b, &move->dst.field, NULL); | |
2086 | if (error) { | |
2087 | return error; | |
2088 | } | |
6fd6ed71 | 2089 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2090 | return OFPERR_NXBRC_MUST_BE_ZERO; |
2091 | } | |
2092 | ||
c2d936a4 BP |
2093 | return nxm_reg_move_check(move, NULL); |
2094 | } | |
d01c980f | 2095 | |
c2d936a4 BP |
2096 | static void |
2097 | encode_REG_MOVE(const struct ofpact_reg_move *move, | |
73178f20 BP |
2098 | enum ofp_version ofp_version, struct ofpbuf *out) |
2099 | { | |
914624f8 BP |
2100 | /* For OpenFlow 1.3, the choice of ONFACT_RAW13_COPY_FIELD versus |
2101 | * NXAST_RAW_REG_MOVE is somewhat difficult. Neither one is guaranteed to | |
2102 | * be supported by every OpenFlow 1.3 implementation. It would be ideal to | |
2103 | * probe for support. Until we have that ability, we currently prefer | |
2104 | * NXAST_RAW_REG_MOVE for backward compatibility with older Open vSwitch | |
2105 | * versions. */ | |
6fd6ed71 | 2106 | size_t start_ofs = out->size; |
73178f20 | 2107 | if (ofp_version >= OFP15_VERSION) { |
bad8a439 | 2108 | struct ofp15_action_copy_field *copy = put_OFPAT15_COPY_FIELD(out); |
73178f20 BP |
2109 | copy->n_bits = htons(move->dst.n_bits); |
2110 | copy->src_offset = htons(move->src.ofs); | |
2111 | copy->dst_offset = htons(move->dst.ofs); | |
6fd6ed71 | 2112 | out->size = out->size - sizeof copy->pad2; |
f13cdd73 BP |
2113 | nx_put_header(out, move->src.field->id, ofp_version, false); |
2114 | nx_put_header(out, move->dst.field->id, ofp_version, false); | |
914624f8 BP |
2115 | } else if (ofp_version == OFP13_VERSION |
2116 | && move->ofpact.raw == ONFACT_RAW13_COPY_FIELD) { | |
2117 | struct onf_action_copy_field *copy = put_ONFACT13_COPY_FIELD(out); | |
2118 | copy->n_bits = htons(move->dst.n_bits); | |
2119 | copy->src_offset = htons(move->src.ofs); | |
2120 | copy->dst_offset = htons(move->dst.ofs); | |
6fd6ed71 | 2121 | out->size = out->size - sizeof copy->pad3; |
914624f8 BP |
2122 | nx_put_header(out, move->src.field->id, ofp_version, false); |
2123 | nx_put_header(out, move->dst.field->id, ofp_version, false); | |
73178f20 | 2124 | } else { |
bad8a439 | 2125 | struct nx_action_reg_move *narm = put_NXAST_REG_MOVE(out); |
73178f20 BP |
2126 | narm->n_bits = htons(move->dst.n_bits); |
2127 | narm->src_ofs = htons(move->src.ofs); | |
2128 | narm->dst_ofs = htons(move->dst.ofs); | |
bad8a439 BP |
2129 | nx_put_header(out, move->src.field->id, 0, false); |
2130 | nx_put_header(out, move->dst.field->id, 0, false); | |
73178f20 | 2131 | } |
bad8a439 | 2132 | pad_ofpat(out, start_ofs); |
c2d936a4 | 2133 | } |
e9536ecb | 2134 | |
cab50449 | 2135 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2136 | parse_REG_MOVE(const char *arg, struct ofpbuf *ofpacts, |
2137 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2138 | { | |
2139 | struct ofpact_reg_move *move = ofpact_put_REG_MOVE(ofpacts); | |
2140 | const char *full_arg = arg; | |
2141 | char *error; | |
097d4939 | 2142 | |
c2d936a4 BP |
2143 | error = mf_parse_subfield__(&move->src, &arg); |
2144 | if (error) { | |
2145 | return error; | |
2146 | } | |
2147 | if (strncmp(arg, "->", 2)) { | |
2148 | return xasprintf("%s: missing `->' following source", full_arg); | |
2149 | } | |
2150 | arg += 2; | |
2151 | error = mf_parse_subfield(&move->dst, arg); | |
2152 | if (error) { | |
2153 | return error; | |
2154 | } | |
097d4939 | 2155 | |
c2d936a4 BP |
2156 | if (move->src.n_bits != move->dst.n_bits) { |
2157 | return xasprintf("%s: source field is %d bits wide but destination is " | |
2158 | "%d bits wide", full_arg, | |
2159 | move->src.n_bits, move->dst.n_bits); | |
2160 | } | |
2161 | return NULL; | |
2162 | } | |
0f3f3c3d | 2163 | |
c2d936a4 BP |
2164 | static void |
2165 | format_REG_MOVE(const struct ofpact_reg_move *a, struct ds *s) | |
2166 | { | |
2167 | nxm_format_reg_move(a, s); | |
2168 | } | |
2169 | \f | |
7eb4b1f1 BP |
2170 | /* Action structure for OFPAT12_SET_FIELD. */ |
2171 | struct ofp12_action_set_field { | |
2172 | ovs_be16 type; /* OFPAT12_SET_FIELD. */ | |
2173 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
2174 | ||
2175 | /* Followed by: | |
2176 | * - An OXM header, value, and (in OpenFlow 1.5+) optionally a mask. | |
2177 | * - Enough 0-bytes to pad out to a multiple of 64 bits. | |
2178 | * | |
2179 | * The "pad" member is the beginning of the above. */ | |
2180 | uint8_t pad[4]; | |
2181 | }; | |
2182 | OFP_ASSERT(sizeof(struct ofp12_action_set_field) == 8); | |
2183 | ||
c2d936a4 BP |
2184 | /* Action structure for NXAST_REG_LOAD. |
2185 | * | |
2186 | * Copies value[0:n_bits] to dst[ofs:ofs+n_bits], where a[b:c] denotes the bits | |
2187 | * within 'a' numbered 'b' through 'c' (not including bit 'c'). Bit numbering | |
2188 | * starts at 0 for the least-significant bit, 1 for the next most significant | |
2189 | * bit, and so on. | |
2190 | * | |
2191 | * 'dst' is an nxm_header with nxm_hasmask=0. See the documentation for | |
2192 | * NXAST_REG_MOVE, above, for the permitted fields and for the side effects of | |
2193 | * loading them. | |
2194 | * | |
2195 | * The 'ofs' and 'n_bits' fields are combined into a single 'ofs_nbits' field | |
2196 | * to avoid enlarging the structure by another 8 bytes. To allow 'n_bits' to | |
2197 | * take a value between 1 and 64 (inclusive) while taking up only 6 bits, it is | |
2198 | * also stored as one less than its true value: | |
2199 | * | |
2200 | * 15 6 5 0 | |
2201 | * +------------------------------+------------------+ | |
2202 | * | ofs | n_bits - 1 | | |
2203 | * +------------------------------+------------------+ | |
2204 | * | |
2205 | * The switch will reject actions for which ofs+n_bits is greater than the | |
2206 | * width of 'dst', or in which any bits in 'value' with value 2**n_bits or | |
2207 | * greater are set to 1, with error type OFPET_BAD_ACTION, code | |
2208 | * OFPBAC_BAD_ARGUMENT. | |
2209 | */ | |
2210 | struct nx_action_reg_load { | |
2211 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2212 | ovs_be16 len; /* Length is 24. */ | |
2213 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2214 | ovs_be16 subtype; /* NXAST_REG_LOAD. */ | |
2215 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
2216 | ovs_be32 dst; /* Destination register. */ | |
2217 | ovs_be64 value; /* Immediate value. */ | |
2218 | }; | |
2219 | OFP_ASSERT(sizeof(struct nx_action_reg_load) == 24); | |
b676167a | 2220 | |
bad8a439 BP |
2221 | /* Action structure for NXAST_REG_LOAD2. |
2222 | * | |
2223 | * Compared to OFPAT_SET_FIELD, we can use this to set whole or partial fields | |
2224 | * in any OpenFlow version. Compared to NXAST_REG_LOAD, we can use this to set | |
2225 | * OXM experimenter fields. */ | |
2226 | struct nx_action_reg_load2 { | |
2227 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2228 | ovs_be16 len; /* At least 16. */ | |
2229 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2230 | ovs_be16 subtype; /* NXAST_SET_FIELD. */ | |
2231 | ||
2232 | /* Followed by: | |
2233 | * - An NXM/OXM header, value, and optionally a mask. | |
2234 | * - Enough 0-bytes to pad out to a multiple of 64 bits. | |
2235 | * | |
2236 | * The "pad" member is the beginning of the above. */ | |
2237 | uint8_t pad[6]; | |
2238 | }; | |
2239 | OFP_ASSERT(sizeof(struct nx_action_reg_load2) == 16); | |
2240 | ||
c2d936a4 | 2241 | static enum ofperr |
7eb4b1f1 BP |
2242 | decode_ofpat_set_field(const struct ofp12_action_set_field *oasf, |
2243 | bool may_mask, struct ofpbuf *ofpacts) | |
7fdb60a7 | 2244 | { |
c2d936a4 | 2245 | struct ofpact_set_field *sf; |
178742f9 BP |
2246 | enum ofperr error; |
2247 | struct ofpbuf b; | |
7fdb60a7 | 2248 | |
178742f9 BP |
2249 | sf = ofpact_put_SET_FIELD(ofpacts); |
2250 | ||
2251 | ofpbuf_use_const(&b, oasf, ntohs(oasf->len)); | |
7eb4b1f1 BP |
2252 | ofpbuf_pull(&b, OBJECT_OFFSETOF(oasf, pad)); |
2253 | error = nx_pull_entry(&b, &sf->field, &sf->value, | |
2254 | may_mask ? &sf->mask : NULL); | |
178742f9 | 2255 | if (error) { |
178742f9 BP |
2256 | return (error == OFPERR_OFPBMC_BAD_MASK |
2257 | ? OFPERR_OFPBAC_BAD_SET_MASK | |
2258 | : error); | |
c2d936a4 | 2259 | } |
7eb4b1f1 BP |
2260 | if (!may_mask) { |
2261 | memset(&sf->mask, 0xff, sf->field->n_bytes); | |
2262 | } | |
178742f9 | 2263 | |
6fd6ed71 | 2264 | if (!is_all_zeros(b.data, b.size)) { |
c2d936a4 BP |
2265 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2266 | } | |
7fdb60a7 | 2267 | |
178742f9 BP |
2268 | /* OpenFlow says specifically that one may not set OXM_OF_IN_PORT via |
2269 | * Set-Field. */ | |
2270 | if (sf->field->id == MFF_IN_PORT_OXM) { | |
2271 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
c2d936a4 | 2272 | } |
178742f9 | 2273 | |
c2d936a4 | 2274 | /* oxm_length is now validated to be compatible with mf_value. */ |
178742f9 BP |
2275 | if (!sf->field->writable) { |
2276 | VLOG_WARN_RL(&rl, "destination field %s is not writable", | |
2277 | sf->field->name); | |
c2d936a4 BP |
2278 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2279 | } | |
c2d936a4 | 2280 | |
d3cb080e | 2281 | /* The value must be valid for match. OpenFlow 1.5 also says, |
7eb4b1f1 BP |
2282 | * "In an OXM_OF_VLAN_VID set-field action, the OFPVID_PRESENT bit must be |
2283 | * a 1-bit in oxm_value and in oxm_mask." */ | |
178742f9 BP |
2284 | if (!mf_is_value_valid(sf->field, &sf->value) |
2285 | || (sf->field->id == MFF_VLAN_VID | |
31c9ed6c BP |
2286 | && (!(sf->mask.be16 & htons(OFPVID12_PRESENT)) |
2287 | || !(sf->value.be16 & htons(OFPVID12_PRESENT))))) { | |
c2d936a4 | 2288 | struct ds ds = DS_EMPTY_INITIALIZER; |
178742f9 | 2289 | mf_format(sf->field, &sf->value, NULL, &ds); |
c2d936a4 | 2290 | VLOG_WARN_RL(&rl, "Invalid value for set field %s: %s", |
178742f9 | 2291 | sf->field->name, ds_cstr(&ds)); |
c2d936a4 BP |
2292 | ds_destroy(&ds); |
2293 | ||
2294 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
7fdb60a7 | 2295 | } |
c2d936a4 | 2296 | return 0; |
7fdb60a7 SH |
2297 | } |
2298 | ||
7eb4b1f1 BP |
2299 | static enum ofperr |
2300 | decode_OFPAT_RAW12_SET_FIELD(const struct ofp12_action_set_field *oasf, | |
f3cd3ac7 | 2301 | enum ofp_version ofp_version OVS_UNUSED, |
7eb4b1f1 BP |
2302 | struct ofpbuf *ofpacts) |
2303 | { | |
2304 | return decode_ofpat_set_field(oasf, false, ofpacts); | |
2305 | } | |
2306 | ||
2307 | static enum ofperr | |
2308 | decode_OFPAT_RAW15_SET_FIELD(const struct ofp12_action_set_field *oasf, | |
f3cd3ac7 | 2309 | enum ofp_version ofp_version OVS_UNUSED, |
7eb4b1f1 BP |
2310 | struct ofpbuf *ofpacts) |
2311 | { | |
2312 | return decode_ofpat_set_field(oasf, true, ofpacts); | |
2313 | } | |
2314 | ||
2315 | static enum ofperr | |
2316 | decode_NXAST_RAW_REG_LOAD(const struct nx_action_reg_load *narl, | |
f3cd3ac7 | 2317 | enum ofp_version ofp_version OVS_UNUSED, |
7eb4b1f1 BP |
2318 | struct ofpbuf *out) |
2319 | { | |
2320 | struct ofpact_set_field *sf = ofpact_put_reg_load(out); | |
2321 | struct mf_subfield dst; | |
2322 | enum ofperr error; | |
2323 | ||
2324 | sf->ofpact.raw = NXAST_RAW_REG_LOAD; | |
2325 | ||
2326 | dst.field = mf_from_nxm_header(ntohl(narl->dst)); | |
2327 | dst.ofs = nxm_decode_ofs(narl->ofs_nbits); | |
2328 | dst.n_bits = nxm_decode_n_bits(narl->ofs_nbits); | |
2329 | error = mf_check_dst(&dst, NULL); | |
2330 | if (error) { | |
2331 | return error; | |
2332 | } | |
2333 | ||
2334 | /* Reject 'narl' if a bit numbered 'n_bits' or higher is set to 1 in | |
2335 | * narl->value. */ | |
2336 | if (dst.n_bits < 64 && ntohll(narl->value) >> dst.n_bits) { | |
2337 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
2338 | } | |
2339 | ||
2340 | sf->field = dst.field; | |
2341 | bitwise_put(ntohll(narl->value), | |
2342 | &sf->value, dst.field->n_bytes, dst.ofs, | |
2343 | dst.n_bits); | |
2344 | bitwise_put(UINT64_MAX, | |
2345 | &sf->mask, dst.field->n_bytes, dst.ofs, | |
2346 | dst.n_bits); | |
2347 | ||
2348 | return 0; | |
2349 | } | |
2350 | ||
bad8a439 BP |
2351 | static enum ofperr |
2352 | decode_NXAST_RAW_REG_LOAD2(const struct nx_action_reg_load2 *narl, | |
f3cd3ac7 | 2353 | enum ofp_version ofp_version OVS_UNUSED, |
bad8a439 BP |
2354 | struct ofpbuf *out) |
2355 | { | |
2356 | struct ofpact_set_field *sf; | |
2357 | enum ofperr error; | |
2358 | struct ofpbuf b; | |
2359 | ||
2360 | sf = ofpact_put_SET_FIELD(out); | |
2361 | sf->ofpact.raw = NXAST_RAW_REG_LOAD2; | |
2362 | ||
2363 | ofpbuf_use_const(&b, narl, ntohs(narl->len)); | |
2364 | ofpbuf_pull(&b, OBJECT_OFFSETOF(narl, pad)); | |
2365 | error = nx_pull_entry(&b, &sf->field, &sf->value, &sf->mask); | |
2366 | if (error) { | |
2367 | return error; | |
2368 | } | |
6fd6ed71 | 2369 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2370 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2371 | } | |
2372 | ||
2373 | if (!sf->field->writable) { | |
2374 | VLOG_WARN_RL(&rl, "destination field %s is not writable", | |
2375 | sf->field->name); | |
2376 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
2377 | } | |
2378 | return 0; | |
2379 | } | |
2380 | ||
7fdb60a7 | 2381 | static void |
c2d936a4 | 2382 | ofpact_put_set_field(struct ofpbuf *openflow, enum ofp_version ofp_version, |
178742f9 | 2383 | enum mf_field_id field, uint64_t value_) |
7fdb60a7 | 2384 | { |
7eb4b1f1 | 2385 | struct ofp12_action_set_field *oasf OVS_UNUSED; |
178742f9 | 2386 | int n_bytes = mf_from_id(field)->n_bytes; |
6fd6ed71 | 2387 | size_t start_ofs = openflow->size; |
178742f9 | 2388 | union mf_value value; |
7fdb60a7 | 2389 | |
178742f9 | 2390 | value.be64 = htonll(value_ << (8 * (8 - n_bytes))); |
7fdb60a7 | 2391 | |
7eb4b1f1 | 2392 | oasf = put_OFPAT12_SET_FIELD(openflow); |
6fd6ed71 | 2393 | openflow->size = openflow->size - sizeof oasf->pad; |
178742f9 BP |
2394 | nx_put_entry(openflow, field, ofp_version, &value, NULL); |
2395 | pad_ofpat(openflow, start_ofs); | |
7fdb60a7 SH |
2396 | } |
2397 | ||
7eb4b1f1 BP |
2398 | static bool |
2399 | next_load_segment(const struct ofpact_set_field *sf, | |
2400 | struct mf_subfield *dst, uint64_t *value) | |
2401 | { | |
fa078489 BP |
2402 | int n_bits = sf->field->n_bits; |
2403 | int n_bytes = sf->field->n_bytes; | |
7eb4b1f1 BP |
2404 | int start = dst->ofs + dst->n_bits; |
2405 | ||
fa078489 | 2406 | if (start < n_bits) { |
7eb4b1f1 | 2407 | dst->field = sf->field; |
fa078489 BP |
2408 | dst->ofs = bitwise_scan(&sf->mask, n_bytes, 1, start, n_bits); |
2409 | if (dst->ofs < n_bits) { | |
2410 | dst->n_bits = bitwise_scan(&sf->mask, n_bytes, 0, dst->ofs + 1, | |
2411 | MIN(dst->ofs + 64, n_bits)) - dst->ofs; | |
2412 | *value = bitwise_get(&sf->value, n_bytes, dst->ofs, dst->n_bits); | |
7eb4b1f1 BP |
2413 | return true; |
2414 | } | |
2415 | } | |
2416 | return false; | |
2417 | } | |
178742f9 | 2418 | |
7eb4b1f1 | 2419 | /* Convert 'sf' to a series of REG_LOADs. */ |
7fdb60a7 | 2420 | static void |
c2d936a4 | 2421 | set_field_to_nxast(const struct ofpact_set_field *sf, struct ofpbuf *openflow) |
7fdb60a7 | 2422 | { |
bad8a439 | 2423 | /* If 'sf' cannot be encoded as NXAST_REG_LOAD because it requires an |
4fe04a7e JG |
2424 | * experimenter OXM or is variable length (or if it came in as |
2425 | * NXAST_REG_LOAD2), encode as NXAST_REG_LOAD2. Otherwise use | |
2426 | * NXAST_REG_LOAD, which is backward compatible. */ | |
bad8a439 | 2427 | if (sf->ofpact.raw == NXAST_RAW_REG_LOAD2 |
4fe04a7e | 2428 | || !mf_nxm_header(sf->field->id) || sf->field->variable_len) { |
bad8a439 | 2429 | struct nx_action_reg_load2 *narl OVS_UNUSED; |
6fd6ed71 | 2430 | size_t start_ofs = openflow->size; |
bad8a439 BP |
2431 | |
2432 | narl = put_NXAST_REG_LOAD2(openflow); | |
6fd6ed71 | 2433 | openflow->size = openflow->size - sizeof narl->pad; |
bad8a439 BP |
2434 | nx_put_entry(openflow, sf->field->id, 0, &sf->value, &sf->mask); |
2435 | pad_ofpat(openflow, start_ofs); | |
2436 | } else { | |
2437 | struct mf_subfield dst; | |
2438 | uint64_t value; | |
7eb4b1f1 | 2439 | |
bad8a439 BP |
2440 | dst.ofs = dst.n_bits = 0; |
2441 | while (next_load_segment(sf, &dst, &value)) { | |
2442 | struct nx_action_reg_load *narl = put_NXAST_REG_LOAD(openflow); | |
2443 | narl->ofs_nbits = nxm_encode_ofs_nbits(dst.ofs, dst.n_bits); | |
2444 | narl->dst = htonl(mf_nxm_header(dst.field->id)); | |
2445 | narl->value = htonll(value); | |
2446 | } | |
7fdb60a7 SH |
2447 | } |
2448 | } | |
2449 | ||
7eb4b1f1 BP |
2450 | /* Convert 'sf', which must set an entire field, to standard OpenFlow 1.0/1.1 |
2451 | * actions, if we can, falling back to Nicira extensions if we must. | |
7fdb60a7 | 2452 | * |
c2d936a4 BP |
2453 | * We check only meta-flow types that can appear within set field actions and |
2454 | * that have a mapping to compatible action types. These struct mf_field | |
2455 | * definitions have a defined OXM or NXM header value and specify the field as | |
2456 | * writable. */ | |
2457 | static void | |
2458 | set_field_to_legacy_openflow(const struct ofpact_set_field *sf, | |
2459 | enum ofp_version ofp_version, | |
2460 | struct ofpbuf *out) | |
7fdb60a7 | 2461 | { |
c2d936a4 BP |
2462 | switch ((int) sf->field->id) { |
2463 | case MFF_VLAN_TCI: { | |
2464 | ovs_be16 tci = sf->value.be16; | |
2465 | bool cfi = (tci & htons(VLAN_CFI)) != 0; | |
2466 | uint16_t vid = vlan_tci_to_vid(tci); | |
2467 | uint8_t pcp = vlan_tci_to_pcp(tci); | |
2468 | ||
2469 | if (ofp_version < OFP11_VERSION) { | |
2470 | /* NXM_OF_VLAN_TCI to OpenFlow 1.0 mapping: | |
2471 | * | |
2472 | * If CFI=1, Add or modify VLAN VID & PCP. | |
2473 | * If CFI=0, strip VLAN header, if any. | |
2474 | */ | |
2475 | if (cfi) { | |
2476 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
2477 | put_OFPAT10_SET_VLAN_PCP(out, pcp); | |
2478 | } else { | |
2479 | put_OFPAT10_STRIP_VLAN(out); | |
2480 | } | |
2481 | } else { | |
2482 | /* NXM_OF_VLAN_TCI to OpenFlow 1.1 mapping: | |
2483 | * | |
2484 | * If CFI=1, Add or modify VLAN VID & PCP. | |
2485 | * OpenFlow 1.1 set actions only apply if the packet | |
2486 | * already has VLAN tags. To be sure that is the case | |
2487 | * we have to push a VLAN header. As we do not support | |
2488 | * multiple layers of VLANs, this is a no-op, if a VLAN | |
2489 | * header already exists. This may backfire, however, | |
2490 | * when we start supporting multiple layers of VLANs. | |
2491 | * If CFI=0, strip VLAN header, if any. | |
2492 | */ | |
2493 | if (cfi) { | |
2494 | /* Push a VLAN tag, if one was not seen at action validation | |
2495 | * time. */ | |
2496 | if (!sf->flow_has_vlan) { | |
2497 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
2498 | } | |
2499 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
2500 | put_OFPAT11_SET_VLAN_PCP(out, pcp); | |
2501 | } else { | |
2502 | /* If the flow did not match on vlan, we have no way of | |
2503 | * knowing if the vlan tag exists, so we must POP just to be | |
2504 | * sure. */ | |
2505 | put_OFPAT11_POP_VLAN(out); | |
2506 | } | |
2507 | } | |
2508 | break; | |
2509 | } | |
7fdb60a7 | 2510 | |
c2d936a4 BP |
2511 | case MFF_VLAN_VID: { |
2512 | uint16_t vid = ntohs(sf->value.be16) & VLAN_VID_MASK; | |
2513 | if (ofp_version == OFP10_VERSION) { | |
2514 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
2515 | } else { | |
2516 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
2517 | } | |
2518 | break; | |
2519 | } | |
2520 | ||
2521 | case MFF_VLAN_PCP: | |
2522 | if (ofp_version == OFP10_VERSION) { | |
2523 | put_OFPAT10_SET_VLAN_PCP(out, sf->value.u8); | |
2524 | } else { | |
2525 | put_OFPAT11_SET_VLAN_PCP(out, sf->value.u8); | |
2526 | } | |
2527 | break; | |
2528 | ||
2529 | case MFF_ETH_SRC: | |
74ff3298 | 2530 | put_OFPAT_SET_DL_SRC(out, ofp_version)->dl_addr = sf->value.mac; |
c2d936a4 BP |
2531 | break; |
2532 | ||
2533 | case MFF_ETH_DST: | |
74ff3298 | 2534 | put_OFPAT_SET_DL_DST(out, ofp_version)->dl_addr = sf->value.mac; |
c2d936a4 BP |
2535 | break; |
2536 | ||
2537 | case MFF_IPV4_SRC: | |
2538 | put_OFPAT_SET_NW_SRC(out, ofp_version, sf->value.be32); | |
2539 | break; | |
2540 | ||
2541 | case MFF_IPV4_DST: | |
2542 | put_OFPAT_SET_NW_DST(out, ofp_version, sf->value.be32); | |
2543 | break; | |
2544 | ||
2545 | case MFF_IP_DSCP: | |
2546 | put_OFPAT_SET_NW_TOS(out, ofp_version, sf->value.u8); | |
2547 | break; | |
2548 | ||
2549 | case MFF_IP_DSCP_SHIFTED: | |
2550 | put_OFPAT_SET_NW_TOS(out, ofp_version, sf->value.u8 << 2); | |
2551 | break; | |
2552 | ||
2553 | case MFF_TCP_SRC: | |
2554 | case MFF_UDP_SRC: | |
2555 | put_OFPAT_SET_TP_SRC(out, sf->value.be16); | |
2556 | break; | |
2557 | ||
2558 | case MFF_TCP_DST: | |
2559 | case MFF_UDP_DST: | |
2560 | put_OFPAT_SET_TP_DST(out, sf->value.be16); | |
2561 | break; | |
2562 | ||
2563 | default: | |
2564 | set_field_to_nxast(sf, out); | |
2565 | break; | |
7fdb60a7 SH |
2566 | } |
2567 | } | |
2568 | ||
7eb4b1f1 BP |
2569 | static void |
2570 | set_field_to_set_field(const struct ofpact_set_field *sf, | |
2571 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2572 | { | |
2573 | struct ofp12_action_set_field *oasf OVS_UNUSED; | |
6fd6ed71 | 2574 | size_t start_ofs = out->size; |
7eb4b1f1 BP |
2575 | |
2576 | oasf = put_OFPAT12_SET_FIELD(out); | |
6fd6ed71 | 2577 | out->size = out->size - sizeof oasf->pad; |
7eb4b1f1 BP |
2578 | nx_put_entry(out, sf->field->id, ofp_version, &sf->value, &sf->mask); |
2579 | pad_ofpat(out, start_ofs); | |
2580 | } | |
2581 | ||
c2d936a4 BP |
2582 | static void |
2583 | encode_SET_FIELD(const struct ofpact_set_field *sf, | |
2584 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2585 | { | |
7eb4b1f1 | 2586 | if (ofp_version >= OFP15_VERSION) { |
bad8a439 BP |
2587 | /* OF1.5+ only has Set-Field (reg_load is redundant so we drop it |
2588 | * entirely). */ | |
7eb4b1f1 | 2589 | set_field_to_set_field(sf, ofp_version, out); |
bad8a439 BP |
2590 | } else if (sf->ofpact.raw == NXAST_RAW_REG_LOAD || |
2591 | sf->ofpact.raw == NXAST_RAW_REG_LOAD2) { | |
2592 | /* It came in as reg_load, send it out the same way. */ | |
7eb4b1f1 BP |
2593 | set_field_to_nxast(sf, out); |
2594 | } else if (ofp_version < OFP12_VERSION) { | |
2595 | /* OpenFlow 1.0 and 1.1 don't have Set-Field. */ | |
c2d936a4 | 2596 | set_field_to_legacy_openflow(sf, ofp_version, out); |
7eb4b1f1 BP |
2597 | } else if (is_all_ones((const uint8_t *) &sf->mask, sf->field->n_bytes)) { |
2598 | /* We're encoding to OpenFlow 1.2, 1.3, or 1.4. The action sets an | |
2599 | * entire field, so encode it as OFPAT_SET_FIELD. */ | |
2600 | set_field_to_set_field(sf, ofp_version, out); | |
c2d936a4 | 2601 | } else { |
7eb4b1f1 BP |
2602 | /* We're encoding to OpenFlow 1.2, 1.3, or 1.4. The action cannot be |
2603 | * encoded as OFPAT_SET_FIELD because it does not set an entire field, | |
2604 | * so encode it as reg_load. */ | |
2605 | set_field_to_nxast(sf, out); | |
c2d936a4 BP |
2606 | } |
2607 | } | |
2608 | ||
36b43aa6 JS |
2609 | /* Parses the input argument 'arg' into the key, value, and delimiter |
2610 | * components that are common across the reg_load and set_field action format. | |
2611 | * | |
2612 | * With an argument like "1->metadata", sets the following pointers to | |
2613 | * point within 'arg': | |
2614 | * key: "metadata" | |
2615 | * value: "1" | |
2616 | * delim: "->" | |
2617 | * | |
2618 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2619 | * error. The caller is responsible for freeing the returned string. */ | |
2620 | static char * OVS_WARN_UNUSED_RESULT | |
2621 | set_field_split_str(char *arg, char **key, char **value, char **delim) | |
2622 | { | |
2623 | char *value_end; | |
2624 | ||
2625 | *value = arg; | |
2626 | value_end = strstr(arg, "->"); | |
2627 | *key = value_end + strlen("->"); | |
2628 | if (delim) { | |
2629 | *delim = value_end; | |
2630 | } | |
2631 | ||
2632 | if (!value_end) { | |
2633 | return xasprintf("%s: missing `->'", arg); | |
2634 | } | |
2635 | if (strlen(value_end) <= strlen("->")) { | |
2636 | return xasprintf("%s: missing field name following `->'", arg); | |
2637 | } | |
2638 | ||
2639 | return NULL; | |
2640 | } | |
2641 | ||
c2d936a4 BP |
2642 | /* Parses a "set_field" action with argument 'arg', appending the parsed |
2643 | * action to 'ofpacts'. | |
2644 | * | |
2645 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2646 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 2647 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2648 | set_field_parse__(char *arg, struct ofpbuf *ofpacts, |
2649 | enum ofputil_protocol *usable_protocols) | |
7fdb60a7 | 2650 | { |
c2d936a4 BP |
2651 | struct ofpact_set_field *sf = ofpact_put_SET_FIELD(ofpacts); |
2652 | char *value; | |
2653 | char *delim; | |
2654 | char *key; | |
2655 | const struct mf_field *mf; | |
2656 | char *error; | |
7fdb60a7 | 2657 | |
36b43aa6 JS |
2658 | error = set_field_split_str(arg, &key, &value, &delim); |
2659 | if (error) { | |
2660 | return error; | |
c2d936a4 | 2661 | } |
e3f8f887 | 2662 | |
c2d936a4 BP |
2663 | mf = mf_from_name(key); |
2664 | if (!mf) { | |
2665 | return xasprintf("%s is not a valid OXM field name", key); | |
2666 | } | |
2667 | if (!mf->writable) { | |
2668 | return xasprintf("%s is read-only", key); | |
2669 | } | |
2670 | sf->field = mf; | |
2671 | delim[0] = '\0'; | |
7eb4b1f1 | 2672 | error = mf_parse(mf, value, &sf->value, &sf->mask); |
7fdb60a7 SH |
2673 | if (error) { |
2674 | return error; | |
2675 | } | |
2676 | ||
c2d936a4 BP |
2677 | if (!mf_is_value_valid(mf, &sf->value)) { |
2678 | return xasprintf("%s is not a valid value for field %s", value, key); | |
7fdb60a7 SH |
2679 | } |
2680 | ||
a4ce8b25 | 2681 | *usable_protocols &= mf->usable_protocols_exact; |
c2d936a4 | 2682 | return NULL; |
7fdb60a7 SH |
2683 | } |
2684 | ||
c2d936a4 BP |
2685 | /* Parses 'arg' as the argument to a "set_field" action, and appends such an |
2686 | * action to 'ofpacts'. | |
2687 | * | |
2688 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2689 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 2690 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2691 | parse_SET_FIELD(const char *arg, struct ofpbuf *ofpacts, |
2692 | enum ofputil_protocol *usable_protocols) | |
2693 | { | |
2694 | char *copy = xstrdup(arg); | |
2695 | char *error = set_field_parse__(copy, ofpacts, usable_protocols); | |
2696 | free(copy); | |
2697 | return error; | |
2698 | } | |
a359d5ad | 2699 | |
cab50449 | 2700 | static char * OVS_WARN_UNUSED_RESULT |
7eb4b1f1 BP |
2701 | parse_reg_load(char *arg, struct ofpbuf *ofpacts) |
2702 | { | |
2703 | struct ofpact_set_field *sf = ofpact_put_reg_load(ofpacts); | |
7eb4b1f1 | 2704 | struct mf_subfield dst; |
36b43aa6 | 2705 | char *key, *value_str; |
81270993 | 2706 | union mf_value value; |
7eb4b1f1 BP |
2707 | char *error; |
2708 | ||
36b43aa6 JS |
2709 | error = set_field_split_str(arg, &key, &value_str, NULL); |
2710 | if (error) { | |
2711 | return error; | |
7eb4b1f1 | 2712 | } |
36b43aa6 JS |
2713 | |
2714 | error = mf_parse_subfield(&dst, key); | |
7eb4b1f1 BP |
2715 | if (error) { |
2716 | return error; | |
2717 | } | |
2718 | ||
81270993 JS |
2719 | if (parse_int_string(value_str, (uint8_t *)&value, dst.field->n_bytes, |
2720 | &key)) { | |
2721 | return xasprintf("%s: cannot parse integer value", arg); | |
2722 | } | |
2723 | ||
2724 | if (!bitwise_is_all_zeros(&value, dst.field->n_bytes, dst.n_bits, | |
2725 | dst.field->n_bytes * 8 - dst.n_bits)) { | |
2726 | struct ds ds; | |
2727 | ||
2728 | ds_init(&ds); | |
2729 | mf_format(dst.field, &value, NULL, &ds); | |
2730 | error = xasprintf("%s: value %s does not fit into %d bits", | |
2731 | arg, ds_cstr(&ds), dst.n_bits); | |
2732 | ds_destroy(&ds); | |
2733 | return error; | |
7eb4b1f1 BP |
2734 | } |
2735 | ||
2736 | sf->field = dst.field; | |
2737 | memset(&sf->value, 0, sizeof sf->value); | |
81270993 JS |
2738 | bitwise_copy(&value, dst.field->n_bytes, 0, &sf->value, |
2739 | dst.field->n_bytes, dst.ofs, dst.n_bits); | |
2740 | bitwise_one(&sf->mask, dst.field->n_bytes, dst.ofs, dst.n_bits); | |
2741 | ||
7eb4b1f1 BP |
2742 | return NULL; |
2743 | } | |
2744 | ||
c2d936a4 BP |
2745 | static void |
2746 | format_SET_FIELD(const struct ofpact_set_field *a, struct ds *s) | |
2747 | { | |
7eb4b1f1 BP |
2748 | if (a->ofpact.raw == NXAST_RAW_REG_LOAD) { |
2749 | struct mf_subfield dst; | |
2750 | uint64_t value; | |
2751 | ||
2752 | dst.ofs = dst.n_bits = 0; | |
2753 | while (next_load_segment(a, &dst, &value)) { | |
2754 | ds_put_format(s, "load:%#"PRIx64"->", value); | |
2755 | mf_format_subfield(&dst, s); | |
2756 | ds_put_char(s, ','); | |
2757 | } | |
2758 | ds_chomp(s, ','); | |
2759 | } else { | |
2760 | ds_put_cstr(s, "set_field:"); | |
2761 | mf_format(a->field, &a->value, &a->mask, s); | |
2762 | ds_put_format(s, "->%s", a->field->name); | |
2763 | } | |
2764 | } | |
2765 | ||
2766 | /* Appends an OFPACT_SET_FIELD ofpact to 'ofpacts' and returns it. The ofpact | |
2767 | * is marked such that, if possible, it will be translated to OpenFlow as | |
2768 | * NXAST_REG_LOAD extension actions rather than OFPAT_SET_FIELD, either because | |
2769 | * that was the way that the action was expressed when it came into OVS or for | |
2770 | * backward compatibility. */ | |
2771 | struct ofpact_set_field * | |
2772 | ofpact_put_reg_load(struct ofpbuf *ofpacts) | |
2773 | { | |
2774 | struct ofpact_set_field *sf = ofpact_put_SET_FIELD(ofpacts); | |
2775 | sf->ofpact.raw = NXAST_RAW_REG_LOAD; | |
2776 | return sf; | |
c2d936a4 BP |
2777 | } |
2778 | \f | |
2779 | /* Action structure for NXAST_STACK_PUSH and NXAST_STACK_POP. | |
2780 | * | |
2781 | * Pushes (or pops) field[offset: offset + n_bits] to (or from) | |
2782 | * top of the stack. | |
2783 | */ | |
2784 | struct nx_action_stack { | |
2785 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2786 | ovs_be16 len; /* Length is 16. */ | |
2787 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2788 | ovs_be16 subtype; /* NXAST_STACK_PUSH or NXAST_STACK_POP. */ | |
2789 | ovs_be16 offset; /* Bit offset into the field. */ | |
bad8a439 BP |
2790 | /* Followed by: |
2791 | * - OXM/NXM header for field to push or pop (4 or 8 bytes). | |
2792 | * - ovs_be16 'n_bits', the number of bits to extract from the field. | |
2793 | * - Enough 0-bytes to pad out the action to 24 bytes. */ | |
2794 | uint8_t pad[12]; /* See above. */ | |
a359d5ad | 2795 | }; |
c2d936a4 | 2796 | OFP_ASSERT(sizeof(struct nx_action_stack) == 24); |
a359d5ad | 2797 | |
bad8a439 | 2798 | static enum ofperr |
c2d936a4 BP |
2799 | decode_stack_action(const struct nx_action_stack *nasp, |
2800 | struct ofpact_stack *stack_action) | |
a359d5ad | 2801 | { |
bad8a439 BP |
2802 | enum ofperr error; |
2803 | struct ofpbuf b; | |
2804 | ||
c2d936a4 | 2805 | stack_action->subfield.ofs = ntohs(nasp->offset); |
bad8a439 BP |
2806 | |
2807 | ofpbuf_use_const(&b, nasp, sizeof *nasp); | |
2808 | ofpbuf_pull(&b, OBJECT_OFFSETOF(nasp, pad)); | |
2809 | error = nx_pull_header(&b, &stack_action->subfield.field, NULL); | |
2810 | if (error) { | |
2811 | return error; | |
2812 | } | |
6fd6ed71 | 2813 | stack_action->subfield.n_bits = ntohs(*(const ovs_be16 *) b.data); |
bad8a439 | 2814 | ofpbuf_pull(&b, 2); |
6fd6ed71 | 2815 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2816 | return OFPERR_NXBRC_MUST_BE_ZERO; |
2817 | } | |
2818 | ||
2819 | return 0; | |
a359d5ad IY |
2820 | } |
2821 | ||
c2d936a4 BP |
2822 | static enum ofperr |
2823 | decode_NXAST_RAW_STACK_PUSH(const struct nx_action_stack *nasp, | |
f3cd3ac7 JS |
2824 | enum ofp_version ofp_version OVS_UNUSED, |
2825 | struct ofpbuf *ofpacts) | |
a359d5ad | 2826 | { |
c2d936a4 | 2827 | struct ofpact_stack *push = ofpact_put_STACK_PUSH(ofpacts); |
bad8a439 BP |
2828 | enum ofperr error = decode_stack_action(nasp, push); |
2829 | return error ? error : nxm_stack_push_check(push, NULL); | |
a359d5ad IY |
2830 | } |
2831 | ||
c2d936a4 BP |
2832 | static enum ofperr |
2833 | decode_NXAST_RAW_STACK_POP(const struct nx_action_stack *nasp, | |
f3cd3ac7 | 2834 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 2835 | struct ofpbuf *ofpacts) |
084c53de | 2836 | { |
c2d936a4 | 2837 | struct ofpact_stack *pop = ofpact_put_STACK_POP(ofpacts); |
bad8a439 BP |
2838 | enum ofperr error = decode_stack_action(nasp, pop); |
2839 | return error ? error : nxm_stack_pop_check(pop, NULL); | |
084c53de BP |
2840 | } |
2841 | ||
c2d936a4 BP |
2842 | static void |
2843 | encode_STACK_op(const struct ofpact_stack *stack_action, | |
2844 | struct nx_action_stack *nasp) | |
c0621c39 | 2845 | { |
bad8a439 BP |
2846 | struct ofpbuf b; |
2847 | ovs_be16 n_bits; | |
2848 | ||
c2d936a4 | 2849 | nasp->offset = htons(stack_action->subfield.ofs); |
bad8a439 BP |
2850 | |
2851 | ofpbuf_use_stack(&b, nasp, ntohs(nasp->len)); | |
2852 | ofpbuf_put_uninit(&b, OBJECT_OFFSETOF(nasp, pad)); | |
2853 | nx_put_header(&b, stack_action->subfield.field->id, 0, false); | |
2854 | n_bits = htons(stack_action->subfield.n_bits); | |
2855 | ofpbuf_put(&b, &n_bits, sizeof n_bits); | |
c0621c39 AW |
2856 | } |
2857 | ||
c2d936a4 BP |
2858 | static void |
2859 | encode_STACK_PUSH(const struct ofpact_stack *stack, | |
2860 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
2861 | { | |
2862 | encode_STACK_op(stack, put_NXAST_STACK_PUSH(out)); | |
2863 | } | |
8e97815e | 2864 | |
c2d936a4 BP |
2865 | static void |
2866 | encode_STACK_POP(const struct ofpact_stack *stack, | |
2867 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
8e97815e | 2868 | { |
c2d936a4 BP |
2869 | encode_STACK_op(stack, put_NXAST_STACK_POP(out)); |
2870 | } | |
8e97815e | 2871 | |
cab50449 | 2872 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2873 | parse_STACK_PUSH(char *arg, struct ofpbuf *ofpacts, |
2874 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2875 | { | |
2876 | return nxm_parse_stack_action(ofpact_put_STACK_PUSH(ofpacts), arg); | |
2877 | } | |
8e97815e | 2878 | |
cab50449 | 2879 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2880 | parse_STACK_POP(char *arg, struct ofpbuf *ofpacts, |
2881 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2882 | { | |
2883 | return nxm_parse_stack_action(ofpact_put_STACK_POP(ofpacts), arg); | |
8e97815e BP |
2884 | } |
2885 | ||
c2d936a4 BP |
2886 | static void |
2887 | format_STACK_PUSH(const struct ofpact_stack *a, struct ds *s) | |
8e97815e | 2888 | { |
c2d936a4 BP |
2889 | nxm_format_stack_push(a, s); |
2890 | } | |
8e97815e | 2891 | |
c2d936a4 BP |
2892 | static void |
2893 | format_STACK_POP(const struct ofpact_stack *a, struct ds *s) | |
2894 | { | |
2895 | nxm_format_stack_pop(a, s); | |
2896 | } | |
2897 | \f | |
2898 | /* Action structure for NXAST_DEC_TTL_CNT_IDS. | |
2899 | * | |
2900 | * If the packet is not IPv4 or IPv6, does nothing. For IPv4 or IPv6, if the | |
2901 | * TTL or hop limit is at least 2, decrements it by 1. Otherwise, if TTL or | |
2902 | * hop limit is 0 or 1, sends a packet-in to the controllers with each of the | |
2903 | * 'n_controllers' controller IDs specified in 'cnt_ids'. | |
2904 | * | |
2905 | * (This differs from NXAST_DEC_TTL in that for NXAST_DEC_TTL the packet-in is | |
2906 | * sent only to controllers with id 0.) | |
2907 | */ | |
2908 | struct nx_action_cnt_ids { | |
2909 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2910 | ovs_be16 len; /* Length including slaves. */ | |
2911 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2912 | ovs_be16 subtype; /* NXAST_DEC_TTL_CNT_IDS. */ | |
2913 | ||
2914 | ovs_be16 n_controllers; /* Number of controllers. */ | |
2915 | uint8_t zeros[4]; /* Must be zero. */ | |
2916 | ||
2917 | /* Followed by 1 or more controller ids. | |
2918 | * | |
2919 | * uint16_t cnt_ids[]; // Controller ids. | |
2920 | * uint8_t pad[]; // Must be 0 to 8-byte align cnt_ids[]. | |
2921 | */ | |
2922 | }; | |
2923 | OFP_ASSERT(sizeof(struct nx_action_cnt_ids) == 16); | |
2924 | ||
2925 | static enum ofperr | |
2926 | decode_OFPAT_RAW_DEC_NW_TTL(struct ofpbuf *out) | |
2927 | { | |
2928 | uint16_t id = 0; | |
2929 | struct ofpact_cnt_ids *ids; | |
2930 | enum ofperr error = 0; | |
2931 | ||
2932 | ids = ofpact_put_DEC_TTL(out); | |
2933 | ids->n_controllers = 1; | |
2934 | ofpbuf_put(out, &id, sizeof id); | |
6fd6ed71 | 2935 | ids = out->header; |
34abaa3d | 2936 | ofpact_finish(out, &ids->ofpact); |
c2d936a4 BP |
2937 | return error; |
2938 | } | |
2939 | ||
2940 | static enum ofperr | |
2941 | decode_NXAST_RAW_DEC_TTL_CNT_IDS(const struct nx_action_cnt_ids *nac_ids, | |
f3cd3ac7 | 2942 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
2943 | struct ofpbuf *out) |
2944 | { | |
2945 | struct ofpact_cnt_ids *ids; | |
2946 | size_t ids_size; | |
2947 | int i; | |
2948 | ||
2949 | ids = ofpact_put_DEC_TTL(out); | |
2950 | ids->ofpact.raw = NXAST_RAW_DEC_TTL_CNT_IDS; | |
2951 | ids->n_controllers = ntohs(nac_ids->n_controllers); | |
2952 | ids_size = ntohs(nac_ids->len) - sizeof *nac_ids; | |
2953 | ||
2954 | if (!is_all_zeros(nac_ids->zeros, sizeof nac_ids->zeros)) { | |
2955 | return OFPERR_NXBRC_MUST_BE_ZERO; | |
8e97815e | 2956 | } |
c2d936a4 BP |
2957 | |
2958 | if (ids_size < ids->n_controllers * sizeof(ovs_be16)) { | |
2959 | VLOG_WARN_RL(&rl, "Nicira action dec_ttl_cnt_ids only has %"PRIuSIZE" " | |
2960 | "bytes allocated for controller ids. %"PRIuSIZE" bytes " | |
2961 | "are required for %"PRIu16" controllers.", | |
2962 | ids_size, ids->n_controllers * sizeof(ovs_be16), | |
2963 | ids->n_controllers); | |
2964 | return OFPERR_OFPBAC_BAD_LEN; | |
2965 | } | |
2966 | ||
2967 | for (i = 0; i < ids->n_controllers; i++) { | |
2968 | uint16_t id = ntohs(((ovs_be16 *)(nac_ids + 1))[i]); | |
2969 | ofpbuf_put(out, &id, sizeof id); | |
6fd6ed71 | 2970 | ids = out->header; |
c2d936a4 BP |
2971 | } |
2972 | ||
34abaa3d | 2973 | ofpact_finish(out, &ids->ofpact); |
c2d936a4 BP |
2974 | |
2975 | return 0; | |
8e97815e BP |
2976 | } |
2977 | ||
c2d936a4 BP |
2978 | static void |
2979 | encode_DEC_TTL(const struct ofpact_cnt_ids *dec_ttl, | |
2980 | enum ofp_version ofp_version, struct ofpbuf *out) | |
8e97815e | 2981 | { |
c2d936a4 BP |
2982 | if (dec_ttl->ofpact.raw == NXAST_RAW_DEC_TTL_CNT_IDS |
2983 | || dec_ttl->n_controllers != 1 | |
2984 | || dec_ttl->cnt_ids[0] != 0) { | |
2985 | struct nx_action_cnt_ids *nac_ids = put_NXAST_DEC_TTL_CNT_IDS(out); | |
2986 | int ids_len = ROUND_UP(2 * dec_ttl->n_controllers, OFP_ACTION_ALIGN); | |
2987 | ovs_be16 *ids; | |
2988 | size_t i; | |
8e97815e | 2989 | |
c2d936a4 BP |
2990 | nac_ids->len = htons(ntohs(nac_ids->len) + ids_len); |
2991 | nac_ids->n_controllers = htons(dec_ttl->n_controllers); | |
2992 | ||
2993 | ids = ofpbuf_put_zeros(out, ids_len); | |
2994 | for (i = 0; i < dec_ttl->n_controllers; i++) { | |
2995 | ids[i] = htons(dec_ttl->cnt_ids[i]); | |
8e97815e | 2996 | } |
c2d936a4 BP |
2997 | } else { |
2998 | put_OFPAT_DEC_NW_TTL(out, ofp_version); | |
8e97815e | 2999 | } |
8e97815e BP |
3000 | } |
3001 | ||
c2d936a4 BP |
3002 | static void |
3003 | parse_noargs_dec_ttl(struct ofpbuf *ofpacts) | |
d01c980f | 3004 | { |
c2d936a4 BP |
3005 | struct ofpact_cnt_ids *ids; |
3006 | uint16_t id = 0; | |
3007 | ||
3008 | ofpact_put_DEC_TTL(ofpacts); | |
3009 | ofpbuf_put(ofpacts, &id, sizeof id); | |
6fd6ed71 | 3010 | ids = ofpacts->header; |
c2d936a4 | 3011 | ids->n_controllers++; |
34abaa3d | 3012 | ofpact_finish(ofpacts, &ids->ofpact); |
d01c980f BP |
3013 | } |
3014 | ||
cab50449 | 3015 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3016 | parse_DEC_TTL(char *arg, struct ofpbuf *ofpacts, |
3017 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
d01c980f | 3018 | { |
c2d936a4 BP |
3019 | if (*arg == '\0') { |
3020 | parse_noargs_dec_ttl(ofpacts); | |
3021 | } else { | |
3022 | struct ofpact_cnt_ids *ids; | |
3023 | char *cntr; | |
3024 | ||
3025 | ids = ofpact_put_DEC_TTL(ofpacts); | |
3026 | ids->ofpact.raw = NXAST_RAW_DEC_TTL_CNT_IDS; | |
3027 | for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL; | |
3028 | cntr = strtok_r(NULL, ", ", &arg)) { | |
3029 | uint16_t id = atoi(cntr); | |
3030 | ||
3031 | ofpbuf_put(ofpacts, &id, sizeof id); | |
6fd6ed71 | 3032 | ids = ofpacts->header; |
c2d936a4 BP |
3033 | ids->n_controllers++; |
3034 | } | |
3035 | if (!ids->n_controllers) { | |
3036 | return xstrdup("dec_ttl_cnt_ids: expected at least one controller " | |
3037 | "id."); | |
3038 | } | |
34abaa3d | 3039 | ofpact_finish(ofpacts, &ids->ofpact); |
c2d936a4 BP |
3040 | } |
3041 | return NULL; | |
d01c980f BP |
3042 | } |
3043 | ||
c2d936a4 BP |
3044 | static void |
3045 | format_DEC_TTL(const struct ofpact_cnt_ids *a, struct ds *s) | |
d01c980f | 3046 | { |
c2d936a4 | 3047 | size_t i; |
d01c980f | 3048 | |
c2d936a4 BP |
3049 | ds_put_cstr(s, "dec_ttl"); |
3050 | if (a->ofpact.raw == NXAST_RAW_DEC_TTL_CNT_IDS) { | |
3051 | ds_put_cstr(s, "("); | |
3052 | for (i = 0; i < a->n_controllers; i++) { | |
3053 | if (i) { | |
3054 | ds_put_cstr(s, ","); | |
d01c980f | 3055 | } |
c2d936a4 BP |
3056 | ds_put_format(s, "%"PRIu16, a->cnt_ids[i]); |
3057 | } | |
3058 | ds_put_cstr(s, ")"); | |
d01c980f BP |
3059 | } |
3060 | } | |
c2d936a4 BP |
3061 | \f |
3062 | /* Set MPLS label actions. */ | |
d01c980f BP |
3063 | |
3064 | static enum ofperr | |
f3cd3ac7 JS |
3065 | decode_OFPAT_RAW_SET_MPLS_LABEL(ovs_be32 label, |
3066 | enum ofp_version ofp_version OVS_UNUSED, | |
3067 | struct ofpbuf *out) | |
d01c980f | 3068 | { |
c2d936a4 BP |
3069 | ofpact_put_SET_MPLS_LABEL(out)->label = label; |
3070 | return 0; | |
3071 | } | |
d01c980f | 3072 | |
c2d936a4 BP |
3073 | static void |
3074 | encode_SET_MPLS_LABEL(const struct ofpact_mpls_label *label, | |
3075 | enum ofp_version ofp_version, | |
3076 | struct ofpbuf *out) | |
3077 | { | |
3078 | if (ofp_version < OFP12_VERSION) { | |
3079 | put_OFPAT_SET_MPLS_LABEL(out, ofp_version, label->label); | |
3080 | } else { | |
3081 | ofpact_put_set_field(out, ofp_version, MFF_MPLS_LABEL, | |
3082 | ntohl(label->label)); | |
d01c980f | 3083 | } |
c2d936a4 | 3084 | } |
d01c980f | 3085 | |
cab50449 | 3086 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3087 | parse_SET_MPLS_LABEL(char *arg, struct ofpbuf *ofpacts, |
3088 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3089 | { | |
3090 | struct ofpact_mpls_label *mpls_label = ofpact_put_SET_MPLS_LABEL(ofpacts); | |
3091 | if (*arg == '\0') { | |
3092 | return xstrdup("set_mpls_label: expected label."); | |
d01c980f | 3093 | } |
c2d936a4 BP |
3094 | |
3095 | mpls_label->label = htonl(atoi(arg)); | |
3096 | return NULL; | |
d01c980f BP |
3097 | } |
3098 | ||
3099 | static void | |
c2d936a4 | 3100 | format_SET_MPLS_LABEL(const struct ofpact_mpls_label *a, struct ds *s) |
d01c980f | 3101 | { |
c2d936a4 | 3102 | ds_put_format(s, "set_mpls_label(%"PRIu32")", ntohl(a->label)); |
d01c980f | 3103 | } |
c2d936a4 BP |
3104 | \f |
3105 | /* Set MPLS TC actions. */ | |
d01c980f | 3106 | |
c2d936a4 | 3107 | static enum ofperr |
f3cd3ac7 JS |
3108 | decode_OFPAT_RAW_SET_MPLS_TC(uint8_t tc, |
3109 | enum ofp_version ofp_version OVS_UNUSED, | |
3110 | struct ofpbuf *out) | |
d01c980f | 3111 | { |
c2d936a4 BP |
3112 | ofpact_put_SET_MPLS_TC(out)->tc = tc; |
3113 | return 0; | |
3114 | } | |
d01c980f | 3115 | |
c2d936a4 BP |
3116 | static void |
3117 | encode_SET_MPLS_TC(const struct ofpact_mpls_tc *tc, | |
3118 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3119 | { | |
3120 | if (ofp_version < OFP12_VERSION) { | |
3121 | put_OFPAT_SET_MPLS_TC(out, ofp_version, tc->tc); | |
3122 | } else { | |
3123 | ofpact_put_set_field(out, ofp_version, MFF_MPLS_TC, tc->tc); | |
8f2cded4 | 3124 | } |
c2d936a4 | 3125 | } |
8f2cded4 | 3126 | |
cab50449 | 3127 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3128 | parse_SET_MPLS_TC(char *arg, struct ofpbuf *ofpacts, |
3129 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3130 | { | |
3131 | struct ofpact_mpls_tc *mpls_tc = ofpact_put_SET_MPLS_TC(ofpacts); | |
d01c980f | 3132 | |
c2d936a4 BP |
3133 | if (*arg == '\0') { |
3134 | return xstrdup("set_mpls_tc: expected tc."); | |
d01c980f BP |
3135 | } |
3136 | ||
c2d936a4 BP |
3137 | mpls_tc->tc = atoi(arg); |
3138 | return NULL; | |
3139 | } | |
d01c980f | 3140 | |
c2d936a4 BP |
3141 | static void |
3142 | format_SET_MPLS_TC(const struct ofpact_mpls_tc *a, struct ds *s) | |
3143 | { | |
3144 | ds_put_format(s, "set_mpls_ttl(%"PRIu8")", a->tc); | |
3145 | } | |
3146 | \f | |
3147 | /* Set MPLS TTL actions. */ | |
d01c980f | 3148 | |
c2d936a4 | 3149 | static enum ofperr |
f3cd3ac7 JS |
3150 | decode_OFPAT_RAW_SET_MPLS_TTL(uint8_t ttl, |
3151 | enum ofp_version ofp_version OVS_UNUSED, | |
3152 | struct ofpbuf *out) | |
c2d936a4 BP |
3153 | { |
3154 | ofpact_put_SET_MPLS_TTL(out)->ttl = ttl; | |
3155 | return 0; | |
3156 | } | |
638a19b0 | 3157 | |
c2d936a4 BP |
3158 | static void |
3159 | encode_SET_MPLS_TTL(const struct ofpact_mpls_ttl *ttl, | |
3160 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3161 | { | |
3162 | put_OFPAT_SET_MPLS_TTL(out, ofp_version, ttl->ttl); | |
3163 | } | |
638a19b0 | 3164 | |
c2d936a4 BP |
3165 | /* Parses 'arg' as the argument to a "set_mpls_ttl" action, and appends such an |
3166 | * action to 'ofpacts'. | |
3167 | * | |
3168 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
3169 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 3170 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3171 | parse_SET_MPLS_TTL(char *arg, struct ofpbuf *ofpacts, |
3172 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3173 | { | |
3174 | struct ofpact_mpls_ttl *mpls_ttl = ofpact_put_SET_MPLS_TTL(ofpacts); | |
d01c980f | 3175 | |
c2d936a4 BP |
3176 | if (*arg == '\0') { |
3177 | return xstrdup("set_mpls_ttl: expected ttl."); | |
b19e8793 | 3178 | } |
7fdb60a7 | 3179 | |
c2d936a4 BP |
3180 | mpls_ttl->ttl = atoi(arg); |
3181 | return NULL; | |
3182 | } | |
4cceacb9 | 3183 | |
c2d936a4 BP |
3184 | static void |
3185 | format_SET_MPLS_TTL(const struct ofpact_mpls_ttl *a, struct ds *s) | |
3186 | { | |
3187 | ds_put_format(s, "set_mpls_ttl(%"PRIu8")", a->ttl); | |
3188 | } | |
3189 | \f | |
3190 | /* Decrement MPLS TTL actions. */ | |
4cceacb9 | 3191 | |
c2d936a4 BP |
3192 | static enum ofperr |
3193 | decode_OFPAT_RAW_DEC_MPLS_TTL(struct ofpbuf *out) | |
3194 | { | |
3195 | ofpact_put_DEC_MPLS_TTL(out); | |
3196 | return 0; | |
3197 | } | |
8dd54666 | 3198 | |
c2d936a4 BP |
3199 | static void |
3200 | encode_DEC_MPLS_TTL(const struct ofpact_null *null OVS_UNUSED, | |
3201 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3202 | { | |
3203 | put_OFPAT_DEC_MPLS_TTL(out, ofp_version); | |
3204 | } | |
3205 | ||
cab50449 | 3206 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3207 | parse_DEC_MPLS_TTL(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
3208 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3209 | { | |
3210 | ofpact_put_DEC_MPLS_TTL(ofpacts); | |
3211 | return NULL; | |
3212 | } | |
3213 | ||
3214 | static void | |
3215 | format_DEC_MPLS_TTL(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
3216 | { | |
3217 | ds_put_cstr(s, "dec_mpls_ttl"); | |
3218 | } | |
3219 | \f | |
3220 | /* Push MPLS label action. */ | |
3221 | ||
3222 | static enum ofperr | |
f3cd3ac7 JS |
3223 | decode_OFPAT_RAW_PUSH_MPLS(ovs_be16 ethertype, |
3224 | enum ofp_version ofp_version OVS_UNUSED, | |
3225 | struct ofpbuf *out) | |
c2d936a4 BP |
3226 | { |
3227 | struct ofpact_push_mpls *oam; | |
3228 | ||
3229 | if (!eth_type_mpls(ethertype)) { | |
3230 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
8dd54666 | 3231 | } |
c2d936a4 BP |
3232 | oam = ofpact_put_PUSH_MPLS(out); |
3233 | oam->ethertype = ethertype; | |
d01c980f | 3234 | |
c2d936a4 BP |
3235 | return 0; |
3236 | } | |
3237 | ||
3238 | static void | |
3239 | encode_PUSH_MPLS(const struct ofpact_push_mpls *push_mpls, | |
3240 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3241 | { | |
3242 | put_OFPAT_PUSH_MPLS(out, ofp_version, push_mpls->ethertype); | |
3243 | } | |
3244 | ||
cab50449 | 3245 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3246 | parse_PUSH_MPLS(char *arg, struct ofpbuf *ofpacts, |
3247 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3248 | { | |
3249 | uint16_t ethertype; | |
3250 | char *error; | |
3251 | ||
3252 | error = str_to_u16(arg, "push_mpls", ðertype); | |
3253 | if (!error) { | |
3254 | ofpact_put_PUSH_MPLS(ofpacts)->ethertype = htons(ethertype); | |
d01c980f BP |
3255 | } |
3256 | return error; | |
3257 | } | |
c2d936a4 BP |
3258 | |
3259 | static void | |
3260 | format_PUSH_MPLS(const struct ofpact_push_mpls *a, struct ds *s) | |
3261 | { | |
3262 | ds_put_format(s, "push_mpls:0x%04"PRIx16, ntohs(a->ethertype)); | |
3263 | } | |
d01c980f | 3264 | \f |
c2d936a4 BP |
3265 | /* Pop MPLS label action. */ |
3266 | ||
3267 | static enum ofperr | |
f3cd3ac7 JS |
3268 | decode_OFPAT_RAW_POP_MPLS(ovs_be16 ethertype, |
3269 | enum ofp_version ofp_version OVS_UNUSED, | |
3270 | struct ofpbuf *out) | |
57ad4e9e | 3271 | { |
c2d936a4 BP |
3272 | ofpact_put_POP_MPLS(out)->ethertype = ethertype; |
3273 | return 0; | |
3274 | } | |
57ad4e9e | 3275 | |
c2d936a4 BP |
3276 | static void |
3277 | encode_POP_MPLS(const struct ofpact_pop_mpls *pop_mpls, | |
3278 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3279 | { | |
3280 | put_OFPAT_POP_MPLS(out, ofp_version, pop_mpls->ethertype); | |
3281 | } | |
3282 | ||
cab50449 | 3283 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3284 | parse_POP_MPLS(char *arg, struct ofpbuf *ofpacts, |
3285 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3286 | { | |
3287 | uint16_t ethertype; | |
3288 | char *error; | |
3289 | ||
3290 | error = str_to_u16(arg, "pop_mpls", ðertype); | |
3291 | if (!error) { | |
3292 | ofpact_put_POP_MPLS(ofpacts)->ethertype = htons(ethertype); | |
57ad4e9e | 3293 | } |
c2d936a4 | 3294 | return error; |
57ad4e9e BP |
3295 | } |
3296 | ||
ba2fe8e9 | 3297 | static void |
c2d936a4 | 3298 | format_POP_MPLS(const struct ofpact_pop_mpls *a, struct ds *s) |
ba2fe8e9 | 3299 | { |
c2d936a4 | 3300 | ds_put_format(s, "pop_mpls:0x%04"PRIx16, ntohs(a->ethertype)); |
ba2fe8e9 | 3301 | } |
c2d936a4 BP |
3302 | \f |
3303 | /* Set tunnel ID actions. */ | |
ba2fe8e9 | 3304 | |
f25d0cf3 | 3305 | static enum ofperr |
f3cd3ac7 JS |
3306 | decode_NXAST_RAW_SET_TUNNEL(uint32_t tun_id, |
3307 | enum ofp_version ofp_version OVS_UNUSED, | |
3308 | struct ofpbuf *out) | |
f25d0cf3 | 3309 | { |
c2d936a4 BP |
3310 | struct ofpact_tunnel *tunnel = ofpact_put_SET_TUNNEL(out); |
3311 | tunnel->ofpact.raw = NXAST_RAW_SET_TUNNEL; | |
3312 | tunnel->tun_id = tun_id; | |
3313 | return 0; | |
3314 | } | |
f25d0cf3 | 3315 | |
c2d936a4 | 3316 | static enum ofperr |
f3cd3ac7 JS |
3317 | decode_NXAST_RAW_SET_TUNNEL64(uint64_t tun_id, |
3318 | enum ofp_version ofp_version OVS_UNUSED, | |
3319 | struct ofpbuf *out) | |
c2d936a4 BP |
3320 | { |
3321 | struct ofpact_tunnel *tunnel = ofpact_put_SET_TUNNEL(out); | |
3322 | tunnel->ofpact.raw = NXAST_RAW_SET_TUNNEL64; | |
3323 | tunnel->tun_id = tun_id; | |
3324 | return 0; | |
3325 | } | |
f25d0cf3 | 3326 | |
c2d936a4 BP |
3327 | static void |
3328 | encode_SET_TUNNEL(const struct ofpact_tunnel *tunnel, | |
3329 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3330 | { | |
3331 | uint64_t tun_id = tunnel->tun_id; | |
f25d0cf3 | 3332 | |
c2d936a4 BP |
3333 | if (ofp_version < OFP12_VERSION) { |
3334 | if (tun_id <= UINT32_MAX | |
3335 | && tunnel->ofpact.raw != NXAST_RAW_SET_TUNNEL64) { | |
3336 | put_NXAST_SET_TUNNEL(out, tun_id); | |
3337 | } else { | |
3338 | put_NXAST_SET_TUNNEL64(out, tun_id); | |
f25d0cf3 | 3339 | } |
c2d936a4 BP |
3340 | } else { |
3341 | ofpact_put_set_field(out, ofp_version, MFF_TUN_ID, tun_id); | |
3342 | } | |
3343 | } | |
f25d0cf3 | 3344 | |
cab50449 | 3345 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3346 | parse_set_tunnel(char *arg, struct ofpbuf *ofpacts, |
3347 | enum ofp_raw_action_type raw) | |
3348 | { | |
3349 | struct ofpact_tunnel *tunnel; | |
ca287d20 | 3350 | |
c2d936a4 BP |
3351 | tunnel = ofpact_put_SET_TUNNEL(ofpacts); |
3352 | tunnel->ofpact.raw = raw; | |
3353 | return str_to_u64(arg, &tunnel->tun_id); | |
3354 | } | |
8621547c | 3355 | |
cab50449 | 3356 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3357 | parse_SET_TUNNEL(char *arg, struct ofpbuf *ofpacts, |
3358 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3359 | { | |
3360 | return parse_set_tunnel(arg, ofpacts, NXAST_RAW_SET_TUNNEL); | |
3361 | } | |
8621547c | 3362 | |
c2d936a4 BP |
3363 | static void |
3364 | format_SET_TUNNEL(const struct ofpact_tunnel *a, struct ds *s) | |
3365 | { | |
3366 | ds_put_format(s, "set_tunnel%s:%#"PRIx64, | |
3367 | (a->tun_id > UINT32_MAX | |
3368 | || a->ofpact.raw == NXAST_RAW_SET_TUNNEL64 ? "64" : ""), | |
3369 | a->tun_id); | |
3370 | } | |
3371 | \f | |
3372 | /* Set queue action. */ | |
8621547c | 3373 | |
c2d936a4 | 3374 | static enum ofperr |
f3cd3ac7 JS |
3375 | decode_OFPAT_RAW_SET_QUEUE(uint32_t queue_id, |
3376 | enum ofp_version ofp_version OVS_UNUSED, | |
3377 | struct ofpbuf *out) | |
c2d936a4 BP |
3378 | { |
3379 | ofpact_put_SET_QUEUE(out)->queue_id = queue_id; | |
3380 | return 0; | |
3381 | } | |
8621547c | 3382 | |
c2d936a4 BP |
3383 | static void |
3384 | encode_SET_QUEUE(const struct ofpact_queue *queue, | |
3385 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3386 | { | |
3387 | put_OFPAT_SET_QUEUE(out, ofp_version, queue->queue_id); | |
3388 | } | |
8621547c | 3389 | |
cab50449 | 3390 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3391 | parse_SET_QUEUE(char *arg, struct ofpbuf *ofpacts, |
3392 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3393 | { | |
3394 | return str_to_u32(arg, &ofpact_put_SET_QUEUE(ofpacts)->queue_id); | |
3395 | } | |
8621547c | 3396 | |
c2d936a4 BP |
3397 | static void |
3398 | format_SET_QUEUE(const struct ofpact_queue *a, struct ds *s) | |
3399 | { | |
3400 | ds_put_format(s, "set_queue:%"PRIu32, a->queue_id); | |
3401 | } | |
3402 | \f | |
3403 | /* Pop queue action. */ | |
1e7db674 | 3404 | |
c2d936a4 BP |
3405 | static enum ofperr |
3406 | decode_NXAST_RAW_POP_QUEUE(struct ofpbuf *out) | |
3407 | { | |
3408 | ofpact_put_POP_QUEUE(out); | |
3409 | return 0; | |
3410 | } | |
f25d0cf3 | 3411 | |
c2d936a4 BP |
3412 | static void |
3413 | encode_POP_QUEUE(const struct ofpact_null *null OVS_UNUSED, | |
3414 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
3415 | { | |
3416 | put_NXAST_POP_QUEUE(out); | |
3417 | } | |
f25d0cf3 | 3418 | |
cab50449 | 3419 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3420 | parse_POP_QUEUE(const char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
3421 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3422 | { | |
3423 | ofpact_put_POP_QUEUE(ofpacts); | |
3424 | return NULL; | |
3425 | } | |
f25d0cf3 | 3426 | |
c2d936a4 BP |
3427 | static void |
3428 | format_POP_QUEUE(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
3429 | { | |
3430 | ds_put_cstr(s, "pop_queue"); | |
3431 | } | |
3432 | \f | |
3433 | /* Action structure for NXAST_FIN_TIMEOUT. | |
3434 | * | |
3435 | * This action changes the idle timeout or hard timeout, or both, of this | |
3436 | * OpenFlow rule when the rule matches a TCP packet with the FIN or RST flag. | |
3437 | * When such a packet is observed, the action reduces the rule's idle timeout | |
3438 | * to 'fin_idle_timeout' and its hard timeout to 'fin_hard_timeout'. This | |
3439 | * action has no effect on an existing timeout that is already shorter than the | |
3440 | * one that the action specifies. A 'fin_idle_timeout' or 'fin_hard_timeout' | |
3441 | * of zero has no effect on the respective timeout. | |
3442 | * | |
3443 | * 'fin_idle_timeout' and 'fin_hard_timeout' are measured in seconds. | |
3444 | * 'fin_hard_timeout' specifies time since the flow's creation, not since the | |
3445 | * receipt of the FIN or RST. | |
3446 | * | |
3447 | * This is useful for quickly discarding learned TCP flows that otherwise will | |
3448 | * take a long time to expire. | |
3449 | * | |
3450 | * This action is intended for use with an OpenFlow rule that matches only a | |
3451 | * single TCP flow. If the rule matches multiple TCP flows (e.g. it wildcards | |
3452 | * all TCP traffic, or all TCP traffic to a particular port), then any FIN or | |
3453 | * RST in any of those flows will cause the entire OpenFlow rule to expire | |
3454 | * early, which is not normally desirable. | |
3455 | */ | |
3456 | struct nx_action_fin_timeout { | |
3457 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3458 | ovs_be16 len; /* 16. */ | |
3459 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3460 | ovs_be16 subtype; /* NXAST_FIN_TIMEOUT. */ | |
3461 | ovs_be16 fin_idle_timeout; /* New idle timeout, if nonzero. */ | |
3462 | ovs_be16 fin_hard_timeout; /* New hard timeout, if nonzero. */ | |
3463 | ovs_be16 pad; /* Must be zero. */ | |
3464 | }; | |
3465 | OFP_ASSERT(sizeof(struct nx_action_fin_timeout) == 16); | |
f25d0cf3 | 3466 | |
c2d936a4 BP |
3467 | static enum ofperr |
3468 | decode_NXAST_RAW_FIN_TIMEOUT(const struct nx_action_fin_timeout *naft, | |
f3cd3ac7 | 3469 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
3470 | struct ofpbuf *out) |
3471 | { | |
3472 | struct ofpact_fin_timeout *oft; | |
8621547c | 3473 | |
c2d936a4 BP |
3474 | oft = ofpact_put_FIN_TIMEOUT(out); |
3475 | oft->fin_idle_timeout = ntohs(naft->fin_idle_timeout); | |
3476 | oft->fin_hard_timeout = ntohs(naft->fin_hard_timeout); | |
3477 | return 0; | |
3478 | } | |
f25d0cf3 | 3479 | |
c2d936a4 BP |
3480 | static void |
3481 | encode_FIN_TIMEOUT(const struct ofpact_fin_timeout *fin_timeout, | |
3482 | enum ofp_version ofp_version OVS_UNUSED, | |
3483 | struct ofpbuf *out) | |
3484 | { | |
3485 | struct nx_action_fin_timeout *naft = put_NXAST_FIN_TIMEOUT(out); | |
3486 | naft->fin_idle_timeout = htons(fin_timeout->fin_idle_timeout); | |
3487 | naft->fin_hard_timeout = htons(fin_timeout->fin_hard_timeout); | |
3488 | } | |
f25d0cf3 | 3489 | |
cab50449 | 3490 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3491 | parse_FIN_TIMEOUT(char *arg, struct ofpbuf *ofpacts, |
3492 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3493 | { | |
3494 | struct ofpact_fin_timeout *oft = ofpact_put_FIN_TIMEOUT(ofpacts); | |
3495 | char *key, *value; | |
f25d0cf3 | 3496 | |
c2d936a4 BP |
3497 | while (ofputil_parse_key_value(&arg, &key, &value)) { |
3498 | char *error; | |
b02475c5 | 3499 | |
c2d936a4 BP |
3500 | if (!strcmp(key, "idle_timeout")) { |
3501 | error = str_to_u16(value, key, &oft->fin_idle_timeout); | |
3502 | } else if (!strcmp(key, "hard_timeout")) { | |
3503 | error = str_to_u16(value, key, &oft->fin_hard_timeout); | |
3504 | } else { | |
3505 | error = xasprintf("invalid key '%s' in 'fin_timeout' argument", | |
3506 | key); | |
8621547c | 3507 | } |
8dd54666 | 3508 | |
c2d936a4 BP |
3509 | if (error) { |
3510 | return error; | |
9cae45dc | 3511 | } |
9cae45dc | 3512 | } |
c2d936a4 BP |
3513 | return NULL; |
3514 | } | |
e3b56933 | 3515 | |
c2d936a4 BP |
3516 | static void |
3517 | format_FIN_TIMEOUT(const struct ofpact_fin_timeout *a, struct ds *s) | |
3518 | { | |
3519 | ds_put_cstr(s, "fin_timeout("); | |
3520 | if (a->fin_idle_timeout) { | |
3521 | ds_put_format(s, "idle_timeout=%"PRIu16",", a->fin_idle_timeout); | |
7e9f8266 | 3522 | } |
c2d936a4 BP |
3523 | if (a->fin_hard_timeout) { |
3524 | ds_put_format(s, "hard_timeout=%"PRIu16",", a->fin_hard_timeout); | |
f25d0cf3 | 3525 | } |
c2d936a4 BP |
3526 | ds_chomp(s, ','); |
3527 | ds_put_char(s, ')'); | |
f25d0cf3 | 3528 | } |
c2d936a4 BP |
3529 | \f |
3530 | /* Action structures for NXAST_RESUBMIT and NXAST_RESUBMIT_TABLE. | |
eca39bce | 3531 | * |
c2d936a4 | 3532 | * These actions search one of the switch's flow tables: |
ba2fe8e9 | 3533 | * |
c2d936a4 BP |
3534 | * - For NXAST_RESUBMIT_TABLE only, if the 'table' member is not 255, then |
3535 | * it specifies the table to search. | |
ca287d20 | 3536 | * |
c2d936a4 BP |
3537 | * - Otherwise (for NXAST_RESUBMIT_TABLE with a 'table' of 255, or for |
3538 | * NXAST_RESUBMIT regardless of 'table'), it searches the current flow | |
3539 | * table, that is, the OpenFlow flow table that contains the flow from | |
3540 | * which this action was obtained. If this action did not come from a | |
3541 | * flow table (e.g. it came from an OFPT_PACKET_OUT message), then table 0 | |
3542 | * is the current table. | |
3543 | * | |
3544 | * The flow table lookup uses a flow that may be slightly modified from the | |
3545 | * original lookup: | |
3546 | * | |
3547 | * - For NXAST_RESUBMIT, the 'in_port' member of struct nx_action_resubmit | |
3548 | * is used as the flow's in_port. | |
3549 | * | |
3550 | * - For NXAST_RESUBMIT_TABLE, if the 'in_port' member is not OFPP_IN_PORT, | |
3551 | * then its value is used as the flow's in_port. Otherwise, the original | |
3552 | * in_port is used. | |
3553 | * | |
3554 | * - If actions that modify the flow (e.g. OFPAT_SET_VLAN_VID) precede the | |
3555 | * resubmit action, then the flow is updated with the new values. | |
3556 | * | |
3557 | * Following the lookup, the original in_port is restored. | |
3558 | * | |
3559 | * If the modified flow matched in the flow table, then the corresponding | |
3560 | * actions are executed. Afterward, actions following the resubmit in the | |
3561 | * original set of actions, if any, are executed; any changes made to the | |
3562 | * packet (e.g. changes to VLAN) by secondary actions persist when those | |
3563 | * actions are executed, although the original in_port is restored. | |
3564 | * | |
3565 | * Resubmit actions may be used any number of times within a set of actions. | |
3566 | * | |
3567 | * Resubmit actions may nest to an implementation-defined depth. Beyond this | |
3568 | * implementation-defined depth, further resubmit actions are simply ignored. | |
3569 | * | |
3570 | * NXAST_RESUBMIT ignores 'table' and 'pad'. NXAST_RESUBMIT_TABLE requires | |
3571 | * 'pad' to be all-bits-zero. | |
3572 | * | |
3573 | * Open vSwitch 1.0.1 and earlier did not support recursion. Open vSwitch | |
3574 | * before 1.2.90 did not support NXAST_RESUBMIT_TABLE. | |
3575 | */ | |
3576 | struct nx_action_resubmit { | |
3577 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3578 | ovs_be16 len; /* Length is 16. */ | |
3579 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3580 | ovs_be16 subtype; /* NXAST_RESUBMIT. */ | |
3581 | ovs_be16 in_port; /* New in_port for checking flow table. */ | |
3582 | uint8_t table; /* NXAST_RESUBMIT_TABLE: table to use. */ | |
3583 | uint8_t pad[3]; | |
3584 | }; | |
3585 | OFP_ASSERT(sizeof(struct nx_action_resubmit) == 16); | |
3586 | ||
3587 | static enum ofperr | |
f3cd3ac7 JS |
3588 | decode_NXAST_RAW_RESUBMIT(uint16_t port, |
3589 | enum ofp_version ofp_version OVS_UNUSED, | |
3590 | struct ofpbuf *out) | |
f25d0cf3 | 3591 | { |
c2d936a4 | 3592 | struct ofpact_resubmit *resubmit; |
f25d0cf3 | 3593 | |
c2d936a4 BP |
3594 | resubmit = ofpact_put_RESUBMIT(out); |
3595 | resubmit->ofpact.raw = NXAST_RAW_RESUBMIT; | |
3596 | resubmit->in_port = u16_to_ofp(port); | |
3597 | resubmit->table_id = 0xff; | |
3598 | return 0; | |
f25d0cf3 | 3599 | } |
4cceacb9 | 3600 | |
c2d936a4 BP |
3601 | static enum ofperr |
3602 | decode_NXAST_RAW_RESUBMIT_TABLE(const struct nx_action_resubmit *nar, | |
f3cd3ac7 | 3603 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 | 3604 | struct ofpbuf *out) |
ba2fe8e9 | 3605 | { |
c2d936a4 | 3606 | struct ofpact_resubmit *resubmit; |
ba2fe8e9 | 3607 | |
c2d936a4 BP |
3608 | if (nar->pad[0] || nar->pad[1] || nar->pad[2]) { |
3609 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3610 | } | |
3611 | ||
3612 | resubmit = ofpact_put_RESUBMIT(out); | |
3613 | resubmit->ofpact.raw = NXAST_RAW_RESUBMIT_TABLE; | |
3614 | resubmit->in_port = u16_to_ofp(ntohs(nar->in_port)); | |
3615 | resubmit->table_id = nar->table; | |
3616 | return 0; | |
ba2fe8e9 BP |
3617 | } |
3618 | ||
c2d936a4 BP |
3619 | static void |
3620 | encode_RESUBMIT(const struct ofpact_resubmit *resubmit, | |
3621 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4cceacb9 | 3622 | { |
c2d936a4 | 3623 | uint16_t in_port = ofp_to_u16(resubmit->in_port); |
4cceacb9 | 3624 | |
c2d936a4 BP |
3625 | if (resubmit->table_id == 0xff |
3626 | && resubmit->ofpact.raw != NXAST_RAW_RESUBMIT_TABLE) { | |
3627 | put_NXAST_RESUBMIT(out, in_port); | |
3628 | } else { | |
3629 | struct nx_action_resubmit *nar = put_NXAST_RESUBMIT_TABLE(out); | |
3630 | nar->table = resubmit->table_id; | |
3631 | nar->in_port = htons(in_port); | |
3632 | } | |
3633 | } | |
6813ee7c | 3634 | |
cab50449 | 3635 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3636 | parse_RESUBMIT(char *arg, struct ofpbuf *ofpacts, |
3637 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3638 | { | |
3639 | struct ofpact_resubmit *resubmit; | |
3640 | char *in_port_s, *table_s; | |
6813ee7c | 3641 | |
c2d936a4 | 3642 | resubmit = ofpact_put_RESUBMIT(ofpacts); |
8f2cded4 | 3643 | |
c2d936a4 BP |
3644 | in_port_s = strsep(&arg, ","); |
3645 | if (in_port_s && in_port_s[0]) { | |
3646 | if (!ofputil_port_from_string(in_port_s, &resubmit->in_port)) { | |
3647 | return xasprintf("%s: resubmit to unknown port", in_port_s); | |
8f2cded4 | 3648 | } |
c2d936a4 BP |
3649 | } else { |
3650 | resubmit->in_port = OFPP_IN_PORT; | |
3651 | } | |
4cceacb9 | 3652 | |
c2d936a4 BP |
3653 | table_s = strsep(&arg, ","); |
3654 | if (table_s && table_s[0]) { | |
3655 | uint32_t table_id = 0; | |
3656 | char *error; | |
3657 | ||
3658 | error = str_to_u32(table_s, &table_id); | |
3659 | if (error) { | |
3660 | return error; | |
3661 | } | |
3662 | resubmit->table_id = table_id; | |
3663 | } else { | |
3664 | resubmit->table_id = 255; | |
4cceacb9 JS |
3665 | } |
3666 | ||
c2d936a4 BP |
3667 | if (resubmit->in_port == OFPP_IN_PORT && resubmit->table_id == 255) { |
3668 | return xstrdup("at least one \"in_port\" or \"table\" must be " | |
3669 | "specified on resubmit"); | |
3670 | } | |
3671 | return NULL; | |
3672 | } | |
3673 | ||
3674 | static void | |
3675 | format_RESUBMIT(const struct ofpact_resubmit *a, struct ds *s) | |
3676 | { | |
3677 | if (a->in_port != OFPP_IN_PORT && a->table_id == 255) { | |
3678 | ds_put_cstr(s, "resubmit:"); | |
3679 | ofputil_format_port(a->in_port, s); | |
3680 | } else { | |
3681 | ds_put_format(s, "resubmit("); | |
3682 | if (a->in_port != OFPP_IN_PORT) { | |
3683 | ofputil_format_port(a->in_port, s); | |
3684 | } | |
3685 | ds_put_char(s, ','); | |
3686 | if (a->table_id != 255) { | |
3687 | ds_put_format(s, "%"PRIu8, a->table_id); | |
3688 | } | |
3689 | ds_put_char(s, ')'); | |
3690 | } | |
3691 | } | |
3692 | \f | |
3693 | /* Action structure for NXAST_LEARN. | |
3694 | * | |
3695 | * This action adds or modifies a flow in an OpenFlow table, similar to | |
3696 | * OFPT_FLOW_MOD with OFPFC_MODIFY_STRICT as 'command'. The new flow has the | |
3697 | * specified idle timeout, hard timeout, priority, cookie, and flags. The new | |
3698 | * flow's match criteria and actions are built by applying each of the series | |
3699 | * of flow_mod_spec elements included as part of the action. | |
3700 | * | |
3701 | * A flow_mod_spec starts with a 16-bit header. A header that is all-bits-0 is | |
3702 | * a no-op used for padding the action as a whole to a multiple of 8 bytes in | |
3703 | * length. Otherwise, the flow_mod_spec can be thought of as copying 'n_bits' | |
3704 | * bits from a source to a destination. In this case, the header contains | |
3705 | * multiple fields: | |
3706 | * | |
3707 | * 15 14 13 12 11 10 0 | |
3708 | * +------+---+------+---------------------------------+ | |
3709 | * | 0 |src| dst | n_bits | | |
3710 | * +------+---+------+---------------------------------+ | |
3711 | * | |
3712 | * The meaning and format of a flow_mod_spec depends on 'src' and 'dst'. The | |
3713 | * following table summarizes the meaning of each possible combination. | |
3714 | * Details follow the table: | |
3715 | * | |
3716 | * src dst meaning | |
3717 | * --- --- ---------------------------------------------------------- | |
3718 | * 0 0 Add match criteria based on value in a field. | |
3719 | * 1 0 Add match criteria based on an immediate value. | |
3720 | * 0 1 Add NXAST_REG_LOAD action to copy field into a different field. | |
3721 | * 1 1 Add NXAST_REG_LOAD action to load immediate value into a field. | |
3722 | * 0 2 Add OFPAT_OUTPUT action to output to port from specified field. | |
3723 | * All other combinations are undefined and not allowed. | |
3724 | * | |
3725 | * The flow_mod_spec header is followed by a source specification and a | |
3726 | * destination specification. The format and meaning of the source | |
3727 | * specification depends on 'src': | |
3728 | * | |
3729 | * - If 'src' is 0, the source bits are taken from a field in the flow to | |
3730 | * which this action is attached. (This should be a wildcarded field. If | |
3731 | * its value is fully specified then the source bits being copied have | |
3732 | * constant values.) | |
3733 | * | |
3734 | * The source specification is an ovs_be32 'field' and an ovs_be16 'ofs'. | |
3735 | * 'field' is an nxm_header with nxm_hasmask=0, and 'ofs' the starting bit | |
3736 | * offset within that field. The source bits are field[ofs:ofs+n_bits-1]. | |
3737 | * 'field' and 'ofs' are subject to the same restrictions as the source | |
3738 | * field in NXAST_REG_MOVE. | |
3739 | * | |
3740 | * - If 'src' is 1, the source bits are a constant value. The source | |
3741 | * specification is (n_bits+15)/16*2 bytes long. Taking those bytes as a | |
3742 | * number in network order, the source bits are the 'n_bits' | |
3743 | * least-significant bits. The switch will report an error if other bits | |
3744 | * in the constant are nonzero. | |
3745 | * | |
3746 | * The flow_mod_spec destination specification, for 'dst' of 0 or 1, is an | |
3747 | * ovs_be32 'field' and an ovs_be16 'ofs'. 'field' is an nxm_header with | |
3748 | * nxm_hasmask=0 and 'ofs' is a starting bit offset within that field. The | |
3749 | * meaning of the flow_mod_spec depends on 'dst': | |
3750 | * | |
3751 | * - If 'dst' is 0, the flow_mod_spec specifies match criteria for the new | |
3752 | * flow. The new flow matches only if bits field[ofs:ofs+n_bits-1] in a | |
3753 | * packet equal the source bits. 'field' may be any nxm_header with | |
3754 | * nxm_hasmask=0 that is allowed in NXT_FLOW_MOD. | |
3755 | * | |
3756 | * Order is significant. Earlier flow_mod_specs must satisfy any | |
3757 | * prerequisites for matching fields specified later, by copying constant | |
3758 | * values into prerequisite fields. | |
3759 | * | |
3760 | * The switch will reject flow_mod_specs that do not satisfy NXM masking | |
3761 | * restrictions. | |
3762 | * | |
3763 | * - If 'dst' is 1, the flow_mod_spec specifies an NXAST_REG_LOAD action for | |
3764 | * the new flow. The new flow copies the source bits into | |
3765 | * field[ofs:ofs+n_bits-1]. Actions are executed in the same order as the | |
3766 | * flow_mod_specs. | |
3767 | * | |
3768 | * A single NXAST_REG_LOAD action writes no more than 64 bits, so n_bits | |
3769 | * greater than 64 yields multiple NXAST_REG_LOAD actions. | |
3770 | * | |
3771 | * The flow_mod_spec destination spec for 'dst' of 2 (when 'src' is 0) is | |
3772 | * empty. It has the following meaning: | |
3773 | * | |
3774 | * - The flow_mod_spec specifies an OFPAT_OUTPUT action for the new flow. | |
3775 | * The new flow outputs to the OpenFlow port specified by the source field. | |
3776 | * Of the special output ports with value OFPP_MAX or larger, OFPP_IN_PORT, | |
3777 | * OFPP_FLOOD, OFPP_LOCAL, and OFPP_ALL are supported. Other special ports | |
3778 | * may not be used. | |
3779 | * | |
3780 | * Resource Management | |
3781 | * ------------------- | |
3782 | * | |
3783 | * A switch has a finite amount of flow table space available for learning. | |
3784 | * When this space is exhausted, no new learning table entries will be learned | |
3785 | * until some existing flow table entries expire. The controller should be | |
3786 | * prepared to handle this by flooding (which can be implemented as a | |
3787 | * low-priority flow). | |
3788 | * | |
3789 | * If a learned flow matches a single TCP stream with a relatively long | |
3790 | * timeout, one may make the best of resource constraints by setting | |
3791 | * 'fin_idle_timeout' or 'fin_hard_timeout' (both measured in seconds), or | |
3792 | * both, to shorter timeouts. When either of these is specified as a nonzero | |
3793 | * value, OVS adds a NXAST_FIN_TIMEOUT action, with the specified timeouts, to | |
3794 | * the learned flow. | |
3795 | * | |
3796 | * Examples | |
3797 | * -------- | |
3798 | * | |
3799 | * The following examples give a prose description of the flow_mod_specs along | |
3800 | * with informal notation for how those would be represented and a hex dump of | |
3801 | * the bytes that would be required. | |
3802 | * | |
3803 | * These examples could work with various nx_action_learn parameters. Typical | |
3804 | * values would be idle_timeout=OFP_FLOW_PERMANENT, hard_timeout=60, | |
3805 | * priority=OFP_DEFAULT_PRIORITY, flags=0, table_id=10. | |
3806 | * | |
3807 | * 1. Learn input port based on the source MAC, with lookup into | |
3808 | * NXM_NX_REG1[16:31] by resubmit to in_port=99: | |
3809 | * | |
3810 | * Match on in_port=99: | |
3811 | * ovs_be16(src=1, dst=0, n_bits=16), 20 10 | |
3812 | * ovs_be16(99), 00 63 | |
3813 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3814 | * | |
3815 | * Match Ethernet destination on Ethernet source from packet: | |
3816 | * ovs_be16(src=0, dst=0, n_bits=48), 00 30 | |
3817 | * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00 | |
3818 | * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00 | |
3819 | * | |
3820 | * Set NXM_NX_REG1[16:31] to the packet's input port: | |
3821 | * ovs_be16(src=0, dst=1, n_bits=16), 08 10 | |
3822 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3823 | * ovs_be32(NXM_NX_REG1), ovs_be16(16) 00 01 02 04 00 10 | |
3824 | * | |
3825 | * Given a packet that arrived on port A with Ethernet source address B, | |
3826 | * this would set up the flow "in_port=99, dl_dst=B, | |
3827 | * actions=load:A->NXM_NX_REG1[16..31]". | |
3828 | * | |
3829 | * In syntax accepted by ovs-ofctl, this action is: learn(in_port=99, | |
3830 | * NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], | |
3831 | * load:NXM_OF_IN_PORT[]->NXM_NX_REG1[16..31]) | |
3832 | * | |
3833 | * 2. Output to input port based on the source MAC and VLAN VID, with lookup | |
3834 | * into NXM_NX_REG1[16:31]: | |
3835 | * | |
3836 | * Match on same VLAN ID as packet: | |
3837 | * ovs_be16(src=0, dst=0, n_bits=12), 00 0c | |
3838 | * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00 | |
3839 | * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00 | |
3840 | * | |
3841 | * Match Ethernet destination on Ethernet source from packet: | |
3842 | * ovs_be16(src=0, dst=0, n_bits=48), 00 30 | |
3843 | * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00 | |
3844 | * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00 | |
3845 | * | |
3846 | * Output to the packet's input port: | |
3847 | * ovs_be16(src=0, dst=2, n_bits=16), 10 10 | |
3848 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3849 | * | |
3850 | * Given a packet that arrived on port A with Ethernet source address B in | |
3851 | * VLAN C, this would set up the flow "dl_dst=B, vlan_vid=C, | |
3852 | * actions=output:A". | |
3853 | * | |
3854 | * In syntax accepted by ovs-ofctl, this action is: | |
3855 | * learn(NXM_OF_VLAN_TCI[0..11], NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], | |
3856 | * output:NXM_OF_IN_PORT[]) | |
3857 | * | |
3858 | * 3. Here's a recipe for a very simple-minded MAC learning switch. It uses a | |
3859 | * 10-second MAC expiration time to make it easier to see what's going on | |
3860 | * | |
3861 | * ovs-vsctl del-controller br0 | |
3862 | * ovs-ofctl del-flows br0 | |
3863 | * ovs-ofctl add-flow br0 "table=0 actions=learn(table=1, \ | |
3864 | hard_timeout=10, NXM_OF_VLAN_TCI[0..11], \ | |
3865 | NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], \ | |
3866 | output:NXM_OF_IN_PORT[]), resubmit(,1)" | |
3867 | * ovs-ofctl add-flow br0 "table=1 priority=0 actions=flood" | |
3868 | * | |
3869 | * You can then dump the MAC learning table with: | |
3870 | * | |
3871 | * ovs-ofctl dump-flows br0 table=1 | |
3872 | * | |
3873 | * Usage Advice | |
3874 | * ------------ | |
3875 | * | |
3876 | * For best performance, segregate learned flows into a table that is not used | |
3877 | * for any other flows except possibly for a lowest-priority "catch-all" flow | |
3878 | * (a flow with no match criteria). If different learning actions specify | |
3879 | * different match criteria, use different tables for the learned flows. | |
3880 | * | |
3881 | * The meaning of 'hard_timeout' and 'idle_timeout' can be counterintuitive. | |
3882 | * These timeouts apply to the flow that is added, which means that a flow with | |
3883 | * an idle timeout will expire when no traffic has been sent *to* the learned | |
3884 | * address. This is not usually the intent in MAC learning; instead, we want | |
3885 | * the MAC learn entry to expire when no traffic has been sent *from* the | |
3886 | * learned address. Use a hard timeout for that. | |
39c94593 JR |
3887 | * |
3888 | * | |
3889 | * Visibility of Changes | |
3890 | * --------------------- | |
3891 | * | |
3892 | * Prior to Open vSwitch 2.4, any changes made by a "learn" action in a given | |
3893 | * flow translation are visible to flow table lookups made later in the flow | |
3894 | * translation. This means that, in the example above, a MAC learned by the | |
3895 | * learn action in table 0 would be found in table 1 (if the packet being | |
3896 | * processed had the same source and destination MAC address). | |
3897 | * | |
3898 | * In Open vSwitch 2.4 and later, changes to a flow table (whether to add or | |
3899 | * modify a flow) by a "learn" action are visible only for later flow | |
3900 | * translations, not for later lookups within the same flow translation. In | |
3901 | * the MAC learning example, a MAC learned by the learn action in table 0 would | |
3902 | * not be found in table 1 if the flow translation would resubmit to table 1 | |
3903 | * after the processing of the learn action, meaning that if this MAC had not | |
3904 | * been learned before then the packet would be flooded. */ | |
c2d936a4 BP |
3905 | struct nx_action_learn { |
3906 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3907 | ovs_be16 len; /* At least 24. */ | |
3908 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3909 | ovs_be16 subtype; /* NXAST_LEARN. */ | |
3910 | ovs_be16 idle_timeout; /* Idle time before discarding (seconds). */ | |
3911 | ovs_be16 hard_timeout; /* Max time before discarding (seconds). */ | |
3912 | ovs_be16 priority; /* Priority level of flow entry. */ | |
3913 | ovs_be64 cookie; /* Cookie for new flow. */ | |
3914 | ovs_be16 flags; /* NX_LEARN_F_*. */ | |
3915 | uint8_t table_id; /* Table to insert flow entry. */ | |
3916 | uint8_t pad; /* Must be zero. */ | |
3917 | ovs_be16 fin_idle_timeout; /* Idle timeout after FIN, if nonzero. */ | |
3918 | ovs_be16 fin_hard_timeout; /* Hard timeout after FIN, if nonzero. */ | |
3919 | /* Followed by a sequence of flow_mod_spec elements, as described above, | |
3920 | * until the end of the action is reached. */ | |
3921 | }; | |
3922 | OFP_ASSERT(sizeof(struct nx_action_learn) == 32); | |
3923 | ||
3924 | static ovs_be16 | |
3925 | get_be16(const void **pp) | |
3926 | { | |
3927 | const ovs_be16 *p = *pp; | |
3928 | ovs_be16 value = *p; | |
3929 | *pp = p + 1; | |
3930 | return value; | |
3931 | } | |
3932 | ||
3933 | static ovs_be32 | |
3934 | get_be32(const void **pp) | |
3935 | { | |
3936 | const ovs_be32 *p = *pp; | |
3937 | ovs_be32 value = get_unaligned_be32(p); | |
3938 | *pp = p + 1; | |
3939 | return value; | |
3940 | } | |
3941 | ||
3942 | static void | |
3943 | get_subfield(int n_bits, const void **p, struct mf_subfield *sf) | |
3944 | { | |
3945 | sf->field = mf_from_nxm_header(ntohl(get_be32(p))); | |
3946 | sf->ofs = ntohs(get_be16(p)); | |
3947 | sf->n_bits = n_bits; | |
3948 | } | |
3949 | ||
3950 | static unsigned int | |
3951 | learn_min_len(uint16_t header) | |
3952 | { | |
3953 | int n_bits = header & NX_LEARN_N_BITS_MASK; | |
3954 | int src_type = header & NX_LEARN_SRC_MASK; | |
3955 | int dst_type = header & NX_LEARN_DST_MASK; | |
3956 | unsigned int min_len; | |
3957 | ||
3958 | min_len = 0; | |
3959 | if (src_type == NX_LEARN_SRC_FIELD) { | |
3960 | min_len += sizeof(ovs_be32); /* src_field */ | |
3961 | min_len += sizeof(ovs_be16); /* src_ofs */ | |
3962 | } else { | |
3963 | min_len += DIV_ROUND_UP(n_bits, 16); | |
3964 | } | |
3965 | if (dst_type == NX_LEARN_DST_MATCH || | |
3966 | dst_type == NX_LEARN_DST_LOAD) { | |
3967 | min_len += sizeof(ovs_be32); /* dst_field */ | |
3968 | min_len += sizeof(ovs_be16); /* dst_ofs */ | |
3969 | } | |
3970 | return min_len; | |
3971 | } | |
3972 | ||
3973 | /* Converts 'nal' into a "struct ofpact_learn" and appends that struct to | |
3974 | * 'ofpacts'. Returns 0 if successful, otherwise an OFPERR_*. */ | |
3975 | static enum ofperr | |
3976 | decode_NXAST_RAW_LEARN(const struct nx_action_learn *nal, | |
f3cd3ac7 | 3977 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
3978 | struct ofpbuf *ofpacts) |
3979 | { | |
3980 | struct ofpact_learn *learn; | |
3981 | const void *p, *end; | |
3982 | ||
3983 | if (nal->pad) { | |
3984 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3985 | } | |
3986 | ||
3987 | learn = ofpact_put_LEARN(ofpacts); | |
3988 | ||
3989 | learn->idle_timeout = ntohs(nal->idle_timeout); | |
3990 | learn->hard_timeout = ntohs(nal->hard_timeout); | |
3991 | learn->priority = ntohs(nal->priority); | |
3992 | learn->cookie = nal->cookie; | |
3993 | learn->table_id = nal->table_id; | |
3994 | learn->fin_idle_timeout = ntohs(nal->fin_idle_timeout); | |
3995 | learn->fin_hard_timeout = ntohs(nal->fin_hard_timeout); | |
3996 | ||
3997 | learn->flags = ntohs(nal->flags); | |
3998 | if (learn->flags & ~(NX_LEARN_F_SEND_FLOW_REM | | |
3999 | NX_LEARN_F_DELETE_LEARNED)) { | |
4000 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4001 | } | |
4002 | ||
4003 | if (learn->table_id == 0xff) { | |
4004 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4005 | } | |
4006 | ||
4007 | end = (char *) nal + ntohs(nal->len); | |
4008 | for (p = nal + 1; p != end; ) { | |
4009 | struct ofpact_learn_spec *spec; | |
4010 | uint16_t header = ntohs(get_be16(&p)); | |
4011 | ||
4012 | if (!header) { | |
4013 | break; | |
4014 | } | |
4015 | ||
4016 | spec = ofpbuf_put_zeros(ofpacts, sizeof *spec); | |
6fd6ed71 | 4017 | learn = ofpacts->header; |
c2d936a4 BP |
4018 | learn->n_specs++; |
4019 | ||
4020 | spec->src_type = header & NX_LEARN_SRC_MASK; | |
4021 | spec->dst_type = header & NX_LEARN_DST_MASK; | |
4022 | spec->n_bits = header & NX_LEARN_N_BITS_MASK; | |
4023 | ||
4024 | /* Check for valid src and dst type combination. */ | |
4025 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
4026 | spec->dst_type == NX_LEARN_DST_LOAD || | |
4027 | (spec->dst_type == NX_LEARN_DST_OUTPUT && | |
4028 | spec->src_type == NX_LEARN_SRC_FIELD)) { | |
4029 | /* OK. */ | |
4030 | } else { | |
4031 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4032 | } | |
4033 | ||
4034 | /* Check that the arguments don't overrun the end of the action. */ | |
4035 | if ((char *) end - (char *) p < learn_min_len(header)) { | |
4036 | return OFPERR_OFPBAC_BAD_LEN; | |
4037 | } | |
4038 | ||
4039 | /* Get the source. */ | |
4040 | if (spec->src_type == NX_LEARN_SRC_FIELD) { | |
4041 | get_subfield(spec->n_bits, &p, &spec->src); | |
4042 | } else { | |
4043 | int p_bytes = 2 * DIV_ROUND_UP(spec->n_bits, 16); | |
4044 | ||
4045 | bitwise_copy(p, p_bytes, 0, | |
4046 | &spec->src_imm, sizeof spec->src_imm, 0, | |
4047 | spec->n_bits); | |
4048 | p = (const uint8_t *) p + p_bytes; | |
4049 | } | |
4050 | ||
4051 | /* Get the destination. */ | |
4052 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
4053 | spec->dst_type == NX_LEARN_DST_LOAD) { | |
4054 | get_subfield(spec->n_bits, &p, &spec->dst); | |
4055 | } | |
4056 | } | |
34abaa3d | 4057 | ofpact_finish(ofpacts, &learn->ofpact); |
c2d936a4 BP |
4058 | |
4059 | if (!is_all_zeros(p, (char *) end - (char *) p)) { | |
4060 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4061 | } | |
4062 | ||
4063 | return 0; | |
4064 | } | |
4065 | ||
4066 | static void | |
4067 | put_be16(struct ofpbuf *b, ovs_be16 x) | |
4068 | { | |
4069 | ofpbuf_put(b, &x, sizeof x); | |
4070 | } | |
4071 | ||
4072 | static void | |
4073 | put_be32(struct ofpbuf *b, ovs_be32 x) | |
4074 | { | |
4075 | ofpbuf_put(b, &x, sizeof x); | |
4076 | } | |
4077 | ||
4078 | static void | |
4079 | put_u16(struct ofpbuf *b, uint16_t x) | |
4080 | { | |
4081 | put_be16(b, htons(x)); | |
4082 | } | |
4083 | ||
4084 | static void | |
4085 | put_u32(struct ofpbuf *b, uint32_t x) | |
4086 | { | |
4087 | put_be32(b, htonl(x)); | |
4088 | } | |
4089 | ||
4090 | static void | |
4091 | encode_LEARN(const struct ofpact_learn *learn, | |
4092 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4093 | { | |
4094 | const struct ofpact_learn_spec *spec; | |
4095 | struct nx_action_learn *nal; | |
4096 | size_t start_ofs; | |
4097 | ||
6fd6ed71 | 4098 | start_ofs = out->size; |
c2d936a4 BP |
4099 | nal = put_NXAST_LEARN(out); |
4100 | nal->idle_timeout = htons(learn->idle_timeout); | |
4101 | nal->hard_timeout = htons(learn->hard_timeout); | |
4102 | nal->fin_idle_timeout = htons(learn->fin_idle_timeout); | |
4103 | nal->fin_hard_timeout = htons(learn->fin_hard_timeout); | |
4104 | nal->priority = htons(learn->priority); | |
4105 | nal->cookie = learn->cookie; | |
4106 | nal->flags = htons(learn->flags); | |
4107 | nal->table_id = learn->table_id; | |
4108 | ||
4109 | for (spec = learn->specs; spec < &learn->specs[learn->n_specs]; spec++) { | |
4110 | put_u16(out, spec->n_bits | spec->dst_type | spec->src_type); | |
4111 | ||
4112 | if (spec->src_type == NX_LEARN_SRC_FIELD) { | |
508a9338 | 4113 | put_u32(out, mf_nxm_header(spec->src.field->id)); |
c2d936a4 BP |
4114 | put_u16(out, spec->src.ofs); |
4115 | } else { | |
4116 | size_t n_dst_bytes = 2 * DIV_ROUND_UP(spec->n_bits, 16); | |
4117 | uint8_t *bits = ofpbuf_put_zeros(out, n_dst_bytes); | |
4118 | bitwise_copy(&spec->src_imm, sizeof spec->src_imm, 0, | |
4119 | bits, n_dst_bytes, 0, | |
4120 | spec->n_bits); | |
4121 | } | |
4122 | ||
4123 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
4124 | spec->dst_type == NX_LEARN_DST_LOAD) { | |
508a9338 | 4125 | put_u32(out, mf_nxm_header(spec->dst.field->id)); |
c2d936a4 BP |
4126 | put_u16(out, spec->dst.ofs); |
4127 | } | |
4128 | } | |
4129 | ||
178742f9 | 4130 | pad_ofpat(out, start_ofs); |
c2d936a4 BP |
4131 | } |
4132 | ||
cab50449 | 4133 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4134 | parse_LEARN(char *arg, struct ofpbuf *ofpacts, |
4135 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4136 | { | |
4137 | return learn_parse(arg, ofpacts); | |
4138 | } | |
4139 | ||
4140 | static void | |
4141 | format_LEARN(const struct ofpact_learn *a, struct ds *s) | |
4142 | { | |
4143 | learn_format(a, s); | |
4144 | } | |
4145 | \f | |
18080541 BP |
4146 | /* Action structure for NXAST_CONJUNCTION. */ |
4147 | struct nx_action_conjunction { | |
4148 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4149 | ovs_be16 len; /* At least 16. */ | |
4150 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4151 | ovs_be16 subtype; /* See enum ofp_raw_action_type. */ | |
4152 | uint8_t clause; | |
4153 | uint8_t n_clauses; | |
4154 | ovs_be32 id; | |
4155 | }; | |
4156 | OFP_ASSERT(sizeof(struct nx_action_conjunction) == 16); | |
4157 | ||
4158 | static void | |
4159 | add_conjunction(struct ofpbuf *out, | |
4160 | uint32_t id, uint8_t clause, uint8_t n_clauses) | |
4161 | { | |
4162 | struct ofpact_conjunction *oc; | |
4163 | ||
4164 | oc = ofpact_put_CONJUNCTION(out); | |
4165 | oc->id = id; | |
4166 | oc->clause = clause; | |
4167 | oc->n_clauses = n_clauses; | |
4168 | } | |
4169 | ||
4170 | static enum ofperr | |
4171 | decode_NXAST_RAW_CONJUNCTION(const struct nx_action_conjunction *nac, | |
f3cd3ac7 | 4172 | enum ofp_version ofp_version OVS_UNUSED, |
18080541 BP |
4173 | struct ofpbuf *out) |
4174 | { | |
4175 | if (nac->n_clauses < 2 || nac->n_clauses > 64 | |
4176 | || nac->clause >= nac->n_clauses) { | |
4177 | return OFPERR_NXBAC_BAD_CONJUNCTION; | |
4178 | } else { | |
4179 | add_conjunction(out, ntohl(nac->id), nac->clause, nac->n_clauses); | |
4180 | return 0; | |
4181 | } | |
4182 | } | |
4183 | ||
4184 | static void | |
4185 | encode_CONJUNCTION(const struct ofpact_conjunction *oc, | |
4186 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4187 | { | |
4188 | struct nx_action_conjunction *nac = put_NXAST_CONJUNCTION(out); | |
4189 | nac->clause = oc->clause; | |
4190 | nac->n_clauses = oc->n_clauses; | |
4191 | nac->id = htonl(oc->id); | |
4192 | } | |
4193 | ||
4194 | static void | |
4195 | format_CONJUNCTION(const struct ofpact_conjunction *oc, struct ds *s) | |
4196 | { | |
4197 | ds_put_format(s, "conjunction(%"PRIu32",%"PRIu8"/%"PRIu8")", | |
4198 | oc->id, oc->clause + 1, oc->n_clauses); | |
4199 | } | |
4200 | ||
4201 | static char * OVS_WARN_UNUSED_RESULT | |
4202 | parse_CONJUNCTION(const char *arg, struct ofpbuf *ofpacts, | |
4203 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4204 | { | |
4205 | uint8_t n_clauses; | |
4206 | uint8_t clause; | |
4207 | uint32_t id; | |
4208 | int n; | |
4209 | ||
4210 | if (!ovs_scan(arg, "%"SCNi32" , %"SCNu8" / %"SCNu8" %n", | |
4211 | &id, &clause, &n_clauses, &n) || n != strlen(arg)) { | |
4212 | return xstrdup("\"conjunction\" syntax is \"conjunction(id,i/n)\""); | |
4213 | } | |
4214 | ||
4215 | if (n_clauses < 2) { | |
4216 | return xstrdup("conjunction must have at least 2 clauses"); | |
4217 | } else if (n_clauses > 64) { | |
4218 | return xstrdup("conjunction must have at most 64 clauses"); | |
4219 | } else if (clause < 1) { | |
4220 | return xstrdup("clause index must be positive"); | |
4221 | } else if (clause > n_clauses) { | |
4222 | return xstrdup("clause index must be less than or equal to " | |
4223 | "number of clauses"); | |
4224 | } | |
4225 | ||
4226 | add_conjunction(ofpacts, id, clause - 1, n_clauses); | |
4227 | return NULL; | |
4228 | } | |
4229 | \f | |
c2d936a4 BP |
4230 | /* Action structure for NXAST_MULTIPATH. |
4231 | * | |
4232 | * This action performs the following steps in sequence: | |
4233 | * | |
4234 | * 1. Hashes the fields designated by 'fields', one of NX_HASH_FIELDS_*. | |
4235 | * Refer to the definition of "enum nx_mp_fields" for details. | |
4236 | * | |
4237 | * The 'basis' value is used as a universal hash parameter, that is, | |
4238 | * different values of 'basis' yield different hash functions. The | |
4239 | * particular universal hash function used is implementation-defined. | |
4240 | * | |
4241 | * The hashed fields' values are drawn from the current state of the | |
4242 | * flow, including all modifications that have been made by actions up to | |
4243 | * this point. | |
4244 | * | |
4245 | * 2. Applies the multipath link choice algorithm specified by 'algorithm', | |
4246 | * one of NX_MP_ALG_*. Refer to the definition of "enum nx_mp_algorithm" | |
4247 | * for details. | |
4248 | * | |
4249 | * The output of the algorithm is 'link', an unsigned integer less than | |
4250 | * or equal to 'max_link'. | |
4251 | * | |
4252 | * Some algorithms use 'arg' as an additional argument. | |
4253 | * | |
4254 | * 3. Stores 'link' in dst[ofs:ofs+n_bits]. The format and semantics of | |
4255 | * 'dst' and 'ofs_nbits' are similar to those for the NXAST_REG_LOAD | |
4256 | * action. | |
4257 | * | |
4258 | * The switch will reject actions that have an unknown 'fields', or an unknown | |
4259 | * 'algorithm', or in which ofs+n_bits is greater than the width of 'dst', or | |
4260 | * in which 'max_link' is greater than or equal to 2**n_bits, with error type | |
4261 | * OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT. | |
4262 | */ | |
4263 | struct nx_action_multipath { | |
4264 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4265 | ovs_be16 len; /* Length is 32. */ | |
4266 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4267 | ovs_be16 subtype; /* NXAST_MULTIPATH. */ | |
4268 | ||
4269 | /* What fields to hash and how. */ | |
4270 | ovs_be16 fields; /* One of NX_HASH_FIELDS_*. */ | |
4271 | ovs_be16 basis; /* Universal hash parameter. */ | |
4272 | ovs_be16 pad0; | |
4273 | ||
4274 | /* Multipath link choice algorithm to apply to hash value. */ | |
4275 | ovs_be16 algorithm; /* One of NX_MP_ALG_*. */ | |
4276 | ovs_be16 max_link; /* Number of output links, minus 1. */ | |
4277 | ovs_be32 arg; /* Algorithm-specific argument. */ | |
4278 | ovs_be16 pad1; | |
4279 | ||
4280 | /* Where to store the result. */ | |
4281 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
4282 | ovs_be32 dst; /* Destination. */ | |
4283 | }; | |
4284 | OFP_ASSERT(sizeof(struct nx_action_multipath) == 32); | |
4285 | ||
4286 | static enum ofperr | |
4287 | decode_NXAST_RAW_MULTIPATH(const struct nx_action_multipath *nam, | |
f3cd3ac7 | 4288 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
4289 | struct ofpbuf *out) |
4290 | { | |
4291 | uint32_t n_links = ntohs(nam->max_link) + 1; | |
4292 | size_t min_n_bits = log_2_ceil(n_links); | |
4293 | struct ofpact_multipath *mp; | |
4294 | ||
4295 | mp = ofpact_put_MULTIPATH(out); | |
4296 | mp->fields = ntohs(nam->fields); | |
4297 | mp->basis = ntohs(nam->basis); | |
4298 | mp->algorithm = ntohs(nam->algorithm); | |
4299 | mp->max_link = ntohs(nam->max_link); | |
4300 | mp->arg = ntohl(nam->arg); | |
4301 | mp->dst.field = mf_from_nxm_header(ntohl(nam->dst)); | |
4302 | mp->dst.ofs = nxm_decode_ofs(nam->ofs_nbits); | |
4303 | mp->dst.n_bits = nxm_decode_n_bits(nam->ofs_nbits); | |
4304 | ||
4305 | if (!flow_hash_fields_valid(mp->fields)) { | |
4306 | VLOG_WARN_RL(&rl, "unsupported fields %d", (int) mp->fields); | |
4307 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4308 | } else if (mp->algorithm != NX_MP_ALG_MODULO_N | |
4309 | && mp->algorithm != NX_MP_ALG_HASH_THRESHOLD | |
4310 | && mp->algorithm != NX_MP_ALG_HRW | |
4311 | && mp->algorithm != NX_MP_ALG_ITER_HASH) { | |
4312 | VLOG_WARN_RL(&rl, "unsupported algorithm %d", (int) mp->algorithm); | |
4313 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4314 | } else if (mp->dst.n_bits < min_n_bits) { | |
4315 | VLOG_WARN_RL(&rl, "multipath action requires at least %"PRIuSIZE" bits for " | |
4316 | "%"PRIu32" links", min_n_bits, n_links); | |
4317 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4318 | } | |
4319 | ||
4320 | return multipath_check(mp, NULL); | |
4321 | } | |
4322 | ||
4323 | static void | |
4324 | encode_MULTIPATH(const struct ofpact_multipath *mp, | |
4325 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4326 | { | |
4327 | struct nx_action_multipath *nam = put_NXAST_MULTIPATH(out); | |
4328 | ||
4329 | nam->fields = htons(mp->fields); | |
4330 | nam->basis = htons(mp->basis); | |
4331 | nam->algorithm = htons(mp->algorithm); | |
4332 | nam->max_link = htons(mp->max_link); | |
4333 | nam->arg = htonl(mp->arg); | |
4334 | nam->ofs_nbits = nxm_encode_ofs_nbits(mp->dst.ofs, mp->dst.n_bits); | |
508a9338 | 4335 | nam->dst = htonl(mf_nxm_header(mp->dst.field->id)); |
c2d936a4 BP |
4336 | } |
4337 | ||
cab50449 | 4338 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4339 | parse_MULTIPATH(const char *arg, struct ofpbuf *ofpacts, |
4340 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4341 | { | |
4342 | return multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg); | |
4343 | } | |
4344 | ||
4345 | static void | |
4346 | format_MULTIPATH(const struct ofpact_multipath *a, struct ds *s) | |
4347 | { | |
4348 | multipath_format(a, s); | |
4349 | } | |
4350 | \f | |
4351 | /* Action structure for NXAST_NOTE. | |
4352 | * | |
4353 | * This action has no effect. It is variable length. The switch does not | |
4354 | * attempt to interpret the user-defined 'note' data in any way. A controller | |
4355 | * can use this action to attach arbitrary metadata to a flow. | |
4356 | * | |
4357 | * This action might go away in the future. | |
4358 | */ | |
4359 | struct nx_action_note { | |
4360 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4361 | ovs_be16 len; /* A multiple of 8, but at least 16. */ | |
4362 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4363 | ovs_be16 subtype; /* NXAST_NOTE. */ | |
4364 | uint8_t note[6]; /* Start of user-defined data. */ | |
4365 | /* Possibly followed by additional user-defined data. */ | |
4366 | }; | |
4367 | OFP_ASSERT(sizeof(struct nx_action_note) == 16); | |
4368 | ||
4369 | static enum ofperr | |
f3cd3ac7 JS |
4370 | decode_NXAST_RAW_NOTE(const struct nx_action_note *nan, |
4371 | enum ofp_version ofp_version OVS_UNUSED, | |
4372 | struct ofpbuf *out) | |
c2d936a4 BP |
4373 | { |
4374 | struct ofpact_note *note; | |
4375 | unsigned int length; | |
4376 | ||
4377 | length = ntohs(nan->len) - offsetof(struct nx_action_note, note); | |
2bd318de | 4378 | note = ofpact_put_NOTE(out); |
c2d936a4 | 4379 | note->length = length; |
2bd318de | 4380 | ofpbuf_put(out, nan->note, length); |
34abaa3d | 4381 | ofpact_finish(out, out->header); |
c2d936a4 BP |
4382 | |
4383 | return 0; | |
4384 | } | |
4385 | ||
4386 | static void | |
4387 | encode_NOTE(const struct ofpact_note *note, | |
4388 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4389 | { | |
6fd6ed71 | 4390 | size_t start_ofs = out->size; |
c2d936a4 | 4391 | struct nx_action_note *nan; |
c2d936a4 BP |
4392 | |
4393 | put_NXAST_NOTE(out); | |
6fd6ed71 | 4394 | out->size = out->size - sizeof nan->note; |
c2d936a4 BP |
4395 | |
4396 | ofpbuf_put(out, note->data, note->length); | |
9ac0aada | 4397 | pad_ofpat(out, start_ofs); |
c2d936a4 BP |
4398 | } |
4399 | ||
cab50449 | 4400 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4401 | parse_NOTE(const char *arg, struct ofpbuf *ofpacts, |
4402 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4403 | { | |
4404 | struct ofpact_note *note; | |
4405 | ||
4406 | note = ofpact_put_NOTE(ofpacts); | |
4407 | while (*arg != '\0') { | |
4408 | uint8_t byte; | |
4409 | bool ok; | |
4410 | ||
4411 | if (*arg == '.') { | |
4412 | arg++; | |
4413 | } | |
4414 | if (*arg == '\0') { | |
4415 | break; | |
4416 | } | |
4417 | ||
4418 | byte = hexits_value(arg, 2, &ok); | |
4419 | if (!ok) { | |
4420 | return xstrdup("bad hex digit in `note' argument"); | |
4421 | } | |
4422 | ofpbuf_put(ofpacts, &byte, 1); | |
4423 | ||
6fd6ed71 | 4424 | note = ofpacts->header; |
c2d936a4 BP |
4425 | note->length++; |
4426 | ||
4427 | arg += 2; | |
4428 | } | |
34abaa3d | 4429 | ofpact_finish(ofpacts, ¬e->ofpact); |
c2d936a4 BP |
4430 | return NULL; |
4431 | } | |
4432 | ||
4433 | static void | |
4434 | format_NOTE(const struct ofpact_note *a, struct ds *s) | |
4435 | { | |
4436 | size_t i; | |
4437 | ||
4438 | ds_put_cstr(s, "note:"); | |
4439 | for (i = 0; i < a->length; i++) { | |
4440 | if (i) { | |
4441 | ds_put_char(s, '.'); | |
4442 | } | |
4443 | ds_put_format(s, "%02"PRIx8, a->data[i]); | |
4444 | } | |
4445 | } | |
4446 | \f | |
4447 | /* Exit action. */ | |
4448 | ||
4449 | static enum ofperr | |
4450 | decode_NXAST_RAW_EXIT(struct ofpbuf *out) | |
4451 | { | |
4452 | ofpact_put_EXIT(out); | |
4453 | return 0; | |
4454 | } | |
4455 | ||
4456 | static void | |
4457 | encode_EXIT(const struct ofpact_null *null OVS_UNUSED, | |
4458 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4459 | { | |
4460 | put_NXAST_EXIT(out); | |
4461 | } | |
4462 | ||
cab50449 | 4463 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4464 | parse_EXIT(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
4465 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4466 | { | |
4467 | ofpact_put_EXIT(ofpacts); | |
4468 | return NULL; | |
4469 | } | |
4470 | ||
4471 | static void | |
4472 | format_EXIT(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
4473 | { | |
4474 | ds_put_cstr(s, "exit"); | |
4475 | } | |
4476 | \f | |
e672ff9b JR |
4477 | /* Unroll xlate action. */ |
4478 | ||
4479 | static void | |
4480 | encode_UNROLL_XLATE(const struct ofpact_unroll_xlate *unroll OVS_UNUSED, | |
4481 | enum ofp_version ofp_version OVS_UNUSED, | |
4482 | struct ofpbuf *out OVS_UNUSED) | |
4483 | { | |
4484 | OVS_NOT_REACHED(); | |
4485 | } | |
4486 | ||
4487 | static char * OVS_WARN_UNUSED_RESULT | |
4488 | parse_UNROLL_XLATE(char *arg OVS_UNUSED, struct ofpbuf *ofpacts OVS_UNUSED, | |
4489 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4490 | { | |
4491 | OVS_NOT_REACHED(); | |
4492 | return NULL; | |
4493 | } | |
4494 | ||
4495 | static void | |
4496 | format_UNROLL_XLATE(const struct ofpact_unroll_xlate *a OVS_UNUSED, | |
4497 | struct ds *s) | |
4498 | { | |
4499 | ds_put_cstr(s, "unroll_xlate"); | |
4500 | } | |
4501 | \f | |
c2d936a4 BP |
4502 | /* Action structure for NXAST_SAMPLE. |
4503 | * | |
4504 | * Samples matching packets with the given probability and sends them | |
4505 | * each to the set of collectors identified with the given ID. The | |
4506 | * probability is expressed as a number of packets to be sampled out | |
4507 | * of USHRT_MAX packets, and must be >0. | |
4508 | * | |
4509 | * When sending packet samples to IPFIX collectors, the IPFIX flow | |
4510 | * record sent for each sampled packet is associated with the given | |
4511 | * observation domain ID and observation point ID. Each IPFIX flow | |
4512 | * record contain the sampled packet's headers when executing this | |
4513 | * rule. If a sampled packet's headers are modified by previous | |
4514 | * actions in the flow, those modified headers are sent. */ | |
4515 | struct nx_action_sample { | |
4516 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4517 | ovs_be16 len; /* Length is 24. */ | |
4518 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4519 | ovs_be16 subtype; /* NXAST_SAMPLE. */ | |
4520 | ovs_be16 probability; /* Fraction of packets to sample. */ | |
4521 | ovs_be32 collector_set_id; /* ID of collector set in OVSDB. */ | |
4522 | ovs_be32 obs_domain_id; /* ID of sampling observation domain. */ | |
4523 | ovs_be32 obs_point_id; /* ID of sampling observation point. */ | |
4524 | }; | |
4525 | OFP_ASSERT(sizeof(struct nx_action_sample) == 24); | |
4526 | ||
4527 | static enum ofperr | |
f3cd3ac7 JS |
4528 | decode_NXAST_RAW_SAMPLE(const struct nx_action_sample *nas, |
4529 | enum ofp_version ofp_version OVS_UNUSED, | |
4530 | struct ofpbuf *out) | |
c2d936a4 BP |
4531 | { |
4532 | struct ofpact_sample *sample; | |
4533 | ||
4534 | sample = ofpact_put_SAMPLE(out); | |
4535 | sample->probability = ntohs(nas->probability); | |
4536 | sample->collector_set_id = ntohl(nas->collector_set_id); | |
4537 | sample->obs_domain_id = ntohl(nas->obs_domain_id); | |
4538 | sample->obs_point_id = ntohl(nas->obs_point_id); | |
4539 | ||
4540 | if (sample->probability == 0) { | |
4541 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4542 | } | |
4543 | ||
4544 | return 0; | |
4545 | } | |
4546 | ||
4547 | static void | |
4548 | encode_SAMPLE(const struct ofpact_sample *sample, | |
4549 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4550 | { | |
4551 | struct nx_action_sample *nas; | |
4552 | ||
4553 | nas = put_NXAST_SAMPLE(out); | |
4554 | nas->probability = htons(sample->probability); | |
4555 | nas->collector_set_id = htonl(sample->collector_set_id); | |
4556 | nas->obs_domain_id = htonl(sample->obs_domain_id); | |
4557 | nas->obs_point_id = htonl(sample->obs_point_id); | |
4558 | } | |
4559 | ||
4560 | /* Parses 'arg' as the argument to a "sample" action, and appends such an | |
4561 | * action to 'ofpacts'. | |
4562 | * | |
4563 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
4564 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 4565 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4566 | parse_SAMPLE(char *arg, struct ofpbuf *ofpacts, |
4567 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4568 | { | |
4569 | struct ofpact_sample *os = ofpact_put_SAMPLE(ofpacts); | |
4570 | char *key, *value; | |
4571 | ||
4572 | while (ofputil_parse_key_value(&arg, &key, &value)) { | |
4573 | char *error = NULL; | |
4574 | ||
4575 | if (!strcmp(key, "probability")) { | |
4576 | error = str_to_u16(value, "probability", &os->probability); | |
4577 | if (!error && os->probability == 0) { | |
4578 | error = xasprintf("invalid probability value \"%s\"", value); | |
4579 | } | |
4580 | } else if (!strcmp(key, "collector_set_id")) { | |
4581 | error = str_to_u32(value, &os->collector_set_id); | |
4582 | } else if (!strcmp(key, "obs_domain_id")) { | |
4583 | error = str_to_u32(value, &os->obs_domain_id); | |
4584 | } else if (!strcmp(key, "obs_point_id")) { | |
4585 | error = str_to_u32(value, &os->obs_point_id); | |
4586 | } else { | |
4587 | error = xasprintf("invalid key \"%s\" in \"sample\" argument", | |
4588 | key); | |
4589 | } | |
4590 | if (error) { | |
4591 | return error; | |
4592 | } | |
4593 | } | |
4594 | if (os->probability == 0) { | |
4595 | return xstrdup("non-zero \"probability\" must be specified on sample"); | |
4596 | } | |
4597 | return NULL; | |
4598 | } | |
4599 | ||
4600 | static void | |
4601 | format_SAMPLE(const struct ofpact_sample *a, struct ds *s) | |
4602 | { | |
4603 | ds_put_format(s, "sample(probability=%"PRIu16",collector_set_id=%"PRIu32 | |
4604 | ",obs_domain_id=%"PRIu32",obs_point_id=%"PRIu32")", | |
4605 | a->probability, a->collector_set_id, | |
4606 | a->obs_domain_id, a->obs_point_id); | |
4607 | } | |
4608 | \f | |
d4abaff5 BP |
4609 | /* debug_recirc instruction. */ |
4610 | ||
4611 | static bool enable_debug; | |
4612 | ||
4613 | void | |
4614 | ofpact_dummy_enable(void) | |
4615 | { | |
4616 | enable_debug = true; | |
4617 | } | |
4618 | ||
4619 | static enum ofperr | |
4620 | decode_NXAST_RAW_DEBUG_RECIRC(struct ofpbuf *out) | |
4621 | { | |
4622 | if (!enable_debug) { | |
4623 | return OFPERR_OFPBAC_BAD_VENDOR_TYPE; | |
4624 | } | |
4625 | ||
4626 | ofpact_put_DEBUG_RECIRC(out); | |
4627 | return 0; | |
4628 | } | |
4629 | ||
4630 | static void | |
4631 | encode_DEBUG_RECIRC(const struct ofpact_null *n OVS_UNUSED, | |
4632 | enum ofp_version ofp_version OVS_UNUSED, | |
4633 | struct ofpbuf *out) | |
4634 | { | |
4635 | put_NXAST_DEBUG_RECIRC(out); | |
4636 | } | |
4637 | ||
4638 | static char * OVS_WARN_UNUSED_RESULT | |
4639 | parse_DEBUG_RECIRC(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, | |
4640 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4641 | { | |
4642 | ofpact_put_DEBUG_RECIRC(ofpacts); | |
4643 | return NULL; | |
4644 | } | |
4645 | ||
4646 | static void | |
4647 | format_DEBUG_RECIRC(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
4648 | { | |
4649 | ds_put_cstr(s, "debug_recirc"); | |
4650 | } | |
07659514 JS |
4651 | |
4652 | /* Action structure for NXAST_CT. | |
4653 | * | |
4654 | * Pass traffic to the connection tracker. | |
4655 | * | |
4656 | * There are two important concepts to understanding the connection tracking | |
4657 | * interface: Packet state and Connection state. Packets may be "Untracked" or | |
4658 | * "Tracked". Connections may be "Uncommitted" or "Committed". | |
4659 | * | |
4660 | * - Packet State: | |
4661 | * | |
4662 | * Untracked packets have not yet passed through the connection tracker, | |
4663 | * and the connection state for such packets is unknown. In most cases, | |
4664 | * packets entering the OpenFlow pipeline will initially be in the | |
4665 | * untracked state. Untracked packets may become tracked by executing | |
4666 | * NXAST_CT with a "recirc_table" specified. This makes various aspects | |
4667 | * about the connection available, in particular the connection state. | |
4668 | * | |
4669 | * Tracked packets have previously passed through the connection tracker. | |
4670 | * These packets will remain tracked through until the end of the OpenFlow | |
4671 | * pipeline. Tracked packets which have NXAST_CT executed with a | |
4672 | * "recirc_table" specified will return to the tracked state. | |
4673 | * | |
4674 | * The packet state is only significant for the duration of packet | |
4675 | * processing within the OpenFlow pipeline. | |
4676 | * | |
4677 | * - Connection State: | |
4678 | * | |
4679 | * Multiple packets may be associated with a single connection. Initially, | |
4680 | * all connections are uncommitted. The connection state corresponding to | |
4681 | * a packet is available in the NXM_NX_CT_STATE field for tracked packets. | |
4682 | * | |
4683 | * Uncommitted connections have no state stored about them. Uncommitted | |
4684 | * connections may transition into the committed state by executing | |
4685 | * NXAST_CT with the NX_CT_F_COMMIT flag. | |
4686 | * | |
4687 | * Once a connection becomes committed, information may be gathered about | |
4688 | * the connection by passing subsequent packets through the connection | |
4689 | * tracker, and the state of the connection will be stored beyond the | |
4690 | * lifetime of packet processing. | |
4691 | * | |
4692 | * Connections may transition back into the uncommitted state due to | |
4693 | * external timers, or due to the contents of packets that are sent to the | |
4694 | * connection tracker. This behaviour is outside of the scope of the | |
4695 | * OpenFlow interface. | |
4696 | * | |
4697 | * The "zone" specifies a context within which the tracking is done: | |
4698 | * | |
4699 | * The connection tracking zone is a 16-bit number. Each zone is an | |
4700 | * independent connection tracking context. The connection state for each | |
4701 | * connection is completely separate for each zone, so if a connection | |
4702 | * is committed to zone A, then it will remain uncommitted in zone B. | |
4703 | * If NXAST_CT is executed with the same zone multiple times, later | |
4704 | * executions have no effect. | |
4705 | * | |
4706 | * If 'zone_src' is nonzero, this specifies that the zone should be | |
4707 | * sourced from a field zone_src[ofs:ofs+nbits]. The format and semantics | |
4708 | * of 'zone_src' and 'zone_ofs_nbits' are similar to those for the | |
4709 | * NXAST_REG_LOAD action. The acceptable nxm_header values for 'zone_src' | |
4710 | * are the same as the acceptable nxm_header values for the 'src' field of | |
4711 | * NXAST_REG_MOVE. | |
4712 | * | |
4713 | * If 'zone_src' is zero, then the value of 'zone_imm' will be used as the | |
4714 | * connection tracking zone. | |
4715 | * | |
4716 | * The "recirc_table" allows NXM_NX_CT_* fields to become available: | |
4717 | * | |
4718 | * If "recirc_table" has a value other than NX_CT_RECIRC_NONE, then the | |
4719 | * packet will be logically cloned prior to executing this action. One | |
4720 | * copy will be sent to the connection tracker, then will be re-injected | |
4721 | * into the OpenFlow pipeline beginning at the OpenFlow table specified in | |
4722 | * this field. When the packet re-enters the pipeline, the NXM_NX_CT_* | |
4723 | * fields will be populated. The original instance of the packet will | |
4724 | * continue the current actions list. This can be thought of as similar to | |
4725 | * the effect of the "output" action: One copy is sent out (in this case, | |
4726 | * to the connection tracker), but the current copy continues processing. | |
4727 | * | |
4728 | * It is strongly recommended that this table is later than the current | |
4729 | * table, to prevent loops. | |
8e53fe8c | 4730 | * |
d787ad39 JS |
4731 | * The "alg" attaches protocol-specific behaviour to this action: |
4732 | * | |
4733 | * The ALG is a 16-bit number which specifies that additional | |
4734 | * processing should be applied to this traffic. | |
4735 | * | |
4736 | * Protocol | Value | Meaning | |
4737 | * -------------------------------------------------------------------- | |
4738 | * None | 0 | No protocol-specific behaviour. | |
4739 | * FTP | 21 | Parse FTP control connections and observe the | |
4740 | * | | negotiation of related data connections. | |
4741 | * Other | Other | Unsupported protocols. | |
4742 | * | |
4743 | * By way of example, if FTP control connections have this action applied | |
4744 | * with the ALG set to FTP (21), then the connection tracker will observe | |
4745 | * the negotiation of data connections. This allows the connection | |
4746 | * tracker to identify subsequent data connections as "related" to this | |
4747 | * existing connection. The "related" flag will be populated in the | |
4748 | * NXM_NX_CT_STATE field for such connections if the 'recirc_table' is | |
4749 | * specified. | |
4750 | * | |
8e53fe8c JS |
4751 | * Zero or more actions may immediately follow this action. These actions will |
4752 | * be executed within the context of the connection tracker, and they require | |
4753 | * the NX_CT_F_COMMIT flag to be set. | |
07659514 JS |
4754 | */ |
4755 | struct nx_action_conntrack { | |
4756 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4757 | ovs_be16 len; /* At least 24. */ | |
4758 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4759 | ovs_be16 subtype; /* NXAST_CT. */ | |
4760 | ovs_be16 flags; /* Zero or more NX_CT_F_* flags. | |
4761 | * Unspecified flag bits must be zero. */ | |
4762 | ovs_be32 zone_src; /* Connection tracking context. */ | |
4763 | union { | |
4764 | ovs_be16 zone_ofs_nbits;/* Range to use from source field. */ | |
4765 | ovs_be16 zone_imm; /* Immediate value for zone. */ | |
4766 | }; | |
4767 | uint8_t recirc_table; /* Recirculate to a specific table, or | |
4768 | NX_CT_RECIRC_NONE for no recirculation. */ | |
d787ad39 JS |
4769 | uint8_t pad[3]; /* Zeroes */ |
4770 | ovs_be16 alg; /* Well-known port number for the protocol. | |
4771 | * 0 indicates no ALG is required. */ | |
07659514 JS |
4772 | /* Followed by a sequence of zero or more OpenFlow actions. The length of |
4773 | * these is included in 'len'. */ | |
4774 | }; | |
4775 | OFP_ASSERT(sizeof(struct nx_action_conntrack) == 24); | |
4776 | ||
4777 | static enum ofperr | |
4778 | decode_ct_zone(const struct nx_action_conntrack *nac, | |
4779 | struct ofpact_conntrack *out) | |
4780 | { | |
4781 | if (nac->zone_src) { | |
4782 | enum ofperr error; | |
4783 | ||
4784 | out->zone_src.field = mf_from_nxm_header(ntohl(nac->zone_src)); | |
4785 | out->zone_src.ofs = nxm_decode_ofs(nac->zone_ofs_nbits); | |
4786 | out->zone_src.n_bits = nxm_decode_n_bits(nac->zone_ofs_nbits); | |
4787 | error = mf_check_src(&out->zone_src, NULL); | |
4788 | if (error) { | |
4789 | return error; | |
4790 | } | |
4791 | ||
4792 | if (out->zone_src.n_bits != 16) { | |
4793 | VLOG_WARN_RL(&rl, "zone n_bits %d not within valid range [16..16]", | |
4794 | out->zone_src.n_bits); | |
4795 | return OFPERR_OFPBAC_BAD_SET_LEN; | |
4796 | } | |
4797 | } else { | |
4798 | out->zone_src.field = NULL; | |
4799 | out->zone_imm = ntohs(nac->zone_imm); | |
4800 | } | |
4801 | ||
4802 | return 0; | |
4803 | } | |
4804 | ||
4805 | static enum ofperr | |
4806 | decode_NXAST_RAW_CT(const struct nx_action_conntrack *nac, | |
8e53fe8c | 4807 | enum ofp_version ofp_version, struct ofpbuf *out) |
07659514 | 4808 | { |
8e53fe8c | 4809 | const size_t ct_offset = ofpacts_pull(out); |
07659514 | 4810 | struct ofpact_conntrack *conntrack; |
8e53fe8c | 4811 | struct ofpbuf openflow; |
07659514 JS |
4812 | int error = 0; |
4813 | ||
4814 | conntrack = ofpact_put_CT(out); | |
4815 | conntrack->flags = ntohs(nac->flags); | |
4816 | error = decode_ct_zone(nac, conntrack); | |
4817 | if (error) { | |
4818 | goto out; | |
4819 | } | |
4820 | conntrack->recirc_table = nac->recirc_table; | |
d787ad39 | 4821 | conntrack->alg = ntohs(nac->alg); |
07659514 | 4822 | |
8e53fe8c JS |
4823 | ofpbuf_pull(out, sizeof(*conntrack)); |
4824 | ||
4825 | ofpbuf_use_const(&openflow, nac + 1, ntohs(nac->len) - sizeof(*nac)); | |
4826 | error = ofpacts_pull_openflow_actions__(&openflow, openflow.size, | |
4827 | ofp_version, | |
4828 | 1u << OVSINST_OFPIT11_APPLY_ACTIONS, | |
4829 | out, OFPACT_CT); | |
4830 | if (error) { | |
4831 | goto out; | |
4832 | } | |
4833 | ||
4834 | conntrack = ofpbuf_push_uninit(out, sizeof(*conntrack)); | |
4835 | out->header = &conntrack->ofpact; | |
34abaa3d | 4836 | ofpact_finish(out, &conntrack->ofpact); |
8e53fe8c JS |
4837 | |
4838 | if (conntrack->ofpact.len > sizeof(*conntrack) | |
4839 | && !(conntrack->flags & NX_CT_F_COMMIT)) { | |
9ac0aada JR |
4840 | const struct ofpact *a; |
4841 | size_t ofpacts_len = conntrack->ofpact.len - sizeof(*conntrack); | |
4842 | ||
4843 | OFPACT_FOR_EACH (a, conntrack->actions, ofpacts_len) { | |
4844 | if (a->type != OFPACT_NAT || ofpact_get_NAT(a)->flags | |
4845 | || ofpact_get_NAT(a)->range_af != AF_UNSPEC) { | |
4846 | VLOG_WARN_RL(&rl, "CT action requires commit flag if actions " | |
4847 | "other than NAT without arguments are specified."); | |
4848 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
4849 | goto out; | |
4850 | } | |
4851 | } | |
8e53fe8c JS |
4852 | } |
4853 | ||
07659514 | 4854 | out: |
8e53fe8c | 4855 | ofpbuf_push_uninit(out, ct_offset); |
07659514 JS |
4856 | return error; |
4857 | } | |
4858 | ||
4859 | static void | |
4860 | encode_CT(const struct ofpact_conntrack *conntrack, | |
8e53fe8c | 4861 | enum ofp_version ofp_version, struct ofpbuf *out) |
07659514 JS |
4862 | { |
4863 | struct nx_action_conntrack *nac; | |
8e53fe8c JS |
4864 | const size_t ofs = out->size; |
4865 | size_t len; | |
07659514 JS |
4866 | |
4867 | nac = put_NXAST_CT(out); | |
4868 | nac->flags = htons(conntrack->flags); | |
4869 | if (conntrack->zone_src.field) { | |
4870 | nac->zone_src = htonl(mf_nxm_header(conntrack->zone_src.field->id)); | |
4871 | nac->zone_ofs_nbits = nxm_encode_ofs_nbits(conntrack->zone_src.ofs, | |
4872 | conntrack->zone_src.n_bits); | |
4873 | } else { | |
4874 | nac->zone_src = htonl(0); | |
4875 | nac->zone_imm = htons(conntrack->zone_imm); | |
4876 | } | |
4877 | nac->recirc_table = conntrack->recirc_table; | |
d787ad39 | 4878 | nac->alg = htons(conntrack->alg); |
8e53fe8c JS |
4879 | |
4880 | len = ofpacts_put_openflow_actions(conntrack->actions, | |
4881 | ofpact_ct_get_action_len(conntrack), | |
4882 | out, ofp_version); | |
4883 | len += sizeof(*nac); | |
4884 | nac = ofpbuf_at(out, ofs, sizeof(*nac)); | |
4885 | nac->len = htons(len); | |
07659514 JS |
4886 | } |
4887 | ||
9ac0aada JR |
4888 | static char * OVS_WARN_UNUSED_RESULT parse_NAT(char *arg, struct ofpbuf *, |
4889 | enum ofputil_protocol * OVS_UNUSED); | |
4890 | ||
07659514 JS |
4891 | /* Parses 'arg' as the argument to a "ct" action, and appends such an |
4892 | * action to 'ofpacts'. | |
4893 | * | |
4894 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
4895 | * error. The caller is responsible for freeing the returned string. */ | |
4896 | static char * OVS_WARN_UNUSED_RESULT | |
4897 | parse_CT(char *arg, struct ofpbuf *ofpacts, | |
8e53fe8c | 4898 | enum ofputil_protocol *usable_protocols) |
07659514 | 4899 | { |
8e53fe8c | 4900 | const size_t ct_offset = ofpacts_pull(ofpacts); |
07659514 JS |
4901 | struct ofpact_conntrack *oc; |
4902 | char *error = NULL; | |
4903 | char *key, *value; | |
4904 | ||
4905 | oc = ofpact_put_CT(ofpacts); | |
4906 | oc->flags = 0; | |
4907 | oc->recirc_table = NX_CT_RECIRC_NONE; | |
4908 | while (ofputil_parse_key_value(&arg, &key, &value)) { | |
4909 | if (!strcmp(key, "commit")) { | |
4910 | oc->flags |= NX_CT_F_COMMIT; | |
4911 | } else if (!strcmp(key, "table")) { | |
4912 | error = str_to_u8(value, "recirc_table", &oc->recirc_table); | |
4913 | if (!error && oc->recirc_table == NX_CT_RECIRC_NONE) { | |
4914 | error = xasprintf("invalid table %#"PRIx16, oc->recirc_table); | |
4915 | } | |
4916 | } else if (!strcmp(key, "zone")) { | |
4917 | error = str_to_u16(value, "zone", &oc->zone_imm); | |
4918 | ||
4919 | if (error) { | |
4920 | free(error); | |
4921 | error = mf_parse_subfield(&oc->zone_src, value); | |
4922 | if (error) { | |
4923 | return error; | |
4924 | } | |
4925 | } | |
d787ad39 JS |
4926 | } else if (!strcmp(key, "alg")) { |
4927 | error = str_to_connhelper(value, &oc->alg); | |
9ac0aada JR |
4928 | } else if (!strcmp(key, "nat")) { |
4929 | const size_t nat_offset = ofpacts_pull(ofpacts); | |
4930 | ||
4931 | error = parse_NAT(value, ofpacts, usable_protocols); | |
9ac0aada JR |
4932 | /* Update CT action pointer and length. */ |
4933 | ofpacts->header = ofpbuf_push_uninit(ofpacts, nat_offset); | |
4934 | oc = ofpacts->header; | |
8e53fe8c JS |
4935 | } else if (!strcmp(key, "exec")) { |
4936 | /* Hide existing actions from ofpacts_parse_copy(), so the | |
4937 | * nesting can be handled transparently. */ | |
76e3e669 | 4938 | enum ofputil_protocol usable_protocols2; |
9ac0aada | 4939 | const size_t exec_offset = ofpacts_pull(ofpacts); |
76e3e669 | 4940 | |
76e3e669 JR |
4941 | /* Initializes 'usable_protocol2', fold it back to |
4942 | * '*usable_protocols' afterwards, so that we do not lose | |
4943 | * restrictions already in there. */ | |
4944 | error = ofpacts_parse_copy(value, ofpacts, &usable_protocols2, | |
4945 | false, OFPACT_CT); | |
4946 | *usable_protocols &= usable_protocols2; | |
9ac0aada | 4947 | ofpacts->header = ofpbuf_push_uninit(ofpacts, exec_offset); |
8e53fe8c | 4948 | oc = ofpacts->header; |
07659514 JS |
4949 | } else { |
4950 | error = xasprintf("invalid argument to \"ct\" action: `%s'", key); | |
4951 | } | |
4952 | if (error) { | |
4953 | break; | |
4954 | } | |
4955 | } | |
4956 | ||
34abaa3d | 4957 | ofpact_finish(ofpacts, &oc->ofpact); |
8e53fe8c | 4958 | ofpbuf_push_uninit(ofpacts, ct_offset); |
07659514 JS |
4959 | return error; |
4960 | } | |
4961 | ||
d787ad39 JS |
4962 | static void |
4963 | format_alg(int port, struct ds *s) | |
4964 | { | |
4965 | if (port == IPPORT_FTP) { | |
4966 | ds_put_format(s, "alg=ftp,"); | |
4967 | } else if (port) { | |
4968 | ds_put_format(s, "alg=%d,", port); | |
4969 | } | |
4970 | } | |
4971 | ||
9ac0aada JR |
4972 | static void format_NAT(const struct ofpact_nat *a, struct ds *ds); |
4973 | ||
07659514 JS |
4974 | static void |
4975 | format_CT(const struct ofpact_conntrack *a, struct ds *s) | |
4976 | { | |
4977 | ds_put_cstr(s, "ct("); | |
4978 | if (a->flags & NX_CT_F_COMMIT) { | |
4979 | ds_put_cstr(s, "commit,"); | |
4980 | } | |
4981 | if (a->recirc_table != NX_CT_RECIRC_NONE) { | |
4982 | ds_put_format(s, "table=%"PRIu8",", a->recirc_table); | |
4983 | } | |
4984 | if (a->zone_src.field) { | |
4985 | ds_put_format(s, "zone="); | |
4986 | mf_format_subfield(&a->zone_src, s); | |
4987 | ds_put_char(s, ','); | |
4988 | } else if (a->zone_imm) { | |
4989 | ds_put_format(s, "zone=%"PRIu16",", a->zone_imm); | |
4990 | } | |
9ac0aada JR |
4991 | /* If the first action is a NAT action, format it outside of the 'exec' |
4992 | * envelope. */ | |
4993 | const struct ofpact *action = a->actions; | |
4994 | size_t actions_len = ofpact_ct_get_action_len(a); | |
4995 | if (actions_len && action->type == OFPACT_NAT) { | |
4996 | format_NAT(ofpact_get_NAT(action), s); | |
4997 | ds_put_char(s, ','); | |
4998 | actions_len -= OFPACT_ALIGN(action->len); | |
4999 | action = ofpact_next(action); | |
5000 | } | |
5001 | if (actions_len) { | |
8e53fe8c | 5002 | ds_put_cstr(s, "exec("); |
9ac0aada JR |
5003 | ofpacts_format(action, actions_len, s); |
5004 | ds_put_cstr(s, "),"); | |
8e53fe8c | 5005 | } |
d787ad39 | 5006 | format_alg(a->alg, s); |
07659514 JS |
5007 | ds_chomp(s, ','); |
5008 | ds_put_char(s, ')'); | |
5009 | } | |
9ac0aada JR |
5010 | \f |
5011 | /* NAT action. */ | |
5012 | ||
5013 | /* Which optional fields are present? */ | |
5014 | enum nx_nat_range { | |
5015 | NX_NAT_RANGE_IPV4_MIN = 1 << 0, /* ovs_be32 */ | |
5016 | NX_NAT_RANGE_IPV4_MAX = 1 << 1, /* ovs_be32 */ | |
5017 | NX_NAT_RANGE_IPV6_MIN = 1 << 2, /* struct in6_addr */ | |
5018 | NX_NAT_RANGE_IPV6_MAX = 1 << 3, /* struct in6_addr */ | |
5019 | NX_NAT_RANGE_PROTO_MIN = 1 << 4, /* ovs_be16 */ | |
5020 | NX_NAT_RANGE_PROTO_MAX = 1 << 5, /* ovs_be16 */ | |
5021 | }; | |
5022 | ||
5023 | /* Action structure for NXAST_NAT. */ | |
5024 | struct nx_action_nat { | |
5025 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
5026 | ovs_be16 len; /* At least 16. */ | |
5027 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
5028 | ovs_be16 subtype; /* NXAST_NAT. */ | |
5029 | uint8_t pad[2]; /* Must be zero. */ | |
5030 | ovs_be16 flags; /* Zero or more NX_NAT_F_* flags. | |
5031 | * Unspecified flag bits must be zero. */ | |
5032 | ovs_be16 range_present; /* NX_NAT_RANGE_* */ | |
5033 | /* Followed by optional parameters as specified by 'range_present' */ | |
5034 | }; | |
5035 | OFP_ASSERT(sizeof(struct nx_action_nat) == 16); | |
5036 | ||
5037 | static void | |
5038 | encode_NAT(const struct ofpact_nat *nat, | |
5039 | enum ofp_version ofp_version OVS_UNUSED, | |
5040 | struct ofpbuf *out) | |
5041 | { | |
5042 | struct nx_action_nat *nan; | |
5043 | const size_t ofs = out->size; | |
5044 | uint16_t range_present = 0; | |
5045 | ||
5046 | nan = put_NXAST_NAT(out); | |
5047 | nan->flags = htons(nat->flags); | |
5048 | if (nat->range_af == AF_INET) { | |
5049 | if (nat->range.addr.ipv4.min) { | |
5050 | ovs_be32 *min = ofpbuf_put_uninit(out, sizeof *min); | |
5051 | *min = nat->range.addr.ipv4.min; | |
5052 | range_present |= NX_NAT_RANGE_IPV4_MIN; | |
5053 | } | |
5054 | if (nat->range.addr.ipv4.max) { | |
5055 | ovs_be32 *max = ofpbuf_put_uninit(out, sizeof *max); | |
5056 | *max = nat->range.addr.ipv4.max; | |
5057 | range_present |= NX_NAT_RANGE_IPV4_MAX; | |
5058 | } | |
5059 | } else if (nat->range_af == AF_INET6) { | |
5060 | if (!ipv6_mask_is_any(&nat->range.addr.ipv6.min)) { | |
5061 | struct in6_addr *min = ofpbuf_put_uninit(out, sizeof *min); | |
5062 | *min = nat->range.addr.ipv6.min; | |
5063 | range_present |= NX_NAT_RANGE_IPV6_MIN; | |
5064 | } | |
5065 | if (!ipv6_mask_is_any(&nat->range.addr.ipv6.max)) { | |
5066 | struct in6_addr *max = ofpbuf_put_uninit(out, sizeof *max); | |
5067 | *max = nat->range.addr.ipv6.max; | |
5068 | range_present |= NX_NAT_RANGE_IPV6_MAX; | |
5069 | } | |
5070 | } | |
5071 | if (nat->range_af != AF_UNSPEC) { | |
5072 | if (nat->range.proto.min) { | |
5073 | ovs_be16 *min = ofpbuf_put_uninit(out, sizeof *min); | |
5074 | *min = htons(nat->range.proto.min); | |
5075 | range_present |= NX_NAT_RANGE_PROTO_MIN; | |
5076 | } | |
5077 | if (nat->range.proto.max) { | |
5078 | ovs_be16 *max = ofpbuf_put_uninit(out, sizeof *max); | |
5079 | *max = htons(nat->range.proto.max); | |
5080 | range_present |= NX_NAT_RANGE_PROTO_MAX; | |
5081 | } | |
5082 | } | |
5083 | pad_ofpat(out, ofs); | |
5084 | nan = ofpbuf_at(out, ofs, sizeof *nan); | |
5085 | nan->range_present = htons(range_present); | |
5086 | } | |
5087 | ||
5088 | static enum ofperr | |
5089 | decode_NXAST_RAW_NAT(const struct nx_action_nat *nan, | |
5090 | enum ofp_version ofp_version OVS_UNUSED, | |
5091 | struct ofpbuf *out) | |
5092 | { | |
5093 | struct ofpact_nat *nat; | |
5094 | uint16_t range_present = ntohs(nan->range_present); | |
5095 | const char *opts = (char *)(nan + 1); | |
5096 | uint16_t len = ntohs(nan->len) - sizeof *nan; | |
5097 | ||
5098 | nat = ofpact_put_NAT(out); | |
5099 | nat->flags = ntohs(nan->flags); | |
5100 | ||
5101 | #define NX_NAT_GET_OPT(DST, SRC, LEN, TYPE) \ | |
5102 | (LEN >= sizeof(TYPE) \ | |
5103 | ? (memcpy(DST, SRC, sizeof(TYPE)), LEN -= sizeof(TYPE), \ | |
5104 | SRC += sizeof(TYPE)) \ | |
5105 | : NULL) | |
5106 | ||
5107 | nat->range_af = AF_UNSPEC; | |
5108 | if (range_present & NX_NAT_RANGE_IPV4_MIN) { | |
5109 | if (range_present & (NX_NAT_RANGE_IPV6_MIN | NX_NAT_RANGE_IPV6_MAX)) { | |
5110 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5111 | } | |
5112 | ||
5113 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv4.min, opts, len, ovs_be32) | |
5114 | || !nat->range.addr.ipv4.min) { | |
5115 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5116 | } | |
5117 | ||
5118 | nat->range_af = AF_INET; | |
5119 | ||
5120 | if (range_present & NX_NAT_RANGE_IPV4_MAX) { | |
5121 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv4.max, opts, len, | |
5122 | ovs_be32)) { | |
5123 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5124 | } | |
5125 | if (ntohl(nat->range.addr.ipv4.max) | |
5126 | < ntohl(nat->range.addr.ipv4.min)) { | |
5127 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5128 | } | |
5129 | } | |
5130 | } else if (range_present & NX_NAT_RANGE_IPV4_MAX) { | |
5131 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5132 | } else if (range_present & NX_NAT_RANGE_IPV6_MIN) { | |
5133 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv6.min, opts, len, | |
5134 | struct in6_addr) | |
5135 | || ipv6_mask_is_any(&nat->range.addr.ipv6.min)) { | |
5136 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5137 | } | |
5138 | ||
5139 | nat->range_af = AF_INET6; | |
5140 | ||
5141 | if (range_present & NX_NAT_RANGE_IPV6_MAX) { | |
5142 | if (!NX_NAT_GET_OPT(&nat->range.addr.ipv6.max, opts, len, | |
5143 | struct in6_addr)) { | |
5144 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5145 | } | |
5146 | if (memcmp(&nat->range.addr.ipv6.max, &nat->range.addr.ipv6.min, | |
5147 | sizeof(struct in6_addr)) < 0) { | |
5148 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5149 | } | |
5150 | } | |
5151 | } else if (range_present & NX_NAT_RANGE_IPV6_MAX) { | |
5152 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5153 | } | |
5154 | ||
5155 | if (range_present & NX_NAT_RANGE_PROTO_MIN) { | |
5156 | ovs_be16 proto; | |
5157 | ||
5158 | if (nat->range_af == AF_UNSPEC) { | |
5159 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5160 | } | |
5161 | if (!NX_NAT_GET_OPT(&proto, opts, len, ovs_be16) || proto == 0) { | |
5162 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5163 | } | |
5164 | nat->range.proto.min = ntohs(proto); | |
5165 | if (range_present & NX_NAT_RANGE_PROTO_MAX) { | |
5166 | if (!NX_NAT_GET_OPT(&proto, opts, len, ovs_be16)) { | |
5167 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5168 | } | |
5169 | nat->range.proto.max = ntohs(proto); | |
5170 | if (nat->range.proto.max < nat->range.proto.min) { | |
5171 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5172 | } | |
5173 | } | |
5174 | } else if (range_present & NX_NAT_RANGE_PROTO_MAX) { | |
5175 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
5176 | } | |
5177 | ||
5178 | return 0; | |
5179 | } | |
5180 | ||
5181 | static void | |
5182 | format_NAT(const struct ofpact_nat *a, struct ds *ds) | |
5183 | { | |
5184 | ds_put_cstr(ds, "nat"); | |
5185 | ||
5186 | if (a->flags & (NX_NAT_F_SRC | NX_NAT_F_DST)) { | |
5187 | ds_put_char(ds, '('); | |
5188 | ds_put_cstr(ds, a->flags & NX_NAT_F_SRC ? "src" : "dst"); | |
5189 | ||
5190 | if (a->range_af != AF_UNSPEC) { | |
5191 | ds_put_cstr(ds, "="); | |
5192 | ||
5193 | if (a->range_af == AF_INET) { | |
5194 | ds_put_format(ds, IP_FMT, IP_ARGS(a->range.addr.ipv4.min)); | |
5195 | ||
5196 | if (a->range.addr.ipv4.max | |
5197 | && a->range.addr.ipv4.max != a->range.addr.ipv4.min) { | |
5198 | ds_put_format(ds, "-"IP_FMT, | |
5199 | IP_ARGS(a->range.addr.ipv4.max)); | |
5200 | } | |
5201 | } else if (a->range_af == AF_INET6) { | |
5202 | ipv6_format_addr_bracket(&a->range.addr.ipv6.min, ds, | |
5203 | a->range.proto.min); | |
5204 | ||
5205 | if (!ipv6_mask_is_any(&a->range.addr.ipv6.max) | |
5206 | && memcmp(&a->range.addr.ipv6.max, &a->range.addr.ipv6.min, | |
5207 | sizeof(struct in6_addr)) != 0) { | |
5208 | ds_put_char(ds, '-'); | |
5209 | ipv6_format_addr_bracket(&a->range.addr.ipv6.max, ds, | |
5210 | a->range.proto.min); | |
5211 | } | |
5212 | } | |
5213 | if (a->range.proto.min) { | |
5214 | ds_put_char(ds, ':'); | |
5215 | ds_put_format(ds, "%"PRIu16, a->range.proto.min); | |
5216 | ||
5217 | if (a->range.proto.max | |
5218 | && a->range.proto.max != a->range.proto.min) { | |
5219 | ds_put_format(ds, "-%"PRIu16, a->range.proto.max); | |
5220 | } | |
5221 | } | |
5222 | ds_put_char(ds, ','); | |
5223 | ||
5224 | if (a->flags & NX_NAT_F_PERSISTENT) { | |
5225 | ds_put_cstr(ds, "persistent,"); | |
5226 | } | |
5227 | if (a->flags & NX_NAT_F_PROTO_HASH) { | |
5228 | ds_put_cstr(ds, "hash,"); | |
5229 | } | |
5230 | if (a->flags & NX_NAT_F_PROTO_RANDOM) { | |
5231 | ds_put_cstr(ds, "random,"); | |
5232 | } | |
5233 | } | |
5234 | ds_chomp(ds, ','); | |
5235 | ds_put_char(ds, ')'); | |
5236 | } | |
5237 | } | |
5238 | ||
5239 | static char * OVS_WARN_UNUSED_RESULT | |
5240 | str_to_nat_range(const char *s, struct ofpact_nat *on) | |
5241 | { | |
5242 | char ipv6_s[IPV6_SCAN_LEN + 1]; | |
5243 | int n = 0; | |
5244 | ||
5245 | on->range_af = AF_UNSPEC; | |
5246 | if (ovs_scan_len(s, &n, IP_SCAN_FMT, | |
5247 | IP_SCAN_ARGS(&on->range.addr.ipv4.min))) { | |
5248 | on->range_af = AF_INET; | |
5249 | ||
5250 | if (s[n] == '-') { | |
5251 | n++; | |
5252 | if (!ovs_scan_len(s, &n, IP_SCAN_FMT, | |
5253 | IP_SCAN_ARGS(&on->range.addr.ipv4.max)) | |
5254 | || (ntohl(on->range.addr.ipv4.max) | |
5255 | < ntohl(on->range.addr.ipv4.min))) { | |
5256 | goto error; | |
5257 | } | |
5258 | } | |
5259 | } else if ((ovs_scan_len(s, &n, IPV6_SCAN_FMT, ipv6_s) | |
5260 | || ovs_scan_len(s, &n, "["IPV6_SCAN_FMT"]", ipv6_s)) | |
5261 | && inet_pton(AF_INET6, ipv6_s, &on->range.addr.ipv6.min) == 1) { | |
5262 | on->range_af = AF_INET6; | |
5263 | ||
5264 | if (s[n] == '-') { | |
5265 | n++; | |
5266 | if (!(ovs_scan_len(s, &n, IPV6_SCAN_FMT, ipv6_s) | |
5267 | || ovs_scan_len(s, &n, "["IPV6_SCAN_FMT"]", ipv6_s)) | |
5268 | || inet_pton(AF_INET6, ipv6_s, &on->range.addr.ipv6.max) != 1 | |
5269 | || memcmp(&on->range.addr.ipv6.max, &on->range.addr.ipv6.min, | |
5270 | sizeof on->range.addr.ipv6.max) < 0) { | |
5271 | goto error; | |
5272 | } | |
5273 | } | |
5274 | } | |
5275 | if (on->range_af != AF_UNSPEC && s[n] == ':') { | |
5276 | n++; | |
5277 | if (!ovs_scan_len(s, &n, "%"SCNu16, &on->range.proto.min)) { | |
5278 | goto error; | |
5279 | } | |
5280 | if (s[n] == '-') { | |
5281 | n++; | |
5282 | if (!ovs_scan_len(s, &n, "%"SCNu16, &on->range.proto.max) | |
5283 | || on->range.proto.max < on->range.proto.min) { | |
5284 | goto error; | |
5285 | } | |
5286 | } | |
5287 | } | |
5288 | if (strlen(s) != n) { | |
5289 | return xasprintf("garbage (%s) after nat range \"%s\" (pos: %d)", | |
5290 | &s[n], s, n); | |
5291 | } | |
5292 | return NULL; | |
5293 | error: | |
5294 | return xasprintf("invalid nat range \"%s\"", s); | |
5295 | } | |
5296 | ||
5297 | ||
5298 | /* Parses 'arg' as the argument to a "nat" action, and appends such an | |
5299 | * action to 'ofpacts'. | |
5300 | * | |
5301 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
5302 | * error. The caller is responsible for freeing the returned string. */ | |
5303 | static char * OVS_WARN_UNUSED_RESULT | |
5304 | parse_NAT(char *arg, struct ofpbuf *ofpacts, | |
5305 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
5306 | { | |
5307 | struct ofpact_nat *on = ofpact_put_NAT(ofpacts); | |
5308 | char *key, *value; | |
5309 | ||
5310 | on->flags = 0; | |
5311 | on->range_af = AF_UNSPEC; | |
5312 | ||
5313 | while (ofputil_parse_key_value(&arg, &key, &value)) { | |
5314 | char *error = NULL; | |
5315 | ||
5316 | if (!strcmp(key, "src")) { | |
5317 | on->flags |= NX_NAT_F_SRC; | |
5318 | error = str_to_nat_range(value, on); | |
5319 | } else if (!strcmp(key, "dst")) { | |
5320 | on->flags |= NX_NAT_F_DST; | |
5321 | error = str_to_nat_range(value, on); | |
5322 | } else if (!strcmp(key, "persistent")) { | |
5323 | on->flags |= NX_NAT_F_PERSISTENT; | |
5324 | } else if (!strcmp(key, "hash")) { | |
5325 | on->flags |= NX_NAT_F_PROTO_HASH; | |
5326 | } else if (!strcmp(key, "random")) { | |
5327 | on->flags |= NX_NAT_F_PROTO_RANDOM; | |
5328 | } else { | |
5329 | error = xasprintf("invalid key \"%s\" in \"nat\" argument", | |
5330 | key); | |
5331 | } | |
5332 | if (error) { | |
5333 | return error; | |
5334 | } | |
5335 | } | |
5336 | if (on->flags & NX_NAT_F_SRC && on->flags & NX_NAT_F_DST) { | |
5337 | return xasprintf("May only specify one of \"snat\" or \"dnat\"."); | |
5338 | } | |
5339 | if (!(on->flags & NX_NAT_F_SRC || on->flags & NX_NAT_F_DST)) { | |
5340 | if (on->flags) { | |
5341 | return xasprintf("Flags allowed only with \"snat\" or \"dnat\"."); | |
5342 | } | |
5343 | if (on->range_af != AF_UNSPEC) { | |
5344 | return xasprintf("Range allowed only with \"snat\" or \"dnat\"."); | |
5345 | } | |
5346 | } | |
5347 | return NULL; | |
5348 | } | |
5349 | ||
d4abaff5 | 5350 | \f |
c2d936a4 BP |
5351 | /* Meter instruction. */ |
5352 | ||
5353 | static void | |
5354 | encode_METER(const struct ofpact_meter *meter, | |
5355 | enum ofp_version ofp_version, struct ofpbuf *out) | |
5356 | { | |
5357 | if (ofp_version >= OFP13_VERSION) { | |
5358 | instruction_put_OFPIT13_METER(out)->meter_id = htonl(meter->meter_id); | |
5359 | } | |
5360 | } | |
5361 | ||
cab50449 | 5362 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5363 | parse_METER(char *arg, struct ofpbuf *ofpacts, |
5364 | enum ofputil_protocol *usable_protocols) | |
5365 | { | |
5366 | *usable_protocols &= OFPUTIL_P_OF13_UP; | |
5367 | return str_to_u32(arg, &ofpact_put_METER(ofpacts)->meter_id); | |
5368 | } | |
5369 | ||
5370 | static void | |
5371 | format_METER(const struct ofpact_meter *a, struct ds *s) | |
5372 | { | |
5373 | ds_put_format(s, "meter:%"PRIu32, a->meter_id); | |
5374 | } | |
5375 | \f | |
5376 | /* Clear-Actions instruction. */ | |
5377 | ||
5378 | static void | |
5379 | encode_CLEAR_ACTIONS(const struct ofpact_null *null OVS_UNUSED, | |
5380 | enum ofp_version ofp_version OVS_UNUSED, | |
5381 | struct ofpbuf *out OVS_UNUSED) | |
5382 | { | |
5383 | if (ofp_version > OFP10_VERSION) { | |
5384 | instruction_put_OFPIT11_CLEAR_ACTIONS(out); | |
5385 | } | |
5386 | } | |
5387 | ||
cab50449 | 5388 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5389 | parse_CLEAR_ACTIONS(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
5390 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
5391 | { | |
5392 | ofpact_put_CLEAR_ACTIONS(ofpacts); | |
5393 | return NULL; | |
5394 | } | |
5395 | ||
5396 | static void | |
5397 | format_CLEAR_ACTIONS(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
5398 | { | |
5399 | ds_put_cstr(s, "clear_actions"); | |
5400 | } | |
5401 | \f | |
5402 | /* Write-Actions instruction. */ | |
5403 | ||
5404 | static void | |
5405 | encode_WRITE_ACTIONS(const struct ofpact_nest *actions, | |
5406 | enum ofp_version ofp_version, struct ofpbuf *out) | |
5407 | { | |
5408 | if (ofp_version > OFP10_VERSION) { | |
6fd6ed71 | 5409 | const size_t ofs = out->size; |
c2d936a4 BP |
5410 | |
5411 | instruction_put_OFPIT11_WRITE_ACTIONS(out); | |
5412 | ofpacts_put_openflow_actions(actions->actions, | |
5413 | ofpact_nest_get_action_len(actions), | |
5414 | out, ofp_version); | |
5415 | ofpacts_update_instruction_actions(out, ofs); | |
5416 | } | |
5417 | } | |
5418 | ||
cab50449 | 5419 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5420 | parse_WRITE_ACTIONS(char *arg, struct ofpbuf *ofpacts, |
5421 | enum ofputil_protocol *usable_protocols) | |
5422 | { | |
d824b5b7 | 5423 | size_t ofs = ofpacts_pull(ofpacts); |
c2d936a4 BP |
5424 | struct ofpact_nest *on; |
5425 | char *error; | |
c2d936a4 BP |
5426 | |
5427 | /* Add a Write-Actions instruction and then pull it off. */ | |
5428 | ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS, sizeof *on); | |
5429 | ofpbuf_pull(ofpacts, sizeof *on); | |
5430 | ||
5431 | /* Parse nested actions. | |
5432 | * | |
5433 | * We pulled off "write-actions" and the previous actions because the | |
5434 | * OFPACT_WRITE_ACTIONS is only partially constructed: its length is such | |
5435 | * that it doesn't actually include the nested actions. That means that | |
5436 | * ofpacts_parse() would reject them as being part of an Apply-Actions that | |
5437 | * follows a Write-Actions, which is an invalid order. */ | |
d824b5b7 JS |
5438 | error = ofpacts_parse(arg, ofpacts, usable_protocols, false, |
5439 | OFPACT_WRITE_ACTIONS); | |
c2d936a4 BP |
5440 | |
5441 | /* Put the Write-Actions back on and update its length. */ | |
5442 | on = ofpbuf_push_uninit(ofpacts, sizeof *on); | |
6fd6ed71 | 5443 | on->ofpact.len = ofpacts->size; |
c2d936a4 BP |
5444 | |
5445 | /* Put any previous actions or instructions back on. */ | |
5446 | ofpbuf_push_uninit(ofpacts, ofs); | |
5447 | ||
5448 | return error; | |
5449 | } | |
5450 | ||
5451 | static void | |
5452 | format_WRITE_ACTIONS(const struct ofpact_nest *a, struct ds *s) | |
5453 | { | |
5454 | ds_put_cstr(s, "write_actions("); | |
5455 | ofpacts_format(a->actions, ofpact_nest_get_action_len(a), s); | |
5456 | ds_put_char(s, ')'); | |
5457 | } | |
5458 | \f | |
5459 | /* Action structure for NXAST_WRITE_METADATA. | |
5460 | * | |
5461 | * Modifies the 'mask' bits of the metadata value. */ | |
5462 | struct nx_action_write_metadata { | |
5463 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
5464 | ovs_be16 len; /* Length is 32. */ | |
5465 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
5466 | ovs_be16 subtype; /* NXAST_WRITE_METADATA. */ | |
5467 | uint8_t zeros[6]; /* Must be zero. */ | |
5468 | ovs_be64 metadata; /* Metadata register. */ | |
5469 | ovs_be64 mask; /* Metadata mask. */ | |
5470 | }; | |
5471 | OFP_ASSERT(sizeof(struct nx_action_write_metadata) == 32); | |
5472 | ||
5473 | static enum ofperr | |
5474 | decode_NXAST_RAW_WRITE_METADATA(const struct nx_action_write_metadata *nawm, | |
f3cd3ac7 | 5475 | enum ofp_version ofp_version OVS_UNUSED, |
c2d936a4 BP |
5476 | struct ofpbuf *out) |
5477 | { | |
5478 | struct ofpact_metadata *om; | |
5479 | ||
5480 | if (!is_all_zeros(nawm->zeros, sizeof nawm->zeros)) { | |
5481 | return OFPERR_NXBRC_MUST_BE_ZERO; | |
5482 | } | |
5483 | ||
5484 | om = ofpact_put_WRITE_METADATA(out); | |
5485 | om->metadata = nawm->metadata; | |
5486 | om->mask = nawm->mask; | |
5487 | ||
5488 | return 0; | |
5489 | } | |
5490 | ||
5491 | static void | |
5492 | encode_WRITE_METADATA(const struct ofpact_metadata *metadata, | |
5493 | enum ofp_version ofp_version, struct ofpbuf *out) | |
5494 | { | |
5495 | if (ofp_version == OFP10_VERSION) { | |
5496 | struct nx_action_write_metadata *nawm; | |
5497 | ||
5498 | nawm = put_NXAST_WRITE_METADATA(out); | |
5499 | nawm->metadata = metadata->metadata; | |
5500 | nawm->mask = metadata->mask; | |
5501 | } else { | |
5502 | struct ofp11_instruction_write_metadata *oiwm; | |
5503 | ||
5504 | oiwm = instruction_put_OFPIT11_WRITE_METADATA(out); | |
5505 | oiwm->metadata = metadata->metadata; | |
5506 | oiwm->metadata_mask = metadata->mask; | |
5507 | } | |
5508 | } | |
5509 | ||
cab50449 | 5510 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5511 | parse_WRITE_METADATA(char *arg, struct ofpbuf *ofpacts, |
5512 | enum ofputil_protocol *usable_protocols) | |
5513 | { | |
5514 | struct ofpact_metadata *om; | |
5515 | char *mask = strchr(arg, '/'); | |
5516 | ||
5517 | *usable_protocols &= OFPUTIL_P_NXM_OF11_UP; | |
5518 | ||
5519 | om = ofpact_put_WRITE_METADATA(ofpacts); | |
5520 | if (mask) { | |
5521 | char *error; | |
5522 | ||
5523 | *mask = '\0'; | |
5524 | error = str_to_be64(mask + 1, &om->mask); | |
5525 | if (error) { | |
5526 | return error; | |
5527 | } | |
5528 | } else { | |
5529 | om->mask = OVS_BE64_MAX; | |
5530 | } | |
5531 | ||
5532 | return str_to_be64(arg, &om->metadata); | |
5533 | } | |
5534 | ||
5535 | static void | |
5536 | format_WRITE_METADATA(const struct ofpact_metadata *a, struct ds *s) | |
5537 | { | |
5538 | ds_put_format(s, "write_metadata:%#"PRIx64, ntohll(a->metadata)); | |
5539 | if (a->mask != OVS_BE64_MAX) { | |
5540 | ds_put_format(s, "/%#"PRIx64, ntohll(a->mask)); | |
5541 | } | |
4cceacb9 | 5542 | } |
f25d0cf3 | 5543 | \f |
c2d936a4 | 5544 | /* Goto-Table instruction. */ |
f25d0cf3 BP |
5545 | |
5546 | static void | |
c2d936a4 BP |
5547 | encode_GOTO_TABLE(const struct ofpact_goto_table *goto_table, |
5548 | enum ofp_version ofp_version, struct ofpbuf *out) | |
f25d0cf3 | 5549 | { |
c2d936a4 BP |
5550 | if (ofp_version == OFP10_VERSION) { |
5551 | struct nx_action_resubmit *nar; | |
f25d0cf3 | 5552 | |
c2d936a4 BP |
5553 | nar = put_NXAST_RESUBMIT_TABLE(out); |
5554 | nar->table = goto_table->table_id; | |
5555 | nar->in_port = htons(ofp_to_u16(OFPP_IN_PORT)); | |
5556 | } else { | |
5557 | struct ofp11_instruction_goto_table *oigt; | |
5558 | ||
5559 | oigt = instruction_put_OFPIT11_GOTO_TABLE(out); | |
5560 | oigt->table_id = goto_table->table_id; | |
5561 | memset(oigt->pad, 0, sizeof oigt->pad); | |
5562 | } | |
5563 | } | |
5564 | ||
cab50449 | 5565 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
5566 | parse_GOTO_TABLE(char *arg, struct ofpbuf *ofpacts, |
5567 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
5568 | { | |
5569 | struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts); | |
5570 | char *table_s = strsep(&arg, ","); | |
5571 | if (!table_s || !table_s[0]) { | |
5572 | return xstrdup("instruction goto-table needs table id"); | |
5573 | } | |
5574 | return str_to_u8(table_s, "table", &ogt->table_id); | |
5575 | } | |
5576 | ||
5577 | static void | |
5578 | format_GOTO_TABLE(const struct ofpact_goto_table *a, struct ds *s) | |
5579 | { | |
5580 | ds_put_format(s, "goto_table:%"PRIu8, a->table_id); | |
5581 | } | |
5582 | \f | |
5583 | static void | |
5ad4b3f8 | 5584 | log_bad_action(const struct ofp_action_header *actions, size_t actions_len, |
c2d936a4 BP |
5585 | const struct ofp_action_header *bad_action, enum ofperr error) |
5586 | { | |
5587 | if (!VLOG_DROP_WARN(&rl)) { | |
5588 | struct ds s; | |
5589 | ||
5590 | ds_init(&s); | |
5ad4b3f8 | 5591 | ds_put_hex_dump(&s, actions, actions_len, 0, false); |
c2d936a4 BP |
5592 | VLOG_WARN("bad action at offset %#"PRIxPTR" (%s):\n%s", |
5593 | (char *)bad_action - (char *)actions, | |
5594 | ofperr_get_name(error), ds_cstr(&s)); | |
5595 | ds_destroy(&s); | |
5596 | } | |
5597 | } | |
5598 | ||
5599 | static enum ofperr | |
5600 | ofpacts_decode(const void *actions, size_t actions_len, | |
5601 | enum ofp_version ofp_version, struct ofpbuf *ofpacts) | |
5602 | { | |
5603 | struct ofpbuf openflow; | |
5604 | ||
5605 | ofpbuf_use_const(&openflow, actions, actions_len); | |
6fd6ed71 PS |
5606 | while (openflow.size) { |
5607 | const struct ofp_action_header *action = openflow.data; | |
c2d936a4 BP |
5608 | enum ofp_raw_action_type raw; |
5609 | enum ofperr error; | |
5610 | uint64_t arg; | |
5611 | ||
5612 | error = ofpact_pull_raw(&openflow, ofp_version, &raw, &arg); | |
5613 | if (!error) { | |
f3cd3ac7 | 5614 | error = ofpact_decode(action, raw, ofp_version, arg, ofpacts); |
c2d936a4 BP |
5615 | } |
5616 | ||
5617 | if (error) { | |
5ad4b3f8 | 5618 | log_bad_action(actions, actions_len, action, error); |
c2d936a4 BP |
5619 | return error; |
5620 | } | |
5621 | } | |
c2d936a4 BP |
5622 | return 0; |
5623 | } | |
5624 | ||
5625 | static enum ofperr | |
5626 | ofpacts_pull_openflow_actions__(struct ofpbuf *openflow, | |
5627 | unsigned int actions_len, | |
5628 | enum ofp_version version, | |
5629 | uint32_t allowed_ovsinsts, | |
d824b5b7 JS |
5630 | struct ofpbuf *ofpacts, |
5631 | enum ofpact_type outer_action) | |
c2d936a4 BP |
5632 | { |
5633 | const struct ofp_action_header *actions; | |
5634 | enum ofperr error; | |
5635 | ||
d824b5b7 JS |
5636 | if (!outer_action) { |
5637 | ofpbuf_clear(ofpacts); | |
5638 | } | |
c2d936a4 BP |
5639 | |
5640 | if (actions_len % OFP_ACTION_ALIGN != 0) { | |
5641 | VLOG_WARN_RL(&rl, "OpenFlow message actions length %u is not a " | |
5642 | "multiple of %d", actions_len, OFP_ACTION_ALIGN); | |
5643 | return OFPERR_OFPBRC_BAD_LEN; | |
5644 | } | |
5645 | ||
5646 | actions = ofpbuf_try_pull(openflow, actions_len); | |
5647 | if (actions == NULL) { | |
5648 | VLOG_WARN_RL(&rl, "OpenFlow message actions length %u exceeds " | |
5649 | "remaining message length (%"PRIu32")", | |
6fd6ed71 | 5650 | actions_len, openflow->size); |
c2d936a4 BP |
5651 | return OFPERR_OFPBRC_BAD_LEN; |
5652 | } | |
5653 | ||
5654 | error = ofpacts_decode(actions, actions_len, version, ofpacts); | |
5655 | if (error) { | |
5656 | ofpbuf_clear(ofpacts); | |
5657 | return error; | |
5658 | } | |
5659 | ||
d824b5b7 JS |
5660 | error = ofpacts_verify(ofpacts->data, ofpacts->size, allowed_ovsinsts, |
5661 | outer_action); | |
c2d936a4 BP |
5662 | if (error) { |
5663 | ofpbuf_clear(ofpacts); | |
5664 | } | |
5665 | return error; | |
5666 | } | |
5667 | ||
5668 | /* Attempts to convert 'actions_len' bytes of OpenFlow actions from the | |
5669 | * front of 'openflow' into ofpacts. On success, replaces any existing content | |
5670 | * in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'. | |
5671 | * Returns 0 if successful, otherwise an OpenFlow error. | |
5672 | * | |
5673 | * Actions are processed according to their OpenFlow version which | |
5674 | * is provided in the 'version' parameter. | |
5675 | * | |
5676 | * In most places in OpenFlow, actions appear encapsulated in instructions, so | |
5677 | * you should call ofpacts_pull_openflow_instructions() instead of this | |
5678 | * function. | |
5679 | * | |
5680 | * The parsed actions are valid generically, but they may not be valid in a | |
5681 | * specific context. For example, port numbers up to OFPP_MAX are valid | |
5682 | * generically, but specific datapaths may only support port numbers in a | |
5683 | * smaller range. Use ofpacts_check() to additional check whether actions are | |
5684 | * valid in a specific context. */ | |
5685 | enum ofperr | |
5686 | ofpacts_pull_openflow_actions(struct ofpbuf *openflow, | |
5687 | unsigned int actions_len, | |
5688 | enum ofp_version version, | |
5689 | struct ofpbuf *ofpacts) | |
5690 | { | |
5691 | return ofpacts_pull_openflow_actions__(openflow, actions_len, version, | |
5692 | 1u << OVSINST_OFPIT11_APPLY_ACTIONS, | |
d824b5b7 | 5693 | ofpacts, 0); |
c2d936a4 BP |
5694 | } |
5695 | \f | |
5696 | /* OpenFlow 1.1 actions. */ | |
5697 | ||
5698 | ||
5699 | /* True if an action sets the value of a field | |
5700 | * in a way that is compatibile with the action set. | |
1b0ee636 | 5701 | * The field can be set via either a set or a move action. |
c2d936a4 BP |
5702 | * False otherwise. */ |
5703 | static bool | |
1b0ee636 | 5704 | ofpact_is_set_or_move_action(const struct ofpact *a) |
c2d936a4 BP |
5705 | { |
5706 | switch (a->type) { | |
5707 | case OFPACT_SET_FIELD: | |
1b0ee636 | 5708 | case OFPACT_REG_MOVE: |
c2d936a4 BP |
5709 | case OFPACT_SET_ETH_DST: |
5710 | case OFPACT_SET_ETH_SRC: | |
5711 | case OFPACT_SET_IP_DSCP: | |
5712 | case OFPACT_SET_IP_ECN: | |
5713 | case OFPACT_SET_IP_TTL: | |
5714 | case OFPACT_SET_IPV4_DST: | |
5715 | case OFPACT_SET_IPV4_SRC: | |
5716 | case OFPACT_SET_L4_DST_PORT: | |
5717 | case OFPACT_SET_L4_SRC_PORT: | |
5718 | case OFPACT_SET_MPLS_LABEL: | |
5719 | case OFPACT_SET_MPLS_TC: | |
5720 | case OFPACT_SET_MPLS_TTL: | |
5721 | case OFPACT_SET_QUEUE: | |
5722 | case OFPACT_SET_TUNNEL: | |
5723 | case OFPACT_SET_VLAN_PCP: | |
5724 | case OFPACT_SET_VLAN_VID: | |
5725 | return true; | |
5726 | case OFPACT_BUNDLE: | |
5727 | case OFPACT_CLEAR_ACTIONS: | |
07659514 | 5728 | case OFPACT_CT: |
9ac0aada | 5729 | case OFPACT_NAT: |
c2d936a4 BP |
5730 | case OFPACT_CONTROLLER: |
5731 | case OFPACT_DEC_MPLS_TTL: | |
5732 | case OFPACT_DEC_TTL: | |
5733 | case OFPACT_ENQUEUE: | |
5734 | case OFPACT_EXIT: | |
e672ff9b | 5735 | case OFPACT_UNROLL_XLATE: |
c2d936a4 BP |
5736 | case OFPACT_FIN_TIMEOUT: |
5737 | case OFPACT_GOTO_TABLE: | |
5738 | case OFPACT_GROUP: | |
5739 | case OFPACT_LEARN: | |
18080541 | 5740 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
5741 | case OFPACT_METER: |
5742 | case OFPACT_MULTIPATH: | |
5743 | case OFPACT_NOTE: | |
5744 | case OFPACT_OUTPUT: | |
5745 | case OFPACT_OUTPUT_REG: | |
5746 | case OFPACT_POP_MPLS: | |
5747 | case OFPACT_POP_QUEUE: | |
5748 | case OFPACT_PUSH_MPLS: | |
5749 | case OFPACT_PUSH_VLAN: | |
c2d936a4 BP |
5750 | case OFPACT_RESUBMIT: |
5751 | case OFPACT_SAMPLE: | |
5752 | case OFPACT_STACK_POP: | |
5753 | case OFPACT_STACK_PUSH: | |
5754 | case OFPACT_STRIP_VLAN: | |
5755 | case OFPACT_WRITE_ACTIONS: | |
5756 | case OFPACT_WRITE_METADATA: | |
d4abaff5 | 5757 | case OFPACT_DEBUG_RECIRC: |
c2d936a4 BP |
5758 | return false; |
5759 | default: | |
5760 | OVS_NOT_REACHED(); | |
5761 | } | |
5762 | } | |
5763 | ||
5764 | /* True if an action is allowed in the action set. | |
5765 | * False otherwise. */ | |
5766 | static bool | |
5767 | ofpact_is_allowed_in_actions_set(const struct ofpact *a) | |
5768 | { | |
5769 | switch (a->type) { | |
5770 | case OFPACT_DEC_MPLS_TTL: | |
5771 | case OFPACT_DEC_TTL: | |
5772 | case OFPACT_GROUP: | |
5773 | case OFPACT_OUTPUT: | |
5774 | case OFPACT_POP_MPLS: | |
5775 | case OFPACT_PUSH_MPLS: | |
5776 | case OFPACT_PUSH_VLAN: | |
1b0ee636 | 5777 | case OFPACT_REG_MOVE: |
c2d936a4 BP |
5778 | case OFPACT_SET_FIELD: |
5779 | case OFPACT_SET_ETH_DST: | |
5780 | case OFPACT_SET_ETH_SRC: | |
5781 | case OFPACT_SET_IP_DSCP: | |
5782 | case OFPACT_SET_IP_ECN: | |
5783 | case OFPACT_SET_IP_TTL: | |
5784 | case OFPACT_SET_IPV4_DST: | |
5785 | case OFPACT_SET_IPV4_SRC: | |
5786 | case OFPACT_SET_L4_DST_PORT: | |
5787 | case OFPACT_SET_L4_SRC_PORT: | |
5788 | case OFPACT_SET_MPLS_LABEL: | |
5789 | case OFPACT_SET_MPLS_TC: | |
5790 | case OFPACT_SET_MPLS_TTL: | |
5791 | case OFPACT_SET_QUEUE: | |
5792 | case OFPACT_SET_TUNNEL: | |
5793 | case OFPACT_SET_VLAN_PCP: | |
5794 | case OFPACT_SET_VLAN_VID: | |
5795 | case OFPACT_STRIP_VLAN: | |
5796 | return true; | |
5797 | ||
5798 | /* In general these actions are excluded because they are not part of | |
5799 | * the OpenFlow specification nor map to actions that are defined in | |
5800 | * the specification. Thus the order in which they should be applied | |
5801 | * in the action set is undefined. */ | |
5802 | case OFPACT_BUNDLE: | |
5803 | case OFPACT_CONTROLLER: | |
07659514 | 5804 | case OFPACT_CT: |
9ac0aada | 5805 | case OFPACT_NAT: |
c2d936a4 BP |
5806 | case OFPACT_ENQUEUE: |
5807 | case OFPACT_EXIT: | |
e672ff9b | 5808 | case OFPACT_UNROLL_XLATE: |
c2d936a4 BP |
5809 | case OFPACT_FIN_TIMEOUT: |
5810 | case OFPACT_LEARN: | |
18080541 | 5811 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
5812 | case OFPACT_MULTIPATH: |
5813 | case OFPACT_NOTE: | |
5814 | case OFPACT_OUTPUT_REG: | |
5815 | case OFPACT_POP_QUEUE: | |
c2d936a4 BP |
5816 | case OFPACT_RESUBMIT: |
5817 | case OFPACT_SAMPLE: | |
5818 | case OFPACT_STACK_POP: | |
5819 | case OFPACT_STACK_PUSH: | |
d4abaff5 | 5820 | case OFPACT_DEBUG_RECIRC: |
c2d936a4 BP |
5821 | |
5822 | /* The action set may only include actions and thus | |
5823 | * may not include any instructions */ | |
5824 | case OFPACT_CLEAR_ACTIONS: | |
5825 | case OFPACT_GOTO_TABLE: | |
5826 | case OFPACT_METER: | |
5827 | case OFPACT_WRITE_ACTIONS: | |
5828 | case OFPACT_WRITE_METADATA: | |
5829 | return false; | |
5830 | default: | |
5831 | OVS_NOT_REACHED(); | |
5832 | } | |
f25d0cf3 BP |
5833 | } |
5834 | ||
c2d936a4 | 5835 | /* Append ofpact 'a' onto the tail of 'out' */ |
f25d0cf3 | 5836 | static void |
c2d936a4 | 5837 | ofpact_copy(struct ofpbuf *out, const struct ofpact *a) |
f25d0cf3 | 5838 | { |
c2d936a4 | 5839 | ofpbuf_put(out, a, OFPACT_ALIGN(a->len)); |
f25d0cf3 BP |
5840 | } |
5841 | ||
c2d936a4 BP |
5842 | /* Copies the last ofpact whose type is 'filter' from 'in' to 'out'. */ |
5843 | static bool | |
5844 | ofpacts_copy_last(struct ofpbuf *out, const struct ofpbuf *in, | |
5845 | enum ofpact_type filter) | |
f25d0cf3 | 5846 | { |
c2d936a4 BP |
5847 | const struct ofpact *target; |
5848 | const struct ofpact *a; | |
f25d0cf3 | 5849 | |
c2d936a4 | 5850 | target = NULL; |
6fd6ed71 | 5851 | OFPACT_FOR_EACH (a, in->data, in->size) { |
c2d936a4 BP |
5852 | if (a->type == filter) { |
5853 | target = a; | |
5854 | } | |
5855 | } | |
5856 | if (target) { | |
5857 | ofpact_copy(out, target); | |
f25d0cf3 | 5858 | } |
c2d936a4 | 5859 | return target != NULL; |
f25d0cf3 BP |
5860 | } |
5861 | ||
c2d936a4 BP |
5862 | /* Append all ofpacts, for which 'filter' returns true, from 'in' to 'out'. |
5863 | * The order of appended ofpacts is preserved between 'in' and 'out' */ | |
4cceacb9 | 5864 | static void |
c2d936a4 BP |
5865 | ofpacts_copy_all(struct ofpbuf *out, const struct ofpbuf *in, |
5866 | bool (*filter)(const struct ofpact *)) | |
4cceacb9 | 5867 | { |
c2d936a4 | 5868 | const struct ofpact *a; |
4cceacb9 | 5869 | |
6fd6ed71 | 5870 | OFPACT_FOR_EACH (a, in->data, in->size) { |
c2d936a4 BP |
5871 | if (filter(a)) { |
5872 | ofpact_copy(out, a); | |
5873 | } | |
5874 | } | |
4cceacb9 JS |
5875 | } |
5876 | ||
c2d936a4 BP |
5877 | /* Reads 'action_set', which contains ofpacts accumulated by |
5878 | * OFPACT_WRITE_ACTIONS instructions, and writes equivalent actions to be | |
5879 | * executed directly into 'action_list'. (These names correspond to the | |
5880 | * "Action Set" and "Action List" terms used in OpenFlow 1.1+.) | |
5881 | * | |
5882 | * In general this involves appending the last instance of each action that is | |
e672ff9b | 5883 | * admissible in the action set in the order described in the OpenFlow |
c2d936a4 BP |
5884 | * specification. |
5885 | * | |
5886 | * Exceptions: | |
5887 | * + output action is only appended if no group action was present in 'in'. | |
5888 | * + As a simplification all set actions are copied in the order the are | |
5889 | * provided in 'in' as many set actions applied to a field has the same | |
5890 | * affect as only applying the last action that sets a field and | |
5891 | * duplicates are removed by do_xlate_actions(). | |
5892 | * This has an unwanted side-effect of compsoting multiple | |
5893 | * LOAD_REG actions that touch different regions of the same field. */ | |
5894 | void | |
5895 | ofpacts_execute_action_set(struct ofpbuf *action_list, | |
5896 | const struct ofpbuf *action_set) | |
f25d0cf3 | 5897 | { |
c2d936a4 BP |
5898 | /* The OpenFlow spec "Action Set" section specifies this order. */ |
5899 | ofpacts_copy_last(action_list, action_set, OFPACT_STRIP_VLAN); | |
5900 | ofpacts_copy_last(action_list, action_set, OFPACT_POP_MPLS); | |
5901 | ofpacts_copy_last(action_list, action_set, OFPACT_PUSH_MPLS); | |
5902 | ofpacts_copy_last(action_list, action_set, OFPACT_PUSH_VLAN); | |
5903 | ofpacts_copy_last(action_list, action_set, OFPACT_DEC_TTL); | |
5904 | ofpacts_copy_last(action_list, action_set, OFPACT_DEC_MPLS_TTL); | |
1b0ee636 | 5905 | ofpacts_copy_all(action_list, action_set, ofpact_is_set_or_move_action); |
c2d936a4 | 5906 | ofpacts_copy_last(action_list, action_set, OFPACT_SET_QUEUE); |
f25d0cf3 | 5907 | |
c2d936a4 BP |
5908 | /* If both OFPACT_GROUP and OFPACT_OUTPUT are present, OpenFlow says that |
5909 | * we should execute only OFPACT_GROUP. | |
5910 | * | |
5911 | * If neither OFPACT_GROUP nor OFPACT_OUTPUT is present, then we can drop | |
5912 | * all the actions because there's no point in modifying a packet that will | |
5913 | * not be sent anywhere. */ | |
5914 | if (!ofpacts_copy_last(action_list, action_set, OFPACT_GROUP) && | |
2e34a6a3 SS |
5915 | !ofpacts_copy_last(action_list, action_set, OFPACT_OUTPUT) && |
5916 | !ofpacts_copy_last(action_list, action_set, OFPACT_RESUBMIT)) { | |
c2d936a4 | 5917 | ofpbuf_clear(action_list); |
f25d0cf3 | 5918 | } |
f25d0cf3 BP |
5919 | } |
5920 | ||
f25d0cf3 | 5921 | |
c2d936a4 BP |
5922 | static enum ofperr |
5923 | ofpacts_decode_for_action_set(const struct ofp_action_header *in, | |
5924 | size_t n_in, enum ofp_version version, | |
5925 | struct ofpbuf *out) | |
c2d967a5 | 5926 | { |
c2d936a4 BP |
5927 | enum ofperr error; |
5928 | struct ofpact *a; | |
6fd6ed71 | 5929 | size_t start = out->size; |
c2d967a5 | 5930 | |
c2d936a4 | 5931 | error = ofpacts_decode(in, n_in, version, out); |
c2d967a5 | 5932 | |
c2d936a4 BP |
5933 | if (error) { |
5934 | return error; | |
5935 | } | |
5936 | ||
6fd6ed71 | 5937 | OFPACT_FOR_EACH (a, ofpact_end(out->data, start), out->size - start) { |
c2d936a4 BP |
5938 | if (!ofpact_is_allowed_in_actions_set(a)) { |
5939 | VLOG_WARN_RL(&rl, "disallowed action in action set"); | |
5940 | return OFPERR_OFPBAC_BAD_TYPE; | |
c2d967a5 MM |
5941 | } |
5942 | } | |
c2d936a4 BP |
5943 | |
5944 | return 0; | |
c2d967a5 | 5945 | } |
c2d936a4 BP |
5946 | \f |
5947 | /* OpenFlow 1.1 instructions. */ | |
c2d967a5 | 5948 | |
c2d936a4 BP |
5949 | struct instruction_type_info { |
5950 | enum ovs_instruction_type type; | |
5951 | const char *name; | |
5952 | }; | |
5953 | ||
5954 | static const struct instruction_type_info inst_info[] = { | |
5955 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) {OVSINST_##ENUM, NAME}, | |
5956 | OVS_INSTRUCTIONS | |
5957 | #undef DEFINE_INST | |
5958 | }; | |
5959 | ||
5960 | const char * | |
5961 | ovs_instruction_name_from_type(enum ovs_instruction_type type) | |
f25d0cf3 | 5962 | { |
c2d936a4 | 5963 | return inst_info[type].name; |
f25d0cf3 BP |
5964 | } |
5965 | ||
c2d936a4 BP |
5966 | int |
5967 | ovs_instruction_type_from_name(const char *name) | |
29089a54 | 5968 | { |
c2d936a4 BP |
5969 | const struct instruction_type_info *p; |
5970 | for (p = inst_info; p < &inst_info[ARRAY_SIZE(inst_info)]; p++) { | |
5971 | if (!strcasecmp(name, p->name)) { | |
5972 | return p->type; | |
5973 | } | |
5974 | } | |
5975 | return -1; | |
29089a54 RL |
5976 | } |
5977 | ||
c2d936a4 BP |
5978 | enum ovs_instruction_type |
5979 | ovs_instruction_type_from_ofpact_type(enum ofpact_type type) | |
f25d0cf3 | 5980 | { |
c2d936a4 BP |
5981 | switch (type) { |
5982 | case OFPACT_METER: | |
5983 | return OVSINST_OFPIT13_METER; | |
5984 | case OFPACT_CLEAR_ACTIONS: | |
5985 | return OVSINST_OFPIT11_CLEAR_ACTIONS; | |
5986 | case OFPACT_WRITE_ACTIONS: | |
5987 | return OVSINST_OFPIT11_WRITE_ACTIONS; | |
5988 | case OFPACT_WRITE_METADATA: | |
5989 | return OVSINST_OFPIT11_WRITE_METADATA; | |
5990 | case OFPACT_GOTO_TABLE: | |
5991 | return OVSINST_OFPIT11_GOTO_TABLE; | |
5992 | case OFPACT_OUTPUT: | |
5993 | case OFPACT_GROUP: | |
f25d0cf3 | 5994 | case OFPACT_CONTROLLER: |
c2d936a4 | 5995 | case OFPACT_ENQUEUE: |
f25d0cf3 | 5996 | case OFPACT_OUTPUT_REG: |
f25d0cf3 | 5997 | case OFPACT_BUNDLE: |
c2d936a4 BP |
5998 | case OFPACT_SET_VLAN_VID: |
5999 | case OFPACT_SET_VLAN_PCP: | |
6000 | case OFPACT_STRIP_VLAN: | |
6001 | case OFPACT_PUSH_VLAN: | |
6002 | case OFPACT_SET_ETH_SRC: | |
6003 | case OFPACT_SET_ETH_DST: | |
6004 | case OFPACT_SET_IPV4_SRC: | |
6005 | case OFPACT_SET_IPV4_DST: | |
6006 | case OFPACT_SET_IP_DSCP: | |
6007 | case OFPACT_SET_IP_ECN: | |
6008 | case OFPACT_SET_IP_TTL: | |
6009 | case OFPACT_SET_L4_SRC_PORT: | |
6010 | case OFPACT_SET_L4_DST_PORT: | |
f25d0cf3 | 6011 | case OFPACT_REG_MOVE: |
c2d936a4 | 6012 | case OFPACT_SET_FIELD: |
bd85dac1 | 6013 | case OFPACT_STACK_PUSH: |
bd85dac1 | 6014 | case OFPACT_STACK_POP: |
f25d0cf3 | 6015 | case OFPACT_DEC_TTL: |
097d4939 | 6016 | case OFPACT_SET_MPLS_LABEL: |
097d4939 | 6017 | case OFPACT_SET_MPLS_TC: |
0f3f3c3d | 6018 | case OFPACT_SET_MPLS_TTL: |
b676167a | 6019 | case OFPACT_DEC_MPLS_TTL: |
c2d936a4 BP |
6020 | case OFPACT_PUSH_MPLS: |
6021 | case OFPACT_POP_MPLS: | |
f25d0cf3 | 6022 | case OFPACT_SET_TUNNEL: |
c2d936a4 BP |
6023 | case OFPACT_SET_QUEUE: |
6024 | case OFPACT_POP_QUEUE: | |
6025 | case OFPACT_FIN_TIMEOUT: | |
6026 | case OFPACT_RESUBMIT: | |
6027 | case OFPACT_LEARN: | |
18080541 | 6028 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
6029 | case OFPACT_MULTIPATH: |
6030 | case OFPACT_NOTE: | |
6031 | case OFPACT_EXIT: | |
e672ff9b | 6032 | case OFPACT_UNROLL_XLATE: |
c2d936a4 | 6033 | case OFPACT_SAMPLE: |
d4abaff5 | 6034 | case OFPACT_DEBUG_RECIRC: |
07659514 | 6035 | case OFPACT_CT: |
9ac0aada | 6036 | case OFPACT_NAT: |
c2d936a4 BP |
6037 | default: |
6038 | return OVSINST_OFPIT11_APPLY_ACTIONS; | |
6039 | } | |
6040 | } | |
6041 | ||
6042 | enum ofperr | |
6043 | ovs_instruction_type_from_inst_type(enum ovs_instruction_type *instruction_type, | |
6044 | const uint16_t inst_type) | |
6045 | { | |
6046 | switch (inst_type) { | |
6047 | ||
6048 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
6049 | case ENUM: \ | |
6050 | *instruction_type = OVSINST_##ENUM; \ | |
6051 | return 0; | |
6052 | OVS_INSTRUCTIONS | |
6053 | #undef DEFINE_INST | |
6054 | ||
6055 | default: | |
6056 | return OFPERR_OFPBIC_UNKNOWN_INST; | |
6057 | } | |
6058 | } | |
6059 | ||
6060 | /* Two-way translation between OVS's internal "OVSINST_*" representation of | |
6061 | * instructions and the "OFPIT_*" representation used in OpenFlow. */ | |
6062 | struct ovsinst_map { | |
6063 | enum ovs_instruction_type ovsinst; /* Internal name for instruction. */ | |
6064 | int ofpit; /* OFPIT_* number from OpenFlow spec. */ | |
6065 | }; | |
6066 | ||
6067 | static const struct ovsinst_map * | |
6068 | get_ovsinst_map(enum ofp_version version) | |
6069 | { | |
6070 | /* OpenFlow 1.1 and 1.2 instructions. */ | |
6071 | static const struct ovsinst_map of11[] = { | |
6072 | { OVSINST_OFPIT11_GOTO_TABLE, 1 }, | |
6073 | { OVSINST_OFPIT11_WRITE_METADATA, 2 }, | |
6074 | { OVSINST_OFPIT11_WRITE_ACTIONS, 3 }, | |
6075 | { OVSINST_OFPIT11_APPLY_ACTIONS, 4 }, | |
6076 | { OVSINST_OFPIT11_CLEAR_ACTIONS, 5 }, | |
6077 | { 0, -1 }, | |
6078 | }; | |
f25d0cf3 | 6079 | |
c2d936a4 BP |
6080 | /* OpenFlow 1.3+ instructions. */ |
6081 | static const struct ovsinst_map of13[] = { | |
6082 | { OVSINST_OFPIT11_GOTO_TABLE, 1 }, | |
6083 | { OVSINST_OFPIT11_WRITE_METADATA, 2 }, | |
6084 | { OVSINST_OFPIT11_WRITE_ACTIONS, 3 }, | |
6085 | { OVSINST_OFPIT11_APPLY_ACTIONS, 4 }, | |
6086 | { OVSINST_OFPIT11_CLEAR_ACTIONS, 5 }, | |
6087 | { OVSINST_OFPIT13_METER, 6 }, | |
6088 | { 0, -1 }, | |
6089 | }; | |
4cceacb9 | 6090 | |
c2d936a4 BP |
6091 | return version < OFP13_VERSION ? of11 : of13; |
6092 | } | |
f25d0cf3 | 6093 | |
c2d936a4 BP |
6094 | /* Converts 'ovsinst_bitmap', a bitmap whose bits correspond to OVSINST_* |
6095 | * values, into a bitmap of instructions suitable for OpenFlow 'version' | |
6096 | * (OFP11_VERSION or later), and returns the result. */ | |
6097 | ovs_be32 | |
6098 | ovsinst_bitmap_to_openflow(uint32_t ovsinst_bitmap, enum ofp_version version) | |
6099 | { | |
6100 | uint32_t ofpit_bitmap = 0; | |
6101 | const struct ovsinst_map *x; | |
f25d0cf3 | 6102 | |
c2d936a4 BP |
6103 | for (x = get_ovsinst_map(version); x->ofpit >= 0; x++) { |
6104 | if (ovsinst_bitmap & (1u << x->ovsinst)) { | |
6105 | ofpit_bitmap |= 1u << x->ofpit; | |
6106 | } | |
6107 | } | |
6108 | return htonl(ofpit_bitmap); | |
6109 | } | |
f25d0cf3 | 6110 | |
c2d936a4 BP |
6111 | /* Converts 'ofpit_bitmap', a bitmap of instructions from an OpenFlow message |
6112 | * with the given 'version' (OFP11_VERSION or later) into a bitmap whose bits | |
6113 | * correspond to OVSINST_* values, and returns the result. */ | |
6114 | uint32_t | |
6115 | ovsinst_bitmap_from_openflow(ovs_be32 ofpit_bitmap, enum ofp_version version) | |
6116 | { | |
6117 | uint32_t ovsinst_bitmap = 0; | |
6118 | const struct ovsinst_map *x; | |
f25d0cf3 | 6119 | |
c2d936a4 BP |
6120 | for (x = get_ovsinst_map(version); x->ofpit >= 0; x++) { |
6121 | if (ofpit_bitmap & htonl(1u << x->ofpit)) { | |
6122 | ovsinst_bitmap |= 1u << x->ovsinst; | |
6123 | } | |
6124 | } | |
6125 | return ovsinst_bitmap; | |
6126 | } | |
f25d0cf3 | 6127 | |
c2d936a4 BP |
6128 | static inline struct ofp11_instruction * |
6129 | instruction_next(const struct ofp11_instruction *inst) | |
6130 | { | |
6131 | return ((struct ofp11_instruction *) (void *) | |
6132 | ((uint8_t *) inst + ntohs(inst->len))); | |
6133 | } | |
f25d0cf3 | 6134 | |
c2d936a4 BP |
6135 | static inline bool |
6136 | instruction_is_valid(const struct ofp11_instruction *inst, | |
6137 | size_t n_instructions) | |
6138 | { | |
6139 | uint16_t len = ntohs(inst->len); | |
6140 | return (!(len % OFP11_INSTRUCTION_ALIGN) | |
6141 | && len >= sizeof *inst | |
6142 | && len / sizeof *inst <= n_instructions); | |
6143 | } | |
f25d0cf3 | 6144 | |
c2d936a4 BP |
6145 | /* This macro is careful to check for instructions with bad lengths. */ |
6146 | #define INSTRUCTION_FOR_EACH(ITER, LEFT, INSTRUCTIONS, N_INSTRUCTIONS) \ | |
6147 | for ((ITER) = (INSTRUCTIONS), (LEFT) = (N_INSTRUCTIONS); \ | |
6148 | (LEFT) > 0 && instruction_is_valid(ITER, LEFT); \ | |
6149 | ((LEFT) -= (ntohs((ITER)->len) \ | |
6150 | / sizeof(struct ofp11_instruction)), \ | |
6151 | (ITER) = instruction_next(ITER))) | |
f25d0cf3 | 6152 | |
c2d936a4 BP |
6153 | static enum ofperr |
6154 | decode_openflow11_instruction(const struct ofp11_instruction *inst, | |
6155 | enum ovs_instruction_type *type) | |
6156 | { | |
6157 | uint16_t len = ntohs(inst->len); | |
b02475c5 | 6158 | |
c2d936a4 BP |
6159 | switch (inst->type) { |
6160 | case CONSTANT_HTONS(OFPIT11_EXPERIMENTER): | |
6161 | return OFPERR_OFPBIC_BAD_EXPERIMENTER; | |
b02475c5 | 6162 | |
c2d936a4 BP |
6163 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \ |
6164 | case CONSTANT_HTONS(ENUM): \ | |
6165 | if (EXTENSIBLE \ | |
6166 | ? len >= sizeof(struct STRUCT) \ | |
6167 | : len == sizeof(struct STRUCT)) { \ | |
6168 | *type = OVSINST_##ENUM; \ | |
6169 | return 0; \ | |
6170 | } else { \ | |
6171 | return OFPERR_OFPBIC_BAD_LEN; \ | |
6172 | } | |
6173 | OVS_INSTRUCTIONS | |
6174 | #undef DEFINE_INST | |
29089a54 | 6175 | |
c2d936a4 BP |
6176 | default: |
6177 | return OFPERR_OFPBIC_UNKNOWN_INST; | |
f25d0cf3 BP |
6178 | } |
6179 | } | |
f25d0cf3 | 6180 | |
c2d936a4 BP |
6181 | static enum ofperr |
6182 | decode_openflow11_instructions(const struct ofp11_instruction insts[], | |
6183 | size_t n_insts, | |
6184 | const struct ofp11_instruction *out[]) | |
f25d0cf3 | 6185 | { |
c2d936a4 BP |
6186 | const struct ofp11_instruction *inst; |
6187 | size_t left; | |
f25d0cf3 | 6188 | |
c2d936a4 BP |
6189 | memset(out, 0, N_OVS_INSTRUCTIONS * sizeof *out); |
6190 | INSTRUCTION_FOR_EACH (inst, left, insts, n_insts) { | |
6191 | enum ovs_instruction_type type; | |
6192 | enum ofperr error; | |
f25d0cf3 | 6193 | |
c2d936a4 BP |
6194 | error = decode_openflow11_instruction(inst, &type); |
6195 | if (error) { | |
6196 | return error; | |
6197 | } | |
f25d0cf3 | 6198 | |
c2d936a4 BP |
6199 | if (out[type]) { |
6200 | return OFPERR_OFPBIC_DUP_INST; | |
6201 | } | |
6202 | out[type] = inst; | |
6203 | } | |
6204 | ||
6205 | if (left) { | |
6206 | VLOG_WARN_RL(&rl, "bad instruction format at offset %"PRIuSIZE, | |
6207 | (n_insts - left) * sizeof *inst); | |
6208 | return OFPERR_OFPBIC_BAD_LEN; | |
6209 | } | |
6210 | return 0; | |
f25d0cf3 BP |
6211 | } |
6212 | ||
6213 | static void | |
c2d936a4 BP |
6214 | get_actions_from_instruction(const struct ofp11_instruction *inst, |
6215 | const struct ofp_action_header **actions, | |
6216 | size_t *actions_len) | |
f25d0cf3 | 6217 | { |
c2d936a4 BP |
6218 | *actions = ALIGNED_CAST(const struct ofp_action_header *, inst + 1); |
6219 | *actions_len = ntohs(inst->len) - sizeof *inst; | |
6220 | } | |
f25d0cf3 | 6221 | |
c2d936a4 BP |
6222 | enum ofperr |
6223 | ofpacts_pull_openflow_instructions(struct ofpbuf *openflow, | |
6224 | unsigned int instructions_len, | |
6225 | enum ofp_version version, | |
6226 | struct ofpbuf *ofpacts) | |
6227 | { | |
6228 | const struct ofp11_instruction *instructions; | |
6229 | const struct ofp11_instruction *insts[N_OVS_INSTRUCTIONS]; | |
6230 | enum ofperr error; | |
f25d0cf3 | 6231 | |
c2d936a4 BP |
6232 | if (version == OFP10_VERSION) { |
6233 | return ofpacts_pull_openflow_actions__(openflow, instructions_len, | |
6234 | version, | |
6235 | (1u << N_OVS_INSTRUCTIONS) - 1, | |
d824b5b7 | 6236 | ofpacts, 0); |
c2d936a4 | 6237 | } |
f25d0cf3 | 6238 | |
c2d936a4 | 6239 | ofpbuf_clear(ofpacts); |
f25d0cf3 | 6240 | |
c2d936a4 BP |
6241 | if (instructions_len % OFP11_INSTRUCTION_ALIGN != 0) { |
6242 | VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u is not a " | |
6243 | "multiple of %d", | |
6244 | instructions_len, OFP11_INSTRUCTION_ALIGN); | |
6245 | error = OFPERR_OFPBIC_BAD_LEN; | |
6246 | goto exit; | |
6247 | } | |
f25d0cf3 | 6248 | |
c2d936a4 BP |
6249 | instructions = ofpbuf_try_pull(openflow, instructions_len); |
6250 | if (instructions == NULL) { | |
6251 | VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u exceeds " | |
6252 | "remaining message length (%"PRIu32")", | |
6fd6ed71 | 6253 | instructions_len, openflow->size); |
c2d936a4 BP |
6254 | error = OFPERR_OFPBIC_BAD_LEN; |
6255 | goto exit; | |
6256 | } | |
f25d0cf3 | 6257 | |
c2d936a4 BP |
6258 | error = decode_openflow11_instructions( |
6259 | instructions, instructions_len / OFP11_INSTRUCTION_ALIGN, | |
6260 | insts); | |
6261 | if (error) { | |
6262 | goto exit; | |
6263 | } | |
f25d0cf3 | 6264 | |
c2d936a4 BP |
6265 | if (insts[OVSINST_OFPIT13_METER]) { |
6266 | const struct ofp13_instruction_meter *oim; | |
6267 | struct ofpact_meter *om; | |
f25d0cf3 | 6268 | |
c2d936a4 BP |
6269 | oim = ALIGNED_CAST(const struct ofp13_instruction_meter *, |
6270 | insts[OVSINST_OFPIT13_METER]); | |
f25d0cf3 | 6271 | |
c2d936a4 BP |
6272 | om = ofpact_put_METER(ofpacts); |
6273 | om->meter_id = ntohl(oim->meter_id); | |
6274 | } | |
6275 | if (insts[OVSINST_OFPIT11_APPLY_ACTIONS]) { | |
6276 | const struct ofp_action_header *actions; | |
6277 | size_t actions_len; | |
f25d0cf3 | 6278 | |
c2d936a4 BP |
6279 | get_actions_from_instruction(insts[OVSINST_OFPIT11_APPLY_ACTIONS], |
6280 | &actions, &actions_len); | |
6281 | error = ofpacts_decode(actions, actions_len, version, ofpacts); | |
6282 | if (error) { | |
6283 | goto exit; | |
6284 | } | |
6285 | } | |
6286 | if (insts[OVSINST_OFPIT11_CLEAR_ACTIONS]) { | |
6287 | instruction_get_OFPIT11_CLEAR_ACTIONS( | |
6288 | insts[OVSINST_OFPIT11_CLEAR_ACTIONS]); | |
6289 | ofpact_put_CLEAR_ACTIONS(ofpacts); | |
6290 | } | |
6291 | if (insts[OVSINST_OFPIT11_WRITE_ACTIONS]) { | |
6292 | struct ofpact_nest *on; | |
6293 | const struct ofp_action_header *actions; | |
6294 | size_t actions_len; | |
2bd318de | 6295 | size_t start = ofpacts->size; |
255a54ea BP |
6296 | ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS, |
6297 | offsetof(struct ofpact_nest, actions)); | |
c2d936a4 BP |
6298 | get_actions_from_instruction(insts[OVSINST_OFPIT11_WRITE_ACTIONS], |
6299 | &actions, &actions_len); | |
6300 | error = ofpacts_decode_for_action_set(actions, actions_len, | |
6301 | version, ofpacts); | |
6302 | if (error) { | |
6303 | goto exit; | |
6304 | } | |
6305 | on = ofpbuf_at_assert(ofpacts, start, sizeof *on); | |
6fd6ed71 | 6306 | on->ofpact.len = ofpacts->size - start; |
c2d936a4 BP |
6307 | } |
6308 | if (insts[OVSINST_OFPIT11_WRITE_METADATA]) { | |
6309 | const struct ofp11_instruction_write_metadata *oiwm; | |
6310 | struct ofpact_metadata *om; | |
ca287d20 | 6311 | |
c2d936a4 BP |
6312 | oiwm = ALIGNED_CAST(const struct ofp11_instruction_write_metadata *, |
6313 | insts[OVSINST_OFPIT11_WRITE_METADATA]); | |
8dd54666 | 6314 | |
c2d936a4 BP |
6315 | om = ofpact_put_WRITE_METADATA(ofpacts); |
6316 | om->metadata = oiwm->metadata; | |
6317 | om->mask = oiwm->metadata_mask; | |
6318 | } | |
6319 | if (insts[OVSINST_OFPIT11_GOTO_TABLE]) { | |
6320 | const struct ofp11_instruction_goto_table *oigt; | |
6321 | struct ofpact_goto_table *ogt; | |
7395c052 | 6322 | |
c2d936a4 BP |
6323 | oigt = instruction_get_OFPIT11_GOTO_TABLE( |
6324 | insts[OVSINST_OFPIT11_GOTO_TABLE]); | |
6325 | ogt = ofpact_put_GOTO_TABLE(ofpacts); | |
6326 | ogt->table_id = oigt->table_id; | |
6327 | } | |
e3f8f887 | 6328 | |
6fd6ed71 | 6329 | error = ofpacts_verify(ofpacts->data, ofpacts->size, |
d824b5b7 | 6330 | (1u << N_OVS_INSTRUCTIONS) - 1, 0); |
c2d936a4 BP |
6331 | exit: |
6332 | if (error) { | |
6333 | ofpbuf_clear(ofpacts); | |
f25d0cf3 | 6334 | } |
c2d936a4 | 6335 | return error; |
f25d0cf3 | 6336 | } |
d01c980f | 6337 | |
c2d936a4 BP |
6338 | /* Update the length of the instruction that begins at offset 'ofs' within |
6339 | * 'openflow' and contains nested actions that extend to the end of 'openflow'. | |
6340 | * If the instruction contains no nested actions, deletes it entirely. */ | |
d01c980f | 6341 | static void |
c2d936a4 | 6342 | ofpacts_update_instruction_actions(struct ofpbuf *openflow, size_t ofs) |
d01c980f | 6343 | { |
c2d936a4 | 6344 | struct ofp11_instruction_actions *oia; |
d01c980f | 6345 | |
c2d936a4 | 6346 | oia = ofpbuf_at_assert(openflow, ofs, sizeof *oia); |
6fd6ed71 PS |
6347 | if (openflow->size > ofs + sizeof *oia) { |
6348 | oia->len = htons(openflow->size - ofs); | |
c2d936a4 | 6349 | } else { |
6fd6ed71 | 6350 | openflow->size = ofs; |
c2d936a4 | 6351 | } |
d01c980f | 6352 | } |
c2d936a4 BP |
6353 | \f |
6354 | /* Checks that 'port' is a valid output port for OFPACT_OUTPUT, given that the | |
6355 | * switch will never have more than 'max_ports' ports. Returns 0 if 'port' is | |
6356 | * valid, otherwise an OpenFlow error code. */ | |
6357 | enum ofperr | |
6358 | ofpact_check_output_port(ofp_port_t port, ofp_port_t max_ports) | |
99086062 | 6359 | { |
c2d936a4 BP |
6360 | switch (port) { |
6361 | case OFPP_IN_PORT: | |
6362 | case OFPP_TABLE: | |
6363 | case OFPP_NORMAL: | |
6364 | case OFPP_FLOOD: | |
6365 | case OFPP_ALL: | |
6366 | case OFPP_CONTROLLER: | |
c2d936a4 BP |
6367 | case OFPP_LOCAL: |
6368 | return 0; | |
6369 | ||
13d2c689 BP |
6370 | case OFPP_NONE: |
6371 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
6372 | ||
c2d936a4 BP |
6373 | default: |
6374 | if (ofp_to_u16(port) < ofp_to_u16(max_ports)) { | |
6375 | return 0; | |
6376 | } | |
6377 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
99086062 BP |
6378 | } |
6379 | } | |
6380 | ||
c2d936a4 BP |
6381 | /* Removes the protocols that require consistency between match and actions |
6382 | * (that's everything but OpenFlow 1.0) from '*usable_protocols'. | |
6383 | * | |
6384 | * (An example of an inconsistency between match and actions is a flow that | |
6385 | * does not match on an MPLS Ethertype but has an action that pops an MPLS | |
6386 | * label.) */ | |
d01c980f | 6387 | static void |
c2d936a4 BP |
6388 | inconsistent_match(enum ofputil_protocol *usable_protocols) |
6389 | { | |
6390 | *usable_protocols &= OFPUTIL_P_OF10_ANY; | |
6391 | } | |
6392 | ||
6393 | /* May modify flow->dl_type, flow->nw_proto and flow->vlan_tci, | |
6394 | * caller must restore them. | |
6395 | * | |
6396 | * Modifies some actions, filling in fields that could not be properly set | |
6397 | * without context. */ | |
6398 | static enum ofperr | |
6399 | ofpact_check__(enum ofputil_protocol *usable_protocols, struct ofpact *a, | |
6400 | struct flow *flow, ofp_port_t max_ports, | |
6401 | uint8_t table_id, uint8_t n_tables) | |
d01c980f | 6402 | { |
c2d936a4 BP |
6403 | const struct ofpact_enqueue *enqueue; |
6404 | const struct mf_field *mf; | |
6405 | ||
d01c980f BP |
6406 | switch (a->type) { |
6407 | case OFPACT_OUTPUT: | |
c2d936a4 BP |
6408 | return ofpact_check_output_port(ofpact_get_OUTPUT(a)->port, |
6409 | max_ports); | |
6410 | ||
6411 | case OFPACT_CONTROLLER: | |
6412 | return 0; | |
d01c980f BP |
6413 | |
6414 | case OFPACT_ENQUEUE: | |
c2d936a4 BP |
6415 | enqueue = ofpact_get_ENQUEUE(a); |
6416 | if (ofp_to_u16(enqueue->port) >= ofp_to_u16(max_ports) | |
6417 | && enqueue->port != OFPP_IN_PORT | |
6418 | && enqueue->port != OFPP_LOCAL) { | |
6419 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
6420 | } | |
6421 | return 0; | |
6422 | ||
6423 | case OFPACT_OUTPUT_REG: | |
6424 | return mf_check_src(&ofpact_get_OUTPUT_REG(a)->src, flow); | |
6425 | ||
6426 | case OFPACT_BUNDLE: | |
6427 | return bundle_check(ofpact_get_BUNDLE(a), max_ports, flow); | |
d01c980f BP |
6428 | |
6429 | case OFPACT_SET_VLAN_VID: | |
c2d936a4 BP |
6430 | /* Remember if we saw a vlan tag in the flow to aid translating to |
6431 | * OpenFlow 1.1+ if need be. */ | |
6432 | ofpact_get_SET_VLAN_VID(a)->flow_has_vlan = | |
6433 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
6434 | if (!(flow->vlan_tci & htons(VLAN_CFI)) && | |
6435 | !ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) { | |
6436 | inconsistent_match(usable_protocols); | |
6437 | } | |
6438 | /* Temporary mark that we have a vlan tag. */ | |
6439 | flow->vlan_tci |= htons(VLAN_CFI); | |
6440 | return 0; | |
d01c980f BP |
6441 | |
6442 | case OFPACT_SET_VLAN_PCP: | |
c2d936a4 BP |
6443 | /* Remember if we saw a vlan tag in the flow to aid translating to |
6444 | * OpenFlow 1.1+ if need be. */ | |
6445 | ofpact_get_SET_VLAN_PCP(a)->flow_has_vlan = | |
6446 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
6447 | if (!(flow->vlan_tci & htons(VLAN_CFI)) && | |
6448 | !ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) { | |
6449 | inconsistent_match(usable_protocols); | |
6450 | } | |
6451 | /* Temporary mark that we have a vlan tag. */ | |
6452 | flow->vlan_tci |= htons(VLAN_CFI); | |
6453 | return 0; | |
d01c980f BP |
6454 | |
6455 | case OFPACT_STRIP_VLAN: | |
c2d936a4 BP |
6456 | if (!(flow->vlan_tci & htons(VLAN_CFI))) { |
6457 | inconsistent_match(usable_protocols); | |
6458 | } | |
6459 | /* Temporary mark that we have no vlan tag. */ | |
6460 | flow->vlan_tci = htons(0); | |
6461 | return 0; | |
d01c980f | 6462 | |
3e34fbdd | 6463 | case OFPACT_PUSH_VLAN: |
c2d936a4 BP |
6464 | if (flow->vlan_tci & htons(VLAN_CFI)) { |
6465 | /* Multiple VLAN headers not supported. */ | |
6466 | return OFPERR_OFPBAC_BAD_TAG; | |
6467 | } | |
6468 | /* Temporary mark that we have a vlan tag. */ | |
6469 | flow->vlan_tci |= htons(VLAN_CFI); | |
6470 | return 0; | |
276c4e7a | 6471 | |
d01c980f | 6472 | case OFPACT_SET_ETH_SRC: |
d01c980f | 6473 | case OFPACT_SET_ETH_DST: |
c2d936a4 | 6474 | return 0; |
d01c980f BP |
6475 | |
6476 | case OFPACT_SET_IPV4_SRC: | |
d01c980f | 6477 | case OFPACT_SET_IPV4_DST: |
c2d936a4 BP |
6478 | if (flow->dl_type != htons(ETH_TYPE_IP)) { |
6479 | inconsistent_match(usable_protocols); | |
6480 | } | |
6481 | return 0; | |
d01c980f | 6482 | |
04f01c24 | 6483 | case OFPACT_SET_IP_DSCP: |
ff14eb7a | 6484 | case OFPACT_SET_IP_ECN: |
0c20dbe4 | 6485 | case OFPACT_SET_IP_TTL: |
7bcb1506 | 6486 | case OFPACT_DEC_TTL: |
c2d936a4 BP |
6487 | if (!is_ip_any(flow)) { |
6488 | inconsistent_match(usable_protocols); | |
6489 | } | |
6490 | return 0; | |
b02475c5 | 6491 | |
c2d936a4 | 6492 | case OFPACT_SET_L4_SRC_PORT: |
c2d936a4 | 6493 | case OFPACT_SET_L4_DST_PORT: |
b8778a0d | 6494 | if (!is_ip_any(flow) || (flow->nw_frag & FLOW_NW_FRAG_LATER) || |
c2d936a4 BP |
6495 | (flow->nw_proto != IPPROTO_TCP && flow->nw_proto != IPPROTO_UDP |
6496 | && flow->nw_proto != IPPROTO_SCTP)) { | |
6497 | inconsistent_match(usable_protocols); | |
6498 | } | |
6499 | /* Note on which transport protocol the port numbers are set. | |
6500 | * This allows this set action to be converted to an OF1.2 set field | |
6501 | * action. */ | |
b8778a0d JR |
6502 | if (a->type == OFPACT_SET_L4_SRC_PORT) { |
6503 | ofpact_get_SET_L4_SRC_PORT(a)->flow_ip_proto = flow->nw_proto; | |
6504 | } else { | |
6505 | ofpact_get_SET_L4_DST_PORT(a)->flow_ip_proto = flow->nw_proto; | |
6506 | } | |
c2d936a4 | 6507 | return 0; |
b02475c5 | 6508 | |
c2d936a4 BP |
6509 | case OFPACT_REG_MOVE: |
6510 | return nxm_reg_move_check(ofpact_get_REG_MOVE(a), flow); | |
8dd54666 | 6511 | |
e3f8f887 | 6512 | case OFPACT_SET_FIELD: |
c2d936a4 BP |
6513 | mf = ofpact_get_SET_FIELD(a)->field; |
6514 | /* Require OXM_OF_VLAN_VID to have an existing VLAN header. */ | |
6515 | if (!mf_are_prereqs_ok(mf, flow) || | |
6516 | (mf->id == MFF_VLAN_VID && !(flow->vlan_tci & htons(VLAN_CFI)))) { | |
6517 | VLOG_WARN_RL(&rl, "set_field %s lacks correct prerequisities", | |
6518 | mf->name); | |
6519 | return OFPERR_OFPBAC_MATCH_INCONSISTENT; | |
6520 | } | |
6521 | /* Remember if we saw a vlan tag in the flow to aid translating to | |
6522 | * OpenFlow 1.1 if need be. */ | |
6523 | ofpact_get_SET_FIELD(a)->flow_has_vlan = | |
6524 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
6525 | if (mf->id == MFF_VLAN_TCI) { | |
6526 | /* The set field may add or remove the vlan tag, | |
6527 | * Mark the status temporarily. */ | |
6528 | flow->vlan_tci = ofpact_get_SET_FIELD(a)->value.be16; | |
6529 | } | |
6530 | return 0; | |
e3f8f887 | 6531 | |
bd85dac1 | 6532 | case OFPACT_STACK_PUSH: |
c2d936a4 BP |
6533 | return nxm_stack_push_check(ofpact_get_STACK_PUSH(a), flow); |
6534 | ||
bd85dac1 | 6535 | case OFPACT_STACK_POP: |
c2d936a4 BP |
6536 | return nxm_stack_pop_check(ofpact_get_STACK_POP(a), flow); |
6537 | ||
6538 | case OFPACT_SET_MPLS_LABEL: | |
6539 | case OFPACT_SET_MPLS_TC: | |
6540 | case OFPACT_SET_MPLS_TTL: | |
6541 | case OFPACT_DEC_MPLS_TTL: | |
6542 | if (!eth_type_mpls(flow->dl_type)) { | |
6543 | inconsistent_match(usable_protocols); | |
6544 | } | |
6545 | return 0; | |
6546 | ||
d01c980f | 6547 | case OFPACT_SET_TUNNEL: |
c2d936a4 | 6548 | case OFPACT_SET_QUEUE: |
d01c980f | 6549 | case OFPACT_POP_QUEUE: |
d01c980f | 6550 | case OFPACT_RESUBMIT: |
c2d936a4 BP |
6551 | return 0; |
6552 | ||
6553 | case OFPACT_FIN_TIMEOUT: | |
6554 | if (flow->nw_proto != IPPROTO_TCP) { | |
6555 | inconsistent_match(usable_protocols); | |
6556 | } | |
6557 | return 0; | |
6558 | ||
d01c980f | 6559 | case OFPACT_LEARN: |
c2d936a4 BP |
6560 | return learn_check(ofpact_get_LEARN(a), flow); |
6561 | ||
18080541 BP |
6562 | case OFPACT_CONJUNCTION: |
6563 | return 0; | |
6564 | ||
d01c980f | 6565 | case OFPACT_MULTIPATH: |
c2d936a4 BP |
6566 | return multipath_check(ofpact_get_MULTIPATH(a), flow); |
6567 | ||
d01c980f BP |
6568 | case OFPACT_NOTE: |
6569 | case OFPACT_EXIT: | |
c2d936a4 | 6570 | return 0; |
d01c980f | 6571 | |
c2d936a4 BP |
6572 | case OFPACT_PUSH_MPLS: |
6573 | flow->dl_type = ofpact_get_PUSH_MPLS(a)->ethertype; | |
6574 | /* The packet is now MPLS and the MPLS payload is opaque. | |
6575 | * Thus nothing can be assumed about the network protocol. | |
6576 | * Temporarily mark that we have no nw_proto. */ | |
6577 | flow->nw_proto = 0; | |
6578 | return 0; | |
1e7db674 | 6579 | |
c2d936a4 BP |
6580 | case OFPACT_POP_MPLS: |
6581 | if (!eth_type_mpls(flow->dl_type)) { | |
6582 | inconsistent_match(usable_protocols); | |
6583 | } | |
6584 | flow->dl_type = ofpact_get_POP_MPLS(a)->ethertype; | |
6585 | return 0; | |
1e7db674 | 6586 | |
c2d936a4 BP |
6587 | case OFPACT_SAMPLE: |
6588 | return 0; | |
1e7db674 | 6589 | |
07659514 JS |
6590 | case OFPACT_CT: { |
6591 | struct ofpact_conntrack *oc = ofpact_get_CT(a); | |
76e3e669 | 6592 | enum ofperr err; |
07659514 JS |
6593 | |
6594 | if (!dl_type_is_ip_any(flow->dl_type) | |
6595 | || (flow->ct_state & CS_INVALID && oc->flags & NX_CT_F_COMMIT)) { | |
6596 | inconsistent_match(usable_protocols); | |
6597 | } | |
6598 | ||
6599 | if (oc->zone_src.field) { | |
6600 | return mf_check_src(&oc->zone_src, flow); | |
6601 | } | |
8e53fe8c | 6602 | |
76e3e669 JR |
6603 | err = ofpacts_check(oc->actions, ofpact_ct_get_action_len(oc), |
6604 | flow, max_ports, table_id, n_tables, | |
6605 | usable_protocols); | |
6606 | return err; | |
07659514 JS |
6607 | } |
6608 | ||
9ac0aada JR |
6609 | case OFPACT_NAT: { |
6610 | struct ofpact_nat *on = ofpact_get_NAT(a); | |
6611 | ||
6612 | if (!dl_type_is_ip_any(flow->dl_type) || | |
6613 | (on->range_af == AF_INET && flow->dl_type != htons(ETH_TYPE_IP)) || | |
6614 | (on->range_af == AF_INET6 | |
6615 | && flow->dl_type != htons(ETH_TYPE_IPV6))) { | |
6616 | inconsistent_match(usable_protocols); | |
6617 | } | |
6618 | return 0; | |
6619 | } | |
6620 | ||
c2d936a4 BP |
6621 | case OFPACT_CLEAR_ACTIONS: |
6622 | return 0; | |
1e7db674 | 6623 | |
c2d936a4 BP |
6624 | case OFPACT_WRITE_ACTIONS: { |
6625 | /* Use a temporary copy of 'usable_protocols' because we can't check | |
6626 | * consistency of an action set. */ | |
6627 | struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a); | |
6628 | enum ofputil_protocol p = *usable_protocols; | |
6629 | return ofpacts_check(on->actions, ofpact_nest_get_action_len(on), | |
6630 | flow, max_ports, table_id, n_tables, &p); | |
6631 | } | |
1e7db674 | 6632 | |
c2d936a4 BP |
6633 | case OFPACT_WRITE_METADATA: |
6634 | return 0; | |
1e7db674 | 6635 | |
c2d936a4 BP |
6636 | case OFPACT_METER: { |
6637 | uint32_t mid = ofpact_get_METER(a)->meter_id; | |
6638 | if (mid == 0 || mid > OFPM13_MAX) { | |
6639 | return OFPERR_OFPMMFC_INVALID_METER; | |
6640 | } | |
6641 | return 0; | |
6642 | } | |
1e7db674 | 6643 | |
c2d936a4 BP |
6644 | case OFPACT_GOTO_TABLE: { |
6645 | uint8_t goto_table = ofpact_get_GOTO_TABLE(a)->table_id; | |
6646 | if ((table_id != 255 && goto_table <= table_id) | |
6647 | || (n_tables != 255 && goto_table >= n_tables)) { | |
8c87971e | 6648 | return OFPERR_OFPBIC_BAD_TABLE_ID; |
c2d936a4 BP |
6649 | } |
6650 | return 0; | |
6651 | } | |
1e7db674 | 6652 | |
c2d936a4 BP |
6653 | case OFPACT_GROUP: |
6654 | return 0; | |
1e7db674 | 6655 | |
e672ff9b JR |
6656 | case OFPACT_UNROLL_XLATE: |
6657 | /* UNROLL is an internal action that should never be seen via | |
6658 | * OpenFlow. */ | |
6659 | return OFPERR_OFPBAC_BAD_TYPE; | |
6660 | ||
d4abaff5 BP |
6661 | case OFPACT_DEBUG_RECIRC: |
6662 | return 0; | |
6663 | ||
c2d936a4 BP |
6664 | default: |
6665 | OVS_NOT_REACHED(); | |
6666 | } | |
6667 | } | |
1e7db674 | 6668 | |
c2d936a4 BP |
6669 | /* Checks that the 'ofpacts_len' bytes of actions in 'ofpacts' are |
6670 | * appropriate for a packet with the prerequisites satisfied by 'flow' in a | |
6671 | * switch with no more than 'max_ports' ports. | |
6672 | * | |
6673 | * If 'ofpacts' and 'flow' are inconsistent with one another, un-sets in | |
6674 | * '*usable_protocols' the protocols that forbid the inconsistency. (An | |
6675 | * example of an inconsistency between match and actions is a flow that does | |
6676 | * not match on an MPLS Ethertype but has an action that pops an MPLS label.) | |
6677 | * | |
6678 | * May annotate ofpacts with information gathered from the 'flow'. | |
6679 | * | |
6680 | * May temporarily modify 'flow', but restores the changes before returning. */ | |
6681 | enum ofperr | |
6682 | ofpacts_check(struct ofpact ofpacts[], size_t ofpacts_len, | |
6683 | struct flow *flow, ofp_port_t max_ports, | |
6684 | uint8_t table_id, uint8_t n_tables, | |
6685 | enum ofputil_protocol *usable_protocols) | |
6686 | { | |
6687 | struct ofpact *a; | |
6688 | ovs_be16 dl_type = flow->dl_type; | |
6689 | ovs_be16 vlan_tci = flow->vlan_tci; | |
6690 | uint8_t nw_proto = flow->nw_proto; | |
6691 | enum ofperr error = 0; | |
1e7db674 | 6692 | |
c2d936a4 BP |
6693 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
6694 | error = ofpact_check__(usable_protocols, a, flow, | |
6695 | max_ports, table_id, n_tables); | |
6696 | if (error) { | |
1e7db674 | 6697 | break; |
c2d936a4 BP |
6698 | } |
6699 | } | |
6700 | /* Restore fields that may have been modified. */ | |
6701 | flow->dl_type = dl_type; | |
6702 | flow->vlan_tci = vlan_tci; | |
6703 | flow->nw_proto = nw_proto; | |
6704 | return error; | |
6705 | } | |
1e7db674 | 6706 | |
c2d936a4 BP |
6707 | /* Like ofpacts_check(), but reports inconsistencies as |
6708 | * OFPERR_OFPBAC_MATCH_INCONSISTENT rather than clearing bits. */ | |
6709 | enum ofperr | |
6710 | ofpacts_check_consistency(struct ofpact ofpacts[], size_t ofpacts_len, | |
6711 | struct flow *flow, ofp_port_t max_ports, | |
6712 | uint8_t table_id, uint8_t n_tables, | |
6713 | enum ofputil_protocol usable_protocols) | |
6714 | { | |
6715 | enum ofputil_protocol p = usable_protocols; | |
6716 | enum ofperr error; | |
1e7db674 | 6717 | |
c2d936a4 BP |
6718 | error = ofpacts_check(ofpacts, ofpacts_len, flow, max_ports, |
6719 | table_id, n_tables, &p); | |
6720 | return (error ? error | |
6721 | : p != usable_protocols ? OFPERR_OFPBAC_MATCH_INCONSISTENT | |
6722 | : 0); | |
6723 | } | |
097d4939 | 6724 | |
28f5311f JS |
6725 | /* Returns the destination field that 'ofpact' would write to, or NULL |
6726 | * if the action would not write to an mf_field. */ | |
6727 | const struct mf_field * | |
6728 | ofpact_get_mf_dst(const struct ofpact *ofpact) | |
8e53fe8c | 6729 | { |
28f5311f JS |
6730 | if (ofpact->type == OFPACT_SET_FIELD) { |
6731 | const struct ofpact_set_field *orl; | |
8e53fe8c | 6732 | |
28f5311f | 6733 | orl = CONTAINER_OF(ofpact, struct ofpact_set_field, ofpact); |
8e53fe8c | 6734 | return orl->field; |
28f5311f JS |
6735 | } else if (ofpact->type == OFPACT_REG_MOVE) { |
6736 | const struct ofpact_reg_move *orm; | |
8e53fe8c | 6737 | |
28f5311f | 6738 | orm = CONTAINER_OF(ofpact, struct ofpact_reg_move, ofpact); |
8e53fe8c JS |
6739 | return orm->dst.field; |
6740 | } | |
6741 | ||
6742 | return NULL; | |
6743 | } | |
6744 | ||
6745 | static enum ofperr | |
6746 | unsupported_nesting(enum ofpact_type action, enum ofpact_type outer_action) | |
6747 | { | |
6748 | VLOG_WARN("%s action doesn't support nested action %s", | |
6749 | ofpact_name(outer_action), ofpact_name(action)); | |
6750 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
6751 | } | |
6752 | ||
6753 | static bool | |
6754 | field_requires_ct(enum mf_field_id field) | |
6755 | { | |
9daf2348 | 6756 | return field == MFF_CT_MARK || field == MFF_CT_LABEL; |
8e53fe8c JS |
6757 | } |
6758 | ||
6759 | /* Apply nesting constraints for actions */ | |
d824b5b7 JS |
6760 | static enum ofperr |
6761 | ofpacts_verify_nested(const struct ofpact *a, enum ofpact_type outer_action) | |
6762 | { | |
28f5311f | 6763 | const struct mf_field *field = ofpact_get_mf_dst(a); |
8e53fe8c JS |
6764 | |
6765 | if (field && field_requires_ct(field->id) && outer_action != OFPACT_CT) { | |
6766 | VLOG_WARN("cannot set CT fields outside of ct action"); | |
6767 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
6768 | } | |
9ac0aada JR |
6769 | if (a->type == OFPACT_NAT) { |
6770 | if (outer_action != OFPACT_CT) { | |
6771 | VLOG_WARN("Cannot have NAT action outside of \"ct\" action"); | |
6772 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
6773 | } | |
6774 | return 0; | |
6775 | } | |
8e53fe8c JS |
6776 | |
6777 | if (outer_action) { | |
6778 | ovs_assert(outer_action == OFPACT_WRITE_ACTIONS | |
6779 | || outer_action == OFPACT_CT); | |
6780 | ||
6781 | if (outer_action == OFPACT_CT) { | |
6782 | if (!field) { | |
6783 | return unsupported_nesting(a->type, outer_action); | |
6784 | } else if (!field_requires_ct(field->id)) { | |
6785 | VLOG_WARN("%s action doesn't support nested modification " | |
6786 | "of %s", ofpact_name(outer_action), field->name); | |
6787 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
6788 | } | |
6789 | } | |
d824b5b7 JS |
6790 | } |
6791 | ||
6792 | return 0; | |
6793 | } | |
6794 | ||
18080541 BP |
6795 | /* Verifies that the 'ofpacts_len' bytes of actions in 'ofpacts' are in the |
6796 | * appropriate order as defined by the OpenFlow spec and as required by Open | |
6797 | * vSwitch. | |
6798 | * | |
6799 | * 'allowed_ovsinsts' is a bitmap of OVSINST_* values, in which 1-bits indicate | |
d824b5b7 JS |
6800 | * instructions that are allowed within 'ofpacts[]'. |
6801 | * | |
6802 | * If 'outer_action' is not zero, it specifies that the actions are nested | |
6803 | * within another action of type 'outer_action'. */ | |
c2d936a4 BP |
6804 | static enum ofperr |
6805 | ofpacts_verify(const struct ofpact ofpacts[], size_t ofpacts_len, | |
d824b5b7 | 6806 | uint32_t allowed_ovsinsts, enum ofpact_type outer_action) |
c2d936a4 BP |
6807 | { |
6808 | const struct ofpact *a; | |
6809 | enum ovs_instruction_type inst; | |
097d4939 | 6810 | |
c2d936a4 BP |
6811 | inst = OVSINST_OFPIT13_METER; |
6812 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
6813 | enum ovs_instruction_type next; | |
8e53fe8c | 6814 | enum ofperr error; |
1e7db674 | 6815 | |
18080541 BP |
6816 | if (a->type == OFPACT_CONJUNCTION) { |
6817 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
f08e39dd BP |
6818 | if (a->type != OFPACT_CONJUNCTION && a->type != OFPACT_NOTE) { |
6819 | VLOG_WARN("\"conjunction\" actions may be used along with " | |
6820 | "\"note\" but not any other kind of action " | |
6821 | "(such as the \"%s\" action used here)", | |
96775a1c | 6822 | ofpact_name(a->type)); |
18080541 BP |
6823 | return OFPERR_NXBAC_BAD_CONJUNCTION; |
6824 | } | |
6825 | } | |
6826 | return 0; | |
6827 | } | |
6828 | ||
8e53fe8c JS |
6829 | error = ofpacts_verify_nested(a, outer_action); |
6830 | if (error) { | |
6831 | return error; | |
d824b5b7 JS |
6832 | } |
6833 | ||
c2d936a4 BP |
6834 | next = ovs_instruction_type_from_ofpact_type(a->type); |
6835 | if (a > ofpacts | |
6836 | && (inst == OVSINST_OFPIT11_APPLY_ACTIONS | |
6837 | ? next < inst | |
6838 | : next <= inst)) { | |
6839 | const char *name = ovs_instruction_name_from_type(inst); | |
6840 | const char *next_name = ovs_instruction_name_from_type(next); | |
1e7db674 | 6841 | |
c2d936a4 BP |
6842 | if (next == inst) { |
6843 | VLOG_WARN("duplicate %s instruction not allowed, for OpenFlow " | |
6844 | "1.1+ compatibility", name); | |
6845 | } else { | |
6846 | VLOG_WARN("invalid instruction ordering: %s must appear " | |
6847 | "before %s, for OpenFlow 1.1+ compatibility", | |
6848 | next_name, name); | |
6849 | } | |
6850 | return OFPERR_OFPBAC_UNSUPPORTED_ORDER; | |
6851 | } | |
6852 | if (!((1u << next) & allowed_ovsinsts)) { | |
6853 | const char *name = ovs_instruction_name_from_type(next); | |
1e7db674 | 6854 | |
c2d936a4 BP |
6855 | VLOG_WARN("%s instruction not allowed here", name); |
6856 | return OFPERR_OFPBIC_UNSUP_INST; | |
1e7db674 | 6857 | } |
c2d936a4 BP |
6858 | |
6859 | inst = next; | |
6860 | } | |
6861 | ||
6862 | return 0; | |
6863 | } | |
6864 | \f | |
6865 | /* Converting ofpacts to OpenFlow. */ | |
6866 | ||
6867 | static void | |
6868 | encode_ofpact(const struct ofpact *a, enum ofp_version ofp_version, | |
6869 | struct ofpbuf *out) | |
6870 | { | |
6871 | switch (a->type) { | |
6872 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
6873 | case OFPACT_##ENUM: \ | |
355ead69 GS |
6874 | encode_##ENUM(ofpact_get_##ENUM(a), ofp_version, out); \ |
6875 | return; | |
c2d936a4 BP |
6876 | OFPACTS |
6877 | #undef OFPACT | |
6878 | default: | |
6879 | OVS_NOT_REACHED(); | |
1e7db674 | 6880 | } |
e3f8f887 JR |
6881 | } |
6882 | ||
6883 | /* Converts the 'ofpacts_len' bytes of ofpacts in 'ofpacts' into OpenFlow | |
6884 | * actions in 'openflow', appending the actions to any existing data in | |
d01c980f | 6885 | * 'openflow'. */ |
a07c15bc | 6886 | size_t |
e3f8f887 JR |
6887 | ofpacts_put_openflow_actions(const struct ofpact ofpacts[], size_t ofpacts_len, |
6888 | struct ofpbuf *openflow, | |
6889 | enum ofp_version ofp_version) | |
d01c980f BP |
6890 | { |
6891 | const struct ofpact *a; | |
6fd6ed71 | 6892 | size_t start_size = openflow->size; |
d01c980f BP |
6893 | |
6894 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
c2d936a4 | 6895 | encode_ofpact(a, ofp_version, openflow); |
d01c980f | 6896 | } |
6fd6ed71 | 6897 | return openflow->size - start_size; |
d01c980f BP |
6898 | } |
6899 | ||
c2d936a4 BP |
6900 | static enum ovs_instruction_type |
6901 | ofpact_is_apply_actions(const struct ofpact *a) | |
d01c980f | 6902 | { |
c2d936a4 BP |
6903 | return (ovs_instruction_type_from_ofpact_type(a->type) |
6904 | == OVSINST_OFPIT11_APPLY_ACTIONS); | |
d01c980f | 6905 | } |
8dd54666 IY |
6906 | |
6907 | void | |
e3f8f887 JR |
6908 | ofpacts_put_openflow_instructions(const struct ofpact ofpacts[], |
6909 | size_t ofpacts_len, | |
6910 | struct ofpbuf *openflow, | |
6911 | enum ofp_version ofp_version) | |
8dd54666 | 6912 | { |
c2d936a4 | 6913 | const struct ofpact *end = ofpact_end(ofpacts, ofpacts_len); |
8dd54666 IY |
6914 | const struct ofpact *a; |
6915 | ||
8f2cded4 BP |
6916 | if (ofp_version == OFP10_VERSION) { |
6917 | ofpacts_put_openflow_actions(ofpacts, ofpacts_len, openflow, | |
6918 | ofp_version); | |
6919 | return; | |
6920 | } | |
e3f8f887 | 6921 | |
c2d936a4 BP |
6922 | a = ofpacts; |
6923 | while (a < end) { | |
6924 | if (ofpact_is_apply_actions(a)) { | |
6fd6ed71 | 6925 | size_t ofs = openflow->size; |
8dd54666 IY |
6926 | |
6927 | instruction_put_OFPIT11_APPLY_ACTIONS(openflow); | |
c2d936a4 BP |
6928 | do { |
6929 | encode_ofpact(a, ofp_version, openflow); | |
6930 | a = ofpact_next(a); | |
6931 | } while (a < end && ofpact_is_apply_actions(a)); | |
7fdb60a7 | 6932 | ofpacts_update_instruction_actions(openflow, ofs); |
c2d936a4 BP |
6933 | } else { |
6934 | encode_ofpact(a, ofp_version, openflow); | |
6935 | a = ofpact_next(a); | |
8dd54666 IY |
6936 | } |
6937 | } | |
6938 | } | |
d01c980f | 6939 | \f |
08d1e234 BP |
6940 | /* Sets of supported actions. */ |
6941 | ||
6942 | /* Two-way translation between OVS's internal "OFPACT_*" representation of | |
6943 | * actions and the "OFPAT_*" representation used in some OpenFlow version. | |
6944 | * (OFPAT_* numbering varies from one OpenFlow version to another, so a given | |
6945 | * instance is specific to one OpenFlow version.) */ | |
6946 | struct ofpact_map { | |
6947 | enum ofpact_type ofpact; /* Internal name for action type. */ | |
6948 | int ofpat; /* OFPAT_* number from OpenFlow spec. */ | |
6949 | }; | |
6950 | ||
6951 | static const struct ofpact_map * | |
6952 | get_ofpact_map(enum ofp_version version) | |
6953 | { | |
6954 | /* OpenFlow 1.0 actions. */ | |
6955 | static const struct ofpact_map of10[] = { | |
6956 | { OFPACT_OUTPUT, 0 }, | |
6957 | { OFPACT_SET_VLAN_VID, 1 }, | |
6958 | { OFPACT_SET_VLAN_PCP, 2 }, | |
6959 | { OFPACT_STRIP_VLAN, 3 }, | |
6960 | { OFPACT_SET_ETH_SRC, 4 }, | |
6961 | { OFPACT_SET_ETH_DST, 5 }, | |
6962 | { OFPACT_SET_IPV4_SRC, 6 }, | |
6963 | { OFPACT_SET_IPV4_DST, 7 }, | |
6964 | { OFPACT_SET_IP_DSCP, 8 }, | |
6965 | { OFPACT_SET_L4_SRC_PORT, 9 }, | |
6966 | { OFPACT_SET_L4_DST_PORT, 10 }, | |
6967 | { OFPACT_ENQUEUE, 11 }, | |
6968 | { 0, -1 }, | |
6969 | }; | |
6970 | ||
6971 | /* OpenFlow 1.1 actions. */ | |
6972 | static const struct ofpact_map of11[] = { | |
6973 | { OFPACT_OUTPUT, 0 }, | |
6974 | { OFPACT_SET_VLAN_VID, 1 }, | |
6975 | { OFPACT_SET_VLAN_PCP, 2 }, | |
6976 | { OFPACT_SET_ETH_SRC, 3 }, | |
6977 | { OFPACT_SET_ETH_DST, 4 }, | |
6978 | { OFPACT_SET_IPV4_SRC, 5 }, | |
6979 | { OFPACT_SET_IPV4_DST, 6 }, | |
6980 | { OFPACT_SET_IP_DSCP, 7 }, | |
6981 | { OFPACT_SET_IP_ECN, 8 }, | |
6982 | { OFPACT_SET_L4_SRC_PORT, 9 }, | |
6983 | { OFPACT_SET_L4_DST_PORT, 10 }, | |
6984 | /* OFPAT_COPY_TTL_OUT (11) not supported. */ | |
6985 | /* OFPAT_COPY_TTL_IN (12) not supported. */ | |
6986 | { OFPACT_SET_MPLS_LABEL, 13 }, | |
6987 | { OFPACT_SET_MPLS_TC, 14 }, | |
6988 | { OFPACT_SET_MPLS_TTL, 15 }, | |
6989 | { OFPACT_DEC_MPLS_TTL, 16 }, | |
6990 | { OFPACT_PUSH_VLAN, 17 }, | |
6991 | { OFPACT_STRIP_VLAN, 18 }, | |
6992 | { OFPACT_PUSH_MPLS, 19 }, | |
6993 | { OFPACT_POP_MPLS, 20 }, | |
6994 | { OFPACT_SET_QUEUE, 21 }, | |
6995 | { OFPACT_GROUP, 22 }, | |
6996 | { OFPACT_SET_IP_TTL, 23 }, | |
6997 | { OFPACT_DEC_TTL, 24 }, | |
6998 | { 0, -1 }, | |
6999 | }; | |
7000 | ||
7001 | /* OpenFlow 1.2, 1.3, and 1.4 actions. */ | |
7002 | static const struct ofpact_map of12[] = { | |
7003 | { OFPACT_OUTPUT, 0 }, | |
7004 | /* OFPAT_COPY_TTL_OUT (11) not supported. */ | |
7005 | /* OFPAT_COPY_TTL_IN (12) not supported. */ | |
7006 | { OFPACT_SET_MPLS_TTL, 15 }, | |
7007 | { OFPACT_DEC_MPLS_TTL, 16 }, | |
7008 | { OFPACT_PUSH_VLAN, 17 }, | |
7009 | { OFPACT_STRIP_VLAN, 18 }, | |
7010 | { OFPACT_PUSH_MPLS, 19 }, | |
7011 | { OFPACT_POP_MPLS, 20 }, | |
7012 | { OFPACT_SET_QUEUE, 21 }, | |
7013 | { OFPACT_GROUP, 22 }, | |
7014 | { OFPACT_SET_IP_TTL, 23 }, | |
7015 | { OFPACT_DEC_TTL, 24 }, | |
7016 | { OFPACT_SET_FIELD, 25 }, | |
7017 | /* OF1.3+ OFPAT_PUSH_PBB (26) not supported. */ | |
7018 | /* OF1.3+ OFPAT_POP_PBB (27) not supported. */ | |
7019 | { 0, -1 }, | |
7020 | }; | |
7021 | ||
7022 | switch (version) { | |
7023 | case OFP10_VERSION: | |
7024 | return of10; | |
7025 | ||
7026 | case OFP11_VERSION: | |
7027 | return of11; | |
7028 | ||
7029 | case OFP12_VERSION: | |
7030 | case OFP13_VERSION: | |
7031 | case OFP14_VERSION: | |
7032 | case OFP15_VERSION: | |
7033 | default: | |
7034 | return of12; | |
7035 | } | |
7036 | } | |
7037 | ||
7038 | /* Converts 'ofpacts_bitmap', a bitmap whose bits correspond to OFPACT_* | |
7039 | * values, into a bitmap of actions suitable for OpenFlow 'version', and | |
7040 | * returns the result. */ | |
7041 | ovs_be32 | |
7042 | ofpact_bitmap_to_openflow(uint64_t ofpacts_bitmap, enum ofp_version version) | |
7043 | { | |
7044 | uint32_t openflow_bitmap = 0; | |
7045 | const struct ofpact_map *x; | |
7046 | ||
7047 | for (x = get_ofpact_map(version); x->ofpat >= 0; x++) { | |
7048 | if (ofpacts_bitmap & (UINT64_C(1) << x->ofpact)) { | |
7049 | openflow_bitmap |= 1u << x->ofpat; | |
7050 | } | |
7051 | } | |
7052 | return htonl(openflow_bitmap); | |
7053 | } | |
7054 | ||
7055 | /* Converts 'ofpat_bitmap', a bitmap of actions from an OpenFlow message with | |
7056 | * the given 'version' into a bitmap whose bits correspond to OFPACT_* values, | |
7057 | * and returns the result. */ | |
7058 | uint64_t | |
7059 | ofpact_bitmap_from_openflow(ovs_be32 ofpat_bitmap, enum ofp_version version) | |
7060 | { | |
7061 | uint64_t ofpact_bitmap = 0; | |
7062 | const struct ofpact_map *x; | |
7063 | ||
7064 | for (x = get_ofpact_map(version); x->ofpat >= 0; x++) { | |
7065 | if (ofpat_bitmap & htonl(1u << x->ofpat)) { | |
7066 | ofpact_bitmap |= UINT64_C(1) << x->ofpact; | |
7067 | } | |
7068 | } | |
7069 | return ofpact_bitmap; | |
7070 | } | |
7071 | ||
7072 | /* Appends to 's' a string representation of the set of OFPACT_* represented | |
7073 | * by 'ofpacts_bitmap'. */ | |
7074 | void | |
7075 | ofpact_bitmap_format(uint64_t ofpacts_bitmap, struct ds *s) | |
7076 | { | |
7077 | if (!ofpacts_bitmap) { | |
7078 | ds_put_cstr(s, "<none>"); | |
7079 | } else { | |
7080 | while (ofpacts_bitmap) { | |
7081 | ds_put_format(s, "%s ", | |
7082 | ofpact_name(rightmost_1bit_idx(ofpacts_bitmap))); | |
7083 | ofpacts_bitmap = zero_rightmost_1bit(ofpacts_bitmap); | |
7084 | } | |
7085 | ds_chomp(s, ' '); | |
7086 | } | |
7087 | } | |
7088 | \f | |
f25d0cf3 BP |
7089 | /* Returns true if 'action' outputs to 'port', false otherwise. */ |
7090 | static bool | |
4e022ec0 | 7091 | ofpact_outputs_to_port(const struct ofpact *ofpact, ofp_port_t port) |
f25d0cf3 BP |
7092 | { |
7093 | switch (ofpact->type) { | |
7094 | case OFPACT_OUTPUT: | |
7095 | return ofpact_get_OUTPUT(ofpact)->port == port; | |
7096 | case OFPACT_ENQUEUE: | |
7097 | return ofpact_get_ENQUEUE(ofpact)->port == port; | |
7098 | case OFPACT_CONTROLLER: | |
7099 | return port == OFPP_CONTROLLER; | |
7100 | ||
7101 | case OFPACT_OUTPUT_REG: | |
7102 | case OFPACT_BUNDLE: | |
7103 | case OFPACT_SET_VLAN_VID: | |
7104 | case OFPACT_SET_VLAN_PCP: | |
7105 | case OFPACT_STRIP_VLAN: | |
3e34fbdd | 7106 | case OFPACT_PUSH_VLAN: |
f25d0cf3 BP |
7107 | case OFPACT_SET_ETH_SRC: |
7108 | case OFPACT_SET_ETH_DST: | |
7109 | case OFPACT_SET_IPV4_SRC: | |
7110 | case OFPACT_SET_IPV4_DST: | |
04f01c24 | 7111 | case OFPACT_SET_IP_DSCP: |
ff14eb7a | 7112 | case OFPACT_SET_IP_ECN: |
0c20dbe4 | 7113 | case OFPACT_SET_IP_TTL: |
f25d0cf3 BP |
7114 | case OFPACT_SET_L4_SRC_PORT: |
7115 | case OFPACT_SET_L4_DST_PORT: | |
7116 | case OFPACT_REG_MOVE: | |
b2dd70be | 7117 | case OFPACT_SET_FIELD: |
bd85dac1 AZ |
7118 | case OFPACT_STACK_PUSH: |
7119 | case OFPACT_STACK_POP: | |
f25d0cf3 | 7120 | case OFPACT_DEC_TTL: |
097d4939 JR |
7121 | case OFPACT_SET_MPLS_LABEL: |
7122 | case OFPACT_SET_MPLS_TC: | |
0f3f3c3d | 7123 | case OFPACT_SET_MPLS_TTL: |
b676167a | 7124 | case OFPACT_DEC_MPLS_TTL: |
f25d0cf3 | 7125 | case OFPACT_SET_TUNNEL: |
4cceacb9 | 7126 | case OFPACT_WRITE_METADATA: |
f25d0cf3 BP |
7127 | case OFPACT_SET_QUEUE: |
7128 | case OFPACT_POP_QUEUE: | |
7129 | case OFPACT_FIN_TIMEOUT: | |
7130 | case OFPACT_RESUBMIT: | |
7131 | case OFPACT_LEARN: | |
18080541 | 7132 | case OFPACT_CONJUNCTION: |
f25d0cf3 | 7133 | case OFPACT_MULTIPATH: |
f25d0cf3 BP |
7134 | case OFPACT_NOTE: |
7135 | case OFPACT_EXIT: | |
e672ff9b | 7136 | case OFPACT_UNROLL_XLATE: |
b02475c5 SH |
7137 | case OFPACT_PUSH_MPLS: |
7138 | case OFPACT_POP_MPLS: | |
29089a54 | 7139 | case OFPACT_SAMPLE: |
b19e8793 | 7140 | case OFPACT_CLEAR_ACTIONS: |
7fdb60a7 | 7141 | case OFPACT_WRITE_ACTIONS: |
8dd54666 | 7142 | case OFPACT_GOTO_TABLE: |
638a19b0 | 7143 | case OFPACT_METER: |
7395c052 | 7144 | case OFPACT_GROUP: |
d4abaff5 | 7145 | case OFPACT_DEBUG_RECIRC: |
07659514 | 7146 | case OFPACT_CT: |
9ac0aada | 7147 | case OFPACT_NAT: |
f25d0cf3 BP |
7148 | default: |
7149 | return false; | |
7150 | } | |
7151 | } | |
7152 | ||
7153 | /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs | |
7154 | * to 'port', false otherwise. */ | |
7155 | bool | |
7156 | ofpacts_output_to_port(const struct ofpact *ofpacts, size_t ofpacts_len, | |
4e022ec0 | 7157 | ofp_port_t port) |
c2d936a4 BP |
7158 | { |
7159 | const struct ofpact *a; | |
f25d0cf3 | 7160 | |
4f20179d | 7161 | OFPACT_FOR_EACH_FLATTENED (a, ofpacts, ofpacts_len) { |
c2d936a4 BP |
7162 | if (ofpact_outputs_to_port(a, port)) { |
7163 | return true; | |
7164 | } | |
7165 | } | |
f25d0cf3 | 7166 | |
c2d936a4 BP |
7167 | return false; |
7168 | } | |
f25d0cf3 | 7169 | |
c2d936a4 BP |
7170 | /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs |
7171 | * to 'group', false otherwise. */ | |
7172 | bool | |
7173 | ofpacts_output_to_group(const struct ofpact *ofpacts, size_t ofpacts_len, | |
7174 | uint32_t group_id) | |
7175 | { | |
7176 | const struct ofpact *a; | |
b02475c5 | 7177 | |
4f20179d | 7178 | OFPACT_FOR_EACH_FLATTENED (a, ofpacts, ofpacts_len) { |
c2d936a4 BP |
7179 | if (a->type == OFPACT_GROUP |
7180 | && ofpact_get_GROUP(a)->group_id == group_id) { | |
7181 | return true; | |
7182 | } | |
7183 | } | |
b02475c5 | 7184 | |
c2d936a4 BP |
7185 | return false; |
7186 | } | |
8dd54666 | 7187 | |
c2d936a4 BP |
7188 | bool |
7189 | ofpacts_equal(const struct ofpact *a, size_t a_len, | |
7190 | const struct ofpact *b, size_t b_len) | |
7191 | { | |
7192 | return a_len == b_len && !memcmp(a, b, a_len); | |
7193 | } | |
29089a54 | 7194 | |
c2d936a4 BP |
7195 | /* Finds the OFPACT_METER action, if any, in the 'ofpacts_len' bytes of |
7196 | * 'ofpacts'. If found, returns its meter ID; if not, returns 0. | |
7197 | * | |
7198 | * This function relies on the order of 'ofpacts' being correct (as checked by | |
7199 | * ofpacts_verify()). */ | |
7200 | uint32_t | |
7201 | ofpacts_get_meter(const struct ofpact ofpacts[], size_t ofpacts_len) | |
7202 | { | |
7203 | const struct ofpact *a; | |
7fdb60a7 | 7204 | |
c2d936a4 BP |
7205 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
7206 | enum ovs_instruction_type inst; | |
b19e8793 | 7207 | |
c2d936a4 BP |
7208 | inst = ovs_instruction_type_from_ofpact_type(a->type); |
7209 | if (a->type == OFPACT_METER) { | |
7210 | return ofpact_get_METER(a)->meter_id; | |
7211 | } else if (inst > OVSINST_OFPIT13_METER) { | |
7212 | break; | |
4cceacb9 | 7213 | } |
c2d936a4 | 7214 | } |
638a19b0 | 7215 | |
c2d936a4 BP |
7216 | return 0; |
7217 | } | |
7218 | \f | |
7219 | /* Formatting ofpacts. */ | |
7395c052 | 7220 | |
c2d936a4 BP |
7221 | static void |
7222 | ofpact_format(const struct ofpact *a, struct ds *s) | |
7223 | { | |
7224 | switch (a->type) { | |
7225 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
7226 | case OFPACT_##ENUM: \ | |
7227 | format_##ENUM(ALIGNED_CAST(const struct STRUCT *, a), s); \ | |
7228 | break; | |
7229 | OFPACTS | |
7230 | #undef OFPACT | |
7231 | default: | |
7232 | OVS_NOT_REACHED(); | |
f25d0cf3 BP |
7233 | } |
7234 | } | |
7235 | ||
7236 | /* Appends a string representing the 'ofpacts_len' bytes of ofpacts in | |
7237 | * 'ofpacts' to 'string'. */ | |
7238 | void | |
7239 | ofpacts_format(const struct ofpact *ofpacts, size_t ofpacts_len, | |
7240 | struct ds *string) | |
7241 | { | |
f25d0cf3 BP |
7242 | if (!ofpacts_len) { |
7243 | ds_put_cstr(string, "drop"); | |
7244 | } else { | |
7245 | const struct ofpact *a; | |
7246 | ||
7247 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
7248 | if (a != ofpacts) { | |
7249 | ds_put_cstr(string, ","); | |
7250 | } | |
8dd54666 | 7251 | |
5dca28b5 | 7252 | /* XXX write-actions */ |
f25d0cf3 BP |
7253 | ofpact_format(a, string); |
7254 | } | |
7255 | } | |
7256 | } | |
7257 | \f | |
7258 | /* Internal use by helpers. */ | |
7259 | ||
7260 | void * | |
7261 | ofpact_put(struct ofpbuf *ofpacts, enum ofpact_type type, size_t len) | |
7262 | { | |
7263 | struct ofpact *ofpact; | |
7264 | ||
6fd6ed71 PS |
7265 | ofpacts->header = ofpbuf_put_uninit(ofpacts, len); |
7266 | ofpact = ofpacts->header; | |
f25d0cf3 BP |
7267 | ofpact_init(ofpact, type, len); |
7268 | return ofpact; | |
7269 | } | |
7270 | ||
7271 | void | |
7272 | ofpact_init(struct ofpact *ofpact, enum ofpact_type type, size_t len) | |
7273 | { | |
7274 | memset(ofpact, 0, len); | |
7275 | ofpact->type = type; | |
c2d936a4 | 7276 | ofpact->raw = -1; |
f25d0cf3 BP |
7277 | ofpact->len = len; |
7278 | } | |
7279 | \f | |
2bd318de BP |
7280 | /* Finishes composing a variable-length action (begun using |
7281 | * ofpact_put_<NAME>()), by padding the action to a multiple of OFPACT_ALIGNTO | |
7282 | * bytes and updating its embedded length field. See the large comment near | |
7283 | * the end of ofp-actions.h for more information. */ | |
f25d0cf3 | 7284 | void |
34abaa3d | 7285 | ofpact_finish(struct ofpbuf *ofpacts, struct ofpact *ofpact) |
f25d0cf3 | 7286 | { |
6fd6ed71 | 7287 | ovs_assert(ofpact == ofpacts->header); |
f25d0cf3 | 7288 | ofpact->len = (char *) ofpbuf_tail(ofpacts) - (char *) ofpact; |
2bd318de | 7289 | ofpbuf_padto(ofpacts, OFPACT_ALIGN(ofpacts->size)); |
f25d0cf3 | 7290 | } |
c2d936a4 | 7291 | \f |
cab50449 | 7292 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7293 | ofpact_parse(enum ofpact_type type, char *value, struct ofpbuf *ofpacts, |
7294 | enum ofputil_protocol *usable_protocols) | |
7295 | { | |
7296 | switch (type) { | |
7297 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
7298 | case OFPACT_##ENUM: \ | |
7299 | return parse_##ENUM(value, ofpacts, usable_protocols); | |
7300 | OFPACTS | |
7301 | #undef OFPACT | |
7302 | default: | |
7303 | OVS_NOT_REACHED(); | |
7304 | } | |
7305 | } | |
7306 | ||
7307 | static bool | |
7308 | ofpact_type_from_name(const char *name, enum ofpact_type *type) | |
7309 | { | |
7310 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
7311 | if (!strcasecmp(name, NAME)) { \ | |
7312 | *type = OFPACT_##ENUM; \ | |
7313 | return true; \ | |
7314 | } | |
7315 | OFPACTS | |
7316 | #undef OFPACT | |
7317 | ||
7318 | return false; | |
7319 | } | |
7320 | ||
7321 | /* Parses 'str' as a series of instructions, and appends them to 'ofpacts'. | |
7322 | * | |
7323 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
d824b5b7 JS |
7324 | * error. The caller is responsible for freeing the returned string. |
7325 | * | |
7326 | * If 'outer_action' is specified, indicates that the actions being parsed | |
7327 | * are nested within another action of the type specified in 'outer_action'. */ | |
cab50449 | 7328 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7329 | ofpacts_parse__(char *str, struct ofpbuf *ofpacts, |
7330 | enum ofputil_protocol *usable_protocols, | |
d824b5b7 | 7331 | bool allow_instructions, enum ofpact_type outer_action) |
c2d936a4 BP |
7332 | { |
7333 | int prev_inst = -1; | |
7334 | enum ofperr retval; | |
7335 | char *key, *value; | |
7336 | bool drop = false; | |
7337 | char *pos; | |
7338 | ||
7339 | pos = str; | |
7340 | while (ofputil_parse_key_value(&pos, &key, &value)) { | |
7341 | enum ovs_instruction_type inst = OVSINST_OFPIT11_APPLY_ACTIONS; | |
7342 | enum ofpact_type type; | |
7343 | char *error = NULL; | |
7344 | ofp_port_t port; | |
7345 | ||
7346 | if (ofpact_type_from_name(key, &type)) { | |
7347 | error = ofpact_parse(type, value, ofpacts, usable_protocols); | |
7348 | inst = ovs_instruction_type_from_ofpact_type(type); | |
7349 | } else if (!strcasecmp(key, "mod_vlan_vid")) { | |
7350 | error = parse_set_vlan_vid(value, ofpacts, true); | |
7351 | } else if (!strcasecmp(key, "mod_vlan_pcp")) { | |
7352 | error = parse_set_vlan_pcp(value, ofpacts, true); | |
7353 | } else if (!strcasecmp(key, "set_nw_ttl")) { | |
7354 | error = parse_SET_IP_TTL(value, ofpacts, usable_protocols); | |
7355 | } else if (!strcasecmp(key, "pop_vlan")) { | |
7356 | error = parse_pop_vlan(ofpacts); | |
7357 | } else if (!strcasecmp(key, "set_tunnel64")) { | |
7358 | error = parse_set_tunnel(value, ofpacts, | |
7359 | NXAST_RAW_SET_TUNNEL64); | |
7eb4b1f1 BP |
7360 | } else if (!strcasecmp(key, "load")) { |
7361 | error = parse_reg_load(value, ofpacts); | |
c2d936a4 BP |
7362 | } else if (!strcasecmp(key, "bundle_load")) { |
7363 | error = parse_bundle_load(value, ofpacts); | |
7364 | } else if (!strcasecmp(key, "drop")) { | |
7365 | drop = true; | |
7366 | } else if (!strcasecmp(key, "apply_actions")) { | |
7367 | return xstrdup("apply_actions is the default instruction"); | |
7368 | } else if (ofputil_port_from_string(key, &port)) { | |
7369 | ofpact_put_OUTPUT(ofpacts)->port = port; | |
7370 | } else { | |
7371 | return xasprintf("unknown action %s", key); | |
7372 | } | |
7373 | if (error) { | |
7374 | return error; | |
7375 | } | |
7376 | ||
7377 | if (inst != OVSINST_OFPIT11_APPLY_ACTIONS) { | |
7378 | if (!allow_instructions) { | |
7379 | return xasprintf("only actions are allowed here (not " | |
7380 | "instruction %s)", | |
7381 | ovs_instruction_name_from_type(inst)); | |
7382 | } | |
7383 | if (inst == prev_inst) { | |
7384 | return xasprintf("instruction %s may be specified only once", | |
7385 | ovs_instruction_name_from_type(inst)); | |
7386 | } | |
7387 | } | |
7388 | if (prev_inst != -1 && inst < prev_inst) { | |
7389 | return xasprintf("instruction %s must be specified before %s", | |
7390 | ovs_instruction_name_from_type(inst), | |
7391 | ovs_instruction_name_from_type(prev_inst)); | |
7392 | } | |
7393 | prev_inst = inst; | |
7394 | } | |
c2d936a4 | 7395 | |
6fd6ed71 | 7396 | if (drop && ofpacts->size) { |
c2d936a4 BP |
7397 | return xstrdup("\"drop\" must not be accompanied by any other action " |
7398 | "or instruction"); | |
7399 | } | |
7400 | ||
6fd6ed71 | 7401 | retval = ofpacts_verify(ofpacts->data, ofpacts->size, |
c2d936a4 BP |
7402 | (allow_instructions |
7403 | ? (1u << N_OVS_INSTRUCTIONS) - 1 | |
d824b5b7 JS |
7404 | : 1u << OVSINST_OFPIT11_APPLY_ACTIONS), |
7405 | outer_action); | |
c2d936a4 BP |
7406 | if (retval) { |
7407 | return xstrdup("Incorrect instruction ordering"); | |
7408 | } | |
7409 | ||
7410 | return NULL; | |
7411 | } | |
7412 | ||
cab50449 | 7413 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 7414 | ofpacts_parse(char *str, struct ofpbuf *ofpacts, |
d824b5b7 JS |
7415 | enum ofputil_protocol *usable_protocols, bool allow_instructions, |
7416 | enum ofpact_type outer_action) | |
c2d936a4 | 7417 | { |
6fd6ed71 | 7418 | uint32_t orig_size = ofpacts->size; |
c2d936a4 | 7419 | char *error = ofpacts_parse__(str, ofpacts, usable_protocols, |
d824b5b7 | 7420 | allow_instructions, outer_action); |
c2d936a4 | 7421 | if (error) { |
6fd6ed71 | 7422 | ofpacts->size = orig_size; |
c2d936a4 BP |
7423 | } |
7424 | return error; | |
7425 | } | |
7426 | ||
cab50449 | 7427 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7428 | ofpacts_parse_copy(const char *s_, struct ofpbuf *ofpacts, |
7429 | enum ofputil_protocol *usable_protocols, | |
d824b5b7 | 7430 | bool allow_instructions, enum ofpact_type outer_action) |
c2d936a4 BP |
7431 | { |
7432 | char *error, *s; | |
7433 | ||
7434 | *usable_protocols = OFPUTIL_P_ANY; | |
7435 | ||
7436 | s = xstrdup(s_); | |
d824b5b7 JS |
7437 | error = ofpacts_parse(s, ofpacts, usable_protocols, allow_instructions, |
7438 | outer_action); | |
c2d936a4 BP |
7439 | free(s); |
7440 | ||
7441 | return error; | |
7442 | } | |
7443 | ||
7444 | /* Parses 's' as a set of OpenFlow actions and appends the actions to | |
d824b5b7 JS |
7445 | * 'ofpacts'. 'outer_action', if nonzero, specifies that 's' contains actions |
7446 | * that are nested within the action of type 'outer_action'. | |
c2d936a4 BP |
7447 | * |
7448 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
7449 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 7450 | char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7451 | ofpacts_parse_actions(const char *s, struct ofpbuf *ofpacts, |
7452 | enum ofputil_protocol *usable_protocols) | |
7453 | { | |
d824b5b7 | 7454 | return ofpacts_parse_copy(s, ofpacts, usable_protocols, false, 0); |
c2d936a4 BP |
7455 | } |
7456 | ||
7457 | /* Parses 's' as a set of OpenFlow instructions and appends the instructions to | |
7458 | * 'ofpacts'. | |
7459 | * | |
7460 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
7461 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 7462 | char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
7463 | ofpacts_parse_instructions(const char *s, struct ofpbuf *ofpacts, |
7464 | enum ofputil_protocol *usable_protocols) | |
7465 | { | |
d824b5b7 | 7466 | return ofpacts_parse_copy(s, ofpacts, usable_protocols, true, 0); |
c2d936a4 | 7467 | } |
08d1e234 BP |
7468 | |
7469 | const char * | |
7470 | ofpact_name(enum ofpact_type type) | |
7471 | { | |
7472 | switch (type) { | |
7473 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) case OFPACT_##ENUM: return NAME; | |
7474 | OFPACTS | |
7475 | #undef OFPACT | |
7476 | } | |
7477 | return "<unknown>"; | |
7478 | } | |
c2d936a4 BP |
7479 | \f |
7480 | /* Low-level action decoding and encoding functions. */ | |
7481 | ||
7482 | /* Everything needed to identify a particular OpenFlow action. */ | |
7483 | struct ofpact_hdrs { | |
7484 | uint32_t vendor; /* 0 if standard, otherwise a vendor code. */ | |
7485 | uint16_t type; /* Type if standard, otherwise subtype. */ | |
7486 | uint8_t ofp_version; /* From ofp_header. */ | |
7487 | }; | |
7488 | ||
7489 | /* Information about a particular OpenFlow action. */ | |
7490 | struct ofpact_raw_instance { | |
7491 | /* The action's identity. */ | |
7492 | struct ofpact_hdrs hdrs; | |
7493 | enum ofp_raw_action_type raw; | |
7494 | ||
7495 | /* Looking up the action. */ | |
7496 | struct hmap_node decode_node; /* Based on 'hdrs'. */ | |
7497 | struct hmap_node encode_node; /* Based on 'raw' + 'hdrs.ofp_version'. */ | |
7498 | ||
7499 | /* The action's encoded size. | |
7500 | * | |
7501 | * If this action is fixed-length, 'min_length' == 'max_length'. | |
7502 | * If it is variable length, then 'max_length' is ROUND_DOWN(UINT16_MAX, | |
7503 | * OFP_ACTION_ALIGN) == 65528. */ | |
7504 | unsigned short int min_length; | |
7505 | unsigned short int max_length; | |
7506 | ||
7507 | /* For actions with a simple integer numeric argument, 'arg_ofs' is the | |
7508 | * offset of that argument from the beginning of the action and 'arg_len' | |
7509 | * its length, both in bytes. | |
7510 | * | |
7511 | * For actions that take other forms, these are both zero. */ | |
7512 | unsigned short int arg_ofs; | |
7513 | unsigned short int arg_len; | |
7514 | ||
7515 | /* The name of the action, e.g. "OFPAT_OUTPUT" or "NXAST_RESUBMIT". */ | |
7516 | const char *name; | |
7517 | ||
7518 | /* If this action is deprecated, a human-readable string with a brief | |
7519 | * explanation. */ | |
7520 | const char *deprecation; | |
7521 | }; | |
7522 | ||
7523 | /* Action header. */ | |
7524 | struct ofp_action_header { | |
7525 | /* The meaning of other values of 'type' generally depends on the OpenFlow | |
7526 | * version (see enum ofp_raw_action_type). | |
7527 | * | |
7528 | * Across all OpenFlow versions, OFPAT_VENDOR indicates that 'vendor' | |
7529 | * designates an OpenFlow vendor ID and that the remainder of the action | |
7530 | * structure has a vendor-defined meaning. | |
7531 | */ | |
7532 | #define OFPAT_VENDOR 0xffff | |
7533 | ovs_be16 type; | |
7534 | ||
7535 | /* Always a multiple of 8. */ | |
7536 | ovs_be16 len; | |
7537 | ||
7538 | /* For type == OFPAT_VENDOR only, this is a vendor ID, e.g. NX_VENDOR_ID or | |
7539 | * ONF_VENDOR_ID. Other 'type's use this space for some other purpose. */ | |
7540 | ovs_be32 vendor; | |
7541 | }; | |
7542 | OFP_ASSERT(sizeof(struct ofp_action_header) == 8); | |
7543 | ||
232c1e12 BP |
7544 | /* Header for Nicira-defined actions and for ONF vendor extensions. |
7545 | * | |
7546 | * This cannot be used as an entirely generic vendor extension action header, | |
7547 | * because OpenFlow does not specify the location or size of the action | |
7548 | * subtype; it just happens that ONF extensions and Nicira extensions share | |
7549 | * this format. */ | |
7550 | struct ext_action_header { | |
c2d936a4 BP |
7551 | ovs_be16 type; /* OFPAT_VENDOR. */ |
7552 | ovs_be16 len; /* At least 16. */ | |
232c1e12 | 7553 | ovs_be32 vendor; /* NX_VENDOR_ID or ONF_VENDOR_ID. */ |
c2d936a4 BP |
7554 | ovs_be16 subtype; /* See enum ofp_raw_action_type. */ |
7555 | uint8_t pad[6]; | |
7556 | }; | |
232c1e12 | 7557 | OFP_ASSERT(sizeof(struct ext_action_header) == 16); |
c2d936a4 BP |
7558 | |
7559 | static bool | |
7560 | ofpact_hdrs_equal(const struct ofpact_hdrs *a, | |
7561 | const struct ofpact_hdrs *b) | |
7562 | { | |
7563 | return (a->vendor == b->vendor | |
7564 | && a->type == b->type | |
7565 | && a->ofp_version == b->ofp_version); | |
7566 | } | |
7567 | ||
7568 | static uint32_t | |
7569 | ofpact_hdrs_hash(const struct ofpact_hdrs *hdrs) | |
7570 | { | |
7571 | return hash_2words(hdrs->vendor, (hdrs->type << 16) | hdrs->ofp_version); | |
7572 | } | |
7573 | ||
7574 | #include "ofp-actions.inc2" | |
7575 | ||
7576 | static struct hmap * | |
7577 | ofpact_decode_hmap(void) | |
7578 | { | |
7579 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
7580 | static struct hmap hmap; | |
7581 | ||
7582 | if (ovsthread_once_start(&once)) { | |
7583 | struct ofpact_raw_instance *inst; | |
7584 | ||
7585 | hmap_init(&hmap); | |
7586 | for (inst = all_raw_instances; | |
7587 | inst < &all_raw_instances[ARRAY_SIZE(all_raw_instances)]; | |
7588 | inst++) { | |
7589 | hmap_insert(&hmap, &inst->decode_node, | |
7590 | ofpact_hdrs_hash(&inst->hdrs)); | |
7591 | } | |
7592 | ovsthread_once_done(&once); | |
7593 | } | |
7594 | return &hmap; | |
7595 | } | |
7596 | ||
7597 | static struct hmap * | |
7598 | ofpact_encode_hmap(void) | |
7599 | { | |
7600 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
7601 | static struct hmap hmap; | |
7602 | ||
7603 | if (ovsthread_once_start(&once)) { | |
7604 | struct ofpact_raw_instance *inst; | |
7605 | ||
7606 | hmap_init(&hmap); | |
7607 | for (inst = all_raw_instances; | |
7608 | inst < &all_raw_instances[ARRAY_SIZE(all_raw_instances)]; | |
7609 | inst++) { | |
7610 | hmap_insert(&hmap, &inst->encode_node, | |
7611 | hash_2words(inst->raw, inst->hdrs.ofp_version)); | |
7612 | } | |
7613 | ovsthread_once_done(&once); | |
7614 | } | |
7615 | return &hmap; | |
7616 | } | |
7617 | ||
7618 | static enum ofperr | |
7619 | ofpact_decode_raw(enum ofp_version ofp_version, | |
7620 | const struct ofp_action_header *oah, size_t length, | |
7621 | const struct ofpact_raw_instance **instp) | |
7622 | { | |
7623 | const struct ofpact_raw_instance *inst; | |
7624 | struct ofpact_hdrs hdrs; | |
7625 | ||
7626 | *instp = NULL; | |
7627 | if (length < sizeof *oah) { | |
7628 | return OFPERR_OFPBAC_BAD_LEN; | |
7629 | } | |
7630 | ||
7631 | /* Get base action type. */ | |
7632 | if (oah->type == htons(OFPAT_VENDOR)) { | |
7633 | /* Get vendor. */ | |
7634 | hdrs.vendor = ntohl(oah->vendor); | |
232c1e12 BP |
7635 | if (hdrs.vendor == NX_VENDOR_ID || hdrs.vendor == ONF_VENDOR_ID) { |
7636 | /* Get extension subtype. */ | |
7637 | const struct ext_action_header *nah; | |
c2d936a4 | 7638 | |
232c1e12 | 7639 | nah = ALIGNED_CAST(const struct ext_action_header *, oah); |
c2d936a4 BP |
7640 | if (length < sizeof *nah) { |
7641 | return OFPERR_OFPBAC_BAD_LEN; | |
7642 | } | |
7643 | hdrs.type = ntohs(nah->subtype); | |
7644 | } else { | |
7645 | VLOG_WARN_RL(&rl, "OpenFlow action has unknown vendor %#"PRIx32, | |
7646 | hdrs.vendor); | |
7647 | return OFPERR_OFPBAC_BAD_VENDOR; | |
7648 | } | |
7649 | } else { | |
7650 | hdrs.vendor = 0; | |
7651 | hdrs.type = ntohs(oah->type); | |
7652 | } | |
7653 | ||
7654 | hdrs.ofp_version = ofp_version; | |
7655 | HMAP_FOR_EACH_WITH_HASH (inst, decode_node, ofpact_hdrs_hash(&hdrs), | |
7656 | ofpact_decode_hmap()) { | |
7657 | if (ofpact_hdrs_equal(&hdrs, &inst->hdrs)) { | |
7658 | *instp = inst; | |
7659 | return 0; | |
7660 | } | |
7661 | } | |
7662 | ||
7663 | return (hdrs.vendor | |
7664 | ? OFPERR_OFPBAC_BAD_VENDOR_TYPE | |
7665 | : OFPERR_OFPBAC_BAD_TYPE); | |
7666 | } | |
7667 | ||
7668 | static enum ofperr | |
7669 | ofpact_pull_raw(struct ofpbuf *buf, enum ofp_version ofp_version, | |
7670 | enum ofp_raw_action_type *raw, uint64_t *arg) | |
7671 | { | |
6fd6ed71 | 7672 | const struct ofp_action_header *oah = buf->data; |
c2d936a4 BP |
7673 | const struct ofpact_raw_instance *action; |
7674 | unsigned int length; | |
7675 | enum ofperr error; | |
7676 | ||
7677 | *raw = *arg = 0; | |
6fd6ed71 | 7678 | error = ofpact_decode_raw(ofp_version, oah, buf->size, &action); |
c2d936a4 BP |
7679 | if (error) { |
7680 | return error; | |
7681 | } | |
7682 | ||
7683 | if (action->deprecation) { | |
7684 | VLOG_INFO_RL(&rl, "%s is deprecated in %s (%s)", | |
7685 | action->name, ofputil_version_to_string(ofp_version), | |
7686 | action->deprecation); | |
7687 | } | |
7688 | ||
7689 | length = ntohs(oah->len); | |
6fd6ed71 | 7690 | if (length > buf->size) { |
b153b990 | 7691 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u exceeds action buffer " |
6fd6ed71 | 7692 | "length %"PRIu32, action->name, length, buf->size); |
b153b990 BP |
7693 | return OFPERR_OFPBAC_BAD_LEN; |
7694 | } | |
c2d936a4 BP |
7695 | if (length < action->min_length || length > action->max_length) { |
7696 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u not in valid range " | |
7697 | "[%hu,%hu]", action->name, length, | |
7698 | action->min_length, action->max_length); | |
7699 | return OFPERR_OFPBAC_BAD_LEN; | |
7700 | } | |
7701 | if (length % 8) { | |
7702 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u is not a multiple " | |
7703 | "of 8", action->name, length); | |
7704 | return OFPERR_OFPBAC_BAD_LEN; | |
7705 | } | |
7706 | ||
7707 | *raw = action->raw; | |
7708 | *arg = 0; | |
7709 | if (action->arg_len) { | |
7710 | const uint8_t *p; | |
7711 | int i; | |
7712 | ||
7713 | p = ofpbuf_at_assert(buf, action->arg_ofs, action->arg_len); | |
7714 | for (i = 0; i < action->arg_len; i++) { | |
7715 | *arg = (*arg << 8) | p[i]; | |
7716 | } | |
7717 | } | |
7718 | ||
7719 | ofpbuf_pull(buf, length); | |
7720 | ||
7721 | return 0; | |
7722 | } | |
7723 | ||
7724 | static const struct ofpact_raw_instance * | |
7725 | ofpact_raw_lookup(enum ofp_version ofp_version, enum ofp_raw_action_type raw) | |
7726 | { | |
7727 | const struct ofpact_raw_instance *inst; | |
7728 | ||
7729 | HMAP_FOR_EACH_WITH_HASH (inst, encode_node, hash_2words(raw, ofp_version), | |
7730 | ofpact_encode_hmap()) { | |
7731 | if (inst->raw == raw && inst->hdrs.ofp_version == ofp_version) { | |
7732 | return inst; | |
7733 | } | |
7734 | } | |
7735 | OVS_NOT_REACHED(); | |
7736 | } | |
7737 | ||
7738 | static void * | |
7739 | ofpact_put_raw(struct ofpbuf *buf, enum ofp_version ofp_version, | |
7740 | enum ofp_raw_action_type raw, uint64_t arg) | |
7741 | { | |
7742 | const struct ofpact_raw_instance *inst; | |
7743 | struct ofp_action_header *oah; | |
7744 | const struct ofpact_hdrs *hdrs; | |
7745 | ||
7746 | inst = ofpact_raw_lookup(ofp_version, raw); | |
7747 | hdrs = &inst->hdrs; | |
7748 | ||
7749 | oah = ofpbuf_put_zeros(buf, inst->min_length); | |
7750 | oah->type = htons(hdrs->vendor ? OFPAT_VENDOR : hdrs->type); | |
7751 | oah->len = htons(inst->min_length); | |
7752 | oah->vendor = htonl(hdrs->vendor); | |
7753 | ||
7754 | switch (hdrs->vendor) { | |
7755 | case 0: | |
7756 | break; | |
7757 | ||
232c1e12 BP |
7758 | case NX_VENDOR_ID: |
7759 | case ONF_VENDOR_ID: { | |
7760 | struct ext_action_header *nah = (struct ext_action_header *) oah; | |
c2d936a4 BP |
7761 | nah->subtype = htons(hdrs->type); |
7762 | break; | |
7763 | } | |
7764 | ||
7765 | default: | |
7766 | OVS_NOT_REACHED(); | |
7767 | } | |
7768 | ||
7769 | if (inst->arg_len) { | |
7770 | uint8_t *p = (uint8_t *) oah + inst->arg_ofs + inst->arg_len; | |
7771 | int i; | |
7772 | ||
7773 | for (i = 0; i < inst->arg_len; i++) { | |
7774 | *--p = arg; | |
7775 | arg >>= 8; | |
7776 | } | |
7777 | } else { | |
7778 | ovs_assert(!arg); | |
7779 | } | |
7780 | ||
7781 | return oah; | |
7782 | } | |
178742f9 BP |
7783 | |
7784 | static void | |
7785 | pad_ofpat(struct ofpbuf *openflow, size_t start_ofs) | |
7786 | { | |
7787 | struct ofp_action_header *oah; | |
7788 | ||
9ac0aada JR |
7789 | ofpbuf_put_zeros(openflow, PAD_SIZE(openflow->size - start_ofs, |
7790 | OFP_ACTION_ALIGN)); | |
178742f9 BP |
7791 | |
7792 | oah = ofpbuf_at_assert(openflow, start_ofs, sizeof *oah); | |
6fd6ed71 | 7793 | oah->len = htons(openflow->size - start_ofs); |
178742f9 BP |
7794 | } |
7795 |