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