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