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