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f25d0cf3 | 1 | /* |
d3cb080e | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc. |
f25d0cf3 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | #include "ofp-actions.h" | |
f25d0cf3 BP |
19 | #include "bundle.h" |
20 | #include "byte-order.h" | |
21 | #include "compiler.h" | |
d4abaff5 | 22 | #include "dummy.h" |
f25d0cf3 | 23 | #include "dynamic-string.h" |
c2d936a4 | 24 | #include "hmap.h" |
f25d0cf3 BP |
25 | #include "learn.h" |
26 | #include "meta-flow.h" | |
27 | #include "multipath.h" | |
28 | #include "nx-match.h" | |
c2d936a4 | 29 | #include "ofp-parse.h" |
f25d0cf3 BP |
30 | #include "ofp-util.h" |
31 | #include "ofpbuf.h" | |
c2d936a4 | 32 | #include "unaligned.h" |
cb22974d | 33 | #include "util.h" |
e6211adc | 34 | #include "openvswitch/vlog.h" |
f25d0cf3 BP |
35 | |
36 | VLOG_DEFINE_THIS_MODULE(ofp_actions); | |
37 | ||
38 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
f25d0cf3 | 39 | |
c2d936a4 BP |
40 | struct ofp_action_header; |
41 | ||
42 | /* Raw identifiers for OpenFlow actions. | |
43 | * | |
44 | * Decoding and encoding OpenFlow actions across multiple versions is difficult | |
45 | * to do in a clean, consistent way. This enumeration lays out all of the | |
46 | * forms of actions that Open vSwitch supports. | |
47 | * | |
48 | * The comments here must follow a stylized form because the | |
49 | * "extract-ofp-actions" program parses them at build time to generate data | |
50 | * tables. | |
51 | * | |
52 | * - The first part of each comment specifies the vendor, OpenFlow versions, | |
53 | * and type for each protocol that supports the action: | |
54 | * | |
55 | * # The vendor is OF for standard OpenFlow actions, NX for Nicira | |
56 | * extension actions. (Support for other vendors can be added, but | |
57 | * it can't be done just based on a vendor ID definition alone | |
58 | * because OpenFlow doesn't define a standard way to specify a | |
59 | * subtype for vendor actions, so other vendors might do it different | |
60 | * from Nicira.) | |
61 | * | |
62 | * # The version can specify a specific OpenFlow version, a version | |
63 | * range delimited by "-", or an open-ended range with "+". | |
64 | * | |
65 | * # The type, in parentheses, is the action type number (for standard | |
66 | * OpenFlow actions) or subtype (for vendor extension actions). | |
67 | * | |
68 | * # Optionally one may add "is deprecated" followed by a | |
69 | * human-readable reason in parentheses (which will be used in log | |
70 | * messages), if a particular action should no longer be used. | |
71 | * | |
72 | * Multiple such specifications may be separated by commas. | |
73 | * | |
74 | * - The second part describes the action's wire format. It may be: | |
75 | * | |
76 | * # "struct <name>": The struct fully specifies the wire format. The | |
77 | * action is exactly the size of the struct. (Thus, the struct must | |
78 | * be an exact multiple of 8 bytes in size.) | |
79 | * | |
80 | * # "struct <name>, ...": The struct specifies the beginning of the | |
81 | * wire format. An instance of the action is either the struct's | |
82 | * exact size, or a multiple of 8 bytes longer. | |
83 | * | |
84 | * # "uint<N>_t" or "ovs_be<N>": The action consists of a (standard or | |
85 | * vendor extension) header, followed by 0 or more pad bytes to align | |
86 | * to a multiple of <N> bits, followed by an argument of the given | |
87 | * type, followed by 0 or more pad bytes to bring the total action up | |
88 | * to a multiple of 8 bytes. | |
89 | * | |
90 | * # "void": The action is just a (standard or vendor extension) | |
91 | * header. | |
92 | * | |
93 | * - Optional additional text enclosed in square brackets is commentary for | |
94 | * the human reader. | |
95 | */ | |
96 | enum ofp_raw_action_type { | |
97 | /* ## ----------------- ## */ | |
98 | /* ## Standard actions. ## */ | |
99 | /* ## ----------------- ## */ | |
100 | ||
101 | /* OF1.0(0): struct ofp10_action_output. */ | |
102 | OFPAT_RAW10_OUTPUT, | |
103 | /* OF1.1+(0): struct ofp11_action_output. */ | |
104 | OFPAT_RAW11_OUTPUT, | |
105 | ||
106 | /* OF1.0(1): uint16_t. */ | |
107 | OFPAT_RAW10_SET_VLAN_VID, | |
108 | /* OF1.0(2): uint8_t. */ | |
109 | OFPAT_RAW10_SET_VLAN_PCP, | |
110 | ||
111 | /* OF1.1(1), OF1.2+(1) is deprecated (use Set-Field): uint16_t. | |
112 | * | |
113 | * [Semantics differ slightly between the 1.0 and 1.1 versions of the VLAN | |
114 | * modification actions: the 1.0 versions push a VLAN header if none is | |
115 | * present, but the 1.1 versions do not. That is the only reason that we | |
116 | * distinguish their raw action types.] */ | |
117 | OFPAT_RAW11_SET_VLAN_VID, | |
118 | /* OF1.1(2), OF1.2+(2) is deprecated (use Set-Field): uint8_t. */ | |
119 | OFPAT_RAW11_SET_VLAN_PCP, | |
120 | ||
121 | /* OF1.1+(17): ovs_be16. | |
122 | * | |
123 | * [The argument is the Ethertype, e.g. ETH_TYPE_VLAN_8021Q, not the VID or | |
124 | * TCI.] */ | |
125 | OFPAT_RAW11_PUSH_VLAN, | |
126 | ||
127 | /* OF1.0(3): void. */ | |
128 | OFPAT_RAW10_STRIP_VLAN, | |
129 | /* OF1.1+(18): void. */ | |
130 | OFPAT_RAW11_POP_VLAN, | |
131 | ||
132 | /* OF1.0(4), OF1.1(3), OF1.2+(3) is deprecated (use Set-Field): struct | |
133 | * ofp_action_dl_addr. */ | |
134 | OFPAT_RAW_SET_DL_SRC, | |
135 | ||
136 | /* OF1.0(5), OF1.1(4), OF1.2+(4) is deprecated (use Set-Field): struct | |
137 | * ofp_action_dl_addr. */ | |
138 | OFPAT_RAW_SET_DL_DST, | |
139 | ||
140 | /* OF1.0(6), OF1.1(5), OF1.2+(5) is deprecated (use Set-Field): | |
141 | * ovs_be32. */ | |
142 | OFPAT_RAW_SET_NW_SRC, | |
143 | ||
144 | /* OF1.0(7), OF1.1(6), OF1.2+(6) is deprecated (use Set-Field): | |
145 | * ovs_be32. */ | |
146 | OFPAT_RAW_SET_NW_DST, | |
147 | ||
148 | /* OF1.0(8), OF1.1(7), OF1.2+(7) is deprecated (use Set-Field): uint8_t. */ | |
149 | OFPAT_RAW_SET_NW_TOS, | |
150 | ||
151 | /* OF1.1(8), OF1.2+(8) is deprecated (use Set-Field): uint8_t. */ | |
152 | OFPAT_RAW11_SET_NW_ECN, | |
153 | ||
154 | /* OF1.0(9), OF1.1(9), OF1.2+(9) is deprecated (use Set-Field): | |
155 | * ovs_be16. */ | |
156 | OFPAT_RAW_SET_TP_SRC, | |
157 | ||
158 | /* OF1.0(10), OF1.1(10), OF1.2+(10) is deprecated (use Set-Field): | |
159 | * ovs_be16. */ | |
160 | OFPAT_RAW_SET_TP_DST, | |
161 | ||
162 | /* OF1.0(11): struct ofp10_action_enqueue. */ | |
163 | OFPAT_RAW10_ENQUEUE, | |
164 | ||
165 | /* NX1.0(30), OF1.1(13), OF1.2+(13) is deprecated (use Set-Field): | |
166 | * ovs_be32. */ | |
167 | OFPAT_RAW_SET_MPLS_LABEL, | |
168 | ||
169 | /* NX1.0(31), OF1.1(14), OF1.2+(14) is deprecated (use Set-Field): | |
170 | * uint8_t. */ | |
171 | OFPAT_RAW_SET_MPLS_TC, | |
172 | ||
173 | /* NX1.0(25), OF1.1(15), OF1.2+(15) is deprecated (use Set-Field): | |
174 | * uint8_t. */ | |
175 | OFPAT_RAW_SET_MPLS_TTL, | |
176 | ||
177 | /* NX1.0(26), OF1.1+(16): void. */ | |
178 | OFPAT_RAW_DEC_MPLS_TTL, | |
179 | ||
180 | /* NX1.0(23), OF1.1+(19): ovs_be16. | |
181 | * | |
182 | * [The argument is the Ethertype, e.g. ETH_TYPE_MPLS, not the label.] */ | |
183 | OFPAT_RAW_PUSH_MPLS, | |
184 | ||
185 | /* NX1.0(24), OF1.1+(20): ovs_be16. | |
186 | * | |
187 | * [The argument is the Ethertype, e.g. ETH_TYPE_IPV4 if at BoS or | |
188 | * ETH_TYPE_MPLS otherwise, not the label.] */ | |
189 | OFPAT_RAW_POP_MPLS, | |
190 | ||
191 | /* NX1.0(4), OF1.1+(21): uint32_t. */ | |
192 | OFPAT_RAW_SET_QUEUE, | |
193 | ||
194 | /* OF1.1+(22): uint32_t. */ | |
195 | OFPAT_RAW11_GROUP, | |
196 | ||
197 | /* OF1.1+(23): uint8_t. */ | |
198 | OFPAT_RAW11_SET_NW_TTL, | |
199 | ||
200 | /* NX1.0(18), OF1.1+(24): void. */ | |
201 | OFPAT_RAW_DEC_NW_TTL, | |
202 | /* NX1.0+(21): struct nx_action_cnt_ids, ... */ | |
203 | NXAST_RAW_DEC_TTL_CNT_IDS, | |
204 | ||
7eb4b1f1 | 205 | /* OF1.2-1.4(25): struct ofp12_action_set_field, ... */ |
c2d936a4 | 206 | OFPAT_RAW12_SET_FIELD, |
7eb4b1f1 BP |
207 | /* OF1.5+(25): struct ofp12_action_set_field, ... */ |
208 | OFPAT_RAW15_SET_FIELD, | |
209 | /* NX1.0-1.4(7): struct nx_action_reg_load. | |
210 | * | |
211 | * [In OpenFlow 1.5, set_field is a superset of reg_load functionality, so | |
212 | * we drop reg_load.] */ | |
c2d936a4 | 213 | NXAST_RAW_REG_LOAD, |
bad8a439 BP |
214 | /* NX1.0-1.4(33): struct nx_action_reg_load2, ... |
215 | * | |
216 | * [In OpenFlow 1.5, set_field is a superset of reg_load2 functionality, so | |
217 | * we drop reg_load2.] */ | |
218 | NXAST_RAW_REG_LOAD2, | |
c2d936a4 | 219 | |
f13cdd73 | 220 | /* OF1.5+(28): struct ofp15_action_copy_field, ... */ |
73178f20 | 221 | OFPAT_RAW15_COPY_FIELD, |
914624f8 BP |
222 | /* ONF1.3-1.4(3200): struct onf_action_copy_field, ... */ |
223 | ONFACT_RAW13_COPY_FIELD, | |
bad8a439 | 224 | /* NX1.0-1.4(6): struct nx_action_reg_move, ... */ |
73178f20 BP |
225 | NXAST_RAW_REG_MOVE, |
226 | ||
c2d936a4 BP |
227 | /* ## ------------------------- ## */ |
228 | /* ## Nicira extension actions. ## */ | |
229 | /* ## ------------------------- ## */ | |
230 | ||
231 | /* Actions similar to standard actions are listed with the standard actions. */ | |
232 | ||
233 | /* NX1.0+(1): uint16_t. */ | |
234 | NXAST_RAW_RESUBMIT, | |
235 | /* NX1.0+(14): struct nx_action_resubmit. */ | |
236 | NXAST_RAW_RESUBMIT_TABLE, | |
237 | ||
238 | /* NX1.0+(2): uint32_t. */ | |
239 | NXAST_RAW_SET_TUNNEL, | |
240 | /* NX1.0+(9): uint64_t. */ | |
241 | NXAST_RAW_SET_TUNNEL64, | |
242 | ||
243 | /* NX1.0+(5): void. */ | |
244 | NXAST_RAW_POP_QUEUE, | |
245 | ||
c2d936a4 BP |
246 | /* NX1.0+(8): struct nx_action_note, ... */ |
247 | NXAST_RAW_NOTE, | |
248 | ||
249 | /* NX1.0+(10): struct nx_action_multipath. */ | |
250 | NXAST_RAW_MULTIPATH, | |
251 | ||
252 | /* NX1.0+(12): struct nx_action_bundle, ... */ | |
253 | NXAST_RAW_BUNDLE, | |
254 | /* NX1.0+(13): struct nx_action_bundle, ... */ | |
255 | NXAST_RAW_BUNDLE_LOAD, | |
256 | ||
257 | /* NX1.0+(15): struct nx_action_output_reg. */ | |
258 | NXAST_RAW_OUTPUT_REG, | |
bad8a439 BP |
259 | /* NX1.0+(32): struct nx_action_output_reg2. */ |
260 | NXAST_RAW_OUTPUT_REG2, | |
c2d936a4 BP |
261 | |
262 | /* NX1.0+(16): struct nx_action_learn, ... */ | |
263 | NXAST_RAW_LEARN, | |
264 | ||
265 | /* NX1.0+(17): void. */ | |
266 | NXAST_RAW_EXIT, | |
267 | ||
268 | /* NX1.0+(19): struct nx_action_fin_timeout. */ | |
269 | NXAST_RAW_FIN_TIMEOUT, | |
270 | ||
271 | /* NX1.0+(20): struct nx_action_controller. */ | |
272 | NXAST_RAW_CONTROLLER, | |
273 | ||
274 | /* NX1.0+(22): struct nx_action_write_metadata. */ | |
275 | NXAST_RAW_WRITE_METADATA, | |
276 | ||
277 | /* NX1.0+(27): struct nx_action_stack. */ | |
278 | NXAST_RAW_STACK_PUSH, | |
279 | ||
280 | /* NX1.0+(28): struct nx_action_stack. */ | |
281 | NXAST_RAW_STACK_POP, | |
282 | ||
283 | /* NX1.0+(29): struct nx_action_sample. */ | |
284 | NXAST_RAW_SAMPLE, | |
18080541 BP |
285 | |
286 | /* NX1.0+(34): struct nx_action_conjunction. */ | |
287 | NXAST_RAW_CONJUNCTION, | |
d4abaff5 BP |
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, | |
c2d936a4 BP |
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); | |
178742f9 | 332 | static void pad_ofpat(struct ofpbuf *openflow, size_t start_ofs); |
c2d936a4 BP |
333 | |
334 | static enum ofperr ofpacts_verify(const struct ofpact[], size_t ofpacts_len, | |
335 | uint32_t allowed_ovsinsts); | |
336 | ||
337 | static void ofpact_put_set_field(struct ofpbuf *openflow, enum ofp_version, | |
338 | enum mf_field_id, uint64_t value); | |
339 | ||
340 | static enum ofperr ofpact_pull_raw(struct ofpbuf *, enum ofp_version, | |
341 | enum ofp_raw_action_type *, uint64_t *arg); | |
342 | static void *ofpact_put_raw(struct ofpbuf *, enum ofp_version, | |
343 | enum ofp_raw_action_type, uint64_t arg); | |
344 | ||
cab50449 | 345 | static char *OVS_WARN_UNUSED_RESULT ofpacts_parse( |
c2d936a4 BP |
346 | char *str, struct ofpbuf *ofpacts, enum ofputil_protocol *usable_protocols, |
347 | bool allow_instructions); | |
348 | ||
349 | #include "ofp-actions.inc1" | |
350 | \f | |
351 | /* Output actions. */ | |
352 | ||
353 | /* Action structure for OFPAT10_OUTPUT, which sends packets out 'port'. | |
354 | * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max | |
355 | * number of bytes to send. A 'max_len' of zero means no bytes of the | |
356 | * packet should be sent. */ | |
357 | struct ofp10_action_output { | |
358 | ovs_be16 type; /* OFPAT10_OUTPUT. */ | |
359 | ovs_be16 len; /* Length is 8. */ | |
360 | ovs_be16 port; /* Output port. */ | |
361 | ovs_be16 max_len; /* Max length to send to controller. */ | |
e45e72f1 | 362 | }; |
c2d936a4 BP |
363 | OFP_ASSERT(sizeof(struct ofp10_action_output) == 8); |
364 | ||
365 | /* Action structure for OFPAT_OUTPUT, which sends packets out 'port'. | |
366 | * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max | |
367 | * number of bytes to send. A 'max_len' of zero means no bytes of the | |
368 | * packet should be sent.*/ | |
369 | struct ofp11_action_output { | |
370 | ovs_be16 type; /* OFPAT11_OUTPUT. */ | |
371 | ovs_be16 len; /* Length is 16. */ | |
372 | ovs_be32 port; /* Output port. */ | |
373 | ovs_be16 max_len; /* Max length to send to controller. */ | |
374 | uint8_t pad[6]; /* Pad to 64 bits. */ | |
375 | }; | |
376 | OFP_ASSERT(sizeof(struct ofp11_action_output) == 16); | |
e45e72f1 | 377 | |
f25d0cf3 | 378 | static enum ofperr |
c2d936a4 BP |
379 | decode_OFPAT_RAW10_OUTPUT(const struct ofp10_action_output *oao, |
380 | struct ofpbuf *out) | |
f25d0cf3 BP |
381 | { |
382 | struct ofpact_output *output; | |
383 | ||
384 | output = ofpact_put_OUTPUT(out); | |
4e022ec0 | 385 | output->port = u16_to_ofp(ntohs(oao->port)); |
f25d0cf3 BP |
386 | output->max_len = ntohs(oao->max_len); |
387 | ||
57ad4e9e | 388 | return ofpact_check_output_port(output->port, OFPP_MAX); |
f25d0cf3 BP |
389 | } |
390 | ||
391 | static enum ofperr | |
c2d936a4 BP |
392 | decode_OFPAT_RAW11_OUTPUT(const struct ofp11_action_output *oao, |
393 | struct ofpbuf *out) | |
f25d0cf3 | 394 | { |
c2d936a4 BP |
395 | struct ofpact_output *output; |
396 | enum ofperr error; | |
f25d0cf3 | 397 | |
c2d936a4 BP |
398 | output = ofpact_put_OUTPUT(out); |
399 | output->max_len = ntohs(oao->max_len); | |
400 | ||
401 | error = ofputil_port_from_ofp11(oao->port, &output->port); | |
402 | if (error) { | |
403 | return error; | |
f25d0cf3 | 404 | } |
c2d936a4 BP |
405 | |
406 | return ofpact_check_output_port(output->port, OFPP_MAX); | |
f25d0cf3 BP |
407 | } |
408 | ||
409 | static void | |
c2d936a4 BP |
410 | encode_OUTPUT(const struct ofpact_output *output, |
411 | enum ofp_version ofp_version, struct ofpbuf *out) | |
f25d0cf3 | 412 | { |
c2d936a4 BP |
413 | if (ofp_version == OFP10_VERSION) { |
414 | struct ofp10_action_output *oao; | |
f25d0cf3 | 415 | |
c2d936a4 BP |
416 | oao = put_OFPAT10_OUTPUT(out); |
417 | oao->port = htons(ofp_to_u16(output->port)); | |
418 | oao->max_len = htons(output->max_len); | |
419 | } else { | |
420 | struct ofp11_action_output *oao; | |
421 | ||
422 | oao = put_OFPAT11_OUTPUT(out); | |
423 | oao->port = ofputil_port_to_ofp11(output->port); | |
424 | oao->max_len = htons(output->max_len); | |
425 | } | |
f25d0cf3 BP |
426 | } |
427 | ||
cab50449 | 428 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
429 | parse_OUTPUT(const char *arg, struct ofpbuf *ofpacts, |
430 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
f25d0cf3 | 431 | { |
c2d936a4 BP |
432 | if (strchr(arg, '[')) { |
433 | struct ofpact_output_reg *output_reg; | |
f25d0cf3 | 434 | |
c2d936a4 BP |
435 | output_reg = ofpact_put_OUTPUT_REG(ofpacts); |
436 | output_reg->max_len = UINT16_MAX; | |
437 | return mf_parse_subfield(&output_reg->src, arg); | |
438 | } else { | |
439 | struct ofpact_output *output; | |
440 | ||
441 | output = ofpact_put_OUTPUT(ofpacts); | |
442 | if (!ofputil_port_from_string(arg, &output->port)) { | |
443 | return xasprintf("%s: output to unknown port", arg); | |
444 | } | |
445 | output->max_len = output->port == OFPP_CONTROLLER ? UINT16_MAX : 0; | |
446 | return NULL; | |
f25d0cf3 | 447 | } |
c2d936a4 | 448 | } |
f25d0cf3 | 449 | |
c2d936a4 BP |
450 | static void |
451 | format_OUTPUT(const struct ofpact_output *a, struct ds *s) | |
452 | { | |
453 | if (ofp_to_u16(a->port) < ofp_to_u16(OFPP_MAX)) { | |
454 | ds_put_format(s, "output:%"PRIu16, a->port); | |
455 | } else { | |
456 | ofputil_format_port(a->port, s); | |
457 | if (a->port == OFPP_CONTROLLER) { | |
458 | ds_put_format(s, ":%"PRIu16, a->max_len); | |
459 | } | |
460 | } | |
f25d0cf3 | 461 | } |
c2d936a4 BP |
462 | \f |
463 | /* Group actions. */ | |
f25d0cf3 BP |
464 | |
465 | static enum ofperr | |
c2d936a4 | 466 | decode_OFPAT_RAW11_GROUP(uint32_t group_id, struct ofpbuf *out) |
f25d0cf3 | 467 | { |
c2d936a4 BP |
468 | ofpact_put_GROUP(out)->group_id = group_id; |
469 | return 0; | |
470 | } | |
f25d0cf3 | 471 | |
c2d936a4 BP |
472 | static void |
473 | encode_GROUP(const struct ofpact_group *group, | |
474 | enum ofp_version ofp_version, struct ofpbuf *out) | |
475 | { | |
476 | if (ofp_version == OFP10_VERSION) { | |
477 | /* XXX */ | |
478 | } else { | |
479 | put_OFPAT11_GROUP(out, group->group_id); | |
f25d0cf3 | 480 | } |
c2d936a4 | 481 | } |
f25d0cf3 | 482 | |
cab50449 | 483 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
484 | parse_GROUP(char *arg, struct ofpbuf *ofpacts, |
485 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
486 | { | |
487 | return str_to_u32(arg, &ofpact_put_GROUP(ofpacts)->group_id); | |
f25d0cf3 BP |
488 | } |
489 | ||
490 | static void | |
c2d936a4 | 491 | format_GROUP(const struct ofpact_group *a, struct ds *s) |
f25d0cf3 | 492 | { |
c2d936a4 | 493 | ds_put_format(s, "group:%"PRIu32, a->group_id); |
f25d0cf3 | 494 | } |
c2d936a4 BP |
495 | \f |
496 | /* Action structure for NXAST_CONTROLLER. | |
497 | * | |
498 | * This generalizes using OFPAT_OUTPUT to send a packet to OFPP_CONTROLLER. In | |
499 | * addition to the 'max_len' that OFPAT_OUTPUT supports, it also allows | |
500 | * specifying: | |
501 | * | |
502 | * - 'reason': The reason code to use in the ofp_packet_in or nx_packet_in. | |
503 | * | |
504 | * - 'controller_id': The ID of the controller connection to which the | |
505 | * ofp_packet_in should be sent. The ofp_packet_in or nx_packet_in is | |
506 | * sent only to controllers that have the specified controller connection | |
507 | * ID. See "struct nx_controller_id" for more information. */ | |
508 | struct nx_action_controller { | |
509 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
510 | ovs_be16 len; /* Length is 16. */ | |
511 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
512 | ovs_be16 subtype; /* NXAST_CONTROLLER. */ | |
513 | ovs_be16 max_len; /* Maximum length to send to controller. */ | |
514 | ovs_be16 controller_id; /* Controller ID to send packet-in. */ | |
515 | uint8_t reason; /* enum ofp_packet_in_reason (OFPR_*). */ | |
516 | uint8_t zero; /* Must be zero. */ | |
517 | }; | |
518 | OFP_ASSERT(sizeof(struct nx_action_controller) == 16); | |
f25d0cf3 | 519 | |
c2d936a4 BP |
520 | static enum ofperr |
521 | decode_NXAST_RAW_CONTROLLER(const struct nx_action_controller *nac, | |
522 | struct ofpbuf *out) | |
f25d0cf3 BP |
523 | { |
524 | struct ofpact_controller *oc; | |
525 | ||
526 | oc = ofpact_put_CONTROLLER(out); | |
527 | oc->max_len = ntohs(nac->max_len); | |
528 | oc->controller_id = ntohs(nac->controller_id); | |
529 | oc->reason = nac->reason; | |
c2d936a4 | 530 | return 0; |
f25d0cf3 BP |
531 | } |
532 | ||
c2d936a4 BP |
533 | static void |
534 | encode_CONTROLLER(const struct ofpact_controller *controller, | |
535 | enum ofp_version ofp_version OVS_UNUSED, | |
536 | struct ofpbuf *out) | |
4cceacb9 | 537 | { |
c2d936a4 | 538 | struct nx_action_controller *nac; |
4cceacb9 | 539 | |
c2d936a4 BP |
540 | nac = put_NXAST_CONTROLLER(out); |
541 | nac->max_len = htons(controller->max_len); | |
542 | nac->controller_id = htons(controller->controller_id); | |
543 | nac->reason = controller->reason; | |
544 | } | |
545 | ||
cab50449 | 546 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
547 | parse_CONTROLLER(char *arg, struct ofpbuf *ofpacts, |
548 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
549 | { | |
550 | enum ofp_packet_in_reason reason = OFPR_ACTION; | |
551 | uint16_t controller_id = 0; | |
552 | uint16_t max_len = UINT16_MAX; | |
553 | ||
554 | if (!arg[0]) { | |
555 | /* Use defaults. */ | |
556 | } else if (strspn(arg, "0123456789") == strlen(arg)) { | |
557 | char *error = str_to_u16(arg, "max_len", &max_len); | |
558 | if (error) { | |
559 | return error; | |
560 | } | |
561 | } else { | |
562 | char *name, *value; | |
563 | ||
564 | while (ofputil_parse_key_value(&arg, &name, &value)) { | |
565 | if (!strcmp(name, "reason")) { | |
566 | if (!ofputil_packet_in_reason_from_string(value, &reason)) { | |
567 | return xasprintf("unknown reason \"%s\"", value); | |
568 | } | |
569 | } else if (!strcmp(name, "max_len")) { | |
570 | char *error = str_to_u16(value, "max_len", &max_len); | |
571 | if (error) { | |
572 | return error; | |
573 | } | |
574 | } else if (!strcmp(name, "id")) { | |
575 | char *error = str_to_u16(value, "id", &controller_id); | |
576 | if (error) { | |
577 | return error; | |
578 | } | |
579 | } else { | |
580 | return xasprintf("unknown key \"%s\" parsing controller " | |
581 | "action", name); | |
582 | } | |
583 | } | |
4cceacb9 JS |
584 | } |
585 | ||
c2d936a4 BP |
586 | if (reason == OFPR_ACTION && controller_id == 0) { |
587 | struct ofpact_output *output; | |
4cceacb9 | 588 | |
c2d936a4 BP |
589 | output = ofpact_put_OUTPUT(ofpacts); |
590 | output->port = OFPP_CONTROLLER; | |
591 | output->max_len = max_len; | |
592 | } else { | |
593 | struct ofpact_controller *controller; | |
594 | ||
595 | controller = ofpact_put_CONTROLLER(ofpacts); | |
596 | controller->max_len = max_len; | |
597 | controller->reason = reason; | |
598 | controller->controller_id = controller_id; | |
599 | } | |
600 | ||
601 | return NULL; | |
4cceacb9 JS |
602 | } |
603 | ||
f25d0cf3 | 604 | static void |
c2d936a4 | 605 | format_CONTROLLER(const struct ofpact_controller *a, struct ds *s) |
f25d0cf3 | 606 | { |
c2d936a4 BP |
607 | if (a->reason == OFPR_ACTION && a->controller_id == 0) { |
608 | ds_put_format(s, "CONTROLLER:%"PRIu16, a->max_len); | |
609 | } else { | |
610 | enum ofp_packet_in_reason reason = a->reason; | |
f25d0cf3 | 611 | |
c2d936a4 BP |
612 | ds_put_cstr(s, "controller("); |
613 | if (reason != OFPR_ACTION) { | |
614 | char reasonbuf[OFPUTIL_PACKET_IN_REASON_BUFSIZE]; | |
615 | ||
616 | ds_put_format(s, "reason=%s,", | |
617 | ofputil_packet_in_reason_to_string( | |
618 | reason, reasonbuf, sizeof reasonbuf)); | |
619 | } | |
620 | if (a->max_len != UINT16_MAX) { | |
621 | ds_put_format(s, "max_len=%"PRIu16",", a->max_len); | |
622 | } | |
623 | if (a->controller_id != 0) { | |
624 | ds_put_format(s, "id=%"PRIu16",", a->controller_id); | |
625 | } | |
626 | ds_chomp(s, ','); | |
627 | ds_put_char(s, ')'); | |
628 | } | |
f25d0cf3 | 629 | } |
c2d936a4 BP |
630 | \f |
631 | /* Enqueue action. */ | |
632 | struct ofp10_action_enqueue { | |
633 | ovs_be16 type; /* OFPAT10_ENQUEUE. */ | |
634 | ovs_be16 len; /* Len is 16. */ | |
635 | ovs_be16 port; /* Port that queue belongs. Should | |
636 | refer to a valid physical port | |
637 | (i.e. < OFPP_MAX) or OFPP_IN_PORT. */ | |
638 | uint8_t pad[6]; /* Pad for 64-bit alignment. */ | |
639 | ovs_be32 queue_id; /* Where to enqueue the packets. */ | |
640 | }; | |
641 | OFP_ASSERT(sizeof(struct ofp10_action_enqueue) == 16); | |
f25d0cf3 | 642 | |
c2d967a5 | 643 | static enum ofperr |
c2d936a4 BP |
644 | decode_OFPAT_RAW10_ENQUEUE(const struct ofp10_action_enqueue *oae, |
645 | struct ofpbuf *out) | |
c2d967a5 | 646 | { |
c2d936a4 | 647 | struct ofpact_enqueue *enqueue; |
c2d967a5 | 648 | |
c2d936a4 BP |
649 | enqueue = ofpact_put_ENQUEUE(out); |
650 | enqueue->port = u16_to_ofp(ntohs(oae->port)); | |
651 | enqueue->queue = ntohl(oae->queue_id); | |
652 | if (ofp_to_u16(enqueue->port) >= ofp_to_u16(OFPP_MAX) | |
653 | && enqueue->port != OFPP_IN_PORT | |
654 | && enqueue->port != OFPP_LOCAL) { | |
655 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
656 | } | |
657 | return 0; | |
c2d967a5 MM |
658 | } |
659 | ||
c2d936a4 BP |
660 | static void |
661 | encode_ENQUEUE(const struct ofpact_enqueue *enqueue, | |
662 | enum ofp_version ofp_version, struct ofpbuf *out) | |
c2d967a5 | 663 | { |
c2d936a4 BP |
664 | if (ofp_version == OFP10_VERSION) { |
665 | struct ofp10_action_enqueue *oae; | |
c2d967a5 | 666 | |
c2d936a4 BP |
667 | oae = put_OFPAT10_ENQUEUE(out); |
668 | oae->port = htons(ofp_to_u16(enqueue->port)); | |
669 | oae->queue_id = htonl(enqueue->queue); | |
670 | } else { | |
671 | /* XXX */ | |
c2d967a5 | 672 | } |
c2d936a4 | 673 | } |
c2d967a5 | 674 | |
cab50449 | 675 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
676 | parse_ENQUEUE(char *arg, struct ofpbuf *ofpacts, |
677 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
678 | { | |
679 | char *sp = NULL; | |
680 | char *port = strtok_r(arg, ":q,", &sp); | |
681 | char *queue = strtok_r(NULL, "", &sp); | |
682 | struct ofpact_enqueue *enqueue; | |
c2d967a5 | 683 | |
c2d936a4 BP |
684 | if (port == NULL || queue == NULL) { |
685 | return xstrdup("\"enqueue\" syntax is \"enqueue:PORT:QUEUE\" or " | |
686 | "\"enqueue(PORT,QUEUE)\""); | |
c2d967a5 MM |
687 | } |
688 | ||
c2d936a4 BP |
689 | enqueue = ofpact_put_ENQUEUE(ofpacts); |
690 | if (!ofputil_port_from_string(port, &enqueue->port)) { | |
691 | return xasprintf("%s: enqueue to unknown port", port); | |
692 | } | |
693 | return str_to_u32(queue, &enqueue->queue); | |
c2d967a5 MM |
694 | } |
695 | ||
c2d936a4 BP |
696 | static void |
697 | format_ENQUEUE(const struct ofpact_enqueue *a, struct ds *s) | |
29089a54 | 698 | { |
c2d936a4 BP |
699 | ds_put_format(s, "enqueue:"); |
700 | ofputil_format_port(a->port, s); | |
701 | ds_put_format(s, ":%"PRIu32, a->queue); | |
702 | } | |
703 | \f | |
704 | /* Action structure for NXAST_OUTPUT_REG. | |
705 | * | |
706 | * Outputs to the OpenFlow port number written to src[ofs:ofs+nbits]. | |
707 | * | |
708 | * The format and semantics of 'src' and 'ofs_nbits' are similar to those for | |
709 | * the NXAST_REG_LOAD action. | |
710 | * | |
711 | * The acceptable nxm_header values for 'src' are the same as the acceptable | |
712 | * nxm_header values for the 'src' field of NXAST_REG_MOVE. | |
713 | * | |
714 | * The 'max_len' field indicates the number of bytes to send when the chosen | |
715 | * port is OFPP_CONTROLLER. Its semantics are equivalent to the 'max_len' | |
716 | * field of OFPAT_OUTPUT. | |
717 | * | |
718 | * The 'zero' field is required to be zeroed for forward compatibility. */ | |
719 | struct nx_action_output_reg { | |
720 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
721 | ovs_be16 len; /* 24. */ | |
722 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
723 | ovs_be16 subtype; /* NXAST_OUTPUT_REG. */ | |
29089a54 | 724 | |
c2d936a4 BP |
725 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ |
726 | ovs_be32 src; /* Source. */ | |
29089a54 | 727 | |
c2d936a4 | 728 | ovs_be16 max_len; /* Max length to send to controller. */ |
29089a54 | 729 | |
c2d936a4 BP |
730 | uint8_t zero[6]; /* Reserved, must be zero. */ |
731 | }; | |
732 | OFP_ASSERT(sizeof(struct nx_action_output_reg) == 24); | |
29089a54 | 733 | |
bad8a439 BP |
734 | /* Action structure for NXAST_OUTPUT_REG2. |
735 | * | |
736 | * Like the NXAST_OUTPUT_REG but organized so that there is room for a 64-bit | |
737 | * experimenter OXM as 'src'. | |
738 | */ | |
739 | struct nx_action_output_reg2 { | |
740 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
741 | ovs_be16 len; /* 24. */ | |
742 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
743 | ovs_be16 subtype; /* NXAST_OUTPUT_REG2. */ | |
744 | ||
745 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
746 | ovs_be16 max_len; /* Max length to send to controller. */ | |
747 | ||
748 | /* Followed by: | |
749 | * - 'src', as an OXM/NXM header (either 4 or 8 bytes). | |
750 | * - Enough 0-bytes to pad the action out to 24 bytes. */ | |
751 | uint8_t pad[10]; | |
752 | }; | |
753 | OFP_ASSERT(sizeof(struct nx_action_output_reg2) == 24); | |
754 | ||
a7a2d006 | 755 | static enum ofperr |
c2d936a4 BP |
756 | decode_NXAST_RAW_OUTPUT_REG(const struct nx_action_output_reg *naor, |
757 | struct ofpbuf *out) | |
a7a2d006 | 758 | { |
c2d936a4 | 759 | struct ofpact_output_reg *output_reg; |
a7a2d006 | 760 | |
c2d936a4 | 761 | if (!is_all_zeros(naor->zero, sizeof naor->zero)) { |
a7a2d006 JS |
762 | return OFPERR_OFPBAC_BAD_ARGUMENT; |
763 | } | |
a7a2d006 | 764 | |
c2d936a4 | 765 | output_reg = ofpact_put_OUTPUT_REG(out); |
bad8a439 | 766 | output_reg->ofpact.raw = NXAST_RAW_OUTPUT_REG; |
c2d936a4 BP |
767 | output_reg->src.field = mf_from_nxm_header(ntohl(naor->src)); |
768 | output_reg->src.ofs = nxm_decode_ofs(naor->ofs_nbits); | |
769 | output_reg->src.n_bits = nxm_decode_n_bits(naor->ofs_nbits); | |
770 | output_reg->max_len = ntohs(naor->max_len); | |
771 | ||
772 | return mf_check_src(&output_reg->src, NULL); | |
a7a2d006 JS |
773 | } |
774 | ||
bad8a439 BP |
775 | static enum ofperr |
776 | decode_NXAST_RAW_OUTPUT_REG2(const struct nx_action_output_reg2 *naor, | |
777 | struct ofpbuf *out) | |
778 | { | |
779 | struct ofpact_output_reg *output_reg; | |
780 | enum ofperr error; | |
781 | struct ofpbuf b; | |
782 | ||
783 | output_reg = ofpact_put_OUTPUT_REG(out); | |
784 | output_reg->ofpact.raw = NXAST_RAW_OUTPUT_REG2; | |
785 | output_reg->src.ofs = nxm_decode_ofs(naor->ofs_nbits); | |
786 | output_reg->src.n_bits = nxm_decode_n_bits(naor->ofs_nbits); | |
787 | output_reg->max_len = ntohs(naor->max_len); | |
788 | ||
789 | ofpbuf_use_const(&b, naor, ntohs(naor->len)); | |
790 | ofpbuf_pull(&b, OBJECT_OFFSETOF(naor, pad)); | |
791 | error = nx_pull_header(&b, &output_reg->src.field, NULL); | |
792 | if (error) { | |
793 | return error; | |
794 | } | |
6fd6ed71 | 795 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
796 | return OFPERR_NXBRC_MUST_BE_ZERO; |
797 | } | |
798 | ||
799 | return mf_check_src(&output_reg->src, NULL); | |
800 | } | |
801 | ||
c2d936a4 BP |
802 | static void |
803 | encode_OUTPUT_REG(const struct ofpact_output_reg *output_reg, | |
804 | enum ofp_version ofp_version OVS_UNUSED, | |
805 | struct ofpbuf *out) | |
f25d0cf3 | 806 | { |
bad8a439 BP |
807 | /* If 'output_reg' came in as an NXAST_RAW_OUTPUT_REG2 action, or if it |
808 | * cannot be encoded in the older form, encode it as | |
809 | * NXAST_RAW_OUTPUT_REG2. */ | |
810 | if (output_reg->ofpact.raw == NXAST_RAW_OUTPUT_REG2 | |
811 | || !mf_nxm_header(output_reg->src.field->id)) { | |
812 | struct nx_action_output_reg2 *naor = put_NXAST_OUTPUT_REG2(out); | |
6fd6ed71 | 813 | size_t size = out->size; |
bad8a439 BP |
814 | |
815 | naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs, | |
816 | output_reg->src.n_bits); | |
817 | naor->max_len = htons(output_reg->max_len); | |
818 | ||
6fd6ed71 | 819 | out->size = size - sizeof naor->pad; |
bad8a439 | 820 | nx_put_header(out, output_reg->src.field->id, 0, false); |
6fd6ed71 | 821 | out->size = size; |
bad8a439 BP |
822 | } else { |
823 | struct nx_action_output_reg *naor = put_NXAST_OUTPUT_REG(out); | |
f25d0cf3 | 824 | |
bad8a439 BP |
825 | naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs, |
826 | output_reg->src.n_bits); | |
827 | naor->src = htonl(mf_nxm_header(output_reg->src.field->id)); | |
828 | naor->max_len = htons(output_reg->max_len); | |
829 | } | |
f25d0cf3 BP |
830 | } |
831 | ||
cab50449 | 832 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
833 | parse_OUTPUT_REG(const char *arg, struct ofpbuf *ofpacts, |
834 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
f25d0cf3 | 835 | { |
c2d936a4 | 836 | return parse_OUTPUT(arg, ofpacts, usable_protocols); |
f25d0cf3 BP |
837 | } |
838 | ||
c2d936a4 BP |
839 | static void |
840 | format_OUTPUT_REG(const struct ofpact_output_reg *a, struct ds *s) | |
f25d0cf3 | 841 | { |
c2d936a4 BP |
842 | ds_put_cstr(s, "output:"); |
843 | mf_format_subfield(&a->src, s); | |
844 | } | |
845 | \f | |
846 | /* Action structure for NXAST_BUNDLE and NXAST_BUNDLE_LOAD. | |
847 | * | |
848 | * The bundle actions choose a slave from a supplied list of options. | |
849 | * NXAST_BUNDLE outputs to its selection. NXAST_BUNDLE_LOAD writes its | |
850 | * selection to a register. | |
851 | * | |
852 | * The list of possible slaves follows the nx_action_bundle structure. The size | |
853 | * of each slave is governed by its type as indicated by the 'slave_type' | |
854 | * parameter. The list of slaves should be padded at its end with zeros to make | |
855 | * the total length of the action a multiple of 8. | |
856 | * | |
857 | * Switches infer from the 'slave_type' parameter the size of each slave. All | |
858 | * implementations must support the NXM_OF_IN_PORT 'slave_type' which indicates | |
859 | * that the slaves are OpenFlow port numbers with NXM_LENGTH(NXM_OF_IN_PORT) == | |
860 | * 2 byte width. Switches should reject actions which indicate unknown or | |
861 | * unsupported slave types. | |
862 | * | |
863 | * Switches use a strategy dictated by the 'algorithm' parameter to choose a | |
864 | * slave. If the switch does not support the specified 'algorithm' parameter, | |
865 | * it should reject the action. | |
866 | * | |
867 | * Several algorithms take into account liveness when selecting slaves. The | |
868 | * liveness of a slave is implementation defined (with one exception), but will | |
869 | * generally take into account things like its carrier status and the results | |
870 | * of any link monitoring protocols which happen to be running on it. In order | |
871 | * to give controllers a place-holder value, the OFPP_NONE port is always | |
872 | * considered live. | |
873 | * | |
874 | * Some slave selection strategies require the use of a hash function, in which | |
875 | * case the 'fields' and 'basis' parameters should be populated. The 'fields' | |
876 | * parameter (one of NX_HASH_FIELDS_*) designates which parts of the flow to | |
877 | * hash. Refer to the definition of "enum nx_hash_fields" for details. The | |
878 | * 'basis' parameter is used as a universal hash parameter. Different values | |
879 | * of 'basis' yield different hash results. | |
880 | * | |
881 | * The 'zero' parameter at the end of the action structure is reserved for | |
882 | * future use. Switches are required to reject actions which have nonzero | |
883 | * bytes in the 'zero' field. | |
884 | * | |
885 | * NXAST_BUNDLE actions should have 'ofs_nbits' and 'dst' zeroed. Switches | |
886 | * should reject actions which have nonzero bytes in either of these fields. | |
887 | * | |
888 | * NXAST_BUNDLE_LOAD stores the OpenFlow port number of the selected slave in | |
889 | * dst[ofs:ofs+n_bits]. The format and semantics of 'dst' and 'ofs_nbits' are | |
890 | * similar to those for the NXAST_REG_LOAD action. */ | |
891 | struct nx_action_bundle { | |
892 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
893 | ovs_be16 len; /* Length including slaves. */ | |
894 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
895 | ovs_be16 subtype; /* NXAST_BUNDLE or NXAST_BUNDLE_LOAD. */ | |
f25d0cf3 | 896 | |
c2d936a4 BP |
897 | /* Slave choice algorithm to apply to hash value. */ |
898 | ovs_be16 algorithm; /* One of NX_BD_ALG_*. */ | |
4cceacb9 | 899 | |
c2d936a4 BP |
900 | /* What fields to hash and how. */ |
901 | ovs_be16 fields; /* One of NX_HASH_FIELDS_*. */ | |
902 | ovs_be16 basis; /* Universal hash parameter. */ | |
f25d0cf3 | 903 | |
c2d936a4 BP |
904 | ovs_be32 slave_type; /* NXM_OF_IN_PORT. */ |
905 | ovs_be16 n_slaves; /* Number of slaves. */ | |
f25d0cf3 | 906 | |
c2d936a4 BP |
907 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ |
908 | ovs_be32 dst; /* Destination. */ | |
f25d0cf3 | 909 | |
c2d936a4 BP |
910 | uint8_t zero[4]; /* Reserved. Must be zero. */ |
911 | }; | |
912 | OFP_ASSERT(sizeof(struct nx_action_bundle) == 32); | |
f25d0cf3 | 913 | |
c2d936a4 BP |
914 | static enum ofperr |
915 | decode_bundle(bool load, const struct nx_action_bundle *nab, | |
916 | struct ofpbuf *ofpacts) | |
917 | { | |
918 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
919 | struct ofpact_bundle *bundle; | |
920 | uint32_t slave_type; | |
921 | size_t slaves_size, i; | |
922 | enum ofperr error; | |
bd85dac1 | 923 | |
c2d936a4 BP |
924 | bundle = ofpact_put_BUNDLE(ofpacts); |
925 | ||
926 | bundle->n_slaves = ntohs(nab->n_slaves); | |
927 | bundle->basis = ntohs(nab->basis); | |
928 | bundle->fields = ntohs(nab->fields); | |
929 | bundle->algorithm = ntohs(nab->algorithm); | |
930 | slave_type = ntohl(nab->slave_type); | |
931 | slaves_size = ntohs(nab->len) - sizeof *nab; | |
932 | ||
933 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
934 | if (!flow_hash_fields_valid(bundle->fields)) { | |
935 | VLOG_WARN_RL(&rl, "unsupported fields %d", (int) bundle->fields); | |
936 | } else if (bundle->n_slaves > BUNDLE_MAX_SLAVES) { | |
937 | VLOG_WARN_RL(&rl, "too many slaves"); | |
938 | } else if (bundle->algorithm != NX_BD_ALG_HRW | |
939 | && bundle->algorithm != NX_BD_ALG_ACTIVE_BACKUP) { | |
940 | VLOG_WARN_RL(&rl, "unsupported algorithm %d", (int) bundle->algorithm); | |
508a9338 | 941 | } else if (slave_type != mf_nxm_header(MFF_IN_PORT)) { |
c2d936a4 BP |
942 | VLOG_WARN_RL(&rl, "unsupported slave type %"PRIu16, slave_type); |
943 | } else { | |
944 | error = 0; | |
945 | } | |
bd85dac1 | 946 | |
c2d936a4 BP |
947 | if (!is_all_zeros(nab->zero, sizeof nab->zero)) { |
948 | VLOG_WARN_RL(&rl, "reserved field is nonzero"); | |
949 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
950 | } | |
f25d0cf3 | 951 | |
c2d936a4 BP |
952 | if (load) { |
953 | bundle->dst.field = mf_from_nxm_header(ntohl(nab->dst)); | |
954 | bundle->dst.ofs = nxm_decode_ofs(nab->ofs_nbits); | |
955 | bundle->dst.n_bits = nxm_decode_n_bits(nab->ofs_nbits); | |
f25d0cf3 | 956 | |
c2d936a4 BP |
957 | if (bundle->dst.n_bits < 16) { |
958 | VLOG_WARN_RL(&rl, "bundle_load action requires at least 16 bit " | |
959 | "destination."); | |
960 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
961 | } | |
962 | } else { | |
963 | if (nab->ofs_nbits || nab->dst) { | |
964 | VLOG_WARN_RL(&rl, "bundle action has nonzero reserved fields"); | |
965 | error = OFPERR_OFPBAC_BAD_ARGUMENT; | |
966 | } | |
967 | } | |
f25d0cf3 | 968 | |
c2d936a4 BP |
969 | if (slaves_size < bundle->n_slaves * sizeof(ovs_be16)) { |
970 | VLOG_WARN_RL(&rl, "Nicira action %s only has %"PRIuSIZE" bytes " | |
971 | "allocated for slaves. %"PRIuSIZE" bytes are required " | |
972 | "for %"PRIu16" slaves.", | |
973 | load ? "bundle_load" : "bundle", slaves_size, | |
974 | bundle->n_slaves * sizeof(ovs_be16), bundle->n_slaves); | |
975 | error = OFPERR_OFPBAC_BAD_LEN; | |
976 | } | |
f25d0cf3 | 977 | |
c2d936a4 BP |
978 | for (i = 0; i < bundle->n_slaves; i++) { |
979 | uint16_t ofp_port = ntohs(((ovs_be16 *)(nab + 1))[i]); | |
980 | ofpbuf_put(ofpacts, &ofp_port, sizeof ofp_port); | |
981 | } | |
f25d0cf3 | 982 | |
6fd6ed71 | 983 | bundle = ofpacts->header; |
c2d936a4 | 984 | ofpact_update_len(ofpacts, &bundle->ofpact); |
f25d0cf3 | 985 | |
c2d936a4 BP |
986 | if (!error) { |
987 | error = bundle_check(bundle, OFPP_MAX, NULL); | |
988 | } | |
989 | return error; | |
990 | } | |
f25d0cf3 | 991 | |
c2d936a4 BP |
992 | static enum ofperr |
993 | decode_NXAST_RAW_BUNDLE(const struct nx_action_bundle *nab, struct ofpbuf *out) | |
994 | { | |
995 | return decode_bundle(false, nab, out); | |
996 | } | |
f25d0cf3 | 997 | |
c2d936a4 BP |
998 | static enum ofperr |
999 | decode_NXAST_RAW_BUNDLE_LOAD(const struct nx_action_bundle *nab, | |
1000 | struct ofpbuf *out) | |
1001 | { | |
1002 | return decode_bundle(true, nab, out); | |
1003 | } | |
c2d967a5 | 1004 | |
c2d936a4 BP |
1005 | static void |
1006 | encode_BUNDLE(const struct ofpact_bundle *bundle, | |
1007 | enum ofp_version ofp_version OVS_UNUSED, | |
1008 | struct ofpbuf *out) | |
1009 | { | |
1010 | int slaves_len = ROUND_UP(2 * bundle->n_slaves, OFP_ACTION_ALIGN); | |
1011 | struct nx_action_bundle *nab; | |
1012 | ovs_be16 *slaves; | |
1013 | size_t i; | |
f25d0cf3 | 1014 | |
c2d936a4 BP |
1015 | nab = (bundle->dst.field |
1016 | ? put_NXAST_BUNDLE_LOAD(out) | |
1017 | : put_NXAST_BUNDLE(out)); | |
1018 | nab->len = htons(ntohs(nab->len) + slaves_len); | |
1019 | nab->algorithm = htons(bundle->algorithm); | |
1020 | nab->fields = htons(bundle->fields); | |
1021 | nab->basis = htons(bundle->basis); | |
508a9338 | 1022 | nab->slave_type = htonl(mf_nxm_header(MFF_IN_PORT)); |
c2d936a4 BP |
1023 | nab->n_slaves = htons(bundle->n_slaves); |
1024 | if (bundle->dst.field) { | |
1025 | nab->ofs_nbits = nxm_encode_ofs_nbits(bundle->dst.ofs, | |
1026 | bundle->dst.n_bits); | |
508a9338 | 1027 | nab->dst = htonl(mf_nxm_header(bundle->dst.field->id)); |
c2d936a4 | 1028 | } |
f25d0cf3 | 1029 | |
c2d936a4 BP |
1030 | slaves = ofpbuf_put_zeros(out, slaves_len); |
1031 | for (i = 0; i < bundle->n_slaves; i++) { | |
1032 | slaves[i] = htons(ofp_to_u16(bundle->slaves[i])); | |
1033 | } | |
1034 | } | |
b02475c5 | 1035 | |
cab50449 | 1036 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1037 | parse_BUNDLE(const char *arg, struct ofpbuf *ofpacts, |
1038 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1039 | { | |
1040 | return bundle_parse(arg, ofpacts); | |
1041 | } | |
b02475c5 | 1042 | |
cab50449 | 1043 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1044 | parse_bundle_load(const char *arg, struct ofpbuf *ofpacts) |
1045 | { | |
1046 | return bundle_parse_load(arg, ofpacts); | |
1047 | } | |
097d4939 | 1048 | |
c2d936a4 BP |
1049 | static void |
1050 | format_BUNDLE(const struct ofpact_bundle *a, struct ds *s) | |
1051 | { | |
1052 | bundle_format(a, s); | |
1053 | } | |
1054 | \f | |
1055 | /* Set VLAN actions. */ | |
097d4939 | 1056 | |
c2d936a4 BP |
1057 | static enum ofperr |
1058 | decode_set_vlan_vid(uint16_t vid, bool push_vlan_if_needed, struct ofpbuf *out) | |
1059 | { | |
1060 | if (vid & ~0xfff) { | |
1061 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1062 | } else { | |
1063 | struct ofpact_vlan_vid *vlan_vid = ofpact_put_SET_VLAN_VID(out); | |
1064 | vlan_vid->vlan_vid = vid; | |
1065 | vlan_vid->push_vlan_if_needed = push_vlan_if_needed; | |
1066 | return 0; | |
1067 | } | |
1068 | } | |
0f3f3c3d | 1069 | |
c2d936a4 BP |
1070 | static enum ofperr |
1071 | decode_OFPAT_RAW10_SET_VLAN_VID(uint16_t vid, struct ofpbuf *out) | |
1072 | { | |
1073 | return decode_set_vlan_vid(vid, true, out); | |
1074 | } | |
b676167a | 1075 | |
c2d936a4 BP |
1076 | static enum ofperr |
1077 | decode_OFPAT_RAW11_SET_VLAN_VID(uint16_t vid, struct ofpbuf *out) | |
1078 | { | |
1079 | return decode_set_vlan_vid(vid, false, out); | |
1080 | } | |
29089a54 | 1081 | |
c2d936a4 BP |
1082 | static void |
1083 | encode_SET_VLAN_VID(const struct ofpact_vlan_vid *vlan_vid, | |
1084 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1085 | { | |
1086 | uint16_t vid = vlan_vid->vlan_vid; | |
1087 | ||
1088 | /* Push a VLAN tag, if none is present and this form of the action calls | |
1089 | * for such a feature. */ | |
1090 | if (ofp_version > OFP10_VERSION | |
1091 | && vlan_vid->push_vlan_if_needed | |
1092 | && !vlan_vid->flow_has_vlan) { | |
1093 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
f25d0cf3 BP |
1094 | } |
1095 | ||
c2d936a4 BP |
1096 | if (ofp_version == OFP10_VERSION) { |
1097 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
1098 | } else if (ofp_version == OFP11_VERSION) { | |
1099 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
1100 | } else { | |
1101 | ofpact_put_set_field(out, ofp_version, | |
1102 | MFF_VLAN_VID, vid | OFPVID12_PRESENT); | |
1103 | } | |
f25d0cf3 BP |
1104 | } |
1105 | ||
cab50449 | 1106 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 1107 | parse_set_vlan_vid(char *arg, struct ofpbuf *ofpacts, bool push_vlan_if_needed) |
d01c980f | 1108 | { |
ca287d20 | 1109 | struct ofpact_vlan_vid *vlan_vid; |
c2d936a4 BP |
1110 | uint16_t vid; |
1111 | char *error; | |
d01c980f | 1112 | |
c2d936a4 | 1113 | error = str_to_u16(arg, "VLAN VID", &vid); |
d01c980f BP |
1114 | if (error) { |
1115 | return error; | |
1116 | } | |
1117 | ||
c2d936a4 BP |
1118 | if (vid & ~VLAN_VID_MASK) { |
1119 | return xasprintf("%s: not a valid VLAN VID", arg); | |
d01c980f | 1120 | } |
c2d936a4 BP |
1121 | vlan_vid = ofpact_put_SET_VLAN_VID(ofpacts); |
1122 | vlan_vid->vlan_vid = vid; | |
1123 | vlan_vid->push_vlan_if_needed = push_vlan_if_needed; | |
1124 | return NULL; | |
1125 | } | |
d01c980f | 1126 | |
cab50449 | 1127 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1128 | parse_SET_VLAN_VID(char *arg, struct ofpbuf *ofpacts, |
1129 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1130 | { | |
1131 | return parse_set_vlan_vid(arg, ofpacts, false); | |
d01c980f BP |
1132 | } |
1133 | ||
c2d936a4 BP |
1134 | static void |
1135 | format_SET_VLAN_VID(const struct ofpact_vlan_vid *a, struct ds *s) | |
1136 | { | |
1137 | ds_put_format(s, "%s:%"PRIu16, | |
1138 | a->push_vlan_if_needed ? "mod_vlan_vid" : "set_vlan_vid", | |
1139 | a->vlan_vid); | |
1140 | } | |
1141 | \f | |
1142 | /* Set PCP actions. */ | |
e3f8f887 | 1143 | |
c2d936a4 BP |
1144 | static enum ofperr |
1145 | decode_set_vlan_pcp(uint8_t pcp, bool push_vlan_if_needed, struct ofpbuf *out) | |
f25d0cf3 | 1146 | { |
c2d936a4 BP |
1147 | if (pcp & ~7) { |
1148 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1149 | } else { | |
1150 | struct ofpact_vlan_pcp *vlan_pcp = ofpact_put_SET_VLAN_PCP(out); | |
1151 | vlan_pcp->vlan_pcp = pcp; | |
1152 | vlan_pcp->push_vlan_if_needed = push_vlan_if_needed; | |
1153 | return 0; | |
1154 | } | |
f25d0cf3 BP |
1155 | } |
1156 | ||
c2d936a4 BP |
1157 | static enum ofperr |
1158 | decode_OFPAT_RAW10_SET_VLAN_PCP(uint8_t pcp, struct ofpbuf *out) | |
f25d0cf3 | 1159 | { |
c2d936a4 | 1160 | return decode_set_vlan_pcp(pcp, true, out); |
f25d0cf3 BP |
1161 | } |
1162 | ||
c2d936a4 BP |
1163 | static enum ofperr |
1164 | decode_OFPAT_RAW11_SET_VLAN_PCP(uint8_t pcp, struct ofpbuf *out) | |
1165 | { | |
1166 | return decode_set_vlan_pcp(pcp, false, out); | |
1167 | } | |
f25d0cf3 | 1168 | |
699dddf1 | 1169 | static void |
c2d936a4 BP |
1170 | encode_SET_VLAN_PCP(const struct ofpact_vlan_pcp *vlan_pcp, |
1171 | enum ofp_version ofp_version, struct ofpbuf *out) | |
699dddf1 | 1172 | { |
c2d936a4 BP |
1173 | uint8_t pcp = vlan_pcp->vlan_pcp; |
1174 | ||
1175 | /* Push a VLAN tag, if none is present and this form of the action calls | |
1176 | * for such a feature. */ | |
1177 | if (ofp_version > OFP10_VERSION | |
1178 | && vlan_pcp->push_vlan_if_needed | |
1179 | && !vlan_pcp->flow_has_vlan) { | |
1180 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
1181 | } | |
699dddf1 | 1182 | |
c2d936a4 BP |
1183 | if (ofp_version == OFP10_VERSION) { |
1184 | put_OFPAT10_SET_VLAN_PCP(out, pcp); | |
1185 | } else if (ofp_version == OFP11_VERSION) { | |
1186 | put_OFPAT11_SET_VLAN_PCP(out, pcp); | |
1187 | } else { | |
1188 | ofpact_put_set_field(out, ofp_version, MFF_VLAN_PCP, pcp); | |
699dddf1 BP |
1189 | } |
1190 | } | |
1191 | ||
cab50449 | 1192 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 | 1193 | parse_set_vlan_pcp(char *arg, struct ofpbuf *ofpacts, bool push_vlan_if_needed) |
f25d0cf3 | 1194 | { |
c2d936a4 BP |
1195 | struct ofpact_vlan_pcp *vlan_pcp; |
1196 | uint8_t pcp; | |
1197 | char *error; | |
e3f8f887 | 1198 | |
c2d936a4 BP |
1199 | error = str_to_u8(arg, "VLAN PCP", &pcp); |
1200 | if (error) { | |
699dddf1 | 1201 | return error; |
f25d0cf3 BP |
1202 | } |
1203 | ||
c2d936a4 BP |
1204 | if (pcp & ~7) { |
1205 | return xasprintf("%s: not a valid VLAN PCP", arg); | |
1206 | } | |
1207 | vlan_pcp = ofpact_put_SET_VLAN_PCP(ofpacts); | |
1208 | vlan_pcp->vlan_pcp = pcp; | |
1209 | vlan_pcp->push_vlan_if_needed = push_vlan_if_needed; | |
1210 | return NULL; | |
1211 | } | |
1212 | ||
cab50449 | 1213 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1214 | parse_SET_VLAN_PCP(char *arg, struct ofpbuf *ofpacts, |
1215 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1216 | { | |
1217 | return parse_set_vlan_pcp(arg, ofpacts, false); | |
1218 | } | |
1219 | ||
1220 | static void | |
1221 | format_SET_VLAN_PCP(const struct ofpact_vlan_pcp *a, struct ds *s) | |
1222 | { | |
1223 | ds_put_format(s, "%s:%"PRIu8, | |
1224 | a->push_vlan_if_needed ? "mod_vlan_pcp" : "set_vlan_pcp", | |
1225 | a->vlan_pcp); | |
1226 | } | |
1227 | \f | |
1228 | /* Strip VLAN actions. */ | |
1229 | ||
1230 | static enum ofperr | |
1231 | decode_OFPAT_RAW10_STRIP_VLAN(struct ofpbuf *out) | |
1232 | { | |
1233 | ofpact_put_STRIP_VLAN(out)->ofpact.raw = OFPAT_RAW10_STRIP_VLAN; | |
f25d0cf3 BP |
1234 | return 0; |
1235 | } | |
1236 | ||
8f2cded4 | 1237 | static enum ofperr |
c2d936a4 | 1238 | decode_OFPAT_RAW11_POP_VLAN(struct ofpbuf *out) |
8f2cded4 | 1239 | { |
c2d936a4 BP |
1240 | ofpact_put_STRIP_VLAN(out)->ofpact.raw = OFPAT_RAW11_POP_VLAN; |
1241 | return 0; | |
1242 | } | |
f25d0cf3 | 1243 | |
c2d936a4 BP |
1244 | static void |
1245 | encode_STRIP_VLAN(const struct ofpact_null *null OVS_UNUSED, | |
1246 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1247 | { | |
1248 | if (ofp_version == OFP10_VERSION) { | |
1249 | put_OFPAT10_STRIP_VLAN(out); | |
1250 | } else { | |
1251 | put_OFPAT11_POP_VLAN(out); | |
1252 | } | |
1253 | } | |
f25d0cf3 | 1254 | |
cab50449 | 1255 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1256 | parse_STRIP_VLAN(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
1257 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1258 | { | |
1259 | ofpact_put_STRIP_VLAN(ofpacts)->ofpact.raw = OFPAT_RAW10_STRIP_VLAN; | |
1260 | return NULL; | |
1261 | } | |
1262 | ||
cab50449 | 1263 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1264 | parse_pop_vlan(struct ofpbuf *ofpacts) |
1265 | { | |
1266 | ofpact_put_STRIP_VLAN(ofpacts)->ofpact.raw = OFPAT_RAW11_POP_VLAN; | |
1267 | return NULL; | |
1268 | } | |
1269 | ||
1270 | static void | |
1271 | format_STRIP_VLAN(const struct ofpact_null *a, struct ds *s) | |
1272 | { | |
1273 | ds_put_cstr(s, (a->ofpact.raw == OFPAT_RAW11_POP_VLAN | |
1274 | ? "pop_vlan" | |
1275 | : "strip_vlan")); | |
1276 | } | |
1277 | \f | |
1278 | /* Push VLAN action. */ | |
1279 | ||
1280 | static enum ofperr | |
1281 | decode_OFPAT_RAW11_PUSH_VLAN(ovs_be16 eth_type, struct ofpbuf *out) | |
1282 | { | |
1283 | if (eth_type != htons(ETH_TYPE_VLAN_8021Q)) { | |
1284 | /* XXX 802.1AD(QinQ) isn't supported at the moment */ | |
1285 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
f25d0cf3 | 1286 | } |
c2d936a4 BP |
1287 | ofpact_put_PUSH_VLAN(out); |
1288 | return 0; | |
1289 | } | |
f25d0cf3 | 1290 | |
c2d936a4 BP |
1291 | static void |
1292 | encode_PUSH_VLAN(const struct ofpact_null *null OVS_UNUSED, | |
1293 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1294 | { | |
1295 | if (ofp_version == OFP10_VERSION) { | |
1296 | /* PUSH is a side effect of a SET_VLAN_VID/PCP, which should | |
1297 | * follow this action. */ | |
1298 | } else { | |
1299 | /* XXX ETH_TYPE_VLAN_8021AD case */ | |
1300 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
f25d0cf3 | 1301 | } |
c2d936a4 | 1302 | } |
f25d0cf3 | 1303 | |
cab50449 | 1304 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1305 | parse_PUSH_VLAN(char *arg, struct ofpbuf *ofpacts, |
1306 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1307 | { | |
1308 | uint16_t ethertype; | |
1309 | char *error; | |
1310 | ||
1311 | *usable_protocols &= OFPUTIL_P_OF11_UP; | |
1312 | error = str_to_u16(arg, "ethertype", ðertype); | |
4cceacb9 | 1313 | if (error) { |
4cceacb9 JS |
1314 | return error; |
1315 | } | |
1316 | ||
c2d936a4 BP |
1317 | if (ethertype != ETH_TYPE_VLAN_8021Q) { |
1318 | /* XXX ETH_TYPE_VLAN_8021AD case isn't supported */ | |
1319 | return xasprintf("%s: not a valid VLAN ethertype", arg); | |
f25d0cf3 | 1320 | } |
c2d936a4 BP |
1321 | |
1322 | ofpact_put_PUSH_VLAN(ofpacts); | |
1323 | return NULL; | |
d01c980f BP |
1324 | } |
1325 | ||
c2d936a4 BP |
1326 | static void |
1327 | format_PUSH_VLAN(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
8f2cded4 | 1328 | { |
c2d936a4 BP |
1329 | /* XXX 802.1AD case*/ |
1330 | ds_put_format(s, "push_vlan:%#"PRIx16, ETH_TYPE_VLAN_8021Q); | |
8f2cded4 | 1331 | } |
d01c980f | 1332 | \f |
c2d936a4 BP |
1333 | /* Action structure for OFPAT10_SET_DL_SRC/DST and OFPAT11_SET_DL_SRC/DST. */ |
1334 | struct ofp_action_dl_addr { | |
1335 | ovs_be16 type; /* Type. */ | |
1336 | ovs_be16 len; /* Length is 16. */ | |
74ff3298 | 1337 | struct eth_addr dl_addr; /* Ethernet address. */ |
c2d936a4 BP |
1338 | uint8_t pad[6]; |
1339 | }; | |
1340 | OFP_ASSERT(sizeof(struct ofp_action_dl_addr) == 16); | |
d01c980f | 1341 | |
d01c980f | 1342 | static enum ofperr |
c2d936a4 BP |
1343 | decode_OFPAT_RAW_SET_DL_SRC(const struct ofp_action_dl_addr *a, |
1344 | struct ofpbuf *out) | |
d01c980f | 1345 | { |
74ff3298 | 1346 | ofpact_put_SET_ETH_SRC(out)->mac = a->dl_addr; |
c2d936a4 BP |
1347 | return 0; |
1348 | } | |
3ddcaf2d | 1349 | |
c2d936a4 BP |
1350 | static enum ofperr |
1351 | decode_OFPAT_RAW_SET_DL_DST(const struct ofp_action_dl_addr *a, | |
1352 | struct ofpbuf *out) | |
1353 | { | |
74ff3298 | 1354 | ofpact_put_SET_ETH_DST(out)->mac = a->dl_addr; |
c2d936a4 BP |
1355 | return 0; |
1356 | } | |
d01c980f | 1357 | |
c2d936a4 BP |
1358 | static void |
1359 | encode_SET_ETH_addr(const struct ofpact_mac *mac, enum ofp_version ofp_version, | |
1360 | enum ofp_raw_action_type raw, enum mf_field_id field, | |
1361 | struct ofpbuf *out) | |
1362 | { | |
c2d936a4 BP |
1363 | if (ofp_version < OFP12_VERSION) { |
1364 | struct ofp_action_dl_addr *oada; | |
1365 | ||
1366 | oada = ofpact_put_raw(out, ofp_version, raw, 0); | |
74ff3298 | 1367 | oada->dl_addr = mac->mac; |
c2d936a4 BP |
1368 | } else { |
1369 | ofpact_put_set_field(out, ofp_version, field, | |
74ff3298 | 1370 | eth_addr_to_uint64(mac->mac)); |
d01c980f BP |
1371 | } |
1372 | } | |
1373 | ||
c2d936a4 BP |
1374 | static void |
1375 | encode_SET_ETH_SRC(const struct ofpact_mac *mac, enum ofp_version ofp_version, | |
1376 | struct ofpbuf *out) | |
b2dd70be | 1377 | { |
c2d936a4 BP |
1378 | encode_SET_ETH_addr(mac, ofp_version, OFPAT_RAW_SET_DL_SRC, MFF_ETH_SRC, |
1379 | out); | |
b2dd70be | 1380 | |
c2d936a4 | 1381 | } |
b2dd70be | 1382 | |
c2d936a4 BP |
1383 | static void |
1384 | encode_SET_ETH_DST(const struct ofpact_mac *mac, | |
1385 | enum ofp_version ofp_version, | |
1386 | struct ofpbuf *out) | |
1387 | { | |
1388 | encode_SET_ETH_addr(mac, ofp_version, OFPAT_RAW_SET_DL_DST, MFF_ETH_DST, | |
1389 | out); | |
b2dd70be | 1390 | |
c2d936a4 | 1391 | } |
b2dd70be | 1392 | |
cab50449 | 1393 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1394 | parse_SET_ETH_SRC(char *arg, struct ofpbuf *ofpacts, |
1395 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1396 | { | |
74ff3298 | 1397 | return str_to_mac(arg, &ofpact_put_SET_ETH_SRC(ofpacts)->mac); |
c2d936a4 BP |
1398 | } |
1399 | ||
cab50449 | 1400 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1401 | parse_SET_ETH_DST(char *arg, struct ofpbuf *ofpacts, |
1402 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1403 | { | |
74ff3298 | 1404 | return str_to_mac(arg, &ofpact_put_SET_ETH_DST(ofpacts)->mac); |
b2dd70be JR |
1405 | } |
1406 | ||
1407 | static void | |
c2d936a4 | 1408 | format_SET_ETH_SRC(const struct ofpact_mac *a, struct ds *s) |
b2dd70be | 1409 | { |
c2d936a4 BP |
1410 | ds_put_format(s, "mod_dl_src:"ETH_ADDR_FMT, ETH_ADDR_ARGS(a->mac)); |
1411 | } | |
b2dd70be | 1412 | |
c2d936a4 BP |
1413 | static void |
1414 | format_SET_ETH_DST(const struct ofpact_mac *a, struct ds *s) | |
1415 | { | |
1416 | ds_put_format(s, "mod_dl_dst:"ETH_ADDR_FMT, ETH_ADDR_ARGS(a->mac)); | |
1417 | } | |
1418 | \f | |
1419 | /* Set IPv4 address actions. */ | |
b2dd70be | 1420 | |
c2d936a4 BP |
1421 | static enum ofperr |
1422 | decode_OFPAT_RAW_SET_NW_SRC(ovs_be32 ipv4, struct ofpbuf *out) | |
1423 | { | |
1424 | ofpact_put_SET_IPV4_SRC(out)->ipv4 = ipv4; | |
1425 | return 0; | |
b2dd70be JR |
1426 | } |
1427 | ||
c2d936a4 BP |
1428 | static enum ofperr |
1429 | decode_OFPAT_RAW_SET_NW_DST(ovs_be32 ipv4, struct ofpbuf *out) | |
b2dd70be | 1430 | { |
c2d936a4 BP |
1431 | ofpact_put_SET_IPV4_DST(out)->ipv4 = ipv4; |
1432 | return 0; | |
1433 | } | |
b2dd70be | 1434 | |
c2d936a4 BP |
1435 | static void |
1436 | encode_SET_IPV4_addr(const struct ofpact_ipv4 *ipv4, | |
1437 | enum ofp_version ofp_version, | |
1438 | enum ofp_raw_action_type raw, enum mf_field_id field, | |
1439 | struct ofpbuf *out) | |
1440 | { | |
1441 | ovs_be32 addr = ipv4->ipv4; | |
1442 | if (ofp_version < OFP12_VERSION) { | |
1443 | ofpact_put_raw(out, ofp_version, raw, ntohl(addr)); | |
b2dd70be | 1444 | } else { |
c2d936a4 | 1445 | ofpact_put_set_field(out, ofp_version, field, ntohl(addr)); |
b2dd70be JR |
1446 | } |
1447 | } | |
1448 | ||
a6fd70bb | 1449 | static void |
c2d936a4 BP |
1450 | encode_SET_IPV4_SRC(const struct ofpact_ipv4 *ipv4, |
1451 | enum ofp_version ofp_version, struct ofpbuf *out) | |
a6fd70bb | 1452 | { |
c2d936a4 BP |
1453 | encode_SET_IPV4_addr(ipv4, ofp_version, OFPAT_RAW_SET_NW_SRC, MFF_IPV4_SRC, |
1454 | out); | |
1455 | } | |
a6fd70bb | 1456 | |
c2d936a4 BP |
1457 | static void |
1458 | encode_SET_IPV4_DST(const struct ofpact_ipv4 *ipv4, | |
1459 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1460 | { | |
1461 | encode_SET_IPV4_addr(ipv4, ofp_version, OFPAT_RAW_SET_NW_DST, MFF_IPV4_DST, | |
1462 | out); | |
1463 | } | |
a6fd70bb | 1464 | |
cab50449 | 1465 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1466 | parse_SET_IPV4_SRC(char *arg, struct ofpbuf *ofpacts, |
1467 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1468 | { | |
1469 | return str_to_ip(arg, &ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4); | |
1470 | } | |
a6fd70bb | 1471 | |
cab50449 | 1472 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1473 | parse_SET_IPV4_DST(char *arg, struct ofpbuf *ofpacts, |
1474 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1475 | { | |
1476 | return str_to_ip(arg, &ofpact_put_SET_IPV4_DST(ofpacts)->ipv4); | |
1477 | } | |
a6fd70bb | 1478 | |
c2d936a4 BP |
1479 | static void |
1480 | format_SET_IPV4_SRC(const struct ofpact_ipv4 *a, struct ds *s) | |
1481 | { | |
1482 | ds_put_format(s, "mod_nw_src:"IP_FMT, IP_ARGS(a->ipv4)); | |
1483 | } | |
097d4939 | 1484 | |
c2d936a4 BP |
1485 | static void |
1486 | format_SET_IPV4_DST(const struct ofpact_ipv4 *a, struct ds *s) | |
1487 | { | |
1488 | ds_put_format(s, "mod_nw_dst:"IP_FMT, IP_ARGS(a->ipv4)); | |
1489 | } | |
1490 | \f | |
1491 | /* Set IPv4/v6 TOS actions. */ | |
097d4939 | 1492 | |
c2d936a4 BP |
1493 | static enum ofperr |
1494 | decode_OFPAT_RAW_SET_NW_TOS(uint8_t dscp, struct ofpbuf *out) | |
1495 | { | |
1496 | if (dscp & ~IP_DSCP_MASK) { | |
1497 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
1498 | } else { | |
1499 | ofpact_put_SET_IP_DSCP(out)->dscp = dscp; | |
1500 | return 0; | |
a6fd70bb JR |
1501 | } |
1502 | } | |
1503 | ||
a6fd70bb | 1504 | static void |
c2d936a4 BP |
1505 | encode_SET_IP_DSCP(const struct ofpact_dscp *dscp, |
1506 | enum ofp_version ofp_version, struct ofpbuf *out) | |
a6fd70bb | 1507 | { |
c2d936a4 BP |
1508 | if (ofp_version < OFP12_VERSION) { |
1509 | put_OFPAT_SET_NW_TOS(out, ofp_version, dscp->dscp); | |
1510 | } else { | |
1511 | ofpact_put_set_field(out, ofp_version, | |
1512 | MFF_IP_DSCP_SHIFTED, dscp->dscp >> 2); | |
1513 | } | |
1514 | } | |
a6fd70bb | 1515 | |
cab50449 | 1516 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1517 | parse_SET_IP_DSCP(char *arg, struct ofpbuf *ofpacts, |
1518 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1519 | { | |
1520 | uint8_t tos; | |
1521 | char *error; | |
a6fd70bb | 1522 | |
c2d936a4 BP |
1523 | error = str_to_u8(arg, "TOS", &tos); |
1524 | if (error) { | |
1525 | return error; | |
1526 | } | |
a6fd70bb | 1527 | |
c2d936a4 BP |
1528 | if (tos & ~IP_DSCP_MASK) { |
1529 | return xasprintf("%s: not a valid TOS", arg); | |
a6fd70bb | 1530 | } |
c2d936a4 BP |
1531 | ofpact_put_SET_IP_DSCP(ofpacts)->dscp = tos; |
1532 | return NULL; | |
a6fd70bb JR |
1533 | } |
1534 | ||
b2dd70be | 1535 | static void |
c2d936a4 | 1536 | format_SET_IP_DSCP(const struct ofpact_dscp *a, struct ds *s) |
b2dd70be | 1537 | { |
c2d936a4 BP |
1538 | ds_put_format(s, "mod_nw_tos:%d", a->dscp); |
1539 | } | |
1540 | \f | |
1541 | /* Set IPv4/v6 ECN actions. */ | |
b2dd70be | 1542 | |
c2d936a4 BP |
1543 | static enum ofperr |
1544 | decode_OFPAT_RAW11_SET_NW_ECN(uint8_t ecn, struct ofpbuf *out) | |
1545 | { | |
1546 | if (ecn & ~IP_ECN_MASK) { | |
1547 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
b2dd70be | 1548 | } else { |
c2d936a4 BP |
1549 | ofpact_put_SET_IP_ECN(out)->ecn = ecn; |
1550 | return 0; | |
b2dd70be JR |
1551 | } |
1552 | } | |
1553 | ||
c2d936a4 BP |
1554 | static void |
1555 | encode_SET_IP_ECN(const struct ofpact_ecn *ip_ecn, | |
1556 | enum ofp_version ofp_version, struct ofpbuf *out) | |
d01c980f | 1557 | { |
c2d936a4 BP |
1558 | uint8_t ecn = ip_ecn->ecn; |
1559 | if (ofp_version == OFP10_VERSION) { | |
1560 | /* XXX */ | |
1561 | } else if (ofp_version == OFP11_VERSION) { | |
1562 | put_OFPAT11_SET_NW_ECN(out, ecn); | |
1563 | } else { | |
1564 | ofpact_put_set_field(out, ofp_version, MFF_IP_ECN, ecn); | |
1565 | } | |
1566 | } | |
d01c980f | 1567 | |
cab50449 | 1568 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1569 | parse_SET_IP_ECN(char *arg, struct ofpbuf *ofpacts, |
1570 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1571 | { | |
1572 | uint8_t ecn; | |
1573 | char *error; | |
d01c980f | 1574 | |
c2d936a4 | 1575 | error = str_to_u8(arg, "ECN", &ecn); |
d01c980f BP |
1576 | if (error) { |
1577 | return error; | |
1578 | } | |
1579 | ||
c2d936a4 BP |
1580 | if (ecn & ~IP_ECN_MASK) { |
1581 | return xasprintf("%s: not a valid ECN", arg); | |
1582 | } | |
1583 | ofpact_put_SET_IP_ECN(ofpacts)->ecn = ecn; | |
1584 | return NULL; | |
d01c980f BP |
1585 | } |
1586 | ||
c2d936a4 BP |
1587 | static void |
1588 | format_SET_IP_ECN(const struct ofpact_ecn *a, struct ds *s) | |
1589 | { | |
1590 | ds_put_format(s, "mod_nw_ecn:%d", a->ecn); | |
1591 | } | |
1592 | \f | |
1593 | /* Set IPv4/v6 TTL actions. */ | |
1594 | ||
d01c980f | 1595 | static enum ofperr |
c2d936a4 | 1596 | decode_OFPAT_RAW11_SET_NW_TTL(uint8_t ttl, struct ofpbuf *out) |
d01c980f | 1597 | { |
c2d936a4 BP |
1598 | ofpact_put_SET_IP_TTL(out)->ttl = ttl; |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | static void | |
1603 | encode_SET_IP_TTL(const struct ofpact_ip_ttl *ttl, | |
1604 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1605 | { | |
1606 | if (ofp_version >= OFP11_VERSION) { | |
1607 | put_OFPAT11_SET_NW_TTL(out, ttl->ttl); | |
1608 | } else { | |
1609 | /* XXX */ | |
1610 | } | |
1611 | } | |
1612 | ||
cab50449 | 1613 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1614 | parse_SET_IP_TTL(char *arg, struct ofpbuf *ofpacts, |
1615 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1616 | { | |
1617 | uint8_t ttl; | |
1618 | char *error; | |
d01c980f | 1619 | |
c2d936a4 | 1620 | error = str_to_u8(arg, "TTL", &ttl); |
d01c980f BP |
1621 | if (error) { |
1622 | return error; | |
1623 | } | |
1624 | ||
c2d936a4 BP |
1625 | ofpact_put_SET_IP_TTL(ofpacts)->ttl = ttl; |
1626 | return NULL; | |
1627 | } | |
d01c980f | 1628 | |
c2d936a4 BP |
1629 | static void |
1630 | format_SET_IP_TTL(const struct ofpact_ip_ttl *a, struct ds *s) | |
1631 | { | |
1632 | ds_put_format(s, "mod_nw_ttl:%d", a->ttl); | |
1633 | } | |
1634 | \f | |
1635 | /* Set TCP/UDP/SCTP port actions. */ | |
d01c980f | 1636 | |
c2d936a4 BP |
1637 | static enum ofperr |
1638 | decode_OFPAT_RAW_SET_TP_SRC(ovs_be16 port, struct ofpbuf *out) | |
1639 | { | |
1640 | ofpact_put_SET_L4_SRC_PORT(out)->port = ntohs(port); | |
1641 | return 0; | |
1642 | } | |
d01c980f | 1643 | |
c2d936a4 BP |
1644 | static enum ofperr |
1645 | decode_OFPAT_RAW_SET_TP_DST(ovs_be16 port, struct ofpbuf *out) | |
1646 | { | |
1647 | ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(port); | |
1648 | return 0; | |
1649 | } | |
d01c980f | 1650 | |
c2d936a4 BP |
1651 | static void |
1652 | encode_SET_L4_port(const struct ofpact_l4_port *l4_port, | |
1653 | enum ofp_version ofp_version, enum ofp_raw_action_type raw, | |
1654 | enum mf_field_id field, struct ofpbuf *out) | |
1655 | { | |
1656 | uint16_t port = l4_port->port; | |
3e34fbdd | 1657 | |
c2d936a4 BP |
1658 | if (ofp_version >= OFP12_VERSION && field != MFF_N_IDS) { |
1659 | ofpact_put_set_field(out, ofp_version, field, port); | |
1660 | } else { | |
1661 | ofpact_put_raw(out, ofp_version, raw, port); | |
1662 | } | |
1663 | } | |
8e61c110 | 1664 | |
c2d936a4 BP |
1665 | static void |
1666 | encode_SET_L4_SRC_PORT(const struct ofpact_l4_port *l4_port, | |
1667 | enum ofp_version ofp_version, struct ofpbuf *out) | |
1668 | { | |
1669 | uint8_t proto = l4_port->flow_ip_proto; | |
1670 | enum mf_field_id field = (proto == IPPROTO_TCP ? MFF_TCP_SRC | |
1671 | : proto == IPPROTO_UDP ? MFF_UDP_SRC | |
1672 | : proto == IPPROTO_SCTP ? MFF_SCTP_SRC | |
1673 | : MFF_N_IDS); | |
276c4e7a | 1674 | |
c2d936a4 BP |
1675 | encode_SET_L4_port(l4_port, ofp_version, OFPAT_RAW_SET_TP_SRC, field, out); |
1676 | } | |
d01c980f | 1677 | |
c2d936a4 BP |
1678 | static void |
1679 | encode_SET_L4_DST_PORT(const struct ofpact_l4_port *l4_port, | |
1680 | enum ofp_version ofp_version, | |
1681 | struct ofpbuf *out) | |
1682 | { | |
1683 | uint8_t proto = l4_port->flow_ip_proto; | |
1684 | enum mf_field_id field = (proto == IPPROTO_TCP ? MFF_TCP_DST | |
1685 | : proto == IPPROTO_UDP ? MFF_UDP_DST | |
1686 | : proto == IPPROTO_SCTP ? MFF_SCTP_DST | |
1687 | : MFF_N_IDS); | |
d01c980f | 1688 | |
c2d936a4 BP |
1689 | encode_SET_L4_port(l4_port, ofp_version, OFPAT_RAW_SET_TP_DST, field, out); |
1690 | } | |
7bcb1506 | 1691 | |
cab50449 | 1692 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1693 | parse_SET_L4_SRC_PORT(char *arg, struct ofpbuf *ofpacts, |
1694 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1695 | { | |
1696 | return str_to_u16(arg, "source port", | |
1697 | &ofpact_put_SET_L4_SRC_PORT(ofpacts)->port); | |
1698 | } | |
d01c980f | 1699 | |
cab50449 | 1700 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1701 | parse_SET_L4_DST_PORT(char *arg, struct ofpbuf *ofpacts, |
1702 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1703 | { | |
1704 | return str_to_u16(arg, "destination port", | |
1705 | &ofpact_put_SET_L4_DST_PORT(ofpacts)->port); | |
1706 | } | |
d01c980f | 1707 | |
c2d936a4 BP |
1708 | static void |
1709 | format_SET_L4_SRC_PORT(const struct ofpact_l4_port *a, struct ds *s) | |
1710 | { | |
1711 | ds_put_format(s, "mod_tp_src:%d", a->port); | |
1712 | } | |
d01c980f | 1713 | |
c2d936a4 BP |
1714 | static void |
1715 | format_SET_L4_DST_PORT(const struct ofpact_l4_port *a, struct ds *s) | |
1716 | { | |
1717 | ds_put_format(s, "mod_tp_dst:%d", a->port); | |
1718 | } | |
1719 | \f | |
73178f20 BP |
1720 | /* Action structure for OFPAT_COPY_FIELD. */ |
1721 | struct ofp15_action_copy_field { | |
1722 | ovs_be16 type; /* OFPAT_COPY_FIELD. */ | |
1723 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
1724 | ovs_be16 n_bits; /* Number of bits to copy. */ | |
1725 | ovs_be16 src_offset; /* Starting bit offset in source. */ | |
1726 | ovs_be16 dst_offset; /* Starting bit offset in destination. */ | |
650763d8 | 1727 | uint8_t pad[2]; |
f13cdd73 BP |
1728 | /* Followed by: |
1729 | * - OXM header for source field. | |
1730 | * - OXM header for destination field. | |
1731 | * - Padding with 0-bytes to a multiple of 8 bytes. | |
650763d8 BP |
1732 | * The "pad2" member is the beginning of the above. */ |
1733 | uint8_t pad2[4]; | |
73178f20 | 1734 | }; |
f13cdd73 | 1735 | OFP_ASSERT(sizeof(struct ofp15_action_copy_field) == 16); |
73178f20 | 1736 | |
914624f8 BP |
1737 | /* Action structure for OpenFlow 1.3 extension copy-field action.. */ |
1738 | struct onf_action_copy_field { | |
1739 | ovs_be16 type; /* OFPAT_EXPERIMENTER. */ | |
1740 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
1741 | ovs_be32 experimenter; /* ONF_VENDOR_ID. */ | |
1742 | ovs_be16 exp_type; /* 3200. */ | |
1743 | uint8_t pad[2]; /* Not used. */ | |
1744 | ovs_be16 n_bits; /* Number of bits to copy. */ | |
1745 | ovs_be16 src_offset; /* Starting bit offset in source. */ | |
1746 | ovs_be16 dst_offset; /* Starting bit offset in destination. */ | |
1747 | uint8_t pad2[2]; /* Not used. */ | |
1748 | /* Followed by: | |
1749 | * - OXM header for source field. | |
1750 | * - OXM header for destination field. | |
1751 | * - Padding with 0-bytes (either 0 or 4 of them) to a multiple of 8 bytes. | |
1752 | * The "pad3" member is the beginning of the above. */ | |
1753 | uint8_t pad3[4]; /* Not used. */ | |
1754 | }; | |
1755 | OFP_ASSERT(sizeof(struct onf_action_copy_field) == 24); | |
1756 | ||
c2d936a4 BP |
1757 | /* Action structure for NXAST_REG_MOVE. |
1758 | * | |
1759 | * Copies src[src_ofs:src_ofs+n_bits] to dst[dst_ofs:dst_ofs+n_bits], where | |
1760 | * a[b:c] denotes the bits within 'a' numbered 'b' through 'c' (not including | |
1761 | * bit 'c'). Bit numbering starts at 0 for the least-significant bit, 1 for | |
1762 | * the next most significant bit, and so on. | |
1763 | * | |
1764 | * 'src' and 'dst' are nxm_header values with nxm_hasmask=0. (It doesn't make | |
1765 | * sense to use nxm_hasmask=1 because the action does not do any kind of | |
1766 | * matching; it uses the actual value of a field.) | |
1767 | * | |
1768 | * The following nxm_header values are potentially acceptable as 'src': | |
1769 | * | |
1770 | * - NXM_OF_IN_PORT | |
1771 | * - NXM_OF_ETH_DST | |
1772 | * - NXM_OF_ETH_SRC | |
1773 | * - NXM_OF_ETH_TYPE | |
1774 | * - NXM_OF_VLAN_TCI | |
1775 | * - NXM_OF_IP_TOS | |
1776 | * - NXM_OF_IP_PROTO | |
1777 | * - NXM_OF_IP_SRC | |
1778 | * - NXM_OF_IP_DST | |
1779 | * - NXM_OF_TCP_SRC | |
1780 | * - NXM_OF_TCP_DST | |
1781 | * - NXM_OF_UDP_SRC | |
1782 | * - NXM_OF_UDP_DST | |
1783 | * - NXM_OF_ICMP_TYPE | |
1784 | * - NXM_OF_ICMP_CODE | |
1785 | * - NXM_OF_ARP_OP | |
1786 | * - NXM_OF_ARP_SPA | |
1787 | * - NXM_OF_ARP_TPA | |
1788 | * - NXM_NX_TUN_ID | |
1789 | * - NXM_NX_ARP_SHA | |
1790 | * - NXM_NX_ARP_THA | |
1791 | * - NXM_NX_ICMPV6_TYPE | |
1792 | * - NXM_NX_ICMPV6_CODE | |
1793 | * - NXM_NX_ND_SLL | |
1794 | * - NXM_NX_ND_TLL | |
1795 | * - NXM_NX_REG(idx) for idx in the switch's accepted range. | |
1796 | * - NXM_NX_PKT_MARK | |
1797 | * - NXM_NX_TUN_IPV4_SRC | |
1798 | * - NXM_NX_TUN_IPV4_DST | |
1799 | * | |
1800 | * The following nxm_header values are potentially acceptable as 'dst': | |
1801 | * | |
1802 | * - NXM_OF_ETH_DST | |
1803 | * - NXM_OF_ETH_SRC | |
1804 | * - NXM_OF_IP_TOS | |
1805 | * - NXM_OF_IP_SRC | |
1806 | * - NXM_OF_IP_DST | |
1807 | * - NXM_OF_TCP_SRC | |
1808 | * - NXM_OF_TCP_DST | |
1809 | * - NXM_OF_UDP_SRC | |
1810 | * - NXM_OF_UDP_DST | |
1811 | * - NXM_NX_ARP_SHA | |
1812 | * - NXM_NX_ARP_THA | |
1813 | * - NXM_OF_ARP_OP | |
1814 | * - NXM_OF_ARP_SPA | |
1815 | * - NXM_OF_ARP_TPA | |
1816 | * Modifying any of the above fields changes the corresponding packet | |
1817 | * header. | |
1818 | * | |
1819 | * - NXM_OF_IN_PORT | |
1820 | * | |
1821 | * - NXM_NX_REG(idx) for idx in the switch's accepted range. | |
1822 | * | |
1823 | * - NXM_NX_PKT_MARK | |
1824 | * | |
1825 | * - NXM_OF_VLAN_TCI. Modifying this field's value has side effects on the | |
1826 | * packet's 802.1Q header. Setting a value with CFI=0 removes the 802.1Q | |
1827 | * header (if any), ignoring the other bits. Setting a value with CFI=1 | |
1828 | * adds or modifies the 802.1Q header appropriately, setting the TCI field | |
1829 | * to the field's new value (with the CFI bit masked out). | |
1830 | * | |
1831 | * - NXM_NX_TUN_ID, NXM_NX_TUN_IPV4_SRC, NXM_NX_TUN_IPV4_DST. Modifying | |
1832 | * any of these values modifies the corresponding tunnel header field used | |
1833 | * for the packet's next tunnel encapsulation, if allowed by the | |
1834 | * configuration of the output tunnel port. | |
1835 | * | |
1836 | * A given nxm_header value may be used as 'src' or 'dst' only on a flow whose | |
1837 | * nx_match satisfies its prerequisites. For example, NXM_OF_IP_TOS may be | |
1838 | * used only if the flow's nx_match includes an nxm_entry that specifies | |
1839 | * nxm_type=NXM_OF_ETH_TYPE, nxm_hasmask=0, and nxm_value=0x0800. | |
1840 | * | |
1841 | * The switch will reject actions for which src_ofs+n_bits is greater than the | |
1842 | * width of 'src' or dst_ofs+n_bits is greater than the width of 'dst' with | |
1843 | * error type OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT. | |
1844 | * | |
1845 | * This action behaves properly when 'src' overlaps with 'dst', that is, it | |
1846 | * behaves as if 'src' were copied out to a temporary buffer, then the | |
1847 | * temporary buffer copied to 'dst'. | |
1848 | */ | |
1849 | struct nx_action_reg_move { | |
1850 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
1851 | ovs_be16 len; /* Length is 24. */ | |
1852 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
1853 | ovs_be16 subtype; /* NXAST_REG_MOVE. */ | |
1854 | ovs_be16 n_bits; /* Number of bits. */ | |
1855 | ovs_be16 src_ofs; /* Starting bit offset in source. */ | |
1856 | ovs_be16 dst_ofs; /* Starting bit offset in destination. */ | |
bad8a439 BP |
1857 | /* Followed by: |
1858 | * - OXM/NXM header for source field (4 or 8 bytes). | |
1859 | * - OXM/NXM header for destination field (4 or 8 bytes). | |
1860 | * - Padding with 0-bytes to a multiple of 8 bytes, if necessary. */ | |
c2d936a4 | 1861 | }; |
bad8a439 | 1862 | OFP_ASSERT(sizeof(struct nx_action_reg_move) == 16); |
ff14eb7a | 1863 | |
73178f20 | 1864 | static enum ofperr |
914624f8 BP |
1865 | decode_copy_field__(ovs_be16 src_offset, ovs_be16 dst_offset, ovs_be16 n_bits, |
1866 | const void *action, ovs_be16 action_len, size_t oxm_offset, | |
1867 | struct ofpbuf *ofpacts) | |
73178f20 BP |
1868 | { |
1869 | struct ofpact_reg_move *move; | |
f13cdd73 | 1870 | enum ofperr error; |
f13cdd73 | 1871 | struct ofpbuf b; |
73178f20 BP |
1872 | |
1873 | move = ofpact_put_REG_MOVE(ofpacts); | |
914624f8 BP |
1874 | move->ofpact.raw = ONFACT_RAW13_COPY_FIELD; |
1875 | move->src.ofs = ntohs(src_offset); | |
1876 | move->src.n_bits = ntohs(n_bits); | |
1877 | move->dst.ofs = ntohs(dst_offset); | |
1878 | move->dst.n_bits = ntohs(n_bits); | |
1879 | ||
1880 | ofpbuf_use_const(&b, action, ntohs(action_len)); | |
1881 | ofpbuf_pull(&b, oxm_offset); | |
f13cdd73 BP |
1882 | error = nx_pull_header(&b, &move->src.field, NULL); |
1883 | if (error) { | |
1884 | return error; | |
1885 | } | |
1886 | error = nx_pull_header(&b, &move->dst.field, NULL); | |
1887 | if (error) { | |
1888 | return error; | |
1889 | } | |
f13cdd73 | 1890 | |
6fd6ed71 | 1891 | if (!is_all_zeros(b.data, b.size)) { |
f13cdd73 BP |
1892 | return OFPERR_NXBRC_MUST_BE_ZERO; |
1893 | } | |
1894 | ||
73178f20 BP |
1895 | return nxm_reg_move_check(move, NULL); |
1896 | } | |
1897 | ||
914624f8 BP |
1898 | static enum ofperr |
1899 | decode_OFPAT_RAW15_COPY_FIELD(const struct ofp15_action_copy_field *oacf, | |
1900 | struct ofpbuf *ofpacts) | |
1901 | { | |
1902 | return decode_copy_field__(oacf->src_offset, oacf->dst_offset, | |
1903 | oacf->n_bits, oacf, oacf->len, | |
1904 | OBJECT_OFFSETOF(oacf, pad2), ofpacts); | |
1905 | } | |
1906 | ||
1907 | static enum ofperr | |
1908 | decode_ONFACT_RAW13_COPY_FIELD(const struct onf_action_copy_field *oacf, | |
1909 | struct ofpbuf *ofpacts) | |
1910 | { | |
1911 | return decode_copy_field__(oacf->src_offset, oacf->dst_offset, | |
1912 | oacf->n_bits, oacf, oacf->len, | |
1913 | OBJECT_OFFSETOF(oacf, pad3), ofpacts); | |
1914 | } | |
1915 | ||
c2d936a4 BP |
1916 | static enum ofperr |
1917 | decode_NXAST_RAW_REG_MOVE(const struct nx_action_reg_move *narm, | |
1918 | struct ofpbuf *ofpacts) | |
1919 | { | |
1920 | struct ofpact_reg_move *move; | |
bad8a439 BP |
1921 | enum ofperr error; |
1922 | struct ofpbuf b; | |
0c20dbe4 | 1923 | |
c2d936a4 | 1924 | move = ofpact_put_REG_MOVE(ofpacts); |
914624f8 | 1925 | move->ofpact.raw = NXAST_RAW_REG_MOVE; |
c2d936a4 BP |
1926 | move->src.ofs = ntohs(narm->src_ofs); |
1927 | move->src.n_bits = ntohs(narm->n_bits); | |
c2d936a4 BP |
1928 | move->dst.ofs = ntohs(narm->dst_ofs); |
1929 | move->dst.n_bits = ntohs(narm->n_bits); | |
d01c980f | 1930 | |
bad8a439 BP |
1931 | ofpbuf_use_const(&b, narm, ntohs(narm->len)); |
1932 | ofpbuf_pull(&b, sizeof *narm); | |
1933 | error = nx_pull_header(&b, &move->src.field, NULL); | |
1934 | if (error) { | |
1935 | return error; | |
1936 | } | |
1937 | error = nx_pull_header(&b, &move->dst.field, NULL); | |
1938 | if (error) { | |
1939 | return error; | |
1940 | } | |
6fd6ed71 | 1941 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
1942 | return OFPERR_NXBRC_MUST_BE_ZERO; |
1943 | } | |
1944 | ||
c2d936a4 BP |
1945 | return nxm_reg_move_check(move, NULL); |
1946 | } | |
d01c980f | 1947 | |
c2d936a4 BP |
1948 | static void |
1949 | encode_REG_MOVE(const struct ofpact_reg_move *move, | |
73178f20 BP |
1950 | enum ofp_version ofp_version, struct ofpbuf *out) |
1951 | { | |
914624f8 BP |
1952 | /* For OpenFlow 1.3, the choice of ONFACT_RAW13_COPY_FIELD versus |
1953 | * NXAST_RAW_REG_MOVE is somewhat difficult. Neither one is guaranteed to | |
1954 | * be supported by every OpenFlow 1.3 implementation. It would be ideal to | |
1955 | * probe for support. Until we have that ability, we currently prefer | |
1956 | * NXAST_RAW_REG_MOVE for backward compatibility with older Open vSwitch | |
1957 | * versions. */ | |
6fd6ed71 | 1958 | size_t start_ofs = out->size; |
73178f20 | 1959 | if (ofp_version >= OFP15_VERSION) { |
bad8a439 | 1960 | struct ofp15_action_copy_field *copy = put_OFPAT15_COPY_FIELD(out); |
73178f20 BP |
1961 | copy->n_bits = htons(move->dst.n_bits); |
1962 | copy->src_offset = htons(move->src.ofs); | |
1963 | copy->dst_offset = htons(move->dst.ofs); | |
6fd6ed71 | 1964 | out->size = out->size - sizeof copy->pad2; |
f13cdd73 BP |
1965 | nx_put_header(out, move->src.field->id, ofp_version, false); |
1966 | nx_put_header(out, move->dst.field->id, ofp_version, false); | |
914624f8 BP |
1967 | } else if (ofp_version == OFP13_VERSION |
1968 | && move->ofpact.raw == ONFACT_RAW13_COPY_FIELD) { | |
1969 | struct onf_action_copy_field *copy = put_ONFACT13_COPY_FIELD(out); | |
1970 | copy->n_bits = htons(move->dst.n_bits); | |
1971 | copy->src_offset = htons(move->src.ofs); | |
1972 | copy->dst_offset = htons(move->dst.ofs); | |
6fd6ed71 | 1973 | out->size = out->size - sizeof copy->pad3; |
914624f8 BP |
1974 | nx_put_header(out, move->src.field->id, ofp_version, false); |
1975 | nx_put_header(out, move->dst.field->id, ofp_version, false); | |
73178f20 | 1976 | } else { |
bad8a439 | 1977 | struct nx_action_reg_move *narm = put_NXAST_REG_MOVE(out); |
73178f20 BP |
1978 | narm->n_bits = htons(move->dst.n_bits); |
1979 | narm->src_ofs = htons(move->src.ofs); | |
1980 | narm->dst_ofs = htons(move->dst.ofs); | |
bad8a439 BP |
1981 | nx_put_header(out, move->src.field->id, 0, false); |
1982 | nx_put_header(out, move->dst.field->id, 0, false); | |
73178f20 | 1983 | } |
bad8a439 | 1984 | pad_ofpat(out, start_ofs); |
c2d936a4 | 1985 | } |
e9536ecb | 1986 | |
cab50449 | 1987 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
1988 | parse_REG_MOVE(const char *arg, struct ofpbuf *ofpacts, |
1989 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
1990 | { | |
1991 | struct ofpact_reg_move *move = ofpact_put_REG_MOVE(ofpacts); | |
1992 | const char *full_arg = arg; | |
1993 | char *error; | |
097d4939 | 1994 | |
c2d936a4 BP |
1995 | error = mf_parse_subfield__(&move->src, &arg); |
1996 | if (error) { | |
1997 | return error; | |
1998 | } | |
1999 | if (strncmp(arg, "->", 2)) { | |
2000 | return xasprintf("%s: missing `->' following source", full_arg); | |
2001 | } | |
2002 | arg += 2; | |
2003 | error = mf_parse_subfield(&move->dst, arg); | |
2004 | if (error) { | |
2005 | return error; | |
2006 | } | |
097d4939 | 2007 | |
c2d936a4 BP |
2008 | if (move->src.n_bits != move->dst.n_bits) { |
2009 | return xasprintf("%s: source field is %d bits wide but destination is " | |
2010 | "%d bits wide", full_arg, | |
2011 | move->src.n_bits, move->dst.n_bits); | |
2012 | } | |
2013 | return NULL; | |
2014 | } | |
0f3f3c3d | 2015 | |
c2d936a4 BP |
2016 | static void |
2017 | format_REG_MOVE(const struct ofpact_reg_move *a, struct ds *s) | |
2018 | { | |
2019 | nxm_format_reg_move(a, s); | |
2020 | } | |
2021 | \f | |
7eb4b1f1 BP |
2022 | /* Action structure for OFPAT12_SET_FIELD. */ |
2023 | struct ofp12_action_set_field { | |
2024 | ovs_be16 type; /* OFPAT12_SET_FIELD. */ | |
2025 | ovs_be16 len; /* Length is padded to 64 bits. */ | |
2026 | ||
2027 | /* Followed by: | |
2028 | * - An OXM header, value, and (in OpenFlow 1.5+) optionally a mask. | |
2029 | * - Enough 0-bytes to pad out to a multiple of 64 bits. | |
2030 | * | |
2031 | * The "pad" member is the beginning of the above. */ | |
2032 | uint8_t pad[4]; | |
2033 | }; | |
2034 | OFP_ASSERT(sizeof(struct ofp12_action_set_field) == 8); | |
2035 | ||
c2d936a4 BP |
2036 | /* Action structure for NXAST_REG_LOAD. |
2037 | * | |
2038 | * Copies value[0:n_bits] to dst[ofs:ofs+n_bits], where a[b:c] denotes the bits | |
2039 | * within 'a' numbered 'b' through 'c' (not including bit 'c'). Bit numbering | |
2040 | * starts at 0 for the least-significant bit, 1 for the next most significant | |
2041 | * bit, and so on. | |
2042 | * | |
2043 | * 'dst' is an nxm_header with nxm_hasmask=0. See the documentation for | |
2044 | * NXAST_REG_MOVE, above, for the permitted fields and for the side effects of | |
2045 | * loading them. | |
2046 | * | |
2047 | * The 'ofs' and 'n_bits' fields are combined into a single 'ofs_nbits' field | |
2048 | * to avoid enlarging the structure by another 8 bytes. To allow 'n_bits' to | |
2049 | * take a value between 1 and 64 (inclusive) while taking up only 6 bits, it is | |
2050 | * also stored as one less than its true value: | |
2051 | * | |
2052 | * 15 6 5 0 | |
2053 | * +------------------------------+------------------+ | |
2054 | * | ofs | n_bits - 1 | | |
2055 | * +------------------------------+------------------+ | |
2056 | * | |
2057 | * The switch will reject actions for which ofs+n_bits is greater than the | |
2058 | * width of 'dst', or in which any bits in 'value' with value 2**n_bits or | |
2059 | * greater are set to 1, with error type OFPET_BAD_ACTION, code | |
2060 | * OFPBAC_BAD_ARGUMENT. | |
2061 | */ | |
2062 | struct nx_action_reg_load { | |
2063 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2064 | ovs_be16 len; /* Length is 24. */ | |
2065 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2066 | ovs_be16 subtype; /* NXAST_REG_LOAD. */ | |
2067 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
2068 | ovs_be32 dst; /* Destination register. */ | |
2069 | ovs_be64 value; /* Immediate value. */ | |
2070 | }; | |
2071 | OFP_ASSERT(sizeof(struct nx_action_reg_load) == 24); | |
b676167a | 2072 | |
bad8a439 BP |
2073 | /* Action structure for NXAST_REG_LOAD2. |
2074 | * | |
2075 | * Compared to OFPAT_SET_FIELD, we can use this to set whole or partial fields | |
2076 | * in any OpenFlow version. Compared to NXAST_REG_LOAD, we can use this to set | |
2077 | * OXM experimenter fields. */ | |
2078 | struct nx_action_reg_load2 { | |
2079 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2080 | ovs_be16 len; /* At least 16. */ | |
2081 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2082 | ovs_be16 subtype; /* NXAST_SET_FIELD. */ | |
2083 | ||
2084 | /* Followed by: | |
2085 | * - An NXM/OXM header, value, and optionally a mask. | |
2086 | * - Enough 0-bytes to pad out to a multiple of 64 bits. | |
2087 | * | |
2088 | * The "pad" member is the beginning of the above. */ | |
2089 | uint8_t pad[6]; | |
2090 | }; | |
2091 | OFP_ASSERT(sizeof(struct nx_action_reg_load2) == 16); | |
2092 | ||
c2d936a4 | 2093 | static enum ofperr |
7eb4b1f1 BP |
2094 | decode_ofpat_set_field(const struct ofp12_action_set_field *oasf, |
2095 | bool may_mask, struct ofpbuf *ofpacts) | |
7fdb60a7 | 2096 | { |
c2d936a4 | 2097 | struct ofpact_set_field *sf; |
178742f9 BP |
2098 | enum ofperr error; |
2099 | struct ofpbuf b; | |
7fdb60a7 | 2100 | |
178742f9 BP |
2101 | sf = ofpact_put_SET_FIELD(ofpacts); |
2102 | ||
2103 | ofpbuf_use_const(&b, oasf, ntohs(oasf->len)); | |
7eb4b1f1 BP |
2104 | ofpbuf_pull(&b, OBJECT_OFFSETOF(oasf, pad)); |
2105 | error = nx_pull_entry(&b, &sf->field, &sf->value, | |
2106 | may_mask ? &sf->mask : NULL); | |
178742f9 | 2107 | if (error) { |
178742f9 BP |
2108 | return (error == OFPERR_OFPBMC_BAD_MASK |
2109 | ? OFPERR_OFPBAC_BAD_SET_MASK | |
2110 | : error); | |
c2d936a4 | 2111 | } |
7eb4b1f1 BP |
2112 | if (!may_mask) { |
2113 | memset(&sf->mask, 0xff, sf->field->n_bytes); | |
2114 | } | |
178742f9 | 2115 | |
6fd6ed71 | 2116 | if (!is_all_zeros(b.data, b.size)) { |
c2d936a4 BP |
2117 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2118 | } | |
7fdb60a7 | 2119 | |
178742f9 BP |
2120 | /* OpenFlow says specifically that one may not set OXM_OF_IN_PORT via |
2121 | * Set-Field. */ | |
2122 | if (sf->field->id == MFF_IN_PORT_OXM) { | |
2123 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
c2d936a4 | 2124 | } |
178742f9 | 2125 | |
c2d936a4 | 2126 | /* oxm_length is now validated to be compatible with mf_value. */ |
178742f9 BP |
2127 | if (!sf->field->writable) { |
2128 | VLOG_WARN_RL(&rl, "destination field %s is not writable", | |
2129 | sf->field->name); | |
c2d936a4 BP |
2130 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2131 | } | |
c2d936a4 | 2132 | |
d3cb080e | 2133 | /* The value must be valid for match. OpenFlow 1.5 also says, |
7eb4b1f1 BP |
2134 | * "In an OXM_OF_VLAN_VID set-field action, the OFPVID_PRESENT bit must be |
2135 | * a 1-bit in oxm_value and in oxm_mask." */ | |
178742f9 BP |
2136 | if (!mf_is_value_valid(sf->field, &sf->value) |
2137 | || (sf->field->id == MFF_VLAN_VID | |
31c9ed6c BP |
2138 | && (!(sf->mask.be16 & htons(OFPVID12_PRESENT)) |
2139 | || !(sf->value.be16 & htons(OFPVID12_PRESENT))))) { | |
c2d936a4 | 2140 | struct ds ds = DS_EMPTY_INITIALIZER; |
178742f9 | 2141 | mf_format(sf->field, &sf->value, NULL, &ds); |
c2d936a4 | 2142 | VLOG_WARN_RL(&rl, "Invalid value for set field %s: %s", |
178742f9 | 2143 | sf->field->name, ds_cstr(&ds)); |
c2d936a4 BP |
2144 | ds_destroy(&ds); |
2145 | ||
2146 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
7fdb60a7 | 2147 | } |
c2d936a4 | 2148 | return 0; |
7fdb60a7 SH |
2149 | } |
2150 | ||
7eb4b1f1 BP |
2151 | static enum ofperr |
2152 | decode_OFPAT_RAW12_SET_FIELD(const struct ofp12_action_set_field *oasf, | |
2153 | struct ofpbuf *ofpacts) | |
2154 | { | |
2155 | return decode_ofpat_set_field(oasf, false, ofpacts); | |
2156 | } | |
2157 | ||
2158 | static enum ofperr | |
2159 | decode_OFPAT_RAW15_SET_FIELD(const struct ofp12_action_set_field *oasf, | |
2160 | struct ofpbuf *ofpacts) | |
2161 | { | |
2162 | return decode_ofpat_set_field(oasf, true, ofpacts); | |
2163 | } | |
2164 | ||
2165 | static enum ofperr | |
2166 | decode_NXAST_RAW_REG_LOAD(const struct nx_action_reg_load *narl, | |
2167 | struct ofpbuf *out) | |
2168 | { | |
2169 | struct ofpact_set_field *sf = ofpact_put_reg_load(out); | |
2170 | struct mf_subfield dst; | |
2171 | enum ofperr error; | |
2172 | ||
2173 | sf->ofpact.raw = NXAST_RAW_REG_LOAD; | |
2174 | ||
2175 | dst.field = mf_from_nxm_header(ntohl(narl->dst)); | |
2176 | dst.ofs = nxm_decode_ofs(narl->ofs_nbits); | |
2177 | dst.n_bits = nxm_decode_n_bits(narl->ofs_nbits); | |
2178 | error = mf_check_dst(&dst, NULL); | |
2179 | if (error) { | |
2180 | return error; | |
2181 | } | |
2182 | ||
2183 | /* Reject 'narl' if a bit numbered 'n_bits' or higher is set to 1 in | |
2184 | * narl->value. */ | |
2185 | if (dst.n_bits < 64 && ntohll(narl->value) >> dst.n_bits) { | |
2186 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
2187 | } | |
2188 | ||
2189 | sf->field = dst.field; | |
2190 | bitwise_put(ntohll(narl->value), | |
2191 | &sf->value, dst.field->n_bytes, dst.ofs, | |
2192 | dst.n_bits); | |
2193 | bitwise_put(UINT64_MAX, | |
2194 | &sf->mask, dst.field->n_bytes, dst.ofs, | |
2195 | dst.n_bits); | |
2196 | ||
2197 | return 0; | |
2198 | } | |
2199 | ||
bad8a439 BP |
2200 | static enum ofperr |
2201 | decode_NXAST_RAW_REG_LOAD2(const struct nx_action_reg_load2 *narl, | |
2202 | struct ofpbuf *out) | |
2203 | { | |
2204 | struct ofpact_set_field *sf; | |
2205 | enum ofperr error; | |
2206 | struct ofpbuf b; | |
2207 | ||
2208 | sf = ofpact_put_SET_FIELD(out); | |
2209 | sf->ofpact.raw = NXAST_RAW_REG_LOAD2; | |
2210 | ||
2211 | ofpbuf_use_const(&b, narl, ntohs(narl->len)); | |
2212 | ofpbuf_pull(&b, OBJECT_OFFSETOF(narl, pad)); | |
2213 | error = nx_pull_entry(&b, &sf->field, &sf->value, &sf->mask); | |
2214 | if (error) { | |
2215 | return error; | |
2216 | } | |
6fd6ed71 | 2217 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2218 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; |
2219 | } | |
2220 | ||
2221 | if (!sf->field->writable) { | |
2222 | VLOG_WARN_RL(&rl, "destination field %s is not writable", | |
2223 | sf->field->name); | |
2224 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
2225 | } | |
2226 | return 0; | |
2227 | } | |
2228 | ||
7fdb60a7 | 2229 | static void |
c2d936a4 | 2230 | ofpact_put_set_field(struct ofpbuf *openflow, enum ofp_version ofp_version, |
178742f9 | 2231 | enum mf_field_id field, uint64_t value_) |
7fdb60a7 | 2232 | { |
7eb4b1f1 | 2233 | struct ofp12_action_set_field *oasf OVS_UNUSED; |
178742f9 | 2234 | int n_bytes = mf_from_id(field)->n_bytes; |
6fd6ed71 | 2235 | size_t start_ofs = openflow->size; |
178742f9 | 2236 | union mf_value value; |
7fdb60a7 | 2237 | |
178742f9 | 2238 | value.be64 = htonll(value_ << (8 * (8 - n_bytes))); |
7fdb60a7 | 2239 | |
7eb4b1f1 | 2240 | oasf = put_OFPAT12_SET_FIELD(openflow); |
6fd6ed71 | 2241 | openflow->size = openflow->size - sizeof oasf->pad; |
178742f9 BP |
2242 | nx_put_entry(openflow, field, ofp_version, &value, NULL); |
2243 | pad_ofpat(openflow, start_ofs); | |
7fdb60a7 SH |
2244 | } |
2245 | ||
7eb4b1f1 BP |
2246 | static bool |
2247 | next_load_segment(const struct ofpact_set_field *sf, | |
2248 | struct mf_subfield *dst, uint64_t *value) | |
2249 | { | |
fa078489 BP |
2250 | int n_bits = sf->field->n_bits; |
2251 | int n_bytes = sf->field->n_bytes; | |
7eb4b1f1 BP |
2252 | int start = dst->ofs + dst->n_bits; |
2253 | ||
fa078489 | 2254 | if (start < n_bits) { |
7eb4b1f1 | 2255 | dst->field = sf->field; |
fa078489 BP |
2256 | dst->ofs = bitwise_scan(&sf->mask, n_bytes, 1, start, n_bits); |
2257 | if (dst->ofs < n_bits) { | |
2258 | dst->n_bits = bitwise_scan(&sf->mask, n_bytes, 0, dst->ofs + 1, | |
2259 | MIN(dst->ofs + 64, n_bits)) - dst->ofs; | |
2260 | *value = bitwise_get(&sf->value, n_bytes, dst->ofs, dst->n_bits); | |
7eb4b1f1 BP |
2261 | return true; |
2262 | } | |
2263 | } | |
2264 | return false; | |
2265 | } | |
178742f9 | 2266 | |
7eb4b1f1 | 2267 | /* Convert 'sf' to a series of REG_LOADs. */ |
7fdb60a7 | 2268 | static void |
c2d936a4 | 2269 | set_field_to_nxast(const struct ofpact_set_field *sf, struct ofpbuf *openflow) |
7fdb60a7 | 2270 | { |
bad8a439 | 2271 | /* If 'sf' cannot be encoded as NXAST_REG_LOAD because it requires an |
4fe04a7e JG |
2272 | * experimenter OXM or is variable length (or if it came in as |
2273 | * NXAST_REG_LOAD2), encode as NXAST_REG_LOAD2. Otherwise use | |
2274 | * NXAST_REG_LOAD, which is backward compatible. */ | |
bad8a439 | 2275 | if (sf->ofpact.raw == NXAST_RAW_REG_LOAD2 |
4fe04a7e | 2276 | || !mf_nxm_header(sf->field->id) || sf->field->variable_len) { |
bad8a439 | 2277 | struct nx_action_reg_load2 *narl OVS_UNUSED; |
6fd6ed71 | 2278 | size_t start_ofs = openflow->size; |
bad8a439 BP |
2279 | |
2280 | narl = put_NXAST_REG_LOAD2(openflow); | |
6fd6ed71 | 2281 | openflow->size = openflow->size - sizeof narl->pad; |
bad8a439 BP |
2282 | nx_put_entry(openflow, sf->field->id, 0, &sf->value, &sf->mask); |
2283 | pad_ofpat(openflow, start_ofs); | |
2284 | } else { | |
2285 | struct mf_subfield dst; | |
2286 | uint64_t value; | |
7eb4b1f1 | 2287 | |
bad8a439 BP |
2288 | dst.ofs = dst.n_bits = 0; |
2289 | while (next_load_segment(sf, &dst, &value)) { | |
2290 | struct nx_action_reg_load *narl = put_NXAST_REG_LOAD(openflow); | |
2291 | narl->ofs_nbits = nxm_encode_ofs_nbits(dst.ofs, dst.n_bits); | |
2292 | narl->dst = htonl(mf_nxm_header(dst.field->id)); | |
2293 | narl->value = htonll(value); | |
2294 | } | |
7fdb60a7 SH |
2295 | } |
2296 | } | |
2297 | ||
7eb4b1f1 BP |
2298 | /* Convert 'sf', which must set an entire field, to standard OpenFlow 1.0/1.1 |
2299 | * actions, if we can, falling back to Nicira extensions if we must. | |
7fdb60a7 | 2300 | * |
c2d936a4 BP |
2301 | * We check only meta-flow types that can appear within set field actions and |
2302 | * that have a mapping to compatible action types. These struct mf_field | |
2303 | * definitions have a defined OXM or NXM header value and specify the field as | |
2304 | * writable. */ | |
2305 | static void | |
2306 | set_field_to_legacy_openflow(const struct ofpact_set_field *sf, | |
2307 | enum ofp_version ofp_version, | |
2308 | struct ofpbuf *out) | |
7fdb60a7 | 2309 | { |
c2d936a4 BP |
2310 | switch ((int) sf->field->id) { |
2311 | case MFF_VLAN_TCI: { | |
2312 | ovs_be16 tci = sf->value.be16; | |
2313 | bool cfi = (tci & htons(VLAN_CFI)) != 0; | |
2314 | uint16_t vid = vlan_tci_to_vid(tci); | |
2315 | uint8_t pcp = vlan_tci_to_pcp(tci); | |
2316 | ||
2317 | if (ofp_version < OFP11_VERSION) { | |
2318 | /* NXM_OF_VLAN_TCI to OpenFlow 1.0 mapping: | |
2319 | * | |
2320 | * If CFI=1, Add or modify VLAN VID & PCP. | |
2321 | * If CFI=0, strip VLAN header, if any. | |
2322 | */ | |
2323 | if (cfi) { | |
2324 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
2325 | put_OFPAT10_SET_VLAN_PCP(out, pcp); | |
2326 | } else { | |
2327 | put_OFPAT10_STRIP_VLAN(out); | |
2328 | } | |
2329 | } else { | |
2330 | /* NXM_OF_VLAN_TCI to OpenFlow 1.1 mapping: | |
2331 | * | |
2332 | * If CFI=1, Add or modify VLAN VID & PCP. | |
2333 | * OpenFlow 1.1 set actions only apply if the packet | |
2334 | * already has VLAN tags. To be sure that is the case | |
2335 | * we have to push a VLAN header. As we do not support | |
2336 | * multiple layers of VLANs, this is a no-op, if a VLAN | |
2337 | * header already exists. This may backfire, however, | |
2338 | * when we start supporting multiple layers of VLANs. | |
2339 | * If CFI=0, strip VLAN header, if any. | |
2340 | */ | |
2341 | if (cfi) { | |
2342 | /* Push a VLAN tag, if one was not seen at action validation | |
2343 | * time. */ | |
2344 | if (!sf->flow_has_vlan) { | |
2345 | put_OFPAT11_PUSH_VLAN(out, htons(ETH_TYPE_VLAN_8021Q)); | |
2346 | } | |
2347 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
2348 | put_OFPAT11_SET_VLAN_PCP(out, pcp); | |
2349 | } else { | |
2350 | /* If the flow did not match on vlan, we have no way of | |
2351 | * knowing if the vlan tag exists, so we must POP just to be | |
2352 | * sure. */ | |
2353 | put_OFPAT11_POP_VLAN(out); | |
2354 | } | |
2355 | } | |
2356 | break; | |
2357 | } | |
7fdb60a7 | 2358 | |
c2d936a4 BP |
2359 | case MFF_VLAN_VID: { |
2360 | uint16_t vid = ntohs(sf->value.be16) & VLAN_VID_MASK; | |
2361 | if (ofp_version == OFP10_VERSION) { | |
2362 | put_OFPAT10_SET_VLAN_VID(out, vid); | |
2363 | } else { | |
2364 | put_OFPAT11_SET_VLAN_VID(out, vid); | |
2365 | } | |
2366 | break; | |
2367 | } | |
2368 | ||
2369 | case MFF_VLAN_PCP: | |
2370 | if (ofp_version == OFP10_VERSION) { | |
2371 | put_OFPAT10_SET_VLAN_PCP(out, sf->value.u8); | |
2372 | } else { | |
2373 | put_OFPAT11_SET_VLAN_PCP(out, sf->value.u8); | |
2374 | } | |
2375 | break; | |
2376 | ||
2377 | case MFF_ETH_SRC: | |
74ff3298 | 2378 | put_OFPAT_SET_DL_SRC(out, ofp_version)->dl_addr = sf->value.mac; |
c2d936a4 BP |
2379 | break; |
2380 | ||
2381 | case MFF_ETH_DST: | |
74ff3298 | 2382 | put_OFPAT_SET_DL_DST(out, ofp_version)->dl_addr = sf->value.mac; |
c2d936a4 BP |
2383 | break; |
2384 | ||
2385 | case MFF_IPV4_SRC: | |
2386 | put_OFPAT_SET_NW_SRC(out, ofp_version, sf->value.be32); | |
2387 | break; | |
2388 | ||
2389 | case MFF_IPV4_DST: | |
2390 | put_OFPAT_SET_NW_DST(out, ofp_version, sf->value.be32); | |
2391 | break; | |
2392 | ||
2393 | case MFF_IP_DSCP: | |
2394 | put_OFPAT_SET_NW_TOS(out, ofp_version, sf->value.u8); | |
2395 | break; | |
2396 | ||
2397 | case MFF_IP_DSCP_SHIFTED: | |
2398 | put_OFPAT_SET_NW_TOS(out, ofp_version, sf->value.u8 << 2); | |
2399 | break; | |
2400 | ||
2401 | case MFF_TCP_SRC: | |
2402 | case MFF_UDP_SRC: | |
2403 | put_OFPAT_SET_TP_SRC(out, sf->value.be16); | |
2404 | break; | |
2405 | ||
2406 | case MFF_TCP_DST: | |
2407 | case MFF_UDP_DST: | |
2408 | put_OFPAT_SET_TP_DST(out, sf->value.be16); | |
2409 | break; | |
2410 | ||
2411 | default: | |
2412 | set_field_to_nxast(sf, out); | |
2413 | break; | |
7fdb60a7 SH |
2414 | } |
2415 | } | |
2416 | ||
7eb4b1f1 BP |
2417 | static void |
2418 | set_field_to_set_field(const struct ofpact_set_field *sf, | |
2419 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2420 | { | |
2421 | struct ofp12_action_set_field *oasf OVS_UNUSED; | |
6fd6ed71 | 2422 | size_t start_ofs = out->size; |
7eb4b1f1 BP |
2423 | |
2424 | oasf = put_OFPAT12_SET_FIELD(out); | |
6fd6ed71 | 2425 | out->size = out->size - sizeof oasf->pad; |
7eb4b1f1 BP |
2426 | nx_put_entry(out, sf->field->id, ofp_version, &sf->value, &sf->mask); |
2427 | pad_ofpat(out, start_ofs); | |
2428 | } | |
2429 | ||
c2d936a4 BP |
2430 | static void |
2431 | encode_SET_FIELD(const struct ofpact_set_field *sf, | |
2432 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2433 | { | |
7eb4b1f1 | 2434 | if (ofp_version >= OFP15_VERSION) { |
bad8a439 BP |
2435 | /* OF1.5+ only has Set-Field (reg_load is redundant so we drop it |
2436 | * entirely). */ | |
7eb4b1f1 | 2437 | set_field_to_set_field(sf, ofp_version, out); |
bad8a439 BP |
2438 | } else if (sf->ofpact.raw == NXAST_RAW_REG_LOAD || |
2439 | sf->ofpact.raw == NXAST_RAW_REG_LOAD2) { | |
2440 | /* It came in as reg_load, send it out the same way. */ | |
7eb4b1f1 BP |
2441 | set_field_to_nxast(sf, out); |
2442 | } else if (ofp_version < OFP12_VERSION) { | |
2443 | /* OpenFlow 1.0 and 1.1 don't have Set-Field. */ | |
c2d936a4 | 2444 | set_field_to_legacy_openflow(sf, ofp_version, out); |
7eb4b1f1 BP |
2445 | } else if (is_all_ones((const uint8_t *) &sf->mask, sf->field->n_bytes)) { |
2446 | /* We're encoding to OpenFlow 1.2, 1.3, or 1.4. The action sets an | |
2447 | * entire field, so encode it as OFPAT_SET_FIELD. */ | |
2448 | set_field_to_set_field(sf, ofp_version, out); | |
c2d936a4 | 2449 | } else { |
7eb4b1f1 BP |
2450 | /* We're encoding to OpenFlow 1.2, 1.3, or 1.4. The action cannot be |
2451 | * encoded as OFPAT_SET_FIELD because it does not set an entire field, | |
2452 | * so encode it as reg_load. */ | |
2453 | set_field_to_nxast(sf, out); | |
c2d936a4 BP |
2454 | } |
2455 | } | |
2456 | ||
2457 | /* Parses a "set_field" action with argument 'arg', appending the parsed | |
2458 | * action to 'ofpacts'. | |
2459 | * | |
2460 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2461 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 2462 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2463 | set_field_parse__(char *arg, struct ofpbuf *ofpacts, |
2464 | enum ofputil_protocol *usable_protocols) | |
7fdb60a7 | 2465 | { |
c2d936a4 BP |
2466 | struct ofpact_set_field *sf = ofpact_put_SET_FIELD(ofpacts); |
2467 | char *value; | |
2468 | char *delim; | |
2469 | char *key; | |
2470 | const struct mf_field *mf; | |
2471 | char *error; | |
7fdb60a7 | 2472 | |
c2d936a4 BP |
2473 | value = arg; |
2474 | delim = strstr(arg, "->"); | |
2475 | if (!delim) { | |
2476 | return xasprintf("%s: missing `->'", arg); | |
2477 | } | |
2478 | if (strlen(delim) <= strlen("->")) { | |
2479 | return xasprintf("%s: missing field name following `->'", arg); | |
2480 | } | |
e3f8f887 | 2481 | |
c2d936a4 BP |
2482 | key = delim + strlen("->"); |
2483 | mf = mf_from_name(key); | |
2484 | if (!mf) { | |
2485 | return xasprintf("%s is not a valid OXM field name", key); | |
2486 | } | |
2487 | if (!mf->writable) { | |
2488 | return xasprintf("%s is read-only", key); | |
2489 | } | |
2490 | sf->field = mf; | |
2491 | delim[0] = '\0'; | |
7eb4b1f1 | 2492 | error = mf_parse(mf, value, &sf->value, &sf->mask); |
7fdb60a7 SH |
2493 | if (error) { |
2494 | return error; | |
2495 | } | |
2496 | ||
c2d936a4 BP |
2497 | if (!mf_is_value_valid(mf, &sf->value)) { |
2498 | return xasprintf("%s is not a valid value for field %s", value, key); | |
7fdb60a7 SH |
2499 | } |
2500 | ||
a4ce8b25 | 2501 | *usable_protocols &= mf->usable_protocols_exact; |
c2d936a4 | 2502 | return NULL; |
7fdb60a7 SH |
2503 | } |
2504 | ||
c2d936a4 BP |
2505 | /* Parses 'arg' as the argument to a "set_field" action, and appends such an |
2506 | * action to 'ofpacts'. | |
2507 | * | |
2508 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2509 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 2510 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2511 | parse_SET_FIELD(const char *arg, struct ofpbuf *ofpacts, |
2512 | enum ofputil_protocol *usable_protocols) | |
2513 | { | |
2514 | char *copy = xstrdup(arg); | |
2515 | char *error = set_field_parse__(copy, ofpacts, usable_protocols); | |
2516 | free(copy); | |
2517 | return error; | |
2518 | } | |
a359d5ad | 2519 | |
cab50449 | 2520 | static char * OVS_WARN_UNUSED_RESULT |
7eb4b1f1 BP |
2521 | parse_reg_load(char *arg, struct ofpbuf *ofpacts) |
2522 | { | |
2523 | struct ofpact_set_field *sf = ofpact_put_reg_load(ofpacts); | |
2524 | const char *full_arg = arg; | |
2525 | uint64_t value = strtoull(arg, (char **) &arg, 0); | |
2526 | struct mf_subfield dst; | |
2527 | char *error; | |
2528 | ||
2529 | if (strncmp(arg, "->", 2)) { | |
2530 | return xasprintf("%s: missing `->' following value", full_arg); | |
2531 | } | |
2532 | arg += 2; | |
2533 | error = mf_parse_subfield(&dst, arg); | |
2534 | if (error) { | |
2535 | return error; | |
2536 | } | |
2537 | ||
2538 | if (dst.n_bits < 64 && (value >> dst.n_bits) != 0) { | |
2539 | return xasprintf("%s: value %"PRIu64" does not fit into %d bits", | |
2540 | full_arg, value, dst.n_bits); | |
2541 | } | |
2542 | ||
2543 | sf->field = dst.field; | |
2544 | memset(&sf->value, 0, sizeof sf->value); | |
2545 | bitwise_put(value, &sf->value, dst.field->n_bytes, dst.ofs, dst.n_bits); | |
2546 | bitwise_put(UINT64_MAX, &sf->mask, | |
2547 | dst.field->n_bytes, dst.ofs, dst.n_bits); | |
2548 | return NULL; | |
2549 | } | |
2550 | ||
c2d936a4 BP |
2551 | static void |
2552 | format_SET_FIELD(const struct ofpact_set_field *a, struct ds *s) | |
2553 | { | |
7eb4b1f1 BP |
2554 | if (a->ofpact.raw == NXAST_RAW_REG_LOAD) { |
2555 | struct mf_subfield dst; | |
2556 | uint64_t value; | |
2557 | ||
2558 | dst.ofs = dst.n_bits = 0; | |
2559 | while (next_load_segment(a, &dst, &value)) { | |
2560 | ds_put_format(s, "load:%#"PRIx64"->", value); | |
2561 | mf_format_subfield(&dst, s); | |
2562 | ds_put_char(s, ','); | |
2563 | } | |
2564 | ds_chomp(s, ','); | |
2565 | } else { | |
2566 | ds_put_cstr(s, "set_field:"); | |
2567 | mf_format(a->field, &a->value, &a->mask, s); | |
2568 | ds_put_format(s, "->%s", a->field->name); | |
2569 | } | |
2570 | } | |
2571 | ||
2572 | /* Appends an OFPACT_SET_FIELD ofpact to 'ofpacts' and returns it. The ofpact | |
2573 | * is marked such that, if possible, it will be translated to OpenFlow as | |
2574 | * NXAST_REG_LOAD extension actions rather than OFPAT_SET_FIELD, either because | |
2575 | * that was the way that the action was expressed when it came into OVS or for | |
2576 | * backward compatibility. */ | |
2577 | struct ofpact_set_field * | |
2578 | ofpact_put_reg_load(struct ofpbuf *ofpacts) | |
2579 | { | |
2580 | struct ofpact_set_field *sf = ofpact_put_SET_FIELD(ofpacts); | |
2581 | sf->ofpact.raw = NXAST_RAW_REG_LOAD; | |
2582 | return sf; | |
c2d936a4 BP |
2583 | } |
2584 | \f | |
2585 | /* Action structure for NXAST_STACK_PUSH and NXAST_STACK_POP. | |
2586 | * | |
2587 | * Pushes (or pops) field[offset: offset + n_bits] to (or from) | |
2588 | * top of the stack. | |
2589 | */ | |
2590 | struct nx_action_stack { | |
2591 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2592 | ovs_be16 len; /* Length is 16. */ | |
2593 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2594 | ovs_be16 subtype; /* NXAST_STACK_PUSH or NXAST_STACK_POP. */ | |
2595 | ovs_be16 offset; /* Bit offset into the field. */ | |
bad8a439 BP |
2596 | /* Followed by: |
2597 | * - OXM/NXM header for field to push or pop (4 or 8 bytes). | |
2598 | * - ovs_be16 'n_bits', the number of bits to extract from the field. | |
2599 | * - Enough 0-bytes to pad out the action to 24 bytes. */ | |
2600 | uint8_t pad[12]; /* See above. */ | |
a359d5ad | 2601 | }; |
c2d936a4 | 2602 | OFP_ASSERT(sizeof(struct nx_action_stack) == 24); |
a359d5ad | 2603 | |
bad8a439 | 2604 | static enum ofperr |
c2d936a4 BP |
2605 | decode_stack_action(const struct nx_action_stack *nasp, |
2606 | struct ofpact_stack *stack_action) | |
a359d5ad | 2607 | { |
bad8a439 BP |
2608 | enum ofperr error; |
2609 | struct ofpbuf b; | |
2610 | ||
c2d936a4 | 2611 | stack_action->subfield.ofs = ntohs(nasp->offset); |
bad8a439 BP |
2612 | |
2613 | ofpbuf_use_const(&b, nasp, sizeof *nasp); | |
2614 | ofpbuf_pull(&b, OBJECT_OFFSETOF(nasp, pad)); | |
2615 | error = nx_pull_header(&b, &stack_action->subfield.field, NULL); | |
2616 | if (error) { | |
2617 | return error; | |
2618 | } | |
6fd6ed71 | 2619 | stack_action->subfield.n_bits = ntohs(*(const ovs_be16 *) b.data); |
bad8a439 | 2620 | ofpbuf_pull(&b, 2); |
6fd6ed71 | 2621 | if (!is_all_zeros(b.data, b.size)) { |
bad8a439 BP |
2622 | return OFPERR_NXBRC_MUST_BE_ZERO; |
2623 | } | |
2624 | ||
2625 | return 0; | |
a359d5ad IY |
2626 | } |
2627 | ||
c2d936a4 BP |
2628 | static enum ofperr |
2629 | decode_NXAST_RAW_STACK_PUSH(const struct nx_action_stack *nasp, | |
2630 | struct ofpbuf *ofpacts) | |
a359d5ad | 2631 | { |
c2d936a4 | 2632 | struct ofpact_stack *push = ofpact_put_STACK_PUSH(ofpacts); |
bad8a439 BP |
2633 | enum ofperr error = decode_stack_action(nasp, push); |
2634 | return error ? error : nxm_stack_push_check(push, NULL); | |
a359d5ad IY |
2635 | } |
2636 | ||
c2d936a4 BP |
2637 | static enum ofperr |
2638 | decode_NXAST_RAW_STACK_POP(const struct nx_action_stack *nasp, | |
2639 | struct ofpbuf *ofpacts) | |
084c53de | 2640 | { |
c2d936a4 | 2641 | struct ofpact_stack *pop = ofpact_put_STACK_POP(ofpacts); |
bad8a439 BP |
2642 | enum ofperr error = decode_stack_action(nasp, pop); |
2643 | return error ? error : nxm_stack_pop_check(pop, NULL); | |
084c53de BP |
2644 | } |
2645 | ||
c2d936a4 BP |
2646 | static void |
2647 | encode_STACK_op(const struct ofpact_stack *stack_action, | |
2648 | struct nx_action_stack *nasp) | |
c0621c39 | 2649 | { |
bad8a439 BP |
2650 | struct ofpbuf b; |
2651 | ovs_be16 n_bits; | |
2652 | ||
c2d936a4 | 2653 | nasp->offset = htons(stack_action->subfield.ofs); |
bad8a439 BP |
2654 | |
2655 | ofpbuf_use_stack(&b, nasp, ntohs(nasp->len)); | |
2656 | ofpbuf_put_uninit(&b, OBJECT_OFFSETOF(nasp, pad)); | |
2657 | nx_put_header(&b, stack_action->subfield.field->id, 0, false); | |
2658 | n_bits = htons(stack_action->subfield.n_bits); | |
2659 | ofpbuf_put(&b, &n_bits, sizeof n_bits); | |
c0621c39 AW |
2660 | } |
2661 | ||
c2d936a4 BP |
2662 | static void |
2663 | encode_STACK_PUSH(const struct ofpact_stack *stack, | |
2664 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
2665 | { | |
2666 | encode_STACK_op(stack, put_NXAST_STACK_PUSH(out)); | |
2667 | } | |
8e97815e | 2668 | |
c2d936a4 BP |
2669 | static void |
2670 | encode_STACK_POP(const struct ofpact_stack *stack, | |
2671 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
8e97815e | 2672 | { |
c2d936a4 BP |
2673 | encode_STACK_op(stack, put_NXAST_STACK_POP(out)); |
2674 | } | |
8e97815e | 2675 | |
cab50449 | 2676 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2677 | parse_STACK_PUSH(char *arg, struct ofpbuf *ofpacts, |
2678 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2679 | { | |
2680 | return nxm_parse_stack_action(ofpact_put_STACK_PUSH(ofpacts), arg); | |
2681 | } | |
8e97815e | 2682 | |
cab50449 | 2683 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2684 | parse_STACK_POP(char *arg, struct ofpbuf *ofpacts, |
2685 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2686 | { | |
2687 | return nxm_parse_stack_action(ofpact_put_STACK_POP(ofpacts), arg); | |
8e97815e BP |
2688 | } |
2689 | ||
c2d936a4 BP |
2690 | static void |
2691 | format_STACK_PUSH(const struct ofpact_stack *a, struct ds *s) | |
8e97815e | 2692 | { |
c2d936a4 BP |
2693 | nxm_format_stack_push(a, s); |
2694 | } | |
8e97815e | 2695 | |
c2d936a4 BP |
2696 | static void |
2697 | format_STACK_POP(const struct ofpact_stack *a, struct ds *s) | |
2698 | { | |
2699 | nxm_format_stack_pop(a, s); | |
2700 | } | |
2701 | \f | |
2702 | /* Action structure for NXAST_DEC_TTL_CNT_IDS. | |
2703 | * | |
2704 | * If the packet is not IPv4 or IPv6, does nothing. For IPv4 or IPv6, if the | |
2705 | * TTL or hop limit is at least 2, decrements it by 1. Otherwise, if TTL or | |
2706 | * hop limit is 0 or 1, sends a packet-in to the controllers with each of the | |
2707 | * 'n_controllers' controller IDs specified in 'cnt_ids'. | |
2708 | * | |
2709 | * (This differs from NXAST_DEC_TTL in that for NXAST_DEC_TTL the packet-in is | |
2710 | * sent only to controllers with id 0.) | |
2711 | */ | |
2712 | struct nx_action_cnt_ids { | |
2713 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
2714 | ovs_be16 len; /* Length including slaves. */ | |
2715 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
2716 | ovs_be16 subtype; /* NXAST_DEC_TTL_CNT_IDS. */ | |
2717 | ||
2718 | ovs_be16 n_controllers; /* Number of controllers. */ | |
2719 | uint8_t zeros[4]; /* Must be zero. */ | |
2720 | ||
2721 | /* Followed by 1 or more controller ids. | |
2722 | * | |
2723 | * uint16_t cnt_ids[]; // Controller ids. | |
2724 | * uint8_t pad[]; // Must be 0 to 8-byte align cnt_ids[]. | |
2725 | */ | |
2726 | }; | |
2727 | OFP_ASSERT(sizeof(struct nx_action_cnt_ids) == 16); | |
2728 | ||
2729 | static enum ofperr | |
2730 | decode_OFPAT_RAW_DEC_NW_TTL(struct ofpbuf *out) | |
2731 | { | |
2732 | uint16_t id = 0; | |
2733 | struct ofpact_cnt_ids *ids; | |
2734 | enum ofperr error = 0; | |
2735 | ||
2736 | ids = ofpact_put_DEC_TTL(out); | |
2737 | ids->n_controllers = 1; | |
2738 | ofpbuf_put(out, &id, sizeof id); | |
6fd6ed71 | 2739 | ids = out->header; |
c2d936a4 BP |
2740 | ofpact_update_len(out, &ids->ofpact); |
2741 | return error; | |
2742 | } | |
2743 | ||
2744 | static enum ofperr | |
2745 | decode_NXAST_RAW_DEC_TTL_CNT_IDS(const struct nx_action_cnt_ids *nac_ids, | |
2746 | struct ofpbuf *out) | |
2747 | { | |
2748 | struct ofpact_cnt_ids *ids; | |
2749 | size_t ids_size; | |
2750 | int i; | |
2751 | ||
2752 | ids = ofpact_put_DEC_TTL(out); | |
2753 | ids->ofpact.raw = NXAST_RAW_DEC_TTL_CNT_IDS; | |
2754 | ids->n_controllers = ntohs(nac_ids->n_controllers); | |
2755 | ids_size = ntohs(nac_ids->len) - sizeof *nac_ids; | |
2756 | ||
2757 | if (!is_all_zeros(nac_ids->zeros, sizeof nac_ids->zeros)) { | |
2758 | return OFPERR_NXBRC_MUST_BE_ZERO; | |
8e97815e | 2759 | } |
c2d936a4 BP |
2760 | |
2761 | if (ids_size < ids->n_controllers * sizeof(ovs_be16)) { | |
2762 | VLOG_WARN_RL(&rl, "Nicira action dec_ttl_cnt_ids only has %"PRIuSIZE" " | |
2763 | "bytes allocated for controller ids. %"PRIuSIZE" bytes " | |
2764 | "are required for %"PRIu16" controllers.", | |
2765 | ids_size, ids->n_controllers * sizeof(ovs_be16), | |
2766 | ids->n_controllers); | |
2767 | return OFPERR_OFPBAC_BAD_LEN; | |
2768 | } | |
2769 | ||
2770 | for (i = 0; i < ids->n_controllers; i++) { | |
2771 | uint16_t id = ntohs(((ovs_be16 *)(nac_ids + 1))[i]); | |
2772 | ofpbuf_put(out, &id, sizeof id); | |
6fd6ed71 | 2773 | ids = out->header; |
c2d936a4 BP |
2774 | } |
2775 | ||
2776 | ofpact_update_len(out, &ids->ofpact); | |
2777 | ||
2778 | return 0; | |
8e97815e BP |
2779 | } |
2780 | ||
c2d936a4 BP |
2781 | static void |
2782 | encode_DEC_TTL(const struct ofpact_cnt_ids *dec_ttl, | |
2783 | enum ofp_version ofp_version, struct ofpbuf *out) | |
8e97815e | 2784 | { |
c2d936a4 BP |
2785 | if (dec_ttl->ofpact.raw == NXAST_RAW_DEC_TTL_CNT_IDS |
2786 | || dec_ttl->n_controllers != 1 | |
2787 | || dec_ttl->cnt_ids[0] != 0) { | |
2788 | struct nx_action_cnt_ids *nac_ids = put_NXAST_DEC_TTL_CNT_IDS(out); | |
2789 | int ids_len = ROUND_UP(2 * dec_ttl->n_controllers, OFP_ACTION_ALIGN); | |
2790 | ovs_be16 *ids; | |
2791 | size_t i; | |
8e97815e | 2792 | |
c2d936a4 BP |
2793 | nac_ids->len = htons(ntohs(nac_ids->len) + ids_len); |
2794 | nac_ids->n_controllers = htons(dec_ttl->n_controllers); | |
2795 | ||
2796 | ids = ofpbuf_put_zeros(out, ids_len); | |
2797 | for (i = 0; i < dec_ttl->n_controllers; i++) { | |
2798 | ids[i] = htons(dec_ttl->cnt_ids[i]); | |
8e97815e | 2799 | } |
c2d936a4 BP |
2800 | } else { |
2801 | put_OFPAT_DEC_NW_TTL(out, ofp_version); | |
8e97815e | 2802 | } |
8e97815e BP |
2803 | } |
2804 | ||
c2d936a4 BP |
2805 | static void |
2806 | parse_noargs_dec_ttl(struct ofpbuf *ofpacts) | |
d01c980f | 2807 | { |
c2d936a4 BP |
2808 | struct ofpact_cnt_ids *ids; |
2809 | uint16_t id = 0; | |
2810 | ||
2811 | ofpact_put_DEC_TTL(ofpacts); | |
2812 | ofpbuf_put(ofpacts, &id, sizeof id); | |
6fd6ed71 | 2813 | ids = ofpacts->header; |
c2d936a4 BP |
2814 | ids->n_controllers++; |
2815 | ofpact_update_len(ofpacts, &ids->ofpact); | |
d01c980f BP |
2816 | } |
2817 | ||
cab50449 | 2818 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2819 | parse_DEC_TTL(char *arg, struct ofpbuf *ofpacts, |
2820 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
d01c980f | 2821 | { |
c2d936a4 BP |
2822 | if (*arg == '\0') { |
2823 | parse_noargs_dec_ttl(ofpacts); | |
2824 | } else { | |
2825 | struct ofpact_cnt_ids *ids; | |
2826 | char *cntr; | |
2827 | ||
2828 | ids = ofpact_put_DEC_TTL(ofpacts); | |
2829 | ids->ofpact.raw = NXAST_RAW_DEC_TTL_CNT_IDS; | |
2830 | for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL; | |
2831 | cntr = strtok_r(NULL, ", ", &arg)) { | |
2832 | uint16_t id = atoi(cntr); | |
2833 | ||
2834 | ofpbuf_put(ofpacts, &id, sizeof id); | |
6fd6ed71 | 2835 | ids = ofpacts->header; |
c2d936a4 BP |
2836 | ids->n_controllers++; |
2837 | } | |
2838 | if (!ids->n_controllers) { | |
2839 | return xstrdup("dec_ttl_cnt_ids: expected at least one controller " | |
2840 | "id."); | |
2841 | } | |
2842 | ofpact_update_len(ofpacts, &ids->ofpact); | |
2843 | } | |
2844 | return NULL; | |
d01c980f BP |
2845 | } |
2846 | ||
c2d936a4 BP |
2847 | static void |
2848 | format_DEC_TTL(const struct ofpact_cnt_ids *a, struct ds *s) | |
d01c980f | 2849 | { |
c2d936a4 | 2850 | size_t i; |
d01c980f | 2851 | |
c2d936a4 BP |
2852 | ds_put_cstr(s, "dec_ttl"); |
2853 | if (a->ofpact.raw == NXAST_RAW_DEC_TTL_CNT_IDS) { | |
2854 | ds_put_cstr(s, "("); | |
2855 | for (i = 0; i < a->n_controllers; i++) { | |
2856 | if (i) { | |
2857 | ds_put_cstr(s, ","); | |
d01c980f | 2858 | } |
c2d936a4 BP |
2859 | ds_put_format(s, "%"PRIu16, a->cnt_ids[i]); |
2860 | } | |
2861 | ds_put_cstr(s, ")"); | |
d01c980f BP |
2862 | } |
2863 | } | |
c2d936a4 BP |
2864 | \f |
2865 | /* Set MPLS label actions. */ | |
d01c980f BP |
2866 | |
2867 | static enum ofperr | |
c2d936a4 | 2868 | decode_OFPAT_RAW_SET_MPLS_LABEL(ovs_be32 label, struct ofpbuf *out) |
d01c980f | 2869 | { |
c2d936a4 BP |
2870 | ofpact_put_SET_MPLS_LABEL(out)->label = label; |
2871 | return 0; | |
2872 | } | |
d01c980f | 2873 | |
c2d936a4 BP |
2874 | static void |
2875 | encode_SET_MPLS_LABEL(const struct ofpact_mpls_label *label, | |
2876 | enum ofp_version ofp_version, | |
2877 | struct ofpbuf *out) | |
2878 | { | |
2879 | if (ofp_version < OFP12_VERSION) { | |
2880 | put_OFPAT_SET_MPLS_LABEL(out, ofp_version, label->label); | |
2881 | } else { | |
2882 | ofpact_put_set_field(out, ofp_version, MFF_MPLS_LABEL, | |
2883 | ntohl(label->label)); | |
d01c980f | 2884 | } |
c2d936a4 | 2885 | } |
d01c980f | 2886 | |
cab50449 | 2887 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2888 | parse_SET_MPLS_LABEL(char *arg, struct ofpbuf *ofpacts, |
2889 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2890 | { | |
2891 | struct ofpact_mpls_label *mpls_label = ofpact_put_SET_MPLS_LABEL(ofpacts); | |
2892 | if (*arg == '\0') { | |
2893 | return xstrdup("set_mpls_label: expected label."); | |
d01c980f | 2894 | } |
c2d936a4 BP |
2895 | |
2896 | mpls_label->label = htonl(atoi(arg)); | |
2897 | return NULL; | |
d01c980f BP |
2898 | } |
2899 | ||
2900 | static void | |
c2d936a4 | 2901 | format_SET_MPLS_LABEL(const struct ofpact_mpls_label *a, struct ds *s) |
d01c980f | 2902 | { |
c2d936a4 | 2903 | ds_put_format(s, "set_mpls_label(%"PRIu32")", ntohl(a->label)); |
d01c980f | 2904 | } |
c2d936a4 BP |
2905 | \f |
2906 | /* Set MPLS TC actions. */ | |
d01c980f | 2907 | |
c2d936a4 BP |
2908 | static enum ofperr |
2909 | decode_OFPAT_RAW_SET_MPLS_TC(uint8_t tc, struct ofpbuf *out) | |
d01c980f | 2910 | { |
c2d936a4 BP |
2911 | ofpact_put_SET_MPLS_TC(out)->tc = tc; |
2912 | return 0; | |
2913 | } | |
d01c980f | 2914 | |
c2d936a4 BP |
2915 | static void |
2916 | encode_SET_MPLS_TC(const struct ofpact_mpls_tc *tc, | |
2917 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2918 | { | |
2919 | if (ofp_version < OFP12_VERSION) { | |
2920 | put_OFPAT_SET_MPLS_TC(out, ofp_version, tc->tc); | |
2921 | } else { | |
2922 | ofpact_put_set_field(out, ofp_version, MFF_MPLS_TC, tc->tc); | |
8f2cded4 | 2923 | } |
c2d936a4 | 2924 | } |
8f2cded4 | 2925 | |
cab50449 | 2926 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2927 | parse_SET_MPLS_TC(char *arg, struct ofpbuf *ofpacts, |
2928 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2929 | { | |
2930 | struct ofpact_mpls_tc *mpls_tc = ofpact_put_SET_MPLS_TC(ofpacts); | |
d01c980f | 2931 | |
c2d936a4 BP |
2932 | if (*arg == '\0') { |
2933 | return xstrdup("set_mpls_tc: expected tc."); | |
d01c980f BP |
2934 | } |
2935 | ||
c2d936a4 BP |
2936 | mpls_tc->tc = atoi(arg); |
2937 | return NULL; | |
2938 | } | |
d01c980f | 2939 | |
c2d936a4 BP |
2940 | static void |
2941 | format_SET_MPLS_TC(const struct ofpact_mpls_tc *a, struct ds *s) | |
2942 | { | |
2943 | ds_put_format(s, "set_mpls_ttl(%"PRIu8")", a->tc); | |
2944 | } | |
2945 | \f | |
2946 | /* Set MPLS TTL actions. */ | |
d01c980f | 2947 | |
c2d936a4 BP |
2948 | static enum ofperr |
2949 | decode_OFPAT_RAW_SET_MPLS_TTL(uint8_t ttl, struct ofpbuf *out) | |
2950 | { | |
2951 | ofpact_put_SET_MPLS_TTL(out)->ttl = ttl; | |
2952 | return 0; | |
2953 | } | |
638a19b0 | 2954 | |
c2d936a4 BP |
2955 | static void |
2956 | encode_SET_MPLS_TTL(const struct ofpact_mpls_ttl *ttl, | |
2957 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2958 | { | |
2959 | put_OFPAT_SET_MPLS_TTL(out, ofp_version, ttl->ttl); | |
2960 | } | |
638a19b0 | 2961 | |
c2d936a4 BP |
2962 | /* Parses 'arg' as the argument to a "set_mpls_ttl" action, and appends such an |
2963 | * action to 'ofpacts'. | |
2964 | * | |
2965 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
2966 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 2967 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
2968 | parse_SET_MPLS_TTL(char *arg, struct ofpbuf *ofpacts, |
2969 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
2970 | { | |
2971 | struct ofpact_mpls_ttl *mpls_ttl = ofpact_put_SET_MPLS_TTL(ofpacts); | |
d01c980f | 2972 | |
c2d936a4 BP |
2973 | if (*arg == '\0') { |
2974 | return xstrdup("set_mpls_ttl: expected ttl."); | |
b19e8793 | 2975 | } |
7fdb60a7 | 2976 | |
c2d936a4 BP |
2977 | mpls_ttl->ttl = atoi(arg); |
2978 | return NULL; | |
2979 | } | |
4cceacb9 | 2980 | |
c2d936a4 BP |
2981 | static void |
2982 | format_SET_MPLS_TTL(const struct ofpact_mpls_ttl *a, struct ds *s) | |
2983 | { | |
2984 | ds_put_format(s, "set_mpls_ttl(%"PRIu8")", a->ttl); | |
2985 | } | |
2986 | \f | |
2987 | /* Decrement MPLS TTL actions. */ | |
4cceacb9 | 2988 | |
c2d936a4 BP |
2989 | static enum ofperr |
2990 | decode_OFPAT_RAW_DEC_MPLS_TTL(struct ofpbuf *out) | |
2991 | { | |
2992 | ofpact_put_DEC_MPLS_TTL(out); | |
2993 | return 0; | |
2994 | } | |
8dd54666 | 2995 | |
c2d936a4 BP |
2996 | static void |
2997 | encode_DEC_MPLS_TTL(const struct ofpact_null *null OVS_UNUSED, | |
2998 | enum ofp_version ofp_version, struct ofpbuf *out) | |
2999 | { | |
3000 | put_OFPAT_DEC_MPLS_TTL(out, ofp_version); | |
3001 | } | |
3002 | ||
cab50449 | 3003 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3004 | parse_DEC_MPLS_TTL(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
3005 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3006 | { | |
3007 | ofpact_put_DEC_MPLS_TTL(ofpacts); | |
3008 | return NULL; | |
3009 | } | |
3010 | ||
3011 | static void | |
3012 | format_DEC_MPLS_TTL(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
3013 | { | |
3014 | ds_put_cstr(s, "dec_mpls_ttl"); | |
3015 | } | |
3016 | \f | |
3017 | /* Push MPLS label action. */ | |
3018 | ||
3019 | static enum ofperr | |
3020 | decode_OFPAT_RAW_PUSH_MPLS(ovs_be16 ethertype, struct ofpbuf *out) | |
3021 | { | |
3022 | struct ofpact_push_mpls *oam; | |
3023 | ||
3024 | if (!eth_type_mpls(ethertype)) { | |
3025 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
8dd54666 | 3026 | } |
c2d936a4 BP |
3027 | oam = ofpact_put_PUSH_MPLS(out); |
3028 | oam->ethertype = ethertype; | |
d01c980f | 3029 | |
c2d936a4 BP |
3030 | return 0; |
3031 | } | |
3032 | ||
3033 | static void | |
3034 | encode_PUSH_MPLS(const struct ofpact_push_mpls *push_mpls, | |
3035 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3036 | { | |
3037 | put_OFPAT_PUSH_MPLS(out, ofp_version, push_mpls->ethertype); | |
3038 | } | |
3039 | ||
cab50449 | 3040 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3041 | parse_PUSH_MPLS(char *arg, struct ofpbuf *ofpacts, |
3042 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3043 | { | |
3044 | uint16_t ethertype; | |
3045 | char *error; | |
3046 | ||
3047 | error = str_to_u16(arg, "push_mpls", ðertype); | |
3048 | if (!error) { | |
3049 | ofpact_put_PUSH_MPLS(ofpacts)->ethertype = htons(ethertype); | |
d01c980f BP |
3050 | } |
3051 | return error; | |
3052 | } | |
c2d936a4 BP |
3053 | |
3054 | static void | |
3055 | format_PUSH_MPLS(const struct ofpact_push_mpls *a, struct ds *s) | |
3056 | { | |
3057 | ds_put_format(s, "push_mpls:0x%04"PRIx16, ntohs(a->ethertype)); | |
3058 | } | |
d01c980f | 3059 | \f |
c2d936a4 BP |
3060 | /* Pop MPLS label action. */ |
3061 | ||
3062 | static enum ofperr | |
3063 | decode_OFPAT_RAW_POP_MPLS(ovs_be16 ethertype, struct ofpbuf *out) | |
57ad4e9e | 3064 | { |
c2d936a4 BP |
3065 | ofpact_put_POP_MPLS(out)->ethertype = ethertype; |
3066 | return 0; | |
3067 | } | |
57ad4e9e | 3068 | |
c2d936a4 BP |
3069 | static void |
3070 | encode_POP_MPLS(const struct ofpact_pop_mpls *pop_mpls, | |
3071 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3072 | { | |
3073 | put_OFPAT_POP_MPLS(out, ofp_version, pop_mpls->ethertype); | |
3074 | } | |
3075 | ||
cab50449 | 3076 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3077 | parse_POP_MPLS(char *arg, struct ofpbuf *ofpacts, |
3078 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3079 | { | |
3080 | uint16_t ethertype; | |
3081 | char *error; | |
3082 | ||
3083 | error = str_to_u16(arg, "pop_mpls", ðertype); | |
3084 | if (!error) { | |
3085 | ofpact_put_POP_MPLS(ofpacts)->ethertype = htons(ethertype); | |
57ad4e9e | 3086 | } |
c2d936a4 | 3087 | return error; |
57ad4e9e BP |
3088 | } |
3089 | ||
ba2fe8e9 | 3090 | static void |
c2d936a4 | 3091 | format_POP_MPLS(const struct ofpact_pop_mpls *a, struct ds *s) |
ba2fe8e9 | 3092 | { |
c2d936a4 | 3093 | ds_put_format(s, "pop_mpls:0x%04"PRIx16, ntohs(a->ethertype)); |
ba2fe8e9 | 3094 | } |
c2d936a4 BP |
3095 | \f |
3096 | /* Set tunnel ID actions. */ | |
ba2fe8e9 | 3097 | |
f25d0cf3 | 3098 | static enum ofperr |
c2d936a4 | 3099 | decode_NXAST_RAW_SET_TUNNEL(uint32_t tun_id, struct ofpbuf *out) |
f25d0cf3 | 3100 | { |
c2d936a4 BP |
3101 | struct ofpact_tunnel *tunnel = ofpact_put_SET_TUNNEL(out); |
3102 | tunnel->ofpact.raw = NXAST_RAW_SET_TUNNEL; | |
3103 | tunnel->tun_id = tun_id; | |
3104 | return 0; | |
3105 | } | |
f25d0cf3 | 3106 | |
c2d936a4 BP |
3107 | static enum ofperr |
3108 | decode_NXAST_RAW_SET_TUNNEL64(uint64_t tun_id, struct ofpbuf *out) | |
3109 | { | |
3110 | struct ofpact_tunnel *tunnel = ofpact_put_SET_TUNNEL(out); | |
3111 | tunnel->ofpact.raw = NXAST_RAW_SET_TUNNEL64; | |
3112 | tunnel->tun_id = tun_id; | |
3113 | return 0; | |
3114 | } | |
f25d0cf3 | 3115 | |
c2d936a4 BP |
3116 | static void |
3117 | encode_SET_TUNNEL(const struct ofpact_tunnel *tunnel, | |
3118 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3119 | { | |
3120 | uint64_t tun_id = tunnel->tun_id; | |
f25d0cf3 | 3121 | |
c2d936a4 BP |
3122 | if (ofp_version < OFP12_VERSION) { |
3123 | if (tun_id <= UINT32_MAX | |
3124 | && tunnel->ofpact.raw != NXAST_RAW_SET_TUNNEL64) { | |
3125 | put_NXAST_SET_TUNNEL(out, tun_id); | |
3126 | } else { | |
3127 | put_NXAST_SET_TUNNEL64(out, tun_id); | |
f25d0cf3 | 3128 | } |
c2d936a4 BP |
3129 | } else { |
3130 | ofpact_put_set_field(out, ofp_version, MFF_TUN_ID, tun_id); | |
3131 | } | |
3132 | } | |
f25d0cf3 | 3133 | |
cab50449 | 3134 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3135 | parse_set_tunnel(char *arg, struct ofpbuf *ofpacts, |
3136 | enum ofp_raw_action_type raw) | |
3137 | { | |
3138 | struct ofpact_tunnel *tunnel; | |
ca287d20 | 3139 | |
c2d936a4 BP |
3140 | tunnel = ofpact_put_SET_TUNNEL(ofpacts); |
3141 | tunnel->ofpact.raw = raw; | |
3142 | return str_to_u64(arg, &tunnel->tun_id); | |
3143 | } | |
8621547c | 3144 | |
cab50449 | 3145 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3146 | parse_SET_TUNNEL(char *arg, struct ofpbuf *ofpacts, |
3147 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3148 | { | |
3149 | return parse_set_tunnel(arg, ofpacts, NXAST_RAW_SET_TUNNEL); | |
3150 | } | |
8621547c | 3151 | |
c2d936a4 BP |
3152 | static void |
3153 | format_SET_TUNNEL(const struct ofpact_tunnel *a, struct ds *s) | |
3154 | { | |
3155 | ds_put_format(s, "set_tunnel%s:%#"PRIx64, | |
3156 | (a->tun_id > UINT32_MAX | |
3157 | || a->ofpact.raw == NXAST_RAW_SET_TUNNEL64 ? "64" : ""), | |
3158 | a->tun_id); | |
3159 | } | |
3160 | \f | |
3161 | /* Set queue action. */ | |
8621547c | 3162 | |
c2d936a4 BP |
3163 | static enum ofperr |
3164 | decode_OFPAT_RAW_SET_QUEUE(uint32_t queue_id, struct ofpbuf *out) | |
3165 | { | |
3166 | ofpact_put_SET_QUEUE(out)->queue_id = queue_id; | |
3167 | return 0; | |
3168 | } | |
8621547c | 3169 | |
c2d936a4 BP |
3170 | static void |
3171 | encode_SET_QUEUE(const struct ofpact_queue *queue, | |
3172 | enum ofp_version ofp_version, struct ofpbuf *out) | |
3173 | { | |
3174 | put_OFPAT_SET_QUEUE(out, ofp_version, queue->queue_id); | |
3175 | } | |
8621547c | 3176 | |
cab50449 | 3177 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3178 | parse_SET_QUEUE(char *arg, struct ofpbuf *ofpacts, |
3179 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3180 | { | |
3181 | return str_to_u32(arg, &ofpact_put_SET_QUEUE(ofpacts)->queue_id); | |
3182 | } | |
8621547c | 3183 | |
c2d936a4 BP |
3184 | static void |
3185 | format_SET_QUEUE(const struct ofpact_queue *a, struct ds *s) | |
3186 | { | |
3187 | ds_put_format(s, "set_queue:%"PRIu32, a->queue_id); | |
3188 | } | |
3189 | \f | |
3190 | /* Pop queue action. */ | |
1e7db674 | 3191 | |
c2d936a4 BP |
3192 | static enum ofperr |
3193 | decode_NXAST_RAW_POP_QUEUE(struct ofpbuf *out) | |
3194 | { | |
3195 | ofpact_put_POP_QUEUE(out); | |
3196 | return 0; | |
3197 | } | |
f25d0cf3 | 3198 | |
c2d936a4 BP |
3199 | static void |
3200 | encode_POP_QUEUE(const struct ofpact_null *null OVS_UNUSED, | |
3201 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
3202 | { | |
3203 | put_NXAST_POP_QUEUE(out); | |
3204 | } | |
f25d0cf3 | 3205 | |
cab50449 | 3206 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3207 | parse_POP_QUEUE(const char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
3208 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3209 | { | |
3210 | ofpact_put_POP_QUEUE(ofpacts); | |
3211 | return NULL; | |
3212 | } | |
f25d0cf3 | 3213 | |
c2d936a4 BP |
3214 | static void |
3215 | format_POP_QUEUE(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
3216 | { | |
3217 | ds_put_cstr(s, "pop_queue"); | |
3218 | } | |
3219 | \f | |
3220 | /* Action structure for NXAST_FIN_TIMEOUT. | |
3221 | * | |
3222 | * This action changes the idle timeout or hard timeout, or both, of this | |
3223 | * OpenFlow rule when the rule matches a TCP packet with the FIN or RST flag. | |
3224 | * When such a packet is observed, the action reduces the rule's idle timeout | |
3225 | * to 'fin_idle_timeout' and its hard timeout to 'fin_hard_timeout'. This | |
3226 | * action has no effect on an existing timeout that is already shorter than the | |
3227 | * one that the action specifies. A 'fin_idle_timeout' or 'fin_hard_timeout' | |
3228 | * of zero has no effect on the respective timeout. | |
3229 | * | |
3230 | * 'fin_idle_timeout' and 'fin_hard_timeout' are measured in seconds. | |
3231 | * 'fin_hard_timeout' specifies time since the flow's creation, not since the | |
3232 | * receipt of the FIN or RST. | |
3233 | * | |
3234 | * This is useful for quickly discarding learned TCP flows that otherwise will | |
3235 | * take a long time to expire. | |
3236 | * | |
3237 | * This action is intended for use with an OpenFlow rule that matches only a | |
3238 | * single TCP flow. If the rule matches multiple TCP flows (e.g. it wildcards | |
3239 | * all TCP traffic, or all TCP traffic to a particular port), then any FIN or | |
3240 | * RST in any of those flows will cause the entire OpenFlow rule to expire | |
3241 | * early, which is not normally desirable. | |
3242 | */ | |
3243 | struct nx_action_fin_timeout { | |
3244 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3245 | ovs_be16 len; /* 16. */ | |
3246 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3247 | ovs_be16 subtype; /* NXAST_FIN_TIMEOUT. */ | |
3248 | ovs_be16 fin_idle_timeout; /* New idle timeout, if nonzero. */ | |
3249 | ovs_be16 fin_hard_timeout; /* New hard timeout, if nonzero. */ | |
3250 | ovs_be16 pad; /* Must be zero. */ | |
3251 | }; | |
3252 | OFP_ASSERT(sizeof(struct nx_action_fin_timeout) == 16); | |
f25d0cf3 | 3253 | |
c2d936a4 BP |
3254 | static enum ofperr |
3255 | decode_NXAST_RAW_FIN_TIMEOUT(const struct nx_action_fin_timeout *naft, | |
3256 | struct ofpbuf *out) | |
3257 | { | |
3258 | struct ofpact_fin_timeout *oft; | |
8621547c | 3259 | |
c2d936a4 BP |
3260 | oft = ofpact_put_FIN_TIMEOUT(out); |
3261 | oft->fin_idle_timeout = ntohs(naft->fin_idle_timeout); | |
3262 | oft->fin_hard_timeout = ntohs(naft->fin_hard_timeout); | |
3263 | return 0; | |
3264 | } | |
f25d0cf3 | 3265 | |
c2d936a4 BP |
3266 | static void |
3267 | encode_FIN_TIMEOUT(const struct ofpact_fin_timeout *fin_timeout, | |
3268 | enum ofp_version ofp_version OVS_UNUSED, | |
3269 | struct ofpbuf *out) | |
3270 | { | |
3271 | struct nx_action_fin_timeout *naft = put_NXAST_FIN_TIMEOUT(out); | |
3272 | naft->fin_idle_timeout = htons(fin_timeout->fin_idle_timeout); | |
3273 | naft->fin_hard_timeout = htons(fin_timeout->fin_hard_timeout); | |
3274 | } | |
f25d0cf3 | 3275 | |
cab50449 | 3276 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3277 | parse_FIN_TIMEOUT(char *arg, struct ofpbuf *ofpacts, |
3278 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3279 | { | |
3280 | struct ofpact_fin_timeout *oft = ofpact_put_FIN_TIMEOUT(ofpacts); | |
3281 | char *key, *value; | |
f25d0cf3 | 3282 | |
c2d936a4 BP |
3283 | while (ofputil_parse_key_value(&arg, &key, &value)) { |
3284 | char *error; | |
b02475c5 | 3285 | |
c2d936a4 BP |
3286 | if (!strcmp(key, "idle_timeout")) { |
3287 | error = str_to_u16(value, key, &oft->fin_idle_timeout); | |
3288 | } else if (!strcmp(key, "hard_timeout")) { | |
3289 | error = str_to_u16(value, key, &oft->fin_hard_timeout); | |
3290 | } else { | |
3291 | error = xasprintf("invalid key '%s' in 'fin_timeout' argument", | |
3292 | key); | |
8621547c | 3293 | } |
8dd54666 | 3294 | |
c2d936a4 BP |
3295 | if (error) { |
3296 | return error; | |
9cae45dc | 3297 | } |
9cae45dc | 3298 | } |
c2d936a4 BP |
3299 | return NULL; |
3300 | } | |
e3b56933 | 3301 | |
c2d936a4 BP |
3302 | static void |
3303 | format_FIN_TIMEOUT(const struct ofpact_fin_timeout *a, struct ds *s) | |
3304 | { | |
3305 | ds_put_cstr(s, "fin_timeout("); | |
3306 | if (a->fin_idle_timeout) { | |
3307 | ds_put_format(s, "idle_timeout=%"PRIu16",", a->fin_idle_timeout); | |
7e9f8266 | 3308 | } |
c2d936a4 BP |
3309 | if (a->fin_hard_timeout) { |
3310 | ds_put_format(s, "hard_timeout=%"PRIu16",", a->fin_hard_timeout); | |
f25d0cf3 | 3311 | } |
c2d936a4 BP |
3312 | ds_chomp(s, ','); |
3313 | ds_put_char(s, ')'); | |
f25d0cf3 | 3314 | } |
c2d936a4 BP |
3315 | \f |
3316 | /* Action structures for NXAST_RESUBMIT and NXAST_RESUBMIT_TABLE. | |
eca39bce | 3317 | * |
c2d936a4 | 3318 | * These actions search one of the switch's flow tables: |
ba2fe8e9 | 3319 | * |
c2d936a4 BP |
3320 | * - For NXAST_RESUBMIT_TABLE only, if the 'table' member is not 255, then |
3321 | * it specifies the table to search. | |
ca287d20 | 3322 | * |
c2d936a4 BP |
3323 | * - Otherwise (for NXAST_RESUBMIT_TABLE with a 'table' of 255, or for |
3324 | * NXAST_RESUBMIT regardless of 'table'), it searches the current flow | |
3325 | * table, that is, the OpenFlow flow table that contains the flow from | |
3326 | * which this action was obtained. If this action did not come from a | |
3327 | * flow table (e.g. it came from an OFPT_PACKET_OUT message), then table 0 | |
3328 | * is the current table. | |
3329 | * | |
3330 | * The flow table lookup uses a flow that may be slightly modified from the | |
3331 | * original lookup: | |
3332 | * | |
3333 | * - For NXAST_RESUBMIT, the 'in_port' member of struct nx_action_resubmit | |
3334 | * is used as the flow's in_port. | |
3335 | * | |
3336 | * - For NXAST_RESUBMIT_TABLE, if the 'in_port' member is not OFPP_IN_PORT, | |
3337 | * then its value is used as the flow's in_port. Otherwise, the original | |
3338 | * in_port is used. | |
3339 | * | |
3340 | * - If actions that modify the flow (e.g. OFPAT_SET_VLAN_VID) precede the | |
3341 | * resubmit action, then the flow is updated with the new values. | |
3342 | * | |
3343 | * Following the lookup, the original in_port is restored. | |
3344 | * | |
3345 | * If the modified flow matched in the flow table, then the corresponding | |
3346 | * actions are executed. Afterward, actions following the resubmit in the | |
3347 | * original set of actions, if any, are executed; any changes made to the | |
3348 | * packet (e.g. changes to VLAN) by secondary actions persist when those | |
3349 | * actions are executed, although the original in_port is restored. | |
3350 | * | |
3351 | * Resubmit actions may be used any number of times within a set of actions. | |
3352 | * | |
3353 | * Resubmit actions may nest to an implementation-defined depth. Beyond this | |
3354 | * implementation-defined depth, further resubmit actions are simply ignored. | |
3355 | * | |
3356 | * NXAST_RESUBMIT ignores 'table' and 'pad'. NXAST_RESUBMIT_TABLE requires | |
3357 | * 'pad' to be all-bits-zero. | |
3358 | * | |
3359 | * Open vSwitch 1.0.1 and earlier did not support recursion. Open vSwitch | |
3360 | * before 1.2.90 did not support NXAST_RESUBMIT_TABLE. | |
3361 | */ | |
3362 | struct nx_action_resubmit { | |
3363 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3364 | ovs_be16 len; /* Length is 16. */ | |
3365 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3366 | ovs_be16 subtype; /* NXAST_RESUBMIT. */ | |
3367 | ovs_be16 in_port; /* New in_port for checking flow table. */ | |
3368 | uint8_t table; /* NXAST_RESUBMIT_TABLE: table to use. */ | |
3369 | uint8_t pad[3]; | |
3370 | }; | |
3371 | OFP_ASSERT(sizeof(struct nx_action_resubmit) == 16); | |
3372 | ||
3373 | static enum ofperr | |
3374 | decode_NXAST_RAW_RESUBMIT(uint16_t port, struct ofpbuf *out) | |
f25d0cf3 | 3375 | { |
c2d936a4 | 3376 | struct ofpact_resubmit *resubmit; |
f25d0cf3 | 3377 | |
c2d936a4 BP |
3378 | resubmit = ofpact_put_RESUBMIT(out); |
3379 | resubmit->ofpact.raw = NXAST_RAW_RESUBMIT; | |
3380 | resubmit->in_port = u16_to_ofp(port); | |
3381 | resubmit->table_id = 0xff; | |
3382 | return 0; | |
f25d0cf3 | 3383 | } |
4cceacb9 | 3384 | |
c2d936a4 BP |
3385 | static enum ofperr |
3386 | decode_NXAST_RAW_RESUBMIT_TABLE(const struct nx_action_resubmit *nar, | |
3387 | struct ofpbuf *out) | |
ba2fe8e9 | 3388 | { |
c2d936a4 | 3389 | struct ofpact_resubmit *resubmit; |
ba2fe8e9 | 3390 | |
c2d936a4 BP |
3391 | if (nar->pad[0] || nar->pad[1] || nar->pad[2]) { |
3392 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3393 | } | |
3394 | ||
3395 | resubmit = ofpact_put_RESUBMIT(out); | |
3396 | resubmit->ofpact.raw = NXAST_RAW_RESUBMIT_TABLE; | |
3397 | resubmit->in_port = u16_to_ofp(ntohs(nar->in_port)); | |
3398 | resubmit->table_id = nar->table; | |
3399 | return 0; | |
ba2fe8e9 BP |
3400 | } |
3401 | ||
c2d936a4 BP |
3402 | static void |
3403 | encode_RESUBMIT(const struct ofpact_resubmit *resubmit, | |
3404 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4cceacb9 | 3405 | { |
c2d936a4 | 3406 | uint16_t in_port = ofp_to_u16(resubmit->in_port); |
4cceacb9 | 3407 | |
c2d936a4 BP |
3408 | if (resubmit->table_id == 0xff |
3409 | && resubmit->ofpact.raw != NXAST_RAW_RESUBMIT_TABLE) { | |
3410 | put_NXAST_RESUBMIT(out, in_port); | |
3411 | } else { | |
3412 | struct nx_action_resubmit *nar = put_NXAST_RESUBMIT_TABLE(out); | |
3413 | nar->table = resubmit->table_id; | |
3414 | nar->in_port = htons(in_port); | |
3415 | } | |
3416 | } | |
6813ee7c | 3417 | |
cab50449 | 3418 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3419 | parse_RESUBMIT(char *arg, struct ofpbuf *ofpacts, |
3420 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3421 | { | |
3422 | struct ofpact_resubmit *resubmit; | |
3423 | char *in_port_s, *table_s; | |
6813ee7c | 3424 | |
c2d936a4 | 3425 | resubmit = ofpact_put_RESUBMIT(ofpacts); |
8f2cded4 | 3426 | |
c2d936a4 BP |
3427 | in_port_s = strsep(&arg, ","); |
3428 | if (in_port_s && in_port_s[0]) { | |
3429 | if (!ofputil_port_from_string(in_port_s, &resubmit->in_port)) { | |
3430 | return xasprintf("%s: resubmit to unknown port", in_port_s); | |
8f2cded4 | 3431 | } |
c2d936a4 BP |
3432 | } else { |
3433 | resubmit->in_port = OFPP_IN_PORT; | |
3434 | } | |
4cceacb9 | 3435 | |
c2d936a4 BP |
3436 | table_s = strsep(&arg, ","); |
3437 | if (table_s && table_s[0]) { | |
3438 | uint32_t table_id = 0; | |
3439 | char *error; | |
3440 | ||
3441 | error = str_to_u32(table_s, &table_id); | |
3442 | if (error) { | |
3443 | return error; | |
3444 | } | |
3445 | resubmit->table_id = table_id; | |
3446 | } else { | |
3447 | resubmit->table_id = 255; | |
4cceacb9 JS |
3448 | } |
3449 | ||
c2d936a4 BP |
3450 | if (resubmit->in_port == OFPP_IN_PORT && resubmit->table_id == 255) { |
3451 | return xstrdup("at least one \"in_port\" or \"table\" must be " | |
3452 | "specified on resubmit"); | |
3453 | } | |
3454 | return NULL; | |
3455 | } | |
3456 | ||
3457 | static void | |
3458 | format_RESUBMIT(const struct ofpact_resubmit *a, struct ds *s) | |
3459 | { | |
3460 | if (a->in_port != OFPP_IN_PORT && a->table_id == 255) { | |
3461 | ds_put_cstr(s, "resubmit:"); | |
3462 | ofputil_format_port(a->in_port, s); | |
3463 | } else { | |
3464 | ds_put_format(s, "resubmit("); | |
3465 | if (a->in_port != OFPP_IN_PORT) { | |
3466 | ofputil_format_port(a->in_port, s); | |
3467 | } | |
3468 | ds_put_char(s, ','); | |
3469 | if (a->table_id != 255) { | |
3470 | ds_put_format(s, "%"PRIu8, a->table_id); | |
3471 | } | |
3472 | ds_put_char(s, ')'); | |
3473 | } | |
3474 | } | |
3475 | \f | |
3476 | /* Action structure for NXAST_LEARN. | |
3477 | * | |
3478 | * This action adds or modifies a flow in an OpenFlow table, similar to | |
3479 | * OFPT_FLOW_MOD with OFPFC_MODIFY_STRICT as 'command'. The new flow has the | |
3480 | * specified idle timeout, hard timeout, priority, cookie, and flags. The new | |
3481 | * flow's match criteria and actions are built by applying each of the series | |
3482 | * of flow_mod_spec elements included as part of the action. | |
3483 | * | |
3484 | * A flow_mod_spec starts with a 16-bit header. A header that is all-bits-0 is | |
3485 | * a no-op used for padding the action as a whole to a multiple of 8 bytes in | |
3486 | * length. Otherwise, the flow_mod_spec can be thought of as copying 'n_bits' | |
3487 | * bits from a source to a destination. In this case, the header contains | |
3488 | * multiple fields: | |
3489 | * | |
3490 | * 15 14 13 12 11 10 0 | |
3491 | * +------+---+------+---------------------------------+ | |
3492 | * | 0 |src| dst | n_bits | | |
3493 | * +------+---+------+---------------------------------+ | |
3494 | * | |
3495 | * The meaning and format of a flow_mod_spec depends on 'src' and 'dst'. The | |
3496 | * following table summarizes the meaning of each possible combination. | |
3497 | * Details follow the table: | |
3498 | * | |
3499 | * src dst meaning | |
3500 | * --- --- ---------------------------------------------------------- | |
3501 | * 0 0 Add match criteria based on value in a field. | |
3502 | * 1 0 Add match criteria based on an immediate value. | |
3503 | * 0 1 Add NXAST_REG_LOAD action to copy field into a different field. | |
3504 | * 1 1 Add NXAST_REG_LOAD action to load immediate value into a field. | |
3505 | * 0 2 Add OFPAT_OUTPUT action to output to port from specified field. | |
3506 | * All other combinations are undefined and not allowed. | |
3507 | * | |
3508 | * The flow_mod_spec header is followed by a source specification and a | |
3509 | * destination specification. The format and meaning of the source | |
3510 | * specification depends on 'src': | |
3511 | * | |
3512 | * - If 'src' is 0, the source bits are taken from a field in the flow to | |
3513 | * which this action is attached. (This should be a wildcarded field. If | |
3514 | * its value is fully specified then the source bits being copied have | |
3515 | * constant values.) | |
3516 | * | |
3517 | * The source specification is an ovs_be32 'field' and an ovs_be16 'ofs'. | |
3518 | * 'field' is an nxm_header with nxm_hasmask=0, and 'ofs' the starting bit | |
3519 | * offset within that field. The source bits are field[ofs:ofs+n_bits-1]. | |
3520 | * 'field' and 'ofs' are subject to the same restrictions as the source | |
3521 | * field in NXAST_REG_MOVE. | |
3522 | * | |
3523 | * - If 'src' is 1, the source bits are a constant value. The source | |
3524 | * specification is (n_bits+15)/16*2 bytes long. Taking those bytes as a | |
3525 | * number in network order, the source bits are the 'n_bits' | |
3526 | * least-significant bits. The switch will report an error if other bits | |
3527 | * in the constant are nonzero. | |
3528 | * | |
3529 | * The flow_mod_spec destination specification, for 'dst' of 0 or 1, is an | |
3530 | * ovs_be32 'field' and an ovs_be16 'ofs'. 'field' is an nxm_header with | |
3531 | * nxm_hasmask=0 and 'ofs' is a starting bit offset within that field. The | |
3532 | * meaning of the flow_mod_spec depends on 'dst': | |
3533 | * | |
3534 | * - If 'dst' is 0, the flow_mod_spec specifies match criteria for the new | |
3535 | * flow. The new flow matches only if bits field[ofs:ofs+n_bits-1] in a | |
3536 | * packet equal the source bits. 'field' may be any nxm_header with | |
3537 | * nxm_hasmask=0 that is allowed in NXT_FLOW_MOD. | |
3538 | * | |
3539 | * Order is significant. Earlier flow_mod_specs must satisfy any | |
3540 | * prerequisites for matching fields specified later, by copying constant | |
3541 | * values into prerequisite fields. | |
3542 | * | |
3543 | * The switch will reject flow_mod_specs that do not satisfy NXM masking | |
3544 | * restrictions. | |
3545 | * | |
3546 | * - If 'dst' is 1, the flow_mod_spec specifies an NXAST_REG_LOAD action for | |
3547 | * the new flow. The new flow copies the source bits into | |
3548 | * field[ofs:ofs+n_bits-1]. Actions are executed in the same order as the | |
3549 | * flow_mod_specs. | |
3550 | * | |
3551 | * A single NXAST_REG_LOAD action writes no more than 64 bits, so n_bits | |
3552 | * greater than 64 yields multiple NXAST_REG_LOAD actions. | |
3553 | * | |
3554 | * The flow_mod_spec destination spec for 'dst' of 2 (when 'src' is 0) is | |
3555 | * empty. It has the following meaning: | |
3556 | * | |
3557 | * - The flow_mod_spec specifies an OFPAT_OUTPUT action for the new flow. | |
3558 | * The new flow outputs to the OpenFlow port specified by the source field. | |
3559 | * Of the special output ports with value OFPP_MAX or larger, OFPP_IN_PORT, | |
3560 | * OFPP_FLOOD, OFPP_LOCAL, and OFPP_ALL are supported. Other special ports | |
3561 | * may not be used. | |
3562 | * | |
3563 | * Resource Management | |
3564 | * ------------------- | |
3565 | * | |
3566 | * A switch has a finite amount of flow table space available for learning. | |
3567 | * When this space is exhausted, no new learning table entries will be learned | |
3568 | * until some existing flow table entries expire. The controller should be | |
3569 | * prepared to handle this by flooding (which can be implemented as a | |
3570 | * low-priority flow). | |
3571 | * | |
3572 | * If a learned flow matches a single TCP stream with a relatively long | |
3573 | * timeout, one may make the best of resource constraints by setting | |
3574 | * 'fin_idle_timeout' or 'fin_hard_timeout' (both measured in seconds), or | |
3575 | * both, to shorter timeouts. When either of these is specified as a nonzero | |
3576 | * value, OVS adds a NXAST_FIN_TIMEOUT action, with the specified timeouts, to | |
3577 | * the learned flow. | |
3578 | * | |
3579 | * Examples | |
3580 | * -------- | |
3581 | * | |
3582 | * The following examples give a prose description of the flow_mod_specs along | |
3583 | * with informal notation for how those would be represented and a hex dump of | |
3584 | * the bytes that would be required. | |
3585 | * | |
3586 | * These examples could work with various nx_action_learn parameters. Typical | |
3587 | * values would be idle_timeout=OFP_FLOW_PERMANENT, hard_timeout=60, | |
3588 | * priority=OFP_DEFAULT_PRIORITY, flags=0, table_id=10. | |
3589 | * | |
3590 | * 1. Learn input port based on the source MAC, with lookup into | |
3591 | * NXM_NX_REG1[16:31] by resubmit to in_port=99: | |
3592 | * | |
3593 | * Match on in_port=99: | |
3594 | * ovs_be16(src=1, dst=0, n_bits=16), 20 10 | |
3595 | * ovs_be16(99), 00 63 | |
3596 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3597 | * | |
3598 | * Match Ethernet destination on Ethernet source from packet: | |
3599 | * ovs_be16(src=0, dst=0, n_bits=48), 00 30 | |
3600 | * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00 | |
3601 | * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00 | |
3602 | * | |
3603 | * Set NXM_NX_REG1[16:31] to the packet's input port: | |
3604 | * ovs_be16(src=0, dst=1, n_bits=16), 08 10 | |
3605 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3606 | * ovs_be32(NXM_NX_REG1), ovs_be16(16) 00 01 02 04 00 10 | |
3607 | * | |
3608 | * Given a packet that arrived on port A with Ethernet source address B, | |
3609 | * this would set up the flow "in_port=99, dl_dst=B, | |
3610 | * actions=load:A->NXM_NX_REG1[16..31]". | |
3611 | * | |
3612 | * In syntax accepted by ovs-ofctl, this action is: learn(in_port=99, | |
3613 | * NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], | |
3614 | * load:NXM_OF_IN_PORT[]->NXM_NX_REG1[16..31]) | |
3615 | * | |
3616 | * 2. Output to input port based on the source MAC and VLAN VID, with lookup | |
3617 | * into NXM_NX_REG1[16:31]: | |
3618 | * | |
3619 | * Match on same VLAN ID as packet: | |
3620 | * ovs_be16(src=0, dst=0, n_bits=12), 00 0c | |
3621 | * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00 | |
3622 | * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00 | |
3623 | * | |
3624 | * Match Ethernet destination on Ethernet source from packet: | |
3625 | * ovs_be16(src=0, dst=0, n_bits=48), 00 30 | |
3626 | * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00 | |
3627 | * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00 | |
3628 | * | |
3629 | * Output to the packet's input port: | |
3630 | * ovs_be16(src=0, dst=2, n_bits=16), 10 10 | |
3631 | * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00 | |
3632 | * | |
3633 | * Given a packet that arrived on port A with Ethernet source address B in | |
3634 | * VLAN C, this would set up the flow "dl_dst=B, vlan_vid=C, | |
3635 | * actions=output:A". | |
3636 | * | |
3637 | * In syntax accepted by ovs-ofctl, this action is: | |
3638 | * learn(NXM_OF_VLAN_TCI[0..11], NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], | |
3639 | * output:NXM_OF_IN_PORT[]) | |
3640 | * | |
3641 | * 3. Here's a recipe for a very simple-minded MAC learning switch. It uses a | |
3642 | * 10-second MAC expiration time to make it easier to see what's going on | |
3643 | * | |
3644 | * ovs-vsctl del-controller br0 | |
3645 | * ovs-ofctl del-flows br0 | |
3646 | * ovs-ofctl add-flow br0 "table=0 actions=learn(table=1, \ | |
3647 | hard_timeout=10, NXM_OF_VLAN_TCI[0..11], \ | |
3648 | NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], \ | |
3649 | output:NXM_OF_IN_PORT[]), resubmit(,1)" | |
3650 | * ovs-ofctl add-flow br0 "table=1 priority=0 actions=flood" | |
3651 | * | |
3652 | * You can then dump the MAC learning table with: | |
3653 | * | |
3654 | * ovs-ofctl dump-flows br0 table=1 | |
3655 | * | |
3656 | * Usage Advice | |
3657 | * ------------ | |
3658 | * | |
3659 | * For best performance, segregate learned flows into a table that is not used | |
3660 | * for any other flows except possibly for a lowest-priority "catch-all" flow | |
3661 | * (a flow with no match criteria). If different learning actions specify | |
3662 | * different match criteria, use different tables for the learned flows. | |
3663 | * | |
3664 | * The meaning of 'hard_timeout' and 'idle_timeout' can be counterintuitive. | |
3665 | * These timeouts apply to the flow that is added, which means that a flow with | |
3666 | * an idle timeout will expire when no traffic has been sent *to* the learned | |
3667 | * address. This is not usually the intent in MAC learning; instead, we want | |
3668 | * the MAC learn entry to expire when no traffic has been sent *from* the | |
3669 | * learned address. Use a hard timeout for that. | |
39c94593 JR |
3670 | * |
3671 | * | |
3672 | * Visibility of Changes | |
3673 | * --------------------- | |
3674 | * | |
3675 | * Prior to Open vSwitch 2.4, any changes made by a "learn" action in a given | |
3676 | * flow translation are visible to flow table lookups made later in the flow | |
3677 | * translation. This means that, in the example above, a MAC learned by the | |
3678 | * learn action in table 0 would be found in table 1 (if the packet being | |
3679 | * processed had the same source and destination MAC address). | |
3680 | * | |
3681 | * In Open vSwitch 2.4 and later, changes to a flow table (whether to add or | |
3682 | * modify a flow) by a "learn" action are visible only for later flow | |
3683 | * translations, not for later lookups within the same flow translation. In | |
3684 | * the MAC learning example, a MAC learned by the learn action in table 0 would | |
3685 | * not be found in table 1 if the flow translation would resubmit to table 1 | |
3686 | * after the processing of the learn action, meaning that if this MAC had not | |
3687 | * been learned before then the packet would be flooded. */ | |
c2d936a4 BP |
3688 | struct nx_action_learn { |
3689 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3690 | ovs_be16 len; /* At least 24. */ | |
3691 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3692 | ovs_be16 subtype; /* NXAST_LEARN. */ | |
3693 | ovs_be16 idle_timeout; /* Idle time before discarding (seconds). */ | |
3694 | ovs_be16 hard_timeout; /* Max time before discarding (seconds). */ | |
3695 | ovs_be16 priority; /* Priority level of flow entry. */ | |
3696 | ovs_be64 cookie; /* Cookie for new flow. */ | |
3697 | ovs_be16 flags; /* NX_LEARN_F_*. */ | |
3698 | uint8_t table_id; /* Table to insert flow entry. */ | |
3699 | uint8_t pad; /* Must be zero. */ | |
3700 | ovs_be16 fin_idle_timeout; /* Idle timeout after FIN, if nonzero. */ | |
3701 | ovs_be16 fin_hard_timeout; /* Hard timeout after FIN, if nonzero. */ | |
3702 | /* Followed by a sequence of flow_mod_spec elements, as described above, | |
3703 | * until the end of the action is reached. */ | |
3704 | }; | |
3705 | OFP_ASSERT(sizeof(struct nx_action_learn) == 32); | |
3706 | ||
3707 | static ovs_be16 | |
3708 | get_be16(const void **pp) | |
3709 | { | |
3710 | const ovs_be16 *p = *pp; | |
3711 | ovs_be16 value = *p; | |
3712 | *pp = p + 1; | |
3713 | return value; | |
3714 | } | |
3715 | ||
3716 | static ovs_be32 | |
3717 | get_be32(const void **pp) | |
3718 | { | |
3719 | const ovs_be32 *p = *pp; | |
3720 | ovs_be32 value = get_unaligned_be32(p); | |
3721 | *pp = p + 1; | |
3722 | return value; | |
3723 | } | |
3724 | ||
3725 | static void | |
3726 | get_subfield(int n_bits, const void **p, struct mf_subfield *sf) | |
3727 | { | |
3728 | sf->field = mf_from_nxm_header(ntohl(get_be32(p))); | |
3729 | sf->ofs = ntohs(get_be16(p)); | |
3730 | sf->n_bits = n_bits; | |
3731 | } | |
3732 | ||
3733 | static unsigned int | |
3734 | learn_min_len(uint16_t header) | |
3735 | { | |
3736 | int n_bits = header & NX_LEARN_N_BITS_MASK; | |
3737 | int src_type = header & NX_LEARN_SRC_MASK; | |
3738 | int dst_type = header & NX_LEARN_DST_MASK; | |
3739 | unsigned int min_len; | |
3740 | ||
3741 | min_len = 0; | |
3742 | if (src_type == NX_LEARN_SRC_FIELD) { | |
3743 | min_len += sizeof(ovs_be32); /* src_field */ | |
3744 | min_len += sizeof(ovs_be16); /* src_ofs */ | |
3745 | } else { | |
3746 | min_len += DIV_ROUND_UP(n_bits, 16); | |
3747 | } | |
3748 | if (dst_type == NX_LEARN_DST_MATCH || | |
3749 | dst_type == NX_LEARN_DST_LOAD) { | |
3750 | min_len += sizeof(ovs_be32); /* dst_field */ | |
3751 | min_len += sizeof(ovs_be16); /* dst_ofs */ | |
3752 | } | |
3753 | return min_len; | |
3754 | } | |
3755 | ||
3756 | /* Converts 'nal' into a "struct ofpact_learn" and appends that struct to | |
3757 | * 'ofpacts'. Returns 0 if successful, otherwise an OFPERR_*. */ | |
3758 | static enum ofperr | |
3759 | decode_NXAST_RAW_LEARN(const struct nx_action_learn *nal, | |
3760 | struct ofpbuf *ofpacts) | |
3761 | { | |
3762 | struct ofpact_learn *learn; | |
3763 | const void *p, *end; | |
3764 | ||
3765 | if (nal->pad) { | |
3766 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3767 | } | |
3768 | ||
3769 | learn = ofpact_put_LEARN(ofpacts); | |
3770 | ||
3771 | learn->idle_timeout = ntohs(nal->idle_timeout); | |
3772 | learn->hard_timeout = ntohs(nal->hard_timeout); | |
3773 | learn->priority = ntohs(nal->priority); | |
3774 | learn->cookie = nal->cookie; | |
3775 | learn->table_id = nal->table_id; | |
3776 | learn->fin_idle_timeout = ntohs(nal->fin_idle_timeout); | |
3777 | learn->fin_hard_timeout = ntohs(nal->fin_hard_timeout); | |
3778 | ||
3779 | learn->flags = ntohs(nal->flags); | |
3780 | if (learn->flags & ~(NX_LEARN_F_SEND_FLOW_REM | | |
3781 | NX_LEARN_F_DELETE_LEARNED)) { | |
3782 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3783 | } | |
3784 | ||
3785 | if (learn->table_id == 0xff) { | |
3786 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3787 | } | |
3788 | ||
3789 | end = (char *) nal + ntohs(nal->len); | |
3790 | for (p = nal + 1; p != end; ) { | |
3791 | struct ofpact_learn_spec *spec; | |
3792 | uint16_t header = ntohs(get_be16(&p)); | |
3793 | ||
3794 | if (!header) { | |
3795 | break; | |
3796 | } | |
3797 | ||
3798 | spec = ofpbuf_put_zeros(ofpacts, sizeof *spec); | |
6fd6ed71 | 3799 | learn = ofpacts->header; |
c2d936a4 BP |
3800 | learn->n_specs++; |
3801 | ||
3802 | spec->src_type = header & NX_LEARN_SRC_MASK; | |
3803 | spec->dst_type = header & NX_LEARN_DST_MASK; | |
3804 | spec->n_bits = header & NX_LEARN_N_BITS_MASK; | |
3805 | ||
3806 | /* Check for valid src and dst type combination. */ | |
3807 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
3808 | spec->dst_type == NX_LEARN_DST_LOAD || | |
3809 | (spec->dst_type == NX_LEARN_DST_OUTPUT && | |
3810 | spec->src_type == NX_LEARN_SRC_FIELD)) { | |
3811 | /* OK. */ | |
3812 | } else { | |
3813 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3814 | } | |
3815 | ||
3816 | /* Check that the arguments don't overrun the end of the action. */ | |
3817 | if ((char *) end - (char *) p < learn_min_len(header)) { | |
3818 | return OFPERR_OFPBAC_BAD_LEN; | |
3819 | } | |
3820 | ||
3821 | /* Get the source. */ | |
3822 | if (spec->src_type == NX_LEARN_SRC_FIELD) { | |
3823 | get_subfield(spec->n_bits, &p, &spec->src); | |
3824 | } else { | |
3825 | int p_bytes = 2 * DIV_ROUND_UP(spec->n_bits, 16); | |
3826 | ||
3827 | bitwise_copy(p, p_bytes, 0, | |
3828 | &spec->src_imm, sizeof spec->src_imm, 0, | |
3829 | spec->n_bits); | |
3830 | p = (const uint8_t *) p + p_bytes; | |
3831 | } | |
3832 | ||
3833 | /* Get the destination. */ | |
3834 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
3835 | spec->dst_type == NX_LEARN_DST_LOAD) { | |
3836 | get_subfield(spec->n_bits, &p, &spec->dst); | |
3837 | } | |
3838 | } | |
3839 | ofpact_update_len(ofpacts, &learn->ofpact); | |
3840 | ||
3841 | if (!is_all_zeros(p, (char *) end - (char *) p)) { | |
3842 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
3843 | } | |
3844 | ||
3845 | return 0; | |
3846 | } | |
3847 | ||
3848 | static void | |
3849 | put_be16(struct ofpbuf *b, ovs_be16 x) | |
3850 | { | |
3851 | ofpbuf_put(b, &x, sizeof x); | |
3852 | } | |
3853 | ||
3854 | static void | |
3855 | put_be32(struct ofpbuf *b, ovs_be32 x) | |
3856 | { | |
3857 | ofpbuf_put(b, &x, sizeof x); | |
3858 | } | |
3859 | ||
3860 | static void | |
3861 | put_u16(struct ofpbuf *b, uint16_t x) | |
3862 | { | |
3863 | put_be16(b, htons(x)); | |
3864 | } | |
3865 | ||
3866 | static void | |
3867 | put_u32(struct ofpbuf *b, uint32_t x) | |
3868 | { | |
3869 | put_be32(b, htonl(x)); | |
3870 | } | |
3871 | ||
3872 | static void | |
3873 | encode_LEARN(const struct ofpact_learn *learn, | |
3874 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
3875 | { | |
3876 | const struct ofpact_learn_spec *spec; | |
3877 | struct nx_action_learn *nal; | |
3878 | size_t start_ofs; | |
3879 | ||
6fd6ed71 | 3880 | start_ofs = out->size; |
c2d936a4 BP |
3881 | nal = put_NXAST_LEARN(out); |
3882 | nal->idle_timeout = htons(learn->idle_timeout); | |
3883 | nal->hard_timeout = htons(learn->hard_timeout); | |
3884 | nal->fin_idle_timeout = htons(learn->fin_idle_timeout); | |
3885 | nal->fin_hard_timeout = htons(learn->fin_hard_timeout); | |
3886 | nal->priority = htons(learn->priority); | |
3887 | nal->cookie = learn->cookie; | |
3888 | nal->flags = htons(learn->flags); | |
3889 | nal->table_id = learn->table_id; | |
3890 | ||
3891 | for (spec = learn->specs; spec < &learn->specs[learn->n_specs]; spec++) { | |
3892 | put_u16(out, spec->n_bits | spec->dst_type | spec->src_type); | |
3893 | ||
3894 | if (spec->src_type == NX_LEARN_SRC_FIELD) { | |
508a9338 | 3895 | put_u32(out, mf_nxm_header(spec->src.field->id)); |
c2d936a4 BP |
3896 | put_u16(out, spec->src.ofs); |
3897 | } else { | |
3898 | size_t n_dst_bytes = 2 * DIV_ROUND_UP(spec->n_bits, 16); | |
3899 | uint8_t *bits = ofpbuf_put_zeros(out, n_dst_bytes); | |
3900 | bitwise_copy(&spec->src_imm, sizeof spec->src_imm, 0, | |
3901 | bits, n_dst_bytes, 0, | |
3902 | spec->n_bits); | |
3903 | } | |
3904 | ||
3905 | if (spec->dst_type == NX_LEARN_DST_MATCH || | |
3906 | spec->dst_type == NX_LEARN_DST_LOAD) { | |
508a9338 | 3907 | put_u32(out, mf_nxm_header(spec->dst.field->id)); |
c2d936a4 BP |
3908 | put_u16(out, spec->dst.ofs); |
3909 | } | |
3910 | } | |
3911 | ||
178742f9 | 3912 | pad_ofpat(out, start_ofs); |
c2d936a4 BP |
3913 | } |
3914 | ||
cab50449 | 3915 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
3916 | parse_LEARN(char *arg, struct ofpbuf *ofpacts, |
3917 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3918 | { | |
3919 | return learn_parse(arg, ofpacts); | |
3920 | } | |
3921 | ||
3922 | static void | |
3923 | format_LEARN(const struct ofpact_learn *a, struct ds *s) | |
3924 | { | |
3925 | learn_format(a, s); | |
3926 | } | |
3927 | \f | |
18080541 BP |
3928 | /* Action structure for NXAST_CONJUNCTION. */ |
3929 | struct nx_action_conjunction { | |
3930 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
3931 | ovs_be16 len; /* At least 16. */ | |
3932 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
3933 | ovs_be16 subtype; /* See enum ofp_raw_action_type. */ | |
3934 | uint8_t clause; | |
3935 | uint8_t n_clauses; | |
3936 | ovs_be32 id; | |
3937 | }; | |
3938 | OFP_ASSERT(sizeof(struct nx_action_conjunction) == 16); | |
3939 | ||
3940 | static void | |
3941 | add_conjunction(struct ofpbuf *out, | |
3942 | uint32_t id, uint8_t clause, uint8_t n_clauses) | |
3943 | { | |
3944 | struct ofpact_conjunction *oc; | |
3945 | ||
3946 | oc = ofpact_put_CONJUNCTION(out); | |
3947 | oc->id = id; | |
3948 | oc->clause = clause; | |
3949 | oc->n_clauses = n_clauses; | |
3950 | } | |
3951 | ||
3952 | static enum ofperr | |
3953 | decode_NXAST_RAW_CONJUNCTION(const struct nx_action_conjunction *nac, | |
3954 | struct ofpbuf *out) | |
3955 | { | |
3956 | if (nac->n_clauses < 2 || nac->n_clauses > 64 | |
3957 | || nac->clause >= nac->n_clauses) { | |
3958 | return OFPERR_NXBAC_BAD_CONJUNCTION; | |
3959 | } else { | |
3960 | add_conjunction(out, ntohl(nac->id), nac->clause, nac->n_clauses); | |
3961 | return 0; | |
3962 | } | |
3963 | } | |
3964 | ||
3965 | static void | |
3966 | encode_CONJUNCTION(const struct ofpact_conjunction *oc, | |
3967 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
3968 | { | |
3969 | struct nx_action_conjunction *nac = put_NXAST_CONJUNCTION(out); | |
3970 | nac->clause = oc->clause; | |
3971 | nac->n_clauses = oc->n_clauses; | |
3972 | nac->id = htonl(oc->id); | |
3973 | } | |
3974 | ||
3975 | static void | |
3976 | format_CONJUNCTION(const struct ofpact_conjunction *oc, struct ds *s) | |
3977 | { | |
3978 | ds_put_format(s, "conjunction(%"PRIu32",%"PRIu8"/%"PRIu8")", | |
3979 | oc->id, oc->clause + 1, oc->n_clauses); | |
3980 | } | |
3981 | ||
3982 | static char * OVS_WARN_UNUSED_RESULT | |
3983 | parse_CONJUNCTION(const char *arg, struct ofpbuf *ofpacts, | |
3984 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
3985 | { | |
3986 | uint8_t n_clauses; | |
3987 | uint8_t clause; | |
3988 | uint32_t id; | |
3989 | int n; | |
3990 | ||
3991 | if (!ovs_scan(arg, "%"SCNi32" , %"SCNu8" / %"SCNu8" %n", | |
3992 | &id, &clause, &n_clauses, &n) || n != strlen(arg)) { | |
3993 | return xstrdup("\"conjunction\" syntax is \"conjunction(id,i/n)\""); | |
3994 | } | |
3995 | ||
3996 | if (n_clauses < 2) { | |
3997 | return xstrdup("conjunction must have at least 2 clauses"); | |
3998 | } else if (n_clauses > 64) { | |
3999 | return xstrdup("conjunction must have at most 64 clauses"); | |
4000 | } else if (clause < 1) { | |
4001 | return xstrdup("clause index must be positive"); | |
4002 | } else if (clause > n_clauses) { | |
4003 | return xstrdup("clause index must be less than or equal to " | |
4004 | "number of clauses"); | |
4005 | } | |
4006 | ||
4007 | add_conjunction(ofpacts, id, clause - 1, n_clauses); | |
4008 | return NULL; | |
4009 | } | |
4010 | \f | |
c2d936a4 BP |
4011 | /* Action structure for NXAST_MULTIPATH. |
4012 | * | |
4013 | * This action performs the following steps in sequence: | |
4014 | * | |
4015 | * 1. Hashes the fields designated by 'fields', one of NX_HASH_FIELDS_*. | |
4016 | * Refer to the definition of "enum nx_mp_fields" for details. | |
4017 | * | |
4018 | * The 'basis' value is used as a universal hash parameter, that is, | |
4019 | * different values of 'basis' yield different hash functions. The | |
4020 | * particular universal hash function used is implementation-defined. | |
4021 | * | |
4022 | * The hashed fields' values are drawn from the current state of the | |
4023 | * flow, including all modifications that have been made by actions up to | |
4024 | * this point. | |
4025 | * | |
4026 | * 2. Applies the multipath link choice algorithm specified by 'algorithm', | |
4027 | * one of NX_MP_ALG_*. Refer to the definition of "enum nx_mp_algorithm" | |
4028 | * for details. | |
4029 | * | |
4030 | * The output of the algorithm is 'link', an unsigned integer less than | |
4031 | * or equal to 'max_link'. | |
4032 | * | |
4033 | * Some algorithms use 'arg' as an additional argument. | |
4034 | * | |
4035 | * 3. Stores 'link' in dst[ofs:ofs+n_bits]. The format and semantics of | |
4036 | * 'dst' and 'ofs_nbits' are similar to those for the NXAST_REG_LOAD | |
4037 | * action. | |
4038 | * | |
4039 | * The switch will reject actions that have an unknown 'fields', or an unknown | |
4040 | * 'algorithm', or in which ofs+n_bits is greater than the width of 'dst', or | |
4041 | * in which 'max_link' is greater than or equal to 2**n_bits, with error type | |
4042 | * OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT. | |
4043 | */ | |
4044 | struct nx_action_multipath { | |
4045 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4046 | ovs_be16 len; /* Length is 32. */ | |
4047 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4048 | ovs_be16 subtype; /* NXAST_MULTIPATH. */ | |
4049 | ||
4050 | /* What fields to hash and how. */ | |
4051 | ovs_be16 fields; /* One of NX_HASH_FIELDS_*. */ | |
4052 | ovs_be16 basis; /* Universal hash parameter. */ | |
4053 | ovs_be16 pad0; | |
4054 | ||
4055 | /* Multipath link choice algorithm to apply to hash value. */ | |
4056 | ovs_be16 algorithm; /* One of NX_MP_ALG_*. */ | |
4057 | ovs_be16 max_link; /* Number of output links, minus 1. */ | |
4058 | ovs_be32 arg; /* Algorithm-specific argument. */ | |
4059 | ovs_be16 pad1; | |
4060 | ||
4061 | /* Where to store the result. */ | |
4062 | ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */ | |
4063 | ovs_be32 dst; /* Destination. */ | |
4064 | }; | |
4065 | OFP_ASSERT(sizeof(struct nx_action_multipath) == 32); | |
4066 | ||
4067 | static enum ofperr | |
4068 | decode_NXAST_RAW_MULTIPATH(const struct nx_action_multipath *nam, | |
4069 | struct ofpbuf *out) | |
4070 | { | |
4071 | uint32_t n_links = ntohs(nam->max_link) + 1; | |
4072 | size_t min_n_bits = log_2_ceil(n_links); | |
4073 | struct ofpact_multipath *mp; | |
4074 | ||
4075 | mp = ofpact_put_MULTIPATH(out); | |
4076 | mp->fields = ntohs(nam->fields); | |
4077 | mp->basis = ntohs(nam->basis); | |
4078 | mp->algorithm = ntohs(nam->algorithm); | |
4079 | mp->max_link = ntohs(nam->max_link); | |
4080 | mp->arg = ntohl(nam->arg); | |
4081 | mp->dst.field = mf_from_nxm_header(ntohl(nam->dst)); | |
4082 | mp->dst.ofs = nxm_decode_ofs(nam->ofs_nbits); | |
4083 | mp->dst.n_bits = nxm_decode_n_bits(nam->ofs_nbits); | |
4084 | ||
4085 | if (!flow_hash_fields_valid(mp->fields)) { | |
4086 | VLOG_WARN_RL(&rl, "unsupported fields %d", (int) mp->fields); | |
4087 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4088 | } else if (mp->algorithm != NX_MP_ALG_MODULO_N | |
4089 | && mp->algorithm != NX_MP_ALG_HASH_THRESHOLD | |
4090 | && mp->algorithm != NX_MP_ALG_HRW | |
4091 | && mp->algorithm != NX_MP_ALG_ITER_HASH) { | |
4092 | VLOG_WARN_RL(&rl, "unsupported algorithm %d", (int) mp->algorithm); | |
4093 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4094 | } else if (mp->dst.n_bits < min_n_bits) { | |
4095 | VLOG_WARN_RL(&rl, "multipath action requires at least %"PRIuSIZE" bits for " | |
4096 | "%"PRIu32" links", min_n_bits, n_links); | |
4097 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4098 | } | |
4099 | ||
4100 | return multipath_check(mp, NULL); | |
4101 | } | |
4102 | ||
4103 | static void | |
4104 | encode_MULTIPATH(const struct ofpact_multipath *mp, | |
4105 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4106 | { | |
4107 | struct nx_action_multipath *nam = put_NXAST_MULTIPATH(out); | |
4108 | ||
4109 | nam->fields = htons(mp->fields); | |
4110 | nam->basis = htons(mp->basis); | |
4111 | nam->algorithm = htons(mp->algorithm); | |
4112 | nam->max_link = htons(mp->max_link); | |
4113 | nam->arg = htonl(mp->arg); | |
4114 | nam->ofs_nbits = nxm_encode_ofs_nbits(mp->dst.ofs, mp->dst.n_bits); | |
508a9338 | 4115 | nam->dst = htonl(mf_nxm_header(mp->dst.field->id)); |
c2d936a4 BP |
4116 | } |
4117 | ||
cab50449 | 4118 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4119 | parse_MULTIPATH(const char *arg, struct ofpbuf *ofpacts, |
4120 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4121 | { | |
4122 | return multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg); | |
4123 | } | |
4124 | ||
4125 | static void | |
4126 | format_MULTIPATH(const struct ofpact_multipath *a, struct ds *s) | |
4127 | { | |
4128 | multipath_format(a, s); | |
4129 | } | |
4130 | \f | |
4131 | /* Action structure for NXAST_NOTE. | |
4132 | * | |
4133 | * This action has no effect. It is variable length. The switch does not | |
4134 | * attempt to interpret the user-defined 'note' data in any way. A controller | |
4135 | * can use this action to attach arbitrary metadata to a flow. | |
4136 | * | |
4137 | * This action might go away in the future. | |
4138 | */ | |
4139 | struct nx_action_note { | |
4140 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4141 | ovs_be16 len; /* A multiple of 8, but at least 16. */ | |
4142 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4143 | ovs_be16 subtype; /* NXAST_NOTE. */ | |
4144 | uint8_t note[6]; /* Start of user-defined data. */ | |
4145 | /* Possibly followed by additional user-defined data. */ | |
4146 | }; | |
4147 | OFP_ASSERT(sizeof(struct nx_action_note) == 16); | |
4148 | ||
4149 | static enum ofperr | |
4150 | decode_NXAST_RAW_NOTE(const struct nx_action_note *nan, struct ofpbuf *out) | |
4151 | { | |
4152 | struct ofpact_note *note; | |
4153 | unsigned int length; | |
4154 | ||
4155 | length = ntohs(nan->len) - offsetof(struct nx_action_note, note); | |
4156 | note = ofpact_put(out, OFPACT_NOTE, | |
4157 | offsetof(struct ofpact_note, data) + length); | |
4158 | note->length = length; | |
4159 | memcpy(note->data, nan->note, length); | |
4160 | ||
4161 | return 0; | |
4162 | } | |
4163 | ||
4164 | static void | |
4165 | encode_NOTE(const struct ofpact_note *note, | |
4166 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4167 | { | |
6fd6ed71 | 4168 | size_t start_ofs = out->size; |
c2d936a4 BP |
4169 | struct nx_action_note *nan; |
4170 | unsigned int remainder; | |
4171 | unsigned int len; | |
4172 | ||
4173 | put_NXAST_NOTE(out); | |
6fd6ed71 | 4174 | out->size = out->size - sizeof nan->note; |
c2d936a4 BP |
4175 | |
4176 | ofpbuf_put(out, note->data, note->length); | |
4177 | ||
6fd6ed71 | 4178 | len = out->size - start_ofs; |
c2d936a4 BP |
4179 | remainder = len % OFP_ACTION_ALIGN; |
4180 | if (remainder) { | |
4181 | ofpbuf_put_zeros(out, OFP_ACTION_ALIGN - remainder); | |
4182 | } | |
4183 | nan = ofpbuf_at(out, start_ofs, sizeof *nan); | |
6fd6ed71 | 4184 | nan->len = htons(out->size - start_ofs); |
c2d936a4 BP |
4185 | } |
4186 | ||
cab50449 | 4187 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4188 | parse_NOTE(const char *arg, struct ofpbuf *ofpacts, |
4189 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4190 | { | |
4191 | struct ofpact_note *note; | |
4192 | ||
4193 | note = ofpact_put_NOTE(ofpacts); | |
4194 | while (*arg != '\0') { | |
4195 | uint8_t byte; | |
4196 | bool ok; | |
4197 | ||
4198 | if (*arg == '.') { | |
4199 | arg++; | |
4200 | } | |
4201 | if (*arg == '\0') { | |
4202 | break; | |
4203 | } | |
4204 | ||
4205 | byte = hexits_value(arg, 2, &ok); | |
4206 | if (!ok) { | |
4207 | return xstrdup("bad hex digit in `note' argument"); | |
4208 | } | |
4209 | ofpbuf_put(ofpacts, &byte, 1); | |
4210 | ||
6fd6ed71 | 4211 | note = ofpacts->header; |
c2d936a4 BP |
4212 | note->length++; |
4213 | ||
4214 | arg += 2; | |
4215 | } | |
4216 | ofpact_update_len(ofpacts, ¬e->ofpact); | |
4217 | return NULL; | |
4218 | } | |
4219 | ||
4220 | static void | |
4221 | format_NOTE(const struct ofpact_note *a, struct ds *s) | |
4222 | { | |
4223 | size_t i; | |
4224 | ||
4225 | ds_put_cstr(s, "note:"); | |
4226 | for (i = 0; i < a->length; i++) { | |
4227 | if (i) { | |
4228 | ds_put_char(s, '.'); | |
4229 | } | |
4230 | ds_put_format(s, "%02"PRIx8, a->data[i]); | |
4231 | } | |
4232 | } | |
4233 | \f | |
4234 | /* Exit action. */ | |
4235 | ||
4236 | static enum ofperr | |
4237 | decode_NXAST_RAW_EXIT(struct ofpbuf *out) | |
4238 | { | |
4239 | ofpact_put_EXIT(out); | |
4240 | return 0; | |
4241 | } | |
4242 | ||
4243 | static void | |
4244 | encode_EXIT(const struct ofpact_null *null OVS_UNUSED, | |
4245 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4246 | { | |
4247 | put_NXAST_EXIT(out); | |
4248 | } | |
4249 | ||
cab50449 | 4250 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4251 | parse_EXIT(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
4252 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4253 | { | |
4254 | ofpact_put_EXIT(ofpacts); | |
4255 | return NULL; | |
4256 | } | |
4257 | ||
4258 | static void | |
4259 | format_EXIT(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
4260 | { | |
4261 | ds_put_cstr(s, "exit"); | |
4262 | } | |
4263 | \f | |
e672ff9b JR |
4264 | /* Unroll xlate action. */ |
4265 | ||
4266 | static void | |
4267 | encode_UNROLL_XLATE(const struct ofpact_unroll_xlate *unroll OVS_UNUSED, | |
4268 | enum ofp_version ofp_version OVS_UNUSED, | |
4269 | struct ofpbuf *out OVS_UNUSED) | |
4270 | { | |
4271 | OVS_NOT_REACHED(); | |
4272 | } | |
4273 | ||
4274 | static char * OVS_WARN_UNUSED_RESULT | |
4275 | parse_UNROLL_XLATE(char *arg OVS_UNUSED, struct ofpbuf *ofpacts OVS_UNUSED, | |
4276 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4277 | { | |
4278 | OVS_NOT_REACHED(); | |
4279 | return NULL; | |
4280 | } | |
4281 | ||
4282 | static void | |
4283 | format_UNROLL_XLATE(const struct ofpact_unroll_xlate *a OVS_UNUSED, | |
4284 | struct ds *s) | |
4285 | { | |
4286 | ds_put_cstr(s, "unroll_xlate"); | |
4287 | } | |
4288 | \f | |
c2d936a4 BP |
4289 | /* Action structure for NXAST_SAMPLE. |
4290 | * | |
4291 | * Samples matching packets with the given probability and sends them | |
4292 | * each to the set of collectors identified with the given ID. The | |
4293 | * probability is expressed as a number of packets to be sampled out | |
4294 | * of USHRT_MAX packets, and must be >0. | |
4295 | * | |
4296 | * When sending packet samples to IPFIX collectors, the IPFIX flow | |
4297 | * record sent for each sampled packet is associated with the given | |
4298 | * observation domain ID and observation point ID. Each IPFIX flow | |
4299 | * record contain the sampled packet's headers when executing this | |
4300 | * rule. If a sampled packet's headers are modified by previous | |
4301 | * actions in the flow, those modified headers are sent. */ | |
4302 | struct nx_action_sample { | |
4303 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4304 | ovs_be16 len; /* Length is 24. */ | |
4305 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4306 | ovs_be16 subtype; /* NXAST_SAMPLE. */ | |
4307 | ovs_be16 probability; /* Fraction of packets to sample. */ | |
4308 | ovs_be32 collector_set_id; /* ID of collector set in OVSDB. */ | |
4309 | ovs_be32 obs_domain_id; /* ID of sampling observation domain. */ | |
4310 | ovs_be32 obs_point_id; /* ID of sampling observation point. */ | |
4311 | }; | |
4312 | OFP_ASSERT(sizeof(struct nx_action_sample) == 24); | |
4313 | ||
4314 | static enum ofperr | |
4315 | decode_NXAST_RAW_SAMPLE(const struct nx_action_sample *nas, struct ofpbuf *out) | |
4316 | { | |
4317 | struct ofpact_sample *sample; | |
4318 | ||
4319 | sample = ofpact_put_SAMPLE(out); | |
4320 | sample->probability = ntohs(nas->probability); | |
4321 | sample->collector_set_id = ntohl(nas->collector_set_id); | |
4322 | sample->obs_domain_id = ntohl(nas->obs_domain_id); | |
4323 | sample->obs_point_id = ntohl(nas->obs_point_id); | |
4324 | ||
4325 | if (sample->probability == 0) { | |
4326 | return OFPERR_OFPBAC_BAD_ARGUMENT; | |
4327 | } | |
4328 | ||
4329 | return 0; | |
4330 | } | |
4331 | ||
4332 | static void | |
4333 | encode_SAMPLE(const struct ofpact_sample *sample, | |
4334 | enum ofp_version ofp_version OVS_UNUSED, struct ofpbuf *out) | |
4335 | { | |
4336 | struct nx_action_sample *nas; | |
4337 | ||
4338 | nas = put_NXAST_SAMPLE(out); | |
4339 | nas->probability = htons(sample->probability); | |
4340 | nas->collector_set_id = htonl(sample->collector_set_id); | |
4341 | nas->obs_domain_id = htonl(sample->obs_domain_id); | |
4342 | nas->obs_point_id = htonl(sample->obs_point_id); | |
4343 | } | |
4344 | ||
4345 | /* Parses 'arg' as the argument to a "sample" action, and appends such an | |
4346 | * action to 'ofpacts'. | |
4347 | * | |
4348 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
4349 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 4350 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4351 | parse_SAMPLE(char *arg, struct ofpbuf *ofpacts, |
4352 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4353 | { | |
4354 | struct ofpact_sample *os = ofpact_put_SAMPLE(ofpacts); | |
4355 | char *key, *value; | |
4356 | ||
4357 | while (ofputil_parse_key_value(&arg, &key, &value)) { | |
4358 | char *error = NULL; | |
4359 | ||
4360 | if (!strcmp(key, "probability")) { | |
4361 | error = str_to_u16(value, "probability", &os->probability); | |
4362 | if (!error && os->probability == 0) { | |
4363 | error = xasprintf("invalid probability value \"%s\"", value); | |
4364 | } | |
4365 | } else if (!strcmp(key, "collector_set_id")) { | |
4366 | error = str_to_u32(value, &os->collector_set_id); | |
4367 | } else if (!strcmp(key, "obs_domain_id")) { | |
4368 | error = str_to_u32(value, &os->obs_domain_id); | |
4369 | } else if (!strcmp(key, "obs_point_id")) { | |
4370 | error = str_to_u32(value, &os->obs_point_id); | |
4371 | } else { | |
4372 | error = xasprintf("invalid key \"%s\" in \"sample\" argument", | |
4373 | key); | |
4374 | } | |
4375 | if (error) { | |
4376 | return error; | |
4377 | } | |
4378 | } | |
4379 | if (os->probability == 0) { | |
4380 | return xstrdup("non-zero \"probability\" must be specified on sample"); | |
4381 | } | |
4382 | return NULL; | |
4383 | } | |
4384 | ||
4385 | static void | |
4386 | format_SAMPLE(const struct ofpact_sample *a, struct ds *s) | |
4387 | { | |
4388 | ds_put_format(s, "sample(probability=%"PRIu16",collector_set_id=%"PRIu32 | |
4389 | ",obs_domain_id=%"PRIu32",obs_point_id=%"PRIu32")", | |
4390 | a->probability, a->collector_set_id, | |
4391 | a->obs_domain_id, a->obs_point_id); | |
4392 | } | |
4393 | \f | |
d4abaff5 BP |
4394 | /* debug_recirc instruction. */ |
4395 | ||
4396 | static bool enable_debug; | |
4397 | ||
4398 | void | |
4399 | ofpact_dummy_enable(void) | |
4400 | { | |
4401 | enable_debug = true; | |
4402 | } | |
4403 | ||
4404 | static enum ofperr | |
4405 | decode_NXAST_RAW_DEBUG_RECIRC(struct ofpbuf *out) | |
4406 | { | |
4407 | if (!enable_debug) { | |
4408 | return OFPERR_OFPBAC_BAD_VENDOR_TYPE; | |
4409 | } | |
4410 | ||
4411 | ofpact_put_DEBUG_RECIRC(out); | |
4412 | return 0; | |
4413 | } | |
4414 | ||
4415 | static void | |
4416 | encode_DEBUG_RECIRC(const struct ofpact_null *n OVS_UNUSED, | |
4417 | enum ofp_version ofp_version OVS_UNUSED, | |
4418 | struct ofpbuf *out) | |
4419 | { | |
4420 | put_NXAST_DEBUG_RECIRC(out); | |
4421 | } | |
4422 | ||
4423 | static char * OVS_WARN_UNUSED_RESULT | |
4424 | parse_DEBUG_RECIRC(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, | |
4425 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4426 | { | |
4427 | ofpact_put_DEBUG_RECIRC(ofpacts); | |
4428 | return NULL; | |
4429 | } | |
4430 | ||
4431 | static void | |
4432 | format_DEBUG_RECIRC(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
4433 | { | |
4434 | ds_put_cstr(s, "debug_recirc"); | |
4435 | } | |
4436 | \f | |
c2d936a4 BP |
4437 | /* Meter instruction. */ |
4438 | ||
4439 | static void | |
4440 | encode_METER(const struct ofpact_meter *meter, | |
4441 | enum ofp_version ofp_version, struct ofpbuf *out) | |
4442 | { | |
4443 | if (ofp_version >= OFP13_VERSION) { | |
4444 | instruction_put_OFPIT13_METER(out)->meter_id = htonl(meter->meter_id); | |
4445 | } | |
4446 | } | |
4447 | ||
cab50449 | 4448 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4449 | parse_METER(char *arg, struct ofpbuf *ofpacts, |
4450 | enum ofputil_protocol *usable_protocols) | |
4451 | { | |
4452 | *usable_protocols &= OFPUTIL_P_OF13_UP; | |
4453 | return str_to_u32(arg, &ofpact_put_METER(ofpacts)->meter_id); | |
4454 | } | |
4455 | ||
4456 | static void | |
4457 | format_METER(const struct ofpact_meter *a, struct ds *s) | |
4458 | { | |
4459 | ds_put_format(s, "meter:%"PRIu32, a->meter_id); | |
4460 | } | |
4461 | \f | |
4462 | /* Clear-Actions instruction. */ | |
4463 | ||
4464 | static void | |
4465 | encode_CLEAR_ACTIONS(const struct ofpact_null *null OVS_UNUSED, | |
4466 | enum ofp_version ofp_version OVS_UNUSED, | |
4467 | struct ofpbuf *out OVS_UNUSED) | |
4468 | { | |
4469 | if (ofp_version > OFP10_VERSION) { | |
4470 | instruction_put_OFPIT11_CLEAR_ACTIONS(out); | |
4471 | } | |
4472 | } | |
4473 | ||
cab50449 | 4474 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4475 | parse_CLEAR_ACTIONS(char *arg OVS_UNUSED, struct ofpbuf *ofpacts, |
4476 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4477 | { | |
4478 | ofpact_put_CLEAR_ACTIONS(ofpacts); | |
4479 | return NULL; | |
4480 | } | |
4481 | ||
4482 | static void | |
4483 | format_CLEAR_ACTIONS(const struct ofpact_null *a OVS_UNUSED, struct ds *s) | |
4484 | { | |
4485 | ds_put_cstr(s, "clear_actions"); | |
4486 | } | |
4487 | \f | |
4488 | /* Write-Actions instruction. */ | |
4489 | ||
4490 | static void | |
4491 | encode_WRITE_ACTIONS(const struct ofpact_nest *actions, | |
4492 | enum ofp_version ofp_version, struct ofpbuf *out) | |
4493 | { | |
4494 | if (ofp_version > OFP10_VERSION) { | |
6fd6ed71 | 4495 | const size_t ofs = out->size; |
c2d936a4 BP |
4496 | |
4497 | instruction_put_OFPIT11_WRITE_ACTIONS(out); | |
4498 | ofpacts_put_openflow_actions(actions->actions, | |
4499 | ofpact_nest_get_action_len(actions), | |
4500 | out, ofp_version); | |
4501 | ofpacts_update_instruction_actions(out, ofs); | |
4502 | } | |
4503 | } | |
4504 | ||
cab50449 | 4505 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4506 | parse_WRITE_ACTIONS(char *arg, struct ofpbuf *ofpacts, |
4507 | enum ofputil_protocol *usable_protocols) | |
4508 | { | |
4509 | struct ofpact_nest *on; | |
4510 | char *error; | |
4511 | size_t ofs; | |
4512 | ||
4513 | /* Pull off existing actions or instructions. */ | |
4514 | ofpact_pad(ofpacts); | |
6fd6ed71 | 4515 | ofs = ofpacts->size; |
c2d936a4 BP |
4516 | ofpbuf_pull(ofpacts, ofs); |
4517 | ||
4518 | /* Add a Write-Actions instruction and then pull it off. */ | |
4519 | ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS, sizeof *on); | |
4520 | ofpbuf_pull(ofpacts, sizeof *on); | |
4521 | ||
4522 | /* Parse nested actions. | |
4523 | * | |
4524 | * We pulled off "write-actions" and the previous actions because the | |
4525 | * OFPACT_WRITE_ACTIONS is only partially constructed: its length is such | |
4526 | * that it doesn't actually include the nested actions. That means that | |
4527 | * ofpacts_parse() would reject them as being part of an Apply-Actions that | |
4528 | * follows a Write-Actions, which is an invalid order. */ | |
4529 | error = ofpacts_parse(arg, ofpacts, usable_protocols, false); | |
4530 | ||
4531 | /* Put the Write-Actions back on and update its length. */ | |
4532 | on = ofpbuf_push_uninit(ofpacts, sizeof *on); | |
6fd6ed71 | 4533 | on->ofpact.len = ofpacts->size; |
c2d936a4 BP |
4534 | |
4535 | /* Put any previous actions or instructions back on. */ | |
4536 | ofpbuf_push_uninit(ofpacts, ofs); | |
4537 | ||
4538 | return error; | |
4539 | } | |
4540 | ||
4541 | static void | |
4542 | format_WRITE_ACTIONS(const struct ofpact_nest *a, struct ds *s) | |
4543 | { | |
4544 | ds_put_cstr(s, "write_actions("); | |
4545 | ofpacts_format(a->actions, ofpact_nest_get_action_len(a), s); | |
4546 | ds_put_char(s, ')'); | |
4547 | } | |
4548 | \f | |
4549 | /* Action structure for NXAST_WRITE_METADATA. | |
4550 | * | |
4551 | * Modifies the 'mask' bits of the metadata value. */ | |
4552 | struct nx_action_write_metadata { | |
4553 | ovs_be16 type; /* OFPAT_VENDOR. */ | |
4554 | ovs_be16 len; /* Length is 32. */ | |
4555 | ovs_be32 vendor; /* NX_VENDOR_ID. */ | |
4556 | ovs_be16 subtype; /* NXAST_WRITE_METADATA. */ | |
4557 | uint8_t zeros[6]; /* Must be zero. */ | |
4558 | ovs_be64 metadata; /* Metadata register. */ | |
4559 | ovs_be64 mask; /* Metadata mask. */ | |
4560 | }; | |
4561 | OFP_ASSERT(sizeof(struct nx_action_write_metadata) == 32); | |
4562 | ||
4563 | static enum ofperr | |
4564 | decode_NXAST_RAW_WRITE_METADATA(const struct nx_action_write_metadata *nawm, | |
4565 | struct ofpbuf *out) | |
4566 | { | |
4567 | struct ofpact_metadata *om; | |
4568 | ||
4569 | if (!is_all_zeros(nawm->zeros, sizeof nawm->zeros)) { | |
4570 | return OFPERR_NXBRC_MUST_BE_ZERO; | |
4571 | } | |
4572 | ||
4573 | om = ofpact_put_WRITE_METADATA(out); | |
4574 | om->metadata = nawm->metadata; | |
4575 | om->mask = nawm->mask; | |
4576 | ||
4577 | return 0; | |
4578 | } | |
4579 | ||
4580 | static void | |
4581 | encode_WRITE_METADATA(const struct ofpact_metadata *metadata, | |
4582 | enum ofp_version ofp_version, struct ofpbuf *out) | |
4583 | { | |
4584 | if (ofp_version == OFP10_VERSION) { | |
4585 | struct nx_action_write_metadata *nawm; | |
4586 | ||
4587 | nawm = put_NXAST_WRITE_METADATA(out); | |
4588 | nawm->metadata = metadata->metadata; | |
4589 | nawm->mask = metadata->mask; | |
4590 | } else { | |
4591 | struct ofp11_instruction_write_metadata *oiwm; | |
4592 | ||
4593 | oiwm = instruction_put_OFPIT11_WRITE_METADATA(out); | |
4594 | oiwm->metadata = metadata->metadata; | |
4595 | oiwm->metadata_mask = metadata->mask; | |
4596 | } | |
4597 | } | |
4598 | ||
cab50449 | 4599 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4600 | parse_WRITE_METADATA(char *arg, struct ofpbuf *ofpacts, |
4601 | enum ofputil_protocol *usable_protocols) | |
4602 | { | |
4603 | struct ofpact_metadata *om; | |
4604 | char *mask = strchr(arg, '/'); | |
4605 | ||
4606 | *usable_protocols &= OFPUTIL_P_NXM_OF11_UP; | |
4607 | ||
4608 | om = ofpact_put_WRITE_METADATA(ofpacts); | |
4609 | if (mask) { | |
4610 | char *error; | |
4611 | ||
4612 | *mask = '\0'; | |
4613 | error = str_to_be64(mask + 1, &om->mask); | |
4614 | if (error) { | |
4615 | return error; | |
4616 | } | |
4617 | } else { | |
4618 | om->mask = OVS_BE64_MAX; | |
4619 | } | |
4620 | ||
4621 | return str_to_be64(arg, &om->metadata); | |
4622 | } | |
4623 | ||
4624 | static void | |
4625 | format_WRITE_METADATA(const struct ofpact_metadata *a, struct ds *s) | |
4626 | { | |
4627 | ds_put_format(s, "write_metadata:%#"PRIx64, ntohll(a->metadata)); | |
4628 | if (a->mask != OVS_BE64_MAX) { | |
4629 | ds_put_format(s, "/%#"PRIx64, ntohll(a->mask)); | |
4630 | } | |
4cceacb9 | 4631 | } |
f25d0cf3 | 4632 | \f |
c2d936a4 | 4633 | /* Goto-Table instruction. */ |
f25d0cf3 BP |
4634 | |
4635 | static void | |
c2d936a4 BP |
4636 | encode_GOTO_TABLE(const struct ofpact_goto_table *goto_table, |
4637 | enum ofp_version ofp_version, struct ofpbuf *out) | |
f25d0cf3 | 4638 | { |
c2d936a4 BP |
4639 | if (ofp_version == OFP10_VERSION) { |
4640 | struct nx_action_resubmit *nar; | |
f25d0cf3 | 4641 | |
c2d936a4 BP |
4642 | nar = put_NXAST_RESUBMIT_TABLE(out); |
4643 | nar->table = goto_table->table_id; | |
4644 | nar->in_port = htons(ofp_to_u16(OFPP_IN_PORT)); | |
4645 | } else { | |
4646 | struct ofp11_instruction_goto_table *oigt; | |
4647 | ||
4648 | oigt = instruction_put_OFPIT11_GOTO_TABLE(out); | |
4649 | oigt->table_id = goto_table->table_id; | |
4650 | memset(oigt->pad, 0, sizeof oigt->pad); | |
4651 | } | |
4652 | } | |
4653 | ||
cab50449 | 4654 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
4655 | parse_GOTO_TABLE(char *arg, struct ofpbuf *ofpacts, |
4656 | enum ofputil_protocol *usable_protocols OVS_UNUSED) | |
4657 | { | |
4658 | struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts); | |
4659 | char *table_s = strsep(&arg, ","); | |
4660 | if (!table_s || !table_s[0]) { | |
4661 | return xstrdup("instruction goto-table needs table id"); | |
4662 | } | |
4663 | return str_to_u8(table_s, "table", &ogt->table_id); | |
4664 | } | |
4665 | ||
4666 | static void | |
4667 | format_GOTO_TABLE(const struct ofpact_goto_table *a, struct ds *s) | |
4668 | { | |
4669 | ds_put_format(s, "goto_table:%"PRIu8, a->table_id); | |
4670 | } | |
4671 | \f | |
4672 | static void | |
5ad4b3f8 | 4673 | log_bad_action(const struct ofp_action_header *actions, size_t actions_len, |
c2d936a4 BP |
4674 | const struct ofp_action_header *bad_action, enum ofperr error) |
4675 | { | |
4676 | if (!VLOG_DROP_WARN(&rl)) { | |
4677 | struct ds s; | |
4678 | ||
4679 | ds_init(&s); | |
5ad4b3f8 | 4680 | ds_put_hex_dump(&s, actions, actions_len, 0, false); |
c2d936a4 BP |
4681 | VLOG_WARN("bad action at offset %#"PRIxPTR" (%s):\n%s", |
4682 | (char *)bad_action - (char *)actions, | |
4683 | ofperr_get_name(error), ds_cstr(&s)); | |
4684 | ds_destroy(&s); | |
4685 | } | |
4686 | } | |
4687 | ||
4688 | static enum ofperr | |
4689 | ofpacts_decode(const void *actions, size_t actions_len, | |
4690 | enum ofp_version ofp_version, struct ofpbuf *ofpacts) | |
4691 | { | |
4692 | struct ofpbuf openflow; | |
4693 | ||
4694 | ofpbuf_use_const(&openflow, actions, actions_len); | |
6fd6ed71 PS |
4695 | while (openflow.size) { |
4696 | const struct ofp_action_header *action = openflow.data; | |
c2d936a4 BP |
4697 | enum ofp_raw_action_type raw; |
4698 | enum ofperr error; | |
4699 | uint64_t arg; | |
4700 | ||
4701 | error = ofpact_pull_raw(&openflow, ofp_version, &raw, &arg); | |
4702 | if (!error) { | |
4703 | error = ofpact_decode(action, raw, arg, ofpacts); | |
4704 | } | |
4705 | ||
4706 | if (error) { | |
5ad4b3f8 | 4707 | log_bad_action(actions, actions_len, action, error); |
c2d936a4 BP |
4708 | return error; |
4709 | } | |
4710 | } | |
4711 | ||
4712 | ofpact_pad(ofpacts); | |
4713 | return 0; | |
4714 | } | |
4715 | ||
4716 | static enum ofperr | |
4717 | ofpacts_pull_openflow_actions__(struct ofpbuf *openflow, | |
4718 | unsigned int actions_len, | |
4719 | enum ofp_version version, | |
4720 | uint32_t allowed_ovsinsts, | |
4721 | struct ofpbuf *ofpacts) | |
4722 | { | |
4723 | const struct ofp_action_header *actions; | |
4724 | enum ofperr error; | |
4725 | ||
4726 | ofpbuf_clear(ofpacts); | |
4727 | ||
4728 | if (actions_len % OFP_ACTION_ALIGN != 0) { | |
4729 | VLOG_WARN_RL(&rl, "OpenFlow message actions length %u is not a " | |
4730 | "multiple of %d", actions_len, OFP_ACTION_ALIGN); | |
4731 | return OFPERR_OFPBRC_BAD_LEN; | |
4732 | } | |
4733 | ||
4734 | actions = ofpbuf_try_pull(openflow, actions_len); | |
4735 | if (actions == NULL) { | |
4736 | VLOG_WARN_RL(&rl, "OpenFlow message actions length %u exceeds " | |
4737 | "remaining message length (%"PRIu32")", | |
6fd6ed71 | 4738 | actions_len, openflow->size); |
c2d936a4 BP |
4739 | return OFPERR_OFPBRC_BAD_LEN; |
4740 | } | |
4741 | ||
4742 | error = ofpacts_decode(actions, actions_len, version, ofpacts); | |
4743 | if (error) { | |
4744 | ofpbuf_clear(ofpacts); | |
4745 | return error; | |
4746 | } | |
4747 | ||
6fd6ed71 | 4748 | error = ofpacts_verify(ofpacts->data, ofpacts->size, |
c2d936a4 BP |
4749 | allowed_ovsinsts); |
4750 | if (error) { | |
4751 | ofpbuf_clear(ofpacts); | |
4752 | } | |
4753 | return error; | |
4754 | } | |
4755 | ||
4756 | /* Attempts to convert 'actions_len' bytes of OpenFlow actions from the | |
4757 | * front of 'openflow' into ofpacts. On success, replaces any existing content | |
4758 | * in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'. | |
4759 | * Returns 0 if successful, otherwise an OpenFlow error. | |
4760 | * | |
4761 | * Actions are processed according to their OpenFlow version which | |
4762 | * is provided in the 'version' parameter. | |
4763 | * | |
4764 | * In most places in OpenFlow, actions appear encapsulated in instructions, so | |
4765 | * you should call ofpacts_pull_openflow_instructions() instead of this | |
4766 | * function. | |
4767 | * | |
4768 | * The parsed actions are valid generically, but they may not be valid in a | |
4769 | * specific context. For example, port numbers up to OFPP_MAX are valid | |
4770 | * generically, but specific datapaths may only support port numbers in a | |
4771 | * smaller range. Use ofpacts_check() to additional check whether actions are | |
4772 | * valid in a specific context. */ | |
4773 | enum ofperr | |
4774 | ofpacts_pull_openflow_actions(struct ofpbuf *openflow, | |
4775 | unsigned int actions_len, | |
4776 | enum ofp_version version, | |
4777 | struct ofpbuf *ofpacts) | |
4778 | { | |
4779 | return ofpacts_pull_openflow_actions__(openflow, actions_len, version, | |
4780 | 1u << OVSINST_OFPIT11_APPLY_ACTIONS, | |
4781 | ofpacts); | |
4782 | } | |
4783 | \f | |
4784 | /* OpenFlow 1.1 actions. */ | |
4785 | ||
4786 | ||
4787 | /* True if an action sets the value of a field | |
4788 | * in a way that is compatibile with the action set. | |
1b0ee636 | 4789 | * The field can be set via either a set or a move action. |
c2d936a4 BP |
4790 | * False otherwise. */ |
4791 | static bool | |
1b0ee636 | 4792 | ofpact_is_set_or_move_action(const struct ofpact *a) |
c2d936a4 BP |
4793 | { |
4794 | switch (a->type) { | |
4795 | case OFPACT_SET_FIELD: | |
1b0ee636 | 4796 | case OFPACT_REG_MOVE: |
c2d936a4 BP |
4797 | case OFPACT_SET_ETH_DST: |
4798 | case OFPACT_SET_ETH_SRC: | |
4799 | case OFPACT_SET_IP_DSCP: | |
4800 | case OFPACT_SET_IP_ECN: | |
4801 | case OFPACT_SET_IP_TTL: | |
4802 | case OFPACT_SET_IPV4_DST: | |
4803 | case OFPACT_SET_IPV4_SRC: | |
4804 | case OFPACT_SET_L4_DST_PORT: | |
4805 | case OFPACT_SET_L4_SRC_PORT: | |
4806 | case OFPACT_SET_MPLS_LABEL: | |
4807 | case OFPACT_SET_MPLS_TC: | |
4808 | case OFPACT_SET_MPLS_TTL: | |
4809 | case OFPACT_SET_QUEUE: | |
4810 | case OFPACT_SET_TUNNEL: | |
4811 | case OFPACT_SET_VLAN_PCP: | |
4812 | case OFPACT_SET_VLAN_VID: | |
4813 | return true; | |
4814 | case OFPACT_BUNDLE: | |
4815 | case OFPACT_CLEAR_ACTIONS: | |
4816 | case OFPACT_CONTROLLER: | |
4817 | case OFPACT_DEC_MPLS_TTL: | |
4818 | case OFPACT_DEC_TTL: | |
4819 | case OFPACT_ENQUEUE: | |
4820 | case OFPACT_EXIT: | |
e672ff9b | 4821 | case OFPACT_UNROLL_XLATE: |
c2d936a4 BP |
4822 | case OFPACT_FIN_TIMEOUT: |
4823 | case OFPACT_GOTO_TABLE: | |
4824 | case OFPACT_GROUP: | |
4825 | case OFPACT_LEARN: | |
18080541 | 4826 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
4827 | case OFPACT_METER: |
4828 | case OFPACT_MULTIPATH: | |
4829 | case OFPACT_NOTE: | |
4830 | case OFPACT_OUTPUT: | |
4831 | case OFPACT_OUTPUT_REG: | |
4832 | case OFPACT_POP_MPLS: | |
4833 | case OFPACT_POP_QUEUE: | |
4834 | case OFPACT_PUSH_MPLS: | |
4835 | case OFPACT_PUSH_VLAN: | |
c2d936a4 BP |
4836 | case OFPACT_RESUBMIT: |
4837 | case OFPACT_SAMPLE: | |
4838 | case OFPACT_STACK_POP: | |
4839 | case OFPACT_STACK_PUSH: | |
4840 | case OFPACT_STRIP_VLAN: | |
4841 | case OFPACT_WRITE_ACTIONS: | |
4842 | case OFPACT_WRITE_METADATA: | |
d4abaff5 | 4843 | case OFPACT_DEBUG_RECIRC: |
c2d936a4 BP |
4844 | return false; |
4845 | default: | |
4846 | OVS_NOT_REACHED(); | |
4847 | } | |
4848 | } | |
4849 | ||
4850 | /* True if an action is allowed in the action set. | |
4851 | * False otherwise. */ | |
4852 | static bool | |
4853 | ofpact_is_allowed_in_actions_set(const struct ofpact *a) | |
4854 | { | |
4855 | switch (a->type) { | |
4856 | case OFPACT_DEC_MPLS_TTL: | |
4857 | case OFPACT_DEC_TTL: | |
4858 | case OFPACT_GROUP: | |
4859 | case OFPACT_OUTPUT: | |
4860 | case OFPACT_POP_MPLS: | |
4861 | case OFPACT_PUSH_MPLS: | |
4862 | case OFPACT_PUSH_VLAN: | |
1b0ee636 | 4863 | case OFPACT_REG_MOVE: |
c2d936a4 BP |
4864 | case OFPACT_SET_FIELD: |
4865 | case OFPACT_SET_ETH_DST: | |
4866 | case OFPACT_SET_ETH_SRC: | |
4867 | case OFPACT_SET_IP_DSCP: | |
4868 | case OFPACT_SET_IP_ECN: | |
4869 | case OFPACT_SET_IP_TTL: | |
4870 | case OFPACT_SET_IPV4_DST: | |
4871 | case OFPACT_SET_IPV4_SRC: | |
4872 | case OFPACT_SET_L4_DST_PORT: | |
4873 | case OFPACT_SET_L4_SRC_PORT: | |
4874 | case OFPACT_SET_MPLS_LABEL: | |
4875 | case OFPACT_SET_MPLS_TC: | |
4876 | case OFPACT_SET_MPLS_TTL: | |
4877 | case OFPACT_SET_QUEUE: | |
4878 | case OFPACT_SET_TUNNEL: | |
4879 | case OFPACT_SET_VLAN_PCP: | |
4880 | case OFPACT_SET_VLAN_VID: | |
4881 | case OFPACT_STRIP_VLAN: | |
4882 | return true; | |
4883 | ||
4884 | /* In general these actions are excluded because they are not part of | |
4885 | * the OpenFlow specification nor map to actions that are defined in | |
4886 | * the specification. Thus the order in which they should be applied | |
4887 | * in the action set is undefined. */ | |
4888 | case OFPACT_BUNDLE: | |
4889 | case OFPACT_CONTROLLER: | |
4890 | case OFPACT_ENQUEUE: | |
4891 | case OFPACT_EXIT: | |
e672ff9b | 4892 | case OFPACT_UNROLL_XLATE: |
c2d936a4 BP |
4893 | case OFPACT_FIN_TIMEOUT: |
4894 | case OFPACT_LEARN: | |
18080541 | 4895 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
4896 | case OFPACT_MULTIPATH: |
4897 | case OFPACT_NOTE: | |
4898 | case OFPACT_OUTPUT_REG: | |
4899 | case OFPACT_POP_QUEUE: | |
c2d936a4 BP |
4900 | case OFPACT_RESUBMIT: |
4901 | case OFPACT_SAMPLE: | |
4902 | case OFPACT_STACK_POP: | |
4903 | case OFPACT_STACK_PUSH: | |
d4abaff5 | 4904 | case OFPACT_DEBUG_RECIRC: |
c2d936a4 BP |
4905 | |
4906 | /* The action set may only include actions and thus | |
4907 | * may not include any instructions */ | |
4908 | case OFPACT_CLEAR_ACTIONS: | |
4909 | case OFPACT_GOTO_TABLE: | |
4910 | case OFPACT_METER: | |
4911 | case OFPACT_WRITE_ACTIONS: | |
4912 | case OFPACT_WRITE_METADATA: | |
4913 | return false; | |
4914 | default: | |
4915 | OVS_NOT_REACHED(); | |
4916 | } | |
f25d0cf3 BP |
4917 | } |
4918 | ||
c2d936a4 | 4919 | /* Append ofpact 'a' onto the tail of 'out' */ |
f25d0cf3 | 4920 | static void |
c2d936a4 | 4921 | ofpact_copy(struct ofpbuf *out, const struct ofpact *a) |
f25d0cf3 | 4922 | { |
c2d936a4 | 4923 | ofpbuf_put(out, a, OFPACT_ALIGN(a->len)); |
f25d0cf3 BP |
4924 | } |
4925 | ||
c2d936a4 BP |
4926 | /* Copies the last ofpact whose type is 'filter' from 'in' to 'out'. */ |
4927 | static bool | |
4928 | ofpacts_copy_last(struct ofpbuf *out, const struct ofpbuf *in, | |
4929 | enum ofpact_type filter) | |
f25d0cf3 | 4930 | { |
c2d936a4 BP |
4931 | const struct ofpact *target; |
4932 | const struct ofpact *a; | |
f25d0cf3 | 4933 | |
c2d936a4 | 4934 | target = NULL; |
6fd6ed71 | 4935 | OFPACT_FOR_EACH (a, in->data, in->size) { |
c2d936a4 BP |
4936 | if (a->type == filter) { |
4937 | target = a; | |
4938 | } | |
4939 | } | |
4940 | if (target) { | |
4941 | ofpact_copy(out, target); | |
f25d0cf3 | 4942 | } |
c2d936a4 | 4943 | return target != NULL; |
f25d0cf3 BP |
4944 | } |
4945 | ||
c2d936a4 BP |
4946 | /* Append all ofpacts, for which 'filter' returns true, from 'in' to 'out'. |
4947 | * The order of appended ofpacts is preserved between 'in' and 'out' */ | |
4cceacb9 | 4948 | static void |
c2d936a4 BP |
4949 | ofpacts_copy_all(struct ofpbuf *out, const struct ofpbuf *in, |
4950 | bool (*filter)(const struct ofpact *)) | |
4cceacb9 | 4951 | { |
c2d936a4 | 4952 | const struct ofpact *a; |
4cceacb9 | 4953 | |
6fd6ed71 | 4954 | OFPACT_FOR_EACH (a, in->data, in->size) { |
c2d936a4 BP |
4955 | if (filter(a)) { |
4956 | ofpact_copy(out, a); | |
4957 | } | |
4958 | } | |
4cceacb9 JS |
4959 | } |
4960 | ||
c2d936a4 BP |
4961 | /* Reads 'action_set', which contains ofpacts accumulated by |
4962 | * OFPACT_WRITE_ACTIONS instructions, and writes equivalent actions to be | |
4963 | * executed directly into 'action_list'. (These names correspond to the | |
4964 | * "Action Set" and "Action List" terms used in OpenFlow 1.1+.) | |
4965 | * | |
4966 | * In general this involves appending the last instance of each action that is | |
e672ff9b | 4967 | * admissible in the action set in the order described in the OpenFlow |
c2d936a4 BP |
4968 | * specification. |
4969 | * | |
4970 | * Exceptions: | |
4971 | * + output action is only appended if no group action was present in 'in'. | |
4972 | * + As a simplification all set actions are copied in the order the are | |
4973 | * provided in 'in' as many set actions applied to a field has the same | |
4974 | * affect as only applying the last action that sets a field and | |
4975 | * duplicates are removed by do_xlate_actions(). | |
4976 | * This has an unwanted side-effect of compsoting multiple | |
4977 | * LOAD_REG actions that touch different regions of the same field. */ | |
4978 | void | |
4979 | ofpacts_execute_action_set(struct ofpbuf *action_list, | |
4980 | const struct ofpbuf *action_set) | |
f25d0cf3 | 4981 | { |
c2d936a4 BP |
4982 | /* The OpenFlow spec "Action Set" section specifies this order. */ |
4983 | ofpacts_copy_last(action_list, action_set, OFPACT_STRIP_VLAN); | |
4984 | ofpacts_copy_last(action_list, action_set, OFPACT_POP_MPLS); | |
4985 | ofpacts_copy_last(action_list, action_set, OFPACT_PUSH_MPLS); | |
4986 | ofpacts_copy_last(action_list, action_set, OFPACT_PUSH_VLAN); | |
4987 | ofpacts_copy_last(action_list, action_set, OFPACT_DEC_TTL); | |
4988 | ofpacts_copy_last(action_list, action_set, OFPACT_DEC_MPLS_TTL); | |
1b0ee636 | 4989 | ofpacts_copy_all(action_list, action_set, ofpact_is_set_or_move_action); |
c2d936a4 | 4990 | ofpacts_copy_last(action_list, action_set, OFPACT_SET_QUEUE); |
f25d0cf3 | 4991 | |
c2d936a4 BP |
4992 | /* If both OFPACT_GROUP and OFPACT_OUTPUT are present, OpenFlow says that |
4993 | * we should execute only OFPACT_GROUP. | |
4994 | * | |
4995 | * If neither OFPACT_GROUP nor OFPACT_OUTPUT is present, then we can drop | |
4996 | * all the actions because there's no point in modifying a packet that will | |
4997 | * not be sent anywhere. */ | |
4998 | if (!ofpacts_copy_last(action_list, action_set, OFPACT_GROUP) && | |
2e34a6a3 SS |
4999 | !ofpacts_copy_last(action_list, action_set, OFPACT_OUTPUT) && |
5000 | !ofpacts_copy_last(action_list, action_set, OFPACT_RESUBMIT)) { | |
c2d936a4 | 5001 | ofpbuf_clear(action_list); |
f25d0cf3 | 5002 | } |
f25d0cf3 BP |
5003 | } |
5004 | ||
f25d0cf3 | 5005 | |
c2d936a4 BP |
5006 | static enum ofperr |
5007 | ofpacts_decode_for_action_set(const struct ofp_action_header *in, | |
5008 | size_t n_in, enum ofp_version version, | |
5009 | struct ofpbuf *out) | |
c2d967a5 | 5010 | { |
c2d936a4 BP |
5011 | enum ofperr error; |
5012 | struct ofpact *a; | |
6fd6ed71 | 5013 | size_t start = out->size; |
c2d967a5 | 5014 | |
c2d936a4 | 5015 | error = ofpacts_decode(in, n_in, version, out); |
c2d967a5 | 5016 | |
c2d936a4 BP |
5017 | if (error) { |
5018 | return error; | |
5019 | } | |
5020 | ||
6fd6ed71 | 5021 | OFPACT_FOR_EACH (a, ofpact_end(out->data, start), out->size - start) { |
c2d936a4 BP |
5022 | if (!ofpact_is_allowed_in_actions_set(a)) { |
5023 | VLOG_WARN_RL(&rl, "disallowed action in action set"); | |
5024 | return OFPERR_OFPBAC_BAD_TYPE; | |
c2d967a5 MM |
5025 | } |
5026 | } | |
c2d936a4 BP |
5027 | |
5028 | return 0; | |
c2d967a5 | 5029 | } |
c2d936a4 BP |
5030 | \f |
5031 | /* OpenFlow 1.1 instructions. */ | |
c2d967a5 | 5032 | |
c2d936a4 BP |
5033 | struct instruction_type_info { |
5034 | enum ovs_instruction_type type; | |
5035 | const char *name; | |
5036 | }; | |
5037 | ||
5038 | static const struct instruction_type_info inst_info[] = { | |
5039 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) {OVSINST_##ENUM, NAME}, | |
5040 | OVS_INSTRUCTIONS | |
5041 | #undef DEFINE_INST | |
5042 | }; | |
5043 | ||
5044 | const char * | |
5045 | ovs_instruction_name_from_type(enum ovs_instruction_type type) | |
f25d0cf3 | 5046 | { |
c2d936a4 | 5047 | return inst_info[type].name; |
f25d0cf3 BP |
5048 | } |
5049 | ||
c2d936a4 BP |
5050 | int |
5051 | ovs_instruction_type_from_name(const char *name) | |
29089a54 | 5052 | { |
c2d936a4 BP |
5053 | const struct instruction_type_info *p; |
5054 | for (p = inst_info; p < &inst_info[ARRAY_SIZE(inst_info)]; p++) { | |
5055 | if (!strcasecmp(name, p->name)) { | |
5056 | return p->type; | |
5057 | } | |
5058 | } | |
5059 | return -1; | |
29089a54 RL |
5060 | } |
5061 | ||
c2d936a4 BP |
5062 | enum ovs_instruction_type |
5063 | ovs_instruction_type_from_ofpact_type(enum ofpact_type type) | |
f25d0cf3 | 5064 | { |
c2d936a4 BP |
5065 | switch (type) { |
5066 | case OFPACT_METER: | |
5067 | return OVSINST_OFPIT13_METER; | |
5068 | case OFPACT_CLEAR_ACTIONS: | |
5069 | return OVSINST_OFPIT11_CLEAR_ACTIONS; | |
5070 | case OFPACT_WRITE_ACTIONS: | |
5071 | return OVSINST_OFPIT11_WRITE_ACTIONS; | |
5072 | case OFPACT_WRITE_METADATA: | |
5073 | return OVSINST_OFPIT11_WRITE_METADATA; | |
5074 | case OFPACT_GOTO_TABLE: | |
5075 | return OVSINST_OFPIT11_GOTO_TABLE; | |
5076 | case OFPACT_OUTPUT: | |
5077 | case OFPACT_GROUP: | |
f25d0cf3 | 5078 | case OFPACT_CONTROLLER: |
c2d936a4 | 5079 | case OFPACT_ENQUEUE: |
f25d0cf3 | 5080 | case OFPACT_OUTPUT_REG: |
f25d0cf3 | 5081 | case OFPACT_BUNDLE: |
c2d936a4 BP |
5082 | case OFPACT_SET_VLAN_VID: |
5083 | case OFPACT_SET_VLAN_PCP: | |
5084 | case OFPACT_STRIP_VLAN: | |
5085 | case OFPACT_PUSH_VLAN: | |
5086 | case OFPACT_SET_ETH_SRC: | |
5087 | case OFPACT_SET_ETH_DST: | |
5088 | case OFPACT_SET_IPV4_SRC: | |
5089 | case OFPACT_SET_IPV4_DST: | |
5090 | case OFPACT_SET_IP_DSCP: | |
5091 | case OFPACT_SET_IP_ECN: | |
5092 | case OFPACT_SET_IP_TTL: | |
5093 | case OFPACT_SET_L4_SRC_PORT: | |
5094 | case OFPACT_SET_L4_DST_PORT: | |
f25d0cf3 | 5095 | case OFPACT_REG_MOVE: |
c2d936a4 | 5096 | case OFPACT_SET_FIELD: |
bd85dac1 | 5097 | case OFPACT_STACK_PUSH: |
bd85dac1 | 5098 | case OFPACT_STACK_POP: |
f25d0cf3 | 5099 | case OFPACT_DEC_TTL: |
097d4939 | 5100 | case OFPACT_SET_MPLS_LABEL: |
097d4939 | 5101 | case OFPACT_SET_MPLS_TC: |
0f3f3c3d | 5102 | case OFPACT_SET_MPLS_TTL: |
b676167a | 5103 | case OFPACT_DEC_MPLS_TTL: |
c2d936a4 BP |
5104 | case OFPACT_PUSH_MPLS: |
5105 | case OFPACT_POP_MPLS: | |
f25d0cf3 | 5106 | case OFPACT_SET_TUNNEL: |
c2d936a4 BP |
5107 | case OFPACT_SET_QUEUE: |
5108 | case OFPACT_POP_QUEUE: | |
5109 | case OFPACT_FIN_TIMEOUT: | |
5110 | case OFPACT_RESUBMIT: | |
5111 | case OFPACT_LEARN: | |
18080541 | 5112 | case OFPACT_CONJUNCTION: |
c2d936a4 BP |
5113 | case OFPACT_MULTIPATH: |
5114 | case OFPACT_NOTE: | |
5115 | case OFPACT_EXIT: | |
e672ff9b | 5116 | case OFPACT_UNROLL_XLATE: |
c2d936a4 | 5117 | case OFPACT_SAMPLE: |
d4abaff5 | 5118 | case OFPACT_DEBUG_RECIRC: |
c2d936a4 BP |
5119 | default: |
5120 | return OVSINST_OFPIT11_APPLY_ACTIONS; | |
5121 | } | |
5122 | } | |
5123 | ||
5124 | enum ofperr | |
5125 | ovs_instruction_type_from_inst_type(enum ovs_instruction_type *instruction_type, | |
5126 | const uint16_t inst_type) | |
5127 | { | |
5128 | switch (inst_type) { | |
5129 | ||
5130 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
5131 | case ENUM: \ | |
5132 | *instruction_type = OVSINST_##ENUM; \ | |
5133 | return 0; | |
5134 | OVS_INSTRUCTIONS | |
5135 | #undef DEFINE_INST | |
5136 | ||
5137 | default: | |
5138 | return OFPERR_OFPBIC_UNKNOWN_INST; | |
5139 | } | |
5140 | } | |
5141 | ||
5142 | /* Two-way translation between OVS's internal "OVSINST_*" representation of | |
5143 | * instructions and the "OFPIT_*" representation used in OpenFlow. */ | |
5144 | struct ovsinst_map { | |
5145 | enum ovs_instruction_type ovsinst; /* Internal name for instruction. */ | |
5146 | int ofpit; /* OFPIT_* number from OpenFlow spec. */ | |
5147 | }; | |
5148 | ||
5149 | static const struct ovsinst_map * | |
5150 | get_ovsinst_map(enum ofp_version version) | |
5151 | { | |
5152 | /* OpenFlow 1.1 and 1.2 instructions. */ | |
5153 | static const struct ovsinst_map of11[] = { | |
5154 | { OVSINST_OFPIT11_GOTO_TABLE, 1 }, | |
5155 | { OVSINST_OFPIT11_WRITE_METADATA, 2 }, | |
5156 | { OVSINST_OFPIT11_WRITE_ACTIONS, 3 }, | |
5157 | { OVSINST_OFPIT11_APPLY_ACTIONS, 4 }, | |
5158 | { OVSINST_OFPIT11_CLEAR_ACTIONS, 5 }, | |
5159 | { 0, -1 }, | |
5160 | }; | |
f25d0cf3 | 5161 | |
c2d936a4 BP |
5162 | /* OpenFlow 1.3+ instructions. */ |
5163 | static const struct ovsinst_map of13[] = { | |
5164 | { OVSINST_OFPIT11_GOTO_TABLE, 1 }, | |
5165 | { OVSINST_OFPIT11_WRITE_METADATA, 2 }, | |
5166 | { OVSINST_OFPIT11_WRITE_ACTIONS, 3 }, | |
5167 | { OVSINST_OFPIT11_APPLY_ACTIONS, 4 }, | |
5168 | { OVSINST_OFPIT11_CLEAR_ACTIONS, 5 }, | |
5169 | { OVSINST_OFPIT13_METER, 6 }, | |
5170 | { 0, -1 }, | |
5171 | }; | |
4cceacb9 | 5172 | |
c2d936a4 BP |
5173 | return version < OFP13_VERSION ? of11 : of13; |
5174 | } | |
f25d0cf3 | 5175 | |
c2d936a4 BP |
5176 | /* Converts 'ovsinst_bitmap', a bitmap whose bits correspond to OVSINST_* |
5177 | * values, into a bitmap of instructions suitable for OpenFlow 'version' | |
5178 | * (OFP11_VERSION or later), and returns the result. */ | |
5179 | ovs_be32 | |
5180 | ovsinst_bitmap_to_openflow(uint32_t ovsinst_bitmap, enum ofp_version version) | |
5181 | { | |
5182 | uint32_t ofpit_bitmap = 0; | |
5183 | const struct ovsinst_map *x; | |
f25d0cf3 | 5184 | |
c2d936a4 BP |
5185 | for (x = get_ovsinst_map(version); x->ofpit >= 0; x++) { |
5186 | if (ovsinst_bitmap & (1u << x->ovsinst)) { | |
5187 | ofpit_bitmap |= 1u << x->ofpit; | |
5188 | } | |
5189 | } | |
5190 | return htonl(ofpit_bitmap); | |
5191 | } | |
f25d0cf3 | 5192 | |
c2d936a4 BP |
5193 | /* Converts 'ofpit_bitmap', a bitmap of instructions from an OpenFlow message |
5194 | * with the given 'version' (OFP11_VERSION or later) into a bitmap whose bits | |
5195 | * correspond to OVSINST_* values, and returns the result. */ | |
5196 | uint32_t | |
5197 | ovsinst_bitmap_from_openflow(ovs_be32 ofpit_bitmap, enum ofp_version version) | |
5198 | { | |
5199 | uint32_t ovsinst_bitmap = 0; | |
5200 | const struct ovsinst_map *x; | |
f25d0cf3 | 5201 | |
c2d936a4 BP |
5202 | for (x = get_ovsinst_map(version); x->ofpit >= 0; x++) { |
5203 | if (ofpit_bitmap & htonl(1u << x->ofpit)) { | |
5204 | ovsinst_bitmap |= 1u << x->ovsinst; | |
5205 | } | |
5206 | } | |
5207 | return ovsinst_bitmap; | |
5208 | } | |
f25d0cf3 | 5209 | |
c2d936a4 BP |
5210 | static inline struct ofp11_instruction * |
5211 | instruction_next(const struct ofp11_instruction *inst) | |
5212 | { | |
5213 | return ((struct ofp11_instruction *) (void *) | |
5214 | ((uint8_t *) inst + ntohs(inst->len))); | |
5215 | } | |
f25d0cf3 | 5216 | |
c2d936a4 BP |
5217 | static inline bool |
5218 | instruction_is_valid(const struct ofp11_instruction *inst, | |
5219 | size_t n_instructions) | |
5220 | { | |
5221 | uint16_t len = ntohs(inst->len); | |
5222 | return (!(len % OFP11_INSTRUCTION_ALIGN) | |
5223 | && len >= sizeof *inst | |
5224 | && len / sizeof *inst <= n_instructions); | |
5225 | } | |
f25d0cf3 | 5226 | |
c2d936a4 BP |
5227 | /* This macro is careful to check for instructions with bad lengths. */ |
5228 | #define INSTRUCTION_FOR_EACH(ITER, LEFT, INSTRUCTIONS, N_INSTRUCTIONS) \ | |
5229 | for ((ITER) = (INSTRUCTIONS), (LEFT) = (N_INSTRUCTIONS); \ | |
5230 | (LEFT) > 0 && instruction_is_valid(ITER, LEFT); \ | |
5231 | ((LEFT) -= (ntohs((ITER)->len) \ | |
5232 | / sizeof(struct ofp11_instruction)), \ | |
5233 | (ITER) = instruction_next(ITER))) | |
f25d0cf3 | 5234 | |
c2d936a4 BP |
5235 | static enum ofperr |
5236 | decode_openflow11_instruction(const struct ofp11_instruction *inst, | |
5237 | enum ovs_instruction_type *type) | |
5238 | { | |
5239 | uint16_t len = ntohs(inst->len); | |
b02475c5 | 5240 | |
c2d936a4 BP |
5241 | switch (inst->type) { |
5242 | case CONSTANT_HTONS(OFPIT11_EXPERIMENTER): | |
5243 | return OFPERR_OFPBIC_BAD_EXPERIMENTER; | |
b02475c5 | 5244 | |
c2d936a4 BP |
5245 | #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \ |
5246 | case CONSTANT_HTONS(ENUM): \ | |
5247 | if (EXTENSIBLE \ | |
5248 | ? len >= sizeof(struct STRUCT) \ | |
5249 | : len == sizeof(struct STRUCT)) { \ | |
5250 | *type = OVSINST_##ENUM; \ | |
5251 | return 0; \ | |
5252 | } else { \ | |
5253 | return OFPERR_OFPBIC_BAD_LEN; \ | |
5254 | } | |
5255 | OVS_INSTRUCTIONS | |
5256 | #undef DEFINE_INST | |
29089a54 | 5257 | |
c2d936a4 BP |
5258 | default: |
5259 | return OFPERR_OFPBIC_UNKNOWN_INST; | |
f25d0cf3 BP |
5260 | } |
5261 | } | |
f25d0cf3 | 5262 | |
c2d936a4 BP |
5263 | static enum ofperr |
5264 | decode_openflow11_instructions(const struct ofp11_instruction insts[], | |
5265 | size_t n_insts, | |
5266 | const struct ofp11_instruction *out[]) | |
f25d0cf3 | 5267 | { |
c2d936a4 BP |
5268 | const struct ofp11_instruction *inst; |
5269 | size_t left; | |
f25d0cf3 | 5270 | |
c2d936a4 BP |
5271 | memset(out, 0, N_OVS_INSTRUCTIONS * sizeof *out); |
5272 | INSTRUCTION_FOR_EACH (inst, left, insts, n_insts) { | |
5273 | enum ovs_instruction_type type; | |
5274 | enum ofperr error; | |
f25d0cf3 | 5275 | |
c2d936a4 BP |
5276 | error = decode_openflow11_instruction(inst, &type); |
5277 | if (error) { | |
5278 | return error; | |
5279 | } | |
f25d0cf3 | 5280 | |
c2d936a4 BP |
5281 | if (out[type]) { |
5282 | return OFPERR_OFPBIC_DUP_INST; | |
5283 | } | |
5284 | out[type] = inst; | |
5285 | } | |
5286 | ||
5287 | if (left) { | |
5288 | VLOG_WARN_RL(&rl, "bad instruction format at offset %"PRIuSIZE, | |
5289 | (n_insts - left) * sizeof *inst); | |
5290 | return OFPERR_OFPBIC_BAD_LEN; | |
5291 | } | |
5292 | return 0; | |
f25d0cf3 BP |
5293 | } |
5294 | ||
5295 | static void | |
c2d936a4 BP |
5296 | get_actions_from_instruction(const struct ofp11_instruction *inst, |
5297 | const struct ofp_action_header **actions, | |
5298 | size_t *actions_len) | |
f25d0cf3 | 5299 | { |
c2d936a4 BP |
5300 | *actions = ALIGNED_CAST(const struct ofp_action_header *, inst + 1); |
5301 | *actions_len = ntohs(inst->len) - sizeof *inst; | |
5302 | } | |
f25d0cf3 | 5303 | |
c2d936a4 BP |
5304 | enum ofperr |
5305 | ofpacts_pull_openflow_instructions(struct ofpbuf *openflow, | |
5306 | unsigned int instructions_len, | |
5307 | enum ofp_version version, | |
5308 | struct ofpbuf *ofpacts) | |
5309 | { | |
5310 | const struct ofp11_instruction *instructions; | |
5311 | const struct ofp11_instruction *insts[N_OVS_INSTRUCTIONS]; | |
5312 | enum ofperr error; | |
f25d0cf3 | 5313 | |
c2d936a4 BP |
5314 | if (version == OFP10_VERSION) { |
5315 | return ofpacts_pull_openflow_actions__(openflow, instructions_len, | |
5316 | version, | |
5317 | (1u << N_OVS_INSTRUCTIONS) - 1, | |
5318 | ofpacts); | |
5319 | } | |
f25d0cf3 | 5320 | |
c2d936a4 | 5321 | ofpbuf_clear(ofpacts); |
f25d0cf3 | 5322 | |
c2d936a4 BP |
5323 | if (instructions_len % OFP11_INSTRUCTION_ALIGN != 0) { |
5324 | VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u is not a " | |
5325 | "multiple of %d", | |
5326 | instructions_len, OFP11_INSTRUCTION_ALIGN); | |
5327 | error = OFPERR_OFPBIC_BAD_LEN; | |
5328 | goto exit; | |
5329 | } | |
f25d0cf3 | 5330 | |
c2d936a4 BP |
5331 | instructions = ofpbuf_try_pull(openflow, instructions_len); |
5332 | if (instructions == NULL) { | |
5333 | VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u exceeds " | |
5334 | "remaining message length (%"PRIu32")", | |
6fd6ed71 | 5335 | instructions_len, openflow->size); |
c2d936a4 BP |
5336 | error = OFPERR_OFPBIC_BAD_LEN; |
5337 | goto exit; | |
5338 | } | |
f25d0cf3 | 5339 | |
c2d936a4 BP |
5340 | error = decode_openflow11_instructions( |
5341 | instructions, instructions_len / OFP11_INSTRUCTION_ALIGN, | |
5342 | insts); | |
5343 | if (error) { | |
5344 | goto exit; | |
5345 | } | |
f25d0cf3 | 5346 | |
c2d936a4 BP |
5347 | if (insts[OVSINST_OFPIT13_METER]) { |
5348 | const struct ofp13_instruction_meter *oim; | |
5349 | struct ofpact_meter *om; | |
f25d0cf3 | 5350 | |
c2d936a4 BP |
5351 | oim = ALIGNED_CAST(const struct ofp13_instruction_meter *, |
5352 | insts[OVSINST_OFPIT13_METER]); | |
f25d0cf3 | 5353 | |
c2d936a4 BP |
5354 | om = ofpact_put_METER(ofpacts); |
5355 | om->meter_id = ntohl(oim->meter_id); | |
5356 | } | |
5357 | if (insts[OVSINST_OFPIT11_APPLY_ACTIONS]) { | |
5358 | const struct ofp_action_header *actions; | |
5359 | size_t actions_len; | |
f25d0cf3 | 5360 | |
c2d936a4 BP |
5361 | get_actions_from_instruction(insts[OVSINST_OFPIT11_APPLY_ACTIONS], |
5362 | &actions, &actions_len); | |
5363 | error = ofpacts_decode(actions, actions_len, version, ofpacts); | |
5364 | if (error) { | |
5365 | goto exit; | |
5366 | } | |
5367 | } | |
5368 | if (insts[OVSINST_OFPIT11_CLEAR_ACTIONS]) { | |
5369 | instruction_get_OFPIT11_CLEAR_ACTIONS( | |
5370 | insts[OVSINST_OFPIT11_CLEAR_ACTIONS]); | |
5371 | ofpact_put_CLEAR_ACTIONS(ofpacts); | |
5372 | } | |
5373 | if (insts[OVSINST_OFPIT11_WRITE_ACTIONS]) { | |
5374 | struct ofpact_nest *on; | |
5375 | const struct ofp_action_header *actions; | |
5376 | size_t actions_len; | |
5377 | size_t start; | |
f25d0cf3 | 5378 | |
c2d936a4 | 5379 | ofpact_pad(ofpacts); |
6fd6ed71 | 5380 | start = ofpacts->size; |
255a54ea BP |
5381 | ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS, |
5382 | offsetof(struct ofpact_nest, actions)); | |
c2d936a4 BP |
5383 | get_actions_from_instruction(insts[OVSINST_OFPIT11_WRITE_ACTIONS], |
5384 | &actions, &actions_len); | |
5385 | error = ofpacts_decode_for_action_set(actions, actions_len, | |
5386 | version, ofpacts); | |
5387 | if (error) { | |
5388 | goto exit; | |
5389 | } | |
5390 | on = ofpbuf_at_assert(ofpacts, start, sizeof *on); | |
6fd6ed71 | 5391 | on->ofpact.len = ofpacts->size - start; |
c2d936a4 BP |
5392 | } |
5393 | if (insts[OVSINST_OFPIT11_WRITE_METADATA]) { | |
5394 | const struct ofp11_instruction_write_metadata *oiwm; | |
5395 | struct ofpact_metadata *om; | |
ca287d20 | 5396 | |
c2d936a4 BP |
5397 | oiwm = ALIGNED_CAST(const struct ofp11_instruction_write_metadata *, |
5398 | insts[OVSINST_OFPIT11_WRITE_METADATA]); | |
8dd54666 | 5399 | |
c2d936a4 BP |
5400 | om = ofpact_put_WRITE_METADATA(ofpacts); |
5401 | om->metadata = oiwm->metadata; | |
5402 | om->mask = oiwm->metadata_mask; | |
5403 | } | |
5404 | if (insts[OVSINST_OFPIT11_GOTO_TABLE]) { | |
5405 | const struct ofp11_instruction_goto_table *oigt; | |
5406 | struct ofpact_goto_table *ogt; | |
7395c052 | 5407 | |
c2d936a4 BP |
5408 | oigt = instruction_get_OFPIT11_GOTO_TABLE( |
5409 | insts[OVSINST_OFPIT11_GOTO_TABLE]); | |
5410 | ogt = ofpact_put_GOTO_TABLE(ofpacts); | |
5411 | ogt->table_id = oigt->table_id; | |
5412 | } | |
e3f8f887 | 5413 | |
6fd6ed71 | 5414 | error = ofpacts_verify(ofpacts->data, ofpacts->size, |
c2d936a4 BP |
5415 | (1u << N_OVS_INSTRUCTIONS) - 1); |
5416 | exit: | |
5417 | if (error) { | |
5418 | ofpbuf_clear(ofpacts); | |
f25d0cf3 | 5419 | } |
c2d936a4 | 5420 | return error; |
f25d0cf3 | 5421 | } |
d01c980f | 5422 | |
c2d936a4 BP |
5423 | /* Update the length of the instruction that begins at offset 'ofs' within |
5424 | * 'openflow' and contains nested actions that extend to the end of 'openflow'. | |
5425 | * If the instruction contains no nested actions, deletes it entirely. */ | |
d01c980f | 5426 | static void |
c2d936a4 | 5427 | ofpacts_update_instruction_actions(struct ofpbuf *openflow, size_t ofs) |
d01c980f | 5428 | { |
c2d936a4 | 5429 | struct ofp11_instruction_actions *oia; |
d01c980f | 5430 | |
c2d936a4 | 5431 | oia = ofpbuf_at_assert(openflow, ofs, sizeof *oia); |
6fd6ed71 PS |
5432 | if (openflow->size > ofs + sizeof *oia) { |
5433 | oia->len = htons(openflow->size - ofs); | |
c2d936a4 | 5434 | } else { |
6fd6ed71 | 5435 | openflow->size = ofs; |
c2d936a4 | 5436 | } |
d01c980f | 5437 | } |
c2d936a4 BP |
5438 | \f |
5439 | /* Checks that 'port' is a valid output port for OFPACT_OUTPUT, given that the | |
5440 | * switch will never have more than 'max_ports' ports. Returns 0 if 'port' is | |
5441 | * valid, otherwise an OpenFlow error code. */ | |
5442 | enum ofperr | |
5443 | ofpact_check_output_port(ofp_port_t port, ofp_port_t max_ports) | |
99086062 | 5444 | { |
c2d936a4 BP |
5445 | switch (port) { |
5446 | case OFPP_IN_PORT: | |
5447 | case OFPP_TABLE: | |
5448 | case OFPP_NORMAL: | |
5449 | case OFPP_FLOOD: | |
5450 | case OFPP_ALL: | |
5451 | case OFPP_CONTROLLER: | |
c2d936a4 BP |
5452 | case OFPP_LOCAL: |
5453 | return 0; | |
5454 | ||
13d2c689 BP |
5455 | case OFPP_NONE: |
5456 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
5457 | ||
c2d936a4 BP |
5458 | default: |
5459 | if (ofp_to_u16(port) < ofp_to_u16(max_ports)) { | |
5460 | return 0; | |
5461 | } | |
5462 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
99086062 BP |
5463 | } |
5464 | } | |
5465 | ||
c2d936a4 BP |
5466 | /* Removes the protocols that require consistency between match and actions |
5467 | * (that's everything but OpenFlow 1.0) from '*usable_protocols'. | |
5468 | * | |
5469 | * (An example of an inconsistency between match and actions is a flow that | |
5470 | * does not match on an MPLS Ethertype but has an action that pops an MPLS | |
5471 | * label.) */ | |
d01c980f | 5472 | static void |
c2d936a4 BP |
5473 | inconsistent_match(enum ofputil_protocol *usable_protocols) |
5474 | { | |
5475 | *usable_protocols &= OFPUTIL_P_OF10_ANY; | |
5476 | } | |
5477 | ||
5478 | /* May modify flow->dl_type, flow->nw_proto and flow->vlan_tci, | |
5479 | * caller must restore them. | |
5480 | * | |
5481 | * Modifies some actions, filling in fields that could not be properly set | |
5482 | * without context. */ | |
5483 | static enum ofperr | |
5484 | ofpact_check__(enum ofputil_protocol *usable_protocols, struct ofpact *a, | |
5485 | struct flow *flow, ofp_port_t max_ports, | |
5486 | uint8_t table_id, uint8_t n_tables) | |
d01c980f | 5487 | { |
c2d936a4 BP |
5488 | const struct ofpact_enqueue *enqueue; |
5489 | const struct mf_field *mf; | |
5490 | ||
d01c980f BP |
5491 | switch (a->type) { |
5492 | case OFPACT_OUTPUT: | |
c2d936a4 BP |
5493 | return ofpact_check_output_port(ofpact_get_OUTPUT(a)->port, |
5494 | max_ports); | |
5495 | ||
5496 | case OFPACT_CONTROLLER: | |
5497 | return 0; | |
d01c980f BP |
5498 | |
5499 | case OFPACT_ENQUEUE: | |
c2d936a4 BP |
5500 | enqueue = ofpact_get_ENQUEUE(a); |
5501 | if (ofp_to_u16(enqueue->port) >= ofp_to_u16(max_ports) | |
5502 | && enqueue->port != OFPP_IN_PORT | |
5503 | && enqueue->port != OFPP_LOCAL) { | |
5504 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
5505 | } | |
5506 | return 0; | |
5507 | ||
5508 | case OFPACT_OUTPUT_REG: | |
5509 | return mf_check_src(&ofpact_get_OUTPUT_REG(a)->src, flow); | |
5510 | ||
5511 | case OFPACT_BUNDLE: | |
5512 | return bundle_check(ofpact_get_BUNDLE(a), max_ports, flow); | |
d01c980f BP |
5513 | |
5514 | case OFPACT_SET_VLAN_VID: | |
c2d936a4 BP |
5515 | /* Remember if we saw a vlan tag in the flow to aid translating to |
5516 | * OpenFlow 1.1+ if need be. */ | |
5517 | ofpact_get_SET_VLAN_VID(a)->flow_has_vlan = | |
5518 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
5519 | if (!(flow->vlan_tci & htons(VLAN_CFI)) && | |
5520 | !ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) { | |
5521 | inconsistent_match(usable_protocols); | |
5522 | } | |
5523 | /* Temporary mark that we have a vlan tag. */ | |
5524 | flow->vlan_tci |= htons(VLAN_CFI); | |
5525 | return 0; | |
d01c980f BP |
5526 | |
5527 | case OFPACT_SET_VLAN_PCP: | |
c2d936a4 BP |
5528 | /* Remember if we saw a vlan tag in the flow to aid translating to |
5529 | * OpenFlow 1.1+ if need be. */ | |
5530 | ofpact_get_SET_VLAN_PCP(a)->flow_has_vlan = | |
5531 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
5532 | if (!(flow->vlan_tci & htons(VLAN_CFI)) && | |
5533 | !ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) { | |
5534 | inconsistent_match(usable_protocols); | |
5535 | } | |
5536 | /* Temporary mark that we have a vlan tag. */ | |
5537 | flow->vlan_tci |= htons(VLAN_CFI); | |
5538 | return 0; | |
d01c980f BP |
5539 | |
5540 | case OFPACT_STRIP_VLAN: | |
c2d936a4 BP |
5541 | if (!(flow->vlan_tci & htons(VLAN_CFI))) { |
5542 | inconsistent_match(usable_protocols); | |
5543 | } | |
5544 | /* Temporary mark that we have no vlan tag. */ | |
5545 | flow->vlan_tci = htons(0); | |
5546 | return 0; | |
d01c980f | 5547 | |
3e34fbdd | 5548 | case OFPACT_PUSH_VLAN: |
c2d936a4 BP |
5549 | if (flow->vlan_tci & htons(VLAN_CFI)) { |
5550 | /* Multiple VLAN headers not supported. */ | |
5551 | return OFPERR_OFPBAC_BAD_TAG; | |
5552 | } | |
5553 | /* Temporary mark that we have a vlan tag. */ | |
5554 | flow->vlan_tci |= htons(VLAN_CFI); | |
5555 | return 0; | |
276c4e7a | 5556 | |
d01c980f | 5557 | case OFPACT_SET_ETH_SRC: |
d01c980f | 5558 | case OFPACT_SET_ETH_DST: |
c2d936a4 | 5559 | return 0; |
d01c980f BP |
5560 | |
5561 | case OFPACT_SET_IPV4_SRC: | |
d01c980f | 5562 | case OFPACT_SET_IPV4_DST: |
c2d936a4 BP |
5563 | if (flow->dl_type != htons(ETH_TYPE_IP)) { |
5564 | inconsistent_match(usable_protocols); | |
5565 | } | |
5566 | return 0; | |
d01c980f | 5567 | |
04f01c24 | 5568 | case OFPACT_SET_IP_DSCP: |
ff14eb7a | 5569 | case OFPACT_SET_IP_ECN: |
0c20dbe4 | 5570 | case OFPACT_SET_IP_TTL: |
7bcb1506 | 5571 | case OFPACT_DEC_TTL: |
c2d936a4 BP |
5572 | if (!is_ip_any(flow)) { |
5573 | inconsistent_match(usable_protocols); | |
5574 | } | |
5575 | return 0; | |
b02475c5 | 5576 | |
c2d936a4 | 5577 | case OFPACT_SET_L4_SRC_PORT: |
c2d936a4 | 5578 | case OFPACT_SET_L4_DST_PORT: |
b8778a0d | 5579 | if (!is_ip_any(flow) || (flow->nw_frag & FLOW_NW_FRAG_LATER) || |
c2d936a4 BP |
5580 | (flow->nw_proto != IPPROTO_TCP && flow->nw_proto != IPPROTO_UDP |
5581 | && flow->nw_proto != IPPROTO_SCTP)) { | |
5582 | inconsistent_match(usable_protocols); | |
5583 | } | |
5584 | /* Note on which transport protocol the port numbers are set. | |
5585 | * This allows this set action to be converted to an OF1.2 set field | |
5586 | * action. */ | |
b8778a0d JR |
5587 | if (a->type == OFPACT_SET_L4_SRC_PORT) { |
5588 | ofpact_get_SET_L4_SRC_PORT(a)->flow_ip_proto = flow->nw_proto; | |
5589 | } else { | |
5590 | ofpact_get_SET_L4_DST_PORT(a)->flow_ip_proto = flow->nw_proto; | |
5591 | } | |
c2d936a4 | 5592 | return 0; |
b02475c5 | 5593 | |
c2d936a4 BP |
5594 | case OFPACT_REG_MOVE: |
5595 | return nxm_reg_move_check(ofpact_get_REG_MOVE(a), flow); | |
8dd54666 | 5596 | |
e3f8f887 | 5597 | case OFPACT_SET_FIELD: |
c2d936a4 BP |
5598 | mf = ofpact_get_SET_FIELD(a)->field; |
5599 | /* Require OXM_OF_VLAN_VID to have an existing VLAN header. */ | |
5600 | if (!mf_are_prereqs_ok(mf, flow) || | |
5601 | (mf->id == MFF_VLAN_VID && !(flow->vlan_tci & htons(VLAN_CFI)))) { | |
5602 | VLOG_WARN_RL(&rl, "set_field %s lacks correct prerequisities", | |
5603 | mf->name); | |
5604 | return OFPERR_OFPBAC_MATCH_INCONSISTENT; | |
5605 | } | |
5606 | /* Remember if we saw a vlan tag in the flow to aid translating to | |
5607 | * OpenFlow 1.1 if need be. */ | |
5608 | ofpact_get_SET_FIELD(a)->flow_has_vlan = | |
5609 | (flow->vlan_tci & htons(VLAN_CFI)) == htons(VLAN_CFI); | |
5610 | if (mf->id == MFF_VLAN_TCI) { | |
5611 | /* The set field may add or remove the vlan tag, | |
5612 | * Mark the status temporarily. */ | |
5613 | flow->vlan_tci = ofpact_get_SET_FIELD(a)->value.be16; | |
5614 | } | |
5615 | return 0; | |
e3f8f887 | 5616 | |
bd85dac1 | 5617 | case OFPACT_STACK_PUSH: |
c2d936a4 BP |
5618 | return nxm_stack_push_check(ofpact_get_STACK_PUSH(a), flow); |
5619 | ||
bd85dac1 | 5620 | case OFPACT_STACK_POP: |
c2d936a4 BP |
5621 | return nxm_stack_pop_check(ofpact_get_STACK_POP(a), flow); |
5622 | ||
5623 | case OFPACT_SET_MPLS_LABEL: | |
5624 | case OFPACT_SET_MPLS_TC: | |
5625 | case OFPACT_SET_MPLS_TTL: | |
5626 | case OFPACT_DEC_MPLS_TTL: | |
5627 | if (!eth_type_mpls(flow->dl_type)) { | |
5628 | inconsistent_match(usable_protocols); | |
5629 | } | |
5630 | return 0; | |
5631 | ||
d01c980f | 5632 | case OFPACT_SET_TUNNEL: |
c2d936a4 | 5633 | case OFPACT_SET_QUEUE: |
d01c980f | 5634 | case OFPACT_POP_QUEUE: |
d01c980f | 5635 | case OFPACT_RESUBMIT: |
c2d936a4 BP |
5636 | return 0; |
5637 | ||
5638 | case OFPACT_FIN_TIMEOUT: | |
5639 | if (flow->nw_proto != IPPROTO_TCP) { | |
5640 | inconsistent_match(usable_protocols); | |
5641 | } | |
5642 | return 0; | |
5643 | ||
d01c980f | 5644 | case OFPACT_LEARN: |
c2d936a4 BP |
5645 | return learn_check(ofpact_get_LEARN(a), flow); |
5646 | ||
18080541 BP |
5647 | case OFPACT_CONJUNCTION: |
5648 | return 0; | |
5649 | ||
d01c980f | 5650 | case OFPACT_MULTIPATH: |
c2d936a4 BP |
5651 | return multipath_check(ofpact_get_MULTIPATH(a), flow); |
5652 | ||
d01c980f BP |
5653 | case OFPACT_NOTE: |
5654 | case OFPACT_EXIT: | |
c2d936a4 | 5655 | return 0; |
d01c980f | 5656 | |
c2d936a4 BP |
5657 | case OFPACT_PUSH_MPLS: |
5658 | flow->dl_type = ofpact_get_PUSH_MPLS(a)->ethertype; | |
5659 | /* The packet is now MPLS and the MPLS payload is opaque. | |
5660 | * Thus nothing can be assumed about the network protocol. | |
5661 | * Temporarily mark that we have no nw_proto. */ | |
5662 | flow->nw_proto = 0; | |
5663 | return 0; | |
1e7db674 | 5664 | |
c2d936a4 BP |
5665 | case OFPACT_POP_MPLS: |
5666 | if (!eth_type_mpls(flow->dl_type)) { | |
5667 | inconsistent_match(usable_protocols); | |
5668 | } | |
5669 | flow->dl_type = ofpact_get_POP_MPLS(a)->ethertype; | |
5670 | return 0; | |
1e7db674 | 5671 | |
c2d936a4 BP |
5672 | case OFPACT_SAMPLE: |
5673 | return 0; | |
1e7db674 | 5674 | |
c2d936a4 BP |
5675 | case OFPACT_CLEAR_ACTIONS: |
5676 | return 0; | |
1e7db674 | 5677 | |
c2d936a4 BP |
5678 | case OFPACT_WRITE_ACTIONS: { |
5679 | /* Use a temporary copy of 'usable_protocols' because we can't check | |
5680 | * consistency of an action set. */ | |
5681 | struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a); | |
5682 | enum ofputil_protocol p = *usable_protocols; | |
5683 | return ofpacts_check(on->actions, ofpact_nest_get_action_len(on), | |
5684 | flow, max_ports, table_id, n_tables, &p); | |
5685 | } | |
1e7db674 | 5686 | |
c2d936a4 BP |
5687 | case OFPACT_WRITE_METADATA: |
5688 | return 0; | |
1e7db674 | 5689 | |
c2d936a4 BP |
5690 | case OFPACT_METER: { |
5691 | uint32_t mid = ofpact_get_METER(a)->meter_id; | |
5692 | if (mid == 0 || mid > OFPM13_MAX) { | |
5693 | return OFPERR_OFPMMFC_INVALID_METER; | |
5694 | } | |
5695 | return 0; | |
5696 | } | |
1e7db674 | 5697 | |
c2d936a4 BP |
5698 | case OFPACT_GOTO_TABLE: { |
5699 | uint8_t goto_table = ofpact_get_GOTO_TABLE(a)->table_id; | |
5700 | if ((table_id != 255 && goto_table <= table_id) | |
5701 | || (n_tables != 255 && goto_table >= n_tables)) { | |
8c87971e | 5702 | return OFPERR_OFPBIC_BAD_TABLE_ID; |
c2d936a4 BP |
5703 | } |
5704 | return 0; | |
5705 | } | |
1e7db674 | 5706 | |
c2d936a4 BP |
5707 | case OFPACT_GROUP: |
5708 | return 0; | |
1e7db674 | 5709 | |
e672ff9b JR |
5710 | case OFPACT_UNROLL_XLATE: |
5711 | /* UNROLL is an internal action that should never be seen via | |
5712 | * OpenFlow. */ | |
5713 | return OFPERR_OFPBAC_BAD_TYPE; | |
5714 | ||
d4abaff5 BP |
5715 | case OFPACT_DEBUG_RECIRC: |
5716 | return 0; | |
5717 | ||
c2d936a4 BP |
5718 | default: |
5719 | OVS_NOT_REACHED(); | |
5720 | } | |
5721 | } | |
1e7db674 | 5722 | |
c2d936a4 BP |
5723 | /* Checks that the 'ofpacts_len' bytes of actions in 'ofpacts' are |
5724 | * appropriate for a packet with the prerequisites satisfied by 'flow' in a | |
5725 | * switch with no more than 'max_ports' ports. | |
5726 | * | |
5727 | * If 'ofpacts' and 'flow' are inconsistent with one another, un-sets in | |
5728 | * '*usable_protocols' the protocols that forbid the inconsistency. (An | |
5729 | * example of an inconsistency between match and actions is a flow that does | |
5730 | * not match on an MPLS Ethertype but has an action that pops an MPLS label.) | |
5731 | * | |
5732 | * May annotate ofpacts with information gathered from the 'flow'. | |
5733 | * | |
5734 | * May temporarily modify 'flow', but restores the changes before returning. */ | |
5735 | enum ofperr | |
5736 | ofpacts_check(struct ofpact ofpacts[], size_t ofpacts_len, | |
5737 | struct flow *flow, ofp_port_t max_ports, | |
5738 | uint8_t table_id, uint8_t n_tables, | |
5739 | enum ofputil_protocol *usable_protocols) | |
5740 | { | |
5741 | struct ofpact *a; | |
5742 | ovs_be16 dl_type = flow->dl_type; | |
5743 | ovs_be16 vlan_tci = flow->vlan_tci; | |
5744 | uint8_t nw_proto = flow->nw_proto; | |
5745 | enum ofperr error = 0; | |
1e7db674 | 5746 | |
c2d936a4 BP |
5747 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
5748 | error = ofpact_check__(usable_protocols, a, flow, | |
5749 | max_ports, table_id, n_tables); | |
5750 | if (error) { | |
1e7db674 | 5751 | break; |
c2d936a4 BP |
5752 | } |
5753 | } | |
5754 | /* Restore fields that may have been modified. */ | |
5755 | flow->dl_type = dl_type; | |
5756 | flow->vlan_tci = vlan_tci; | |
5757 | flow->nw_proto = nw_proto; | |
5758 | return error; | |
5759 | } | |
1e7db674 | 5760 | |
c2d936a4 BP |
5761 | /* Like ofpacts_check(), but reports inconsistencies as |
5762 | * OFPERR_OFPBAC_MATCH_INCONSISTENT rather than clearing bits. */ | |
5763 | enum ofperr | |
5764 | ofpacts_check_consistency(struct ofpact ofpacts[], size_t ofpacts_len, | |
5765 | struct flow *flow, ofp_port_t max_ports, | |
5766 | uint8_t table_id, uint8_t n_tables, | |
5767 | enum ofputil_protocol usable_protocols) | |
5768 | { | |
5769 | enum ofputil_protocol p = usable_protocols; | |
5770 | enum ofperr error; | |
1e7db674 | 5771 | |
c2d936a4 BP |
5772 | error = ofpacts_check(ofpacts, ofpacts_len, flow, max_ports, |
5773 | table_id, n_tables, &p); | |
5774 | return (error ? error | |
5775 | : p != usable_protocols ? OFPERR_OFPBAC_MATCH_INCONSISTENT | |
5776 | : 0); | |
5777 | } | |
097d4939 | 5778 | |
18080541 BP |
5779 | /* Verifies that the 'ofpacts_len' bytes of actions in 'ofpacts' are in the |
5780 | * appropriate order as defined by the OpenFlow spec and as required by Open | |
5781 | * vSwitch. | |
5782 | * | |
5783 | * 'allowed_ovsinsts' is a bitmap of OVSINST_* values, in which 1-bits indicate | |
5784 | * instructions that are allowed within 'ofpacts[]'. */ | |
c2d936a4 BP |
5785 | static enum ofperr |
5786 | ofpacts_verify(const struct ofpact ofpacts[], size_t ofpacts_len, | |
5787 | uint32_t allowed_ovsinsts) | |
5788 | { | |
5789 | const struct ofpact *a; | |
5790 | enum ovs_instruction_type inst; | |
097d4939 | 5791 | |
c2d936a4 BP |
5792 | inst = OVSINST_OFPIT13_METER; |
5793 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
5794 | enum ovs_instruction_type next; | |
1e7db674 | 5795 | |
18080541 BP |
5796 | if (a->type == OFPACT_CONJUNCTION) { |
5797 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
f08e39dd BP |
5798 | if (a->type != OFPACT_CONJUNCTION && a->type != OFPACT_NOTE) { |
5799 | VLOG_WARN("\"conjunction\" actions may be used along with " | |
5800 | "\"note\" but not any other kind of action " | |
5801 | "(such as the \"%s\" action used here)", | |
96775a1c | 5802 | ofpact_name(a->type)); |
18080541 BP |
5803 | return OFPERR_NXBAC_BAD_CONJUNCTION; |
5804 | } | |
5805 | } | |
5806 | return 0; | |
5807 | } | |
5808 | ||
c2d936a4 BP |
5809 | next = ovs_instruction_type_from_ofpact_type(a->type); |
5810 | if (a > ofpacts | |
5811 | && (inst == OVSINST_OFPIT11_APPLY_ACTIONS | |
5812 | ? next < inst | |
5813 | : next <= inst)) { | |
5814 | const char *name = ovs_instruction_name_from_type(inst); | |
5815 | const char *next_name = ovs_instruction_name_from_type(next); | |
1e7db674 | 5816 | |
c2d936a4 BP |
5817 | if (next == inst) { |
5818 | VLOG_WARN("duplicate %s instruction not allowed, for OpenFlow " | |
5819 | "1.1+ compatibility", name); | |
5820 | } else { | |
5821 | VLOG_WARN("invalid instruction ordering: %s must appear " | |
5822 | "before %s, for OpenFlow 1.1+ compatibility", | |
5823 | next_name, name); | |
5824 | } | |
5825 | return OFPERR_OFPBAC_UNSUPPORTED_ORDER; | |
5826 | } | |
5827 | if (!((1u << next) & allowed_ovsinsts)) { | |
5828 | const char *name = ovs_instruction_name_from_type(next); | |
1e7db674 | 5829 | |
c2d936a4 BP |
5830 | VLOG_WARN("%s instruction not allowed here", name); |
5831 | return OFPERR_OFPBIC_UNSUP_INST; | |
1e7db674 | 5832 | } |
c2d936a4 BP |
5833 | |
5834 | inst = next; | |
5835 | } | |
5836 | ||
5837 | return 0; | |
5838 | } | |
5839 | \f | |
5840 | /* Converting ofpacts to OpenFlow. */ | |
5841 | ||
5842 | static void | |
5843 | encode_ofpact(const struct ofpact *a, enum ofp_version ofp_version, | |
5844 | struct ofpbuf *out) | |
5845 | { | |
5846 | switch (a->type) { | |
5847 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
5848 | case OFPACT_##ENUM: \ | |
355ead69 GS |
5849 | encode_##ENUM(ofpact_get_##ENUM(a), ofp_version, out); \ |
5850 | return; | |
c2d936a4 BP |
5851 | OFPACTS |
5852 | #undef OFPACT | |
5853 | default: | |
5854 | OVS_NOT_REACHED(); | |
1e7db674 | 5855 | } |
e3f8f887 JR |
5856 | } |
5857 | ||
5858 | /* Converts the 'ofpacts_len' bytes of ofpacts in 'ofpacts' into OpenFlow | |
5859 | * actions in 'openflow', appending the actions to any existing data in | |
d01c980f | 5860 | * 'openflow'. */ |
a07c15bc | 5861 | size_t |
e3f8f887 JR |
5862 | ofpacts_put_openflow_actions(const struct ofpact ofpacts[], size_t ofpacts_len, |
5863 | struct ofpbuf *openflow, | |
5864 | enum ofp_version ofp_version) | |
d01c980f BP |
5865 | { |
5866 | const struct ofpact *a; | |
6fd6ed71 | 5867 | size_t start_size = openflow->size; |
d01c980f BP |
5868 | |
5869 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
c2d936a4 | 5870 | encode_ofpact(a, ofp_version, openflow); |
d01c980f | 5871 | } |
6fd6ed71 | 5872 | return openflow->size - start_size; |
d01c980f BP |
5873 | } |
5874 | ||
c2d936a4 BP |
5875 | static enum ovs_instruction_type |
5876 | ofpact_is_apply_actions(const struct ofpact *a) | |
d01c980f | 5877 | { |
c2d936a4 BP |
5878 | return (ovs_instruction_type_from_ofpact_type(a->type) |
5879 | == OVSINST_OFPIT11_APPLY_ACTIONS); | |
d01c980f | 5880 | } |
8dd54666 IY |
5881 | |
5882 | void | |
e3f8f887 JR |
5883 | ofpacts_put_openflow_instructions(const struct ofpact ofpacts[], |
5884 | size_t ofpacts_len, | |
5885 | struct ofpbuf *openflow, | |
5886 | enum ofp_version ofp_version) | |
8dd54666 | 5887 | { |
c2d936a4 | 5888 | const struct ofpact *end = ofpact_end(ofpacts, ofpacts_len); |
8dd54666 IY |
5889 | const struct ofpact *a; |
5890 | ||
8f2cded4 BP |
5891 | if (ofp_version == OFP10_VERSION) { |
5892 | ofpacts_put_openflow_actions(ofpacts, ofpacts_len, openflow, | |
5893 | ofp_version); | |
5894 | return; | |
5895 | } | |
e3f8f887 | 5896 | |
c2d936a4 BP |
5897 | a = ofpacts; |
5898 | while (a < end) { | |
5899 | if (ofpact_is_apply_actions(a)) { | |
6fd6ed71 | 5900 | size_t ofs = openflow->size; |
8dd54666 IY |
5901 | |
5902 | instruction_put_OFPIT11_APPLY_ACTIONS(openflow); | |
c2d936a4 BP |
5903 | do { |
5904 | encode_ofpact(a, ofp_version, openflow); | |
5905 | a = ofpact_next(a); | |
5906 | } while (a < end && ofpact_is_apply_actions(a)); | |
7fdb60a7 | 5907 | ofpacts_update_instruction_actions(openflow, ofs); |
c2d936a4 BP |
5908 | } else { |
5909 | encode_ofpact(a, ofp_version, openflow); | |
5910 | a = ofpact_next(a); | |
8dd54666 IY |
5911 | } |
5912 | } | |
5913 | } | |
d01c980f | 5914 | \f |
08d1e234 BP |
5915 | /* Sets of supported actions. */ |
5916 | ||
5917 | /* Two-way translation between OVS's internal "OFPACT_*" representation of | |
5918 | * actions and the "OFPAT_*" representation used in some OpenFlow version. | |
5919 | * (OFPAT_* numbering varies from one OpenFlow version to another, so a given | |
5920 | * instance is specific to one OpenFlow version.) */ | |
5921 | struct ofpact_map { | |
5922 | enum ofpact_type ofpact; /* Internal name for action type. */ | |
5923 | int ofpat; /* OFPAT_* number from OpenFlow spec. */ | |
5924 | }; | |
5925 | ||
5926 | static const struct ofpact_map * | |
5927 | get_ofpact_map(enum ofp_version version) | |
5928 | { | |
5929 | /* OpenFlow 1.0 actions. */ | |
5930 | static const struct ofpact_map of10[] = { | |
5931 | { OFPACT_OUTPUT, 0 }, | |
5932 | { OFPACT_SET_VLAN_VID, 1 }, | |
5933 | { OFPACT_SET_VLAN_PCP, 2 }, | |
5934 | { OFPACT_STRIP_VLAN, 3 }, | |
5935 | { OFPACT_SET_ETH_SRC, 4 }, | |
5936 | { OFPACT_SET_ETH_DST, 5 }, | |
5937 | { OFPACT_SET_IPV4_SRC, 6 }, | |
5938 | { OFPACT_SET_IPV4_DST, 7 }, | |
5939 | { OFPACT_SET_IP_DSCP, 8 }, | |
5940 | { OFPACT_SET_L4_SRC_PORT, 9 }, | |
5941 | { OFPACT_SET_L4_DST_PORT, 10 }, | |
5942 | { OFPACT_ENQUEUE, 11 }, | |
5943 | { 0, -1 }, | |
5944 | }; | |
5945 | ||
5946 | /* OpenFlow 1.1 actions. */ | |
5947 | static const struct ofpact_map of11[] = { | |
5948 | { OFPACT_OUTPUT, 0 }, | |
5949 | { OFPACT_SET_VLAN_VID, 1 }, | |
5950 | { OFPACT_SET_VLAN_PCP, 2 }, | |
5951 | { OFPACT_SET_ETH_SRC, 3 }, | |
5952 | { OFPACT_SET_ETH_DST, 4 }, | |
5953 | { OFPACT_SET_IPV4_SRC, 5 }, | |
5954 | { OFPACT_SET_IPV4_DST, 6 }, | |
5955 | { OFPACT_SET_IP_DSCP, 7 }, | |
5956 | { OFPACT_SET_IP_ECN, 8 }, | |
5957 | { OFPACT_SET_L4_SRC_PORT, 9 }, | |
5958 | { OFPACT_SET_L4_DST_PORT, 10 }, | |
5959 | /* OFPAT_COPY_TTL_OUT (11) not supported. */ | |
5960 | /* OFPAT_COPY_TTL_IN (12) not supported. */ | |
5961 | { OFPACT_SET_MPLS_LABEL, 13 }, | |
5962 | { OFPACT_SET_MPLS_TC, 14 }, | |
5963 | { OFPACT_SET_MPLS_TTL, 15 }, | |
5964 | { OFPACT_DEC_MPLS_TTL, 16 }, | |
5965 | { OFPACT_PUSH_VLAN, 17 }, | |
5966 | { OFPACT_STRIP_VLAN, 18 }, | |
5967 | { OFPACT_PUSH_MPLS, 19 }, | |
5968 | { OFPACT_POP_MPLS, 20 }, | |
5969 | { OFPACT_SET_QUEUE, 21 }, | |
5970 | { OFPACT_GROUP, 22 }, | |
5971 | { OFPACT_SET_IP_TTL, 23 }, | |
5972 | { OFPACT_DEC_TTL, 24 }, | |
5973 | { 0, -1 }, | |
5974 | }; | |
5975 | ||
5976 | /* OpenFlow 1.2, 1.3, and 1.4 actions. */ | |
5977 | static const struct ofpact_map of12[] = { | |
5978 | { OFPACT_OUTPUT, 0 }, | |
5979 | /* OFPAT_COPY_TTL_OUT (11) not supported. */ | |
5980 | /* OFPAT_COPY_TTL_IN (12) not supported. */ | |
5981 | { OFPACT_SET_MPLS_TTL, 15 }, | |
5982 | { OFPACT_DEC_MPLS_TTL, 16 }, | |
5983 | { OFPACT_PUSH_VLAN, 17 }, | |
5984 | { OFPACT_STRIP_VLAN, 18 }, | |
5985 | { OFPACT_PUSH_MPLS, 19 }, | |
5986 | { OFPACT_POP_MPLS, 20 }, | |
5987 | { OFPACT_SET_QUEUE, 21 }, | |
5988 | { OFPACT_GROUP, 22 }, | |
5989 | { OFPACT_SET_IP_TTL, 23 }, | |
5990 | { OFPACT_DEC_TTL, 24 }, | |
5991 | { OFPACT_SET_FIELD, 25 }, | |
5992 | /* OF1.3+ OFPAT_PUSH_PBB (26) not supported. */ | |
5993 | /* OF1.3+ OFPAT_POP_PBB (27) not supported. */ | |
5994 | { 0, -1 }, | |
5995 | }; | |
5996 | ||
5997 | switch (version) { | |
5998 | case OFP10_VERSION: | |
5999 | return of10; | |
6000 | ||
6001 | case OFP11_VERSION: | |
6002 | return of11; | |
6003 | ||
6004 | case OFP12_VERSION: | |
6005 | case OFP13_VERSION: | |
6006 | case OFP14_VERSION: | |
6007 | case OFP15_VERSION: | |
6008 | default: | |
6009 | return of12; | |
6010 | } | |
6011 | } | |
6012 | ||
6013 | /* Converts 'ofpacts_bitmap', a bitmap whose bits correspond to OFPACT_* | |
6014 | * values, into a bitmap of actions suitable for OpenFlow 'version', and | |
6015 | * returns the result. */ | |
6016 | ovs_be32 | |
6017 | ofpact_bitmap_to_openflow(uint64_t ofpacts_bitmap, enum ofp_version version) | |
6018 | { | |
6019 | uint32_t openflow_bitmap = 0; | |
6020 | const struct ofpact_map *x; | |
6021 | ||
6022 | for (x = get_ofpact_map(version); x->ofpat >= 0; x++) { | |
6023 | if (ofpacts_bitmap & (UINT64_C(1) << x->ofpact)) { | |
6024 | openflow_bitmap |= 1u << x->ofpat; | |
6025 | } | |
6026 | } | |
6027 | return htonl(openflow_bitmap); | |
6028 | } | |
6029 | ||
6030 | /* Converts 'ofpat_bitmap', a bitmap of actions from an OpenFlow message with | |
6031 | * the given 'version' into a bitmap whose bits correspond to OFPACT_* values, | |
6032 | * and returns the result. */ | |
6033 | uint64_t | |
6034 | ofpact_bitmap_from_openflow(ovs_be32 ofpat_bitmap, enum ofp_version version) | |
6035 | { | |
6036 | uint64_t ofpact_bitmap = 0; | |
6037 | const struct ofpact_map *x; | |
6038 | ||
6039 | for (x = get_ofpact_map(version); x->ofpat >= 0; x++) { | |
6040 | if (ofpat_bitmap & htonl(1u << x->ofpat)) { | |
6041 | ofpact_bitmap |= UINT64_C(1) << x->ofpact; | |
6042 | } | |
6043 | } | |
6044 | return ofpact_bitmap; | |
6045 | } | |
6046 | ||
6047 | /* Appends to 's' a string representation of the set of OFPACT_* represented | |
6048 | * by 'ofpacts_bitmap'. */ | |
6049 | void | |
6050 | ofpact_bitmap_format(uint64_t ofpacts_bitmap, struct ds *s) | |
6051 | { | |
6052 | if (!ofpacts_bitmap) { | |
6053 | ds_put_cstr(s, "<none>"); | |
6054 | } else { | |
6055 | while (ofpacts_bitmap) { | |
6056 | ds_put_format(s, "%s ", | |
6057 | ofpact_name(rightmost_1bit_idx(ofpacts_bitmap))); | |
6058 | ofpacts_bitmap = zero_rightmost_1bit(ofpacts_bitmap); | |
6059 | } | |
6060 | ds_chomp(s, ' '); | |
6061 | } | |
6062 | } | |
6063 | \f | |
f25d0cf3 BP |
6064 | /* Returns true if 'action' outputs to 'port', false otherwise. */ |
6065 | static bool | |
4e022ec0 | 6066 | ofpact_outputs_to_port(const struct ofpact *ofpact, ofp_port_t port) |
f25d0cf3 BP |
6067 | { |
6068 | switch (ofpact->type) { | |
6069 | case OFPACT_OUTPUT: | |
6070 | return ofpact_get_OUTPUT(ofpact)->port == port; | |
6071 | case OFPACT_ENQUEUE: | |
6072 | return ofpact_get_ENQUEUE(ofpact)->port == port; | |
6073 | case OFPACT_CONTROLLER: | |
6074 | return port == OFPP_CONTROLLER; | |
6075 | ||
6076 | case OFPACT_OUTPUT_REG: | |
6077 | case OFPACT_BUNDLE: | |
6078 | case OFPACT_SET_VLAN_VID: | |
6079 | case OFPACT_SET_VLAN_PCP: | |
6080 | case OFPACT_STRIP_VLAN: | |
3e34fbdd | 6081 | case OFPACT_PUSH_VLAN: |
f25d0cf3 BP |
6082 | case OFPACT_SET_ETH_SRC: |
6083 | case OFPACT_SET_ETH_DST: | |
6084 | case OFPACT_SET_IPV4_SRC: | |
6085 | case OFPACT_SET_IPV4_DST: | |
04f01c24 | 6086 | case OFPACT_SET_IP_DSCP: |
ff14eb7a | 6087 | case OFPACT_SET_IP_ECN: |
0c20dbe4 | 6088 | case OFPACT_SET_IP_TTL: |
f25d0cf3 BP |
6089 | case OFPACT_SET_L4_SRC_PORT: |
6090 | case OFPACT_SET_L4_DST_PORT: | |
6091 | case OFPACT_REG_MOVE: | |
b2dd70be | 6092 | case OFPACT_SET_FIELD: |
bd85dac1 AZ |
6093 | case OFPACT_STACK_PUSH: |
6094 | case OFPACT_STACK_POP: | |
f25d0cf3 | 6095 | case OFPACT_DEC_TTL: |
097d4939 JR |
6096 | case OFPACT_SET_MPLS_LABEL: |
6097 | case OFPACT_SET_MPLS_TC: | |
0f3f3c3d | 6098 | case OFPACT_SET_MPLS_TTL: |
b676167a | 6099 | case OFPACT_DEC_MPLS_TTL: |
f25d0cf3 | 6100 | case OFPACT_SET_TUNNEL: |
4cceacb9 | 6101 | case OFPACT_WRITE_METADATA: |
f25d0cf3 BP |
6102 | case OFPACT_SET_QUEUE: |
6103 | case OFPACT_POP_QUEUE: | |
6104 | case OFPACT_FIN_TIMEOUT: | |
6105 | case OFPACT_RESUBMIT: | |
6106 | case OFPACT_LEARN: | |
18080541 | 6107 | case OFPACT_CONJUNCTION: |
f25d0cf3 | 6108 | case OFPACT_MULTIPATH: |
f25d0cf3 BP |
6109 | case OFPACT_NOTE: |
6110 | case OFPACT_EXIT: | |
e672ff9b | 6111 | case OFPACT_UNROLL_XLATE: |
b02475c5 SH |
6112 | case OFPACT_PUSH_MPLS: |
6113 | case OFPACT_POP_MPLS: | |
29089a54 | 6114 | case OFPACT_SAMPLE: |
b19e8793 | 6115 | case OFPACT_CLEAR_ACTIONS: |
7fdb60a7 | 6116 | case OFPACT_WRITE_ACTIONS: |
8dd54666 | 6117 | case OFPACT_GOTO_TABLE: |
638a19b0 | 6118 | case OFPACT_METER: |
7395c052 | 6119 | case OFPACT_GROUP: |
d4abaff5 | 6120 | case OFPACT_DEBUG_RECIRC: |
f25d0cf3 BP |
6121 | default: |
6122 | return false; | |
6123 | } | |
6124 | } | |
6125 | ||
6126 | /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs | |
6127 | * to 'port', false otherwise. */ | |
6128 | bool | |
6129 | ofpacts_output_to_port(const struct ofpact *ofpacts, size_t ofpacts_len, | |
4e022ec0 | 6130 | ofp_port_t port) |
c2d936a4 BP |
6131 | { |
6132 | const struct ofpact *a; | |
f25d0cf3 | 6133 | |
c2d936a4 BP |
6134 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
6135 | if (ofpact_outputs_to_port(a, port)) { | |
6136 | return true; | |
6137 | } | |
6138 | } | |
f25d0cf3 | 6139 | |
c2d936a4 BP |
6140 | return false; |
6141 | } | |
f25d0cf3 | 6142 | |
c2d936a4 BP |
6143 | /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs |
6144 | * to 'group', false otherwise. */ | |
6145 | bool | |
6146 | ofpacts_output_to_group(const struct ofpact *ofpacts, size_t ofpacts_len, | |
6147 | uint32_t group_id) | |
6148 | { | |
6149 | const struct ofpact *a; | |
b02475c5 | 6150 | |
c2d936a4 BP |
6151 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
6152 | if (a->type == OFPACT_GROUP | |
6153 | && ofpact_get_GROUP(a)->group_id == group_id) { | |
6154 | return true; | |
6155 | } | |
6156 | } | |
b02475c5 | 6157 | |
c2d936a4 BP |
6158 | return false; |
6159 | } | |
8dd54666 | 6160 | |
c2d936a4 BP |
6161 | bool |
6162 | ofpacts_equal(const struct ofpact *a, size_t a_len, | |
6163 | const struct ofpact *b, size_t b_len) | |
6164 | { | |
6165 | return a_len == b_len && !memcmp(a, b, a_len); | |
6166 | } | |
29089a54 | 6167 | |
c2d936a4 BP |
6168 | /* Finds the OFPACT_METER action, if any, in the 'ofpacts_len' bytes of |
6169 | * 'ofpacts'. If found, returns its meter ID; if not, returns 0. | |
6170 | * | |
6171 | * This function relies on the order of 'ofpacts' being correct (as checked by | |
6172 | * ofpacts_verify()). */ | |
6173 | uint32_t | |
6174 | ofpacts_get_meter(const struct ofpact ofpacts[], size_t ofpacts_len) | |
6175 | { | |
6176 | const struct ofpact *a; | |
7fdb60a7 | 6177 | |
c2d936a4 BP |
6178 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
6179 | enum ovs_instruction_type inst; | |
b19e8793 | 6180 | |
c2d936a4 BP |
6181 | inst = ovs_instruction_type_from_ofpact_type(a->type); |
6182 | if (a->type == OFPACT_METER) { | |
6183 | return ofpact_get_METER(a)->meter_id; | |
6184 | } else if (inst > OVSINST_OFPIT13_METER) { | |
6185 | break; | |
4cceacb9 | 6186 | } |
c2d936a4 | 6187 | } |
638a19b0 | 6188 | |
c2d936a4 BP |
6189 | return 0; |
6190 | } | |
6191 | \f | |
6192 | /* Formatting ofpacts. */ | |
7395c052 | 6193 | |
c2d936a4 BP |
6194 | static void |
6195 | ofpact_format(const struct ofpact *a, struct ds *s) | |
6196 | { | |
6197 | switch (a->type) { | |
6198 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
6199 | case OFPACT_##ENUM: \ | |
6200 | format_##ENUM(ALIGNED_CAST(const struct STRUCT *, a), s); \ | |
6201 | break; | |
6202 | OFPACTS | |
6203 | #undef OFPACT | |
6204 | default: | |
6205 | OVS_NOT_REACHED(); | |
f25d0cf3 BP |
6206 | } |
6207 | } | |
6208 | ||
6209 | /* Appends a string representing the 'ofpacts_len' bytes of ofpacts in | |
6210 | * 'ofpacts' to 'string'. */ | |
6211 | void | |
6212 | ofpacts_format(const struct ofpact *ofpacts, size_t ofpacts_len, | |
6213 | struct ds *string) | |
6214 | { | |
f25d0cf3 BP |
6215 | if (!ofpacts_len) { |
6216 | ds_put_cstr(string, "drop"); | |
6217 | } else { | |
6218 | const struct ofpact *a; | |
6219 | ||
6220 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { | |
6221 | if (a != ofpacts) { | |
6222 | ds_put_cstr(string, ","); | |
6223 | } | |
8dd54666 | 6224 | |
5dca28b5 | 6225 | /* XXX write-actions */ |
f25d0cf3 BP |
6226 | ofpact_format(a, string); |
6227 | } | |
6228 | } | |
6229 | } | |
6230 | \f | |
6231 | /* Internal use by helpers. */ | |
6232 | ||
6233 | void * | |
6234 | ofpact_put(struct ofpbuf *ofpacts, enum ofpact_type type, size_t len) | |
6235 | { | |
6236 | struct ofpact *ofpact; | |
6237 | ||
6238 | ofpact_pad(ofpacts); | |
6fd6ed71 PS |
6239 | ofpacts->header = ofpbuf_put_uninit(ofpacts, len); |
6240 | ofpact = ofpacts->header; | |
f25d0cf3 BP |
6241 | ofpact_init(ofpact, type, len); |
6242 | return ofpact; | |
6243 | } | |
6244 | ||
6245 | void | |
6246 | ofpact_init(struct ofpact *ofpact, enum ofpact_type type, size_t len) | |
6247 | { | |
6248 | memset(ofpact, 0, len); | |
6249 | ofpact->type = type; | |
c2d936a4 | 6250 | ofpact->raw = -1; |
f25d0cf3 BP |
6251 | ofpact->len = len; |
6252 | } | |
6253 | \f | |
6254 | /* Updates 'ofpact->len' to the number of bytes in the tail of 'ofpacts' | |
6255 | * starting at 'ofpact'. | |
6256 | * | |
6257 | * This is the correct way to update a variable-length ofpact's length after | |
6258 | * adding the variable-length part of the payload. (See the large comment | |
6259 | * near the end of ofp-actions.h for more information.) */ | |
6260 | void | |
6261 | ofpact_update_len(struct ofpbuf *ofpacts, struct ofpact *ofpact) | |
6262 | { | |
6fd6ed71 | 6263 | ovs_assert(ofpact == ofpacts->header); |
f25d0cf3 BP |
6264 | ofpact->len = (char *) ofpbuf_tail(ofpacts) - (char *) ofpact; |
6265 | } | |
6266 | ||
6267 | /* Pads out 'ofpacts' to a multiple of OFPACT_ALIGNTO bytes in length. Each | |
6268 | * ofpact_put_<ENUM>() calls this function automatically beforehand, but the | |
6269 | * client must call this itself after adding the final ofpact to an array of | |
6270 | * them. | |
6271 | * | |
6272 | * (The consequences of failing to call this function are probably not dire. | |
6273 | * OFPACT_FOR_EACH will calculate a pointer beyond the end of the ofpacts, but | |
6274 | * not dereference it. That's undefined behavior, technically, but it will not | |
6275 | * cause a real problem on common systems. Still, it seems better to call | |
6276 | * it.) */ | |
6277 | void | |
6278 | ofpact_pad(struct ofpbuf *ofpacts) | |
6279 | { | |
6fd6ed71 | 6280 | unsigned int pad = PAD_SIZE(ofpacts->size, OFPACT_ALIGNTO); |
f6e984d7 BP |
6281 | if (pad) { |
6282 | ofpbuf_put_zeros(ofpacts, pad); | |
f25d0cf3 BP |
6283 | } |
6284 | } | |
c2d936a4 BP |
6285 | \f |
6286 | ||
6287 | ||
6288 | ||
cab50449 | 6289 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
6290 | ofpact_parse(enum ofpact_type type, char *value, struct ofpbuf *ofpacts, |
6291 | enum ofputil_protocol *usable_protocols) | |
6292 | { | |
6293 | switch (type) { | |
6294 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
6295 | case OFPACT_##ENUM: \ | |
6296 | return parse_##ENUM(value, ofpacts, usable_protocols); | |
6297 | OFPACTS | |
6298 | #undef OFPACT | |
6299 | default: | |
6300 | OVS_NOT_REACHED(); | |
6301 | } | |
6302 | } | |
6303 | ||
6304 | static bool | |
6305 | ofpact_type_from_name(const char *name, enum ofpact_type *type) | |
6306 | { | |
6307 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) \ | |
6308 | if (!strcasecmp(name, NAME)) { \ | |
6309 | *type = OFPACT_##ENUM; \ | |
6310 | return true; \ | |
6311 | } | |
6312 | OFPACTS | |
6313 | #undef OFPACT | |
6314 | ||
6315 | return false; | |
6316 | } | |
6317 | ||
6318 | /* Parses 'str' as a series of instructions, and appends them to 'ofpacts'. | |
6319 | * | |
6320 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
6321 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 6322 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
6323 | ofpacts_parse__(char *str, struct ofpbuf *ofpacts, |
6324 | enum ofputil_protocol *usable_protocols, | |
6325 | bool allow_instructions) | |
6326 | { | |
6327 | int prev_inst = -1; | |
6328 | enum ofperr retval; | |
6329 | char *key, *value; | |
6330 | bool drop = false; | |
6331 | char *pos; | |
6332 | ||
6333 | pos = str; | |
6334 | while (ofputil_parse_key_value(&pos, &key, &value)) { | |
6335 | enum ovs_instruction_type inst = OVSINST_OFPIT11_APPLY_ACTIONS; | |
6336 | enum ofpact_type type; | |
6337 | char *error = NULL; | |
6338 | ofp_port_t port; | |
6339 | ||
6340 | if (ofpact_type_from_name(key, &type)) { | |
6341 | error = ofpact_parse(type, value, ofpacts, usable_protocols); | |
6342 | inst = ovs_instruction_type_from_ofpact_type(type); | |
6343 | } else if (!strcasecmp(key, "mod_vlan_vid")) { | |
6344 | error = parse_set_vlan_vid(value, ofpacts, true); | |
6345 | } else if (!strcasecmp(key, "mod_vlan_pcp")) { | |
6346 | error = parse_set_vlan_pcp(value, ofpacts, true); | |
6347 | } else if (!strcasecmp(key, "set_nw_ttl")) { | |
6348 | error = parse_SET_IP_TTL(value, ofpacts, usable_protocols); | |
6349 | } else if (!strcasecmp(key, "pop_vlan")) { | |
6350 | error = parse_pop_vlan(ofpacts); | |
6351 | } else if (!strcasecmp(key, "set_tunnel64")) { | |
6352 | error = parse_set_tunnel(value, ofpacts, | |
6353 | NXAST_RAW_SET_TUNNEL64); | |
7eb4b1f1 BP |
6354 | } else if (!strcasecmp(key, "load")) { |
6355 | error = parse_reg_load(value, ofpacts); | |
c2d936a4 BP |
6356 | } else if (!strcasecmp(key, "bundle_load")) { |
6357 | error = parse_bundle_load(value, ofpacts); | |
6358 | } else if (!strcasecmp(key, "drop")) { | |
6359 | drop = true; | |
6360 | } else if (!strcasecmp(key, "apply_actions")) { | |
6361 | return xstrdup("apply_actions is the default instruction"); | |
6362 | } else if (ofputil_port_from_string(key, &port)) { | |
6363 | ofpact_put_OUTPUT(ofpacts)->port = port; | |
6364 | } else { | |
6365 | return xasprintf("unknown action %s", key); | |
6366 | } | |
6367 | if (error) { | |
6368 | return error; | |
6369 | } | |
6370 | ||
6371 | if (inst != OVSINST_OFPIT11_APPLY_ACTIONS) { | |
6372 | if (!allow_instructions) { | |
6373 | return xasprintf("only actions are allowed here (not " | |
6374 | "instruction %s)", | |
6375 | ovs_instruction_name_from_type(inst)); | |
6376 | } | |
6377 | if (inst == prev_inst) { | |
6378 | return xasprintf("instruction %s may be specified only once", | |
6379 | ovs_instruction_name_from_type(inst)); | |
6380 | } | |
6381 | } | |
6382 | if (prev_inst != -1 && inst < prev_inst) { | |
6383 | return xasprintf("instruction %s must be specified before %s", | |
6384 | ovs_instruction_name_from_type(inst), | |
6385 | ovs_instruction_name_from_type(prev_inst)); | |
6386 | } | |
6387 | prev_inst = inst; | |
6388 | } | |
6389 | ofpact_pad(ofpacts); | |
6390 | ||
6fd6ed71 | 6391 | if (drop && ofpacts->size) { |
c2d936a4 BP |
6392 | return xstrdup("\"drop\" must not be accompanied by any other action " |
6393 | "or instruction"); | |
6394 | } | |
6395 | ||
6fd6ed71 | 6396 | retval = ofpacts_verify(ofpacts->data, ofpacts->size, |
c2d936a4 BP |
6397 | (allow_instructions |
6398 | ? (1u << N_OVS_INSTRUCTIONS) - 1 | |
6399 | : 1u << OVSINST_OFPIT11_APPLY_ACTIONS)); | |
6400 | if (retval) { | |
6401 | return xstrdup("Incorrect instruction ordering"); | |
6402 | } | |
6403 | ||
6404 | return NULL; | |
6405 | } | |
6406 | ||
cab50449 | 6407 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
6408 | ofpacts_parse(char *str, struct ofpbuf *ofpacts, |
6409 | enum ofputil_protocol *usable_protocols, bool allow_instructions) | |
6410 | { | |
6fd6ed71 | 6411 | uint32_t orig_size = ofpacts->size; |
c2d936a4 BP |
6412 | char *error = ofpacts_parse__(str, ofpacts, usable_protocols, |
6413 | allow_instructions); | |
6414 | if (error) { | |
6fd6ed71 | 6415 | ofpacts->size = orig_size; |
c2d936a4 BP |
6416 | } |
6417 | return error; | |
6418 | } | |
6419 | ||
cab50449 | 6420 | static char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
6421 | ofpacts_parse_copy(const char *s_, struct ofpbuf *ofpacts, |
6422 | enum ofputil_protocol *usable_protocols, | |
6423 | bool allow_instructions) | |
6424 | { | |
6425 | char *error, *s; | |
6426 | ||
6427 | *usable_protocols = OFPUTIL_P_ANY; | |
6428 | ||
6429 | s = xstrdup(s_); | |
6430 | error = ofpacts_parse(s, ofpacts, usable_protocols, allow_instructions); | |
6431 | free(s); | |
6432 | ||
6433 | return error; | |
6434 | } | |
6435 | ||
6436 | /* Parses 's' as a set of OpenFlow actions and appends the actions to | |
6437 | * 'ofpacts'. | |
6438 | * | |
6439 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
6440 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 6441 | char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
6442 | ofpacts_parse_actions(const char *s, struct ofpbuf *ofpacts, |
6443 | enum ofputil_protocol *usable_protocols) | |
6444 | { | |
6445 | return ofpacts_parse_copy(s, ofpacts, usable_protocols, false); | |
6446 | } | |
6447 | ||
6448 | /* Parses 's' as a set of OpenFlow instructions and appends the instructions to | |
6449 | * 'ofpacts'. | |
6450 | * | |
6451 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
6452 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 6453 | char * OVS_WARN_UNUSED_RESULT |
c2d936a4 BP |
6454 | ofpacts_parse_instructions(const char *s, struct ofpbuf *ofpacts, |
6455 | enum ofputil_protocol *usable_protocols) | |
6456 | { | |
6457 | return ofpacts_parse_copy(s, ofpacts, usable_protocols, true); | |
6458 | } | |
08d1e234 BP |
6459 | |
6460 | const char * | |
6461 | ofpact_name(enum ofpact_type type) | |
6462 | { | |
6463 | switch (type) { | |
6464 | #define OFPACT(ENUM, STRUCT, MEMBER, NAME) case OFPACT_##ENUM: return NAME; | |
6465 | OFPACTS | |
6466 | #undef OFPACT | |
6467 | } | |
6468 | return "<unknown>"; | |
6469 | } | |
c2d936a4 BP |
6470 | \f |
6471 | /* Low-level action decoding and encoding functions. */ | |
6472 | ||
6473 | /* Everything needed to identify a particular OpenFlow action. */ | |
6474 | struct ofpact_hdrs { | |
6475 | uint32_t vendor; /* 0 if standard, otherwise a vendor code. */ | |
6476 | uint16_t type; /* Type if standard, otherwise subtype. */ | |
6477 | uint8_t ofp_version; /* From ofp_header. */ | |
6478 | }; | |
6479 | ||
6480 | /* Information about a particular OpenFlow action. */ | |
6481 | struct ofpact_raw_instance { | |
6482 | /* The action's identity. */ | |
6483 | struct ofpact_hdrs hdrs; | |
6484 | enum ofp_raw_action_type raw; | |
6485 | ||
6486 | /* Looking up the action. */ | |
6487 | struct hmap_node decode_node; /* Based on 'hdrs'. */ | |
6488 | struct hmap_node encode_node; /* Based on 'raw' + 'hdrs.ofp_version'. */ | |
6489 | ||
6490 | /* The action's encoded size. | |
6491 | * | |
6492 | * If this action is fixed-length, 'min_length' == 'max_length'. | |
6493 | * If it is variable length, then 'max_length' is ROUND_DOWN(UINT16_MAX, | |
6494 | * OFP_ACTION_ALIGN) == 65528. */ | |
6495 | unsigned short int min_length; | |
6496 | unsigned short int max_length; | |
6497 | ||
6498 | /* For actions with a simple integer numeric argument, 'arg_ofs' is the | |
6499 | * offset of that argument from the beginning of the action and 'arg_len' | |
6500 | * its length, both in bytes. | |
6501 | * | |
6502 | * For actions that take other forms, these are both zero. */ | |
6503 | unsigned short int arg_ofs; | |
6504 | unsigned short int arg_len; | |
6505 | ||
6506 | /* The name of the action, e.g. "OFPAT_OUTPUT" or "NXAST_RESUBMIT". */ | |
6507 | const char *name; | |
6508 | ||
6509 | /* If this action is deprecated, a human-readable string with a brief | |
6510 | * explanation. */ | |
6511 | const char *deprecation; | |
6512 | }; | |
6513 | ||
6514 | /* Action header. */ | |
6515 | struct ofp_action_header { | |
6516 | /* The meaning of other values of 'type' generally depends on the OpenFlow | |
6517 | * version (see enum ofp_raw_action_type). | |
6518 | * | |
6519 | * Across all OpenFlow versions, OFPAT_VENDOR indicates that 'vendor' | |
6520 | * designates an OpenFlow vendor ID and that the remainder of the action | |
6521 | * structure has a vendor-defined meaning. | |
6522 | */ | |
6523 | #define OFPAT_VENDOR 0xffff | |
6524 | ovs_be16 type; | |
6525 | ||
6526 | /* Always a multiple of 8. */ | |
6527 | ovs_be16 len; | |
6528 | ||
6529 | /* For type == OFPAT_VENDOR only, this is a vendor ID, e.g. NX_VENDOR_ID or | |
6530 | * ONF_VENDOR_ID. Other 'type's use this space for some other purpose. */ | |
6531 | ovs_be32 vendor; | |
6532 | }; | |
6533 | OFP_ASSERT(sizeof(struct ofp_action_header) == 8); | |
6534 | ||
232c1e12 BP |
6535 | /* Header for Nicira-defined actions and for ONF vendor extensions. |
6536 | * | |
6537 | * This cannot be used as an entirely generic vendor extension action header, | |
6538 | * because OpenFlow does not specify the location or size of the action | |
6539 | * subtype; it just happens that ONF extensions and Nicira extensions share | |
6540 | * this format. */ | |
6541 | struct ext_action_header { | |
c2d936a4 BP |
6542 | ovs_be16 type; /* OFPAT_VENDOR. */ |
6543 | ovs_be16 len; /* At least 16. */ | |
232c1e12 | 6544 | ovs_be32 vendor; /* NX_VENDOR_ID or ONF_VENDOR_ID. */ |
c2d936a4 BP |
6545 | ovs_be16 subtype; /* See enum ofp_raw_action_type. */ |
6546 | uint8_t pad[6]; | |
6547 | }; | |
232c1e12 | 6548 | OFP_ASSERT(sizeof(struct ext_action_header) == 16); |
c2d936a4 BP |
6549 | |
6550 | static bool | |
6551 | ofpact_hdrs_equal(const struct ofpact_hdrs *a, | |
6552 | const struct ofpact_hdrs *b) | |
6553 | { | |
6554 | return (a->vendor == b->vendor | |
6555 | && a->type == b->type | |
6556 | && a->ofp_version == b->ofp_version); | |
6557 | } | |
6558 | ||
6559 | static uint32_t | |
6560 | ofpact_hdrs_hash(const struct ofpact_hdrs *hdrs) | |
6561 | { | |
6562 | return hash_2words(hdrs->vendor, (hdrs->type << 16) | hdrs->ofp_version); | |
6563 | } | |
6564 | ||
6565 | #include "ofp-actions.inc2" | |
6566 | ||
6567 | static struct hmap * | |
6568 | ofpact_decode_hmap(void) | |
6569 | { | |
6570 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
6571 | static struct hmap hmap; | |
6572 | ||
6573 | if (ovsthread_once_start(&once)) { | |
6574 | struct ofpact_raw_instance *inst; | |
6575 | ||
6576 | hmap_init(&hmap); | |
6577 | for (inst = all_raw_instances; | |
6578 | inst < &all_raw_instances[ARRAY_SIZE(all_raw_instances)]; | |
6579 | inst++) { | |
6580 | hmap_insert(&hmap, &inst->decode_node, | |
6581 | ofpact_hdrs_hash(&inst->hdrs)); | |
6582 | } | |
6583 | ovsthread_once_done(&once); | |
6584 | } | |
6585 | return &hmap; | |
6586 | } | |
6587 | ||
6588 | static struct hmap * | |
6589 | ofpact_encode_hmap(void) | |
6590 | { | |
6591 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
6592 | static struct hmap hmap; | |
6593 | ||
6594 | if (ovsthread_once_start(&once)) { | |
6595 | struct ofpact_raw_instance *inst; | |
6596 | ||
6597 | hmap_init(&hmap); | |
6598 | for (inst = all_raw_instances; | |
6599 | inst < &all_raw_instances[ARRAY_SIZE(all_raw_instances)]; | |
6600 | inst++) { | |
6601 | hmap_insert(&hmap, &inst->encode_node, | |
6602 | hash_2words(inst->raw, inst->hdrs.ofp_version)); | |
6603 | } | |
6604 | ovsthread_once_done(&once); | |
6605 | } | |
6606 | return &hmap; | |
6607 | } | |
6608 | ||
6609 | static enum ofperr | |
6610 | ofpact_decode_raw(enum ofp_version ofp_version, | |
6611 | const struct ofp_action_header *oah, size_t length, | |
6612 | const struct ofpact_raw_instance **instp) | |
6613 | { | |
6614 | const struct ofpact_raw_instance *inst; | |
6615 | struct ofpact_hdrs hdrs; | |
6616 | ||
6617 | *instp = NULL; | |
6618 | if (length < sizeof *oah) { | |
6619 | return OFPERR_OFPBAC_BAD_LEN; | |
6620 | } | |
6621 | ||
6622 | /* Get base action type. */ | |
6623 | if (oah->type == htons(OFPAT_VENDOR)) { | |
6624 | /* Get vendor. */ | |
6625 | hdrs.vendor = ntohl(oah->vendor); | |
232c1e12 BP |
6626 | if (hdrs.vendor == NX_VENDOR_ID || hdrs.vendor == ONF_VENDOR_ID) { |
6627 | /* Get extension subtype. */ | |
6628 | const struct ext_action_header *nah; | |
c2d936a4 | 6629 | |
232c1e12 | 6630 | nah = ALIGNED_CAST(const struct ext_action_header *, oah); |
c2d936a4 BP |
6631 | if (length < sizeof *nah) { |
6632 | return OFPERR_OFPBAC_BAD_LEN; | |
6633 | } | |
6634 | hdrs.type = ntohs(nah->subtype); | |
6635 | } else { | |
6636 | VLOG_WARN_RL(&rl, "OpenFlow action has unknown vendor %#"PRIx32, | |
6637 | hdrs.vendor); | |
6638 | return OFPERR_OFPBAC_BAD_VENDOR; | |
6639 | } | |
6640 | } else { | |
6641 | hdrs.vendor = 0; | |
6642 | hdrs.type = ntohs(oah->type); | |
6643 | } | |
6644 | ||
6645 | hdrs.ofp_version = ofp_version; | |
6646 | HMAP_FOR_EACH_WITH_HASH (inst, decode_node, ofpact_hdrs_hash(&hdrs), | |
6647 | ofpact_decode_hmap()) { | |
6648 | if (ofpact_hdrs_equal(&hdrs, &inst->hdrs)) { | |
6649 | *instp = inst; | |
6650 | return 0; | |
6651 | } | |
6652 | } | |
6653 | ||
6654 | return (hdrs.vendor | |
6655 | ? OFPERR_OFPBAC_BAD_VENDOR_TYPE | |
6656 | : OFPERR_OFPBAC_BAD_TYPE); | |
6657 | } | |
6658 | ||
6659 | static enum ofperr | |
6660 | ofpact_pull_raw(struct ofpbuf *buf, enum ofp_version ofp_version, | |
6661 | enum ofp_raw_action_type *raw, uint64_t *arg) | |
6662 | { | |
6fd6ed71 | 6663 | const struct ofp_action_header *oah = buf->data; |
c2d936a4 BP |
6664 | const struct ofpact_raw_instance *action; |
6665 | unsigned int length; | |
6666 | enum ofperr error; | |
6667 | ||
6668 | *raw = *arg = 0; | |
6fd6ed71 | 6669 | error = ofpact_decode_raw(ofp_version, oah, buf->size, &action); |
c2d936a4 BP |
6670 | if (error) { |
6671 | return error; | |
6672 | } | |
6673 | ||
6674 | if (action->deprecation) { | |
6675 | VLOG_INFO_RL(&rl, "%s is deprecated in %s (%s)", | |
6676 | action->name, ofputil_version_to_string(ofp_version), | |
6677 | action->deprecation); | |
6678 | } | |
6679 | ||
6680 | length = ntohs(oah->len); | |
6fd6ed71 | 6681 | if (length > buf->size) { |
b153b990 | 6682 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u exceeds action buffer " |
6fd6ed71 | 6683 | "length %"PRIu32, action->name, length, buf->size); |
b153b990 BP |
6684 | return OFPERR_OFPBAC_BAD_LEN; |
6685 | } | |
c2d936a4 BP |
6686 | if (length < action->min_length || length > action->max_length) { |
6687 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u not in valid range " | |
6688 | "[%hu,%hu]", action->name, length, | |
6689 | action->min_length, action->max_length); | |
6690 | return OFPERR_OFPBAC_BAD_LEN; | |
6691 | } | |
6692 | if (length % 8) { | |
6693 | VLOG_WARN_RL(&rl, "OpenFlow action %s length %u is not a multiple " | |
6694 | "of 8", action->name, length); | |
6695 | return OFPERR_OFPBAC_BAD_LEN; | |
6696 | } | |
6697 | ||
6698 | *raw = action->raw; | |
6699 | *arg = 0; | |
6700 | if (action->arg_len) { | |
6701 | const uint8_t *p; | |
6702 | int i; | |
6703 | ||
6704 | p = ofpbuf_at_assert(buf, action->arg_ofs, action->arg_len); | |
6705 | for (i = 0; i < action->arg_len; i++) { | |
6706 | *arg = (*arg << 8) | p[i]; | |
6707 | } | |
6708 | } | |
6709 | ||
6710 | ofpbuf_pull(buf, length); | |
6711 | ||
6712 | return 0; | |
6713 | } | |
6714 | ||
6715 | static const struct ofpact_raw_instance * | |
6716 | ofpact_raw_lookup(enum ofp_version ofp_version, enum ofp_raw_action_type raw) | |
6717 | { | |
6718 | const struct ofpact_raw_instance *inst; | |
6719 | ||
6720 | HMAP_FOR_EACH_WITH_HASH (inst, encode_node, hash_2words(raw, ofp_version), | |
6721 | ofpact_encode_hmap()) { | |
6722 | if (inst->raw == raw && inst->hdrs.ofp_version == ofp_version) { | |
6723 | return inst; | |
6724 | } | |
6725 | } | |
6726 | OVS_NOT_REACHED(); | |
6727 | } | |
6728 | ||
6729 | static void * | |
6730 | ofpact_put_raw(struct ofpbuf *buf, enum ofp_version ofp_version, | |
6731 | enum ofp_raw_action_type raw, uint64_t arg) | |
6732 | { | |
6733 | const struct ofpact_raw_instance *inst; | |
6734 | struct ofp_action_header *oah; | |
6735 | const struct ofpact_hdrs *hdrs; | |
6736 | ||
6737 | inst = ofpact_raw_lookup(ofp_version, raw); | |
6738 | hdrs = &inst->hdrs; | |
6739 | ||
6740 | oah = ofpbuf_put_zeros(buf, inst->min_length); | |
6741 | oah->type = htons(hdrs->vendor ? OFPAT_VENDOR : hdrs->type); | |
6742 | oah->len = htons(inst->min_length); | |
6743 | oah->vendor = htonl(hdrs->vendor); | |
6744 | ||
6745 | switch (hdrs->vendor) { | |
6746 | case 0: | |
6747 | break; | |
6748 | ||
232c1e12 BP |
6749 | case NX_VENDOR_ID: |
6750 | case ONF_VENDOR_ID: { | |
6751 | struct ext_action_header *nah = (struct ext_action_header *) oah; | |
c2d936a4 BP |
6752 | nah->subtype = htons(hdrs->type); |
6753 | break; | |
6754 | } | |
6755 | ||
6756 | default: | |
6757 | OVS_NOT_REACHED(); | |
6758 | } | |
6759 | ||
6760 | if (inst->arg_len) { | |
6761 | uint8_t *p = (uint8_t *) oah + inst->arg_ofs + inst->arg_len; | |
6762 | int i; | |
6763 | ||
6764 | for (i = 0; i < inst->arg_len; i++) { | |
6765 | *--p = arg; | |
6766 | arg >>= 8; | |
6767 | } | |
6768 | } else { | |
6769 | ovs_assert(!arg); | |
6770 | } | |
6771 | ||
6772 | return oah; | |
6773 | } | |
178742f9 BP |
6774 | |
6775 | static void | |
6776 | pad_ofpat(struct ofpbuf *openflow, size_t start_ofs) | |
6777 | { | |
6778 | struct ofp_action_header *oah; | |
6779 | ||
6fd6ed71 | 6780 | ofpbuf_put_zeros(openflow, PAD_SIZE(openflow->size - start_ofs, 8)); |
178742f9 BP |
6781 | |
6782 | oah = ofpbuf_at_assert(openflow, start_ofs, sizeof *oah); | |
6fd6ed71 | 6783 | oah->len = htons(openflow->size - start_ofs); |
178742f9 BP |
6784 | } |
6785 |