2 * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 #include "ofp-actions.h"
21 #include "byte-order.h"
23 #include "dynamic-string.h"
25 #include "meta-flow.h"
26 #include "multipath.h"
32 VLOG_DEFINE_THIS_MODULE(ofp_actions);
34 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
36 /* Converting OpenFlow 1.0 to ofpacts. */
39 output_from_openflow10(const struct ofp10_action_output *oao,
42 struct ofpact_output *output;
44 output = ofpact_put_OUTPUT(out);
45 output->port = ntohs(oao->port);
46 output->max_len = ntohs(oao->max_len);
48 return ofputil_check_output_port(output->port, OFPP_MAX);
52 enqueue_from_openflow10(const struct ofp_action_enqueue *oae,
55 struct ofpact_enqueue *enqueue;
57 enqueue = ofpact_put_ENQUEUE(out);
58 enqueue->port = ntohs(oae->port);
59 enqueue->queue = ntohl(oae->queue_id);
60 if (enqueue->port >= OFPP_MAX && enqueue->port != OFPP_IN_PORT
61 && enqueue->port != OFPP_LOCAL) {
62 return OFPERR_OFPBAC_BAD_OUT_PORT;
68 resubmit_from_openflow(const struct nx_action_resubmit *nar,
71 struct ofpact_resubmit *resubmit;
73 resubmit = ofpact_put_RESUBMIT(out);
74 resubmit->ofpact.compat = OFPUTIL_NXAST_RESUBMIT;
75 resubmit->in_port = ntohs(nar->in_port);
76 resubmit->table_id = 0xff;
80 resubmit_table_from_openflow(const struct nx_action_resubmit *nar,
83 struct ofpact_resubmit *resubmit;
85 if (nar->pad[0] || nar->pad[1] || nar->pad[2]) {
86 return OFPERR_OFPBAC_BAD_ARGUMENT;
89 resubmit = ofpact_put_RESUBMIT(out);
90 resubmit->ofpact.compat = OFPUTIL_NXAST_RESUBMIT_TABLE;
91 resubmit->in_port = ntohs(nar->in_port);
92 resubmit->table_id = nar->table;
97 output_reg_from_openflow(const struct nx_action_output_reg *naor,
100 struct ofpact_output_reg *output_reg;
102 if (!is_all_zeros(naor->zero, sizeof naor->zero)) {
103 return OFPERR_OFPBAC_BAD_ARGUMENT;
106 output_reg = ofpact_put_OUTPUT_REG(out);
107 output_reg->src.field = mf_from_nxm_header(ntohl(naor->src));
108 output_reg->src.ofs = nxm_decode_ofs(naor->ofs_nbits);
109 output_reg->src.n_bits = nxm_decode_n_bits(naor->ofs_nbits);
110 output_reg->max_len = ntohs(naor->max_len);
112 return mf_check_src(&output_reg->src, NULL);
116 fin_timeout_from_openflow(const struct nx_action_fin_timeout *naft,
119 struct ofpact_fin_timeout *oft;
121 oft = ofpact_put_FIN_TIMEOUT(out);
122 oft->fin_idle_timeout = ntohs(naft->fin_idle_timeout);
123 oft->fin_hard_timeout = ntohs(naft->fin_hard_timeout);
127 controller_from_openflow(const struct nx_action_controller *nac,
130 struct ofpact_controller *oc;
132 oc = ofpact_put_CONTROLLER(out);
133 oc->max_len = ntohs(nac->max_len);
134 oc->controller_id = ntohs(nac->controller_id);
135 oc->reason = nac->reason;
139 note_from_openflow(const struct nx_action_note *nan, struct ofpbuf *out)
141 struct ofpact_note *note;
144 length = ntohs(nan->len) - offsetof(struct nx_action_note, note);
145 note = ofpact_put(out, OFPACT_NOTE,
146 offsetof(struct ofpact_note, data) + length);
147 note->length = length;
148 memcpy(note->data, nan->note, length);
152 dec_ttl_from_openflow(struct ofpbuf *out)
155 struct ofpact_cnt_ids *ids;
156 enum ofperr error = 0;
158 ids = ofpact_put_DEC_TTL(out);
159 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL;
160 ids->n_controllers = 1;
161 ofpbuf_put(out, &id, sizeof id);
163 ofpact_update_len(out, &ids->ofpact);
168 dec_ttl_cnt_ids_from_openflow(const struct nx_action_cnt_ids *nac_ids,
171 struct ofpact_cnt_ids *ids;
175 ids = ofpact_put_DEC_TTL(out);
176 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL_CNT_IDS;
177 ids->n_controllers = ntohs(nac_ids->n_controllers);
178 ids_size = ntohs(nac_ids->len) - sizeof *nac_ids;
180 if (!is_all_zeros(nac_ids->zeros, sizeof nac_ids->zeros)) {
181 return OFPERR_NXBRC_MUST_BE_ZERO;
184 if (ids_size < ids->n_controllers * sizeof(ovs_be16)) {
185 VLOG_WARN_RL(&rl, "Nicira action dec_ttl_cnt_ids only has %zu bytes "
186 "allocated for controller ids. %zu bytes are required for "
187 "%"PRIu16" controllers.", ids_size,
188 ids->n_controllers * sizeof(ovs_be16), ids->n_controllers);
189 return OFPERR_OFPBAC_BAD_LEN;
192 for (i = 0; i < ids->n_controllers; i++) {
193 uint16_t id = ntohs(((ovs_be16 *)(nac_ids + 1))[i]);
194 ofpbuf_put(out, &id, sizeof id);
198 ofpact_update_len(out, &ids->ofpact);
204 decode_nxast_action(const union ofp_action *a, enum ofputil_action_code *code)
206 const struct nx_action_header *nah = (const struct nx_action_header *) a;
207 uint16_t len = ntohs(a->header.len);
209 if (len < sizeof(struct nx_action_header)) {
210 return OFPERR_OFPBAC_BAD_LEN;
211 } else if (a->vendor.vendor != CONSTANT_HTONL(NX_VENDOR_ID)) {
212 return OFPERR_OFPBAC_BAD_VENDOR;
215 switch (nah->subtype) {
216 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
217 case CONSTANT_HTONS(ENUM): \
219 ? len >= sizeof(struct STRUCT) \
220 : len == sizeof(struct STRUCT)) { \
221 *code = OFPUTIL_##ENUM; \
224 return OFPERR_OFPBAC_BAD_LEN; \
227 #include "ofp-util.def"
229 case CONSTANT_HTONS(NXAST_SNAT__OBSOLETE):
230 case CONSTANT_HTONS(NXAST_DROP_SPOOFED_ARP__OBSOLETE):
232 return OFPERR_OFPBAC_BAD_TYPE;
236 /* Parses 'a' to determine its type. On success stores the correct type into
237 * '*code' and returns 0. On failure returns an OFPERR_* error code and
238 * '*code' is indeterminate.
240 * The caller must have already verified that 'a''s length is potentially
241 * correct (that is, a->header.len is nonzero and a multiple of sizeof(union
242 * ofp_action) and no longer than the amount of space allocated to 'a').
244 * This function verifies that 'a''s length is correct for the type of action
245 * that it represents. */
247 decode_openflow10_action(const union ofp_action *a,
248 enum ofputil_action_code *code)
251 case CONSTANT_HTONS(OFPAT10_VENDOR):
252 return decode_nxast_action(a, code);
254 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
255 case CONSTANT_HTONS(ENUM): \
256 if (a->header.len == htons(sizeof(struct STRUCT))) { \
257 *code = OFPUTIL_##ENUM; \
260 return OFPERR_OFPBAC_BAD_LEN; \
263 #include "ofp-util.def"
266 return OFPERR_OFPBAC_BAD_TYPE;
271 ofpact_from_nxast(const union ofp_action *a, enum ofputil_action_code code,
274 const struct nx_action_resubmit *nar;
275 const struct nx_action_set_tunnel *nast;
276 const struct nx_action_set_queue *nasq;
277 const struct nx_action_note *nan;
278 const struct nx_action_set_tunnel64 *nast64;
279 struct ofpact_tunnel *tunnel;
280 enum ofperr error = 0;
283 case OFPUTIL_ACTION_INVALID:
284 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
285 #define OFPAT11_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
286 #include "ofp-util.def"
289 case OFPUTIL_NXAST_RESUBMIT:
290 resubmit_from_openflow((const struct nx_action_resubmit *) a, out);
293 case OFPUTIL_NXAST_SET_TUNNEL:
294 nast = (const struct nx_action_set_tunnel *) a;
295 tunnel = ofpact_put_SET_TUNNEL(out);
296 tunnel->ofpact.compat = code;
297 tunnel->tun_id = ntohl(nast->tun_id);
300 case OFPUTIL_NXAST_SET_QUEUE:
301 nasq = (const struct nx_action_set_queue *) a;
302 ofpact_put_SET_QUEUE(out)->queue_id = ntohl(nasq->queue_id);
305 case OFPUTIL_NXAST_POP_QUEUE:
306 ofpact_put_POP_QUEUE(out);
309 case OFPUTIL_NXAST_REG_MOVE:
310 error = nxm_reg_move_from_openflow(
311 (const struct nx_action_reg_move *) a, out);
314 case OFPUTIL_NXAST_REG_LOAD:
315 error = nxm_reg_load_from_openflow(
316 (const struct nx_action_reg_load *) a, out);
319 case OFPUTIL_NXAST_NOTE:
320 nan = (const struct nx_action_note *) a;
321 note_from_openflow(nan, out);
324 case OFPUTIL_NXAST_SET_TUNNEL64:
325 nast64 = (const struct nx_action_set_tunnel64 *) a;
326 tunnel = ofpact_put_SET_TUNNEL(out);
327 tunnel->ofpact.compat = code;
328 tunnel->tun_id = ntohll(nast64->tun_id);
331 case OFPUTIL_NXAST_MULTIPATH:
332 error = multipath_from_openflow((const struct nx_action_multipath *) a,
333 ofpact_put_MULTIPATH(out));
336 case OFPUTIL_NXAST_AUTOPATH__DEPRECATED:
337 error = autopath_from_openflow((const struct nx_action_autopath *) a,
338 ofpact_put_AUTOPATH(out));
341 case OFPUTIL_NXAST_BUNDLE:
342 case OFPUTIL_NXAST_BUNDLE_LOAD:
343 error = bundle_from_openflow((const struct nx_action_bundle *) a, out);
346 case OFPUTIL_NXAST_OUTPUT_REG:
347 error = output_reg_from_openflow(
348 (const struct nx_action_output_reg *) a, out);
351 case OFPUTIL_NXAST_RESUBMIT_TABLE:
352 nar = (const struct nx_action_resubmit *) a;
353 error = resubmit_table_from_openflow(nar, out);
356 case OFPUTIL_NXAST_LEARN:
357 error = learn_from_openflow((const struct nx_action_learn *) a, out);
360 case OFPUTIL_NXAST_EXIT:
361 ofpact_put_EXIT(out);
364 case OFPUTIL_NXAST_DEC_TTL:
365 error = dec_ttl_from_openflow(out);
368 case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
369 error = dec_ttl_cnt_ids_from_openflow(
370 (const struct nx_action_cnt_ids *) a, out);
373 case OFPUTIL_NXAST_FIN_TIMEOUT:
374 fin_timeout_from_openflow(
375 (const struct nx_action_fin_timeout *) a, out);
378 case OFPUTIL_NXAST_CONTROLLER:
379 controller_from_openflow((const struct nx_action_controller *) a, out);
387 ofpact_from_openflow10(const union ofp_action *a, struct ofpbuf *out)
389 enum ofputil_action_code code;
392 error = decode_openflow10_action(a, &code);
398 case OFPUTIL_ACTION_INVALID:
399 #define OFPAT11_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
400 #include "ofp-util.def"
403 case OFPUTIL_OFPAT10_OUTPUT:
404 return output_from_openflow10(&a->output10, out);
406 case OFPUTIL_OFPAT10_SET_VLAN_VID:
407 if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
408 return OFPERR_OFPBAC_BAD_ARGUMENT;
410 ofpact_put_SET_VLAN_VID(out)->vlan_vid = ntohs(a->vlan_vid.vlan_vid);
413 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
414 if (a->vlan_pcp.vlan_pcp & ~7) {
415 return OFPERR_OFPBAC_BAD_ARGUMENT;
417 ofpact_put_SET_VLAN_PCP(out)->vlan_pcp = a->vlan_pcp.vlan_pcp;
420 case OFPUTIL_OFPAT10_STRIP_VLAN:
421 ofpact_put_STRIP_VLAN(out);
424 case OFPUTIL_OFPAT10_SET_DL_SRC:
425 memcpy(ofpact_put_SET_ETH_SRC(out)->mac,
426 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
429 case OFPUTIL_OFPAT10_SET_DL_DST:
430 memcpy(ofpact_put_SET_ETH_DST(out)->mac,
431 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
434 case OFPUTIL_OFPAT10_SET_NW_SRC:
435 ofpact_put_SET_IPV4_SRC(out)->ipv4 = a->nw_addr.nw_addr;
438 case OFPUTIL_OFPAT10_SET_NW_DST:
439 ofpact_put_SET_IPV4_DST(out)->ipv4 = a->nw_addr.nw_addr;
442 case OFPUTIL_OFPAT10_SET_NW_TOS:
443 if (a->nw_tos.nw_tos & ~IP_DSCP_MASK) {
444 return OFPERR_OFPBAC_BAD_ARGUMENT;
446 ofpact_put_SET_IPV4_DSCP(out)->dscp = a->nw_tos.nw_tos;
449 case OFPUTIL_OFPAT10_SET_TP_SRC:
450 ofpact_put_SET_L4_SRC_PORT(out)->port = ntohs(a->tp_port.tp_port);
453 case OFPUTIL_OFPAT10_SET_TP_DST:
454 ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(a->tp_port.tp_port);
458 case OFPUTIL_OFPAT10_ENQUEUE:
459 error = enqueue_from_openflow10((const struct ofp_action_enqueue *) a,
463 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
464 #include "ofp-util.def"
465 return ofpact_from_nxast(a, code, out);
471 static inline union ofp_action *
472 action_next(const union ofp_action *a)
474 return ((union ofp_action *) (void *)
475 ((uint8_t *) a + ntohs(a->header.len)));
479 action_is_valid(const union ofp_action *a, size_t n_actions)
481 uint16_t len = ntohs(a->header.len);
482 return (!(len % OFP_ACTION_ALIGN)
484 && len / sizeof *a <= n_actions);
487 /* This macro is careful to check for actions with bad lengths. */
488 #define ACTION_FOR_EACH(ITER, LEFT, ACTIONS, N_ACTIONS) \
489 for ((ITER) = (ACTIONS), (LEFT) = (N_ACTIONS); \
490 (LEFT) > 0 && action_is_valid(ITER, LEFT); \
491 ((LEFT) -= ntohs((ITER)->header.len) / sizeof(union ofp_action), \
492 (ITER) = action_next(ITER)))
495 log_bad_action(const union ofp_action *actions, size_t n_actions, size_t ofs,
498 if (!VLOG_DROP_WARN(&rl)) {
502 ds_put_hex_dump(&s, actions, n_actions * sizeof *actions, 0, false);
503 VLOG_WARN("bad action at offset %#zx (%s):\n%s",
504 ofs * sizeof *actions, ofperr_get_name(error), ds_cstr(&s));
510 ofpacts_from_openflow(const union ofp_action *in, size_t n_in,
512 enum ofperr (*ofpact_from_openflow)(
513 const union ofp_action *a, struct ofpbuf *out))
515 const union ofp_action *a;
518 ACTION_FOR_EACH (a, left, in, n_in) {
519 enum ofperr error = ofpact_from_openflow(a, out);
521 log_bad_action(in, n_in, a - in, error);
526 enum ofperr error = OFPERR_OFPBAC_BAD_LEN;
527 log_bad_action(in, n_in, n_in - left, error);
536 ofpacts_from_openflow10(const union ofp_action *in, size_t n_in,
539 return ofpacts_from_openflow(in, n_in, out, ofpact_from_openflow10);
543 ofpacts_pull_actions(struct ofpbuf *openflow, unsigned int actions_len,
544 struct ofpbuf *ofpacts,
545 enum ofperr (*translate)(const union ofp_action *actions,
547 struct ofpbuf *ofpacts))
549 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
550 const union ofp_action *actions;
553 ofpbuf_clear(ofpacts);
555 if (actions_len % OFP_ACTION_ALIGN != 0) {
556 VLOG_WARN_RL(&rl, "OpenFlow message actions length %u is not a "
557 "multiple of %d", actions_len, OFP_ACTION_ALIGN);
558 return OFPERR_OFPBRC_BAD_LEN;
561 actions = ofpbuf_try_pull(openflow, actions_len);
562 if (actions == NULL) {
563 VLOG_WARN_RL(&rl, "OpenFlow message actions length %u exceeds "
564 "remaining message length (%zu)",
565 actions_len, openflow->size);
566 return OFPERR_OFPBRC_BAD_LEN;
569 error = translate(actions, actions_len / OFP_ACTION_ALIGN, ofpacts);
571 ofpbuf_clear(ofpacts);
576 /* Attempts to convert 'actions_len' bytes of OpenFlow 1.0 actions from the
577 * front of 'openflow' into ofpacts. On success, replaces any existing content
578 * in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'.
579 * Returns 0 if successful, otherwise an OpenFlow error.
581 * The parsed actions are valid generically, but they may not be valid in a
582 * specific context. For example, port numbers up to OFPP_MAX are valid
583 * generically, but specific datapaths may only support port numbers in a
584 * smaller range. Use ofpacts_check() to additional check whether actions are
585 * valid in a specific context. */
587 ofpacts_pull_openflow10(struct ofpbuf *openflow, unsigned int actions_len,
588 struct ofpbuf *ofpacts)
590 return ofpacts_pull_actions(openflow, actions_len, ofpacts,
591 ofpacts_from_openflow10);
594 /* OpenFlow 1.1 actions. */
596 /* Parses 'a' to determine its type. On success stores the correct type into
597 * '*code' and returns 0. On failure returns an OFPERR_* error code and
598 * '*code' is indeterminate.
600 * The caller must have already verified that 'a''s length is potentially
601 * correct (that is, a->header.len is nonzero and a multiple of sizeof(union
602 * ofp_action) and no longer than the amount of space allocated to 'a').
604 * This function verifies that 'a''s length is correct for the type of action
605 * that it represents. */
607 decode_openflow11_action(const union ofp_action *a,
608 enum ofputil_action_code *code)
611 case CONSTANT_HTONS(OFPAT11_EXPERIMENTER):
612 return decode_nxast_action(a, code);
614 #define OFPAT11_ACTION(ENUM, STRUCT, NAME) \
615 case CONSTANT_HTONS(ENUM): \
616 if (a->header.len == htons(sizeof(struct STRUCT))) { \
617 *code = OFPUTIL_##ENUM; \
620 return OFPERR_OFPBAC_BAD_LEN; \
623 #include "ofp-util.def"
626 return OFPERR_OFPBAC_BAD_TYPE;
631 output_from_openflow11(const struct ofp11_action_output *oao,
634 struct ofpact_output *output;
637 output = ofpact_put_OUTPUT(out);
638 output->max_len = ntohs(oao->max_len);
640 error = ofputil_port_from_ofp11(oao->port, &output->port);
645 return ofputil_check_output_port(output->port, OFPP_MAX);
649 ofpact_from_openflow11(const union ofp_action *a, struct ofpbuf *out)
651 enum ofputil_action_code code;
654 error = decode_openflow11_action(a, &code);
660 case OFPUTIL_ACTION_INVALID:
661 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
662 #include "ofp-util.def"
665 case OFPUTIL_OFPAT11_OUTPUT:
666 return output_from_openflow11((const struct ofp11_action_output *) a,
669 case OFPUTIL_OFPAT11_SET_VLAN_VID:
670 if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
671 return OFPERR_OFPBAC_BAD_ARGUMENT;
673 ofpact_put_SET_VLAN_VID(out)->vlan_vid = ntohs(a->vlan_vid.vlan_vid);
676 case OFPUTIL_OFPAT11_SET_VLAN_PCP:
677 if (a->vlan_pcp.vlan_pcp & ~7) {
678 return OFPERR_OFPBAC_BAD_ARGUMENT;
680 ofpact_put_SET_VLAN_PCP(out)->vlan_pcp = a->vlan_pcp.vlan_pcp;
683 case OFPUTIL_OFPAT11_SET_DL_SRC:
684 memcpy(ofpact_put_SET_ETH_SRC(out)->mac,
685 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
688 case OFPUTIL_OFPAT11_SET_DL_DST:
689 memcpy(ofpact_put_SET_ETH_DST(out)->mac,
690 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
693 case OFPUTIL_OFPAT11_SET_NW_SRC:
694 ofpact_put_SET_IPV4_SRC(out)->ipv4 = a->nw_addr.nw_addr;
697 case OFPUTIL_OFPAT11_SET_NW_DST:
698 ofpact_put_SET_IPV4_DST(out)->ipv4 = a->nw_addr.nw_addr;
701 case OFPUTIL_OFPAT11_SET_NW_TOS:
702 if (a->nw_tos.nw_tos & ~IP_DSCP_MASK) {
703 return OFPERR_OFPBAC_BAD_ARGUMENT;
705 ofpact_put_SET_IPV4_DSCP(out)->dscp = a->nw_tos.nw_tos;
708 case OFPUTIL_OFPAT11_SET_TP_SRC:
709 ofpact_put_SET_L4_SRC_PORT(out)->port = ntohs(a->tp_port.tp_port);
712 case OFPUTIL_OFPAT11_SET_TP_DST:
713 ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(a->tp_port.tp_port);
716 case OFPUTIL_OFPAT12_SET_FIELD:
717 /* Not yet implemented. */
720 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
721 #include "ofp-util.def"
722 return ofpact_from_nxast(a, code, out);
729 ofpacts_from_openflow11(const union ofp_action *in, size_t n_in,
732 return ofpacts_from_openflow(in, n_in, out, ofpact_from_openflow11);
735 /* OpenFlow 1.1 instructions. */
737 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \
738 static inline const struct STRUCT * \
739 instruction_get_##ENUM(const struct ofp11_instruction *inst)\
741 assert(inst->type == htons(ENUM)); \
742 return (struct STRUCT *)inst; \
746 instruction_init_##ENUM(struct STRUCT *s) \
748 memset(s, 0, sizeof *s); \
749 s->type = htons(ENUM); \
750 s->len = htons(sizeof *s); \
753 static inline struct STRUCT * \
754 instruction_put_##ENUM(struct ofpbuf *buf) \
756 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
757 instruction_init_##ENUM(s); \
763 struct instruction_type_info {
764 enum ovs_instruction_type type;
768 static const struct instruction_type_info inst_info[] = {
769 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) {OVSINST_##ENUM, NAME},
775 ofpact_instruction_name_from_type(enum ovs_instruction_type type)
777 return inst_info[type].name;
781 ofpact_instruction_type_from_name(const char *name)
783 const struct instruction_type_info *p;
784 for (p = inst_info; p < &inst_info[ARRAY_SIZE(inst_info)]; p++) {
785 if (!strcasecmp(name, p->name)) {
792 static inline struct ofp11_instruction *
793 instruction_next(const struct ofp11_instruction *inst)
795 return ((struct ofp11_instruction *) (void *)
796 ((uint8_t *) inst + ntohs(inst->len)));
800 instruction_is_valid(const struct ofp11_instruction *inst,
801 size_t n_instructions)
803 uint16_t len = ntohs(inst->len);
804 return (!(len % OFP11_INSTRUCTION_ALIGN)
805 && len >= sizeof *inst
806 && len / sizeof *inst <= n_instructions);
809 /* This macro is careful to check for instructions with bad lengths. */
810 #define INSTRUCTION_FOR_EACH(ITER, LEFT, INSTRUCTIONS, N_INSTRUCTIONS) \
811 for ((ITER) = (INSTRUCTIONS), (LEFT) = (N_INSTRUCTIONS); \
812 (LEFT) > 0 && instruction_is_valid(ITER, LEFT); \
813 ((LEFT) -= (ntohs((ITER)->len) \
814 / sizeof(struct ofp11_instruction)), \
815 (ITER) = instruction_next(ITER)))
818 decode_openflow11_instruction(const struct ofp11_instruction *inst,
819 enum ovs_instruction_type *type)
821 uint16_t len = ntohs(inst->len);
823 switch (inst->type) {
824 case CONSTANT_HTONS(OFPIT11_EXPERIMENTER):
825 return OFPERR_OFPBIC_BAD_EXPERIMENTER;
827 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \
828 case CONSTANT_HTONS(ENUM): \
830 ? len >= sizeof(struct STRUCT) \
831 : len == sizeof(struct STRUCT)) { \
832 *type = OVSINST_##ENUM; \
835 return OFPERR_OFPBIC_BAD_LEN; \
841 return OFPERR_OFPBIC_UNKNOWN_INST;
846 decode_openflow11_instructions(const struct ofp11_instruction insts[],
848 const struct ofp11_instruction *out[])
850 const struct ofp11_instruction *inst;
853 memset(out, 0, N_OVS_INSTRUCTIONS * sizeof *out);
854 INSTRUCTION_FOR_EACH (inst, left, insts, n_insts) {
855 enum ovs_instruction_type type;
858 error = decode_openflow11_instruction(inst, &type);
864 return OFPERR_OFPIT_BAD_INSTRUCTION;
870 VLOG_WARN_RL(&rl, "bad instruction format at offset %zu",
871 (n_insts - left) * sizeof *inst);
872 return OFPERR_OFPBIC_BAD_LEN;
878 get_actions_from_instruction(const struct ofp11_instruction *inst,
879 const union ofp_action **actions,
882 *actions = (const union ofp_action *) (inst + 1);
883 *n_actions = (ntohs(inst->len) - sizeof *inst) / OFP11_INSTRUCTION_ALIGN;
886 /* Attempts to convert 'actions_len' bytes of OpenFlow 1.1 actions from the
887 * front of 'openflow' into ofpacts. On success, replaces any existing content
888 * in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'.
889 * Returns 0 if successful, otherwise an OpenFlow error.
891 * In most places in OpenFlow 1.1 and 1.2, actions appear encapsulated in
892 * instructions, so you should call ofpacts_pull_openflow11_instructions()
893 * instead of this function.
895 * The parsed actions are valid generically, but they may not be valid in a
896 * specific context. For example, port numbers up to OFPP_MAX are valid
897 * generically, but specific datapaths may only support port numbers in a
898 * smaller range. Use ofpacts_check() to additional check whether actions are
899 * valid in a specific context. */
901 ofpacts_pull_openflow11_actions(struct ofpbuf *openflow,
902 unsigned int actions_len,
903 struct ofpbuf *ofpacts)
905 return ofpacts_pull_actions(openflow, actions_len, ofpacts,
906 ofpacts_from_openflow11);
910 ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
911 unsigned int instructions_len,
912 struct ofpbuf *ofpacts)
914 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
915 const struct ofp11_instruction *instructions;
916 const struct ofp11_instruction *insts[N_OVS_INSTRUCTIONS];
919 ofpbuf_clear(ofpacts);
921 if (instructions_len % OFP11_INSTRUCTION_ALIGN != 0) {
922 VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u is not a "
924 instructions_len, OFP11_INSTRUCTION_ALIGN);
925 error = OFPERR_OFPBIC_BAD_LEN;
929 instructions = ofpbuf_try_pull(openflow, instructions_len);
930 if (instructions == NULL) {
931 VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u exceeds "
932 "remaining message length (%zu)",
933 instructions_len, openflow->size);
934 error = OFPERR_OFPBIC_BAD_LEN;
938 error = decode_openflow11_instructions(
939 instructions, instructions_len / OFP11_INSTRUCTION_ALIGN,
945 if (insts[OVSINST_OFPIT11_APPLY_ACTIONS]) {
946 const union ofp_action *actions;
949 get_actions_from_instruction(insts[OVSINST_OFPIT11_APPLY_ACTIONS],
950 &actions, &n_actions);
951 error = ofpacts_from_openflow11(actions, n_actions, ofpacts);
957 if (insts[OVSINST_OFPIT11_GOTO_TABLE] ||
958 insts[OVSINST_OFPIT11_WRITE_METADATA] ||
959 insts[OVSINST_OFPIT11_WRITE_ACTIONS] ||
960 insts[OVSINST_OFPIT11_CLEAR_ACTIONS]) {
961 error = OFPERR_OFPBIC_UNSUP_INST;
967 ofpbuf_clear(ofpacts);
973 ofpact_check__(const struct ofpact *a, const struct flow *flow, int max_ports)
975 const struct ofpact_enqueue *enqueue;
979 return ofputil_check_output_port(ofpact_get_OUTPUT(a)->port,
982 case OFPACT_CONTROLLER:
986 enqueue = ofpact_get_ENQUEUE(a);
987 if (enqueue->port >= max_ports && enqueue->port != OFPP_IN_PORT
988 && enqueue->port != OFPP_LOCAL) {
989 return OFPERR_OFPBAC_BAD_OUT_PORT;
993 case OFPACT_OUTPUT_REG:
994 return mf_check_src(&ofpact_get_OUTPUT_REG(a)->src, flow);
997 return bundle_check(ofpact_get_BUNDLE(a), max_ports, flow);
999 case OFPACT_SET_VLAN_VID:
1000 case OFPACT_SET_VLAN_PCP:
1001 case OFPACT_STRIP_VLAN:
1002 case OFPACT_SET_ETH_SRC:
1003 case OFPACT_SET_ETH_DST:
1004 case OFPACT_SET_IPV4_SRC:
1005 case OFPACT_SET_IPV4_DST:
1006 case OFPACT_SET_IPV4_DSCP:
1007 case OFPACT_SET_L4_SRC_PORT:
1008 case OFPACT_SET_L4_DST_PORT:
1011 case OFPACT_REG_MOVE:
1012 return nxm_reg_move_check(ofpact_get_REG_MOVE(a), flow);
1014 case OFPACT_REG_LOAD:
1015 return nxm_reg_load_check(ofpact_get_REG_LOAD(a), flow);
1017 case OFPACT_DEC_TTL:
1018 case OFPACT_SET_TUNNEL:
1019 case OFPACT_SET_QUEUE:
1020 case OFPACT_POP_QUEUE:
1021 case OFPACT_FIN_TIMEOUT:
1022 case OFPACT_RESUBMIT:
1026 return learn_check(ofpact_get_LEARN(a), flow);
1028 case OFPACT_MULTIPATH:
1029 return multipath_check(ofpact_get_MULTIPATH(a), flow);
1031 case OFPACT_AUTOPATH:
1032 return autopath_check(ofpact_get_AUTOPATH(a), flow);
1043 /* Checks that the 'ofpacts_len' bytes of actions in 'ofpacts' are
1044 * appropriate for a packet with the prerequisites satisfied by 'flow' in a
1045 * switch with no more than 'max_ports' ports. */
1047 ofpacts_check(const struct ofpact ofpacts[], size_t ofpacts_len,
1048 const struct flow *flow, int max_ports)
1050 const struct ofpact *a;
1052 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1053 enum ofperr error = ofpact_check__(a, flow, max_ports);
1062 /* Converting ofpacts to Nicira OpenFlow extensions. */
1065 ofpact_output_reg_to_nxast(const struct ofpact_output_reg *output_reg,
1068 struct nx_action_output_reg *naor = ofputil_put_NXAST_OUTPUT_REG(out);
1070 naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs,
1071 output_reg->src.n_bits);
1072 naor->src = htonl(output_reg->src.field->nxm_header);
1073 naor->max_len = htons(output_reg->max_len);
1077 ofpact_resubmit_to_nxast(const struct ofpact_resubmit *resubmit,
1080 struct nx_action_resubmit *nar;
1082 if (resubmit->table_id == 0xff
1083 && resubmit->ofpact.compat != OFPUTIL_NXAST_RESUBMIT_TABLE) {
1084 nar = ofputil_put_NXAST_RESUBMIT(out);
1086 nar = ofputil_put_NXAST_RESUBMIT_TABLE(out);
1087 nar->table = resubmit->table_id;
1089 nar->in_port = htons(resubmit->in_port);
1093 ofpact_set_tunnel_to_nxast(const struct ofpact_tunnel *tunnel,
1096 uint64_t tun_id = tunnel->tun_id;
1098 if (tun_id <= UINT32_MAX
1099 && tunnel->ofpact.compat != OFPUTIL_NXAST_SET_TUNNEL64) {
1100 ofputil_put_NXAST_SET_TUNNEL(out)->tun_id = htonl(tun_id);
1102 ofputil_put_NXAST_SET_TUNNEL64(out)->tun_id = htonll(tun_id);
1107 ofpact_note_to_nxast(const struct ofpact_note *note, struct ofpbuf *out)
1109 size_t start_ofs = out->size;
1110 struct nx_action_note *nan;
1111 unsigned int remainder;
1114 nan = ofputil_put_NXAST_NOTE(out);
1115 out->size -= sizeof nan->note;
1117 ofpbuf_put(out, note->data, note->length);
1119 len = out->size - start_ofs;
1120 remainder = len % OFP_ACTION_ALIGN;
1122 ofpbuf_put_zeros(out, OFP_ACTION_ALIGN - remainder);
1124 nan = (struct nx_action_note *)((char *)out->data + start_ofs);
1125 nan->len = htons(out->size - start_ofs);
1129 ofpact_controller_to_nxast(const struct ofpact_controller *oc,
1132 struct nx_action_controller *nac;
1134 nac = ofputil_put_NXAST_CONTROLLER(out);
1135 nac->max_len = htons(oc->max_len);
1136 nac->controller_id = htons(oc->controller_id);
1137 nac->reason = oc->reason;
1141 ofpact_dec_ttl_to_nxast(const struct ofpact_cnt_ids *oc_ids,
1144 if (oc_ids->ofpact.compat == OFPUTIL_NXAST_DEC_TTL) {
1145 ofputil_put_NXAST_DEC_TTL(out);
1147 struct nx_action_cnt_ids *nac_ids =
1148 ofputil_put_NXAST_DEC_TTL_CNT_IDS(out);
1149 int ids_len = ROUND_UP(2 * oc_ids->n_controllers, OFP_ACTION_ALIGN);
1153 nac_ids->len = htons(ntohs(nac_ids->len) + ids_len);
1154 nac_ids->n_controllers = htons(oc_ids->n_controllers);
1156 ids = ofpbuf_put_zeros(out, ids_len);
1157 for (i = 0; i < oc_ids->n_controllers; i++) {
1158 ids[i] = htons(oc_ids->cnt_ids[i]);
1164 ofpact_fin_timeout_to_nxast(const struct ofpact_fin_timeout *fin_timeout,
1167 struct nx_action_fin_timeout *naft = ofputil_put_NXAST_FIN_TIMEOUT(out);
1168 naft->fin_idle_timeout = htons(fin_timeout->fin_idle_timeout);
1169 naft->fin_hard_timeout = htons(fin_timeout->fin_hard_timeout);
1173 ofpact_to_nxast(const struct ofpact *a, struct ofpbuf *out)
1176 case OFPACT_CONTROLLER:
1177 ofpact_controller_to_nxast(ofpact_get_CONTROLLER(a), out);
1180 case OFPACT_OUTPUT_REG:
1181 ofpact_output_reg_to_nxast(ofpact_get_OUTPUT_REG(a), out);
1185 bundle_to_nxast(ofpact_get_BUNDLE(a), out);
1188 case OFPACT_REG_MOVE:
1189 nxm_reg_move_to_nxast(ofpact_get_REG_MOVE(a), out);
1192 case OFPACT_REG_LOAD:
1193 nxm_reg_load_to_nxast(ofpact_get_REG_LOAD(a), out);
1196 case OFPACT_DEC_TTL:
1197 ofpact_dec_ttl_to_nxast(ofpact_get_DEC_TTL(a), out);
1200 case OFPACT_SET_TUNNEL:
1201 ofpact_set_tunnel_to_nxast(ofpact_get_SET_TUNNEL(a), out);
1204 case OFPACT_SET_QUEUE:
1205 ofputil_put_NXAST_SET_QUEUE(out)->queue_id
1206 = htonl(ofpact_get_SET_QUEUE(a)->queue_id);
1209 case OFPACT_POP_QUEUE:
1210 ofputil_put_NXAST_POP_QUEUE(out);
1213 case OFPACT_FIN_TIMEOUT:
1214 ofpact_fin_timeout_to_nxast(ofpact_get_FIN_TIMEOUT(a), out);
1217 case OFPACT_RESUBMIT:
1218 ofpact_resubmit_to_nxast(ofpact_get_RESUBMIT(a), out);
1222 learn_to_nxast(ofpact_get_LEARN(a), out);
1225 case OFPACT_MULTIPATH:
1226 multipath_to_nxast(ofpact_get_MULTIPATH(a), out);
1229 case OFPACT_AUTOPATH:
1230 autopath_to_nxast(ofpact_get_AUTOPATH(a), out);
1234 ofpact_note_to_nxast(ofpact_get_NOTE(a), out);
1238 ofputil_put_NXAST_EXIT(out);
1242 case OFPACT_ENQUEUE:
1243 case OFPACT_SET_VLAN_VID:
1244 case OFPACT_SET_VLAN_PCP:
1245 case OFPACT_STRIP_VLAN:
1246 case OFPACT_SET_ETH_SRC:
1247 case OFPACT_SET_ETH_DST:
1248 case OFPACT_SET_IPV4_SRC:
1249 case OFPACT_SET_IPV4_DST:
1250 case OFPACT_SET_IPV4_DSCP:
1251 case OFPACT_SET_L4_SRC_PORT:
1252 case OFPACT_SET_L4_DST_PORT:
1257 /* Converting ofpacts to OpenFlow 1.0. */
1260 ofpact_output_to_openflow10(const struct ofpact_output *output,
1263 struct ofp10_action_output *oao;
1265 oao = ofputil_put_OFPAT10_OUTPUT(out);
1266 oao->port = htons(output->port);
1267 oao->max_len = htons(output->max_len);
1271 ofpact_enqueue_to_openflow10(const struct ofpact_enqueue *enqueue,
1274 struct ofp_action_enqueue *oae;
1276 oae = ofputil_put_OFPAT10_ENQUEUE(out);
1277 oae->port = htons(enqueue->port);
1278 oae->queue_id = htonl(enqueue->queue);
1282 ofpact_to_openflow10(const struct ofpact *a, struct ofpbuf *out)
1286 ofpact_output_to_openflow10(ofpact_get_OUTPUT(a), out);
1289 case OFPACT_ENQUEUE:
1290 ofpact_enqueue_to_openflow10(ofpact_get_ENQUEUE(a), out);
1293 case OFPACT_SET_VLAN_VID:
1294 ofputil_put_OFPAT10_SET_VLAN_VID(out)->vlan_vid
1295 = htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid);
1298 case OFPACT_SET_VLAN_PCP:
1299 ofputil_put_OFPAT10_SET_VLAN_PCP(out)->vlan_pcp
1300 = ofpact_get_SET_VLAN_PCP(a)->vlan_pcp;
1303 case OFPACT_STRIP_VLAN:
1304 ofputil_put_OFPAT10_STRIP_VLAN(out);
1307 case OFPACT_SET_ETH_SRC:
1308 memcpy(ofputil_put_OFPAT10_SET_DL_SRC(out)->dl_addr,
1309 ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
1312 case OFPACT_SET_ETH_DST:
1313 memcpy(ofputil_put_OFPAT10_SET_DL_DST(out)->dl_addr,
1314 ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
1317 case OFPACT_SET_IPV4_SRC:
1318 ofputil_put_OFPAT10_SET_NW_SRC(out)->nw_addr
1319 = ofpact_get_SET_IPV4_SRC(a)->ipv4;
1322 case OFPACT_SET_IPV4_DST:
1323 ofputil_put_OFPAT10_SET_NW_DST(out)->nw_addr
1324 = ofpact_get_SET_IPV4_DST(a)->ipv4;
1327 case OFPACT_SET_IPV4_DSCP:
1328 ofputil_put_OFPAT10_SET_NW_TOS(out)->nw_tos
1329 = ofpact_get_SET_IPV4_DSCP(a)->dscp;
1332 case OFPACT_SET_L4_SRC_PORT:
1333 ofputil_put_OFPAT10_SET_TP_SRC(out)->tp_port
1334 = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
1337 case OFPACT_SET_L4_DST_PORT:
1338 ofputil_put_OFPAT10_SET_TP_DST(out)->tp_port
1339 = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
1342 case OFPACT_CONTROLLER:
1343 case OFPACT_OUTPUT_REG:
1345 case OFPACT_REG_MOVE:
1346 case OFPACT_REG_LOAD:
1347 case OFPACT_DEC_TTL:
1348 case OFPACT_SET_TUNNEL:
1349 case OFPACT_SET_QUEUE:
1350 case OFPACT_POP_QUEUE:
1351 case OFPACT_FIN_TIMEOUT:
1352 case OFPACT_RESUBMIT:
1354 case OFPACT_MULTIPATH:
1355 case OFPACT_AUTOPATH:
1358 ofpact_to_nxast(a, out);
1363 /* Converts the 'ofpacts_len' bytes of ofpacts in 'ofpacts' into OpenFlow 1.0
1364 * actions in 'openflow', appending the actions to any existing data in
1367 ofpacts_put_openflow10(const struct ofpact ofpacts[], size_t ofpacts_len,
1368 struct ofpbuf *openflow)
1370 const struct ofpact *a;
1372 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1373 ofpact_to_openflow10(a, openflow);
1377 /* Converting ofpacts to OpenFlow 1.1. */
1380 ofpact_output_to_openflow11(const struct ofpact_output *output,
1383 struct ofp11_action_output *oao;
1385 oao = ofputil_put_OFPAT11_OUTPUT(out);
1386 oao->port = ofputil_port_to_ofp11(output->port);
1387 oao->max_len = htons(output->max_len);
1391 ofpact_to_openflow11(const struct ofpact *a, struct ofpbuf *out)
1395 return ofpact_output_to_openflow11(ofpact_get_OUTPUT(a), out);
1397 case OFPACT_ENQUEUE:
1401 case OFPACT_SET_VLAN_VID:
1402 ofputil_put_OFPAT11_SET_VLAN_VID(out)->vlan_vid
1403 = htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid);
1406 case OFPACT_SET_VLAN_PCP:
1407 ofputil_put_OFPAT11_SET_VLAN_PCP(out)->vlan_pcp
1408 = ofpact_get_SET_VLAN_PCP(a)->vlan_pcp;
1411 case OFPACT_STRIP_VLAN:
1415 case OFPACT_SET_ETH_SRC:
1416 memcpy(ofputil_put_OFPAT11_SET_DL_SRC(out)->dl_addr,
1417 ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
1420 case OFPACT_SET_ETH_DST:
1421 memcpy(ofputil_put_OFPAT11_SET_DL_DST(out)->dl_addr,
1422 ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
1425 case OFPACT_SET_IPV4_SRC:
1426 ofputil_put_OFPAT11_SET_NW_SRC(out)->nw_addr
1427 = ofpact_get_SET_IPV4_SRC(a)->ipv4;
1430 case OFPACT_SET_IPV4_DST:
1431 ofputil_put_OFPAT11_SET_NW_DST(out)->nw_addr
1432 = ofpact_get_SET_IPV4_DST(a)->ipv4;
1435 case OFPACT_SET_IPV4_DSCP:
1436 ofputil_put_OFPAT11_SET_NW_TOS(out)->nw_tos
1437 = ofpact_get_SET_IPV4_DSCP(a)->dscp;
1440 case OFPACT_SET_L4_SRC_PORT:
1441 ofputil_put_OFPAT11_SET_TP_SRC(out)->tp_port
1442 = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
1445 case OFPACT_SET_L4_DST_PORT:
1446 ofputil_put_OFPAT11_SET_TP_DST(out)->tp_port
1447 = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
1450 case OFPACT_CONTROLLER:
1451 case OFPACT_OUTPUT_REG:
1453 case OFPACT_REG_MOVE:
1454 case OFPACT_REG_LOAD:
1455 case OFPACT_DEC_TTL:
1456 case OFPACT_SET_TUNNEL:
1457 case OFPACT_SET_QUEUE:
1458 case OFPACT_POP_QUEUE:
1459 case OFPACT_FIN_TIMEOUT:
1460 case OFPACT_RESUBMIT:
1462 case OFPACT_MULTIPATH:
1463 case OFPACT_AUTOPATH:
1466 ofpact_to_nxast(a, out);
1471 /* Converts the ofpacts in 'ofpacts' (terminated by OFPACT_END) into OpenFlow
1472 * 1.1 actions in 'openflow', appending the actions to any existing data in
1475 ofpacts_put_openflow11_actions(const struct ofpact ofpacts[],
1476 size_t ofpacts_len, struct ofpbuf *openflow)
1478 const struct ofpact *a;
1479 size_t start_size = openflow->size;
1481 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1482 ofpact_to_openflow11(a, openflow);
1485 return openflow->size - start_size;
1489 ofpacts_put_openflow11_instructions(const struct ofpact ofpacts[],
1491 struct ofpbuf *openflow)
1493 struct ofp11_instruction_actions *oia;
1496 /* Put an OFPIT11_APPLY_ACTIONS instruction and fill it in. */
1497 ofs = openflow->size;
1498 instruction_put_OFPIT11_APPLY_ACTIONS(openflow);
1499 ofpacts_put_openflow11_actions(ofpacts, ofpacts_len, openflow);
1501 /* Update the instruction's length (or, if it's empty, delete it). */
1502 oia = ofpbuf_at_assert(openflow, ofs, sizeof *oia);
1503 if (openflow->size > ofs + sizeof *oia) {
1504 oia->len = htons(openflow->size - ofs);
1506 openflow->size = ofs;
1510 /* Returns true if 'action' outputs to 'port', false otherwise. */
1512 ofpact_outputs_to_port(const struct ofpact *ofpact, uint16_t port)
1514 switch (ofpact->type) {
1516 return ofpact_get_OUTPUT(ofpact)->port == port;
1517 case OFPACT_ENQUEUE:
1518 return ofpact_get_ENQUEUE(ofpact)->port == port;
1519 case OFPACT_CONTROLLER:
1520 return port == OFPP_CONTROLLER;
1522 case OFPACT_OUTPUT_REG:
1524 case OFPACT_SET_VLAN_VID:
1525 case OFPACT_SET_VLAN_PCP:
1526 case OFPACT_STRIP_VLAN:
1527 case OFPACT_SET_ETH_SRC:
1528 case OFPACT_SET_ETH_DST:
1529 case OFPACT_SET_IPV4_SRC:
1530 case OFPACT_SET_IPV4_DST:
1531 case OFPACT_SET_IPV4_DSCP:
1532 case OFPACT_SET_L4_SRC_PORT:
1533 case OFPACT_SET_L4_DST_PORT:
1534 case OFPACT_REG_MOVE:
1535 case OFPACT_REG_LOAD:
1536 case OFPACT_DEC_TTL:
1537 case OFPACT_SET_TUNNEL:
1538 case OFPACT_SET_QUEUE:
1539 case OFPACT_POP_QUEUE:
1540 case OFPACT_FIN_TIMEOUT:
1541 case OFPACT_RESUBMIT:
1543 case OFPACT_MULTIPATH:
1544 case OFPACT_AUTOPATH:
1552 /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs
1553 * to 'port', false otherwise. */
1555 ofpacts_output_to_port(const struct ofpact *ofpacts, size_t ofpacts_len,
1558 const struct ofpact *a;
1560 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1561 if (ofpact_outputs_to_port(a, port)) {
1570 ofpacts_equal(const struct ofpact *a, size_t a_len,
1571 const struct ofpact *b, size_t b_len)
1573 return a_len == b_len && !memcmp(a, b, a_len);
1576 /* Formatting ofpacts. */
1579 print_note(const struct ofpact_note *note, struct ds *string)
1583 ds_put_cstr(string, "note:");
1584 for (i = 0; i < note->length; i++) {
1586 ds_put_char(string, '.');
1588 ds_put_format(string, "%02"PRIx8, note->data[i]);
1593 print_dec_ttl(const struct ofpact_cnt_ids *ids,
1598 ds_put_cstr(s, "dec_ttl");
1599 if (ids->ofpact.compat == OFPUTIL_NXAST_DEC_TTL_CNT_IDS) {
1600 ds_put_cstr(s, "(");
1601 for (i = 0; i < ids->n_controllers; i++) {
1603 ds_put_cstr(s, ",");
1605 ds_put_format(s, "%"PRIu16, ids->cnt_ids[i]);
1607 ds_put_cstr(s, ")");
1612 print_fin_timeout(const struct ofpact_fin_timeout *fin_timeout,
1615 ds_put_cstr(s, "fin_timeout(");
1616 if (fin_timeout->fin_idle_timeout) {
1617 ds_put_format(s, "idle_timeout=%"PRIu16",",
1618 fin_timeout->fin_idle_timeout);
1620 if (fin_timeout->fin_hard_timeout) {
1621 ds_put_format(s, "hard_timeout=%"PRIu16",",
1622 fin_timeout->fin_hard_timeout);
1625 ds_put_char(s, ')');
1629 ofpact_format(const struct ofpact *a, struct ds *s)
1631 const struct ofpact_enqueue *enqueue;
1632 const struct ofpact_resubmit *resubmit;
1633 const struct ofpact_autopath *autopath;
1634 const struct ofpact_controller *controller;
1635 const struct ofpact_tunnel *tunnel;
1640 port = ofpact_get_OUTPUT(a)->port;
1641 if (port < OFPP_MAX) {
1642 ds_put_format(s, "output:%"PRIu16, port);
1644 ofputil_format_port(port, s);
1645 if (port == OFPP_CONTROLLER) {
1646 ds_put_format(s, ":%"PRIu16, ofpact_get_OUTPUT(a)->max_len);
1651 case OFPACT_CONTROLLER:
1652 controller = ofpact_get_CONTROLLER(a);
1653 if (controller->reason == OFPR_ACTION &&
1654 controller->controller_id == 0) {
1655 ds_put_format(s, "CONTROLLER:%"PRIu16,
1656 ofpact_get_CONTROLLER(a)->max_len);
1658 enum ofp_packet_in_reason reason = controller->reason;
1660 ds_put_cstr(s, "controller(");
1661 if (reason != OFPR_ACTION) {
1662 ds_put_format(s, "reason=%s,",
1663 ofputil_packet_in_reason_to_string(reason));
1665 if (controller->max_len != UINT16_MAX) {
1666 ds_put_format(s, "max_len=%"PRIu16",", controller->max_len);
1668 if (controller->controller_id != 0) {
1669 ds_put_format(s, "id=%"PRIu16",", controller->controller_id);
1672 ds_put_char(s, ')');
1676 case OFPACT_ENQUEUE:
1677 enqueue = ofpact_get_ENQUEUE(a);
1678 ds_put_format(s, "enqueue:");
1679 ofputil_format_port(enqueue->port, s);
1680 ds_put_format(s, "q%"PRIu32, enqueue->queue);
1683 case OFPACT_OUTPUT_REG:
1684 ds_put_cstr(s, "output:");
1685 mf_format_subfield(&ofpact_get_OUTPUT_REG(a)->src, s);
1689 bundle_format(ofpact_get_BUNDLE(a), s);
1692 case OFPACT_SET_VLAN_VID:
1693 ds_put_format(s, "mod_vlan_vid:%"PRIu16,
1694 ofpact_get_SET_VLAN_VID(a)->vlan_vid);
1697 case OFPACT_SET_VLAN_PCP:
1698 ds_put_format(s, "mod_vlan_pcp:%"PRIu8,
1699 ofpact_get_SET_VLAN_PCP(a)->vlan_pcp);
1702 case OFPACT_STRIP_VLAN:
1703 ds_put_cstr(s, "strip_vlan");
1706 case OFPACT_SET_ETH_SRC:
1707 ds_put_format(s, "mod_dl_src:"ETH_ADDR_FMT,
1708 ETH_ADDR_ARGS(ofpact_get_SET_ETH_SRC(a)->mac));
1711 case OFPACT_SET_ETH_DST:
1712 ds_put_format(s, "mod_dl_dst:"ETH_ADDR_FMT,
1713 ETH_ADDR_ARGS(ofpact_get_SET_ETH_DST(a)->mac));
1716 case OFPACT_SET_IPV4_SRC:
1717 ds_put_format(s, "mod_nw_src:"IP_FMT,
1718 IP_ARGS(&ofpact_get_SET_IPV4_SRC(a)->ipv4));
1721 case OFPACT_SET_IPV4_DST:
1722 ds_put_format(s, "mod_nw_dst:"IP_FMT,
1723 IP_ARGS(&ofpact_get_SET_IPV4_DST(a)->ipv4));
1726 case OFPACT_SET_IPV4_DSCP:
1727 ds_put_format(s, "mod_nw_tos:%d", ofpact_get_SET_IPV4_DSCP(a)->dscp);
1730 case OFPACT_SET_L4_SRC_PORT:
1731 ds_put_format(s, "mod_tp_src:%d", ofpact_get_SET_L4_SRC_PORT(a)->port);
1734 case OFPACT_SET_L4_DST_PORT:
1735 ds_put_format(s, "mod_tp_dst:%d", ofpact_get_SET_L4_DST_PORT(a)->port);
1738 case OFPACT_REG_MOVE:
1739 nxm_format_reg_move(ofpact_get_REG_MOVE(a), s);
1742 case OFPACT_REG_LOAD:
1743 nxm_format_reg_load(ofpact_get_REG_LOAD(a), s);
1746 case OFPACT_DEC_TTL:
1747 print_dec_ttl(ofpact_get_DEC_TTL(a), s);
1750 case OFPACT_SET_TUNNEL:
1751 tunnel = ofpact_get_SET_TUNNEL(a);
1752 ds_put_format(s, "set_tunnel%s:%#"PRIx64,
1753 (tunnel->tun_id > UINT32_MAX
1754 || a->compat == OFPUTIL_NXAST_SET_TUNNEL64 ? "64" : ""),
1758 case OFPACT_SET_QUEUE:
1759 ds_put_format(s, "set_queue:%"PRIu32,
1760 ofpact_get_SET_QUEUE(a)->queue_id);
1763 case OFPACT_POP_QUEUE:
1764 ds_put_cstr(s, "pop_queue");
1767 case OFPACT_FIN_TIMEOUT:
1768 print_fin_timeout(ofpact_get_FIN_TIMEOUT(a), s);
1771 case OFPACT_RESUBMIT:
1772 resubmit = ofpact_get_RESUBMIT(a);
1773 if (resubmit->in_port != OFPP_IN_PORT && resubmit->table_id == 255) {
1774 ds_put_cstr(s, "resubmit:");
1775 ofputil_format_port(resubmit->in_port, s);
1777 ds_put_format(s, "resubmit(");
1778 if (resubmit->in_port != OFPP_IN_PORT) {
1779 ofputil_format_port(resubmit->in_port, s);
1781 ds_put_char(s, ',');
1782 if (resubmit->table_id != 255) {
1783 ds_put_format(s, "%"PRIu8, resubmit->table_id);
1785 ds_put_char(s, ')');
1790 learn_format(ofpact_get_LEARN(a), s);
1793 case OFPACT_MULTIPATH:
1794 multipath_format(ofpact_get_MULTIPATH(a), s);
1797 case OFPACT_AUTOPATH:
1798 autopath = ofpact_get_AUTOPATH(a);
1799 ds_put_cstr(s, "autopath(");
1800 ofputil_format_port(autopath->port, s);
1801 ds_put_char(s, ',');
1802 mf_format_subfield(&autopath->dst, s);
1803 ds_put_char(s, ')');
1807 print_note(ofpact_get_NOTE(a), s);
1811 ds_put_cstr(s, "exit");
1816 /* Appends a string representing the 'ofpacts_len' bytes of ofpacts in
1817 * 'ofpacts' to 'string'. */
1819 ofpacts_format(const struct ofpact *ofpacts, size_t ofpacts_len,
1822 ds_put_cstr(string, "actions=");
1824 ds_put_cstr(string, "drop");
1826 const struct ofpact *a;
1828 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1830 ds_put_cstr(string, ",");
1832 ofpact_format(a, string);
1837 /* Internal use by helpers. */
1840 ofpact_put(struct ofpbuf *ofpacts, enum ofpact_type type, size_t len)
1842 struct ofpact *ofpact;
1844 ofpact_pad(ofpacts);
1845 ofpact = ofpacts->l2 = ofpbuf_put_uninit(ofpacts, len);
1846 ofpact_init(ofpact, type, len);
1851 ofpact_init(struct ofpact *ofpact, enum ofpact_type type, size_t len)
1853 memset(ofpact, 0, len);
1854 ofpact->type = type;
1855 ofpact->compat = OFPUTIL_ACTION_INVALID;
1859 /* Updates 'ofpact->len' to the number of bytes in the tail of 'ofpacts'
1860 * starting at 'ofpact'.
1862 * This is the correct way to update a variable-length ofpact's length after
1863 * adding the variable-length part of the payload. (See the large comment
1864 * near the end of ofp-actions.h for more information.) */
1866 ofpact_update_len(struct ofpbuf *ofpacts, struct ofpact *ofpact)
1868 assert(ofpact == ofpacts->l2);
1869 ofpact->len = (char *) ofpbuf_tail(ofpacts) - (char *) ofpact;
1872 /* Pads out 'ofpacts' to a multiple of OFPACT_ALIGNTO bytes in length. Each
1873 * ofpact_put_<ENUM>() calls this function automatically beforehand, but the
1874 * client must call this itself after adding the final ofpact to an array of
1877 * (The consequences of failing to call this function are probably not dire.
1878 * OFPACT_FOR_EACH will calculate a pointer beyond the end of the ofpacts, but
1879 * not dereference it. That's undefined behavior, technically, but it will not
1880 * cause a real problem on common systems. Still, it seems better to call
1883 ofpact_pad(struct ofpbuf *ofpacts)
1885 unsigned int rem = ofpacts->size % OFPACT_ALIGNTO;
1887 ofpbuf_put_zeros(ofpacts, OFPACT_ALIGNTO - rem);