2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 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"
20 #include "byte-order.h"
22 #include "dynamic-string.h"
24 #include "meta-flow.h"
25 #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 ofp10_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 metadata_from_nxast(const struct nx_action_write_metadata *nawm,
142 struct ofpact_metadata *om;
144 if (!is_all_zeros(nawm->zeros, sizeof nawm->zeros)) {
145 return OFPERR_NXBRC_MUST_BE_ZERO;
148 om = ofpact_put_WRITE_METADATA(out);
149 om->metadata = nawm->metadata;
150 om->mask = nawm->mask;
156 note_from_openflow(const struct nx_action_note *nan, struct ofpbuf *out)
158 struct ofpact_note *note;
161 length = ntohs(nan->len) - offsetof(struct nx_action_note, note);
162 note = ofpact_put(out, OFPACT_NOTE,
163 offsetof(struct ofpact_note, data) + length);
164 note->length = length;
165 memcpy(note->data, nan->note, length);
169 dec_ttl_from_openflow(struct ofpbuf *out, enum ofputil_action_code compat)
172 struct ofpact_cnt_ids *ids;
173 enum ofperr error = 0;
175 ids = ofpact_put_DEC_TTL(out);
176 ids->ofpact.compat = compat;
177 ids->n_controllers = 1;
178 ofpbuf_put(out, &id, sizeof id);
180 ofpact_update_len(out, &ids->ofpact);
185 dec_ttl_cnt_ids_from_openflow(const struct nx_action_cnt_ids *nac_ids,
188 struct ofpact_cnt_ids *ids;
192 ids = ofpact_put_DEC_TTL(out);
193 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL_CNT_IDS;
194 ids->n_controllers = ntohs(nac_ids->n_controllers);
195 ids_size = ntohs(nac_ids->len) - sizeof *nac_ids;
197 if (!is_all_zeros(nac_ids->zeros, sizeof nac_ids->zeros)) {
198 return OFPERR_NXBRC_MUST_BE_ZERO;
201 if (ids_size < ids->n_controllers * sizeof(ovs_be16)) {
202 VLOG_WARN_RL(&rl, "Nicira action dec_ttl_cnt_ids only has %zu bytes "
203 "allocated for controller ids. %zu bytes are required for "
204 "%"PRIu16" controllers.", ids_size,
205 ids->n_controllers * sizeof(ovs_be16), ids->n_controllers);
206 return OFPERR_OFPBAC_BAD_LEN;
209 for (i = 0; i < ids->n_controllers; i++) {
210 uint16_t id = ntohs(((ovs_be16 *)(nac_ids + 1))[i]);
211 ofpbuf_put(out, &id, sizeof id);
215 ofpact_update_len(out, &ids->ofpact);
221 decode_nxast_action(const union ofp_action *a, enum ofputil_action_code *code)
223 const struct nx_action_header *nah = (const struct nx_action_header *) a;
224 uint16_t len = ntohs(a->header.len);
226 if (len < sizeof(struct nx_action_header)) {
227 return OFPERR_OFPBAC_BAD_LEN;
228 } else if (a->vendor.vendor != CONSTANT_HTONL(NX_VENDOR_ID)) {
229 return OFPERR_OFPBAC_BAD_VENDOR;
232 switch (nah->subtype) {
233 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
234 case CONSTANT_HTONS(ENUM): \
236 ? len >= sizeof(struct STRUCT) \
237 : len == sizeof(struct STRUCT)) { \
238 *code = OFPUTIL_##ENUM; \
241 return OFPERR_OFPBAC_BAD_LEN; \
244 #include "ofp-util.def"
246 case CONSTANT_HTONS(NXAST_SNAT__OBSOLETE):
247 case CONSTANT_HTONS(NXAST_DROP_SPOOFED_ARP__OBSOLETE):
249 return OFPERR_OFPBAC_BAD_TYPE;
253 /* Parses 'a' to determine its type. On success stores the correct type into
254 * '*code' and returns 0. On failure returns an OFPERR_* error code and
255 * '*code' is indeterminate.
257 * The caller must have already verified that 'a''s length is potentially
258 * correct (that is, a->header.len is nonzero and a multiple of sizeof(union
259 * ofp_action) and no longer than the amount of space allocated to 'a').
261 * This function verifies that 'a''s length is correct for the type of action
262 * that it represents. */
264 decode_openflow10_action(const union ofp_action *a,
265 enum ofputil_action_code *code)
268 case CONSTANT_HTONS(OFPAT10_VENDOR):
269 return decode_nxast_action(a, code);
271 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
272 case CONSTANT_HTONS(ENUM): \
273 if (a->header.len == htons(sizeof(struct STRUCT))) { \
274 *code = OFPUTIL_##ENUM; \
277 return OFPERR_OFPBAC_BAD_LEN; \
280 #include "ofp-util.def"
283 return OFPERR_OFPBAC_BAD_TYPE;
288 ofpact_from_nxast(const union ofp_action *a, enum ofputil_action_code code,
291 const struct nx_action_resubmit *nar;
292 const struct nx_action_set_tunnel *nast;
293 const struct nx_action_set_queue *nasq;
294 const struct nx_action_note *nan;
295 const struct nx_action_set_tunnel64 *nast64;
296 const struct nx_action_write_metadata *nawm;
297 struct ofpact_tunnel *tunnel;
298 enum ofperr error = 0;
301 case OFPUTIL_ACTION_INVALID:
302 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
303 #define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
304 #include "ofp-util.def"
307 case OFPUTIL_NXAST_RESUBMIT:
308 resubmit_from_openflow((const struct nx_action_resubmit *) a, out);
311 case OFPUTIL_NXAST_SET_TUNNEL:
312 nast = (const struct nx_action_set_tunnel *) a;
313 tunnel = ofpact_put_SET_TUNNEL(out);
314 tunnel->ofpact.compat = code;
315 tunnel->tun_id = ntohl(nast->tun_id);
318 case OFPUTIL_NXAST_WRITE_METADATA:
319 nawm = (const struct nx_action_write_metadata *) a;
320 error = metadata_from_nxast(nawm, out);
323 case OFPUTIL_NXAST_SET_QUEUE:
324 nasq = (const struct nx_action_set_queue *) a;
325 ofpact_put_SET_QUEUE(out)->queue_id = ntohl(nasq->queue_id);
328 case OFPUTIL_NXAST_POP_QUEUE:
329 ofpact_put_POP_QUEUE(out);
332 case OFPUTIL_NXAST_REG_MOVE:
333 error = nxm_reg_move_from_openflow(
334 (const struct nx_action_reg_move *) a, out);
337 case OFPUTIL_NXAST_REG_LOAD:
338 error = nxm_reg_load_from_openflow(
339 (const struct nx_action_reg_load *) a, out);
342 case OFPUTIL_NXAST_NOTE:
343 nan = (const struct nx_action_note *) a;
344 note_from_openflow(nan, out);
347 case OFPUTIL_NXAST_SET_TUNNEL64:
348 nast64 = (const struct nx_action_set_tunnel64 *) a;
349 tunnel = ofpact_put_SET_TUNNEL(out);
350 tunnel->ofpact.compat = code;
351 tunnel->tun_id = ntohll(nast64->tun_id);
354 case OFPUTIL_NXAST_MULTIPATH:
355 error = multipath_from_openflow((const struct nx_action_multipath *) a,
356 ofpact_put_MULTIPATH(out));
359 case OFPUTIL_NXAST_BUNDLE:
360 case OFPUTIL_NXAST_BUNDLE_LOAD:
361 error = bundle_from_openflow((const struct nx_action_bundle *) a, out);
364 case OFPUTIL_NXAST_OUTPUT_REG:
365 error = output_reg_from_openflow(
366 (const struct nx_action_output_reg *) a, out);
369 case OFPUTIL_NXAST_RESUBMIT_TABLE:
370 nar = (const struct nx_action_resubmit *) a;
371 error = resubmit_table_from_openflow(nar, out);
374 case OFPUTIL_NXAST_LEARN:
375 error = learn_from_openflow((const struct nx_action_learn *) a, out);
378 case OFPUTIL_NXAST_EXIT:
379 ofpact_put_EXIT(out);
382 case OFPUTIL_NXAST_DEC_TTL:
383 error = dec_ttl_from_openflow(out, code);
386 case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
387 error = dec_ttl_cnt_ids_from_openflow(
388 (const struct nx_action_cnt_ids *) a, out);
391 case OFPUTIL_NXAST_FIN_TIMEOUT:
392 fin_timeout_from_openflow(
393 (const struct nx_action_fin_timeout *) a, out);
396 case OFPUTIL_NXAST_CONTROLLER:
397 controller_from_openflow((const struct nx_action_controller *) a, out);
400 case OFPUTIL_NXAST_PUSH_MPLS: {
401 struct nx_action_push_mpls *nxapm = (struct nx_action_push_mpls *)a;
402 if (!eth_type_mpls(nxapm->ethertype)) {
403 return OFPERR_OFPBAC_BAD_ARGUMENT;
405 ofpact_put_PUSH_MPLS(out)->ethertype = nxapm->ethertype;
409 case OFPUTIL_NXAST_POP_MPLS: {
410 struct nx_action_pop_mpls *nxapm = (struct nx_action_pop_mpls *)a;
411 if (eth_type_mpls(nxapm->ethertype)) {
412 return OFPERR_OFPBAC_BAD_ARGUMENT;
414 ofpact_put_POP_MPLS(out)->ethertype = nxapm->ethertype;
423 ofpact_from_openflow10(const union ofp_action *a, struct ofpbuf *out)
425 enum ofputil_action_code code;
428 error = decode_openflow10_action(a, &code);
434 case OFPUTIL_ACTION_INVALID:
435 #define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
436 #include "ofp-util.def"
439 case OFPUTIL_OFPAT10_OUTPUT:
440 return output_from_openflow10(&a->output10, out);
442 case OFPUTIL_OFPAT10_SET_VLAN_VID:
443 if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
444 return OFPERR_OFPBAC_BAD_ARGUMENT;
446 ofpact_put_SET_VLAN_VID(out)->vlan_vid = ntohs(a->vlan_vid.vlan_vid);
449 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
450 if (a->vlan_pcp.vlan_pcp & ~7) {
451 return OFPERR_OFPBAC_BAD_ARGUMENT;
453 ofpact_put_SET_VLAN_PCP(out)->vlan_pcp = a->vlan_pcp.vlan_pcp;
456 case OFPUTIL_OFPAT10_STRIP_VLAN:
457 ofpact_put_STRIP_VLAN(out);
460 case OFPUTIL_OFPAT10_SET_DL_SRC:
461 memcpy(ofpact_put_SET_ETH_SRC(out)->mac,
462 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
465 case OFPUTIL_OFPAT10_SET_DL_DST:
466 memcpy(ofpact_put_SET_ETH_DST(out)->mac,
467 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
470 case OFPUTIL_OFPAT10_SET_NW_SRC:
471 ofpact_put_SET_IPV4_SRC(out)->ipv4 = a->nw_addr.nw_addr;
474 case OFPUTIL_OFPAT10_SET_NW_DST:
475 ofpact_put_SET_IPV4_DST(out)->ipv4 = a->nw_addr.nw_addr;
478 case OFPUTIL_OFPAT10_SET_NW_TOS:
479 if (a->nw_tos.nw_tos & ~IP_DSCP_MASK) {
480 return OFPERR_OFPBAC_BAD_ARGUMENT;
482 ofpact_put_SET_IPV4_DSCP(out)->dscp = a->nw_tos.nw_tos;
485 case OFPUTIL_OFPAT10_SET_TP_SRC:
486 ofpact_put_SET_L4_SRC_PORT(out)->port = ntohs(a->tp_port.tp_port);
489 case OFPUTIL_OFPAT10_SET_TP_DST:
490 ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(a->tp_port.tp_port);
494 case OFPUTIL_OFPAT10_ENQUEUE:
495 error = enqueue_from_openflow10((const struct ofp10_action_enqueue *) a,
499 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
500 #include "ofp-util.def"
501 return ofpact_from_nxast(a, code, out);
507 static inline union ofp_action *
508 action_next(const union ofp_action *a)
510 return ((union ofp_action *) (void *)
511 ((uint8_t *) a + ntohs(a->header.len)));
515 action_is_valid(const union ofp_action *a, size_t n_actions)
517 uint16_t len = ntohs(a->header.len);
518 return (!(len % OFP_ACTION_ALIGN)
520 && len / sizeof *a <= n_actions);
523 /* This macro is careful to check for actions with bad lengths. */
524 #define ACTION_FOR_EACH(ITER, LEFT, ACTIONS, N_ACTIONS) \
525 for ((ITER) = (ACTIONS), (LEFT) = (N_ACTIONS); \
526 (LEFT) > 0 && action_is_valid(ITER, LEFT); \
527 ((LEFT) -= ntohs((ITER)->header.len) / sizeof(union ofp_action), \
528 (ITER) = action_next(ITER)))
531 log_bad_action(const union ofp_action *actions, size_t n_actions, size_t ofs,
534 if (!VLOG_DROP_WARN(&rl)) {
538 ds_put_hex_dump(&s, actions, n_actions * sizeof *actions, 0, false);
539 VLOG_WARN("bad action at offset %#zx (%s):\n%s",
540 ofs * sizeof *actions, ofperr_get_name(error), ds_cstr(&s));
546 ofpacts_from_openflow(const union ofp_action *in, size_t n_in,
548 enum ofperr (*ofpact_from_openflow)(
549 const union ofp_action *a, struct ofpbuf *out))
551 const union ofp_action *a;
554 ACTION_FOR_EACH (a, left, in, n_in) {
555 enum ofperr error = ofpact_from_openflow(a, out);
557 log_bad_action(in, n_in, a - in, error);
562 enum ofperr error = OFPERR_OFPBAC_BAD_LEN;
563 log_bad_action(in, n_in, n_in - left, error);
572 ofpacts_from_openflow10(const union ofp_action *in, size_t n_in,
575 return ofpacts_from_openflow(in, n_in, out, ofpact_from_openflow10);
579 ofpacts_pull_actions(struct ofpbuf *openflow, unsigned int actions_len,
580 struct ofpbuf *ofpacts,
581 enum ofperr (*translate)(const union ofp_action *actions,
583 struct ofpbuf *ofpacts))
585 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
586 const union ofp_action *actions;
589 ofpbuf_clear(ofpacts);
591 if (actions_len % OFP_ACTION_ALIGN != 0) {
592 VLOG_WARN_RL(&rl, "OpenFlow message actions length %u is not a "
593 "multiple of %d", actions_len, OFP_ACTION_ALIGN);
594 return OFPERR_OFPBRC_BAD_LEN;
597 actions = ofpbuf_try_pull(openflow, actions_len);
598 if (actions == NULL) {
599 VLOG_WARN_RL(&rl, "OpenFlow message actions length %u exceeds "
600 "remaining message length (%zu)",
601 actions_len, openflow->size);
602 return OFPERR_OFPBRC_BAD_LEN;
605 error = translate(actions, actions_len / OFP_ACTION_ALIGN, ofpacts);
607 ofpbuf_clear(ofpacts);
611 error = ofpacts_verify(ofpacts->data, ofpacts->size);
613 ofpbuf_clear(ofpacts);
618 /* Attempts to convert 'actions_len' bytes of OpenFlow 1.0 actions from the
619 * front of 'openflow' into ofpacts. On success, replaces any existing content
620 * in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'.
621 * Returns 0 if successful, otherwise an OpenFlow error.
623 * The parsed actions are valid generically, but they may not be valid in a
624 * specific context. For example, port numbers up to OFPP_MAX are valid
625 * generically, but specific datapaths may only support port numbers in a
626 * smaller range. Use ofpacts_check() to additional check whether actions are
627 * valid in a specific context. */
629 ofpacts_pull_openflow10(struct ofpbuf *openflow, unsigned int actions_len,
630 struct ofpbuf *ofpacts)
632 return ofpacts_pull_actions(openflow, actions_len, ofpacts,
633 ofpacts_from_openflow10);
636 /* OpenFlow 1.1 actions. */
638 /* Parses 'a' to determine its type. On success stores the correct type into
639 * '*code' and returns 0. On failure returns an OFPERR_* error code and
640 * '*code' is indeterminate.
642 * The caller must have already verified that 'a''s length is potentially
643 * correct (that is, a->header.len is nonzero and a multiple of sizeof(union
644 * ofp_action) and no longer than the amount of space allocated to 'a').
646 * This function verifies that 'a''s length is correct for the type of action
647 * that it represents. */
649 decode_openflow11_action(const union ofp_action *a,
650 enum ofputil_action_code *code)
655 case CONSTANT_HTONS(OFPAT11_EXPERIMENTER):
656 return decode_nxast_action(a, code);
658 #define OFPAT11_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
659 case CONSTANT_HTONS(ENUM): \
660 len = ntohs(a->header.len); \
662 ? len >= sizeof(struct STRUCT) \
663 : len == sizeof(struct STRUCT)) { \
664 *code = OFPUTIL_##ENUM; \
667 return OFPERR_OFPBAC_BAD_LEN; \
670 #include "ofp-util.def"
673 return OFPERR_OFPBAC_BAD_TYPE;
678 output_from_openflow11(const struct ofp11_action_output *oao,
681 struct ofpact_output *output;
684 output = ofpact_put_OUTPUT(out);
685 output->max_len = ntohs(oao->max_len);
687 error = ofputil_port_from_ofp11(oao->port, &output->port);
692 return ofputil_check_output_port(output->port, OFPP_MAX);
696 ofpact_from_openflow11(const union ofp_action *a, struct ofpbuf *out)
698 enum ofputil_action_code code;
701 error = decode_openflow11_action(a, &code);
707 case OFPUTIL_ACTION_INVALID:
708 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) case OFPUTIL_##ENUM:
709 #include "ofp-util.def"
712 case OFPUTIL_OFPAT11_OUTPUT:
713 return output_from_openflow11((const struct ofp11_action_output *) a,
716 case OFPUTIL_OFPAT11_SET_VLAN_VID:
717 if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
718 return OFPERR_OFPBAC_BAD_ARGUMENT;
720 ofpact_put_SET_VLAN_VID(out)->vlan_vid = ntohs(a->vlan_vid.vlan_vid);
723 case OFPUTIL_OFPAT11_SET_VLAN_PCP:
724 if (a->vlan_pcp.vlan_pcp & ~7) {
725 return OFPERR_OFPBAC_BAD_ARGUMENT;
727 ofpact_put_SET_VLAN_PCP(out)->vlan_pcp = a->vlan_pcp.vlan_pcp;
730 case OFPUTIL_OFPAT11_PUSH_VLAN:
731 if (((const struct ofp11_action_push *)a)->ethertype !=
732 htons(ETH_TYPE_VLAN_8021Q)) {
733 /* XXX 802.1AD(QinQ) isn't supported at the moment */
734 return OFPERR_OFPBAC_BAD_ARGUMENT;
736 ofpact_put_PUSH_VLAN(out);
739 case OFPUTIL_OFPAT11_POP_VLAN:
740 ofpact_put_STRIP_VLAN(out);
743 case OFPUTIL_OFPAT11_SET_QUEUE:
744 ofpact_put_SET_QUEUE(out)->queue_id =
745 ntohl(((const struct ofp11_action_set_queue *)a)->queue_id);
748 case OFPUTIL_OFPAT11_SET_DL_SRC:
749 memcpy(ofpact_put_SET_ETH_SRC(out)->mac,
750 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
753 case OFPUTIL_OFPAT11_SET_DL_DST:
754 memcpy(ofpact_put_SET_ETH_DST(out)->mac,
755 ((const struct ofp_action_dl_addr *) a)->dl_addr, ETH_ADDR_LEN);
758 case OFPUTIL_OFPAT11_DEC_NW_TTL:
759 dec_ttl_from_openflow(out, code);
762 case OFPUTIL_OFPAT11_SET_NW_SRC:
763 ofpact_put_SET_IPV4_SRC(out)->ipv4 = a->nw_addr.nw_addr;
766 case OFPUTIL_OFPAT11_SET_NW_DST:
767 ofpact_put_SET_IPV4_DST(out)->ipv4 = a->nw_addr.nw_addr;
770 case OFPUTIL_OFPAT11_SET_NW_TOS:
771 if (a->nw_tos.nw_tos & ~IP_DSCP_MASK) {
772 return OFPERR_OFPBAC_BAD_ARGUMENT;
774 ofpact_put_SET_IPV4_DSCP(out)->dscp = a->nw_tos.nw_tos;
777 case OFPUTIL_OFPAT11_SET_TP_SRC:
778 ofpact_put_SET_L4_SRC_PORT(out)->port = ntohs(a->tp_port.tp_port);
781 case OFPUTIL_OFPAT11_SET_TP_DST:
782 ofpact_put_SET_L4_DST_PORT(out)->port = ntohs(a->tp_port.tp_port);
785 case OFPUTIL_OFPAT12_SET_FIELD:
786 return nxm_reg_load_from_openflow12_set_field(
787 (const struct ofp12_action_set_field *)a, out);
789 case OFPUTIL_OFPAT11_PUSH_MPLS: {
790 struct ofp11_action_push *oap = (struct ofp11_action_push *)a;
791 if (!eth_type_mpls(oap->ethertype)) {
792 return OFPERR_OFPBAC_BAD_ARGUMENT;
794 ofpact_put_PUSH_MPLS(out)->ethertype = oap->ethertype;
798 case OFPUTIL_OFPAT11_POP_MPLS: {
799 struct ofp11_action_pop_mpls *oapm = (struct ofp11_action_pop_mpls *)a;
800 if (eth_type_mpls(oapm->ethertype)) {
801 return OFPERR_OFPBAC_BAD_ARGUMENT;
803 ofpact_put_POP_MPLS(out)->ethertype = oapm->ethertype;
807 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) case OFPUTIL_##ENUM:
808 #include "ofp-util.def"
809 return ofpact_from_nxast(a, code, out);
816 ofpacts_from_openflow11(const union ofp_action *in, size_t n_in,
819 return ofpacts_from_openflow(in, n_in, out, ofpact_from_openflow11);
822 /* OpenFlow 1.1 instructions. */
824 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \
825 static inline const struct STRUCT * \
826 instruction_get_##ENUM(const struct ofp11_instruction *inst)\
828 ovs_assert(inst->type == htons(ENUM)); \
829 return (struct STRUCT *)inst; \
833 instruction_init_##ENUM(struct STRUCT *s) \
835 memset(s, 0, sizeof *s); \
836 s->type = htons(ENUM); \
837 s->len = htons(sizeof *s); \
840 static inline struct STRUCT * \
841 instruction_put_##ENUM(struct ofpbuf *buf) \
843 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
844 instruction_init_##ENUM(s); \
850 struct instruction_type_info {
851 enum ovs_instruction_type type;
855 static const struct instruction_type_info inst_info[] = {
856 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) {OVSINST_##ENUM, NAME},
862 ofpact_instruction_name_from_type(enum ovs_instruction_type type)
864 return inst_info[type].name;
868 ofpact_instruction_type_from_name(const char *name)
870 const struct instruction_type_info *p;
871 for (p = inst_info; p < &inst_info[ARRAY_SIZE(inst_info)]; p++) {
872 if (!strcasecmp(name, p->name)) {
879 static inline struct ofp11_instruction *
880 instruction_next(const struct ofp11_instruction *inst)
882 return ((struct ofp11_instruction *) (void *)
883 ((uint8_t *) inst + ntohs(inst->len)));
887 instruction_is_valid(const struct ofp11_instruction *inst,
888 size_t n_instructions)
890 uint16_t len = ntohs(inst->len);
891 return (!(len % OFP11_INSTRUCTION_ALIGN)
892 && len >= sizeof *inst
893 && len / sizeof *inst <= n_instructions);
896 /* This macro is careful to check for instructions with bad lengths. */
897 #define INSTRUCTION_FOR_EACH(ITER, LEFT, INSTRUCTIONS, N_INSTRUCTIONS) \
898 for ((ITER) = (INSTRUCTIONS), (LEFT) = (N_INSTRUCTIONS); \
899 (LEFT) > 0 && instruction_is_valid(ITER, LEFT); \
900 ((LEFT) -= (ntohs((ITER)->len) \
901 / sizeof(struct ofp11_instruction)), \
902 (ITER) = instruction_next(ITER)))
905 decode_openflow11_instruction(const struct ofp11_instruction *inst,
906 enum ovs_instruction_type *type)
908 uint16_t len = ntohs(inst->len);
910 switch (inst->type) {
911 case CONSTANT_HTONS(OFPIT11_EXPERIMENTER):
912 return OFPERR_OFPBIC_BAD_EXPERIMENTER;
914 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \
915 case CONSTANT_HTONS(ENUM): \
917 ? len >= sizeof(struct STRUCT) \
918 : len == sizeof(struct STRUCT)) { \
919 *type = OVSINST_##ENUM; \
922 return OFPERR_OFPBIC_BAD_LEN; \
928 return OFPERR_OFPBIC_UNKNOWN_INST;
933 decode_openflow11_instructions(const struct ofp11_instruction insts[],
935 const struct ofp11_instruction *out[])
937 const struct ofp11_instruction *inst;
940 memset(out, 0, N_OVS_INSTRUCTIONS * sizeof *out);
941 INSTRUCTION_FOR_EACH (inst, left, insts, n_insts) {
942 enum ovs_instruction_type type;
945 error = decode_openflow11_instruction(inst, &type);
951 return OFPERR_OFPBAC_UNSUPPORTED_ORDER; /* No specific code for
952 * a duplicate instruction
959 VLOG_WARN_RL(&rl, "bad instruction format at offset %zu",
960 (n_insts - left) * sizeof *inst);
961 return OFPERR_OFPBIC_BAD_LEN;
967 get_actions_from_instruction(const struct ofp11_instruction *inst,
968 const union ofp_action **actions,
971 *actions = (const union ofp_action *) (inst + 1);
972 *n_actions = (ntohs(inst->len) - sizeof *inst) / OFP11_INSTRUCTION_ALIGN;
975 /* Attempts to convert 'actions_len' bytes of OpenFlow 1.1 actions from the
976 * front of 'openflow' into ofpacts. On success, replaces any existing content
977 * in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'.
978 * Returns 0 if successful, otherwise an OpenFlow error.
980 * In most places in OpenFlow 1.1 and 1.2, actions appear encapsulated in
981 * instructions, so you should call ofpacts_pull_openflow11_instructions()
982 * instead of this function.
984 * The parsed actions are valid generically, but they may not be valid in a
985 * specific context. For example, port numbers up to OFPP_MAX are valid
986 * generically, but specific datapaths may only support port numbers in a
987 * smaller range. Use ofpacts_check() to additional check whether actions are
988 * valid in a specific context. */
990 ofpacts_pull_openflow11_actions(struct ofpbuf *openflow,
991 unsigned int actions_len,
992 struct ofpbuf *ofpacts)
994 return ofpacts_pull_actions(openflow, actions_len, ofpacts,
995 ofpacts_from_openflow11);
999 ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
1000 unsigned int instructions_len,
1001 struct ofpbuf *ofpacts)
1003 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1004 const struct ofp11_instruction *instructions;
1005 const struct ofp11_instruction *insts[N_OVS_INSTRUCTIONS];
1008 ofpbuf_clear(ofpacts);
1010 if (instructions_len % OFP11_INSTRUCTION_ALIGN != 0) {
1011 VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u is not a "
1013 instructions_len, OFP11_INSTRUCTION_ALIGN);
1014 error = OFPERR_OFPBIC_BAD_LEN;
1018 instructions = ofpbuf_try_pull(openflow, instructions_len);
1019 if (instructions == NULL) {
1020 VLOG_WARN_RL(&rl, "OpenFlow message instructions length %u exceeds "
1021 "remaining message length (%zu)",
1022 instructions_len, openflow->size);
1023 error = OFPERR_OFPBIC_BAD_LEN;
1027 error = decode_openflow11_instructions(
1028 instructions, instructions_len / OFP11_INSTRUCTION_ALIGN,
1034 if (insts[OVSINST_OFPIT11_APPLY_ACTIONS]) {
1035 const union ofp_action *actions;
1038 get_actions_from_instruction(insts[OVSINST_OFPIT11_APPLY_ACTIONS],
1039 &actions, &n_actions);
1040 error = ofpacts_from_openflow11(actions, n_actions, ofpacts);
1045 if (insts[OVSINST_OFPIT11_CLEAR_ACTIONS]) {
1046 instruction_get_OFPIT11_CLEAR_ACTIONS(
1047 insts[OVSINST_OFPIT11_CLEAR_ACTIONS]);
1048 ofpact_put_CLEAR_ACTIONS(ofpacts);
1050 /* XXX Write-Actions */
1051 if (insts[OVSINST_OFPIT11_WRITE_METADATA]) {
1052 const struct ofp11_instruction_write_metadata *oiwm;
1053 struct ofpact_metadata *om;
1055 oiwm = (const struct ofp11_instruction_write_metadata *)
1056 insts[OVSINST_OFPIT11_WRITE_METADATA];
1058 om = ofpact_put_WRITE_METADATA(ofpacts);
1059 om->metadata = oiwm->metadata;
1060 om->mask = oiwm->metadata_mask;
1062 if (insts[OVSINST_OFPIT11_GOTO_TABLE]) {
1063 const struct ofp11_instruction_goto_table *oigt;
1064 struct ofpact_goto_table *ogt;
1066 oigt = instruction_get_OFPIT11_GOTO_TABLE(
1067 insts[OVSINST_OFPIT11_GOTO_TABLE]);
1068 ogt = ofpact_put_GOTO_TABLE(ofpacts);
1069 ogt->table_id = oigt->table_id;
1072 if (insts[OVSINST_OFPIT11_WRITE_ACTIONS]) {
1073 error = OFPERR_OFPBIC_UNSUP_INST;
1077 error = ofpacts_verify(ofpacts->data, ofpacts->size);
1080 ofpbuf_clear(ofpacts);
1086 ofpact_check__(const struct ofpact *a, const struct flow *flow, int max_ports,
1089 const struct ofpact_enqueue *enqueue;
1093 return ofputil_check_output_port(ofpact_get_OUTPUT(a)->port,
1096 case OFPACT_CONTROLLER:
1099 case OFPACT_ENQUEUE:
1100 enqueue = ofpact_get_ENQUEUE(a);
1101 if (enqueue->port >= max_ports && enqueue->port != OFPP_IN_PORT
1102 && enqueue->port != OFPP_LOCAL) {
1103 return OFPERR_OFPBAC_BAD_OUT_PORT;
1107 case OFPACT_OUTPUT_REG:
1108 return mf_check_src(&ofpact_get_OUTPUT_REG(a)->src, flow);
1111 return bundle_check(ofpact_get_BUNDLE(a), max_ports, flow);
1113 case OFPACT_SET_VLAN_VID:
1114 case OFPACT_SET_VLAN_PCP:
1115 case OFPACT_STRIP_VLAN:
1116 case OFPACT_PUSH_VLAN:
1117 case OFPACT_SET_ETH_SRC:
1118 case OFPACT_SET_ETH_DST:
1119 case OFPACT_SET_IPV4_SRC:
1120 case OFPACT_SET_IPV4_DST:
1121 case OFPACT_SET_IPV4_DSCP:
1122 case OFPACT_SET_L4_SRC_PORT:
1123 case OFPACT_SET_L4_DST_PORT:
1126 case OFPACT_REG_MOVE:
1127 return nxm_reg_move_check(ofpact_get_REG_MOVE(a), flow);
1129 case OFPACT_REG_LOAD:
1130 if (*dl_type != flow->dl_type) {
1131 struct flow updated_flow = *flow;
1132 updated_flow.dl_type = *dl_type;
1133 return nxm_reg_load_check(ofpact_get_REG_LOAD(a), &updated_flow);
1135 return nxm_reg_load_check(ofpact_get_REG_LOAD(a), flow);
1138 case OFPACT_DEC_TTL:
1139 case OFPACT_SET_TUNNEL:
1140 case OFPACT_SET_QUEUE:
1141 case OFPACT_POP_QUEUE:
1142 case OFPACT_FIN_TIMEOUT:
1143 case OFPACT_RESUBMIT:
1147 return learn_check(ofpact_get_LEARN(a), flow);
1149 case OFPACT_MULTIPATH:
1150 return multipath_check(ofpact_get_MULTIPATH(a), flow);
1156 case OFPACT_PUSH_MPLS:
1157 *dl_type = ofpact_get_PUSH_MPLS(a)->ethertype;
1160 case OFPACT_POP_MPLS:
1161 *dl_type = ofpact_get_POP_MPLS(a)->ethertype;
1164 case OFPACT_CLEAR_ACTIONS:
1165 case OFPACT_WRITE_METADATA:
1166 case OFPACT_GOTO_TABLE:
1174 /* Checks that the 'ofpacts_len' bytes of actions in 'ofpacts' are
1175 * appropriate for a packet with the prerequisites satisfied by 'flow' in a
1176 * switch with no more than 'max_ports' ports. */
1178 ofpacts_check(const struct ofpact ofpacts[], size_t ofpacts_len,
1179 const struct flow *flow, int max_ports)
1181 const struct ofpact *a;
1182 ovs_be16 dl_type = flow->dl_type;
1184 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1185 enum ofperr error = ofpact_check__(a, flow, max_ports, &dl_type);
1194 /* Verifies that the 'ofpacts_len' bytes of actions in 'ofpacts' are
1195 * in the appropriate order as defined by the OpenFlow spec. */
1197 ofpacts_verify(const struct ofpact ofpacts[], size_t ofpacts_len)
1199 const struct ofpact *a;
1200 enum ovs_instruction_type inst;
1202 inst = OVSINST_OFPIT11_APPLY_ACTIONS;
1203 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1204 enum ovs_instruction_type next;
1206 if (a->type == OFPACT_CLEAR_ACTIONS) {
1207 next = OVSINST_OFPIT11_CLEAR_ACTIONS;
1208 } else if (a->type == OFPACT_WRITE_METADATA) {
1209 next = OVSINST_OFPIT11_WRITE_METADATA;
1210 } else if (a->type == OFPACT_GOTO_TABLE) {
1211 next = OVSINST_OFPIT11_GOTO_TABLE;
1213 next = OVSINST_OFPIT11_APPLY_ACTIONS;
1216 if (inst != OVSINST_OFPIT11_APPLY_ACTIONS && next <= inst) {
1217 const char *name = ofpact_instruction_name_from_type(inst);
1218 const char *next_name = ofpact_instruction_name_from_type(next);
1221 VLOG_WARN("duplicate %s instruction not allowed, for OpenFlow "
1222 "1.1+ compatibility", name);
1224 VLOG_WARN("invalid instruction ordering: %s must appear "
1225 "before %s, for OpenFlow 1.1+ compatibility",
1228 return OFPERR_OFPBAC_UNSUPPORTED_ORDER;
1237 /* Converting ofpacts to Nicira OpenFlow extensions. */
1240 ofpact_output_reg_to_nxast(const struct ofpact_output_reg *output_reg,
1243 struct nx_action_output_reg *naor = ofputil_put_NXAST_OUTPUT_REG(out);
1245 naor->ofs_nbits = nxm_encode_ofs_nbits(output_reg->src.ofs,
1246 output_reg->src.n_bits);
1247 naor->src = htonl(output_reg->src.field->nxm_header);
1248 naor->max_len = htons(output_reg->max_len);
1252 ofpact_resubmit_to_nxast(const struct ofpact_resubmit *resubmit,
1255 struct nx_action_resubmit *nar;
1257 if (resubmit->table_id == 0xff
1258 && resubmit->ofpact.compat != OFPUTIL_NXAST_RESUBMIT_TABLE) {
1259 nar = ofputil_put_NXAST_RESUBMIT(out);
1261 nar = ofputil_put_NXAST_RESUBMIT_TABLE(out);
1262 nar->table = resubmit->table_id;
1264 nar->in_port = htons(resubmit->in_port);
1268 ofpact_set_tunnel_to_nxast(const struct ofpact_tunnel *tunnel,
1271 uint64_t tun_id = tunnel->tun_id;
1273 if (tun_id <= UINT32_MAX
1274 && tunnel->ofpact.compat != OFPUTIL_NXAST_SET_TUNNEL64) {
1275 ofputil_put_NXAST_SET_TUNNEL(out)->tun_id = htonl(tun_id);
1277 ofputil_put_NXAST_SET_TUNNEL64(out)->tun_id = htonll(tun_id);
1282 ofpact_write_metadata_to_nxast(const struct ofpact_metadata *om,
1285 struct nx_action_write_metadata *nawm;
1287 nawm = ofputil_put_NXAST_WRITE_METADATA(out);
1288 nawm->metadata = om->metadata;
1289 nawm->mask = om->mask;
1293 ofpact_note_to_nxast(const struct ofpact_note *note, struct ofpbuf *out)
1295 size_t start_ofs = out->size;
1296 struct nx_action_note *nan;
1297 unsigned int remainder;
1300 nan = ofputil_put_NXAST_NOTE(out);
1301 out->size -= sizeof nan->note;
1303 ofpbuf_put(out, note->data, note->length);
1305 len = out->size - start_ofs;
1306 remainder = len % OFP_ACTION_ALIGN;
1308 ofpbuf_put_zeros(out, OFP_ACTION_ALIGN - remainder);
1310 nan = (struct nx_action_note *)((char *)out->data + start_ofs);
1311 nan->len = htons(out->size - start_ofs);
1315 ofpact_controller_to_nxast(const struct ofpact_controller *oc,
1318 struct nx_action_controller *nac;
1320 nac = ofputil_put_NXAST_CONTROLLER(out);
1321 nac->max_len = htons(oc->max_len);
1322 nac->controller_id = htons(oc->controller_id);
1323 nac->reason = oc->reason;
1327 ofpact_dec_ttl_to_nxast(const struct ofpact_cnt_ids *oc_ids,
1330 if (oc_ids->ofpact.compat == OFPUTIL_NXAST_DEC_TTL) {
1331 ofputil_put_NXAST_DEC_TTL(out);
1333 struct nx_action_cnt_ids *nac_ids =
1334 ofputil_put_NXAST_DEC_TTL_CNT_IDS(out);
1335 int ids_len = ROUND_UP(2 * oc_ids->n_controllers, OFP_ACTION_ALIGN);
1339 nac_ids->len = htons(ntohs(nac_ids->len) + ids_len);
1340 nac_ids->n_controllers = htons(oc_ids->n_controllers);
1342 ids = ofpbuf_put_zeros(out, ids_len);
1343 for (i = 0; i < oc_ids->n_controllers; i++) {
1344 ids[i] = htons(oc_ids->cnt_ids[i]);
1350 ofpact_fin_timeout_to_nxast(const struct ofpact_fin_timeout *fin_timeout,
1353 struct nx_action_fin_timeout *naft = ofputil_put_NXAST_FIN_TIMEOUT(out);
1354 naft->fin_idle_timeout = htons(fin_timeout->fin_idle_timeout);
1355 naft->fin_hard_timeout = htons(fin_timeout->fin_hard_timeout);
1359 ofpact_to_nxast(const struct ofpact *a, struct ofpbuf *out)
1362 case OFPACT_CONTROLLER:
1363 ofpact_controller_to_nxast(ofpact_get_CONTROLLER(a), out);
1366 case OFPACT_OUTPUT_REG:
1367 ofpact_output_reg_to_nxast(ofpact_get_OUTPUT_REG(a), out);
1371 bundle_to_nxast(ofpact_get_BUNDLE(a), out);
1374 case OFPACT_REG_MOVE:
1375 nxm_reg_move_to_nxast(ofpact_get_REG_MOVE(a), out);
1378 case OFPACT_REG_LOAD:
1379 nxm_reg_load_to_nxast(ofpact_get_REG_LOAD(a), out);
1382 case OFPACT_DEC_TTL:
1383 ofpact_dec_ttl_to_nxast(ofpact_get_DEC_TTL(a), out);
1386 case OFPACT_SET_TUNNEL:
1387 ofpact_set_tunnel_to_nxast(ofpact_get_SET_TUNNEL(a), out);
1390 case OFPACT_WRITE_METADATA:
1391 ofpact_write_metadata_to_nxast(ofpact_get_WRITE_METADATA(a), out);
1394 case OFPACT_SET_QUEUE:
1395 ofputil_put_NXAST_SET_QUEUE(out)->queue_id
1396 = htonl(ofpact_get_SET_QUEUE(a)->queue_id);
1399 case OFPACT_POP_QUEUE:
1400 ofputil_put_NXAST_POP_QUEUE(out);
1403 case OFPACT_FIN_TIMEOUT:
1404 ofpact_fin_timeout_to_nxast(ofpact_get_FIN_TIMEOUT(a), out);
1407 case OFPACT_RESUBMIT:
1408 ofpact_resubmit_to_nxast(ofpact_get_RESUBMIT(a), out);
1412 learn_to_nxast(ofpact_get_LEARN(a), out);
1415 case OFPACT_MULTIPATH:
1416 multipath_to_nxast(ofpact_get_MULTIPATH(a), out);
1420 ofpact_note_to_nxast(ofpact_get_NOTE(a), out);
1424 ofputil_put_NXAST_EXIT(out);
1427 case OFPACT_PUSH_MPLS:
1428 ofputil_put_NXAST_PUSH_MPLS(out)->ethertype =
1429 ofpact_get_PUSH_MPLS(a)->ethertype;
1432 case OFPACT_POP_MPLS:
1433 ofputil_put_NXAST_POP_MPLS(out)->ethertype =
1434 ofpact_get_POP_MPLS(a)->ethertype;
1438 case OFPACT_ENQUEUE:
1439 case OFPACT_SET_VLAN_VID:
1440 case OFPACT_SET_VLAN_PCP:
1441 case OFPACT_STRIP_VLAN:
1442 case OFPACT_PUSH_VLAN:
1443 case OFPACT_SET_ETH_SRC:
1444 case OFPACT_SET_ETH_DST:
1445 case OFPACT_SET_IPV4_SRC:
1446 case OFPACT_SET_IPV4_DST:
1447 case OFPACT_SET_IPV4_DSCP:
1448 case OFPACT_SET_L4_SRC_PORT:
1449 case OFPACT_SET_L4_DST_PORT:
1450 case OFPACT_CLEAR_ACTIONS:
1451 case OFPACT_GOTO_TABLE:
1456 /* Converting ofpacts to OpenFlow 1.0. */
1459 ofpact_output_to_openflow10(const struct ofpact_output *output,
1462 struct ofp10_action_output *oao;
1464 oao = ofputil_put_OFPAT10_OUTPUT(out);
1465 oao->port = htons(output->port);
1466 oao->max_len = htons(output->max_len);
1470 ofpact_enqueue_to_openflow10(const struct ofpact_enqueue *enqueue,
1473 struct ofp10_action_enqueue *oae;
1475 oae = ofputil_put_OFPAT10_ENQUEUE(out);
1476 oae->port = htons(enqueue->port);
1477 oae->queue_id = htonl(enqueue->queue);
1481 ofpact_to_openflow10(const struct ofpact *a, struct ofpbuf *out)
1485 ofpact_output_to_openflow10(ofpact_get_OUTPUT(a), out);
1488 case OFPACT_ENQUEUE:
1489 ofpact_enqueue_to_openflow10(ofpact_get_ENQUEUE(a), out);
1492 case OFPACT_SET_VLAN_VID:
1493 ofputil_put_OFPAT10_SET_VLAN_VID(out)->vlan_vid
1494 = htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid);
1497 case OFPACT_SET_VLAN_PCP:
1498 ofputil_put_OFPAT10_SET_VLAN_PCP(out)->vlan_pcp
1499 = ofpact_get_SET_VLAN_PCP(a)->vlan_pcp;
1502 case OFPACT_STRIP_VLAN:
1503 ofputil_put_OFPAT10_STRIP_VLAN(out);
1506 case OFPACT_SET_ETH_SRC:
1507 memcpy(ofputil_put_OFPAT10_SET_DL_SRC(out)->dl_addr,
1508 ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
1511 case OFPACT_SET_ETH_DST:
1512 memcpy(ofputil_put_OFPAT10_SET_DL_DST(out)->dl_addr,
1513 ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
1516 case OFPACT_SET_IPV4_SRC:
1517 ofputil_put_OFPAT10_SET_NW_SRC(out)->nw_addr
1518 = ofpact_get_SET_IPV4_SRC(a)->ipv4;
1521 case OFPACT_SET_IPV4_DST:
1522 ofputil_put_OFPAT10_SET_NW_DST(out)->nw_addr
1523 = ofpact_get_SET_IPV4_DST(a)->ipv4;
1526 case OFPACT_SET_IPV4_DSCP:
1527 ofputil_put_OFPAT10_SET_NW_TOS(out)->nw_tos
1528 = ofpact_get_SET_IPV4_DSCP(a)->dscp;
1531 case OFPACT_SET_L4_SRC_PORT:
1532 ofputil_put_OFPAT10_SET_TP_SRC(out)->tp_port
1533 = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
1536 case OFPACT_SET_L4_DST_PORT:
1537 ofputil_put_OFPAT10_SET_TP_DST(out)->tp_port
1538 = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
1541 case OFPACT_PUSH_VLAN:
1542 case OFPACT_CLEAR_ACTIONS:
1543 case OFPACT_GOTO_TABLE:
1547 case OFPACT_CONTROLLER:
1548 case OFPACT_OUTPUT_REG:
1550 case OFPACT_REG_MOVE:
1551 case OFPACT_REG_LOAD:
1552 case OFPACT_DEC_TTL:
1553 case OFPACT_SET_TUNNEL:
1554 case OFPACT_WRITE_METADATA:
1555 case OFPACT_SET_QUEUE:
1556 case OFPACT_POP_QUEUE:
1557 case OFPACT_FIN_TIMEOUT:
1558 case OFPACT_RESUBMIT:
1560 case OFPACT_MULTIPATH:
1563 case OFPACT_PUSH_MPLS:
1564 case OFPACT_POP_MPLS:
1565 ofpact_to_nxast(a, out);
1570 /* Converts the 'ofpacts_len' bytes of ofpacts in 'ofpacts' into OpenFlow 1.0
1571 * actions in 'openflow', appending the actions to any existing data in
1574 ofpacts_put_openflow10(const struct ofpact ofpacts[], size_t ofpacts_len,
1575 struct ofpbuf *openflow)
1577 const struct ofpact *a;
1579 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1580 ofpact_to_openflow10(a, openflow);
1584 /* Converting ofpacts to OpenFlow 1.1. */
1587 ofpact_output_to_openflow11(const struct ofpact_output *output,
1590 struct ofp11_action_output *oao;
1592 oao = ofputil_put_OFPAT11_OUTPUT(out);
1593 oao->port = ofputil_port_to_ofp11(output->port);
1594 oao->max_len = htons(output->max_len);
1598 ofpact_dec_ttl_to_openflow11(const struct ofpact_cnt_ids *dec_ttl,
1601 if (dec_ttl->n_controllers == 1 && dec_ttl->cnt_ids[0] == 0
1602 && (!dec_ttl->ofpact.compat ||
1603 dec_ttl->ofpact.compat == OFPUTIL_OFPAT11_DEC_NW_TTL)) {
1604 ofputil_put_OFPAT11_DEC_NW_TTL(out);
1606 ofpact_dec_ttl_to_nxast(dec_ttl, out);
1611 ofpact_to_openflow11(const struct ofpact *a, struct ofpbuf *out)
1615 return ofpact_output_to_openflow11(ofpact_get_OUTPUT(a), out);
1617 case OFPACT_ENQUEUE:
1621 case OFPACT_SET_VLAN_VID:
1622 ofputil_put_OFPAT11_SET_VLAN_VID(out)->vlan_vid
1623 = htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid);
1626 case OFPACT_SET_VLAN_PCP:
1627 ofputil_put_OFPAT11_SET_VLAN_PCP(out)->vlan_pcp
1628 = ofpact_get_SET_VLAN_PCP(a)->vlan_pcp;
1631 case OFPACT_STRIP_VLAN:
1632 ofputil_put_OFPAT11_POP_VLAN(out);
1635 case OFPACT_PUSH_VLAN:
1636 /* XXX ETH_TYPE_VLAN_8021AD case */
1637 ofputil_put_OFPAT11_PUSH_VLAN(out)->ethertype =
1638 htons(ETH_TYPE_VLAN_8021Q);
1641 case OFPACT_SET_QUEUE:
1642 ofputil_put_OFPAT11_SET_QUEUE(out)->queue_id
1643 = htonl(ofpact_get_SET_QUEUE(a)->queue_id);
1646 case OFPACT_SET_ETH_SRC:
1647 memcpy(ofputil_put_OFPAT11_SET_DL_SRC(out)->dl_addr,
1648 ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
1651 case OFPACT_SET_ETH_DST:
1652 memcpy(ofputil_put_OFPAT11_SET_DL_DST(out)->dl_addr,
1653 ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
1656 case OFPACT_SET_IPV4_SRC:
1657 ofputil_put_OFPAT11_SET_NW_SRC(out)->nw_addr
1658 = ofpact_get_SET_IPV4_SRC(a)->ipv4;
1661 case OFPACT_SET_IPV4_DST:
1662 ofputil_put_OFPAT11_SET_NW_DST(out)->nw_addr
1663 = ofpact_get_SET_IPV4_DST(a)->ipv4;
1666 case OFPACT_SET_IPV4_DSCP:
1667 ofputil_put_OFPAT11_SET_NW_TOS(out)->nw_tos
1668 = ofpact_get_SET_IPV4_DSCP(a)->dscp;
1671 case OFPACT_SET_L4_SRC_PORT:
1672 ofputil_put_OFPAT11_SET_TP_SRC(out)->tp_port
1673 = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
1676 case OFPACT_SET_L4_DST_PORT:
1677 ofputil_put_OFPAT11_SET_TP_DST(out)->tp_port
1678 = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
1681 case OFPACT_DEC_TTL:
1682 ofpact_dec_ttl_to_openflow11(ofpact_get_DEC_TTL(a), out);
1685 case OFPACT_WRITE_METADATA:
1686 /* OpenFlow 1.1 uses OFPIT_WRITE_METADATA to express this action. */
1689 case OFPACT_PUSH_MPLS:
1690 ofputil_put_OFPAT11_PUSH_MPLS(out)->ethertype =
1691 ofpact_get_PUSH_MPLS(a)->ethertype;
1694 case OFPACT_POP_MPLS:
1695 ofputil_put_OFPAT11_POP_MPLS(out)->ethertype =
1696 ofpact_get_POP_MPLS(a)->ethertype;
1700 case OFPACT_CLEAR_ACTIONS:
1701 case OFPACT_GOTO_TABLE:
1704 case OFPACT_CONTROLLER:
1705 case OFPACT_OUTPUT_REG:
1707 case OFPACT_REG_MOVE:
1708 case OFPACT_REG_LOAD:
1709 case OFPACT_SET_TUNNEL:
1710 case OFPACT_POP_QUEUE:
1711 case OFPACT_FIN_TIMEOUT:
1712 case OFPACT_RESUBMIT:
1714 case OFPACT_MULTIPATH:
1717 ofpact_to_nxast(a, out);
1722 /* Converts the ofpacts in 'ofpacts' (terminated by OFPACT_END) into OpenFlow
1723 * 1.1 actions in 'openflow', appending the actions to any existing data in
1726 ofpacts_put_openflow11_actions(const struct ofpact ofpacts[],
1727 size_t ofpacts_len, struct ofpbuf *openflow)
1729 const struct ofpact *a;
1730 size_t start_size = openflow->size;
1732 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1733 ofpact_to_openflow11(a, openflow);
1736 return openflow->size - start_size;
1740 ofpacts_update_instruction_actions(struct ofpbuf *openflow, size_t ofs)
1742 struct ofp11_instruction_actions *oia;
1744 /* Update the instruction's length (or, if it's empty, delete it). */
1745 oia = ofpbuf_at_assert(openflow, ofs, sizeof *oia);
1746 if (openflow->size > ofs + sizeof *oia) {
1747 oia->len = htons(openflow->size - ofs);
1749 openflow->size = ofs;
1754 ofpacts_put_openflow11_instructions(const struct ofpact ofpacts[],
1756 struct ofpbuf *openflow)
1758 const struct ofpact *a;
1760 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1761 /* XXX Write-Actions */
1763 if (a->type == OFPACT_CLEAR_ACTIONS) {
1764 instruction_put_OFPIT11_CLEAR_ACTIONS(openflow);
1765 } else if (a->type == OFPACT_GOTO_TABLE) {
1766 struct ofp11_instruction_goto_table *oigt;
1768 oigt = instruction_put_OFPIT11_GOTO_TABLE(openflow);
1769 oigt->table_id = ofpact_get_GOTO_TABLE(a)->table_id;
1770 memset(oigt->pad, 0, sizeof oigt->pad);
1771 } else if (a->type == OFPACT_WRITE_METADATA) {
1772 const struct ofpact_metadata *om;
1773 struct ofp11_instruction_write_metadata *oiwm;
1775 om = ofpact_get_WRITE_METADATA(a);
1776 oiwm = instruction_put_OFPIT11_WRITE_METADATA(openflow);
1777 oiwm->metadata = om->metadata;
1778 oiwm->metadata_mask = om->mask;
1779 } else if (!ofpact_is_instruction(a)) {
1781 const size_t ofs = openflow->size;
1782 const size_t ofpacts_len_left =
1783 (uint8_t*)ofpact_end(ofpacts, ofpacts_len) - (uint8_t*)a;
1784 const struct ofpact *action;
1785 const struct ofpact *processed = a;
1787 instruction_put_OFPIT11_APPLY_ACTIONS(openflow);
1788 OFPACT_FOR_EACH(action, a, ofpacts_len_left) {
1789 if (ofpact_is_instruction(action)) {
1792 ofpact_to_openflow11(action, openflow);
1795 ofpacts_update_instruction_actions(openflow, ofs);
1801 /* Returns true if 'action' outputs to 'port', false otherwise. */
1803 ofpact_outputs_to_port(const struct ofpact *ofpact, uint16_t port)
1805 switch (ofpact->type) {
1807 return ofpact_get_OUTPUT(ofpact)->port == port;
1808 case OFPACT_ENQUEUE:
1809 return ofpact_get_ENQUEUE(ofpact)->port == port;
1810 case OFPACT_CONTROLLER:
1811 return port == OFPP_CONTROLLER;
1813 case OFPACT_OUTPUT_REG:
1815 case OFPACT_SET_VLAN_VID:
1816 case OFPACT_SET_VLAN_PCP:
1817 case OFPACT_STRIP_VLAN:
1818 case OFPACT_PUSH_VLAN:
1819 case OFPACT_SET_ETH_SRC:
1820 case OFPACT_SET_ETH_DST:
1821 case OFPACT_SET_IPV4_SRC:
1822 case OFPACT_SET_IPV4_DST:
1823 case OFPACT_SET_IPV4_DSCP:
1824 case OFPACT_SET_L4_SRC_PORT:
1825 case OFPACT_SET_L4_DST_PORT:
1826 case OFPACT_REG_MOVE:
1827 case OFPACT_REG_LOAD:
1828 case OFPACT_DEC_TTL:
1829 case OFPACT_SET_TUNNEL:
1830 case OFPACT_WRITE_METADATA:
1831 case OFPACT_SET_QUEUE:
1832 case OFPACT_POP_QUEUE:
1833 case OFPACT_FIN_TIMEOUT:
1834 case OFPACT_RESUBMIT:
1836 case OFPACT_MULTIPATH:
1839 case OFPACT_PUSH_MPLS:
1840 case OFPACT_POP_MPLS:
1841 case OFPACT_CLEAR_ACTIONS:
1842 case OFPACT_GOTO_TABLE:
1848 /* Returns true if any action in the 'ofpacts_len' bytes of 'ofpacts' outputs
1849 * to 'port', false otherwise. */
1851 ofpacts_output_to_port(const struct ofpact *ofpacts, size_t ofpacts_len,
1854 const struct ofpact *a;
1856 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
1857 if (ofpact_outputs_to_port(a, port)) {
1866 ofpacts_equal(const struct ofpact *a, size_t a_len,
1867 const struct ofpact *b, size_t b_len)
1869 return a_len == b_len && !memcmp(a, b, a_len);
1872 /* Formatting ofpacts. */
1875 print_note(const struct ofpact_note *note, struct ds *string)
1879 ds_put_cstr(string, "note:");
1880 for (i = 0; i < note->length; i++) {
1882 ds_put_char(string, '.');
1884 ds_put_format(string, "%02"PRIx8, note->data[i]);
1889 print_dec_ttl(const struct ofpact_cnt_ids *ids,
1894 ds_put_cstr(s, "dec_ttl");
1895 if (ids->ofpact.compat == OFPUTIL_NXAST_DEC_TTL_CNT_IDS) {
1896 ds_put_cstr(s, "(");
1897 for (i = 0; i < ids->n_controllers; i++) {
1899 ds_put_cstr(s, ",");
1901 ds_put_format(s, "%"PRIu16, ids->cnt_ids[i]);
1903 ds_put_cstr(s, ")");
1908 print_fin_timeout(const struct ofpact_fin_timeout *fin_timeout,
1911 ds_put_cstr(s, "fin_timeout(");
1912 if (fin_timeout->fin_idle_timeout) {
1913 ds_put_format(s, "idle_timeout=%"PRIu16",",
1914 fin_timeout->fin_idle_timeout);
1916 if (fin_timeout->fin_hard_timeout) {
1917 ds_put_format(s, "hard_timeout=%"PRIu16",",
1918 fin_timeout->fin_hard_timeout);
1921 ds_put_char(s, ')');
1925 ofpact_format(const struct ofpact *a, struct ds *s)
1927 const struct ofpact_enqueue *enqueue;
1928 const struct ofpact_resubmit *resubmit;
1929 const struct ofpact_controller *controller;
1930 const struct ofpact_metadata *metadata;
1931 const struct ofpact_tunnel *tunnel;
1936 port = ofpact_get_OUTPUT(a)->port;
1937 if (port < OFPP_MAX) {
1938 ds_put_format(s, "output:%"PRIu16, port);
1940 ofputil_format_port(port, s);
1941 if (port == OFPP_CONTROLLER) {
1942 ds_put_format(s, ":%"PRIu16, ofpact_get_OUTPUT(a)->max_len);
1947 case OFPACT_CONTROLLER:
1948 controller = ofpact_get_CONTROLLER(a);
1949 if (controller->reason == OFPR_ACTION &&
1950 controller->controller_id == 0) {
1951 ds_put_format(s, "CONTROLLER:%"PRIu16,
1952 ofpact_get_CONTROLLER(a)->max_len);
1954 enum ofp_packet_in_reason reason = controller->reason;
1956 ds_put_cstr(s, "controller(");
1957 if (reason != OFPR_ACTION) {
1958 ds_put_format(s, "reason=%s,",
1959 ofputil_packet_in_reason_to_string(reason));
1961 if (controller->max_len != UINT16_MAX) {
1962 ds_put_format(s, "max_len=%"PRIu16",", controller->max_len);
1964 if (controller->controller_id != 0) {
1965 ds_put_format(s, "id=%"PRIu16",", controller->controller_id);
1968 ds_put_char(s, ')');
1972 case OFPACT_ENQUEUE:
1973 enqueue = ofpact_get_ENQUEUE(a);
1974 ds_put_format(s, "enqueue:");
1975 ofputil_format_port(enqueue->port, s);
1976 ds_put_format(s, "q%"PRIu32, enqueue->queue);
1979 case OFPACT_OUTPUT_REG:
1980 ds_put_cstr(s, "output:");
1981 mf_format_subfield(&ofpact_get_OUTPUT_REG(a)->src, s);
1985 bundle_format(ofpact_get_BUNDLE(a), s);
1988 case OFPACT_SET_VLAN_VID:
1989 ds_put_format(s, "mod_vlan_vid:%"PRIu16,
1990 ofpact_get_SET_VLAN_VID(a)->vlan_vid);
1993 case OFPACT_SET_VLAN_PCP:
1994 ds_put_format(s, "mod_vlan_pcp:%"PRIu8,
1995 ofpact_get_SET_VLAN_PCP(a)->vlan_pcp);
1998 case OFPACT_STRIP_VLAN:
1999 ds_put_cstr(s, "strip_vlan");
2002 case OFPACT_PUSH_VLAN:
2003 /* XXX 802.1AD case*/
2004 ds_put_format(s, "push_vlan:%#"PRIx16, ETH_TYPE_VLAN_8021Q);
2007 case OFPACT_SET_ETH_SRC:
2008 ds_put_format(s, "mod_dl_src:"ETH_ADDR_FMT,
2009 ETH_ADDR_ARGS(ofpact_get_SET_ETH_SRC(a)->mac));
2012 case OFPACT_SET_ETH_DST:
2013 ds_put_format(s, "mod_dl_dst:"ETH_ADDR_FMT,
2014 ETH_ADDR_ARGS(ofpact_get_SET_ETH_DST(a)->mac));
2017 case OFPACT_SET_IPV4_SRC:
2018 ds_put_format(s, "mod_nw_src:"IP_FMT,
2019 IP_ARGS(ofpact_get_SET_IPV4_SRC(a)->ipv4));
2022 case OFPACT_SET_IPV4_DST:
2023 ds_put_format(s, "mod_nw_dst:"IP_FMT,
2024 IP_ARGS(ofpact_get_SET_IPV4_DST(a)->ipv4));
2027 case OFPACT_SET_IPV4_DSCP:
2028 ds_put_format(s, "mod_nw_tos:%d", ofpact_get_SET_IPV4_DSCP(a)->dscp);
2031 case OFPACT_SET_L4_SRC_PORT:
2032 ds_put_format(s, "mod_tp_src:%d", ofpact_get_SET_L4_SRC_PORT(a)->port);
2035 case OFPACT_SET_L4_DST_PORT:
2036 ds_put_format(s, "mod_tp_dst:%d", ofpact_get_SET_L4_DST_PORT(a)->port);
2039 case OFPACT_REG_MOVE:
2040 nxm_format_reg_move(ofpact_get_REG_MOVE(a), s);
2043 case OFPACT_REG_LOAD:
2044 nxm_format_reg_load(ofpact_get_REG_LOAD(a), s);
2047 case OFPACT_DEC_TTL:
2048 print_dec_ttl(ofpact_get_DEC_TTL(a), s);
2051 case OFPACT_SET_TUNNEL:
2052 tunnel = ofpact_get_SET_TUNNEL(a);
2053 ds_put_format(s, "set_tunnel%s:%#"PRIx64,
2054 (tunnel->tun_id > UINT32_MAX
2055 || a->compat == OFPUTIL_NXAST_SET_TUNNEL64 ? "64" : ""),
2059 case OFPACT_SET_QUEUE:
2060 ds_put_format(s, "set_queue:%"PRIu32,
2061 ofpact_get_SET_QUEUE(a)->queue_id);
2064 case OFPACT_POP_QUEUE:
2065 ds_put_cstr(s, "pop_queue");
2068 case OFPACT_FIN_TIMEOUT:
2069 print_fin_timeout(ofpact_get_FIN_TIMEOUT(a), s);
2072 case OFPACT_RESUBMIT:
2073 resubmit = ofpact_get_RESUBMIT(a);
2074 if (resubmit->in_port != OFPP_IN_PORT && resubmit->table_id == 255) {
2075 ds_put_cstr(s, "resubmit:");
2076 ofputil_format_port(resubmit->in_port, s);
2078 ds_put_format(s, "resubmit(");
2079 if (resubmit->in_port != OFPP_IN_PORT) {
2080 ofputil_format_port(resubmit->in_port, s);
2082 ds_put_char(s, ',');
2083 if (resubmit->table_id != 255) {
2084 ds_put_format(s, "%"PRIu8, resubmit->table_id);
2086 ds_put_char(s, ')');
2091 learn_format(ofpact_get_LEARN(a), s);
2094 case OFPACT_MULTIPATH:
2095 multipath_format(ofpact_get_MULTIPATH(a), s);
2099 print_note(ofpact_get_NOTE(a), s);
2102 case OFPACT_PUSH_MPLS:
2103 ds_put_format(s, "push_mpls:0x%04"PRIx16,
2104 ntohs(ofpact_get_PUSH_MPLS(a)->ethertype));
2107 case OFPACT_POP_MPLS:
2108 ds_put_format(s, "pop_mpls:0x%04"PRIx16,
2109 ntohs(ofpact_get_POP_MPLS(a)->ethertype));
2113 ds_put_cstr(s, "exit");
2116 case OFPACT_CLEAR_ACTIONS:
2117 ds_put_format(s, "%s",
2118 ofpact_instruction_name_from_type(
2119 OVSINST_OFPIT11_CLEAR_ACTIONS));
2122 case OFPACT_WRITE_METADATA:
2123 metadata = ofpact_get_WRITE_METADATA(a);
2124 ds_put_format(s, "%s:%#"PRIx64,
2125 ofpact_instruction_name_from_type(
2126 OVSINST_OFPIT11_WRITE_METADATA),
2127 ntohll(metadata->metadata));
2128 if (metadata->mask != htonll(UINT64_MAX)) {
2129 ds_put_format(s, "/%#"PRIx64, ntohll(metadata->mask));
2133 case OFPACT_GOTO_TABLE:
2134 ds_put_format(s, "%s:%"PRIu8,
2135 ofpact_instruction_name_from_type(
2136 OVSINST_OFPIT11_GOTO_TABLE),
2137 ofpact_get_GOTO_TABLE(a)->table_id);
2142 /* Appends a string representing the 'ofpacts_len' bytes of ofpacts in
2143 * 'ofpacts' to 'string'. */
2145 ofpacts_format(const struct ofpact *ofpacts, size_t ofpacts_len,
2148 ds_put_cstr(string, "actions=");
2150 ds_put_cstr(string, "drop");
2152 const struct ofpact *a;
2154 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2156 ds_put_cstr(string, ",");
2159 /* XXX write-actions */
2160 ofpact_format(a, string);
2165 /* Internal use by helpers. */
2168 ofpact_put(struct ofpbuf *ofpacts, enum ofpact_type type, size_t len)
2170 struct ofpact *ofpact;
2172 ofpact_pad(ofpacts);
2173 ofpact = ofpacts->l2 = ofpbuf_put_uninit(ofpacts, len);
2174 ofpact_init(ofpact, type, len);
2179 ofpact_init(struct ofpact *ofpact, enum ofpact_type type, size_t len)
2181 memset(ofpact, 0, len);
2182 ofpact->type = type;
2183 ofpact->compat = OFPUTIL_ACTION_INVALID;
2187 /* Updates 'ofpact->len' to the number of bytes in the tail of 'ofpacts'
2188 * starting at 'ofpact'.
2190 * This is the correct way to update a variable-length ofpact's length after
2191 * adding the variable-length part of the payload. (See the large comment
2192 * near the end of ofp-actions.h for more information.) */
2194 ofpact_update_len(struct ofpbuf *ofpacts, struct ofpact *ofpact)
2196 ovs_assert(ofpact == ofpacts->l2);
2197 ofpact->len = (char *) ofpbuf_tail(ofpacts) - (char *) ofpact;
2200 /* Pads out 'ofpacts' to a multiple of OFPACT_ALIGNTO bytes in length. Each
2201 * ofpact_put_<ENUM>() calls this function automatically beforehand, but the
2202 * client must call this itself after adding the final ofpact to an array of
2205 * (The consequences of failing to call this function are probably not dire.
2206 * OFPACT_FOR_EACH will calculate a pointer beyond the end of the ofpacts, but
2207 * not dereference it. That's undefined behavior, technically, but it will not
2208 * cause a real problem on common systems. Still, it seems better to call
2211 ofpact_pad(struct ofpbuf *ofpacts)
2213 unsigned int rem = ofpacts->size % OFPACT_ALIGNTO;
2215 ofpbuf_put_zeros(ofpacts, OFPACT_ALIGNTO - rem);
2220 ofpact_set_field_init(struct ofpact_reg_load *load, const struct mf_field *mf,
2223 load->ofpact.compat = OFPUTIL_OFPAT12_SET_FIELD;
2224 load->dst.field = mf;
2226 load->dst.n_bits = mf->n_bits;
2227 bitwise_copy(src, mf->n_bytes, load->dst.ofs,
2228 &load->subvalue, sizeof load->subvalue, 0, mf->n_bits);