2 * Copyright (c) 2010, 2011, 2012, 2013, 2014 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.
19 #include "ofp-parse.h"
26 #include "byte-order.h"
27 #include "dynamic-string.h"
29 #include "meta-flow.h"
30 #include "multipath.h"
33 #include "ofp-actions.h"
36 #include "openflow/openflow.h"
37 #include "ovs-thread.h"
40 #include "socket-util.h"
43 /* Parses 'str' as an 8-bit unsigned integer into '*valuep'.
45 * 'name' describes the value parsed in an error message, if any.
47 * Returns NULL if successful, otherwise a malloc()'d string describing the
48 * error. The caller is responsible for freeing the returned string. */
49 static char * WARN_UNUSED_RESULT
50 str_to_u8(const char *str, const char *name, uint8_t *valuep)
54 if (!str_to_int(str, 0, &value) || value < 0 || value > 255) {
55 return xasprintf("invalid %s \"%s\"", name, str);
61 /* Parses 'str' as a 16-bit unsigned integer into '*valuep'.
63 * 'name' describes the value parsed in an error message, if any.
65 * Returns NULL if successful, otherwise a malloc()'d string describing the
66 * error. The caller is responsible for freeing the returned string. */
67 static char * WARN_UNUSED_RESULT
68 str_to_u16(const char *str, const char *name, uint16_t *valuep)
72 if (!str_to_int(str, 0, &value) || value < 0 || value > 65535) {
73 return xasprintf("invalid %s \"%s\"", name, str);
79 /* Parses 'str' as a 32-bit unsigned integer into '*valuep'.
81 * Returns NULL if successful, otherwise a malloc()'d string describing the
82 * error. The caller is responsible for freeing the returned string. */
83 static char * WARN_UNUSED_RESULT
84 str_to_u32(const char *str, uint32_t *valuep)
90 return xstrdup("missing required numeric argument");
94 value = strtoul(str, &tail, 0);
95 if (errno == EINVAL || errno == ERANGE || *tail) {
96 return xasprintf("invalid numeric format %s", str);
102 /* Parses 'str' as an 64-bit unsigned integer into '*valuep'.
104 * Returns NULL if successful, otherwise a malloc()'d string describing the
105 * error. The caller is responsible for freeing the returned string. */
106 static char * WARN_UNUSED_RESULT
107 str_to_u64(const char *str, uint64_t *valuep)
113 return xstrdup("missing required numeric argument");
117 value = strtoull(str, &tail, 0);
118 if (errno == EINVAL || errno == ERANGE || *tail) {
119 return xasprintf("invalid numeric format %s", str);
125 /* Parses 'str' as an 64-bit unsigned integer in network byte order into
128 * Returns NULL if successful, otherwise a malloc()'d string describing the
129 * error. The caller is responsible for freeing the returned string. */
130 static char * WARN_UNUSED_RESULT
131 str_to_be64(const char *str, ovs_be64 *valuep)
136 error = str_to_u64(str, &value);
138 *valuep = htonll(value);
143 /* Parses 'str' as an Ethernet address into 'mac'.
145 * Returns NULL if successful, otherwise a malloc()'d string describing the
146 * error. The caller is responsible for freeing the returned string. */
147 static char * WARN_UNUSED_RESULT
148 str_to_mac(const char *str, uint8_t mac[6])
150 if (!ovs_scan(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))) {
151 return xasprintf("invalid mac address %s", str);
156 /* Parses 'str' as an IP address into '*ip'.
158 * Returns NULL if successful, otherwise a malloc()'d string describing the
159 * error. The caller is responsible for freeing the returned string. */
160 static char * WARN_UNUSED_RESULT
161 str_to_ip(const char *str, ovs_be32 *ip)
163 struct in_addr in_addr;
165 if (lookup_ip(str, &in_addr)) {
166 return xasprintf("%s: could not convert to IP address", str);
168 *ip = in_addr.s_addr;
172 /* Parses 'arg' as the argument to an "enqueue" action, and appends such an
173 * action to 'ofpacts'.
175 * Returns NULL if successful, otherwise a malloc()'d string describing the
176 * error. The caller is responsible for freeing the returned string. */
177 static char * WARN_UNUSED_RESULT
178 parse_enqueue(char *arg, struct ofpbuf *ofpacts)
181 char *port = strtok_r(arg, ":q,", &sp);
182 char *queue = strtok_r(NULL, "", &sp);
183 struct ofpact_enqueue *enqueue;
185 if (port == NULL || queue == NULL) {
186 return xstrdup("\"enqueue\" syntax is \"enqueue:PORT:QUEUE\" or "
187 "\"enqueue(PORT,QUEUE)\"");
190 enqueue = ofpact_put_ENQUEUE(ofpacts);
191 if (!ofputil_port_from_string(port, &enqueue->port)) {
192 return xasprintf("%s: enqueue to unknown port", port);
194 return str_to_u32(queue, &enqueue->queue);
197 /* Parses 'arg' as the argument to an "output" action, and appends such an
198 * action to 'ofpacts'.
200 * Returns NULL if successful, otherwise a malloc()'d string describing the
201 * error. The caller is responsible for freeing the returned string. */
202 static char * WARN_UNUSED_RESULT
203 parse_output(const char *arg, struct ofpbuf *ofpacts)
205 if (strchr(arg, '[')) {
206 struct ofpact_output_reg *output_reg;
208 output_reg = ofpact_put_OUTPUT_REG(ofpacts);
209 output_reg->max_len = UINT16_MAX;
210 return mf_parse_subfield(&output_reg->src, arg);
212 struct ofpact_output *output;
214 output = ofpact_put_OUTPUT(ofpacts);
215 if (!ofputil_port_from_string(arg, &output->port)) {
216 return xasprintf("%s: output to unknown port", arg);
218 output->max_len = output->port == OFPP_CONTROLLER ? UINT16_MAX : 0;
223 /* Parses 'arg' as the argument to an "resubmit" action, and appends such an
224 * action to 'ofpacts'.
226 * Returns NULL if successful, otherwise a malloc()'d string describing the
227 * error. The caller is responsible for freeing the returned string. */
228 static char * WARN_UNUSED_RESULT
229 parse_resubmit(char *arg, struct ofpbuf *ofpacts)
231 struct ofpact_resubmit *resubmit;
232 char *in_port_s, *table_s;
234 resubmit = ofpact_put_RESUBMIT(ofpacts);
236 in_port_s = strsep(&arg, ",");
237 if (in_port_s && in_port_s[0]) {
238 if (!ofputil_port_from_string(in_port_s, &resubmit->in_port)) {
239 return xasprintf("%s: resubmit to unknown port", in_port_s);
242 resubmit->in_port = OFPP_IN_PORT;
245 table_s = strsep(&arg, ",");
246 if (table_s && table_s[0]) {
247 uint32_t table_id = 0;
250 error = str_to_u32(table_s, &table_id);
254 resubmit->table_id = table_id;
256 resubmit->table_id = 255;
259 if (resubmit->in_port == OFPP_IN_PORT && resubmit->table_id == 255) {
260 return xstrdup("at least one \"in_port\" or \"table\" must be "
261 "specified on resubmit");
266 /* Parses 'arg' as the argument to a "note" action, and appends such an action
269 * Returns NULL if successful, otherwise a malloc()'d string describing the
270 * error. The caller is responsible for freeing the returned string. */
271 static char * WARN_UNUSED_RESULT
272 parse_note(const char *arg, struct ofpbuf *ofpacts)
274 struct ofpact_note *note;
276 note = ofpact_put_NOTE(ofpacts);
277 while (*arg != '\0') {
288 byte = hexits_value(arg, 2, &ok);
290 return xstrdup("bad hex digit in `note' argument");
292 ofpbuf_put(ofpacts, &byte, 1);
294 note = ofpacts->frame;
299 ofpact_update_len(ofpacts, ¬e->ofpact);
303 /* Parses 'arg' as the argument to a "fin_timeout" action, and appends such an
304 * action to 'ofpacts'.
306 * Returns NULL if successful, otherwise a malloc()'d string describing the
307 * error. The caller is responsible for freeing the returned string. */
308 static char * WARN_UNUSED_RESULT
309 parse_fin_timeout(struct ofpbuf *b, char *arg)
311 struct ofpact_fin_timeout *oft = ofpact_put_FIN_TIMEOUT(b);
314 while (ofputil_parse_key_value(&arg, &key, &value)) {
317 if (!strcmp(key, "idle_timeout")) {
318 error = str_to_u16(value, key, &oft->fin_idle_timeout);
319 } else if (!strcmp(key, "hard_timeout")) {
320 error = str_to_u16(value, key, &oft->fin_hard_timeout);
322 error = xasprintf("invalid key '%s' in 'fin_timeout' argument",
333 /* Parses 'arg' as the argument to a "controller" action, and appends such an
334 * action to 'ofpacts'.
336 * Returns NULL if successful, otherwise a malloc()'d string describing the
337 * error. The caller is responsible for freeing the returned string. */
338 static char * WARN_UNUSED_RESULT
339 parse_controller(struct ofpbuf *b, char *arg)
341 enum ofp_packet_in_reason reason = OFPR_ACTION;
342 uint16_t controller_id = 0;
343 uint16_t max_len = UINT16_MAX;
347 } else if (strspn(arg, "0123456789") == strlen(arg)) {
348 char *error = str_to_u16(arg, "max_len", &max_len);
355 while (ofputil_parse_key_value(&arg, &name, &value)) {
356 if (!strcmp(name, "reason")) {
357 if (!ofputil_packet_in_reason_from_string(value, &reason)) {
358 return xasprintf("unknown reason \"%s\"", value);
360 } else if (!strcmp(name, "max_len")) {
361 char *error = str_to_u16(value, "max_len", &max_len);
365 } else if (!strcmp(name, "id")) {
366 char *error = str_to_u16(value, "id", &controller_id);
371 return xasprintf("unknown key \"%s\" parsing controller "
377 if (reason == OFPR_ACTION && controller_id == 0) {
378 struct ofpact_output *output;
380 output = ofpact_put_OUTPUT(b);
381 output->port = OFPP_CONTROLLER;
382 output->max_len = max_len;
384 struct ofpact_controller *controller;
386 controller = ofpact_put_CONTROLLER(b);
387 controller->max_len = max_len;
388 controller->reason = reason;
389 controller->controller_id = controller_id;
396 parse_noargs_dec_ttl(struct ofpbuf *b)
398 struct ofpact_cnt_ids *ids;
401 ofpact_put_DEC_TTL(b);
402 ofpbuf_put(b, &id, sizeof id);
404 ids->n_controllers++;
405 ofpact_update_len(b, &ids->ofpact);
408 /* Parses 'arg' as the argument to a "dec_ttl" action, and appends such an
409 * action to 'ofpacts'.
411 * Returns NULL if successful, otherwise a malloc()'d string describing the
412 * error. The caller is responsible for freeing the returned string. */
413 static char * WARN_UNUSED_RESULT
414 parse_dec_ttl(struct ofpbuf *b, char *arg)
417 parse_noargs_dec_ttl(b);
419 struct ofpact_cnt_ids *ids;
422 ids = ofpact_put_DEC_TTL(b);
423 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL_CNT_IDS;
424 for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL;
425 cntr = strtok_r(NULL, ", ", &arg)) {
426 uint16_t id = atoi(cntr);
428 ofpbuf_put(b, &id, sizeof id);
430 ids->n_controllers++;
432 if (!ids->n_controllers) {
433 return xstrdup("dec_ttl_cnt_ids: expected at least one controller "
436 ofpact_update_len(b, &ids->ofpact);
441 /* Parses 'arg' as the argument to a "set_mpls_label" action, and appends such
444 * Returns NULL if successful, otherwise a malloc()'d string describing the
445 * error. The caller is responsible for freeing the returned string. */
446 static char * WARN_UNUSED_RESULT
447 parse_set_mpls_label(struct ofpbuf *b, const char *arg)
449 struct ofpact_mpls_label *mpls_label = ofpact_put_SET_MPLS_LABEL(b);
452 return xstrdup("parse_set_mpls_label: expected label.");
455 mpls_label->label = htonl(atoi(arg));
459 /* Parses 'arg' as the argument to a "set_mpls_tc" action, and appends such an
462 * Returns NULL if successful, otherwise a malloc()'d string describing the
463 * error. The caller is responsible for freeing the returned string. */
464 static char * WARN_UNUSED_RESULT
465 parse_set_mpls_tc(struct ofpbuf *b, const char *arg)
467 struct ofpact_mpls_tc *mpls_tc = ofpact_put_SET_MPLS_TC(b);
470 return xstrdup("parse_set_mpls_tc: expected tc.");
473 mpls_tc->tc = atoi(arg);
477 /* Parses 'arg' as the argument to a "set_mpls_ttl" action, and appends such an
478 * action to 'ofpacts'.
480 * Returns NULL if successful, otherwise a malloc()'d string describing the
481 * error. The caller is responsible for freeing the returned string. */
482 static char * WARN_UNUSED_RESULT
483 parse_set_mpls_ttl(struct ofpbuf *b, const char *arg)
485 struct ofpact_mpls_ttl *mpls_ttl = ofpact_put_SET_MPLS_TTL(b);
488 return xstrdup("parse_set_mpls_ttl: expected ttl.");
491 mpls_ttl->ttl = atoi(arg);
495 /* Parses a "set_field" action with argument 'arg', appending the parsed
496 * action to 'ofpacts'.
498 * Returns NULL if successful, otherwise a malloc()'d string describing the
499 * error. The caller is responsible for freeing the returned string. */
500 static char * WARN_UNUSED_RESULT
501 set_field_parse__(char *arg, struct ofpbuf *ofpacts,
502 enum ofputil_protocol *usable_protocols)
504 struct ofpact_set_field *sf = ofpact_put_SET_FIELD(ofpacts);
508 const struct mf_field *mf;
512 delim = strstr(arg, "->");
514 return xasprintf("%s: missing `->'", arg);
516 if (strlen(delim) <= strlen("->")) {
517 return xasprintf("%s: missing field name following `->'", arg);
520 key = delim + strlen("->");
521 mf = mf_from_name(key);
523 return xasprintf("%s is not a valid OXM field name", key);
526 return xasprintf("%s is read-only", key);
530 error = mf_parse_value(mf, value, &sf->value);
535 if (!mf_is_value_valid(mf, &sf->value)) {
536 return xasprintf("%s is not a valid value for field %s", value, key);
539 *usable_protocols &= mf->usable_protocols;
543 /* Parses 'arg' as the argument to a "set_field" action, and appends such an
544 * action to 'ofpacts'.
546 * Returns NULL if successful, otherwise a malloc()'d string describing the
547 * error. The caller is responsible for freeing the returned string. */
548 static char * WARN_UNUSED_RESULT
549 set_field_parse(const char *arg, struct ofpbuf *ofpacts,
550 enum ofputil_protocol *usable_protocols)
552 char *copy = xstrdup(arg);
553 char *error = set_field_parse__(copy, ofpacts, usable_protocols);
558 /* Parses 'arg' as the argument to a "write_metadata" instruction, and appends
559 * such an action to 'ofpacts'.
561 * Returns NULL if successful, otherwise a malloc()'d string describing the
562 * error. The caller is responsible for freeing the returned string. */
563 static char * WARN_UNUSED_RESULT
564 parse_metadata(struct ofpbuf *b, char *arg)
566 struct ofpact_metadata *om;
567 char *mask = strchr(arg, '/');
569 om = ofpact_put_WRITE_METADATA(b);
575 error = str_to_be64(mask + 1, &om->mask);
580 om->mask = OVS_BE64_MAX;
583 return str_to_be64(arg, &om->metadata);
586 /* Parses 'arg' as the argument to a "sample" action, and appends such an
587 * action to 'ofpacts'.
589 * Returns NULL if successful, otherwise a malloc()'d string describing the
590 * error. The caller is responsible for freeing the returned string. */
591 static char * WARN_UNUSED_RESULT
592 parse_sample(struct ofpbuf *b, char *arg)
594 struct ofpact_sample *os = ofpact_put_SAMPLE(b);
597 while (ofputil_parse_key_value(&arg, &key, &value)) {
600 if (!strcmp(key, "probability")) {
601 error = str_to_u16(value, "probability", &os->probability);
602 if (!error && os->probability == 0) {
603 error = xasprintf("invalid probability value \"%s\"", value);
605 } else if (!strcmp(key, "collector_set_id")) {
606 error = str_to_u32(value, &os->collector_set_id);
607 } else if (!strcmp(key, "obs_domain_id")) {
608 error = str_to_u32(value, &os->obs_domain_id);
609 } else if (!strcmp(key, "obs_point_id")) {
610 error = str_to_u32(value, &os->obs_point_id);
612 error = xasprintf("invalid key \"%s\" in \"sample\" argument",
619 if (os->probability == 0) {
620 return xstrdup("non-zero \"probability\" must be specified on sample");
625 /* Parses 'arg' as the argument to action 'code', and appends such an action to
628 * Returns NULL if successful, otherwise a malloc()'d string describing the
629 * error. The caller is responsible for freeing the returned string. */
630 static char * WARN_UNUSED_RESULT
631 parse_named_action(enum ofputil_action_code code,
632 char *arg, struct ofpbuf *ofpacts,
633 enum ofputil_protocol *usable_protocols)
635 size_t orig_size = ofpbuf_size(ofpacts);
636 struct ofpact_tunnel *tunnel;
637 struct ofpact_vlan_vid *vlan_vid;
638 struct ofpact_vlan_pcp *vlan_pcp;
640 uint16_t ethertype = 0;
648 case OFPUTIL_ACTION_INVALID:
651 case OFPUTIL_OFPAT10_OUTPUT:
652 case OFPUTIL_OFPAT11_OUTPUT:
653 case OFPUTIL_OFPAT13_OUTPUT:
654 error = parse_output(arg, ofpacts);
657 case OFPUTIL_OFPAT10_SET_VLAN_VID:
658 case OFPUTIL_OFPAT11_SET_VLAN_VID:
659 error = str_to_u16(arg, "VLAN VID", &vid);
664 if (vid & ~VLAN_VID_MASK) {
665 return xasprintf("%s: not a valid VLAN VID", arg);
667 vlan_vid = ofpact_put_SET_VLAN_VID(ofpacts);
668 vlan_vid->vlan_vid = vid;
669 vlan_vid->ofpact.compat = code;
670 vlan_vid->push_vlan_if_needed = code == OFPUTIL_OFPAT10_SET_VLAN_VID;
673 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
674 case OFPUTIL_OFPAT11_SET_VLAN_PCP:
675 error = str_to_u8(arg, "VLAN PCP", &pcp);
681 return xasprintf("%s: not a valid VLAN PCP", arg);
683 vlan_pcp = ofpact_put_SET_VLAN_PCP(ofpacts);
684 vlan_pcp->vlan_pcp = pcp;
685 vlan_pcp->ofpact.compat = code;
686 vlan_pcp->push_vlan_if_needed = code == OFPUTIL_OFPAT10_SET_VLAN_PCP;
689 case OFPUTIL_OFPAT12_SET_FIELD:
690 case OFPUTIL_OFPAT13_SET_FIELD:
691 return set_field_parse(arg, ofpacts, usable_protocols);
693 case OFPUTIL_OFPAT10_STRIP_VLAN:
694 case OFPUTIL_OFPAT11_POP_VLAN:
695 case OFPUTIL_OFPAT13_POP_VLAN:
696 ofpact_put_STRIP_VLAN(ofpacts)->ofpact.compat = code;
699 case OFPUTIL_OFPAT11_PUSH_VLAN:
700 case OFPUTIL_OFPAT13_PUSH_VLAN:
701 *usable_protocols &= OFPUTIL_P_OF11_UP;
702 error = str_to_u16(arg, "ethertype", ðertype);
707 if (ethertype != ETH_TYPE_VLAN_8021Q) {
708 /* XXX ETH_TYPE_VLAN_8021AD case isn't supported */
709 return xasprintf("%s: not a valid VLAN ethertype", arg);
712 ofpact_put_PUSH_VLAN(ofpacts);
715 case OFPUTIL_OFPAT11_SET_QUEUE:
716 case OFPUTIL_OFPAT13_SET_QUEUE:
717 error = str_to_u32(arg, &ofpact_put_SET_QUEUE(ofpacts)->queue_id);
720 case OFPUTIL_OFPAT10_SET_DL_SRC:
721 case OFPUTIL_OFPAT11_SET_DL_SRC:
722 error = str_to_mac(arg, ofpact_put_SET_ETH_SRC(ofpacts)->mac);
725 case OFPUTIL_OFPAT10_SET_DL_DST:
726 case OFPUTIL_OFPAT11_SET_DL_DST:
727 error = str_to_mac(arg, ofpact_put_SET_ETH_DST(ofpacts)->mac);
730 case OFPUTIL_OFPAT10_SET_NW_SRC:
731 case OFPUTIL_OFPAT11_SET_NW_SRC:
732 error = str_to_ip(arg, &ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4);
735 case OFPUTIL_OFPAT10_SET_NW_DST:
736 case OFPUTIL_OFPAT11_SET_NW_DST:
737 error = str_to_ip(arg, &ofpact_put_SET_IPV4_DST(ofpacts)->ipv4);
740 case OFPUTIL_OFPAT10_SET_NW_TOS:
741 case OFPUTIL_OFPAT11_SET_NW_TOS:
742 error = str_to_u8(arg, "TOS", &tos);
747 if (tos & ~IP_DSCP_MASK) {
748 return xasprintf("%s: not a valid TOS", arg);
750 ofpact_put_SET_IP_DSCP(ofpacts)->dscp = tos;
753 case OFPUTIL_OFPAT11_SET_NW_ECN:
754 error = str_to_u8(arg, "ECN", &ecn);
759 if (ecn & ~IP_ECN_MASK) {
760 return xasprintf("%s: not a valid ECN", arg);
762 ofpact_put_SET_IP_ECN(ofpacts)->ecn = ecn;
765 case OFPUTIL_OFPAT11_SET_NW_TTL:
766 case OFPUTIL_OFPAT13_SET_NW_TTL:
767 error = str_to_u8(arg, "TTL", &ttl);
772 ofpact_put_SET_IP_TTL(ofpacts)->ttl = ttl;
775 case OFPUTIL_OFPAT11_DEC_NW_TTL:
776 case OFPUTIL_OFPAT13_DEC_NW_TTL:
779 case OFPUTIL_OFPAT10_SET_TP_SRC:
780 case OFPUTIL_OFPAT11_SET_TP_SRC:
781 error = str_to_u16(arg, "source port",
782 &ofpact_put_SET_L4_SRC_PORT(ofpacts)->port);
785 case OFPUTIL_OFPAT10_SET_TP_DST:
786 case OFPUTIL_OFPAT11_SET_TP_DST:
787 error = str_to_u16(arg, "destination port",
788 &ofpact_put_SET_L4_DST_PORT(ofpacts)->port);
791 case OFPUTIL_OFPAT10_ENQUEUE:
792 error = parse_enqueue(arg, ofpacts);
795 case OFPUTIL_NXAST_RESUBMIT:
796 error = parse_resubmit(arg, ofpacts);
799 case OFPUTIL_NXAST_SET_TUNNEL:
800 case OFPUTIL_NXAST_SET_TUNNEL64:
801 tunnel = ofpact_put_SET_TUNNEL(ofpacts);
802 tunnel->ofpact.compat = code;
803 error = str_to_u64(arg, &tunnel->tun_id);
806 case OFPUTIL_NXAST_WRITE_METADATA:
807 error = parse_metadata(ofpacts, arg);
810 case OFPUTIL_NXAST_SET_QUEUE:
811 error = str_to_u32(arg, &ofpact_put_SET_QUEUE(ofpacts)->queue_id);
814 case OFPUTIL_NXAST_POP_QUEUE:
815 ofpact_put_POP_QUEUE(ofpacts);
818 case OFPUTIL_NXAST_REG_MOVE:
819 error = nxm_parse_reg_move(ofpact_put_REG_MOVE(ofpacts), arg);
822 case OFPUTIL_NXAST_REG_LOAD:
823 error = nxm_parse_reg_load(ofpact_put_REG_LOAD(ofpacts), arg);
826 case OFPUTIL_NXAST_NOTE:
827 error = parse_note(arg, ofpacts);
830 case OFPUTIL_NXAST_MULTIPATH:
831 error = multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg);
834 case OFPUTIL_NXAST_BUNDLE:
835 error = bundle_parse(arg, ofpacts);
838 case OFPUTIL_NXAST_BUNDLE_LOAD:
839 error = bundle_parse_load(arg, ofpacts);
842 case OFPUTIL_NXAST_RESUBMIT_TABLE:
843 case OFPUTIL_NXAST_OUTPUT_REG:
844 case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
847 case OFPUTIL_NXAST_LEARN:
848 error = learn_parse(arg, ofpacts);
851 case OFPUTIL_NXAST_EXIT:
852 ofpact_put_EXIT(ofpacts);
855 case OFPUTIL_NXAST_DEC_TTL:
856 error = parse_dec_ttl(ofpacts, arg);
859 case OFPUTIL_NXAST_SET_MPLS_LABEL:
860 case OFPUTIL_OFPAT11_SET_MPLS_LABEL:
861 error = parse_set_mpls_label(ofpacts, arg);
864 case OFPUTIL_NXAST_SET_MPLS_TC:
865 case OFPUTIL_OFPAT11_SET_MPLS_TC:
866 error = parse_set_mpls_tc(ofpacts, arg);
869 case OFPUTIL_NXAST_SET_MPLS_TTL:
870 case OFPUTIL_OFPAT11_SET_MPLS_TTL:
871 case OFPUTIL_OFPAT13_SET_MPLS_TTL:
872 error = parse_set_mpls_ttl(ofpacts, arg);
875 case OFPUTIL_OFPAT11_DEC_MPLS_TTL:
876 case OFPUTIL_OFPAT13_DEC_MPLS_TTL:
877 case OFPUTIL_NXAST_DEC_MPLS_TTL:
878 ofpact_put_DEC_MPLS_TTL(ofpacts);
881 case OFPUTIL_NXAST_FIN_TIMEOUT:
882 error = parse_fin_timeout(ofpacts, arg);
885 case OFPUTIL_NXAST_CONTROLLER:
886 error = parse_controller(ofpacts, arg);
889 case OFPUTIL_OFPAT11_PUSH_MPLS:
890 case OFPUTIL_OFPAT13_PUSH_MPLS:
891 case OFPUTIL_NXAST_PUSH_MPLS:
892 error = str_to_u16(arg, "push_mpls", ðertype);
894 ofpact_put_PUSH_MPLS(ofpacts)->ethertype = htons(ethertype);
898 case OFPUTIL_OFPAT11_POP_MPLS:
899 case OFPUTIL_OFPAT13_POP_MPLS:
900 case OFPUTIL_NXAST_POP_MPLS:
901 error = str_to_u16(arg, "pop_mpls", ðertype);
903 ofpact_put_POP_MPLS(ofpacts)->ethertype = htons(ethertype);
907 case OFPUTIL_OFPAT11_GROUP:
908 case OFPUTIL_OFPAT13_GROUP:
909 error = str_to_u32(arg, &ofpact_put_GROUP(ofpacts)->group_id);
912 /* FIXME when implement OFPAT13_* */
913 case OFPUTIL_OFPAT13_COPY_TTL_OUT:
914 case OFPUTIL_OFPAT13_COPY_TTL_IN:
915 case OFPUTIL_OFPAT13_PUSH_PBB:
916 case OFPUTIL_OFPAT13_POP_PBB:
919 case OFPUTIL_NXAST_STACK_PUSH:
920 error = nxm_parse_stack_action(ofpact_put_STACK_PUSH(ofpacts), arg);
922 case OFPUTIL_NXAST_STACK_POP:
923 error = nxm_parse_stack_action(ofpact_put_STACK_POP(ofpacts), arg);
926 case OFPUTIL_NXAST_SAMPLE:
927 error = parse_sample(ofpacts, arg);
932 ofpbuf_set_size(ofpacts, orig_size);
937 /* Parses action 'act', with argument 'arg', and appends a parsed version to
940 * 'n_actions' specifies the number of actions already parsed (for proper
941 * handling of "drop" actions).
943 * Returns NULL if successful, otherwise a malloc()'d string describing the
944 * error. The caller is responsible for freeing the returned string. */
945 static char * WARN_UNUSED_RESULT
946 str_to_ofpact__(char *pos, char *act, char *arg,
947 struct ofpbuf *ofpacts, int n_actions,
948 enum ofputil_protocol *usable_protocols)
950 int code = ofputil_action_code_from_name(act);
952 return parse_named_action(code, arg, ofpacts, usable_protocols);
953 } else if (!strcasecmp(act, "drop")) {
955 return xstrdup("Drop actions must not be preceded by other "
957 } else if (ofputil_parse_key_value(&pos, &act, &arg)) {
958 return xstrdup("Drop actions must not be followed by other "
963 if (ofputil_port_from_string(act, &port)) {
964 ofpact_put_OUTPUT(ofpacts)->port = port;
966 return xasprintf("Unknown action: %s", act);
973 /* Parses 'str' as a series of actions, and appends them to 'ofpacts'.
975 * Returns NULL if successful, otherwise a malloc()'d string describing the
976 * error. The caller is responsible for freeing the returned string. */
977 static char * WARN_UNUSED_RESULT
978 str_to_ofpacts__(char *str, struct ofpbuf *ofpacts,
979 enum ofputil_protocol *usable_protocols)
981 size_t orig_size = ofpbuf_size(ofpacts);
982 char *pos, *act, *arg;
987 while (ofputil_parse_key_value(&pos, &act, &arg)) {
988 char *error = str_to_ofpact__(pos, act, arg, ofpacts, n_actions,
991 ofpbuf_set_size(ofpacts, orig_size);
1002 /* Parses 'str' as a series of actions, and appends them to 'ofpacts'.
1004 * Returns NULL if successful, otherwise a malloc()'d string describing the
1005 * error. The caller is responsible for freeing the returned string. */
1006 static char * WARN_UNUSED_RESULT
1007 str_to_ofpacts(char *str, struct ofpbuf *ofpacts,
1008 enum ofputil_protocol *usable_protocols)
1010 size_t orig_size = ofpbuf_size(ofpacts);
1014 error_s = str_to_ofpacts__(str, ofpacts, usable_protocols);
1019 error = ofpacts_verify(ofpbuf_data(ofpacts), ofpbuf_size(ofpacts));
1021 ofpbuf_set_size(ofpacts, orig_size);
1022 return xstrdup("Incorrect action ordering");
1028 /* Parses 'arg' as the argument to instruction 'type', and appends such an
1029 * instruction to 'ofpacts'.
1031 * Returns NULL if successful, otherwise a malloc()'d string describing the
1032 * error. The caller is responsible for freeing the returned string. */
1033 static char * WARN_UNUSED_RESULT
1034 parse_named_instruction(enum ovs_instruction_type type,
1035 char *arg, struct ofpbuf *ofpacts,
1036 enum ofputil_protocol *usable_protocols)
1038 char *error_s = NULL;
1041 *usable_protocols &= OFPUTIL_P_OF11_UP;
1044 case OVSINST_OFPIT11_APPLY_ACTIONS:
1045 OVS_NOT_REACHED(); /* This case is handled by str_to_inst_ofpacts() */
1048 case OVSINST_OFPIT11_WRITE_ACTIONS: {
1049 struct ofpact_nest *on;
1052 ofpact_pad(ofpacts);
1053 ofs = ofpbuf_size(ofpacts);
1054 ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS,
1055 offsetof(struct ofpact_nest, actions));
1056 error_s = str_to_ofpacts__(arg, ofpacts, usable_protocols);
1058 on = ofpbuf_at_assert(ofpacts, ofs, sizeof *on);
1059 on->ofpact.len = ofpbuf_size(ofpacts) - ofs;
1062 ofpbuf_set_size(ofpacts, ofs);
1067 case OVSINST_OFPIT11_CLEAR_ACTIONS:
1068 ofpact_put_CLEAR_ACTIONS(ofpacts);
1071 case OVSINST_OFPIT13_METER:
1072 *usable_protocols &= OFPUTIL_P_OF13_UP;
1073 error_s = str_to_u32(arg, &ofpact_put_METER(ofpacts)->meter_id);
1076 case OVSINST_OFPIT11_WRITE_METADATA:
1077 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
1078 error_s = parse_metadata(ofpacts, arg);
1081 case OVSINST_OFPIT11_GOTO_TABLE: {
1082 struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts);
1083 char *table_s = strsep(&arg, ",");
1084 if (!table_s || !table_s[0]) {
1085 return xstrdup("instruction goto-table needs table id");
1087 error_s = str_to_u8(table_s, "table", &ogt->table_id);
1096 /* If write_metadata is specified as an action AND an instruction, ofpacts
1097 could be invalid. */
1098 error = ofpacts_verify(ofpbuf_data(ofpacts), ofpbuf_size(ofpacts));
1100 return xstrdup("Incorrect instruction ordering");
1105 /* Parses 'str' as a series of instructions, and appends them to 'ofpacts'.
1107 * Returns NULL if successful, otherwise a malloc()'d string describing the
1108 * error. The caller is responsible for freeing the returned string. */
1109 static char * WARN_UNUSED_RESULT
1110 str_to_inst_ofpacts(char *str, struct ofpbuf *ofpacts,
1111 enum ofputil_protocol *usable_protocols)
1113 size_t orig_size = ofpbuf_size(ofpacts);
1114 char *pos, *inst, *arg;
1116 const char *prev_inst = NULL;
1121 while (ofputil_parse_key_value(&pos, &inst, &arg)) {
1122 type = ovs_instruction_type_from_name(inst);
1124 char *error = str_to_ofpact__(pos, inst, arg, ofpacts, n_actions,
1127 ofpbuf_set_size(ofpacts, orig_size);
1131 type = OVSINST_OFPIT11_APPLY_ACTIONS;
1132 if (prev_type == type) {
1136 } else if (type == OVSINST_OFPIT11_APPLY_ACTIONS) {
1137 ofpbuf_set_size(ofpacts, orig_size);
1138 return xasprintf("%s isn't supported. Just write actions then "
1139 "it is interpreted as apply_actions", inst);
1141 char *error = parse_named_instruction(type, arg, ofpacts,
1144 ofpbuf_set_size(ofpacts, orig_size);
1149 if (type <= prev_type) {
1150 ofpbuf_set_size(ofpacts, orig_size);
1151 if (type == prev_type) {
1152 return xasprintf("instruction %s may be specified only once",
1155 return xasprintf("instruction %s must be specified before %s",
1164 ofpact_pad(ofpacts);
1176 parse_protocol(const char *name, const struct protocol **p_out)
1178 static const struct protocol protocols[] = {
1179 { "ip", ETH_TYPE_IP, 0 },
1180 { "arp", ETH_TYPE_ARP, 0 },
1181 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
1182 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
1183 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
1184 { "sctp", ETH_TYPE_IP, IPPROTO_SCTP },
1185 { "ipv6", ETH_TYPE_IPV6, 0 },
1186 { "ip6", ETH_TYPE_IPV6, 0 },
1187 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
1188 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
1189 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
1190 { "sctp6", ETH_TYPE_IPV6, IPPROTO_SCTP },
1191 { "rarp", ETH_TYPE_RARP, 0},
1192 { "mpls", ETH_TYPE_MPLS, 0 },
1193 { "mplsm", ETH_TYPE_MPLS_MCAST, 0 },
1195 const struct protocol *p;
1197 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
1198 if (!strcmp(p->name, name)) {
1207 /* Parses 's' as the (possibly masked) value of field 'mf', and updates
1208 * 'match' appropriately. Restricts the set of usable protocols to ones
1209 * supporting the parsed field.
1211 * Returns NULL if successful, otherwise a malloc()'d string describing the
1212 * error. The caller is responsible for freeing the returned string. */
1213 static char * WARN_UNUSED_RESULT
1214 parse_field(const struct mf_field *mf, const char *s, struct match *match,
1215 enum ofputil_protocol *usable_protocols)
1217 union mf_value value, mask;
1220 error = mf_parse(mf, s, &value, &mask);
1222 *usable_protocols &= mf_set(mf, &value, &mask, match);
1227 static char * WARN_UNUSED_RESULT
1228 parse_ofp_str__(struct ofputil_flow_mod *fm, int command, char *string,
1229 enum ofputil_protocol *usable_protocols)
1232 F_OUT_PORT = 1 << 0,
1235 F_PRIORITY = 1 << 4,
1238 char *save_ptr = NULL;
1239 char *act_str = NULL;
1242 *usable_protocols = OFPUTIL_P_ANY;
1246 fields = F_OUT_PORT;
1250 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
1254 fields = F_OUT_PORT;
1257 case OFPFC_DELETE_STRICT:
1258 fields = F_OUT_PORT | F_PRIORITY;
1262 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
1265 case OFPFC_MODIFY_STRICT:
1266 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
1273 match_init_catchall(&fm->match);
1274 fm->priority = OFP_DEFAULT_PRIORITY;
1275 fm->cookie = htonll(0);
1276 fm->cookie_mask = htonll(0);
1277 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
1278 /* For modify, by default, don't update the cookie. */
1279 fm->new_cookie = OVS_BE64_MAX;
1281 fm->new_cookie = htonll(0);
1283 fm->modify_cookie = false;
1284 fm->table_id = 0xff;
1285 fm->command = command;
1286 fm->idle_timeout = OFP_FLOW_PERMANENT;
1287 fm->hard_timeout = OFP_FLOW_PERMANENT;
1288 fm->buffer_id = UINT32_MAX;
1289 fm->out_port = OFPP_ANY;
1291 fm->out_group = OFPG11_ANY;
1292 fm->delete_reason = OFPRR_DELETE;
1293 if (fields & F_ACTIONS) {
1294 act_str = strstr(string, "action");
1296 return xstrdup("must specify an action");
1300 act_str = strchr(act_str + 1, '=');
1302 return xstrdup("must specify an action");
1307 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1308 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1309 const struct protocol *p;
1312 if (parse_protocol(name, &p)) {
1313 match_set_dl_type(&fm->match, htons(p->dl_type));
1315 match_set_nw_proto(&fm->match, p->nw_proto);
1317 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
1318 fm->flags |= OFPUTIL_FF_SEND_FLOW_REM;
1319 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
1320 fm->flags |= OFPUTIL_FF_CHECK_OVERLAP;
1321 } else if (fields & F_FLAGS && !strcmp(name, "reset_counts")) {
1322 fm->flags |= OFPUTIL_FF_RESET_COUNTS;
1323 *usable_protocols &= OFPUTIL_P_OF12_UP;
1324 } else if (fields & F_FLAGS && !strcmp(name, "no_packet_counts")) {
1325 fm->flags |= OFPUTIL_FF_NO_PKT_COUNTS;
1326 *usable_protocols &= OFPUTIL_P_OF13_UP;
1327 } else if (fields & F_FLAGS && !strcmp(name, "no_byte_counts")) {
1328 fm->flags |= OFPUTIL_FF_NO_BYT_COUNTS;
1329 *usable_protocols &= OFPUTIL_P_OF13_UP;
1330 } else if (!strcmp(name, "no_readonly_table")
1331 || !strcmp(name, "allow_hidden_fields")) {
1332 /* ignore these fields. */
1336 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1338 return xasprintf("field %s missing value", name);
1341 if (!strcmp(name, "table")) {
1342 error = str_to_u8(value, "table", &fm->table_id);
1343 if (fm->table_id != 0xff) {
1344 *usable_protocols &= OFPUTIL_P_TID;
1346 } else if (!strcmp(name, "out_port")) {
1347 if (!ofputil_port_from_string(value, &fm->out_port)) {
1348 error = xasprintf("%s is not a valid OpenFlow port",
1351 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
1352 uint16_t priority = 0;
1354 error = str_to_u16(value, name, &priority);
1355 fm->priority = priority;
1356 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
1357 error = str_to_u16(value, name, &fm->idle_timeout);
1358 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
1359 error = str_to_u16(value, name, &fm->hard_timeout);
1360 } else if (!strcmp(name, "cookie")) {
1361 char *mask = strchr(value, '/');
1364 /* A mask means we're searching for a cookie. */
1365 if (command == OFPFC_ADD) {
1366 return xstrdup("flow additions cannot use "
1370 error = str_to_be64(value, &fm->cookie);
1374 error = str_to_be64(mask + 1, &fm->cookie_mask);
1376 /* Matching of the cookie is only supported through NXM or
1378 if (fm->cookie_mask != htonll(0)) {
1379 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
1382 /* No mask means that the cookie is being set. */
1383 if (command != OFPFC_ADD && command != OFPFC_MODIFY
1384 && command != OFPFC_MODIFY_STRICT) {
1385 return xstrdup("cannot set cookie");
1387 error = str_to_be64(value, &fm->new_cookie);
1388 fm->modify_cookie = true;
1390 } else if (mf_from_name(name)) {
1391 error = parse_field(mf_from_name(name), value, &fm->match,
1393 } else if (!strcmp(name, "duration")
1394 || !strcmp(name, "n_packets")
1395 || !strcmp(name, "n_bytes")
1396 || !strcmp(name, "idle_age")
1397 || !strcmp(name, "hard_age")) {
1398 /* Ignore these, so that users can feed the output of
1399 * "ovs-ofctl dump-flows" back into commands that parse
1402 error = xasprintf("unknown keyword %s", name);
1410 /* Check for usable protocol interdependencies between match fields. */
1411 if (fm->match.flow.dl_type == htons(ETH_TYPE_IPV6)) {
1412 const struct flow_wildcards *wc = &fm->match.wc;
1413 /* Only NXM and OXM support matching L3 and L4 fields within IPv6.
1415 * (IPv6 specific fields as well as arp_sha, arp_tha, nw_frag, and
1416 * nw_ttl are covered elsewhere so they don't need to be included in
1419 if (wc->masks.nw_proto || wc->masks.nw_tos
1420 || wc->masks.tp_src || wc->masks.tp_dst) {
1421 *usable_protocols &= OFPUTIL_P_NXM_OXM_ANY;
1424 if (!fm->cookie_mask && fm->new_cookie == OVS_BE64_MAX
1425 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
1426 /* On modifies without a mask, we are supposed to add a flow if
1427 * one does not exist. If a cookie wasn't been specified, use a
1428 * default of zero. */
1429 fm->new_cookie = htonll(0);
1431 if (fields & F_ACTIONS) {
1432 struct ofpbuf ofpacts;
1435 ofpbuf_init(&ofpacts, 32);
1436 error = str_to_inst_ofpacts(act_str, &ofpacts, usable_protocols);
1440 err = ofpacts_check(ofpbuf_data(&ofpacts), ofpbuf_size(&ofpacts), &fm->match.flow,
1441 OFPP_MAX, fm->table_id, 255, usable_protocols);
1442 if (!err && !usable_protocols) {
1443 err = OFPERR_OFPBAC_MATCH_INCONSISTENT;
1446 error = xasprintf("actions are invalid with specified match "
1447 "(%s)", ofperr_to_string(err));
1452 ofpbuf_uninit(&ofpacts);
1456 fm->ofpacts_len = ofpbuf_size(&ofpacts);
1457 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
1459 fm->ofpacts_len = 0;
1466 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
1467 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
1468 * Returns the set of usable protocols in '*usable_protocols'.
1470 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
1471 * constant for 'command'. To parse syntax for an OFPST_FLOW or
1472 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'.
1474 * Returns NULL if successful, otherwise a malloc()'d string describing the
1475 * error. The caller is responsible for freeing the returned string. */
1476 char * WARN_UNUSED_RESULT
1477 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
1478 enum ofputil_protocol *usable_protocols)
1480 char *string = xstrdup(str_);
1483 error = parse_ofp_str__(fm, command, string, usable_protocols);
1486 fm->ofpacts_len = 0;
1493 static char * WARN_UNUSED_RESULT
1494 parse_ofp_meter_mod_str__(struct ofputil_meter_mod *mm, char *string,
1495 struct ofpbuf *bands, int command,
1496 enum ofputil_protocol *usable_protocols)
1503 char *save_ptr = NULL;
1504 char *band_str = NULL;
1507 /* Meters require at least OF 1.3. */
1508 *usable_protocols = OFPUTIL_P_OF13_UP;
1516 fields = F_METER | F_FLAGS | F_BANDS;
1519 case OFPMC13_DELETE:
1523 case OFPMC13_MODIFY:
1524 fields = F_METER | F_FLAGS | F_BANDS;
1531 mm->command = command;
1532 mm->meter.meter_id = 0;
1533 mm->meter.flags = 0;
1534 if (fields & F_BANDS) {
1535 band_str = strstr(string, "band");
1537 return xstrdup("must specify bands");
1541 band_str = strchr(band_str + 1, '=');
1543 return xstrdup("must specify bands");
1548 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1549 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1551 if (fields & F_FLAGS && !strcmp(name, "kbps")) {
1552 mm->meter.flags |= OFPMF13_KBPS;
1553 } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
1554 mm->meter.flags |= OFPMF13_PKTPS;
1555 } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
1556 mm->meter.flags |= OFPMF13_BURST;
1557 } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
1558 mm->meter.flags |= OFPMF13_STATS;
1562 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1564 return xasprintf("field %s missing value", name);
1567 if (!strcmp(name, "meter")) {
1568 if (!strcmp(value, "all")) {
1569 mm->meter.meter_id = OFPM13_ALL;
1570 } else if (!strcmp(value, "controller")) {
1571 mm->meter.meter_id = OFPM13_CONTROLLER;
1572 } else if (!strcmp(value, "slowpath")) {
1573 mm->meter.meter_id = OFPM13_SLOWPATH;
1575 char *error = str_to_u32(value, &mm->meter.meter_id);
1579 if (mm->meter.meter_id > OFPM13_MAX) {
1580 return xasprintf("invalid value for %s", name);
1584 return xasprintf("unknown keyword %s", name);
1588 if (fields & F_METER && !mm->meter.meter_id) {
1589 return xstrdup("must specify 'meter'");
1591 if (fields & F_FLAGS && !mm->meter.flags) {
1592 return xstrdup("meter must specify either 'kbps' or 'pktps'");
1595 if (fields & F_BANDS) {
1596 uint16_t n_bands = 0;
1597 struct ofputil_meter_band *band = NULL;
1600 for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
1601 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1605 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1607 return xasprintf("field %s missing value", name);
1610 if (!strcmp(name, "type")) {
1611 /* Start a new band */
1612 band = ofpbuf_put_zeros(bands, sizeof *band);
1615 if (!strcmp(value, "drop")) {
1616 band->type = OFPMBT13_DROP;
1617 } else if (!strcmp(value, "dscp_remark")) {
1618 band->type = OFPMBT13_DSCP_REMARK;
1620 return xasprintf("field %s unknown value %s", name, value);
1622 } else if (!band || !band->type) {
1623 return xstrdup("band must start with the 'type' keyword");
1624 } else if (!strcmp(name, "rate")) {
1625 char *error = str_to_u32(value, &band->rate);
1629 } else if (!strcmp(name, "burst_size")) {
1630 char *error = str_to_u32(value, &band->burst_size);
1634 } else if (!strcmp(name, "prec_level")) {
1635 char *error = str_to_u8(value, name, &band->prec_level);
1640 return xasprintf("unknown keyword %s", name);
1643 /* validate bands */
1645 return xstrdup("meter must have bands");
1648 mm->meter.n_bands = n_bands;
1649 mm->meter.bands = ofpbuf_steal_data(bands);
1651 for (i = 0; i < n_bands; ++i) {
1652 band = &mm->meter.bands[i];
1655 return xstrdup("band must have 'type'");
1657 if (band->type == OFPMBT13_DSCP_REMARK) {
1658 if (!band->prec_level) {
1659 return xstrdup("'dscp_remark' band must have"
1663 if (band->prec_level) {
1664 return xstrdup("Only 'dscp_remark' band may have"
1669 return xstrdup("band must have 'rate'");
1671 if (mm->meter.flags & OFPMF13_BURST) {
1672 if (!band->burst_size) {
1673 return xstrdup("band must have 'burst_size' "
1674 "when 'burst' flag is set");
1677 if (band->burst_size) {
1678 return xstrdup("band may have 'burst_size' only "
1679 "when 'burst' flag is set");
1684 mm->meter.n_bands = 0;
1685 mm->meter.bands = NULL;
1691 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
1692 * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
1694 * Returns NULL if successful, otherwise a malloc()'d string describing the
1695 * error. The caller is responsible for freeing the returned string. */
1696 char * WARN_UNUSED_RESULT
1697 parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
1698 int command, enum ofputil_protocol *usable_protocols)
1700 struct ofpbuf bands;
1704 ofpbuf_init(&bands, 64);
1705 string = xstrdup(str_);
1707 error = parse_ofp_meter_mod_str__(mm, string, &bands, command,
1711 ofpbuf_uninit(&bands);
1716 static char * WARN_UNUSED_RESULT
1717 parse_flow_monitor_request__(struct ofputil_flow_monitor_request *fmr,
1718 const char *str_, char *string,
1719 enum ofputil_protocol *usable_protocols)
1721 static atomic_uint32_t id = ATOMIC_VAR_INIT(0);
1722 char *save_ptr = NULL;
1725 atomic_add(&id, 1, &fmr->id);
1727 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
1728 | NXFMF_OWN | NXFMF_ACTIONS);
1729 fmr->out_port = OFPP_NONE;
1730 fmr->table_id = 0xff;
1731 match_init_catchall(&fmr->match);
1733 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1734 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1735 const struct protocol *p;
1737 if (!strcmp(name, "!initial")) {
1738 fmr->flags &= ~NXFMF_INITIAL;
1739 } else if (!strcmp(name, "!add")) {
1740 fmr->flags &= ~NXFMF_ADD;
1741 } else if (!strcmp(name, "!delete")) {
1742 fmr->flags &= ~NXFMF_DELETE;
1743 } else if (!strcmp(name, "!modify")) {
1744 fmr->flags &= ~NXFMF_MODIFY;
1745 } else if (!strcmp(name, "!actions")) {
1746 fmr->flags &= ~NXFMF_ACTIONS;
1747 } else if (!strcmp(name, "!own")) {
1748 fmr->flags &= ~NXFMF_OWN;
1749 } else if (parse_protocol(name, &p)) {
1750 match_set_dl_type(&fmr->match, htons(p->dl_type));
1752 match_set_nw_proto(&fmr->match, p->nw_proto);
1757 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1759 return xasprintf("%s: field %s missing value", str_, name);
1762 if (!strcmp(name, "table")) {
1763 char *error = str_to_u8(value, "table", &fmr->table_id);
1767 } else if (!strcmp(name, "out_port")) {
1768 fmr->out_port = u16_to_ofp(atoi(value));
1769 } else if (mf_from_name(name)) {
1772 error = parse_field(mf_from_name(name), value, &fmr->match,
1778 return xasprintf("%s: unknown keyword %s", str_, name);
1785 /* Convert 'str_' (as described in the documentation for the "monitor" command
1786 * in the ovs-ofctl man page) into 'fmr'.
1788 * Returns NULL if successful, otherwise a malloc()'d string describing the
1789 * error. The caller is responsible for freeing the returned string. */
1790 char * WARN_UNUSED_RESULT
1791 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
1793 enum ofputil_protocol *usable_protocols)
1795 char *string = xstrdup(str_);
1796 char *error = parse_flow_monitor_request__(fmr, str_, string,
1802 /* Parses 's' as a set of OpenFlow actions and appends the actions to
1805 * Returns NULL if successful, otherwise a malloc()'d string describing the
1806 * error. The caller is responsible for freeing the returned string. */
1807 char * WARN_UNUSED_RESULT
1808 parse_ofpacts(const char *s_, struct ofpbuf *ofpacts,
1809 enum ofputil_protocol *usable_protocols)
1811 char *s = xstrdup(s_);
1814 *usable_protocols = OFPUTIL_P_ANY;
1816 error = str_to_ofpacts(s, ofpacts, usable_protocols);
1822 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
1823 * (one of OFPFC_*) into 'fm'.
1825 * Returns NULL if successful, otherwise a malloc()'d string describing the
1826 * error. The caller is responsible for freeing the returned string. */
1827 char * WARN_UNUSED_RESULT
1828 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
1830 enum ofputil_protocol *usable_protocols)
1832 char *error = parse_ofp_str(fm, command, string, usable_protocols);
1834 /* Normalize a copy of the match. This ensures that non-normalized
1835 * flows get logged but doesn't affect what gets sent to the switch, so
1836 * that the switch can do whatever it likes with the flow. */
1837 struct match match_copy = fm->match;
1838 ofputil_normalize_match(&match_copy);
1844 /* Convert 'table_id' and 'flow_miss_handling' (as described for the
1845 * "mod-table" command in the ovs-ofctl man page) into 'tm' for sending the
1846 * specified table_mod 'command' to a switch.
1848 * Returns NULL if successful, otherwise a malloc()'d string describing the
1849 * error. The caller is responsible for freeing the returned string. */
1850 char * WARN_UNUSED_RESULT
1851 parse_ofp_table_mod(struct ofputil_table_mod *tm, const char *table_id,
1852 const char *flow_miss_handling,
1853 enum ofputil_protocol *usable_protocols)
1855 /* Table mod requires at least OF 1.1. */
1856 *usable_protocols = OFPUTIL_P_OF11_UP;
1858 if (!strcasecmp(table_id, "all")) {
1859 tm->table_id = OFPTT_ALL;
1861 char *error = str_to_u8(table_id, "table_id", &tm->table_id);
1867 if (strcmp(flow_miss_handling, "controller") == 0) {
1868 tm->miss_config = OFPUTIL_TABLE_MISS_CONTROLLER;
1869 } else if (strcmp(flow_miss_handling, "continue") == 0) {
1870 tm->miss_config = OFPUTIL_TABLE_MISS_CONTINUE;
1871 } else if (strcmp(flow_miss_handling, "drop") == 0) {
1872 tm->miss_config = OFPUTIL_TABLE_MISS_DROP;
1874 return xasprintf("invalid flow_miss_handling %s", flow_miss_handling);
1877 if (tm->table_id == 0xfe
1878 && tm->miss_config == OFPUTIL_TABLE_MISS_CONTINUE) {
1879 return xstrdup("last table's flow miss handling can not be continue");
1886 /* Opens file 'file_name' and reads each line as a flow_mod of the specified
1887 * type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
1888 * on the caller's behalf, and the number of flow_mods in '*n_fms'.
1890 * Returns NULL if successful, otherwise a malloc()'d string describing the
1891 * error. The caller is responsible for freeing the returned string. */
1892 char * WARN_UNUSED_RESULT
1893 parse_ofp_flow_mod_file(const char *file_name, uint16_t command,
1894 struct ofputil_flow_mod **fms, size_t *n_fms,
1895 enum ofputil_protocol *usable_protocols)
1897 size_t allocated_fms;
1902 *usable_protocols = OFPUTIL_P_ANY;
1907 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1908 if (stream == NULL) {
1909 return xasprintf("%s: open failed (%s)",
1910 file_name, ovs_strerror(errno));
1913 allocated_fms = *n_fms;
1916 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
1918 enum ofputil_protocol usable;
1920 if (*n_fms >= allocated_fms) {
1921 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
1923 error = parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command,
1928 for (i = 0; i < *n_fms; i++) {
1929 free(CONST_CAST(struct ofpact *, (*fms)[i].ofpacts));
1936 if (stream != stdin) {
1940 return xasprintf("%s:%d: %s", file_name, line_number, error);
1942 *usable_protocols &= usable; /* Each line can narrow the set. */
1947 if (stream != stdin) {
1953 char * WARN_UNUSED_RESULT
1954 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1955 bool aggregate, const char *string,
1956 enum ofputil_protocol *usable_protocols)
1958 struct ofputil_flow_mod fm;
1961 error = parse_ofp_str(&fm, -1, string, usable_protocols);
1966 /* Special table ID support not required for stats requests. */
1967 if (*usable_protocols & OFPUTIL_P_OF10_STD_TID) {
1968 *usable_protocols |= OFPUTIL_P_OF10_STD;
1970 if (*usable_protocols & OFPUTIL_P_OF10_NXM_TID) {
1971 *usable_protocols |= OFPUTIL_P_OF10_NXM;
1974 fsr->aggregate = aggregate;
1975 fsr->cookie = fm.cookie;
1976 fsr->cookie_mask = fm.cookie_mask;
1977 fsr->match = fm.match;
1978 fsr->out_port = fm.out_port;
1979 fsr->out_group = fm.out_group;
1980 fsr->table_id = fm.table_id;
1984 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1985 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1986 * mf_field. Fields must be specified in a natural order for satisfying
1987 * prerequisites. If 'mask' is specified, fills the mask field for each of the
1988 * field specified in flow. If the map, 'names_portno' is specfied, converts
1989 * the in_port name into port no while setting the 'flow'.
1991 * Returns NULL on success, otherwise a malloc()'d string that explains the
1994 parse_ofp_exact_flow(struct flow *flow, struct flow *mask, const char *s,
1995 const struct simap *portno_names)
1997 char *pos, *key, *value_s;
2001 memset(flow, 0, sizeof *flow);
2003 memset(mask, 0, sizeof *mask);
2006 pos = copy = xstrdup(s);
2007 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
2008 const struct protocol *p;
2009 if (parse_protocol(key, &p)) {
2010 if (flow->dl_type) {
2011 error = xasprintf("%s: Ethernet type set multiple times", s);
2014 flow->dl_type = htons(p->dl_type);
2016 mask->dl_type = OVS_BE16_MAX;
2020 if (flow->nw_proto) {
2021 error = xasprintf("%s: network protocol set "
2022 "multiple times", s);
2025 flow->nw_proto = p->nw_proto;
2027 mask->nw_proto = UINT8_MAX;
2031 const struct mf_field *mf;
2032 union mf_value value;
2035 mf = mf_from_name(key);
2037 error = xasprintf("%s: unknown field %s", s, key);
2041 if (!mf_are_prereqs_ok(mf, flow)) {
2042 error = xasprintf("%s: prerequisites not met for setting %s",
2047 if (!mf_is_zero(mf, flow)) {
2048 error = xasprintf("%s: field %s set multiple times", s, key);
2052 if (!strcmp(key, "in_port")
2054 && simap_contains(portno_names, value_s)) {
2055 flow->in_port.ofp_port = u16_to_ofp(
2056 simap_get(portno_names, value_s));
2058 mask->in_port.ofp_port = u16_to_ofp(ntohs(OVS_BE16_MAX));
2061 field_error = mf_parse_value(mf, value_s, &value);
2063 error = xasprintf("%s: bad value for %s (%s)",
2064 s, key, field_error);
2069 mf_set_flow_value(mf, &value, flow);
2071 mf_mask_field(mf, mask);
2077 if (!flow->in_port.ofp_port) {
2078 flow->in_port.ofp_port = OFPP_NONE;
2085 memset(flow, 0, sizeof *flow);
2087 memset(mask, 0, sizeof *mask);
2093 static char * WARN_UNUSED_RESULT
2094 parse_bucket_str(struct ofputil_bucket *bucket, char *str_,
2095 enum ofputil_protocol *usable_protocols)
2097 struct ofpbuf ofpacts;
2098 char *pos, *act, *arg;
2102 bucket->watch_port = OFPP_ANY;
2103 bucket->watch_group = OFPG11_ANY;
2107 ofpbuf_init(&ofpacts, 64);
2108 while (ofputil_parse_key_value(&pos, &act, &arg)) {
2111 if (!strcasecmp(act, "weight")) {
2112 error = str_to_u16(arg, "weight", &bucket->weight);
2113 } else if (!strcasecmp(act, "watch_port")) {
2114 if (!ofputil_port_from_string(arg, &bucket->watch_port)
2115 || (ofp_to_u16(bucket->watch_port) >= ofp_to_u16(OFPP_MAX)
2116 && bucket->watch_port != OFPP_ANY)) {
2117 error = xasprintf("%s: invalid watch_port", arg);
2119 } else if (!strcasecmp(act, "watch_group")) {
2120 error = str_to_u32(arg, &bucket->watch_group);
2121 if (!error && bucket->watch_group > OFPG_MAX) {
2122 error = xasprintf("invalid watch_group id %"PRIu32,
2123 bucket->watch_group);
2125 } else if (!strcasecmp(act, "actions")) {
2126 if (ofputil_parse_key_value(&arg, &act, &arg)) {
2127 error = str_to_ofpact__(pos, act, arg, &ofpacts, n_actions,
2132 error = str_to_ofpact__(pos, act, arg, &ofpacts, n_actions,
2138 ofpbuf_uninit(&ofpacts);
2143 ofpact_pad(&ofpacts);
2144 bucket->ofpacts = ofpbuf_data(&ofpacts);
2145 bucket->ofpacts_len = ofpbuf_size(&ofpacts);
2150 static char * WARN_UNUSED_RESULT
2151 parse_ofp_group_mod_str__(struct ofputil_group_mod *gm, uint16_t command,
2153 enum ofputil_protocol *usable_protocols)
2156 F_GROUP_TYPE = 1 << 0,
2159 char *save_ptr = NULL;
2160 bool had_type = false;
2162 struct ofputil_bucket *bucket;
2165 *usable_protocols = OFPUTIL_P_OF11_UP;
2169 fields = F_GROUP_TYPE | F_BUCKETS;
2172 case OFPGC11_DELETE:
2176 case OFPGC11_MODIFY:
2177 fields = F_GROUP_TYPE | F_BUCKETS;
2184 memset(gm, 0, sizeof *gm);
2185 gm->command = command;
2186 gm->group_id = OFPG_ANY;
2187 list_init(&gm->buckets);
2188 if (command == OFPGC11_DELETE && string[0] == '\0') {
2189 gm->group_id = OFPG_ALL;
2193 *usable_protocols = OFPUTIL_P_OF11_UP;
2195 if (fields & F_BUCKETS) {
2196 char *bkt_str = strstr(string, "bucket");
2205 bkt_str = strchr(bkt_str + 1, '=');
2207 error = xstrdup("must specify bucket content");
2212 next_bkt_str = strstr(bkt_str, "bucket");
2214 *next_bkt_str = '\0';
2217 bucket = xzalloc(sizeof(struct ofputil_bucket));
2218 error = parse_bucket_str(bucket, bkt_str, usable_protocols);
2223 list_push_back(&gm->buckets, &bucket->list_node);
2225 bkt_str = next_bkt_str;
2229 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
2230 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
2233 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
2235 error = xasprintf("field %s missing value", name);
2239 if (!strcmp(name, "group_id")) {
2240 if(!strcmp(value, "all")) {
2241 gm->group_id = OFPG_ALL;
2243 char *error = str_to_u32(value, &gm->group_id);
2247 if (gm->group_id != OFPG_ALL && gm->group_id > OFPG_MAX) {
2248 error = xasprintf("invalid group id %"PRIu32,
2253 } else if (!strcmp(name, "type")){
2254 if (!(fields & F_GROUP_TYPE)) {
2255 error = xstrdup("type is not needed");
2258 if (!strcmp(value, "all")) {
2259 gm->type = OFPGT11_ALL;
2260 } else if (!strcmp(value, "select")) {
2261 gm->type = OFPGT11_SELECT;
2262 } else if (!strcmp(value, "indirect")) {
2263 gm->type = OFPGT11_INDIRECT;
2264 } else if (!strcmp(value, "ff") ||
2265 !strcmp(value, "fast_failover")) {
2266 gm->type = OFPGT11_FF;
2268 error = xasprintf("invalid group type %s", value);
2272 } else if (!strcmp(name, "bucket")) {
2273 error = xstrdup("bucket is not needed");
2276 error = xasprintf("unknown keyword %s", name);
2280 if (gm->group_id == OFPG_ANY) {
2281 error = xstrdup("must specify a group_id");
2284 if (fields & F_GROUP_TYPE && !had_type) {
2285 error = xstrdup("must specify a type");
2289 /* Validate buckets. */
2290 LIST_FOR_EACH (bucket, list_node, &gm->buckets) {
2291 if (bucket->weight != 1 && gm->type != OFPGT11_SELECT) {
2292 error = xstrdup("Only select groups can have bucket weights.");
2296 if (gm->type == OFPGT11_INDIRECT && !list_is_short(&gm->buckets)) {
2297 error = xstrdup("Indirect groups can have at most one bucket.");
2303 ofputil_bucket_list_destroy(&gm->buckets);
2307 char * WARN_UNUSED_RESULT
2308 parse_ofp_group_mod_str(struct ofputil_group_mod *gm, uint16_t command,
2310 enum ofputil_protocol *usable_protocols)
2312 char *string = xstrdup(str_);
2313 char *error = parse_ofp_group_mod_str__(gm, command, string,
2318 ofputil_bucket_list_destroy(&gm->buckets);
2323 char * WARN_UNUSED_RESULT
2324 parse_ofp_group_mod_file(const char *file_name, uint16_t command,
2325 struct ofputil_group_mod **gms, size_t *n_gms,
2326 enum ofputil_protocol *usable_protocols)
2328 size_t allocated_gms;
2336 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
2337 if (stream == NULL) {
2338 return xasprintf("%s: open failed (%s)",
2339 file_name, ovs_strerror(errno));
2342 allocated_gms = *n_gms;
2345 *usable_protocols = OFPUTIL_P_OF11_UP;
2346 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
2347 enum ofputil_protocol usable;
2350 if (*n_gms >= allocated_gms) {
2353 *gms = x2nrealloc(*gms, &allocated_gms, sizeof **gms);
2354 for (i = 0; i < *n_gms; i++) {
2355 list_moved(&(*gms)[i].buckets);
2358 error = parse_ofp_group_mod_str(&(*gms)[*n_gms], command, ds_cstr(&s),
2363 for (i = 0; i < *n_gms; i++) {
2364 ofputil_bucket_list_destroy(&(*gms)[i].buckets);
2371 if (stream != stdin) {
2375 return xasprintf("%s:%d: %s", file_name, line_number, error);
2377 *usable_protocols &= usable;
2382 if (stream != stdin) {