2 * Copyright (c) 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.
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 (sscanf(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
151 != ETH_ADDR_SCAN_COUNT) {
152 return xasprintf("invalid mac address %s", str);
157 /* Parses 'str' as an IP address into '*ip'.
159 * Returns NULL if successful, otherwise a malloc()'d string describing the
160 * error. The caller is responsible for freeing the returned string. */
161 static char * WARN_UNUSED_RESULT
162 str_to_ip(const char *str, ovs_be32 *ip)
164 struct in_addr in_addr;
166 if (lookup_ip(str, &in_addr)) {
167 return xasprintf("%s: could not convert to IP address", str);
169 *ip = in_addr.s_addr;
173 /* Parses 'arg' as the argument to an "enqueue" action, and appends such an
174 * action to 'ofpacts'.
176 * Returns NULL if successful, otherwise a malloc()'d string describing the
177 * error. The caller is responsible for freeing the returned string. */
178 static char * WARN_UNUSED_RESULT
179 parse_enqueue(char *arg, struct ofpbuf *ofpacts)
182 char *port = strtok_r(arg, ":q", &sp);
183 char *queue = strtok_r(NULL, "", &sp);
184 struct ofpact_enqueue *enqueue;
186 if (port == NULL || queue == NULL) {
187 return xstrdup("\"enqueue\" syntax is \"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 output->max_len = output->port == OFPP_CONTROLLER ? UINT16_MAX : 0;
216 if (!ofputil_port_from_string(arg, &output->port)) {
217 return xasprintf("%s: output to unknown port", arg);
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);
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 ids = 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_ttl" action, and appends such an
442 * action to 'ofpacts'.
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_ttl(struct ofpbuf *b, const char *arg)
449 struct ofpact_mpls_ttl *mpls_ttl = ofpact_put_SET_MPLS_TTL(b);
452 return xstrdup("parse_set_mpls_ttl: expected ttl.");
455 mpls_ttl->ttl = atoi(arg);
459 /* Parses a "set_field" action with argument 'arg', appending the parsed
460 * action to 'ofpacts'.
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 set_field_parse__(char *arg, struct ofpbuf *ofpacts,
466 enum ofputil_protocol *usable_protocols)
468 struct ofpact_reg_load *load = ofpact_put_REG_LOAD(ofpacts);
472 const struct mf_field *mf;
474 union mf_value mf_value;
477 delim = strstr(arg, "->");
479 return xasprintf("%s: missing `->'", arg);
481 if (strlen(delim) <= strlen("->")) {
482 return xasprintf("%s: missing field name following `->'", arg);
485 key = delim + strlen("->");
486 mf = mf_from_name(key);
488 return xasprintf("%s is not a valid OXM field name", key);
491 return xasprintf("%s is read-only", key);
495 error = mf_parse_value(mf, value, &mf_value);
499 if (!mf_is_value_valid(mf, &mf_value)) {
500 return xasprintf("%s is not a valid value for field %s", value, key);
502 ofpact_set_field_init(load, mf, &mf_value);
504 *usable_protocols &= mf->usable_protocols;
508 /* Parses 'arg' as the argument to a "set_field" action, and appends such an
509 * action to 'ofpacts'.
511 * Returns NULL if successful, otherwise a malloc()'d string describing the
512 * error. The caller is responsible for freeing the returned string. */
513 static char * WARN_UNUSED_RESULT
514 set_field_parse(const char *arg, struct ofpbuf *ofpacts,
515 enum ofputil_protocol *usable_protocols)
517 char *copy = xstrdup(arg);
518 char *error = set_field_parse__(copy, ofpacts, usable_protocols);
523 /* Parses 'arg' as the argument to a "write_metadata" instruction, and appends
524 * such an action to 'ofpacts'.
526 * Returns NULL if successful, otherwise a malloc()'d string describing the
527 * error. The caller is responsible for freeing the returned string. */
528 static char * WARN_UNUSED_RESULT
529 parse_metadata(struct ofpbuf *b, char *arg)
531 struct ofpact_metadata *om;
532 char *mask = strchr(arg, '/');
534 om = ofpact_put_WRITE_METADATA(b);
540 error = str_to_be64(mask + 1, &om->mask);
545 om->mask = OVS_BE64_MAX;
548 return str_to_be64(arg, &om->metadata);
551 /* Parses 'arg' as the argument to a "sample" action, and appends such an
552 * action to 'ofpacts'.
554 * Returns NULL if successful, otherwise a malloc()'d string describing the
555 * error. The caller is responsible for freeing the returned string. */
556 static char * WARN_UNUSED_RESULT
557 parse_sample(struct ofpbuf *b, char *arg)
559 struct ofpact_sample *os = ofpact_put_SAMPLE(b);
562 while (ofputil_parse_key_value(&arg, &key, &value)) {
565 if (!strcmp(key, "probability")) {
566 error = str_to_u16(value, "probability", &os->probability);
567 if (!error && os->probability == 0) {
568 error = xasprintf("invalid probability value \"%s\"", value);
570 } else if (!strcmp(key, "collector_set_id")) {
571 error = str_to_u32(value, &os->collector_set_id);
572 } else if (!strcmp(key, "obs_domain_id")) {
573 error = str_to_u32(value, &os->obs_domain_id);
574 } else if (!strcmp(key, "obs_point_id")) {
575 error = str_to_u32(value, &os->obs_point_id);
577 error = xasprintf("invalid key \"%s\" in \"sample\" argument",
584 if (os->probability == 0) {
585 return xstrdup("non-zero \"probability\" must be specified on sample");
590 /* Parses 'arg' as the argument to action 'code', and appends such an action to
593 * Returns NULL if successful, otherwise a malloc()'d string describing the
594 * error. The caller is responsible for freeing the returned string. */
595 static char * WARN_UNUSED_RESULT
596 parse_named_action(enum ofputil_action_code code,
597 char *arg, struct ofpbuf *ofpacts,
598 enum ofputil_protocol *usable_protocols)
600 size_t orig_size = ofpacts->size;
601 struct ofpact_tunnel *tunnel;
603 uint16_t ethertype = 0;
605 uint8_t tos = 0, ecn;
609 case OFPUTIL_ACTION_INVALID:
612 case OFPUTIL_OFPAT10_OUTPUT:
613 case OFPUTIL_OFPAT11_OUTPUT:
614 error = parse_output(arg, ofpacts);
617 case OFPUTIL_OFPAT10_SET_VLAN_VID:
618 case OFPUTIL_OFPAT11_SET_VLAN_VID:
619 error = str_to_u16(arg, "VLAN VID", &vid);
624 if (vid & ~VLAN_VID_MASK) {
625 return xasprintf("%s: not a valid VLAN VID", arg);
627 ofpact_put_SET_VLAN_VID(ofpacts)->vlan_vid = vid;
630 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
631 case OFPUTIL_OFPAT11_SET_VLAN_PCP:
632 error = str_to_u8(arg, "VLAN PCP", &pcp);
638 return xasprintf("%s: not a valid VLAN PCP", arg);
640 ofpact_put_SET_VLAN_PCP(ofpacts)->vlan_pcp = pcp;
643 case OFPUTIL_OFPAT12_SET_FIELD:
644 return set_field_parse(arg, ofpacts, usable_protocols);
646 case OFPUTIL_OFPAT10_STRIP_VLAN:
647 case OFPUTIL_OFPAT11_POP_VLAN:
648 ofpact_put_STRIP_VLAN(ofpacts);
651 case OFPUTIL_OFPAT11_PUSH_VLAN:
652 *usable_protocols &= OFPUTIL_P_OF11_UP;
653 error = str_to_u16(arg, "ethertype", ðertype);
658 if (ethertype != ETH_TYPE_VLAN_8021Q) {
659 /* XXX ETH_TYPE_VLAN_8021AD case isn't supported */
660 return xasprintf("%s: not a valid VLAN ethertype", arg);
663 ofpact_put_PUSH_VLAN(ofpacts);
666 case OFPUTIL_OFPAT11_SET_QUEUE:
667 error = str_to_u32(arg, &ofpact_put_SET_QUEUE(ofpacts)->queue_id);
670 case OFPUTIL_OFPAT10_SET_DL_SRC:
671 case OFPUTIL_OFPAT11_SET_DL_SRC:
672 error = str_to_mac(arg, ofpact_put_SET_ETH_SRC(ofpacts)->mac);
675 case OFPUTIL_OFPAT10_SET_DL_DST:
676 case OFPUTIL_OFPAT11_SET_DL_DST:
677 error = str_to_mac(arg, ofpact_put_SET_ETH_DST(ofpacts)->mac);
680 case OFPUTIL_OFPAT10_SET_NW_SRC:
681 case OFPUTIL_OFPAT11_SET_NW_SRC:
682 error = str_to_ip(arg, &ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4);
685 case OFPUTIL_OFPAT10_SET_NW_DST:
686 case OFPUTIL_OFPAT11_SET_NW_DST:
687 error = str_to_ip(arg, &ofpact_put_SET_IPV4_DST(ofpacts)->ipv4);
690 case OFPUTIL_OFPAT10_SET_NW_TOS:
691 case OFPUTIL_OFPAT11_SET_NW_TOS:
692 error = str_to_u8(arg, "TOS", &tos);
697 if (tos & ~IP_DSCP_MASK) {
698 return xasprintf("%s: not a valid TOS", arg);
700 ofpact_put_SET_IP_DSCP(ofpacts)->dscp = tos;
703 case OFPUTIL_OFPAT11_SET_NW_ECN:
704 error = str_to_u8(arg, "ECN", &ecn);
709 if (ecn & ~IP_ECN_MASK) {
710 return xasprintf("%s: not a valid ECN", arg);
712 ofpact_put_SET_IP_ECN(ofpacts)->ecn = ecn;
715 case OFPUTIL_OFPAT11_DEC_NW_TTL:
718 case OFPUTIL_OFPAT10_SET_TP_SRC:
719 case OFPUTIL_OFPAT11_SET_TP_SRC:
720 error = str_to_u16(arg, "source port",
721 &ofpact_put_SET_L4_SRC_PORT(ofpacts)->port);
724 case OFPUTIL_OFPAT10_SET_TP_DST:
725 case OFPUTIL_OFPAT11_SET_TP_DST:
726 error = str_to_u16(arg, "destination port",
727 &ofpact_put_SET_L4_DST_PORT(ofpacts)->port);
730 case OFPUTIL_OFPAT10_ENQUEUE:
731 error = parse_enqueue(arg, ofpacts);
734 case OFPUTIL_NXAST_RESUBMIT:
735 error = parse_resubmit(arg, ofpacts);
738 case OFPUTIL_NXAST_SET_TUNNEL:
739 case OFPUTIL_NXAST_SET_TUNNEL64:
740 tunnel = ofpact_put_SET_TUNNEL(ofpacts);
741 tunnel->ofpact.compat = code;
742 error = str_to_u64(arg, &tunnel->tun_id);
745 case OFPUTIL_NXAST_WRITE_METADATA:
746 error = parse_metadata(ofpacts, arg);
749 case OFPUTIL_NXAST_SET_QUEUE:
750 error = str_to_u32(arg, &ofpact_put_SET_QUEUE(ofpacts)->queue_id);
753 case OFPUTIL_NXAST_POP_QUEUE:
754 ofpact_put_POP_QUEUE(ofpacts);
757 case OFPUTIL_NXAST_REG_MOVE:
758 error = nxm_parse_reg_move(ofpact_put_REG_MOVE(ofpacts), arg);
761 case OFPUTIL_NXAST_REG_LOAD:
762 error = nxm_parse_reg_load(ofpact_put_REG_LOAD(ofpacts), arg);
765 case OFPUTIL_NXAST_NOTE:
766 error = parse_note(arg, ofpacts);
769 case OFPUTIL_NXAST_MULTIPATH:
770 error = multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg);
773 case OFPUTIL_NXAST_BUNDLE:
774 error = bundle_parse(arg, ofpacts);
777 case OFPUTIL_NXAST_BUNDLE_LOAD:
778 error = bundle_parse_load(arg, ofpacts);
781 case OFPUTIL_NXAST_RESUBMIT_TABLE:
782 case OFPUTIL_NXAST_OUTPUT_REG:
783 case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
786 case OFPUTIL_NXAST_LEARN:
787 error = learn_parse(arg, ofpacts);
790 case OFPUTIL_NXAST_EXIT:
791 ofpact_put_EXIT(ofpacts);
794 case OFPUTIL_NXAST_DEC_TTL:
795 error = parse_dec_ttl(ofpacts, arg);
798 case OFPUTIL_NXAST_SET_MPLS_TTL:
799 case OFPUTIL_OFPAT11_SET_MPLS_TTL:
800 error = parse_set_mpls_ttl(ofpacts, arg);
803 case OFPUTIL_OFPAT11_DEC_MPLS_TTL:
804 case OFPUTIL_NXAST_DEC_MPLS_TTL:
805 ofpact_put_DEC_MPLS_TTL(ofpacts);
808 case OFPUTIL_NXAST_FIN_TIMEOUT:
809 error = parse_fin_timeout(ofpacts, arg);
812 case OFPUTIL_NXAST_CONTROLLER:
813 error = parse_controller(ofpacts, arg);
816 case OFPUTIL_OFPAT11_PUSH_MPLS:
817 case OFPUTIL_NXAST_PUSH_MPLS:
818 error = str_to_u16(arg, "push_mpls", ðertype);
820 ofpact_put_PUSH_MPLS(ofpacts)->ethertype = htons(ethertype);
824 case OFPUTIL_OFPAT11_POP_MPLS:
825 case OFPUTIL_NXAST_POP_MPLS:
826 error = str_to_u16(arg, "pop_mpls", ðertype);
828 ofpact_put_POP_MPLS(ofpacts)->ethertype = htons(ethertype);
832 case OFPUTIL_OFPAT11_GROUP:
833 error = str_to_u32(arg, &ofpact_put_GROUP(ofpacts)->group_id);
836 case OFPUTIL_NXAST_STACK_PUSH:
837 error = nxm_parse_stack_action(ofpact_put_STACK_PUSH(ofpacts), arg);
839 case OFPUTIL_NXAST_STACK_POP:
840 error = nxm_parse_stack_action(ofpact_put_STACK_POP(ofpacts), arg);
843 case OFPUTIL_NXAST_SAMPLE:
844 error = parse_sample(ofpacts, arg);
849 ofpacts->size = orig_size;
854 /* Parses action 'act', with argument 'arg', and appends a parsed version to
857 * 'n_actions' specifies the number of actions already parsed (for proper
858 * handling of "drop" actions).
860 * Returns NULL if successful, otherwise a malloc()'d string describing the
861 * error. The caller is responsible for freeing the returned string. */
862 static char * WARN_UNUSED_RESULT
863 str_to_ofpact__(char *pos, char *act, char *arg,
864 struct ofpbuf *ofpacts, int n_actions,
865 enum ofputil_protocol *usable_protocols)
867 int code = ofputil_action_code_from_name(act);
869 return parse_named_action(code, arg, ofpacts, usable_protocols);
870 } else if (!strcasecmp(act, "drop")) {
872 return xstrdup("Drop actions must not be preceded by other "
874 } else if (ofputil_parse_key_value(&pos, &act, &arg)) {
875 return xstrdup("Drop actions must not be followed by other "
880 if (ofputil_port_from_string(act, &port)) {
881 ofpact_put_OUTPUT(ofpacts)->port = port;
883 return xasprintf("Unknown action: %s", act);
890 /* Parses 'str' as a series of actions, and appends them to 'ofpacts'.
892 * Returns NULL if successful, otherwise a malloc()'d string describing the
893 * error. The caller is responsible for freeing the returned string. */
894 static char * WARN_UNUSED_RESULT
895 str_to_ofpacts__(char *str, struct ofpbuf *ofpacts,
896 enum ofputil_protocol *usable_protocols)
898 size_t orig_size = ofpacts->size;
899 char *pos, *act, *arg;
904 while (ofputil_parse_key_value(&pos, &act, &arg)) {
905 char *error = str_to_ofpact__(pos, act, arg, ofpacts, n_actions,
908 ofpacts->size = orig_size;
919 /* Parses 'str' as a series of actions, and appends them to 'ofpacts'.
921 * Returns NULL if successful, otherwise a malloc()'d string describing the
922 * error. The caller is responsible for freeing the returned string. */
923 static char * WARN_UNUSED_RESULT
924 str_to_ofpacts(char *str, struct ofpbuf *ofpacts,
925 enum ofputil_protocol *usable_protocols)
927 size_t orig_size = ofpacts->size;
931 error_s = str_to_ofpacts__(str, ofpacts, usable_protocols);
936 error = ofpacts_verify(ofpacts->data, ofpacts->size);
938 ofpacts->size = orig_size;
939 return xstrdup("Incorrect action ordering");
945 /* Parses 'arg' as the argument to instruction 'type', and appends such an
946 * instruction to 'ofpacts'.
948 * Returns NULL if successful, otherwise a malloc()'d string describing the
949 * error. The caller is responsible for freeing the returned string. */
950 static char * WARN_UNUSED_RESULT
951 parse_named_instruction(enum ovs_instruction_type type,
952 char *arg, struct ofpbuf *ofpacts,
953 enum ofputil_protocol *usable_protocols)
955 char *error_s = NULL;
958 *usable_protocols &= OFPUTIL_P_OF11_UP;
961 case OVSINST_OFPIT11_APPLY_ACTIONS:
962 NOT_REACHED(); /* This case is handled by str_to_inst_ofpacts() */
965 case OVSINST_OFPIT11_WRITE_ACTIONS: {
966 struct ofpact_nest *on;
971 on = ofpact_put(ofpacts, OFPACT_WRITE_ACTIONS,
972 offsetof(struct ofpact_nest, actions));
973 error_s = str_to_ofpacts__(arg, ofpacts, usable_protocols);
975 on = ofpbuf_at_assert(ofpacts, ofs, sizeof *on);
976 on->ofpact.len = ofpacts->size - ofs;
984 case OVSINST_OFPIT11_CLEAR_ACTIONS:
985 ofpact_put_CLEAR_ACTIONS(ofpacts);
988 case OVSINST_OFPIT13_METER:
989 *usable_protocols &= OFPUTIL_P_OF13_UP;
990 error_s = str_to_u32(arg, &ofpact_put_METER(ofpacts)->meter_id);
993 case OVSINST_OFPIT11_WRITE_METADATA:
994 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
995 error_s = parse_metadata(ofpacts, arg);
998 case OVSINST_OFPIT11_GOTO_TABLE: {
999 struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts);
1000 char *table_s = strsep(&arg, ",");
1001 if (!table_s || !table_s[0]) {
1002 return xstrdup("instruction goto-table needs table id");
1004 error_s = str_to_u8(table_s, "table", &ogt->table_id);
1013 /* If write_metadata is specified as an action AND an instruction, ofpacts
1014 could be invalid. */
1015 error = ofpacts_verify(ofpacts->data, ofpacts->size);
1017 return xstrdup("Incorrect instruction ordering");
1022 /* Parses 'str' as a series of instructions, and appends them to 'ofpacts'.
1024 * Returns NULL if successful, otherwise a malloc()'d string describing the
1025 * error. The caller is responsible for freeing the returned string. */
1026 static char * WARN_UNUSED_RESULT
1027 str_to_inst_ofpacts(char *str, struct ofpbuf *ofpacts,
1028 enum ofputil_protocol *usable_protocols)
1030 size_t orig_size = ofpacts->size;
1031 char *pos, *inst, *arg;
1033 const char *prev_inst = NULL;
1038 while (ofputil_parse_key_value(&pos, &inst, &arg)) {
1039 type = ovs_instruction_type_from_name(inst);
1041 char *error = str_to_ofpact__(pos, inst, arg, ofpacts, n_actions,
1044 ofpacts->size = orig_size;
1048 type = OVSINST_OFPIT11_APPLY_ACTIONS;
1049 if (prev_type == type) {
1053 } else if (type == OVSINST_OFPIT11_APPLY_ACTIONS) {
1054 ofpacts->size = orig_size;
1055 return xasprintf("%s isn't supported. Just write actions then "
1056 "it is interpreted as apply_actions", inst);
1058 char *error = parse_named_instruction(type, arg, ofpacts,
1061 ofpacts->size = orig_size;
1066 if (type <= prev_type) {
1067 ofpacts->size = orig_size;
1068 if (type == prev_type) {
1069 return xasprintf("instruction %s may be specified only once",
1072 return xasprintf("instruction %s must be specified before %s",
1081 ofpact_pad(ofpacts);
1093 parse_protocol(const char *name, const struct protocol **p_out)
1095 static const struct protocol protocols[] = {
1096 { "ip", ETH_TYPE_IP, 0 },
1097 { "arp", ETH_TYPE_ARP, 0 },
1098 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
1099 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
1100 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
1101 { "sctp", ETH_TYPE_IP, IPPROTO_SCTP },
1102 { "ipv6", ETH_TYPE_IPV6, 0 },
1103 { "ip6", ETH_TYPE_IPV6, 0 },
1104 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
1105 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
1106 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
1107 { "sctp6", ETH_TYPE_IPV6, IPPROTO_SCTP },
1108 { "rarp", ETH_TYPE_RARP, 0},
1109 { "mpls", ETH_TYPE_MPLS, 0 },
1110 { "mplsm", ETH_TYPE_MPLS_MCAST, 0 },
1112 const struct protocol *p;
1114 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
1115 if (!strcmp(p->name, name)) {
1124 /* Parses 's' as the (possibly masked) value of field 'mf', and updates
1125 * 'match' appropriately. Restricts the set of usable protocols to ones
1126 * supporting the parsed field.
1128 * Returns NULL if successful, otherwise a malloc()'d string describing the
1129 * error. The caller is responsible for freeing the returned string. */
1130 static char * WARN_UNUSED_RESULT
1131 parse_field(const struct mf_field *mf, const char *s, struct match *match,
1132 enum ofputil_protocol *usable_protocols)
1134 union mf_value value, mask;
1137 error = mf_parse(mf, s, &value, &mask);
1139 *usable_protocols &= mf_set(mf, &value, &mask, match);
1144 static char * WARN_UNUSED_RESULT
1145 parse_ofp_str__(struct ofputil_flow_mod *fm, int command, char *string,
1146 enum ofputil_protocol *usable_protocols)
1149 F_OUT_PORT = 1 << 0,
1152 F_PRIORITY = 1 << 4,
1155 char *save_ptr = NULL;
1156 char *act_str = NULL;
1159 *usable_protocols = OFPUTIL_P_ANY;
1163 fields = F_OUT_PORT;
1167 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
1171 fields = F_OUT_PORT;
1174 case OFPFC_DELETE_STRICT:
1175 fields = F_OUT_PORT | F_PRIORITY;
1179 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
1182 case OFPFC_MODIFY_STRICT:
1183 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
1190 match_init_catchall(&fm->match);
1191 fm->priority = OFP_DEFAULT_PRIORITY;
1192 fm->cookie = htonll(0);
1193 fm->cookie_mask = htonll(0);
1194 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
1195 /* For modify, by default, don't update the cookie. */
1196 fm->new_cookie = OVS_BE64_MAX;
1198 fm->new_cookie = htonll(0);
1200 fm->modify_cookie = false;
1201 fm->table_id = 0xff;
1202 fm->command = command;
1203 fm->idle_timeout = OFP_FLOW_PERMANENT;
1204 fm->hard_timeout = OFP_FLOW_PERMANENT;
1205 fm->buffer_id = UINT32_MAX;
1206 fm->out_port = OFPP_ANY;
1208 fm->out_group = OFPG11_ANY;
1209 if (fields & F_ACTIONS) {
1210 act_str = strstr(string, "action");
1212 return xstrdup("must specify an action");
1216 act_str = strchr(act_str + 1, '=');
1218 return xstrdup("must specify an action");
1223 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1224 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1225 const struct protocol *p;
1228 if (parse_protocol(name, &p)) {
1229 match_set_dl_type(&fm->match, htons(p->dl_type));
1231 match_set_nw_proto(&fm->match, p->nw_proto);
1233 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
1234 fm->flags |= OFPUTIL_FF_SEND_FLOW_REM;
1235 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
1236 fm->flags |= OFPUTIL_FF_CHECK_OVERLAP;
1237 } else if (fields & F_FLAGS && !strcmp(name, "reset_counts")) {
1238 fm->flags |= OFPUTIL_FF_RESET_COUNTS;
1239 *usable_protocols &= OFPUTIL_P_OF12_UP;
1240 } else if (fields & F_FLAGS && !strcmp(name, "no_packet_counts")) {
1241 fm->flags |= OFPUTIL_FF_NO_PKT_COUNTS;
1242 *usable_protocols &= OFPUTIL_P_OF13_UP;
1243 } else if (fields & F_FLAGS && !strcmp(name, "no_byte_counts")) {
1244 fm->flags |= OFPUTIL_FF_NO_BYT_COUNTS;
1245 *usable_protocols &= OFPUTIL_P_OF13_UP;
1249 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1251 return xasprintf("field %s missing value", name);
1254 if (!strcmp(name, "table")) {
1255 error = str_to_u8(value, "table", &fm->table_id);
1256 if (fm->table_id != 0xff) {
1257 *usable_protocols &= OFPUTIL_P_TID;
1259 } else if (!strcmp(name, "out_port")) {
1260 if (!ofputil_port_from_string(value, &fm->out_port)) {
1261 error = xasprintf("%s is not a valid OpenFlow port",
1264 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
1265 uint16_t priority = 0;
1267 error = str_to_u16(value, name, &priority);
1268 fm->priority = priority;
1269 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
1270 error = str_to_u16(value, name, &fm->idle_timeout);
1271 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
1272 error = str_to_u16(value, name, &fm->hard_timeout);
1273 } else if (!strcmp(name, "cookie")) {
1274 char *mask = strchr(value, '/');
1277 /* A mask means we're searching for a cookie. */
1278 if (command == OFPFC_ADD) {
1279 return xstrdup("flow additions cannot use "
1283 error = str_to_be64(value, &fm->cookie);
1287 error = str_to_be64(mask + 1, &fm->cookie_mask);
1289 /* Matching of the cookie is only supported through NXM or
1291 if (fm->cookie_mask != htonll(0)) {
1292 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
1295 /* No mask means that the cookie is being set. */
1296 if (command != OFPFC_ADD && command != OFPFC_MODIFY
1297 && command != OFPFC_MODIFY_STRICT) {
1298 return xstrdup("cannot set cookie");
1300 error = str_to_be64(value, &fm->new_cookie);
1301 fm->modify_cookie = true;
1303 } else if (mf_from_name(name)) {
1304 error = parse_field(mf_from_name(name), value, &fm->match,
1306 } else if (!strcmp(name, "duration")
1307 || !strcmp(name, "n_packets")
1308 || !strcmp(name, "n_bytes")
1309 || !strcmp(name, "idle_age")
1310 || !strcmp(name, "hard_age")) {
1311 /* Ignore these, so that users can feed the output of
1312 * "ovs-ofctl dump-flows" back into commands that parse
1315 error = xasprintf("unknown keyword %s", name);
1323 /* Check for usable protocol interdependencies between match fields. */
1324 if (fm->match.flow.dl_type == htons(ETH_TYPE_IPV6)) {
1325 const struct flow_wildcards *wc = &fm->match.wc;
1326 /* Only NXM and OXM support matching L3 and L4 fields within IPv6.
1328 * (IPv6 specific fields as well as arp_sha, arp_tha, nw_frag, and
1329 * nw_ttl are covered elsewhere so they don't need to be included in
1332 if (wc->masks.nw_proto || wc->masks.nw_tos
1333 || wc->masks.tp_src || wc->masks.tp_dst) {
1334 *usable_protocols &= OFPUTIL_P_NXM_OXM_ANY;
1337 if (!fm->cookie_mask && fm->new_cookie == OVS_BE64_MAX
1338 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
1339 /* On modifies without a mask, we are supposed to add a flow if
1340 * one does not exist. If a cookie wasn't been specified, use a
1341 * default of zero. */
1342 fm->new_cookie = htonll(0);
1344 if (fields & F_ACTIONS) {
1345 struct ofpbuf ofpacts;
1348 ofpbuf_init(&ofpacts, 32);
1349 error = str_to_inst_ofpacts(act_str, &ofpacts, usable_protocols);
1353 err = ofpacts_check(ofpacts.data, ofpacts.size, &fm->match.flow,
1356 error = xasprintf("actions are invalid with specified match "
1357 "(%s)", ofperr_to_string(err));
1361 ofpbuf_uninit(&ofpacts);
1365 fm->ofpacts_len = ofpacts.size;
1366 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
1368 fm->ofpacts_len = 0;
1375 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
1376 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
1377 * Returns the set of usable protocols in '*usable_protocols'.
1379 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
1380 * constant for 'command'. To parse syntax for an OFPST_FLOW or
1381 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'.
1383 * Returns NULL if successful, otherwise a malloc()'d string describing the
1384 * error. The caller is responsible for freeing the returned string. */
1385 char * WARN_UNUSED_RESULT
1386 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
1387 enum ofputil_protocol *usable_protocols)
1389 char *string = xstrdup(str_);
1392 error = parse_ofp_str__(fm, command, string, usable_protocols);
1395 fm->ofpacts_len = 0;
1402 static char * WARN_UNUSED_RESULT
1403 parse_ofp_meter_mod_str__(struct ofputil_meter_mod *mm, char *string,
1404 struct ofpbuf *bands, int command,
1405 enum ofputil_protocol *usable_protocols)
1412 char *save_ptr = NULL;
1413 char *band_str = NULL;
1416 /* Meters require at least OF 1.3. */
1417 *usable_protocols = OFPUTIL_P_OF13_UP;
1425 fields = F_METER | F_FLAGS | F_BANDS;
1428 case OFPMC13_DELETE:
1432 case OFPMC13_MODIFY:
1433 fields = F_METER | F_FLAGS | F_BANDS;
1440 mm->command = command;
1441 mm->meter.meter_id = 0;
1442 mm->meter.flags = 0;
1443 if (fields & F_BANDS) {
1444 band_str = strstr(string, "band");
1446 return xstrdup("must specify bands");
1450 band_str = strchr(band_str + 1, '=');
1452 return xstrdup("must specify bands");
1457 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1458 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1460 if (fields & F_FLAGS && !strcmp(name, "kbps")) {
1461 mm->meter.flags |= OFPMF13_KBPS;
1462 } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
1463 mm->meter.flags |= OFPMF13_PKTPS;
1464 } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
1465 mm->meter.flags |= OFPMF13_BURST;
1466 } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
1467 mm->meter.flags |= OFPMF13_STATS;
1471 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1473 return xasprintf("field %s missing value", name);
1476 if (!strcmp(name, "meter")) {
1477 if (!strcmp(value, "all")) {
1478 mm->meter.meter_id = OFPM13_ALL;
1479 } else if (!strcmp(value, "controller")) {
1480 mm->meter.meter_id = OFPM13_CONTROLLER;
1481 } else if (!strcmp(value, "slowpath")) {
1482 mm->meter.meter_id = OFPM13_SLOWPATH;
1484 char *error = str_to_u32(value, &mm->meter.meter_id);
1488 if (mm->meter.meter_id > OFPM13_MAX) {
1489 return xasprintf("invalid value for %s", name);
1493 return xasprintf("unknown keyword %s", name);
1497 if (fields & F_METER && !mm->meter.meter_id) {
1498 return xstrdup("must specify 'meter'");
1500 if (fields & F_FLAGS && !mm->meter.flags) {
1501 return xstrdup("meter must specify either 'kbps' or 'pktps'");
1504 if (fields & F_BANDS) {
1505 uint16_t n_bands = 0;
1506 struct ofputil_meter_band *band = NULL;
1509 for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
1510 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1514 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1516 return xasprintf("field %s missing value", name);
1519 if (!strcmp(name, "type")) {
1520 /* Start a new band */
1521 band = ofpbuf_put_zeros(bands, sizeof *band);
1524 if (!strcmp(value, "drop")) {
1525 band->type = OFPMBT13_DROP;
1526 } else if (!strcmp(value, "dscp_remark")) {
1527 band->type = OFPMBT13_DSCP_REMARK;
1529 return xasprintf("field %s unknown value %s", name, value);
1531 } else if (!band || !band->type) {
1532 return xstrdup("band must start with the 'type' keyword");
1533 } else if (!strcmp(name, "rate")) {
1534 char *error = str_to_u32(value, &band->rate);
1538 } else if (!strcmp(name, "burst_size")) {
1539 char *error = str_to_u32(value, &band->burst_size);
1543 } else if (!strcmp(name, "prec_level")) {
1544 char *error = str_to_u8(value, name, &band->prec_level);
1549 return xasprintf("unknown keyword %s", name);
1552 /* validate bands */
1554 return xstrdup("meter must have bands");
1557 mm->meter.n_bands = n_bands;
1558 mm->meter.bands = ofpbuf_steal_data(bands);
1560 for (i = 0; i < n_bands; ++i) {
1561 band = &mm->meter.bands[i];
1564 return xstrdup("band must have 'type'");
1566 if (band->type == OFPMBT13_DSCP_REMARK) {
1567 if (!band->prec_level) {
1568 return xstrdup("'dscp_remark' band must have"
1572 if (band->prec_level) {
1573 return xstrdup("Only 'dscp_remark' band may have"
1578 return xstrdup("band must have 'rate'");
1580 if (mm->meter.flags & OFPMF13_BURST) {
1581 if (!band->burst_size) {
1582 return xstrdup("band must have 'burst_size' "
1583 "when 'burst' flag is set");
1586 if (band->burst_size) {
1587 return xstrdup("band may have 'burst_size' only "
1588 "when 'burst' flag is set");
1593 mm->meter.n_bands = 0;
1594 mm->meter.bands = NULL;
1600 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
1601 * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
1603 * Returns NULL if successful, otherwise a malloc()'d string describing the
1604 * error. The caller is responsible for freeing the returned string. */
1605 char * WARN_UNUSED_RESULT
1606 parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
1607 int command, enum ofputil_protocol *usable_protocols)
1609 struct ofpbuf bands;
1613 ofpbuf_init(&bands, 64);
1614 string = xstrdup(str_);
1616 error = parse_ofp_meter_mod_str__(mm, string, &bands, command,
1620 ofpbuf_uninit(&bands);
1625 static char * WARN_UNUSED_RESULT
1626 parse_flow_monitor_request__(struct ofputil_flow_monitor_request *fmr,
1627 const char *str_, char *string,
1628 enum ofputil_protocol *usable_protocols)
1630 static atomic_uint32_t id = ATOMIC_VAR_INIT(0);
1631 char *save_ptr = NULL;
1634 atomic_add(&id, 1, &fmr->id);
1636 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
1637 | NXFMF_OWN | NXFMF_ACTIONS);
1638 fmr->out_port = OFPP_NONE;
1639 fmr->table_id = 0xff;
1640 match_init_catchall(&fmr->match);
1642 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1643 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1644 const struct protocol *p;
1646 if (!strcmp(name, "!initial")) {
1647 fmr->flags &= ~NXFMF_INITIAL;
1648 } else if (!strcmp(name, "!add")) {
1649 fmr->flags &= ~NXFMF_ADD;
1650 } else if (!strcmp(name, "!delete")) {
1651 fmr->flags &= ~NXFMF_DELETE;
1652 } else if (!strcmp(name, "!modify")) {
1653 fmr->flags &= ~NXFMF_MODIFY;
1654 } else if (!strcmp(name, "!actions")) {
1655 fmr->flags &= ~NXFMF_ACTIONS;
1656 } else if (!strcmp(name, "!own")) {
1657 fmr->flags &= ~NXFMF_OWN;
1658 } else if (parse_protocol(name, &p)) {
1659 match_set_dl_type(&fmr->match, htons(p->dl_type));
1661 match_set_nw_proto(&fmr->match, p->nw_proto);
1666 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1668 return xasprintf("%s: field %s missing value", str_, name);
1671 if (!strcmp(name, "table")) {
1672 char *error = str_to_u8(value, "table", &fmr->table_id);
1676 } else if (!strcmp(name, "out_port")) {
1677 fmr->out_port = u16_to_ofp(atoi(value));
1678 } else if (mf_from_name(name)) {
1681 error = parse_field(mf_from_name(name), value, &fmr->match,
1687 return xasprintf("%s: unknown keyword %s", str_, name);
1694 /* Convert 'str_' (as described in the documentation for the "monitor" command
1695 * in the ovs-ofctl man page) into 'fmr'.
1697 * Returns NULL if successful, otherwise a malloc()'d string describing the
1698 * error. The caller is responsible for freeing the returned string. */
1699 char * WARN_UNUSED_RESULT
1700 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
1702 enum ofputil_protocol *usable_protocols)
1704 char *string = xstrdup(str_);
1705 char *error = parse_flow_monitor_request__(fmr, str_, string,
1711 /* Parses 's' as a set of OpenFlow actions and appends the actions to
1714 * Returns NULL if successful, otherwise a malloc()'d string describing the
1715 * error. The caller is responsible for freeing the returned string. */
1716 char * WARN_UNUSED_RESULT
1717 parse_ofpacts(const char *s_, struct ofpbuf *ofpacts,
1718 enum ofputil_protocol *usable_protocols)
1720 char *s = xstrdup(s_);
1723 *usable_protocols = OFPUTIL_P_ANY;
1725 error = str_to_ofpacts(s, ofpacts, usable_protocols);
1731 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
1732 * (one of OFPFC_*) into 'fm'.
1734 * Returns NULL if successful, otherwise a malloc()'d string describing the
1735 * error. The caller is responsible for freeing the returned string. */
1736 char * WARN_UNUSED_RESULT
1737 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
1739 enum ofputil_protocol *usable_protocols)
1741 char *error = parse_ofp_str(fm, command, string, usable_protocols);
1743 /* Normalize a copy of the match. This ensures that non-normalized
1744 * flows get logged but doesn't affect what gets sent to the switch, so
1745 * that the switch can do whatever it likes with the flow. */
1746 struct match match_copy = fm->match;
1747 ofputil_normalize_match(&match_copy);
1753 /* Convert 'table_id' and 'flow_miss_handling' (as described for the
1754 * "mod-table" command in the ovs-ofctl man page) into 'tm' for sending the
1755 * specified table_mod 'command' to a switch.
1757 * Returns NULL if successful, otherwise a malloc()'d string describing the
1758 * error. The caller is responsible for freeing the returned string. */
1759 char * WARN_UNUSED_RESULT
1760 parse_ofp_table_mod(struct ofputil_table_mod *tm, const char *table_id,
1761 const char *flow_miss_handling,
1762 enum ofputil_protocol *usable_protocols)
1764 /* Table mod requires at least OF 1.1. */
1765 *usable_protocols = OFPUTIL_P_OF11_UP;
1767 if (!strcasecmp(table_id, "all")) {
1770 char *error = str_to_u8(table_id, "table_id", &tm->table_id);
1776 if (strcmp(flow_miss_handling, "controller") == 0) {
1777 tm->config = OFPTC11_TABLE_MISS_CONTROLLER;
1778 } else if (strcmp(flow_miss_handling, "continue") == 0) {
1779 tm->config = OFPTC11_TABLE_MISS_CONTINUE;
1780 } else if (strcmp(flow_miss_handling, "drop") == 0) {
1781 tm->config = OFPTC11_TABLE_MISS_DROP;
1783 return xasprintf("invalid flow_miss_handling %s", flow_miss_handling);
1786 if (tm->table_id == 0xfe && tm->config == OFPTC11_TABLE_MISS_CONTINUE) {
1787 return xstrdup("last table's flow miss handling can not be continue");
1794 /* Opens file 'file_name' and reads each line as a flow_mod of the specified
1795 * type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
1796 * on the caller's behalf, and the number of flow_mods in '*n_fms'.
1798 * Returns NULL if successful, otherwise a malloc()'d string describing the
1799 * error. The caller is responsible for freeing the returned string. */
1800 char * WARN_UNUSED_RESULT
1801 parse_ofp_flow_mod_file(const char *file_name, uint16_t command,
1802 struct ofputil_flow_mod **fms, size_t *n_fms,
1803 enum ofputil_protocol *usable_protocols)
1805 size_t allocated_fms;
1810 *usable_protocols = OFPUTIL_P_ANY;
1815 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1816 if (stream == NULL) {
1817 return xasprintf("%s: open failed (%s)",
1818 file_name, ovs_strerror(errno));
1821 allocated_fms = *n_fms;
1824 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
1826 enum ofputil_protocol usable;
1828 if (*n_fms >= allocated_fms) {
1829 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
1831 error = parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command,
1836 for (i = 0; i < *n_fms; i++) {
1837 free((*fms)[i].ofpacts);
1844 if (stream != stdin) {
1848 return xasprintf("%s:%d: %s", file_name, line_number, error);
1850 *usable_protocols &= usable; /* Each line can narrow the set. */
1855 if (stream != stdin) {
1861 char * WARN_UNUSED_RESULT
1862 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1863 bool aggregate, const char *string,
1864 enum ofputil_protocol *usable_protocols)
1866 struct ofputil_flow_mod fm;
1869 error = parse_ofp_str(&fm, -1, string, usable_protocols);
1874 /* Special table ID support not required for stats requests. */
1875 if (*usable_protocols & OFPUTIL_P_OF10_STD_TID) {
1876 *usable_protocols |= OFPUTIL_P_OF10_STD;
1878 if (*usable_protocols & OFPUTIL_P_OF10_NXM_TID) {
1879 *usable_protocols |= OFPUTIL_P_OF10_NXM;
1882 fsr->aggregate = aggregate;
1883 fsr->cookie = fm.cookie;
1884 fsr->cookie_mask = fm.cookie_mask;
1885 fsr->match = fm.match;
1886 fsr->out_port = fm.out_port;
1887 fsr->out_group = fm.out_group;
1888 fsr->table_id = fm.table_id;
1892 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1893 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1894 * mf_field. Fields must be specified in a natural order for satisfying
1895 * prerequisites. If 'mask' is specified, fills the mask field for each of the
1896 * field specified in flow. If the map, 'names_portno' is specfied, converts
1897 * the in_port name into port no while setting the 'flow'.
1899 * Returns NULL on success, otherwise a malloc()'d string that explains the
1902 parse_ofp_exact_flow(struct flow *flow, struct flow *mask, const char *s,
1903 const struct simap *portno_names)
1905 char *pos, *key, *value_s;
1909 memset(flow, 0, sizeof *flow);
1911 memset(mask, 0, sizeof *mask);
1914 pos = copy = xstrdup(s);
1915 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
1916 const struct protocol *p;
1917 if (parse_protocol(key, &p)) {
1918 if (flow->dl_type) {
1919 error = xasprintf("%s: Ethernet type set multiple times", s);
1922 flow->dl_type = htons(p->dl_type);
1924 mask->dl_type = OVS_BE16_MAX;
1928 if (flow->nw_proto) {
1929 error = xasprintf("%s: network protocol set "
1930 "multiple times", s);
1933 flow->nw_proto = p->nw_proto;
1935 mask->nw_proto = UINT8_MAX;
1939 const struct mf_field *mf;
1940 union mf_value value;
1943 mf = mf_from_name(key);
1945 error = xasprintf("%s: unknown field %s", s, key);
1949 if (!mf_are_prereqs_ok(mf, flow)) {
1950 error = xasprintf("%s: prerequisites not met for setting %s",
1955 if (!mf_is_zero(mf, flow)) {
1956 error = xasprintf("%s: field %s set multiple times", s, key);
1960 if (!strcmp(key, "in_port")
1962 && simap_contains(portno_names, value_s)) {
1963 flow->in_port.ofp_port = u16_to_ofp(
1964 simap_get(portno_names, value_s));
1966 mask->in_port.ofp_port = u16_to_ofp(ntohs(OVS_BE16_MAX));
1969 field_error = mf_parse_value(mf, value_s, &value);
1971 error = xasprintf("%s: bad value for %s (%s)",
1972 s, key, field_error);
1977 mf_set_flow_value(mf, &value, flow);
1979 mf_mask_field(mf, mask);
1985 if (!flow->in_port.ofp_port) {
1986 flow->in_port.ofp_port = OFPP_NONE;
1993 memset(flow, 0, sizeof *flow);
1995 memset(mask, 0, sizeof *mask);
2001 static char * WARN_UNUSED_RESULT
2002 parse_bucket_str(struct ofputil_bucket *bucket, char *str_,
2003 enum ofputil_protocol *usable_protocols)
2005 struct ofpbuf ofpacts;
2006 char *pos, *act, *arg;
2010 bucket->watch_port = OFPP_ANY;
2011 bucket->watch_group = OFPG11_ANY;
2015 ofpbuf_init(&ofpacts, 64);
2016 while (ofputil_parse_key_value(&pos, &act, &arg)) {
2019 if (!strcasecmp(act, "weight")) {
2020 error = str_to_u16(arg, "weight", &bucket->weight);
2021 } else if (!strcasecmp(act, "watch_port")) {
2022 if (!ofputil_port_from_string(arg, &bucket->watch_port)
2023 || (ofp_to_u16(bucket->watch_port) >= ofp_to_u16(OFPP_MAX)
2024 && bucket->watch_port != OFPP_ANY)) {
2025 error = xasprintf("%s: invalid watch_port", arg);
2027 } else if (!strcasecmp(act, "watch_group")) {
2028 error = str_to_u32(arg, &bucket->watch_group);
2029 if (!error && bucket->watch_group > OFPG_MAX) {
2030 error = xasprintf("invalid watch_group id %"PRIu32,
2031 bucket->watch_group);
2034 error = str_to_ofpact__(pos, act, arg, &ofpacts, n_actions,
2040 ofpbuf_uninit(&ofpacts);
2045 ofpact_pad(&ofpacts);
2046 bucket->ofpacts = ofpacts.data;
2047 bucket->ofpacts_len = ofpacts.size;
2052 static char * WARN_UNUSED_RESULT
2053 parse_ofp_group_mod_str__(struct ofputil_group_mod *gm, uint16_t command,
2055 enum ofputil_protocol *usable_protocols)
2058 F_GROUP_TYPE = 1 << 0,
2061 char *save_ptr = NULL;
2062 bool had_type = false;
2064 struct ofputil_bucket *bucket;
2067 *usable_protocols = OFPUTIL_P_OF11_UP;
2071 fields = F_GROUP_TYPE | F_BUCKETS;
2074 case OFPGC11_DELETE:
2078 case OFPGC11_MODIFY:
2079 fields = F_GROUP_TYPE | F_BUCKETS;
2086 memset(gm, 0, sizeof *gm);
2087 gm->command = command;
2088 gm->group_id = OFPG_ANY;
2089 list_init(&gm->buckets);
2090 if (command == OFPGC11_DELETE && string[0] == '\0') {
2091 gm->group_id = OFPG_ALL;
2095 *usable_protocols = OFPUTIL_P_OF11_UP;
2097 if (fields & F_BUCKETS) {
2098 char *bkt_str = strstr(string, "bucket");
2107 bkt_str = strchr(bkt_str + 1, '=');
2109 error = xstrdup("must specify bucket content");
2114 next_bkt_str = strstr(bkt_str, "bucket");
2116 *next_bkt_str = '\0';
2119 bucket = xzalloc(sizeof(struct ofputil_bucket));
2120 error = parse_bucket_str(bucket, bkt_str, usable_protocols);
2125 list_push_back(&gm->buckets, &bucket->list_node);
2127 bkt_str = next_bkt_str;
2131 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
2132 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
2135 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
2137 error = xasprintf("field %s missing value", name);
2141 if (!strcmp(name, "group_id")) {
2142 if(!strcmp(value, "all")) {
2143 gm->group_id = OFPG_ALL;
2145 char *error = str_to_u32(value, &gm->group_id);
2149 if (gm->group_id != OFPG_ALL && gm->group_id > OFPG_MAX) {
2150 error = xasprintf("invalid group id %"PRIu32,
2155 } else if (!strcmp(name, "type")){
2156 if (!(fields & F_GROUP_TYPE)) {
2157 error = xstrdup("type is not needed");
2160 if (!strcmp(value, "all")) {
2161 gm->type = OFPGT11_ALL;
2162 } else if (!strcmp(value, "select")) {
2163 gm->type = OFPGT11_SELECT;
2164 } else if (!strcmp(value, "indirect")) {
2165 gm->type = OFPGT11_INDIRECT;
2166 } else if (!strcmp(value, "ff") ||
2167 !strcmp(value, "fast_failover")) {
2168 gm->type = OFPGT11_FF;
2170 error = xasprintf("invalid group type %s", value);
2174 } else if (!strcmp(name, "bucket")) {
2175 error = xstrdup("bucket is not needed");
2178 error = xasprintf("unknown keyword %s", name);
2182 if (gm->group_id == OFPG_ANY) {
2183 error = xstrdup("must specify a group_id");
2186 if (fields & F_GROUP_TYPE && !had_type) {
2187 error = xstrdup("must specify a type");
2191 /* Validate buckets. */
2192 LIST_FOR_EACH (bucket, list_node, &gm->buckets) {
2193 if (bucket->weight != 1 && gm->type != OFPGT11_SELECT) {
2194 error = xstrdup("Only select groups can have bucket weights.");
2198 if (gm->type == OFPGT11_INDIRECT && !list_is_short(&gm->buckets)) {
2199 error = xstrdup("Indirect groups can have at most one bucket.");
2205 ofputil_bucket_list_destroy(&gm->buckets);
2209 char * WARN_UNUSED_RESULT
2210 parse_ofp_group_mod_str(struct ofputil_group_mod *gm, uint16_t command,
2212 enum ofputil_protocol *usable_protocols)
2214 char *string = xstrdup(str_);
2215 char *error = parse_ofp_group_mod_str__(gm, command, string,
2220 ofputil_bucket_list_destroy(&gm->buckets);
2225 char * WARN_UNUSED_RESULT
2226 parse_ofp_group_mod_file(const char *file_name, uint16_t command,
2227 struct ofputil_group_mod **gms, size_t *n_gms,
2228 enum ofputil_protocol *usable_protocols)
2230 size_t allocated_gms;
2238 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
2239 if (stream == NULL) {
2240 return xasprintf("%s: open failed (%s)",
2241 file_name, ovs_strerror(errno));
2244 allocated_gms = *n_gms;
2247 *usable_protocols = OFPUTIL_P_OF11_UP;
2248 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
2249 enum ofputil_protocol usable;
2252 if (*n_gms >= allocated_gms) {
2253 *gms = x2nrealloc(*gms, &allocated_gms, sizeof **gms);
2255 error = parse_ofp_group_mod_str(&(*gms)[*n_gms], command, ds_cstr(&s),
2260 for (i = 0; i < *n_gms; i++) {
2261 ofputil_bucket_list_destroy(&(*gms)[i].buckets);
2268 if (stream != stdin) {
2272 return xasprintf("%s:%d: %s", file_name, line_number, error);
2274 *usable_protocols &= usable;
2279 if (stream != stdin) {