2 * Copyright (c) 2010, 2011, 2012, 2013, 2014, 2015 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"
24 #include <netinet/in.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"
41 #include "openvswitch/vconn.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 char * OVS_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 char * OVS_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 char * OVS_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 char * OVS_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 char * OVS_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 char * OVS_WARN_UNUSED_RESULT
148 str_to_mac(const char *str, struct eth_addr *mac)
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 char * OVS_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 'str' as a conntrack helper into 'alg'.
174 * Returns NULL if successful, otherwise a malloc()'d string describing the
175 * error. The caller is responsible for freeing the returned string. */
176 char * OVS_WARN_UNUSED_RESULT
177 str_to_connhelper(const char *str, uint16_t *alg)
179 if (!strcmp(str, "ftp")) {
183 return xasprintf("invalid conntrack helper \"%s\"", str);
193 parse_protocol(const char *name, const struct protocol **p_out)
195 static const struct protocol protocols[] = {
196 { "ip", ETH_TYPE_IP, 0 },
197 { "ipv4", ETH_TYPE_IP, 0 },
198 { "ip4", ETH_TYPE_IP, 0 },
199 { "arp", ETH_TYPE_ARP, 0 },
200 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
201 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
202 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
203 { "sctp", ETH_TYPE_IP, IPPROTO_SCTP },
204 { "ipv6", ETH_TYPE_IPV6, 0 },
205 { "ip6", ETH_TYPE_IPV6, 0 },
206 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
207 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
208 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
209 { "sctp6", ETH_TYPE_IPV6, IPPROTO_SCTP },
210 { "rarp", ETH_TYPE_RARP, 0},
211 { "mpls", ETH_TYPE_MPLS, 0 },
212 { "mplsm", ETH_TYPE_MPLS_MCAST, 0 },
214 const struct protocol *p;
216 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
217 if (!strcmp(p->name, name)) {
226 /* Parses 's' as the (possibly masked) value of field 'mf', and updates
227 * 'match' appropriately. Restricts the set of usable protocols to ones
228 * supporting the parsed field.
230 * Returns NULL if successful, otherwise a malloc()'d string describing the
231 * error. The caller is responsible for freeing the returned string. */
232 static char * OVS_WARN_UNUSED_RESULT
233 parse_field(const struct mf_field *mf, const char *s, struct match *match,
234 enum ofputil_protocol *usable_protocols)
236 union mf_value value, mask;
240 /* If there's no string, we're just trying to match on the
241 * existence of the field, so use a no-op value. */
245 error = mf_parse(mf, s, &value, &mask);
247 *usable_protocols &= mf_set(mf, &value, &mask, match, &error);
253 extract_actions(char *s)
255 s = strstr(s, "action");
258 s = strchr(s + 1, '=');
259 return s ? s + 1 : NULL;
266 static char * OVS_WARN_UNUSED_RESULT
267 parse_ofp_str__(struct ofputil_flow_mod *fm, int command, char *string,
268 enum ofputil_protocol *usable_protocols)
273 F_IMPORTANCE = 1 << 2,
278 char *act_str = NULL;
281 *usable_protocols = OFPUTIL_P_ANY;
286 string += strspn(string, " \t\r\n"); /* Skip white space. */
287 len = strcspn(string, ", \t\r\n"); /* Get length of the first token. */
289 if (!strncmp(string, "add", len)) {
291 } else if (!strncmp(string, "delete", len)) {
292 command = OFPFC_DELETE;
293 } else if (!strncmp(string, "delete_strict", len)) {
294 command = OFPFC_DELETE_STRICT;
295 } else if (!strncmp(string, "modify", len)) {
296 command = OFPFC_MODIFY;
297 } else if (!strncmp(string, "modify_strict", len)) {
298 command = OFPFC_MODIFY_STRICT;
312 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS | F_IMPORTANCE;
319 case OFPFC_DELETE_STRICT:
320 fields = F_OUT_PORT | F_PRIORITY;
324 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
327 case OFPFC_MODIFY_STRICT:
328 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
335 match_init_catchall(&fm->match);
336 fm->priority = OFP_DEFAULT_PRIORITY;
337 fm->cookie = htonll(0);
338 fm->cookie_mask = htonll(0);
339 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
340 /* For modify, by default, don't update the cookie. */
341 fm->new_cookie = OVS_BE64_MAX;
343 fm->new_cookie = htonll(0);
345 fm->modify_cookie = false;
347 fm->command = command;
348 fm->idle_timeout = OFP_FLOW_PERMANENT;
349 fm->hard_timeout = OFP_FLOW_PERMANENT;
350 fm->buffer_id = UINT32_MAX;
351 fm->out_port = OFPP_ANY;
354 fm->out_group = OFPG_ANY;
355 fm->delete_reason = OFPRR_DELETE;
356 if (fields & F_ACTIONS) {
357 act_str = extract_actions(string);
359 return xstrdup("must specify an action");
363 while (ofputil_parse_key_value(&string, &name, &value)) {
364 const struct protocol *p;
367 if (parse_protocol(name, &p)) {
368 match_set_dl_type(&fm->match, htons(p->dl_type));
370 match_set_nw_proto(&fm->match, p->nw_proto);
372 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
373 fm->flags |= OFPUTIL_FF_SEND_FLOW_REM;
374 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
375 fm->flags |= OFPUTIL_FF_CHECK_OVERLAP;
376 } else if (fields & F_FLAGS && !strcmp(name, "reset_counts")) {
377 fm->flags |= OFPUTIL_FF_RESET_COUNTS;
378 *usable_protocols &= OFPUTIL_P_OF12_UP;
379 } else if (fields & F_FLAGS && !strcmp(name, "no_packet_counts")) {
380 fm->flags |= OFPUTIL_FF_NO_PKT_COUNTS;
381 *usable_protocols &= OFPUTIL_P_OF13_UP;
382 } else if (fields & F_FLAGS && !strcmp(name, "no_byte_counts")) {
383 fm->flags |= OFPUTIL_FF_NO_BYT_COUNTS;
384 *usable_protocols &= OFPUTIL_P_OF13_UP;
385 } else if (!strcmp(name, "no_readonly_table")
386 || !strcmp(name, "allow_hidden_fields")) {
387 /* ignore these fields. */
388 } else if (mf_from_name(name)) {
389 error = parse_field(mf_from_name(name), value, &fm->match,
393 return xasprintf("field %s missing value", name);
396 if (!strcmp(name, "table")) {
397 error = str_to_u8(value, "table", &fm->table_id);
398 if (fm->table_id != 0xff) {
399 *usable_protocols &= OFPUTIL_P_TID;
401 } else if (fields & F_OUT_PORT && !strcmp(name, "out_port")) {
402 if (!ofputil_port_from_string(value, &fm->out_port)) {
403 error = xasprintf("%s is not a valid OpenFlow port",
406 } else if (fields & F_OUT_PORT && !strcmp(name, "out_group")) {
407 *usable_protocols &= OFPUTIL_P_OF11_UP;
408 if (!ofputil_group_from_string(value, &fm->out_group)) {
409 error = xasprintf("%s is not a valid OpenFlow group",
412 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
413 uint16_t priority = 0;
415 error = str_to_u16(value, name, &priority);
416 fm->priority = priority;
417 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
418 error = str_to_u16(value, name, &fm->idle_timeout);
419 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
420 error = str_to_u16(value, name, &fm->hard_timeout);
421 } else if (fields & F_IMPORTANCE && !strcmp(name, "importance")) {
422 error = str_to_u16(value, name, &fm->importance);
423 } else if (!strcmp(name, "cookie")) {
424 char *mask = strchr(value, '/');
427 /* A mask means we're searching for a cookie. */
428 if (command == OFPFC_ADD) {
429 return xstrdup("flow additions cannot use "
433 error = str_to_be64(value, &fm->cookie);
437 error = str_to_be64(mask + 1, &fm->cookie_mask);
439 /* Matching of the cookie is only supported through NXM or
441 if (fm->cookie_mask != htonll(0)) {
442 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
445 /* No mask means that the cookie is being set. */
446 if (command != OFPFC_ADD && command != OFPFC_MODIFY
447 && command != OFPFC_MODIFY_STRICT) {
448 return xstrdup("cannot set cookie");
450 error = str_to_be64(value, &fm->new_cookie);
451 fm->modify_cookie = true;
453 } else if (!strcmp(name, "duration")
454 || !strcmp(name, "n_packets")
455 || !strcmp(name, "n_bytes")
456 || !strcmp(name, "idle_age")
457 || !strcmp(name, "hard_age")) {
458 /* Ignore these, so that users can feed the output of
459 * "ovs-ofctl dump-flows" back into commands that parse
462 error = xasprintf("unknown keyword %s", name);
470 /* Check for usable protocol interdependencies between match fields. */
471 if (fm->match.flow.dl_type == htons(ETH_TYPE_IPV6)) {
472 const struct flow_wildcards *wc = &fm->match.wc;
473 /* Only NXM and OXM support matching L3 and L4 fields within IPv6.
475 * (IPv6 specific fields as well as arp_sha, arp_tha, nw_frag, and
476 * nw_ttl are covered elsewhere so they don't need to be included in
479 if (wc->masks.nw_proto || wc->masks.nw_tos
480 || wc->masks.tp_src || wc->masks.tp_dst) {
481 *usable_protocols &= OFPUTIL_P_NXM_OXM_ANY;
484 if (!fm->cookie_mask && fm->new_cookie == OVS_BE64_MAX
485 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
486 /* On modifies without a mask, we are supposed to add a flow if
487 * one does not exist. If a cookie wasn't been specified, use a
488 * default of zero. */
489 fm->new_cookie = htonll(0);
491 if (fields & F_ACTIONS) {
492 enum ofputil_protocol action_usable_protocols;
493 struct ofpbuf ofpacts;
496 ofpbuf_init(&ofpacts, 32);
497 error = ofpacts_parse_instructions(act_str, &ofpacts,
498 &action_usable_protocols);
499 *usable_protocols &= action_usable_protocols;
503 err = ofpacts_check(ofpacts.data, ofpacts.size, &fm->match.flow,
504 OFPP_MAX, fm->table_id, 255, usable_protocols);
505 if (!err && !*usable_protocols) {
506 err = OFPERR_OFPBAC_MATCH_INCONSISTENT;
509 error = xasprintf("actions are invalid with specified match "
510 "(%s)", ofperr_to_string(err));
515 ofpbuf_uninit(&ofpacts);
519 fm->ofpacts_len = ofpacts.size;
520 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
529 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
530 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
531 * Returns the set of usable protocols in '*usable_protocols'.
533 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
534 * constant for 'command'. To parse syntax for an OFPST_FLOW or
535 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'.
537 * If 'command' is given as -2, 'str_' may begin with a command name ("add",
538 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
539 * name is treated as "add".
541 * Returns NULL if successful, otherwise a malloc()'d string describing the
542 * error. The caller is responsible for freeing the returned string. */
543 char * OVS_WARN_UNUSED_RESULT
544 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
545 enum ofputil_protocol *usable_protocols)
547 char *string = xstrdup(str_);
550 error = parse_ofp_str__(fm, command, string, usable_protocols);
560 static char * OVS_WARN_UNUSED_RESULT
561 parse_ofp_meter_mod_str__(struct ofputil_meter_mod *mm, char *string,
562 struct ofpbuf *bands, int command,
563 enum ofputil_protocol *usable_protocols)
570 char *save_ptr = NULL;
571 char *band_str = NULL;
574 /* Meters require at least OF 1.3. */
575 *usable_protocols = OFPUTIL_P_OF13_UP;
583 fields = F_METER | F_FLAGS | F_BANDS;
591 fields = F_METER | F_FLAGS | F_BANDS;
598 mm->command = command;
599 mm->meter.meter_id = 0;
601 if (fields & F_BANDS) {
602 band_str = strstr(string, "band");
604 return xstrdup("must specify bands");
608 band_str = strchr(band_str + 1, '=');
610 return xstrdup("must specify bands");
615 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
616 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
618 if (fields & F_FLAGS && !strcmp(name, "kbps")) {
619 mm->meter.flags |= OFPMF13_KBPS;
620 } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
621 mm->meter.flags |= OFPMF13_PKTPS;
622 } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
623 mm->meter.flags |= OFPMF13_BURST;
624 } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
625 mm->meter.flags |= OFPMF13_STATS;
629 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
631 return xasprintf("field %s missing value", name);
634 if (!strcmp(name, "meter")) {
635 if (!strcmp(value, "all")) {
636 mm->meter.meter_id = OFPM13_ALL;
637 } else if (!strcmp(value, "controller")) {
638 mm->meter.meter_id = OFPM13_CONTROLLER;
639 } else if (!strcmp(value, "slowpath")) {
640 mm->meter.meter_id = OFPM13_SLOWPATH;
642 char *error = str_to_u32(value, &mm->meter.meter_id);
646 if (mm->meter.meter_id > OFPM13_MAX
647 || !mm->meter.meter_id) {
648 return xasprintf("invalid value for %s", name);
652 return xasprintf("unknown keyword %s", name);
656 if (fields & F_METER && !mm->meter.meter_id) {
657 return xstrdup("must specify 'meter'");
659 if (fields & F_FLAGS && !mm->meter.flags) {
660 return xstrdup("meter must specify either 'kbps' or 'pktps'");
663 if (fields & F_BANDS) {
664 uint16_t n_bands = 0;
665 struct ofputil_meter_band *band = NULL;
668 for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
669 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
673 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
675 return xasprintf("field %s missing value", name);
678 if (!strcmp(name, "type")) {
679 /* Start a new band */
680 band = ofpbuf_put_zeros(bands, sizeof *band);
683 if (!strcmp(value, "drop")) {
684 band->type = OFPMBT13_DROP;
685 } else if (!strcmp(value, "dscp_remark")) {
686 band->type = OFPMBT13_DSCP_REMARK;
688 return xasprintf("field %s unknown value %s", name, value);
690 } else if (!band || !band->type) {
691 return xstrdup("band must start with the 'type' keyword");
692 } else if (!strcmp(name, "rate")) {
693 char *error = str_to_u32(value, &band->rate);
697 } else if (!strcmp(name, "burst_size")) {
698 char *error = str_to_u32(value, &band->burst_size);
702 } else if (!strcmp(name, "prec_level")) {
703 char *error = str_to_u8(value, name, &band->prec_level);
708 return xasprintf("unknown keyword %s", name);
713 return xstrdup("meter must have bands");
716 mm->meter.n_bands = n_bands;
717 mm->meter.bands = ofpbuf_steal_data(bands);
719 for (i = 0; i < n_bands; ++i) {
720 band = &mm->meter.bands[i];
723 return xstrdup("band must have 'type'");
725 if (band->type == OFPMBT13_DSCP_REMARK) {
726 if (!band->prec_level) {
727 return xstrdup("'dscp_remark' band must have"
731 if (band->prec_level) {
732 return xstrdup("Only 'dscp_remark' band may have"
737 return xstrdup("band must have 'rate'");
739 if (mm->meter.flags & OFPMF13_BURST) {
740 if (!band->burst_size) {
741 return xstrdup("band must have 'burst_size' "
742 "when 'burst' flag is set");
745 if (band->burst_size) {
746 return xstrdup("band may have 'burst_size' only "
747 "when 'burst' flag is set");
752 mm->meter.n_bands = 0;
753 mm->meter.bands = NULL;
759 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
760 * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
762 * Returns NULL if successful, otherwise a malloc()'d string describing the
763 * error. The caller is responsible for freeing the returned string. */
764 char * OVS_WARN_UNUSED_RESULT
765 parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
766 int command, enum ofputil_protocol *usable_protocols)
772 ofpbuf_init(&bands, 64);
773 string = xstrdup(str_);
775 error = parse_ofp_meter_mod_str__(mm, string, &bands, command,
779 ofpbuf_uninit(&bands);
784 static char * OVS_WARN_UNUSED_RESULT
785 parse_flow_monitor_request__(struct ofputil_flow_monitor_request *fmr,
786 const char *str_, char *string,
787 enum ofputil_protocol *usable_protocols)
789 static atomic_count id = ATOMIC_COUNT_INIT(0);
792 fmr->id = atomic_count_inc(&id);
794 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
795 | NXFMF_OWN | NXFMF_ACTIONS);
796 fmr->out_port = OFPP_NONE;
797 fmr->table_id = 0xff;
798 match_init_catchall(&fmr->match);
800 while (ofputil_parse_key_value(&string, &name, &value)) {
801 const struct protocol *p;
804 if (!strcmp(name, "!initial")) {
805 fmr->flags &= ~NXFMF_INITIAL;
806 } else if (!strcmp(name, "!add")) {
807 fmr->flags &= ~NXFMF_ADD;
808 } else if (!strcmp(name, "!delete")) {
809 fmr->flags &= ~NXFMF_DELETE;
810 } else if (!strcmp(name, "!modify")) {
811 fmr->flags &= ~NXFMF_MODIFY;
812 } else if (!strcmp(name, "!actions")) {
813 fmr->flags &= ~NXFMF_ACTIONS;
814 } else if (!strcmp(name, "!own")) {
815 fmr->flags &= ~NXFMF_OWN;
816 } else if (parse_protocol(name, &p)) {
817 match_set_dl_type(&fmr->match, htons(p->dl_type));
819 match_set_nw_proto(&fmr->match, p->nw_proto);
821 } else if (mf_from_name(name)) {
822 error = parse_field(mf_from_name(name), value, &fmr->match,
826 return xasprintf("%s: field %s missing value", str_, name);
829 if (!strcmp(name, "table")) {
830 error = str_to_u8(value, "table", &fmr->table_id);
831 } else if (!strcmp(name, "out_port")) {
832 fmr->out_port = u16_to_ofp(atoi(value));
834 return xasprintf("%s: unknown keyword %s", str_, name);
845 /* Convert 'str_' (as described in the documentation for the "monitor" command
846 * in the ovs-ofctl man page) into 'fmr'.
848 * Returns NULL if successful, otherwise a malloc()'d string describing the
849 * error. The caller is responsible for freeing the returned string. */
850 char * OVS_WARN_UNUSED_RESULT
851 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
853 enum ofputil_protocol *usable_protocols)
855 char *string = xstrdup(str_);
856 char *error = parse_flow_monitor_request__(fmr, str_, string,
862 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
863 * (one of OFPFC_*) into 'fm'.
865 * If 'command' is given as -2, 'string' may begin with a command name ("add",
866 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
867 * name is treated as "add".
869 * Returns NULL if successful, otherwise a malloc()'d string describing the
870 * error. The caller is responsible for freeing the returned string. */
871 char * OVS_WARN_UNUSED_RESULT
872 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
874 enum ofputil_protocol *usable_protocols)
876 char *error = parse_ofp_str(fm, command, string, usable_protocols);
879 /* Normalize a copy of the match. This ensures that non-normalized
880 * flows get logged but doesn't affect what gets sent to the switch, so
881 * that the switch can do whatever it likes with the flow. */
882 struct match match_copy = fm->match;
883 ofputil_normalize_match(&match_copy);
889 /* Convert 'setting' (as described for the "mod-table" command
890 * in ovs-ofctl man page) into 'tm->table_vacancy->vacancy_up' and
891 * 'tm->table_vacancy->vacancy_down' threshold values.
892 * For the two threshold values, value of vacancy_up is always greater
893 * than value of vacancy_down.
895 * Returns NULL if successful, otherwise a malloc()'d string describing the
896 * error. The caller is responsible for freeing the returned string. */
897 char * OVS_WARN_UNUSED_RESULT
898 parse_ofp_table_vacancy(struct ofputil_table_mod *tm, const char *setting)
900 char *save_ptr = NULL;
901 char *vac_up, *vac_down;
902 char *value = xstrdup(setting);
904 int vacancy_up, vacancy_down;
906 strtok_r(value, ":", &save_ptr);
907 vac_down = strtok_r(NULL, ",", &save_ptr);
909 ret_msg = xasprintf("Vacancy down value missing");
912 if (!str_to_int(vac_down, 0, &vacancy_down) ||
913 vacancy_down < 0 || vacancy_down > 100) {
914 ret_msg = xasprintf("Invalid vacancy down value \"%s\"", vac_down);
917 vac_up = strtok_r(NULL, ",", &save_ptr);
919 ret_msg = xasprintf("Vacancy up value missing");
922 if (!str_to_int(vac_up, 0, &vacancy_up) ||
923 vacancy_up < 0 || vacancy_up > 100) {
924 ret_msg = xasprintf("Invalid vacancy up value \"%s\"", vac_up);
927 if (vacancy_down > vacancy_up) {
928 ret_msg = xasprintf("Invalid vacancy range, vacancy up should be "
929 "greater than vacancy down (%s)",
930 ofperr_to_string(OFPERR_OFPBPC_BAD_VALUE));
935 tm->table_vacancy.vacancy_down = vacancy_down;
936 tm->table_vacancy.vacancy_up = vacancy_up;
944 /* Convert 'table_id' and 'setting' (as described for the "mod-table" command
945 * in the ovs-ofctl man page) into 'tm' for sending a table_mod command to a
948 * Stores a bitmap of the OpenFlow versions that are usable for 'tm' into
949 * '*usable_versions'.
951 * Returns NULL if successful, otherwise a malloc()'d string describing the
952 * error. The caller is responsible for freeing the returned string. */
953 char * OVS_WARN_UNUSED_RESULT
954 parse_ofp_table_mod(struct ofputil_table_mod *tm, const char *table_id,
955 const char *setting, uint32_t *usable_versions)
957 *usable_versions = 0;
958 if (!strcasecmp(table_id, "all")) {
959 tm->table_id = OFPTT_ALL;
961 char *error = str_to_u8(table_id, "table_id", &tm->table_id);
967 tm->miss = OFPUTIL_TABLE_MISS_DEFAULT;
968 tm->eviction = OFPUTIL_TABLE_EVICTION_DEFAULT;
969 tm->eviction_flags = UINT32_MAX;
970 tm->vacancy = OFPUTIL_TABLE_VACANCY_DEFAULT;
971 tm->table_vacancy.vacancy_down = 0;
972 tm->table_vacancy.vacancy_up = 0;
973 tm->table_vacancy.vacancy = 0;
974 /* Only OpenFlow 1.1 and 1.2 can configure table-miss via table_mod.
975 * Only OpenFlow 1.4+ can configure eviction and vacancy events
978 if (!strcmp(setting, "controller")) {
979 tm->miss = OFPUTIL_TABLE_MISS_CONTROLLER;
980 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
981 } else if (!strcmp(setting, "continue")) {
982 tm->miss = OFPUTIL_TABLE_MISS_CONTINUE;
983 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
984 } else if (!strcmp(setting, "drop")) {
985 tm->miss = OFPUTIL_TABLE_MISS_DROP;
986 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
987 } else if (!strcmp(setting, "evict")) {
988 tm->eviction = OFPUTIL_TABLE_EVICTION_ON;
989 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
990 } else if (!strcmp(setting, "noevict")) {
991 tm->eviction = OFPUTIL_TABLE_EVICTION_OFF;
992 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
993 } else if (!strncmp(setting, "vacancy", strcspn(setting, ":"))) {
994 tm->vacancy = OFPUTIL_TABLE_VACANCY_ON;
995 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
996 char *error = parse_ofp_table_vacancy(tm, setting);
1000 } else if (!strcmp(setting, "novacancy")) {
1001 tm->vacancy = OFPUTIL_TABLE_VACANCY_OFF;
1002 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
1004 return xasprintf("invalid table_mod setting %s", setting);
1007 if (tm->table_id == 0xfe
1008 && tm->miss == OFPUTIL_TABLE_MISS_CONTINUE) {
1009 return xstrdup("last table's flow miss handling can not be continue");
1016 /* Opens file 'file_name' and reads each line as a flow_mod of the specified
1017 * type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
1018 * on the caller's behalf, and the number of flow_mods in '*n_fms'.
1020 * If 'command' is given as -2, each line may start with a command name
1021 * ("add", "modify", "delete", "modify_strict", or "delete_strict"). A missing
1022 * command name is treated as "add".
1024 * Returns NULL if successful, otherwise a malloc()'d string describing the
1025 * error. The caller is responsible for freeing the returned string. */
1026 char * OVS_WARN_UNUSED_RESULT
1027 parse_ofp_flow_mod_file(const char *file_name, int command,
1028 struct ofputil_flow_mod **fms, size_t *n_fms,
1029 enum ofputil_protocol *usable_protocols)
1031 size_t allocated_fms;
1036 *usable_protocols = OFPUTIL_P_ANY;
1041 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1042 if (stream == NULL) {
1043 return xasprintf("%s: open failed (%s)",
1044 file_name, ovs_strerror(errno));
1047 allocated_fms = *n_fms;
1050 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
1052 enum ofputil_protocol usable;
1054 if (*n_fms >= allocated_fms) {
1055 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
1057 error = parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command,
1063 for (i = 0; i < *n_fms; i++) {
1064 free(CONST_CAST(struct ofpact *, (*fms)[i].ofpacts));
1071 if (stream != stdin) {
1075 err_msg = xasprintf("%s:%d: %s", file_name, line_number, error);
1079 *usable_protocols &= usable; /* Each line can narrow the set. */
1084 if (stream != stdin) {
1090 char * OVS_WARN_UNUSED_RESULT
1091 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1092 bool aggregate, const char *string,
1093 enum ofputil_protocol *usable_protocols)
1095 struct ofputil_flow_mod fm;
1098 error = parse_ofp_str(&fm, -1, string, usable_protocols);
1103 /* Special table ID support not required for stats requests. */
1104 if (*usable_protocols & OFPUTIL_P_OF10_STD_TID) {
1105 *usable_protocols |= OFPUTIL_P_OF10_STD;
1107 if (*usable_protocols & OFPUTIL_P_OF10_NXM_TID) {
1108 *usable_protocols |= OFPUTIL_P_OF10_NXM;
1111 fsr->aggregate = aggregate;
1112 fsr->cookie = fm.cookie;
1113 fsr->cookie_mask = fm.cookie_mask;
1114 fsr->match = fm.match;
1115 fsr->out_port = fm.out_port;
1116 fsr->out_group = fm.out_group;
1117 fsr->table_id = fm.table_id;
1121 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1122 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1123 * mf_field. Fields must be specified in a natural order for satisfying
1124 * prerequisites. If 'mask' is specified, fills the mask field for each of the
1125 * field specified in flow. If the map, 'names_portno' is specfied, converts
1126 * the in_port name into port no while setting the 'flow'.
1128 * Returns NULL on success, otherwise a malloc()'d string that explains the
1131 parse_ofp_exact_flow(struct flow *flow, struct flow *mask, const char *s,
1132 const struct simap *portno_names)
1134 char *pos, *key, *value_s;
1138 memset(flow, 0, sizeof *flow);
1140 memset(mask, 0, sizeof *mask);
1143 pos = copy = xstrdup(s);
1144 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
1145 const struct protocol *p;
1146 if (parse_protocol(key, &p)) {
1147 if (flow->dl_type) {
1148 error = xasprintf("%s: Ethernet type set multiple times", s);
1151 flow->dl_type = htons(p->dl_type);
1153 mask->dl_type = OVS_BE16_MAX;
1157 if (flow->nw_proto) {
1158 error = xasprintf("%s: network protocol set "
1159 "multiple times", s);
1162 flow->nw_proto = p->nw_proto;
1164 mask->nw_proto = UINT8_MAX;
1168 const struct mf_field *mf;
1169 union mf_value value;
1172 mf = mf_from_name(key);
1174 error = xasprintf("%s: unknown field %s", s, key);
1178 if (!mf_are_prereqs_ok(mf, flow)) {
1179 error = xasprintf("%s: prerequisites not met for setting %s",
1184 if (mf_is_set(mf, flow)) {
1185 error = xasprintf("%s: field %s set multiple times", s, key);
1189 if (!strcmp(key, "in_port")
1191 && simap_contains(portno_names, value_s)) {
1192 flow->in_port.ofp_port = u16_to_ofp(
1193 simap_get(portno_names, value_s));
1195 mask->in_port.ofp_port = u16_to_ofp(ntohs(OVS_BE16_MAX));
1198 field_error = mf_parse_value(mf, value_s, &value);
1200 error = xasprintf("%s: bad value for %s (%s)",
1201 s, key, field_error);
1206 mf_set_flow_value(mf, &value, flow);
1208 mf_mask_field(mf, mask);
1214 if (!flow->in_port.ofp_port) {
1215 flow->in_port.ofp_port = OFPP_NONE;
1222 memset(flow, 0, sizeof *flow);
1224 memset(mask, 0, sizeof *mask);
1230 static char * OVS_WARN_UNUSED_RESULT
1231 parse_bucket_str(struct ofputil_bucket *bucket, char *str_, uint8_t group_type,
1232 enum ofputil_protocol *usable_protocols)
1234 char *pos, *key, *value;
1235 struct ofpbuf ofpacts;
1239 bucket->weight = group_type == OFPGT11_SELECT ? 1 : 0;
1240 bucket->bucket_id = OFPG15_BUCKET_ALL;
1241 bucket->watch_port = OFPP_ANY;
1242 bucket->watch_group = OFPG_ANY;
1248 while (ofputil_parse_key_value(&pos, &key, &value)) {
1249 if (!strcasecmp(key, "weight")) {
1250 error = str_to_u16(value, "weight", &bucket->weight);
1251 } else if (!strcasecmp(key, "watch_port")) {
1252 if (!ofputil_port_from_string(value, &bucket->watch_port)
1253 || (ofp_to_u16(bucket->watch_port) >= ofp_to_u16(OFPP_MAX)
1254 && bucket->watch_port != OFPP_ANY)) {
1255 error = xasprintf("%s: invalid watch_port", value);
1257 } else if (!strcasecmp(key, "watch_group")) {
1258 error = str_to_u32(value, &bucket->watch_group);
1259 if (!error && bucket->watch_group > OFPG_MAX) {
1260 error = xasprintf("invalid watch_group id %"PRIu32,
1261 bucket->watch_group);
1263 } else if (!strcasecmp(key, "bucket_id")) {
1264 error = str_to_u32(value, &bucket->bucket_id);
1265 if (!error && bucket->bucket_id > OFPG15_BUCKET_MAX) {
1266 error = xasprintf("invalid bucket_id id %"PRIu32,
1269 *usable_protocols &= OFPUTIL_P_OF15_UP;
1270 } else if (!strcasecmp(key, "action") || !strcasecmp(key, "actions")) {
1271 ds_put_format(&actions, "%s,", value);
1273 ds_put_format(&actions, "%s(%s),", key, value);
1277 ds_destroy(&actions);
1282 if (!actions.length) {
1283 return xstrdup("bucket must specify actions");
1285 ds_chomp(&actions, ',');
1287 ofpbuf_init(&ofpacts, 0);
1288 error = ofpacts_parse_actions(ds_cstr(&actions), &ofpacts,
1290 ds_destroy(&actions);
1292 ofpbuf_uninit(&ofpacts);
1295 bucket->ofpacts = ofpacts.data;
1296 bucket->ofpacts_len = ofpacts.size;
1301 static char * OVS_WARN_UNUSED_RESULT
1302 parse_select_group_field(char *s, struct field_array *fa,
1303 enum ofputil_protocol *usable_protocols)
1305 char *name, *value_str;
1307 while (ofputil_parse_key_value(&s, &name, &value_str)) {
1308 const struct mf_field *mf = mf_from_name(name);
1312 union mf_value value;
1314 if (bitmap_is_set(fa->used.bm, mf->id)) {
1315 return xasprintf("%s: duplicate field", name);
1319 error = mf_parse_value(mf, value_str, &value);
1324 /* The mask cannot be all-zeros */
1325 if (!mf_is_tun_metadata(mf) &&
1326 is_all_zeros(&value, mf->n_bytes)) {
1327 return xasprintf("%s: values are wildcards here "
1328 "and must not be all-zeros", s);
1331 /* The values parsed are masks for fields used
1332 * by the selection method */
1333 if (!mf_is_mask_valid(mf, &value)) {
1334 return xasprintf("%s: invalid mask for field %s",
1335 value_str, mf->name);
1338 memset(&value, 0xff, mf->n_bytes);
1341 field_array_set(mf->id, &value, fa);
1343 if (is_all_ones(&value, mf->n_bytes)) {
1344 *usable_protocols &= mf->usable_protocols_exact;
1345 } else if (mf->usable_protocols_bitwise == mf->usable_protocols_cidr
1346 || ip_is_cidr(value.be32)) {
1347 *usable_protocols &= mf->usable_protocols_cidr;
1349 *usable_protocols &= mf->usable_protocols_bitwise;
1352 return xasprintf("%s: unknown field %s", s, name);
1359 static char * OVS_WARN_UNUSED_RESULT
1360 parse_ofp_group_mod_str__(struct ofputil_group_mod *gm, uint16_t command,
1362 enum ofputil_protocol *usable_protocols)
1365 F_GROUP_TYPE = 1 << 0,
1367 F_COMMAND_BUCKET_ID = 1 << 2,
1368 F_COMMAND_BUCKET_ID_ALL = 1 << 3,
1370 bool had_type = false;
1371 bool had_command_bucket_id = false;
1372 struct ofputil_bucket *bucket;
1375 *usable_protocols = OFPUTIL_P_OF11_UP;
1379 fields = F_GROUP_TYPE | F_BUCKETS;
1382 case OFPGC11_DELETE:
1386 case OFPGC11_MODIFY:
1387 fields = F_GROUP_TYPE | F_BUCKETS;
1390 case OFPGC15_INSERT_BUCKET:
1391 fields = F_BUCKETS | F_COMMAND_BUCKET_ID;
1392 *usable_protocols &= OFPUTIL_P_OF15_UP;
1395 case OFPGC15_REMOVE_BUCKET:
1396 fields = F_COMMAND_BUCKET_ID | F_COMMAND_BUCKET_ID_ALL;
1397 *usable_protocols &= OFPUTIL_P_OF15_UP;
1404 memset(gm, 0, sizeof *gm);
1405 gm->command = command;
1406 gm->group_id = OFPG_ANY;
1407 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1408 list_init(&gm->buckets);
1409 if (command == OFPGC11_DELETE && string[0] == '\0') {
1410 gm->group_id = OFPG_ALL;
1414 *usable_protocols = OFPUTIL_P_OF11_UP;
1416 /* Strip the buckets off the end of 'string', if there are any, saving a
1417 * pointer for later. We want to parse the buckets last because the bucket
1418 * type influences bucket defaults. */
1419 char *bkt_str = strstr(string, "bucket=");
1421 if (!(fields & F_BUCKETS)) {
1422 error = xstrdup("bucket is not needed");
1428 /* Parse everything before the buckets. */
1431 while (ofputil_parse_key_value(&pos, &name, &value)) {
1432 if (!strcmp(name, "command_bucket_id")) {
1433 if (!(fields & F_COMMAND_BUCKET_ID)) {
1434 error = xstrdup("command bucket id is not needed");
1437 if (!strcmp(value, "all")) {
1438 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1439 } else if (!strcmp(value, "first")) {
1440 gm->command_bucket_id = OFPG15_BUCKET_FIRST;
1441 } else if (!strcmp(value, "last")) {
1442 gm->command_bucket_id = OFPG15_BUCKET_LAST;
1444 error = str_to_u32(value, &gm->command_bucket_id);
1448 if (gm->command_bucket_id > OFPG15_BUCKET_MAX
1449 && (gm->command_bucket_id != OFPG15_BUCKET_FIRST
1450 && gm->command_bucket_id != OFPG15_BUCKET_LAST
1451 && gm->command_bucket_id != OFPG15_BUCKET_ALL)) {
1452 error = xasprintf("invalid command bucket id %"PRIu32,
1453 gm->command_bucket_id);
1457 if (gm->command_bucket_id == OFPG15_BUCKET_ALL
1458 && !(fields & F_COMMAND_BUCKET_ID_ALL)) {
1459 error = xstrdup("command_bucket_id=all is not permitted");
1462 had_command_bucket_id = true;
1463 } else if (!strcmp(name, "group_id")) {
1464 if(!strcmp(value, "all")) {
1465 gm->group_id = OFPG_ALL;
1467 error = str_to_u32(value, &gm->group_id);
1471 if (gm->group_id != OFPG_ALL && gm->group_id > OFPG_MAX) {
1472 error = xasprintf("invalid group id %"PRIu32,
1477 } else if (!strcmp(name, "type")){
1478 if (!(fields & F_GROUP_TYPE)) {
1479 error = xstrdup("type is not needed");
1482 if (!strcmp(value, "all")) {
1483 gm->type = OFPGT11_ALL;
1484 } else if (!strcmp(value, "select")) {
1485 gm->type = OFPGT11_SELECT;
1486 } else if (!strcmp(value, "indirect")) {
1487 gm->type = OFPGT11_INDIRECT;
1488 } else if (!strcmp(value, "ff") ||
1489 !strcmp(value, "fast_failover")) {
1490 gm->type = OFPGT11_FF;
1492 error = xasprintf("invalid group type %s", value);
1496 } else if (!strcmp(name, "selection_method")) {
1497 if (!(fields & F_GROUP_TYPE)) {
1498 error = xstrdup("selection method is not needed");
1501 if (strlen(value) >= NTR_MAX_SELECTION_METHOD_LEN) {
1502 error = xasprintf("selection method is longer than %u"
1504 NTR_MAX_SELECTION_METHOD_LEN - 1);
1507 memset(gm->props.selection_method, '\0',
1508 NTR_MAX_SELECTION_METHOD_LEN);
1509 strcpy(gm->props.selection_method, value);
1510 *usable_protocols &= OFPUTIL_P_OF15_UP;
1511 } else if (!strcmp(name, "selection_method_param")) {
1512 if (!(fields & F_GROUP_TYPE)) {
1513 error = xstrdup("selection method param is not needed");
1516 error = str_to_u64(value, &gm->props.selection_method_param);
1520 *usable_protocols &= OFPUTIL_P_OF15_UP;
1521 } else if (!strcmp(name, "fields")) {
1522 if (!(fields & F_GROUP_TYPE)) {
1523 error = xstrdup("fields are not needed");
1526 error = parse_select_group_field(value, &gm->props.fields,
1531 *usable_protocols &= OFPUTIL_P_OF15_UP;
1533 error = xasprintf("unknown keyword %s", name);
1537 if (gm->group_id == OFPG_ANY) {
1538 error = xstrdup("must specify a group_id");
1541 if (fields & F_GROUP_TYPE && !had_type) {
1542 error = xstrdup("must specify a type");
1546 if (fields & F_COMMAND_BUCKET_ID) {
1547 if (!(fields & F_COMMAND_BUCKET_ID_ALL || had_command_bucket_id)) {
1548 error = xstrdup("must specify a command bucket id");
1551 } else if (had_command_bucket_id) {
1552 error = xstrdup("command bucket id is not needed");
1556 /* Now parse the buckets, if any. */
1560 bkt_str = strchr(bkt_str + 1, '=');
1562 error = xstrdup("must specify bucket content");
1567 next_bkt_str = strstr(bkt_str, "bucket=");
1569 *next_bkt_str = '\0';
1572 bucket = xzalloc(sizeof(struct ofputil_bucket));
1573 error = parse_bucket_str(bucket, bkt_str, gm->type, usable_protocols);
1578 list_push_back(&gm->buckets, &bucket->list_node);
1580 if (gm->type != OFPGT11_SELECT && bucket->weight) {
1581 error = xstrdup("Only select groups can have bucket weights.");
1585 bkt_str = next_bkt_str;
1587 if (gm->type == OFPGT11_INDIRECT && !list_is_short(&gm->buckets)) {
1588 error = xstrdup("Indirect groups can have at most one bucket.");
1594 ofputil_bucket_list_destroy(&gm->buckets);
1598 char * OVS_WARN_UNUSED_RESULT
1599 parse_ofp_group_mod_str(struct ofputil_group_mod *gm, uint16_t command,
1601 enum ofputil_protocol *usable_protocols)
1603 char *string = xstrdup(str_);
1604 char *error = parse_ofp_group_mod_str__(gm, command, string,
1609 ofputil_bucket_list_destroy(&gm->buckets);
1614 char * OVS_WARN_UNUSED_RESULT
1615 parse_ofp_group_mod_file(const char *file_name, uint16_t command,
1616 struct ofputil_group_mod **gms, size_t *n_gms,
1617 enum ofputil_protocol *usable_protocols)
1619 size_t allocated_gms;
1627 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1628 if (stream == NULL) {
1629 return xasprintf("%s: open failed (%s)",
1630 file_name, ovs_strerror(errno));
1633 allocated_gms = *n_gms;
1636 *usable_protocols = OFPUTIL_P_OF11_UP;
1637 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
1638 enum ofputil_protocol usable;
1641 if (*n_gms >= allocated_gms) {
1642 struct ofputil_group_mod *new_gms;
1645 new_gms = x2nrealloc(*gms, &allocated_gms, sizeof **gms);
1646 for (i = 0; i < *n_gms; i++) {
1647 list_moved(&new_gms[i].buckets, &(*gms)[i].buckets);
1651 error = parse_ofp_group_mod_str(&(*gms)[*n_gms], command, ds_cstr(&s),
1656 for (i = 0; i < *n_gms; i++) {
1657 ofputil_bucket_list_destroy(&(*gms)[i].buckets);
1664 if (stream != stdin) {
1668 return xasprintf("%s:%d: %s", file_name, line_number, error);
1670 *usable_protocols &= usable;
1675 if (stream != stdin) {
1681 char * OVS_WARN_UNUSED_RESULT
1682 parse_ofp_tlv_table_mod_str(struct ofputil_tlv_table_mod *ttm,
1683 uint16_t command, const char *s,
1684 enum ofputil_protocol *usable_protocols)
1686 *usable_protocols = OFPUTIL_P_NXM_OXM_ANY;
1688 ttm->command = command;
1689 list_init(&ttm->mappings);
1692 struct ofputil_tlv_map *map = xmalloc(sizeof *map);
1699 list_push_back(&ttm->mappings, &map->list_node);
1701 if (!ovs_scan(s, "{class=%"SCNi16",type=%"SCNi8",len=%"SCNi8"}->tun_metadata%"SCNi16"%n",
1702 &map->option_class, &map->option_type, &map->option_len,
1704 ofputil_uninit_tlv_table(&ttm->mappings);
1705 return xstrdup("invalid tlv mapping");