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"
25 #include "byte-order.h"
26 #include "dynamic-string.h"
28 #include "meta-flow.h"
29 #include "multipath.h"
32 #include "ofp-actions.h"
35 #include "openflow/openflow.h"
36 #include "ovs-thread.h"
39 #include "socket-util.h"
40 #include "openvswitch/vconn.h"
42 /* Parses 'str' as an 8-bit unsigned integer into '*valuep'.
44 * 'name' describes the value parsed in an error message, if any.
46 * Returns NULL if successful, otherwise a malloc()'d string describing the
47 * error. The caller is responsible for freeing the returned string. */
48 char * OVS_WARN_UNUSED_RESULT
49 str_to_u8(const char *str, const char *name, uint8_t *valuep)
53 if (!str_to_int(str, 0, &value) || value < 0 || value > 255) {
54 return xasprintf("invalid %s \"%s\"", name, str);
60 /* Parses 'str' as a 16-bit unsigned integer into '*valuep'.
62 * 'name' describes the value parsed in an error message, if any.
64 * Returns NULL if successful, otherwise a malloc()'d string describing the
65 * error. The caller is responsible for freeing the returned string. */
66 char * OVS_WARN_UNUSED_RESULT
67 str_to_u16(const char *str, const char *name, uint16_t *valuep)
71 if (!str_to_int(str, 0, &value) || value < 0 || value > 65535) {
72 return xasprintf("invalid %s \"%s\"", name, str);
78 /* Parses 'str' as a 32-bit unsigned integer into '*valuep'.
80 * Returns NULL if successful, otherwise a malloc()'d string describing the
81 * error. The caller is responsible for freeing the returned string. */
82 char * OVS_WARN_UNUSED_RESULT
83 str_to_u32(const char *str, uint32_t *valuep)
89 return xstrdup("missing required numeric argument");
93 value = strtoul(str, &tail, 0);
94 if (errno == EINVAL || errno == ERANGE || *tail) {
95 return xasprintf("invalid numeric format %s", str);
101 /* Parses 'str' as an 64-bit unsigned integer into '*valuep'.
103 * Returns NULL if successful, otherwise a malloc()'d string describing the
104 * error. The caller is responsible for freeing the returned string. */
105 char * OVS_WARN_UNUSED_RESULT
106 str_to_u64(const char *str, uint64_t *valuep)
112 return xstrdup("missing required numeric argument");
116 value = strtoull(str, &tail, 0);
117 if (errno == EINVAL || errno == ERANGE || *tail) {
118 return xasprintf("invalid numeric format %s", str);
124 /* Parses 'str' as an 64-bit unsigned integer in network byte order into
127 * Returns NULL if successful, otherwise a malloc()'d string describing the
128 * error. The caller is responsible for freeing the returned string. */
129 char * OVS_WARN_UNUSED_RESULT
130 str_to_be64(const char *str, ovs_be64 *valuep)
135 error = str_to_u64(str, &value);
137 *valuep = htonll(value);
142 /* Parses 'str' as an Ethernet address into 'mac'.
144 * Returns NULL if successful, otherwise a malloc()'d string describing the
145 * error. The caller is responsible for freeing the returned string. */
146 char * OVS_WARN_UNUSED_RESULT
147 str_to_mac(const char *str, struct eth_addr *mac)
149 if (!ovs_scan(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(*mac))) {
150 return xasprintf("invalid mac address %s", str);
155 /* Parses 'str' as an IP address into '*ip'.
157 * Returns NULL if successful, otherwise a malloc()'d string describing the
158 * error. The caller is responsible for freeing the returned string. */
159 char * OVS_WARN_UNUSED_RESULT
160 str_to_ip(const char *str, ovs_be32 *ip)
162 struct in_addr in_addr;
164 if (lookup_ip(str, &in_addr)) {
165 return xasprintf("%s: could not convert to IP address", str);
167 *ip = in_addr.s_addr;
178 parse_protocol(const char *name, const struct protocol **p_out)
180 static const struct protocol protocols[] = {
181 { "ip", ETH_TYPE_IP, 0 },
182 { "ipv4", ETH_TYPE_IP, 0 },
183 { "ip4", ETH_TYPE_IP, 0 },
184 { "arp", ETH_TYPE_ARP, 0 },
185 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
186 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
187 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
188 { "sctp", ETH_TYPE_IP, IPPROTO_SCTP },
189 { "ipv6", ETH_TYPE_IPV6, 0 },
190 { "ip6", ETH_TYPE_IPV6, 0 },
191 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
192 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
193 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
194 { "sctp6", ETH_TYPE_IPV6, IPPROTO_SCTP },
195 { "rarp", ETH_TYPE_RARP, 0},
196 { "mpls", ETH_TYPE_MPLS, 0 },
197 { "mplsm", ETH_TYPE_MPLS_MCAST, 0 },
199 const struct protocol *p;
201 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
202 if (!strcmp(p->name, name)) {
211 /* Parses 's' as the (possibly masked) value of field 'mf', and updates
212 * 'match' appropriately. Restricts the set of usable protocols to ones
213 * supporting the parsed field.
215 * Returns NULL if successful, otherwise a malloc()'d string describing the
216 * error. The caller is responsible for freeing the returned string. */
217 static char * OVS_WARN_UNUSED_RESULT
218 parse_field(const struct mf_field *mf, const char *s, struct match *match,
219 enum ofputil_protocol *usable_protocols)
221 union mf_value value, mask;
224 error = mf_parse(mf, s, &value, &mask);
226 *usable_protocols &= mf_set(mf, &value, &mask, match);
232 extract_actions(char *s)
234 s = strstr(s, "action");
237 s = strchr(s + 1, '=');
238 return s ? s + 1 : NULL;
245 static char * OVS_WARN_UNUSED_RESULT
246 parse_ofp_str__(struct ofputil_flow_mod *fm, int command, char *string,
247 enum ofputil_protocol *usable_protocols)
252 F_IMPORTANCE = 1 << 2,
257 char *save_ptr = NULL;
258 char *act_str = NULL;
261 *usable_protocols = OFPUTIL_P_ANY;
266 string += strspn(string, " \t\r\n"); /* Skip white space. */
267 len = strcspn(string, ", \t\r\n"); /* Get length of the first token. */
269 if (!strncmp(string, "add", len)) {
271 } else if (!strncmp(string, "delete", len)) {
272 command = OFPFC_DELETE;
273 } else if (!strncmp(string, "delete_strict", len)) {
274 command = OFPFC_DELETE_STRICT;
275 } else if (!strncmp(string, "modify", len)) {
276 command = OFPFC_MODIFY;
277 } else if (!strncmp(string, "modify_strict", len)) {
278 command = OFPFC_MODIFY_STRICT;
292 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS | F_IMPORTANCE;
299 case OFPFC_DELETE_STRICT:
300 fields = F_OUT_PORT | F_PRIORITY;
304 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
307 case OFPFC_MODIFY_STRICT:
308 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
315 match_init_catchall(&fm->match);
316 fm->priority = OFP_DEFAULT_PRIORITY;
317 fm->cookie = htonll(0);
318 fm->cookie_mask = htonll(0);
319 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
320 /* For modify, by default, don't update the cookie. */
321 fm->new_cookie = OVS_BE64_MAX;
323 fm->new_cookie = htonll(0);
325 fm->modify_cookie = false;
327 fm->command = command;
328 fm->idle_timeout = OFP_FLOW_PERMANENT;
329 fm->hard_timeout = OFP_FLOW_PERMANENT;
330 fm->buffer_id = UINT32_MAX;
331 fm->out_port = OFPP_ANY;
334 fm->out_group = OFPG11_ANY;
335 fm->delete_reason = OFPRR_DELETE;
336 if (fields & F_ACTIONS) {
337 act_str = extract_actions(string);
339 return xstrdup("must specify an action");
342 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
343 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
344 const struct protocol *p;
347 if (parse_protocol(name, &p)) {
348 match_set_dl_type(&fm->match, htons(p->dl_type));
350 match_set_nw_proto(&fm->match, p->nw_proto);
352 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
353 fm->flags |= OFPUTIL_FF_SEND_FLOW_REM;
354 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
355 fm->flags |= OFPUTIL_FF_CHECK_OVERLAP;
356 } else if (fields & F_FLAGS && !strcmp(name, "reset_counts")) {
357 fm->flags |= OFPUTIL_FF_RESET_COUNTS;
358 *usable_protocols &= OFPUTIL_P_OF12_UP;
359 } else if (fields & F_FLAGS && !strcmp(name, "no_packet_counts")) {
360 fm->flags |= OFPUTIL_FF_NO_PKT_COUNTS;
361 *usable_protocols &= OFPUTIL_P_OF13_UP;
362 } else if (fields & F_FLAGS && !strcmp(name, "no_byte_counts")) {
363 fm->flags |= OFPUTIL_FF_NO_BYT_COUNTS;
364 *usable_protocols &= OFPUTIL_P_OF13_UP;
365 } else if (!strcmp(name, "no_readonly_table")
366 || !strcmp(name, "allow_hidden_fields")) {
367 /* ignore these fields. */
368 } else if (mf_from_name(name)) {
371 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
373 /* If there's no value, we're just trying to match on the
374 * existence of the field, so use a no-op value. */
378 error = parse_field(mf_from_name(name), value, &fm->match,
386 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
388 return xasprintf("field %s missing value", name);
391 if (!strcmp(name, "table")) {
392 error = str_to_u8(value, "table", &fm->table_id);
393 if (fm->table_id != 0xff) {
394 *usable_protocols &= OFPUTIL_P_TID;
396 } else if (fields & F_OUT_PORT && !strcmp(name, "out_port")) {
397 if (!ofputil_port_from_string(value, &fm->out_port)) {
398 error = xasprintf("%s is not a valid OpenFlow port",
401 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
402 uint16_t priority = 0;
404 error = str_to_u16(value, name, &priority);
405 fm->priority = priority;
406 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
407 error = str_to_u16(value, name, &fm->idle_timeout);
408 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
409 error = str_to_u16(value, name, &fm->hard_timeout);
410 } else if (fields & F_IMPORTANCE && !strcmp(name, "importance")) {
411 error = str_to_u16(value, name, &fm->importance);
412 } else if (!strcmp(name, "cookie")) {
413 char *mask = strchr(value, '/');
416 /* A mask means we're searching for a cookie. */
417 if (command == OFPFC_ADD) {
418 return xstrdup("flow additions cannot use "
422 error = str_to_be64(value, &fm->cookie);
426 error = str_to_be64(mask + 1, &fm->cookie_mask);
428 /* Matching of the cookie is only supported through NXM or
430 if (fm->cookie_mask != htonll(0)) {
431 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
434 /* No mask means that the cookie is being set. */
435 if (command != OFPFC_ADD && command != OFPFC_MODIFY
436 && command != OFPFC_MODIFY_STRICT) {
437 return xstrdup("cannot set cookie");
439 error = str_to_be64(value, &fm->new_cookie);
440 fm->modify_cookie = true;
442 } else if (!strcmp(name, "duration")
443 || !strcmp(name, "n_packets")
444 || !strcmp(name, "n_bytes")
445 || !strcmp(name, "idle_age")
446 || !strcmp(name, "hard_age")) {
447 /* Ignore these, so that users can feed the output of
448 * "ovs-ofctl dump-flows" back into commands that parse
451 error = xasprintf("unknown keyword %s", name);
459 /* Check for usable protocol interdependencies between match fields. */
460 if (fm->match.flow.dl_type == htons(ETH_TYPE_IPV6)) {
461 const struct flow_wildcards *wc = &fm->match.wc;
462 /* Only NXM and OXM support matching L3 and L4 fields within IPv6.
464 * (IPv6 specific fields as well as arp_sha, arp_tha, nw_frag, and
465 * nw_ttl are covered elsewhere so they don't need to be included in
468 if (wc->masks.nw_proto || wc->masks.nw_tos
469 || wc->masks.tp_src || wc->masks.tp_dst) {
470 *usable_protocols &= OFPUTIL_P_NXM_OXM_ANY;
473 if (!fm->cookie_mask && fm->new_cookie == OVS_BE64_MAX
474 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
475 /* On modifies without a mask, we are supposed to add a flow if
476 * one does not exist. If a cookie wasn't been specified, use a
477 * default of zero. */
478 fm->new_cookie = htonll(0);
480 if (fields & F_ACTIONS) {
481 enum ofputil_protocol action_usable_protocols;
482 struct ofpbuf ofpacts;
485 ofpbuf_init(&ofpacts, 32);
486 error = ofpacts_parse_instructions(act_str, &ofpacts,
487 &action_usable_protocols);
488 *usable_protocols &= action_usable_protocols;
492 err = ofpacts_check(ofpacts.data, ofpacts.size, &fm->match.flow,
493 OFPP_MAX, fm->table_id, 255, usable_protocols);
494 if (!err && !*usable_protocols) {
495 err = OFPERR_OFPBAC_MATCH_INCONSISTENT;
498 error = xasprintf("actions are invalid with specified match "
499 "(%s)", ofperr_to_string(err));
504 ofpbuf_uninit(&ofpacts);
508 fm->ofpacts_len = ofpacts.size;
509 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
518 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
519 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
520 * Returns the set of usable protocols in '*usable_protocols'.
522 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
523 * constant for 'command'. To parse syntax for an OFPST_FLOW or
524 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'.
526 * If 'command' is given as -2, 'str_' may begin with a command name ("add",
527 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
528 * name is treated as "add".
530 * Returns NULL if successful, otherwise a malloc()'d string describing the
531 * error. The caller is responsible for freeing the returned string. */
532 char * OVS_WARN_UNUSED_RESULT
533 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
534 enum ofputil_protocol *usable_protocols)
536 char *string = xstrdup(str_);
539 error = parse_ofp_str__(fm, command, string, usable_protocols);
549 static char * OVS_WARN_UNUSED_RESULT
550 parse_ofp_meter_mod_str__(struct ofputil_meter_mod *mm, char *string,
551 struct ofpbuf *bands, int command,
552 enum ofputil_protocol *usable_protocols)
559 char *save_ptr = NULL;
560 char *band_str = NULL;
563 /* Meters require at least OF 1.3. */
564 *usable_protocols = OFPUTIL_P_OF13_UP;
572 fields = F_METER | F_FLAGS | F_BANDS;
580 fields = F_METER | F_FLAGS | F_BANDS;
587 mm->command = command;
588 mm->meter.meter_id = 0;
590 if (fields & F_BANDS) {
591 band_str = strstr(string, "band");
593 return xstrdup("must specify bands");
597 band_str = strchr(band_str + 1, '=');
599 return xstrdup("must specify bands");
604 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
605 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
607 if (fields & F_FLAGS && !strcmp(name, "kbps")) {
608 mm->meter.flags |= OFPMF13_KBPS;
609 } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
610 mm->meter.flags |= OFPMF13_PKTPS;
611 } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
612 mm->meter.flags |= OFPMF13_BURST;
613 } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
614 mm->meter.flags |= OFPMF13_STATS;
618 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
620 return xasprintf("field %s missing value", name);
623 if (!strcmp(name, "meter")) {
624 if (!strcmp(value, "all")) {
625 mm->meter.meter_id = OFPM13_ALL;
626 } else if (!strcmp(value, "controller")) {
627 mm->meter.meter_id = OFPM13_CONTROLLER;
628 } else if (!strcmp(value, "slowpath")) {
629 mm->meter.meter_id = OFPM13_SLOWPATH;
631 char *error = str_to_u32(value, &mm->meter.meter_id);
635 if (mm->meter.meter_id > OFPM13_MAX
636 || !mm->meter.meter_id) {
637 return xasprintf("invalid value for %s", name);
641 return xasprintf("unknown keyword %s", name);
645 if (fields & F_METER && !mm->meter.meter_id) {
646 return xstrdup("must specify 'meter'");
648 if (fields & F_FLAGS && !mm->meter.flags) {
649 return xstrdup("meter must specify either 'kbps' or 'pktps'");
652 if (fields & F_BANDS) {
653 uint16_t n_bands = 0;
654 struct ofputil_meter_band *band = NULL;
657 for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
658 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
662 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
664 return xasprintf("field %s missing value", name);
667 if (!strcmp(name, "type")) {
668 /* Start a new band */
669 band = ofpbuf_put_zeros(bands, sizeof *band);
672 if (!strcmp(value, "drop")) {
673 band->type = OFPMBT13_DROP;
674 } else if (!strcmp(value, "dscp_remark")) {
675 band->type = OFPMBT13_DSCP_REMARK;
677 return xasprintf("field %s unknown value %s", name, value);
679 } else if (!band || !band->type) {
680 return xstrdup("band must start with the 'type' keyword");
681 } else if (!strcmp(name, "rate")) {
682 char *error = str_to_u32(value, &band->rate);
686 } else if (!strcmp(name, "burst_size")) {
687 char *error = str_to_u32(value, &band->burst_size);
691 } else if (!strcmp(name, "prec_level")) {
692 char *error = str_to_u8(value, name, &band->prec_level);
697 return xasprintf("unknown keyword %s", name);
702 return xstrdup("meter must have bands");
705 mm->meter.n_bands = n_bands;
706 mm->meter.bands = ofpbuf_steal_data(bands);
708 for (i = 0; i < n_bands; ++i) {
709 band = &mm->meter.bands[i];
712 return xstrdup("band must have 'type'");
714 if (band->type == OFPMBT13_DSCP_REMARK) {
715 if (!band->prec_level) {
716 return xstrdup("'dscp_remark' band must have"
720 if (band->prec_level) {
721 return xstrdup("Only 'dscp_remark' band may have"
726 return xstrdup("band must have 'rate'");
728 if (mm->meter.flags & OFPMF13_BURST) {
729 if (!band->burst_size) {
730 return xstrdup("band must have 'burst_size' "
731 "when 'burst' flag is set");
734 if (band->burst_size) {
735 return xstrdup("band may have 'burst_size' only "
736 "when 'burst' flag is set");
741 mm->meter.n_bands = 0;
742 mm->meter.bands = NULL;
748 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
749 * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
751 * Returns NULL if successful, otherwise a malloc()'d string describing the
752 * error. The caller is responsible for freeing the returned string. */
753 char * OVS_WARN_UNUSED_RESULT
754 parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
755 int command, enum ofputil_protocol *usable_protocols)
761 ofpbuf_init(&bands, 64);
762 string = xstrdup(str_);
764 error = parse_ofp_meter_mod_str__(mm, string, &bands, command,
768 ofpbuf_uninit(&bands);
773 static char * OVS_WARN_UNUSED_RESULT
774 parse_flow_monitor_request__(struct ofputil_flow_monitor_request *fmr,
775 const char *str_, char *string,
776 enum ofputil_protocol *usable_protocols)
778 static atomic_count id = ATOMIC_COUNT_INIT(0);
779 char *save_ptr = NULL;
782 fmr->id = atomic_count_inc(&id);
784 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
785 | NXFMF_OWN | NXFMF_ACTIONS);
786 fmr->out_port = OFPP_NONE;
787 fmr->table_id = 0xff;
788 match_init_catchall(&fmr->match);
790 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
791 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
792 const struct protocol *p;
794 if (!strcmp(name, "!initial")) {
795 fmr->flags &= ~NXFMF_INITIAL;
796 } else if (!strcmp(name, "!add")) {
797 fmr->flags &= ~NXFMF_ADD;
798 } else if (!strcmp(name, "!delete")) {
799 fmr->flags &= ~NXFMF_DELETE;
800 } else if (!strcmp(name, "!modify")) {
801 fmr->flags &= ~NXFMF_MODIFY;
802 } else if (!strcmp(name, "!actions")) {
803 fmr->flags &= ~NXFMF_ACTIONS;
804 } else if (!strcmp(name, "!own")) {
805 fmr->flags &= ~NXFMF_OWN;
806 } else if (parse_protocol(name, &p)) {
807 match_set_dl_type(&fmr->match, htons(p->dl_type));
809 match_set_nw_proto(&fmr->match, p->nw_proto);
814 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
816 return xasprintf("%s: field %s missing value", str_, name);
819 if (!strcmp(name, "table")) {
820 char *error = str_to_u8(value, "table", &fmr->table_id);
824 } else if (!strcmp(name, "out_port")) {
825 fmr->out_port = u16_to_ofp(atoi(value));
826 } else if (mf_from_name(name)) {
829 error = parse_field(mf_from_name(name), value, &fmr->match,
835 return xasprintf("%s: unknown keyword %s", str_, name);
842 /* Convert 'str_' (as described in the documentation for the "monitor" command
843 * in the ovs-ofctl man page) into 'fmr'.
845 * Returns NULL if successful, otherwise a malloc()'d string describing the
846 * error. The caller is responsible for freeing the returned string. */
847 char * OVS_WARN_UNUSED_RESULT
848 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
850 enum ofputil_protocol *usable_protocols)
852 char *string = xstrdup(str_);
853 char *error = parse_flow_monitor_request__(fmr, str_, string,
859 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
860 * (one of OFPFC_*) into 'fm'.
862 * If 'command' is given as -2, 'string' may begin with a command name ("add",
863 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
864 * name is treated as "add".
866 * Returns NULL if successful, otherwise a malloc()'d string describing the
867 * error. The caller is responsible for freeing the returned string. */
868 char * OVS_WARN_UNUSED_RESULT
869 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
871 enum ofputil_protocol *usable_protocols)
873 char *error = parse_ofp_str(fm, command, string, usable_protocols);
876 /* Normalize a copy of the match. This ensures that non-normalized
877 * flows get logged but doesn't affect what gets sent to the switch, so
878 * that the switch can do whatever it likes with the flow. */
879 struct match match_copy = fm->match;
880 ofputil_normalize_match(&match_copy);
886 /* Convert 'table_id' and 'setting' (as described for the "mod-table" command
887 * in the ovs-ofctl man page) into 'tm' for sending a table_mod command to a
890 * Stores a bitmap of the OpenFlow versions that are usable for 'tm' into
891 * '*usable_versions'.
893 * Returns NULL if successful, otherwise a malloc()'d string describing the
894 * error. The caller is responsible for freeing the returned string. */
895 char * OVS_WARN_UNUSED_RESULT
896 parse_ofp_table_mod(struct ofputil_table_mod *tm, const char *table_id,
897 const char *setting, uint32_t *usable_versions)
899 *usable_versions = 0;
900 if (!strcasecmp(table_id, "all")) {
901 tm->table_id = OFPTT_ALL;
903 char *error = str_to_u8(table_id, "table_id", &tm->table_id);
909 tm->miss = OFPUTIL_TABLE_MISS_DEFAULT;
910 tm->eviction = OFPUTIL_TABLE_EVICTION_DEFAULT;
911 tm->eviction_flags = UINT32_MAX;
913 /* Only OpenFlow 1.1 and 1.2 can configure table-miss via table_mod.
914 * Only OpenFlow 1.4+ can configure eviction via table_mod.
916 * (OpenFlow 1.4+ can also configure vacancy events via table_mod, but OVS
917 * doesn't support those yet and they're also logically a per-OpenFlow
918 * session setting so it wouldn't make sense to support them here anyway.)
920 if (!strcmp(setting, "controller")) {
921 tm->miss = OFPUTIL_TABLE_MISS_CONTROLLER;
922 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
923 } else if (!strcmp(setting, "continue")) {
924 tm->miss = OFPUTIL_TABLE_MISS_CONTINUE;
925 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
926 } else if (!strcmp(setting, "drop")) {
927 tm->miss = OFPUTIL_TABLE_MISS_DROP;
928 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
929 } else if (!strcmp(setting, "evict")) {
930 tm->eviction = OFPUTIL_TABLE_EVICTION_ON;
931 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
932 } else if (!strcmp(setting, "noevict")) {
933 tm->eviction = OFPUTIL_TABLE_EVICTION_OFF;
934 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
936 return xasprintf("invalid table_mod setting %s", setting);
939 if (tm->table_id == 0xfe
940 && tm->miss == OFPUTIL_TABLE_MISS_CONTINUE) {
941 return xstrdup("last table's flow miss handling can not be continue");
948 /* Opens file 'file_name' and reads each line as a flow_mod of the specified
949 * type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
950 * on the caller's behalf, and the number of flow_mods in '*n_fms'.
952 * If 'command' is given as -2, each line may start with a command name
953 * ("add", "modify", "delete", "modify_strict", or "delete_strict"). A missing
954 * command name is treated as "add".
956 * Returns NULL if successful, otherwise a malloc()'d string describing the
957 * error. The caller is responsible for freeing the returned string. */
958 char * OVS_WARN_UNUSED_RESULT
959 parse_ofp_flow_mod_file(const char *file_name, int command,
960 struct ofputil_flow_mod **fms, size_t *n_fms,
961 enum ofputil_protocol *usable_protocols)
963 size_t allocated_fms;
968 *usable_protocols = OFPUTIL_P_ANY;
973 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
974 if (stream == NULL) {
975 return xasprintf("%s: open failed (%s)",
976 file_name, ovs_strerror(errno));
979 allocated_fms = *n_fms;
982 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
984 enum ofputil_protocol usable;
986 if (*n_fms >= allocated_fms) {
987 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
989 error = parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command,
994 for (i = 0; i < *n_fms; i++) {
995 free(CONST_CAST(struct ofpact *, (*fms)[i].ofpacts));
1002 if (stream != stdin) {
1006 return xasprintf("%s:%d: %s", file_name, line_number, error);
1008 *usable_protocols &= usable; /* Each line can narrow the set. */
1013 if (stream != stdin) {
1019 char * OVS_WARN_UNUSED_RESULT
1020 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1021 bool aggregate, const char *string,
1022 enum ofputil_protocol *usable_protocols)
1024 struct ofputil_flow_mod fm;
1027 error = parse_ofp_str(&fm, -1, string, usable_protocols);
1032 /* Special table ID support not required for stats requests. */
1033 if (*usable_protocols & OFPUTIL_P_OF10_STD_TID) {
1034 *usable_protocols |= OFPUTIL_P_OF10_STD;
1036 if (*usable_protocols & OFPUTIL_P_OF10_NXM_TID) {
1037 *usable_protocols |= OFPUTIL_P_OF10_NXM;
1040 fsr->aggregate = aggregate;
1041 fsr->cookie = fm.cookie;
1042 fsr->cookie_mask = fm.cookie_mask;
1043 fsr->match = fm.match;
1044 fsr->out_port = fm.out_port;
1045 fsr->out_group = fm.out_group;
1046 fsr->table_id = fm.table_id;
1050 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1051 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1052 * mf_field. Fields must be specified in a natural order for satisfying
1053 * prerequisites. If 'mask' is specified, fills the mask field for each of the
1054 * field specified in flow. If the map, 'names_portno' is specfied, converts
1055 * the in_port name into port no while setting the 'flow'.
1057 * Returns NULL on success, otherwise a malloc()'d string that explains the
1060 parse_ofp_exact_flow(struct flow *flow, struct flow *mask, const char *s,
1061 const struct simap *portno_names)
1063 char *pos, *key, *value_s;
1067 memset(flow, 0, sizeof *flow);
1069 memset(mask, 0, sizeof *mask);
1072 pos = copy = xstrdup(s);
1073 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
1074 const struct protocol *p;
1075 if (parse_protocol(key, &p)) {
1076 if (flow->dl_type) {
1077 error = xasprintf("%s: Ethernet type set multiple times", s);
1080 flow->dl_type = htons(p->dl_type);
1082 mask->dl_type = OVS_BE16_MAX;
1086 if (flow->nw_proto) {
1087 error = xasprintf("%s: network protocol set "
1088 "multiple times", s);
1091 flow->nw_proto = p->nw_proto;
1093 mask->nw_proto = UINT8_MAX;
1097 const struct mf_field *mf;
1098 union mf_value value;
1101 mf = mf_from_name(key);
1103 error = xasprintf("%s: unknown field %s", s, key);
1107 if (!mf_are_prereqs_ok(mf, flow)) {
1108 error = xasprintf("%s: prerequisites not met for setting %s",
1113 if (mf_is_set(mf, flow)) {
1114 error = xasprintf("%s: field %s set multiple times", s, key);
1118 if (!strcmp(key, "in_port")
1120 && simap_contains(portno_names, value_s)) {
1121 flow->in_port.ofp_port = u16_to_ofp(
1122 simap_get(portno_names, value_s));
1124 mask->in_port.ofp_port = u16_to_ofp(ntohs(OVS_BE16_MAX));
1127 field_error = mf_parse_value(mf, value_s, &value);
1129 error = xasprintf("%s: bad value for %s (%s)",
1130 s, key, field_error);
1135 mf_set_flow_value(mf, &value, flow);
1137 mf_mask_field(mf, mask);
1143 if (!flow->in_port.ofp_port) {
1144 flow->in_port.ofp_port = OFPP_NONE;
1151 memset(flow, 0, sizeof *flow);
1153 memset(mask, 0, sizeof *mask);
1159 static char * OVS_WARN_UNUSED_RESULT
1160 parse_bucket_str(struct ofputil_bucket *bucket, char *str_, uint8_t group_type,
1161 enum ofputil_protocol *usable_protocols)
1163 char *pos, *key, *value;
1164 struct ofpbuf ofpacts;
1168 bucket->weight = group_type == OFPGT11_SELECT ? 1 : 0;
1169 bucket->bucket_id = OFPG15_BUCKET_ALL;
1170 bucket->watch_port = OFPP_ANY;
1171 bucket->watch_group = OFPG11_ANY;
1177 while (ofputil_parse_key_value(&pos, &key, &value)) {
1178 if (!strcasecmp(key, "weight")) {
1179 error = str_to_u16(value, "weight", &bucket->weight);
1180 } else if (!strcasecmp(key, "watch_port")) {
1181 if (!ofputil_port_from_string(value, &bucket->watch_port)
1182 || (ofp_to_u16(bucket->watch_port) >= ofp_to_u16(OFPP_MAX)
1183 && bucket->watch_port != OFPP_ANY)) {
1184 error = xasprintf("%s: invalid watch_port", value);
1186 } else if (!strcasecmp(key, "watch_group")) {
1187 error = str_to_u32(value, &bucket->watch_group);
1188 if (!error && bucket->watch_group > OFPG_MAX) {
1189 error = xasprintf("invalid watch_group id %"PRIu32,
1190 bucket->watch_group);
1192 } else if (!strcasecmp(key, "bucket_id")) {
1193 error = str_to_u32(value, &bucket->bucket_id);
1194 if (!error && bucket->bucket_id > OFPG15_BUCKET_MAX) {
1195 error = xasprintf("invalid bucket_id id %"PRIu32,
1198 *usable_protocols &= OFPUTIL_P_OF15_UP;
1199 } else if (!strcasecmp(key, "action") || !strcasecmp(key, "actions")) {
1200 ds_put_format(&actions, "%s,", value);
1202 ds_put_format(&actions, "%s(%s),", key, value);
1206 ds_destroy(&actions);
1211 if (!actions.length) {
1212 return xstrdup("bucket must specify actions");
1214 ds_chomp(&actions, ',');
1216 ofpbuf_init(&ofpacts, 0);
1217 error = ofpacts_parse_actions(ds_cstr(&actions), &ofpacts,
1219 ds_destroy(&actions);
1221 ofpbuf_uninit(&ofpacts);
1224 bucket->ofpacts = ofpacts.data;
1225 bucket->ofpacts_len = ofpacts.size;
1230 static char * OVS_WARN_UNUSED_RESULT
1231 parse_select_group_field(char *s, struct field_array *fa,
1232 enum ofputil_protocol *usable_protocols)
1234 char *save_ptr = NULL;
1237 for (name = strtok_r(s, "=, \t\r\n", &save_ptr); name;
1238 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1239 const struct mf_field *mf = mf_from_name(name);
1243 const char *value_str;
1244 union mf_value value;
1246 if (bitmap_is_set(fa->used.bm, mf->id)) {
1247 return xasprintf("%s: duplicate field", name);
1250 value_str = strtok_r(NULL, ", \t\r\n", &save_ptr);
1252 error = mf_parse_value(mf, value_str, &value);
1257 /* The mask cannot be all-zeros */
1258 if (!mf_is_tun_metadata(mf) &&
1259 is_all_zeros(&value, mf->n_bytes)) {
1260 return xasprintf("%s: values are wildcards here "
1261 "and must not be all-zeros", s);
1264 /* The values parsed are masks for fields used
1265 * by the selection method */
1266 if (!mf_is_mask_valid(mf, &value)) {
1267 return xasprintf("%s: invalid mask for field %s",
1268 value_str, mf->name);
1271 memset(&value, 0xff, mf->n_bytes);
1274 field_array_set(mf->id, &value, fa);
1276 if (is_all_ones(&value, mf->n_bytes)) {
1277 *usable_protocols &= mf->usable_protocols_exact;
1278 } else if (mf->usable_protocols_bitwise == mf->usable_protocols_cidr
1279 || ip_is_cidr(value.be32)) {
1280 *usable_protocols &= mf->usable_protocols_cidr;
1282 *usable_protocols &= mf->usable_protocols_bitwise;
1285 return xasprintf("%s: unknown field %s", s, name);
1292 static char * OVS_WARN_UNUSED_RESULT
1293 parse_ofp_group_mod_str__(struct ofputil_group_mod *gm, uint16_t command,
1295 enum ofputil_protocol *usable_protocols)
1298 F_GROUP_TYPE = 1 << 0,
1300 F_COMMAND_BUCKET_ID = 1 << 2,
1301 F_COMMAND_BUCKET_ID_ALL = 1 << 3,
1303 char *save_ptr = NULL;
1304 bool had_type = false;
1305 bool had_command_bucket_id = false;
1307 struct ofputil_bucket *bucket;
1310 *usable_protocols = OFPUTIL_P_OF11_UP;
1314 fields = F_GROUP_TYPE | F_BUCKETS;
1317 case OFPGC11_DELETE:
1321 case OFPGC11_MODIFY:
1322 fields = F_GROUP_TYPE | F_BUCKETS;
1325 case OFPGC15_INSERT_BUCKET:
1326 fields = F_BUCKETS | F_COMMAND_BUCKET_ID;
1327 *usable_protocols &= OFPUTIL_P_OF15_UP;
1330 case OFPGC15_REMOVE_BUCKET:
1331 fields = F_COMMAND_BUCKET_ID | F_COMMAND_BUCKET_ID_ALL;
1332 *usable_protocols &= OFPUTIL_P_OF15_UP;
1339 memset(gm, 0, sizeof *gm);
1340 gm->command = command;
1341 gm->group_id = OFPG_ANY;
1342 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1343 list_init(&gm->buckets);
1344 if (command == OFPGC11_DELETE && string[0] == '\0') {
1345 gm->group_id = OFPG_ALL;
1349 *usable_protocols = OFPUTIL_P_OF11_UP;
1351 /* Strip the buckets off the end of 'string', if there are any, saving a
1352 * pointer for later. We want to parse the buckets last because the bucket
1353 * type influences bucket defaults. */
1354 char *bkt_str = strstr(string, "bucket=");
1356 if (!(fields & F_BUCKETS)) {
1357 error = xstrdup("bucket is not needed");
1363 /* Parse everything before the buckets. */
1364 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1365 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1368 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1370 error = xasprintf("field %s missing value", name);
1374 if (!strcmp(name, "command_bucket_id")) {
1375 if (!(fields & F_COMMAND_BUCKET_ID)) {
1376 error = xstrdup("command bucket id is not needed");
1379 if (!strcmp(value, "all")) {
1380 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1381 } else if (!strcmp(value, "first")) {
1382 gm->command_bucket_id = OFPG15_BUCKET_FIRST;
1383 } else if (!strcmp(value, "last")) {
1384 gm->command_bucket_id = OFPG15_BUCKET_LAST;
1386 error = str_to_u32(value, &gm->command_bucket_id);
1390 if (gm->command_bucket_id > OFPG15_BUCKET_MAX
1391 && (gm->command_bucket_id != OFPG15_BUCKET_FIRST
1392 && gm->command_bucket_id != OFPG15_BUCKET_LAST
1393 && gm->command_bucket_id != OFPG15_BUCKET_ALL)) {
1394 error = xasprintf("invalid command bucket id %"PRIu32,
1395 gm->command_bucket_id);
1399 if (gm->command_bucket_id == OFPG15_BUCKET_ALL
1400 && !(fields & F_COMMAND_BUCKET_ID_ALL)) {
1401 error = xstrdup("command_bucket_id=all is not permitted");
1404 had_command_bucket_id = true;
1405 } else if (!strcmp(name, "group_id")) {
1406 if(!strcmp(value, "all")) {
1407 gm->group_id = OFPG_ALL;
1409 error = str_to_u32(value, &gm->group_id);
1413 if (gm->group_id != OFPG_ALL && gm->group_id > OFPG_MAX) {
1414 error = xasprintf("invalid group id %"PRIu32,
1419 } else if (!strcmp(name, "type")){
1420 if (!(fields & F_GROUP_TYPE)) {
1421 error = xstrdup("type is not needed");
1424 if (!strcmp(value, "all")) {
1425 gm->type = OFPGT11_ALL;
1426 } else if (!strcmp(value, "select")) {
1427 gm->type = OFPGT11_SELECT;
1428 } else if (!strcmp(value, "indirect")) {
1429 gm->type = OFPGT11_INDIRECT;
1430 } else if (!strcmp(value, "ff") ||
1431 !strcmp(value, "fast_failover")) {
1432 gm->type = OFPGT11_FF;
1434 error = xasprintf("invalid group type %s", value);
1438 } else if (!strcmp(name, "selection_method")) {
1439 if (!(fields & F_GROUP_TYPE)) {
1440 error = xstrdup("selection method is not needed");
1443 if (strlen(value) >= NTR_MAX_SELECTION_METHOD_LEN) {
1444 error = xasprintf("selection method is longer than %u"
1446 NTR_MAX_SELECTION_METHOD_LEN - 1);
1449 memset(gm->props.selection_method, '\0',
1450 NTR_MAX_SELECTION_METHOD_LEN);
1451 strcpy(gm->props.selection_method, value);
1452 *usable_protocols &= OFPUTIL_P_OF15_UP;
1453 } else if (!strcmp(name, "selection_method_param")) {
1454 if (!(fields & F_GROUP_TYPE)) {
1455 error = xstrdup("selection method param is not needed");
1458 error = str_to_u64(value, &gm->props.selection_method_param);
1462 *usable_protocols &= OFPUTIL_P_OF15_UP;
1463 } else if (!strcmp(name, "fields")) {
1464 if (!(fields & F_GROUP_TYPE)) {
1465 error = xstrdup("fields are not needed");
1468 error = parse_select_group_field(value, &gm->props.fields,
1473 *usable_protocols &= OFPUTIL_P_OF15_UP;
1475 error = xasprintf("unknown keyword %s", name);
1479 if (gm->group_id == OFPG_ANY) {
1480 error = xstrdup("must specify a group_id");
1483 if (fields & F_GROUP_TYPE && !had_type) {
1484 error = xstrdup("must specify a type");
1488 if (fields & F_COMMAND_BUCKET_ID) {
1489 if (!(fields & F_COMMAND_BUCKET_ID_ALL || had_command_bucket_id)) {
1490 error = xstrdup("must specify a command bucket id");
1493 } else if (had_command_bucket_id) {
1494 error = xstrdup("command bucket id is not needed");
1498 /* Now parse the buckets, if any. */
1502 bkt_str = strchr(bkt_str + 1, '=');
1504 error = xstrdup("must specify bucket content");
1509 next_bkt_str = strstr(bkt_str, "bucket=");
1511 *next_bkt_str = '\0';
1514 bucket = xzalloc(sizeof(struct ofputil_bucket));
1515 error = parse_bucket_str(bucket, bkt_str, gm->type, usable_protocols);
1520 list_push_back(&gm->buckets, &bucket->list_node);
1522 if (gm->type != OFPGT11_SELECT && bucket->weight) {
1523 error = xstrdup("Only select groups can have bucket weights.");
1527 bkt_str = next_bkt_str;
1529 if (gm->type == OFPGT11_INDIRECT && !list_is_short(&gm->buckets)) {
1530 error = xstrdup("Indirect groups can have at most one bucket.");
1536 ofputil_bucket_list_destroy(&gm->buckets);
1540 char * OVS_WARN_UNUSED_RESULT
1541 parse_ofp_group_mod_str(struct ofputil_group_mod *gm, uint16_t command,
1543 enum ofputil_protocol *usable_protocols)
1545 char *string = xstrdup(str_);
1546 char *error = parse_ofp_group_mod_str__(gm, command, string,
1551 ofputil_bucket_list_destroy(&gm->buckets);
1556 char * OVS_WARN_UNUSED_RESULT
1557 parse_ofp_group_mod_file(const char *file_name, uint16_t command,
1558 struct ofputil_group_mod **gms, size_t *n_gms,
1559 enum ofputil_protocol *usable_protocols)
1561 size_t allocated_gms;
1569 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1570 if (stream == NULL) {
1571 return xasprintf("%s: open failed (%s)",
1572 file_name, ovs_strerror(errno));
1575 allocated_gms = *n_gms;
1578 *usable_protocols = OFPUTIL_P_OF11_UP;
1579 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
1580 enum ofputil_protocol usable;
1583 if (*n_gms >= allocated_gms) {
1584 struct ofputil_group_mod *new_gms;
1587 new_gms = x2nrealloc(*gms, &allocated_gms, sizeof **gms);
1588 for (i = 0; i < *n_gms; i++) {
1589 list_moved(&new_gms[i].buckets, &(*gms)[i].buckets);
1593 error = parse_ofp_group_mod_str(&(*gms)[*n_gms], command, ds_cstr(&s),
1598 for (i = 0; i < *n_gms; i++) {
1599 ofputil_bucket_list_destroy(&(*gms)[i].buckets);
1606 if (stream != stdin) {
1610 return xasprintf("%s:%d: %s", file_name, line_number, error);
1612 *usable_protocols &= usable;
1617 if (stream != stdin) {
1623 char * OVS_WARN_UNUSED_RESULT
1624 parse_ofp_geneve_table_mod_str(struct ofputil_geneve_table_mod *gtm,
1625 uint16_t command, const char *s,
1626 enum ofputil_protocol *usable_protocols)
1628 *usable_protocols = OFPUTIL_P_NXM_OXM_ANY;
1630 gtm->command = command;
1631 list_init(>m->mappings);
1634 struct ofputil_geneve_map *map = xmalloc(sizeof *map);
1641 list_push_back(>m->mappings, &map->list_node);
1643 if (!ovs_scan(s, "{class=%"SCNi16",type=%"SCNi8",len=%"SCNi8"}->tun_metadata%"SCNi16"%n",
1644 &map->option_class, &map->option_type, &map->option_len,
1646 ofputil_uninit_geneve_table(>m->mappings);
1647 return xstrdup("invalid geneve mapping");