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, uint8_t mac[ETH_ADDR_LEN])
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. */
371 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
373 return xasprintf("field %s missing value", name);
376 if (!strcmp(name, "table")) {
377 error = str_to_u8(value, "table", &fm->table_id);
378 if (fm->table_id != 0xff) {
379 *usable_protocols &= OFPUTIL_P_TID;
381 } else if (fields & F_OUT_PORT && !strcmp(name, "out_port")) {
382 if (!ofputil_port_from_string(value, &fm->out_port)) {
383 error = xasprintf("%s is not a valid OpenFlow port",
386 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
387 uint16_t priority = 0;
389 error = str_to_u16(value, name, &priority);
390 fm->priority = priority;
391 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
392 error = str_to_u16(value, name, &fm->idle_timeout);
393 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
394 error = str_to_u16(value, name, &fm->hard_timeout);
395 } else if (fields & F_IMPORTANCE && !strcmp(name, "importance")) {
396 error = str_to_u16(value, name, &fm->importance);
397 } else if (!strcmp(name, "cookie")) {
398 char *mask = strchr(value, '/');
401 /* A mask means we're searching for a cookie. */
402 if (command == OFPFC_ADD) {
403 return xstrdup("flow additions cannot use "
407 error = str_to_be64(value, &fm->cookie);
411 error = str_to_be64(mask + 1, &fm->cookie_mask);
413 /* Matching of the cookie is only supported through NXM or
415 if (fm->cookie_mask != htonll(0)) {
416 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
419 /* No mask means that the cookie is being set. */
420 if (command != OFPFC_ADD && command != OFPFC_MODIFY
421 && command != OFPFC_MODIFY_STRICT) {
422 return xstrdup("cannot set cookie");
424 error = str_to_be64(value, &fm->new_cookie);
425 fm->modify_cookie = true;
427 } else if (mf_from_name(name)) {
428 error = parse_field(mf_from_name(name), value, &fm->match,
430 } else if (!strcmp(name, "duration")
431 || !strcmp(name, "n_packets")
432 || !strcmp(name, "n_bytes")
433 || !strcmp(name, "idle_age")
434 || !strcmp(name, "hard_age")) {
435 /* Ignore these, so that users can feed the output of
436 * "ovs-ofctl dump-flows" back into commands that parse
439 error = xasprintf("unknown keyword %s", name);
447 /* Check for usable protocol interdependencies between match fields. */
448 if (fm->match.flow.dl_type == htons(ETH_TYPE_IPV6)) {
449 const struct flow_wildcards *wc = &fm->match.wc;
450 /* Only NXM and OXM support matching L3 and L4 fields within IPv6.
452 * (IPv6 specific fields as well as arp_sha, arp_tha, nw_frag, and
453 * nw_ttl are covered elsewhere so they don't need to be included in
456 if (wc->masks.nw_proto || wc->masks.nw_tos
457 || wc->masks.tp_src || wc->masks.tp_dst) {
458 *usable_protocols &= OFPUTIL_P_NXM_OXM_ANY;
461 if (!fm->cookie_mask && fm->new_cookie == OVS_BE64_MAX
462 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
463 /* On modifies without a mask, we are supposed to add a flow if
464 * one does not exist. If a cookie wasn't been specified, use a
465 * default of zero. */
466 fm->new_cookie = htonll(0);
468 if (fields & F_ACTIONS) {
469 enum ofputil_protocol action_usable_protocols;
470 struct ofpbuf ofpacts;
473 ofpbuf_init(&ofpacts, 32);
474 error = ofpacts_parse_instructions(act_str, &ofpacts,
475 &action_usable_protocols);
476 *usable_protocols &= action_usable_protocols;
480 err = ofpacts_check(ofpacts.data, ofpacts.size, &fm->match.flow,
481 OFPP_MAX, fm->table_id, 255, usable_protocols);
482 if (!err && !*usable_protocols) {
483 err = OFPERR_OFPBAC_MATCH_INCONSISTENT;
486 error = xasprintf("actions are invalid with specified match "
487 "(%s)", ofperr_to_string(err));
492 ofpbuf_uninit(&ofpacts);
496 fm->ofpacts_len = ofpacts.size;
497 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
506 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
507 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
508 * Returns the set of usable protocols in '*usable_protocols'.
510 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
511 * constant for 'command'. To parse syntax for an OFPST_FLOW or
512 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'.
514 * If 'command' is given as -2, 'str_' may begin with a command name ("add",
515 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
516 * name is treated as "add".
518 * Returns NULL if successful, otherwise a malloc()'d string describing the
519 * error. The caller is responsible for freeing the returned string. */
520 char * OVS_WARN_UNUSED_RESULT
521 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
522 enum ofputil_protocol *usable_protocols)
524 char *string = xstrdup(str_);
527 error = parse_ofp_str__(fm, command, string, usable_protocols);
537 static char * OVS_WARN_UNUSED_RESULT
538 parse_ofp_meter_mod_str__(struct ofputil_meter_mod *mm, char *string,
539 struct ofpbuf *bands, int command,
540 enum ofputil_protocol *usable_protocols)
547 char *save_ptr = NULL;
548 char *band_str = NULL;
551 /* Meters require at least OF 1.3. */
552 *usable_protocols = OFPUTIL_P_OF13_UP;
560 fields = F_METER | F_FLAGS | F_BANDS;
568 fields = F_METER | F_FLAGS | F_BANDS;
575 mm->command = command;
576 mm->meter.meter_id = 0;
578 if (fields & F_BANDS) {
579 band_str = strstr(string, "band");
581 return xstrdup("must specify bands");
585 band_str = strchr(band_str + 1, '=');
587 return xstrdup("must specify bands");
592 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
593 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
595 if (fields & F_FLAGS && !strcmp(name, "kbps")) {
596 mm->meter.flags |= OFPMF13_KBPS;
597 } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
598 mm->meter.flags |= OFPMF13_PKTPS;
599 } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
600 mm->meter.flags |= OFPMF13_BURST;
601 } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
602 mm->meter.flags |= OFPMF13_STATS;
606 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
608 return xasprintf("field %s missing value", name);
611 if (!strcmp(name, "meter")) {
612 if (!strcmp(value, "all")) {
613 mm->meter.meter_id = OFPM13_ALL;
614 } else if (!strcmp(value, "controller")) {
615 mm->meter.meter_id = OFPM13_CONTROLLER;
616 } else if (!strcmp(value, "slowpath")) {
617 mm->meter.meter_id = OFPM13_SLOWPATH;
619 char *error = str_to_u32(value, &mm->meter.meter_id);
623 if (mm->meter.meter_id > OFPM13_MAX
624 || !mm->meter.meter_id) {
625 return xasprintf("invalid value for %s", name);
629 return xasprintf("unknown keyword %s", name);
633 if (fields & F_METER && !mm->meter.meter_id) {
634 return xstrdup("must specify 'meter'");
636 if (fields & F_FLAGS && !mm->meter.flags) {
637 return xstrdup("meter must specify either 'kbps' or 'pktps'");
640 if (fields & F_BANDS) {
641 uint16_t n_bands = 0;
642 struct ofputil_meter_band *band = NULL;
645 for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
646 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
650 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
652 return xasprintf("field %s missing value", name);
655 if (!strcmp(name, "type")) {
656 /* Start a new band */
657 band = ofpbuf_put_zeros(bands, sizeof *band);
660 if (!strcmp(value, "drop")) {
661 band->type = OFPMBT13_DROP;
662 } else if (!strcmp(value, "dscp_remark")) {
663 band->type = OFPMBT13_DSCP_REMARK;
665 return xasprintf("field %s unknown value %s", name, value);
667 } else if (!band || !band->type) {
668 return xstrdup("band must start with the 'type' keyword");
669 } else if (!strcmp(name, "rate")) {
670 char *error = str_to_u32(value, &band->rate);
674 } else if (!strcmp(name, "burst_size")) {
675 char *error = str_to_u32(value, &band->burst_size);
679 } else if (!strcmp(name, "prec_level")) {
680 char *error = str_to_u8(value, name, &band->prec_level);
685 return xasprintf("unknown keyword %s", name);
690 return xstrdup("meter must have bands");
693 mm->meter.n_bands = n_bands;
694 mm->meter.bands = ofpbuf_steal_data(bands);
696 for (i = 0; i < n_bands; ++i) {
697 band = &mm->meter.bands[i];
700 return xstrdup("band must have 'type'");
702 if (band->type == OFPMBT13_DSCP_REMARK) {
703 if (!band->prec_level) {
704 return xstrdup("'dscp_remark' band must have"
708 if (band->prec_level) {
709 return xstrdup("Only 'dscp_remark' band may have"
714 return xstrdup("band must have 'rate'");
716 if (mm->meter.flags & OFPMF13_BURST) {
717 if (!band->burst_size) {
718 return xstrdup("band must have 'burst_size' "
719 "when 'burst' flag is set");
722 if (band->burst_size) {
723 return xstrdup("band may have 'burst_size' only "
724 "when 'burst' flag is set");
729 mm->meter.n_bands = 0;
730 mm->meter.bands = NULL;
736 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
737 * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
739 * Returns NULL if successful, otherwise a malloc()'d string describing the
740 * error. The caller is responsible for freeing the returned string. */
741 char * OVS_WARN_UNUSED_RESULT
742 parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
743 int command, enum ofputil_protocol *usable_protocols)
749 ofpbuf_init(&bands, 64);
750 string = xstrdup(str_);
752 error = parse_ofp_meter_mod_str__(mm, string, &bands, command,
756 ofpbuf_uninit(&bands);
761 static char * OVS_WARN_UNUSED_RESULT
762 parse_flow_monitor_request__(struct ofputil_flow_monitor_request *fmr,
763 const char *str_, char *string,
764 enum ofputil_protocol *usable_protocols)
766 static atomic_count id = ATOMIC_COUNT_INIT(0);
767 char *save_ptr = NULL;
770 fmr->id = atomic_count_inc(&id);
772 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
773 | NXFMF_OWN | NXFMF_ACTIONS);
774 fmr->out_port = OFPP_NONE;
775 fmr->table_id = 0xff;
776 match_init_catchall(&fmr->match);
778 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
779 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
780 const struct protocol *p;
782 if (!strcmp(name, "!initial")) {
783 fmr->flags &= ~NXFMF_INITIAL;
784 } else if (!strcmp(name, "!add")) {
785 fmr->flags &= ~NXFMF_ADD;
786 } else if (!strcmp(name, "!delete")) {
787 fmr->flags &= ~NXFMF_DELETE;
788 } else if (!strcmp(name, "!modify")) {
789 fmr->flags &= ~NXFMF_MODIFY;
790 } else if (!strcmp(name, "!actions")) {
791 fmr->flags &= ~NXFMF_ACTIONS;
792 } else if (!strcmp(name, "!own")) {
793 fmr->flags &= ~NXFMF_OWN;
794 } else if (parse_protocol(name, &p)) {
795 match_set_dl_type(&fmr->match, htons(p->dl_type));
797 match_set_nw_proto(&fmr->match, p->nw_proto);
802 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
804 return xasprintf("%s: field %s missing value", str_, name);
807 if (!strcmp(name, "table")) {
808 char *error = str_to_u8(value, "table", &fmr->table_id);
812 } else if (!strcmp(name, "out_port")) {
813 fmr->out_port = u16_to_ofp(atoi(value));
814 } else if (mf_from_name(name)) {
817 error = parse_field(mf_from_name(name), value, &fmr->match,
823 return xasprintf("%s: unknown keyword %s", str_, name);
830 /* Convert 'str_' (as described in the documentation for the "monitor" command
831 * in the ovs-ofctl man page) into 'fmr'.
833 * Returns NULL if successful, otherwise a malloc()'d string describing the
834 * error. The caller is responsible for freeing the returned string. */
835 char * OVS_WARN_UNUSED_RESULT
836 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
838 enum ofputil_protocol *usable_protocols)
840 char *string = xstrdup(str_);
841 char *error = parse_flow_monitor_request__(fmr, str_, string,
847 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
848 * (one of OFPFC_*) into 'fm'.
850 * If 'command' is given as -2, 'string' may begin with a command name ("add",
851 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
852 * name is treated as "add".
854 * Returns NULL if successful, otherwise a malloc()'d string describing the
855 * error. The caller is responsible for freeing the returned string. */
856 char * OVS_WARN_UNUSED_RESULT
857 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
859 enum ofputil_protocol *usable_protocols)
861 char *error = parse_ofp_str(fm, command, string, usable_protocols);
864 /* Normalize a copy of the match. This ensures that non-normalized
865 * flows get logged but doesn't affect what gets sent to the switch, so
866 * that the switch can do whatever it likes with the flow. */
867 struct match match_copy = fm->match;
868 ofputil_normalize_match(&match_copy);
874 /* Convert 'table_id' and 'setting' (as described for the "mod-table" command
875 * in the ovs-ofctl man page) into 'tm' for sending a table_mod command to a
878 * Stores a bitmap of the OpenFlow versions that are usable for 'tm' into
879 * '*usable_versions'.
881 * Returns NULL if successful, otherwise a malloc()'d string describing the
882 * error. The caller is responsible for freeing the returned string. */
883 char * OVS_WARN_UNUSED_RESULT
884 parse_ofp_table_mod(struct ofputil_table_mod *tm, const char *table_id,
885 const char *setting, uint32_t *usable_versions)
887 *usable_versions = 0;
888 if (!strcasecmp(table_id, "all")) {
889 tm->table_id = OFPTT_ALL;
891 char *error = str_to_u8(table_id, "table_id", &tm->table_id);
897 tm->miss = OFPUTIL_TABLE_MISS_DEFAULT;
898 tm->eviction = OFPUTIL_TABLE_EVICTION_DEFAULT;
899 tm->eviction_flags = UINT32_MAX;
901 /* Only OpenFlow 1.1 and 1.2 can configure table-miss via table_mod.
902 * Only OpenFlow 1.4+ can configure eviction via table_mod.
904 * (OpenFlow 1.4+ can also configure vacancy events via table_mod, but OVS
905 * doesn't support those yet and they're also logically a per-OpenFlow
906 * session setting so it wouldn't make sense to support them here anyway.)
908 if (!strcmp(setting, "controller")) {
909 tm->miss = OFPUTIL_TABLE_MISS_CONTROLLER;
910 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
911 } else if (!strcmp(setting, "continue")) {
912 tm->miss = OFPUTIL_TABLE_MISS_CONTINUE;
913 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
914 } else if (!strcmp(setting, "drop")) {
915 tm->miss = OFPUTIL_TABLE_MISS_DROP;
916 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
917 } else if (!strcmp(setting, "evict")) {
918 tm->eviction = OFPUTIL_TABLE_EVICTION_ON;
919 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
920 } else if (!strcmp(setting, "noevict")) {
921 tm->eviction = OFPUTIL_TABLE_EVICTION_OFF;
922 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
924 return xasprintf("invalid table_mod setting %s", setting);
927 if (tm->table_id == 0xfe
928 && tm->miss == OFPUTIL_TABLE_MISS_CONTINUE) {
929 return xstrdup("last table's flow miss handling can not be continue");
936 /* Opens file 'file_name' and reads each line as a flow_mod of the specified
937 * type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
938 * on the caller's behalf, and the number of flow_mods in '*n_fms'.
940 * If 'command' is given as -2, each line may start with a command name
941 * ("add", "modify", "delete", "modify_strict", or "delete_strict"). A missing
942 * command name is treated as "add".
944 * Returns NULL if successful, otherwise a malloc()'d string describing the
945 * error. The caller is responsible for freeing the returned string. */
946 char * OVS_WARN_UNUSED_RESULT
947 parse_ofp_flow_mod_file(const char *file_name, int command,
948 struct ofputil_flow_mod **fms, size_t *n_fms,
949 enum ofputil_protocol *usable_protocols)
951 size_t allocated_fms;
956 *usable_protocols = OFPUTIL_P_ANY;
961 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
962 if (stream == NULL) {
963 return xasprintf("%s: open failed (%s)",
964 file_name, ovs_strerror(errno));
967 allocated_fms = *n_fms;
970 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
972 enum ofputil_protocol usable;
974 if (*n_fms >= allocated_fms) {
975 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
977 error = parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command,
982 for (i = 0; i < *n_fms; i++) {
983 free(CONST_CAST(struct ofpact *, (*fms)[i].ofpacts));
990 if (stream != stdin) {
994 return xasprintf("%s:%d: %s", file_name, line_number, error);
996 *usable_protocols &= usable; /* Each line can narrow the set. */
1001 if (stream != stdin) {
1007 char * OVS_WARN_UNUSED_RESULT
1008 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1009 bool aggregate, const char *string,
1010 enum ofputil_protocol *usable_protocols)
1012 struct ofputil_flow_mod fm;
1015 error = parse_ofp_str(&fm, -1, string, usable_protocols);
1020 /* Special table ID support not required for stats requests. */
1021 if (*usable_protocols & OFPUTIL_P_OF10_STD_TID) {
1022 *usable_protocols |= OFPUTIL_P_OF10_STD;
1024 if (*usable_protocols & OFPUTIL_P_OF10_NXM_TID) {
1025 *usable_protocols |= OFPUTIL_P_OF10_NXM;
1028 fsr->aggregate = aggregate;
1029 fsr->cookie = fm.cookie;
1030 fsr->cookie_mask = fm.cookie_mask;
1031 fsr->match = fm.match;
1032 fsr->out_port = fm.out_port;
1033 fsr->out_group = fm.out_group;
1034 fsr->table_id = fm.table_id;
1038 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1039 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1040 * mf_field. Fields must be specified in a natural order for satisfying
1041 * prerequisites. If 'mask' is specified, fills the mask field for each of the
1042 * field specified in flow. If the map, 'names_portno' is specfied, converts
1043 * the in_port name into port no while setting the 'flow'.
1045 * Returns NULL on success, otherwise a malloc()'d string that explains the
1048 parse_ofp_exact_flow(struct flow *flow, struct flow *mask, const char *s,
1049 const struct simap *portno_names)
1051 char *pos, *key, *value_s;
1055 memset(flow, 0, sizeof *flow);
1057 memset(mask, 0, sizeof *mask);
1060 pos = copy = xstrdup(s);
1061 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
1062 const struct protocol *p;
1063 if (parse_protocol(key, &p)) {
1064 if (flow->dl_type) {
1065 error = xasprintf("%s: Ethernet type set multiple times", s);
1068 flow->dl_type = htons(p->dl_type);
1070 mask->dl_type = OVS_BE16_MAX;
1074 if (flow->nw_proto) {
1075 error = xasprintf("%s: network protocol set "
1076 "multiple times", s);
1079 flow->nw_proto = p->nw_proto;
1081 mask->nw_proto = UINT8_MAX;
1085 const struct mf_field *mf;
1086 union mf_value value;
1089 mf = mf_from_name(key);
1091 error = xasprintf("%s: unknown field %s", s, key);
1095 if (!mf_are_prereqs_ok(mf, flow)) {
1096 error = xasprintf("%s: prerequisites not met for setting %s",
1101 if (!mf_is_zero(mf, flow)) {
1102 error = xasprintf("%s: field %s set multiple times", s, key);
1106 if (!strcmp(key, "in_port")
1108 && simap_contains(portno_names, value_s)) {
1109 flow->in_port.ofp_port = u16_to_ofp(
1110 simap_get(portno_names, value_s));
1112 mask->in_port.ofp_port = u16_to_ofp(ntohs(OVS_BE16_MAX));
1115 field_error = mf_parse_value(mf, value_s, &value);
1117 error = xasprintf("%s: bad value for %s (%s)",
1118 s, key, field_error);
1123 mf_set_flow_value(mf, &value, flow);
1125 mf_mask_field(mf, mask);
1131 if (!flow->in_port.ofp_port) {
1132 flow->in_port.ofp_port = OFPP_NONE;
1139 memset(flow, 0, sizeof *flow);
1141 memset(mask, 0, sizeof *mask);
1147 static char * OVS_WARN_UNUSED_RESULT
1148 parse_bucket_str(struct ofputil_bucket *bucket, char *str_, uint8_t group_type,
1149 enum ofputil_protocol *usable_protocols)
1151 char *pos, *key, *value;
1152 struct ofpbuf ofpacts;
1156 bucket->weight = group_type == OFPGT11_SELECT ? 1 : 0;
1157 bucket->bucket_id = OFPG15_BUCKET_ALL;
1158 bucket->watch_port = OFPP_ANY;
1159 bucket->watch_group = OFPG11_ANY;
1165 while (ofputil_parse_key_value(&pos, &key, &value)) {
1166 if (!strcasecmp(key, "weight")) {
1167 error = str_to_u16(value, "weight", &bucket->weight);
1168 } else if (!strcasecmp(key, "watch_port")) {
1169 if (!ofputil_port_from_string(value, &bucket->watch_port)
1170 || (ofp_to_u16(bucket->watch_port) >= ofp_to_u16(OFPP_MAX)
1171 && bucket->watch_port != OFPP_ANY)) {
1172 error = xasprintf("%s: invalid watch_port", value);
1174 } else if (!strcasecmp(key, "watch_group")) {
1175 error = str_to_u32(value, &bucket->watch_group);
1176 if (!error && bucket->watch_group > OFPG_MAX) {
1177 error = xasprintf("invalid watch_group id %"PRIu32,
1178 bucket->watch_group);
1180 } else if (!strcasecmp(key, "bucket_id")) {
1181 error = str_to_u32(value, &bucket->bucket_id);
1182 if (!error && bucket->bucket_id > OFPG15_BUCKET_MAX) {
1183 error = xasprintf("invalid bucket_id id %"PRIu32,
1186 *usable_protocols &= OFPUTIL_P_OF15_UP;
1187 } else if (!strcasecmp(key, "action") || !strcasecmp(key, "actions")) {
1188 ds_put_format(&actions, "%s,", value);
1190 ds_put_format(&actions, "%s(%s),", key, value);
1194 ds_destroy(&actions);
1199 if (!actions.length) {
1200 return xstrdup("bucket must specify actions");
1202 ds_chomp(&actions, ',');
1204 ofpbuf_init(&ofpacts, 0);
1205 error = ofpacts_parse_actions(ds_cstr(&actions), &ofpacts,
1207 ds_destroy(&actions);
1209 ofpbuf_uninit(&ofpacts);
1212 bucket->ofpacts = ofpacts.data;
1213 bucket->ofpacts_len = ofpacts.size;
1218 static char * OVS_WARN_UNUSED_RESULT
1219 parse_select_group_field(char *s, struct field_array *fa,
1220 enum ofputil_protocol *usable_protocols)
1222 char *save_ptr = NULL;
1225 for (name = strtok_r(s, "=, \t\r\n", &save_ptr); name;
1226 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1227 const struct mf_field *mf = mf_from_name(name);
1231 const char *value_str;
1232 union mf_value value;
1234 if (bitmap_is_set(fa->used.bm, mf->id)) {
1235 return xasprintf("%s: duplicate field", name);
1238 value_str = strtok_r(NULL, ", \t\r\n", &save_ptr);
1240 error = mf_parse_value(mf, value_str, &value);
1245 /* The mask cannot be all-zeros */
1246 if (is_all_zeros(&value, mf->n_bytes)) {
1247 return xasprintf("%s: values are wildcards here "
1248 "and must not be all-zeros", s);
1251 /* The values parsed are masks for fields used
1252 * by the selection method */
1253 if (!mf_is_mask_valid(mf, &value)) {
1254 return xasprintf("%s: invalid mask for field %s",
1255 value_str, mf->name);
1258 memset(&value, 0xff, mf->n_bytes);
1261 field_array_set(mf->id, &value, fa);
1263 if (is_all_ones(&value, mf->n_bytes)) {
1264 *usable_protocols &= mf->usable_protocols_exact;
1265 } else if (mf->usable_protocols_bitwise == mf->usable_protocols_cidr
1266 || ip_is_cidr(value.be32)) {
1267 *usable_protocols &= mf->usable_protocols_cidr;
1269 *usable_protocols &= mf->usable_protocols_bitwise;
1272 return xasprintf("%s: unknown field %s", s, name);
1279 static char * OVS_WARN_UNUSED_RESULT
1280 parse_ofp_group_mod_str__(struct ofputil_group_mod *gm, uint16_t command,
1282 enum ofputil_protocol *usable_protocols)
1285 F_GROUP_TYPE = 1 << 0,
1287 F_COMMAND_BUCKET_ID = 1 << 2,
1288 F_COMMAND_BUCKET_ID_ALL = 1 << 3,
1290 char *save_ptr = NULL;
1291 bool had_type = false;
1292 bool had_command_bucket_id = false;
1294 struct ofputil_bucket *bucket;
1297 *usable_protocols = OFPUTIL_P_OF11_UP;
1301 fields = F_GROUP_TYPE | F_BUCKETS;
1304 case OFPGC11_DELETE:
1308 case OFPGC11_MODIFY:
1309 fields = F_GROUP_TYPE | F_BUCKETS;
1312 case OFPGC15_INSERT_BUCKET:
1313 fields = F_BUCKETS | F_COMMAND_BUCKET_ID;
1314 *usable_protocols &= OFPUTIL_P_OF15_UP;
1317 case OFPGC15_REMOVE_BUCKET:
1318 fields = F_COMMAND_BUCKET_ID | F_COMMAND_BUCKET_ID_ALL;
1319 *usable_protocols &= OFPUTIL_P_OF15_UP;
1326 memset(gm, 0, sizeof *gm);
1327 gm->command = command;
1328 gm->group_id = OFPG_ANY;
1329 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1330 list_init(&gm->buckets);
1331 if (command == OFPGC11_DELETE && string[0] == '\0') {
1332 gm->group_id = OFPG_ALL;
1336 *usable_protocols = OFPUTIL_P_OF11_UP;
1338 /* Strip the buckets off the end of 'string', if there are any, saving a
1339 * pointer for later. We want to parse the buckets last because the bucket
1340 * type influences bucket defaults. */
1341 char *bkt_str = strstr(string, "bucket=");
1343 if (!(fields & F_BUCKETS)) {
1344 error = xstrdup("bucket is not needed");
1350 /* Parse everything before the buckets. */
1351 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1352 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1355 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1357 error = xasprintf("field %s missing value", name);
1361 if (!strcmp(name, "command_bucket_id")) {
1362 if (!(fields & F_COMMAND_BUCKET_ID)) {
1363 error = xstrdup("command bucket id is not needed");
1366 if (!strcmp(value, "all")) {
1367 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1368 } else if (!strcmp(value, "first")) {
1369 gm->command_bucket_id = OFPG15_BUCKET_FIRST;
1370 } else if (!strcmp(value, "last")) {
1371 gm->command_bucket_id = OFPG15_BUCKET_LAST;
1373 error = str_to_u32(value, &gm->command_bucket_id);
1377 if (gm->command_bucket_id > OFPG15_BUCKET_MAX
1378 && (gm->command_bucket_id != OFPG15_BUCKET_FIRST
1379 && gm->command_bucket_id != OFPG15_BUCKET_LAST
1380 && gm->command_bucket_id != OFPG15_BUCKET_ALL)) {
1381 error = xasprintf("invalid command bucket id %"PRIu32,
1382 gm->command_bucket_id);
1386 if (gm->command_bucket_id == OFPG15_BUCKET_ALL
1387 && !(fields & F_COMMAND_BUCKET_ID_ALL)) {
1388 error = xstrdup("command_bucket_id=all is not permitted");
1391 had_command_bucket_id = true;
1392 } else if (!strcmp(name, "group_id")) {
1393 if(!strcmp(value, "all")) {
1394 gm->group_id = OFPG_ALL;
1396 error = str_to_u32(value, &gm->group_id);
1400 if (gm->group_id != OFPG_ALL && gm->group_id > OFPG_MAX) {
1401 error = xasprintf("invalid group id %"PRIu32,
1406 } else if (!strcmp(name, "type")){
1407 if (!(fields & F_GROUP_TYPE)) {
1408 error = xstrdup("type is not needed");
1411 if (!strcmp(value, "all")) {
1412 gm->type = OFPGT11_ALL;
1413 } else if (!strcmp(value, "select")) {
1414 gm->type = OFPGT11_SELECT;
1415 } else if (!strcmp(value, "indirect")) {
1416 gm->type = OFPGT11_INDIRECT;
1417 } else if (!strcmp(value, "ff") ||
1418 !strcmp(value, "fast_failover")) {
1419 gm->type = OFPGT11_FF;
1421 error = xasprintf("invalid group type %s", value);
1425 } else if (!strcmp(name, "selection_method")) {
1426 if (!(fields & F_GROUP_TYPE)) {
1427 error = xstrdup("selection method is not needed");
1430 if (strlen(value) >= NTR_MAX_SELECTION_METHOD_LEN) {
1431 error = xasprintf("selection method is longer than %u"
1433 NTR_MAX_SELECTION_METHOD_LEN - 1);
1436 memset(gm->props.selection_method, '\0',
1437 NTR_MAX_SELECTION_METHOD_LEN);
1438 strcpy(gm->props.selection_method, value);
1439 *usable_protocols &= OFPUTIL_P_OF15_UP;
1440 } else if (!strcmp(name, "selection_method_param")) {
1441 if (!(fields & F_GROUP_TYPE)) {
1442 error = xstrdup("selection method param is not needed");
1445 error = str_to_u64(value, &gm->props.selection_method_param);
1449 *usable_protocols &= OFPUTIL_P_OF15_UP;
1450 } else if (!strcmp(name, "fields")) {
1451 if (!(fields & F_GROUP_TYPE)) {
1452 error = xstrdup("fields are not needed");
1455 error = parse_select_group_field(value, &gm->props.fields,
1460 *usable_protocols &= OFPUTIL_P_OF15_UP;
1462 error = xasprintf("unknown keyword %s", name);
1466 if (gm->group_id == OFPG_ANY) {
1467 error = xstrdup("must specify a group_id");
1470 if (fields & F_GROUP_TYPE && !had_type) {
1471 error = xstrdup("must specify a type");
1475 if (fields & F_COMMAND_BUCKET_ID) {
1476 if (!(fields & F_COMMAND_BUCKET_ID_ALL || had_command_bucket_id)) {
1477 error = xstrdup("must specify a command bucket id");
1480 } else if (had_command_bucket_id) {
1481 error = xstrdup("command bucket id is not needed");
1485 /* Now parse the buckets, if any. */
1489 bkt_str = strchr(bkt_str + 1, '=');
1491 error = xstrdup("must specify bucket content");
1496 next_bkt_str = strstr(bkt_str, "bucket=");
1498 *next_bkt_str = '\0';
1501 bucket = xzalloc(sizeof(struct ofputil_bucket));
1502 error = parse_bucket_str(bucket, bkt_str, gm->type, usable_protocols);
1507 list_push_back(&gm->buckets, &bucket->list_node);
1509 if (gm->type != OFPGT11_SELECT && bucket->weight) {
1510 error = xstrdup("Only select groups can have bucket weights.");
1514 bkt_str = next_bkt_str;
1516 if (gm->type == OFPGT11_INDIRECT && !list_is_short(&gm->buckets)) {
1517 error = xstrdup("Indirect groups can have at most one bucket.");
1523 ofputil_bucket_list_destroy(&gm->buckets);
1527 char * OVS_WARN_UNUSED_RESULT
1528 parse_ofp_group_mod_str(struct ofputil_group_mod *gm, uint16_t command,
1530 enum ofputil_protocol *usable_protocols)
1532 char *string = xstrdup(str_);
1533 char *error = parse_ofp_group_mod_str__(gm, command, string,
1538 ofputil_bucket_list_destroy(&gm->buckets);
1543 char * OVS_WARN_UNUSED_RESULT
1544 parse_ofp_group_mod_file(const char *file_name, uint16_t command,
1545 struct ofputil_group_mod **gms, size_t *n_gms,
1546 enum ofputil_protocol *usable_protocols)
1548 size_t allocated_gms;
1556 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1557 if (stream == NULL) {
1558 return xasprintf("%s: open failed (%s)",
1559 file_name, ovs_strerror(errno));
1562 allocated_gms = *n_gms;
1565 *usable_protocols = OFPUTIL_P_OF11_UP;
1566 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
1567 enum ofputil_protocol usable;
1570 if (*n_gms >= allocated_gms) {
1571 struct ofputil_group_mod *new_gms;
1574 new_gms = x2nrealloc(*gms, &allocated_gms, sizeof **gms);
1575 for (i = 0; i < *n_gms; i++) {
1576 list_moved(&new_gms[i].buckets, &(*gms)[i].buckets);
1580 error = parse_ofp_group_mod_str(&(*gms)[*n_gms], command, ds_cstr(&s),
1585 for (i = 0; i < *n_gms; i++) {
1586 ofputil_bucket_list_destroy(&(*gms)[i].buckets);
1593 if (stream != stdin) {
1597 return xasprintf("%s:%d: %s", file_name, line_number, error);
1599 *usable_protocols &= usable;
1604 if (stream != stdin) {
1610 char * OVS_WARN_UNUSED_RESULT
1611 parse_ofp_geneve_table_mod_str(struct ofputil_geneve_table_mod *gtm,
1612 uint16_t command, const char *s,
1613 enum ofputil_protocol *usable_protocols)
1615 *usable_protocols = OFPUTIL_P_NXM_OXM_ANY;
1617 gtm->command = command;
1618 list_init(>m->mappings);
1621 struct ofputil_geneve_map *map = xmalloc(sizeof *map);
1628 list_push_back(>m->mappings, &map->list_node);
1630 if (!ovs_scan(s, "{class=%"SCNi16",type=%"SCNi8",len=%"SCNi8"}->tun_metadata%"SCNi16"%n",
1631 &map->option_class, &map->option_type, &map->option_len,
1633 ofputil_uninit_geneve_table(>m->mappings);
1634 return xstrdup("invalid geneve mapping");