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 *act_str = NULL;
260 *usable_protocols = OFPUTIL_P_ANY;
265 string += strspn(string, " \t\r\n"); /* Skip white space. */
266 len = strcspn(string, ", \t\r\n"); /* Get length of the first token. */
268 if (!strncmp(string, "add", len)) {
270 } else if (!strncmp(string, "delete", len)) {
271 command = OFPFC_DELETE;
272 } else if (!strncmp(string, "delete_strict", len)) {
273 command = OFPFC_DELETE_STRICT;
274 } else if (!strncmp(string, "modify", len)) {
275 command = OFPFC_MODIFY;
276 } else if (!strncmp(string, "modify_strict", len)) {
277 command = OFPFC_MODIFY_STRICT;
291 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS | F_IMPORTANCE;
298 case OFPFC_DELETE_STRICT:
299 fields = F_OUT_PORT | F_PRIORITY;
303 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
306 case OFPFC_MODIFY_STRICT:
307 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
314 match_init_catchall(&fm->match);
315 fm->priority = OFP_DEFAULT_PRIORITY;
316 fm->cookie = htonll(0);
317 fm->cookie_mask = htonll(0);
318 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
319 /* For modify, by default, don't update the cookie. */
320 fm->new_cookie = OVS_BE64_MAX;
322 fm->new_cookie = htonll(0);
324 fm->modify_cookie = false;
326 fm->command = command;
327 fm->idle_timeout = OFP_FLOW_PERMANENT;
328 fm->hard_timeout = OFP_FLOW_PERMANENT;
329 fm->buffer_id = UINT32_MAX;
330 fm->out_port = OFPP_ANY;
333 fm->out_group = OFPG11_ANY;
334 fm->delete_reason = OFPRR_DELETE;
335 if (fields & F_ACTIONS) {
336 act_str = extract_actions(string);
338 return xstrdup("must specify an action");
342 while (ofputil_parse_key_value(&string, &name, &value)) {
343 const struct protocol *p;
346 if (parse_protocol(name, &p)) {
347 match_set_dl_type(&fm->match, htons(p->dl_type));
349 match_set_nw_proto(&fm->match, p->nw_proto);
351 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
352 fm->flags |= OFPUTIL_FF_SEND_FLOW_REM;
353 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
354 fm->flags |= OFPUTIL_FF_CHECK_OVERLAP;
355 } else if (fields & F_FLAGS && !strcmp(name, "reset_counts")) {
356 fm->flags |= OFPUTIL_FF_RESET_COUNTS;
357 *usable_protocols &= OFPUTIL_P_OF12_UP;
358 } else if (fields & F_FLAGS && !strcmp(name, "no_packet_counts")) {
359 fm->flags |= OFPUTIL_FF_NO_PKT_COUNTS;
360 *usable_protocols &= OFPUTIL_P_OF13_UP;
361 } else if (fields & F_FLAGS && !strcmp(name, "no_byte_counts")) {
362 fm->flags |= OFPUTIL_FF_NO_BYT_COUNTS;
363 *usable_protocols &= OFPUTIL_P_OF13_UP;
364 } else if (!strcmp(name, "no_readonly_table")
365 || !strcmp(name, "allow_hidden_fields")) {
366 /* ignore these fields. */
367 } else if (mf_from_name(name)) {
369 /* If there's no value, we're just trying to match on the
370 * existence of the field, so use a no-op value. */
373 error = parse_field(mf_from_name(name), value, &fm->match,
377 return xasprintf("field %s missing value", name);
380 if (!strcmp(name, "table")) {
381 error = str_to_u8(value, "table", &fm->table_id);
382 if (fm->table_id != 0xff) {
383 *usable_protocols &= OFPUTIL_P_TID;
385 } else if (fields & F_OUT_PORT && !strcmp(name, "out_port")) {
386 if (!ofputil_port_from_string(value, &fm->out_port)) {
387 error = xasprintf("%s is not a valid OpenFlow port",
390 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
391 uint16_t priority = 0;
393 error = str_to_u16(value, name, &priority);
394 fm->priority = priority;
395 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
396 error = str_to_u16(value, name, &fm->idle_timeout);
397 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
398 error = str_to_u16(value, name, &fm->hard_timeout);
399 } else if (fields & F_IMPORTANCE && !strcmp(name, "importance")) {
400 error = str_to_u16(value, name, &fm->importance);
401 } else if (!strcmp(name, "cookie")) {
402 char *mask = strchr(value, '/');
405 /* A mask means we're searching for a cookie. */
406 if (command == OFPFC_ADD) {
407 return xstrdup("flow additions cannot use "
411 error = str_to_be64(value, &fm->cookie);
415 error = str_to_be64(mask + 1, &fm->cookie_mask);
417 /* Matching of the cookie is only supported through NXM or
419 if (fm->cookie_mask != htonll(0)) {
420 *usable_protocols &= OFPUTIL_P_NXM_OF11_UP;
423 /* No mask means that the cookie is being set. */
424 if (command != OFPFC_ADD && command != OFPFC_MODIFY
425 && command != OFPFC_MODIFY_STRICT) {
426 return xstrdup("cannot set cookie");
428 error = str_to_be64(value, &fm->new_cookie);
429 fm->modify_cookie = true;
431 } else if (!strcmp(name, "duration")
432 || !strcmp(name, "n_packets")
433 || !strcmp(name, "n_bytes")
434 || !strcmp(name, "idle_age")
435 || !strcmp(name, "hard_age")) {
436 /* Ignore these, so that users can feed the output of
437 * "ovs-ofctl dump-flows" back into commands that parse
440 error = xasprintf("unknown keyword %s", name);
448 /* Check for usable protocol interdependencies between match fields. */
449 if (fm->match.flow.dl_type == htons(ETH_TYPE_IPV6)) {
450 const struct flow_wildcards *wc = &fm->match.wc;
451 /* Only NXM and OXM support matching L3 and L4 fields within IPv6.
453 * (IPv6 specific fields as well as arp_sha, arp_tha, nw_frag, and
454 * nw_ttl are covered elsewhere so they don't need to be included in
457 if (wc->masks.nw_proto || wc->masks.nw_tos
458 || wc->masks.tp_src || wc->masks.tp_dst) {
459 *usable_protocols &= OFPUTIL_P_NXM_OXM_ANY;
462 if (!fm->cookie_mask && fm->new_cookie == OVS_BE64_MAX
463 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
464 /* On modifies without a mask, we are supposed to add a flow if
465 * one does not exist. If a cookie wasn't been specified, use a
466 * default of zero. */
467 fm->new_cookie = htonll(0);
469 if (fields & F_ACTIONS) {
470 enum ofputil_protocol action_usable_protocols;
471 struct ofpbuf ofpacts;
474 ofpbuf_init(&ofpacts, 32);
475 error = ofpacts_parse_instructions(act_str, &ofpacts,
476 &action_usable_protocols);
477 *usable_protocols &= action_usable_protocols;
481 err = ofpacts_check(ofpacts.data, ofpacts.size, &fm->match.flow,
482 OFPP_MAX, fm->table_id, 255, usable_protocols);
483 if (!err && !*usable_protocols) {
484 err = OFPERR_OFPBAC_MATCH_INCONSISTENT;
487 error = xasprintf("actions are invalid with specified match "
488 "(%s)", ofperr_to_string(err));
493 ofpbuf_uninit(&ofpacts);
497 fm->ofpacts_len = ofpacts.size;
498 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
507 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
508 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
509 * Returns the set of usable protocols in '*usable_protocols'.
511 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
512 * constant for 'command'. To parse syntax for an OFPST_FLOW or
513 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'.
515 * If 'command' is given as -2, 'str_' may begin with a command name ("add",
516 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
517 * name is treated as "add".
519 * Returns NULL if successful, otherwise a malloc()'d string describing the
520 * error. The caller is responsible for freeing the returned string. */
521 char * OVS_WARN_UNUSED_RESULT
522 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
523 enum ofputil_protocol *usable_protocols)
525 char *string = xstrdup(str_);
528 error = parse_ofp_str__(fm, command, string, usable_protocols);
538 static char * OVS_WARN_UNUSED_RESULT
539 parse_ofp_meter_mod_str__(struct ofputil_meter_mod *mm, char *string,
540 struct ofpbuf *bands, int command,
541 enum ofputil_protocol *usable_protocols)
548 char *save_ptr = NULL;
549 char *band_str = NULL;
552 /* Meters require at least OF 1.3. */
553 *usable_protocols = OFPUTIL_P_OF13_UP;
561 fields = F_METER | F_FLAGS | F_BANDS;
569 fields = F_METER | F_FLAGS | F_BANDS;
576 mm->command = command;
577 mm->meter.meter_id = 0;
579 if (fields & F_BANDS) {
580 band_str = strstr(string, "band");
582 return xstrdup("must specify bands");
586 band_str = strchr(band_str + 1, '=');
588 return xstrdup("must specify bands");
593 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
594 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
596 if (fields & F_FLAGS && !strcmp(name, "kbps")) {
597 mm->meter.flags |= OFPMF13_KBPS;
598 } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
599 mm->meter.flags |= OFPMF13_PKTPS;
600 } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
601 mm->meter.flags |= OFPMF13_BURST;
602 } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
603 mm->meter.flags |= OFPMF13_STATS;
607 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
609 return xasprintf("field %s missing value", name);
612 if (!strcmp(name, "meter")) {
613 if (!strcmp(value, "all")) {
614 mm->meter.meter_id = OFPM13_ALL;
615 } else if (!strcmp(value, "controller")) {
616 mm->meter.meter_id = OFPM13_CONTROLLER;
617 } else if (!strcmp(value, "slowpath")) {
618 mm->meter.meter_id = OFPM13_SLOWPATH;
620 char *error = str_to_u32(value, &mm->meter.meter_id);
624 if (mm->meter.meter_id > OFPM13_MAX
625 || !mm->meter.meter_id) {
626 return xasprintf("invalid value for %s", name);
630 return xasprintf("unknown keyword %s", name);
634 if (fields & F_METER && !mm->meter.meter_id) {
635 return xstrdup("must specify 'meter'");
637 if (fields & F_FLAGS && !mm->meter.flags) {
638 return xstrdup("meter must specify either 'kbps' or 'pktps'");
641 if (fields & F_BANDS) {
642 uint16_t n_bands = 0;
643 struct ofputil_meter_band *band = NULL;
646 for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
647 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
651 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
653 return xasprintf("field %s missing value", name);
656 if (!strcmp(name, "type")) {
657 /* Start a new band */
658 band = ofpbuf_put_zeros(bands, sizeof *band);
661 if (!strcmp(value, "drop")) {
662 band->type = OFPMBT13_DROP;
663 } else if (!strcmp(value, "dscp_remark")) {
664 band->type = OFPMBT13_DSCP_REMARK;
666 return xasprintf("field %s unknown value %s", name, value);
668 } else if (!band || !band->type) {
669 return xstrdup("band must start with the 'type' keyword");
670 } else if (!strcmp(name, "rate")) {
671 char *error = str_to_u32(value, &band->rate);
675 } else if (!strcmp(name, "burst_size")) {
676 char *error = str_to_u32(value, &band->burst_size);
680 } else if (!strcmp(name, "prec_level")) {
681 char *error = str_to_u8(value, name, &band->prec_level);
686 return xasprintf("unknown keyword %s", name);
691 return xstrdup("meter must have bands");
694 mm->meter.n_bands = n_bands;
695 mm->meter.bands = ofpbuf_steal_data(bands);
697 for (i = 0; i < n_bands; ++i) {
698 band = &mm->meter.bands[i];
701 return xstrdup("band must have 'type'");
703 if (band->type == OFPMBT13_DSCP_REMARK) {
704 if (!band->prec_level) {
705 return xstrdup("'dscp_remark' band must have"
709 if (band->prec_level) {
710 return xstrdup("Only 'dscp_remark' band may have"
715 return xstrdup("band must have 'rate'");
717 if (mm->meter.flags & OFPMF13_BURST) {
718 if (!band->burst_size) {
719 return xstrdup("band must have 'burst_size' "
720 "when 'burst' flag is set");
723 if (band->burst_size) {
724 return xstrdup("band may have 'burst_size' only "
725 "when 'burst' flag is set");
730 mm->meter.n_bands = 0;
731 mm->meter.bands = NULL;
737 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
738 * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
740 * Returns NULL if successful, otherwise a malloc()'d string describing the
741 * error. The caller is responsible for freeing the returned string. */
742 char * OVS_WARN_UNUSED_RESULT
743 parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
744 int command, enum ofputil_protocol *usable_protocols)
750 ofpbuf_init(&bands, 64);
751 string = xstrdup(str_);
753 error = parse_ofp_meter_mod_str__(mm, string, &bands, command,
757 ofpbuf_uninit(&bands);
762 static char * OVS_WARN_UNUSED_RESULT
763 parse_flow_monitor_request__(struct ofputil_flow_monitor_request *fmr,
764 const char *str_, char *string,
765 enum ofputil_protocol *usable_protocols)
767 static atomic_count id = ATOMIC_COUNT_INIT(0);
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 while (ofputil_parse_key_value(&string, &name, &value)) {
779 const struct protocol *p;
781 if (!strcmp(name, "!initial")) {
782 fmr->flags &= ~NXFMF_INITIAL;
783 } else if (!strcmp(name, "!add")) {
784 fmr->flags &= ~NXFMF_ADD;
785 } else if (!strcmp(name, "!delete")) {
786 fmr->flags &= ~NXFMF_DELETE;
787 } else if (!strcmp(name, "!modify")) {
788 fmr->flags &= ~NXFMF_MODIFY;
789 } else if (!strcmp(name, "!actions")) {
790 fmr->flags &= ~NXFMF_ACTIONS;
791 } else if (!strcmp(name, "!own")) {
792 fmr->flags &= ~NXFMF_OWN;
793 } else if (parse_protocol(name, &p)) {
794 match_set_dl_type(&fmr->match, htons(p->dl_type));
796 match_set_nw_proto(&fmr->match, p->nw_proto);
800 return xasprintf("%s: field %s missing value", str_, name);
803 if (!strcmp(name, "table")) {
804 char *error = str_to_u8(value, "table", &fmr->table_id);
808 } else if (!strcmp(name, "out_port")) {
809 fmr->out_port = u16_to_ofp(atoi(value));
810 } else if (mf_from_name(name)) {
813 error = parse_field(mf_from_name(name), value, &fmr->match,
819 return xasprintf("%s: unknown keyword %s", str_, name);
826 /* Convert 'str_' (as described in the documentation for the "monitor" command
827 * in the ovs-ofctl man page) into 'fmr'.
829 * Returns NULL if successful, otherwise a malloc()'d string describing the
830 * error. The caller is responsible for freeing the returned string. */
831 char * OVS_WARN_UNUSED_RESULT
832 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
834 enum ofputil_protocol *usable_protocols)
836 char *string = xstrdup(str_);
837 char *error = parse_flow_monitor_request__(fmr, str_, string,
843 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
844 * (one of OFPFC_*) into 'fm'.
846 * If 'command' is given as -2, 'string' may begin with a command name ("add",
847 * "modify", "delete", "modify_strict", or "delete_strict"). A missing command
848 * name is treated as "add".
850 * Returns NULL if successful, otherwise a malloc()'d string describing the
851 * error. The caller is responsible for freeing the returned string. */
852 char * OVS_WARN_UNUSED_RESULT
853 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
855 enum ofputil_protocol *usable_protocols)
857 char *error = parse_ofp_str(fm, command, string, usable_protocols);
860 /* Normalize a copy of the match. This ensures that non-normalized
861 * flows get logged but doesn't affect what gets sent to the switch, so
862 * that the switch can do whatever it likes with the flow. */
863 struct match match_copy = fm->match;
864 ofputil_normalize_match(&match_copy);
870 /* Convert 'table_id' and 'setting' (as described for the "mod-table" command
871 * in the ovs-ofctl man page) into 'tm' for sending a table_mod command to a
874 * Stores a bitmap of the OpenFlow versions that are usable for 'tm' into
875 * '*usable_versions'.
877 * Returns NULL if successful, otherwise a malloc()'d string describing the
878 * error. The caller is responsible for freeing the returned string. */
879 char * OVS_WARN_UNUSED_RESULT
880 parse_ofp_table_mod(struct ofputil_table_mod *tm, const char *table_id,
881 const char *setting, uint32_t *usable_versions)
883 *usable_versions = 0;
884 if (!strcasecmp(table_id, "all")) {
885 tm->table_id = OFPTT_ALL;
887 char *error = str_to_u8(table_id, "table_id", &tm->table_id);
893 tm->miss = OFPUTIL_TABLE_MISS_DEFAULT;
894 tm->eviction = OFPUTIL_TABLE_EVICTION_DEFAULT;
895 tm->eviction_flags = UINT32_MAX;
897 /* Only OpenFlow 1.1 and 1.2 can configure table-miss via table_mod.
898 * Only OpenFlow 1.4+ can configure eviction via table_mod.
900 * (OpenFlow 1.4+ can also configure vacancy events via table_mod, but OVS
901 * doesn't support those yet and they're also logically a per-OpenFlow
902 * session setting so it wouldn't make sense to support them here anyway.)
904 if (!strcmp(setting, "controller")) {
905 tm->miss = OFPUTIL_TABLE_MISS_CONTROLLER;
906 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
907 } else if (!strcmp(setting, "continue")) {
908 tm->miss = OFPUTIL_TABLE_MISS_CONTINUE;
909 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
910 } else if (!strcmp(setting, "drop")) {
911 tm->miss = OFPUTIL_TABLE_MISS_DROP;
912 *usable_versions = (1u << OFP11_VERSION) | (1u << OFP12_VERSION);
913 } else if (!strcmp(setting, "evict")) {
914 tm->eviction = OFPUTIL_TABLE_EVICTION_ON;
915 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
916 } else if (!strcmp(setting, "noevict")) {
917 tm->eviction = OFPUTIL_TABLE_EVICTION_OFF;
918 *usable_versions = (1 << OFP14_VERSION) | (1u << OFP15_VERSION);
920 return xasprintf("invalid table_mod setting %s", setting);
923 if (tm->table_id == 0xfe
924 && tm->miss == OFPUTIL_TABLE_MISS_CONTINUE) {
925 return xstrdup("last table's flow miss handling can not be continue");
932 /* Opens file 'file_name' and reads each line as a flow_mod of the specified
933 * type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
934 * on the caller's behalf, and the number of flow_mods in '*n_fms'.
936 * If 'command' is given as -2, each line may start with a command name
937 * ("add", "modify", "delete", "modify_strict", or "delete_strict"). A missing
938 * command name is treated as "add".
940 * Returns NULL if successful, otherwise a malloc()'d string describing the
941 * error. The caller is responsible for freeing the returned string. */
942 char * OVS_WARN_UNUSED_RESULT
943 parse_ofp_flow_mod_file(const char *file_name, int command,
944 struct ofputil_flow_mod **fms, size_t *n_fms,
945 enum ofputil_protocol *usable_protocols)
947 size_t allocated_fms;
952 *usable_protocols = OFPUTIL_P_ANY;
957 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
958 if (stream == NULL) {
959 return xasprintf("%s: open failed (%s)",
960 file_name, ovs_strerror(errno));
963 allocated_fms = *n_fms;
966 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
968 enum ofputil_protocol usable;
970 if (*n_fms >= allocated_fms) {
971 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
973 error = parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command,
978 for (i = 0; i < *n_fms; i++) {
979 free(CONST_CAST(struct ofpact *, (*fms)[i].ofpacts));
986 if (stream != stdin) {
990 return xasprintf("%s:%d: %s", file_name, line_number, error);
992 *usable_protocols &= usable; /* Each line can narrow the set. */
997 if (stream != stdin) {
1003 char * OVS_WARN_UNUSED_RESULT
1004 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1005 bool aggregate, const char *string,
1006 enum ofputil_protocol *usable_protocols)
1008 struct ofputil_flow_mod fm;
1011 error = parse_ofp_str(&fm, -1, string, usable_protocols);
1016 /* Special table ID support not required for stats requests. */
1017 if (*usable_protocols & OFPUTIL_P_OF10_STD_TID) {
1018 *usable_protocols |= OFPUTIL_P_OF10_STD;
1020 if (*usable_protocols & OFPUTIL_P_OF10_NXM_TID) {
1021 *usable_protocols |= OFPUTIL_P_OF10_NXM;
1024 fsr->aggregate = aggregate;
1025 fsr->cookie = fm.cookie;
1026 fsr->cookie_mask = fm.cookie_mask;
1027 fsr->match = fm.match;
1028 fsr->out_port = fm.out_port;
1029 fsr->out_group = fm.out_group;
1030 fsr->table_id = fm.table_id;
1034 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1035 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1036 * mf_field. Fields must be specified in a natural order for satisfying
1037 * prerequisites. If 'mask' is specified, fills the mask field for each of the
1038 * field specified in flow. If the map, 'names_portno' is specfied, converts
1039 * the in_port name into port no while setting the 'flow'.
1041 * Returns NULL on success, otherwise a malloc()'d string that explains the
1044 parse_ofp_exact_flow(struct flow *flow, struct flow *mask, const char *s,
1045 const struct simap *portno_names)
1047 char *pos, *key, *value_s;
1051 memset(flow, 0, sizeof *flow);
1053 memset(mask, 0, sizeof *mask);
1056 pos = copy = xstrdup(s);
1057 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
1058 const struct protocol *p;
1059 if (parse_protocol(key, &p)) {
1060 if (flow->dl_type) {
1061 error = xasprintf("%s: Ethernet type set multiple times", s);
1064 flow->dl_type = htons(p->dl_type);
1066 mask->dl_type = OVS_BE16_MAX;
1070 if (flow->nw_proto) {
1071 error = xasprintf("%s: network protocol set "
1072 "multiple times", s);
1075 flow->nw_proto = p->nw_proto;
1077 mask->nw_proto = UINT8_MAX;
1081 const struct mf_field *mf;
1082 union mf_value value;
1085 mf = mf_from_name(key);
1087 error = xasprintf("%s: unknown field %s", s, key);
1091 if (!mf_are_prereqs_ok(mf, flow)) {
1092 error = xasprintf("%s: prerequisites not met for setting %s",
1097 if (mf_is_set(mf, flow)) {
1098 error = xasprintf("%s: field %s set multiple times", s, key);
1102 if (!strcmp(key, "in_port")
1104 && simap_contains(portno_names, value_s)) {
1105 flow->in_port.ofp_port = u16_to_ofp(
1106 simap_get(portno_names, value_s));
1108 mask->in_port.ofp_port = u16_to_ofp(ntohs(OVS_BE16_MAX));
1111 field_error = mf_parse_value(mf, value_s, &value);
1113 error = xasprintf("%s: bad value for %s (%s)",
1114 s, key, field_error);
1119 mf_set_flow_value(mf, &value, flow);
1121 mf_mask_field(mf, mask);
1127 if (!flow->in_port.ofp_port) {
1128 flow->in_port.ofp_port = OFPP_NONE;
1135 memset(flow, 0, sizeof *flow);
1137 memset(mask, 0, sizeof *mask);
1143 static char * OVS_WARN_UNUSED_RESULT
1144 parse_bucket_str(struct ofputil_bucket *bucket, char *str_, uint8_t group_type,
1145 enum ofputil_protocol *usable_protocols)
1147 char *pos, *key, *value;
1148 struct ofpbuf ofpacts;
1152 bucket->weight = group_type == OFPGT11_SELECT ? 1 : 0;
1153 bucket->bucket_id = OFPG15_BUCKET_ALL;
1154 bucket->watch_port = OFPP_ANY;
1155 bucket->watch_group = OFPG11_ANY;
1161 while (ofputil_parse_key_value(&pos, &key, &value)) {
1162 if (!strcasecmp(key, "weight")) {
1163 error = str_to_u16(value, "weight", &bucket->weight);
1164 } else if (!strcasecmp(key, "watch_port")) {
1165 if (!ofputil_port_from_string(value, &bucket->watch_port)
1166 || (ofp_to_u16(bucket->watch_port) >= ofp_to_u16(OFPP_MAX)
1167 && bucket->watch_port != OFPP_ANY)) {
1168 error = xasprintf("%s: invalid watch_port", value);
1170 } else if (!strcasecmp(key, "watch_group")) {
1171 error = str_to_u32(value, &bucket->watch_group);
1172 if (!error && bucket->watch_group > OFPG_MAX) {
1173 error = xasprintf("invalid watch_group id %"PRIu32,
1174 bucket->watch_group);
1176 } else if (!strcasecmp(key, "bucket_id")) {
1177 error = str_to_u32(value, &bucket->bucket_id);
1178 if (!error && bucket->bucket_id > OFPG15_BUCKET_MAX) {
1179 error = xasprintf("invalid bucket_id id %"PRIu32,
1182 *usable_protocols &= OFPUTIL_P_OF15_UP;
1183 } else if (!strcasecmp(key, "action") || !strcasecmp(key, "actions")) {
1184 ds_put_format(&actions, "%s,", value);
1186 ds_put_format(&actions, "%s(%s),", key, value);
1190 ds_destroy(&actions);
1195 if (!actions.length) {
1196 return xstrdup("bucket must specify actions");
1198 ds_chomp(&actions, ',');
1200 ofpbuf_init(&ofpacts, 0);
1201 error = ofpacts_parse_actions(ds_cstr(&actions), &ofpacts,
1203 ds_destroy(&actions);
1205 ofpbuf_uninit(&ofpacts);
1208 bucket->ofpacts = ofpacts.data;
1209 bucket->ofpacts_len = ofpacts.size;
1214 static char * OVS_WARN_UNUSED_RESULT
1215 parse_select_group_field(char *s, struct field_array *fa,
1216 enum ofputil_protocol *usable_protocols)
1218 char *save_ptr = NULL;
1221 for (name = strtok_r(s, "=, \t\r\n", &save_ptr); name;
1222 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1223 const struct mf_field *mf = mf_from_name(name);
1227 const char *value_str;
1228 union mf_value value;
1230 if (bitmap_is_set(fa->used.bm, mf->id)) {
1231 return xasprintf("%s: duplicate field", name);
1234 value_str = strtok_r(NULL, ", \t\r\n", &save_ptr);
1236 error = mf_parse_value(mf, value_str, &value);
1241 /* The mask cannot be all-zeros */
1242 if (!mf_is_tun_metadata(mf) &&
1243 is_all_zeros(&value, mf->n_bytes)) {
1244 return xasprintf("%s: values are wildcards here "
1245 "and must not be all-zeros", s);
1248 /* The values parsed are masks for fields used
1249 * by the selection method */
1250 if (!mf_is_mask_valid(mf, &value)) {
1251 return xasprintf("%s: invalid mask for field %s",
1252 value_str, mf->name);
1255 memset(&value, 0xff, mf->n_bytes);
1258 field_array_set(mf->id, &value, fa);
1260 if (is_all_ones(&value, mf->n_bytes)) {
1261 *usable_protocols &= mf->usable_protocols_exact;
1262 } else if (mf->usable_protocols_bitwise == mf->usable_protocols_cidr
1263 || ip_is_cidr(value.be32)) {
1264 *usable_protocols &= mf->usable_protocols_cidr;
1266 *usable_protocols &= mf->usable_protocols_bitwise;
1269 return xasprintf("%s: unknown field %s", s, name);
1276 static char * OVS_WARN_UNUSED_RESULT
1277 parse_ofp_group_mod_str__(struct ofputil_group_mod *gm, uint16_t command,
1279 enum ofputil_protocol *usable_protocols)
1282 F_GROUP_TYPE = 1 << 0,
1284 F_COMMAND_BUCKET_ID = 1 << 2,
1285 F_COMMAND_BUCKET_ID_ALL = 1 << 3,
1287 char *save_ptr = NULL;
1288 bool had_type = false;
1289 bool had_command_bucket_id = false;
1291 struct ofputil_bucket *bucket;
1294 *usable_protocols = OFPUTIL_P_OF11_UP;
1298 fields = F_GROUP_TYPE | F_BUCKETS;
1301 case OFPGC11_DELETE:
1305 case OFPGC11_MODIFY:
1306 fields = F_GROUP_TYPE | F_BUCKETS;
1309 case OFPGC15_INSERT_BUCKET:
1310 fields = F_BUCKETS | F_COMMAND_BUCKET_ID;
1311 *usable_protocols &= OFPUTIL_P_OF15_UP;
1314 case OFPGC15_REMOVE_BUCKET:
1315 fields = F_COMMAND_BUCKET_ID | F_COMMAND_BUCKET_ID_ALL;
1316 *usable_protocols &= OFPUTIL_P_OF15_UP;
1323 memset(gm, 0, sizeof *gm);
1324 gm->command = command;
1325 gm->group_id = OFPG_ANY;
1326 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1327 list_init(&gm->buckets);
1328 if (command == OFPGC11_DELETE && string[0] == '\0') {
1329 gm->group_id = OFPG_ALL;
1333 *usable_protocols = OFPUTIL_P_OF11_UP;
1335 /* Strip the buckets off the end of 'string', if there are any, saving a
1336 * pointer for later. We want to parse the buckets last because the bucket
1337 * type influences bucket defaults. */
1338 char *bkt_str = strstr(string, "bucket=");
1340 if (!(fields & F_BUCKETS)) {
1341 error = xstrdup("bucket is not needed");
1347 /* Parse everything before the buckets. */
1348 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1349 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1352 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1354 error = xasprintf("field %s missing value", name);
1358 if (!strcmp(name, "command_bucket_id")) {
1359 if (!(fields & F_COMMAND_BUCKET_ID)) {
1360 error = xstrdup("command bucket id is not needed");
1363 if (!strcmp(value, "all")) {
1364 gm->command_bucket_id = OFPG15_BUCKET_ALL;
1365 } else if (!strcmp(value, "first")) {
1366 gm->command_bucket_id = OFPG15_BUCKET_FIRST;
1367 } else if (!strcmp(value, "last")) {
1368 gm->command_bucket_id = OFPG15_BUCKET_LAST;
1370 error = str_to_u32(value, &gm->command_bucket_id);
1374 if (gm->command_bucket_id > OFPG15_BUCKET_MAX
1375 && (gm->command_bucket_id != OFPG15_BUCKET_FIRST
1376 && gm->command_bucket_id != OFPG15_BUCKET_LAST
1377 && gm->command_bucket_id != OFPG15_BUCKET_ALL)) {
1378 error = xasprintf("invalid command bucket id %"PRIu32,
1379 gm->command_bucket_id);
1383 if (gm->command_bucket_id == OFPG15_BUCKET_ALL
1384 && !(fields & F_COMMAND_BUCKET_ID_ALL)) {
1385 error = xstrdup("command_bucket_id=all is not permitted");
1388 had_command_bucket_id = true;
1389 } else if (!strcmp(name, "group_id")) {
1390 if(!strcmp(value, "all")) {
1391 gm->group_id = OFPG_ALL;
1393 error = str_to_u32(value, &gm->group_id);
1397 if (gm->group_id != OFPG_ALL && gm->group_id > OFPG_MAX) {
1398 error = xasprintf("invalid group id %"PRIu32,
1403 } else if (!strcmp(name, "type")){
1404 if (!(fields & F_GROUP_TYPE)) {
1405 error = xstrdup("type is not needed");
1408 if (!strcmp(value, "all")) {
1409 gm->type = OFPGT11_ALL;
1410 } else if (!strcmp(value, "select")) {
1411 gm->type = OFPGT11_SELECT;
1412 } else if (!strcmp(value, "indirect")) {
1413 gm->type = OFPGT11_INDIRECT;
1414 } else if (!strcmp(value, "ff") ||
1415 !strcmp(value, "fast_failover")) {
1416 gm->type = OFPGT11_FF;
1418 error = xasprintf("invalid group type %s", value);
1422 } else if (!strcmp(name, "selection_method")) {
1423 if (!(fields & F_GROUP_TYPE)) {
1424 error = xstrdup("selection method is not needed");
1427 if (strlen(value) >= NTR_MAX_SELECTION_METHOD_LEN) {
1428 error = xasprintf("selection method is longer than %u"
1430 NTR_MAX_SELECTION_METHOD_LEN - 1);
1433 memset(gm->props.selection_method, '\0',
1434 NTR_MAX_SELECTION_METHOD_LEN);
1435 strcpy(gm->props.selection_method, value);
1436 *usable_protocols &= OFPUTIL_P_OF15_UP;
1437 } else if (!strcmp(name, "selection_method_param")) {
1438 if (!(fields & F_GROUP_TYPE)) {
1439 error = xstrdup("selection method param is not needed");
1442 error = str_to_u64(value, &gm->props.selection_method_param);
1446 *usable_protocols &= OFPUTIL_P_OF15_UP;
1447 } else if (!strcmp(name, "fields")) {
1448 if (!(fields & F_GROUP_TYPE)) {
1449 error = xstrdup("fields are not needed");
1452 error = parse_select_group_field(value, &gm->props.fields,
1457 *usable_protocols &= OFPUTIL_P_OF15_UP;
1459 error = xasprintf("unknown keyword %s", name);
1463 if (gm->group_id == OFPG_ANY) {
1464 error = xstrdup("must specify a group_id");
1467 if (fields & F_GROUP_TYPE && !had_type) {
1468 error = xstrdup("must specify a type");
1472 if (fields & F_COMMAND_BUCKET_ID) {
1473 if (!(fields & F_COMMAND_BUCKET_ID_ALL || had_command_bucket_id)) {
1474 error = xstrdup("must specify a command bucket id");
1477 } else if (had_command_bucket_id) {
1478 error = xstrdup("command bucket id is not needed");
1482 /* Now parse the buckets, if any. */
1486 bkt_str = strchr(bkt_str + 1, '=');
1488 error = xstrdup("must specify bucket content");
1493 next_bkt_str = strstr(bkt_str, "bucket=");
1495 *next_bkt_str = '\0';
1498 bucket = xzalloc(sizeof(struct ofputil_bucket));
1499 error = parse_bucket_str(bucket, bkt_str, gm->type, usable_protocols);
1504 list_push_back(&gm->buckets, &bucket->list_node);
1506 if (gm->type != OFPGT11_SELECT && bucket->weight) {
1507 error = xstrdup("Only select groups can have bucket weights.");
1511 bkt_str = next_bkt_str;
1513 if (gm->type == OFPGT11_INDIRECT && !list_is_short(&gm->buckets)) {
1514 error = xstrdup("Indirect groups can have at most one bucket.");
1520 ofputil_bucket_list_destroy(&gm->buckets);
1524 char * OVS_WARN_UNUSED_RESULT
1525 parse_ofp_group_mod_str(struct ofputil_group_mod *gm, uint16_t command,
1527 enum ofputil_protocol *usable_protocols)
1529 char *string = xstrdup(str_);
1530 char *error = parse_ofp_group_mod_str__(gm, command, string,
1535 ofputil_bucket_list_destroy(&gm->buckets);
1540 char * OVS_WARN_UNUSED_RESULT
1541 parse_ofp_group_mod_file(const char *file_name, uint16_t command,
1542 struct ofputil_group_mod **gms, size_t *n_gms,
1543 enum ofputil_protocol *usable_protocols)
1545 size_t allocated_gms;
1553 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1554 if (stream == NULL) {
1555 return xasprintf("%s: open failed (%s)",
1556 file_name, ovs_strerror(errno));
1559 allocated_gms = *n_gms;
1562 *usable_protocols = OFPUTIL_P_OF11_UP;
1563 while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
1564 enum ofputil_protocol usable;
1567 if (*n_gms >= allocated_gms) {
1568 struct ofputil_group_mod *new_gms;
1571 new_gms = x2nrealloc(*gms, &allocated_gms, sizeof **gms);
1572 for (i = 0; i < *n_gms; i++) {
1573 list_moved(&new_gms[i].buckets, &(*gms)[i].buckets);
1577 error = parse_ofp_group_mod_str(&(*gms)[*n_gms], command, ds_cstr(&s),
1582 for (i = 0; i < *n_gms; i++) {
1583 ofputil_bucket_list_destroy(&(*gms)[i].buckets);
1590 if (stream != stdin) {
1594 return xasprintf("%s:%d: %s", file_name, line_number, error);
1596 *usable_protocols &= usable;
1601 if (stream != stdin) {
1607 char * OVS_WARN_UNUSED_RESULT
1608 parse_ofp_geneve_table_mod_str(struct ofputil_geneve_table_mod *gtm,
1609 uint16_t command, const char *s,
1610 enum ofputil_protocol *usable_protocols)
1612 *usable_protocols = OFPUTIL_P_NXM_OXM_ANY;
1614 gtm->command = command;
1615 list_init(>m->mappings);
1618 struct ofputil_geneve_map *map = xmalloc(sizeof *map);
1625 list_push_back(>m->mappings, &map->list_node);
1627 if (!ovs_scan(s, "{class=%"SCNi16",type=%"SCNi8",len=%"SCNi8"}->tun_metadata%"SCNi16"%n",
1628 &map->option_class, &map->option_type, &map->option_len,
1630 ofputil_uninit_geneve_table(>m->mappings);
1631 return xstrdup("invalid geneve mapping");