2 * Copyright (c) 2010, 2011, 2012 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"
27 #include "byte-order.h"
28 #include "dynamic-string.h"
30 #include "meta-flow.h"
31 #include "multipath.h"
34 #include "ofp-actions.h"
37 #include "openflow/openflow.h"
39 #include "socket-util.h"
43 VLOG_DEFINE_THIS_MODULE(ofp_parse);
45 static void ofp_fatal(const char *flow, bool verbose, const char *format, ...)
49 str_to_table_id(const char *str)
53 if (!str_to_int(str, 10, &table_id) || table_id < 0 || table_id > 255) {
54 ovs_fatal(0, "invalid table \"%s\"", str);
60 str_to_u16(const char *str, const char *name)
64 if (!str_to_int(str, 0, &value) || value < 0 || value > 65535) {
65 ovs_fatal(0, "invalid %s \"%s\"", name, str);
71 str_to_u32(const char *str)
77 ovs_fatal(0, "missing required numeric argument");
81 value = strtoul(str, &tail, 0);
82 if (errno == EINVAL || errno == ERANGE || *tail) {
83 ovs_fatal(0, "invalid numeric format %s", str);
89 str_to_u64(const char *str)
95 ovs_fatal(0, "missing required numeric argument");
99 value = strtoull(str, &tail, 0);
100 if (errno == EINVAL || errno == ERANGE || *tail) {
101 ovs_fatal(0, "invalid numeric format %s", str);
107 str_to_mac(const char *str, uint8_t mac[6])
109 if (sscanf(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
110 != ETH_ADDR_SCAN_COUNT) {
111 ovs_fatal(0, "invalid mac address %s", str);
116 str_to_ip(const char *str, ovs_be32 *ip)
118 struct in_addr in_addr;
120 if (lookup_ip(str, &in_addr)) {
121 ovs_fatal(0, "%s: could not convert to IP address", str);
123 *ip = in_addr.s_addr;
127 parse_enqueue(char *arg, struct ofpbuf *ofpacts)
130 char *port = strtok_r(arg, ":q", &sp);
131 char *queue = strtok_r(NULL, "", &sp);
132 struct ofpact_enqueue *enqueue;
134 if (port == NULL || queue == NULL) {
135 ovs_fatal(0, "\"enqueue\" syntax is \"enqueue:PORT:QUEUE\"");
138 enqueue = ofpact_put_ENQUEUE(ofpacts);
139 enqueue->port = str_to_u32(port);
140 enqueue->queue = str_to_u32(queue);
144 parse_output(char *arg, struct ofpbuf *ofpacts)
146 if (strchr(arg, '[')) {
147 struct ofpact_output_reg *output_reg;
149 output_reg = ofpact_put_OUTPUT_REG(ofpacts);
150 mf_parse_subfield(&output_reg->src, arg);
151 output_reg->max_len = UINT16_MAX;
153 struct ofpact_output *output;
155 output = ofpact_put_OUTPUT(ofpacts);
156 output->port = str_to_u32(arg);
157 output->max_len = output->port == OFPP_CONTROLLER ? UINT16_MAX : 0;
162 parse_resubmit(char *arg, struct ofpbuf *ofpacts)
164 struct ofpact_resubmit *resubmit;
165 char *in_port_s, *table_s;
167 resubmit = ofpact_put_RESUBMIT(ofpacts);
169 in_port_s = strsep(&arg, ",");
170 if (in_port_s && in_port_s[0]) {
171 resubmit->in_port = ofputil_port_from_string(in_port_s);
172 if (!resubmit->in_port) {
173 ovs_fatal(0, "%s: resubmit to unknown port", in_port_s);
176 resubmit->in_port = OFPP_IN_PORT;
179 table_s = strsep(&arg, ",");
180 resubmit->table_id = table_s && table_s[0] ? str_to_u32(table_s) : 255;
182 if (resubmit->in_port == OFPP_IN_PORT && resubmit->table_id == 255) {
183 ovs_fatal(0, "at least one \"in_port\" or \"table\" must be specified "
189 parse_note(const char *arg, struct ofpbuf *ofpacts)
191 struct ofpact_note *note;
193 note = ofpact_put_NOTE(ofpacts);
194 while (*arg != '\0') {
205 byte = hexits_value(arg, 2, &ok);
207 ovs_fatal(0, "bad hex digit in `note' argument");
209 ofpbuf_put(ofpacts, &byte, 1);
216 ofpact_update_len(ofpacts, ¬e->ofpact);
220 parse_fin_timeout(struct ofpbuf *b, char *arg)
222 struct ofpact_fin_timeout *oft = ofpact_put_FIN_TIMEOUT(b);
225 while (ofputil_parse_key_value(&arg, &key, &value)) {
226 if (!strcmp(key, "idle_timeout")) {
227 oft->fin_idle_timeout = str_to_u16(value, key);
228 } else if (!strcmp(key, "hard_timeout")) {
229 oft->fin_hard_timeout = str_to_u16(value, key);
231 ovs_fatal(0, "invalid key '%s' in 'fin_timeout' argument", key);
237 parse_controller(struct ofpbuf *b, char *arg)
239 enum ofp_packet_in_reason reason = OFPR_ACTION;
240 uint16_t controller_id = 0;
241 uint16_t max_len = UINT16_MAX;
245 } else if (strspn(arg, "0123456789") == strlen(arg)) {
246 max_len = str_to_u16(arg, "max_len");
250 while (ofputil_parse_key_value(&arg, &name, &value)) {
251 if (!strcmp(name, "reason")) {
252 if (!ofputil_packet_in_reason_from_string(value, &reason)) {
253 ovs_fatal(0, "unknown reason \"%s\"", value);
255 } else if (!strcmp(name, "max_len")) {
256 max_len = str_to_u16(value, "max_len");
257 } else if (!strcmp(name, "id")) {
258 controller_id = str_to_u16(value, "id");
260 ovs_fatal(0, "unknown key \"%s\" parsing controller action",
266 if (reason == OFPR_ACTION && controller_id == 0) {
267 struct ofpact_output *output;
269 output = ofpact_put_OUTPUT(b);
270 output->port = OFPP_CONTROLLER;
271 output->max_len = max_len;
273 struct ofpact_controller *controller;
275 controller = ofpact_put_CONTROLLER(b);
276 controller->max_len = max_len;
277 controller->reason = reason;
278 controller->controller_id = controller_id;
283 parse_dec_ttl(struct ofpbuf *b, char *arg)
285 struct ofpact_cnt_ids *ids;
287 ids = ofpact_put_DEC_TTL(b);
292 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL;
293 ofpbuf_put(b, &id, sizeof id);
295 ids->n_controllers++;
299 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL_CNT_IDS;
300 for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL;
301 cntr = strtok_r(NULL, ", ", &arg)) {
302 uint16_t id = atoi(cntr);
304 ofpbuf_put(b, &id, sizeof id);
306 ids->n_controllers++;
308 if (!ids->n_controllers) {
309 ovs_fatal(0, "dec_ttl_cnt_ids: expected at least one controller "
314 ofpact_update_len(b, &ids->ofpact);
318 set_field_parse(const char *arg, struct ofpbuf *ofpacts)
320 char *orig = xstrdup(arg);
321 struct ofpact_reg_load *load = ofpact_put_REG_LOAD(ofpacts);
325 const struct mf_field *mf;
327 union mf_value mf_value;
330 delim = strstr(orig, "->");
332 ovs_fatal(0, "%s: missing `->'", orig);
334 if (strlen(delim) <= strlen("->")) {
335 ovs_fatal(0, "%s: missing field name following `->'", orig);
338 key = delim + strlen("->");
339 mf = mf_from_name(key);
341 ovs_fatal(0, "%s is not valid oxm field name", key);
344 ovs_fatal(0, "%s is not allowed to set", key);
348 error = mf_parse_value(mf, value, &mf_value);
350 ovs_fatal(0, "%s", error);
352 if (!mf_is_value_valid(mf, &mf_value)) {
353 ovs_fatal(0, "%s is not valid valid for field %s", value, key);
355 ofpact_set_field_init(load, mf, &mf_value);
360 parse_named_action(enum ofputil_action_code code, const struct flow *flow,
361 char *arg, struct ofpbuf *ofpacts)
363 struct ofpact_tunnel *tunnel;
370 case OFPUTIL_ACTION_INVALID:
373 case OFPUTIL_OFPAT10_OUTPUT:
374 case OFPUTIL_OFPAT11_OUTPUT:
375 parse_output(arg, ofpacts);
378 case OFPUTIL_OFPAT10_SET_VLAN_VID:
379 case OFPUTIL_OFPAT11_SET_VLAN_VID:
380 vid = str_to_u32(arg);
381 if (vid & ~VLAN_VID_MASK) {
382 ovs_fatal(0, "%s: not a valid VLAN VID", arg);
384 ofpact_put_SET_VLAN_VID(ofpacts)->vlan_vid = vid;
387 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
388 case OFPUTIL_OFPAT11_SET_VLAN_PCP:
389 pcp = str_to_u32(arg);
391 ovs_fatal(0, "%s: not a valid VLAN PCP", arg);
393 ofpact_put_SET_VLAN_PCP(ofpacts)->vlan_pcp = pcp;
396 case OFPUTIL_OFPAT12_SET_FIELD:
397 set_field_parse(arg, ofpacts);
400 case OFPUTIL_OFPAT10_STRIP_VLAN:
401 ofpact_put_STRIP_VLAN(ofpacts);
404 case OFPUTIL_OFPAT10_SET_DL_SRC:
405 case OFPUTIL_OFPAT11_SET_DL_SRC:
406 str_to_mac(arg, ofpact_put_SET_ETH_SRC(ofpacts)->mac);
409 case OFPUTIL_OFPAT10_SET_DL_DST:
410 case OFPUTIL_OFPAT11_SET_DL_DST:
411 str_to_mac(arg, ofpact_put_SET_ETH_DST(ofpacts)->mac);
414 case OFPUTIL_OFPAT10_SET_NW_SRC:
415 case OFPUTIL_OFPAT11_SET_NW_SRC:
417 ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4 = ip;
420 case OFPUTIL_OFPAT10_SET_NW_DST:
421 case OFPUTIL_OFPAT11_SET_NW_DST:
423 ofpact_put_SET_IPV4_DST(ofpacts)->ipv4 = ip;
426 case OFPUTIL_OFPAT10_SET_NW_TOS:
427 case OFPUTIL_OFPAT11_SET_NW_TOS:
428 tos = str_to_u32(arg);
429 if (tos & ~IP_DSCP_MASK) {
430 ovs_fatal(0, "%s: not a valid TOS", arg);
432 ofpact_put_SET_IPV4_DSCP(ofpacts)->dscp = tos;
435 case OFPUTIL_OFPAT10_SET_TP_SRC:
436 case OFPUTIL_OFPAT11_SET_TP_SRC:
437 ofpact_put_SET_L4_SRC_PORT(ofpacts)->port = str_to_u32(arg);
440 case OFPUTIL_OFPAT10_SET_TP_DST:
441 case OFPUTIL_OFPAT11_SET_TP_DST:
442 ofpact_put_SET_L4_DST_PORT(ofpacts)->port = str_to_u32(arg);
445 case OFPUTIL_OFPAT10_ENQUEUE:
446 parse_enqueue(arg, ofpacts);
449 case OFPUTIL_NXAST_RESUBMIT:
450 parse_resubmit(arg, ofpacts);
453 case OFPUTIL_NXAST_SET_TUNNEL:
454 case OFPUTIL_NXAST_SET_TUNNEL64:
455 tunnel = ofpact_put_SET_TUNNEL(ofpacts);
456 tunnel->ofpact.compat = code;
457 tunnel->tun_id = str_to_u64(arg);
460 case OFPUTIL_NXAST_SET_QUEUE:
461 ofpact_put_SET_QUEUE(ofpacts)->queue_id = str_to_u32(arg);
464 case OFPUTIL_NXAST_POP_QUEUE:
465 ofpact_put_POP_QUEUE(ofpacts);
468 case OFPUTIL_NXAST_REG_MOVE:
469 nxm_parse_reg_move(ofpact_put_REG_MOVE(ofpacts), arg);
472 case OFPUTIL_NXAST_REG_LOAD:
473 nxm_parse_reg_load(ofpact_put_REG_LOAD(ofpacts), arg);
476 case OFPUTIL_NXAST_NOTE:
477 parse_note(arg, ofpacts);
480 case OFPUTIL_NXAST_MULTIPATH:
481 multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg);
484 case OFPUTIL_NXAST_AUTOPATH__DEPRECATED:
485 autopath_parse(ofpact_put_AUTOPATH(ofpacts), arg);
488 case OFPUTIL_NXAST_BUNDLE:
489 bundle_parse(arg, ofpacts);
492 case OFPUTIL_NXAST_BUNDLE_LOAD:
493 bundle_parse_load(arg, ofpacts);
496 case OFPUTIL_NXAST_RESUBMIT_TABLE:
497 case OFPUTIL_NXAST_OUTPUT_REG:
498 case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
501 case OFPUTIL_NXAST_LEARN:
502 learn_parse(arg, flow, ofpacts);
505 case OFPUTIL_NXAST_EXIT:
506 ofpact_put_EXIT(ofpacts);
509 case OFPUTIL_NXAST_DEC_TTL:
510 parse_dec_ttl(ofpacts, arg);
513 case OFPUTIL_NXAST_FIN_TIMEOUT:
514 parse_fin_timeout(ofpacts, arg);
517 case OFPUTIL_NXAST_CONTROLLER:
518 parse_controller(ofpacts, arg);
524 str_to_ofpacts(const struct flow *flow, char *str, struct ofpbuf *ofpacts)
526 char *pos, *act, *arg;
531 while (ofputil_parse_key_value(&pos, &act, &arg)) {
532 int code = ofputil_action_code_from_name(act);
534 parse_named_action(code, flow, arg, ofpacts);
535 } else if (!strcasecmp(act, "drop")) {
537 ovs_fatal(0, "Drop actions must not be preceded by other "
539 } else if (ofputil_parse_key_value(&pos, &act, &arg)) {
540 ovs_fatal(0, "Drop actions must not be followed by other "
545 uint16_t port = ofputil_port_from_string(act);
547 ofpact_put_OUTPUT(ofpacts)->port = port;
549 ovs_fatal(0, "Unknown action: %s", act);
564 parse_protocol(const char *name, const struct protocol **p_out)
566 static const struct protocol protocols[] = {
567 { "ip", ETH_TYPE_IP, 0 },
568 { "arp", ETH_TYPE_ARP, 0 },
569 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
570 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
571 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
572 { "ipv6", ETH_TYPE_IPV6, 0 },
573 { "ip6", ETH_TYPE_IPV6, 0 },
574 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
575 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
576 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
578 const struct protocol *p;
580 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
581 if (!strcmp(p->name, name)) {
591 ofp_fatal(const char *flow, bool verbose, const char *format, ...)
596 fprintf(stderr, "%s:\n", flow);
599 va_start(args, format);
600 ovs_fatal_valist(0, format, args);
604 parse_field(const struct mf_field *mf, const char *s, struct match *match)
606 union mf_value value, mask;
609 error = mf_parse(mf, s, &value, &mask);
611 ovs_fatal(0, "%s", error);
614 mf_set(mf, &value, &mask, match);
617 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
618 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
619 * If 'actions' is specified, an action must be in 'string' and may be expanded
622 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
623 * constant for 'command'. To parse syntax for an OFPST_FLOW or
624 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'. */
626 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
636 char *string = xstrdup(str_);
637 char *save_ptr = NULL;
638 char *act_str = NULL;
647 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
654 case OFPFC_DELETE_STRICT:
655 fields = F_OUT_PORT | F_PRIORITY;
659 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
662 case OFPFC_MODIFY_STRICT:
663 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
670 match_init_catchall(&fm->match);
671 fm->priority = OFP_DEFAULT_PRIORITY;
672 fm->cookie = htonll(0);
673 fm->cookie_mask = htonll(0);
674 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
675 /* For modify, by default, don't update the cookie. */
676 fm->new_cookie = htonll(UINT64_MAX);
678 fm->new_cookie = htonll(0);
681 fm->command = command;
682 fm->idle_timeout = OFP_FLOW_PERMANENT;
683 fm->hard_timeout = OFP_FLOW_PERMANENT;
684 fm->buffer_id = UINT32_MAX;
685 fm->out_port = OFPP_NONE;
687 if (fields & F_ACTIONS) {
688 act_str = strstr(string, "action");
690 ofp_fatal(str_, verbose, "must specify an action");
694 act_str = strchr(act_str + 1, '=');
696 ofp_fatal(str_, verbose, "must specify an action");
701 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
702 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
703 const struct protocol *p;
705 if (parse_protocol(name, &p)) {
706 match_set_dl_type(&fm->match, htons(p->dl_type));
708 match_set_nw_proto(&fm->match, p->nw_proto);
710 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
711 fm->flags |= OFPFF_SEND_FLOW_REM;
712 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
713 fm->flags |= OFPFF_CHECK_OVERLAP;
717 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
719 ofp_fatal(str_, verbose, "field %s missing value", name);
722 if (!strcmp(name, "table")) {
723 fm->table_id = str_to_table_id(value);
724 } else if (!strcmp(name, "out_port")) {
725 fm->out_port = ofputil_port_from_string(name);
727 ofp_fatal(str_, verbose, "%s is not a valid OpenFlow port",
730 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
731 fm->priority = str_to_u16(value, name);
732 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
733 fm->idle_timeout = str_to_u16(value, name);
734 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
735 fm->hard_timeout = str_to_u16(value, name);
736 } else if (!strcmp(name, "cookie")) {
737 char *mask = strchr(value, '/');
740 /* A mask means we're searching for a cookie. */
741 if (command == OFPFC_ADD) {
742 ofp_fatal(str_, verbose, "flow additions cannot use "
746 fm->cookie = htonll(str_to_u64(value));
747 fm->cookie_mask = htonll(str_to_u64(mask+1));
749 /* No mask means that the cookie is being set. */
750 if (command != OFPFC_ADD && command != OFPFC_MODIFY
751 && command != OFPFC_MODIFY_STRICT) {
752 ofp_fatal(str_, verbose, "cannot set cookie");
754 fm->new_cookie = htonll(str_to_u64(value));
756 } else if (mf_from_name(name)) {
757 parse_field(mf_from_name(name), value, &fm->match);
758 } else if (!strcmp(name, "duration")
759 || !strcmp(name, "n_packets")
760 || !strcmp(name, "n_bytes")) {
761 /* Ignore these, so that users can feed the output of
762 * "ovs-ofctl dump-flows" back into commands that parse
765 ofp_fatal(str_, verbose, "unknown keyword %s", name);
769 if (!fm->cookie_mask && fm->new_cookie == htonll(UINT64_MAX)
770 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
771 /* On modifies without a mask, we are supposed to add a flow if
772 * one does not exist. If a cookie wasn't been specified, use a
773 * default of zero. */
774 fm->new_cookie = htonll(0);
776 if (fields & F_ACTIONS) {
777 struct ofpbuf ofpacts;
779 ofpbuf_init(&ofpacts, 32);
780 str_to_ofpacts(&fm->match.flow, act_str, &ofpacts);
781 fm->ofpacts_len = ofpacts.size;
782 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
791 /* Convert 'str_' (as described in the documentation for the "monitor" command
792 * in the ovs-ofctl man page) into 'fmr'. */
794 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
799 char *string = xstrdup(str_);
800 char *save_ptr = NULL;
804 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
805 | NXFMF_OWN | NXFMF_ACTIONS);
806 fmr->out_port = OFPP_NONE;
807 fmr->table_id = 0xff;
808 match_init_catchall(&fmr->match);
810 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
811 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
812 const struct protocol *p;
814 if (!strcmp(name, "!initial")) {
815 fmr->flags &= ~NXFMF_INITIAL;
816 } else if (!strcmp(name, "!add")) {
817 fmr->flags &= ~NXFMF_ADD;
818 } else if (!strcmp(name, "!delete")) {
819 fmr->flags &= ~NXFMF_DELETE;
820 } else if (!strcmp(name, "!modify")) {
821 fmr->flags &= ~NXFMF_MODIFY;
822 } else if (!strcmp(name, "!actions")) {
823 fmr->flags &= ~NXFMF_ACTIONS;
824 } else if (!strcmp(name, "!own")) {
825 fmr->flags &= ~NXFMF_OWN;
826 } else if (parse_protocol(name, &p)) {
827 match_set_dl_type(&fmr->match, htons(p->dl_type));
829 match_set_nw_proto(&fmr->match, p->nw_proto);
834 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
836 ovs_fatal(0, "%s: field %s missing value", str_, name);
839 if (!strcmp(name, "table")) {
840 fmr->table_id = str_to_table_id(value);
841 } else if (!strcmp(name, "out_port")) {
842 fmr->out_port = atoi(value);
843 } else if (mf_from_name(name)) {
844 parse_field(mf_from_name(name), value, &fmr->match);
846 ovs_fatal(0, "%s: unknown keyword %s", str_, name);
853 /* Parses 's' as a set of OpenFlow actions and appends the actions to
856 * Prints an error on stderr and aborts the program if 's' syntax is
859 parse_ofpacts(const char *s_, struct ofpbuf *ofpacts)
861 char *s = xstrdup(s_);
862 str_to_ofpacts(NULL, s, ofpacts);
866 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
867 * (one of OFPFC_*) into 'fm'. */
869 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
870 uint16_t command, bool verbose)
872 struct match match_copy;
874 parse_ofp_str(fm, command, string, verbose);
876 /* Normalize a copy of the match. This ensures that non-normalized flows
877 * get logged but doesn't affect what gets sent to the switch, so that the
878 * switch can do whatever it likes with the flow. */
879 match_copy = fm->match;
880 ofputil_normalize_match(&match_copy);
884 parse_ofp_flow_mod_file(const char *file_name, uint16_t command,
885 struct ofputil_flow_mod **fms, size_t *n_fms)
887 size_t allocated_fms;
891 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
892 if (stream == NULL) {
893 ovs_fatal(errno, "%s: open", file_name);
896 allocated_fms = *n_fms;
898 while (!ds_get_preprocessed_line(&s, stream)) {
899 if (*n_fms >= allocated_fms) {
900 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
902 parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command, false);
907 if (stream != stdin) {
913 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
914 bool aggregate, const char *string)
916 struct ofputil_flow_mod fm;
918 parse_ofp_str(&fm, -1, string, false);
919 fsr->aggregate = aggregate;
920 fsr->cookie = fm.cookie;
921 fsr->cookie_mask = fm.cookie_mask;
922 fsr->match = fm.match;
923 fsr->out_port = fm.out_port;
924 fsr->table_id = fm.table_id;
927 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
928 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
929 * mf_field. Fields must be specified in a natural order for satisfying
932 * Returns NULL on success, otherwise a malloc()'d string that explains the
935 parse_ofp_exact_flow(struct flow *flow, const char *s)
937 char *pos, *key, *value_s;
941 memset(flow, 0, sizeof *flow);
943 pos = copy = xstrdup(s);
944 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
945 const struct protocol *p;
946 if (parse_protocol(key, &p)) {
948 error = xasprintf("%s: Ethernet type set multiple times", s);
951 flow->dl_type = htons(p->dl_type);
954 if (flow->nw_proto) {
955 error = xasprintf("%s: network protocol set "
956 "multiple times", s);
959 flow->nw_proto = p->nw_proto;
962 const struct mf_field *mf;
963 union mf_value value;
966 mf = mf_from_name(key);
968 error = xasprintf("%s: unknown field %s", s, key);
972 if (!mf_are_prereqs_ok(mf, flow)) {
973 error = xasprintf("%s: prerequisites not met for setting %s",
978 if (!mf_is_zero(mf, flow)) {
979 error = xasprintf("%s: field %s set multiple times", s, key);
983 field_error = mf_parse_value(mf, value_s, &value);
985 error = xasprintf("%s: bad value for %s (%s)",
986 s, key, field_error);
991 mf_set_flow_value(mf, &value, flow);
999 memset(flow, 0, sizeof *flow);