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 if (!ofputil_port_from_string(in_port_s, &resubmit->in_port)) {
172 ovs_fatal(0, "%s: resubmit to unknown port", in_port_s);
175 resubmit->in_port = OFPP_IN_PORT;
178 table_s = strsep(&arg, ",");
179 resubmit->table_id = table_s && table_s[0] ? str_to_u32(table_s) : 255;
181 if (resubmit->in_port == OFPP_IN_PORT && resubmit->table_id == 255) {
182 ovs_fatal(0, "at least one \"in_port\" or \"table\" must be specified "
188 parse_note(const char *arg, struct ofpbuf *ofpacts)
190 struct ofpact_note *note;
192 note = ofpact_put_NOTE(ofpacts);
193 while (*arg != '\0') {
204 byte = hexits_value(arg, 2, &ok);
206 ovs_fatal(0, "bad hex digit in `note' argument");
208 ofpbuf_put(ofpacts, &byte, 1);
215 ofpact_update_len(ofpacts, ¬e->ofpact);
219 parse_fin_timeout(struct ofpbuf *b, char *arg)
221 struct ofpact_fin_timeout *oft = ofpact_put_FIN_TIMEOUT(b);
224 while (ofputil_parse_key_value(&arg, &key, &value)) {
225 if (!strcmp(key, "idle_timeout")) {
226 oft->fin_idle_timeout = str_to_u16(value, key);
227 } else if (!strcmp(key, "hard_timeout")) {
228 oft->fin_hard_timeout = str_to_u16(value, key);
230 ovs_fatal(0, "invalid key '%s' in 'fin_timeout' argument", key);
236 parse_controller(struct ofpbuf *b, char *arg)
238 enum ofp_packet_in_reason reason = OFPR_ACTION;
239 uint16_t controller_id = 0;
240 uint16_t max_len = UINT16_MAX;
244 } else if (strspn(arg, "0123456789") == strlen(arg)) {
245 max_len = str_to_u16(arg, "max_len");
249 while (ofputil_parse_key_value(&arg, &name, &value)) {
250 if (!strcmp(name, "reason")) {
251 if (!ofputil_packet_in_reason_from_string(value, &reason)) {
252 ovs_fatal(0, "unknown reason \"%s\"", value);
254 } else if (!strcmp(name, "max_len")) {
255 max_len = str_to_u16(value, "max_len");
256 } else if (!strcmp(name, "id")) {
257 controller_id = str_to_u16(value, "id");
259 ovs_fatal(0, "unknown key \"%s\" parsing controller action",
265 if (reason == OFPR_ACTION && controller_id == 0) {
266 struct ofpact_output *output;
268 output = ofpact_put_OUTPUT(b);
269 output->port = OFPP_CONTROLLER;
270 output->max_len = max_len;
272 struct ofpact_controller *controller;
274 controller = ofpact_put_CONTROLLER(b);
275 controller->max_len = max_len;
276 controller->reason = reason;
277 controller->controller_id = controller_id;
282 parse_noargs_dec_ttl(struct ofpbuf *b, enum ofputil_action_code compat)
284 struct ofpact_cnt_ids *ids;
287 ids = ofpact_put_DEC_TTL(b);
288 ids->ofpact.compat = compat;
289 ofpbuf_put(b, &id, sizeof id);
291 ids->n_controllers++;
292 ofpact_update_len(b, &ids->ofpact);
296 parse_dec_ttl(struct ofpbuf *b, char *arg, enum ofputil_action_code compat)
299 parse_noargs_dec_ttl(b, compat);
301 struct ofpact_cnt_ids *ids;
304 ids = ofpact_put_DEC_TTL(b);
305 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL_CNT_IDS;
306 for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL;
307 cntr = strtok_r(NULL, ", ", &arg)) {
308 uint16_t id = atoi(cntr);
310 ofpbuf_put(b, &id, sizeof id);
312 ids->n_controllers++;
314 if (!ids->n_controllers) {
315 ovs_fatal(0, "dec_ttl_cnt_ids: expected at least one controller "
318 ofpact_update_len(b, &ids->ofpact);
323 set_field_parse(const char *arg, struct ofpbuf *ofpacts)
325 char *orig = xstrdup(arg);
326 struct ofpact_reg_load *load = ofpact_put_REG_LOAD(ofpacts);
330 const struct mf_field *mf;
332 union mf_value mf_value;
335 delim = strstr(orig, "->");
337 ovs_fatal(0, "%s: missing `->'", orig);
339 if (strlen(delim) <= strlen("->")) {
340 ovs_fatal(0, "%s: missing field name following `->'", orig);
343 key = delim + strlen("->");
344 mf = mf_from_name(key);
346 ovs_fatal(0, "%s is not valid oxm field name", key);
349 ovs_fatal(0, "%s is not allowed to set", key);
353 error = mf_parse_value(mf, value, &mf_value);
355 ovs_fatal(0, "%s", error);
357 if (!mf_is_value_valid(mf, &mf_value)) {
358 ovs_fatal(0, "%s is not valid valid for field %s", value, key);
360 ofpact_set_field_init(load, mf, &mf_value);
365 parse_named_action(enum ofputil_action_code code, const struct flow *flow,
366 char *arg, struct ofpbuf *ofpacts)
368 struct ofpact_tunnel *tunnel;
375 case OFPUTIL_ACTION_INVALID:
378 case OFPUTIL_OFPAT10_OUTPUT:
379 case OFPUTIL_OFPAT11_OUTPUT:
380 parse_output(arg, ofpacts);
383 case OFPUTIL_OFPAT10_SET_VLAN_VID:
384 case OFPUTIL_OFPAT11_SET_VLAN_VID:
385 vid = str_to_u32(arg);
386 if (vid & ~VLAN_VID_MASK) {
387 ovs_fatal(0, "%s: not a valid VLAN VID", arg);
389 ofpact_put_SET_VLAN_VID(ofpacts)->vlan_vid = vid;
392 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
393 case OFPUTIL_OFPAT11_SET_VLAN_PCP:
394 pcp = str_to_u32(arg);
396 ovs_fatal(0, "%s: not a valid VLAN PCP", arg);
398 ofpact_put_SET_VLAN_PCP(ofpacts)->vlan_pcp = pcp;
401 case OFPUTIL_OFPAT12_SET_FIELD:
402 set_field_parse(arg, ofpacts);
405 case OFPUTIL_OFPAT10_STRIP_VLAN:
406 ofpact_put_STRIP_VLAN(ofpacts);
409 case OFPUTIL_OFPAT10_SET_DL_SRC:
410 case OFPUTIL_OFPAT11_SET_DL_SRC:
411 str_to_mac(arg, ofpact_put_SET_ETH_SRC(ofpacts)->mac);
414 case OFPUTIL_OFPAT10_SET_DL_DST:
415 case OFPUTIL_OFPAT11_SET_DL_DST:
416 str_to_mac(arg, ofpact_put_SET_ETH_DST(ofpacts)->mac);
419 case OFPUTIL_OFPAT10_SET_NW_SRC:
420 case OFPUTIL_OFPAT11_SET_NW_SRC:
422 ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4 = ip;
425 case OFPUTIL_OFPAT10_SET_NW_DST:
426 case OFPUTIL_OFPAT11_SET_NW_DST:
428 ofpact_put_SET_IPV4_DST(ofpacts)->ipv4 = ip;
431 case OFPUTIL_OFPAT10_SET_NW_TOS:
432 case OFPUTIL_OFPAT11_SET_NW_TOS:
433 tos = str_to_u32(arg);
434 if (tos & ~IP_DSCP_MASK) {
435 ovs_fatal(0, "%s: not a valid TOS", arg);
437 ofpact_put_SET_IPV4_DSCP(ofpacts)->dscp = tos;
440 case OFPUTIL_OFPAT11_DEC_NW_TTL:
441 parse_noargs_dec_ttl(ofpacts, code);
444 case OFPUTIL_OFPAT10_SET_TP_SRC:
445 case OFPUTIL_OFPAT11_SET_TP_SRC:
446 ofpact_put_SET_L4_SRC_PORT(ofpacts)->port = str_to_u32(arg);
449 case OFPUTIL_OFPAT10_SET_TP_DST:
450 case OFPUTIL_OFPAT11_SET_TP_DST:
451 ofpact_put_SET_L4_DST_PORT(ofpacts)->port = str_to_u32(arg);
454 case OFPUTIL_OFPAT10_ENQUEUE:
455 parse_enqueue(arg, ofpacts);
458 case OFPUTIL_NXAST_RESUBMIT:
459 parse_resubmit(arg, ofpacts);
462 case OFPUTIL_NXAST_SET_TUNNEL:
463 case OFPUTIL_NXAST_SET_TUNNEL64:
464 tunnel = ofpact_put_SET_TUNNEL(ofpacts);
465 tunnel->ofpact.compat = code;
466 tunnel->tun_id = str_to_u64(arg);
469 case OFPUTIL_NXAST_SET_QUEUE:
470 ofpact_put_SET_QUEUE(ofpacts)->queue_id = str_to_u32(arg);
473 case OFPUTIL_NXAST_POP_QUEUE:
474 ofpact_put_POP_QUEUE(ofpacts);
477 case OFPUTIL_NXAST_REG_MOVE:
478 nxm_parse_reg_move(ofpact_put_REG_MOVE(ofpacts), arg);
481 case OFPUTIL_NXAST_REG_LOAD:
482 nxm_parse_reg_load(ofpact_put_REG_LOAD(ofpacts), arg);
485 case OFPUTIL_NXAST_NOTE:
486 parse_note(arg, ofpacts);
489 case OFPUTIL_NXAST_MULTIPATH:
490 multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg);
493 case OFPUTIL_NXAST_AUTOPATH__DEPRECATED:
494 autopath_parse(ofpact_put_AUTOPATH(ofpacts), arg);
497 case OFPUTIL_NXAST_BUNDLE:
498 bundle_parse(arg, ofpacts);
501 case OFPUTIL_NXAST_BUNDLE_LOAD:
502 bundle_parse_load(arg, ofpacts);
505 case OFPUTIL_NXAST_RESUBMIT_TABLE:
506 case OFPUTIL_NXAST_OUTPUT_REG:
507 case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
510 case OFPUTIL_NXAST_LEARN:
511 learn_parse(arg, flow, ofpacts);
514 case OFPUTIL_NXAST_EXIT:
515 ofpact_put_EXIT(ofpacts);
518 case OFPUTIL_NXAST_DEC_TTL:
519 parse_dec_ttl(ofpacts, arg, code);
522 case OFPUTIL_NXAST_FIN_TIMEOUT:
523 parse_fin_timeout(ofpacts, arg);
526 case OFPUTIL_NXAST_CONTROLLER:
527 parse_controller(ofpacts, arg);
533 str_to_ofpact__(const struct flow *flow, char *pos, char *act, char *arg,
534 struct ofpbuf *ofpacts, int n_actions)
536 int code = ofputil_action_code_from_name(act);
538 parse_named_action(code, flow, arg, ofpacts);
539 } else if (!strcasecmp(act, "drop")) {
541 ovs_fatal(0, "Drop actions must not be preceded by other "
543 } else if (ofputil_parse_key_value(&pos, &act, &arg)) {
544 ovs_fatal(0, "Drop actions must not be followed by other "
550 if (ofputil_port_from_string(act, &port)) {
551 ofpact_put_OUTPUT(ofpacts)->port = port;
553 ovs_fatal(0, "Unknown action: %s", act);
561 str_to_ofpacts(const struct flow *flow, char *str, struct ofpbuf *ofpacts)
563 char *pos, *act, *arg;
568 while (ofputil_parse_key_value(&pos, &act, &arg)) {
569 if (!str_to_ofpact__(flow, pos, act, arg, ofpacts, n_actions)) {
578 parse_named_instruction(enum ovs_instruction_type type,
579 char *arg, struct ofpbuf *ofpacts)
582 case OVSINST_OFPIT11_APPLY_ACTIONS:
583 NOT_REACHED(); /* This case is handled by str_to_inst_ofpacts() */
586 case OVSINST_OFPIT11_WRITE_ACTIONS:
588 ovs_fatal(0, "instruction write-actions is not supported yet");
591 case OVSINST_OFPIT11_CLEAR_ACTIONS:
592 ofpact_put_CLEAR_ACTIONS(ofpacts);
595 case OVSINST_OFPIT11_WRITE_METADATA:
597 ovs_fatal(0, "instruction write-metadata is not supported yet");
600 case OVSINST_OFPIT11_GOTO_TABLE: {
601 struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts);
602 char *table_s = strsep(&arg, ",");
603 if (!table_s || !table_s[0]) {
604 ovs_fatal(0, "instruction goto-table needs table id");
606 ogt->table_id = str_to_table_id(table_s);
613 str_to_inst_ofpacts(const struct flow *flow, char *str, struct ofpbuf *ofpacts)
615 char *pos, *inst, *arg;
617 const char *prev_inst = NULL;
622 while (ofputil_parse_key_value(&pos, &inst, &arg)) {
623 type = ofpact_instruction_type_from_name(inst);
625 if (!str_to_ofpact__(flow, pos, inst, arg, ofpacts, n_actions)) {
629 type = OVSINST_OFPIT11_APPLY_ACTIONS;
630 if (prev_type == type) {
634 } else if (type == OVSINST_OFPIT11_APPLY_ACTIONS) {
635 ovs_fatal(0, "%s isn't supported. Just write actions then "
636 "it is interpreted as apply_actions", inst);
638 parse_named_instruction(type, arg, ofpacts);
641 if (type == prev_type) {
642 ovs_fatal(0, "instruction can be specified at most once: %s",
645 if (type <= prev_type) {
646 ovs_fatal(0, "Instruction %s must be specified before %s",
664 parse_protocol(const char *name, const struct protocol **p_out)
666 static const struct protocol protocols[] = {
667 { "ip", ETH_TYPE_IP, 0 },
668 { "arp", ETH_TYPE_ARP, 0 },
669 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
670 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
671 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
672 { "ipv6", ETH_TYPE_IPV6, 0 },
673 { "ip6", ETH_TYPE_IPV6, 0 },
674 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
675 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
676 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
678 const struct protocol *p;
680 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
681 if (!strcmp(p->name, name)) {
691 ofp_fatal(const char *flow, bool verbose, const char *format, ...)
696 fprintf(stderr, "%s:\n", flow);
699 va_start(args, format);
700 ovs_fatal_valist(0, format, args);
704 parse_field(const struct mf_field *mf, const char *s, struct match *match)
706 union mf_value value, mask;
709 error = mf_parse(mf, s, &value, &mask);
711 ovs_fatal(0, "%s", error);
714 mf_set(mf, &value, &mask, match);
717 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
718 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
719 * If 'actions' is specified, an action must be in 'string' and may be expanded
722 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
723 * constant for 'command'. To parse syntax for an OFPST_FLOW or
724 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'. */
726 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
736 char *string = xstrdup(str_);
737 char *save_ptr = NULL;
738 char *act_str = NULL;
747 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
754 case OFPFC_DELETE_STRICT:
755 fields = F_OUT_PORT | F_PRIORITY;
759 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
762 case OFPFC_MODIFY_STRICT:
763 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
770 match_init_catchall(&fm->match);
771 fm->priority = OFP_DEFAULT_PRIORITY;
772 fm->cookie = htonll(0);
773 fm->cookie_mask = htonll(0);
774 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
775 /* For modify, by default, don't update the cookie. */
776 fm->new_cookie = htonll(UINT64_MAX);
778 fm->new_cookie = htonll(0);
781 fm->command = command;
782 fm->idle_timeout = OFP_FLOW_PERMANENT;
783 fm->hard_timeout = OFP_FLOW_PERMANENT;
784 fm->buffer_id = UINT32_MAX;
785 fm->out_port = OFPP_NONE;
787 if (fields & F_ACTIONS) {
788 act_str = strstr(string, "action");
790 ofp_fatal(str_, verbose, "must specify an action");
794 act_str = strchr(act_str + 1, '=');
796 ofp_fatal(str_, verbose, "must specify an action");
801 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
802 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
803 const struct protocol *p;
805 if (parse_protocol(name, &p)) {
806 match_set_dl_type(&fm->match, htons(p->dl_type));
808 match_set_nw_proto(&fm->match, p->nw_proto);
810 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
811 fm->flags |= OFPFF_SEND_FLOW_REM;
812 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
813 fm->flags |= OFPFF_CHECK_OVERLAP;
817 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
819 ofp_fatal(str_, verbose, "field %s missing value", name);
822 if (!strcmp(name, "table")) {
823 fm->table_id = str_to_table_id(value);
824 } else if (!strcmp(name, "out_port")) {
825 if (!ofputil_port_from_string(name, &fm->out_port)) {
826 ofp_fatal(str_, verbose, "%s is not a valid OpenFlow port",
829 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
830 fm->priority = str_to_u16(value, name);
831 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
832 fm->idle_timeout = str_to_u16(value, name);
833 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
834 fm->hard_timeout = str_to_u16(value, name);
835 } else if (!strcmp(name, "cookie")) {
836 char *mask = strchr(value, '/');
839 /* A mask means we're searching for a cookie. */
840 if (command == OFPFC_ADD) {
841 ofp_fatal(str_, verbose, "flow additions cannot use "
845 fm->cookie = htonll(str_to_u64(value));
846 fm->cookie_mask = htonll(str_to_u64(mask+1));
848 /* No mask means that the cookie is being set. */
849 if (command != OFPFC_ADD && command != OFPFC_MODIFY
850 && command != OFPFC_MODIFY_STRICT) {
851 ofp_fatal(str_, verbose, "cannot set cookie");
853 fm->new_cookie = htonll(str_to_u64(value));
855 } else if (mf_from_name(name)) {
856 parse_field(mf_from_name(name), value, &fm->match);
857 } else if (!strcmp(name, "duration")
858 || !strcmp(name, "n_packets")
859 || !strcmp(name, "n_bytes")) {
860 /* Ignore these, so that users can feed the output of
861 * "ovs-ofctl dump-flows" back into commands that parse
864 ofp_fatal(str_, verbose, "unknown keyword %s", name);
868 if (!fm->cookie_mask && fm->new_cookie == htonll(UINT64_MAX)
869 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
870 /* On modifies without a mask, we are supposed to add a flow if
871 * one does not exist. If a cookie wasn't been specified, use a
872 * default of zero. */
873 fm->new_cookie = htonll(0);
875 if (fields & F_ACTIONS) {
876 struct ofpbuf ofpacts;
878 ofpbuf_init(&ofpacts, 32);
879 str_to_inst_ofpacts(&fm->match.flow, act_str, &ofpacts);
880 fm->ofpacts_len = ofpacts.size;
881 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
890 /* Convert 'str_' (as described in the documentation for the "monitor" command
891 * in the ovs-ofctl man page) into 'fmr'. */
893 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
898 char *string = xstrdup(str_);
899 char *save_ptr = NULL;
903 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
904 | NXFMF_OWN | NXFMF_ACTIONS);
905 fmr->out_port = OFPP_NONE;
906 fmr->table_id = 0xff;
907 match_init_catchall(&fmr->match);
909 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
910 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
911 const struct protocol *p;
913 if (!strcmp(name, "!initial")) {
914 fmr->flags &= ~NXFMF_INITIAL;
915 } else if (!strcmp(name, "!add")) {
916 fmr->flags &= ~NXFMF_ADD;
917 } else if (!strcmp(name, "!delete")) {
918 fmr->flags &= ~NXFMF_DELETE;
919 } else if (!strcmp(name, "!modify")) {
920 fmr->flags &= ~NXFMF_MODIFY;
921 } else if (!strcmp(name, "!actions")) {
922 fmr->flags &= ~NXFMF_ACTIONS;
923 } else if (!strcmp(name, "!own")) {
924 fmr->flags &= ~NXFMF_OWN;
925 } else if (parse_protocol(name, &p)) {
926 match_set_dl_type(&fmr->match, htons(p->dl_type));
928 match_set_nw_proto(&fmr->match, p->nw_proto);
933 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
935 ovs_fatal(0, "%s: field %s missing value", str_, name);
938 if (!strcmp(name, "table")) {
939 fmr->table_id = str_to_table_id(value);
940 } else if (!strcmp(name, "out_port")) {
941 fmr->out_port = atoi(value);
942 } else if (mf_from_name(name)) {
943 parse_field(mf_from_name(name), value, &fmr->match);
945 ovs_fatal(0, "%s: unknown keyword %s", str_, name);
952 /* Parses 's' as a set of OpenFlow actions and appends the actions to
955 * Prints an error on stderr and aborts the program if 's' syntax is
958 parse_ofpacts(const char *s_, struct ofpbuf *ofpacts)
960 char *s = xstrdup(s_);
961 str_to_ofpacts(NULL, s, ofpacts);
965 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
966 * (one of OFPFC_*) into 'fm'. */
968 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
969 uint16_t command, bool verbose)
971 struct match match_copy;
973 parse_ofp_str(fm, command, string, verbose);
975 /* Normalize a copy of the match. This ensures that non-normalized flows
976 * get logged but doesn't affect what gets sent to the switch, so that the
977 * switch can do whatever it likes with the flow. */
978 match_copy = fm->match;
979 ofputil_normalize_match(&match_copy);
983 parse_ofp_flow_mod_file(const char *file_name, uint16_t command,
984 struct ofputil_flow_mod **fms, size_t *n_fms)
986 size_t allocated_fms;
990 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
991 if (stream == NULL) {
992 ovs_fatal(errno, "%s: open", file_name);
995 allocated_fms = *n_fms;
997 while (!ds_get_preprocessed_line(&s, stream)) {
998 if (*n_fms >= allocated_fms) {
999 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
1001 parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command, false);
1006 if (stream != stdin) {
1012 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1013 bool aggregate, const char *string)
1015 struct ofputil_flow_mod fm;
1017 parse_ofp_str(&fm, -1, string, false);
1018 fsr->aggregate = aggregate;
1019 fsr->cookie = fm.cookie;
1020 fsr->cookie_mask = fm.cookie_mask;
1021 fsr->match = fm.match;
1022 fsr->out_port = fm.out_port;
1023 fsr->table_id = fm.table_id;
1026 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1027 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1028 * mf_field. Fields must be specified in a natural order for satisfying
1031 * Returns NULL on success, otherwise a malloc()'d string that explains the
1034 parse_ofp_exact_flow(struct flow *flow, const char *s)
1036 char *pos, *key, *value_s;
1040 memset(flow, 0, sizeof *flow);
1042 pos = copy = xstrdup(s);
1043 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
1044 const struct protocol *p;
1045 if (parse_protocol(key, &p)) {
1046 if (flow->dl_type) {
1047 error = xasprintf("%s: Ethernet type set multiple times", s);
1050 flow->dl_type = htons(p->dl_type);
1053 if (flow->nw_proto) {
1054 error = xasprintf("%s: network protocol set "
1055 "multiple times", s);
1058 flow->nw_proto = p->nw_proto;
1061 const struct mf_field *mf;
1062 union mf_value value;
1065 mf = mf_from_name(key);
1067 error = xasprintf("%s: unknown field %s", s, key);
1071 if (!mf_are_prereqs_ok(mf, flow)) {
1072 error = xasprintf("%s: prerequisites not met for setting %s",
1077 if (!mf_is_zero(mf, flow)) {
1078 error = xasprintf("%s: field %s set multiple times", s, key);
1082 field_error = mf_parse_value(mf, value_s, &value);
1084 error = xasprintf("%s: bad value for %s (%s)",
1085 s, key, field_error);
1090 mf_set_flow_value(mf, &value, flow);
1098 memset(flow, 0, sizeof *flow);