2 * Copyright (c) 2010, 2011, 2012, 2013 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"
26 #include "byte-order.h"
27 #include "dynamic-string.h"
29 #include "meta-flow.h"
30 #include "multipath.h"
33 #include "ofp-actions.h"
36 #include "openflow/openflow.h"
38 #include "socket-util.h"
42 VLOG_DEFINE_THIS_MODULE(ofp_parse);
44 static void ofp_fatal(const char *flow, bool verbose, const char *format, ...)
48 str_to_u8(const char *str, const char *name)
52 if (!str_to_int(str, 10, &value) || value < 0 || value > 255) {
53 ovs_fatal(0, "invalid %s \"%s\"", name, str);
59 str_to_u16(const char *str, const char *name)
63 if (!str_to_int(str, 0, &value) || value < 0 || value > 65535) {
64 ovs_fatal(0, "invalid %s \"%s\"", name, str);
70 str_to_u32(const char *str)
76 ovs_fatal(0, "missing required numeric argument");
80 value = strtoul(str, &tail, 0);
81 if (errno == EINVAL || errno == ERANGE || *tail) {
82 ovs_fatal(0, "invalid numeric format %s", str);
88 str_to_u64(const char *str)
94 ovs_fatal(0, "missing required numeric argument");
98 value = strtoull(str, &tail, 0);
99 if (errno == EINVAL || errno == ERANGE || *tail) {
100 ovs_fatal(0, "invalid numeric format %s", str);
106 str_to_mac(const char *str, uint8_t mac[6])
108 if (sscanf(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
109 != ETH_ADDR_SCAN_COUNT) {
110 ovs_fatal(0, "invalid mac address %s", str);
115 str_to_ip(const char *str, ovs_be32 *ip)
117 struct in_addr in_addr;
119 if (lookup_ip(str, &in_addr)) {
120 ovs_fatal(0, "%s: could not convert to IP address", str);
122 *ip = in_addr.s_addr;
126 parse_enqueue(char *arg, struct ofpbuf *ofpacts)
129 char *port = strtok_r(arg, ":q", &sp);
130 char *queue = strtok_r(NULL, "", &sp);
131 struct ofpact_enqueue *enqueue;
133 if (port == NULL || queue == NULL) {
134 ovs_fatal(0, "\"enqueue\" syntax is \"enqueue:PORT:QUEUE\"");
137 enqueue = ofpact_put_ENQUEUE(ofpacts);
138 enqueue->port = u16_to_ofp(str_to_u32(port));
139 enqueue->queue = str_to_u32(queue);
143 parse_output(char *arg, struct ofpbuf *ofpacts)
145 if (strchr(arg, '[')) {
146 struct ofpact_output_reg *output_reg;
148 output_reg = ofpact_put_OUTPUT_REG(ofpacts);
149 mf_parse_subfield(&output_reg->src, arg);
150 output_reg->max_len = UINT16_MAX;
152 struct ofpact_output *output;
154 output = ofpact_put_OUTPUT(ofpacts);
155 output->port = u16_to_ofp(str_to_u32(arg));
156 output->max_len = output->port == OFPP_CONTROLLER ? UINT16_MAX : 0;
161 parse_resubmit(char *arg, struct ofpbuf *ofpacts)
163 struct ofpact_resubmit *resubmit;
164 char *in_port_s, *table_s;
166 resubmit = ofpact_put_RESUBMIT(ofpacts);
168 in_port_s = strsep(&arg, ",");
169 if (in_port_s && in_port_s[0]) {
170 if (!ofputil_port_from_string(in_port_s, &resubmit->in_port)) {
171 ovs_fatal(0, "%s: resubmit to unknown port", in_port_s);
174 resubmit->in_port = OFPP_IN_PORT;
177 table_s = strsep(&arg, ",");
178 resubmit->table_id = table_s && table_s[0] ? str_to_u32(table_s) : 255;
180 if (resubmit->in_port == OFPP_IN_PORT && resubmit->table_id == 255) {
181 ovs_fatal(0, "at least one \"in_port\" or \"table\" must be specified "
187 parse_note(const char *arg, struct ofpbuf *ofpacts)
189 struct ofpact_note *note;
191 note = ofpact_put_NOTE(ofpacts);
192 while (*arg != '\0') {
203 byte = hexits_value(arg, 2, &ok);
205 ovs_fatal(0, "bad hex digit in `note' argument");
207 ofpbuf_put(ofpacts, &byte, 1);
214 ofpact_update_len(ofpacts, ¬e->ofpact);
218 parse_fin_timeout(struct ofpbuf *b, char *arg)
220 struct ofpact_fin_timeout *oft = ofpact_put_FIN_TIMEOUT(b);
223 while (ofputil_parse_key_value(&arg, &key, &value)) {
224 if (!strcmp(key, "idle_timeout")) {
225 oft->fin_idle_timeout = str_to_u16(value, key);
226 } else if (!strcmp(key, "hard_timeout")) {
227 oft->fin_hard_timeout = str_to_u16(value, key);
229 ovs_fatal(0, "invalid key '%s' in 'fin_timeout' argument", key);
235 parse_controller(struct ofpbuf *b, char *arg)
237 enum ofp_packet_in_reason reason = OFPR_ACTION;
238 uint16_t controller_id = 0;
239 uint16_t max_len = UINT16_MAX;
243 } else if (strspn(arg, "0123456789") == strlen(arg)) {
244 max_len = str_to_u16(arg, "max_len");
248 while (ofputil_parse_key_value(&arg, &name, &value)) {
249 if (!strcmp(name, "reason")) {
250 if (!ofputil_packet_in_reason_from_string(value, &reason)) {
251 ovs_fatal(0, "unknown reason \"%s\"", value);
253 } else if (!strcmp(name, "max_len")) {
254 max_len = str_to_u16(value, "max_len");
255 } else if (!strcmp(name, "id")) {
256 controller_id = str_to_u16(value, "id");
258 ovs_fatal(0, "unknown key \"%s\" parsing controller action",
264 if (reason == OFPR_ACTION && controller_id == 0) {
265 struct ofpact_output *output;
267 output = ofpact_put_OUTPUT(b);
268 output->port = OFPP_CONTROLLER;
269 output->max_len = max_len;
271 struct ofpact_controller *controller;
273 controller = ofpact_put_CONTROLLER(b);
274 controller->max_len = max_len;
275 controller->reason = reason;
276 controller->controller_id = controller_id;
281 parse_noargs_dec_ttl(struct ofpbuf *b)
283 struct ofpact_cnt_ids *ids;
286 ids = ofpact_put_DEC_TTL(b);
287 ofpbuf_put(b, &id, sizeof id);
289 ids->n_controllers++;
290 ofpact_update_len(b, &ids->ofpact);
294 parse_dec_ttl(struct ofpbuf *b, char *arg)
297 parse_noargs_dec_ttl(b);
299 struct ofpact_cnt_ids *ids;
302 ids = ofpact_put_DEC_TTL(b);
303 ids->ofpact.compat = OFPUTIL_NXAST_DEC_TTL_CNT_IDS;
304 for (cntr = strtok_r(arg, ", ", &arg); cntr != NULL;
305 cntr = strtok_r(NULL, ", ", &arg)) {
306 uint16_t id = atoi(cntr);
308 ofpbuf_put(b, &id, sizeof id);
310 ids->n_controllers++;
312 if (!ids->n_controllers) {
313 ovs_fatal(0, "dec_ttl_cnt_ids: expected at least one controller "
316 ofpact_update_len(b, &ids->ofpact);
321 parse_set_mpls_ttl(struct ofpbuf *b, const char *arg)
323 struct ofpact_mpls_ttl *mpls_ttl = ofpact_put_SET_MPLS_TTL(b);
326 ovs_fatal(0, "parse_set_mpls_ttl: expected ttl.");
329 mpls_ttl->ttl = atoi(arg);
333 set_field_parse(const char *arg, struct ofpbuf *ofpacts)
335 char *orig = xstrdup(arg);
336 struct ofpact_reg_load *load = ofpact_put_REG_LOAD(ofpacts);
340 const struct mf_field *mf;
342 union mf_value mf_value;
345 delim = strstr(orig, "->");
347 ovs_fatal(0, "%s: missing `->'", orig);
349 if (strlen(delim) <= strlen("->")) {
350 ovs_fatal(0, "%s: missing field name following `->'", orig);
353 key = delim + strlen("->");
354 mf = mf_from_name(key);
356 ovs_fatal(0, "%s is not valid oxm field name", key);
359 ovs_fatal(0, "%s is not allowed to set", key);
363 error = mf_parse_value(mf, value, &mf_value);
365 ovs_fatal(0, "%s", error);
367 if (!mf_is_value_valid(mf, &mf_value)) {
368 ovs_fatal(0, "%s is not valid valid for field %s", value, key);
370 ofpact_set_field_init(load, mf, &mf_value);
375 parse_metadata(struct ofpbuf *b, char *arg)
377 struct ofpact_metadata *om;
378 char *mask = strchr(arg, '/');
380 om = ofpact_put_WRITE_METADATA(b);
384 om->mask = htonll(str_to_u64(mask + 1));
386 om->mask = htonll(UINT64_MAX);
389 om->metadata = htonll(str_to_u64(arg));
393 parse_sample(struct ofpbuf *b, char *arg)
395 struct ofpact_sample *os = ofpact_put_SAMPLE(b);
398 while (ofputil_parse_key_value(&arg, &key, &value)) {
399 if (!strcmp(key, "probability")) {
400 os->probability = str_to_u16(value, "probability");
401 if (os->probability == 0) {
402 ovs_fatal(0, "invalid probability value \"%s\"", value);
404 } else if (!strcmp(key, "collector_set_id")) {
405 os->collector_set_id = str_to_u32(value);
406 } else if (!strcmp(key, "obs_domain_id")) {
407 os->obs_domain_id = str_to_u32(value);
408 } else if (!strcmp(key, "obs_point_id")) {
409 os->obs_point_id = str_to_u32(value);
411 ovs_fatal(0, "invalid key \"%s\" in \"sample\" argument",
415 if (os->probability == 0) {
416 ovs_fatal(0, "non-zero \"probability\" must be specified on sample");
421 parse_named_action(enum ofputil_action_code code,
422 char *arg, struct ofpbuf *ofpacts)
424 struct ofpact_tunnel *tunnel;
432 case OFPUTIL_ACTION_INVALID:
435 case OFPUTIL_OFPAT10_OUTPUT:
436 case OFPUTIL_OFPAT11_OUTPUT:
437 parse_output(arg, ofpacts);
440 case OFPUTIL_OFPAT10_SET_VLAN_VID:
441 case OFPUTIL_OFPAT11_SET_VLAN_VID:
442 vid = str_to_u32(arg);
443 if (vid & ~VLAN_VID_MASK) {
444 ovs_fatal(0, "%s: not a valid VLAN VID", arg);
446 ofpact_put_SET_VLAN_VID(ofpacts)->vlan_vid = vid;
449 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
450 case OFPUTIL_OFPAT11_SET_VLAN_PCP:
451 pcp = str_to_u32(arg);
453 ovs_fatal(0, "%s: not a valid VLAN PCP", arg);
455 ofpact_put_SET_VLAN_PCP(ofpacts)->vlan_pcp = pcp;
458 case OFPUTIL_OFPAT12_SET_FIELD:
459 set_field_parse(arg, ofpacts);
462 case OFPUTIL_OFPAT10_STRIP_VLAN:
463 case OFPUTIL_OFPAT11_POP_VLAN:
464 ofpact_put_STRIP_VLAN(ofpacts);
467 case OFPUTIL_OFPAT11_PUSH_VLAN:
468 ethertype = str_to_u16(arg, "ethertype");
469 if (ethertype != ETH_TYPE_VLAN_8021Q) {
470 /* XXX ETH_TYPE_VLAN_8021AD case isn't supported */
471 ovs_fatal(0, "%s: not a valid VLAN ethertype", arg);
473 ofpact_put_PUSH_VLAN(ofpacts);
476 case OFPUTIL_OFPAT11_SET_QUEUE:
477 ofpact_put_SET_QUEUE(ofpacts)->queue_id = str_to_u32(arg);
481 case OFPUTIL_OFPAT10_SET_DL_SRC:
482 case OFPUTIL_OFPAT11_SET_DL_SRC:
483 str_to_mac(arg, ofpact_put_SET_ETH_SRC(ofpacts)->mac);
486 case OFPUTIL_OFPAT10_SET_DL_DST:
487 case OFPUTIL_OFPAT11_SET_DL_DST:
488 str_to_mac(arg, ofpact_put_SET_ETH_DST(ofpacts)->mac);
491 case OFPUTIL_OFPAT10_SET_NW_SRC:
492 case OFPUTIL_OFPAT11_SET_NW_SRC:
494 ofpact_put_SET_IPV4_SRC(ofpacts)->ipv4 = ip;
497 case OFPUTIL_OFPAT10_SET_NW_DST:
498 case OFPUTIL_OFPAT11_SET_NW_DST:
500 ofpact_put_SET_IPV4_DST(ofpacts)->ipv4 = ip;
503 case OFPUTIL_OFPAT10_SET_NW_TOS:
504 case OFPUTIL_OFPAT11_SET_NW_TOS:
505 tos = str_to_u32(arg);
506 if (tos & ~IP_DSCP_MASK) {
507 ovs_fatal(0, "%s: not a valid TOS", arg);
509 ofpact_put_SET_IPV4_DSCP(ofpacts)->dscp = tos;
512 case OFPUTIL_OFPAT11_DEC_NW_TTL:
515 case OFPUTIL_OFPAT10_SET_TP_SRC:
516 case OFPUTIL_OFPAT11_SET_TP_SRC:
517 ofpact_put_SET_L4_SRC_PORT(ofpacts)->port = str_to_u32(arg);
520 case OFPUTIL_OFPAT10_SET_TP_DST:
521 case OFPUTIL_OFPAT11_SET_TP_DST:
522 ofpact_put_SET_L4_DST_PORT(ofpacts)->port = str_to_u32(arg);
525 case OFPUTIL_OFPAT10_ENQUEUE:
526 parse_enqueue(arg, ofpacts);
529 case OFPUTIL_NXAST_RESUBMIT:
530 parse_resubmit(arg, ofpacts);
533 case OFPUTIL_NXAST_SET_TUNNEL:
534 case OFPUTIL_NXAST_SET_TUNNEL64:
535 tunnel = ofpact_put_SET_TUNNEL(ofpacts);
536 tunnel->ofpact.compat = code;
537 tunnel->tun_id = str_to_u64(arg);
540 case OFPUTIL_NXAST_WRITE_METADATA:
541 parse_metadata(ofpacts, arg);
544 case OFPUTIL_NXAST_SET_QUEUE:
545 ofpact_put_SET_QUEUE(ofpacts)->queue_id = str_to_u32(arg);
548 case OFPUTIL_NXAST_POP_QUEUE:
549 ofpact_put_POP_QUEUE(ofpacts);
552 case OFPUTIL_NXAST_REG_MOVE:
553 nxm_parse_reg_move(ofpact_put_REG_MOVE(ofpacts), arg);
556 case OFPUTIL_NXAST_REG_LOAD:
557 nxm_parse_reg_load(ofpact_put_REG_LOAD(ofpacts), arg);
560 case OFPUTIL_NXAST_NOTE:
561 parse_note(arg, ofpacts);
564 case OFPUTIL_NXAST_MULTIPATH:
565 multipath_parse(ofpact_put_MULTIPATH(ofpacts), arg);
568 case OFPUTIL_NXAST_BUNDLE:
569 bundle_parse(arg, ofpacts);
572 case OFPUTIL_NXAST_BUNDLE_LOAD:
573 bundle_parse_load(arg, ofpacts);
576 case OFPUTIL_NXAST_RESUBMIT_TABLE:
577 case OFPUTIL_NXAST_OUTPUT_REG:
578 case OFPUTIL_NXAST_DEC_TTL_CNT_IDS:
581 case OFPUTIL_NXAST_LEARN:
582 learn_parse(arg, ofpacts);
585 case OFPUTIL_NXAST_EXIT:
586 ofpact_put_EXIT(ofpacts);
589 case OFPUTIL_NXAST_DEC_TTL:
590 parse_dec_ttl(ofpacts, arg);
593 case OFPUTIL_NXAST_SET_MPLS_TTL:
594 case OFPUTIL_OFPAT11_SET_MPLS_TTL:
595 parse_set_mpls_ttl(ofpacts, arg);
598 case OFPUTIL_OFPAT11_DEC_MPLS_TTL:
599 case OFPUTIL_NXAST_DEC_MPLS_TTL:
600 ofpact_put_DEC_MPLS_TTL(ofpacts);
603 case OFPUTIL_NXAST_FIN_TIMEOUT:
604 parse_fin_timeout(ofpacts, arg);
607 case OFPUTIL_NXAST_CONTROLLER:
608 parse_controller(ofpacts, arg);
611 case OFPUTIL_OFPAT11_PUSH_MPLS:
612 case OFPUTIL_NXAST_PUSH_MPLS:
613 ofpact_put_PUSH_MPLS(ofpacts)->ethertype =
614 htons(str_to_u16(arg, "push_mpls"));
617 case OFPUTIL_OFPAT11_POP_MPLS:
618 case OFPUTIL_NXAST_POP_MPLS:
619 ofpact_put_POP_MPLS(ofpacts)->ethertype =
620 htons(str_to_u16(arg, "pop_mpls"));
623 case OFPUTIL_NXAST_STACK_PUSH:
624 nxm_parse_stack_action(ofpact_put_STACK_PUSH(ofpacts), arg);
626 case OFPUTIL_NXAST_STACK_POP:
627 nxm_parse_stack_action(ofpact_put_STACK_POP(ofpacts), arg);
630 case OFPUTIL_NXAST_SAMPLE:
631 parse_sample(ofpacts, arg);
637 str_to_ofpact__(char *pos, char *act, char *arg,
638 struct ofpbuf *ofpacts, int n_actions)
640 int code = ofputil_action_code_from_name(act);
642 parse_named_action(code, arg, ofpacts);
643 } else if (!strcasecmp(act, "drop")) {
645 ovs_fatal(0, "Drop actions must not be preceded by other "
647 } else if (ofputil_parse_key_value(&pos, &act, &arg)) {
648 ovs_fatal(0, "Drop actions must not be followed by other "
654 if (ofputil_port_from_string(act, &port)) {
655 ofpact_put_OUTPUT(ofpacts)->port = port;
657 ovs_fatal(0, "Unknown action: %s", act);
665 str_to_ofpacts(char *str, struct ofpbuf *ofpacts)
667 char *pos, *act, *arg;
673 while (ofputil_parse_key_value(&pos, &act, &arg)) {
674 if (!str_to_ofpact__(pos, act, arg, ofpacts, n_actions)) {
680 error = ofpacts_verify(ofpacts->data, ofpacts->size);
682 ovs_fatal(0, "Incorrect action ordering");
689 parse_named_instruction(enum ovs_instruction_type type,
690 char *arg, struct ofpbuf *ofpacts)
695 case OVSINST_OFPIT11_APPLY_ACTIONS:
696 NOT_REACHED(); /* This case is handled by str_to_inst_ofpacts() */
699 case OVSINST_OFPIT11_WRITE_ACTIONS:
701 ovs_fatal(0, "instruction write-actions is not supported yet");
704 case OVSINST_OFPIT11_CLEAR_ACTIONS:
705 ofpact_put_CLEAR_ACTIONS(ofpacts);
708 case OVSINST_OFPIT13_METER:
709 ofpact_put_METER(ofpacts)->meter_id = str_to_u32(arg);
712 case OVSINST_OFPIT11_WRITE_METADATA:
713 parse_metadata(ofpacts, arg);
716 case OVSINST_OFPIT11_GOTO_TABLE: {
717 struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts);
718 char *table_s = strsep(&arg, ",");
719 if (!table_s || !table_s[0]) {
720 ovs_fatal(0, "instruction goto-table needs table id");
722 ogt->table_id = str_to_u8(table_s, "table");
727 /* If write_metadata is specified as an action AND an instruction, ofpacts
729 error = ofpacts_verify(ofpacts->data, ofpacts->size);
731 ovs_fatal(0, "Incorrect instruction ordering");
736 str_to_inst_ofpacts(char *str, struct ofpbuf *ofpacts)
738 char *pos, *inst, *arg;
740 const char *prev_inst = NULL;
745 while (ofputil_parse_key_value(&pos, &inst, &arg)) {
746 type = ovs_instruction_type_from_name(inst);
748 if (!str_to_ofpact__(pos, inst, arg, ofpacts, n_actions)) {
752 type = OVSINST_OFPIT11_APPLY_ACTIONS;
753 if (prev_type == type) {
757 } else if (type == OVSINST_OFPIT11_APPLY_ACTIONS) {
758 ovs_fatal(0, "%s isn't supported. Just write actions then "
759 "it is interpreted as apply_actions", inst);
761 parse_named_instruction(type, arg, ofpacts);
764 if (type == prev_type) {
765 ovs_fatal(0, "instruction can be specified at most once: %s",
768 if (type <= prev_type) {
769 ovs_fatal(0, "Instruction %s must be specified before %s",
787 parse_protocol(const char *name, const struct protocol **p_out)
789 static const struct protocol protocols[] = {
790 { "ip", ETH_TYPE_IP, 0 },
791 { "arp", ETH_TYPE_ARP, 0 },
792 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
793 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
794 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
795 { "ipv6", ETH_TYPE_IPV6, 0 },
796 { "ip6", ETH_TYPE_IPV6, 0 },
797 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
798 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
799 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
800 { "rarp", ETH_TYPE_RARP, 0},
801 { "mpls", ETH_TYPE_MPLS, 0 },
802 { "mplsm", ETH_TYPE_MPLS_MCAST, 0 },
804 const struct protocol *p;
806 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
807 if (!strcmp(p->name, name)) {
817 ofp_fatal(const char *flow, bool verbose, const char *format, ...)
822 fprintf(stderr, "%s:\n", flow);
825 va_start(args, format);
826 ovs_fatal_valist(0, format, args);
830 parse_field(const struct mf_field *mf, const char *s, struct match *match)
832 union mf_value value, mask;
835 error = mf_parse(mf, s, &value, &mask);
837 ovs_fatal(0, "%s", error);
840 mf_set(mf, &value, &mask, match);
843 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
844 * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
845 * If 'actions' is specified, an action must be in 'string' and may be expanded
848 * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
849 * constant for 'command'. To parse syntax for an OFPST_FLOW or
850 * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'. */
852 parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
862 char *string = xstrdup(str_);
863 char *save_ptr = NULL;
864 char *act_str = NULL;
873 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
880 case OFPFC_DELETE_STRICT:
881 fields = F_OUT_PORT | F_PRIORITY;
885 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
888 case OFPFC_MODIFY_STRICT:
889 fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
896 match_init_catchall(&fm->match);
897 fm->priority = OFP_DEFAULT_PRIORITY;
898 fm->cookie = htonll(0);
899 fm->cookie_mask = htonll(0);
900 if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
901 /* For modify, by default, don't update the cookie. */
902 fm->new_cookie = htonll(UINT64_MAX);
904 fm->new_cookie = htonll(0);
907 fm->command = command;
908 fm->idle_timeout = OFP_FLOW_PERMANENT;
909 fm->hard_timeout = OFP_FLOW_PERMANENT;
910 fm->buffer_id = UINT32_MAX;
911 fm->out_port = OFPP_ANY;
913 if (fields & F_ACTIONS) {
914 act_str = strstr(string, "action");
916 ofp_fatal(str_, verbose, "must specify an action");
920 act_str = strchr(act_str + 1, '=');
922 ofp_fatal(str_, verbose, "must specify an action");
927 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
928 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
929 const struct protocol *p;
931 if (parse_protocol(name, &p)) {
932 match_set_dl_type(&fm->match, htons(p->dl_type));
934 match_set_nw_proto(&fm->match, p->nw_proto);
936 } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
937 fm->flags |= OFPFF_SEND_FLOW_REM;
938 } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
939 fm->flags |= OFPFF_CHECK_OVERLAP;
940 } else if (fields & F_FLAGS && !strcmp(name, "reset_counts")) {
941 fm->flags |= OFPFF12_RESET_COUNTS;
942 } else if (fields & F_FLAGS && !strcmp(name, "no_packet_counts")) {
943 fm->flags |= OFPFF13_NO_PKT_COUNTS;
944 } else if (fields & F_FLAGS && !strcmp(name, "no_byte_counts")) {
945 fm->flags |= OFPFF13_NO_BYT_COUNTS;
949 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
951 ofp_fatal(str_, verbose, "field %s missing value", name);
954 if (!strcmp(name, "table")) {
955 fm->table_id = str_to_u8(value, name);
956 } else if (!strcmp(name, "out_port")) {
957 if (!ofputil_port_from_string(value, &fm->out_port)) {
958 ofp_fatal(str_, verbose, "%s is not a valid OpenFlow port",
961 } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
962 fm->priority = str_to_u16(value, name);
963 } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
964 fm->idle_timeout = str_to_u16(value, name);
965 } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
966 fm->hard_timeout = str_to_u16(value, name);
967 } else if (!strcmp(name, "cookie")) {
968 char *mask = strchr(value, '/');
971 /* A mask means we're searching for a cookie. */
972 if (command == OFPFC_ADD) {
973 ofp_fatal(str_, verbose, "flow additions cannot use "
977 fm->cookie = htonll(str_to_u64(value));
978 fm->cookie_mask = htonll(str_to_u64(mask+1));
980 /* No mask means that the cookie is being set. */
981 if (command != OFPFC_ADD && command != OFPFC_MODIFY
982 && command != OFPFC_MODIFY_STRICT) {
983 ofp_fatal(str_, verbose, "cannot set cookie");
985 fm->new_cookie = htonll(str_to_u64(value));
987 } else if (mf_from_name(name)) {
988 parse_field(mf_from_name(name), value, &fm->match);
989 } else if (!strcmp(name, "duration")
990 || !strcmp(name, "n_packets")
991 || !strcmp(name, "n_bytes")
992 || !strcmp(name, "idle_age")
993 || !strcmp(name, "hard_age")) {
994 /* Ignore these, so that users can feed the output of
995 * "ovs-ofctl dump-flows" back into commands that parse
998 ofp_fatal(str_, verbose, "unknown keyword %s", name);
1002 if (!fm->cookie_mask && fm->new_cookie == htonll(UINT64_MAX)
1003 && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
1004 /* On modifies without a mask, we are supposed to add a flow if
1005 * one does not exist. If a cookie wasn't been specified, use a
1006 * default of zero. */
1007 fm->new_cookie = htonll(0);
1009 if (fields & F_ACTIONS) {
1010 struct ofpbuf ofpacts;
1013 ofpbuf_init(&ofpacts, 32);
1014 str_to_inst_ofpacts(act_str, &ofpacts);
1015 fm->ofpacts_len = ofpacts.size;
1016 fm->ofpacts = ofpbuf_steal_data(&ofpacts);
1018 err = ofpacts_check(fm->ofpacts, fm->ofpacts_len, &fm->match.flow,
1025 fm->ofpacts_len = 0;
1032 /* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
1033 * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
1036 parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
1037 int command, bool verbose)
1044 char *string = xstrdup(str_);
1045 char *save_ptr = NULL;
1046 char *band_str = NULL;
1055 fields = F_METER | F_FLAGS | F_BANDS;
1058 case OFPMC13_DELETE:
1062 case OFPMC13_MODIFY:
1063 fields = F_METER | F_FLAGS | F_BANDS;
1070 mm->command = command;
1071 mm->meter.meter_id = 0;
1072 mm->meter.flags = 0;
1073 if (fields & F_BANDS) {
1074 band_str = strstr(string, "band");
1076 ofp_fatal(str_, verbose, "must specify bands");
1080 band_str = strchr(band_str + 1, '=');
1082 ofp_fatal(str_, verbose, "must specify bands");
1087 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1088 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1090 if (fields & F_FLAGS && !strcmp(name, "kbps")) {
1091 mm->meter.flags |= OFPMF13_KBPS;
1092 } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
1093 mm->meter.flags |= OFPMF13_PKTPS;
1094 } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
1095 mm->meter.flags |= OFPMF13_BURST;
1096 } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
1097 mm->meter.flags |= OFPMF13_STATS;
1101 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1103 ofp_fatal(str_, verbose, "field %s missing value", name);
1106 if (!strcmp(name, "meter")) {
1107 if (!strcmp(value, "all")) {
1108 mm->meter.meter_id = OFPM13_ALL;
1109 } else if (!strcmp(value, "controller")) {
1110 mm->meter.meter_id = OFPM13_CONTROLLER;
1111 } else if (!strcmp(value, "slowpath")) {
1112 mm->meter.meter_id = OFPM13_SLOWPATH;
1114 mm->meter.meter_id = str_to_u32(value);
1115 if (mm->meter.meter_id > OFPM13_MAX) {
1116 ofp_fatal(str_, verbose, "invalid value for %s", name);
1120 ofp_fatal(str_, verbose, "unknown keyword %s", name);
1124 if (fields & F_METER && !mm->meter.meter_id) {
1125 ofp_fatal(str_, verbose, "must specify 'meter'");
1127 if (fields & F_FLAGS && !mm->meter.flags) {
1128 ofp_fatal(str_, verbose,
1129 "meter must specify either 'kbps' or 'pktps'");
1132 if (fields & F_BANDS) {
1133 struct ofpbuf bands;
1134 uint16_t n_bands = 0;
1135 struct ofputil_meter_band *band = NULL;
1138 ofpbuf_init(&bands, 64);
1140 for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
1141 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1145 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1147 ofp_fatal(str_, verbose, "field %s missing value", name);
1150 if (!strcmp(name, "type")) {
1151 /* Start a new band */
1152 band = ofpbuf_put_zeros(&bands, sizeof *band);
1155 if (!strcmp(value, "drop")) {
1156 band->type = OFPMBT13_DROP;
1157 } else if (!strcmp(value, "dscp_remark")) {
1158 band->type = OFPMBT13_DSCP_REMARK;
1160 ofp_fatal(str_, verbose, "field %s unknown value %s", name,
1163 } else if (!band || !band->type) {
1164 ofp_fatal(str_, verbose,
1165 "band must start with the 'type' keyword");
1166 } else if (!strcmp(name, "rate")) {
1167 band->rate = str_to_u32(value);
1168 } else if (!strcmp(name, "burst_size")) {
1169 band->burst_size = str_to_u32(value);
1170 } else if (!strcmp(name, "prec_level")) {
1171 band->prec_level = str_to_u8(value, name);
1173 ofp_fatal(str_, verbose, "unknown keyword %s", name);
1176 /* validate bands */
1178 ofp_fatal(str_, verbose, "meter must have bands");
1181 mm->meter.n_bands = n_bands;
1182 mm->meter.bands = ofpbuf_steal_data(&bands);
1184 for (i = 0; i < n_bands; ++i) {
1185 band = &mm->meter.bands[i];
1188 ofp_fatal(str_, verbose, "band must have 'type'");
1190 if (band->type == OFPMBT13_DSCP_REMARK) {
1191 if (!band->prec_level) {
1192 ofp_fatal(str_, verbose, "'dscp_remark' band must have"
1196 if (band->prec_level) {
1197 ofp_fatal(str_, verbose, "Only 'dscp_remark' band may have"
1202 ofp_fatal(str_, verbose, "band must have 'rate'");
1204 if (mm->meter.flags & OFPMF13_BURST) {
1205 if (!band->burst_size) {
1206 ofp_fatal(str_, verbose, "band must have 'burst_size' "
1207 "when 'burst' flag is set");
1210 if (band->burst_size) {
1211 ofp_fatal(str_, verbose, "band may have 'burst_size' only "
1212 "when 'burst' flag is set");
1217 mm->meter.n_bands = 0;
1218 mm->meter.bands = NULL;
1224 /* Convert 'str_' (as described in the documentation for the "monitor" command
1225 * in the ovs-ofctl man page) into 'fmr'. */
1227 parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
1232 char *string = xstrdup(str_);
1233 char *save_ptr = NULL;
1237 fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
1238 | NXFMF_OWN | NXFMF_ACTIONS);
1239 fmr->out_port = OFPP_NONE;
1240 fmr->table_id = 0xff;
1241 match_init_catchall(&fmr->match);
1243 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
1244 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
1245 const struct protocol *p;
1247 if (!strcmp(name, "!initial")) {
1248 fmr->flags &= ~NXFMF_INITIAL;
1249 } else if (!strcmp(name, "!add")) {
1250 fmr->flags &= ~NXFMF_ADD;
1251 } else if (!strcmp(name, "!delete")) {
1252 fmr->flags &= ~NXFMF_DELETE;
1253 } else if (!strcmp(name, "!modify")) {
1254 fmr->flags &= ~NXFMF_MODIFY;
1255 } else if (!strcmp(name, "!actions")) {
1256 fmr->flags &= ~NXFMF_ACTIONS;
1257 } else if (!strcmp(name, "!own")) {
1258 fmr->flags &= ~NXFMF_OWN;
1259 } else if (parse_protocol(name, &p)) {
1260 match_set_dl_type(&fmr->match, htons(p->dl_type));
1262 match_set_nw_proto(&fmr->match, p->nw_proto);
1267 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
1269 ovs_fatal(0, "%s: field %s missing value", str_, name);
1272 if (!strcmp(name, "table")) {
1273 fmr->table_id = str_to_u8(value, name);
1274 } else if (!strcmp(name, "out_port")) {
1275 fmr->out_port = u16_to_ofp(atoi(value));
1276 } else if (mf_from_name(name)) {
1277 parse_field(mf_from_name(name), value, &fmr->match);
1279 ovs_fatal(0, "%s: unknown keyword %s", str_, name);
1286 /* Parses 's' as a set of OpenFlow actions and appends the actions to
1289 * Prints an error on stderr and aborts the program if 's' syntax is
1292 parse_ofpacts(const char *s_, struct ofpbuf *ofpacts)
1294 char *s = xstrdup(s_);
1295 str_to_ofpacts(s, ofpacts);
1299 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
1300 * (one of OFPFC_*) into 'fm'. */
1302 parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
1303 uint16_t command, bool verbose)
1305 struct match match_copy;
1307 parse_ofp_str(fm, command, string, verbose);
1309 /* Normalize a copy of the match. This ensures that non-normalized flows
1310 * get logged but doesn't affect what gets sent to the switch, so that the
1311 * switch can do whatever it likes with the flow. */
1312 match_copy = fm->match;
1313 ofputil_normalize_match(&match_copy);
1317 parse_ofp_flow_mod_file(const char *file_name, uint16_t command,
1318 struct ofputil_flow_mod **fms, size_t *n_fms)
1320 size_t allocated_fms;
1324 stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
1325 if (stream == NULL) {
1326 ovs_fatal(errno, "%s: open", file_name);
1329 allocated_fms = *n_fms;
1331 while (!ds_get_preprocessed_line(&s, stream)) {
1332 if (*n_fms >= allocated_fms) {
1333 *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
1335 parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command, false);
1340 if (stream != stdin) {
1346 parse_ofp_flow_stats_request_str(struct ofputil_flow_stats_request *fsr,
1347 bool aggregate, const char *string)
1349 struct ofputil_flow_mod fm;
1351 parse_ofp_str(&fm, -1, string, false);
1352 fsr->aggregate = aggregate;
1353 fsr->cookie = fm.cookie;
1354 fsr->cookie_mask = fm.cookie_mask;
1355 fsr->match = fm.match;
1356 fsr->out_port = fm.out_port;
1357 fsr->table_id = fm.table_id;
1360 /* Parses a specification of a flow from 's' into 'flow'. 's' must take the
1361 * form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
1362 * mf_field. Fields must be specified in a natural order for satisfying
1365 * Returns NULL on success, otherwise a malloc()'d string that explains the
1368 parse_ofp_exact_flow(struct flow *flow, const char *s)
1370 char *pos, *key, *value_s;
1374 memset(flow, 0, sizeof *flow);
1376 pos = copy = xstrdup(s);
1377 while (ofputil_parse_key_value(&pos, &key, &value_s)) {
1378 const struct protocol *p;
1379 if (parse_protocol(key, &p)) {
1380 if (flow->dl_type) {
1381 error = xasprintf("%s: Ethernet type set multiple times", s);
1384 flow->dl_type = htons(p->dl_type);
1387 if (flow->nw_proto) {
1388 error = xasprintf("%s: network protocol set "
1389 "multiple times", s);
1392 flow->nw_proto = p->nw_proto;
1395 const struct mf_field *mf;
1396 union mf_value value;
1399 mf = mf_from_name(key);
1401 error = xasprintf("%s: unknown field %s", s, key);
1405 if (!mf_are_prereqs_ok(mf, flow)) {
1406 error = xasprintf("%s: prerequisites not met for setting %s",
1411 if (!mf_is_zero(mf, flow)) {
1412 error = xasprintf("%s: field %s set multiple times", s, key);
1416 field_error = mf_parse_value(mf, value_s, &value);
1418 error = xasprintf("%s: bad value for %s (%s)",
1419 s, key, field_error);
1424 mf_set_flow_value(mf, &value, flow);
1428 if (!flow->in_port.ofp_port) {
1429 flow->in_port.ofp_port = OFPP_NONE;
1436 memset(flow, 0, sizeof *flow);