2 * Copyright (c) 2010, 2011 Nicira Networks.
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 "multipath.h"
33 #include "openflow/openflow.h"
35 #include "socket-util.h"
39 VLOG_DEFINE_THIS_MODULE(ofp_parse);
42 str_to_u32(const char *str)
48 ovs_fatal(0, "missing required numeric argument");
52 value = strtoul(str, &tail, 0);
53 if (errno == EINVAL || errno == ERANGE || *tail) {
54 ovs_fatal(0, "invalid numeric format %s", str);
60 str_to_u64(const char *str)
66 ovs_fatal(0, "missing required numeric argument");
70 value = strtoull(str, &tail, 0);
71 if (errno == EINVAL || errno == ERANGE || *tail) {
72 ovs_fatal(0, "invalid numeric format %s", str);
78 str_to_mac(const char *str, uint8_t mac[6])
80 if (sscanf(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
81 != ETH_ADDR_SCAN_COUNT) {
82 ovs_fatal(0, "invalid mac address %s", str);
87 str_to_ip(const char *str_, ovs_be32 *ip, ovs_be32 *maskp)
89 char *str = xstrdup(str_);
90 char *save_ptr = NULL;
91 const char *name, *netmask;
92 struct in_addr in_addr;
96 name = strtok_r(str, "/", &save_ptr);
97 retval = name ? lookup_ip(name, &in_addr) : EINVAL;
99 ovs_fatal(0, "%s: could not convert to IP address", str);
101 *ip = in_addr.s_addr;
103 netmask = strtok_r(NULL, "/", &save_ptr);
106 if (sscanf(netmask, "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8,
107 &o[0], &o[1], &o[2], &o[3]) == 4) {
108 mask = htonl((o[0] << 24) | (o[1] << 16) | (o[2] << 8) | o[3]);
110 int prefix = atoi(netmask);
111 if (prefix <= 0 || prefix > 32) {
112 ovs_fatal(0, "%s: network prefix bits not between 1 and 32",
114 } else if (prefix == 32) {
115 mask = htonl(UINT32_MAX);
117 mask = htonl(((1u << prefix) - 1) << (32 - prefix));
121 mask = htonl(UINT32_MAX);
128 if (mask != htonl(UINT32_MAX)) {
129 ovs_fatal(0, "%s: netmask not allowed here", str_);
137 str_to_tun_id(const char *str, ovs_be64 *tun_idp, ovs_be64 *maskp)
139 uint64_t tun_id, mask;
143 tun_id = strtoull(str, &tail, 0);
144 if (errno || (*tail != '\0' && *tail != '/')) {
149 mask = strtoull(tail + 1, &tail, 0);
150 if (errno || *tail != '\0') {
157 *tun_idp = htonll(tun_id);
158 *maskp = htonll(mask);
162 ovs_fatal(0, "%s: bad syntax for tunnel id", str);
166 str_to_ipv6(const char *str_, struct in6_addr *addrp, struct in6_addr *maskp)
168 char *str = xstrdup(str_);
169 char *save_ptr = NULL;
170 const char *name, *netmask;
171 struct in6_addr addr, mask;
174 name = strtok_r(str, "/", &save_ptr);
175 retval = name ? lookup_ipv6(name, &addr) : EINVAL;
177 ovs_fatal(0, "%s: could not convert to IPv6 address", str);
180 netmask = strtok_r(NULL, "/", &save_ptr);
182 int prefix = atoi(netmask);
183 if (prefix <= 0 || prefix > 128) {
184 ovs_fatal(0, "%s: network prefix bits not between 1 and 128",
187 mask = ipv6_create_mask(prefix);
190 mask = in6addr_exact;
192 *addrp = ipv6_addr_bitand(&addr, &mask);
197 if (!ipv6_mask_is_exact(&mask)) {
198 ovs_fatal(0, "%s: netmask not allowed here", str_);
206 put_action(struct ofpbuf *b, size_t size, uint16_t type)
208 struct ofp_action_header *ah = ofpbuf_put_zeros(b, size);
209 ah->type = htons(type);
210 ah->len = htons(size);
214 static struct ofp_action_output *
215 put_output_action(struct ofpbuf *b, uint16_t port)
217 struct ofp_action_output *oao = put_action(b, sizeof *oao, OFPAT_OUTPUT);
218 oao->port = htons(port);
223 put_enqueue_action(struct ofpbuf *b, uint16_t port, uint32_t queue)
225 struct ofp_action_enqueue *oae = put_action(b, sizeof *oae, OFPAT_ENQUEUE);
226 oae->port = htons(port);
227 oae->queue_id = htonl(queue);
231 put_dl_addr_action(struct ofpbuf *b, uint16_t type, const char *addr)
233 struct ofp_action_dl_addr *oada = put_action(b, sizeof *oada, type);
234 str_to_mac(addr, oada->dl_addr);
239 parse_port_name(const char *name, uint16_t *port)
245 static const struct pair pairs[] = {
246 #define DEF_PAIR(NAME) {#NAME, OFPP_##NAME}
252 DEF_PAIR(CONTROLLER),
257 static const int n_pairs = ARRAY_SIZE(pairs);
260 for (i = 0; i < n_pairs; i++) {
261 if (!strcasecmp(name, pairs[i].name)) {
262 *port = pairs[i].value;
270 str_to_action(char *str, struct ofpbuf *b)
279 char empty_string[] = "";
284 pos += strspn(pos, ", \t\r\n");
290 ovs_fatal(0, "Drop actions must not be followed by other actions");
294 actlen = strcspn(pos, ":(, \t\r\n");
295 if (act[actlen] == ':') {
296 /* The argument can be separated by a colon. */
299 arg = act + actlen + 1;
300 arglen = strcspn(arg, ", \t\r\n");
301 pos = arg + arglen + (arg[arglen] != '\0');
303 } else if (act[actlen] == '(') {
304 /* The argument can be surrounded by balanced parentheses. The
305 * outermost set of parentheses is removed. */
309 arg = act + actlen + 1;
310 for (arglen = 0; level > 0; arglen++) {
311 switch (arg[arglen]) {
313 ovs_fatal(0, "unbalanced parentheses in argument to %s "
325 arg[arglen - 1] = '\0';
328 /* There might be no argument at all. */
330 pos = act + actlen + (act[actlen] != '\0');
334 if (!strcasecmp(act, "mod_vlan_vid")) {
335 struct ofp_action_vlan_vid *va;
336 va = put_action(b, sizeof *va, OFPAT_SET_VLAN_VID);
337 va->vlan_vid = htons(str_to_u32(arg));
338 } else if (!strcasecmp(act, "mod_vlan_pcp")) {
339 struct ofp_action_vlan_pcp *va;
340 va = put_action(b, sizeof *va, OFPAT_SET_VLAN_PCP);
341 va->vlan_pcp = str_to_u32(arg);
342 } else if (!strcasecmp(act, "strip_vlan")) {
343 struct ofp_action_header *ah;
344 ah = put_action(b, sizeof *ah, OFPAT_STRIP_VLAN);
345 ah->type = htons(OFPAT_STRIP_VLAN);
346 } else if (!strcasecmp(act, "mod_dl_src")) {
347 put_dl_addr_action(b, OFPAT_SET_DL_SRC, arg);
348 } else if (!strcasecmp(act, "mod_dl_dst")) {
349 put_dl_addr_action(b, OFPAT_SET_DL_DST, arg);
350 } else if (!strcasecmp(act, "mod_nw_src")) {
351 struct ofp_action_nw_addr *na;
352 na = put_action(b, sizeof *na, OFPAT_SET_NW_SRC);
353 str_to_ip(arg, &na->nw_addr, NULL);
354 } else if (!strcasecmp(act, "mod_nw_dst")) {
355 struct ofp_action_nw_addr *na;
356 na = put_action(b, sizeof *na, OFPAT_SET_NW_DST);
357 str_to_ip(arg, &na->nw_addr, NULL);
358 } else if (!strcasecmp(act, "mod_tp_src")) {
359 struct ofp_action_tp_port *ta;
360 ta = put_action(b, sizeof *ta, OFPAT_SET_TP_SRC);
361 ta->tp_port = htons(str_to_u32(arg));
362 } else if (!strcasecmp(act, "mod_tp_dst")) {
363 struct ofp_action_tp_port *ta;
364 ta = put_action(b, sizeof *ta, OFPAT_SET_TP_DST);
365 ta->tp_port = htons(str_to_u32(arg));
366 } else if (!strcasecmp(act, "mod_nw_tos")) {
367 struct ofp_action_nw_tos *nt;
368 nt = put_action(b, sizeof *nt, OFPAT_SET_NW_TOS);
369 nt->nw_tos = str_to_u32(arg);
370 } else if (!strcasecmp(act, "resubmit")) {
371 struct nx_action_resubmit *nar;
372 nar = put_action(b, sizeof *nar, OFPAT_VENDOR);
373 nar->vendor = htonl(NX_VENDOR_ID);
374 nar->subtype = htons(NXAST_RESUBMIT);
375 nar->in_port = htons(str_to_u32(arg));
376 } else if (!strcasecmp(act, "set_tunnel")
377 || !strcasecmp(act, "set_tunnel64")) {
378 uint64_t tun_id = str_to_u64(arg);
379 if (!strcasecmp(act, "set_tunnel64") || tun_id > UINT32_MAX) {
380 struct nx_action_set_tunnel64 *nast64;
381 nast64 = put_action(b, sizeof *nast64, OFPAT_VENDOR);
382 nast64->vendor = htonl(NX_VENDOR_ID);
383 nast64->subtype = htons(NXAST_SET_TUNNEL64);
384 nast64->tun_id = htonll(tun_id);
386 struct nx_action_set_tunnel *nast;
387 nast = put_action(b, sizeof *nast, OFPAT_VENDOR);
388 nast->vendor = htonl(NX_VENDOR_ID);
389 nast->subtype = htons(NXAST_SET_TUNNEL);
390 nast->tun_id = htonl(tun_id);
392 } else if (!strcasecmp(act, "drop_spoofed_arp")) {
393 struct nx_action_header *nah;
394 nah = put_action(b, sizeof *nah, OFPAT_VENDOR);
395 nah->vendor = htonl(NX_VENDOR_ID);
396 nah->subtype = htons(NXAST_DROP_SPOOFED_ARP);
397 } else if (!strcasecmp(act, "set_queue")) {
398 struct nx_action_set_queue *nasq;
399 nasq = put_action(b, sizeof *nasq, OFPAT_VENDOR);
400 nasq->vendor = htonl(NX_VENDOR_ID);
401 nasq->subtype = htons(NXAST_SET_QUEUE);
402 nasq->queue_id = htonl(str_to_u32(arg));
403 } else if (!strcasecmp(act, "pop_queue")) {
404 struct nx_action_header *nah;
405 nah = put_action(b, sizeof *nah, OFPAT_VENDOR);
406 nah->vendor = htonl(NX_VENDOR_ID);
407 nah->subtype = htons(NXAST_POP_QUEUE);
408 } else if (!strcasecmp(act, "note")) {
409 size_t start_ofs = b->size;
410 struct nx_action_note *nan;
414 nan = put_action(b, sizeof *nan, OFPAT_VENDOR);
415 nan->vendor = htonl(NX_VENDOR_ID);
416 nan->subtype = htons(NXAST_NOTE);
418 b->size -= sizeof nan->note;
419 while (*arg != '\0') {
430 byte = hexits_value(arg, 2, &ok);
432 ovs_fatal(0, "bad hex digit in `note' argument");
434 ofpbuf_put(b, &byte, 1);
439 len = b->size - start_ofs;
440 remainder = len % OFP_ACTION_ALIGN;
442 ofpbuf_put_zeros(b, OFP_ACTION_ALIGN - remainder);
444 nan->len = htons(b->size - start_ofs);
445 } else if (!strcasecmp(act, "move")) {
446 struct nx_action_reg_move *move;
447 move = ofpbuf_put_uninit(b, sizeof *move);
448 nxm_parse_reg_move(move, arg);
449 } else if (!strcasecmp(act, "load")) {
450 struct nx_action_reg_load *load;
451 load = ofpbuf_put_uninit(b, sizeof *load);
452 nxm_parse_reg_load(load, arg);
453 } else if (!strcasecmp(act, "multipath")) {
454 struct nx_action_multipath *nam;
455 nam = ofpbuf_put_uninit(b, sizeof *nam);
456 multipath_parse(nam, arg);
457 } else if (!strcasecmp(act, "autopath")) {
458 struct nx_action_autopath *naa;
459 naa = ofpbuf_put_uninit(b, sizeof *naa);
460 autopath_parse(naa, arg);
461 } else if (!strcasecmp(act, "output")) {
462 put_output_action(b, str_to_u32(arg));
463 } else if (!strcasecmp(act, "enqueue")) {
465 char *port_s = strtok_r(arg, ":q", &sp);
466 char *queue = strtok_r(NULL, "", &sp);
467 if (port_s == NULL || queue == NULL) {
468 ovs_fatal(0, "\"enqueue\" syntax is \"enqueue:PORT:QUEUE\"");
470 put_enqueue_action(b, str_to_u32(port_s), str_to_u32(queue));
471 } else if (!strcasecmp(act, "drop")) {
472 /* A drop action in OpenFlow occurs by just not setting
476 ovs_fatal(0, "Drop actions must not be preceded by other "
479 } else if (!strcasecmp(act, "CONTROLLER")) {
480 struct ofp_action_output *oao;
481 oao = put_output_action(b, OFPP_CONTROLLER);
483 /* Unless a numeric argument is specified, we send the whole
484 * packet to the controller. */
485 if (arg[0] && (strspn(arg, "0123456789") == strlen(arg))) {
486 oao->max_len = htons(str_to_u32(arg));
488 oao->max_len = htons(UINT16_MAX);
490 } else if (parse_port_name(act, &port)) {
491 put_output_action(b, port);
492 } else if (strspn(act, "0123456789") == strlen(act)) {
493 put_output_action(b, str_to_u32(act));
495 ovs_fatal(0, "Unknown action: %s", act);
508 parse_protocol(const char *name, const struct protocol **p_out)
510 static const struct protocol protocols[] = {
511 { "ip", ETH_TYPE_IP, 0 },
512 { "arp", ETH_TYPE_ARP, 0 },
513 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
514 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
515 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
516 { "ipv6", ETH_TYPE_IPV6, 0 },
517 { "ip6", ETH_TYPE_IPV6, 0 },
518 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
519 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
520 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
522 const struct protocol *p;
524 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
525 if (!strcmp(p->name, name)) {
535 FIELD(F_TUN_ID, "tun_id", 0) \
536 FIELD(F_IN_PORT, "in_port", FWW_IN_PORT) \
537 FIELD(F_DL_VLAN, "dl_vlan", 0) \
538 FIELD(F_DL_VLAN_PCP, "dl_vlan_pcp", 0) \
539 FIELD(F_DL_SRC, "dl_src", FWW_DL_SRC) \
540 FIELD(F_DL_DST, "dl_dst", FWW_DL_DST) \
541 FIELD(F_DL_TYPE, "dl_type", FWW_DL_TYPE) \
542 FIELD(F_NW_SRC, "nw_src", 0) \
543 FIELD(F_NW_DST, "nw_dst", 0) \
544 FIELD(F_NW_PROTO, "nw_proto", FWW_NW_PROTO) \
545 FIELD(F_NW_TOS, "nw_tos", FWW_NW_TOS) \
546 FIELD(F_TP_SRC, "tp_src", FWW_TP_SRC) \
547 FIELD(F_TP_DST, "tp_dst", FWW_TP_DST) \
548 FIELD(F_ICMP_TYPE, "icmp_type", FWW_TP_SRC) \
549 FIELD(F_ICMP_CODE, "icmp_code", FWW_TP_DST) \
550 FIELD(F_ARP_SHA, "arp_sha", FWW_ARP_SHA) \
551 FIELD(F_ARP_THA, "arp_tha", FWW_ARP_THA) \
552 FIELD(F_IPV6_SRC, "ipv6_src", 0) \
553 FIELD(F_IPV6_DST, "ipv6_dst", 0) \
554 FIELD(F_ND_TARGET, "nd_target", FWW_ND_TARGET) \
555 FIELD(F_ND_SLL, "nd_sll", FWW_ARP_SHA) \
556 FIELD(F_ND_TLL, "nd_tll", FWW_ARP_THA)
559 #define FIELD(ENUM, NAME, WILDCARD) ENUM,
566 enum field_index index;
568 flow_wildcards_t wildcard; /* FWW_* bit. */
572 parse_field_name(const char *name, const struct field **f_out)
574 static const struct field fields[N_FIELDS] = {
575 #define FIELD(ENUM, NAME, WILDCARD) { ENUM, NAME, WILDCARD },
579 const struct field *f;
581 for (f = fields; f < &fields[ARRAY_SIZE(fields)]; f++) {
582 if (!strcmp(f->name, name)) {
592 parse_field_value(struct cls_rule *rule, enum field_index index,
595 uint8_t mac[ETH_ADDR_LEN];
596 ovs_be64 tun_id, tun_mask;
598 struct in6_addr ipv6, ipv6_mask;
603 str_to_tun_id(value, &tun_id, &tun_mask);
604 cls_rule_set_tun_id_masked(rule, tun_id, tun_mask);
608 if (!parse_port_name(value, &port_no)) {
609 port_no = atoi(value);
611 if (port_no == OFPP_LOCAL) {
612 port_no = ODPP_LOCAL;
614 cls_rule_set_in_port(rule, port_no);
618 cls_rule_set_dl_vlan(rule, htons(str_to_u32(value)));
622 cls_rule_set_dl_vlan_pcp(rule, str_to_u32(value));
626 str_to_mac(value, mac);
627 cls_rule_set_dl_src(rule, mac);
631 str_to_mac(value, mac);
632 cls_rule_set_dl_dst(rule, mac);
636 cls_rule_set_dl_type(rule, htons(str_to_u32(value)));
640 str_to_ip(value, &ip, &mask);
641 cls_rule_set_nw_src_masked(rule, ip, mask);
645 str_to_ip(value, &ip, &mask);
646 cls_rule_set_nw_dst_masked(rule, ip, mask);
650 cls_rule_set_nw_proto(rule, str_to_u32(value));
654 cls_rule_set_nw_tos(rule, str_to_u32(value));
658 cls_rule_set_tp_src(rule, htons(str_to_u32(value)));
662 cls_rule_set_tp_dst(rule, htons(str_to_u32(value)));
666 cls_rule_set_icmp_type(rule, str_to_u32(value));
670 cls_rule_set_icmp_code(rule, str_to_u32(value));
674 str_to_mac(value, mac);
675 cls_rule_set_arp_sha(rule, mac);
679 str_to_mac(value, mac);
680 cls_rule_set_arp_tha(rule, mac);
684 str_to_ipv6(value, &ipv6, &ipv6_mask);
685 cls_rule_set_ipv6_src_masked(rule, &ipv6, &ipv6_mask);
689 str_to_ipv6(value, &ipv6, &ipv6_mask);
690 cls_rule_set_ipv6_dst_masked(rule, &ipv6, &ipv6_mask);
694 str_to_ipv6(value, &ipv6, NULL);
695 cls_rule_set_nd_target(rule, ipv6);
699 str_to_mac(value, mac);
700 cls_rule_set_arp_sha(rule, mac);
704 str_to_mac(value, mac);
705 cls_rule_set_arp_tha(rule, mac);
714 parse_reg_value(struct cls_rule *rule, int reg_idx, const char *value)
716 uint32_t reg_value, reg_mask;
718 if (!strcmp(value, "ANY") || !strcmp(value, "*")) {
719 cls_rule_set_reg_masked(rule, reg_idx, 0, 0);
720 } else if (sscanf(value, "%"SCNi32"/%"SCNi32,
721 ®_value, ®_mask) == 2) {
722 cls_rule_set_reg_masked(rule, reg_idx, reg_value, reg_mask);
723 } else if (sscanf(value, "%"SCNi32, ®_value)) {
724 cls_rule_set_reg(rule, reg_idx, reg_value);
726 ovs_fatal(0, "register fields must take the form <value> "
727 "or <value>/<mask>");
731 /* Convert 'string' (as described in the Flow Syntax section of the ovs-ofctl
732 * man page) into 'pf'. If 'actions' is specified, an action must be in
733 * 'string' and may be expanded or reallocated. */
735 parse_ofp_str(struct flow_mod *fm, uint8_t *table_idx,
736 struct ofpbuf *actions, char *string)
738 char *save_ptr = NULL;
744 cls_rule_init_catchall(&fm->cr, OFP_DEFAULT_PRIORITY);
745 fm->cookie = htonll(0);
746 fm->command = UINT16_MAX;
747 fm->idle_timeout = OFP_FLOW_PERMANENT;
748 fm->hard_timeout = OFP_FLOW_PERMANENT;
749 fm->buffer_id = UINT32_MAX;
750 fm->out_port = OFPP_NONE;
753 char *act_str = strstr(string, "action");
755 ovs_fatal(0, "must specify an action");
759 act_str = strchr(act_str + 1, '=');
761 ovs_fatal(0, "must specify an action");
766 str_to_action(act_str, actions);
767 fm->actions = actions->data;
768 fm->n_actions = actions->size / sizeof(union ofp_action);
773 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
774 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
775 const struct protocol *p;
777 if (parse_protocol(name, &p)) {
778 cls_rule_set_dl_type(&fm->cr, htons(p->dl_type));
780 cls_rule_set_nw_proto(&fm->cr, p->nw_proto);
783 const struct field *f;
786 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
788 ovs_fatal(0, "field %s missing value", name);
791 if (table_idx && !strcmp(name, "table")) {
792 *table_idx = atoi(value);
793 } else if (!strcmp(name, "out_port")) {
794 fm->out_port = atoi(value);
795 } else if (!strcmp(name, "priority")) {
796 fm->cr.priority = atoi(value);
797 } else if (!strcmp(name, "idle_timeout")) {
798 fm->idle_timeout = atoi(value);
799 } else if (!strcmp(name, "hard_timeout")) {
800 fm->hard_timeout = atoi(value);
801 } else if (!strcmp(name, "cookie")) {
802 fm->cookie = htonll(str_to_u64(value));
803 } else if (parse_field_name(name, &f)) {
804 if (!strcmp(value, "*") || !strcmp(value, "ANY")) {
806 fm->cr.wc.wildcards |= f->wildcard;
807 cls_rule_zero_wildcarded_fields(&fm->cr);
808 } else if (f->index == F_NW_SRC) {
809 cls_rule_set_nw_src_masked(&fm->cr, 0, 0);
810 } else if (f->index == F_NW_DST) {
811 cls_rule_set_nw_dst_masked(&fm->cr, 0, 0);
812 } else if (f->index == F_IPV6_SRC) {
813 cls_rule_set_ipv6_src_masked(&fm->cr,
814 &in6addr_any, &in6addr_any);
815 } else if (f->index == F_IPV6_DST) {
816 cls_rule_set_ipv6_dst_masked(&fm->cr,
817 &in6addr_any, &in6addr_any);
818 } else if (f->index == F_DL_VLAN) {
819 cls_rule_set_any_vid(&fm->cr);
820 } else if (f->index == F_DL_VLAN_PCP) {
821 cls_rule_set_any_pcp(&fm->cr);
826 parse_field_value(&fm->cr, f->index, value);
828 } else if (!strncmp(name, "reg", 3)
829 && isdigit((unsigned char) name[3])) {
830 unsigned int reg_idx = atoi(name + 3);
831 if (reg_idx >= FLOW_N_REGS) {
832 ovs_fatal(0, "only %d registers supported", FLOW_N_REGS);
834 parse_reg_value(&fm->cr, reg_idx, value);
836 ovs_fatal(0, "unknown keyword %s", name);
842 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
843 * (one of OFPFC_*) and appends the parsed OpenFlow message to 'packets'.
844 * '*cur_format' should initially contain the flow format currently configured
845 * on the connection; this function will add a message to change the flow
846 * format and update '*cur_format', if this is necessary to add the parsed
849 parse_ofp_flow_mod_str(struct list *packets, enum nx_flow_format *cur_format,
850 char *string, uint16_t command)
852 bool is_del = command == OFPFC_DELETE || command == OFPFC_DELETE_STRICT;
853 enum nx_flow_format min_format, next_format;
854 struct ofpbuf actions;
858 ofpbuf_init(&actions, 64);
859 parse_ofp_str(&fm, NULL, is_del ? NULL : &actions, string);
860 fm.command = command;
862 min_format = ofputil_min_flow_format(&fm.cr, true, fm.cookie);
863 next_format = MAX(*cur_format, min_format);
864 if (next_format != *cur_format) {
865 struct ofpbuf *sff = ofputil_make_set_flow_format(next_format);
866 list_push_back(packets, &sff->list_node);
867 *cur_format = next_format;
870 ofm = ofputil_encode_flow_mod(&fm, *cur_format);
871 list_push_back(packets, &ofm->list_node);
873 ofpbuf_uninit(&actions);
876 /* Similar to parse_ofp_flow_mod_str(), except that the string is read from
877 * 'stream' and the command is always OFPFC_ADD. Returns false if end-of-file
878 * is reached before reading a flow, otherwise true. */
880 parse_ofp_flow_mod_file(struct list *packets, enum nx_flow_format *cur,
881 FILE *stream, uint16_t command)
887 ok = ds_get_preprocessed_line(&s, stream) == 0;
889 parse_ofp_flow_mod_str(packets, cur, ds_cstr(&s), command);
897 parse_ofp_flow_stats_request_str(struct flow_stats_request *fsr,
898 bool aggregate, char *string)
903 parse_ofp_str(&fm, &table_id, NULL, string);
904 fsr->aggregate = aggregate;
906 fsr->out_port = fm.out_port;
907 fsr->table_id = table_id;