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"
25 #include "byte-order.h"
26 #include "dynamic-string.h"
28 #include "multipath.h"
32 #include "openflow/openflow.h"
34 #include "socket-util.h"
38 VLOG_DEFINE_THIS_MODULE(ofp_parse);
41 str_to_u32(const char *str)
47 ovs_fatal(0, "missing required numeric argument");
51 value = strtoul(str, &tail, 0);
52 if (errno == EINVAL || errno == ERANGE || *tail) {
53 ovs_fatal(0, "invalid numeric format %s", str);
59 str_to_u64(const char *str)
65 value = strtoull(str, &tail, 0);
66 if (errno == EINVAL || errno == ERANGE || *tail) {
67 ovs_fatal(0, "invalid numeric format %s", str);
73 str_to_mac(const char *str, uint8_t mac[6])
75 if (sscanf(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
76 != ETH_ADDR_SCAN_COUNT) {
77 ovs_fatal(0, "invalid mac address %s", str);
82 str_to_ip(const char *str_, ovs_be32 *ip, ovs_be32 *maskp)
84 char *str = xstrdup(str_);
85 char *save_ptr = NULL;
86 const char *name, *netmask;
87 struct in_addr in_addr;
91 name = strtok_r(str, "/", &save_ptr);
92 retval = name ? lookup_ip(name, &in_addr) : EINVAL;
94 ovs_fatal(0, "%s: could not convert to IP address", str);
98 netmask = strtok_r(NULL, "/", &save_ptr);
101 if (sscanf(netmask, "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8,
102 &o[0], &o[1], &o[2], &o[3]) == 4) {
103 mask = htonl((o[0] << 24) | (o[1] << 16) | (o[2] << 8) | o[3]);
105 int prefix = atoi(netmask);
106 if (prefix <= 0 || prefix > 32) {
107 ovs_fatal(0, "%s: network prefix bits not between 1 and 32",
109 } else if (prefix == 32) {
110 mask = htonl(UINT32_MAX);
112 mask = htonl(((1u << prefix) - 1) << (32 - prefix));
116 mask = htonl(UINT32_MAX);
123 if (mask != htonl(UINT32_MAX)) {
124 ovs_fatal(0, "%s: netmask not allowed here", str_);
132 str_to_tun_id(const char *str, ovs_be64 *tun_idp, ovs_be64 *maskp)
134 uint64_t tun_id, mask;
138 tun_id = strtoull(str, &tail, 0);
139 if (errno || (*tail != '\0' && *tail != '/')) {
144 mask = strtoull(tail + 1, &tail, 0);
145 if (errno || *tail != '\0') {
152 *tun_idp = htonll(tun_id);
153 *maskp = htonll(mask);
157 ovs_fatal(0, "%s: bad syntax for tunnel id", str);
161 str_to_ipv6(const char *str_, struct in6_addr *addrp, struct in6_addr *maskp)
163 char *str = xstrdup(str_);
164 char *save_ptr = NULL;
165 const char *name, *netmask;
166 struct in6_addr addr, mask;
169 name = strtok_r(str, "/", &save_ptr);
170 retval = name ? lookup_ipv6(name, &addr) : EINVAL;
172 ovs_fatal(0, "%s: could not convert to IPv6 address", str);
175 netmask = strtok_r(NULL, "/", &save_ptr);
177 int prefix = atoi(netmask);
178 if (prefix <= 0 || prefix > 128) {
179 ovs_fatal(0, "%s: network prefix bits not between 1 and 128",
182 mask = ipv6_create_mask(prefix);
185 mask = in6addr_exact;
187 *addrp = ipv6_addr_bitand(&addr, &mask);
192 if (!ipv6_mask_is_exact(&mask)) {
193 ovs_fatal(0, "%s: netmask not allowed here", str_);
201 put_action(struct ofpbuf *b, size_t size, uint16_t type)
203 struct ofp_action_header *ah = ofpbuf_put_zeros(b, size);
204 ah->type = htons(type);
205 ah->len = htons(size);
209 static struct ofp_action_output *
210 put_output_action(struct ofpbuf *b, uint16_t port)
212 struct ofp_action_output *oao = put_action(b, sizeof *oao, OFPAT_OUTPUT);
213 oao->port = htons(port);
218 put_enqueue_action(struct ofpbuf *b, uint16_t port, uint32_t queue)
220 struct ofp_action_enqueue *oae = put_action(b, sizeof *oae, OFPAT_ENQUEUE);
221 oae->port = htons(port);
222 oae->queue_id = htonl(queue);
226 put_dl_addr_action(struct ofpbuf *b, uint16_t type, const char *addr)
228 struct ofp_action_dl_addr *oada = put_action(b, sizeof *oada, type);
229 str_to_mac(addr, oada->dl_addr);
234 parse_port_name(const char *name, uint16_t *port)
240 static const struct pair pairs[] = {
241 #define DEF_PAIR(NAME) {#NAME, OFPP_##NAME}
247 DEF_PAIR(CONTROLLER),
252 static const int n_pairs = ARRAY_SIZE(pairs);
255 for (i = 0; i < n_pairs; i++) {
256 if (!strcasecmp(name, pairs[i].name)) {
257 *port = pairs[i].value;
265 str_to_action(char *str, struct ofpbuf *b)
278 pos += strspn(pos, ", \t\r\n");
284 ovs_fatal(0, "Drop actions must not be followed by other actions");
288 actlen = strcspn(pos, ":(, \t\r\n");
289 if (act[actlen] == ':') {
290 /* The argument can be separated by a colon. */
293 arg = act + actlen + 1;
294 arglen = strcspn(arg, ", \t\r\n");
295 pos = arg + arglen + (arg[arglen] != '\0');
297 } else if (act[actlen] == '(') {
298 /* The argument can be surrounded by balanced parentheses. The
299 * outermost set of parentheses is removed. */
303 arg = act + actlen + 1;
304 for (arglen = 0; level > 0; arglen++) {
305 switch (arg[arglen]) {
307 ovs_fatal(0, "unbalanced parentheses in argument to %s "
319 arg[arglen - 1] = '\0';
322 /* There might be no argument at all. */
324 pos = act + actlen + (act[actlen] != '\0');
328 if (!strcasecmp(act, "mod_vlan_vid")) {
329 struct ofp_action_vlan_vid *va;
330 va = put_action(b, sizeof *va, OFPAT_SET_VLAN_VID);
331 va->vlan_vid = htons(str_to_u32(arg));
332 } else if (!strcasecmp(act, "mod_vlan_pcp")) {
333 struct ofp_action_vlan_pcp *va;
334 va = put_action(b, sizeof *va, OFPAT_SET_VLAN_PCP);
335 va->vlan_pcp = str_to_u32(arg);
336 } else if (!strcasecmp(act, "strip_vlan")) {
337 struct ofp_action_header *ah;
338 ah = put_action(b, sizeof *ah, OFPAT_STRIP_VLAN);
339 ah->type = htons(OFPAT_STRIP_VLAN);
340 } else if (!strcasecmp(act, "mod_dl_src")) {
341 put_dl_addr_action(b, OFPAT_SET_DL_SRC, arg);
342 } else if (!strcasecmp(act, "mod_dl_dst")) {
343 put_dl_addr_action(b, OFPAT_SET_DL_DST, arg);
344 } else if (!strcasecmp(act, "mod_nw_src")) {
345 struct ofp_action_nw_addr *na;
346 na = put_action(b, sizeof *na, OFPAT_SET_NW_SRC);
347 str_to_ip(arg, &na->nw_addr, NULL);
348 } else if (!strcasecmp(act, "mod_nw_dst")) {
349 struct ofp_action_nw_addr *na;
350 na = put_action(b, sizeof *na, OFPAT_SET_NW_DST);
351 str_to_ip(arg, &na->nw_addr, NULL);
352 } else if (!strcasecmp(act, "mod_tp_src")) {
353 struct ofp_action_tp_port *ta;
354 ta = put_action(b, sizeof *ta, OFPAT_SET_TP_SRC);
355 ta->tp_port = htons(str_to_u32(arg));
356 } else if (!strcasecmp(act, "mod_tp_dst")) {
357 struct ofp_action_tp_port *ta;
358 ta = put_action(b, sizeof *ta, OFPAT_SET_TP_DST);
359 ta->tp_port = htons(str_to_u32(arg));
360 } else if (!strcasecmp(act, "mod_nw_tos")) {
361 struct ofp_action_nw_tos *nt;
362 nt = put_action(b, sizeof *nt, OFPAT_SET_NW_TOS);
363 nt->nw_tos = str_to_u32(arg);
364 } else if (!strcasecmp(act, "resubmit")) {
365 struct nx_action_resubmit *nar;
366 nar = put_action(b, sizeof *nar, OFPAT_VENDOR);
367 nar->vendor = htonl(NX_VENDOR_ID);
368 nar->subtype = htons(NXAST_RESUBMIT);
369 nar->in_port = htons(str_to_u32(arg));
370 } else if (!strcasecmp(act, "set_tunnel")
371 || !strcasecmp(act, "set_tunnel64")) {
372 uint64_t tun_id = str_to_u64(arg);
373 if (!strcasecmp(act, "set_tunnel64") || tun_id > UINT32_MAX) {
374 struct nx_action_set_tunnel64 *nast64;
375 nast64 = put_action(b, sizeof *nast64, OFPAT_VENDOR);
376 nast64->vendor = htonl(NX_VENDOR_ID);
377 nast64->subtype = htons(NXAST_SET_TUNNEL64);
378 nast64->tun_id = htonll(tun_id);
380 struct nx_action_set_tunnel *nast;
381 nast = put_action(b, sizeof *nast, OFPAT_VENDOR);
382 nast->vendor = htonl(NX_VENDOR_ID);
383 nast->subtype = htons(NXAST_SET_TUNNEL);
384 nast->tun_id = htonl(tun_id);
386 } else if (!strcasecmp(act, "drop_spoofed_arp")) {
387 struct nx_action_header *nah;
388 nah = put_action(b, sizeof *nah, OFPAT_VENDOR);
389 nah->vendor = htonl(NX_VENDOR_ID);
390 nah->subtype = htons(NXAST_DROP_SPOOFED_ARP);
391 } else if (!strcasecmp(act, "set_queue")) {
392 struct nx_action_set_queue *nasq;
393 nasq = put_action(b, sizeof *nasq, OFPAT_VENDOR);
394 nasq->vendor = htonl(NX_VENDOR_ID);
395 nasq->subtype = htons(NXAST_SET_QUEUE);
396 nasq->queue_id = htonl(str_to_u32(arg));
397 } else if (!strcasecmp(act, "pop_queue")) {
398 struct nx_action_header *nah;
399 nah = put_action(b, sizeof *nah, OFPAT_VENDOR);
400 nah->vendor = htonl(NX_VENDOR_ID);
401 nah->subtype = htons(NXAST_POP_QUEUE);
402 } else if (!strcasecmp(act, "note")) {
403 size_t start_ofs = b->size;
404 struct nx_action_note *nan;
408 nan = put_action(b, sizeof *nan, OFPAT_VENDOR);
409 nan->vendor = htonl(NX_VENDOR_ID);
410 nan->subtype = htons(NXAST_NOTE);
412 b->size -= sizeof nan->note;
413 while (arg && *arg != '\0') {
424 byte = hexits_value(arg, 2, &ok);
426 ovs_fatal(0, "bad hex digit in `note' argument");
428 ofpbuf_put(b, &byte, 1);
433 len = b->size - start_ofs;
434 remainder = len % OFP_ACTION_ALIGN;
436 ofpbuf_put_zeros(b, OFP_ACTION_ALIGN - remainder);
438 nan->len = htons(b->size - start_ofs);
439 } else if (!strcasecmp(act, "move")) {
440 struct nx_action_reg_move *move;
441 move = ofpbuf_put_uninit(b, sizeof *move);
442 nxm_parse_reg_move(move, arg);
443 } else if (!strcasecmp(act, "load")) {
444 struct nx_action_reg_load *load;
445 load = ofpbuf_put_uninit(b, sizeof *load);
446 nxm_parse_reg_load(load, arg);
447 } else if (!strcasecmp(act, "multipath")) {
448 struct nx_action_multipath *nam;
449 nam = ofpbuf_put_uninit(b, sizeof *nam);
450 multipath_parse(nam, arg);
451 } else if (!strcasecmp(act, "output")) {
452 put_output_action(b, str_to_u32(arg));
453 } else if (!strcasecmp(act, "enqueue")) {
455 char *port_s = strtok_r(arg, ":q", &sp);
456 char *queue = strtok_r(NULL, "", &sp);
457 if (port_s == NULL || queue == NULL) {
458 ovs_fatal(0, "\"enqueue\" syntax is \"enqueue:PORT:QUEUE\"");
460 put_enqueue_action(b, str_to_u32(port_s), str_to_u32(queue));
461 } else if (!strcasecmp(act, "drop")) {
462 /* A drop action in OpenFlow occurs by just not setting
466 ovs_fatal(0, "Drop actions must not be preceded by other "
469 } else if (!strcasecmp(act, "CONTROLLER")) {
470 struct ofp_action_output *oao;
471 oao = put_output_action(b, OFPP_CONTROLLER);
473 /* Unless a numeric argument is specified, we send the whole
474 * packet to the controller. */
475 if (arg && (strspn(arg, "0123456789") == strlen(arg))) {
476 oao->max_len = htons(str_to_u32(arg));
478 oao->max_len = htons(UINT16_MAX);
480 } else if (parse_port_name(act, &port)) {
481 put_output_action(b, port);
482 } else if (strspn(act, "0123456789") == strlen(act)) {
483 put_output_action(b, str_to_u32(act));
485 ovs_fatal(0, "Unknown action: %s", act);
498 parse_protocol(const char *name, const struct protocol **p_out)
500 static const struct protocol protocols[] = {
501 { "ip", ETH_TYPE_IP, 0 },
502 { "arp", ETH_TYPE_ARP, 0 },
503 { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
504 { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
505 { "udp", ETH_TYPE_IP, IPPROTO_UDP },
506 { "ipv6", ETH_TYPE_IPV6, 0 },
507 { "ip6", ETH_TYPE_IPV6, 0 },
508 { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
509 { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
510 { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
512 const struct protocol *p;
514 for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
515 if (!strcmp(p->name, name)) {
525 FIELD(F_TUN_ID, "tun_id", 0) \
526 FIELD(F_IN_PORT, "in_port", FWW_IN_PORT) \
527 FIELD(F_DL_VLAN, "dl_vlan", 0) \
528 FIELD(F_DL_VLAN_PCP, "dl_vlan_pcp", 0) \
529 FIELD(F_DL_SRC, "dl_src", FWW_DL_SRC) \
530 FIELD(F_DL_DST, "dl_dst", FWW_DL_DST) \
531 FIELD(F_DL_TYPE, "dl_type", FWW_DL_TYPE) \
532 FIELD(F_NW_SRC, "nw_src", 0) \
533 FIELD(F_NW_DST, "nw_dst", 0) \
534 FIELD(F_NW_PROTO, "nw_proto", FWW_NW_PROTO) \
535 FIELD(F_NW_TOS, "nw_tos", FWW_NW_TOS) \
536 FIELD(F_TP_SRC, "tp_src", FWW_TP_SRC) \
537 FIELD(F_TP_DST, "tp_dst", FWW_TP_DST) \
538 FIELD(F_ICMP_TYPE, "icmp_type", FWW_TP_SRC) \
539 FIELD(F_ICMP_CODE, "icmp_code", FWW_TP_DST) \
540 FIELD(F_ARP_SHA, "arp_sha", FWW_ARP_SHA) \
541 FIELD(F_ARP_THA, "arp_tha", FWW_ARP_THA) \
542 FIELD(F_IPV6_SRC, "ipv6_src", 0) \
543 FIELD(F_IPV6_DST, "ipv6_dst", 0) \
544 FIELD(F_ND_TARGET, "nd_target", FWW_ND_TARGET) \
545 FIELD(F_ND_SLL, "nd_sll", FWW_ARP_SHA) \
546 FIELD(F_ND_TLL, "nd_tll", FWW_ARP_THA)
549 #define FIELD(ENUM, NAME, WILDCARD) ENUM,
556 enum field_index index;
558 flow_wildcards_t wildcard; /* FWW_* bit. */
562 parse_field_name(const char *name, const struct field **f_out)
564 static const struct field fields[N_FIELDS] = {
565 #define FIELD(ENUM, NAME, WILDCARD) { ENUM, NAME, WILDCARD },
569 const struct field *f;
571 for (f = fields; f < &fields[ARRAY_SIZE(fields)]; f++) {
572 if (!strcmp(f->name, name)) {
582 parse_field_value(struct cls_rule *rule, enum field_index index,
585 uint8_t mac[ETH_ADDR_LEN];
586 ovs_be64 tun_id, tun_mask;
588 struct in6_addr ipv6, ipv6_mask;
593 str_to_tun_id(value, &tun_id, &tun_mask);
594 cls_rule_set_tun_id_masked(rule, tun_id, tun_mask);
598 if (!parse_port_name(value, &port_no)) {
599 port_no = atoi(value);
601 if (port_no == OFPP_LOCAL) {
602 port_no = ODPP_LOCAL;
604 cls_rule_set_in_port(rule, port_no);
608 cls_rule_set_dl_vlan(rule, htons(str_to_u32(value)));
612 cls_rule_set_dl_vlan_pcp(rule, str_to_u32(value));
616 str_to_mac(value, mac);
617 cls_rule_set_dl_src(rule, mac);
621 str_to_mac(value, mac);
622 cls_rule_set_dl_dst(rule, mac);
626 cls_rule_set_dl_type(rule, htons(str_to_u32(value)));
630 str_to_ip(value, &ip, &mask);
631 cls_rule_set_nw_src_masked(rule, ip, mask);
635 str_to_ip(value, &ip, &mask);
636 cls_rule_set_nw_dst_masked(rule, ip, mask);
640 cls_rule_set_nw_proto(rule, str_to_u32(value));
644 cls_rule_set_nw_tos(rule, str_to_u32(value));
648 cls_rule_set_tp_src(rule, htons(str_to_u32(value)));
652 cls_rule_set_tp_dst(rule, htons(str_to_u32(value)));
656 cls_rule_set_icmp_type(rule, str_to_u32(value));
660 cls_rule_set_icmp_code(rule, str_to_u32(value));
664 str_to_mac(value, mac);
665 cls_rule_set_arp_sha(rule, mac);
669 str_to_mac(value, mac);
670 cls_rule_set_arp_tha(rule, mac);
674 str_to_ipv6(value, &ipv6, &ipv6_mask);
675 cls_rule_set_ipv6_src_masked(rule, &ipv6, &ipv6_mask);
679 str_to_ipv6(value, &ipv6, &ipv6_mask);
680 cls_rule_set_ipv6_dst_masked(rule, &ipv6, &ipv6_mask);
684 str_to_ipv6(value, &ipv6, NULL);
685 cls_rule_set_nd_target(rule, ipv6);
689 str_to_mac(value, mac);
690 cls_rule_set_arp_sha(rule, mac);
694 str_to_mac(value, mac);
695 cls_rule_set_arp_tha(rule, mac);
704 parse_reg_value(struct cls_rule *rule, int reg_idx, const char *value)
706 uint32_t reg_value, reg_mask;
708 if (!strcmp(value, "ANY") || !strcmp(value, "*")) {
709 cls_rule_set_reg_masked(rule, reg_idx, 0, 0);
710 } else if (sscanf(value, "%"SCNi32"/%"SCNi32,
711 ®_value, ®_mask) == 2) {
712 cls_rule_set_reg_masked(rule, reg_idx, reg_value, reg_mask);
713 } else if (sscanf(value, "%"SCNi32, ®_value)) {
714 cls_rule_set_reg(rule, reg_idx, reg_value);
716 ovs_fatal(0, "register fields must take the form <value> "
717 "or <value>/<mask>");
721 /* Convert 'string' (as described in the Flow Syntax section of the ovs-ofctl
722 * man page) into 'pf'. If 'actions' is specified, an action must be in
723 * 'string' and may be expanded or reallocated. */
725 parse_ofp_str(struct flow_mod *fm, uint8_t *table_idx,
726 struct ofpbuf *actions, char *string)
728 char *save_ptr = NULL;
734 cls_rule_init_catchall(&fm->cr, OFP_DEFAULT_PRIORITY);
735 fm->cookie = htonll(0);
736 fm->command = UINT16_MAX;
737 fm->idle_timeout = OFP_FLOW_PERMANENT;
738 fm->hard_timeout = OFP_FLOW_PERMANENT;
739 fm->buffer_id = UINT32_MAX;
740 fm->out_port = OFPP_NONE;
743 char *act_str = strstr(string, "action");
745 ovs_fatal(0, "must specify an action");
749 act_str = strchr(act_str + 1, '=');
751 ovs_fatal(0, "must specify an action");
756 str_to_action(act_str, actions);
757 fm->actions = actions->data;
758 fm->n_actions = actions->size / sizeof(union ofp_action);
763 for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
764 name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
765 const struct protocol *p;
767 if (parse_protocol(name, &p)) {
768 cls_rule_set_dl_type(&fm->cr, htons(p->dl_type));
770 cls_rule_set_nw_proto(&fm->cr, p->nw_proto);
773 const struct field *f;
776 value = strtok_r(NULL, ", \t\r\n", &save_ptr);
778 ovs_fatal(0, "field %s missing value", name);
781 if (table_idx && !strcmp(name, "table")) {
782 *table_idx = atoi(value);
783 } else if (!strcmp(name, "out_port")) {
784 fm->out_port = atoi(value);
785 } else if (!strcmp(name, "priority")) {
786 fm->cr.priority = atoi(value);
787 } else if (!strcmp(name, "idle_timeout")) {
788 fm->idle_timeout = atoi(value);
789 } else if (!strcmp(name, "hard_timeout")) {
790 fm->hard_timeout = atoi(value);
791 } else if (!strcmp(name, "cookie")) {
792 fm->cookie = htonll(str_to_u64(value));
793 } else if (parse_field_name(name, &f)) {
794 if (!strcmp(value, "*") || !strcmp(value, "ANY")) {
796 fm->cr.wc.wildcards |= f->wildcard;
797 cls_rule_zero_wildcarded_fields(&fm->cr);
798 } else if (f->index == F_NW_SRC) {
799 cls_rule_set_nw_src_masked(&fm->cr, 0, 0);
800 } else if (f->index == F_NW_DST) {
801 cls_rule_set_nw_dst_masked(&fm->cr, 0, 0);
802 } else if (f->index == F_IPV6_SRC) {
803 cls_rule_set_ipv6_src_masked(&fm->cr,
804 &in6addr_any, &in6addr_any);
805 } else if (f->index == F_IPV6_DST) {
806 cls_rule_set_ipv6_dst_masked(&fm->cr,
807 &in6addr_any, &in6addr_any);
808 } else if (f->index == F_DL_VLAN) {
809 cls_rule_set_any_vid(&fm->cr);
810 } else if (f->index == F_DL_VLAN_PCP) {
811 cls_rule_set_any_pcp(&fm->cr);
816 parse_field_value(&fm->cr, f->index, value);
818 } else if (!strncmp(name, "reg", 3) && isdigit(name[3])) {
819 unsigned int reg_idx = atoi(name + 3);
820 if (reg_idx >= FLOW_N_REGS) {
821 ovs_fatal(0, "only %d registers supported", FLOW_N_REGS);
823 parse_reg_value(&fm->cr, reg_idx, value);
825 ovs_fatal(0, "unknown keyword %s", name);
831 /* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
832 * (one of OFPFC_*) and appends the parsed OpenFlow message to 'packets'.
833 * '*cur_format' should initially contain the flow format currently configured
834 * on the connection; this function will add a message to change the flow
835 * format and update '*cur_format', if this is necessary to add the parsed
838 parse_ofp_flow_mod_str(struct list *packets, enum nx_flow_format *cur_format,
839 char *string, uint16_t command)
841 bool is_del = command == OFPFC_DELETE || command == OFPFC_DELETE_STRICT;
842 enum nx_flow_format min_format, next_format;
843 struct ofpbuf actions;
847 ofpbuf_init(&actions, 64);
848 parse_ofp_str(&fm, NULL, is_del ? NULL : &actions, string);
849 fm.command = command;
851 min_format = ofputil_min_flow_format(&fm.cr, true, fm.cookie);
852 next_format = MAX(*cur_format, min_format);
853 if (next_format != *cur_format) {
854 struct ofpbuf *sff = ofputil_make_set_flow_format(next_format);
855 list_push_back(packets, &sff->list_node);
856 *cur_format = next_format;
859 ofm = ofputil_encode_flow_mod(&fm, *cur_format);
860 list_push_back(packets, &ofm->list_node);
862 ofpbuf_uninit(&actions);
865 /* Similar to parse_ofp_flow_mod_str(), except that the string is read from
866 * 'stream' and the command is always OFPFC_ADD. Returns false if end-of-file
867 * is reached before reading a flow, otherwise true. */
869 parse_ofp_add_flow_file(struct list *packets, enum nx_flow_format *cur,
872 struct ds s = DS_EMPTY_INITIALIZER;
875 while (!ds_get_line(&s, stream)) {
876 char *line = ds_cstr(&s);
879 /* Delete comments. */
880 comment = strchr(line, '#');
885 /* Drop empty lines. */
886 if (line[strspn(line, " \t\n")] == '\0') {
890 parse_ofp_flow_mod_str(packets, cur, line, OFPFC_ADD);
900 parse_ofp_flow_stats_request_str(struct flow_stats_request *fsr,
901 bool aggregate, char *string)
906 parse_ofp_str(&fm, &table_id, NULL, string);
907 fsr->aggregate = aggregate;
909 fsr->out_port = fm.out_port;
910 fsr->table_id = table_id;