2 * Copyright (c) 2008, 2009, 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.
18 #include "ofp-print.h"
21 #include <sys/types.h>
22 #include <netinet/in.h>
23 #include <netinet/icmp6.h>
27 #include "byte-order.h"
28 #include "classifier.h"
29 #include "dynamic-string.h"
31 #include "meta-flow.h"
32 #include "multipath.h"
35 #include "ofp-errors.h"
40 #include "unaligned.h"
41 #include "type-props.h"
44 VLOG_DEFINE_THIS_MODULE(ofp_util);
46 /* Rate limit for OpenFlow message parse errors. These always indicate a bug
47 * in the peer and so there's not much point in showing a lot of them. */
48 static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5);
50 /* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns
51 * an IP netmask with a 1 in each bit that must match and a 0 in each bit that
54 * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0
55 * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits,
56 * ..., 32 and higher wildcard the entire field. This is the *opposite* of the
57 * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are
60 ofputil_wcbits_to_netmask(int wcbits)
63 return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0;
66 /* Given the IP netmask 'netmask', returns the number of bits of the IP address
67 * that it wildcards, that is, the number of 0-bits in 'netmask'. 'netmask'
68 * must be a CIDR netmask (see ip_is_cidr()). */
70 ofputil_netmask_to_wcbits(ovs_be32 netmask)
72 return 32 - ip_count_cidr_bits(netmask);
75 /* A list of the FWW_* and OFPFW_ bits that have the same value, meaning, and
77 #define WC_INVARIANT_LIST \
78 WC_INVARIANT_BIT(IN_PORT) \
79 WC_INVARIANT_BIT(DL_SRC) \
80 WC_INVARIANT_BIT(DL_DST) \
81 WC_INVARIANT_BIT(DL_TYPE) \
82 WC_INVARIANT_BIT(NW_PROTO)
84 /* Verify that all of the invariant bits (as defined on WC_INVARIANT_LIST)
85 * actually have the same names and values. */
86 #define WC_INVARIANT_BIT(NAME) BUILD_ASSERT_DECL(FWW_##NAME == OFPFW_##NAME);
88 #undef WC_INVARIANT_BIT
90 /* WC_INVARIANTS is the invariant bits (as defined on WC_INVARIANT_LIST) all
92 static const flow_wildcards_t WC_INVARIANTS = 0
93 #define WC_INVARIANT_BIT(NAME) | FWW_##NAME
95 #undef WC_INVARIANT_BIT
98 /* Converts the wildcard in 'ofpfw' into a flow_wildcards in 'wc' for use in
99 * struct cls_rule. It is the caller's responsibility to handle the special
100 * case where the flow match's dl_vlan is set to OFP_VLAN_NONE. */
102 ofputil_wildcard_from_openflow(uint32_t ofpfw, struct flow_wildcards *wc)
104 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 10);
106 /* Initialize most of rule->wc. */
107 flow_wildcards_init_catchall(wc);
108 wc->wildcards = (OVS_FORCE flow_wildcards_t) ofpfw & WC_INVARIANTS;
110 /* Wildcard fields that aren't defined by ofp_match or tun_id. */
111 wc->wildcards |= (FWW_ARP_SHA | FWW_ARP_THA | FWW_NW_ECN | FWW_NW_TTL
114 if (ofpfw & OFPFW_NW_TOS) {
115 /* OpenFlow 1.0 defines a TOS wildcard, but it's much later in
116 * the enum than we can use. */
117 wc->wildcards |= FWW_NW_DSCP;
120 wc->nw_src_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_SRC_SHIFT);
121 wc->nw_dst_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_DST_SHIFT);
123 if (!(ofpfw & OFPFW_TP_SRC)) {
124 wc->tp_src_mask = htons(UINT16_MAX);
126 if (!(ofpfw & OFPFW_TP_DST)) {
127 wc->tp_dst_mask = htons(UINT16_MAX);
130 if (ofpfw & OFPFW_DL_DST) {
131 /* OpenFlow 1.0 OFPFW_DL_DST covers the whole Ethernet destination, but
132 * Open vSwitch breaks the Ethernet destination into bits as FWW_DL_DST
133 * and FWW_ETH_MCAST. */
134 wc->wildcards |= FWW_ETH_MCAST;
138 if (!(ofpfw & OFPFW_DL_VLAN_PCP)) {
139 wc->vlan_tci_mask |= htons(VLAN_PCP_MASK | VLAN_CFI);
141 if (!(ofpfw & OFPFW_DL_VLAN)) {
142 wc->vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI);
146 /* Converts the ofp_match in 'match' into a cls_rule in 'rule', with the given
149 ofputil_cls_rule_from_match(const struct ofp_match *match,
150 unsigned int priority, struct cls_rule *rule)
152 uint32_t ofpfw = ntohl(match->wildcards) & OFPFW_ALL;
154 /* Initialize rule->priority, rule->wc. */
155 rule->priority = !ofpfw ? UINT16_MAX : priority;
156 ofputil_wildcard_from_openflow(ofpfw, &rule->wc);
158 /* Initialize most of rule->flow. */
159 rule->flow.nw_src = match->nw_src;
160 rule->flow.nw_dst = match->nw_dst;
161 rule->flow.in_port = ntohs(match->in_port);
162 rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type);
163 rule->flow.tp_src = match->tp_src;
164 rule->flow.tp_dst = match->tp_dst;
165 memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN);
166 memcpy(rule->flow.dl_dst, match->dl_dst, ETH_ADDR_LEN);
167 rule->flow.nw_tos = match->nw_tos & IP_DSCP_MASK;
168 rule->flow.nw_proto = match->nw_proto;
170 /* Translate VLANs. */
171 if (!(ofpfw & OFPFW_DL_VLAN) && match->dl_vlan == htons(OFP_VLAN_NONE)) {
172 /* Match only packets without 802.1Q header.
174 * When OFPFW_DL_VLAN_PCP is wildcarded, this is obviously correct.
176 * If OFPFW_DL_VLAN_PCP is matched, the flow match is contradictory,
177 * because we can't have a specific PCP without an 802.1Q header.
178 * However, older versions of OVS treated this as matching packets
179 * withut an 802.1Q header, so we do here too. */
180 rule->flow.vlan_tci = htons(0);
181 rule->wc.vlan_tci_mask = htons(0xffff);
183 ovs_be16 vid, pcp, tci;
185 vid = match->dl_vlan & htons(VLAN_VID_MASK);
186 pcp = htons((match->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK);
187 tci = vid | pcp | htons(VLAN_CFI);
188 rule->flow.vlan_tci = tci & rule->wc.vlan_tci_mask;
192 cls_rule_zero_wildcarded_fields(rule);
195 /* Convert 'rule' into the OpenFlow match structure 'match'. */
197 ofputil_cls_rule_to_match(const struct cls_rule *rule, struct ofp_match *match)
199 const struct flow_wildcards *wc = &rule->wc;
202 /* Figure out most OpenFlow wildcards. */
203 ofpfw = (OVS_FORCE uint32_t) (wc->wildcards & WC_INVARIANTS);
204 ofpfw |= ofputil_netmask_to_wcbits(wc->nw_src_mask) << OFPFW_NW_SRC_SHIFT;
205 ofpfw |= ofputil_netmask_to_wcbits(wc->nw_dst_mask) << OFPFW_NW_DST_SHIFT;
206 if (wc->wildcards & FWW_NW_DSCP) {
207 ofpfw |= OFPFW_NW_TOS;
209 if (!wc->tp_src_mask) {
210 ofpfw |= OFPFW_TP_SRC;
212 if (!wc->tp_dst_mask) {
213 ofpfw |= OFPFW_TP_DST;
216 /* Translate VLANs. */
217 match->dl_vlan = htons(0);
218 match->dl_vlan_pcp = 0;
219 if (rule->wc.vlan_tci_mask == htons(0)) {
220 ofpfw |= OFPFW_DL_VLAN | OFPFW_DL_VLAN_PCP;
221 } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI)
222 && !(rule->flow.vlan_tci & htons(VLAN_CFI))) {
223 match->dl_vlan = htons(OFP_VLAN_NONE);
225 if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) {
226 ofpfw |= OFPFW_DL_VLAN;
228 match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci));
231 if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) {
232 ofpfw |= OFPFW_DL_VLAN_PCP;
234 match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci);
238 /* Compose most of the match structure. */
239 match->wildcards = htonl(ofpfw);
240 match->in_port = htons(rule->flow.in_port);
241 memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
242 memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
243 match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
244 match->nw_src = rule->flow.nw_src;
245 match->nw_dst = rule->flow.nw_dst;
246 match->nw_tos = rule->flow.nw_tos & IP_DSCP_MASK;
247 match->nw_proto = rule->flow.nw_proto;
248 match->tp_src = rule->flow.tp_src;
249 match->tp_dst = rule->flow.tp_dst;
250 memset(match->pad1, '\0', sizeof match->pad1);
251 memset(match->pad2, '\0', sizeof match->pad2);
254 /* Given a 'dl_type' value in the format used in struct flow, returns the
255 * corresponding 'dl_type' value for use in an OpenFlow ofp_match structure. */
257 ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type)
259 return (flow_dl_type == htons(FLOW_DL_TYPE_NONE)
260 ? htons(OFP_DL_TYPE_NOT_ETH_TYPE)
264 /* Given a 'dl_type' value in the format used in an OpenFlow ofp_match
265 * structure, returns the corresponding 'dl_type' value for use in struct
268 ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type)
270 return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)
271 ? htons(FLOW_DL_TYPE_NONE)
275 /* Returns a transaction ID to use for an outgoing OpenFlow message. */
279 static uint32_t next_xid = 1;
280 return htonl(next_xid++);
283 /* Basic parsing of OpenFlow messages. */
285 struct ofputil_msg_type {
286 enum ofputil_msg_code code; /* OFPUTIL_*. */
287 uint8_t ofp_version; /* An OpenFlow version or 0 for "any". */
288 uint32_t value; /* OFPT_*, OFPST_*, NXT_*, or NXST_*. */
289 const char *name; /* e.g. "OFPT_FLOW_REMOVED". */
290 unsigned int min_size; /* Minimum total message size in bytes. */
291 /* 0 if 'min_size' is the exact size that the message must be. Otherwise,
292 * the message may exceed 'min_size' by an even multiple of this value. */
293 unsigned int extra_multiple;
296 /* Represents a malformed OpenFlow message. */
297 static const struct ofputil_msg_type ofputil_invalid_type = {
298 OFPUTIL_MSG_INVALID, 0, 0, "OFPUTIL_MSG_INVALID", 0, 0
301 struct ofputil_msg_category {
302 const char *name; /* e.g. "OpenFlow message" */
303 const struct ofputil_msg_type *types;
305 enum ofperr missing_error; /* Error value for missing type. */
309 ofputil_check_length(const struct ofputil_msg_type *type, unsigned int size)
311 switch (type->extra_multiple) {
313 if (size != type->min_size) {
314 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
315 "length %u (expected length %u)",
316 type->name, size, type->min_size);
317 return OFPERR_OFPBRC_BAD_LEN;
322 if (size < type->min_size) {
323 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
324 "length %u (expected length at least %u bytes)",
325 type->name, size, type->min_size);
326 return OFPERR_OFPBRC_BAD_LEN;
331 if (size < type->min_size
332 || (size - type->min_size) % type->extra_multiple) {
333 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
334 "length %u (must be exactly %u bytes or longer "
335 "by an integer multiple of %u bytes)",
337 type->min_size, type->extra_multiple);
338 return OFPERR_OFPBRC_BAD_LEN;
345 ofputil_lookup_openflow_message(const struct ofputil_msg_category *cat,
346 uint8_t version, uint32_t value,
347 const struct ofputil_msg_type **typep)
349 const struct ofputil_msg_type *type;
351 for (type = cat->types; type < &cat->types[cat->n_types]; type++) {
352 if (type->value == value
353 && (!type->ofp_version || version == type->ofp_version)) {
359 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s of unknown type %"PRIu32,
361 return cat->missing_error;
365 ofputil_decode_vendor(const struct ofp_header *oh, size_t length,
366 const struct ofputil_msg_type **typep)
368 static const struct ofputil_msg_type nxt_messages[] = {
369 { OFPUTIL_NXT_ROLE_REQUEST, OFP10_VERSION,
370 NXT_ROLE_REQUEST, "NXT_ROLE_REQUEST",
371 sizeof(struct nx_role_request), 0 },
373 { OFPUTIL_NXT_ROLE_REPLY, OFP10_VERSION,
374 NXT_ROLE_REPLY, "NXT_ROLE_REPLY",
375 sizeof(struct nx_role_request), 0 },
377 { OFPUTIL_NXT_SET_FLOW_FORMAT, OFP10_VERSION,
378 NXT_SET_FLOW_FORMAT, "NXT_SET_FLOW_FORMAT",
379 sizeof(struct nx_set_flow_format), 0 },
381 { OFPUTIL_NXT_SET_PACKET_IN_FORMAT, OFP10_VERSION,
382 NXT_SET_PACKET_IN_FORMAT, "NXT_SET_PACKET_IN_FORMAT",
383 sizeof(struct nx_set_packet_in_format), 0 },
385 { OFPUTIL_NXT_PACKET_IN, OFP10_VERSION,
386 NXT_PACKET_IN, "NXT_PACKET_IN",
387 sizeof(struct nx_packet_in), 1 },
389 { OFPUTIL_NXT_FLOW_MOD, OFP10_VERSION,
390 NXT_FLOW_MOD, "NXT_FLOW_MOD",
391 sizeof(struct nx_flow_mod), 8 },
393 { OFPUTIL_NXT_FLOW_REMOVED, OFP10_VERSION,
394 NXT_FLOW_REMOVED, "NXT_FLOW_REMOVED",
395 sizeof(struct nx_flow_removed), 8 },
397 { OFPUTIL_NXT_FLOW_MOD_TABLE_ID, OFP10_VERSION,
398 NXT_FLOW_MOD_TABLE_ID, "NXT_FLOW_MOD_TABLE_ID",
399 sizeof(struct nx_flow_mod_table_id), 0 },
401 { OFPUTIL_NXT_FLOW_AGE, OFP10_VERSION,
402 NXT_FLOW_AGE, "NXT_FLOW_AGE",
403 sizeof(struct nicira_header), 0 },
405 { OFPUTIL_NXT_SET_ASYNC_CONFIG, OFP10_VERSION,
406 NXT_SET_ASYNC_CONFIG, "NXT_SET_ASYNC_CONFIG",
407 sizeof(struct nx_async_config), 0 },
409 { OFPUTIL_NXT_SET_CONTROLLER_ID, OFP10_VERSION,
410 NXT_SET_CONTROLLER_ID, "NXT_SET_CONTROLLER_ID",
411 sizeof(struct nx_controller_id), 0 },
414 static const struct ofputil_msg_category nxt_category = {
415 "Nicira extension message",
416 nxt_messages, ARRAY_SIZE(nxt_messages),
417 OFPERR_OFPBRC_BAD_SUBTYPE
420 const struct ofp_vendor_header *ovh;
421 const struct nicira_header *nh;
423 if (length < sizeof(struct ofp_vendor_header)) {
424 if (length == ntohs(oh->length)) {
425 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor message");
427 return OFPERR_OFPBRC_BAD_LEN;
430 ovh = (const struct ofp_vendor_header *) oh;
431 if (ovh->vendor != htonl(NX_VENDOR_ID)) {
432 VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor message for unknown "
433 "vendor %"PRIx32, ntohl(ovh->vendor));
434 return OFPERR_OFPBRC_BAD_VENDOR;
437 if (length < sizeof(struct nicira_header)) {
438 if (length == ntohs(oh->length)) {
439 VLOG_WARN_RL(&bad_ofmsg_rl, "received Nicira vendor message of "
440 "length %u (expected at least %zu)",
441 ntohs(ovh->header.length),
442 sizeof(struct nicira_header));
444 return OFPERR_OFPBRC_BAD_LEN;
447 nh = (const struct nicira_header *) oh;
448 return ofputil_lookup_openflow_message(&nxt_category, oh->version,
449 ntohl(nh->subtype), typep);
453 check_nxstats_msg(const struct ofp_header *oh, size_t length)
455 const struct ofp_stats_msg *osm = (const struct ofp_stats_msg *) oh;
458 if (length < sizeof(struct ofp_vendor_stats_msg)) {
459 if (length == ntohs(oh->length)) {
460 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor stats message");
462 return OFPERR_OFPBRC_BAD_LEN;
465 memcpy(&vendor, osm + 1, sizeof vendor);
466 if (vendor != htonl(NX_VENDOR_ID)) {
467 VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor stats message for "
468 "unknown vendor %"PRIx32, ntohl(vendor));
469 return OFPERR_OFPBRC_BAD_VENDOR;
472 if (length < sizeof(struct nicira_stats_msg)) {
473 if (length == ntohs(osm->header.length)) {
474 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated Nicira stats message");
476 return OFPERR_OFPBRC_BAD_LEN;
483 ofputil_decode_nxst_request(const struct ofp_header *oh, size_t length,
484 const struct ofputil_msg_type **typep)
486 static const struct ofputil_msg_type nxst_requests[] = {
487 { OFPUTIL_NXST_FLOW_REQUEST, OFP10_VERSION,
488 NXST_FLOW, "NXST_FLOW request",
489 sizeof(struct nx_flow_stats_request), 8 },
491 { OFPUTIL_NXST_AGGREGATE_REQUEST, OFP10_VERSION,
492 NXST_AGGREGATE, "NXST_AGGREGATE request",
493 sizeof(struct nx_aggregate_stats_request), 8 },
496 static const struct ofputil_msg_category nxst_request_category = {
497 "Nicira extension statistics request",
498 nxst_requests, ARRAY_SIZE(nxst_requests),
499 OFPERR_OFPBRC_BAD_SUBTYPE
502 const struct nicira_stats_msg *nsm;
505 error = check_nxstats_msg(oh, length);
510 nsm = (struct nicira_stats_msg *) oh;
511 return ofputil_lookup_openflow_message(&nxst_request_category, oh->version,
512 ntohl(nsm->subtype), typep);
516 ofputil_decode_nxst_reply(const struct ofp_header *oh, size_t length,
517 const struct ofputil_msg_type **typep)
519 static const struct ofputil_msg_type nxst_replies[] = {
520 { OFPUTIL_NXST_FLOW_REPLY, OFP10_VERSION,
521 NXST_FLOW, "NXST_FLOW reply",
522 sizeof(struct nicira_stats_msg), 8 },
524 { OFPUTIL_NXST_AGGREGATE_REPLY, OFP10_VERSION,
525 NXST_AGGREGATE, "NXST_AGGREGATE reply",
526 sizeof(struct nx_aggregate_stats_reply), 0 },
529 static const struct ofputil_msg_category nxst_reply_category = {
530 "Nicira extension statistics reply",
531 nxst_replies, ARRAY_SIZE(nxst_replies),
532 OFPERR_OFPBRC_BAD_SUBTYPE
535 const struct nicira_stats_msg *nsm;
538 error = check_nxstats_msg(oh, length);
543 nsm = (struct nicira_stats_msg *) oh;
544 return ofputil_lookup_openflow_message(&nxst_reply_category, oh->version,
545 ntohl(nsm->subtype), typep);
549 check_stats_msg(const struct ofp_header *oh, size_t length)
551 if (length < sizeof(struct ofp_stats_msg)) {
552 if (length == ntohs(oh->length)) {
553 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated stats message");
555 return OFPERR_OFPBRC_BAD_LEN;
562 ofputil_decode_ofpst_request(const struct ofp_header *oh, size_t length,
563 const struct ofputil_msg_type **typep)
565 static const struct ofputil_msg_type ofpst_requests[] = {
566 { OFPUTIL_OFPST_DESC_REQUEST, OFP10_VERSION,
567 OFPST_DESC, "OFPST_DESC request",
568 sizeof(struct ofp_stats_msg), 0 },
570 { OFPUTIL_OFPST_FLOW_REQUEST, OFP10_VERSION,
571 OFPST_FLOW, "OFPST_FLOW request",
572 sizeof(struct ofp_flow_stats_request), 0 },
574 { OFPUTIL_OFPST_AGGREGATE_REQUEST, OFP10_VERSION,
575 OFPST_AGGREGATE, "OFPST_AGGREGATE request",
576 sizeof(struct ofp_flow_stats_request), 0 },
578 { OFPUTIL_OFPST_TABLE_REQUEST, OFP10_VERSION,
579 OFPST_TABLE, "OFPST_TABLE request",
580 sizeof(struct ofp_stats_msg), 0 },
582 { OFPUTIL_OFPST_PORT_REQUEST, OFP10_VERSION,
583 OFPST_PORT, "OFPST_PORT request",
584 sizeof(struct ofp_port_stats_request), 0 },
586 { OFPUTIL_OFPST_QUEUE_REQUEST, OFP10_VERSION,
587 OFPST_QUEUE, "OFPST_QUEUE request",
588 sizeof(struct ofp_queue_stats_request), 0 },
590 { OFPUTIL_OFPST_PORT_DESC_REQUEST, OFP10_VERSION,
591 OFPST_PORT_DESC, "OFPST_PORT_DESC request",
592 sizeof(struct ofp_stats_msg), 0 },
595 OFPST_VENDOR, "OFPST_VENDOR request",
596 sizeof(struct ofp_vendor_stats_msg), 1 },
599 static const struct ofputil_msg_category ofpst_request_category = {
600 "OpenFlow statistics",
601 ofpst_requests, ARRAY_SIZE(ofpst_requests),
602 OFPERR_OFPBRC_BAD_STAT
605 const struct ofp_stats_msg *request = (const struct ofp_stats_msg *) oh;
608 error = check_stats_msg(oh, length);
613 error = ofputil_lookup_openflow_message(&ofpst_request_category,
614 oh->version, ntohs(request->type),
616 if (!error && request->type == htons(OFPST_VENDOR)) {
617 error = ofputil_decode_nxst_request(oh, length, typep);
623 ofputil_decode_ofpst_reply(const struct ofp_header *oh, size_t length,
624 const struct ofputil_msg_type **typep)
626 static const struct ofputil_msg_type ofpst_replies[] = {
627 { OFPUTIL_OFPST_DESC_REPLY, OFP10_VERSION,
628 OFPST_DESC, "OFPST_DESC reply",
629 sizeof(struct ofp_desc_stats), 0 },
631 { OFPUTIL_OFPST_FLOW_REPLY, OFP10_VERSION,
632 OFPST_FLOW, "OFPST_FLOW reply",
633 sizeof(struct ofp_stats_msg), 1 },
635 { OFPUTIL_OFPST_AGGREGATE_REPLY, OFP10_VERSION,
636 OFPST_AGGREGATE, "OFPST_AGGREGATE reply",
637 sizeof(struct ofp_aggregate_stats_reply), 0 },
639 { OFPUTIL_OFPST_TABLE_REPLY, OFP10_VERSION,
640 OFPST_TABLE, "OFPST_TABLE reply",
641 sizeof(struct ofp_stats_msg), sizeof(struct ofp_table_stats) },
643 { OFPUTIL_OFPST_PORT_REPLY, OFP10_VERSION,
644 OFPST_PORT, "OFPST_PORT reply",
645 sizeof(struct ofp_stats_msg), sizeof(struct ofp_port_stats) },
647 { OFPUTIL_OFPST_QUEUE_REPLY, OFP10_VERSION,
648 OFPST_QUEUE, "OFPST_QUEUE reply",
649 sizeof(struct ofp_stats_msg), sizeof(struct ofp_queue_stats) },
651 { OFPUTIL_OFPST_PORT_DESC_REPLY, OFP10_VERSION,
652 OFPST_PORT_DESC, "OFPST_PORT_DESC reply",
653 sizeof(struct ofp_stats_msg), sizeof(struct ofp10_phy_port) },
656 OFPST_VENDOR, "OFPST_VENDOR reply",
657 sizeof(struct ofp_vendor_stats_msg), 1 },
660 static const struct ofputil_msg_category ofpst_reply_category = {
661 "OpenFlow statistics",
662 ofpst_replies, ARRAY_SIZE(ofpst_replies),
663 OFPERR_OFPBRC_BAD_STAT
666 const struct ofp_stats_msg *reply = (const struct ofp_stats_msg *) oh;
669 error = check_stats_msg(oh, length);
674 error = ofputil_lookup_openflow_message(&ofpst_reply_category, oh->version,
675 ntohs(reply->type), typep);
676 if (!error && reply->type == htons(OFPST_VENDOR)) {
677 error = ofputil_decode_nxst_reply(oh, length, typep);
683 ofputil_decode_msg_type__(const struct ofp_header *oh, size_t length,
684 const struct ofputil_msg_type **typep)
686 static const struct ofputil_msg_type ofpt_messages[] = {
687 { OFPUTIL_OFPT_HELLO, OFP10_VERSION,
688 OFPT_HELLO, "OFPT_HELLO",
689 sizeof(struct ofp_hello), 1 },
691 { OFPUTIL_OFPT_ERROR, 0,
692 OFPT_ERROR, "OFPT_ERROR",
693 sizeof(struct ofp_error_msg), 1 },
695 { OFPUTIL_OFPT_ECHO_REQUEST, OFP10_VERSION,
696 OFPT_ECHO_REQUEST, "OFPT_ECHO_REQUEST",
697 sizeof(struct ofp_header), 1 },
699 { OFPUTIL_OFPT_ECHO_REPLY, OFP10_VERSION,
700 OFPT_ECHO_REPLY, "OFPT_ECHO_REPLY",
701 sizeof(struct ofp_header), 1 },
703 { OFPUTIL_OFPT_FEATURES_REQUEST, OFP10_VERSION,
704 OFPT_FEATURES_REQUEST, "OFPT_FEATURES_REQUEST",
705 sizeof(struct ofp_header), 0 },
707 { OFPUTIL_OFPT_FEATURES_REPLY, OFP10_VERSION,
708 OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY",
709 sizeof(struct ofp_switch_features), sizeof(struct ofp10_phy_port) },
710 { OFPUTIL_OFPT_FEATURES_REPLY, OFP11_VERSION,
711 OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY",
712 sizeof(struct ofp_switch_features), sizeof(struct ofp11_port) },
714 { OFPUTIL_OFPT_GET_CONFIG_REQUEST, OFP10_VERSION,
715 OFPT_GET_CONFIG_REQUEST, "OFPT_GET_CONFIG_REQUEST",
716 sizeof(struct ofp_header), 0 },
718 { OFPUTIL_OFPT_GET_CONFIG_REPLY, OFP10_VERSION,
719 OFPT_GET_CONFIG_REPLY, "OFPT_GET_CONFIG_REPLY",
720 sizeof(struct ofp_switch_config), 0 },
722 { OFPUTIL_OFPT_SET_CONFIG, OFP10_VERSION,
723 OFPT_SET_CONFIG, "OFPT_SET_CONFIG",
724 sizeof(struct ofp_switch_config), 0 },
726 { OFPUTIL_OFPT_PACKET_IN, OFP10_VERSION,
727 OFPT_PACKET_IN, "OFPT_PACKET_IN",
728 offsetof(struct ofp_packet_in, data), 1 },
730 { OFPUTIL_OFPT_FLOW_REMOVED, OFP10_VERSION,
731 OFPT_FLOW_REMOVED, "OFPT_FLOW_REMOVED",
732 sizeof(struct ofp_flow_removed), 0 },
734 { OFPUTIL_OFPT_PORT_STATUS, OFP10_VERSION,
735 OFPT_PORT_STATUS, "OFPT_PORT_STATUS",
736 sizeof(struct ofp_port_status) + sizeof(struct ofp10_phy_port), 0 },
737 { OFPUTIL_OFPT_PORT_STATUS, OFP11_VERSION,
738 OFPT_PORT_STATUS, "OFPT_PORT_STATUS",
739 sizeof(struct ofp_port_status) + sizeof(struct ofp11_port), 0 },
741 { OFPUTIL_OFPT_PACKET_OUT, OFP10_VERSION,
742 OFPT10_PACKET_OUT, "OFPT_PACKET_OUT",
743 sizeof(struct ofp_packet_out), 1 },
745 { OFPUTIL_OFPT_FLOW_MOD, OFP10_VERSION,
746 OFPT10_FLOW_MOD, "OFPT_FLOW_MOD",
747 sizeof(struct ofp_flow_mod), 1 },
749 { OFPUTIL_OFPT_PORT_MOD, OFP10_VERSION,
750 OFPT10_PORT_MOD, "OFPT_PORT_MOD",
751 sizeof(struct ofp10_port_mod), 0 },
752 { OFPUTIL_OFPT_PORT_MOD, OFP11_VERSION,
753 OFPT11_PORT_MOD, "OFPT_PORT_MOD",
754 sizeof(struct ofp11_port_mod), 0 },
757 OFPT10_STATS_REQUEST, "OFPT_STATS_REQUEST",
758 sizeof(struct ofp_stats_msg), 1 },
761 OFPT10_STATS_REPLY, "OFPT_STATS_REPLY",
762 sizeof(struct ofp_stats_msg), 1 },
764 { OFPUTIL_OFPT_BARRIER_REQUEST, OFP10_VERSION,
765 OFPT10_BARRIER_REQUEST, "OFPT_BARRIER_REQUEST",
766 sizeof(struct ofp_header), 0 },
768 { OFPUTIL_OFPT_BARRIER_REPLY, OFP10_VERSION,
769 OFPT10_BARRIER_REPLY, "OFPT_BARRIER_REPLY",
770 sizeof(struct ofp_header), 0 },
773 OFPT_VENDOR, "OFPT_VENDOR",
774 sizeof(struct ofp_vendor_header), 1 },
777 static const struct ofputil_msg_category ofpt_category = {
779 ofpt_messages, ARRAY_SIZE(ofpt_messages),
780 OFPERR_OFPBRC_BAD_TYPE
785 error = ofputil_lookup_openflow_message(&ofpt_category, oh->version,
788 switch ((oh->version << 8) | oh->type) {
789 case (OFP10_VERSION << 8) | OFPT_VENDOR:
790 case (OFP11_VERSION << 8) | OFPT_VENDOR:
791 error = ofputil_decode_vendor(oh, length, typep);
794 case (OFP10_VERSION << 8) | OFPT10_STATS_REQUEST:
795 case (OFP11_VERSION << 8) | OFPT11_STATS_REQUEST:
796 error = ofputil_decode_ofpst_request(oh, length, typep);
799 case (OFP10_VERSION << 8) | OFPT10_STATS_REPLY:
800 case (OFP11_VERSION << 8) | OFPT11_STATS_REPLY:
801 error = ofputil_decode_ofpst_reply(oh, length, typep);
810 /* Decodes the message type represented by 'oh'. Returns 0 if successful or an
811 * OpenFlow error code on failure. Either way, stores in '*typep' a type
812 * structure that can be inspected with the ofputil_msg_type_*() functions.
814 * oh->length must indicate the correct length of the message (and must be at
815 * least sizeof(struct ofp_header)).
817 * Success indicates that 'oh' is at least as long as the minimum-length
818 * message of its type. */
820 ofputil_decode_msg_type(const struct ofp_header *oh,
821 const struct ofputil_msg_type **typep)
823 size_t length = ntohs(oh->length);
826 error = ofputil_decode_msg_type__(oh, length, typep);
828 error = ofputil_check_length(*typep, length);
831 *typep = &ofputil_invalid_type;
836 /* Decodes the message type represented by 'oh', of which only the first
837 * 'length' bytes are available. Returns 0 if successful or an OpenFlow error
838 * code on failure. Either way, stores in '*typep' a type structure that can
839 * be inspected with the ofputil_msg_type_*() functions. */
841 ofputil_decode_msg_type_partial(const struct ofp_header *oh, size_t length,
842 const struct ofputil_msg_type **typep)
846 error = (length >= sizeof *oh
847 ? ofputil_decode_msg_type__(oh, length, typep)
848 : OFPERR_OFPBRC_BAD_LEN);
850 *typep = &ofputil_invalid_type;
855 /* Returns an OFPUTIL_* message type code for 'type'. */
856 enum ofputil_msg_code
857 ofputil_msg_type_code(const struct ofputil_msg_type *type)
864 struct proto_abbrev {
865 enum ofputil_protocol protocol;
869 /* Most users really don't care about some of the differences between
870 * protocols. These abbreviations help with that. */
871 static const struct proto_abbrev proto_abbrevs[] = {
872 { OFPUTIL_P_ANY, "any" },
873 { OFPUTIL_P_OF10_ANY, "OpenFlow10" },
874 { OFPUTIL_P_NXM_ANY, "NXM" },
876 #define N_PROTO_ABBREVS ARRAY_SIZE(proto_abbrevs)
878 enum ofputil_protocol ofputil_flow_dump_protocols[] = {
882 size_t ofputil_n_flow_dump_protocols = ARRAY_SIZE(ofputil_flow_dump_protocols);
884 /* Returns the ofputil_protocol that is initially in effect on an OpenFlow
885 * connection that has negotiated the given 'version'. 'version' should
886 * normally be an 8-bit OpenFlow version identifier (e.g. 0x01 for OpenFlow
887 * 1.0, 0x02 for OpenFlow 1.1). Returns 0 if 'version' is not supported or
888 * outside the valid range. */
889 enum ofputil_protocol
890 ofputil_protocol_from_ofp_version(int version)
893 case OFP10_VERSION: return OFPUTIL_P_OF10;
898 /* Returns the OpenFlow protocol version number (e.g. OFP10_VERSION or
899 * OFP11_VERSION) that corresponds to 'protocol'. */
901 ofputil_protocol_to_ofp_version(enum ofputil_protocol protocol)
905 case OFPUTIL_P_OF10_TID:
907 case OFPUTIL_P_NXM_TID:
908 return OFP10_VERSION;
914 /* Returns true if 'protocol' is a single OFPUTIL_P_* value, false
917 ofputil_protocol_is_valid(enum ofputil_protocol protocol)
919 return protocol & OFPUTIL_P_ANY && is_pow2(protocol);
922 /* Returns the equivalent of 'protocol' with the Nicira flow_mod_table_id
923 * extension turned on or off if 'enable' is true or false, respectively.
925 * This extension is only useful for protocols whose "standard" version does
926 * not allow specific tables to be modified. In particular, this is true of
927 * OpenFlow 1.0. In later versions of OpenFlow, a flow_mod request always
928 * specifies a table ID and so there is no need for such an extension. When
929 * 'protocol' is such a protocol that doesn't need a flow_mod_table_id
930 * extension, this function just returns its 'protocol' argument unchanged
931 * regardless of the value of 'enable'. */
932 enum ofputil_protocol
933 ofputil_protocol_set_tid(enum ofputil_protocol protocol, bool enable)
937 case OFPUTIL_P_OF10_TID:
938 return enable ? OFPUTIL_P_OF10_TID : OFPUTIL_P_OF10;
941 case OFPUTIL_P_NXM_TID:
942 return enable ? OFPUTIL_P_NXM_TID : OFPUTIL_P_NXM;
949 /* Returns the "base" version of 'protocol'. That is, if 'protocol' includes
950 * some extension to a standard protocol version, the return value is the
951 * standard version of that protocol without any extension. If 'protocol' is a
952 * standard protocol version, returns 'protocol' unchanged. */
953 enum ofputil_protocol
954 ofputil_protocol_to_base(enum ofputil_protocol protocol)
956 return ofputil_protocol_set_tid(protocol, false);
959 /* Returns 'new_base' with any extensions taken from 'cur'. */
960 enum ofputil_protocol
961 ofputil_protocol_set_base(enum ofputil_protocol cur,
962 enum ofputil_protocol new_base)
964 bool tid = (cur & OFPUTIL_P_TID) != 0;
968 case OFPUTIL_P_OF10_TID:
969 return ofputil_protocol_set_tid(OFPUTIL_P_OF10, tid);
972 case OFPUTIL_P_NXM_TID:
973 return ofputil_protocol_set_tid(OFPUTIL_P_NXM, tid);
980 /* Returns a string form of 'protocol', if a simple form exists (that is, if
981 * 'protocol' is either a single protocol or it is a combination of protocols
982 * that have a single abbreviation). Otherwise, returns NULL. */
984 ofputil_protocol_to_string(enum ofputil_protocol protocol)
986 const struct proto_abbrev *p;
988 /* Use a "switch" statement for single-bit names so that we get a compiler
989 * warning if we forget any. */
992 return "NXM-table_id";
994 case OFPUTIL_P_NXM_TID:
995 return "NXM+table_id";
998 return "OpenFlow10-table_id";
1000 case OFPUTIL_P_OF10_TID:
1001 return "OpenFlow10+table_id";
1004 /* Check abbreviations. */
1005 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
1006 if (protocol == p->protocol) {
1014 /* Returns a string that represents 'protocols'. The return value might be a
1015 * comma-separated list if 'protocols' doesn't have a simple name. The return
1016 * value is "none" if 'protocols' is 0.
1018 * The caller must free the returned string (with free()). */
1020 ofputil_protocols_to_string(enum ofputil_protocol protocols)
1024 assert(!(protocols & ~OFPUTIL_P_ANY));
1025 if (protocols == 0) {
1026 return xstrdup("none");
1031 const struct proto_abbrev *p;
1035 ds_put_char(&s, ',');
1038 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
1039 if ((protocols & p->protocol) == p->protocol) {
1040 ds_put_cstr(&s, p->name);
1041 protocols &= ~p->protocol;
1046 for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
1047 enum ofputil_protocol bit = 1u << i;
1049 if (protocols & bit) {
1050 ds_put_cstr(&s, ofputil_protocol_to_string(bit));
1059 return ds_steal_cstr(&s);
1062 static enum ofputil_protocol
1063 ofputil_protocol_from_string__(const char *s, size_t n)
1065 const struct proto_abbrev *p;
1068 for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
1069 enum ofputil_protocol bit = 1u << i;
1070 const char *name = ofputil_protocol_to_string(bit);
1072 if (name && n == strlen(name) && !strncasecmp(s, name, n)) {
1077 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
1078 if (n == strlen(p->name) && !strncasecmp(s, p->name, n)) {
1086 /* Returns the nonempty set of protocols represented by 's', which can be a
1087 * single protocol name or abbreviation or a comma-separated list of them.
1089 * Aborts the program with an error message if 's' is invalid. */
1090 enum ofputil_protocol
1091 ofputil_protocols_from_string(const char *s)
1093 const char *orig_s = s;
1094 enum ofputil_protocol protocols;
1098 enum ofputil_protocol p;
1101 n = strcspn(s, ",");
1107 p = ofputil_protocol_from_string__(s, n);
1109 ovs_fatal(0, "%.*s: unknown flow protocol", (int) n, s);
1117 ovs_fatal(0, "%s: no flow protocol specified", orig_s);
1123 ofputil_packet_in_format_is_valid(enum nx_packet_in_format packet_in_format)
1125 switch (packet_in_format) {
1126 case NXPIF_OPENFLOW10:
1135 ofputil_packet_in_format_to_string(enum nx_packet_in_format packet_in_format)
1137 switch (packet_in_format) {
1138 case NXPIF_OPENFLOW10:
1139 return "openflow10";
1148 ofputil_packet_in_format_from_string(const char *s)
1150 return (!strcmp(s, "openflow10") ? NXPIF_OPENFLOW10
1151 : !strcmp(s, "nxm") ? NXPIF_NXM
1156 regs_fully_wildcarded(const struct flow_wildcards *wc)
1160 for (i = 0; i < FLOW_N_REGS; i++) {
1161 if (wc->reg_masks[i] != 0) {
1168 /* Returns a bit-mask of ofputil_protocols that can be used for sending 'rule'
1169 * to a switch (e.g. to add or remove a flow). Only NXM can handle tunnel IDs,
1170 * registers, or fixing the Ethernet multicast bit. Otherwise, it's better to
1171 * use OpenFlow 1.0 protocol for backward compatibility. */
1172 enum ofputil_protocol
1173 ofputil_usable_protocols(const struct cls_rule *rule)
1175 const struct flow_wildcards *wc = &rule->wc;
1177 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 10);
1179 /* Only NXM supports separately wildcards the Ethernet multicast bit. */
1180 if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)) {
1181 return OFPUTIL_P_NXM_ANY;
1184 /* Only NXM supports matching ARP hardware addresses. */
1185 if (!(wc->wildcards & FWW_ARP_SHA) || !(wc->wildcards & FWW_ARP_THA)) {
1186 return OFPUTIL_P_NXM_ANY;
1189 /* Only NXM supports matching IPv6 traffic. */
1190 if (!(wc->wildcards & FWW_DL_TYPE)
1191 && (rule->flow.dl_type == htons(ETH_TYPE_IPV6))) {
1192 return OFPUTIL_P_NXM_ANY;
1195 /* Only NXM supports matching registers. */
1196 if (!regs_fully_wildcarded(wc)) {
1197 return OFPUTIL_P_NXM_ANY;
1200 /* Only NXM supports matching tun_id. */
1201 if (wc->tun_id_mask != htonll(0)) {
1202 return OFPUTIL_P_NXM_ANY;
1205 /* Only NXM supports matching fragments. */
1206 if (wc->nw_frag_mask) {
1207 return OFPUTIL_P_NXM_ANY;
1210 /* Only NXM supports matching IPv6 flow label. */
1211 if (!(wc->wildcards & FWW_IPV6_LABEL)) {
1212 return OFPUTIL_P_NXM_ANY;
1215 /* Only NXM supports matching IP ECN bits. */
1216 if (!(wc->wildcards & FWW_NW_ECN)) {
1217 return OFPUTIL_P_NXM_ANY;
1220 /* Only NXM supports matching IP TTL/hop limit. */
1221 if (!(wc->wildcards & FWW_NW_TTL)) {
1222 return OFPUTIL_P_NXM_ANY;
1225 /* Only NXM supports bitwise matching on transport port. */
1226 if ((wc->tp_src_mask && wc->tp_src_mask != htons(UINT16_MAX)) ||
1227 (wc->tp_dst_mask && wc->tp_dst_mask != htons(UINT16_MAX))) {
1228 return OFPUTIL_P_NXM_ANY;
1231 /* Other formats can express this rule. */
1232 return OFPUTIL_P_ANY;
1235 /* Returns an OpenFlow message that, sent on an OpenFlow connection whose
1236 * protocol is 'current', at least partly transitions the protocol to 'want'.
1237 * Stores in '*next' the protocol that will be in effect on the OpenFlow
1238 * connection if the switch processes the returned message correctly. (If
1239 * '*next != want' then the caller will have to iterate.)
1241 * If 'current == want', returns NULL and stores 'current' in '*next'. */
1243 ofputil_encode_set_protocol(enum ofputil_protocol current,
1244 enum ofputil_protocol want,
1245 enum ofputil_protocol *next)
1247 enum ofputil_protocol cur_base, want_base;
1248 bool cur_tid, want_tid;
1250 cur_base = ofputil_protocol_to_base(current);
1251 want_base = ofputil_protocol_to_base(want);
1252 if (cur_base != want_base) {
1253 *next = ofputil_protocol_set_base(current, want_base);
1255 switch (want_base) {
1257 return ofputil_encode_nx_set_flow_format(NXFF_NXM);
1259 case OFPUTIL_P_OF10:
1260 return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW10);
1262 case OFPUTIL_P_OF10_TID:
1263 case OFPUTIL_P_NXM_TID:
1268 cur_tid = (current & OFPUTIL_P_TID) != 0;
1269 want_tid = (want & OFPUTIL_P_TID) != 0;
1270 if (cur_tid != want_tid) {
1271 *next = ofputil_protocol_set_tid(current, want_tid);
1272 return ofputil_make_flow_mod_table_id(want_tid);
1275 assert(current == want);
1281 /* Returns an NXT_SET_FLOW_FORMAT message that can be used to set the flow
1282 * format to 'nxff'. */
1284 ofputil_encode_nx_set_flow_format(enum nx_flow_format nxff)
1286 struct nx_set_flow_format *sff;
1289 assert(ofputil_nx_flow_format_is_valid(nxff));
1291 sff = make_nxmsg(sizeof *sff, NXT_SET_FLOW_FORMAT, &msg);
1292 sff->format = htonl(nxff);
1297 /* Returns the base protocol if 'flow_format' is a valid NXFF_* value, false
1299 enum ofputil_protocol
1300 ofputil_nx_flow_format_to_protocol(enum nx_flow_format flow_format)
1302 switch (flow_format) {
1303 case NXFF_OPENFLOW10:
1304 return OFPUTIL_P_OF10;
1307 return OFPUTIL_P_NXM;
1314 /* Returns true if 'flow_format' is a valid NXFF_* value, false otherwise. */
1316 ofputil_nx_flow_format_is_valid(enum nx_flow_format flow_format)
1318 return ofputil_nx_flow_format_to_protocol(flow_format) != 0;
1321 /* Returns a string version of 'flow_format', which must be a valid NXFF_*
1324 ofputil_nx_flow_format_to_string(enum nx_flow_format flow_format)
1326 switch (flow_format) {
1327 case NXFF_OPENFLOW10:
1328 return "openflow10";
1337 ofputil_make_set_packet_in_format(enum nx_packet_in_format packet_in_format)
1339 struct nx_set_packet_in_format *spif;
1342 spif = make_nxmsg(sizeof *spif, NXT_SET_PACKET_IN_FORMAT, &msg);
1343 spif->format = htonl(packet_in_format);
1348 /* Returns an OpenFlow message that can be used to turn the flow_mod_table_id
1349 * extension on or off (according to 'flow_mod_table_id'). */
1351 ofputil_make_flow_mod_table_id(bool flow_mod_table_id)
1353 struct nx_flow_mod_table_id *nfmti;
1356 nfmti = make_nxmsg(sizeof *nfmti, NXT_FLOW_MOD_TABLE_ID, &msg);
1357 nfmti->set = flow_mod_table_id;
1361 /* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract
1362 * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error
1365 * Does not validate the flow_mod actions. */
1367 ofputil_decode_flow_mod(struct ofputil_flow_mod *fm,
1368 const struct ofp_header *oh,
1369 enum ofputil_protocol protocol)
1371 const struct ofputil_msg_type *type;
1375 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1377 ofputil_decode_msg_type(oh, &type);
1378 if (ofputil_msg_type_code(type) == OFPUTIL_OFPT_FLOW_MOD) {
1379 /* Standard OpenFlow flow_mod. */
1380 const struct ofp_flow_mod *ofm;
1384 /* Dissect the message. */
1385 ofm = ofpbuf_pull(&b, sizeof *ofm);
1386 error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions);
1391 /* Set priority based on original wildcards. Normally we'd allow
1392 * ofputil_cls_rule_from_match() to do this for us, but
1393 * ofputil_normalize_rule() can put wildcards where the original flow
1394 * didn't have them. */
1395 priority = ntohs(ofm->priority);
1396 if (!(ofm->match.wildcards & htonl(OFPFW_ALL))) {
1397 priority = UINT16_MAX;
1400 /* Translate the rule. */
1401 ofputil_cls_rule_from_match(&ofm->match, priority, &fm->cr);
1402 ofputil_normalize_rule(&fm->cr);
1404 /* Translate the message. */
1405 fm->cookie = ofm->cookie;
1406 fm->cookie_mask = htonll(UINT64_MAX);
1407 command = ntohs(ofm->command);
1408 fm->idle_timeout = ntohs(ofm->idle_timeout);
1409 fm->hard_timeout = ntohs(ofm->hard_timeout);
1410 fm->buffer_id = ntohl(ofm->buffer_id);
1411 fm->out_port = ntohs(ofm->out_port);
1412 fm->flags = ntohs(ofm->flags);
1413 } else if (ofputil_msg_type_code(type) == OFPUTIL_NXT_FLOW_MOD) {
1414 /* Nicira extended flow_mod. */
1415 const struct nx_flow_mod *nfm;
1418 /* Dissect the message. */
1419 nfm = ofpbuf_pull(&b, sizeof *nfm);
1420 error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority),
1421 &fm->cr, &fm->cookie, &fm->cookie_mask);
1425 error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions);
1430 /* Translate the message. */
1431 command = ntohs(nfm->command);
1432 if (command == OFPFC_ADD) {
1433 if (fm->cookie_mask) {
1434 /* The "NXM_NX_COOKIE*" matches are not valid for flow
1435 * additions. Additions must use the "cookie" field of
1436 * the "nx_flow_mod" structure. */
1437 return OFPERR_NXBRC_NXM_INVALID;
1439 fm->cookie = nfm->cookie;
1440 fm->cookie_mask = htonll(UINT64_MAX);
1443 fm->idle_timeout = ntohs(nfm->idle_timeout);
1444 fm->hard_timeout = ntohs(nfm->hard_timeout);
1445 fm->buffer_id = ntohl(nfm->buffer_id);
1446 fm->out_port = ntohs(nfm->out_port);
1447 fm->flags = ntohs(nfm->flags);
1452 if (protocol & OFPUTIL_P_TID) {
1453 fm->command = command & 0xff;
1454 fm->table_id = command >> 8;
1456 fm->command = command;
1457 fm->table_id = 0xff;
1463 /* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to
1464 * 'protocol' and returns the message.
1466 * 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is
1467 * enabled, false otherwise. */
1469 ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm,
1470 enum ofputil_protocol protocol)
1472 size_t actions_len = fm->n_actions * sizeof *fm->actions;
1473 struct ofp_flow_mod *ofm;
1474 struct nx_flow_mod *nfm;
1479 command = (protocol & OFPUTIL_P_TID
1480 ? (fm->command & 0xff) | (fm->table_id << 8)
1484 case OFPUTIL_P_OF10:
1485 case OFPUTIL_P_OF10_TID:
1486 msg = ofpbuf_new(sizeof *ofm + actions_len);
1487 ofm = put_openflow(sizeof *ofm, OFPT10_FLOW_MOD, msg);
1488 ofputil_cls_rule_to_match(&fm->cr, &ofm->match);
1489 ofm->cookie = fm->cookie;
1490 ofm->command = htons(command);
1491 ofm->idle_timeout = htons(fm->idle_timeout);
1492 ofm->hard_timeout = htons(fm->hard_timeout);
1493 ofm->priority = htons(fm->cr.priority);
1494 ofm->buffer_id = htonl(fm->buffer_id);
1495 ofm->out_port = htons(fm->out_port);
1496 ofm->flags = htons(fm->flags);
1500 case OFPUTIL_P_NXM_TID:
1501 msg = ofpbuf_new(sizeof *nfm + NXM_TYPICAL_LEN + actions_len);
1502 put_nxmsg(sizeof *nfm, NXT_FLOW_MOD, msg);
1504 nfm->command = htons(command);
1505 if (command == OFPFC_ADD) {
1506 nfm->cookie = fm->cookie;
1507 match_len = nx_put_match(msg, &fm->cr, 0, 0);
1510 match_len = nx_put_match(msg, &fm->cr,
1511 fm->cookie, fm->cookie_mask);
1513 nfm->idle_timeout = htons(fm->idle_timeout);
1514 nfm->hard_timeout = htons(fm->hard_timeout);
1515 nfm->priority = htons(fm->cr.priority);
1516 nfm->buffer_id = htonl(fm->buffer_id);
1517 nfm->out_port = htons(fm->out_port);
1518 nfm->flags = htons(fm->flags);
1519 nfm->match_len = htons(match_len);
1526 ofpbuf_put(msg, fm->actions, actions_len);
1527 update_openflow_length(msg);
1531 /* Returns a bitmask with a 1-bit for each protocol that could be used to
1532 * send all of the 'n_fm's flow table modification requests in 'fms', and a
1533 * 0-bit for each protocol that is inadequate.
1535 * (The return value will have at least one 1-bit.) */
1536 enum ofputil_protocol
1537 ofputil_flow_mod_usable_protocols(const struct ofputil_flow_mod *fms,
1540 enum ofputil_protocol usable_protocols;
1543 usable_protocols = OFPUTIL_P_ANY;
1544 for (i = 0; i < n_fms; i++) {
1545 const struct ofputil_flow_mod *fm = &fms[i];
1547 usable_protocols &= ofputil_usable_protocols(&fm->cr);
1548 if (fm->table_id != 0xff) {
1549 usable_protocols &= OFPUTIL_P_TID;
1551 if (fm->command != OFPFC_ADD && fm->cookie_mask != htonll(0)) {
1552 usable_protocols &= OFPUTIL_P_NXM_ANY;
1555 assert(usable_protocols);
1557 return usable_protocols;
1561 ofputil_decode_ofpst_flow_request(struct ofputil_flow_stats_request *fsr,
1562 const struct ofp_header *oh,
1565 const struct ofp_flow_stats_request *ofsr =
1566 (const struct ofp_flow_stats_request *) oh;
1568 fsr->aggregate = aggregate;
1569 ofputil_cls_rule_from_match(&ofsr->match, 0, &fsr->match);
1570 fsr->out_port = ntohs(ofsr->out_port);
1571 fsr->table_id = ofsr->table_id;
1572 fsr->cookie = fsr->cookie_mask = htonll(0);
1578 ofputil_decode_nxst_flow_request(struct ofputil_flow_stats_request *fsr,
1579 const struct ofp_header *oh,
1582 const struct nx_flow_stats_request *nfsr;
1586 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1588 nfsr = ofpbuf_pull(&b, sizeof *nfsr);
1589 error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &fsr->match,
1590 &fsr->cookie, &fsr->cookie_mask);
1595 return OFPERR_OFPBRC_BAD_LEN;
1598 fsr->aggregate = aggregate;
1599 fsr->out_port = ntohs(nfsr->out_port);
1600 fsr->table_id = nfsr->table_id;
1605 /* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE
1606 * request 'oh', into an abstract flow_stats_request in 'fsr'. Returns 0 if
1607 * successful, otherwise an OpenFlow error code. */
1609 ofputil_decode_flow_stats_request(struct ofputil_flow_stats_request *fsr,
1610 const struct ofp_header *oh)
1612 const struct ofputil_msg_type *type;
1616 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1618 ofputil_decode_msg_type(oh, &type);
1619 code = ofputil_msg_type_code(type);
1621 case OFPUTIL_OFPST_FLOW_REQUEST:
1622 return ofputil_decode_ofpst_flow_request(fsr, oh, false);
1624 case OFPUTIL_OFPST_AGGREGATE_REQUEST:
1625 return ofputil_decode_ofpst_flow_request(fsr, oh, true);
1627 case OFPUTIL_NXST_FLOW_REQUEST:
1628 return ofputil_decode_nxst_flow_request(fsr, oh, false);
1630 case OFPUTIL_NXST_AGGREGATE_REQUEST:
1631 return ofputil_decode_nxst_flow_request(fsr, oh, true);
1634 /* Hey, the caller lied. */
1639 /* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW,
1640 * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to
1641 * 'protocol', and returns the message. */
1643 ofputil_encode_flow_stats_request(const struct ofputil_flow_stats_request *fsr,
1644 enum ofputil_protocol protocol)
1649 case OFPUTIL_P_OF10:
1650 case OFPUTIL_P_OF10_TID: {
1651 struct ofp_flow_stats_request *ofsr;
1654 type = fsr->aggregate ? OFPST_AGGREGATE : OFPST_FLOW;
1655 ofsr = ofputil_make_stats_request(sizeof *ofsr, type, 0, &msg);
1656 ofputil_cls_rule_to_match(&fsr->match, &ofsr->match);
1657 ofsr->table_id = fsr->table_id;
1658 ofsr->out_port = htons(fsr->out_port);
1663 case OFPUTIL_P_NXM_TID: {
1664 struct nx_flow_stats_request *nfsr;
1668 subtype = fsr->aggregate ? NXST_AGGREGATE : NXST_FLOW;
1669 ofputil_make_stats_request(sizeof *nfsr, OFPST_VENDOR, subtype, &msg);
1670 match_len = nx_put_match(msg, &fsr->match,
1671 fsr->cookie, fsr->cookie_mask);
1674 nfsr->out_port = htons(fsr->out_port);
1675 nfsr->match_len = htons(match_len);
1676 nfsr->table_id = fsr->table_id;
1687 /* Returns a bitmask with a 1-bit for each protocol that could be used to
1688 * accurately encode 'fsr', and a 0-bit for each protocol that is inadequate.
1690 * (The return value will have at least one 1-bit.) */
1691 enum ofputil_protocol
1692 ofputil_flow_stats_request_usable_protocols(
1693 const struct ofputil_flow_stats_request *fsr)
1695 enum ofputil_protocol usable_protocols;
1697 usable_protocols = ofputil_usable_protocols(&fsr->match);
1698 if (fsr->cookie_mask != htonll(0)) {
1699 usable_protocols &= OFPUTIL_P_NXM_ANY;
1701 return usable_protocols;
1704 /* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract
1705 * ofputil_flow_stats in 'fs'.
1707 * Multiple OFPST_FLOW or NXST_FLOW replies can be packed into a single
1708 * OpenFlow message. Calling this function multiple times for a single 'msg'
1709 * iterates through the replies. The caller must initially leave 'msg''s layer
1710 * pointers null and not modify them between calls.
1712 * Most switches don't send the values needed to populate fs->idle_age and
1713 * fs->hard_age, so those members will usually be set to 0. If the switch from
1714 * which 'msg' originated is known to implement NXT_FLOW_AGE, then pass
1715 * 'flow_age_extension' as true so that the contents of 'msg' determine the
1716 * 'idle_age' and 'hard_age' members in 'fs'.
1718 * Returns 0 if successful, EOF if no replies were left in this 'msg',
1719 * otherwise a positive errno value. */
1721 ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs,
1723 bool flow_age_extension)
1725 const struct ofputil_msg_type *type;
1728 ofputil_decode_msg_type(msg->l2 ? msg->l2 : msg->data, &type);
1729 code = ofputil_msg_type_code(type);
1731 msg->l2 = msg->data;
1732 if (code == OFPUTIL_OFPST_FLOW_REPLY) {
1733 ofpbuf_pull(msg, sizeof(struct ofp_stats_msg));
1734 } else if (code == OFPUTIL_NXST_FLOW_REPLY) {
1735 ofpbuf_pull(msg, sizeof(struct nicira_stats_msg));
1743 } else if (code == OFPUTIL_OFPST_FLOW_REPLY) {
1744 const struct ofp_flow_stats *ofs;
1747 ofs = ofpbuf_try_pull(msg, sizeof *ofs);
1749 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover "
1750 "bytes at end", msg->size);
1754 length = ntohs(ofs->length);
1755 if (length < sizeof *ofs) {
1756 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid "
1757 "length %zu", length);
1761 if (ofputil_pull_actions(msg, length - sizeof *ofs,
1762 &fs->actions, &fs->n_actions)) {
1766 fs->cookie = get_32aligned_be64(&ofs->cookie);
1767 ofputil_cls_rule_from_match(&ofs->match, ntohs(ofs->priority),
1769 fs->table_id = ofs->table_id;
1770 fs->duration_sec = ntohl(ofs->duration_sec);
1771 fs->duration_nsec = ntohl(ofs->duration_nsec);
1772 fs->idle_timeout = ntohs(ofs->idle_timeout);
1773 fs->hard_timeout = ntohs(ofs->hard_timeout);
1776 fs->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count));
1777 fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count));
1778 } else if (code == OFPUTIL_NXST_FLOW_REPLY) {
1779 const struct nx_flow_stats *nfs;
1780 size_t match_len, length;
1782 nfs = ofpbuf_try_pull(msg, sizeof *nfs);
1784 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply has %zu leftover "
1785 "bytes at end", msg->size);
1789 length = ntohs(nfs->length);
1790 match_len = ntohs(nfs->match_len);
1791 if (length < sizeof *nfs + ROUND_UP(match_len, 8)) {
1792 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply with match_len=%zu "
1793 "claims invalid length %zu", match_len, length);
1796 if (nx_pull_match(msg, match_len, ntohs(nfs->priority), &fs->rule,
1801 if (ofputil_pull_actions(msg,
1802 length - sizeof *nfs - ROUND_UP(match_len, 8),
1803 &fs->actions, &fs->n_actions)) {
1807 fs->cookie = nfs->cookie;
1808 fs->table_id = nfs->table_id;
1809 fs->duration_sec = ntohl(nfs->duration_sec);
1810 fs->duration_nsec = ntohl(nfs->duration_nsec);
1811 fs->idle_timeout = ntohs(nfs->idle_timeout);
1812 fs->hard_timeout = ntohs(nfs->hard_timeout);
1815 if (flow_age_extension) {
1816 if (nfs->idle_age) {
1817 fs->idle_age = ntohs(nfs->idle_age) - 1;
1819 if (nfs->hard_age) {
1820 fs->hard_age = ntohs(nfs->hard_age) - 1;
1823 fs->packet_count = ntohll(nfs->packet_count);
1824 fs->byte_count = ntohll(nfs->byte_count);
1832 /* Returns 'count' unchanged except that UINT64_MAX becomes 0.
1834 * We use this in situations where OVS internally uses UINT64_MAX to mean
1835 * "value unknown" but OpenFlow 1.0 does not define any unknown value. */
1837 unknown_to_zero(uint64_t count)
1839 return count != UINT64_MAX ? count : 0;
1842 /* Appends an OFPST_FLOW or NXST_FLOW reply that contains the data in 'fs' to
1843 * those already present in the list of ofpbufs in 'replies'. 'replies' should
1844 * have been initialized with ofputil_start_stats_reply(). */
1846 ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *fs,
1847 struct list *replies)
1849 size_t act_len = fs->n_actions * sizeof *fs->actions;
1850 const struct ofp_stats_msg *osm;
1852 osm = ofpbuf_from_list(list_back(replies))->data;
1853 if (osm->type == htons(OFPST_FLOW)) {
1854 size_t len = offsetof(struct ofp_flow_stats, actions) + act_len;
1855 struct ofp_flow_stats *ofs;
1857 ofs = ofputil_append_stats_reply(len, replies);
1858 ofs->length = htons(len);
1859 ofs->table_id = fs->table_id;
1861 ofputil_cls_rule_to_match(&fs->rule, &ofs->match);
1862 ofs->duration_sec = htonl(fs->duration_sec);
1863 ofs->duration_nsec = htonl(fs->duration_nsec);
1864 ofs->priority = htons(fs->rule.priority);
1865 ofs->idle_timeout = htons(fs->idle_timeout);
1866 ofs->hard_timeout = htons(fs->hard_timeout);
1867 memset(ofs->pad2, 0, sizeof ofs->pad2);
1868 put_32aligned_be64(&ofs->cookie, fs->cookie);
1869 put_32aligned_be64(&ofs->packet_count,
1870 htonll(unknown_to_zero(fs->packet_count)));
1871 put_32aligned_be64(&ofs->byte_count,
1872 htonll(unknown_to_zero(fs->byte_count)));
1873 memcpy(ofs->actions, fs->actions, act_len);
1874 } else if (osm->type == htons(OFPST_VENDOR)) {
1875 struct nx_flow_stats *nfs;
1879 msg = ofputil_reserve_stats_reply(
1880 sizeof *nfs + NXM_MAX_LEN + act_len, replies);
1881 start_len = msg->size;
1883 nfs = ofpbuf_put_uninit(msg, sizeof *nfs);
1884 nfs->table_id = fs->table_id;
1886 nfs->duration_sec = htonl(fs->duration_sec);
1887 nfs->duration_nsec = htonl(fs->duration_nsec);
1888 nfs->priority = htons(fs->rule.priority);
1889 nfs->idle_timeout = htons(fs->idle_timeout);
1890 nfs->hard_timeout = htons(fs->hard_timeout);
1891 nfs->idle_age = htons(fs->idle_age < 0 ? 0
1892 : fs->idle_age < UINT16_MAX ? fs->idle_age + 1
1894 nfs->hard_age = htons(fs->hard_age < 0 ? 0
1895 : fs->hard_age < UINT16_MAX ? fs->hard_age + 1
1897 nfs->match_len = htons(nx_put_match(msg, &fs->rule, 0, 0));
1898 nfs->cookie = fs->cookie;
1899 nfs->packet_count = htonll(fs->packet_count);
1900 nfs->byte_count = htonll(fs->byte_count);
1901 ofpbuf_put(msg, fs->actions, act_len);
1902 nfs->length = htons(msg->size - start_len);
1908 /* Converts abstract ofputil_aggregate_stats 'stats' into an OFPST_AGGREGATE or
1909 * NXST_AGGREGATE reply according to 'protocol', and returns the message. */
1911 ofputil_encode_aggregate_stats_reply(
1912 const struct ofputil_aggregate_stats *stats,
1913 const struct ofp_stats_msg *request)
1917 if (request->type == htons(OFPST_AGGREGATE)) {
1918 struct ofp_aggregate_stats_reply *asr;
1920 asr = ofputil_make_stats_reply(sizeof *asr, request, &msg);
1921 put_32aligned_be64(&asr->packet_count,
1922 htonll(unknown_to_zero(stats->packet_count)));
1923 put_32aligned_be64(&asr->byte_count,
1924 htonll(unknown_to_zero(stats->byte_count)));
1925 asr->flow_count = htonl(stats->flow_count);
1926 } else if (request->type == htons(OFPST_VENDOR)) {
1927 struct nx_aggregate_stats_reply *nasr;
1929 nasr = ofputil_make_stats_reply(sizeof *nasr, request, &msg);
1930 assert(nasr->nsm.subtype == htonl(NXST_AGGREGATE));
1931 nasr->packet_count = htonll(stats->packet_count);
1932 nasr->byte_count = htonll(stats->byte_count);
1933 nasr->flow_count = htonl(stats->flow_count);
1941 /* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh' into an
1942 * abstract ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise
1943 * an OpenFlow error code. */
1945 ofputil_decode_flow_removed(struct ofputil_flow_removed *fr,
1946 const struct ofp_header *oh)
1948 const struct ofputil_msg_type *type;
1949 enum ofputil_msg_code code;
1951 ofputil_decode_msg_type(oh, &type);
1952 code = ofputil_msg_type_code(type);
1953 if (code == OFPUTIL_OFPT_FLOW_REMOVED) {
1954 const struct ofp_flow_removed *ofr;
1956 ofr = (const struct ofp_flow_removed *) oh;
1957 ofputil_cls_rule_from_match(&ofr->match, ntohs(ofr->priority),
1959 fr->cookie = ofr->cookie;
1960 fr->reason = ofr->reason;
1961 fr->duration_sec = ntohl(ofr->duration_sec);
1962 fr->duration_nsec = ntohl(ofr->duration_nsec);
1963 fr->idle_timeout = ntohs(ofr->idle_timeout);
1964 fr->packet_count = ntohll(ofr->packet_count);
1965 fr->byte_count = ntohll(ofr->byte_count);
1966 } else if (code == OFPUTIL_NXT_FLOW_REMOVED) {
1967 struct nx_flow_removed *nfr;
1971 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1973 nfr = ofpbuf_pull(&b, sizeof *nfr);
1974 error = nx_pull_match(&b, ntohs(nfr->match_len), ntohs(nfr->priority),
1975 &fr->rule, NULL, NULL);
1980 return OFPERR_OFPBRC_BAD_LEN;
1983 fr->cookie = nfr->cookie;
1984 fr->reason = nfr->reason;
1985 fr->duration_sec = ntohl(nfr->duration_sec);
1986 fr->duration_nsec = ntohl(nfr->duration_nsec);
1987 fr->idle_timeout = ntohs(nfr->idle_timeout);
1988 fr->packet_count = ntohll(nfr->packet_count);
1989 fr->byte_count = ntohll(nfr->byte_count);
1997 /* Converts abstract ofputil_flow_removed 'fr' into an OFPT_FLOW_REMOVED or
1998 * NXT_FLOW_REMOVED message 'oh' according to 'protocol', and returns the
2001 ofputil_encode_flow_removed(const struct ofputil_flow_removed *fr,
2002 enum ofputil_protocol protocol)
2007 case OFPUTIL_P_OF10:
2008 case OFPUTIL_P_OF10_TID: {
2009 struct ofp_flow_removed *ofr;
2011 ofr = make_openflow_xid(sizeof *ofr, OFPT_FLOW_REMOVED, htonl(0),
2013 ofputil_cls_rule_to_match(&fr->rule, &ofr->match);
2014 ofr->cookie = fr->cookie;
2015 ofr->priority = htons(fr->rule.priority);
2016 ofr->reason = fr->reason;
2017 ofr->duration_sec = htonl(fr->duration_sec);
2018 ofr->duration_nsec = htonl(fr->duration_nsec);
2019 ofr->idle_timeout = htons(fr->idle_timeout);
2020 ofr->packet_count = htonll(unknown_to_zero(fr->packet_count));
2021 ofr->byte_count = htonll(unknown_to_zero(fr->byte_count));
2026 case OFPUTIL_P_NXM_TID: {
2027 struct nx_flow_removed *nfr;
2030 make_nxmsg_xid(sizeof *nfr, NXT_FLOW_REMOVED, htonl(0), &msg);
2031 match_len = nx_put_match(msg, &fr->rule, 0, 0);
2034 nfr->cookie = fr->cookie;
2035 nfr->priority = htons(fr->rule.priority);
2036 nfr->reason = fr->reason;
2037 nfr->duration_sec = htonl(fr->duration_sec);
2038 nfr->duration_nsec = htonl(fr->duration_nsec);
2039 nfr->idle_timeout = htons(fr->idle_timeout);
2040 nfr->match_len = htons(match_len);
2041 nfr->packet_count = htonll(fr->packet_count);
2042 nfr->byte_count = htonll(fr->byte_count);
2054 ofputil_decode_packet_in(struct ofputil_packet_in *pin,
2055 const struct ofp_header *oh)
2057 const struct ofputil_msg_type *type;
2058 enum ofputil_msg_code code;
2060 ofputil_decode_msg_type(oh, &type);
2061 code = ofputil_msg_type_code(type);
2062 memset(pin, 0, sizeof *pin);
2064 if (code == OFPUTIL_OFPT_PACKET_IN) {
2065 const struct ofp_packet_in *opi = (const struct ofp_packet_in *) oh;
2067 pin->packet = opi->data;
2068 pin->packet_len = ntohs(opi->header.length)
2069 - offsetof(struct ofp_packet_in, data);
2071 pin->fmd.in_port = ntohs(opi->in_port);
2072 pin->reason = opi->reason;
2073 pin->buffer_id = ntohl(opi->buffer_id);
2074 pin->total_len = ntohs(opi->total_len);
2075 } else if (code == OFPUTIL_NXT_PACKET_IN) {
2076 const struct nx_packet_in *npi;
2077 struct cls_rule rule;
2081 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2083 npi = ofpbuf_pull(&b, sizeof *npi);
2084 error = nx_pull_match_loose(&b, ntohs(npi->match_len), 0, &rule, NULL,
2090 if (!ofpbuf_try_pull(&b, 2)) {
2091 return OFPERR_OFPBRC_BAD_LEN;
2094 pin->packet = b.data;
2095 pin->packet_len = b.size;
2096 pin->reason = npi->reason;
2097 pin->table_id = npi->table_id;
2098 pin->cookie = npi->cookie;
2100 pin->fmd.in_port = rule.flow.in_port;
2102 pin->fmd.tun_id = rule.flow.tun_id;
2103 pin->fmd.tun_id_mask = rule.wc.tun_id_mask;
2105 memcpy(pin->fmd.regs, rule.flow.regs, sizeof pin->fmd.regs);
2106 memcpy(pin->fmd.reg_masks, rule.wc.reg_masks,
2107 sizeof pin->fmd.reg_masks);
2109 pin->buffer_id = ntohl(npi->buffer_id);
2110 pin->total_len = ntohs(npi->total_len);
2118 /* Converts abstract ofputil_packet_in 'pin' into a PACKET_IN message
2119 * in the format specified by 'packet_in_format'. */
2121 ofputil_encode_packet_in(const struct ofputil_packet_in *pin,
2122 enum nx_packet_in_format packet_in_format)
2124 size_t send_len = MIN(pin->send_len, pin->packet_len);
2125 struct ofpbuf *packet;
2127 /* Add OFPT_PACKET_IN. */
2128 if (packet_in_format == NXPIF_OPENFLOW10) {
2129 size_t header_len = offsetof(struct ofp_packet_in, data);
2130 struct ofp_packet_in *opi;
2132 packet = ofpbuf_new(send_len + header_len);
2133 opi = ofpbuf_put_zeros(packet, header_len);
2134 opi->header.version = OFP10_VERSION;
2135 opi->header.type = OFPT_PACKET_IN;
2136 opi->total_len = htons(pin->total_len);
2137 opi->in_port = htons(pin->fmd.in_port);
2138 opi->reason = pin->reason;
2139 opi->buffer_id = htonl(pin->buffer_id);
2141 ofpbuf_put(packet, pin->packet, send_len);
2142 } else if (packet_in_format == NXPIF_NXM) {
2143 struct nx_packet_in *npi;
2144 struct cls_rule rule;
2148 /* Estimate of required PACKET_IN length includes the NPI header, space
2149 * for the match (2 times sizeof the metadata seems like enough), 2
2150 * bytes for padding, and the packet length. */
2151 packet = ofpbuf_new(sizeof *npi + sizeof(struct flow_metadata) * 2
2154 cls_rule_init_catchall(&rule, 0);
2155 cls_rule_set_tun_id_masked(&rule, pin->fmd.tun_id,
2156 pin->fmd.tun_id_mask);
2158 for (i = 0; i < FLOW_N_REGS; i++) {
2159 cls_rule_set_reg_masked(&rule, i, pin->fmd.regs[i],
2160 pin->fmd.reg_masks[i]);
2163 cls_rule_set_in_port(&rule, pin->fmd.in_port);
2165 ofpbuf_put_zeros(packet, sizeof *npi);
2166 match_len = nx_put_match(packet, &rule, 0, 0);
2167 ofpbuf_put_zeros(packet, 2);
2168 ofpbuf_put(packet, pin->packet, send_len);
2171 npi->nxh.header.version = OFP10_VERSION;
2172 npi->nxh.header.type = OFPT_VENDOR;
2173 npi->nxh.vendor = htonl(NX_VENDOR_ID);
2174 npi->nxh.subtype = htonl(NXT_PACKET_IN);
2176 npi->buffer_id = htonl(pin->buffer_id);
2177 npi->total_len = htons(pin->total_len);
2178 npi->reason = pin->reason;
2179 npi->table_id = pin->table_id;
2180 npi->cookie = pin->cookie;
2181 npi->match_len = htons(match_len);
2185 update_openflow_length(packet);
2191 ofputil_packet_in_reason_to_string(enum ofp_packet_in_reason reason)
2193 static char s[INT_STRLEN(int) + 1];
2200 case OFPR_INVALID_TTL:
2201 return "invalid_ttl";
2203 case OFPR_N_REASONS:
2205 sprintf(s, "%d", (int) reason);
2211 ofputil_packet_in_reason_from_string(const char *s,
2212 enum ofp_packet_in_reason *reason)
2216 for (i = 0; i < OFPR_N_REASONS; i++) {
2217 if (!strcasecmp(s, ofputil_packet_in_reason_to_string(i))) {
2226 ofputil_decode_packet_out(struct ofputil_packet_out *po,
2227 const struct ofp_packet_out *opo)
2232 po->buffer_id = ntohl(opo->buffer_id);
2233 po->in_port = ntohs(opo->in_port);
2234 if (po->in_port >= OFPP_MAX && po->in_port != OFPP_LOCAL
2235 && po->in_port != OFPP_NONE && po->in_port != OFPP_CONTROLLER) {
2236 VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out has bad input port %#"PRIx16,
2238 return OFPERR_NXBRC_BAD_IN_PORT;
2241 ofpbuf_use_const(&b, opo, ntohs(opo->header.length));
2242 ofpbuf_pull(&b, sizeof *opo);
2244 error = ofputil_pull_actions(&b, ntohs(opo->actions_len),
2245 &po->actions, &po->n_actions);
2250 if (po->buffer_id == UINT32_MAX) {
2251 po->packet = b.data;
2252 po->packet_len = b.size;
2261 /* ofputil_phy_port */
2263 /* NETDEV_F_* to and from OFPPF_* and OFPPF10_*. */
2264 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
2265 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
2266 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
2267 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
2268 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
2269 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
2270 BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
2272 /* NETDEV_F_ bits 11...15 are OFPPF10_ bits 7...11: */
2273 BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == (OFPPF10_COPPER << 4));
2274 BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == (OFPPF10_FIBER << 4));
2275 BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == (OFPPF10_AUTONEG << 4));
2276 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == (OFPPF10_PAUSE << 4));
2277 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == (OFPPF10_PAUSE_ASYM << 4));
2279 static enum netdev_features
2280 netdev_port_features_from_ofp10(ovs_be32 ofp10_)
2282 uint32_t ofp10 = ntohl(ofp10_);
2283 return (ofp10 & 0x7f) | ((ofp10 & 0xf80) << 4);
2287 netdev_port_features_to_ofp10(enum netdev_features features)
2289 return htonl((features & 0x7f) | ((features & 0xf800) >> 4));
2292 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
2293 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
2294 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
2295 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
2296 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
2297 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
2298 BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
2299 BUILD_ASSERT_DECL((int) NETDEV_F_40GB_FD == OFPPF11_40GB_FD); /* bit 7 */
2300 BUILD_ASSERT_DECL((int) NETDEV_F_100GB_FD == OFPPF11_100GB_FD); /* bit 8 */
2301 BUILD_ASSERT_DECL((int) NETDEV_F_1TB_FD == OFPPF11_1TB_FD); /* bit 9 */
2302 BUILD_ASSERT_DECL((int) NETDEV_F_OTHER == OFPPF11_OTHER); /* bit 10 */
2303 BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == OFPPF11_COPPER); /* bit 11 */
2304 BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == OFPPF11_FIBER); /* bit 12 */
2305 BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == OFPPF11_AUTONEG); /* bit 13 */
2306 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == OFPPF11_PAUSE); /* bit 14 */
2307 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == OFPPF11_PAUSE_ASYM);/* bit 15 */
2309 static enum netdev_features
2310 netdev_port_features_from_ofp11(ovs_be32 ofp11)
2312 return ntohl(ofp11) & 0xffff;
2316 netdev_port_features_to_ofp11(enum netdev_features features)
2318 return htonl(features & 0xffff);
2322 ofputil_decode_ofp10_phy_port(struct ofputil_phy_port *pp,
2323 const struct ofp10_phy_port *opp)
2325 memset(pp, 0, sizeof *pp);
2327 pp->port_no = ntohs(opp->port_no);
2328 memcpy(pp->hw_addr, opp->hw_addr, OFP_ETH_ALEN);
2329 ovs_strlcpy(pp->name, opp->name, OFP_MAX_PORT_NAME_LEN);
2331 pp->config = ntohl(opp->config) & OFPPC10_ALL;
2332 pp->state = ntohl(opp->state) & OFPPS10_ALL;
2334 pp->curr = netdev_port_features_from_ofp10(opp->curr);
2335 pp->advertised = netdev_port_features_from_ofp10(opp->advertised);
2336 pp->supported = netdev_port_features_from_ofp10(opp->supported);
2337 pp->peer = netdev_port_features_from_ofp10(opp->peer);
2339 pp->curr_speed = netdev_features_to_bps(pp->curr) / 1000;
2340 pp->max_speed = netdev_features_to_bps(pp->supported) / 1000;
2346 ofputil_decode_ofp11_port(struct ofputil_phy_port *pp,
2347 const struct ofp11_port *op)
2351 memset(pp, 0, sizeof *pp);
2353 error = ofputil_port_from_ofp11(op->port_no, &pp->port_no);
2357 memcpy(pp->hw_addr, op->hw_addr, OFP_ETH_ALEN);
2358 ovs_strlcpy(pp->name, op->name, OFP_MAX_PORT_NAME_LEN);
2360 pp->config = ntohl(op->config) & OFPPC11_ALL;
2361 pp->state = ntohl(op->state) & OFPPC11_ALL;
2363 pp->curr = netdev_port_features_from_ofp11(op->curr);
2364 pp->advertised = netdev_port_features_from_ofp11(op->advertised);
2365 pp->supported = netdev_port_features_from_ofp11(op->supported);
2366 pp->peer = netdev_port_features_from_ofp11(op->peer);
2368 pp->curr_speed = ntohl(op->curr_speed);
2369 pp->max_speed = ntohl(op->max_speed);
2375 ofputil_encode_ofp10_phy_port(const struct ofputil_phy_port *pp,
2376 struct ofp10_phy_port *opp)
2378 memset(opp, 0, sizeof *opp);
2380 opp->port_no = htons(pp->port_no);
2381 memcpy(opp->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
2382 ovs_strlcpy(opp->name, pp->name, OFP_MAX_PORT_NAME_LEN);
2384 opp->config = htonl(pp->config & OFPPC10_ALL);
2385 opp->state = htonl(pp->state & OFPPS10_ALL);
2387 opp->curr = netdev_port_features_to_ofp10(pp->curr);
2388 opp->advertised = netdev_port_features_to_ofp10(pp->advertised);
2389 opp->supported = netdev_port_features_to_ofp10(pp->supported);
2390 opp->peer = netdev_port_features_to_ofp10(pp->peer);
2394 ofputil_encode_ofp11_port(const struct ofputil_phy_port *pp,
2395 struct ofp11_port *op)
2397 memset(op, 0, sizeof *op);
2399 op->port_no = ofputil_port_to_ofp11(pp->port_no);
2400 memcpy(op->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
2401 ovs_strlcpy(op->name, pp->name, OFP_MAX_PORT_NAME_LEN);
2403 op->config = htonl(pp->config & OFPPC11_ALL);
2404 op->state = htonl(pp->state & OFPPS11_ALL);
2406 op->curr = netdev_port_features_to_ofp11(pp->curr);
2407 op->advertised = netdev_port_features_to_ofp11(pp->advertised);
2408 op->supported = netdev_port_features_to_ofp11(pp->supported);
2409 op->peer = netdev_port_features_to_ofp11(pp->peer);
2411 op->curr_speed = htonl(pp->curr_speed);
2412 op->max_speed = htonl(pp->max_speed);
2416 ofputil_put_phy_port(uint8_t ofp_version, const struct ofputil_phy_port *pp,
2419 if (ofp_version == OFP10_VERSION) {
2420 struct ofp10_phy_port *opp;
2421 if (b->size + sizeof *opp <= UINT16_MAX) {
2422 opp = ofpbuf_put_uninit(b, sizeof *opp);
2423 ofputil_encode_ofp10_phy_port(pp, opp);
2426 struct ofp11_port *op;
2427 if (b->size + sizeof *op <= UINT16_MAX) {
2428 op = ofpbuf_put_uninit(b, sizeof *op);
2429 ofputil_encode_ofp11_port(pp, op);
2435 ofputil_append_port_desc_stats_reply(uint8_t ofp_version,
2436 const struct ofputil_phy_port *pp,
2437 struct list *replies)
2439 if (ofp_version == OFP10_VERSION) {
2440 struct ofp10_phy_port *opp;
2442 opp = ofputil_append_stats_reply(sizeof *opp, replies);
2443 ofputil_encode_ofp10_phy_port(pp, opp);
2445 struct ofp11_port *op;
2447 op = ofputil_append_stats_reply(sizeof *op, replies);
2448 ofputil_encode_ofp11_port(pp, op);
2452 /* ofputil_switch_features */
2454 #define OFPC_COMMON (OFPC_FLOW_STATS | OFPC_TABLE_STATS | OFPC_PORT_STATS | \
2455 OFPC_IP_REASM | OFPC_QUEUE_STATS | OFPC_ARP_MATCH_IP)
2456 BUILD_ASSERT_DECL((int) OFPUTIL_C_FLOW_STATS == OFPC_FLOW_STATS);
2457 BUILD_ASSERT_DECL((int) OFPUTIL_C_TABLE_STATS == OFPC_TABLE_STATS);
2458 BUILD_ASSERT_DECL((int) OFPUTIL_C_PORT_STATS == OFPC_PORT_STATS);
2459 BUILD_ASSERT_DECL((int) OFPUTIL_C_IP_REASM == OFPC_IP_REASM);
2460 BUILD_ASSERT_DECL((int) OFPUTIL_C_QUEUE_STATS == OFPC_QUEUE_STATS);
2461 BUILD_ASSERT_DECL((int) OFPUTIL_C_ARP_MATCH_IP == OFPC_ARP_MATCH_IP);
2463 struct ofputil_action_bit_translation {
2464 enum ofputil_action_bitmap ofputil_bit;
2468 static const struct ofputil_action_bit_translation of10_action_bits[] = {
2469 { OFPUTIL_A_OUTPUT, OFPAT10_OUTPUT },
2470 { OFPUTIL_A_SET_VLAN_VID, OFPAT10_SET_VLAN_VID },
2471 { OFPUTIL_A_SET_VLAN_PCP, OFPAT10_SET_VLAN_PCP },
2472 { OFPUTIL_A_STRIP_VLAN, OFPAT10_STRIP_VLAN },
2473 { OFPUTIL_A_SET_DL_SRC, OFPAT10_SET_DL_SRC },
2474 { OFPUTIL_A_SET_DL_DST, OFPAT10_SET_DL_DST },
2475 { OFPUTIL_A_SET_NW_SRC, OFPAT10_SET_NW_SRC },
2476 { OFPUTIL_A_SET_NW_DST, OFPAT10_SET_NW_DST },
2477 { OFPUTIL_A_SET_NW_TOS, OFPAT10_SET_NW_TOS },
2478 { OFPUTIL_A_SET_TP_SRC, OFPAT10_SET_TP_SRC },
2479 { OFPUTIL_A_SET_TP_DST, OFPAT10_SET_TP_DST },
2480 { OFPUTIL_A_ENQUEUE, OFPAT10_ENQUEUE },
2484 static const struct ofputil_action_bit_translation of11_action_bits[] = {
2485 { OFPUTIL_A_OUTPUT, OFPAT11_OUTPUT },
2486 { OFPUTIL_A_SET_VLAN_VID, OFPAT11_SET_VLAN_VID },
2487 { OFPUTIL_A_SET_VLAN_PCP, OFPAT11_SET_VLAN_PCP },
2488 { OFPUTIL_A_SET_DL_SRC, OFPAT11_SET_DL_SRC },
2489 { OFPUTIL_A_SET_DL_DST, OFPAT11_SET_DL_DST },
2490 { OFPUTIL_A_SET_NW_SRC, OFPAT11_SET_NW_SRC },
2491 { OFPUTIL_A_SET_NW_DST, OFPAT11_SET_NW_DST },
2492 { OFPUTIL_A_SET_NW_TOS, OFPAT11_SET_NW_TOS },
2493 { OFPUTIL_A_SET_NW_ECN, OFPAT11_SET_NW_ECN },
2494 { OFPUTIL_A_SET_TP_SRC, OFPAT11_SET_TP_SRC },
2495 { OFPUTIL_A_SET_TP_DST, OFPAT11_SET_TP_DST },
2496 { OFPUTIL_A_COPY_TTL_OUT, OFPAT11_COPY_TTL_OUT },
2497 { OFPUTIL_A_COPY_TTL_IN, OFPAT11_COPY_TTL_IN },
2498 { OFPUTIL_A_SET_MPLS_LABEL, OFPAT11_SET_MPLS_LABEL },
2499 { OFPUTIL_A_SET_MPLS_TC, OFPAT11_SET_MPLS_TC },
2500 { OFPUTIL_A_SET_MPLS_TTL, OFPAT11_SET_MPLS_TTL },
2501 { OFPUTIL_A_DEC_MPLS_TTL, OFPAT11_DEC_MPLS_TTL },
2502 { OFPUTIL_A_PUSH_VLAN, OFPAT11_PUSH_VLAN },
2503 { OFPUTIL_A_POP_VLAN, OFPAT11_POP_VLAN },
2504 { OFPUTIL_A_PUSH_MPLS, OFPAT11_PUSH_MPLS },
2505 { OFPUTIL_A_POP_MPLS, OFPAT11_POP_MPLS },
2506 { OFPUTIL_A_SET_QUEUE, OFPAT11_SET_QUEUE },
2507 { OFPUTIL_A_GROUP, OFPAT11_GROUP },
2508 { OFPUTIL_A_SET_NW_TTL, OFPAT11_SET_NW_TTL },
2509 { OFPUTIL_A_DEC_NW_TTL, OFPAT11_DEC_NW_TTL },
2513 static enum ofputil_action_bitmap
2514 decode_action_bits(ovs_be32 of_actions,
2515 const struct ofputil_action_bit_translation *x)
2517 enum ofputil_action_bitmap ofputil_actions;
2519 ofputil_actions = 0;
2520 for (; x->ofputil_bit; x++) {
2521 if (of_actions & htonl(1u << x->of_bit)) {
2522 ofputil_actions |= x->ofputil_bit;
2525 return ofputil_actions;
2528 /* Decodes an OpenFlow 1.0 or 1.1 "switch_features" structure 'osf' into an
2529 * abstract representation in '*features'. Initializes '*b' to iterate over
2530 * the OpenFlow port structures following 'osf' with later calls to
2531 * ofputil_pull_phy_port(). Returns 0 if successful, otherwise an
2532 * OFPERR_* value. */
2534 ofputil_decode_switch_features(const struct ofp_switch_features *osf,
2535 struct ofputil_switch_features *features,
2538 ofpbuf_use_const(b, osf, ntohs(osf->header.length));
2539 ofpbuf_pull(b, sizeof *osf);
2541 features->datapath_id = ntohll(osf->datapath_id);
2542 features->n_buffers = ntohl(osf->n_buffers);
2543 features->n_tables = osf->n_tables;
2545 features->capabilities = ntohl(osf->capabilities) & OFPC_COMMON;
2546 if (osf->header.version == OFP10_VERSION) {
2547 if (b->size % sizeof(struct ofp10_phy_port)) {
2548 return OFPERR_OFPBRC_BAD_LEN;
2551 if (osf->capabilities & htonl(OFPC10_STP)) {
2552 features->capabilities |= OFPUTIL_C_STP;
2554 features->actions = decode_action_bits(osf->actions, of10_action_bits);
2555 } else if (osf->header.version == OFP11_VERSION) {
2556 if (b->size % sizeof(struct ofp11_port)) {
2557 return OFPERR_OFPBRC_BAD_LEN;
2560 if (osf->capabilities & htonl(OFPC11_GROUP_STATS)) {
2561 features->capabilities |= OFPUTIL_C_GROUP_STATS;
2563 features->actions = decode_action_bits(osf->actions, of11_action_bits);
2565 return OFPERR_OFPBRC_BAD_VERSION;
2571 /* Returns true if the maximum number of ports are in 'osf'. */
2573 max_ports_in_features(const struct ofp_switch_features *osf)
2575 size_t pp_size = osf->header.version == OFP10_VERSION ?
2576 sizeof(struct ofp10_phy_port) :
2577 sizeof(struct ofp11_port);
2579 return ntohs(osf->header.length) + pp_size > UINT16_MAX;
2582 /* Given a buffer 'b' that contains a Features Reply message, checks if
2583 * it contains the maximum number of ports that will fit. If so, it
2584 * returns true and removes the ports from the message. The caller
2585 * should then send an OFPST_PORT_DESC stats request to get the ports,
2586 * since the switch may have more ports than could be represented in the
2587 * Features Reply. Otherwise, returns false.
2590 ofputil_switch_features_ports_trunc(struct ofpbuf *b)
2592 struct ofp_switch_features *osf = b->data;
2594 if (max_ports_in_features(osf)) {
2595 /* Remove all the ports. */
2596 b->size = sizeof(*osf);
2597 update_openflow_length(b);
2606 encode_action_bits(enum ofputil_action_bitmap ofputil_actions,
2607 const struct ofputil_action_bit_translation *x)
2609 uint32_t of_actions;
2612 for (; x->ofputil_bit; x++) {
2613 if (ofputil_actions & x->ofputil_bit) {
2614 of_actions |= 1 << x->of_bit;
2617 return htonl(of_actions);
2620 /* Returns a buffer owned by the caller that encodes 'features' in the format
2621 * required by 'protocol' with the given 'xid'. The caller should append port
2622 * information to the buffer with subsequent calls to
2623 * ofputil_put_switch_features_port(). */
2625 ofputil_encode_switch_features(const struct ofputil_switch_features *features,
2626 enum ofputil_protocol protocol, ovs_be32 xid)
2628 struct ofp_switch_features *osf;
2631 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, xid, &b);
2632 osf->header.version = ofputil_protocol_to_ofp_version(protocol);
2633 osf->datapath_id = htonll(features->datapath_id);
2634 osf->n_buffers = htonl(features->n_buffers);
2635 osf->n_tables = features->n_tables;
2637 osf->capabilities = htonl(features->capabilities & OFPC_COMMON);
2638 if (osf->header.version == OFP10_VERSION) {
2639 if (features->capabilities & OFPUTIL_C_STP) {
2640 osf->capabilities |= htonl(OFPC10_STP);
2642 osf->actions = encode_action_bits(features->actions, of10_action_bits);
2644 if (features->capabilities & OFPUTIL_C_GROUP_STATS) {
2645 osf->capabilities |= htonl(OFPC11_GROUP_STATS);
2647 osf->actions = encode_action_bits(features->actions, of11_action_bits);
2653 /* Encodes 'pp' into the format required by the switch_features message already
2654 * in 'b', which should have been returned by ofputil_encode_switch_features(),
2655 * and appends the encoded version to 'b'. */
2657 ofputil_put_switch_features_port(const struct ofputil_phy_port *pp,
2660 const struct ofp_switch_features *osf = b->data;
2662 ofputil_put_phy_port(osf->header.version, pp, b);
2665 /* ofputil_port_status */
2667 /* Decodes the OpenFlow "port status" message in '*ops' into an abstract form
2668 * in '*ps'. Returns 0 if successful, otherwise an OFPERR_* value. */
2670 ofputil_decode_port_status(const struct ofp_port_status *ops,
2671 struct ofputil_port_status *ps)
2676 if (ops->reason != OFPPR_ADD &&
2677 ops->reason != OFPPR_DELETE &&
2678 ops->reason != OFPPR_MODIFY) {
2679 return OFPERR_NXBRC_BAD_REASON;
2681 ps->reason = ops->reason;
2683 ofpbuf_use_const(&b, ops, ntohs(ops->header.length));
2684 ofpbuf_pull(&b, sizeof *ops);
2685 retval = ofputil_pull_phy_port(ops->header.version, &b, &ps->desc);
2686 assert(retval != EOF);
2690 /* Converts the abstract form of a "port status" message in '*ps' into an
2691 * OpenFlow message suitable for 'protocol', and returns that encoded form in
2692 * a buffer owned by the caller. */
2694 ofputil_encode_port_status(const struct ofputil_port_status *ps,
2695 enum ofputil_protocol protocol)
2697 struct ofp_port_status *ops;
2700 b = ofpbuf_new(sizeof *ops + sizeof(struct ofp11_port));
2701 ops = put_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, htonl(0), b);
2702 ops->header.version = ofputil_protocol_to_ofp_version(protocol);
2703 ops->reason = ps->reason;
2704 ofputil_put_phy_port(ops->header.version, &ps->desc, b);
2705 update_openflow_length(b);
2709 /* ofputil_port_mod */
2711 /* Decodes the OpenFlow "port mod" message in '*oh' into an abstract form in
2712 * '*pm'. Returns 0 if successful, otherwise an OFPERR_* value. */
2714 ofputil_decode_port_mod(const struct ofp_header *oh,
2715 struct ofputil_port_mod *pm)
2717 if (oh->version == OFP10_VERSION) {
2718 const struct ofp10_port_mod *opm = (const struct ofp10_port_mod *) oh;
2720 if (oh->length != htons(sizeof *opm)) {
2721 return OFPERR_OFPBRC_BAD_LEN;
2724 pm->port_no = ntohs(opm->port_no);
2725 memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
2726 pm->config = ntohl(opm->config) & OFPPC10_ALL;
2727 pm->mask = ntohl(opm->mask) & OFPPC10_ALL;
2728 pm->advertise = netdev_port_features_from_ofp10(opm->advertise);
2729 } else if (oh->version == OFP11_VERSION) {
2730 const struct ofp11_port_mod *opm = (const struct ofp11_port_mod *) oh;
2733 if (oh->length != htons(sizeof *opm)) {
2734 return OFPERR_OFPBRC_BAD_LEN;
2737 error = ofputil_port_from_ofp11(opm->port_no, &pm->port_no);
2742 memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
2743 pm->config = ntohl(opm->config) & OFPPC11_ALL;
2744 pm->mask = ntohl(opm->mask) & OFPPC11_ALL;
2745 pm->advertise = netdev_port_features_from_ofp11(opm->advertise);
2747 return OFPERR_OFPBRC_BAD_VERSION;
2750 pm->config &= pm->mask;
2754 /* Converts the abstract form of a "port mod" message in '*pm' into an OpenFlow
2755 * message suitable for 'protocol', and returns that encoded form in a buffer
2756 * owned by the caller. */
2758 ofputil_encode_port_mod(const struct ofputil_port_mod *pm,
2759 enum ofputil_protocol protocol)
2761 uint8_t ofp_version = ofputil_protocol_to_ofp_version(protocol);
2764 if (ofp_version == OFP10_VERSION) {
2765 struct ofp10_port_mod *opm;
2767 opm = make_openflow(sizeof *opm, OFPT10_PORT_MOD, &b);
2768 opm->port_no = htons(pm->port_no);
2769 memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
2770 opm->config = htonl(pm->config & OFPPC10_ALL);
2771 opm->mask = htonl(pm->mask & OFPPC10_ALL);
2772 opm->advertise = netdev_port_features_to_ofp10(pm->advertise);
2773 } else if (ofp_version == OFP11_VERSION) {
2774 struct ofp11_port_mod *opm;
2776 opm = make_openflow(sizeof *opm, OFPT11_PORT_MOD, &b);
2777 opm->port_no = htonl(pm->port_no);
2778 memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
2779 opm->config = htonl(pm->config & OFPPC11_ALL);
2780 opm->mask = htonl(pm->mask & OFPPC11_ALL);
2781 opm->advertise = netdev_port_features_to_ofp11(pm->advertise);
2790 ofputil_encode_packet_out(const struct ofputil_packet_out *po)
2792 struct ofp_packet_out *opo;
2797 actions_len = po->n_actions * sizeof *po->actions;
2798 size = sizeof *opo + actions_len;
2799 if (po->buffer_id == UINT32_MAX) {
2800 size += po->packet_len;
2803 msg = ofpbuf_new(size);
2804 opo = put_openflow(sizeof *opo, OFPT10_PACKET_OUT, msg);
2805 opo->buffer_id = htonl(po->buffer_id);
2806 opo->in_port = htons(po->in_port);
2807 opo->actions_len = htons(actions_len);
2808 ofpbuf_put(msg, po->actions, actions_len);
2809 if (po->buffer_id == UINT32_MAX) {
2810 ofpbuf_put(msg, po->packet, po->packet_len);
2812 update_openflow_length(msg);
2817 /* Returns a string representing the message type of 'type'. The string is the
2818 * enumeration constant for the type, e.g. "OFPT_HELLO". For statistics
2819 * messages, the constant is followed by "request" or "reply",
2820 * e.g. "OFPST_AGGREGATE reply". */
2822 ofputil_msg_type_name(const struct ofputil_msg_type *type)
2827 /* Allocates and stores in '*bufferp' a new ofpbuf with a size of
2828 * 'openflow_len', starting with an OpenFlow header with the given 'type' and
2829 * an arbitrary transaction id. Allocated bytes beyond the header, if any, are
2832 * The caller is responsible for freeing '*bufferp' when it is no longer
2835 * The OpenFlow header length is initially set to 'openflow_len'; if the
2836 * message is later extended, the length should be updated with
2837 * update_openflow_length() before sending.
2839 * Returns the header. */
2841 make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **bufferp)
2843 *bufferp = ofpbuf_new(openflow_len);
2844 return put_openflow_xid(openflow_len, type, alloc_xid(), *bufferp);
2847 /* Similar to make_openflow() but creates a Nicira vendor extension message
2848 * with the specific 'subtype'. 'subtype' should be in host byte order. */
2850 make_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf **bufferp)
2852 return make_nxmsg_xid(openflow_len, subtype, alloc_xid(), bufferp);
2855 /* Allocates and stores in '*bufferp' a new ofpbuf with a size of
2856 * 'openflow_len', starting with an OpenFlow header with the given 'type' and
2857 * transaction id 'xid'. Allocated bytes beyond the header, if any, are
2860 * The caller is responsible for freeing '*bufferp' when it is no longer
2863 * The OpenFlow header length is initially set to 'openflow_len'; if the
2864 * message is later extended, the length should be updated with
2865 * update_openflow_length() before sending.
2867 * Returns the header. */
2869 make_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid,
2870 struct ofpbuf **bufferp)
2872 *bufferp = ofpbuf_new(openflow_len);
2873 return put_openflow_xid(openflow_len, type, xid, *bufferp);
2876 /* Similar to make_openflow_xid() but creates a Nicira vendor extension message
2877 * with the specific 'subtype'. 'subtype' should be in host byte order. */
2879 make_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid,
2880 struct ofpbuf **bufferp)
2882 *bufferp = ofpbuf_new(openflow_len);
2883 return put_nxmsg_xid(openflow_len, subtype, xid, *bufferp);
2886 /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
2887 * with the given 'type' and an arbitrary transaction id. Allocated bytes
2888 * beyond the header, if any, are zeroed.
2890 * The OpenFlow header length is initially set to 'openflow_len'; if the
2891 * message is later extended, the length should be updated with
2892 * update_openflow_length() before sending.
2894 * Returns the header. */
2896 put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *buffer)
2898 return put_openflow_xid(openflow_len, type, alloc_xid(), buffer);
2901 /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
2902 * with the given 'type' and an transaction id 'xid'. Allocated bytes beyond
2903 * the header, if any, are zeroed.
2905 * The OpenFlow header length is initially set to 'openflow_len'; if the
2906 * message is later extended, the length should be updated with
2907 * update_openflow_length() before sending.
2909 * Returns the header. */
2911 put_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid,
2912 struct ofpbuf *buffer)
2914 struct ofp_header *oh;
2916 assert(openflow_len >= sizeof *oh);
2917 assert(openflow_len <= UINT16_MAX);
2919 oh = ofpbuf_put_uninit(buffer, openflow_len);
2920 oh->version = OFP10_VERSION;
2922 oh->length = htons(openflow_len);
2924 memset(oh + 1, 0, openflow_len - sizeof *oh);
2928 /* Similar to put_openflow() but append a Nicira vendor extension message with
2929 * the specific 'subtype'. 'subtype' should be in host byte order. */
2931 put_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf *buffer)
2933 return put_nxmsg_xid(openflow_len, subtype, alloc_xid(), buffer);
2936 /* Similar to put_openflow_xid() but append a Nicira vendor extension message
2937 * with the specific 'subtype'. 'subtype' should be in host byte order. */
2939 put_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid,
2940 struct ofpbuf *buffer)
2942 struct nicira_header *nxh;
2944 nxh = put_openflow_xid(openflow_len, OFPT_VENDOR, xid, buffer);
2945 nxh->vendor = htonl(NX_VENDOR_ID);
2946 nxh->subtype = htonl(subtype);
2950 /* Updates the 'length' field of the OpenFlow message in 'buffer' to
2951 * 'buffer->size'. */
2953 update_openflow_length(struct ofpbuf *buffer)
2955 struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh);
2956 oh->length = htons(buffer->size);
2960 put_stats__(ovs_be32 xid, uint8_t ofp_type,
2961 ovs_be16 ofpst_type, ovs_be32 nxst_subtype,
2964 if (ofpst_type == htons(OFPST_VENDOR)) {
2965 struct nicira_stats_msg *nsm;
2967 nsm = put_openflow_xid(sizeof *nsm, ofp_type, xid, msg);
2968 nsm->vsm.osm.type = ofpst_type;
2969 nsm->vsm.vendor = htonl(NX_VENDOR_ID);
2970 nsm->subtype = nxst_subtype;
2972 struct ofp_stats_msg *osm;
2974 osm = put_openflow_xid(sizeof *osm, ofp_type, xid, msg);
2975 osm->type = ofpst_type;
2979 /* Creates a statistics request message with total length 'openflow_len'
2980 * (including all headers) and the given 'ofpst_type', and stores the buffer
2981 * containing the new message in '*bufferp'. If 'ofpst_type' is OFPST_VENDOR
2982 * then 'nxst_subtype' is used as the Nicira vendor extension statistics
2983 * subtype (otherwise 'nxst_subtype' is ignored).
2985 * Initializes bytes following the headers to all-bits-zero.
2987 * Returns the first byte of the new message. */
2989 ofputil_make_stats_request(size_t openflow_len, uint16_t ofpst_type,
2990 uint32_t nxst_subtype, struct ofpbuf **bufferp)
2994 msg = *bufferp = ofpbuf_new(openflow_len);
2995 put_stats__(alloc_xid(), OFPT10_STATS_REQUEST,
2996 htons(ofpst_type), htonl(nxst_subtype), msg);
2997 ofpbuf_padto(msg, openflow_len);
3003 put_stats_reply__(const struct ofp_stats_msg *request, struct ofpbuf *msg)
3005 assert(request->header.type == OFPT10_STATS_REQUEST ||
3006 request->header.type == OFPT10_STATS_REPLY);
3007 put_stats__(request->header.xid, OFPT10_STATS_REPLY, request->type,
3008 (request->type != htons(OFPST_VENDOR)
3010 : ((const struct nicira_stats_msg *) request)->subtype),
3014 /* Creates a statistics reply message with total length 'openflow_len'
3015 * (including all headers) and the same type (either a standard OpenFlow
3016 * statistics type or a Nicira extension type and subtype) as 'request', and
3017 * stores the buffer containing the new message in '*bufferp'.
3019 * Initializes bytes following the headers to all-bits-zero.
3021 * Returns the first byte of the new message. */
3023 ofputil_make_stats_reply(size_t openflow_len,
3024 const struct ofp_stats_msg *request,
3025 struct ofpbuf **bufferp)
3029 msg = *bufferp = ofpbuf_new(openflow_len);
3030 put_stats_reply__(request, msg);
3031 ofpbuf_padto(msg, openflow_len);
3036 /* Initializes 'replies' as a list of ofpbufs that will contain a series of
3037 * replies to 'request', which should be an OpenFlow or Nicira extension
3038 * statistics request. Initially 'replies' will have a single reply message
3039 * that has only a header. The functions ofputil_reserve_stats_reply() and
3040 * ofputil_append_stats_reply() may be used to add to the reply. */
3042 ofputil_start_stats_reply(const struct ofp_stats_msg *request,
3043 struct list *replies)
3047 msg = ofpbuf_new(1024);
3048 put_stats_reply__(request, msg);
3051 list_push_back(replies, &msg->list_node);
3054 /* Prepares to append up to 'len' bytes to the series of statistics replies in
3055 * 'replies', which should have been initialized with
3056 * ofputil_start_stats_reply(). Returns an ofpbuf with at least 'len' bytes of
3057 * tailroom. (The 'len' bytes have not actually be allocated; the caller must
3058 * do so with e.g. ofpbuf_put_uninit().) */
3060 ofputil_reserve_stats_reply(size_t len, struct list *replies)
3062 struct ofpbuf *msg = ofpbuf_from_list(list_back(replies));
3063 struct ofp_stats_msg *osm = msg->data;
3065 if (msg->size + len <= UINT16_MAX) {
3066 ofpbuf_prealloc_tailroom(msg, len);
3068 osm->flags |= htons(OFPSF_REPLY_MORE);
3070 msg = ofpbuf_new(MAX(1024, sizeof(struct nicira_stats_msg) + len));
3071 put_stats_reply__(osm, msg);
3072 list_push_back(replies, &msg->list_node);
3077 /* Appends 'len' bytes to the series of statistics replies in 'replies', and
3078 * returns the first byte. */
3080 ofputil_append_stats_reply(size_t len, struct list *replies)
3082 return ofpbuf_put_uninit(ofputil_reserve_stats_reply(len, replies), len);
3085 /* Returns the first byte past the ofp_stats_msg header in 'oh'. */
3087 ofputil_stats_body(const struct ofp_header *oh)
3089 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3090 return (const struct ofp_stats_msg *) oh + 1;
3093 /* Returns the number of bytes past the ofp_stats_msg header in 'oh'. */
3095 ofputil_stats_body_len(const struct ofp_header *oh)
3097 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3098 return ntohs(oh->length) - sizeof(struct ofp_stats_msg);
3101 /* Returns the first byte past the nicira_stats_msg header in 'oh'. */
3103 ofputil_nxstats_body(const struct ofp_header *oh)
3105 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3106 return ((const struct nicira_stats_msg *) oh) + 1;
3109 /* Returns the number of bytes past the nicira_stats_msg header in 'oh'. */
3111 ofputil_nxstats_body_len(const struct ofp_header *oh)
3113 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3114 return ntohs(oh->length) - sizeof(struct nicira_stats_msg);
3118 make_flow_mod(uint16_t command, const struct cls_rule *rule,
3121 struct ofp_flow_mod *ofm;
3122 size_t size = sizeof *ofm + actions_len;
3123 struct ofpbuf *out = ofpbuf_new(size);
3124 ofm = ofpbuf_put_zeros(out, sizeof *ofm);
3125 ofm->header.version = OFP10_VERSION;
3126 ofm->header.type = OFPT10_FLOW_MOD;
3127 ofm->header.length = htons(size);
3129 ofm->priority = htons(MIN(rule->priority, UINT16_MAX));
3130 ofputil_cls_rule_to_match(rule, &ofm->match);
3131 ofm->command = htons(command);
3136 make_add_flow(const struct cls_rule *rule, uint32_t buffer_id,
3137 uint16_t idle_timeout, size_t actions_len)
3139 struct ofpbuf *out = make_flow_mod(OFPFC_ADD, rule, actions_len);
3140 struct ofp_flow_mod *ofm = out->data;
3141 ofm->idle_timeout = htons(idle_timeout);
3142 ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
3143 ofm->buffer_id = htonl(buffer_id);
3148 make_del_flow(const struct cls_rule *rule)
3150 struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, rule, 0);
3151 struct ofp_flow_mod *ofm = out->data;
3152 ofm->out_port = htons(OFPP_NONE);
3157 make_add_simple_flow(const struct cls_rule *rule,
3158 uint32_t buffer_id, uint16_t out_port,
3159 uint16_t idle_timeout)
3161 if (out_port != OFPP_NONE) {
3162 struct ofp_action_output *oao;
3163 struct ofpbuf *buffer;
3165 buffer = make_add_flow(rule, buffer_id, idle_timeout, sizeof *oao);
3166 ofputil_put_OFPAT10_OUTPUT(buffer)->port = htons(out_port);
3169 return make_add_flow(rule, buffer_id, idle_timeout, 0);
3174 make_packet_in(uint32_t buffer_id, uint16_t in_port, uint8_t reason,
3175 const struct ofpbuf *payload, int max_send_len)
3177 struct ofp_packet_in *opi;
3181 send_len = MIN(max_send_len, payload->size);
3182 buf = ofpbuf_new(sizeof *opi + send_len);
3183 opi = put_openflow_xid(offsetof(struct ofp_packet_in, data),
3184 OFPT_PACKET_IN, 0, buf);
3185 opi->buffer_id = htonl(buffer_id);
3186 opi->total_len = htons(payload->size);
3187 opi->in_port = htons(in_port);
3188 opi->reason = reason;
3189 ofpbuf_put(buf, payload->data, send_len);
3190 update_openflow_length(buf);
3195 /* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
3197 make_echo_request(void)
3199 struct ofp_header *rq;
3200 struct ofpbuf *out = ofpbuf_new(sizeof *rq);
3201 rq = ofpbuf_put_uninit(out, sizeof *rq);
3202 rq->version = OFP10_VERSION;
3203 rq->type = OFPT_ECHO_REQUEST;
3204 rq->length = htons(sizeof *rq);
3209 /* Creates and returns an OFPT_ECHO_REPLY message matching the
3210 * OFPT_ECHO_REQUEST message in 'rq'. */
3212 make_echo_reply(const struct ofp_header *rq)
3214 size_t size = ntohs(rq->length);
3215 struct ofpbuf *out = ofpbuf_new(size);
3216 struct ofp_header *reply = ofpbuf_put(out, rq, size);
3217 reply->type = OFPT_ECHO_REPLY;
3222 ofputil_encode_barrier_request(void)
3226 make_openflow(sizeof(struct ofp_header), OFPT10_BARRIER_REQUEST, &msg);
3231 ofputil_frag_handling_to_string(enum ofp_config_flags flags)
3233 switch (flags & OFPC_FRAG_MASK) {
3234 case OFPC_FRAG_NORMAL: return "normal";
3235 case OFPC_FRAG_DROP: return "drop";
3236 case OFPC_FRAG_REASM: return "reassemble";
3237 case OFPC_FRAG_NX_MATCH: return "nx-match";
3244 ofputil_frag_handling_from_string(const char *s, enum ofp_config_flags *flags)
3246 if (!strcasecmp(s, "normal")) {
3247 *flags = OFPC_FRAG_NORMAL;
3248 } else if (!strcasecmp(s, "drop")) {
3249 *flags = OFPC_FRAG_DROP;
3250 } else if (!strcasecmp(s, "reassemble")) {
3251 *flags = OFPC_FRAG_REASM;
3252 } else if (!strcasecmp(s, "nx-match")) {
3253 *flags = OFPC_FRAG_NX_MATCH;
3260 /* Converts the OpenFlow 1.1+ port number 'ofp11_port' into an OpenFlow 1.0
3261 * port number and stores the latter in '*ofp10_port', for the purpose of
3262 * decoding OpenFlow 1.1+ protocol messages. Returns 0 if successful,
3263 * otherwise an OFPERR_* number.
3265 * See the definition of OFP11_MAX for an explanation of the mapping. */
3267 ofputil_port_from_ofp11(ovs_be32 ofp11_port, uint16_t *ofp10_port)
3269 uint32_t ofp11_port_h = ntohl(ofp11_port);
3271 if (ofp11_port_h < OFPP_MAX) {
3272 *ofp10_port = ofp11_port_h;
3274 } else if (ofp11_port_h >= OFPP11_MAX) {
3275 *ofp10_port = ofp11_port_h - OFPP11_OFFSET;
3278 VLOG_WARN_RL(&bad_ofmsg_rl, "port %"PRIu32" is outside the supported "
3279 "range 0 through %d or 0x%"PRIx32" through 0x%"PRIx32,
3280 ofp11_port_h, OFPP_MAX - 1,
3281 (uint32_t) OFPP11_MAX, UINT32_MAX);
3282 return OFPERR_OFPBAC_BAD_OUT_PORT;
3286 /* Returns the OpenFlow 1.1+ port number equivalent to the OpenFlow 1.0 port
3287 * number 'ofp10_port', for encoding OpenFlow 1.1+ protocol messages.
3289 * See the definition of OFP11_MAX for an explanation of the mapping. */
3291 ofputil_port_to_ofp11(uint16_t ofp10_port)
3293 return htonl(ofp10_port < OFPP_MAX
3295 : ofp10_port + OFPP11_OFFSET);
3298 /* Checks that 'port' is a valid output port for the OFPAT10_OUTPUT action, given
3299 * that the switch will never have more than 'max_ports' ports. Returns 0 if
3300 * 'port' is valid, otherwise an OpenFlow return code. */
3302 ofputil_check_output_port(uint16_t port, int max_ports)
3310 case OFPP_CONTROLLER:
3315 if (port < max_ports) {
3318 return OFPERR_OFPBAC_BAD_OUT_PORT;
3322 #define OFPUTIL_NAMED_PORTS \
3323 OFPUTIL_NAMED_PORT(IN_PORT) \
3324 OFPUTIL_NAMED_PORT(TABLE) \
3325 OFPUTIL_NAMED_PORT(NORMAL) \
3326 OFPUTIL_NAMED_PORT(FLOOD) \
3327 OFPUTIL_NAMED_PORT(ALL) \
3328 OFPUTIL_NAMED_PORT(CONTROLLER) \
3329 OFPUTIL_NAMED_PORT(LOCAL) \
3330 OFPUTIL_NAMED_PORT(NONE)
3332 /* Checks whether 's' is the string representation of an OpenFlow port number,
3333 * either as an integer or a string name (e.g. "LOCAL"). If it is, stores the
3334 * number in '*port' and returns true. Otherwise, returns false. */
3336 ofputil_port_from_string(const char *name, uint16_t *port)
3342 static const struct pair pairs[] = {
3343 #define OFPUTIL_NAMED_PORT(NAME) {#NAME, OFPP_##NAME},
3345 #undef OFPUTIL_NAMED_PORT
3347 static const int n_pairs = ARRAY_SIZE(pairs);
3350 if (str_to_int(name, 0, &i) && i >= 0 && i < UINT16_MAX) {
3355 for (i = 0; i < n_pairs; i++) {
3356 if (!strcasecmp(name, pairs[i].name)) {
3357 *port = pairs[i].value;
3364 /* Appends to 's' a string representation of the OpenFlow port number 'port'.
3365 * Most ports' string representation is just the port number, but for special
3366 * ports, e.g. OFPP_LOCAL, it is the name, e.g. "LOCAL". */
3368 ofputil_format_port(uint16_t port, struct ds *s)
3373 #define OFPUTIL_NAMED_PORT(NAME) case OFPP_##NAME: name = #NAME; break;
3375 #undef OFPUTIL_NAMED_PORT
3378 ds_put_format(s, "%"PRIu16, port);
3381 ds_put_cstr(s, name);
3384 /* Given a buffer 'b' that contains an array of OpenFlow ports of type
3385 * 'ofp_version', tries to pull the first element from the array. If
3386 * successful, initializes '*pp' with an abstract representation of the
3387 * port and returns 0. If no ports remain to be decoded, returns EOF.
3388 * On an error, returns a positive OFPERR_* value. */
3390 ofputil_pull_phy_port(uint8_t ofp_version, struct ofpbuf *b,
3391 struct ofputil_phy_port *pp)
3393 if (ofp_version == OFP10_VERSION) {
3394 const struct ofp10_phy_port *opp = ofpbuf_try_pull(b, sizeof *opp);
3395 return opp ? ofputil_decode_ofp10_phy_port(pp, opp) : EOF;
3397 const struct ofp11_port *op = ofpbuf_try_pull(b, sizeof *op);
3398 return op ? ofputil_decode_ofp11_port(pp, op) : EOF;
3402 /* Given a buffer 'b' that contains an array of OpenFlow ports of type
3403 * 'ofp_version', returns the number of elements. */
3404 size_t ofputil_count_phy_ports(uint8_t ofp_version, struct ofpbuf *b)
3406 return (ofp_version == OFP10_VERSION
3407 ? b->size / sizeof(struct ofp10_phy_port)
3408 : b->size / sizeof(struct ofp11_port));
3412 check_resubmit_table(const struct nx_action_resubmit *nar)
3414 if (nar->pad[0] || nar->pad[1] || nar->pad[2]) {
3415 return OFPERR_OFPBAC_BAD_ARGUMENT;
3421 check_output_reg(const struct nx_action_output_reg *naor,
3422 const struct flow *flow)
3424 struct mf_subfield src;
3427 for (i = 0; i < sizeof naor->zero; i++) {
3428 if (naor->zero[i]) {
3429 return OFPERR_OFPBAC_BAD_ARGUMENT;
3433 nxm_decode(&src, naor->src, naor->ofs_nbits);
3434 return mf_check_src(&src, flow);
3438 validate_actions(const union ofp_action *actions, size_t n_actions,
3439 const struct flow *flow, int max_ports)
3441 const union ofp_action *a;
3444 OFPUTIL_ACTION_FOR_EACH (a, left, actions, n_actions) {
3449 code = ofputil_decode_action(a);
3452 VLOG_WARN_RL(&bad_ofmsg_rl,
3453 "action decoding error at offset %td (%s)",
3454 (a - actions) * sizeof *a, ofperr_get_name(error));
3460 switch ((enum ofputil_action_code) code) {
3461 case OFPUTIL_OFPAT10_OUTPUT:
3462 error = ofputil_check_output_port(ntohs(a->output.port),
3466 case OFPUTIL_OFPAT10_SET_VLAN_VID:
3467 if (a->vlan_vid.vlan_vid & ~htons(0xfff)) {
3468 error = OFPERR_OFPBAC_BAD_ARGUMENT;
3472 case OFPUTIL_OFPAT10_SET_VLAN_PCP:
3473 if (a->vlan_pcp.vlan_pcp & ~7) {
3474 error = OFPERR_OFPBAC_BAD_ARGUMENT;
3478 case OFPUTIL_OFPAT10_ENQUEUE:
3479 port = ntohs(((const struct ofp_action_enqueue *) a)->port);
3480 if (port >= max_ports && port != OFPP_IN_PORT
3481 && port != OFPP_LOCAL) {
3482 error = OFPERR_OFPBAC_BAD_OUT_PORT;
3486 case OFPUTIL_NXAST_REG_MOVE:
3487 error = nxm_check_reg_move((const struct nx_action_reg_move *) a,
3491 case OFPUTIL_NXAST_REG_LOAD:
3492 error = nxm_check_reg_load((const struct nx_action_reg_load *) a,
3496 case OFPUTIL_NXAST_MULTIPATH:
3497 error = multipath_check((const struct nx_action_multipath *) a,
3501 case OFPUTIL_NXAST_AUTOPATH:
3502 error = autopath_check((const struct nx_action_autopath *) a,
3506 case OFPUTIL_NXAST_BUNDLE:
3507 case OFPUTIL_NXAST_BUNDLE_LOAD:
3508 error = bundle_check((const struct nx_action_bundle *) a,
3512 case OFPUTIL_NXAST_OUTPUT_REG:
3513 error = check_output_reg((const struct nx_action_output_reg *) a,
3517 case OFPUTIL_NXAST_RESUBMIT_TABLE:
3518 error = check_resubmit_table(
3519 (const struct nx_action_resubmit *) a);
3522 case OFPUTIL_NXAST_LEARN:
3523 error = learn_check((const struct nx_action_learn *) a, flow);
3526 case OFPUTIL_NXAST_CONTROLLER:
3527 if (((const struct nx_action_controller *) a)->zero) {
3528 error = OFPERR_NXBAC_MUST_BE_ZERO;
3532 case OFPUTIL_OFPAT10_STRIP_VLAN:
3533 case OFPUTIL_OFPAT10_SET_NW_SRC:
3534 case OFPUTIL_OFPAT10_SET_NW_DST:
3535 case OFPUTIL_OFPAT10_SET_NW_TOS:
3536 case OFPUTIL_OFPAT10_SET_TP_SRC:
3537 case OFPUTIL_OFPAT10_SET_TP_DST:
3538 case OFPUTIL_OFPAT10_SET_DL_SRC:
3539 case OFPUTIL_OFPAT10_SET_DL_DST:
3540 case OFPUTIL_NXAST_RESUBMIT:
3541 case OFPUTIL_NXAST_SET_TUNNEL:
3542 case OFPUTIL_NXAST_SET_QUEUE:
3543 case OFPUTIL_NXAST_POP_QUEUE:
3544 case OFPUTIL_NXAST_NOTE:
3545 case OFPUTIL_NXAST_SET_TUNNEL64:
3546 case OFPUTIL_NXAST_EXIT:
3547 case OFPUTIL_NXAST_DEC_TTL:
3548 case OFPUTIL_NXAST_FIN_TIMEOUT:
3553 VLOG_WARN_RL(&bad_ofmsg_rl, "bad action at offset %td (%s)",
3554 (a - actions) * sizeof *a, ofperr_get_name(error));
3559 VLOG_WARN_RL(&bad_ofmsg_rl, "bad action format at offset %zu",
3560 (n_actions - left) * sizeof *a);
3561 return OFPERR_OFPBAC_BAD_LEN;
3566 struct ofputil_action {
3568 unsigned int min_len;
3569 unsigned int max_len;
3572 static const struct ofputil_action action_bad_type
3573 = { -OFPERR_OFPBAC_BAD_TYPE, 0, UINT_MAX };
3574 static const struct ofputil_action action_bad_len
3575 = { -OFPERR_OFPBAC_BAD_LEN, 0, UINT_MAX };
3576 static const struct ofputil_action action_bad_vendor
3577 = { -OFPERR_OFPBAC_BAD_VENDOR, 0, UINT_MAX };
3579 static const struct ofputil_action *
3580 ofputil_decode_ofpat_action(const union ofp_action *a)
3582 enum ofp10_action_type type = ntohs(a->type);
3585 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
3587 static const struct ofputil_action action = { \
3589 sizeof(struct STRUCT), \
3590 sizeof(struct STRUCT) \
3594 #include "ofp-util.def"
3596 case OFPAT10_VENDOR:
3598 return &action_bad_type;
3602 static const struct ofputil_action *
3603 ofputil_decode_nxast_action(const union ofp_action *a)
3605 const struct nx_action_header *nah = (const struct nx_action_header *) a;
3606 enum nx_action_subtype subtype = ntohs(nah->subtype);
3609 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
3611 static const struct ofputil_action action = { \
3613 sizeof(struct STRUCT), \
3614 EXTENSIBLE ? UINT_MAX : sizeof(struct STRUCT) \
3618 #include "ofp-util.def"
3620 case NXAST_SNAT__OBSOLETE:
3621 case NXAST_DROP_SPOOFED_ARP__OBSOLETE:
3623 return &action_bad_type;
3627 /* Parses 'a' to determine its type. Returns a nonnegative OFPUTIL_OFPAT10_* or
3628 * OFPUTIL_NXAST_* constant if successful, otherwise a negative OFPERR_* error
3631 * The caller must have already verified that 'a''s length is correct (that is,
3632 * a->header.len is nonzero and a multiple of sizeof(union ofp_action) and no
3633 * longer than the amount of space allocated to 'a').
3635 * This function verifies that 'a''s length is correct for the type of action
3636 * that it represents. */
3638 ofputil_decode_action(const union ofp_action *a)
3640 const struct ofputil_action *action;
3641 uint16_t len = ntohs(a->header.len);
3643 if (a->type != htons(OFPAT10_VENDOR)) {
3644 action = ofputil_decode_ofpat_action(a);
3646 switch (ntohl(a->vendor.vendor)) {
3648 if (len < sizeof(struct nx_action_header)) {
3649 return -OFPERR_OFPBAC_BAD_LEN;
3651 action = ofputil_decode_nxast_action(a);
3654 action = &action_bad_vendor;
3659 return (len >= action->min_len && len <= action->max_len
3661 : -OFPERR_OFPBAC_BAD_LEN);
3664 /* Parses 'a' and returns its type as an OFPUTIL_OFPAT10_* or OFPUTIL_NXAST_*
3665 * constant. The caller must have already validated that 'a' is a valid action
3666 * understood by Open vSwitch (e.g. by a previous successful call to
3667 * ofputil_decode_action()). */
3668 enum ofputil_action_code
3669 ofputil_decode_action_unsafe(const union ofp_action *a)
3671 const struct ofputil_action *action;
3673 if (a->type != htons(OFPAT10_VENDOR)) {
3674 action = ofputil_decode_ofpat_action(a);
3676 action = ofputil_decode_nxast_action(a);
3679 return action->code;
3682 /* Returns the 'enum ofputil_action_code' corresponding to 'name' (e.g. if
3683 * 'name' is "output" then the return value is OFPUTIL_OFPAT10_OUTPUT), or -1 if
3684 * 'name' is not the name of any action.
3686 * ofp-util.def lists the mapping from names to action. */
3688 ofputil_action_code_from_name(const char *name)
3690 static const char *names[OFPUTIL_N_ACTIONS] = {
3691 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) NAME,
3692 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) NAME,
3693 #include "ofp-util.def"
3698 for (p = names; p < &names[ARRAY_SIZE(names)]; p++) {
3699 if (*p && !strcasecmp(name, *p)) {
3706 /* Appends an action of the type specified by 'code' to 'buf' and returns the
3707 * action. Initializes the parts of 'action' that identify it as having type
3708 * <ENUM> and length 'sizeof *action' and zeros the rest. For actions that
3709 * have variable length, the length used and cleared is that of struct
3712 ofputil_put_action(enum ofputil_action_code code, struct ofpbuf *buf)
3715 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
3716 case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
3717 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
3718 case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
3719 #include "ofp-util.def"
3724 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
3726 ofputil_init_##ENUM(struct STRUCT *s) \
3728 memset(s, 0, sizeof *s); \
3729 s->type = htons(ENUM); \
3730 s->len = htons(sizeof *s); \
3734 ofputil_put_##ENUM(struct ofpbuf *buf) \
3736 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
3737 ofputil_init_##ENUM(s); \
3740 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
3742 ofputil_init_##ENUM(struct STRUCT *s) \
3744 memset(s, 0, sizeof *s); \
3745 s->type = htons(OFPAT10_VENDOR); \
3746 s->len = htons(sizeof *s); \
3747 s->vendor = htonl(NX_VENDOR_ID); \
3748 s->subtype = htons(ENUM); \
3752 ofputil_put_##ENUM(struct ofpbuf *buf) \
3754 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
3755 ofputil_init_##ENUM(s); \
3758 #include "ofp-util.def"
3760 /* Returns true if 'action' outputs to 'port', false otherwise. */
3762 action_outputs_to_port(const union ofp_action *action, ovs_be16 port)
3764 switch (ntohs(action->type)) {
3765 case OFPAT10_OUTPUT:
3766 return action->output.port == port;
3767 case OFPAT10_ENQUEUE:
3768 return ((const struct ofp_action_enqueue *) action)->port == port;
3774 /* "Normalizes" the wildcards in 'rule'. That means:
3776 * 1. If the type of level N is known, then only the valid fields for that
3777 * level may be specified. For example, ARP does not have a TOS field,
3778 * so nw_tos must be wildcarded if 'rule' specifies an ARP flow.
3779 * Similarly, IPv4 does not have any IPv6 addresses, so ipv6_src and
3780 * ipv6_dst (and other fields) must be wildcarded if 'rule' specifies an
3783 * 2. If the type of level N is not known (or not understood by Open
3784 * vSwitch), then no fields at all for that level may be specified. For
3785 * example, Open vSwitch does not understand SCTP, an L4 protocol, so the
3786 * L4 fields tp_src and tp_dst must be wildcarded if 'rule' specifies an
3790 ofputil_normalize_rule(struct cls_rule *rule)
3793 MAY_NW_ADDR = 1 << 0, /* nw_src, nw_dst */
3794 MAY_TP_ADDR = 1 << 1, /* tp_src, tp_dst */
3795 MAY_NW_PROTO = 1 << 2, /* nw_proto */
3796 MAY_IPVx = 1 << 3, /* tos, frag, ttl */
3797 MAY_ARP_SHA = 1 << 4, /* arp_sha */
3798 MAY_ARP_THA = 1 << 5, /* arp_tha */
3799 MAY_IPV6 = 1 << 6, /* ipv6_src, ipv6_dst, ipv6_label */
3800 MAY_ND_TARGET = 1 << 7 /* nd_target */
3803 struct flow_wildcards wc;
3805 /* Figure out what fields may be matched. */
3806 if (rule->flow.dl_type == htons(ETH_TYPE_IP)) {
3807 may_match = MAY_NW_PROTO | MAY_IPVx | MAY_NW_ADDR;
3808 if (rule->flow.nw_proto == IPPROTO_TCP ||
3809 rule->flow.nw_proto == IPPROTO_UDP ||
3810 rule->flow.nw_proto == IPPROTO_ICMP) {
3811 may_match |= MAY_TP_ADDR;
3813 } else if (rule->flow.dl_type == htons(ETH_TYPE_IPV6)) {
3814 may_match = MAY_NW_PROTO | MAY_IPVx | MAY_IPV6;
3815 if (rule->flow.nw_proto == IPPROTO_TCP ||
3816 rule->flow.nw_proto == IPPROTO_UDP) {
3817 may_match |= MAY_TP_ADDR;
3818 } else if (rule->flow.nw_proto == IPPROTO_ICMPV6) {
3819 may_match |= MAY_TP_ADDR;
3820 if (rule->flow.tp_src == htons(ND_NEIGHBOR_SOLICIT)) {
3821 may_match |= MAY_ND_TARGET | MAY_ARP_SHA;
3822 } else if (rule->flow.tp_src == htons(ND_NEIGHBOR_ADVERT)) {
3823 may_match |= MAY_ND_TARGET | MAY_ARP_THA;
3826 } else if (rule->flow.dl_type == htons(ETH_TYPE_ARP)) {
3827 may_match = MAY_NW_PROTO | MAY_NW_ADDR | MAY_ARP_SHA | MAY_ARP_THA;
3832 /* Clear the fields that may not be matched. */
3834 if (!(may_match & MAY_NW_ADDR)) {
3835 wc.nw_src_mask = wc.nw_dst_mask = htonl(0);
3837 if (!(may_match & MAY_TP_ADDR)) {
3838 wc.tp_src_mask = wc.tp_dst_mask = htons(0);
3840 if (!(may_match & MAY_NW_PROTO)) {
3841 wc.wildcards |= FWW_NW_PROTO;
3843 if (!(may_match & MAY_IPVx)) {
3844 wc.wildcards |= FWW_NW_DSCP;
3845 wc.wildcards |= FWW_NW_ECN;
3846 wc.wildcards |= FWW_NW_TTL;
3848 if (!(may_match & MAY_ARP_SHA)) {
3849 wc.wildcards |= FWW_ARP_SHA;
3851 if (!(may_match & MAY_ARP_THA)) {
3852 wc.wildcards |= FWW_ARP_THA;
3854 if (!(may_match & MAY_IPV6)) {
3855 wc.ipv6_src_mask = wc.ipv6_dst_mask = in6addr_any;
3856 wc.wildcards |= FWW_IPV6_LABEL;
3858 if (!(may_match & MAY_ND_TARGET)) {
3859 wc.nd_target_mask = in6addr_any;
3862 /* Log any changes. */
3863 if (!flow_wildcards_equal(&wc, &rule->wc)) {
3864 bool log = !VLOG_DROP_INFO(&bad_ofmsg_rl);
3865 char *pre = log ? cls_rule_to_string(rule) : NULL;
3868 cls_rule_zero_wildcarded_fields(rule);
3871 char *post = cls_rule_to_string(rule);
3872 VLOG_INFO("normalization changed ofp_match, details:");
3873 VLOG_INFO(" pre: %s", pre);
3874 VLOG_INFO("post: %s", post);
3881 /* Attempts to pull 'actions_len' bytes from the front of 'b'. Returns 0 if
3882 * successful, otherwise an OpenFlow error.
3884 * If successful, the first action is stored in '*actionsp' and the number of
3885 * "union ofp_action" size elements into '*n_actionsp'. Otherwise NULL and 0
3886 * are stored, respectively.
3888 * This function does not check that the actions are valid (the caller should
3889 * do so, with validate_actions()). The caller is also responsible for making
3890 * sure that 'b->data' is initially aligned appropriately for "union
3893 ofputil_pull_actions(struct ofpbuf *b, unsigned int actions_len,
3894 union ofp_action **actionsp, size_t *n_actionsp)
3896 if (actions_len % OFP_ACTION_ALIGN != 0) {
3897 VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
3898 "is not a multiple of %d", actions_len, OFP_ACTION_ALIGN);
3902 *actionsp = ofpbuf_try_pull(b, actions_len);
3903 if (*actionsp == NULL) {
3904 VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
3905 "exceeds remaining message length (%zu)",
3906 actions_len, b->size);
3910 *n_actionsp = actions_len / OFP_ACTION_ALIGN;
3916 return OFPERR_OFPBRC_BAD_LEN;
3920 ofputil_actions_equal(const union ofp_action *a, size_t n_a,
3921 const union ofp_action *b, size_t n_b)
3923 return n_a == n_b && (!n_a || !memcmp(a, b, n_a * sizeof *a));
3927 ofputil_actions_clone(const union ofp_action *actions, size_t n)
3929 return n ? xmemdup(actions, n * sizeof *actions) : NULL;
3932 /* Parses a key or a key-value pair from '*stringp'.
3934 * On success: Stores the key into '*keyp'. Stores the value, if present, into
3935 * '*valuep', otherwise an empty string. Advances '*stringp' past the end of
3936 * the key-value pair, preparing it for another call. '*keyp' and '*valuep'
3937 * are substrings of '*stringp' created by replacing some of its bytes by null
3938 * terminators. Returns true.
3940 * If '*stringp' is just white space or commas, sets '*keyp' and '*valuep' to
3941 * NULL and returns false. */
3943 ofputil_parse_key_value(char **stringp, char **keyp, char **valuep)
3945 char *pos, *key, *value;
3949 pos += strspn(pos, ", \t\r\n");
3951 *keyp = *valuep = NULL;
3956 key_len = strcspn(pos, ":=(, \t\r\n");
3957 if (key[key_len] == ':' || key[key_len] == '=') {
3958 /* The value can be separated by a colon. */
3961 value = key + key_len + 1;
3962 value_len = strcspn(value, ", \t\r\n");
3963 pos = value + value_len + (value[value_len] != '\0');
3964 value[value_len] = '\0';
3965 } else if (key[key_len] == '(') {
3966 /* The value can be surrounded by balanced parentheses. The outermost
3967 * set of parentheses is removed. */
3971 value = key + key_len + 1;
3972 for (value_len = 0; level > 0; value_len++) {
3973 switch (value[value_len]) {
3987 value[value_len - 1] = '\0';
3988 pos = value + value_len;
3990 /* There might be no value at all. */
3991 value = key + key_len; /* Will become the empty string below. */
3992 pos = key + key_len + (key[key_len] != '\0');
3994 key[key_len] = '\0';