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-actions.h"
36 #include "ofp-errors.h"
41 #include "unaligned.h"
42 #include "type-props.h"
45 VLOG_DEFINE_THIS_MODULE(ofp_util);
47 /* Rate limit for OpenFlow message parse errors. These always indicate a bug
48 * in the peer and so there's not much point in showing a lot of them. */
49 static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5);
51 /* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns
52 * an IP netmask with a 1 in each bit that must match and a 0 in each bit that
55 * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0
56 * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits,
57 * ..., 32 and higher wildcard the entire field. This is the *opposite* of the
58 * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are
61 ofputil_wcbits_to_netmask(int wcbits)
64 return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0;
67 /* Given the IP netmask 'netmask', returns the number of bits of the IP address
68 * that it wildcards, that is, the number of 0-bits in 'netmask', a number
69 * between 0 and 32 inclusive.
71 * If 'netmask' is not a CIDR netmask (see ip_is_cidr()), the return value will
72 * still be in the valid range but isn't otherwise meaningful. */
74 ofputil_netmask_to_wcbits(ovs_be32 netmask)
76 return 32 - ip_count_cidr_bits(netmask);
79 /* A list of the FWW_* and OFPFW10_ bits that have the same value, meaning, and
81 #define WC_INVARIANT_LIST \
82 WC_INVARIANT_BIT(IN_PORT) \
83 WC_INVARIANT_BIT(DL_TYPE) \
84 WC_INVARIANT_BIT(NW_PROTO)
86 /* Verify that all of the invariant bits (as defined on WC_INVARIANT_LIST)
87 * actually have the same names and values. */
88 #define WC_INVARIANT_BIT(NAME) BUILD_ASSERT_DECL(FWW_##NAME == OFPFW10_##NAME);
90 #undef WC_INVARIANT_BIT
92 /* WC_INVARIANTS is the invariant bits (as defined on WC_INVARIANT_LIST) all
94 static const flow_wildcards_t WC_INVARIANTS = 0
95 #define WC_INVARIANT_BIT(NAME) | FWW_##NAME
97 #undef WC_INVARIANT_BIT
100 /* Converts the OpenFlow 1.0 wildcards in 'ofpfw' (OFPFW10_*) into a
101 * flow_wildcards in 'wc' for use in struct cls_rule. It is the caller's
102 * responsibility to handle the special case where the flow match's dl_vlan is
103 * set to OFP_VLAN_NONE. */
105 ofputil_wildcard_from_ofpfw10(uint32_t ofpfw, struct flow_wildcards *wc)
107 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 14);
109 /* Initialize most of rule->wc. */
110 flow_wildcards_init_catchall(wc);
111 wc->wildcards = (OVS_FORCE flow_wildcards_t) ofpfw & WC_INVARIANTS;
113 /* Wildcard fields that aren't defined by ofp10_match or tun_id. */
114 wc->wildcards |= FWW_NW_ECN | FWW_NW_TTL;
116 if (ofpfw & OFPFW10_NW_TOS) {
117 /* OpenFlow 1.0 defines a TOS wildcard, but it's much later in
118 * the enum than we can use. */
119 wc->wildcards |= FWW_NW_DSCP;
122 wc->nw_src_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW10_NW_SRC_SHIFT);
123 wc->nw_dst_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW10_NW_DST_SHIFT);
125 if (!(ofpfw & OFPFW10_TP_SRC)) {
126 wc->tp_src_mask = htons(UINT16_MAX);
128 if (!(ofpfw & OFPFW10_TP_DST)) {
129 wc->tp_dst_mask = htons(UINT16_MAX);
132 if (!(ofpfw & OFPFW10_DL_SRC)) {
133 memset(wc->dl_src_mask, 0xff, ETH_ADDR_LEN);
135 if (!(ofpfw & OFPFW10_DL_DST)) {
136 memset(wc->dl_dst_mask, 0xff, ETH_ADDR_LEN);
140 if (!(ofpfw & OFPFW10_DL_VLAN_PCP)) {
141 wc->vlan_tci_mask |= htons(VLAN_PCP_MASK | VLAN_CFI);
143 if (!(ofpfw & OFPFW10_DL_VLAN)) {
144 wc->vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI);
148 /* Converts the ofp10_match in 'match' into a cls_rule in 'rule', with the
149 * given 'priority'. */
151 ofputil_cls_rule_from_ofp10_match(const struct ofp10_match *match,
152 unsigned int priority, struct cls_rule *rule)
154 uint32_t ofpfw = ntohl(match->wildcards) & OFPFW10_ALL;
156 /* Initialize rule->priority, rule->wc. */
157 rule->priority = !ofpfw ? UINT16_MAX : priority;
158 ofputil_wildcard_from_ofpfw10(ofpfw, &rule->wc);
160 /* Initialize most of rule->flow. */
161 rule->flow.nw_src = match->nw_src;
162 rule->flow.nw_dst = match->nw_dst;
163 rule->flow.in_port = ntohs(match->in_port);
164 rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type);
165 rule->flow.tp_src = match->tp_src;
166 rule->flow.tp_dst = match->tp_dst;
167 memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN);
168 memcpy(rule->flow.dl_dst, match->dl_dst, ETH_ADDR_LEN);
169 rule->flow.nw_tos = match->nw_tos & IP_DSCP_MASK;
170 rule->flow.nw_proto = match->nw_proto;
172 /* Translate VLANs. */
173 if (!(ofpfw & OFPFW10_DL_VLAN) &&
174 match->dl_vlan == htons(OFP10_VLAN_NONE)) {
175 /* Match only packets without 802.1Q header.
177 * When OFPFW10_DL_VLAN_PCP is wildcarded, this is obviously correct.
179 * If OFPFW10_DL_VLAN_PCP is matched, the flow match is contradictory,
180 * because we can't have a specific PCP without an 802.1Q header.
181 * However, older versions of OVS treated this as matching packets
182 * withut an 802.1Q header, so we do here too. */
183 rule->flow.vlan_tci = htons(0);
184 rule->wc.vlan_tci_mask = htons(0xffff);
186 ovs_be16 vid, pcp, tci;
188 vid = match->dl_vlan & htons(VLAN_VID_MASK);
189 pcp = htons((match->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK);
190 tci = vid | pcp | htons(VLAN_CFI);
191 rule->flow.vlan_tci = tci & rule->wc.vlan_tci_mask;
195 cls_rule_zero_wildcarded_fields(rule);
198 /* Convert 'rule' into the OpenFlow 1.0 match structure 'match'. */
200 ofputil_cls_rule_to_ofp10_match(const struct cls_rule *rule,
201 struct ofp10_match *match)
203 const struct flow_wildcards *wc = &rule->wc;
206 /* Figure out most OpenFlow wildcards. */
207 ofpfw = (OVS_FORCE uint32_t) (wc->wildcards & WC_INVARIANTS);
208 ofpfw |= (ofputil_netmask_to_wcbits(wc->nw_src_mask)
209 << OFPFW10_NW_SRC_SHIFT);
210 ofpfw |= (ofputil_netmask_to_wcbits(wc->nw_dst_mask)
211 << OFPFW10_NW_DST_SHIFT);
212 if (wc->wildcards & FWW_NW_DSCP) {
213 ofpfw |= OFPFW10_NW_TOS;
215 if (!wc->tp_src_mask) {
216 ofpfw |= OFPFW10_TP_SRC;
218 if (!wc->tp_dst_mask) {
219 ofpfw |= OFPFW10_TP_DST;
221 if (eth_addr_is_zero(wc->dl_src_mask)) {
222 ofpfw |= OFPFW10_DL_SRC;
224 if (eth_addr_is_zero(wc->dl_dst_mask)) {
225 ofpfw |= OFPFW10_DL_DST;
228 /* Translate VLANs. */
229 match->dl_vlan = htons(0);
230 match->dl_vlan_pcp = 0;
231 if (rule->wc.vlan_tci_mask == htons(0)) {
232 ofpfw |= OFPFW10_DL_VLAN | OFPFW10_DL_VLAN_PCP;
233 } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI)
234 && !(rule->flow.vlan_tci & htons(VLAN_CFI))) {
235 match->dl_vlan = htons(OFP10_VLAN_NONE);
236 ofpfw |= OFPFW10_DL_VLAN_PCP;
238 if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) {
239 ofpfw |= OFPFW10_DL_VLAN;
241 match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci));
244 if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) {
245 ofpfw |= OFPFW10_DL_VLAN_PCP;
247 match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci);
251 /* Compose most of the match structure. */
252 match->wildcards = htonl(ofpfw);
253 match->in_port = htons(rule->flow.in_port);
254 memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
255 memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
256 match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
257 match->nw_src = rule->flow.nw_src;
258 match->nw_dst = rule->flow.nw_dst;
259 match->nw_tos = rule->flow.nw_tos & IP_DSCP_MASK;
260 match->nw_proto = rule->flow.nw_proto;
261 match->tp_src = rule->flow.tp_src;
262 match->tp_dst = rule->flow.tp_dst;
263 memset(match->pad1, '\0', sizeof match->pad1);
264 memset(match->pad2, '\0', sizeof match->pad2);
267 /* Converts the ofp11_match in 'match' into a cls_rule in 'rule', with the
268 * given 'priority'. Returns 0 if successful, otherwise an OFPERR_* value. */
270 ofputil_cls_rule_from_ofp11_match(const struct ofp11_match *match,
271 unsigned int priority,
272 struct cls_rule *rule)
274 uint16_t wc = ntohl(match->wildcards);
275 uint8_t dl_src_mask[ETH_ADDR_LEN];
276 uint8_t dl_dst_mask[ETH_ADDR_LEN];
280 cls_rule_init_catchall(rule, priority);
282 if (!(wc & OFPFW11_IN_PORT)) {
286 error = ofputil_port_from_ofp11(match->in_port, &ofp_port);
288 return OFPERR_OFPBMC_BAD_VALUE;
290 cls_rule_set_in_port(rule, ofp_port);
293 for (i = 0; i < ETH_ADDR_LEN; i++) {
294 dl_src_mask[i] = ~match->dl_src_mask[i];
296 cls_rule_set_dl_src_masked(rule, match->dl_src, dl_src_mask);
298 for (i = 0; i < ETH_ADDR_LEN; i++) {
299 dl_dst_mask[i] = ~match->dl_dst_mask[i];
301 cls_rule_set_dl_dst_masked(rule, match->dl_dst, dl_dst_mask);
303 if (!(wc & OFPFW11_DL_VLAN)) {
304 if (match->dl_vlan == htons(OFPVID11_NONE)) {
305 /* Match only packets without a VLAN tag. */
306 rule->flow.vlan_tci = htons(0);
307 rule->wc.vlan_tci_mask = htons(UINT16_MAX);
309 if (match->dl_vlan == htons(OFPVID11_ANY)) {
310 /* Match any packet with a VLAN tag regardless of VID. */
311 rule->flow.vlan_tci = htons(VLAN_CFI);
312 rule->wc.vlan_tci_mask = htons(VLAN_CFI);
313 } else if (ntohs(match->dl_vlan) < 4096) {
314 /* Match only packets with the specified VLAN VID. */
315 rule->flow.vlan_tci = htons(VLAN_CFI) | match->dl_vlan;
316 rule->wc.vlan_tci_mask = htons(VLAN_CFI | VLAN_VID_MASK);
319 return OFPERR_OFPBMC_BAD_VALUE;
322 if (!(wc & OFPFW11_DL_VLAN_PCP)) {
323 if (match->dl_vlan_pcp <= 7) {
324 rule->flow.vlan_tci |= htons(match->dl_vlan_pcp
326 rule->wc.vlan_tci_mask |= htons(VLAN_PCP_MASK);
329 return OFPERR_OFPBMC_BAD_VALUE;
335 if (!(wc & OFPFW11_DL_TYPE)) {
336 cls_rule_set_dl_type(rule,
337 ofputil_dl_type_from_openflow(match->dl_type));
340 ipv4 = rule->flow.dl_type == htons(ETH_TYPE_IP);
341 arp = rule->flow.dl_type == htons(ETH_TYPE_ARP);
343 if (ipv4 && !(wc & OFPFW11_NW_TOS)) {
344 if (match->nw_tos & ~IP_DSCP_MASK) {
346 return OFPERR_OFPBMC_BAD_VALUE;
349 cls_rule_set_nw_dscp(rule, match->nw_tos);
353 if (!(wc & OFPFW11_NW_PROTO)) {
354 cls_rule_set_nw_proto(rule, match->nw_proto);
356 cls_rule_set_nw_src_masked(rule, match->nw_src, ~match->nw_src_mask);
357 cls_rule_set_nw_dst_masked(rule, match->nw_dst, ~match->nw_dst_mask);
360 #define OFPFW11_TP_ALL (OFPFW11_TP_SRC | OFPFW11_TP_DST)
361 if (ipv4 && (wc & OFPFW11_TP_ALL) != OFPFW11_TP_ALL) {
362 switch (rule->flow.nw_proto) {
364 /* "A.2.3 Flow Match Structures" in OF1.1 says:
366 * The tp_src and tp_dst fields will be ignored unless the
367 * network protocol specified is as TCP, UDP or SCTP.
369 * but I'm pretty sure we should support ICMP too, otherwise
370 * that's a regression from OF1.0. */
371 if (!(wc & OFPFW11_TP_SRC)) {
372 uint16_t icmp_type = ntohs(match->tp_src);
373 if (icmp_type < 0x100) {
374 cls_rule_set_icmp_type(rule, icmp_type);
376 return OFPERR_OFPBMC_BAD_FIELD;
379 if (!(wc & OFPFW11_TP_DST)) {
380 uint16_t icmp_code = ntohs(match->tp_dst);
381 if (icmp_code < 0x100) {
382 cls_rule_set_icmp_code(rule, icmp_code);
384 return OFPERR_OFPBMC_BAD_FIELD;
391 if (!(wc & (OFPFW11_TP_SRC))) {
392 cls_rule_set_tp_src(rule, match->tp_src);
394 if (!(wc & (OFPFW11_TP_DST))) {
395 cls_rule_set_tp_dst(rule, match->tp_dst);
400 /* We don't support SCTP and it seems that we should tell the
401 * controller, since OF1.1 implementations are supposed to. */
402 return OFPERR_OFPBMC_BAD_FIELD;
405 /* OF1.1 says explicitly to ignore this. */
410 if (rule->flow.dl_type == htons(ETH_TYPE_MPLS) ||
411 rule->flow.dl_type == htons(ETH_TYPE_MPLS_MCAST)) {
412 enum { OFPFW11_MPLS_ALL = OFPFW11_MPLS_LABEL | OFPFW11_MPLS_TC };
414 if ((wc & OFPFW11_MPLS_ALL) != OFPFW11_MPLS_ALL) {
415 /* MPLS not supported. */
416 return OFPERR_OFPBMC_BAD_TAG;
420 if (match->metadata_mask != htonll(UINT64_MAX)) {
421 cls_rule_set_metadata_masked(rule, match->metadata,
422 ~match->metadata_mask);
428 /* Convert 'rule' into the OpenFlow 1.1 match structure 'match'. */
430 ofputil_cls_rule_to_ofp11_match(const struct cls_rule *rule,
431 struct ofp11_match *match)
436 memset(match, 0, sizeof *match);
437 match->omh.type = htons(OFPMT_STANDARD);
438 match->omh.length = htons(OFPMT11_STANDARD_LENGTH);
440 if (rule->wc.wildcards & FWW_IN_PORT) {
441 wc |= OFPFW11_IN_PORT;
443 match->in_port = ofputil_port_to_ofp11(rule->flow.in_port);
447 memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
448 for (i = 0; i < ETH_ADDR_LEN; i++) {
449 match->dl_src_mask[i] = ~rule->wc.dl_src_mask[i];
452 memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
453 for (i = 0; i < ETH_ADDR_LEN; i++) {
454 match->dl_dst_mask[i] = ~rule->wc.dl_dst_mask[i];
457 if (rule->wc.vlan_tci_mask == htons(0)) {
458 wc |= OFPFW11_DL_VLAN | OFPFW11_DL_VLAN_PCP;
459 } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI)
460 && !(rule->flow.vlan_tci & htons(VLAN_CFI))) {
461 match->dl_vlan = htons(OFPVID11_NONE);
462 wc |= OFPFW11_DL_VLAN_PCP;
464 if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) {
465 match->dl_vlan = htons(OFPVID11_ANY);
467 match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci));
470 if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) {
471 wc |= OFPFW11_DL_VLAN_PCP;
473 match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci);
477 if (rule->wc.wildcards & FWW_DL_TYPE) {
478 wc |= OFPFW11_DL_TYPE;
480 match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
483 if (rule->wc.wildcards & FWW_NW_DSCP) {
484 wc |= OFPFW11_NW_TOS;
486 match->nw_tos = rule->flow.nw_tos & IP_DSCP_MASK;
489 if (rule->wc.wildcards & FWW_NW_PROTO) {
490 wc |= OFPFW11_NW_PROTO;
492 match->nw_proto = rule->flow.nw_proto;
495 match->nw_src = rule->flow.nw_src;
496 match->nw_src_mask = ~rule->wc.nw_src_mask;
497 match->nw_dst = rule->flow.nw_dst;
498 match->nw_dst_mask = ~rule->wc.nw_dst_mask;
500 if (!rule->wc.tp_src_mask) {
501 wc |= OFPFW11_TP_SRC;
503 match->tp_src = rule->flow.tp_src;
506 if (!rule->wc.tp_dst_mask) {
507 wc |= OFPFW11_TP_DST;
509 match->tp_dst = rule->flow.tp_dst;
512 /* MPLS not supported. */
513 wc |= OFPFW11_MPLS_LABEL;
514 wc |= OFPFW11_MPLS_TC;
516 match->metadata = rule->flow.metadata;
517 match->metadata_mask = ~rule->wc.metadata_mask;
519 match->wildcards = htonl(wc);
522 /* Given a 'dl_type' value in the format used in struct flow, returns the
523 * corresponding 'dl_type' value for use in an ofp10_match or ofp11_match
526 ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type)
528 return (flow_dl_type == htons(FLOW_DL_TYPE_NONE)
529 ? htons(OFP_DL_TYPE_NOT_ETH_TYPE)
533 /* Given a 'dl_type' value in the format used in an ofp10_match or ofp11_match
534 * structure, returns the corresponding 'dl_type' value for use in struct
537 ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type)
539 return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)
540 ? htons(FLOW_DL_TYPE_NONE)
544 /* Returns a transaction ID to use for an outgoing OpenFlow message. */
548 static uint32_t next_xid = 1;
549 return htonl(next_xid++);
552 /* Basic parsing of OpenFlow messages. */
554 struct ofputil_msg_type {
555 enum ofputil_msg_code code; /* OFPUTIL_*. */
556 uint8_t ofp_version; /* An OpenFlow version or 0 for "any". */
557 uint32_t value; /* OFPT_*, OFPST_*, NXT_*, or NXST_*. */
558 const char *name; /* e.g. "OFPT_FLOW_REMOVED". */
559 unsigned int min_size; /* Minimum total message size in bytes. */
560 /* 0 if 'min_size' is the exact size that the message must be. Otherwise,
561 * the message may exceed 'min_size' by an even multiple of this value. */
562 unsigned int extra_multiple;
565 /* Represents a malformed OpenFlow message. */
566 static const struct ofputil_msg_type ofputil_invalid_type = {
567 OFPUTIL_MSG_INVALID, 0, 0, "OFPUTIL_MSG_INVALID", 0, 0
570 struct ofputil_msg_category {
571 const char *name; /* e.g. "OpenFlow message" */
572 const struct ofputil_msg_type *types;
574 enum ofperr missing_error; /* Error value for missing type. */
578 ofputil_check_length(const struct ofputil_msg_type *type, unsigned int size)
580 switch (type->extra_multiple) {
582 if (size != type->min_size) {
583 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
584 "length %u (expected length %u)",
585 type->name, size, type->min_size);
586 return OFPERR_OFPBRC_BAD_LEN;
591 if (size < type->min_size) {
592 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
593 "length %u (expected length at least %u bytes)",
594 type->name, size, type->min_size);
595 return OFPERR_OFPBRC_BAD_LEN;
600 if (size < type->min_size
601 || (size - type->min_size) % type->extra_multiple) {
602 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
603 "length %u (must be exactly %u bytes or longer "
604 "by an integer multiple of %u bytes)",
606 type->min_size, type->extra_multiple);
607 return OFPERR_OFPBRC_BAD_LEN;
614 ofputil_lookup_openflow_message(const struct ofputil_msg_category *cat,
615 uint8_t version, uint32_t value,
616 const struct ofputil_msg_type **typep)
618 const struct ofputil_msg_type *type;
620 for (type = cat->types; type < &cat->types[cat->n_types]; type++) {
621 if (type->value == value
622 && (!type->ofp_version || version == type->ofp_version)) {
628 VLOG_WARN_RL(&bad_ofmsg_rl, "received %s of unknown type %"PRIu32,
630 return cat->missing_error;
634 ofputil_decode_vendor(const struct ofp_header *oh, size_t length,
635 const struct ofputil_msg_type **typep)
637 static const struct ofputil_msg_type nxt_messages[] = {
638 { OFPUTIL_NXT_ROLE_REQUEST, OFP10_VERSION,
639 NXT_ROLE_REQUEST, "NXT_ROLE_REQUEST",
640 sizeof(struct nx_role_request), 0 },
642 { OFPUTIL_NXT_ROLE_REPLY, OFP10_VERSION,
643 NXT_ROLE_REPLY, "NXT_ROLE_REPLY",
644 sizeof(struct nx_role_request), 0 },
646 { OFPUTIL_NXT_SET_FLOW_FORMAT, OFP10_VERSION,
647 NXT_SET_FLOW_FORMAT, "NXT_SET_FLOW_FORMAT",
648 sizeof(struct nx_set_flow_format), 0 },
650 { OFPUTIL_NXT_SET_PACKET_IN_FORMAT, OFP10_VERSION,
651 NXT_SET_PACKET_IN_FORMAT, "NXT_SET_PACKET_IN_FORMAT",
652 sizeof(struct nx_set_packet_in_format), 0 },
654 { OFPUTIL_NXT_PACKET_IN, OFP10_VERSION,
655 NXT_PACKET_IN, "NXT_PACKET_IN",
656 sizeof(struct nx_packet_in), 1 },
658 { OFPUTIL_NXT_FLOW_MOD, OFP10_VERSION,
659 NXT_FLOW_MOD, "NXT_FLOW_MOD",
660 sizeof(struct nx_flow_mod), 8 },
662 { OFPUTIL_NXT_FLOW_REMOVED, OFP10_VERSION,
663 NXT_FLOW_REMOVED, "NXT_FLOW_REMOVED",
664 sizeof(struct nx_flow_removed), 8 },
666 { OFPUTIL_NXT_FLOW_MOD_TABLE_ID, OFP10_VERSION,
667 NXT_FLOW_MOD_TABLE_ID, "NXT_FLOW_MOD_TABLE_ID",
668 sizeof(struct nx_flow_mod_table_id), 0 },
670 { OFPUTIL_NXT_FLOW_AGE, OFP10_VERSION,
671 NXT_FLOW_AGE, "NXT_FLOW_AGE",
672 sizeof(struct nicira_header), 0 },
674 { OFPUTIL_NXT_SET_ASYNC_CONFIG, OFP10_VERSION,
675 NXT_SET_ASYNC_CONFIG, "NXT_SET_ASYNC_CONFIG",
676 sizeof(struct nx_async_config), 0 },
678 { OFPUTIL_NXT_SET_CONTROLLER_ID, OFP10_VERSION,
679 NXT_SET_CONTROLLER_ID, "NXT_SET_CONTROLLER_ID",
680 sizeof(struct nx_controller_id), 0 },
682 { OFPUTIL_NXT_FLOW_MONITOR_CANCEL, OFP10_VERSION,
683 NXT_FLOW_MONITOR_CANCEL, "NXT_FLOW_MONITOR_CANCEL",
684 sizeof(struct nx_flow_monitor_cancel), 0 },
686 { OFPUTIL_NXT_FLOW_MONITOR_PAUSED, OFP10_VERSION,
687 NXT_FLOW_MONITOR_PAUSED, "NXT_FLOW_MONITOR_PAUSED",
688 sizeof(struct nicira_header), 0 },
690 { OFPUTIL_NXT_FLOW_MONITOR_RESUMED, OFP10_VERSION,
691 NXT_FLOW_MONITOR_RESUMED, "NXT_FLOW_MONITOR_RESUMED",
692 sizeof(struct nicira_header), 0 },
695 static const struct ofputil_msg_category nxt_category = {
696 "Nicira extension message",
697 nxt_messages, ARRAY_SIZE(nxt_messages),
698 OFPERR_OFPBRC_BAD_SUBTYPE
701 const struct ofp_vendor_header *ovh;
702 const struct nicira_header *nh;
704 if (length < sizeof(struct ofp_vendor_header)) {
705 if (length == ntohs(oh->length)) {
706 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor message");
708 return OFPERR_OFPBRC_BAD_LEN;
711 ovh = (const struct ofp_vendor_header *) oh;
712 if (ovh->vendor != htonl(NX_VENDOR_ID)) {
713 VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor message for unknown "
714 "vendor %"PRIx32, ntohl(ovh->vendor));
715 return OFPERR_OFPBRC_BAD_VENDOR;
718 if (length < sizeof(struct nicira_header)) {
719 if (length == ntohs(oh->length)) {
720 VLOG_WARN_RL(&bad_ofmsg_rl, "received Nicira vendor message of "
721 "length %u (expected at least %zu)",
722 ntohs(ovh->header.length),
723 sizeof(struct nicira_header));
725 return OFPERR_OFPBRC_BAD_LEN;
728 nh = (const struct nicira_header *) oh;
729 return ofputil_lookup_openflow_message(&nxt_category, oh->version,
730 ntohl(nh->subtype), typep);
734 check_nxstats_msg(const struct ofp_header *oh, size_t length)
736 const struct ofp_stats_msg *osm = (const struct ofp_stats_msg *) oh;
739 if (length < sizeof(struct ofp_vendor_stats_msg)) {
740 if (length == ntohs(oh->length)) {
741 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor stats message");
743 return OFPERR_OFPBRC_BAD_LEN;
746 memcpy(&vendor, osm + 1, sizeof vendor);
747 if (vendor != htonl(NX_VENDOR_ID)) {
748 VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor stats message for "
749 "unknown vendor %"PRIx32, ntohl(vendor));
750 return OFPERR_OFPBRC_BAD_VENDOR;
753 if (length < sizeof(struct nicira_stats_msg)) {
754 if (length == ntohs(osm->header.length)) {
755 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated Nicira stats message");
757 return OFPERR_OFPBRC_BAD_LEN;
764 ofputil_decode_nxst_request(const struct ofp_header *oh, size_t length,
765 const struct ofputil_msg_type **typep)
767 static const struct ofputil_msg_type nxst_requests[] = {
768 { OFPUTIL_NXST_FLOW_REQUEST, OFP10_VERSION,
769 NXST_FLOW, "NXST_FLOW request",
770 sizeof(struct nx_flow_stats_request), 8 },
772 { OFPUTIL_NXST_AGGREGATE_REQUEST, OFP10_VERSION,
773 NXST_AGGREGATE, "NXST_AGGREGATE request",
774 sizeof(struct nx_aggregate_stats_request), 8 },
776 { OFPUTIL_NXST_FLOW_MONITOR_REQUEST, OFP10_VERSION,
777 NXST_FLOW_MONITOR, "NXST_FLOW_MONITOR request",
778 sizeof(struct nicira_stats_msg), 8 },
781 static const struct ofputil_msg_category nxst_request_category = {
782 "Nicira extension statistics request",
783 nxst_requests, ARRAY_SIZE(nxst_requests),
784 OFPERR_OFPBRC_BAD_SUBTYPE
787 const struct nicira_stats_msg *nsm;
790 error = check_nxstats_msg(oh, length);
795 nsm = (struct nicira_stats_msg *) oh;
796 return ofputil_lookup_openflow_message(&nxst_request_category, oh->version,
797 ntohl(nsm->subtype), typep);
801 ofputil_decode_nxst_reply(const struct ofp_header *oh, size_t length,
802 const struct ofputil_msg_type **typep)
804 static const struct ofputil_msg_type nxst_replies[] = {
805 { OFPUTIL_NXST_FLOW_REPLY, OFP10_VERSION,
806 NXST_FLOW, "NXST_FLOW reply",
807 sizeof(struct nicira_stats_msg), 8 },
809 { OFPUTIL_NXST_AGGREGATE_REPLY, OFP10_VERSION,
810 NXST_AGGREGATE, "NXST_AGGREGATE reply",
811 sizeof(struct nx_aggregate_stats_reply), 0 },
813 { OFPUTIL_NXST_FLOW_MONITOR_REPLY, OFP10_VERSION,
814 NXST_FLOW_MONITOR, "NXST_FLOW_MONITOR reply",
815 sizeof(struct nicira_stats_msg), 8 },
818 static const struct ofputil_msg_category nxst_reply_category = {
819 "Nicira extension statistics reply",
820 nxst_replies, ARRAY_SIZE(nxst_replies),
821 OFPERR_OFPBRC_BAD_SUBTYPE
824 const struct nicira_stats_msg *nsm;
827 error = check_nxstats_msg(oh, length);
832 nsm = (struct nicira_stats_msg *) oh;
833 return ofputil_lookup_openflow_message(&nxst_reply_category, oh->version,
834 ntohl(nsm->subtype), typep);
838 check_stats_msg(const struct ofp_header *oh, size_t length)
840 if (length < sizeof(struct ofp_stats_msg)) {
841 if (length == ntohs(oh->length)) {
842 VLOG_WARN_RL(&bad_ofmsg_rl, "truncated stats message");
844 return OFPERR_OFPBRC_BAD_LEN;
851 ofputil_decode_ofpst_request(const struct ofp_header *oh, size_t length,
852 const struct ofputil_msg_type **typep)
854 static const struct ofputil_msg_type ofpst_requests[] = {
855 { OFPUTIL_OFPST_DESC_REQUEST, OFP10_VERSION,
856 OFPST_DESC, "OFPST_DESC request",
857 sizeof(struct ofp_stats_msg), 0 },
859 { OFPUTIL_OFPST_FLOW_REQUEST, OFP10_VERSION,
860 OFPST_FLOW, "OFPST_FLOW request",
861 sizeof(struct ofp_flow_stats_request), 0 },
863 { OFPUTIL_OFPST_AGGREGATE_REQUEST, OFP10_VERSION,
864 OFPST_AGGREGATE, "OFPST_AGGREGATE request",
865 sizeof(struct ofp_flow_stats_request), 0 },
867 { OFPUTIL_OFPST_TABLE_REQUEST, OFP10_VERSION,
868 OFPST_TABLE, "OFPST_TABLE request",
869 sizeof(struct ofp_stats_msg), 0 },
871 { OFPUTIL_OFPST_PORT_REQUEST, OFP10_VERSION,
872 OFPST_PORT, "OFPST_PORT request",
873 sizeof(struct ofp_port_stats_request), 0 },
875 { OFPUTIL_OFPST_QUEUE_REQUEST, OFP10_VERSION,
876 OFPST_QUEUE, "OFPST_QUEUE request",
877 sizeof(struct ofp_queue_stats_request), 0 },
879 { OFPUTIL_OFPST_PORT_DESC_REQUEST, OFP10_VERSION,
880 OFPST_PORT_DESC, "OFPST_PORT_DESC request",
881 sizeof(struct ofp_stats_msg), 0 },
884 OFPST_VENDOR, "OFPST_VENDOR request",
885 sizeof(struct ofp_vendor_stats_msg), 1 },
888 static const struct ofputil_msg_category ofpst_request_category = {
889 "OpenFlow statistics",
890 ofpst_requests, ARRAY_SIZE(ofpst_requests),
891 OFPERR_OFPBRC_BAD_STAT
894 const struct ofp_stats_msg *request = (const struct ofp_stats_msg *) oh;
897 error = check_stats_msg(oh, length);
902 error = ofputil_lookup_openflow_message(&ofpst_request_category,
903 oh->version, ntohs(request->type),
905 if (!error && request->type == htons(OFPST_VENDOR)) {
906 error = ofputil_decode_nxst_request(oh, length, typep);
912 ofputil_decode_ofpst_reply(const struct ofp_header *oh, size_t length,
913 const struct ofputil_msg_type **typep)
915 static const struct ofputil_msg_type ofpst_replies[] = {
916 { OFPUTIL_OFPST_DESC_REPLY, OFP10_VERSION,
917 OFPST_DESC, "OFPST_DESC reply",
918 sizeof(struct ofp_desc_stats), 0 },
920 { OFPUTIL_OFPST_FLOW_REPLY, OFP10_VERSION,
921 OFPST_FLOW, "OFPST_FLOW reply",
922 sizeof(struct ofp_stats_msg), 1 },
924 { OFPUTIL_OFPST_AGGREGATE_REPLY, OFP10_VERSION,
925 OFPST_AGGREGATE, "OFPST_AGGREGATE reply",
926 sizeof(struct ofp_aggregate_stats_reply), 0 },
928 { OFPUTIL_OFPST_TABLE_REPLY, OFP10_VERSION,
929 OFPST_TABLE, "OFPST_TABLE reply",
930 sizeof(struct ofp_stats_msg), sizeof(struct ofp_table_stats) },
932 { OFPUTIL_OFPST_PORT_REPLY, OFP10_VERSION,
933 OFPST_PORT, "OFPST_PORT reply",
934 sizeof(struct ofp_stats_msg), sizeof(struct ofp_port_stats) },
936 { OFPUTIL_OFPST_QUEUE_REPLY, OFP10_VERSION,
937 OFPST_QUEUE, "OFPST_QUEUE reply",
938 sizeof(struct ofp_stats_msg), sizeof(struct ofp_queue_stats) },
940 { OFPUTIL_OFPST_PORT_DESC_REPLY, OFP10_VERSION,
941 OFPST_PORT_DESC, "OFPST_PORT_DESC reply",
942 sizeof(struct ofp_stats_msg), sizeof(struct ofp10_phy_port) },
945 OFPST_VENDOR, "OFPST_VENDOR reply",
946 sizeof(struct ofp_vendor_stats_msg), 1 },
949 static const struct ofputil_msg_category ofpst_reply_category = {
950 "OpenFlow statistics",
951 ofpst_replies, ARRAY_SIZE(ofpst_replies),
952 OFPERR_OFPBRC_BAD_STAT
955 const struct ofp_stats_msg *reply = (const struct ofp_stats_msg *) oh;
958 error = check_stats_msg(oh, length);
963 error = ofputil_lookup_openflow_message(&ofpst_reply_category, oh->version,
964 ntohs(reply->type), typep);
965 if (!error && reply->type == htons(OFPST_VENDOR)) {
966 error = ofputil_decode_nxst_reply(oh, length, typep);
972 ofputil_decode_msg_type__(const struct ofp_header *oh, size_t length,
973 const struct ofputil_msg_type **typep)
975 static const struct ofputil_msg_type ofpt_messages[] = {
976 { OFPUTIL_OFPT_HELLO, OFP10_VERSION,
977 OFPT_HELLO, "OFPT_HELLO",
978 sizeof(struct ofp_hello), 1 },
980 { OFPUTIL_OFPT_ERROR, 0,
981 OFPT_ERROR, "OFPT_ERROR",
982 sizeof(struct ofp_error_msg), 1 },
984 { OFPUTIL_OFPT_ECHO_REQUEST, OFP10_VERSION,
985 OFPT_ECHO_REQUEST, "OFPT_ECHO_REQUEST",
986 sizeof(struct ofp_header), 1 },
988 { OFPUTIL_OFPT_ECHO_REPLY, OFP10_VERSION,
989 OFPT_ECHO_REPLY, "OFPT_ECHO_REPLY",
990 sizeof(struct ofp_header), 1 },
992 { OFPUTIL_OFPT_FEATURES_REQUEST, OFP10_VERSION,
993 OFPT_FEATURES_REQUEST, "OFPT_FEATURES_REQUEST",
994 sizeof(struct ofp_header), 0 },
996 { OFPUTIL_OFPT_FEATURES_REPLY, OFP10_VERSION,
997 OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY",
998 sizeof(struct ofp_switch_features), sizeof(struct ofp10_phy_port) },
999 { OFPUTIL_OFPT_FEATURES_REPLY, OFP11_VERSION,
1000 OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY",
1001 sizeof(struct ofp_switch_features), sizeof(struct ofp11_port) },
1003 { OFPUTIL_OFPT_GET_CONFIG_REQUEST, OFP10_VERSION,
1004 OFPT_GET_CONFIG_REQUEST, "OFPT_GET_CONFIG_REQUEST",
1005 sizeof(struct ofp_header), 0 },
1007 { OFPUTIL_OFPT_GET_CONFIG_REPLY, OFP10_VERSION,
1008 OFPT_GET_CONFIG_REPLY, "OFPT_GET_CONFIG_REPLY",
1009 sizeof(struct ofp_switch_config), 0 },
1011 { OFPUTIL_OFPT_SET_CONFIG, OFP10_VERSION,
1012 OFPT_SET_CONFIG, "OFPT_SET_CONFIG",
1013 sizeof(struct ofp_switch_config), 0 },
1015 { OFPUTIL_OFPT_PACKET_IN, OFP10_VERSION,
1016 OFPT_PACKET_IN, "OFPT_PACKET_IN",
1017 offsetof(struct ofp_packet_in, data), 1 },
1019 { OFPUTIL_OFPT_FLOW_REMOVED, OFP10_VERSION,
1020 OFPT_FLOW_REMOVED, "OFPT_FLOW_REMOVED",
1021 sizeof(struct ofp_flow_removed), 0 },
1023 { OFPUTIL_OFPT_PORT_STATUS, OFP10_VERSION,
1024 OFPT_PORT_STATUS, "OFPT_PORT_STATUS",
1025 sizeof(struct ofp_port_status) + sizeof(struct ofp10_phy_port), 0 },
1026 { OFPUTIL_OFPT_PORT_STATUS, OFP11_VERSION,
1027 OFPT_PORT_STATUS, "OFPT_PORT_STATUS",
1028 sizeof(struct ofp_port_status) + sizeof(struct ofp11_port), 0 },
1030 { OFPUTIL_OFPT_PACKET_OUT, OFP10_VERSION,
1031 OFPT_PACKET_OUT, "OFPT_PACKET_OUT",
1032 sizeof(struct ofp_packet_out), 1 },
1034 { OFPUTIL_OFPT_FLOW_MOD, OFP10_VERSION,
1035 OFPT_FLOW_MOD, "OFPT_FLOW_MOD",
1036 sizeof(struct ofp_flow_mod), 1 },
1038 { OFPUTIL_OFPT_PORT_MOD, OFP10_VERSION,
1039 OFPT10_PORT_MOD, "OFPT_PORT_MOD",
1040 sizeof(struct ofp10_port_mod), 0 },
1041 { OFPUTIL_OFPT_PORT_MOD, OFP11_VERSION,
1042 OFPT11_PORT_MOD, "OFPT_PORT_MOD",
1043 sizeof(struct ofp11_port_mod), 0 },
1046 OFPT10_STATS_REQUEST, "OFPT_STATS_REQUEST",
1047 sizeof(struct ofp_stats_msg), 1 },
1050 OFPT10_STATS_REPLY, "OFPT_STATS_REPLY",
1051 sizeof(struct ofp_stats_msg), 1 },
1053 { OFPUTIL_OFPT_BARRIER_REQUEST, OFP10_VERSION,
1054 OFPT10_BARRIER_REQUEST, "OFPT_BARRIER_REQUEST",
1055 sizeof(struct ofp_header), 0 },
1057 { OFPUTIL_OFPT_BARRIER_REPLY, OFP10_VERSION,
1058 OFPT10_BARRIER_REPLY, "OFPT_BARRIER_REPLY",
1059 sizeof(struct ofp_header), 0 },
1062 OFPT_VENDOR, "OFPT_VENDOR",
1063 sizeof(struct ofp_vendor_header), 1 },
1066 static const struct ofputil_msg_category ofpt_category = {
1068 ofpt_messages, ARRAY_SIZE(ofpt_messages),
1069 OFPERR_OFPBRC_BAD_TYPE
1074 error = ofputil_lookup_openflow_message(&ofpt_category, oh->version,
1077 switch ((oh->version << 8) | oh->type) {
1078 case (OFP10_VERSION << 8) | OFPT_VENDOR:
1079 case (OFP11_VERSION << 8) | OFPT_VENDOR:
1080 error = ofputil_decode_vendor(oh, length, typep);
1083 case (OFP10_VERSION << 8) | OFPT10_STATS_REQUEST:
1084 case (OFP11_VERSION << 8) | OFPT11_STATS_REQUEST:
1085 error = ofputil_decode_ofpst_request(oh, length, typep);
1088 case (OFP10_VERSION << 8) | OFPT10_STATS_REPLY:
1089 case (OFP11_VERSION << 8) | OFPT11_STATS_REPLY:
1090 error = ofputil_decode_ofpst_reply(oh, length, typep);
1099 /* Decodes the message type represented by 'oh'. Returns 0 if successful or an
1100 * OpenFlow error code on failure. Either way, stores in '*typep' a type
1101 * structure that can be inspected with the ofputil_msg_type_*() functions.
1103 * oh->length must indicate the correct length of the message (and must be at
1104 * least sizeof(struct ofp_header)).
1106 * Success indicates that 'oh' is at least as long as the minimum-length
1107 * message of its type. */
1109 ofputil_decode_msg_type(const struct ofp_header *oh,
1110 const struct ofputil_msg_type **typep)
1112 size_t length = ntohs(oh->length);
1115 error = ofputil_decode_msg_type__(oh, length, typep);
1117 error = ofputil_check_length(*typep, length);
1120 *typep = &ofputil_invalid_type;
1125 /* Decodes the message type represented by 'oh', of which only the first
1126 * 'length' bytes are available. Returns 0 if successful or an OpenFlow error
1127 * code on failure. Either way, stores in '*typep' a type structure that can
1128 * be inspected with the ofputil_msg_type_*() functions. */
1130 ofputil_decode_msg_type_partial(const struct ofp_header *oh, size_t length,
1131 const struct ofputil_msg_type **typep)
1135 error = (length >= sizeof *oh
1136 ? ofputil_decode_msg_type__(oh, length, typep)
1137 : OFPERR_OFPBRC_BAD_LEN);
1139 *typep = &ofputil_invalid_type;
1144 /* Returns an OFPUTIL_* message type code for 'type'. */
1145 enum ofputil_msg_code
1146 ofputil_msg_type_code(const struct ofputil_msg_type *type)
1153 struct proto_abbrev {
1154 enum ofputil_protocol protocol;
1158 /* Most users really don't care about some of the differences between
1159 * protocols. These abbreviations help with that. */
1160 static const struct proto_abbrev proto_abbrevs[] = {
1161 { OFPUTIL_P_ANY, "any" },
1162 { OFPUTIL_P_OF10_ANY, "OpenFlow10" },
1163 { OFPUTIL_P_NXM_ANY, "NXM" },
1165 #define N_PROTO_ABBREVS ARRAY_SIZE(proto_abbrevs)
1167 enum ofputil_protocol ofputil_flow_dump_protocols[] = {
1171 size_t ofputil_n_flow_dump_protocols = ARRAY_SIZE(ofputil_flow_dump_protocols);
1173 /* Returns the ofputil_protocol that is initially in effect on an OpenFlow
1174 * connection that has negotiated the given 'version'. 'version' should
1175 * normally be an 8-bit OpenFlow version identifier (e.g. 0x01 for OpenFlow
1176 * 1.0, 0x02 for OpenFlow 1.1). Returns 0 if 'version' is not supported or
1177 * outside the valid range. */
1178 enum ofputil_protocol
1179 ofputil_protocol_from_ofp_version(int version)
1182 case OFP10_VERSION: return OFPUTIL_P_OF10;
1183 case OFP12_VERSION: return OFPUTIL_P_OF12;
1188 /* Returns the OpenFlow protocol version number (e.g. OFP10_VERSION,
1189 * OFP11_VERSION or OFP12_VERSION) that corresponds to 'protocol'. */
1191 ofputil_protocol_to_ofp_version(enum ofputil_protocol protocol)
1194 case OFPUTIL_P_OF10:
1195 case OFPUTIL_P_OF10_TID:
1197 case OFPUTIL_P_NXM_TID:
1198 return OFP10_VERSION;
1199 case OFPUTIL_P_OF12:
1200 return OFP12_VERSION;
1206 /* Returns true if 'protocol' is a single OFPUTIL_P_* value, false
1209 ofputil_protocol_is_valid(enum ofputil_protocol protocol)
1211 return protocol & OFPUTIL_P_ANY && is_pow2(protocol);
1214 /* Returns the equivalent of 'protocol' with the Nicira flow_mod_table_id
1215 * extension turned on or off if 'enable' is true or false, respectively.
1217 * This extension is only useful for protocols whose "standard" version does
1218 * not allow specific tables to be modified. In particular, this is true of
1219 * OpenFlow 1.0. In later versions of OpenFlow, a flow_mod request always
1220 * specifies a table ID and so there is no need for such an extension. When
1221 * 'protocol' is such a protocol that doesn't need a flow_mod_table_id
1222 * extension, this function just returns its 'protocol' argument unchanged
1223 * regardless of the value of 'enable'. */
1224 enum ofputil_protocol
1225 ofputil_protocol_set_tid(enum ofputil_protocol protocol, bool enable)
1228 case OFPUTIL_P_OF10:
1229 case OFPUTIL_P_OF10_TID:
1230 return enable ? OFPUTIL_P_OF10_TID : OFPUTIL_P_OF10;
1233 case OFPUTIL_P_NXM_TID:
1234 return enable ? OFPUTIL_P_NXM_TID : OFPUTIL_P_NXM;
1236 case OFPUTIL_P_OF12:
1237 return OFPUTIL_P_OF12;
1244 /* Returns the "base" version of 'protocol'. That is, if 'protocol' includes
1245 * some extension to a standard protocol version, the return value is the
1246 * standard version of that protocol without any extension. If 'protocol' is a
1247 * standard protocol version, returns 'protocol' unchanged. */
1248 enum ofputil_protocol
1249 ofputil_protocol_to_base(enum ofputil_protocol protocol)
1251 return ofputil_protocol_set_tid(protocol, false);
1254 /* Returns 'new_base' with any extensions taken from 'cur'. */
1255 enum ofputil_protocol
1256 ofputil_protocol_set_base(enum ofputil_protocol cur,
1257 enum ofputil_protocol new_base)
1259 bool tid = (cur & OFPUTIL_P_TID) != 0;
1262 case OFPUTIL_P_OF10:
1263 case OFPUTIL_P_OF10_TID:
1264 return ofputil_protocol_set_tid(OFPUTIL_P_OF10, tid);
1267 case OFPUTIL_P_NXM_TID:
1268 return ofputil_protocol_set_tid(OFPUTIL_P_NXM, tid);
1270 case OFPUTIL_P_OF12:
1271 return ofputil_protocol_set_tid(OFPUTIL_P_OF12, tid);
1278 /* Returns a string form of 'protocol', if a simple form exists (that is, if
1279 * 'protocol' is either a single protocol or it is a combination of protocols
1280 * that have a single abbreviation). Otherwise, returns NULL. */
1282 ofputil_protocol_to_string(enum ofputil_protocol protocol)
1284 const struct proto_abbrev *p;
1286 /* Use a "switch" statement for single-bit names so that we get a compiler
1287 * warning if we forget any. */
1290 return "NXM-table_id";
1292 case OFPUTIL_P_NXM_TID:
1293 return "NXM+table_id";
1295 case OFPUTIL_P_OF10:
1296 return "OpenFlow10-table_id";
1298 case OFPUTIL_P_OF10_TID:
1299 return "OpenFlow10+table_id";
1301 case OFPUTIL_P_OF12:
1305 /* Check abbreviations. */
1306 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
1307 if (protocol == p->protocol) {
1315 /* Returns a string that represents 'protocols'. The return value might be a
1316 * comma-separated list if 'protocols' doesn't have a simple name. The return
1317 * value is "none" if 'protocols' is 0.
1319 * The caller must free the returned string (with free()). */
1321 ofputil_protocols_to_string(enum ofputil_protocol protocols)
1325 assert(!(protocols & ~OFPUTIL_P_ANY));
1326 if (protocols == 0) {
1327 return xstrdup("none");
1332 const struct proto_abbrev *p;
1336 ds_put_char(&s, ',');
1339 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
1340 if ((protocols & p->protocol) == p->protocol) {
1341 ds_put_cstr(&s, p->name);
1342 protocols &= ~p->protocol;
1347 for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
1348 enum ofputil_protocol bit = 1u << i;
1350 if (protocols & bit) {
1351 ds_put_cstr(&s, ofputil_protocol_to_string(bit));
1360 return ds_steal_cstr(&s);
1363 static enum ofputil_protocol
1364 ofputil_protocol_from_string__(const char *s, size_t n)
1366 const struct proto_abbrev *p;
1369 for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
1370 enum ofputil_protocol bit = 1u << i;
1371 const char *name = ofputil_protocol_to_string(bit);
1373 if (name && n == strlen(name) && !strncasecmp(s, name, n)) {
1378 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
1379 if (n == strlen(p->name) && !strncasecmp(s, p->name, n)) {
1387 /* Returns the nonempty set of protocols represented by 's', which can be a
1388 * single protocol name or abbreviation or a comma-separated list of them.
1390 * Aborts the program with an error message if 's' is invalid. */
1391 enum ofputil_protocol
1392 ofputil_protocols_from_string(const char *s)
1394 const char *orig_s = s;
1395 enum ofputil_protocol protocols;
1399 enum ofputil_protocol p;
1402 n = strcspn(s, ",");
1408 p = ofputil_protocol_from_string__(s, n);
1410 ovs_fatal(0, "%.*s: unknown flow protocol", (int) n, s);
1418 ovs_fatal(0, "%s: no flow protocol specified", orig_s);
1424 ofputil_packet_in_format_is_valid(enum nx_packet_in_format packet_in_format)
1426 switch (packet_in_format) {
1427 case NXPIF_OPENFLOW10:
1436 ofputil_packet_in_format_to_string(enum nx_packet_in_format packet_in_format)
1438 switch (packet_in_format) {
1439 case NXPIF_OPENFLOW10:
1440 return "openflow10";
1449 ofputil_packet_in_format_from_string(const char *s)
1451 return (!strcmp(s, "openflow10") ? NXPIF_OPENFLOW10
1452 : !strcmp(s, "nxm") ? NXPIF_NXM
1457 regs_fully_wildcarded(const struct flow_wildcards *wc)
1461 for (i = 0; i < FLOW_N_REGS; i++) {
1462 if (wc->reg_masks[i] != 0) {
1469 /* Returns a bit-mask of ofputil_protocols that can be used for sending 'rule'
1470 * to a switch (e.g. to add or remove a flow). Only NXM can handle tunnel IDs,
1471 * registers, or fixing the Ethernet multicast bit. Otherwise, it's better to
1472 * use OpenFlow 1.0 protocol for backward compatibility. */
1473 enum ofputil_protocol
1474 ofputil_usable_protocols(const struct cls_rule *rule)
1476 const struct flow_wildcards *wc = &rule->wc;
1478 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 14);
1480 /* NXM and OF1.1+ supports bitwise matching on ethernet addresses. */
1481 if (!eth_mask_is_exact(wc->dl_src_mask)
1482 && !eth_addr_is_zero(wc->dl_src_mask)) {
1483 return OFPUTIL_P_NXM_ANY;
1485 if (!eth_mask_is_exact(wc->dl_dst_mask)
1486 && !eth_addr_is_zero(wc->dl_dst_mask)) {
1487 return OFPUTIL_P_NXM_ANY;
1490 /* NXM and OF1.1+ support matching metadata. */
1491 if (wc->metadata_mask != htonll(0)) {
1492 return OFPUTIL_P_NXM_ANY;
1495 /* Only NXM supports matching ARP hardware addresses. */
1496 if (!eth_addr_is_zero(wc->arp_sha_mask) ||
1497 !eth_addr_is_zero(wc->arp_tha_mask)) {
1498 return OFPUTIL_P_NXM_ANY;
1501 /* Only NXM supports matching IPv6 traffic. */
1502 if (!(wc->wildcards & FWW_DL_TYPE)
1503 && (rule->flow.dl_type == htons(ETH_TYPE_IPV6))) {
1504 return OFPUTIL_P_NXM_ANY;
1507 /* Only NXM supports matching registers. */
1508 if (!regs_fully_wildcarded(wc)) {
1509 return OFPUTIL_P_NXM_ANY;
1512 /* Only NXM supports matching tun_id. */
1513 if (wc->tun_id_mask != htonll(0)) {
1514 return OFPUTIL_P_NXM_ANY;
1517 /* Only NXM supports matching fragments. */
1518 if (wc->nw_frag_mask) {
1519 return OFPUTIL_P_NXM_ANY;
1522 /* Only NXM supports matching IPv6 flow label. */
1523 if (wc->ipv6_label_mask) {
1524 return OFPUTIL_P_NXM_ANY;
1527 /* Only NXM supports matching IP ECN bits. */
1528 if (!(wc->wildcards & FWW_NW_ECN)) {
1529 return OFPUTIL_P_NXM_ANY;
1532 /* Only NXM supports matching IP TTL/hop limit. */
1533 if (!(wc->wildcards & FWW_NW_TTL)) {
1534 return OFPUTIL_P_NXM_ANY;
1537 /* Only NXM supports non-CIDR IPv4 address masks. */
1538 if (!ip_is_cidr(wc->nw_src_mask) || !ip_is_cidr(wc->nw_dst_mask)) {
1539 return OFPUTIL_P_NXM_ANY;
1542 /* Only NXM supports bitwise matching on transport port. */
1543 if ((wc->tp_src_mask && wc->tp_src_mask != htons(UINT16_MAX)) ||
1544 (wc->tp_dst_mask && wc->tp_dst_mask != htons(UINT16_MAX))) {
1545 return OFPUTIL_P_NXM_ANY;
1548 /* Other formats can express this rule. */
1549 return OFPUTIL_P_ANY;
1552 /* Returns an OpenFlow message that, sent on an OpenFlow connection whose
1553 * protocol is 'current', at least partly transitions the protocol to 'want'.
1554 * Stores in '*next' the protocol that will be in effect on the OpenFlow
1555 * connection if the switch processes the returned message correctly. (If
1556 * '*next != want' then the caller will have to iterate.)
1558 * If 'current == want', returns NULL and stores 'current' in '*next'. */
1560 ofputil_encode_set_protocol(enum ofputil_protocol current,
1561 enum ofputil_protocol want,
1562 enum ofputil_protocol *next)
1564 enum ofputil_protocol cur_base, want_base;
1565 bool cur_tid, want_tid;
1567 cur_base = ofputil_protocol_to_base(current);
1568 want_base = ofputil_protocol_to_base(want);
1569 if (cur_base != want_base) {
1570 *next = ofputil_protocol_set_base(current, want_base);
1572 switch (want_base) {
1574 return ofputil_encode_nx_set_flow_format(NXFF_NXM);
1576 case OFPUTIL_P_OF10:
1577 return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW10);
1579 case OFPUTIL_P_OF12:
1580 return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW12);
1582 case OFPUTIL_P_OF10_TID:
1583 case OFPUTIL_P_NXM_TID:
1588 cur_tid = (current & OFPUTIL_P_TID) != 0;
1589 want_tid = (want & OFPUTIL_P_TID) != 0;
1590 if (cur_tid != want_tid) {
1591 *next = ofputil_protocol_set_tid(current, want_tid);
1592 return ofputil_make_flow_mod_table_id(want_tid);
1595 assert(current == want);
1601 /* Returns an NXT_SET_FLOW_FORMAT message that can be used to set the flow
1602 * format to 'nxff'. */
1604 ofputil_encode_nx_set_flow_format(enum nx_flow_format nxff)
1606 struct nx_set_flow_format *sff;
1609 assert(ofputil_nx_flow_format_is_valid(nxff));
1611 sff = make_nxmsg(sizeof *sff, NXT_SET_FLOW_FORMAT, &msg);
1612 sff->format = htonl(nxff);
1617 /* Returns the base protocol if 'flow_format' is a valid NXFF_* value, false
1619 enum ofputil_protocol
1620 ofputil_nx_flow_format_to_protocol(enum nx_flow_format flow_format)
1622 switch (flow_format) {
1623 case NXFF_OPENFLOW10:
1624 return OFPUTIL_P_OF10;
1627 return OFPUTIL_P_NXM;
1629 case NXFF_OPENFLOW12:
1630 return OFPUTIL_P_OF12;
1637 /* Returns true if 'flow_format' is a valid NXFF_* value, false otherwise. */
1639 ofputil_nx_flow_format_is_valid(enum nx_flow_format flow_format)
1641 return ofputil_nx_flow_format_to_protocol(flow_format) != 0;
1644 /* Returns a string version of 'flow_format', which must be a valid NXFF_*
1647 ofputil_nx_flow_format_to_string(enum nx_flow_format flow_format)
1649 switch (flow_format) {
1650 case NXFF_OPENFLOW10:
1651 return "openflow10";
1654 case NXFF_OPENFLOW12:
1655 return "openflow12";
1662 ofputil_make_set_packet_in_format(enum nx_packet_in_format packet_in_format)
1664 struct nx_set_packet_in_format *spif;
1667 spif = make_nxmsg(sizeof *spif, NXT_SET_PACKET_IN_FORMAT, &msg);
1668 spif->format = htonl(packet_in_format);
1673 /* Returns an OpenFlow message that can be used to turn the flow_mod_table_id
1674 * extension on or off (according to 'flow_mod_table_id'). */
1676 ofputil_make_flow_mod_table_id(bool flow_mod_table_id)
1678 struct nx_flow_mod_table_id *nfmti;
1681 nfmti = make_nxmsg(sizeof *nfmti, NXT_FLOW_MOD_TABLE_ID, &msg);
1682 nfmti->set = flow_mod_table_id;
1686 /* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract
1687 * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error
1690 * Uses 'ofpacts' to store the abstract OFPACT_* version of 'oh''s actions.
1691 * The caller must initialize 'ofpacts' and retains ownership of it.
1692 * 'fm->ofpacts' will point into the 'ofpacts' buffer.
1694 * Does not validate the flow_mod actions. The caller should do that, with
1695 * ofpacts_check(). */
1697 ofputil_decode_flow_mod(struct ofputil_flow_mod *fm,
1698 const struct ofp_header *oh,
1699 enum ofputil_protocol protocol,
1700 struct ofpbuf *ofpacts)
1702 const struct ofputil_msg_type *type;
1706 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1708 ofputil_decode_msg_type(oh, &type);
1709 if (ofputil_msg_type_code(type) == OFPUTIL_OFPT_FLOW_MOD) {
1710 /* Standard OpenFlow flow_mod. */
1711 const struct ofp_flow_mod *ofm;
1715 /* Get the ofp_flow_mod. */
1716 ofm = ofpbuf_pull(&b, sizeof *ofm);
1718 /* Set priority based on original wildcards. Normally we'd allow
1719 * ofputil_cls_rule_from_match() to do this for us, but
1720 * ofputil_normalize_rule() can put wildcards where the original flow
1721 * didn't have them. */
1722 priority = ntohs(ofm->priority);
1723 if (!(ofm->match.wildcards & htonl(OFPFW10_ALL))) {
1724 priority = UINT16_MAX;
1727 /* Translate the rule. */
1728 ofputil_cls_rule_from_ofp10_match(&ofm->match, priority, &fm->cr);
1729 ofputil_normalize_rule(&fm->cr);
1731 /* Now get the actions. */
1732 error = ofpacts_pull_openflow10(&b, b.size, ofpacts);
1737 /* Translate the message. */
1738 command = ntohs(ofm->command);
1739 fm->cookie = htonll(0);
1740 fm->cookie_mask = htonll(0);
1741 fm->new_cookie = ofm->cookie;
1742 fm->idle_timeout = ntohs(ofm->idle_timeout);
1743 fm->hard_timeout = ntohs(ofm->hard_timeout);
1744 fm->buffer_id = ntohl(ofm->buffer_id);
1745 fm->out_port = ntohs(ofm->out_port);
1746 fm->flags = ntohs(ofm->flags);
1747 } else if (ofputil_msg_type_code(type) == OFPUTIL_NXT_FLOW_MOD) {
1748 /* Nicira extended flow_mod. */
1749 const struct nx_flow_mod *nfm;
1752 /* Dissect the message. */
1753 nfm = ofpbuf_pull(&b, sizeof *nfm);
1754 error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority),
1755 &fm->cr, &fm->cookie, &fm->cookie_mask);
1759 error = ofpacts_pull_openflow10(&b, b.size, ofpacts);
1764 /* Translate the message. */
1765 command = ntohs(nfm->command);
1766 if ((command & 0xff) == OFPFC_ADD && fm->cookie_mask) {
1767 /* Flow additions may only set a new cookie, not match an
1768 * existing cookie. */
1769 return OFPERR_NXBRC_NXM_INVALID;
1771 fm->new_cookie = nfm->cookie;
1772 fm->idle_timeout = ntohs(nfm->idle_timeout);
1773 fm->hard_timeout = ntohs(nfm->hard_timeout);
1774 fm->buffer_id = ntohl(nfm->buffer_id);
1775 fm->out_port = ntohs(nfm->out_port);
1776 fm->flags = ntohs(nfm->flags);
1781 fm->ofpacts = ofpacts->data;
1782 fm->ofpacts_len = ofpacts->size;
1783 if (protocol & OFPUTIL_P_TID) {
1784 fm->command = command & 0xff;
1785 fm->table_id = command >> 8;
1787 fm->command = command;
1788 fm->table_id = 0xff;
1794 /* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to
1795 * 'protocol' and returns the message. */
1797 ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm,
1798 enum ofputil_protocol protocol)
1800 struct ofp_flow_mod *ofm;
1801 struct nx_flow_mod *nfm;
1806 command = (protocol & OFPUTIL_P_TID
1807 ? (fm->command & 0xff) | (fm->table_id << 8)
1811 case OFPUTIL_P_OF10:
1812 case OFPUTIL_P_OF10_TID:
1813 msg = ofpbuf_new(sizeof *ofm + fm->ofpacts_len);
1814 ofm = put_openflow(sizeof *ofm, OFPT_FLOW_MOD, msg);
1815 ofputil_cls_rule_to_ofp10_match(&fm->cr, &ofm->match);
1816 ofm->cookie = fm->new_cookie;
1817 ofm->command = htons(command);
1818 ofm->idle_timeout = htons(fm->idle_timeout);
1819 ofm->hard_timeout = htons(fm->hard_timeout);
1820 ofm->priority = htons(fm->cr.priority);
1821 ofm->buffer_id = htonl(fm->buffer_id);
1822 ofm->out_port = htons(fm->out_port);
1823 ofm->flags = htons(fm->flags);
1827 case OFPUTIL_P_NXM_TID:
1828 msg = ofpbuf_new(sizeof *nfm + NXM_TYPICAL_LEN + fm->ofpacts_len);
1829 put_nxmsg(sizeof *nfm, NXT_FLOW_MOD, msg);
1831 nfm->command = htons(command);
1832 nfm->cookie = fm->new_cookie;
1833 match_len = nx_put_match(msg, false, &fm->cr,
1834 fm->cookie, fm->cookie_mask);
1836 nfm->idle_timeout = htons(fm->idle_timeout);
1837 nfm->hard_timeout = htons(fm->hard_timeout);
1838 nfm->priority = htons(fm->cr.priority);
1839 nfm->buffer_id = htonl(fm->buffer_id);
1840 nfm->out_port = htons(fm->out_port);
1841 nfm->flags = htons(fm->flags);
1842 nfm->match_len = htons(match_len);
1845 case OFPUTIL_P_OF12:
1851 ofpacts_put_openflow10(fm->ofpacts, fm->ofpacts_len, msg);
1853 update_openflow_length(msg);
1857 /* Returns a bitmask with a 1-bit for each protocol that could be used to
1858 * send all of the 'n_fm's flow table modification requests in 'fms', and a
1859 * 0-bit for each protocol that is inadequate.
1861 * (The return value will have at least one 1-bit.) */
1862 enum ofputil_protocol
1863 ofputil_flow_mod_usable_protocols(const struct ofputil_flow_mod *fms,
1866 enum ofputil_protocol usable_protocols;
1869 usable_protocols = OFPUTIL_P_ANY;
1870 for (i = 0; i < n_fms; i++) {
1871 const struct ofputil_flow_mod *fm = &fms[i];
1873 usable_protocols &= ofputil_usable_protocols(&fm->cr);
1874 if (fm->table_id != 0xff) {
1875 usable_protocols &= OFPUTIL_P_TID;
1878 /* Matching of the cookie is only supported through NXM. */
1879 if (fm->cookie_mask != htonll(0)) {
1880 usable_protocols &= OFPUTIL_P_NXM_ANY;
1883 assert(usable_protocols);
1885 return usable_protocols;
1889 ofputil_decode_ofpst_flow_request(struct ofputil_flow_stats_request *fsr,
1890 const struct ofp_header *oh,
1893 const struct ofp_flow_stats_request *ofsr =
1894 (const struct ofp_flow_stats_request *) oh;
1896 fsr->aggregate = aggregate;
1897 ofputil_cls_rule_from_ofp10_match(&ofsr->match, 0, &fsr->match);
1898 fsr->out_port = ntohs(ofsr->out_port);
1899 fsr->table_id = ofsr->table_id;
1900 fsr->cookie = fsr->cookie_mask = htonll(0);
1906 ofputil_decode_nxst_flow_request(struct ofputil_flow_stats_request *fsr,
1907 const struct ofp_header *oh,
1910 const struct nx_flow_stats_request *nfsr;
1914 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1916 nfsr = ofpbuf_pull(&b, sizeof *nfsr);
1917 error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &fsr->match,
1918 &fsr->cookie, &fsr->cookie_mask);
1923 return OFPERR_OFPBRC_BAD_LEN;
1926 fsr->aggregate = aggregate;
1927 fsr->out_port = ntohs(nfsr->out_port);
1928 fsr->table_id = nfsr->table_id;
1933 /* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE
1934 * request 'oh', into an abstract flow_stats_request in 'fsr'. Returns 0 if
1935 * successful, otherwise an OpenFlow error code. */
1937 ofputil_decode_flow_stats_request(struct ofputil_flow_stats_request *fsr,
1938 const struct ofp_header *oh)
1940 const struct ofputil_msg_type *type;
1944 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1946 ofputil_decode_msg_type(oh, &type);
1947 code = ofputil_msg_type_code(type);
1949 case OFPUTIL_OFPST_FLOW_REQUEST:
1950 return ofputil_decode_ofpst_flow_request(fsr, oh, false);
1952 case OFPUTIL_OFPST_AGGREGATE_REQUEST:
1953 return ofputil_decode_ofpst_flow_request(fsr, oh, true);
1955 case OFPUTIL_NXST_FLOW_REQUEST:
1956 return ofputil_decode_nxst_flow_request(fsr, oh, false);
1958 case OFPUTIL_NXST_AGGREGATE_REQUEST:
1959 return ofputil_decode_nxst_flow_request(fsr, oh, true);
1962 /* Hey, the caller lied. */
1967 /* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW,
1968 * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to
1969 * 'protocol', and returns the message. */
1971 ofputil_encode_flow_stats_request(const struct ofputil_flow_stats_request *fsr,
1972 enum ofputil_protocol protocol)
1977 case OFPUTIL_P_OF10:
1978 case OFPUTIL_P_OF10_TID: {
1979 struct ofp_flow_stats_request *ofsr;
1982 type = fsr->aggregate ? OFPST_AGGREGATE : OFPST_FLOW;
1983 ofsr = ofputil_make_stats_request(sizeof *ofsr, type, 0, &msg);
1984 ofputil_cls_rule_to_ofp10_match(&fsr->match, &ofsr->match);
1985 ofsr->table_id = fsr->table_id;
1986 ofsr->out_port = htons(fsr->out_port);
1991 case OFPUTIL_P_NXM_TID: {
1992 struct nx_flow_stats_request *nfsr;
1996 subtype = fsr->aggregate ? NXST_AGGREGATE : NXST_FLOW;
1997 ofputil_make_stats_request(sizeof *nfsr, OFPST_VENDOR, subtype, &msg);
1998 match_len = nx_put_match(msg, false, &fsr->match,
1999 fsr->cookie, fsr->cookie_mask);
2002 nfsr->out_port = htons(fsr->out_port);
2003 nfsr->match_len = htons(match_len);
2004 nfsr->table_id = fsr->table_id;
2008 case OFPUTIL_P_OF12:
2016 /* Returns a bitmask with a 1-bit for each protocol that could be used to
2017 * accurately encode 'fsr', and a 0-bit for each protocol that is inadequate.
2019 * (The return value will have at least one 1-bit.) */
2020 enum ofputil_protocol
2021 ofputil_flow_stats_request_usable_protocols(
2022 const struct ofputil_flow_stats_request *fsr)
2024 enum ofputil_protocol usable_protocols;
2026 usable_protocols = ofputil_usable_protocols(&fsr->match);
2027 if (fsr->cookie_mask != htonll(0)) {
2028 usable_protocols &= OFPUTIL_P_NXM_ANY;
2030 return usable_protocols;
2033 /* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract
2034 * ofputil_flow_stats in 'fs'.
2036 * Multiple OFPST_FLOW or NXST_FLOW replies can be packed into a single
2037 * OpenFlow message. Calling this function multiple times for a single 'msg'
2038 * iterates through the replies. The caller must initially leave 'msg''s layer
2039 * pointers null and not modify them between calls.
2041 * Most switches don't send the values needed to populate fs->idle_age and
2042 * fs->hard_age, so those members will usually be set to 0. If the switch from
2043 * which 'msg' originated is known to implement NXT_FLOW_AGE, then pass
2044 * 'flow_age_extension' as true so that the contents of 'msg' determine the
2045 * 'idle_age' and 'hard_age' members in 'fs'.
2047 * Uses 'ofpacts' to store the abstract OFPACT_* version of the flow stats
2048 * reply's actions. The caller must initialize 'ofpacts' and retains ownership
2049 * of it. 'fs->ofpacts' will point into the 'ofpacts' buffer.
2051 * Returns 0 if successful, EOF if no replies were left in this 'msg',
2052 * otherwise a positive errno value. */
2054 ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs,
2056 bool flow_age_extension,
2057 struct ofpbuf *ofpacts)
2059 const struct ofputil_msg_type *type;
2062 ofputil_decode_msg_type(msg->l2 ? msg->l2 : msg->data, &type);
2063 code = ofputil_msg_type_code(type);
2065 msg->l2 = msg->data;
2066 if (code == OFPUTIL_OFPST_FLOW_REPLY) {
2067 ofpbuf_pull(msg, sizeof(struct ofp_stats_msg));
2068 } else if (code == OFPUTIL_NXST_FLOW_REPLY) {
2069 ofpbuf_pull(msg, sizeof(struct nicira_stats_msg));
2077 } else if (code == OFPUTIL_OFPST_FLOW_REPLY) {
2078 const struct ofp_flow_stats *ofs;
2081 ofs = ofpbuf_try_pull(msg, sizeof *ofs);
2083 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover "
2084 "bytes at end", msg->size);
2088 length = ntohs(ofs->length);
2089 if (length < sizeof *ofs) {
2090 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid "
2091 "length %zu", length);
2095 if (ofpacts_pull_openflow10(msg, length - sizeof *ofs, ofpacts)) {
2099 fs->cookie = get_32aligned_be64(&ofs->cookie);
2100 ofputil_cls_rule_from_ofp10_match(&ofs->match, ntohs(ofs->priority),
2102 fs->table_id = ofs->table_id;
2103 fs->duration_sec = ntohl(ofs->duration_sec);
2104 fs->duration_nsec = ntohl(ofs->duration_nsec);
2105 fs->idle_timeout = ntohs(ofs->idle_timeout);
2106 fs->hard_timeout = ntohs(ofs->hard_timeout);
2109 fs->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count));
2110 fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count));
2111 } else if (code == OFPUTIL_NXST_FLOW_REPLY) {
2112 const struct nx_flow_stats *nfs;
2113 size_t match_len, actions_len, length;
2115 nfs = ofpbuf_try_pull(msg, sizeof *nfs);
2117 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply has %zu leftover "
2118 "bytes at end", msg->size);
2122 length = ntohs(nfs->length);
2123 match_len = ntohs(nfs->match_len);
2124 if (length < sizeof *nfs + ROUND_UP(match_len, 8)) {
2125 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply with match_len=%zu "
2126 "claims invalid length %zu", match_len, length);
2129 if (nx_pull_match(msg, match_len, ntohs(nfs->priority), &fs->rule,
2134 actions_len = length - sizeof *nfs - ROUND_UP(match_len, 8);
2135 if (ofpacts_pull_openflow10(msg, actions_len, ofpacts)) {
2139 fs->cookie = nfs->cookie;
2140 fs->table_id = nfs->table_id;
2141 fs->duration_sec = ntohl(nfs->duration_sec);
2142 fs->duration_nsec = ntohl(nfs->duration_nsec);
2143 fs->idle_timeout = ntohs(nfs->idle_timeout);
2144 fs->hard_timeout = ntohs(nfs->hard_timeout);
2147 if (flow_age_extension) {
2148 if (nfs->idle_age) {
2149 fs->idle_age = ntohs(nfs->idle_age) - 1;
2151 if (nfs->hard_age) {
2152 fs->hard_age = ntohs(nfs->hard_age) - 1;
2155 fs->packet_count = ntohll(nfs->packet_count);
2156 fs->byte_count = ntohll(nfs->byte_count);
2161 fs->ofpacts = ofpacts->data;
2162 fs->ofpacts_len = ofpacts->size;
2167 /* Returns 'count' unchanged except that UINT64_MAX becomes 0.
2169 * We use this in situations where OVS internally uses UINT64_MAX to mean
2170 * "value unknown" but OpenFlow 1.0 does not define any unknown value. */
2172 unknown_to_zero(uint64_t count)
2174 return count != UINT64_MAX ? count : 0;
2177 /* Appends an OFPST_FLOW or NXST_FLOW reply that contains the data in 'fs' to
2178 * those already present in the list of ofpbufs in 'replies'. 'replies' should
2179 * have been initialized with ofputil_start_stats_reply(). */
2181 ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *fs,
2182 struct list *replies)
2184 struct ofpbuf *reply = ofpbuf_from_list(list_back(replies));
2185 const struct ofp_stats_msg *osm = reply->data;
2186 size_t start_ofs = reply->size;
2188 if (osm->type == htons(OFPST_FLOW)) {
2189 struct ofp_flow_stats *ofs;
2191 ofpbuf_put_uninit(reply, sizeof *ofs);
2192 ofpacts_put_openflow10(fs->ofpacts, fs->ofpacts_len, reply);
2194 ofs = ofpbuf_at_assert(reply, start_ofs, sizeof *ofs);
2195 ofs->length = htons(reply->size - start_ofs);
2196 ofs->table_id = fs->table_id;
2198 ofputil_cls_rule_to_ofp10_match(&fs->rule, &ofs->match);
2199 ofs->duration_sec = htonl(fs->duration_sec);
2200 ofs->duration_nsec = htonl(fs->duration_nsec);
2201 ofs->priority = htons(fs->rule.priority);
2202 ofs->idle_timeout = htons(fs->idle_timeout);
2203 ofs->hard_timeout = htons(fs->hard_timeout);
2204 memset(ofs->pad2, 0, sizeof ofs->pad2);
2205 put_32aligned_be64(&ofs->cookie, fs->cookie);
2206 put_32aligned_be64(&ofs->packet_count,
2207 htonll(unknown_to_zero(fs->packet_count)));
2208 put_32aligned_be64(&ofs->byte_count,
2209 htonll(unknown_to_zero(fs->byte_count)));
2210 } else if (osm->type == htons(OFPST_VENDOR)) {
2211 struct nx_flow_stats *nfs;
2214 ofpbuf_put_uninit(reply, sizeof *nfs);
2215 match_len = nx_put_match(reply, false, &fs->rule, 0, 0);
2216 ofpacts_put_openflow10(fs->ofpacts, fs->ofpacts_len, reply);
2218 nfs = ofpbuf_at_assert(reply, start_ofs, sizeof *nfs);
2219 nfs->length = htons(reply->size - start_ofs);
2220 nfs->table_id = fs->table_id;
2222 nfs->duration_sec = htonl(fs->duration_sec);
2223 nfs->duration_nsec = htonl(fs->duration_nsec);
2224 nfs->priority = htons(fs->rule.priority);
2225 nfs->idle_timeout = htons(fs->idle_timeout);
2226 nfs->hard_timeout = htons(fs->hard_timeout);
2227 nfs->idle_age = htons(fs->idle_age < 0 ? 0
2228 : fs->idle_age < UINT16_MAX ? fs->idle_age + 1
2230 nfs->hard_age = htons(fs->hard_age < 0 ? 0
2231 : fs->hard_age < UINT16_MAX ? fs->hard_age + 1
2233 nfs->match_len = htons(match_len);
2234 nfs->cookie = fs->cookie;
2235 nfs->packet_count = htonll(fs->packet_count);
2236 nfs->byte_count = htonll(fs->byte_count);
2241 ofputil_postappend_stats_reply(start_ofs, replies);
2244 /* Converts abstract ofputil_aggregate_stats 'stats' into an OFPST_AGGREGATE or
2245 * NXST_AGGREGATE reply according to 'protocol', and returns the message. */
2247 ofputil_encode_aggregate_stats_reply(
2248 const struct ofputil_aggregate_stats *stats,
2249 const struct ofp_stats_msg *request)
2253 if (request->type == htons(OFPST_AGGREGATE)) {
2254 struct ofp_aggregate_stats_reply *asr;
2256 asr = ofputil_make_stats_reply(sizeof *asr, request, &msg);
2257 put_32aligned_be64(&asr->packet_count,
2258 htonll(unknown_to_zero(stats->packet_count)));
2259 put_32aligned_be64(&asr->byte_count,
2260 htonll(unknown_to_zero(stats->byte_count)));
2261 asr->flow_count = htonl(stats->flow_count);
2262 } else if (request->type == htons(OFPST_VENDOR)) {
2263 struct nx_aggregate_stats_reply *nasr;
2265 nasr = ofputil_make_stats_reply(sizeof *nasr, request, &msg);
2266 assert(nasr->nsm.subtype == htonl(NXST_AGGREGATE));
2267 nasr->packet_count = htonll(stats->packet_count);
2268 nasr->byte_count = htonll(stats->byte_count);
2269 nasr->flow_count = htonl(stats->flow_count);
2277 /* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh' into an
2278 * abstract ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise
2279 * an OpenFlow error code. */
2281 ofputil_decode_flow_removed(struct ofputil_flow_removed *fr,
2282 const struct ofp_header *oh)
2284 const struct ofputil_msg_type *type;
2285 enum ofputil_msg_code code;
2287 ofputil_decode_msg_type(oh, &type);
2288 code = ofputil_msg_type_code(type);
2289 if (code == OFPUTIL_OFPT_FLOW_REMOVED) {
2290 const struct ofp_flow_removed *ofr;
2292 ofr = (const struct ofp_flow_removed *) oh;
2293 ofputil_cls_rule_from_ofp10_match(&ofr->match, ntohs(ofr->priority),
2295 fr->cookie = ofr->cookie;
2296 fr->reason = ofr->reason;
2297 fr->duration_sec = ntohl(ofr->duration_sec);
2298 fr->duration_nsec = ntohl(ofr->duration_nsec);
2299 fr->idle_timeout = ntohs(ofr->idle_timeout);
2300 fr->packet_count = ntohll(ofr->packet_count);
2301 fr->byte_count = ntohll(ofr->byte_count);
2302 } else if (code == OFPUTIL_NXT_FLOW_REMOVED) {
2303 struct nx_flow_removed *nfr;
2307 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2309 nfr = ofpbuf_pull(&b, sizeof *nfr);
2310 error = nx_pull_match(&b, ntohs(nfr->match_len), ntohs(nfr->priority),
2311 &fr->rule, NULL, NULL);
2316 return OFPERR_OFPBRC_BAD_LEN;
2319 fr->cookie = nfr->cookie;
2320 fr->reason = nfr->reason;
2321 fr->duration_sec = ntohl(nfr->duration_sec);
2322 fr->duration_nsec = ntohl(nfr->duration_nsec);
2323 fr->idle_timeout = ntohs(nfr->idle_timeout);
2324 fr->packet_count = ntohll(nfr->packet_count);
2325 fr->byte_count = ntohll(nfr->byte_count);
2333 /* Converts abstract ofputil_flow_removed 'fr' into an OFPT_FLOW_REMOVED or
2334 * NXT_FLOW_REMOVED message 'oh' according to 'protocol', and returns the
2337 ofputil_encode_flow_removed(const struct ofputil_flow_removed *fr,
2338 enum ofputil_protocol protocol)
2343 case OFPUTIL_P_OF10:
2344 case OFPUTIL_P_OF10_TID: {
2345 struct ofp_flow_removed *ofr;
2347 ofr = make_openflow_xid(sizeof *ofr, OFPT_FLOW_REMOVED, htonl(0),
2349 ofputil_cls_rule_to_ofp10_match(&fr->rule, &ofr->match);
2350 ofr->cookie = fr->cookie;
2351 ofr->priority = htons(fr->rule.priority);
2352 ofr->reason = fr->reason;
2353 ofr->duration_sec = htonl(fr->duration_sec);
2354 ofr->duration_nsec = htonl(fr->duration_nsec);
2355 ofr->idle_timeout = htons(fr->idle_timeout);
2356 ofr->packet_count = htonll(unknown_to_zero(fr->packet_count));
2357 ofr->byte_count = htonll(unknown_to_zero(fr->byte_count));
2362 case OFPUTIL_P_NXM_TID: {
2363 struct nx_flow_removed *nfr;
2366 make_nxmsg_xid(sizeof *nfr, NXT_FLOW_REMOVED, htonl(0), &msg);
2367 match_len = nx_put_match(msg, false, &fr->rule, 0, 0);
2370 nfr->cookie = fr->cookie;
2371 nfr->priority = htons(fr->rule.priority);
2372 nfr->reason = fr->reason;
2373 nfr->duration_sec = htonl(fr->duration_sec);
2374 nfr->duration_nsec = htonl(fr->duration_nsec);
2375 nfr->idle_timeout = htons(fr->idle_timeout);
2376 nfr->match_len = htons(match_len);
2377 nfr->packet_count = htonll(fr->packet_count);
2378 nfr->byte_count = htonll(fr->byte_count);
2382 case OFPUTIL_P_OF12:
2391 ofputil_decode_packet_in(struct ofputil_packet_in *pin,
2392 const struct ofp_header *oh)
2394 const struct ofputil_msg_type *type;
2395 enum ofputil_msg_code code;
2397 ofputil_decode_msg_type(oh, &type);
2398 code = ofputil_msg_type_code(type);
2399 memset(pin, 0, sizeof *pin);
2401 if (code == OFPUTIL_OFPT_PACKET_IN) {
2402 const struct ofp_packet_in *opi = (const struct ofp_packet_in *) oh;
2404 pin->packet = opi->data;
2405 pin->packet_len = ntohs(opi->header.length)
2406 - offsetof(struct ofp_packet_in, data);
2408 pin->fmd.in_port = ntohs(opi->in_port);
2409 pin->reason = opi->reason;
2410 pin->buffer_id = ntohl(opi->buffer_id);
2411 pin->total_len = ntohs(opi->total_len);
2412 } else if (code == OFPUTIL_NXT_PACKET_IN) {
2413 const struct nx_packet_in *npi;
2414 struct cls_rule rule;
2418 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2420 npi = ofpbuf_pull(&b, sizeof *npi);
2421 error = nx_pull_match_loose(&b, ntohs(npi->match_len), 0, &rule, NULL,
2427 if (!ofpbuf_try_pull(&b, 2)) {
2428 return OFPERR_OFPBRC_BAD_LEN;
2431 pin->packet = b.data;
2432 pin->packet_len = b.size;
2433 pin->reason = npi->reason;
2434 pin->table_id = npi->table_id;
2435 pin->cookie = npi->cookie;
2437 pin->fmd.in_port = rule.flow.in_port;
2439 pin->fmd.tun_id = rule.flow.tun_id;
2440 pin->fmd.tun_id_mask = rule.wc.tun_id_mask;
2442 pin->fmd.metadata = rule.flow.metadata;
2443 pin->fmd.metadata_mask = rule.wc.metadata_mask;
2445 memcpy(pin->fmd.regs, rule.flow.regs, sizeof pin->fmd.regs);
2446 memcpy(pin->fmd.reg_masks, rule.wc.reg_masks,
2447 sizeof pin->fmd.reg_masks);
2449 pin->buffer_id = ntohl(npi->buffer_id);
2450 pin->total_len = ntohs(npi->total_len);
2458 /* Converts abstract ofputil_packet_in 'pin' into a PACKET_IN message
2459 * in the format specified by 'packet_in_format'. */
2461 ofputil_encode_packet_in(const struct ofputil_packet_in *pin,
2462 enum nx_packet_in_format packet_in_format)
2464 size_t send_len = MIN(pin->send_len, pin->packet_len);
2465 struct ofpbuf *packet;
2467 /* Add OFPT_PACKET_IN. */
2468 if (packet_in_format == NXPIF_OPENFLOW10) {
2469 size_t header_len = offsetof(struct ofp_packet_in, data);
2470 struct ofp_packet_in *opi;
2472 packet = ofpbuf_new(send_len + header_len);
2473 opi = ofpbuf_put_zeros(packet, header_len);
2474 opi->header.version = OFP10_VERSION;
2475 opi->header.type = OFPT_PACKET_IN;
2476 opi->total_len = htons(pin->total_len);
2477 opi->in_port = htons(pin->fmd.in_port);
2478 opi->reason = pin->reason;
2479 opi->buffer_id = htonl(pin->buffer_id);
2481 ofpbuf_put(packet, pin->packet, send_len);
2482 } else if (packet_in_format == NXPIF_NXM) {
2483 struct nx_packet_in *npi;
2484 struct cls_rule rule;
2488 /* Estimate of required PACKET_IN length includes the NPI header, space
2489 * for the match (2 times sizeof the metadata seems like enough), 2
2490 * bytes for padding, and the packet length. */
2491 packet = ofpbuf_new(sizeof *npi + sizeof(struct flow_metadata) * 2
2494 cls_rule_init_catchall(&rule, 0);
2495 cls_rule_set_tun_id_masked(&rule, pin->fmd.tun_id,
2496 pin->fmd.tun_id_mask);
2497 cls_rule_set_metadata_masked(&rule, pin->fmd.metadata,
2498 pin->fmd.metadata_mask);
2501 for (i = 0; i < FLOW_N_REGS; i++) {
2502 cls_rule_set_reg_masked(&rule, i, pin->fmd.regs[i],
2503 pin->fmd.reg_masks[i]);
2506 cls_rule_set_in_port(&rule, pin->fmd.in_port);
2508 ofpbuf_put_zeros(packet, sizeof *npi);
2509 match_len = nx_put_match(packet, false, &rule, 0, 0);
2510 ofpbuf_put_zeros(packet, 2);
2511 ofpbuf_put(packet, pin->packet, send_len);
2514 npi->nxh.header.version = OFP10_VERSION;
2515 npi->nxh.header.type = OFPT_VENDOR;
2516 npi->nxh.vendor = htonl(NX_VENDOR_ID);
2517 npi->nxh.subtype = htonl(NXT_PACKET_IN);
2519 npi->buffer_id = htonl(pin->buffer_id);
2520 npi->total_len = htons(pin->total_len);
2521 npi->reason = pin->reason;
2522 npi->table_id = pin->table_id;
2523 npi->cookie = pin->cookie;
2524 npi->match_len = htons(match_len);
2528 update_openflow_length(packet);
2534 ofputil_packet_in_reason_to_string(enum ofp_packet_in_reason reason)
2536 static char s[INT_STRLEN(int) + 1];
2543 case OFPR_INVALID_TTL:
2544 return "invalid_ttl";
2546 case OFPR_N_REASONS:
2548 sprintf(s, "%d", (int) reason);
2554 ofputil_packet_in_reason_from_string(const char *s,
2555 enum ofp_packet_in_reason *reason)
2559 for (i = 0; i < OFPR_N_REASONS; i++) {
2560 if (!strcasecmp(s, ofputil_packet_in_reason_to_string(i))) {
2568 /* Converts an OFPT_PACKET_OUT in 'opo' into an abstract ofputil_packet_out in
2571 * Uses 'ofpacts' to store the abstract OFPACT_* version of the packet out
2572 * message's actions. The caller must initialize 'ofpacts' and retains
2573 * ownership of it. 'po->ofpacts' will point into the 'ofpacts' buffer.
2575 * Returns 0 if successful, otherwise an OFPERR_* value. */
2577 ofputil_decode_packet_out(struct ofputil_packet_out *po,
2578 const struct ofp_packet_out *opo,
2579 struct ofpbuf *ofpacts)
2584 po->buffer_id = ntohl(opo->buffer_id);
2585 po->in_port = ntohs(opo->in_port);
2586 if (po->in_port >= OFPP_MAX && po->in_port != OFPP_LOCAL
2587 && po->in_port != OFPP_NONE && po->in_port != OFPP_CONTROLLER) {
2588 VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out has bad input port %#"PRIx16,
2590 return OFPERR_NXBRC_BAD_IN_PORT;
2593 ofpbuf_use_const(&b, opo, ntohs(opo->header.length));
2594 ofpbuf_pull(&b, sizeof *opo);
2596 error = ofpacts_pull_openflow10(&b, ntohs(opo->actions_len), ofpacts);
2600 po->ofpacts = ofpacts->data;
2601 po->ofpacts_len = ofpacts->size;
2603 if (po->buffer_id == UINT32_MAX) {
2604 po->packet = b.data;
2605 po->packet_len = b.size;
2614 /* ofputil_phy_port */
2616 /* NETDEV_F_* to and from OFPPF_* and OFPPF10_*. */
2617 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
2618 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
2619 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
2620 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
2621 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
2622 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
2623 BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
2625 /* NETDEV_F_ bits 11...15 are OFPPF10_ bits 7...11: */
2626 BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == (OFPPF10_COPPER << 4));
2627 BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == (OFPPF10_FIBER << 4));
2628 BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == (OFPPF10_AUTONEG << 4));
2629 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == (OFPPF10_PAUSE << 4));
2630 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == (OFPPF10_PAUSE_ASYM << 4));
2632 static enum netdev_features
2633 netdev_port_features_from_ofp10(ovs_be32 ofp10_)
2635 uint32_t ofp10 = ntohl(ofp10_);
2636 return (ofp10 & 0x7f) | ((ofp10 & 0xf80) << 4);
2640 netdev_port_features_to_ofp10(enum netdev_features features)
2642 return htonl((features & 0x7f) | ((features & 0xf800) >> 4));
2645 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
2646 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
2647 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
2648 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
2649 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
2650 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
2651 BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
2652 BUILD_ASSERT_DECL((int) NETDEV_F_40GB_FD == OFPPF11_40GB_FD); /* bit 7 */
2653 BUILD_ASSERT_DECL((int) NETDEV_F_100GB_FD == OFPPF11_100GB_FD); /* bit 8 */
2654 BUILD_ASSERT_DECL((int) NETDEV_F_1TB_FD == OFPPF11_1TB_FD); /* bit 9 */
2655 BUILD_ASSERT_DECL((int) NETDEV_F_OTHER == OFPPF11_OTHER); /* bit 10 */
2656 BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == OFPPF11_COPPER); /* bit 11 */
2657 BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == OFPPF11_FIBER); /* bit 12 */
2658 BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == OFPPF11_AUTONEG); /* bit 13 */
2659 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == OFPPF11_PAUSE); /* bit 14 */
2660 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == OFPPF11_PAUSE_ASYM);/* bit 15 */
2662 static enum netdev_features
2663 netdev_port_features_from_ofp11(ovs_be32 ofp11)
2665 return ntohl(ofp11) & 0xffff;
2669 netdev_port_features_to_ofp11(enum netdev_features features)
2671 return htonl(features & 0xffff);
2675 ofputil_decode_ofp10_phy_port(struct ofputil_phy_port *pp,
2676 const struct ofp10_phy_port *opp)
2678 memset(pp, 0, sizeof *pp);
2680 pp->port_no = ntohs(opp->port_no);
2681 memcpy(pp->hw_addr, opp->hw_addr, OFP_ETH_ALEN);
2682 ovs_strlcpy(pp->name, opp->name, OFP_MAX_PORT_NAME_LEN);
2684 pp->config = ntohl(opp->config) & OFPPC10_ALL;
2685 pp->state = ntohl(opp->state) & OFPPS10_ALL;
2687 pp->curr = netdev_port_features_from_ofp10(opp->curr);
2688 pp->advertised = netdev_port_features_from_ofp10(opp->advertised);
2689 pp->supported = netdev_port_features_from_ofp10(opp->supported);
2690 pp->peer = netdev_port_features_from_ofp10(opp->peer);
2692 pp->curr_speed = netdev_features_to_bps(pp->curr) / 1000;
2693 pp->max_speed = netdev_features_to_bps(pp->supported) / 1000;
2699 ofputil_decode_ofp11_port(struct ofputil_phy_port *pp,
2700 const struct ofp11_port *op)
2704 memset(pp, 0, sizeof *pp);
2706 error = ofputil_port_from_ofp11(op->port_no, &pp->port_no);
2710 memcpy(pp->hw_addr, op->hw_addr, OFP_ETH_ALEN);
2711 ovs_strlcpy(pp->name, op->name, OFP_MAX_PORT_NAME_LEN);
2713 pp->config = ntohl(op->config) & OFPPC11_ALL;
2714 pp->state = ntohl(op->state) & OFPPC11_ALL;
2716 pp->curr = netdev_port_features_from_ofp11(op->curr);
2717 pp->advertised = netdev_port_features_from_ofp11(op->advertised);
2718 pp->supported = netdev_port_features_from_ofp11(op->supported);
2719 pp->peer = netdev_port_features_from_ofp11(op->peer);
2721 pp->curr_speed = ntohl(op->curr_speed);
2722 pp->max_speed = ntohl(op->max_speed);
2728 ofputil_get_phy_port_size(uint8_t ofp_version)
2730 return ofp_version == OFP10_VERSION ? sizeof(struct ofp10_phy_port)
2731 : sizeof(struct ofp11_port);
2735 ofputil_encode_ofp10_phy_port(const struct ofputil_phy_port *pp,
2736 struct ofp10_phy_port *opp)
2738 memset(opp, 0, sizeof *opp);
2740 opp->port_no = htons(pp->port_no);
2741 memcpy(opp->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
2742 ovs_strlcpy(opp->name, pp->name, OFP_MAX_PORT_NAME_LEN);
2744 opp->config = htonl(pp->config & OFPPC10_ALL);
2745 opp->state = htonl(pp->state & OFPPS10_ALL);
2747 opp->curr = netdev_port_features_to_ofp10(pp->curr);
2748 opp->advertised = netdev_port_features_to_ofp10(pp->advertised);
2749 opp->supported = netdev_port_features_to_ofp10(pp->supported);
2750 opp->peer = netdev_port_features_to_ofp10(pp->peer);
2754 ofputil_encode_ofp11_port(const struct ofputil_phy_port *pp,
2755 struct ofp11_port *op)
2757 memset(op, 0, sizeof *op);
2759 op->port_no = ofputil_port_to_ofp11(pp->port_no);
2760 memcpy(op->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
2761 ovs_strlcpy(op->name, pp->name, OFP_MAX_PORT_NAME_LEN);
2763 op->config = htonl(pp->config & OFPPC11_ALL);
2764 op->state = htonl(pp->state & OFPPS11_ALL);
2766 op->curr = netdev_port_features_to_ofp11(pp->curr);
2767 op->advertised = netdev_port_features_to_ofp11(pp->advertised);
2768 op->supported = netdev_port_features_to_ofp11(pp->supported);
2769 op->peer = netdev_port_features_to_ofp11(pp->peer);
2771 op->curr_speed = htonl(pp->curr_speed);
2772 op->max_speed = htonl(pp->max_speed);
2776 ofputil_put_phy_port(uint8_t ofp_version, const struct ofputil_phy_port *pp,
2779 if (ofp_version == OFP10_VERSION) {
2780 struct ofp10_phy_port *opp;
2781 if (b->size + sizeof *opp <= UINT16_MAX) {
2782 opp = ofpbuf_put_uninit(b, sizeof *opp);
2783 ofputil_encode_ofp10_phy_port(pp, opp);
2786 struct ofp11_port *op;
2787 if (b->size + sizeof *op <= UINT16_MAX) {
2788 op = ofpbuf_put_uninit(b, sizeof *op);
2789 ofputil_encode_ofp11_port(pp, op);
2795 ofputil_append_port_desc_stats_reply(uint8_t ofp_version,
2796 const struct ofputil_phy_port *pp,
2797 struct list *replies)
2799 if (ofp_version == OFP10_VERSION) {
2800 struct ofp10_phy_port *opp;
2802 opp = ofputil_append_stats_reply(sizeof *opp, replies);
2803 ofputil_encode_ofp10_phy_port(pp, opp);
2805 struct ofp11_port *op;
2807 op = ofputil_append_stats_reply(sizeof *op, replies);
2808 ofputil_encode_ofp11_port(pp, op);
2812 /* ofputil_switch_features */
2814 #define OFPC_COMMON (OFPC_FLOW_STATS | OFPC_TABLE_STATS | OFPC_PORT_STATS | \
2815 OFPC_IP_REASM | OFPC_QUEUE_STATS | OFPC_ARP_MATCH_IP)
2816 BUILD_ASSERT_DECL((int) OFPUTIL_C_FLOW_STATS == OFPC_FLOW_STATS);
2817 BUILD_ASSERT_DECL((int) OFPUTIL_C_TABLE_STATS == OFPC_TABLE_STATS);
2818 BUILD_ASSERT_DECL((int) OFPUTIL_C_PORT_STATS == OFPC_PORT_STATS);
2819 BUILD_ASSERT_DECL((int) OFPUTIL_C_IP_REASM == OFPC_IP_REASM);
2820 BUILD_ASSERT_DECL((int) OFPUTIL_C_QUEUE_STATS == OFPC_QUEUE_STATS);
2821 BUILD_ASSERT_DECL((int) OFPUTIL_C_ARP_MATCH_IP == OFPC_ARP_MATCH_IP);
2823 struct ofputil_action_bit_translation {
2824 enum ofputil_action_bitmap ofputil_bit;
2828 static const struct ofputil_action_bit_translation of10_action_bits[] = {
2829 { OFPUTIL_A_OUTPUT, OFPAT10_OUTPUT },
2830 { OFPUTIL_A_SET_VLAN_VID, OFPAT10_SET_VLAN_VID },
2831 { OFPUTIL_A_SET_VLAN_PCP, OFPAT10_SET_VLAN_PCP },
2832 { OFPUTIL_A_STRIP_VLAN, OFPAT10_STRIP_VLAN },
2833 { OFPUTIL_A_SET_DL_SRC, OFPAT10_SET_DL_SRC },
2834 { OFPUTIL_A_SET_DL_DST, OFPAT10_SET_DL_DST },
2835 { OFPUTIL_A_SET_NW_SRC, OFPAT10_SET_NW_SRC },
2836 { OFPUTIL_A_SET_NW_DST, OFPAT10_SET_NW_DST },
2837 { OFPUTIL_A_SET_NW_TOS, OFPAT10_SET_NW_TOS },
2838 { OFPUTIL_A_SET_TP_SRC, OFPAT10_SET_TP_SRC },
2839 { OFPUTIL_A_SET_TP_DST, OFPAT10_SET_TP_DST },
2840 { OFPUTIL_A_ENQUEUE, OFPAT10_ENQUEUE },
2844 static const struct ofputil_action_bit_translation of11_action_bits[] = {
2845 { OFPUTIL_A_OUTPUT, OFPAT11_OUTPUT },
2846 { OFPUTIL_A_SET_VLAN_VID, OFPAT11_SET_VLAN_VID },
2847 { OFPUTIL_A_SET_VLAN_PCP, OFPAT11_SET_VLAN_PCP },
2848 { OFPUTIL_A_SET_DL_SRC, OFPAT11_SET_DL_SRC },
2849 { OFPUTIL_A_SET_DL_DST, OFPAT11_SET_DL_DST },
2850 { OFPUTIL_A_SET_NW_SRC, OFPAT11_SET_NW_SRC },
2851 { OFPUTIL_A_SET_NW_DST, OFPAT11_SET_NW_DST },
2852 { OFPUTIL_A_SET_NW_TOS, OFPAT11_SET_NW_TOS },
2853 { OFPUTIL_A_SET_NW_ECN, OFPAT11_SET_NW_ECN },
2854 { OFPUTIL_A_SET_TP_SRC, OFPAT11_SET_TP_SRC },
2855 { OFPUTIL_A_SET_TP_DST, OFPAT11_SET_TP_DST },
2856 { OFPUTIL_A_COPY_TTL_OUT, OFPAT11_COPY_TTL_OUT },
2857 { OFPUTIL_A_COPY_TTL_IN, OFPAT11_COPY_TTL_IN },
2858 { OFPUTIL_A_SET_MPLS_LABEL, OFPAT11_SET_MPLS_LABEL },
2859 { OFPUTIL_A_SET_MPLS_TC, OFPAT11_SET_MPLS_TC },
2860 { OFPUTIL_A_SET_MPLS_TTL, OFPAT11_SET_MPLS_TTL },
2861 { OFPUTIL_A_DEC_MPLS_TTL, OFPAT11_DEC_MPLS_TTL },
2862 { OFPUTIL_A_PUSH_VLAN, OFPAT11_PUSH_VLAN },
2863 { OFPUTIL_A_POP_VLAN, OFPAT11_POP_VLAN },
2864 { OFPUTIL_A_PUSH_MPLS, OFPAT11_PUSH_MPLS },
2865 { OFPUTIL_A_POP_MPLS, OFPAT11_POP_MPLS },
2866 { OFPUTIL_A_SET_QUEUE, OFPAT11_SET_QUEUE },
2867 { OFPUTIL_A_GROUP, OFPAT11_GROUP },
2868 { OFPUTIL_A_SET_NW_TTL, OFPAT11_SET_NW_TTL },
2869 { OFPUTIL_A_DEC_NW_TTL, OFPAT11_DEC_NW_TTL },
2873 static enum ofputil_action_bitmap
2874 decode_action_bits(ovs_be32 of_actions,
2875 const struct ofputil_action_bit_translation *x)
2877 enum ofputil_action_bitmap ofputil_actions;
2879 ofputil_actions = 0;
2880 for (; x->ofputil_bit; x++) {
2881 if (of_actions & htonl(1u << x->of_bit)) {
2882 ofputil_actions |= x->ofputil_bit;
2885 return ofputil_actions;
2888 /* Decodes an OpenFlow 1.0 or 1.1 "switch_features" structure 'osf' into an
2889 * abstract representation in '*features'. Initializes '*b' to iterate over
2890 * the OpenFlow port structures following 'osf' with later calls to
2891 * ofputil_pull_phy_port(). Returns 0 if successful, otherwise an
2892 * OFPERR_* value. */
2894 ofputil_decode_switch_features(const struct ofp_switch_features *osf,
2895 struct ofputil_switch_features *features,
2898 ofpbuf_use_const(b, osf, ntohs(osf->header.length));
2899 ofpbuf_pull(b, sizeof *osf);
2901 features->datapath_id = ntohll(osf->datapath_id);
2902 features->n_buffers = ntohl(osf->n_buffers);
2903 features->n_tables = osf->n_tables;
2905 features->capabilities = ntohl(osf->capabilities) & OFPC_COMMON;
2907 if (b->size % ofputil_get_phy_port_size(osf->header.version)) {
2908 return OFPERR_OFPBRC_BAD_LEN;
2911 if (osf->header.version == OFP10_VERSION) {
2912 if (osf->capabilities & htonl(OFPC10_STP)) {
2913 features->capabilities |= OFPUTIL_C_STP;
2915 features->actions = decode_action_bits(osf->actions, of10_action_bits);
2916 } else if (osf->header.version == OFP11_VERSION) {
2917 if (osf->capabilities & htonl(OFPC11_GROUP_STATS)) {
2918 features->capabilities |= OFPUTIL_C_GROUP_STATS;
2920 features->actions = decode_action_bits(osf->actions, of11_action_bits);
2922 return OFPERR_OFPBRC_BAD_VERSION;
2928 /* Returns true if the maximum number of ports are in 'osf'. */
2930 max_ports_in_features(const struct ofp_switch_features *osf)
2932 size_t pp_size = ofputil_get_phy_port_size(osf->header.version);
2933 return ntohs(osf->header.length) + pp_size > UINT16_MAX;
2936 /* Given a buffer 'b' that contains a Features Reply message, checks if
2937 * it contains the maximum number of ports that will fit. If so, it
2938 * returns true and removes the ports from the message. The caller
2939 * should then send an OFPST_PORT_DESC stats request to get the ports,
2940 * since the switch may have more ports than could be represented in the
2941 * Features Reply. Otherwise, returns false.
2944 ofputil_switch_features_ports_trunc(struct ofpbuf *b)
2946 struct ofp_switch_features *osf = b->data;
2948 if (max_ports_in_features(osf)) {
2949 /* Remove all the ports. */
2950 b->size = sizeof(*osf);
2951 update_openflow_length(b);
2960 encode_action_bits(enum ofputil_action_bitmap ofputil_actions,
2961 const struct ofputil_action_bit_translation *x)
2963 uint32_t of_actions;
2966 for (; x->ofputil_bit; x++) {
2967 if (ofputil_actions & x->ofputil_bit) {
2968 of_actions |= 1 << x->of_bit;
2971 return htonl(of_actions);
2974 /* Returns a buffer owned by the caller that encodes 'features' in the format
2975 * required by 'protocol' with the given 'xid'. The caller should append port
2976 * information to the buffer with subsequent calls to
2977 * ofputil_put_switch_features_port(). */
2979 ofputil_encode_switch_features(const struct ofputil_switch_features *features,
2980 enum ofputil_protocol protocol, ovs_be32 xid)
2982 struct ofp_switch_features *osf;
2985 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, xid, &b);
2986 osf->header.version = ofputil_protocol_to_ofp_version(protocol);
2987 osf->datapath_id = htonll(features->datapath_id);
2988 osf->n_buffers = htonl(features->n_buffers);
2989 osf->n_tables = features->n_tables;
2991 osf->capabilities = htonl(features->capabilities & OFPC_COMMON);
2992 if (osf->header.version == OFP10_VERSION) {
2993 if (features->capabilities & OFPUTIL_C_STP) {
2994 osf->capabilities |= htonl(OFPC10_STP);
2996 osf->actions = encode_action_bits(features->actions, of10_action_bits);
2998 if (features->capabilities & OFPUTIL_C_GROUP_STATS) {
2999 osf->capabilities |= htonl(OFPC11_GROUP_STATS);
3001 osf->actions = encode_action_bits(features->actions, of11_action_bits);
3007 /* Encodes 'pp' into the format required by the switch_features message already
3008 * in 'b', which should have been returned by ofputil_encode_switch_features(),
3009 * and appends the encoded version to 'b'. */
3011 ofputil_put_switch_features_port(const struct ofputil_phy_port *pp,
3014 const struct ofp_switch_features *osf = b->data;
3016 ofputil_put_phy_port(osf->header.version, pp, b);
3019 /* ofputil_port_status */
3021 /* Decodes the OpenFlow "port status" message in '*ops' into an abstract form
3022 * in '*ps'. Returns 0 if successful, otherwise an OFPERR_* value. */
3024 ofputil_decode_port_status(const struct ofp_port_status *ops,
3025 struct ofputil_port_status *ps)
3030 if (ops->reason != OFPPR_ADD &&
3031 ops->reason != OFPPR_DELETE &&
3032 ops->reason != OFPPR_MODIFY) {
3033 return OFPERR_NXBRC_BAD_REASON;
3035 ps->reason = ops->reason;
3037 ofpbuf_use_const(&b, ops, ntohs(ops->header.length));
3038 ofpbuf_pull(&b, sizeof *ops);
3039 retval = ofputil_pull_phy_port(ops->header.version, &b, &ps->desc);
3040 assert(retval != EOF);
3044 /* Converts the abstract form of a "port status" message in '*ps' into an
3045 * OpenFlow message suitable for 'protocol', and returns that encoded form in
3046 * a buffer owned by the caller. */
3048 ofputil_encode_port_status(const struct ofputil_port_status *ps,
3049 enum ofputil_protocol protocol)
3051 struct ofp_port_status *ops;
3054 b = ofpbuf_new(sizeof *ops + sizeof(struct ofp11_port));
3055 ops = put_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, htonl(0), b);
3056 ops->header.version = ofputil_protocol_to_ofp_version(protocol);
3057 ops->reason = ps->reason;
3058 ofputil_put_phy_port(ops->header.version, &ps->desc, b);
3059 update_openflow_length(b);
3063 /* ofputil_port_mod */
3065 /* Decodes the OpenFlow "port mod" message in '*oh' into an abstract form in
3066 * '*pm'. Returns 0 if successful, otherwise an OFPERR_* value. */
3068 ofputil_decode_port_mod(const struct ofp_header *oh,
3069 struct ofputil_port_mod *pm)
3071 if (oh->version == OFP10_VERSION) {
3072 const struct ofp10_port_mod *opm = (const struct ofp10_port_mod *) oh;
3074 if (oh->length != htons(sizeof *opm)) {
3075 return OFPERR_OFPBRC_BAD_LEN;
3078 pm->port_no = ntohs(opm->port_no);
3079 memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
3080 pm->config = ntohl(opm->config) & OFPPC10_ALL;
3081 pm->mask = ntohl(opm->mask) & OFPPC10_ALL;
3082 pm->advertise = netdev_port_features_from_ofp10(opm->advertise);
3083 } else if (oh->version == OFP11_VERSION) {
3084 const struct ofp11_port_mod *opm = (const struct ofp11_port_mod *) oh;
3087 if (oh->length != htons(sizeof *opm)) {
3088 return OFPERR_OFPBRC_BAD_LEN;
3091 error = ofputil_port_from_ofp11(opm->port_no, &pm->port_no);
3096 memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
3097 pm->config = ntohl(opm->config) & OFPPC11_ALL;
3098 pm->mask = ntohl(opm->mask) & OFPPC11_ALL;
3099 pm->advertise = netdev_port_features_from_ofp11(opm->advertise);
3101 return OFPERR_OFPBRC_BAD_VERSION;
3104 pm->config &= pm->mask;
3108 /* Converts the abstract form of a "port mod" message in '*pm' into an OpenFlow
3109 * message suitable for 'protocol', and returns that encoded form in a buffer
3110 * owned by the caller. */
3112 ofputil_encode_port_mod(const struct ofputil_port_mod *pm,
3113 enum ofputil_protocol protocol)
3115 uint8_t ofp_version = ofputil_protocol_to_ofp_version(protocol);
3118 if (ofp_version == OFP10_VERSION) {
3119 struct ofp10_port_mod *opm;
3121 opm = make_openflow(sizeof *opm, OFPT10_PORT_MOD, &b);
3122 opm->port_no = htons(pm->port_no);
3123 memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
3124 opm->config = htonl(pm->config & OFPPC10_ALL);
3125 opm->mask = htonl(pm->mask & OFPPC10_ALL);
3126 opm->advertise = netdev_port_features_to_ofp10(pm->advertise);
3127 } else if (ofp_version == OFP11_VERSION) {
3128 struct ofp11_port_mod *opm;
3130 opm = make_openflow(sizeof *opm, OFPT11_PORT_MOD, &b);
3131 opm->port_no = htonl(pm->port_no);
3132 memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
3133 opm->config = htonl(pm->config & OFPPC11_ALL);
3134 opm->mask = htonl(pm->mask & OFPPC11_ALL);
3135 opm->advertise = netdev_port_features_to_ofp11(pm->advertise);
3143 /* ofputil_flow_monitor_request */
3145 /* Converts an NXST_FLOW_MONITOR request in 'msg' into an abstract
3146 * ofputil_flow_monitor_request in 'rq'.
3148 * Multiple NXST_FLOW_MONITOR requests can be packed into a single OpenFlow
3149 * message. Calling this function multiple times for a single 'msg' iterates
3150 * through the requests. The caller must initially leave 'msg''s layer
3151 * pointers null and not modify them between calls.
3153 * Returns 0 if successful, EOF if no requests were left in this 'msg',
3154 * otherwise an OFPERR_* value. */
3156 ofputil_decode_flow_monitor_request(struct ofputil_flow_monitor_request *rq,
3159 struct nx_flow_monitor_request *nfmr;
3163 msg->l2 = msg->data;
3164 ofpbuf_pull(msg, sizeof(struct nicira_stats_msg));
3171 nfmr = ofpbuf_try_pull(msg, sizeof *nfmr);
3173 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR request has %zu "
3174 "leftover bytes at end", msg->size);
3175 return OFPERR_OFPBRC_BAD_LEN;
3178 flags = ntohs(nfmr->flags);
3179 if (!(flags & (NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY))
3180 || flags & ~(NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE
3181 | NXFMF_MODIFY | NXFMF_ACTIONS | NXFMF_OWN)) {
3182 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR has bad flags %#"PRIx16,
3184 return OFPERR_NXBRC_FM_BAD_FLAGS;
3187 if (!is_all_zeros(nfmr->zeros, sizeof nfmr->zeros)) {
3188 return OFPERR_NXBRC_MUST_BE_ZERO;
3191 rq->id = ntohl(nfmr->id);
3193 rq->out_port = ntohs(nfmr->out_port);
3194 rq->table_id = nfmr->table_id;
3196 return nx_pull_match(msg, ntohs(nfmr->match_len), OFP_DEFAULT_PRIORITY,
3197 &rq->match, NULL, NULL);
3201 ofputil_append_flow_monitor_request(
3202 const struct ofputil_flow_monitor_request *rq, struct ofpbuf *msg)
3204 struct nx_flow_monitor_request *nfmr;
3209 ofputil_put_stats_header(alloc_xid(), OFPT10_STATS_REQUEST,
3210 htons(OFPST_VENDOR),
3211 htonl(NXST_FLOW_MONITOR), msg);
3214 start_ofs = msg->size;
3215 ofpbuf_put_zeros(msg, sizeof *nfmr);
3216 match_len = nx_put_match(msg, false, &rq->match, htonll(0), htonll(0));
3218 nfmr = ofpbuf_at_assert(msg, start_ofs, sizeof *nfmr);
3219 nfmr->id = htonl(rq->id);
3220 nfmr->flags = htons(rq->flags);
3221 nfmr->out_port = htons(rq->out_port);
3222 nfmr->match_len = htons(match_len);
3223 nfmr->table_id = rq->table_id;
3226 /* Converts an NXST_FLOW_MONITOR reply (also known as a flow update) in 'msg'
3227 * into an abstract ofputil_flow_update in 'update'. The caller must have
3228 * initialized update->match to point to space allocated for a cls_rule.
3230 * Uses 'ofpacts' to store the abstract OFPACT_* version of the update's
3231 * actions (except for NXFME_ABBREV, which never includes actions). The caller
3232 * must initialize 'ofpacts' and retains ownership of it. 'update->ofpacts'
3233 * will point into the 'ofpacts' buffer.
3235 * Multiple flow updates can be packed into a single OpenFlow message. Calling
3236 * this function multiple times for a single 'msg' iterates through the
3237 * updates. The caller must initially leave 'msg''s layer pointers null and
3238 * not modify them between calls.
3240 * Returns 0 if successful, EOF if no updates were left in this 'msg',
3241 * otherwise an OFPERR_* value. */
3243 ofputil_decode_flow_update(struct ofputil_flow_update *update,
3244 struct ofpbuf *msg, struct ofpbuf *ofpacts)
3246 struct nx_flow_update_header *nfuh;
3247 unsigned int length;
3250 msg->l2 = msg->data;
3251 ofpbuf_pull(msg, sizeof(struct nicira_stats_msg));
3258 if (msg->size < sizeof(struct nx_flow_update_header)) {
3263 update->event = ntohs(nfuh->event);
3264 length = ntohs(nfuh->length);
3265 if (length > msg->size || length % 8) {
3269 if (update->event == NXFME_ABBREV) {
3270 struct nx_flow_update_abbrev *nfua;
3272 if (length != sizeof *nfua) {
3276 nfua = ofpbuf_pull(msg, sizeof *nfua);
3277 update->xid = nfua->xid;
3279 } else if (update->event == NXFME_ADDED
3280 || update->event == NXFME_DELETED
3281 || update->event == NXFME_MODIFIED) {
3282 struct nx_flow_update_full *nfuf;
3283 unsigned int actions_len;
3284 unsigned int match_len;
3287 if (length < sizeof *nfuf) {
3291 nfuf = ofpbuf_pull(msg, sizeof *nfuf);
3292 match_len = ntohs(nfuf->match_len);
3293 if (sizeof *nfuf + match_len > length) {
3297 update->reason = ntohs(nfuf->reason);
3298 update->idle_timeout = ntohs(nfuf->idle_timeout);
3299 update->hard_timeout = ntohs(nfuf->hard_timeout);
3300 update->table_id = nfuf->table_id;
3301 update->cookie = nfuf->cookie;
3303 error = nx_pull_match(msg, match_len, ntohs(nfuf->priority),
3304 update->match, NULL, NULL);
3309 actions_len = length - sizeof *nfuf - ROUND_UP(match_len, 8);
3310 error = ofpacts_pull_openflow10(msg, actions_len, ofpacts);
3315 update->ofpacts = ofpacts->data;
3316 update->ofpacts_len = ofpacts->size;
3319 VLOG_WARN_RL(&bad_ofmsg_rl,
3320 "NXST_FLOW_MONITOR reply has bad event %"PRIu16,
3321 ntohs(nfuh->event));
3322 return OFPERR_OFPET_BAD_REQUEST;
3326 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR reply has %zu "
3327 "leftover bytes at end", msg->size);
3328 return OFPERR_OFPBRC_BAD_LEN;
3332 ofputil_decode_flow_monitor_cancel(const struct ofp_header *oh)
3334 return ntohl(((const struct nx_flow_monitor_cancel *) oh)->id);
3338 ofputil_encode_flow_monitor_cancel(uint32_t id)
3340 struct nx_flow_monitor_cancel *nfmc;
3343 nfmc = make_nxmsg(sizeof *nfmc, NXT_FLOW_MONITOR_CANCEL, &msg);
3344 nfmc->id = htonl(id);
3349 ofputil_start_flow_update(struct list *replies)
3353 msg = ofpbuf_new(1024);
3354 ofputil_put_stats_header(htonl(0), OFPT10_STATS_REPLY,
3355 htons(OFPST_VENDOR),
3356 htonl(NXST_FLOW_MONITOR), msg);
3359 list_push_back(replies, &msg->list_node);
3363 ofputil_append_flow_update(const struct ofputil_flow_update *update,
3364 struct list *replies)
3366 struct nx_flow_update_header *nfuh;
3370 msg = ofpbuf_from_list(list_back(replies));
3371 start_ofs = msg->size;
3373 if (update->event == NXFME_ABBREV) {
3374 struct nx_flow_update_abbrev *nfua;
3376 nfua = ofpbuf_put_zeros(msg, sizeof *nfua);
3377 nfua->xid = update->xid;
3379 struct nx_flow_update_full *nfuf;
3382 ofpbuf_put_zeros(msg, sizeof *nfuf);
3383 match_len = nx_put_match(msg, false, update->match,
3384 htonll(0), htonll(0));
3385 ofpacts_put_openflow10(update->ofpacts, update->ofpacts_len, msg);
3387 nfuf = ofpbuf_at_assert(msg, start_ofs, sizeof *nfuf);
3388 nfuf->reason = htons(update->reason);
3389 nfuf->priority = htons(update->match->priority);
3390 nfuf->idle_timeout = htons(update->idle_timeout);
3391 nfuf->hard_timeout = htons(update->hard_timeout);
3392 nfuf->match_len = htons(match_len);
3393 nfuf->table_id = update->table_id;
3394 nfuf->cookie = update->cookie;
3397 nfuh = ofpbuf_at_assert(msg, start_ofs, sizeof *nfuh);
3398 nfuh->length = htons(msg->size - start_ofs);
3399 nfuh->event = htons(update->event);
3401 ofputil_postappend_stats_reply(start_ofs, replies);
3405 ofputil_encode_packet_out(const struct ofputil_packet_out *po)
3407 struct ofp_packet_out *opo;
3411 size = sizeof *opo + po->ofpacts_len;
3412 if (po->buffer_id == UINT32_MAX) {
3413 size += po->packet_len;
3416 msg = ofpbuf_new(size);
3417 put_openflow(sizeof *opo, OFPT_PACKET_OUT, msg);
3418 ofpacts_put_openflow10(po->ofpacts, po->ofpacts_len, msg);
3421 opo->buffer_id = htonl(po->buffer_id);
3422 opo->in_port = htons(po->in_port);
3423 opo->actions_len = htons(msg->size - sizeof *opo);
3425 if (po->buffer_id == UINT32_MAX) {
3426 ofpbuf_put(msg, po->packet, po->packet_len);
3429 update_openflow_length(msg);
3434 /* Returns a string representing the message type of 'type'. The string is the
3435 * enumeration constant for the type, e.g. "OFPT_HELLO". For statistics
3436 * messages, the constant is followed by "request" or "reply",
3437 * e.g. "OFPST_AGGREGATE reply". */
3439 ofputil_msg_type_name(const struct ofputil_msg_type *type)
3444 /* Allocates and stores in '*bufferp' a new ofpbuf with a size of
3445 * 'openflow_len', starting with an OpenFlow header with the given 'type' and
3446 * an arbitrary transaction id. Allocated bytes beyond the header, if any, are
3449 * The caller is responsible for freeing '*bufferp' when it is no longer
3452 * The OpenFlow header length is initially set to 'openflow_len'; if the
3453 * message is later extended, the length should be updated with
3454 * update_openflow_length() before sending.
3456 * Returns the header. */
3458 make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **bufferp)
3460 *bufferp = ofpbuf_new(openflow_len);
3461 return put_openflow_xid(openflow_len, type, alloc_xid(), *bufferp);
3464 /* Similar to make_openflow() but creates a Nicira vendor extension message
3465 * with the specific 'subtype'. 'subtype' should be in host byte order. */
3467 make_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf **bufferp)
3469 return make_nxmsg_xid(openflow_len, subtype, alloc_xid(), bufferp);
3472 /* Allocates and stores in '*bufferp' a new ofpbuf with a size of
3473 * 'openflow_len', starting with an OpenFlow header with the given 'type' and
3474 * transaction id 'xid'. Allocated bytes beyond the header, if any, are
3477 * The caller is responsible for freeing '*bufferp' when it is no longer
3480 * The OpenFlow header length is initially set to 'openflow_len'; if the
3481 * message is later extended, the length should be updated with
3482 * update_openflow_length() before sending.
3484 * Returns the header. */
3486 make_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid,
3487 struct ofpbuf **bufferp)
3489 *bufferp = ofpbuf_new(openflow_len);
3490 return put_openflow_xid(openflow_len, type, xid, *bufferp);
3493 /* Similar to make_openflow_xid() but creates a Nicira vendor extension message
3494 * with the specific 'subtype'. 'subtype' should be in host byte order. */
3496 make_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid,
3497 struct ofpbuf **bufferp)
3499 *bufferp = ofpbuf_new(openflow_len);
3500 return put_nxmsg_xid(openflow_len, subtype, xid, *bufferp);
3503 /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
3504 * with the given 'type' and an arbitrary transaction id. Allocated bytes
3505 * beyond the header, if any, are zeroed.
3507 * The OpenFlow header length is initially set to 'openflow_len'; if the
3508 * message is later extended, the length should be updated with
3509 * update_openflow_length() before sending.
3511 * Returns the header. */
3513 put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *buffer)
3515 return put_openflow_xid(openflow_len, type, alloc_xid(), buffer);
3518 /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
3519 * with the given 'type' and an transaction id 'xid'. Allocated bytes beyond
3520 * the header, if any, are zeroed.
3522 * The OpenFlow header length is initially set to 'openflow_len'; if the
3523 * message is later extended, the length should be updated with
3524 * update_openflow_length() before sending.
3526 * Returns the header. */
3528 put_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid,
3529 struct ofpbuf *buffer)
3531 struct ofp_header *oh;
3533 assert(openflow_len >= sizeof *oh);
3534 assert(openflow_len <= UINT16_MAX);
3536 oh = ofpbuf_put_uninit(buffer, openflow_len);
3537 oh->version = OFP10_VERSION;
3539 oh->length = htons(openflow_len);
3541 memset(oh + 1, 0, openflow_len - sizeof *oh);
3545 /* Similar to put_openflow() but append a Nicira vendor extension message with
3546 * the specific 'subtype'. 'subtype' should be in host byte order. */
3548 put_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf *buffer)
3550 return put_nxmsg_xid(openflow_len, subtype, alloc_xid(), buffer);
3553 /* Similar to put_openflow_xid() but append a Nicira vendor extension message
3554 * with the specific 'subtype'. 'subtype' should be in host byte order. */
3556 put_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid,
3557 struct ofpbuf *buffer)
3559 struct nicira_header *nxh;
3561 nxh = put_openflow_xid(openflow_len, OFPT_VENDOR, xid, buffer);
3562 nxh->vendor = htonl(NX_VENDOR_ID);
3563 nxh->subtype = htonl(subtype);
3567 /* Updates the 'length' field of the OpenFlow message in 'buffer' to
3568 * 'buffer->size'. */
3570 update_openflow_length(struct ofpbuf *buffer)
3572 struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh);
3573 oh->length = htons(buffer->size);
3577 ofputil_put_stats_header(ovs_be32 xid, uint8_t ofp_type,
3578 ovs_be16 ofpst_type, ovs_be32 nxst_subtype,
3581 if (ofpst_type == htons(OFPST_VENDOR)) {
3582 struct nicira_stats_msg *nsm;
3584 nsm = put_openflow_xid(sizeof *nsm, ofp_type, xid, msg);
3585 nsm->vsm.osm.type = ofpst_type;
3586 nsm->vsm.vendor = htonl(NX_VENDOR_ID);
3587 nsm->subtype = nxst_subtype;
3589 struct ofp_stats_msg *osm;
3591 osm = put_openflow_xid(sizeof *osm, ofp_type, xid, msg);
3592 osm->type = ofpst_type;
3596 /* Creates a statistics request message with total length 'openflow_len'
3597 * (including all headers) and the given 'ofpst_type', and stores the buffer
3598 * containing the new message in '*bufferp'. If 'ofpst_type' is OFPST_VENDOR
3599 * then 'nxst_subtype' is used as the Nicira vendor extension statistics
3600 * subtype (otherwise 'nxst_subtype' is ignored).
3602 * Initializes bytes following the headers to all-bits-zero.
3604 * Returns the first byte of the new message. */
3606 ofputil_make_stats_request(size_t openflow_len, uint16_t ofpst_type,
3607 uint32_t nxst_subtype, struct ofpbuf **bufferp)
3611 msg = *bufferp = ofpbuf_new(openflow_len);
3612 ofputil_put_stats_header(alloc_xid(), OFPT10_STATS_REQUEST,
3613 htons(ofpst_type), htonl(nxst_subtype), msg);
3614 ofpbuf_padto(msg, openflow_len);
3620 put_stats_reply__(const struct ofp_stats_msg *request, struct ofpbuf *msg)
3622 ovs_be32 nxst_subtype;
3624 assert(request->header.type == OFPT10_STATS_REQUEST ||
3625 request->header.type == OFPT10_STATS_REPLY);
3627 nxst_subtype = (request->type != htons(OFPST_VENDOR)
3629 : ((const struct nicira_stats_msg *) request)->subtype);
3630 ofputil_put_stats_header(request->header.xid, OFPT10_STATS_REPLY,
3631 request->type, nxst_subtype, msg);
3634 /* Creates a statistics reply message with total length 'openflow_len'
3635 * (including all headers) and the same type (either a standard OpenFlow
3636 * statistics type or a Nicira extension type and subtype) as 'request', and
3637 * stores the buffer containing the new message in '*bufferp'.
3639 * Initializes bytes following the headers to all-bits-zero.
3641 * Returns the first byte of the new message. */
3643 ofputil_make_stats_reply(size_t openflow_len,
3644 const struct ofp_stats_msg *request,
3645 struct ofpbuf **bufferp)
3649 msg = *bufferp = ofpbuf_new(openflow_len);
3650 put_stats_reply__(request, msg);
3651 ofpbuf_padto(msg, openflow_len);
3656 /* Initializes 'replies' as a list of ofpbufs that will contain a series of
3657 * replies to 'request', which should be an OpenFlow or Nicira extension
3658 * statistics request. Initially 'replies' will have a single reply message
3659 * that has only a header. The functions ofputil_reserve_stats_reply() and
3660 * ofputil_append_stats_reply() may be used to add to the reply. */
3662 ofputil_start_stats_reply(const struct ofp_stats_msg *request,
3663 struct list *replies)
3667 msg = ofpbuf_new(1024);
3668 put_stats_reply__(request, msg);
3671 list_push_back(replies, &msg->list_node);
3674 /* Prepares to append up to 'len' bytes to the series of statistics replies in
3675 * 'replies', which should have been initialized with
3676 * ofputil_start_stats_reply(). Returns an ofpbuf with at least 'len' bytes of
3677 * tailroom. (The 'len' bytes have not actually be allocated; the caller must
3678 * do so with e.g. ofpbuf_put_uninit().) */
3680 ofputil_reserve_stats_reply(size_t len, struct list *replies)
3682 struct ofpbuf *msg = ofpbuf_from_list(list_back(replies));
3683 struct ofp_stats_msg *osm = msg->data;
3685 if (msg->size + len <= UINT16_MAX) {
3686 ofpbuf_prealloc_tailroom(msg, len);
3688 osm->flags |= htons(OFPSF_REPLY_MORE);
3690 msg = ofpbuf_new(MAX(1024, sizeof(struct nicira_stats_msg) + len));
3691 put_stats_reply__(osm, msg);
3692 list_push_back(replies, &msg->list_node);
3697 /* Appends 'len' bytes to the series of statistics replies in 'replies', and
3698 * returns the first byte. */
3700 ofputil_append_stats_reply(size_t len, struct list *replies)
3702 return ofpbuf_put_uninit(ofputil_reserve_stats_reply(len, replies), len);
3705 /* Sometimes, when composing stats replies, it's difficult to predict how long
3706 * an individual reply chunk will be before actually encoding it into the reply
3707 * buffer. This function allows easy handling of this case: just encode the
3708 * reply, then use this function to break the message into two pieces if it
3709 * exceeds the OpenFlow message limit.
3711 * In detail, if the final stats message in 'replies' is too long for OpenFlow,
3712 * this function breaks it into two separate stats replies, the first one with
3713 * the first 'start_ofs' bytes, the second one containing the bytes from that
3716 ofputil_postappend_stats_reply(size_t start_ofs, struct list *replies)
3718 struct ofpbuf *msg = ofpbuf_from_list(list_back(replies));
3720 assert(start_ofs <= UINT16_MAX);
3721 if (msg->size > UINT16_MAX) {
3722 size_t len = msg->size - start_ofs;
3723 memcpy(ofputil_append_stats_reply(len, replies),
3724 (const uint8_t *) msg->data + start_ofs, len);
3725 msg->size = start_ofs;
3729 /* Returns the first byte past the ofp_stats_msg header in 'oh'. */
3731 ofputil_stats_body(const struct ofp_header *oh)
3733 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3734 return (const struct ofp_stats_msg *) oh + 1;
3737 /* Returns the number of bytes past the ofp_stats_msg header in 'oh'. */
3739 ofputil_stats_body_len(const struct ofp_header *oh)
3741 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3742 return ntohs(oh->length) - sizeof(struct ofp_stats_msg);
3745 /* Returns the first byte past the nicira_stats_msg header in 'oh'. */
3747 ofputil_nxstats_body(const struct ofp_header *oh)
3749 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3750 return ((const struct nicira_stats_msg *) oh) + 1;
3753 /* Returns the number of bytes past the nicira_stats_msg header in 'oh'. */
3755 ofputil_nxstats_body_len(const struct ofp_header *oh)
3757 assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY);
3758 return ntohs(oh->length) - sizeof(struct nicira_stats_msg);
3761 /* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
3763 make_echo_request(void)
3765 struct ofp_header *rq;
3766 struct ofpbuf *out = ofpbuf_new(sizeof *rq);
3767 rq = ofpbuf_put_uninit(out, sizeof *rq);
3768 rq->version = OFP10_VERSION;
3769 rq->type = OFPT_ECHO_REQUEST;
3770 rq->length = htons(sizeof *rq);
3775 /* Creates and returns an OFPT_ECHO_REPLY message matching the
3776 * OFPT_ECHO_REQUEST message in 'rq'. */
3778 make_echo_reply(const struct ofp_header *rq)
3780 size_t size = ntohs(rq->length);
3781 struct ofpbuf *out = ofpbuf_new(size);
3782 struct ofp_header *reply = ofpbuf_put(out, rq, size);
3783 reply->type = OFPT_ECHO_REPLY;
3788 ofputil_encode_barrier_request(void)
3792 make_openflow(sizeof(struct ofp_header), OFPT10_BARRIER_REQUEST, &msg);
3797 ofputil_frag_handling_to_string(enum ofp_config_flags flags)
3799 switch (flags & OFPC_FRAG_MASK) {
3800 case OFPC_FRAG_NORMAL: return "normal";
3801 case OFPC_FRAG_DROP: return "drop";
3802 case OFPC_FRAG_REASM: return "reassemble";
3803 case OFPC_FRAG_NX_MATCH: return "nx-match";
3810 ofputil_frag_handling_from_string(const char *s, enum ofp_config_flags *flags)
3812 if (!strcasecmp(s, "normal")) {
3813 *flags = OFPC_FRAG_NORMAL;
3814 } else if (!strcasecmp(s, "drop")) {
3815 *flags = OFPC_FRAG_DROP;
3816 } else if (!strcasecmp(s, "reassemble")) {
3817 *flags = OFPC_FRAG_REASM;
3818 } else if (!strcasecmp(s, "nx-match")) {
3819 *flags = OFPC_FRAG_NX_MATCH;
3826 /* Converts the OpenFlow 1.1+ port number 'ofp11_port' into an OpenFlow 1.0
3827 * port number and stores the latter in '*ofp10_port', for the purpose of
3828 * decoding OpenFlow 1.1+ protocol messages. Returns 0 if successful,
3829 * otherwise an OFPERR_* number.
3831 * See the definition of OFP11_MAX for an explanation of the mapping. */
3833 ofputil_port_from_ofp11(ovs_be32 ofp11_port, uint16_t *ofp10_port)
3835 uint32_t ofp11_port_h = ntohl(ofp11_port);
3837 if (ofp11_port_h < OFPP_MAX) {
3838 *ofp10_port = ofp11_port_h;
3840 } else if (ofp11_port_h >= OFPP11_MAX) {
3841 *ofp10_port = ofp11_port_h - OFPP11_OFFSET;
3844 VLOG_WARN_RL(&bad_ofmsg_rl, "port %"PRIu32" is outside the supported "
3845 "range 0 through %d or 0x%"PRIx32" through 0x%"PRIx32,
3846 ofp11_port_h, OFPP_MAX - 1,
3847 (uint32_t) OFPP11_MAX, UINT32_MAX);
3848 return OFPERR_OFPBAC_BAD_OUT_PORT;
3852 /* Returns the OpenFlow 1.1+ port number equivalent to the OpenFlow 1.0 port
3853 * number 'ofp10_port', for encoding OpenFlow 1.1+ protocol messages.
3855 * See the definition of OFP11_MAX for an explanation of the mapping. */
3857 ofputil_port_to_ofp11(uint16_t ofp10_port)
3859 return htonl(ofp10_port < OFPP_MAX
3861 : ofp10_port + OFPP11_OFFSET);
3864 /* Checks that 'port' is a valid output port for the OFPAT10_OUTPUT action, given
3865 * that the switch will never have more than 'max_ports' ports. Returns 0 if
3866 * 'port' is valid, otherwise an OpenFlow return code. */
3868 ofputil_check_output_port(uint16_t port, int max_ports)
3876 case OFPP_CONTROLLER:
3882 if (port < max_ports) {
3885 return OFPERR_OFPBAC_BAD_OUT_PORT;
3889 #define OFPUTIL_NAMED_PORTS \
3890 OFPUTIL_NAMED_PORT(IN_PORT) \
3891 OFPUTIL_NAMED_PORT(TABLE) \
3892 OFPUTIL_NAMED_PORT(NORMAL) \
3893 OFPUTIL_NAMED_PORT(FLOOD) \
3894 OFPUTIL_NAMED_PORT(ALL) \
3895 OFPUTIL_NAMED_PORT(CONTROLLER) \
3896 OFPUTIL_NAMED_PORT(LOCAL) \
3897 OFPUTIL_NAMED_PORT(NONE)
3899 /* Checks whether 's' is the string representation of an OpenFlow port number,
3900 * either as an integer or a string name (e.g. "LOCAL"). If it is, stores the
3901 * number in '*port' and returns true. Otherwise, returns false. */
3903 ofputil_port_from_string(const char *name, uint16_t *port)
3909 static const struct pair pairs[] = {
3910 #define OFPUTIL_NAMED_PORT(NAME) {#NAME, OFPP_##NAME},
3912 #undef OFPUTIL_NAMED_PORT
3914 static const int n_pairs = ARRAY_SIZE(pairs);
3917 if (str_to_int(name, 0, &i) && i >= 0 && i < UINT16_MAX) {
3922 for (i = 0; i < n_pairs; i++) {
3923 if (!strcasecmp(name, pairs[i].name)) {
3924 *port = pairs[i].value;
3931 /* Appends to 's' a string representation of the OpenFlow port number 'port'.
3932 * Most ports' string representation is just the port number, but for special
3933 * ports, e.g. OFPP_LOCAL, it is the name, e.g. "LOCAL". */
3935 ofputil_format_port(uint16_t port, struct ds *s)
3940 #define OFPUTIL_NAMED_PORT(NAME) case OFPP_##NAME: name = #NAME; break;
3942 #undef OFPUTIL_NAMED_PORT
3945 ds_put_format(s, "%"PRIu16, port);
3948 ds_put_cstr(s, name);
3951 /* Given a buffer 'b' that contains an array of OpenFlow ports of type
3952 * 'ofp_version', tries to pull the first element from the array. If
3953 * successful, initializes '*pp' with an abstract representation of the
3954 * port and returns 0. If no ports remain to be decoded, returns EOF.
3955 * On an error, returns a positive OFPERR_* value. */
3957 ofputil_pull_phy_port(uint8_t ofp_version, struct ofpbuf *b,
3958 struct ofputil_phy_port *pp)
3960 if (ofp_version == OFP10_VERSION) {
3961 const struct ofp10_phy_port *opp = ofpbuf_try_pull(b, sizeof *opp);
3962 return opp ? ofputil_decode_ofp10_phy_port(pp, opp) : EOF;
3964 const struct ofp11_port *op = ofpbuf_try_pull(b, sizeof *op);
3965 return op ? ofputil_decode_ofp11_port(pp, op) : EOF;
3969 /* Given a buffer 'b' that contains an array of OpenFlow ports of type
3970 * 'ofp_version', returns the number of elements. */
3971 size_t ofputil_count_phy_ports(uint8_t ofp_version, struct ofpbuf *b)
3973 return b->size / ofputil_get_phy_port_size(ofp_version);
3976 /* Returns the 'enum ofputil_action_code' corresponding to 'name' (e.g. if
3977 * 'name' is "output" then the return value is OFPUTIL_OFPAT10_OUTPUT), or -1 if
3978 * 'name' is not the name of any action.
3980 * ofp-util.def lists the mapping from names to action. */
3982 ofputil_action_code_from_name(const char *name)
3984 static const char *names[OFPUTIL_N_ACTIONS] = {
3986 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) NAME,
3987 #define OFPAT11_ACTION(ENUM, STRUCT, NAME) NAME,
3988 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) NAME,
3989 #include "ofp-util.def"
3994 for (p = names; p < &names[ARRAY_SIZE(names)]; p++) {
3995 if (*p && !strcasecmp(name, *p)) {
4002 /* Appends an action of the type specified by 'code' to 'buf' and returns the
4003 * action. Initializes the parts of 'action' that identify it as having type
4004 * <ENUM> and length 'sizeof *action' and zeros the rest. For actions that
4005 * have variable length, the length used and cleared is that of struct
4008 ofputil_put_action(enum ofputil_action_code code, struct ofpbuf *buf)
4011 case OFPUTIL_ACTION_INVALID:
4014 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
4015 case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
4016 #define OFPAT11_ACTION OFPAT10_ACTION
4017 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
4018 case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
4019 #include "ofp-util.def"
4024 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
4026 ofputil_init_##ENUM(struct STRUCT *s) \
4028 memset(s, 0, sizeof *s); \
4029 s->type = htons(ENUM); \
4030 s->len = htons(sizeof *s); \
4034 ofputil_put_##ENUM(struct ofpbuf *buf) \
4036 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
4037 ofputil_init_##ENUM(s); \
4040 #define OFPAT11_ACTION OFPAT10_ACTION
4041 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
4043 ofputil_init_##ENUM(struct STRUCT *s) \
4045 memset(s, 0, sizeof *s); \
4046 s->type = htons(OFPAT10_VENDOR); \
4047 s->len = htons(sizeof *s); \
4048 s->vendor = htonl(NX_VENDOR_ID); \
4049 s->subtype = htons(ENUM); \
4053 ofputil_put_##ENUM(struct ofpbuf *buf) \
4055 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
4056 ofputil_init_##ENUM(s); \
4059 #include "ofp-util.def"
4061 /* "Normalizes" the wildcards in 'rule'. That means:
4063 * 1. If the type of level N is known, then only the valid fields for that
4064 * level may be specified. For example, ARP does not have a TOS field,
4065 * so nw_tos must be wildcarded if 'rule' specifies an ARP flow.
4066 * Similarly, IPv4 does not have any IPv6 addresses, so ipv6_src and
4067 * ipv6_dst (and other fields) must be wildcarded if 'rule' specifies an
4070 * 2. If the type of level N is not known (or not understood by Open
4071 * vSwitch), then no fields at all for that level may be specified. For
4072 * example, Open vSwitch does not understand SCTP, an L4 protocol, so the
4073 * L4 fields tp_src and tp_dst must be wildcarded if 'rule' specifies an
4077 ofputil_normalize_rule(struct cls_rule *rule)
4080 MAY_NW_ADDR = 1 << 0, /* nw_src, nw_dst */
4081 MAY_TP_ADDR = 1 << 1, /* tp_src, tp_dst */
4082 MAY_NW_PROTO = 1 << 2, /* nw_proto */
4083 MAY_IPVx = 1 << 3, /* tos, frag, ttl */
4084 MAY_ARP_SHA = 1 << 4, /* arp_sha */
4085 MAY_ARP_THA = 1 << 5, /* arp_tha */
4086 MAY_IPV6 = 1 << 6, /* ipv6_src, ipv6_dst, ipv6_label */
4087 MAY_ND_TARGET = 1 << 7 /* nd_target */
4090 struct flow_wildcards wc;
4092 /* Figure out what fields may be matched. */
4093 if (rule->flow.dl_type == htons(ETH_TYPE_IP)) {
4094 may_match = MAY_NW_PROTO | MAY_IPVx | MAY_NW_ADDR;
4095 if (rule->flow.nw_proto == IPPROTO_TCP ||
4096 rule->flow.nw_proto == IPPROTO_UDP ||
4097 rule->flow.nw_proto == IPPROTO_ICMP) {
4098 may_match |= MAY_TP_ADDR;
4100 } else if (rule->flow.dl_type == htons(ETH_TYPE_IPV6)) {
4101 may_match = MAY_NW_PROTO | MAY_IPVx | MAY_IPV6;
4102 if (rule->flow.nw_proto == IPPROTO_TCP ||
4103 rule->flow.nw_proto == IPPROTO_UDP) {
4104 may_match |= MAY_TP_ADDR;
4105 } else if (rule->flow.nw_proto == IPPROTO_ICMPV6) {
4106 may_match |= MAY_TP_ADDR;
4107 if (rule->flow.tp_src == htons(ND_NEIGHBOR_SOLICIT)) {
4108 may_match |= MAY_ND_TARGET | MAY_ARP_SHA;
4109 } else if (rule->flow.tp_src == htons(ND_NEIGHBOR_ADVERT)) {
4110 may_match |= MAY_ND_TARGET | MAY_ARP_THA;
4113 } else if (rule->flow.dl_type == htons(ETH_TYPE_ARP)) {
4114 may_match = MAY_NW_PROTO | MAY_NW_ADDR | MAY_ARP_SHA | MAY_ARP_THA;
4119 /* Clear the fields that may not be matched. */
4121 if (!(may_match & MAY_NW_ADDR)) {
4122 wc.nw_src_mask = wc.nw_dst_mask = htonl(0);
4124 if (!(may_match & MAY_TP_ADDR)) {
4125 wc.tp_src_mask = wc.tp_dst_mask = htons(0);
4127 if (!(may_match & MAY_NW_PROTO)) {
4128 wc.wildcards |= FWW_NW_PROTO;
4130 if (!(may_match & MAY_IPVx)) {
4131 wc.wildcards |= FWW_NW_DSCP;
4132 wc.wildcards |= FWW_NW_ECN;
4133 wc.wildcards |= FWW_NW_TTL;
4135 if (!(may_match & MAY_ARP_SHA)) {
4136 memset(wc.arp_sha_mask, 0, ETH_ADDR_LEN);
4138 if (!(may_match & MAY_ARP_THA)) {
4139 memset(wc.arp_tha_mask, 0, ETH_ADDR_LEN);
4141 if (!(may_match & MAY_IPV6)) {
4142 wc.ipv6_src_mask = wc.ipv6_dst_mask = in6addr_any;
4143 wc.ipv6_label_mask = htonl(0);
4145 if (!(may_match & MAY_ND_TARGET)) {
4146 wc.nd_target_mask = in6addr_any;
4149 /* Log any changes. */
4150 if (!flow_wildcards_equal(&wc, &rule->wc)) {
4151 bool log = !VLOG_DROP_INFO(&bad_ofmsg_rl);
4152 char *pre = log ? cls_rule_to_string(rule) : NULL;
4155 cls_rule_zero_wildcarded_fields(rule);
4158 char *post = cls_rule_to_string(rule);
4159 VLOG_INFO("normalization changed ofp_match, details:");
4160 VLOG_INFO(" pre: %s", pre);
4161 VLOG_INFO("post: %s", post);
4168 /* Parses a key or a key-value pair from '*stringp'.
4170 * On success: Stores the key into '*keyp'. Stores the value, if present, into
4171 * '*valuep', otherwise an empty string. Advances '*stringp' past the end of
4172 * the key-value pair, preparing it for another call. '*keyp' and '*valuep'
4173 * are substrings of '*stringp' created by replacing some of its bytes by null
4174 * terminators. Returns true.
4176 * If '*stringp' is just white space or commas, sets '*keyp' and '*valuep' to
4177 * NULL and returns false. */
4179 ofputil_parse_key_value(char **stringp, char **keyp, char **valuep)
4181 char *pos, *key, *value;
4185 pos += strspn(pos, ", \t\r\n");
4187 *keyp = *valuep = NULL;
4192 key_len = strcspn(pos, ":=(, \t\r\n");
4193 if (key[key_len] == ':' || key[key_len] == '=') {
4194 /* The value can be separated by a colon. */
4197 value = key + key_len + 1;
4198 value_len = strcspn(value, ", \t\r\n");
4199 pos = value + value_len + (value[value_len] != '\0');
4200 value[value_len] = '\0';
4201 } else if (key[key_len] == '(') {
4202 /* The value can be surrounded by balanced parentheses. The outermost
4203 * set of parentheses is removed. */
4207 value = key + key_len + 1;
4208 for (value_len = 0; level > 0; value_len++) {
4209 switch (value[value_len]) {
4223 value[value_len - 1] = '\0';
4224 pos = value + value_len;
4226 /* There might be no value at all. */
4227 value = key + key_len; /* Will become the empty string below. */
4228 pos = key + key_len + (key[key_len] != '\0');
4230 key[key_len] = '\0';