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"
42 #include "unaligned.h"
43 #include "type-props.h"
46 VLOG_DEFINE_THIS_MODULE(ofp_util);
48 /* Rate limit for OpenFlow message parse errors. These always indicate a bug
49 * in the peer and so there's not much point in showing a lot of them. */
50 static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5);
52 /* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns
53 * an IP netmask with a 1 in each bit that must match and a 0 in each bit that
56 * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0
57 * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits,
58 * ..., 32 and higher wildcard the entire field. This is the *opposite* of the
59 * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are
62 ofputil_wcbits_to_netmask(int wcbits)
65 return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0;
68 /* Given the IP netmask 'netmask', returns the number of bits of the IP address
69 * that it wildcards, that is, the number of 0-bits in 'netmask', a number
70 * between 0 and 32 inclusive.
72 * If 'netmask' is not a CIDR netmask (see ip_is_cidr()), the return value will
73 * still be in the valid range but isn't otherwise meaningful. */
75 ofputil_netmask_to_wcbits(ovs_be32 netmask)
77 return 32 - ip_count_cidr_bits(netmask);
80 /* Converts the OpenFlow 1.0 wildcards in 'ofpfw' (OFPFW10_*) into a
81 * flow_wildcards in 'wc' for use in struct cls_rule. It is the caller's
82 * responsibility to handle the special case where the flow match's dl_vlan is
83 * set to OFP_VLAN_NONE. */
85 ofputil_wildcard_from_ofpfw10(uint32_t ofpfw, struct flow_wildcards *wc)
87 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
89 /* Initialize most of rule->wc. */
90 flow_wildcards_init_catchall(wc);
92 if (!(ofpfw & OFPFW10_IN_PORT)) {
93 wc->in_port_mask = UINT16_MAX;
96 if (!(ofpfw & OFPFW10_NW_TOS)) {
97 wc->nw_tos_mask |= IP_DSCP_MASK;
100 if (!(ofpfw & OFPFW10_NW_PROTO)) {
101 wc->nw_proto_mask = UINT8_MAX;
103 wc->nw_src_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW10_NW_SRC_SHIFT);
104 wc->nw_dst_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW10_NW_DST_SHIFT);
106 if (!(ofpfw & OFPFW10_TP_SRC)) {
107 wc->tp_src_mask = htons(UINT16_MAX);
109 if (!(ofpfw & OFPFW10_TP_DST)) {
110 wc->tp_dst_mask = htons(UINT16_MAX);
113 if (!(ofpfw & OFPFW10_DL_SRC)) {
114 memset(wc->dl_src_mask, 0xff, ETH_ADDR_LEN);
116 if (!(ofpfw & OFPFW10_DL_DST)) {
117 memset(wc->dl_dst_mask, 0xff, ETH_ADDR_LEN);
119 if (!(ofpfw & OFPFW10_DL_TYPE)) {
120 wc->dl_type_mask = htons(UINT16_MAX);
124 if (!(ofpfw & OFPFW10_DL_VLAN_PCP)) {
125 wc->vlan_tci_mask |= htons(VLAN_PCP_MASK | VLAN_CFI);
127 if (!(ofpfw & OFPFW10_DL_VLAN)) {
128 wc->vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI);
132 /* Converts the ofp10_match in 'match' into a cls_rule in 'rule', with the
133 * given 'priority'. */
135 ofputil_cls_rule_from_ofp10_match(const struct ofp10_match *match,
136 unsigned int priority, struct cls_rule *rule)
138 uint32_t ofpfw = ntohl(match->wildcards) & OFPFW10_ALL;
140 /* Initialize rule->priority, rule->wc. */
141 memset(rule->flow.zeros, 0, sizeof rule->flow.zeros);
142 rule->priority = !ofpfw ? UINT16_MAX : priority;
143 ofputil_wildcard_from_ofpfw10(ofpfw, &rule->wc);
145 /* Initialize most of rule->flow. */
146 rule->flow.nw_src = match->nw_src;
147 rule->flow.nw_dst = match->nw_dst;
148 rule->flow.in_port = ntohs(match->in_port);
149 rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type);
150 rule->flow.tp_src = match->tp_src;
151 rule->flow.tp_dst = match->tp_dst;
152 memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN);
153 memcpy(rule->flow.dl_dst, match->dl_dst, ETH_ADDR_LEN);
154 rule->flow.nw_tos = match->nw_tos & IP_DSCP_MASK;
155 rule->flow.nw_proto = match->nw_proto;
157 /* Translate VLANs. */
158 if (!(ofpfw & OFPFW10_DL_VLAN) &&
159 match->dl_vlan == htons(OFP10_VLAN_NONE)) {
160 /* Match only packets without 802.1Q header.
162 * When OFPFW10_DL_VLAN_PCP is wildcarded, this is obviously correct.
164 * If OFPFW10_DL_VLAN_PCP is matched, the flow match is contradictory,
165 * because we can't have a specific PCP without an 802.1Q header.
166 * However, older versions of OVS treated this as matching packets
167 * withut an 802.1Q header, so we do here too. */
168 rule->flow.vlan_tci = htons(0);
169 rule->wc.vlan_tci_mask = htons(0xffff);
171 ovs_be16 vid, pcp, tci;
173 vid = match->dl_vlan & htons(VLAN_VID_MASK);
174 pcp = htons((match->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK);
175 tci = vid | pcp | htons(VLAN_CFI);
176 rule->flow.vlan_tci = tci & rule->wc.vlan_tci_mask;
180 cls_rule_zero_wildcarded_fields(rule);
183 /* Convert 'rule' into the OpenFlow 1.0 match structure 'match'. */
185 ofputil_cls_rule_to_ofp10_match(const struct cls_rule *rule,
186 struct ofp10_match *match)
188 const struct flow_wildcards *wc = &rule->wc;
191 /* Figure out most OpenFlow wildcards. */
193 if (!wc->in_port_mask) {
194 ofpfw |= OFPFW10_IN_PORT;
196 if (!wc->dl_type_mask) {
197 ofpfw |= OFPFW10_DL_TYPE;
199 if (!wc->nw_proto_mask) {
200 ofpfw |= OFPFW10_NW_PROTO;
202 ofpfw |= (ofputil_netmask_to_wcbits(wc->nw_src_mask)
203 << OFPFW10_NW_SRC_SHIFT);
204 ofpfw |= (ofputil_netmask_to_wcbits(wc->nw_dst_mask)
205 << OFPFW10_NW_DST_SHIFT);
206 if (!(wc->nw_tos_mask & IP_DSCP_MASK)) {
207 ofpfw |= OFPFW10_NW_TOS;
209 if (!wc->tp_src_mask) {
210 ofpfw |= OFPFW10_TP_SRC;
212 if (!wc->tp_dst_mask) {
213 ofpfw |= OFPFW10_TP_DST;
215 if (eth_addr_is_zero(wc->dl_src_mask)) {
216 ofpfw |= OFPFW10_DL_SRC;
218 if (eth_addr_is_zero(wc->dl_dst_mask)) {
219 ofpfw |= OFPFW10_DL_DST;
222 /* Translate VLANs. */
223 match->dl_vlan = htons(0);
224 match->dl_vlan_pcp = 0;
225 if (rule->wc.vlan_tci_mask == htons(0)) {
226 ofpfw |= OFPFW10_DL_VLAN | OFPFW10_DL_VLAN_PCP;
227 } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI)
228 && !(rule->flow.vlan_tci & htons(VLAN_CFI))) {
229 match->dl_vlan = htons(OFP10_VLAN_NONE);
230 ofpfw |= OFPFW10_DL_VLAN_PCP;
232 if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) {
233 ofpfw |= OFPFW10_DL_VLAN;
235 match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci));
238 if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) {
239 ofpfw |= OFPFW10_DL_VLAN_PCP;
241 match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci);
245 /* Compose most of the match structure. */
246 match->wildcards = htonl(ofpfw);
247 match->in_port = htons(rule->flow.in_port);
248 memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
249 memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
250 match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
251 match->nw_src = rule->flow.nw_src;
252 match->nw_dst = rule->flow.nw_dst;
253 match->nw_tos = rule->flow.nw_tos & IP_DSCP_MASK;
254 match->nw_proto = rule->flow.nw_proto;
255 match->tp_src = rule->flow.tp_src;
256 match->tp_dst = rule->flow.tp_dst;
257 memset(match->pad1, '\0', sizeof match->pad1);
258 memset(match->pad2, '\0', sizeof match->pad2);
262 ofputil_pull_ofp11_match(struct ofpbuf *buf, unsigned int priority,
263 struct cls_rule *rule, uint16_t *padded_match_len)
265 struct ofp11_match_header *omh = buf->data;
268 if (buf->size < sizeof *omh) {
269 return OFPERR_OFPBMC_BAD_LEN;
272 match_len = ntohs(omh->length);
274 switch (ntohs(omh->type)) {
275 case OFPMT_STANDARD: {
276 struct ofp11_match *om;
278 if (match_len != sizeof *om || buf->size < sizeof *om) {
279 return OFPERR_OFPBMC_BAD_LEN;
281 om = ofpbuf_pull(buf, sizeof *om);
282 if (padded_match_len) {
283 *padded_match_len = match_len;
285 return ofputil_cls_rule_from_ofp11_match(om, priority, rule);
289 if (padded_match_len) {
290 *padded_match_len = ROUND_UP(match_len, 8);
292 return oxm_pull_match(buf, priority, rule);
295 return OFPERR_OFPBMC_BAD_TYPE;
299 /* Converts the ofp11_match in 'match' into a cls_rule in 'rule', with the
300 * given 'priority'. Returns 0 if successful, otherwise an OFPERR_* value. */
302 ofputil_cls_rule_from_ofp11_match(const struct ofp11_match *match,
303 unsigned int priority,
304 struct cls_rule *rule)
306 uint16_t wc = ntohl(match->wildcards);
307 uint8_t dl_src_mask[ETH_ADDR_LEN];
308 uint8_t dl_dst_mask[ETH_ADDR_LEN];
312 cls_rule_init_catchall(rule, priority);
314 if (!(wc & OFPFW11_IN_PORT)) {
318 error = ofputil_port_from_ofp11(match->in_port, &ofp_port);
320 return OFPERR_OFPBMC_BAD_VALUE;
322 cls_rule_set_in_port(rule, ofp_port);
325 for (i = 0; i < ETH_ADDR_LEN; i++) {
326 dl_src_mask[i] = ~match->dl_src_mask[i];
328 cls_rule_set_dl_src_masked(rule, match->dl_src, dl_src_mask);
330 for (i = 0; i < ETH_ADDR_LEN; i++) {
331 dl_dst_mask[i] = ~match->dl_dst_mask[i];
333 cls_rule_set_dl_dst_masked(rule, match->dl_dst, dl_dst_mask);
335 if (!(wc & OFPFW11_DL_VLAN)) {
336 if (match->dl_vlan == htons(OFPVID11_NONE)) {
337 /* Match only packets without a VLAN tag. */
338 rule->flow.vlan_tci = htons(0);
339 rule->wc.vlan_tci_mask = htons(UINT16_MAX);
341 if (match->dl_vlan == htons(OFPVID11_ANY)) {
342 /* Match any packet with a VLAN tag regardless of VID. */
343 rule->flow.vlan_tci = htons(VLAN_CFI);
344 rule->wc.vlan_tci_mask = htons(VLAN_CFI);
345 } else if (ntohs(match->dl_vlan) < 4096) {
346 /* Match only packets with the specified VLAN VID. */
347 rule->flow.vlan_tci = htons(VLAN_CFI) | match->dl_vlan;
348 rule->wc.vlan_tci_mask = htons(VLAN_CFI | VLAN_VID_MASK);
351 return OFPERR_OFPBMC_BAD_VALUE;
354 if (!(wc & OFPFW11_DL_VLAN_PCP)) {
355 if (match->dl_vlan_pcp <= 7) {
356 rule->flow.vlan_tci |= htons(match->dl_vlan_pcp
358 rule->wc.vlan_tci_mask |= htons(VLAN_PCP_MASK);
361 return OFPERR_OFPBMC_BAD_VALUE;
367 if (!(wc & OFPFW11_DL_TYPE)) {
368 cls_rule_set_dl_type(rule,
369 ofputil_dl_type_from_openflow(match->dl_type));
372 ipv4 = rule->flow.dl_type == htons(ETH_TYPE_IP);
373 arp = rule->flow.dl_type == htons(ETH_TYPE_ARP);
375 if (ipv4 && !(wc & OFPFW11_NW_TOS)) {
376 if (match->nw_tos & ~IP_DSCP_MASK) {
378 return OFPERR_OFPBMC_BAD_VALUE;
381 cls_rule_set_nw_dscp(rule, match->nw_tos);
385 if (!(wc & OFPFW11_NW_PROTO)) {
386 cls_rule_set_nw_proto(rule, match->nw_proto);
388 cls_rule_set_nw_src_masked(rule, match->nw_src, ~match->nw_src_mask);
389 cls_rule_set_nw_dst_masked(rule, match->nw_dst, ~match->nw_dst_mask);
392 #define OFPFW11_TP_ALL (OFPFW11_TP_SRC | OFPFW11_TP_DST)
393 if (ipv4 && (wc & OFPFW11_TP_ALL) != OFPFW11_TP_ALL) {
394 switch (rule->flow.nw_proto) {
396 /* "A.2.3 Flow Match Structures" in OF1.1 says:
398 * The tp_src and tp_dst fields will be ignored unless the
399 * network protocol specified is as TCP, UDP or SCTP.
401 * but I'm pretty sure we should support ICMP too, otherwise
402 * that's a regression from OF1.0. */
403 if (!(wc & OFPFW11_TP_SRC)) {
404 uint16_t icmp_type = ntohs(match->tp_src);
405 if (icmp_type < 0x100) {
406 cls_rule_set_icmp_type(rule, icmp_type);
408 return OFPERR_OFPBMC_BAD_FIELD;
411 if (!(wc & OFPFW11_TP_DST)) {
412 uint16_t icmp_code = ntohs(match->tp_dst);
413 if (icmp_code < 0x100) {
414 cls_rule_set_icmp_code(rule, icmp_code);
416 return OFPERR_OFPBMC_BAD_FIELD;
423 if (!(wc & (OFPFW11_TP_SRC))) {
424 cls_rule_set_tp_src(rule, match->tp_src);
426 if (!(wc & (OFPFW11_TP_DST))) {
427 cls_rule_set_tp_dst(rule, match->tp_dst);
432 /* We don't support SCTP and it seems that we should tell the
433 * controller, since OF1.1 implementations are supposed to. */
434 return OFPERR_OFPBMC_BAD_FIELD;
437 /* OF1.1 says explicitly to ignore this. */
442 if (rule->flow.dl_type == htons(ETH_TYPE_MPLS) ||
443 rule->flow.dl_type == htons(ETH_TYPE_MPLS_MCAST)) {
444 enum { OFPFW11_MPLS_ALL = OFPFW11_MPLS_LABEL | OFPFW11_MPLS_TC };
446 if ((wc & OFPFW11_MPLS_ALL) != OFPFW11_MPLS_ALL) {
447 /* MPLS not supported. */
448 return OFPERR_OFPBMC_BAD_TAG;
452 if (match->metadata_mask != htonll(UINT64_MAX)) {
453 cls_rule_set_metadata_masked(rule, match->metadata,
454 ~match->metadata_mask);
460 /* Convert 'rule' into the OpenFlow 1.1 match structure 'match'. */
462 ofputil_cls_rule_to_ofp11_match(const struct cls_rule *rule,
463 struct ofp11_match *match)
468 memset(match, 0, sizeof *match);
469 match->omh.type = htons(OFPMT_STANDARD);
470 match->omh.length = htons(OFPMT11_STANDARD_LENGTH);
472 if (!rule->wc.in_port_mask) {
473 wc |= OFPFW11_IN_PORT;
475 match->in_port = ofputil_port_to_ofp11(rule->flow.in_port);
478 memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
479 for (i = 0; i < ETH_ADDR_LEN; i++) {
480 match->dl_src_mask[i] = ~rule->wc.dl_src_mask[i];
483 memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
484 for (i = 0; i < ETH_ADDR_LEN; i++) {
485 match->dl_dst_mask[i] = ~rule->wc.dl_dst_mask[i];
488 if (rule->wc.vlan_tci_mask == htons(0)) {
489 wc |= OFPFW11_DL_VLAN | OFPFW11_DL_VLAN_PCP;
490 } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI)
491 && !(rule->flow.vlan_tci & htons(VLAN_CFI))) {
492 match->dl_vlan = htons(OFPVID11_NONE);
493 wc |= OFPFW11_DL_VLAN_PCP;
495 if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) {
496 match->dl_vlan = htons(OFPVID11_ANY);
498 match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci));
501 if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) {
502 wc |= OFPFW11_DL_VLAN_PCP;
504 match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci);
508 if (!rule->wc.dl_type_mask) {
509 wc |= OFPFW11_DL_TYPE;
511 match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
514 if (!(rule->wc.nw_tos_mask & IP_DSCP_MASK)) {
515 wc |= OFPFW11_NW_TOS;
517 match->nw_tos = rule->flow.nw_tos & IP_DSCP_MASK;
520 if (!rule->wc.nw_proto_mask) {
521 wc |= OFPFW11_NW_PROTO;
523 match->nw_proto = rule->flow.nw_proto;
526 match->nw_src = rule->flow.nw_src;
527 match->nw_src_mask = ~rule->wc.nw_src_mask;
528 match->nw_dst = rule->flow.nw_dst;
529 match->nw_dst_mask = ~rule->wc.nw_dst_mask;
531 if (!rule->wc.tp_src_mask) {
532 wc |= OFPFW11_TP_SRC;
534 match->tp_src = rule->flow.tp_src;
537 if (!rule->wc.tp_dst_mask) {
538 wc |= OFPFW11_TP_DST;
540 match->tp_dst = rule->flow.tp_dst;
543 /* MPLS not supported. */
544 wc |= OFPFW11_MPLS_LABEL;
545 wc |= OFPFW11_MPLS_TC;
547 match->metadata = rule->flow.metadata;
548 match->metadata_mask = ~rule->wc.metadata_mask;
550 match->wildcards = htonl(wc);
553 /* Given a 'dl_type' value in the format used in struct flow, returns the
554 * corresponding 'dl_type' value for use in an ofp10_match or ofp11_match
557 ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type)
559 return (flow_dl_type == htons(FLOW_DL_TYPE_NONE)
560 ? htons(OFP_DL_TYPE_NOT_ETH_TYPE)
564 /* Given a 'dl_type' value in the format used in an ofp10_match or ofp11_match
565 * structure, returns the corresponding 'dl_type' value for use in struct
568 ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type)
570 return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)
571 ? htons(FLOW_DL_TYPE_NONE)
577 struct proto_abbrev {
578 enum ofputil_protocol protocol;
582 /* Most users really don't care about some of the differences between
583 * protocols. These abbreviations help with that. */
584 static const struct proto_abbrev proto_abbrevs[] = {
585 { OFPUTIL_P_ANY, "any" },
586 { OFPUTIL_P_OF10_ANY, "OpenFlow10" },
587 { OFPUTIL_P_NXM_ANY, "NXM" },
589 #define N_PROTO_ABBREVS ARRAY_SIZE(proto_abbrevs)
591 enum ofputil_protocol ofputil_flow_dump_protocols[] = {
595 size_t ofputil_n_flow_dump_protocols = ARRAY_SIZE(ofputil_flow_dump_protocols);
597 /* Returns the ofputil_protocol that is initially in effect on an OpenFlow
598 * connection that has negotiated the given 'version'. 'version' should
599 * normally be an 8-bit OpenFlow version identifier (e.g. 0x01 for OpenFlow
600 * 1.0, 0x02 for OpenFlow 1.1). Returns 0 if 'version' is not supported or
601 * outside the valid range. */
602 enum ofputil_protocol
603 ofputil_protocol_from_ofp_version(enum ofp_version version)
607 return OFPUTIL_P_OF10;
609 return OFPUTIL_P_OF12;
616 /* Returns the OpenFlow protocol version number (e.g. OFP10_VERSION,
617 * OFP11_VERSION or OFP12_VERSION) that corresponds to 'protocol'. */
619 ofputil_protocol_to_ofp_version(enum ofputil_protocol protocol)
623 case OFPUTIL_P_OF10_TID:
625 case OFPUTIL_P_NXM_TID:
626 return OFP10_VERSION;
628 return OFP12_VERSION;
634 /* Returns true if 'protocol' is a single OFPUTIL_P_* value, false
637 ofputil_protocol_is_valid(enum ofputil_protocol protocol)
639 return protocol & OFPUTIL_P_ANY && is_pow2(protocol);
642 /* Returns the equivalent of 'protocol' with the Nicira flow_mod_table_id
643 * extension turned on or off if 'enable' is true or false, respectively.
645 * This extension is only useful for protocols whose "standard" version does
646 * not allow specific tables to be modified. In particular, this is true of
647 * OpenFlow 1.0. In later versions of OpenFlow, a flow_mod request always
648 * specifies a table ID and so there is no need for such an extension. When
649 * 'protocol' is such a protocol that doesn't need a flow_mod_table_id
650 * extension, this function just returns its 'protocol' argument unchanged
651 * regardless of the value of 'enable'. */
652 enum ofputil_protocol
653 ofputil_protocol_set_tid(enum ofputil_protocol protocol, bool enable)
657 case OFPUTIL_P_OF10_TID:
658 return enable ? OFPUTIL_P_OF10_TID : OFPUTIL_P_OF10;
661 case OFPUTIL_P_NXM_TID:
662 return enable ? OFPUTIL_P_NXM_TID : OFPUTIL_P_NXM;
665 return OFPUTIL_P_OF12;
672 /* Returns the "base" version of 'protocol'. That is, if 'protocol' includes
673 * some extension to a standard protocol version, the return value is the
674 * standard version of that protocol without any extension. If 'protocol' is a
675 * standard protocol version, returns 'protocol' unchanged. */
676 enum ofputil_protocol
677 ofputil_protocol_to_base(enum ofputil_protocol protocol)
679 return ofputil_protocol_set_tid(protocol, false);
682 /* Returns 'new_base' with any extensions taken from 'cur'. */
683 enum ofputil_protocol
684 ofputil_protocol_set_base(enum ofputil_protocol cur,
685 enum ofputil_protocol new_base)
687 bool tid = (cur & OFPUTIL_P_TID) != 0;
691 case OFPUTIL_P_OF10_TID:
692 return ofputil_protocol_set_tid(OFPUTIL_P_OF10, tid);
695 case OFPUTIL_P_NXM_TID:
696 return ofputil_protocol_set_tid(OFPUTIL_P_NXM, tid);
699 return ofputil_protocol_set_tid(OFPUTIL_P_OF12, tid);
706 /* Returns a string form of 'protocol', if a simple form exists (that is, if
707 * 'protocol' is either a single protocol or it is a combination of protocols
708 * that have a single abbreviation). Otherwise, returns NULL. */
710 ofputil_protocol_to_string(enum ofputil_protocol protocol)
712 const struct proto_abbrev *p;
714 /* Use a "switch" statement for single-bit names so that we get a compiler
715 * warning if we forget any. */
718 return "NXM-table_id";
720 case OFPUTIL_P_NXM_TID:
721 return "NXM+table_id";
724 return "OpenFlow10-table_id";
726 case OFPUTIL_P_OF10_TID:
727 return "OpenFlow10+table_id";
733 /* Check abbreviations. */
734 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
735 if (protocol == p->protocol) {
743 /* Returns a string that represents 'protocols'. The return value might be a
744 * comma-separated list if 'protocols' doesn't have a simple name. The return
745 * value is "none" if 'protocols' is 0.
747 * The caller must free the returned string (with free()). */
749 ofputil_protocols_to_string(enum ofputil_protocol protocols)
753 assert(!(protocols & ~OFPUTIL_P_ANY));
754 if (protocols == 0) {
755 return xstrdup("none");
760 const struct proto_abbrev *p;
764 ds_put_char(&s, ',');
767 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
768 if ((protocols & p->protocol) == p->protocol) {
769 ds_put_cstr(&s, p->name);
770 protocols &= ~p->protocol;
775 for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
776 enum ofputil_protocol bit = 1u << i;
778 if (protocols & bit) {
779 ds_put_cstr(&s, ofputil_protocol_to_string(bit));
788 return ds_steal_cstr(&s);
791 static enum ofputil_protocol
792 ofputil_protocol_from_string__(const char *s, size_t n)
794 const struct proto_abbrev *p;
797 for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
798 enum ofputil_protocol bit = 1u << i;
799 const char *name = ofputil_protocol_to_string(bit);
801 if (name && n == strlen(name) && !strncasecmp(s, name, n)) {
806 for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
807 if (n == strlen(p->name) && !strncasecmp(s, p->name, n)) {
815 /* Returns the nonempty set of protocols represented by 's', which can be a
816 * single protocol name or abbreviation or a comma-separated list of them.
818 * Aborts the program with an error message if 's' is invalid. */
819 enum ofputil_protocol
820 ofputil_protocols_from_string(const char *s)
822 const char *orig_s = s;
823 enum ofputil_protocol protocols;
827 enum ofputil_protocol p;
836 p = ofputil_protocol_from_string__(s, n);
838 ovs_fatal(0, "%.*s: unknown flow protocol", (int) n, s);
846 ovs_fatal(0, "%s: no flow protocol specified", orig_s);
852 ofputil_packet_in_format_is_valid(enum nx_packet_in_format packet_in_format)
854 switch (packet_in_format) {
855 case NXPIF_OPENFLOW10:
864 ofputil_packet_in_format_to_string(enum nx_packet_in_format packet_in_format)
866 switch (packet_in_format) {
867 case NXPIF_OPENFLOW10:
877 ofputil_packet_in_format_from_string(const char *s)
879 return (!strcmp(s, "openflow10") ? NXPIF_OPENFLOW10
880 : !strcmp(s, "nxm") ? NXPIF_NXM
885 regs_fully_wildcarded(const struct flow_wildcards *wc)
889 for (i = 0; i < FLOW_N_REGS; i++) {
890 if (wc->reg_masks[i] != 0) {
897 /* Returns a bit-mask of ofputil_protocols that can be used for sending 'rule'
898 * to a switch (e.g. to add or remove a flow). Only NXM can handle tunnel IDs,
899 * registers, or fixing the Ethernet multicast bit. Otherwise, it's better to
900 * use OpenFlow 1.0 protocol for backward compatibility. */
901 enum ofputil_protocol
902 ofputil_usable_protocols(const struct cls_rule *rule)
904 const struct flow_wildcards *wc = &rule->wc;
906 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
908 /* NXM and OF1.1+ supports bitwise matching on ethernet addresses. */
909 if (!eth_mask_is_exact(wc->dl_src_mask)
910 && !eth_addr_is_zero(wc->dl_src_mask)) {
911 return OFPUTIL_P_NXM_ANY;
913 if (!eth_mask_is_exact(wc->dl_dst_mask)
914 && !eth_addr_is_zero(wc->dl_dst_mask)) {
915 return OFPUTIL_P_NXM_ANY;
918 /* NXM and OF1.1+ support matching metadata. */
919 if (wc->metadata_mask != htonll(0)) {
920 return OFPUTIL_P_NXM_ANY;
923 /* Only NXM supports matching ARP hardware addresses. */
924 if (!eth_addr_is_zero(wc->arp_sha_mask) ||
925 !eth_addr_is_zero(wc->arp_tha_mask)) {
926 return OFPUTIL_P_NXM_ANY;
929 /* Only NXM supports matching IPv6 traffic. */
930 if (rule->flow.dl_type == htons(ETH_TYPE_IPV6)) {
931 return OFPUTIL_P_NXM_ANY;
934 /* Only NXM supports matching registers. */
935 if (!regs_fully_wildcarded(wc)) {
936 return OFPUTIL_P_NXM_ANY;
939 /* Only NXM supports matching tun_id. */
940 if (wc->tun_id_mask != htonll(0)) {
941 return OFPUTIL_P_NXM_ANY;
944 /* Only NXM supports matching fragments. */
945 if (wc->nw_frag_mask) {
946 return OFPUTIL_P_NXM_ANY;
949 /* Only NXM supports matching IPv6 flow label. */
950 if (wc->ipv6_label_mask) {
951 return OFPUTIL_P_NXM_ANY;
954 /* Only NXM supports matching IP ECN bits. */
955 if (wc->nw_tos_mask & IP_ECN_MASK) {
956 return OFPUTIL_P_NXM_ANY;
959 /* Only NXM supports matching IP TTL/hop limit. */
960 if (wc->nw_ttl_mask) {
961 return OFPUTIL_P_NXM_ANY;
964 /* Only NXM supports non-CIDR IPv4 address masks. */
965 if (!ip_is_cidr(wc->nw_src_mask) || !ip_is_cidr(wc->nw_dst_mask)) {
966 return OFPUTIL_P_NXM_ANY;
969 /* Only NXM supports bitwise matching on transport port. */
970 if ((wc->tp_src_mask && wc->tp_src_mask != htons(UINT16_MAX)) ||
971 (wc->tp_dst_mask && wc->tp_dst_mask != htons(UINT16_MAX))) {
972 return OFPUTIL_P_NXM_ANY;
975 /* Other formats can express this rule. */
976 return OFPUTIL_P_ANY;
979 /* Returns an OpenFlow message that, sent on an OpenFlow connection whose
980 * protocol is 'current', at least partly transitions the protocol to 'want'.
981 * Stores in '*next' the protocol that will be in effect on the OpenFlow
982 * connection if the switch processes the returned message correctly. (If
983 * '*next != want' then the caller will have to iterate.)
985 * If 'current == want', returns NULL and stores 'current' in '*next'. */
987 ofputil_encode_set_protocol(enum ofputil_protocol current,
988 enum ofputil_protocol want,
989 enum ofputil_protocol *next)
991 enum ofputil_protocol cur_base, want_base;
992 bool cur_tid, want_tid;
994 cur_base = ofputil_protocol_to_base(current);
995 want_base = ofputil_protocol_to_base(want);
996 if (cur_base != want_base) {
997 *next = ofputil_protocol_set_base(current, want_base);
1001 return ofputil_encode_nx_set_flow_format(NXFF_NXM);
1003 case OFPUTIL_P_OF10:
1004 return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW10);
1006 case OFPUTIL_P_OF12:
1007 return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW12);
1009 case OFPUTIL_P_OF10_TID:
1010 case OFPUTIL_P_NXM_TID:
1015 cur_tid = (current & OFPUTIL_P_TID) != 0;
1016 want_tid = (want & OFPUTIL_P_TID) != 0;
1017 if (cur_tid != want_tid) {
1018 *next = ofputil_protocol_set_tid(current, want_tid);
1019 return ofputil_make_flow_mod_table_id(want_tid);
1022 assert(current == want);
1028 /* Returns an NXT_SET_FLOW_FORMAT message that can be used to set the flow
1029 * format to 'nxff'. */
1031 ofputil_encode_nx_set_flow_format(enum nx_flow_format nxff)
1033 struct nx_set_flow_format *sff;
1036 assert(ofputil_nx_flow_format_is_valid(nxff));
1038 msg = ofpraw_alloc(OFPRAW_NXT_SET_FLOW_FORMAT, OFP10_VERSION, 0);
1039 sff = ofpbuf_put_zeros(msg, sizeof *sff);
1040 sff->format = htonl(nxff);
1045 /* Returns the base protocol if 'flow_format' is a valid NXFF_* value, false
1047 enum ofputil_protocol
1048 ofputil_nx_flow_format_to_protocol(enum nx_flow_format flow_format)
1050 switch (flow_format) {
1051 case NXFF_OPENFLOW10:
1052 return OFPUTIL_P_OF10;
1055 return OFPUTIL_P_NXM;
1057 case NXFF_OPENFLOW12:
1058 return OFPUTIL_P_OF12;
1065 /* Returns true if 'flow_format' is a valid NXFF_* value, false otherwise. */
1067 ofputil_nx_flow_format_is_valid(enum nx_flow_format flow_format)
1069 return ofputil_nx_flow_format_to_protocol(flow_format) != 0;
1072 /* Returns a string version of 'flow_format', which must be a valid NXFF_*
1075 ofputil_nx_flow_format_to_string(enum nx_flow_format flow_format)
1077 switch (flow_format) {
1078 case NXFF_OPENFLOW10:
1079 return "openflow10";
1082 case NXFF_OPENFLOW12:
1083 return "openflow12";
1090 ofputil_make_set_packet_in_format(enum nx_packet_in_format packet_in_format)
1092 struct nx_set_packet_in_format *spif;
1095 msg = ofpraw_alloc(OFPRAW_NXT_SET_PACKET_IN_FORMAT, OFP10_VERSION, 0);
1096 spif = ofpbuf_put_zeros(msg, sizeof *spif);
1097 spif->format = htonl(packet_in_format);
1102 /* Returns an OpenFlow message that can be used to turn the flow_mod_table_id
1103 * extension on or off (according to 'flow_mod_table_id'). */
1105 ofputil_make_flow_mod_table_id(bool flow_mod_table_id)
1107 struct nx_flow_mod_table_id *nfmti;
1110 msg = ofpraw_alloc(OFPRAW_NXT_FLOW_MOD_TABLE_ID, OFP10_VERSION, 0);
1111 nfmti = ofpbuf_put_zeros(msg, sizeof *nfmti);
1112 nfmti->set = flow_mod_table_id;
1116 /* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract
1117 * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error
1120 * Uses 'ofpacts' to store the abstract OFPACT_* version of 'oh''s actions.
1121 * The caller must initialize 'ofpacts' and retains ownership of it.
1122 * 'fm->ofpacts' will point into the 'ofpacts' buffer.
1124 * Does not validate the flow_mod actions. The caller should do that, with
1125 * ofpacts_check(). */
1127 ofputil_decode_flow_mod(struct ofputil_flow_mod *fm,
1128 const struct ofp_header *oh,
1129 enum ofputil_protocol protocol,
1130 struct ofpbuf *ofpacts)
1136 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1137 raw = ofpraw_pull_assert(&b);
1138 if (raw == OFPRAW_OFPT11_FLOW_MOD) {
1139 /* Standard OpenFlow 1.1 flow_mod. */
1140 const struct ofp11_flow_mod *ofm;
1143 ofm = ofpbuf_pull(&b, sizeof *ofm);
1145 error = ofputil_pull_ofp11_match(&b, ntohs(ofm->priority), &fm->cr,
1151 error = ofpacts_pull_openflow11_instructions(&b, b.size, ofpacts);
1156 /* Translate the message. */
1157 if (ofm->command == OFPFC_ADD) {
1158 fm->cookie = htonll(0);
1159 fm->cookie_mask = htonll(0);
1160 fm->new_cookie = ofm->cookie;
1163 fm->cookie = ofm->cookie;
1164 fm->cookie_mask = ofm->cookie_mask;
1165 fm->new_cookie = htonll(UINT64_MAX);
1167 fm->command = ofm->command;
1168 fm->table_id = ofm->table_id;
1169 fm->idle_timeout = ntohs(ofm->idle_timeout);
1170 fm->hard_timeout = ntohs(ofm->hard_timeout);
1171 fm->buffer_id = ntohl(ofm->buffer_id);
1172 error = ofputil_port_from_ofp11(ofm->out_port, &fm->out_port);
1176 if (ofm->out_group != htonl(OFPG_ANY)) {
1177 return OFPERR_NXFMFC_GROUPS_NOT_SUPPORTED;
1179 fm->flags = ntohs(ofm->flags);
1181 if (raw == OFPRAW_OFPT10_FLOW_MOD) {
1182 /* Standard OpenFlow 1.0 flow_mod. */
1183 const struct ofp10_flow_mod *ofm;
1187 /* Get the ofp10_flow_mod. */
1188 ofm = ofpbuf_pull(&b, sizeof *ofm);
1190 /* Set priority based on original wildcards. Normally we'd allow
1191 * ofputil_cls_rule_from_match() to do this for us, but
1192 * ofputil_normalize_rule() can put wildcards where the original
1193 * flow didn't have them. */
1194 priority = ntohs(ofm->priority);
1195 if (!(ofm->match.wildcards & htonl(OFPFW10_ALL))) {
1196 priority = UINT16_MAX;
1199 /* Translate the rule. */
1200 ofputil_cls_rule_from_ofp10_match(&ofm->match, priority, &fm->cr);
1201 ofputil_normalize_rule(&fm->cr);
1203 /* Now get the actions. */
1204 error = ofpacts_pull_openflow10(&b, b.size, ofpacts);
1209 /* Translate the message. */
1210 command = ntohs(ofm->command);
1211 fm->cookie = htonll(0);
1212 fm->cookie_mask = htonll(0);
1213 fm->new_cookie = ofm->cookie;
1214 fm->idle_timeout = ntohs(ofm->idle_timeout);
1215 fm->hard_timeout = ntohs(ofm->hard_timeout);
1216 fm->buffer_id = ntohl(ofm->buffer_id);
1217 fm->out_port = ntohs(ofm->out_port);
1218 fm->flags = ntohs(ofm->flags);
1219 } else if (raw == OFPRAW_NXT_FLOW_MOD) {
1220 /* Nicira extended flow_mod. */
1221 const struct nx_flow_mod *nfm;
1224 /* Dissect the message. */
1225 nfm = ofpbuf_pull(&b, sizeof *nfm);
1226 error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority),
1227 &fm->cr, &fm->cookie, &fm->cookie_mask);
1231 error = ofpacts_pull_openflow10(&b, b.size, ofpacts);
1236 /* Translate the message. */
1237 command = ntohs(nfm->command);
1238 if ((command & 0xff) == OFPFC_ADD && fm->cookie_mask) {
1239 /* Flow additions may only set a new cookie, not match an
1240 * existing cookie. */
1241 return OFPERR_NXBRC_NXM_INVALID;
1243 fm->new_cookie = nfm->cookie;
1244 fm->idle_timeout = ntohs(nfm->idle_timeout);
1245 fm->hard_timeout = ntohs(nfm->hard_timeout);
1246 fm->buffer_id = ntohl(nfm->buffer_id);
1247 fm->out_port = ntohs(nfm->out_port);
1248 fm->flags = ntohs(nfm->flags);
1253 if (protocol & OFPUTIL_P_TID) {
1254 fm->command = command & 0xff;
1255 fm->table_id = command >> 8;
1257 fm->command = command;
1258 fm->table_id = 0xff;
1262 fm->ofpacts = ofpacts->data;
1263 fm->ofpacts_len = ofpacts->size;
1269 ofputil_tid_command(const struct ofputil_flow_mod *fm,
1270 enum ofputil_protocol protocol)
1272 return htons(protocol & OFPUTIL_P_TID
1273 ? (fm->command & 0xff) | (fm->table_id << 8)
1277 /* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to
1278 * 'protocol' and returns the message. */
1280 ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm,
1281 enum ofputil_protocol protocol)
1286 case OFPUTIL_P_OF12: {
1287 struct ofp11_flow_mod *ofm;
1289 msg = ofpraw_alloc(OFPRAW_OFPT11_FLOW_MOD, OFP12_VERSION,
1290 NXM_TYPICAL_LEN + fm->ofpacts_len);
1291 ofm = ofpbuf_put_zeros(msg, sizeof *ofm);
1292 ofm->cookie = fm->new_cookie;
1293 ofm->cookie_mask = fm->cookie_mask;
1294 ofm->table_id = fm->table_id;
1295 ofm->command = fm->command;
1296 ofm->idle_timeout = htons(fm->idle_timeout);
1297 ofm->hard_timeout = htons(fm->hard_timeout);
1298 ofm->priority = htons(fm->cr.priority);
1299 ofm->buffer_id = htonl(fm->buffer_id);
1300 ofm->out_port = ofputil_port_to_ofp11(fm->out_port);
1301 ofm->out_group = htonl(OFPG11_ANY);
1302 ofm->flags = htons(fm->flags);
1303 oxm_put_match(msg, &fm->cr);
1304 ofpacts_put_openflow11_instructions(fm->ofpacts, fm->ofpacts_len, msg);
1308 case OFPUTIL_P_OF10:
1309 case OFPUTIL_P_OF10_TID: {
1310 struct ofp10_flow_mod *ofm;
1312 msg = ofpraw_alloc(OFPRAW_OFPT10_FLOW_MOD, OFP10_VERSION,
1314 ofm = ofpbuf_put_zeros(msg, sizeof *ofm);
1315 ofputil_cls_rule_to_ofp10_match(&fm->cr, &ofm->match);
1316 ofm->cookie = fm->new_cookie;
1317 ofm->command = ofputil_tid_command(fm, protocol);
1318 ofm->idle_timeout = htons(fm->idle_timeout);
1319 ofm->hard_timeout = htons(fm->hard_timeout);
1320 ofm->priority = htons(fm->cr.priority);
1321 ofm->buffer_id = htonl(fm->buffer_id);
1322 ofm->out_port = htons(fm->out_port);
1323 ofm->flags = htons(fm->flags);
1324 ofpacts_put_openflow10(fm->ofpacts, fm->ofpacts_len, msg);
1329 case OFPUTIL_P_NXM_TID: {
1330 struct nx_flow_mod *nfm;
1333 msg = ofpraw_alloc(OFPRAW_NXT_FLOW_MOD, OFP10_VERSION,
1334 NXM_TYPICAL_LEN + fm->ofpacts_len);
1335 nfm = ofpbuf_put_zeros(msg, sizeof *nfm);
1336 nfm->command = ofputil_tid_command(fm, protocol);
1337 nfm->cookie = fm->new_cookie;
1338 match_len = nx_put_match(msg, &fm->cr, fm->cookie, fm->cookie_mask);
1340 nfm->idle_timeout = htons(fm->idle_timeout);
1341 nfm->hard_timeout = htons(fm->hard_timeout);
1342 nfm->priority = htons(fm->cr.priority);
1343 nfm->buffer_id = htonl(fm->buffer_id);
1344 nfm->out_port = htons(fm->out_port);
1345 nfm->flags = htons(fm->flags);
1346 nfm->match_len = htons(match_len);
1347 ofpacts_put_openflow10(fm->ofpacts, fm->ofpacts_len, msg);
1355 ofpmsg_update_length(msg);
1359 /* Returns a bitmask with a 1-bit for each protocol that could be used to
1360 * send all of the 'n_fm's flow table modification requests in 'fms', and a
1361 * 0-bit for each protocol that is inadequate.
1363 * (The return value will have at least one 1-bit.) */
1364 enum ofputil_protocol
1365 ofputil_flow_mod_usable_protocols(const struct ofputil_flow_mod *fms,
1368 enum ofputil_protocol usable_protocols;
1371 usable_protocols = OFPUTIL_P_ANY;
1372 for (i = 0; i < n_fms; i++) {
1373 const struct ofputil_flow_mod *fm = &fms[i];
1375 usable_protocols &= ofputil_usable_protocols(&fm->cr);
1376 if (fm->table_id != 0xff) {
1377 usable_protocols &= OFPUTIL_P_TID;
1380 /* Matching of the cookie is only supported through NXM. */
1381 if (fm->cookie_mask != htonll(0)) {
1382 usable_protocols &= OFPUTIL_P_NXM_ANY;
1385 assert(usable_protocols);
1387 return usable_protocols;
1391 ofputil_decode_ofpst10_flow_request(struct ofputil_flow_stats_request *fsr,
1392 const struct ofp10_flow_stats_request *ofsr,
1395 fsr->aggregate = aggregate;
1396 ofputil_cls_rule_from_ofp10_match(&ofsr->match, 0, &fsr->match);
1397 fsr->out_port = ntohs(ofsr->out_port);
1398 fsr->table_id = ofsr->table_id;
1399 fsr->cookie = fsr->cookie_mask = htonll(0);
1405 ofputil_decode_ofpst11_flow_request(struct ofputil_flow_stats_request *fsr,
1406 struct ofpbuf *b, bool aggregate)
1408 const struct ofp11_flow_stats_request *ofsr;
1411 ofsr = ofpbuf_pull(b, sizeof *ofsr);
1412 fsr->aggregate = aggregate;
1413 fsr->table_id = ofsr->table_id;
1414 error = ofputil_port_from_ofp11(ofsr->out_port, &fsr->out_port);
1418 if (ofsr->out_group != htonl(OFPG11_ANY)) {
1419 return OFPERR_NXFMFC_GROUPS_NOT_SUPPORTED;
1421 fsr->cookie = ofsr->cookie;
1422 fsr->cookie_mask = ofsr->cookie_mask;
1423 error = ofputil_pull_ofp11_match(b, 0, &fsr->match, NULL);
1432 ofputil_decode_nxst_flow_request(struct ofputil_flow_stats_request *fsr,
1433 struct ofpbuf *b, bool aggregate)
1435 const struct nx_flow_stats_request *nfsr;
1438 nfsr = ofpbuf_pull(b, sizeof *nfsr);
1439 error = nx_pull_match(b, ntohs(nfsr->match_len), 0, &fsr->match,
1440 &fsr->cookie, &fsr->cookie_mask);
1445 return OFPERR_OFPBRC_BAD_LEN;
1448 fsr->aggregate = aggregate;
1449 fsr->out_port = ntohs(nfsr->out_port);
1450 fsr->table_id = nfsr->table_id;
1455 /* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE
1456 * request 'oh', into an abstract flow_stats_request in 'fsr'. Returns 0 if
1457 * successful, otherwise an OpenFlow error code. */
1459 ofputil_decode_flow_stats_request(struct ofputil_flow_stats_request *fsr,
1460 const struct ofp_header *oh)
1465 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1466 raw = ofpraw_pull_assert(&b);
1467 switch ((int) raw) {
1468 case OFPRAW_OFPST10_FLOW_REQUEST:
1469 return ofputil_decode_ofpst10_flow_request(fsr, b.data, false);
1471 case OFPRAW_OFPST10_AGGREGATE_REQUEST:
1472 return ofputil_decode_ofpst10_flow_request(fsr, b.data, true);
1474 case OFPRAW_OFPST11_FLOW_REQUEST:
1475 return ofputil_decode_ofpst11_flow_request(fsr, &b, false);
1477 case OFPRAW_OFPST11_AGGREGATE_REQUEST:
1478 return ofputil_decode_ofpst11_flow_request(fsr, &b, true);
1480 case OFPRAW_NXST_FLOW_REQUEST:
1481 return ofputil_decode_nxst_flow_request(fsr, &b, false);
1483 case OFPRAW_NXST_AGGREGATE_REQUEST:
1484 return ofputil_decode_nxst_flow_request(fsr, &b, true);
1487 /* Hey, the caller lied. */
1492 /* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW,
1493 * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to
1494 * 'protocol', and returns the message. */
1496 ofputil_encode_flow_stats_request(const struct ofputil_flow_stats_request *fsr,
1497 enum ofputil_protocol protocol)
1503 case OFPUTIL_P_OF12: {
1504 struct ofp11_flow_stats_request *ofsr;
1506 raw = (fsr->aggregate
1507 ? OFPRAW_OFPST11_AGGREGATE_REQUEST
1508 : OFPRAW_OFPST11_FLOW_REQUEST);
1509 msg = ofpraw_alloc(raw, OFP12_VERSION, NXM_TYPICAL_LEN);
1510 ofsr = ofpbuf_put_zeros(msg, sizeof *ofsr);
1511 ofsr->table_id = fsr->table_id;
1512 ofsr->out_port = ofputil_port_to_ofp11(fsr->out_port);
1513 ofsr->out_group = htonl(OFPG11_ANY);
1514 ofsr->cookie = fsr->cookie;
1515 ofsr->cookie_mask = fsr->cookie_mask;
1516 oxm_put_match(msg, &fsr->match);
1520 case OFPUTIL_P_OF10:
1521 case OFPUTIL_P_OF10_TID: {
1522 struct ofp10_flow_stats_request *ofsr;
1524 raw = (fsr->aggregate
1525 ? OFPRAW_OFPST10_AGGREGATE_REQUEST
1526 : OFPRAW_OFPST10_FLOW_REQUEST);
1527 msg = ofpraw_alloc(raw, OFP10_VERSION, 0);
1528 ofsr = ofpbuf_put_zeros(msg, sizeof *ofsr);
1529 ofputil_cls_rule_to_ofp10_match(&fsr->match, &ofsr->match);
1530 ofsr->table_id = fsr->table_id;
1531 ofsr->out_port = htons(fsr->out_port);
1536 case OFPUTIL_P_NXM_TID: {
1537 struct nx_flow_stats_request *nfsr;
1540 raw = (fsr->aggregate
1541 ? OFPRAW_NXST_AGGREGATE_REQUEST
1542 : OFPRAW_NXST_FLOW_REQUEST);
1543 msg = ofpraw_alloc(raw, OFP10_VERSION, NXM_TYPICAL_LEN);
1544 ofpbuf_put_zeros(msg, sizeof *nfsr);
1545 match_len = nx_put_match(msg, &fsr->match,
1546 fsr->cookie, fsr->cookie_mask);
1549 nfsr->out_port = htons(fsr->out_port);
1550 nfsr->match_len = htons(match_len);
1551 nfsr->table_id = fsr->table_id;
1562 /* Returns a bitmask with a 1-bit for each protocol that could be used to
1563 * accurately encode 'fsr', and a 0-bit for each protocol that is inadequate.
1565 * (The return value will have at least one 1-bit.) */
1566 enum ofputil_protocol
1567 ofputil_flow_stats_request_usable_protocols(
1568 const struct ofputil_flow_stats_request *fsr)
1570 enum ofputil_protocol usable_protocols;
1572 usable_protocols = ofputil_usable_protocols(&fsr->match);
1573 if (fsr->cookie_mask != htonll(0)) {
1574 usable_protocols &= OFPUTIL_P_NXM_ANY;
1576 return usable_protocols;
1579 /* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract
1580 * ofputil_flow_stats in 'fs'.
1582 * Multiple OFPST_FLOW or NXST_FLOW replies can be packed into a single
1583 * OpenFlow message. Calling this function multiple times for a single 'msg'
1584 * iterates through the replies. The caller must initially leave 'msg''s layer
1585 * pointers null and not modify them between calls.
1587 * Most switches don't send the values needed to populate fs->idle_age and
1588 * fs->hard_age, so those members will usually be set to 0. If the switch from
1589 * which 'msg' originated is known to implement NXT_FLOW_AGE, then pass
1590 * 'flow_age_extension' as true so that the contents of 'msg' determine the
1591 * 'idle_age' and 'hard_age' members in 'fs'.
1593 * Uses 'ofpacts' to store the abstract OFPACT_* version of the flow stats
1594 * reply's actions. The caller must initialize 'ofpacts' and retains ownership
1595 * of it. 'fs->ofpacts' will point into the 'ofpacts' buffer.
1597 * Returns 0 if successful, EOF if no replies were left in this 'msg',
1598 * otherwise a positive errno value. */
1600 ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs,
1602 bool flow_age_extension,
1603 struct ofpbuf *ofpacts)
1609 ? ofpraw_decode(&raw, msg->l2)
1610 : ofpraw_pull(&raw, msg));
1617 } else if (raw == OFPRAW_OFPST11_FLOW_REPLY) {
1618 const struct ofp11_flow_stats *ofs;
1620 uint16_t padded_match_len;
1622 ofs = ofpbuf_try_pull(msg, sizeof *ofs);
1624 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover "
1625 "bytes at end", msg->size);
1629 length = ntohs(ofs->length);
1630 if (length < sizeof *ofs) {
1631 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid "
1632 "length %zu", length);
1636 if (ofputil_pull_ofp11_match(msg, ntohs(ofs->priority), &fs->rule,
1637 &padded_match_len)) {
1638 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply bad match");
1642 if (ofpacts_pull_openflow11_instructions(msg, length - sizeof *ofs -
1643 padded_match_len, ofpacts)) {
1644 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply bad instructions");
1648 fs->table_id = ofs->table_id;
1649 fs->duration_sec = ntohl(ofs->duration_sec);
1650 fs->duration_nsec = ntohl(ofs->duration_nsec);
1651 fs->idle_timeout = ntohs(ofs->idle_timeout);
1652 fs->hard_timeout = ntohs(ofs->hard_timeout);
1655 fs->cookie = ofs->cookie;
1656 fs->packet_count = ntohll(ofs->packet_count);
1657 fs->byte_count = ntohll(ofs->byte_count);
1658 } else if (raw == OFPRAW_OFPST10_FLOW_REPLY) {
1659 const struct ofp10_flow_stats *ofs;
1662 ofs = ofpbuf_try_pull(msg, sizeof *ofs);
1664 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover "
1665 "bytes at end", msg->size);
1669 length = ntohs(ofs->length);
1670 if (length < sizeof *ofs) {
1671 VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid "
1672 "length %zu", length);
1676 if (ofpacts_pull_openflow10(msg, length - sizeof *ofs, ofpacts)) {
1680 fs->cookie = get_32aligned_be64(&ofs->cookie);
1681 ofputil_cls_rule_from_ofp10_match(&ofs->match, ntohs(ofs->priority),
1683 fs->table_id = ofs->table_id;
1684 fs->duration_sec = ntohl(ofs->duration_sec);
1685 fs->duration_nsec = ntohl(ofs->duration_nsec);
1686 fs->idle_timeout = ntohs(ofs->idle_timeout);
1687 fs->hard_timeout = ntohs(ofs->hard_timeout);
1690 fs->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count));
1691 fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count));
1692 } else if (raw == OFPRAW_NXST_FLOW_REPLY) {
1693 const struct nx_flow_stats *nfs;
1694 size_t match_len, actions_len, length;
1696 nfs = ofpbuf_try_pull(msg, sizeof *nfs);
1698 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply has %zu leftover "
1699 "bytes at end", msg->size);
1703 length = ntohs(nfs->length);
1704 match_len = ntohs(nfs->match_len);
1705 if (length < sizeof *nfs + ROUND_UP(match_len, 8)) {
1706 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply with match_len=%zu "
1707 "claims invalid length %zu", match_len, length);
1710 if (nx_pull_match(msg, match_len, ntohs(nfs->priority), &fs->rule,
1715 actions_len = length - sizeof *nfs - ROUND_UP(match_len, 8);
1716 if (ofpacts_pull_openflow10(msg, actions_len, ofpacts)) {
1720 fs->cookie = nfs->cookie;
1721 fs->table_id = nfs->table_id;
1722 fs->duration_sec = ntohl(nfs->duration_sec);
1723 fs->duration_nsec = ntohl(nfs->duration_nsec);
1724 fs->idle_timeout = ntohs(nfs->idle_timeout);
1725 fs->hard_timeout = ntohs(nfs->hard_timeout);
1728 if (flow_age_extension) {
1729 if (nfs->idle_age) {
1730 fs->idle_age = ntohs(nfs->idle_age) - 1;
1732 if (nfs->hard_age) {
1733 fs->hard_age = ntohs(nfs->hard_age) - 1;
1736 fs->packet_count = ntohll(nfs->packet_count);
1737 fs->byte_count = ntohll(nfs->byte_count);
1742 fs->ofpacts = ofpacts->data;
1743 fs->ofpacts_len = ofpacts->size;
1748 /* Returns 'count' unchanged except that UINT64_MAX becomes 0.
1750 * We use this in situations where OVS internally uses UINT64_MAX to mean
1751 * "value unknown" but OpenFlow 1.0 does not define any unknown value. */
1753 unknown_to_zero(uint64_t count)
1755 return count != UINT64_MAX ? count : 0;
1758 /* Appends an OFPST_FLOW or NXST_FLOW reply that contains the data in 'fs' to
1759 * those already present in the list of ofpbufs in 'replies'. 'replies' should
1760 * have been initialized with ofputil_start_stats_reply(). */
1762 ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *fs,
1763 struct list *replies)
1765 struct ofpbuf *reply = ofpbuf_from_list(list_back(replies));
1766 size_t start_ofs = reply->size;
1769 ofpraw_decode_partial(&raw, reply->data, reply->size);
1770 if (raw == OFPRAW_OFPST11_FLOW_REPLY) {
1771 struct ofp11_flow_stats *ofs;
1773 ofpbuf_put_uninit(reply, sizeof *ofs);
1774 oxm_put_match(reply, &fs->rule);
1775 ofpacts_put_openflow11_instructions(fs->ofpacts, fs->ofpacts_len,
1778 ofs = ofpbuf_at_assert(reply, start_ofs, sizeof *ofs);
1779 ofs->length = htons(reply->size - start_ofs);
1780 ofs->table_id = fs->table_id;
1782 ofs->duration_sec = htonl(fs->duration_sec);
1783 ofs->duration_nsec = htonl(fs->duration_nsec);
1784 ofs->priority = htons(fs->rule.priority);
1785 ofs->idle_timeout = htons(fs->idle_timeout);
1786 ofs->hard_timeout = htons(fs->hard_timeout);
1787 memset(ofs->pad2, 0, sizeof ofs->pad2);
1788 ofs->cookie = fs->cookie;
1789 ofs->packet_count = htonll(unknown_to_zero(fs->packet_count));
1790 ofs->byte_count = htonll(unknown_to_zero(fs->byte_count));
1791 } else if (raw == OFPRAW_OFPST10_FLOW_REPLY) {
1792 struct ofp10_flow_stats *ofs;
1794 ofpbuf_put_uninit(reply, sizeof *ofs);
1795 ofpacts_put_openflow10(fs->ofpacts, fs->ofpacts_len, reply);
1797 ofs = ofpbuf_at_assert(reply, start_ofs, sizeof *ofs);
1798 ofs->length = htons(reply->size - start_ofs);
1799 ofs->table_id = fs->table_id;
1801 ofputil_cls_rule_to_ofp10_match(&fs->rule, &ofs->match);
1802 ofs->duration_sec = htonl(fs->duration_sec);
1803 ofs->duration_nsec = htonl(fs->duration_nsec);
1804 ofs->priority = htons(fs->rule.priority);
1805 ofs->idle_timeout = htons(fs->idle_timeout);
1806 ofs->hard_timeout = htons(fs->hard_timeout);
1807 memset(ofs->pad2, 0, sizeof ofs->pad2);
1808 put_32aligned_be64(&ofs->cookie, fs->cookie);
1809 put_32aligned_be64(&ofs->packet_count,
1810 htonll(unknown_to_zero(fs->packet_count)));
1811 put_32aligned_be64(&ofs->byte_count,
1812 htonll(unknown_to_zero(fs->byte_count)));
1813 } else if (raw == OFPRAW_NXST_FLOW_REPLY) {
1814 struct nx_flow_stats *nfs;
1817 ofpbuf_put_uninit(reply, sizeof *nfs);
1818 match_len = nx_put_match(reply, &fs->rule, 0, 0);
1819 ofpacts_put_openflow10(fs->ofpacts, fs->ofpacts_len, reply);
1821 nfs = ofpbuf_at_assert(reply, start_ofs, sizeof *nfs);
1822 nfs->length = htons(reply->size - start_ofs);
1823 nfs->table_id = fs->table_id;
1825 nfs->duration_sec = htonl(fs->duration_sec);
1826 nfs->duration_nsec = htonl(fs->duration_nsec);
1827 nfs->priority = htons(fs->rule.priority);
1828 nfs->idle_timeout = htons(fs->idle_timeout);
1829 nfs->hard_timeout = htons(fs->hard_timeout);
1830 nfs->idle_age = htons(fs->idle_age < 0 ? 0
1831 : fs->idle_age < UINT16_MAX ? fs->idle_age + 1
1833 nfs->hard_age = htons(fs->hard_age < 0 ? 0
1834 : fs->hard_age < UINT16_MAX ? fs->hard_age + 1
1836 nfs->match_len = htons(match_len);
1837 nfs->cookie = fs->cookie;
1838 nfs->packet_count = htonll(fs->packet_count);
1839 nfs->byte_count = htonll(fs->byte_count);
1844 ofpmp_postappend(replies, start_ofs);
1847 /* Converts abstract ofputil_aggregate_stats 'stats' into an OFPST_AGGREGATE or
1848 * NXST_AGGREGATE reply matching 'request', and returns the message. */
1850 ofputil_encode_aggregate_stats_reply(
1851 const struct ofputil_aggregate_stats *stats,
1852 const struct ofp_header *request)
1854 struct ofp_aggregate_stats_reply *asr;
1855 uint64_t packet_count;
1856 uint64_t byte_count;
1860 ofpraw_decode(&raw, request);
1861 if (raw == OFPRAW_OFPST10_AGGREGATE_REQUEST) {
1862 packet_count = unknown_to_zero(stats->packet_count);
1863 byte_count = unknown_to_zero(stats->byte_count);
1865 packet_count = stats->packet_count;
1866 byte_count = stats->byte_count;
1869 msg = ofpraw_alloc_stats_reply(request, 0);
1870 asr = ofpbuf_put_zeros(msg, sizeof *asr);
1871 put_32aligned_be64(&asr->packet_count, htonll(packet_count));
1872 put_32aligned_be64(&asr->byte_count, htonll(byte_count));
1873 asr->flow_count = htonl(stats->flow_count);
1879 ofputil_decode_aggregate_stats_reply(struct ofputil_aggregate_stats *stats,
1880 const struct ofp_header *reply)
1882 struct ofp_aggregate_stats_reply *asr;
1885 ofpbuf_use_const(&msg, reply, ntohs(reply->length));
1886 ofpraw_pull_assert(&msg);
1889 stats->packet_count = ntohll(get_32aligned_be64(&asr->packet_count));
1890 stats->byte_count = ntohll(get_32aligned_be64(&asr->byte_count));
1891 stats->flow_count = ntohl(asr->flow_count);
1896 /* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh' into an
1897 * abstract ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise
1898 * an OpenFlow error code. */
1900 ofputil_decode_flow_removed(struct ofputil_flow_removed *fr,
1901 const struct ofp_header *oh)
1906 ofpbuf_use_const(&b, oh, ntohs(oh->length));
1907 raw = ofpraw_pull_assert(&b);
1908 if (raw == OFPRAW_OFPT11_FLOW_REMOVED) {
1909 const struct ofp12_flow_removed *ofr;
1912 ofr = ofpbuf_pull(&b, sizeof *ofr);
1914 error = ofputil_pull_ofp11_match(&b, ntohs(ofr->priority),
1920 fr->cookie = ofr->cookie;
1921 fr->reason = ofr->reason;
1922 /* XXX: ofr->table_id is ignored */
1923 fr->duration_sec = ntohl(ofr->duration_sec);
1924 fr->duration_nsec = ntohl(ofr->duration_nsec);
1925 fr->idle_timeout = ntohs(ofr->idle_timeout);
1926 fr->hard_timeout = ntohs(ofr->hard_timeout);
1927 fr->packet_count = ntohll(ofr->packet_count);
1928 fr->byte_count = ntohll(ofr->byte_count);
1929 } else if (raw == OFPRAW_OFPT10_FLOW_REMOVED) {
1930 const struct ofp_flow_removed *ofr;
1932 ofr = ofpbuf_pull(&b, sizeof *ofr);
1934 ofputil_cls_rule_from_ofp10_match(&ofr->match, ntohs(ofr->priority),
1936 fr->cookie = ofr->cookie;
1937 fr->reason = ofr->reason;
1938 fr->duration_sec = ntohl(ofr->duration_sec);
1939 fr->duration_nsec = ntohl(ofr->duration_nsec);
1940 fr->idle_timeout = ntohs(ofr->idle_timeout);
1941 fr->hard_timeout = 0;
1942 fr->packet_count = ntohll(ofr->packet_count);
1943 fr->byte_count = ntohll(ofr->byte_count);
1944 } else if (raw == OFPRAW_NXT_FLOW_REMOVED) {
1945 struct nx_flow_removed *nfr;
1948 nfr = ofpbuf_pull(&b, sizeof *nfr);
1949 error = nx_pull_match(&b, ntohs(nfr->match_len), ntohs(nfr->priority),
1950 &fr->rule, NULL, NULL);
1955 return OFPERR_OFPBRC_BAD_LEN;
1958 fr->cookie = nfr->cookie;
1959 fr->reason = nfr->reason;
1960 fr->duration_sec = ntohl(nfr->duration_sec);
1961 fr->duration_nsec = ntohl(nfr->duration_nsec);
1962 fr->idle_timeout = ntohs(nfr->idle_timeout);
1963 fr->hard_timeout = 0;
1964 fr->packet_count = ntohll(nfr->packet_count);
1965 fr->byte_count = ntohll(nfr->byte_count);
1973 /* Converts abstract ofputil_flow_removed 'fr' into an OFPT_FLOW_REMOVED or
1974 * NXT_FLOW_REMOVED message 'oh' according to 'protocol', and returns the
1977 ofputil_encode_flow_removed(const struct ofputil_flow_removed *fr,
1978 enum ofputil_protocol protocol)
1983 case OFPUTIL_P_OF12: {
1984 struct ofp12_flow_removed *ofr;
1986 msg = ofpraw_alloc_xid(OFPRAW_OFPT11_FLOW_REMOVED,
1987 ofputil_protocol_to_ofp_version(protocol),
1988 htonl(0), NXM_TYPICAL_LEN);
1989 ofr = ofpbuf_put_zeros(msg, sizeof *ofr);
1990 ofr->cookie = fr->cookie;
1991 ofr->priority = htons(fr->rule.priority);
1992 ofr->reason = fr->reason;
1994 ofr->duration_sec = htonl(fr->duration_sec);
1995 ofr->duration_nsec = htonl(fr->duration_nsec);
1996 ofr->idle_timeout = htons(fr->idle_timeout);
1997 ofr->hard_timeout = htons(fr->hard_timeout);
1998 ofr->packet_count = htonll(fr->packet_count);
1999 ofr->byte_count = htonll(fr->byte_count);
2000 oxm_put_match(msg, &fr->rule);
2004 case OFPUTIL_P_OF10:
2005 case OFPUTIL_P_OF10_TID: {
2006 struct ofp_flow_removed *ofr;
2008 msg = ofpraw_alloc_xid(OFPRAW_OFPT10_FLOW_REMOVED, OFP10_VERSION,
2010 ofr = ofpbuf_put_zeros(msg, sizeof *ofr);
2011 ofputil_cls_rule_to_ofp10_match(&fr->rule, &ofr->match);
2012 ofr->cookie = fr->cookie;
2013 ofr->priority = htons(fr->rule.priority);
2014 ofr->reason = fr->reason;
2015 ofr->duration_sec = htonl(fr->duration_sec);
2016 ofr->duration_nsec = htonl(fr->duration_nsec);
2017 ofr->idle_timeout = htons(fr->idle_timeout);
2018 ofr->packet_count = htonll(unknown_to_zero(fr->packet_count));
2019 ofr->byte_count = htonll(unknown_to_zero(fr->byte_count));
2024 case OFPUTIL_P_NXM_TID: {
2025 struct nx_flow_removed *nfr;
2028 msg = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_REMOVED, OFP10_VERSION,
2029 htonl(0), NXM_TYPICAL_LEN);
2030 nfr = ofpbuf_put_zeros(msg, sizeof *nfr);
2031 match_len = nx_put_match(msg, &fr->rule, 0, 0);
2034 nfr->cookie = fr->cookie;
2035 nfr->priority = htons(fr->rule.priority);
2036 nfr->reason = fr->reason;
2037 nfr->duration_sec = htonl(fr->duration_sec);
2038 nfr->duration_nsec = htonl(fr->duration_nsec);
2039 nfr->idle_timeout = htons(fr->idle_timeout);
2040 nfr->match_len = htons(match_len);
2041 nfr->packet_count = htonll(fr->packet_count);
2042 nfr->byte_count = htonll(fr->byte_count);
2054 ofputil_decode_packet_in_finish(struct ofputil_packet_in *pin,
2055 struct cls_rule *rule,
2058 pin->packet = b->data;
2059 pin->packet_len = b->size;
2061 pin->fmd.in_port = rule->flow.in_port;
2062 pin->fmd.tun_id = rule->flow.tun_id;
2063 pin->fmd.metadata = rule->flow.metadata;
2064 memcpy(pin->fmd.regs, rule->flow.regs, sizeof pin->fmd.regs);
2068 ofputil_decode_packet_in(struct ofputil_packet_in *pin,
2069 const struct ofp_header *oh)
2074 memset(pin, 0, sizeof *pin);
2076 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2077 raw = ofpraw_pull_assert(&b);
2078 if (raw == OFPRAW_OFPT12_PACKET_IN) {
2079 const struct ofp12_packet_in *opi;
2080 struct cls_rule rule;
2083 opi = ofpbuf_pull(&b, sizeof *opi);
2084 error = oxm_pull_match_loose(&b, 0, &rule);
2089 if (!ofpbuf_try_pull(&b, 2)) {
2090 return OFPERR_OFPBRC_BAD_LEN;
2093 pin->reason = opi->reason;
2094 pin->table_id = opi->table_id;
2096 pin->buffer_id = ntohl(opi->buffer_id);
2097 pin->total_len = ntohs(opi->total_len);
2099 ofputil_decode_packet_in_finish(pin, &rule, &b);
2100 } else if (raw == OFPRAW_OFPT10_PACKET_IN) {
2101 const struct ofp_packet_in *opi;
2103 opi = ofpbuf_pull(&b, offsetof(struct ofp_packet_in, data));
2105 pin->packet = opi->data;
2106 pin->packet_len = b.size;
2108 pin->fmd.in_port = ntohs(opi->in_port);
2109 pin->reason = opi->reason;
2110 pin->buffer_id = ntohl(opi->buffer_id);
2111 pin->total_len = ntohs(opi->total_len);
2112 } else if (raw == OFPRAW_NXT_PACKET_IN) {
2113 const struct nx_packet_in *npi;
2114 struct cls_rule rule;
2117 npi = ofpbuf_pull(&b, sizeof *npi);
2118 error = nx_pull_match_loose(&b, ntohs(npi->match_len), 0, &rule, NULL,
2124 if (!ofpbuf_try_pull(&b, 2)) {
2125 return OFPERR_OFPBRC_BAD_LEN;
2128 pin->reason = npi->reason;
2129 pin->table_id = npi->table_id;
2130 pin->cookie = npi->cookie;
2132 pin->buffer_id = ntohl(npi->buffer_id);
2133 pin->total_len = ntohs(npi->total_len);
2135 ofputil_decode_packet_in_finish(pin, &rule, &b);
2144 ofputil_packet_in_to_rule(const struct ofputil_packet_in *pin,
2145 struct cls_rule *rule)
2149 cls_rule_init_catchall(rule, 0);
2150 if (pin->fmd.tun_id != htonll(0)) {
2151 cls_rule_set_tun_id(rule, pin->fmd.tun_id);
2153 if (pin->fmd.metadata != htonll(0)) {
2154 cls_rule_set_metadata(rule, pin->fmd.metadata);
2157 for (i = 0; i < FLOW_N_REGS; i++) {
2158 if (pin->fmd.regs[i]) {
2159 cls_rule_set_reg(rule, i, pin->fmd.regs[i]);
2163 cls_rule_set_in_port(rule, pin->fmd.in_port);
2166 /* Converts abstract ofputil_packet_in 'pin' into a PACKET_IN message
2167 * in the format specified by 'packet_in_format'. */
2169 ofputil_encode_packet_in(const struct ofputil_packet_in *pin,
2170 enum ofputil_protocol protocol,
2171 enum nx_packet_in_format packet_in_format)
2173 size_t send_len = MIN(pin->send_len, pin->packet_len);
2174 struct ofpbuf *packet;
2176 /* Add OFPT_PACKET_IN. */
2177 if (protocol == OFPUTIL_P_OF12) {
2178 struct ofp12_packet_in *opi;
2179 struct cls_rule rule;
2181 ofputil_packet_in_to_rule(pin, &rule);
2183 /* The final argument is just an estimate of the space required. */
2184 packet = ofpraw_alloc_xid(OFPRAW_OFPT12_PACKET_IN, OFP12_VERSION,
2185 htonl(0), (sizeof(struct flow_metadata) * 2
2187 ofpbuf_put_zeros(packet, sizeof *opi);
2188 oxm_put_match(packet, &rule);
2189 ofpbuf_put_zeros(packet, 2);
2190 ofpbuf_put(packet, pin->packet, send_len);
2193 opi->buffer_id = htonl(pin->buffer_id);
2194 opi->total_len = htons(pin->total_len);
2195 opi->reason = pin->reason;
2196 opi->table_id = pin->table_id;
2197 } else if (packet_in_format == NXPIF_OPENFLOW10) {
2198 struct ofp_packet_in *opi;
2200 packet = ofpraw_alloc_xid(OFPRAW_OFPT10_PACKET_IN, OFP10_VERSION,
2201 htonl(0), send_len);
2202 opi = ofpbuf_put_zeros(packet, offsetof(struct ofp_packet_in, data));
2203 opi->total_len = htons(pin->total_len);
2204 opi->in_port = htons(pin->fmd.in_port);
2205 opi->reason = pin->reason;
2206 opi->buffer_id = htonl(pin->buffer_id);
2208 ofpbuf_put(packet, pin->packet, send_len);
2209 } else if (packet_in_format == NXPIF_NXM) {
2210 struct nx_packet_in *npi;
2211 struct cls_rule rule;
2214 ofputil_packet_in_to_rule(pin, &rule);
2216 /* The final argument is just an estimate of the space required. */
2217 packet = ofpraw_alloc_xid(OFPRAW_NXT_PACKET_IN, OFP10_VERSION,
2218 htonl(0), (sizeof(struct flow_metadata) * 2
2220 ofpbuf_put_zeros(packet, sizeof *npi);
2221 match_len = nx_put_match(packet, &rule, 0, 0);
2222 ofpbuf_put_zeros(packet, 2);
2223 ofpbuf_put(packet, pin->packet, send_len);
2226 npi->buffer_id = htonl(pin->buffer_id);
2227 npi->total_len = htons(pin->total_len);
2228 npi->reason = pin->reason;
2229 npi->table_id = pin->table_id;
2230 npi->cookie = pin->cookie;
2231 npi->match_len = htons(match_len);
2235 ofpmsg_update_length(packet);
2241 ofputil_packet_in_reason_to_string(enum ofp_packet_in_reason reason)
2243 static char s[INT_STRLEN(int) + 1];
2250 case OFPR_INVALID_TTL:
2251 return "invalid_ttl";
2253 case OFPR_N_REASONS:
2255 sprintf(s, "%d", (int) reason);
2261 ofputil_packet_in_reason_from_string(const char *s,
2262 enum ofp_packet_in_reason *reason)
2266 for (i = 0; i < OFPR_N_REASONS; i++) {
2267 if (!strcasecmp(s, ofputil_packet_in_reason_to_string(i))) {
2275 /* Converts an OFPT_PACKET_OUT in 'opo' into an abstract ofputil_packet_out in
2278 * Uses 'ofpacts' to store the abstract OFPACT_* version of the packet out
2279 * message's actions. The caller must initialize 'ofpacts' and retains
2280 * ownership of it. 'po->ofpacts' will point into the 'ofpacts' buffer.
2282 * Returns 0 if successful, otherwise an OFPERR_* value. */
2284 ofputil_decode_packet_out(struct ofputil_packet_out *po,
2285 const struct ofp_header *oh,
2286 struct ofpbuf *ofpacts)
2288 enum ofperr bad_in_port_err;
2292 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2293 raw = ofpraw_pull_assert(&b);
2295 if (raw == OFPRAW_OFPT11_PACKET_OUT) {
2297 const struct ofp11_packet_out *opo = ofpbuf_pull(&b, sizeof *opo);
2299 po->buffer_id = ntohl(opo->buffer_id);
2300 error = ofputil_port_from_ofp11(opo->in_port, &po->in_port);
2305 error = ofpacts_pull_openflow11_actions(&b, ntohs(opo->actions_len),
2311 bad_in_port_err = OFPERR_OFPBMC_BAD_VALUE;
2312 } else if (raw == OFPRAW_OFPT10_PACKET_OUT) {
2314 const struct ofp_packet_out *opo = ofpbuf_pull(&b, sizeof *opo);
2316 po->buffer_id = ntohl(opo->buffer_id);
2317 po->in_port = ntohs(opo->in_port);
2319 error = ofpacts_pull_openflow10(&b, ntohs(opo->actions_len), ofpacts);
2324 bad_in_port_err = OFPERR_NXBRC_BAD_IN_PORT;
2329 if (po->in_port >= OFPP_MAX && po->in_port != OFPP_LOCAL
2330 && po->in_port != OFPP_NONE && po->in_port != OFPP_CONTROLLER) {
2331 VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out has bad input port %#"PRIx16,
2333 return bad_in_port_err;
2336 po->ofpacts = ofpacts->data;
2337 po->ofpacts_len = ofpacts->size;
2339 if (po->buffer_id == UINT32_MAX) {
2340 po->packet = b.data;
2341 po->packet_len = b.size;
2350 /* ofputil_phy_port */
2352 /* NETDEV_F_* to and from OFPPF_* and OFPPF10_*. */
2353 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
2354 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
2355 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
2356 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
2357 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
2358 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
2359 BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
2361 /* NETDEV_F_ bits 11...15 are OFPPF10_ bits 7...11: */
2362 BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == (OFPPF10_COPPER << 4));
2363 BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == (OFPPF10_FIBER << 4));
2364 BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == (OFPPF10_AUTONEG << 4));
2365 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == (OFPPF10_PAUSE << 4));
2366 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == (OFPPF10_PAUSE_ASYM << 4));
2368 static enum netdev_features
2369 netdev_port_features_from_ofp10(ovs_be32 ofp10_)
2371 uint32_t ofp10 = ntohl(ofp10_);
2372 return (ofp10 & 0x7f) | ((ofp10 & 0xf80) << 4);
2376 netdev_port_features_to_ofp10(enum netdev_features features)
2378 return htonl((features & 0x7f) | ((features & 0xf800) >> 4));
2381 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
2382 BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
2383 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
2384 BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
2385 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
2386 BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
2387 BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
2388 BUILD_ASSERT_DECL((int) NETDEV_F_40GB_FD == OFPPF11_40GB_FD); /* bit 7 */
2389 BUILD_ASSERT_DECL((int) NETDEV_F_100GB_FD == OFPPF11_100GB_FD); /* bit 8 */
2390 BUILD_ASSERT_DECL((int) NETDEV_F_1TB_FD == OFPPF11_1TB_FD); /* bit 9 */
2391 BUILD_ASSERT_DECL((int) NETDEV_F_OTHER == OFPPF11_OTHER); /* bit 10 */
2392 BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == OFPPF11_COPPER); /* bit 11 */
2393 BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == OFPPF11_FIBER); /* bit 12 */
2394 BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == OFPPF11_AUTONEG); /* bit 13 */
2395 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == OFPPF11_PAUSE); /* bit 14 */
2396 BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == OFPPF11_PAUSE_ASYM);/* bit 15 */
2398 static enum netdev_features
2399 netdev_port_features_from_ofp11(ovs_be32 ofp11)
2401 return ntohl(ofp11) & 0xffff;
2405 netdev_port_features_to_ofp11(enum netdev_features features)
2407 return htonl(features & 0xffff);
2411 ofputil_decode_ofp10_phy_port(struct ofputil_phy_port *pp,
2412 const struct ofp10_phy_port *opp)
2414 memset(pp, 0, sizeof *pp);
2416 pp->port_no = ntohs(opp->port_no);
2417 memcpy(pp->hw_addr, opp->hw_addr, OFP_ETH_ALEN);
2418 ovs_strlcpy(pp->name, opp->name, OFP_MAX_PORT_NAME_LEN);
2420 pp->config = ntohl(opp->config) & OFPPC10_ALL;
2421 pp->state = ntohl(opp->state) & OFPPS10_ALL;
2423 pp->curr = netdev_port_features_from_ofp10(opp->curr);
2424 pp->advertised = netdev_port_features_from_ofp10(opp->advertised);
2425 pp->supported = netdev_port_features_from_ofp10(opp->supported);
2426 pp->peer = netdev_port_features_from_ofp10(opp->peer);
2428 pp->curr_speed = netdev_features_to_bps(pp->curr) / 1000;
2429 pp->max_speed = netdev_features_to_bps(pp->supported) / 1000;
2435 ofputil_decode_ofp11_port(struct ofputil_phy_port *pp,
2436 const struct ofp11_port *op)
2440 memset(pp, 0, sizeof *pp);
2442 error = ofputil_port_from_ofp11(op->port_no, &pp->port_no);
2446 memcpy(pp->hw_addr, op->hw_addr, OFP_ETH_ALEN);
2447 ovs_strlcpy(pp->name, op->name, OFP_MAX_PORT_NAME_LEN);
2449 pp->config = ntohl(op->config) & OFPPC11_ALL;
2450 pp->state = ntohl(op->state) & OFPPC11_ALL;
2452 pp->curr = netdev_port_features_from_ofp11(op->curr);
2453 pp->advertised = netdev_port_features_from_ofp11(op->advertised);
2454 pp->supported = netdev_port_features_from_ofp11(op->supported);
2455 pp->peer = netdev_port_features_from_ofp11(op->peer);
2457 pp->curr_speed = ntohl(op->curr_speed);
2458 pp->max_speed = ntohl(op->max_speed);
2464 ofputil_get_phy_port_size(enum ofp_version ofp_version)
2466 switch (ofp_version) {
2468 return sizeof(struct ofp10_phy_port);
2471 return sizeof(struct ofp11_port);
2478 ofputil_encode_ofp10_phy_port(const struct ofputil_phy_port *pp,
2479 struct ofp10_phy_port *opp)
2481 memset(opp, 0, sizeof *opp);
2483 opp->port_no = htons(pp->port_no);
2484 memcpy(opp->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
2485 ovs_strlcpy(opp->name, pp->name, OFP_MAX_PORT_NAME_LEN);
2487 opp->config = htonl(pp->config & OFPPC10_ALL);
2488 opp->state = htonl(pp->state & OFPPS10_ALL);
2490 opp->curr = netdev_port_features_to_ofp10(pp->curr);
2491 opp->advertised = netdev_port_features_to_ofp10(pp->advertised);
2492 opp->supported = netdev_port_features_to_ofp10(pp->supported);
2493 opp->peer = netdev_port_features_to_ofp10(pp->peer);
2497 ofputil_encode_ofp11_port(const struct ofputil_phy_port *pp,
2498 struct ofp11_port *op)
2500 memset(op, 0, sizeof *op);
2502 op->port_no = ofputil_port_to_ofp11(pp->port_no);
2503 memcpy(op->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
2504 ovs_strlcpy(op->name, pp->name, OFP_MAX_PORT_NAME_LEN);
2506 op->config = htonl(pp->config & OFPPC11_ALL);
2507 op->state = htonl(pp->state & OFPPS11_ALL);
2509 op->curr = netdev_port_features_to_ofp11(pp->curr);
2510 op->advertised = netdev_port_features_to_ofp11(pp->advertised);
2511 op->supported = netdev_port_features_to_ofp11(pp->supported);
2512 op->peer = netdev_port_features_to_ofp11(pp->peer);
2514 op->curr_speed = htonl(pp->curr_speed);
2515 op->max_speed = htonl(pp->max_speed);
2519 ofputil_put_phy_port(enum ofp_version ofp_version,
2520 const struct ofputil_phy_port *pp, struct ofpbuf *b)
2522 switch (ofp_version) {
2523 case OFP10_VERSION: {
2524 struct ofp10_phy_port *opp;
2525 if (b->size + sizeof *opp <= UINT16_MAX) {
2526 opp = ofpbuf_put_uninit(b, sizeof *opp);
2527 ofputil_encode_ofp10_phy_port(pp, opp);
2533 case OFP12_VERSION: {
2534 struct ofp11_port *op;
2535 if (b->size + sizeof *op <= UINT16_MAX) {
2536 op = ofpbuf_put_uninit(b, sizeof *op);
2537 ofputil_encode_ofp11_port(pp, op);
2548 ofputil_append_port_desc_stats_reply(enum ofp_version ofp_version,
2549 const struct ofputil_phy_port *pp,
2550 struct list *replies)
2552 switch (ofp_version) {
2553 case OFP10_VERSION: {
2554 struct ofp10_phy_port *opp;
2556 opp = ofpmp_append(replies, sizeof *opp);
2557 ofputil_encode_ofp10_phy_port(pp, opp);
2562 case OFP12_VERSION: {
2563 struct ofp11_port *op;
2565 op = ofpmp_append(replies, sizeof *op);
2566 ofputil_encode_ofp11_port(pp, op);
2575 /* ofputil_switch_features */
2577 #define OFPC_COMMON (OFPC_FLOW_STATS | OFPC_TABLE_STATS | OFPC_PORT_STATS | \
2578 OFPC_IP_REASM | OFPC_QUEUE_STATS)
2579 BUILD_ASSERT_DECL((int) OFPUTIL_C_FLOW_STATS == OFPC_FLOW_STATS);
2580 BUILD_ASSERT_DECL((int) OFPUTIL_C_TABLE_STATS == OFPC_TABLE_STATS);
2581 BUILD_ASSERT_DECL((int) OFPUTIL_C_PORT_STATS == OFPC_PORT_STATS);
2582 BUILD_ASSERT_DECL((int) OFPUTIL_C_IP_REASM == OFPC_IP_REASM);
2583 BUILD_ASSERT_DECL((int) OFPUTIL_C_QUEUE_STATS == OFPC_QUEUE_STATS);
2584 BUILD_ASSERT_DECL((int) OFPUTIL_C_ARP_MATCH_IP == OFPC_ARP_MATCH_IP);
2586 struct ofputil_action_bit_translation {
2587 enum ofputil_action_bitmap ofputil_bit;
2591 static const struct ofputil_action_bit_translation of10_action_bits[] = {
2592 { OFPUTIL_A_OUTPUT, OFPAT10_OUTPUT },
2593 { OFPUTIL_A_SET_VLAN_VID, OFPAT10_SET_VLAN_VID },
2594 { OFPUTIL_A_SET_VLAN_PCP, OFPAT10_SET_VLAN_PCP },
2595 { OFPUTIL_A_STRIP_VLAN, OFPAT10_STRIP_VLAN },
2596 { OFPUTIL_A_SET_DL_SRC, OFPAT10_SET_DL_SRC },
2597 { OFPUTIL_A_SET_DL_DST, OFPAT10_SET_DL_DST },
2598 { OFPUTIL_A_SET_NW_SRC, OFPAT10_SET_NW_SRC },
2599 { OFPUTIL_A_SET_NW_DST, OFPAT10_SET_NW_DST },
2600 { OFPUTIL_A_SET_NW_TOS, OFPAT10_SET_NW_TOS },
2601 { OFPUTIL_A_SET_TP_SRC, OFPAT10_SET_TP_SRC },
2602 { OFPUTIL_A_SET_TP_DST, OFPAT10_SET_TP_DST },
2603 { OFPUTIL_A_ENQUEUE, OFPAT10_ENQUEUE },
2607 static enum ofputil_action_bitmap
2608 decode_action_bits(ovs_be32 of_actions,
2609 const struct ofputil_action_bit_translation *x)
2611 enum ofputil_action_bitmap ofputil_actions;
2613 ofputil_actions = 0;
2614 for (; x->ofputil_bit; x++) {
2615 if (of_actions & htonl(1u << x->of_bit)) {
2616 ofputil_actions |= x->ofputil_bit;
2619 return ofputil_actions;
2623 ofputil_capabilities_mask(enum ofp_version ofp_version)
2625 /* Handle capabilities whose bit is unique for all Open Flow versions */
2626 switch (ofp_version) {
2629 return OFPC_COMMON | OFPC_ARP_MATCH_IP;
2631 return OFPC_COMMON | OFPC12_PORT_BLOCKED;
2633 /* Caller needs to check osf->header.version itself */
2638 /* Decodes an OpenFlow 1.0 or 1.1 "switch_features" structure 'osf' into an
2639 * abstract representation in '*features'. Initializes '*b' to iterate over
2640 * the OpenFlow port structures following 'osf' with later calls to
2641 * ofputil_pull_phy_port(). Returns 0 if successful, otherwise an
2642 * OFPERR_* value. */
2644 ofputil_decode_switch_features(const struct ofp_header *oh,
2645 struct ofputil_switch_features *features,
2648 const struct ofp_switch_features *osf;
2651 ofpbuf_use_const(b, oh, ntohs(oh->length));
2652 raw = ofpraw_pull_assert(b);
2654 osf = ofpbuf_pull(b, sizeof *osf);
2655 features->datapath_id = ntohll(osf->datapath_id);
2656 features->n_buffers = ntohl(osf->n_buffers);
2657 features->n_tables = osf->n_tables;
2659 features->capabilities = ntohl(osf->capabilities) &
2660 ofputil_capabilities_mask(oh->version);
2662 if (b->size % ofputil_get_phy_port_size(oh->version)) {
2663 return OFPERR_OFPBRC_BAD_LEN;
2666 if (raw == OFPRAW_OFPT10_FEATURES_REPLY) {
2667 if (osf->capabilities & htonl(OFPC10_STP)) {
2668 features->capabilities |= OFPUTIL_C_STP;
2670 features->actions = decode_action_bits(osf->actions, of10_action_bits);
2671 } else if (raw == OFPRAW_OFPT11_FEATURES_REPLY) {
2672 if (osf->capabilities & htonl(OFPC11_GROUP_STATS)) {
2673 features->capabilities |= OFPUTIL_C_GROUP_STATS;
2675 features->actions = 0;
2677 return OFPERR_OFPBRC_BAD_VERSION;
2683 /* Returns true if the maximum number of ports are in 'oh'. */
2685 max_ports_in_features(const struct ofp_header *oh)
2687 size_t pp_size = ofputil_get_phy_port_size(oh->version);
2688 return ntohs(oh->length) + pp_size > UINT16_MAX;
2691 /* Given a buffer 'b' that contains a Features Reply message, checks if
2692 * it contains the maximum number of ports that will fit. If so, it
2693 * returns true and removes the ports from the message. The caller
2694 * should then send an OFPST_PORT_DESC stats request to get the ports,
2695 * since the switch may have more ports than could be represented in the
2696 * Features Reply. Otherwise, returns false.
2699 ofputil_switch_features_ports_trunc(struct ofpbuf *b)
2701 struct ofp_header *oh = b->data;
2703 if (max_ports_in_features(oh)) {
2704 /* Remove all the ports. */
2705 b->size = (sizeof(struct ofp_header)
2706 + sizeof(struct ofp_switch_features));
2707 ofpmsg_update_length(b);
2716 encode_action_bits(enum ofputil_action_bitmap ofputil_actions,
2717 const struct ofputil_action_bit_translation *x)
2719 uint32_t of_actions;
2722 for (; x->ofputil_bit; x++) {
2723 if (ofputil_actions & x->ofputil_bit) {
2724 of_actions |= 1 << x->of_bit;
2727 return htonl(of_actions);
2730 /* Returns a buffer owned by the caller that encodes 'features' in the format
2731 * required by 'protocol' with the given 'xid'. The caller should append port
2732 * information to the buffer with subsequent calls to
2733 * ofputil_put_switch_features_port(). */
2735 ofputil_encode_switch_features(const struct ofputil_switch_features *features,
2736 enum ofputil_protocol protocol, ovs_be32 xid)
2738 struct ofp_switch_features *osf;
2740 enum ofp_version version;
2743 version = ofputil_protocol_to_ofp_version(protocol);
2746 raw = OFPRAW_OFPT10_FEATURES_REPLY;
2750 raw = OFPRAW_OFPT11_FEATURES_REPLY;
2755 b = ofpraw_alloc_xid(raw, version, xid, 0);
2756 osf = ofpbuf_put_zeros(b, sizeof *osf);
2757 osf->datapath_id = htonll(features->datapath_id);
2758 osf->n_buffers = htonl(features->n_buffers);
2759 osf->n_tables = features->n_tables;
2761 osf->capabilities = htonl(features->capabilities & OFPC_COMMON);
2762 osf->capabilities = htonl(features->capabilities &
2763 ofputil_capabilities_mask(version));
2766 if (features->capabilities & OFPUTIL_C_STP) {
2767 osf->capabilities |= htonl(OFPC10_STP);
2769 osf->actions = encode_action_bits(features->actions, of10_action_bits);
2773 if (features->capabilities & OFPUTIL_C_GROUP_STATS) {
2774 osf->capabilities |= htonl(OFPC11_GROUP_STATS);
2784 /* Encodes 'pp' into the format required by the switch_features message already
2785 * in 'b', which should have been returned by ofputil_encode_switch_features(),
2786 * and appends the encoded version to 'b'. */
2788 ofputil_put_switch_features_port(const struct ofputil_phy_port *pp,
2791 const struct ofp_header *oh = b->data;
2793 ofputil_put_phy_port(oh->version, pp, b);
2796 /* ofputil_port_status */
2798 /* Decodes the OpenFlow "port status" message in '*ops' into an abstract form
2799 * in '*ps'. Returns 0 if successful, otherwise an OFPERR_* value. */
2801 ofputil_decode_port_status(const struct ofp_header *oh,
2802 struct ofputil_port_status *ps)
2804 const struct ofp_port_status *ops;
2808 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2809 ofpraw_pull_assert(&b);
2810 ops = ofpbuf_pull(&b, sizeof *ops);
2812 if (ops->reason != OFPPR_ADD &&
2813 ops->reason != OFPPR_DELETE &&
2814 ops->reason != OFPPR_MODIFY) {
2815 return OFPERR_NXBRC_BAD_REASON;
2817 ps->reason = ops->reason;
2819 retval = ofputil_pull_phy_port(oh->version, &b, &ps->desc);
2820 assert(retval != EOF);
2824 /* Converts the abstract form of a "port status" message in '*ps' into an
2825 * OpenFlow message suitable for 'protocol', and returns that encoded form in
2826 * a buffer owned by the caller. */
2828 ofputil_encode_port_status(const struct ofputil_port_status *ps,
2829 enum ofputil_protocol protocol)
2831 struct ofp_port_status *ops;
2833 enum ofp_version version;
2836 version = ofputil_protocol_to_ofp_version(protocol);
2839 raw = OFPRAW_OFPT10_PORT_STATUS;
2844 raw = OFPRAW_OFPT11_PORT_STATUS;
2851 b = ofpraw_alloc_xid(raw, version, htonl(0), 0);
2852 ops = ofpbuf_put_zeros(b, sizeof *ops);
2853 ops->reason = ps->reason;
2854 ofputil_put_phy_port(version, &ps->desc, b);
2855 ofpmsg_update_length(b);
2859 /* ofputil_port_mod */
2861 /* Decodes the OpenFlow "port mod" message in '*oh' into an abstract form in
2862 * '*pm'. Returns 0 if successful, otherwise an OFPERR_* value. */
2864 ofputil_decode_port_mod(const struct ofp_header *oh,
2865 struct ofputil_port_mod *pm)
2870 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2871 raw = ofpraw_pull_assert(&b);
2873 if (raw == OFPRAW_OFPT10_PORT_MOD) {
2874 const struct ofp10_port_mod *opm = b.data;
2876 pm->port_no = ntohs(opm->port_no);
2877 memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
2878 pm->config = ntohl(opm->config) & OFPPC10_ALL;
2879 pm->mask = ntohl(opm->mask) & OFPPC10_ALL;
2880 pm->advertise = netdev_port_features_from_ofp10(opm->advertise);
2881 } else if (raw == OFPRAW_OFPT11_PORT_MOD) {
2882 const struct ofp11_port_mod *opm = b.data;
2885 error = ofputil_port_from_ofp11(opm->port_no, &pm->port_no);
2890 memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
2891 pm->config = ntohl(opm->config) & OFPPC11_ALL;
2892 pm->mask = ntohl(opm->mask) & OFPPC11_ALL;
2893 pm->advertise = netdev_port_features_from_ofp11(opm->advertise);
2895 return OFPERR_OFPBRC_BAD_TYPE;
2898 pm->config &= pm->mask;
2902 /* Converts the abstract form of a "port mod" message in '*pm' into an OpenFlow
2903 * message suitable for 'protocol', and returns that encoded form in a buffer
2904 * owned by the caller. */
2906 ofputil_encode_port_mod(const struct ofputil_port_mod *pm,
2907 enum ofputil_protocol protocol)
2909 enum ofp_version ofp_version = ofputil_protocol_to_ofp_version(protocol);
2912 switch (ofp_version) {
2913 case OFP10_VERSION: {
2914 struct ofp10_port_mod *opm;
2916 b = ofpraw_alloc(OFPRAW_OFPT10_PORT_MOD, ofp_version, 0);
2917 opm = ofpbuf_put_zeros(b, sizeof *opm);
2918 opm->port_no = htons(pm->port_no);
2919 memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
2920 opm->config = htonl(pm->config & OFPPC10_ALL);
2921 opm->mask = htonl(pm->mask & OFPPC10_ALL);
2922 opm->advertise = netdev_port_features_to_ofp10(pm->advertise);
2927 case OFP12_VERSION: {
2928 struct ofp11_port_mod *opm;
2930 b = ofpraw_alloc(OFPRAW_OFPT11_PORT_MOD, ofp_version, 0);
2931 opm = ofpbuf_put_zeros(b, sizeof *opm);
2932 opm->port_no = ofputil_port_to_ofp11(pm->port_no);
2933 memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
2934 opm->config = htonl(pm->config & OFPPC11_ALL);
2935 opm->mask = htonl(pm->mask & OFPPC11_ALL);
2936 opm->advertise = netdev_port_features_to_ofp11(pm->advertise);
2947 /* ofputil_flow_monitor_request */
2949 /* Converts an NXST_FLOW_MONITOR request in 'msg' into an abstract
2950 * ofputil_flow_monitor_request in 'rq'.
2952 * Multiple NXST_FLOW_MONITOR requests can be packed into a single OpenFlow
2953 * message. Calling this function multiple times for a single 'msg' iterates
2954 * through the requests. The caller must initially leave 'msg''s layer
2955 * pointers null and not modify them between calls.
2957 * Returns 0 if successful, EOF if no requests were left in this 'msg',
2958 * otherwise an OFPERR_* value. */
2960 ofputil_decode_flow_monitor_request(struct ofputil_flow_monitor_request *rq,
2963 struct nx_flow_monitor_request *nfmr;
2967 msg->l2 = msg->data;
2968 ofpraw_pull_assert(msg);
2975 nfmr = ofpbuf_try_pull(msg, sizeof *nfmr);
2977 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR request has %zu "
2978 "leftover bytes at end", msg->size);
2979 return OFPERR_OFPBRC_BAD_LEN;
2982 flags = ntohs(nfmr->flags);
2983 if (!(flags & (NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY))
2984 || flags & ~(NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE
2985 | NXFMF_MODIFY | NXFMF_ACTIONS | NXFMF_OWN)) {
2986 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR has bad flags %#"PRIx16,
2988 return OFPERR_NXBRC_FM_BAD_FLAGS;
2991 if (!is_all_zeros(nfmr->zeros, sizeof nfmr->zeros)) {
2992 return OFPERR_NXBRC_MUST_BE_ZERO;
2995 rq->id = ntohl(nfmr->id);
2997 rq->out_port = ntohs(nfmr->out_port);
2998 rq->table_id = nfmr->table_id;
3000 return nx_pull_match(msg, ntohs(nfmr->match_len), OFP_DEFAULT_PRIORITY,
3001 &rq->match, NULL, NULL);
3005 ofputil_append_flow_monitor_request(
3006 const struct ofputil_flow_monitor_request *rq, struct ofpbuf *msg)
3008 struct nx_flow_monitor_request *nfmr;
3013 ofpraw_put(OFPRAW_NXST_FLOW_MONITOR_REQUEST, OFP10_VERSION, msg);
3016 start_ofs = msg->size;
3017 ofpbuf_put_zeros(msg, sizeof *nfmr);
3018 match_len = nx_put_match(msg, &rq->match, htonll(0), htonll(0));
3020 nfmr = ofpbuf_at_assert(msg, start_ofs, sizeof *nfmr);
3021 nfmr->id = htonl(rq->id);
3022 nfmr->flags = htons(rq->flags);
3023 nfmr->out_port = htons(rq->out_port);
3024 nfmr->match_len = htons(match_len);
3025 nfmr->table_id = rq->table_id;
3028 /* Converts an NXST_FLOW_MONITOR reply (also known as a flow update) in 'msg'
3029 * into an abstract ofputil_flow_update in 'update'. The caller must have
3030 * initialized update->match to point to space allocated for a cls_rule.
3032 * Uses 'ofpacts' to store the abstract OFPACT_* version of the update's
3033 * actions (except for NXFME_ABBREV, which never includes actions). The caller
3034 * must initialize 'ofpacts' and retains ownership of it. 'update->ofpacts'
3035 * will point into the 'ofpacts' buffer.
3037 * Multiple flow updates can be packed into a single OpenFlow message. Calling
3038 * this function multiple times for a single 'msg' iterates through the
3039 * updates. The caller must initially leave 'msg''s layer pointers null and
3040 * not modify them between calls.
3042 * Returns 0 if successful, EOF if no updates were left in this 'msg',
3043 * otherwise an OFPERR_* value. */
3045 ofputil_decode_flow_update(struct ofputil_flow_update *update,
3046 struct ofpbuf *msg, struct ofpbuf *ofpacts)
3048 struct nx_flow_update_header *nfuh;
3049 unsigned int length;
3052 msg->l2 = msg->data;
3053 ofpraw_pull_assert(msg);
3060 if (msg->size < sizeof(struct nx_flow_update_header)) {
3065 update->event = ntohs(nfuh->event);
3066 length = ntohs(nfuh->length);
3067 if (length > msg->size || length % 8) {
3071 if (update->event == NXFME_ABBREV) {
3072 struct nx_flow_update_abbrev *nfua;
3074 if (length != sizeof *nfua) {
3078 nfua = ofpbuf_pull(msg, sizeof *nfua);
3079 update->xid = nfua->xid;
3081 } else if (update->event == NXFME_ADDED
3082 || update->event == NXFME_DELETED
3083 || update->event == NXFME_MODIFIED) {
3084 struct nx_flow_update_full *nfuf;
3085 unsigned int actions_len;
3086 unsigned int match_len;
3089 if (length < sizeof *nfuf) {
3093 nfuf = ofpbuf_pull(msg, sizeof *nfuf);
3094 match_len = ntohs(nfuf->match_len);
3095 if (sizeof *nfuf + match_len > length) {
3099 update->reason = ntohs(nfuf->reason);
3100 update->idle_timeout = ntohs(nfuf->idle_timeout);
3101 update->hard_timeout = ntohs(nfuf->hard_timeout);
3102 update->table_id = nfuf->table_id;
3103 update->cookie = nfuf->cookie;
3105 error = nx_pull_match(msg, match_len, ntohs(nfuf->priority),
3106 update->match, NULL, NULL);
3111 actions_len = length - sizeof *nfuf - ROUND_UP(match_len, 8);
3112 error = ofpacts_pull_openflow10(msg, actions_len, ofpacts);
3117 update->ofpacts = ofpacts->data;
3118 update->ofpacts_len = ofpacts->size;
3121 VLOG_WARN_RL(&bad_ofmsg_rl,
3122 "NXST_FLOW_MONITOR reply has bad event %"PRIu16,
3123 ntohs(nfuh->event));
3124 return OFPERR_OFPET_BAD_REQUEST;
3128 VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR reply has %zu "
3129 "leftover bytes at end", msg->size);
3130 return OFPERR_OFPBRC_BAD_LEN;
3134 ofputil_decode_flow_monitor_cancel(const struct ofp_header *oh)
3136 const struct nx_flow_monitor_cancel *cancel = ofpmsg_body(oh);
3138 return ntohl(cancel->id);
3142 ofputil_encode_flow_monitor_cancel(uint32_t id)
3144 struct nx_flow_monitor_cancel *nfmc;
3147 msg = ofpraw_alloc(OFPRAW_NXT_FLOW_MONITOR_CANCEL, OFP10_VERSION, 0);
3148 nfmc = ofpbuf_put_uninit(msg, sizeof *nfmc);
3149 nfmc->id = htonl(id);
3154 ofputil_start_flow_update(struct list *replies)
3158 msg = ofpraw_alloc_xid(OFPRAW_NXST_FLOW_MONITOR_REPLY, OFP10_VERSION,
3162 list_push_back(replies, &msg->list_node);
3166 ofputil_append_flow_update(const struct ofputil_flow_update *update,
3167 struct list *replies)
3169 struct nx_flow_update_header *nfuh;
3173 msg = ofpbuf_from_list(list_back(replies));
3174 start_ofs = msg->size;
3176 if (update->event == NXFME_ABBREV) {
3177 struct nx_flow_update_abbrev *nfua;
3179 nfua = ofpbuf_put_zeros(msg, sizeof *nfua);
3180 nfua->xid = update->xid;
3182 struct nx_flow_update_full *nfuf;
3185 ofpbuf_put_zeros(msg, sizeof *nfuf);
3186 match_len = nx_put_match(msg, update->match, htonll(0), htonll(0));
3187 ofpacts_put_openflow10(update->ofpacts, update->ofpacts_len, msg);
3189 nfuf = ofpbuf_at_assert(msg, start_ofs, sizeof *nfuf);
3190 nfuf->reason = htons(update->reason);
3191 nfuf->priority = htons(update->match->priority);
3192 nfuf->idle_timeout = htons(update->idle_timeout);
3193 nfuf->hard_timeout = htons(update->hard_timeout);
3194 nfuf->match_len = htons(match_len);
3195 nfuf->table_id = update->table_id;
3196 nfuf->cookie = update->cookie;
3199 nfuh = ofpbuf_at_assert(msg, start_ofs, sizeof *nfuh);
3200 nfuh->length = htons(msg->size - start_ofs);
3201 nfuh->event = htons(update->event);
3203 ofpmp_postappend(replies, start_ofs);
3207 ofputil_encode_packet_out(const struct ofputil_packet_out *po,
3208 enum ofputil_protocol protocol)
3210 enum ofp_version ofp_version = ofputil_protocol_to_ofp_version(protocol);
3214 size = po->ofpacts_len;
3215 if (po->buffer_id == UINT32_MAX) {
3216 size += po->packet_len;
3219 switch (ofp_version) {
3220 case OFP10_VERSION: {
3221 struct ofp_packet_out *opo;
3224 msg = ofpraw_alloc(OFPRAW_OFPT10_PACKET_OUT, OFP10_VERSION, size);
3225 ofpbuf_put_zeros(msg, sizeof *opo);
3226 actions_ofs = msg->size;
3227 ofpacts_put_openflow10(po->ofpacts, po->ofpacts_len, msg);
3230 opo->buffer_id = htonl(po->buffer_id);
3231 opo->in_port = htons(po->in_port);
3232 opo->actions_len = htons(msg->size - actions_ofs);
3237 case OFP12_VERSION: {
3238 struct ofp11_packet_out *opo;
3241 msg = ofpraw_alloc(OFPRAW_OFPT11_PACKET_OUT, ofp_version, size);
3242 ofpbuf_put_zeros(msg, sizeof *opo);
3243 len = ofpacts_put_openflow11_actions(po->ofpacts, po->ofpacts_len, msg);
3246 opo->buffer_id = htonl(po->buffer_id);
3247 opo->in_port = ofputil_port_to_ofp11(po->in_port);
3248 opo->actions_len = htons(len);
3256 if (po->buffer_id == UINT32_MAX) {
3257 ofpbuf_put(msg, po->packet, po->packet_len);
3260 ofpmsg_update_length(msg);
3265 /* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
3267 make_echo_request(enum ofp_version ofp_version)
3269 return ofpraw_alloc_xid(OFPRAW_OFPT_ECHO_REQUEST, ofp_version,
3273 /* Creates and returns an OFPT_ECHO_REPLY message matching the
3274 * OFPT_ECHO_REQUEST message in 'rq'. */
3276 make_echo_reply(const struct ofp_header *rq)
3278 struct ofpbuf rq_buf;
3279 struct ofpbuf *reply;
3281 ofpbuf_use_const(&rq_buf, rq, ntohs(rq->length));
3282 ofpraw_pull_assert(&rq_buf);
3284 reply = ofpraw_alloc_reply(OFPRAW_OFPT_ECHO_REPLY, rq, rq_buf.size);
3285 ofpbuf_put(reply, rq_buf.data, rq_buf.size);
3290 ofputil_encode_barrier_request(enum ofp_version ofp_version)
3294 switch (ofp_version) {
3297 type = OFPRAW_OFPT11_BARRIER_REQUEST;
3301 type = OFPRAW_OFPT10_BARRIER_REQUEST;
3308 return ofpraw_alloc(type, ofp_version, 0);
3312 ofputil_frag_handling_to_string(enum ofp_config_flags flags)
3314 switch (flags & OFPC_FRAG_MASK) {
3315 case OFPC_FRAG_NORMAL: return "normal";
3316 case OFPC_FRAG_DROP: return "drop";
3317 case OFPC_FRAG_REASM: return "reassemble";
3318 case OFPC_FRAG_NX_MATCH: return "nx-match";
3325 ofputil_frag_handling_from_string(const char *s, enum ofp_config_flags *flags)
3327 if (!strcasecmp(s, "normal")) {
3328 *flags = OFPC_FRAG_NORMAL;
3329 } else if (!strcasecmp(s, "drop")) {
3330 *flags = OFPC_FRAG_DROP;
3331 } else if (!strcasecmp(s, "reassemble")) {
3332 *flags = OFPC_FRAG_REASM;
3333 } else if (!strcasecmp(s, "nx-match")) {
3334 *flags = OFPC_FRAG_NX_MATCH;
3341 /* Converts the OpenFlow 1.1+ port number 'ofp11_port' into an OpenFlow 1.0
3342 * port number and stores the latter in '*ofp10_port', for the purpose of
3343 * decoding OpenFlow 1.1+ protocol messages. Returns 0 if successful,
3344 * otherwise an OFPERR_* number.
3346 * See the definition of OFP11_MAX for an explanation of the mapping. */
3348 ofputil_port_from_ofp11(ovs_be32 ofp11_port, uint16_t *ofp10_port)
3350 uint32_t ofp11_port_h = ntohl(ofp11_port);
3352 if (ofp11_port_h < OFPP_MAX) {
3353 *ofp10_port = ofp11_port_h;
3355 } else if (ofp11_port_h >= OFPP11_MAX) {
3356 *ofp10_port = ofp11_port_h - OFPP11_OFFSET;
3359 VLOG_WARN_RL(&bad_ofmsg_rl, "port %"PRIu32" is outside the supported "
3360 "range 0 through %d or 0x%"PRIx32" through 0x%"PRIx32,
3361 ofp11_port_h, OFPP_MAX - 1,
3362 (uint32_t) OFPP11_MAX, UINT32_MAX);
3363 return OFPERR_OFPBAC_BAD_OUT_PORT;
3367 /* Returns the OpenFlow 1.1+ port number equivalent to the OpenFlow 1.0 port
3368 * number 'ofp10_port', for encoding OpenFlow 1.1+ protocol messages.
3370 * See the definition of OFP11_MAX for an explanation of the mapping. */
3372 ofputil_port_to_ofp11(uint16_t ofp10_port)
3374 return htonl(ofp10_port < OFPP_MAX
3376 : ofp10_port + OFPP11_OFFSET);
3379 /* Checks that 'port' is a valid output port for the OFPAT10_OUTPUT action, given
3380 * that the switch will never have more than 'max_ports' ports. Returns 0 if
3381 * 'port' is valid, otherwise an OpenFlow return code. */
3383 ofputil_check_output_port(uint16_t port, int max_ports)
3391 case OFPP_CONTROLLER:
3397 if (port < max_ports) {
3400 return OFPERR_OFPBAC_BAD_OUT_PORT;
3404 #define OFPUTIL_NAMED_PORTS \
3405 OFPUTIL_NAMED_PORT(IN_PORT) \
3406 OFPUTIL_NAMED_PORT(TABLE) \
3407 OFPUTIL_NAMED_PORT(NORMAL) \
3408 OFPUTIL_NAMED_PORT(FLOOD) \
3409 OFPUTIL_NAMED_PORT(ALL) \
3410 OFPUTIL_NAMED_PORT(CONTROLLER) \
3411 OFPUTIL_NAMED_PORT(LOCAL) \
3412 OFPUTIL_NAMED_PORT(NONE)
3414 /* Checks whether 's' is the string representation of an OpenFlow port number,
3415 * either as an integer or a string name (e.g. "LOCAL"). If it is, stores the
3416 * number in '*port' and returns true. Otherwise, returns false. */
3418 ofputil_port_from_string(const char *name, uint16_t *port)
3424 static const struct pair pairs[] = {
3425 #define OFPUTIL_NAMED_PORT(NAME) {#NAME, OFPP_##NAME},
3427 #undef OFPUTIL_NAMED_PORT
3429 static const int n_pairs = ARRAY_SIZE(pairs);
3432 if (str_to_int(name, 0, &i) && i >= 0 && i < UINT16_MAX) {
3437 for (i = 0; i < n_pairs; i++) {
3438 if (!strcasecmp(name, pairs[i].name)) {
3439 *port = pairs[i].value;
3446 /* Appends to 's' a string representation of the OpenFlow port number 'port'.
3447 * Most ports' string representation is just the port number, but for special
3448 * ports, e.g. OFPP_LOCAL, it is the name, e.g. "LOCAL". */
3450 ofputil_format_port(uint16_t port, struct ds *s)
3455 #define OFPUTIL_NAMED_PORT(NAME) case OFPP_##NAME: name = #NAME; break;
3457 #undef OFPUTIL_NAMED_PORT
3460 ds_put_format(s, "%"PRIu16, port);
3463 ds_put_cstr(s, name);
3466 /* Given a buffer 'b' that contains an array of OpenFlow ports of type
3467 * 'ofp_version', tries to pull the first element from the array. If
3468 * successful, initializes '*pp' with an abstract representation of the
3469 * port and returns 0. If no ports remain to be decoded, returns EOF.
3470 * On an error, returns a positive OFPERR_* value. */
3472 ofputil_pull_phy_port(enum ofp_version ofp_version, struct ofpbuf *b,
3473 struct ofputil_phy_port *pp)
3475 switch (ofp_version) {
3476 case OFP10_VERSION: {
3477 const struct ofp10_phy_port *opp = ofpbuf_try_pull(b, sizeof *opp);
3478 return opp ? ofputil_decode_ofp10_phy_port(pp, opp) : EOF;
3481 case OFP12_VERSION: {
3482 const struct ofp11_port *op = ofpbuf_try_pull(b, sizeof *op);
3483 return op ? ofputil_decode_ofp11_port(pp, op) : EOF;
3490 /* Given a buffer 'b' that contains an array of OpenFlow ports of type
3491 * 'ofp_version', returns the number of elements. */
3492 size_t ofputil_count_phy_ports(uint8_t ofp_version, struct ofpbuf *b)
3494 return b->size / ofputil_get_phy_port_size(ofp_version);
3497 /* Returns the 'enum ofputil_action_code' corresponding to 'name' (e.g. if
3498 * 'name' is "output" then the return value is OFPUTIL_OFPAT10_OUTPUT), or -1 if
3499 * 'name' is not the name of any action.
3501 * ofp-util.def lists the mapping from names to action. */
3503 ofputil_action_code_from_name(const char *name)
3505 static const char *names[OFPUTIL_N_ACTIONS] = {
3507 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) NAME,
3508 #define OFPAT11_ACTION(ENUM, STRUCT, NAME) NAME,
3509 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) NAME,
3510 #include "ofp-util.def"
3515 for (p = names; p < &names[ARRAY_SIZE(names)]; p++) {
3516 if (*p && !strcasecmp(name, *p)) {
3523 /* Appends an action of the type specified by 'code' to 'buf' and returns the
3524 * action. Initializes the parts of 'action' that identify it as having type
3525 * <ENUM> and length 'sizeof *action' and zeros the rest. For actions that
3526 * have variable length, the length used and cleared is that of struct
3529 ofputil_put_action(enum ofputil_action_code code, struct ofpbuf *buf)
3532 case OFPUTIL_ACTION_INVALID:
3535 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
3536 case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
3537 #define OFPAT11_ACTION OFPAT10_ACTION
3538 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
3539 case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
3540 #include "ofp-util.def"
3545 #define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
3547 ofputil_init_##ENUM(struct STRUCT *s) \
3549 memset(s, 0, sizeof *s); \
3550 s->type = htons(ENUM); \
3551 s->len = htons(sizeof *s); \
3555 ofputil_put_##ENUM(struct ofpbuf *buf) \
3557 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
3558 ofputil_init_##ENUM(s); \
3561 #define OFPAT11_ACTION OFPAT10_ACTION
3562 #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
3564 ofputil_init_##ENUM(struct STRUCT *s) \
3566 memset(s, 0, sizeof *s); \
3567 s->type = htons(OFPAT10_VENDOR); \
3568 s->len = htons(sizeof *s); \
3569 s->vendor = htonl(NX_VENDOR_ID); \
3570 s->subtype = htons(ENUM); \
3574 ofputil_put_##ENUM(struct ofpbuf *buf) \
3576 struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
3577 ofputil_init_##ENUM(s); \
3580 #include "ofp-util.def"
3583 ofputil_normalize_rule__(struct cls_rule *rule, bool may_log)
3586 MAY_NW_ADDR = 1 << 0, /* nw_src, nw_dst */
3587 MAY_TP_ADDR = 1 << 1, /* tp_src, tp_dst */
3588 MAY_NW_PROTO = 1 << 2, /* nw_proto */
3589 MAY_IPVx = 1 << 3, /* tos, frag, ttl */
3590 MAY_ARP_SHA = 1 << 4, /* arp_sha */
3591 MAY_ARP_THA = 1 << 5, /* arp_tha */
3592 MAY_IPV6 = 1 << 6, /* ipv6_src, ipv6_dst, ipv6_label */
3593 MAY_ND_TARGET = 1 << 7 /* nd_target */
3596 struct flow_wildcards wc;
3598 /* Figure out what fields may be matched. */
3599 if (rule->flow.dl_type == htons(ETH_TYPE_IP)) {
3600 may_match = MAY_NW_PROTO | MAY_IPVx | MAY_NW_ADDR;
3601 if (rule->flow.nw_proto == IPPROTO_TCP ||
3602 rule->flow.nw_proto == IPPROTO_UDP ||
3603 rule->flow.nw_proto == IPPROTO_ICMP) {
3604 may_match |= MAY_TP_ADDR;
3606 } else if (rule->flow.dl_type == htons(ETH_TYPE_IPV6)) {
3607 may_match = MAY_NW_PROTO | MAY_IPVx | MAY_IPV6;
3608 if (rule->flow.nw_proto == IPPROTO_TCP ||
3609 rule->flow.nw_proto == IPPROTO_UDP) {
3610 may_match |= MAY_TP_ADDR;
3611 } else if (rule->flow.nw_proto == IPPROTO_ICMPV6) {
3612 may_match |= MAY_TP_ADDR;
3613 if (rule->flow.tp_src == htons(ND_NEIGHBOR_SOLICIT)) {
3614 may_match |= MAY_ND_TARGET | MAY_ARP_SHA;
3615 } else if (rule->flow.tp_src == htons(ND_NEIGHBOR_ADVERT)) {
3616 may_match |= MAY_ND_TARGET | MAY_ARP_THA;
3619 } else if (rule->flow.dl_type == htons(ETH_TYPE_ARP)) {
3620 may_match = MAY_NW_PROTO | MAY_NW_ADDR | MAY_ARP_SHA | MAY_ARP_THA;
3625 /* Clear the fields that may not be matched. */
3627 if (!(may_match & MAY_NW_ADDR)) {
3628 wc.nw_src_mask = wc.nw_dst_mask = htonl(0);
3630 if (!(may_match & MAY_TP_ADDR)) {
3631 wc.tp_src_mask = wc.tp_dst_mask = htons(0);
3633 if (!(may_match & MAY_NW_PROTO)) {
3634 wc.nw_proto_mask = 0;
3636 if (!(may_match & MAY_IPVx)) {
3640 if (!(may_match & MAY_ARP_SHA)) {
3641 memset(wc.arp_sha_mask, 0, ETH_ADDR_LEN);
3643 if (!(may_match & MAY_ARP_THA)) {
3644 memset(wc.arp_tha_mask, 0, ETH_ADDR_LEN);
3646 if (!(may_match & MAY_IPV6)) {
3647 wc.ipv6_src_mask = wc.ipv6_dst_mask = in6addr_any;
3648 wc.ipv6_label_mask = htonl(0);
3650 if (!(may_match & MAY_ND_TARGET)) {
3651 wc.nd_target_mask = in6addr_any;
3654 /* Log any changes. */
3655 if (!flow_wildcards_equal(&wc, &rule->wc)) {
3656 bool log = may_log && !VLOG_DROP_INFO(&bad_ofmsg_rl);
3657 char *pre = log ? cls_rule_to_string(rule) : NULL;
3660 cls_rule_zero_wildcarded_fields(rule);
3663 char *post = cls_rule_to_string(rule);
3664 VLOG_INFO("normalization changed ofp_match, details:");
3665 VLOG_INFO(" pre: %s", pre);
3666 VLOG_INFO("post: %s", post);
3673 /* "Normalizes" the wildcards in 'rule'. That means:
3675 * 1. If the type of level N is known, then only the valid fields for that
3676 * level may be specified. For example, ARP does not have a TOS field,
3677 * so nw_tos must be wildcarded if 'rule' specifies an ARP flow.
3678 * Similarly, IPv4 does not have any IPv6 addresses, so ipv6_src and
3679 * ipv6_dst (and other fields) must be wildcarded if 'rule' specifies an
3682 * 2. If the type of level N is not known (or not understood by Open
3683 * vSwitch), then no fields at all for that level may be specified. For
3684 * example, Open vSwitch does not understand SCTP, an L4 protocol, so the
3685 * L4 fields tp_src and tp_dst must be wildcarded if 'rule' specifies an
3688 * If this function changes 'rule', it logs a rate-limited informational
3691 ofputil_normalize_rule(struct cls_rule *rule)
3693 ofputil_normalize_rule__(rule, true);
3696 /* Same as ofputil_normalize_rule() without the logging. Thus, this function
3697 * is suitable for a program's internal use, whereas ofputil_normalize_rule()
3698 * sense for use on flows received from elsewhere (so that a bug in the program
3699 * that sent them can be reported and corrected). */
3701 ofputil_normalize_rule_quiet(struct cls_rule *rule)
3703 ofputil_normalize_rule__(rule, false);
3706 /* Parses a key or a key-value pair from '*stringp'.
3708 * On success: Stores the key into '*keyp'. Stores the value, if present, into
3709 * '*valuep', otherwise an empty string. Advances '*stringp' past the end of
3710 * the key-value pair, preparing it for another call. '*keyp' and '*valuep'
3711 * are substrings of '*stringp' created by replacing some of its bytes by null
3712 * terminators. Returns true.
3714 * If '*stringp' is just white space or commas, sets '*keyp' and '*valuep' to
3715 * NULL and returns false. */
3717 ofputil_parse_key_value(char **stringp, char **keyp, char **valuep)
3719 char *pos, *key, *value;
3723 pos += strspn(pos, ", \t\r\n");
3725 *keyp = *valuep = NULL;
3730 key_len = strcspn(pos, ":=(, \t\r\n");
3731 if (key[key_len] == ':' || key[key_len] == '=') {
3732 /* The value can be separated by a colon. */
3735 value = key + key_len + 1;
3736 value_len = strcspn(value, ", \t\r\n");
3737 pos = value + value_len + (value[value_len] != '\0');
3738 value[value_len] = '\0';
3739 } else if (key[key_len] == '(') {
3740 /* The value can be surrounded by balanced parentheses. The outermost
3741 * set of parentheses is removed. */
3745 value = key + key_len + 1;
3746 for (value_len = 0; level > 0; value_len++) {
3747 switch (value[value_len]) {
3761 value[value_len - 1] = '\0';
3762 pos = value + value_len;
3764 /* There might be no value at all. */
3765 value = key + key_len; /* Will become the empty string below. */
3766 pos = key + key_len + (key[key_len] != '\0');
3768 key[key_len] = '\0';