2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 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.
17 #include <sys/types.h>
22 #include <netinet/in.h>
23 #include <netinet/icmp6.h>
24 #include <netinet/ip6.h>
28 #include "byte-order.h"
31 #include "dynamic-string.h"
36 #include "openflow/openflow.h"
40 #include "unaligned.h"
42 COVERAGE_DEFINE(flow_extract);
43 COVERAGE_DEFINE(miniflow_malloc);
45 /* U64 indices for segmented flow classification. */
46 const uint8_t flow_segment_u64s[4] = {
47 FLOW_SEGMENT_1_ENDS_AT / sizeof(uint64_t),
48 FLOW_SEGMENT_2_ENDS_AT / sizeof(uint64_t),
49 FLOW_SEGMENT_3_ENDS_AT / sizeof(uint64_t),
53 /* miniflow_extract() assumes the following to be true to optimize the
54 * extraction process. */
55 BUILD_ASSERT_DECL(offsetof(struct flow, dl_type) + 2
56 == offsetof(struct flow, vlan_tci) &&
57 offsetof(struct flow, dl_type) / 4
58 == offsetof(struct flow, vlan_tci) / 4 );
60 BUILD_ASSERT_DECL(offsetof(struct flow, nw_frag) + 3
61 == offsetof(struct flow, nw_proto) &&
62 offsetof(struct flow, nw_tos) + 2
63 == offsetof(struct flow, nw_proto) &&
64 offsetof(struct flow, nw_ttl) + 1
65 == offsetof(struct flow, nw_proto) &&
66 offsetof(struct flow, nw_frag) / 4
67 == offsetof(struct flow, nw_tos) / 4 &&
68 offsetof(struct flow, nw_ttl) / 4
69 == offsetof(struct flow, nw_tos) / 4 &&
70 offsetof(struct flow, nw_proto) / 4
71 == offsetof(struct flow, nw_tos) / 4);
73 /* TCP flags in the middle of a BE64, zeroes in the other half. */
74 BUILD_ASSERT_DECL(offsetof(struct flow, tcp_flags) % 8 == 4);
77 #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl) \
80 #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl))
83 BUILD_ASSERT_DECL(offsetof(struct flow, tp_src) + 2
84 == offsetof(struct flow, tp_dst) &&
85 offsetof(struct flow, tp_src) / 4
86 == offsetof(struct flow, tp_dst) / 4);
88 /* Removes 'size' bytes from the head end of '*datap', of size '*sizep', which
89 * must contain at least 'size' bytes of data. Returns the first byte of data
91 static inline const void *
92 data_pull(void **datap, size_t *sizep, size_t size)
94 char *data = (char *)*datap;
100 /* If '*datap' has at least 'size' bytes of data, removes that many bytes from
101 * the head end of '*datap' and returns the first byte removed. Otherwise,
102 * returns a null pointer without modifying '*datap'. */
103 static inline const void *
104 data_try_pull(void **datap, size_t *sizep, size_t size)
106 return OVS_LIKELY(*sizep >= size) ? data_pull(datap, sizep, size) : NULL;
109 /* Context for pushing data to a miniflow. */
113 uint64_t * const end;
116 /* miniflow_push_* macros allow filling in a miniflow data values in order.
117 * Assertions are needed only when the layout of the struct flow is modified.
118 * 'ofs' is a compile-time constant, which allows most of the code be optimized
119 * away. Some GCC versions gave warnings on ALWAYS_INLINE, so these are
120 * defined as macros. */
122 #if (FLOW_WC_SEQ != 31)
123 #define MINIFLOW_ASSERT(X) ovs_assert(X)
124 BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime "
125 "assertions enabled. Consider updating FLOW_WC_SEQ after "
128 #define MINIFLOW_ASSERT(X)
131 #define miniflow_push_uint64_(MF, OFS, VALUE) \
133 MINIFLOW_ASSERT(MF.data < MF.end && (OFS) % 8 == 0 \
134 && !(MF.map & (UINT64_MAX << (OFS) / 8))); \
135 *MF.data++ = VALUE; \
136 MF.map |= UINT64_C(1) << (OFS) / 8; \
139 #define miniflow_push_be64_(MF, OFS, VALUE) \
140 miniflow_push_uint64_(MF, OFS, (OVS_FORCE uint64_t)(VALUE))
142 #define miniflow_push_uint32_(MF, OFS, VALUE) \
144 MINIFLOW_ASSERT(MF.data < MF.end && \
145 (((OFS) % 8 == 0 && !(MF.map & (UINT64_MAX << (OFS) / 8))) \
146 || ((OFS) % 8 == 4 && MF.map & (UINT64_C(1) << (OFS) / 8) \
147 && !(MF.map & (UINT64_MAX << ((OFS) / 8 + 1)))))); \
149 if ((OFS) % 8 == 0) { \
150 *(uint32_t *)MF.data = VALUE; \
151 MF.map |= UINT64_C(1) << (OFS) / 8; \
152 } else if ((OFS) % 8 == 4) { \
153 *((uint32_t *)MF.data + 1) = VALUE; \
158 #define miniflow_push_be32_(MF, OFS, VALUE) \
159 miniflow_push_uint32_(MF, OFS, (OVS_FORCE uint32_t)(VALUE))
161 #define miniflow_push_uint16_(MF, OFS, VALUE) \
163 MINIFLOW_ASSERT(MF.data < MF.end && \
164 (((OFS) % 8 == 0 && !(MF.map & (UINT64_MAX << (OFS) / 8))) \
165 || ((OFS) % 2 == 0 && MF.map & (UINT64_C(1) << (OFS) / 8) \
166 && !(MF.map & (UINT64_MAX << ((OFS) / 8 + 1)))))); \
168 if ((OFS) % 8 == 0) { \
169 *(uint16_t *)MF.data = VALUE; \
170 MF.map |= UINT64_C(1) << (OFS) / 8; \
171 } else if ((OFS) % 8 == 2) { \
172 *((uint16_t *)MF.data + 1) = VALUE; \
173 } else if ((OFS) % 8 == 4) { \
174 *((uint16_t *)MF.data + 2) = VALUE; \
175 } else if ((OFS) % 8 == 6) { \
176 *((uint16_t *)MF.data + 3) = VALUE; \
181 #define miniflow_pad_to_64_(MF, OFS) \
183 MINIFLOW_ASSERT((OFS) % 8 != 0); \
184 MINIFLOW_ASSERT(MF.map & (UINT64_C(1) << (OFS) / 8)); \
185 MINIFLOW_ASSERT(!(MF.map & (UINT64_MAX << ((OFS) / 8 + 1)))); \
187 memset((uint8_t *)MF.data + (OFS) % 8, 0, 8 - (OFS) % 8); \
191 #define miniflow_push_be16_(MF, OFS, VALUE) \
192 miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE);
194 /* Data at 'valuep' may be unaligned. */
195 #define miniflow_push_words_(MF, OFS, VALUEP, N_WORDS) \
197 int ofs64 = (OFS) / 8; \
199 MINIFLOW_ASSERT(MF.data + (N_WORDS) <= MF.end && (OFS) % 8 == 0 \
200 && !(MF.map & (UINT64_MAX << ofs64))); \
202 memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof *MF.data); \
203 MF.data += (N_WORDS); \
204 MF.map |= ((UINT64_MAX >> (64 - (N_WORDS))) << ofs64); \
207 /* Push 32-bit words padded to 64-bits. */
208 #define miniflow_push_words_32_(MF, OFS, VALUEP, N_WORDS) \
210 int ofs64 = (OFS) / 8; \
212 MINIFLOW_ASSERT(MF.data + DIV_ROUND_UP(N_WORDS, 2) <= MF.end \
214 && !(MF.map & (UINT64_MAX << ofs64))); \
216 memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof(uint32_t)); \
217 MF.data += DIV_ROUND_UP(N_WORDS, 2); \
218 MF.map |= ((UINT64_MAX >> (64 - DIV_ROUND_UP(N_WORDS, 2))) << ofs64); \
219 if ((N_WORDS) & 1) { \
220 *((uint32_t *)MF.data - 1) = 0; \
224 /* Data at 'valuep' may be unaligned. */
225 /* MACs start 64-aligned, and must be followed by other data or padding. */
226 #define miniflow_push_macs_(MF, OFS, VALUEP) \
228 int ofs64 = (OFS) / 8; \
230 MINIFLOW_ASSERT(MF.data + 2 <= MF.end && (OFS) % 8 == 0 \
231 && !(MF.map & (UINT64_MAX << ofs64))); \
233 memcpy(MF.data, (VALUEP), 2 * ETH_ADDR_LEN); \
234 MF.data += 1; /* First word only. */ \
235 MF.map |= UINT64_C(3) << ofs64; /* Both words. */ \
238 #define miniflow_push_uint32(MF, FIELD, VALUE) \
239 miniflow_push_uint32_(MF, offsetof(struct flow, FIELD), VALUE)
241 #define miniflow_push_be32(MF, FIELD, VALUE) \
242 miniflow_push_be32_(MF, offsetof(struct flow, FIELD), VALUE)
244 #define miniflow_push_uint16(MF, FIELD, VALUE) \
245 miniflow_push_uint16_(MF, offsetof(struct flow, FIELD), VALUE)
247 #define miniflow_push_be16(MF, FIELD, VALUE) \
248 miniflow_push_be16_(MF, offsetof(struct flow, FIELD), VALUE)
250 #define miniflow_pad_to_64(MF, FIELD) \
251 miniflow_pad_to_64_(MF, offsetof(struct flow, FIELD))
253 #define miniflow_push_words(MF, FIELD, VALUEP, N_WORDS) \
254 miniflow_push_words_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS)
256 #define miniflow_push_words_32(MF, FIELD, VALUEP, N_WORDS) \
257 miniflow_push_words_32_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS)
259 #define miniflow_push_macs(MF, FIELD, VALUEP) \
260 miniflow_push_macs_(MF, offsetof(struct flow, FIELD), VALUEP)
262 /* Pulls the MPLS headers at '*datap' and returns the count of them. */
264 parse_mpls(void **datap, size_t *sizep)
266 const struct mpls_hdr *mh;
269 while ((mh = data_try_pull(datap, sizep, sizeof *mh))) {
271 if (mh->mpls_lse.lo & htons(1 << MPLS_BOS_SHIFT)) {
275 return MIN(count, FLOW_MAX_MPLS_LABELS);
278 static inline ovs_be16
279 parse_vlan(void **datap, size_t *sizep)
281 const struct eth_header *eth = *datap;
284 ovs_be16 eth_type; /* ETH_TYPE_VLAN */
288 data_pull(datap, sizep, ETH_ADDR_LEN * 2);
290 if (eth->eth_type == htons(ETH_TYPE_VLAN)) {
291 if (OVS_LIKELY(*sizep
292 >= sizeof(struct qtag_prefix) + sizeof(ovs_be16))) {
293 const struct qtag_prefix *qp = data_pull(datap, sizep, sizeof *qp);
294 return qp->tci | htons(VLAN_CFI);
300 static inline ovs_be16
301 parse_ethertype(void **datap, size_t *sizep)
303 const struct llc_snap_header *llc;
306 proto = *(ovs_be16 *) data_pull(datap, sizep, sizeof proto);
307 if (OVS_LIKELY(ntohs(proto) >= ETH_TYPE_MIN)) {
311 if (OVS_UNLIKELY(*sizep < sizeof *llc)) {
312 return htons(FLOW_DL_TYPE_NONE);
316 if (OVS_UNLIKELY(llc->llc.llc_dsap != LLC_DSAP_SNAP
317 || llc->llc.llc_ssap != LLC_SSAP_SNAP
318 || llc->llc.llc_cntl != LLC_CNTL_SNAP
319 || memcmp(llc->snap.snap_org, SNAP_ORG_ETHERNET,
320 sizeof llc->snap.snap_org))) {
321 return htons(FLOW_DL_TYPE_NONE);
324 data_pull(datap, sizep, sizeof *llc);
326 if (OVS_LIKELY(ntohs(llc->snap.snap_type) >= ETH_TYPE_MIN)) {
327 return llc->snap.snap_type;
330 return htons(FLOW_DL_TYPE_NONE);
334 parse_icmpv6(void **datap, size_t *sizep, const struct icmp6_hdr *icmp,
335 const struct in6_addr **nd_target,
336 uint8_t arp_buf[2][ETH_ADDR_LEN])
338 if (icmp->icmp6_code == 0 &&
339 (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
340 icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) {
342 *nd_target = data_try_pull(datap, sizep, sizeof **nd_target);
343 if (OVS_UNLIKELY(!*nd_target)) {
347 while (*sizep >= 8) {
348 /* The minimum size of an option is 8 bytes, which also is
349 * the size of Ethernet link-layer options. */
350 const struct nd_opt_hdr *nd_opt = *datap;
351 int opt_len = nd_opt->nd_opt_len * 8;
353 if (!opt_len || opt_len > *sizep) {
357 /* Store the link layer address if the appropriate option is
358 * provided. It is considered an error if the same link
359 * layer option is specified twice. */
360 if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR
362 if (OVS_LIKELY(eth_addr_is_zero(arp_buf[0]))) {
363 memcpy(arp_buf[0], nd_opt + 1, ETH_ADDR_LEN);
367 } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR
369 if (OVS_LIKELY(eth_addr_is_zero(arp_buf[1]))) {
370 memcpy(arp_buf[1], nd_opt + 1, ETH_ADDR_LEN);
376 if (OVS_UNLIKELY(!data_try_pull(datap, sizep, opt_len))) {
388 /* Initializes 'flow' members from 'packet' and 'md'
390 * Initializes 'packet' header l2 pointer to the start of the Ethernet
391 * header, and the layer offsets as follows:
393 * - packet->l2_5_ofs to the start of the MPLS shim header, or UINT16_MAX
394 * when there is no MPLS shim header.
396 * - packet->l3_ofs to just past the Ethernet header, or just past the
397 * vlan_header if one is present, to the first byte of the payload of the
398 * Ethernet frame. UINT16_MAX if the frame is too short to contain an
401 * - packet->l4_ofs to just past the IPv4 header, if one is present and
402 * has at least the content used for the fields of interest for the flow,
403 * otherwise UINT16_MAX.
406 flow_extract(struct ofpbuf *packet, const struct pkt_metadata *md,
411 uint64_t buf[FLOW_U64S];
414 COVERAGE_INC(flow_extract);
416 miniflow_initialize(&m.mf, m.buf);
417 miniflow_extract(packet, md, &m.mf);
418 miniflow_expand(&m.mf, flow);
421 /* Caller is responsible for initializing 'dst' with enough storage for
422 * FLOW_U64S * 8 bytes. */
424 miniflow_extract(struct ofpbuf *packet, const struct pkt_metadata *md,
425 struct miniflow *dst)
427 void *data = ofpbuf_data(packet);
428 size_t size = ofpbuf_size(packet);
429 uint64_t *values = miniflow_values(dst);
430 struct mf_ctx mf = { 0, values, values + FLOW_U64S };
433 uint8_t nw_frag, nw_tos, nw_ttl, nw_proto;
437 if (md->tunnel.ip_dst) {
438 miniflow_push_words(mf, tunnel, &md->tunnel,
439 sizeof md->tunnel / sizeof(uint64_t));
441 if (md->skb_priority || md->pkt_mark) {
442 miniflow_push_uint32(mf, skb_priority, md->skb_priority);
443 miniflow_push_uint32(mf, pkt_mark, md->pkt_mark);
445 miniflow_push_uint32(mf, dp_hash, md->dp_hash);
446 miniflow_push_uint32(mf, in_port, odp_to_u32(md->in_port.odp_port));
448 miniflow_push_uint32(mf, recirc_id, md->recirc_id);
449 miniflow_pad_to_64(mf, conj_id);
453 /* Initialize packet's layer pointer and offsets. */
455 ofpbuf_set_frame(packet, data);
457 /* Must have full Ethernet header to proceed. */
458 if (OVS_UNLIKELY(size < sizeof(struct eth_header))) {
464 BUILD_ASSERT(offsetof(struct flow, dl_dst) + 6
465 == offsetof(struct flow, dl_src));
466 miniflow_push_macs(mf, dl_dst, data);
467 /* dl_type, vlan_tci. */
468 vlan_tci = parse_vlan(&data, &size);
469 dl_type = parse_ethertype(&data, &size);
470 miniflow_push_be16(mf, dl_type, dl_type);
471 miniflow_push_be16(mf, vlan_tci, vlan_tci);
475 if (OVS_UNLIKELY(eth_type_mpls(dl_type))) {
477 const void *mpls = data;
479 packet->l2_5_ofs = (char *)data - l2;
480 count = parse_mpls(&data, &size);
481 miniflow_push_words_32(mf, mpls_lse, mpls, count);
485 packet->l3_ofs = (char *)data - l2;
488 if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) {
489 const struct ip_header *nh = data;
493 if (OVS_UNLIKELY(size < IP_HEADER_LEN)) {
496 ip_len = IP_IHL(nh->ip_ihl_ver) * 4;
498 if (OVS_UNLIKELY(ip_len < IP_HEADER_LEN)) {
501 if (OVS_UNLIKELY(size < ip_len)) {
504 tot_len = ntohs(nh->ip_tot_len);
505 if (OVS_UNLIKELY(tot_len > size)) {
508 if (OVS_UNLIKELY(size - tot_len > UINT8_MAX)) {
511 ofpbuf_set_l2_pad_size(packet, size - tot_len);
512 size = tot_len; /* Never pull padding. */
514 /* Push both source and destination address at once. */
515 miniflow_push_words(mf, nw_src, &nh->ip_src, 1);
517 miniflow_push_be32(mf, ipv6_label, 0); /* Padding for IPv4. */
521 nw_proto = nh->ip_proto;
522 if (OVS_UNLIKELY(IP_IS_FRAGMENT(nh->ip_frag_off))) {
523 nw_frag = FLOW_NW_FRAG_ANY;
524 if (nh->ip_frag_off & htons(IP_FRAG_OFF_MASK)) {
525 nw_frag |= FLOW_NW_FRAG_LATER;
528 data_pull(&data, &size, ip_len);
529 } else if (dl_type == htons(ETH_TYPE_IPV6)) {
530 const struct ovs_16aligned_ip6_hdr *nh;
534 if (OVS_UNLIKELY(size < sizeof *nh)) {
537 nh = data_pull(&data, &size, sizeof *nh);
539 plen = ntohs(nh->ip6_plen);
540 if (OVS_UNLIKELY(plen > size)) {
543 /* Jumbo Payload option not supported yet. */
544 if (OVS_UNLIKELY(size - plen > UINT8_MAX)) {
547 ofpbuf_set_l2_pad_size(packet, size - plen);
548 size = plen; /* Never pull padding. */
550 miniflow_push_words(mf, ipv6_src, &nh->ip6_src,
551 sizeof nh->ip6_src / 8);
552 miniflow_push_words(mf, ipv6_dst, &nh->ip6_dst,
553 sizeof nh->ip6_dst / 8);
555 tc_flow = get_16aligned_be32(&nh->ip6_flow);
557 ovs_be32 label = tc_flow & htonl(IPV6_LABEL_MASK);
558 miniflow_push_be32(mf, ipv6_label, label);
561 nw_tos = ntohl(tc_flow) >> 20;
562 nw_ttl = nh->ip6_hlim;
563 nw_proto = nh->ip6_nxt;
566 if (OVS_LIKELY((nw_proto != IPPROTO_HOPOPTS)
567 && (nw_proto != IPPROTO_ROUTING)
568 && (nw_proto != IPPROTO_DSTOPTS)
569 && (nw_proto != IPPROTO_AH)
570 && (nw_proto != IPPROTO_FRAGMENT))) {
571 /* It's either a terminal header (e.g., TCP, UDP) or one we
572 * don't understand. In either case, we're done with the
573 * packet, so use it to fill in 'nw_proto'. */
577 /* We only verify that at least 8 bytes of the next header are
578 * available, but many of these headers are longer. Ensure that
579 * accesses within the extension header are within those first 8
580 * bytes. All extension headers are required to be at least 8
582 if (OVS_UNLIKELY(size < 8)) {
586 if ((nw_proto == IPPROTO_HOPOPTS)
587 || (nw_proto == IPPROTO_ROUTING)
588 || (nw_proto == IPPROTO_DSTOPTS)) {
589 /* These headers, while different, have the fields we care
590 * about in the same location and with the same
592 const struct ip6_ext *ext_hdr = data;
593 nw_proto = ext_hdr->ip6e_nxt;
594 if (OVS_UNLIKELY(!data_try_pull(&data, &size,
595 (ext_hdr->ip6e_len + 1) * 8))) {
598 } else if (nw_proto == IPPROTO_AH) {
599 /* A standard AH definition isn't available, but the fields
600 * we care about are in the same location as the generic
601 * option header--only the header length is calculated
603 const struct ip6_ext *ext_hdr = data;
604 nw_proto = ext_hdr->ip6e_nxt;
605 if (OVS_UNLIKELY(!data_try_pull(&data, &size,
606 (ext_hdr->ip6e_len + 2) * 4))) {
609 } else if (nw_proto == IPPROTO_FRAGMENT) {
610 const struct ovs_16aligned_ip6_frag *frag_hdr = data;
612 nw_proto = frag_hdr->ip6f_nxt;
613 if (!data_try_pull(&data, &size, sizeof *frag_hdr)) {
617 /* We only process the first fragment. */
618 if (frag_hdr->ip6f_offlg != htons(0)) {
619 nw_frag = FLOW_NW_FRAG_ANY;
620 if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) {
621 nw_frag |= FLOW_NW_FRAG_LATER;
622 nw_proto = IPPROTO_FRAGMENT;
629 if (dl_type == htons(ETH_TYPE_ARP) ||
630 dl_type == htons(ETH_TYPE_RARP)) {
631 uint8_t arp_buf[2][ETH_ADDR_LEN];
632 const struct arp_eth_header *arp = (const struct arp_eth_header *)
633 data_try_pull(&data, &size, ARP_ETH_HEADER_LEN);
635 if (OVS_LIKELY(arp) && OVS_LIKELY(arp->ar_hrd == htons(1))
636 && OVS_LIKELY(arp->ar_pro == htons(ETH_TYPE_IP))
637 && OVS_LIKELY(arp->ar_hln == ETH_ADDR_LEN)
638 && OVS_LIKELY(arp->ar_pln == 4)) {
639 miniflow_push_be32(mf, nw_src,
640 get_16aligned_be32(&arp->ar_spa));
641 miniflow_push_be32(mf, nw_dst,
642 get_16aligned_be32(&arp->ar_tpa));
644 /* We only match on the lower 8 bits of the opcode. */
645 if (OVS_LIKELY(ntohs(arp->ar_op) <= 0xff)) {
646 miniflow_push_be32(mf, ipv6_label, 0); /* Pad with ARP. */
647 miniflow_push_be32(mf, nw_frag, htonl(ntohs(arp->ar_op)));
650 /* Must be adjacent. */
651 BUILD_ASSERT(offsetof(struct flow, arp_sha) + 6
652 == offsetof(struct flow, arp_tha));
654 memcpy(arp_buf[0], arp->ar_sha, ETH_ADDR_LEN);
655 memcpy(arp_buf[1], arp->ar_tha, ETH_ADDR_LEN);
656 miniflow_push_macs(mf, arp_sha, arp_buf);
657 miniflow_pad_to_64(mf, tcp_flags);
663 packet->l4_ofs = (char *)data - l2;
664 miniflow_push_be32(mf, nw_frag,
665 BYTES_TO_BE32(nw_frag, nw_tos, nw_ttl, nw_proto));
667 if (OVS_LIKELY(!(nw_frag & FLOW_NW_FRAG_LATER))) {
668 if (OVS_LIKELY(nw_proto == IPPROTO_TCP)) {
669 if (OVS_LIKELY(size >= TCP_HEADER_LEN)) {
670 const struct tcp_header *tcp = data;
672 miniflow_push_be32(mf, arp_tha[2], 0);
673 miniflow_push_be32(mf, tcp_flags,
674 TCP_FLAGS_BE32(tcp->tcp_ctl));
675 miniflow_push_be16(mf, tp_src, tcp->tcp_src);
676 miniflow_push_be16(mf, tp_dst, tcp->tcp_dst);
677 miniflow_pad_to_64(mf, igmp_group_ip4);
679 } else if (OVS_LIKELY(nw_proto == IPPROTO_UDP)) {
680 if (OVS_LIKELY(size >= UDP_HEADER_LEN)) {
681 const struct udp_header *udp = data;
683 miniflow_push_be16(mf, tp_src, udp->udp_src);
684 miniflow_push_be16(mf, tp_dst, udp->udp_dst);
685 miniflow_pad_to_64(mf, igmp_group_ip4);
687 } else if (OVS_LIKELY(nw_proto == IPPROTO_SCTP)) {
688 if (OVS_LIKELY(size >= SCTP_HEADER_LEN)) {
689 const struct sctp_header *sctp = data;
691 miniflow_push_be16(mf, tp_src, sctp->sctp_src);
692 miniflow_push_be16(mf, tp_dst, sctp->sctp_dst);
693 miniflow_pad_to_64(mf, igmp_group_ip4);
695 } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMP)) {
696 if (OVS_LIKELY(size >= ICMP_HEADER_LEN)) {
697 const struct icmp_header *icmp = data;
699 miniflow_push_be16(mf, tp_src, htons(icmp->icmp_type));
700 miniflow_push_be16(mf, tp_dst, htons(icmp->icmp_code));
701 miniflow_pad_to_64(mf, igmp_group_ip4);
703 } else if (OVS_LIKELY(nw_proto == IPPROTO_IGMP)) {
704 if (OVS_LIKELY(size >= IGMP_HEADER_LEN)) {
705 const struct igmp_header *igmp = data;
707 miniflow_push_be16(mf, tp_src, htons(igmp->igmp_type));
708 miniflow_push_be16(mf, tp_dst, htons(igmp->igmp_code));
709 miniflow_push_be32(mf, igmp_group_ip4,
710 get_16aligned_be32(&igmp->group));
712 } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMPV6)) {
713 if (OVS_LIKELY(size >= sizeof(struct icmp6_hdr))) {
714 const struct in6_addr *nd_target = NULL;
715 uint8_t arp_buf[2][ETH_ADDR_LEN];
716 const struct icmp6_hdr *icmp = data_pull(&data, &size,
718 memset(arp_buf, 0, sizeof arp_buf);
719 if (OVS_LIKELY(parse_icmpv6(&data, &size, icmp, &nd_target,
722 miniflow_push_words(mf, nd_target, nd_target,
723 sizeof *nd_target / 8);
725 miniflow_push_macs(mf, arp_sha, arp_buf);
726 miniflow_pad_to_64(mf, tcp_flags);
727 miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type));
728 miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code));
729 miniflow_pad_to_64(mf, igmp_group_ip4);
738 /* For every bit of a field that is wildcarded in 'wildcards', sets the
739 * corresponding bit in 'flow' to zero. */
741 flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards)
743 uint64_t *flow_u64 = (uint64_t *) flow;
744 const uint64_t *wc_u64 = (const uint64_t *) &wildcards->masks;
747 for (i = 0; i < FLOW_U64S; i++) {
748 flow_u64[i] &= wc_u64[i];
753 flow_unwildcard_tp_ports(const struct flow *flow, struct flow_wildcards *wc)
755 if (flow->nw_proto != IPPROTO_ICMP) {
756 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
757 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
759 wc->masks.tp_src = htons(0xff);
760 wc->masks.tp_dst = htons(0xff);
764 /* Initializes 'fmd' with the metadata found in 'flow'. */
766 flow_get_metadata(const struct flow *flow, struct flow_metadata *fmd)
768 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 31);
770 fmd->dp_hash = flow->dp_hash;
771 fmd->recirc_id = flow->recirc_id;
772 fmd->tun_id = flow->tunnel.tun_id;
773 fmd->tun_src = flow->tunnel.ip_src;
774 fmd->tun_dst = flow->tunnel.ip_dst;
775 fmd->gbp_id = flow->tunnel.gbp_id;
776 fmd->gbp_flags = flow->tunnel.gbp_flags;
777 fmd->metadata = flow->metadata;
778 memcpy(fmd->regs, flow->regs, sizeof fmd->regs);
779 fmd->pkt_mark = flow->pkt_mark;
780 fmd->in_port = flow->in_port.ofp_port;
784 flow_to_string(const struct flow *flow)
786 struct ds ds = DS_EMPTY_INITIALIZER;
787 flow_format(&ds, flow);
792 flow_tun_flag_to_string(uint32_t flags)
795 case FLOW_TNL_F_DONT_FRAGMENT:
797 case FLOW_TNL_F_CSUM:
809 format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t),
810 uint32_t flags, char del)
818 uint32_t bit = rightmost_1bit(flags);
821 s = bit_to_string(bit);
823 ds_put_format(ds, "%s%c", s, del);
832 ds_put_format(ds, "0x%"PRIx32"%c", bad, del);
838 format_flags_masked(struct ds *ds, const char *name,
839 const char *(*bit_to_string)(uint32_t), uint32_t flags,
843 ds_put_format(ds, "%s=", name);
846 uint32_t bit = rightmost_1bit(mask);
847 const char *s = bit_to_string(bit);
849 ds_put_format(ds, "%s%s", (flags & bit) ? "+" : "-",
850 s ? s : "[Unknown]");
856 flow_format(struct ds *ds, const struct flow *flow)
859 struct flow_wildcards *wc = &match.wc;
861 match_wc_init(&match, flow);
863 /* As this function is most often used for formatting a packet in a
864 * packet-in message, skip formatting the packet context fields that are
865 * all-zeroes (Openflow spec encourages leaving out all-zeroes context
866 * fields from the packet-in messages). We make an exception with the
867 * 'in_port' field, which we always format, as packets usually have an
868 * in_port, and 0 is a port just like any other port. */
869 if (!flow->skb_priority) {
870 WC_UNMASK_FIELD(wc, skb_priority);
872 if (!flow->pkt_mark) {
873 WC_UNMASK_FIELD(wc, pkt_mark);
875 if (!flow->recirc_id) {
876 WC_UNMASK_FIELD(wc, recirc_id);
878 for (int i = 0; i < FLOW_N_REGS; i++) {
879 if (!flow->regs[i]) {
880 WC_UNMASK_FIELD(wc, regs[i]);
883 if (!flow->metadata) {
884 WC_UNMASK_FIELD(wc, metadata);
887 match_format(&match, ds, OFP_DEFAULT_PRIORITY);
891 flow_print(FILE *stream, const struct flow *flow)
893 char *s = flow_to_string(flow);
898 /* flow_wildcards functions. */
900 /* Initializes 'wc' as a set of wildcards that matches every packet. */
902 flow_wildcards_init_catchall(struct flow_wildcards *wc)
904 memset(&wc->masks, 0, sizeof wc->masks);
907 /* Converts a flow into flow wildcards. It sets the wildcard masks based on
908 * the packet headers extracted to 'flow'. It will not set the mask for fields
909 * that do not make sense for the packet type. OpenFlow-only metadata is
910 * wildcarded, but other metadata is unconditionally exact-matched. */
911 void flow_wildcards_init_for_packet(struct flow_wildcards *wc,
912 const struct flow *flow)
914 memset(&wc->masks, 0x0, sizeof wc->masks);
916 /* Update this function whenever struct flow changes. */
917 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 31);
919 if (flow->tunnel.ip_dst) {
920 if (flow->tunnel.flags & FLOW_TNL_F_KEY) {
921 WC_MASK_FIELD(wc, tunnel.tun_id);
923 WC_MASK_FIELD(wc, tunnel.ip_src);
924 WC_MASK_FIELD(wc, tunnel.ip_dst);
925 WC_MASK_FIELD(wc, tunnel.flags);
926 WC_MASK_FIELD(wc, tunnel.ip_tos);
927 WC_MASK_FIELD(wc, tunnel.ip_ttl);
928 WC_MASK_FIELD(wc, tunnel.tp_src);
929 WC_MASK_FIELD(wc, tunnel.tp_dst);
930 WC_MASK_FIELD(wc, tunnel.gbp_id);
931 WC_MASK_FIELD(wc, tunnel.gbp_flags);
932 } else if (flow->tunnel.tun_id) {
933 WC_MASK_FIELD(wc, tunnel.tun_id);
936 /* metadata, regs, and conj_id wildcarded. */
938 WC_MASK_FIELD(wc, skb_priority);
939 WC_MASK_FIELD(wc, pkt_mark);
940 WC_MASK_FIELD(wc, recirc_id);
941 WC_MASK_FIELD(wc, dp_hash);
942 WC_MASK_FIELD(wc, in_port);
944 /* actset_output wildcarded. */
946 WC_MASK_FIELD(wc, dl_dst);
947 WC_MASK_FIELD(wc, dl_src);
948 WC_MASK_FIELD(wc, dl_type);
949 WC_MASK_FIELD(wc, vlan_tci);
951 if (flow->dl_type == htons(ETH_TYPE_IP)) {
952 WC_MASK_FIELD(wc, nw_src);
953 WC_MASK_FIELD(wc, nw_dst);
954 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
955 WC_MASK_FIELD(wc, ipv6_src);
956 WC_MASK_FIELD(wc, ipv6_dst);
957 WC_MASK_FIELD(wc, ipv6_label);
958 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
959 flow->dl_type == htons(ETH_TYPE_RARP)) {
960 WC_MASK_FIELD(wc, nw_src);
961 WC_MASK_FIELD(wc, nw_dst);
962 WC_MASK_FIELD(wc, nw_proto);
963 WC_MASK_FIELD(wc, arp_sha);
964 WC_MASK_FIELD(wc, arp_tha);
966 } else if (eth_type_mpls(flow->dl_type)) {
967 for (int i = 0; i < FLOW_MAX_MPLS_LABELS; i++) {
968 WC_MASK_FIELD(wc, mpls_lse[i]);
969 if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) {
975 return; /* Unknown ethertype. */
979 WC_MASK_FIELD(wc, nw_frag);
980 WC_MASK_FIELD(wc, nw_tos);
981 WC_MASK_FIELD(wc, nw_ttl);
982 WC_MASK_FIELD(wc, nw_proto);
984 /* No transport layer header in later fragments. */
985 if (!(flow->nw_frag & FLOW_NW_FRAG_LATER) &&
986 (flow->nw_proto == IPPROTO_ICMP ||
987 flow->nw_proto == IPPROTO_ICMPV6 ||
988 flow->nw_proto == IPPROTO_TCP ||
989 flow->nw_proto == IPPROTO_UDP ||
990 flow->nw_proto == IPPROTO_SCTP ||
991 flow->nw_proto == IPPROTO_IGMP)) {
992 WC_MASK_FIELD(wc, tp_src);
993 WC_MASK_FIELD(wc, tp_dst);
995 if (flow->nw_proto == IPPROTO_TCP) {
996 WC_MASK_FIELD(wc, tcp_flags);
997 } else if (flow->nw_proto == IPPROTO_ICMPV6) {
998 WC_MASK_FIELD(wc, arp_sha);
999 WC_MASK_FIELD(wc, arp_tha);
1000 WC_MASK_FIELD(wc, nd_target);
1001 } else if (flow->nw_proto == IPPROTO_IGMP) {
1002 WC_MASK_FIELD(wc, igmp_group_ip4);
1007 /* Return a map of possible fields for a packet of the same type as 'flow'.
1008 * Including extra bits in the returned mask is not wrong, it is just less
1011 * This is a less precise version of flow_wildcards_init_for_packet() above. */
1013 flow_wc_map(const struct flow *flow)
1015 /* Update this function whenever struct flow changes. */
1016 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 31);
1018 uint64_t map = (flow->tunnel.ip_dst) ? MINIFLOW_MAP(tunnel) : 0;
1020 /* Metadata fields that can appear on packet input. */
1021 map |= MINIFLOW_MAP(skb_priority) | MINIFLOW_MAP(pkt_mark)
1022 | MINIFLOW_MAP(recirc_id) | MINIFLOW_MAP(dp_hash)
1023 | MINIFLOW_MAP(in_port)
1024 | MINIFLOW_MAP(dl_dst) | MINIFLOW_MAP(dl_src)
1025 | MINIFLOW_MAP(dl_type) | MINIFLOW_MAP(vlan_tci);
1027 /* Ethertype-dependent fields. */
1028 if (OVS_LIKELY(flow->dl_type == htons(ETH_TYPE_IP))) {
1029 map |= MINIFLOW_MAP(nw_src) | MINIFLOW_MAP(nw_dst)
1030 | MINIFLOW_MAP(nw_proto) | MINIFLOW_MAP(nw_frag)
1031 | MINIFLOW_MAP(nw_tos) | MINIFLOW_MAP(nw_ttl);
1032 if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_IGMP)) {
1033 map |= MINIFLOW_MAP(igmp_group_ip4);
1035 map |= MINIFLOW_MAP(tcp_flags)
1036 | MINIFLOW_MAP(tp_src) | MINIFLOW_MAP(tp_dst);
1038 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1039 map |= MINIFLOW_MAP(ipv6_src) | MINIFLOW_MAP(ipv6_dst)
1040 | MINIFLOW_MAP(ipv6_label)
1041 | MINIFLOW_MAP(nw_proto) | MINIFLOW_MAP(nw_frag)
1042 | MINIFLOW_MAP(nw_tos) | MINIFLOW_MAP(nw_ttl);
1043 if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_ICMPV6)) {
1044 map |= MINIFLOW_MAP(nd_target)
1045 | MINIFLOW_MAP(arp_sha) | MINIFLOW_MAP(arp_tha);
1047 map |= MINIFLOW_MAP(tcp_flags)
1048 | MINIFLOW_MAP(tp_src) | MINIFLOW_MAP(tp_dst);
1050 } else if (eth_type_mpls(flow->dl_type)) {
1051 map |= MINIFLOW_MAP(mpls_lse);
1052 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
1053 flow->dl_type == htons(ETH_TYPE_RARP)) {
1054 map |= MINIFLOW_MAP(nw_src) | MINIFLOW_MAP(nw_dst)
1055 | MINIFLOW_MAP(nw_proto)
1056 | MINIFLOW_MAP(arp_sha) | MINIFLOW_MAP(arp_tha);
1062 /* Clear the metadata and register wildcard masks. They are not packet
1065 flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc)
1067 /* Update this function whenever struct flow changes. */
1068 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 31);
1070 memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata);
1071 memset(&wc->masks.regs, 0, sizeof wc->masks.regs);
1072 wc->masks.actset_output = 0;
1073 wc->masks.conj_id = 0;
1076 /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or
1079 flow_wildcards_is_catchall(const struct flow_wildcards *wc)
1081 const uint64_t *wc_u64 = (const uint64_t *) &wc->masks;
1084 for (i = 0; i < FLOW_U64S; i++) {
1092 /* Sets 'dst' as the bitwise AND of wildcards in 'src1' and 'src2'.
1093 * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded
1094 * in 'src1' or 'src2' or both. */
1096 flow_wildcards_and(struct flow_wildcards *dst,
1097 const struct flow_wildcards *src1,
1098 const struct flow_wildcards *src2)
1100 uint64_t *dst_u64 = (uint64_t *) &dst->masks;
1101 const uint64_t *src1_u64 = (const uint64_t *) &src1->masks;
1102 const uint64_t *src2_u64 = (const uint64_t *) &src2->masks;
1105 for (i = 0; i < FLOW_U64S; i++) {
1106 dst_u64[i] = src1_u64[i] & src2_u64[i];
1110 /* Sets 'dst' as the bitwise OR of wildcards in 'src1' and 'src2'. That
1111 * is, a bit or a field is wildcarded in 'dst' if it is neither
1112 * wildcarded in 'src1' nor 'src2'. */
1114 flow_wildcards_or(struct flow_wildcards *dst,
1115 const struct flow_wildcards *src1,
1116 const struct flow_wildcards *src2)
1118 uint64_t *dst_u64 = (uint64_t *) &dst->masks;
1119 const uint64_t *src1_u64 = (const uint64_t *) &src1->masks;
1120 const uint64_t *src2_u64 = (const uint64_t *) &src2->masks;
1123 for (i = 0; i < FLOW_U64S; i++) {
1124 dst_u64[i] = src1_u64[i] | src2_u64[i];
1128 /* Returns a hash of the wildcards in 'wc'. */
1130 flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis)
1132 return flow_hash(&wc->masks, basis);
1135 /* Returns true if 'a' and 'b' represent the same wildcards, false if they are
1138 flow_wildcards_equal(const struct flow_wildcards *a,
1139 const struct flow_wildcards *b)
1141 return flow_equal(&a->masks, &b->masks);
1144 /* Returns true if at least one bit or field is wildcarded in 'a' but not in
1145 * 'b', false otherwise. */
1147 flow_wildcards_has_extra(const struct flow_wildcards *a,
1148 const struct flow_wildcards *b)
1150 const uint64_t *a_u64 = (const uint64_t *) &a->masks;
1151 const uint64_t *b_u64 = (const uint64_t *) &b->masks;
1154 for (i = 0; i < FLOW_U64S; i++) {
1155 if ((a_u64[i] & b_u64[i]) != b_u64[i]) {
1162 /* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits)
1163 * in 'wc' do not need to be equal in 'a' and 'b'. */
1165 flow_equal_except(const struct flow *a, const struct flow *b,
1166 const struct flow_wildcards *wc)
1168 const uint64_t *a_u64 = (const uint64_t *) a;
1169 const uint64_t *b_u64 = (const uint64_t *) b;
1170 const uint64_t *wc_u64 = (const uint64_t *) &wc->masks;
1173 for (i = 0; i < FLOW_U64S; i++) {
1174 if ((a_u64[i] ^ b_u64[i]) & wc_u64[i]) {
1181 /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'.
1182 * (A 0-bit indicates a wildcard bit.) */
1184 flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask)
1186 wc->masks.regs[idx] = mask;
1189 /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'.
1190 * (A 0-bit indicates a wildcard bit.) */
1192 flow_wildcards_set_xreg_mask(struct flow_wildcards *wc, int idx, uint64_t mask)
1194 flow_set_xreg(&wc->masks, idx, mask);
1197 /* Calculates the 5-tuple hash from the given miniflow.
1198 * This returns the same value as flow_hash_5tuple for the corresponding
1201 miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis)
1203 uint32_t hash = basis;
1206 ovs_be16 dl_type = MINIFLOW_GET_BE16(flow, dl_type);
1208 hash = hash_add(hash, MINIFLOW_GET_U8(flow, nw_proto));
1210 /* Separate loops for better optimization. */
1211 if (dl_type == htons(ETH_TYPE_IPV6)) {
1212 uint64_t map = MINIFLOW_MAP(ipv6_src) | MINIFLOW_MAP(ipv6_dst);
1215 MINIFLOW_FOR_EACH_IN_MAP(value, flow, map) {
1216 hash = hash_add64(hash, value);
1219 hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_src));
1220 hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_dst));
1222 /* Add both ports at once. */
1223 hash = hash_add(hash, MINIFLOW_GET_U32(flow, tp_src));
1224 hash = hash_finish(hash, 42); /* Arbitrary number. */
1229 BUILD_ASSERT_DECL(offsetof(struct flow, tp_src) + 2
1230 == offsetof(struct flow, tp_dst) &&
1231 offsetof(struct flow, tp_src) / 4
1232 == offsetof(struct flow, tp_dst) / 4);
1233 BUILD_ASSERT_DECL(offsetof(struct flow, ipv6_src) + 16
1234 == offsetof(struct flow, ipv6_dst));
1236 /* Calculates the 5-tuple hash from the given flow. */
1238 flow_hash_5tuple(const struct flow *flow, uint32_t basis)
1240 uint32_t hash = basis;
1243 hash = hash_add(hash, flow->nw_proto);
1245 if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1246 const uint64_t *flow_u64 = (const uint64_t *)flow;
1247 int ofs = offsetof(struct flow, ipv6_src) / 8;
1248 int end = ofs + 2 * sizeof flow->ipv6_src / 8;
1250 for (;ofs < end; ofs++) {
1251 hash = hash_add64(hash, flow_u64[ofs]);
1254 hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_src);
1255 hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst);
1257 /* Add both ports at once. */
1258 hash = hash_add(hash,
1259 ((const uint32_t *)flow)[offsetof(struct flow, tp_src)
1260 / sizeof(uint32_t)]);
1261 hash = hash_finish(hash, 42); /* Arbitrary number. */
1266 /* Hashes 'flow' based on its L2 through L4 protocol information. */
1268 flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis)
1273 struct in6_addr ipv6_addr;
1278 uint8_t eth_addr[ETH_ADDR_LEN];
1284 memset(&fields, 0, sizeof fields);
1285 for (i = 0; i < ETH_ADDR_LEN; i++) {
1286 fields.eth_addr[i] = flow->dl_src[i] ^ flow->dl_dst[i];
1288 fields.vlan_tci = flow->vlan_tci & htons(VLAN_VID_MASK);
1289 fields.eth_type = flow->dl_type;
1291 /* UDP source and destination port are not taken into account because they
1292 * will not necessarily be symmetric in a bidirectional flow. */
1293 if (fields.eth_type == htons(ETH_TYPE_IP)) {
1294 fields.ipv4_addr = flow->nw_src ^ flow->nw_dst;
1295 fields.ip_proto = flow->nw_proto;
1296 if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) {
1297 fields.tp_port = flow->tp_src ^ flow->tp_dst;
1299 } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) {
1300 const uint8_t *a = &flow->ipv6_src.s6_addr[0];
1301 const uint8_t *b = &flow->ipv6_dst.s6_addr[0];
1302 uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0];
1304 for (i=0; i<16; i++) {
1305 ipv6_addr[i] = a[i] ^ b[i];
1307 fields.ip_proto = flow->nw_proto;
1308 if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) {
1309 fields.tp_port = flow->tp_src ^ flow->tp_dst;
1312 return jhash_bytes(&fields, sizeof fields, basis);
1315 /* Initialize a flow with random fields that matter for nx_hash_fields. */
1317 flow_random_hash_fields(struct flow *flow)
1319 uint16_t rnd = random_uint16();
1321 /* Initialize to all zeros. */
1322 memset(flow, 0, sizeof *flow);
1324 eth_addr_random(flow->dl_src);
1325 eth_addr_random(flow->dl_dst);
1327 flow->vlan_tci = (OVS_FORCE ovs_be16) (random_uint16() & VLAN_VID_MASK);
1329 /* Make most of the random flows IPv4, some IPv6, and rest random. */
1330 flow->dl_type = rnd < 0x8000 ? htons(ETH_TYPE_IP) :
1331 rnd < 0xc000 ? htons(ETH_TYPE_IPV6) : (OVS_FORCE ovs_be16)rnd;
1333 if (dl_type_is_ip_any(flow->dl_type)) {
1334 if (flow->dl_type == htons(ETH_TYPE_IP)) {
1335 flow->nw_src = (OVS_FORCE ovs_be32)random_uint32();
1336 flow->nw_dst = (OVS_FORCE ovs_be32)random_uint32();
1338 random_bytes(&flow->ipv6_src, sizeof flow->ipv6_src);
1339 random_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst);
1341 /* Make most of IP flows TCP, some UDP or SCTP, and rest random. */
1342 rnd = random_uint16();
1343 flow->nw_proto = rnd < 0x8000 ? IPPROTO_TCP :
1344 rnd < 0xc000 ? IPPROTO_UDP :
1345 rnd < 0xd000 ? IPPROTO_SCTP : (uint8_t)rnd;
1346 if (flow->nw_proto == IPPROTO_TCP ||
1347 flow->nw_proto == IPPROTO_UDP ||
1348 flow->nw_proto == IPPROTO_SCTP) {
1349 flow->tp_src = (OVS_FORCE ovs_be16)random_uint16();
1350 flow->tp_dst = (OVS_FORCE ovs_be16)random_uint16();
1355 /* Masks the fields in 'wc' that are used by the flow hash 'fields'. */
1357 flow_mask_hash_fields(const struct flow *flow, struct flow_wildcards *wc,
1358 enum nx_hash_fields fields)
1361 case NX_HASH_FIELDS_ETH_SRC:
1362 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1365 case NX_HASH_FIELDS_SYMMETRIC_L4:
1366 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1367 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1368 if (flow->dl_type == htons(ETH_TYPE_IP)) {
1369 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1370 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1371 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1372 memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src);
1373 memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst);
1375 if (is_ip_any(flow)) {
1376 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1377 flow_unwildcard_tp_ports(flow, wc);
1379 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1387 /* Hashes the portions of 'flow' designated by 'fields'. */
1389 flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields,
1394 case NX_HASH_FIELDS_ETH_SRC:
1395 return jhash_bytes(flow->dl_src, sizeof flow->dl_src, basis);
1397 case NX_HASH_FIELDS_SYMMETRIC_L4:
1398 return flow_hash_symmetric_l4(flow, basis);
1404 /* Returns a string representation of 'fields'. */
1406 flow_hash_fields_to_str(enum nx_hash_fields fields)
1409 case NX_HASH_FIELDS_ETH_SRC: return "eth_src";
1410 case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4";
1411 default: return "<unknown>";
1415 /* Returns true if the value of 'fields' is supported. Otherwise false. */
1417 flow_hash_fields_valid(enum nx_hash_fields fields)
1419 return fields == NX_HASH_FIELDS_ETH_SRC
1420 || fields == NX_HASH_FIELDS_SYMMETRIC_L4;
1423 /* Returns a hash value for the bits of 'flow' that are active based on
1424 * 'wc', given 'basis'. */
1426 flow_hash_in_wildcards(const struct flow *flow,
1427 const struct flow_wildcards *wc, uint32_t basis)
1429 const uint64_t *wc_u64 = (const uint64_t *) &wc->masks;
1430 const uint64_t *flow_u64 = (const uint64_t *) flow;
1435 for (i = 0; i < FLOW_U64S; i++) {
1436 hash = hash_add64(hash, flow_u64[i] & wc_u64[i]);
1438 return hash_finish(hash, 8 * FLOW_U64S);
1441 /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an
1442 * OpenFlow 1.0 "dl_vlan" value:
1444 * - If it is in the range 0...4095, 'flow->vlan_tci' is set to match
1445 * that VLAN. Any existing PCP match is unchanged (it becomes 0 if
1446 * 'flow' previously matched packets without a VLAN header).
1448 * - If it is OFP_VLAN_NONE, 'flow->vlan_tci' is set to match a packet
1449 * without a VLAN tag.
1451 * - Other values of 'vid' should not be used. */
1453 flow_set_dl_vlan(struct flow *flow, ovs_be16 vid)
1455 if (vid == htons(OFP10_VLAN_NONE)) {
1456 flow->vlan_tci = htons(0);
1458 vid &= htons(VLAN_VID_MASK);
1459 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
1460 flow->vlan_tci |= htons(VLAN_CFI) | vid;
1464 /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an
1465 * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID
1468 flow_set_vlan_vid(struct flow *flow, ovs_be16 vid)
1470 ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI);
1471 flow->vlan_tci &= ~mask;
1472 flow->vlan_tci |= vid & mask;
1475 /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the
1478 * This function has no effect on the VLAN ID that 'flow' matches.
1480 * After calling this function, 'flow' will not match packets without a VLAN
1483 flow_set_vlan_pcp(struct flow *flow, uint8_t pcp)
1486 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
1487 flow->vlan_tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
1490 /* Returns the number of MPLS LSEs present in 'flow'
1492 * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type.
1493 * Otherwise traverses 'flow''s MPLS label stack stopping at the
1494 * first entry that has the BoS bit set. If no such entry exists then
1495 * the maximum number of LSEs that can be stored in 'flow' is returned.
1498 flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc)
1500 /* dl_type is always masked. */
1501 if (eth_type_mpls(flow->dl_type)) {
1506 for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) {
1508 wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK);
1510 if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) {
1513 if (flow->mpls_lse[i]) {
1523 /* Returns the number consecutive of MPLS LSEs, starting at the
1524 * innermost LSE, that are common in 'a' and 'b'.
1526 * 'an' must be flow_count_mpls_labels(a).
1527 * 'bn' must be flow_count_mpls_labels(b).
1530 flow_count_common_mpls_labels(const struct flow *a, int an,
1531 const struct flow *b, int bn,
1532 struct flow_wildcards *wc)
1534 int min_n = MIN(an, bn);
1539 int a_last = an - 1;
1540 int b_last = bn - 1;
1543 for (i = 0; i < min_n; i++) {
1545 wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX;
1546 wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX;
1548 if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) {
1559 /* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type
1560 * to 'mpls_eth_type', which must be an MPLS Ethertype.
1562 * If the new label is the first MPLS label in 'flow', it is generated as;
1564 * - label: 2, if 'flow' is IPv6, otherwise 0.
1566 * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64.
1568 * - TC: IPv4 or IPv6 TOS, if present, otherwise 0.
1572 * If the new label is the second or later label MPLS label in 'flow', it is
1575 * - label: Copied from outer label.
1577 * - TTL: Copied from outer label.
1579 * - TC: Copied from outer label.
1583 * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than
1584 * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow).
1587 flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type,
1588 struct flow_wildcards *wc)
1590 ovs_assert(eth_type_mpls(mpls_eth_type));
1591 ovs_assert(n < FLOW_MAX_MPLS_LABELS);
1597 memset(&wc->masks.mpls_lse, 0xff, sizeof *wc->masks.mpls_lse * n);
1599 for (i = n; i >= 1; i--) {
1600 flow->mpls_lse[i] = flow->mpls_lse[i - 1];
1602 flow->mpls_lse[0] = (flow->mpls_lse[1] & htonl(~MPLS_BOS_MASK));
1604 int label = 0; /* IPv4 Explicit Null. */
1608 if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1612 if (is_ip_any(flow)) {
1613 tc = (flow->nw_tos & IP_DSCP_MASK) >> 2;
1615 wc->masks.nw_tos |= IP_DSCP_MASK;
1616 wc->masks.nw_ttl = 0xff;
1624 flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label));
1626 /* Clear all L3 and L4 fields and dp_hash. */
1627 BUILD_ASSERT(FLOW_WC_SEQ == 31);
1628 memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0,
1629 sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT);
1632 flow->dl_type = mpls_eth_type;
1635 /* Tries to remove the outermost MPLS label from 'flow'. Returns true if
1636 * successful, false otherwise. On success, sets 'flow''s Ethernet type to
1639 * 'n' must be flow_count_mpls_labels(flow). */
1641 flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type,
1642 struct flow_wildcards *wc)
1647 /* Nothing to pop. */
1649 } else if (n == FLOW_MAX_MPLS_LABELS) {
1651 wc->masks.mpls_lse[n - 1] |= htonl(MPLS_BOS_MASK);
1653 if (!(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) {
1654 /* Can't pop because don't know what to fill in mpls_lse[n - 1]. */
1660 memset(&wc->masks.mpls_lse[1], 0xff,
1661 sizeof *wc->masks.mpls_lse * (n - 1));
1663 for (i = 1; i < n; i++) {
1664 flow->mpls_lse[i - 1] = flow->mpls_lse[i];
1666 flow->mpls_lse[n - 1] = 0;
1667 flow->dl_type = eth_type;
1671 /* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted
1672 * as an OpenFlow 1.1 "mpls_label" value. */
1674 flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label)
1676 set_mpls_lse_label(&flow->mpls_lse[idx], label);
1679 /* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the
1682 flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl)
1684 set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl);
1687 /* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the
1690 flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc)
1692 set_mpls_lse_tc(&flow->mpls_lse[idx], tc);
1695 /* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */
1697 flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos)
1699 set_mpls_lse_bos(&flow->mpls_lse[idx], bos);
1702 /* Sets the entire MPLS LSE. */
1704 flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse)
1706 flow->mpls_lse[idx] = lse;
1710 flow_compose_l4(struct ofpbuf *b, const struct flow *flow)
1714 if (!(flow->nw_frag & FLOW_NW_FRAG_ANY)
1715 || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
1716 if (flow->nw_proto == IPPROTO_TCP) {
1717 struct tcp_header *tcp;
1719 l4_len = sizeof *tcp;
1720 tcp = ofpbuf_put_zeros(b, l4_len);
1721 tcp->tcp_src = flow->tp_src;
1722 tcp->tcp_dst = flow->tp_dst;
1723 tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5);
1724 } else if (flow->nw_proto == IPPROTO_UDP) {
1725 struct udp_header *udp;
1727 l4_len = sizeof *udp;
1728 udp = ofpbuf_put_zeros(b, l4_len);
1729 udp->udp_src = flow->tp_src;
1730 udp->udp_dst = flow->tp_dst;
1731 } else if (flow->nw_proto == IPPROTO_SCTP) {
1732 struct sctp_header *sctp;
1734 l4_len = sizeof *sctp;
1735 sctp = ofpbuf_put_zeros(b, l4_len);
1736 sctp->sctp_src = flow->tp_src;
1737 sctp->sctp_dst = flow->tp_dst;
1738 } else if (flow->nw_proto == IPPROTO_ICMP) {
1739 struct icmp_header *icmp;
1741 l4_len = sizeof *icmp;
1742 icmp = ofpbuf_put_zeros(b, l4_len);
1743 icmp->icmp_type = ntohs(flow->tp_src);
1744 icmp->icmp_code = ntohs(flow->tp_dst);
1745 icmp->icmp_csum = csum(icmp, ICMP_HEADER_LEN);
1746 } else if (flow->nw_proto == IPPROTO_IGMP) {
1747 struct igmp_header *igmp;
1749 l4_len = sizeof *igmp;
1750 igmp = ofpbuf_put_zeros(b, l4_len);
1751 igmp->igmp_type = ntohs(flow->tp_src);
1752 igmp->igmp_code = ntohs(flow->tp_dst);
1753 put_16aligned_be32(&igmp->group, flow->igmp_group_ip4);
1754 igmp->igmp_csum = csum(igmp, IGMP_HEADER_LEN);
1755 } else if (flow->nw_proto == IPPROTO_ICMPV6) {
1756 struct icmp6_hdr *icmp;
1758 l4_len = sizeof *icmp;
1759 icmp = ofpbuf_put_zeros(b, l4_len);
1760 icmp->icmp6_type = ntohs(flow->tp_src);
1761 icmp->icmp6_code = ntohs(flow->tp_dst);
1763 if (icmp->icmp6_code == 0 &&
1764 (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
1765 icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) {
1766 struct in6_addr *nd_target;
1767 struct nd_opt_hdr *nd_opt;
1769 l4_len += sizeof *nd_target;
1770 nd_target = ofpbuf_put_zeros(b, sizeof *nd_target);
1771 *nd_target = flow->nd_target;
1773 if (!eth_addr_is_zero(flow->arp_sha)) {
1775 nd_opt = ofpbuf_put_zeros(b, 8);
1776 nd_opt->nd_opt_len = 1;
1777 nd_opt->nd_opt_type = ND_OPT_SOURCE_LINKADDR;
1778 memcpy(nd_opt + 1, flow->arp_sha, ETH_ADDR_LEN);
1780 if (!eth_addr_is_zero(flow->arp_tha)) {
1782 nd_opt = ofpbuf_put_zeros(b, 8);
1783 nd_opt->nd_opt_len = 1;
1784 nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR;
1785 memcpy(nd_opt + 1, flow->arp_tha, ETH_ADDR_LEN);
1788 icmp->icmp6_cksum = (OVS_FORCE uint16_t)
1789 csum(icmp, (char *)ofpbuf_tail(b) - (char *)icmp);
1795 /* Puts into 'b' a packet that flow_extract() would parse as having the given
1798 * (This is useful only for testing, obviously, and the packet isn't really
1799 * valid. It hasn't got some checksums filled in, for one, and lots of fields
1800 * are just zeroed.) */
1802 flow_compose(struct ofpbuf *b, const struct flow *flow)
1806 /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */
1807 eth_compose(b, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0);
1808 if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) {
1809 struct eth_header *eth = ofpbuf_l2(b);
1810 eth->eth_type = htons(ofpbuf_size(b));
1814 if (flow->vlan_tci & htons(VLAN_CFI)) {
1815 eth_push_vlan(b, htons(ETH_TYPE_VLAN), flow->vlan_tci);
1818 if (flow->dl_type == htons(ETH_TYPE_IP)) {
1819 struct ip_header *ip;
1821 ip = ofpbuf_put_zeros(b, sizeof *ip);
1822 ip->ip_ihl_ver = IP_IHL_VER(5, 4);
1823 ip->ip_tos = flow->nw_tos;
1824 ip->ip_ttl = flow->nw_ttl;
1825 ip->ip_proto = flow->nw_proto;
1826 put_16aligned_be32(&ip->ip_src, flow->nw_src);
1827 put_16aligned_be32(&ip->ip_dst, flow->nw_dst);
1829 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
1830 ip->ip_frag_off |= htons(IP_MORE_FRAGMENTS);
1831 if (flow->nw_frag & FLOW_NW_FRAG_LATER) {
1832 ip->ip_frag_off |= htons(100);
1836 ofpbuf_set_l4(b, ofpbuf_tail(b));
1838 l4_len = flow_compose_l4(b, flow);
1841 ip->ip_tot_len = htons(b->l4_ofs - b->l3_ofs + l4_len);
1842 ip->ip_csum = csum(ip, sizeof *ip);
1843 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1844 struct ovs_16aligned_ip6_hdr *nh;
1846 nh = ofpbuf_put_zeros(b, sizeof *nh);
1847 put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) |
1848 htonl(flow->nw_tos << 20) | flow->ipv6_label);
1849 nh->ip6_hlim = flow->nw_ttl;
1850 nh->ip6_nxt = flow->nw_proto;
1852 memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src));
1853 memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst));
1855 ofpbuf_set_l4(b, ofpbuf_tail(b));
1857 l4_len = flow_compose_l4(b, flow);
1860 nh->ip6_plen = htons(l4_len);
1861 } else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
1862 flow->dl_type == htons(ETH_TYPE_RARP)) {
1863 struct arp_eth_header *arp;
1865 arp = ofpbuf_put_zeros(b, sizeof *arp);
1866 ofpbuf_set_l3(b, arp);
1867 arp->ar_hrd = htons(1);
1868 arp->ar_pro = htons(ETH_TYPE_IP);
1869 arp->ar_hln = ETH_ADDR_LEN;
1871 arp->ar_op = htons(flow->nw_proto);
1873 if (flow->nw_proto == ARP_OP_REQUEST ||
1874 flow->nw_proto == ARP_OP_REPLY) {
1875 put_16aligned_be32(&arp->ar_spa, flow->nw_src);
1876 put_16aligned_be32(&arp->ar_tpa, flow->nw_dst);
1877 memcpy(arp->ar_sha, flow->arp_sha, ETH_ADDR_LEN);
1878 memcpy(arp->ar_tha, flow->arp_tha, ETH_ADDR_LEN);
1882 if (eth_type_mpls(flow->dl_type)) {
1885 b->l2_5_ofs = b->l3_ofs;
1886 for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) {
1887 if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) {
1892 push_mpls(b, flow->dl_type, flow->mpls_lse[--n]);
1897 /* Compressed flow. */
1900 miniflow_n_values(const struct miniflow *flow)
1902 return count_1bits(flow->map);
1906 miniflow_alloc_values(struct miniflow *flow, int n)
1908 int size = MINIFLOW_VALUES_SIZE(n);
1910 if (size <= sizeof flow->inline_values) {
1911 flow->values_inline = true;
1912 return flow->inline_values;
1914 COVERAGE_INC(miniflow_malloc);
1915 flow->values_inline = false;
1916 flow->offline_values = xmalloc(size);
1917 return flow->offline_values;
1921 /* Completes an initialization of 'dst' as a miniflow copy of 'src' begun by
1922 * the caller. The caller must have already initialized 'dst->map' properly
1923 * to indicate the significant uint64_t elements of 'src'. 'n' must be the
1924 * number of 1-bits in 'dst->map'.
1926 * Normally the significant elements are the ones that are non-zero. However,
1927 * when a miniflow is initialized from a (mini)mask, the values can be zeroes,
1928 * so that the flow and mask always have the same maps.
1930 * This function initializes values (either inline if possible or with
1931 * malloc() otherwise) and copies the uint64_t elements of 'src' indicated by
1932 * 'dst->map' into it. */
1934 miniflow_init__(struct miniflow *dst, const struct flow *src, int n)
1936 const uint64_t *src_u64 = (const uint64_t *) src;
1937 uint64_t *dst_u64 = miniflow_alloc_values(dst, n);
1940 MAP_FOR_EACH_INDEX(idx, dst->map) {
1941 *dst_u64++ = src_u64[idx];
1945 /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst'
1946 * with miniflow_destroy().
1947 * Always allocates offline storage. */
1949 miniflow_init(struct miniflow *dst, const struct flow *src)
1951 const uint64_t *src_u64 = (const uint64_t *) src;
1955 /* Initialize dst->map, counting the number of nonzero elements. */
1959 for (i = 0; i < FLOW_U64S; i++) {
1961 dst->map |= UINT64_C(1) << i;
1966 miniflow_init__(dst, src, n);
1969 /* Initializes 'dst' as a copy of 'src', using 'mask->map' as 'dst''s map. The
1970 * caller must eventually free 'dst' with miniflow_destroy(). */
1972 miniflow_init_with_minimask(struct miniflow *dst, const struct flow *src,
1973 const struct minimask *mask)
1975 dst->map = mask->masks.map;
1976 miniflow_init__(dst, src, miniflow_n_values(dst));
1979 /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst'
1980 * with miniflow_destroy(). */
1982 miniflow_clone(struct miniflow *dst, const struct miniflow *src)
1984 int size = MINIFLOW_VALUES_SIZE(miniflow_n_values(src));
1987 dst->map = src->map;
1988 if (size <= sizeof dst->inline_values) {
1989 dst->values_inline = true;
1990 values = dst->inline_values;
1992 dst->values_inline = false;
1993 COVERAGE_INC(miniflow_malloc);
1994 dst->offline_values = xmalloc(size);
1995 values = dst->offline_values;
1997 memcpy(values, miniflow_get_values(src), size);
2000 /* Initializes 'dst' as a copy of 'src'. The caller must have allocated
2001 * 'dst' to have inline space all data in 'src'. */
2003 miniflow_clone_inline(struct miniflow *dst, const struct miniflow *src,
2006 dst->values_inline = true;
2007 dst->map = src->map;
2008 memcpy(dst->inline_values, miniflow_get_values(src),
2009 MINIFLOW_VALUES_SIZE(n_values));
2012 /* Initializes 'dst' with the data in 'src', destroying 'src'.
2013 * The caller must eventually free 'dst' with miniflow_destroy().
2014 * 'dst' must be regularly sized miniflow, but 'src' can have
2015 * storage for more than the default MINI_N_INLINE inline
2018 miniflow_move(struct miniflow *dst, struct miniflow *src)
2020 int size = MINIFLOW_VALUES_SIZE(miniflow_n_values(src));
2022 dst->map = src->map;
2023 if (size <= sizeof dst->inline_values) {
2024 dst->values_inline = true;
2025 memcpy(dst->inline_values, miniflow_get_values(src), size);
2026 miniflow_destroy(src);
2027 } else if (src->values_inline) {
2028 dst->values_inline = false;
2029 COVERAGE_INC(miniflow_malloc);
2030 dst->offline_values = xmalloc(size);
2031 memcpy(dst->offline_values, src->inline_values, size);
2033 dst->values_inline = false;
2034 dst->offline_values = src->offline_values;
2038 /* Frees any memory owned by 'flow'. Does not free the storage in which 'flow'
2039 * itself resides; the caller is responsible for that. */
2041 miniflow_destroy(struct miniflow *flow)
2043 if (!flow->values_inline) {
2044 free(flow->offline_values);
2048 /* Initializes 'dst' as a copy of 'src'. */
2050 miniflow_expand(const struct miniflow *src, struct flow *dst)
2052 memset(dst, 0, sizeof *dst);
2053 flow_union_with_miniflow(dst, src);
2056 /* Returns true if 'a' and 'b' are the equal miniflow, false otherwise. */
2058 miniflow_equal(const struct miniflow *a, const struct miniflow *b)
2060 const uint64_t *ap = miniflow_get_values(a);
2061 const uint64_t *bp = miniflow_get_values(b);
2063 if (OVS_LIKELY(a->map == b->map)) {
2064 int count = miniflow_n_values(a);
2066 return !memcmp(ap, bp, count * sizeof *ap);
2070 for (map = a->map | b->map; map; map = zero_rightmost_1bit(map)) {
2071 uint64_t bit = rightmost_1bit(map);
2073 if ((a->map & bit ? *ap++ : 0) != (b->map & bit ? *bp++ : 0)) {
2082 /* Returns false if 'a' and 'b' differ at the places where there are 1-bits
2083 * in 'mask', true otherwise. */
2085 miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b,
2086 const struct minimask *mask)
2088 const uint64_t *p = miniflow_get_values(&mask->masks);
2091 MAP_FOR_EACH_INDEX(idx, mask->masks.map) {
2092 if ((miniflow_get(a, idx) ^ miniflow_get(b, idx)) & *p++) {
2100 /* Returns true if 'a' and 'b' are equal at the places where there are 1-bits
2101 * in 'mask', false if they differ. */
2103 miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b,
2104 const struct minimask *mask)
2106 const uint64_t *b_u64 = (const uint64_t *) b;
2107 const uint64_t *p = miniflow_get_values(&mask->masks);
2110 MAP_FOR_EACH_INDEX(idx, mask->masks.map) {
2111 if ((miniflow_get(a, idx) ^ b_u64[idx]) & *p++) {
2120 /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst'
2121 * with minimask_destroy(). */
2123 minimask_init(struct minimask *mask, const struct flow_wildcards *wc)
2125 miniflow_init(&mask->masks, &wc->masks);
2128 /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst'
2129 * with minimask_destroy(). */
2131 minimask_clone(struct minimask *dst, const struct minimask *src)
2133 miniflow_clone(&dst->masks, &src->masks);
2136 /* Initializes 'dst' with the data in 'src', destroying 'src'.
2137 * The caller must eventually free 'dst' with minimask_destroy(). */
2139 minimask_move(struct minimask *dst, struct minimask *src)
2141 miniflow_move(&dst->masks, &src->masks);
2144 /* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'.
2146 * The caller must provide room for FLOW_U64S "uint64_t"s in 'storage', for use
2147 * by 'dst_'. The caller must *not* free 'dst_' with minimask_destroy(). */
2149 minimask_combine(struct minimask *dst_,
2150 const struct minimask *a_, const struct minimask *b_,
2151 uint64_t storage[FLOW_U64S])
2153 struct miniflow *dst = &dst_->masks;
2154 uint64_t *dst_values = storage;
2155 const struct miniflow *a = &a_->masks;
2156 const struct miniflow *b = &b_->masks;
2159 dst->values_inline = false;
2160 dst->offline_values = storage;
2163 MAP_FOR_EACH_INDEX(idx, a->map & b->map) {
2164 /* Both 'a' and 'b' have non-zero data at 'idx'. */
2165 uint64_t mask = miniflow_get__(a, idx) & miniflow_get__(b, idx);
2168 dst->map |= UINT64_C(1) << idx;
2169 *dst_values++ = mask;
2174 /* Frees any memory owned by 'mask'. Does not free the storage in which 'mask'
2175 * itself resides; the caller is responsible for that. */
2177 minimask_destroy(struct minimask *mask)
2179 miniflow_destroy(&mask->masks);
2182 /* Initializes 'dst' as a copy of 'src'. */
2184 minimask_expand(const struct minimask *mask, struct flow_wildcards *wc)
2186 miniflow_expand(&mask->masks, &wc->masks);
2189 /* Returns true if 'a' and 'b' are the same flow mask, false otherwise.
2190 * Minimasks may not have zero data values, so for the minimasks to be the
2191 * same, they need to have the same map and the same data values. */
2193 minimask_equal(const struct minimask *a, const struct minimask *b)
2195 return a->masks.map == b->masks.map &&
2196 !memcmp(miniflow_get_values(&a->masks),
2197 miniflow_get_values(&b->masks),
2198 count_1bits(a->masks.map) * sizeof *a->masks.inline_values);
2201 /* Returns true if at least one bit matched by 'b' is wildcarded by 'a',
2202 * false otherwise. */
2204 minimask_has_extra(const struct minimask *a, const struct minimask *b)
2206 const uint64_t *ap = miniflow_get_values(&a->masks);
2207 const uint64_t *bp = miniflow_get_values(&b->masks);
2210 MAP_FOR_EACH_INDEX(idx, b->masks.map) {
2211 uint64_t b_u64 = *bp++;
2213 /* 'b_u64' is non-zero, check if the data in 'a' is either zero
2214 * or misses some of the bits in 'b_u64'. */
2215 if (!(a->masks.map & (UINT64_C(1) << idx))
2216 || ((miniflow_values_get__(ap, a->masks.map, idx) & b_u64)
2218 return true; /* 'a' wildcards some bits 'b' doesn't. */