2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 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.
21 #include <sys/types.h>
22 #include <netinet/in.h>
27 #include "openvswitch/types.h"
34 /* Datapath packet metadata */
36 uint32_t recirc_id; /* Recirculation id carried with the
37 recirculating packets. 0 for packets
38 received from the wire. */
39 uint32_t dp_hash; /* hash value computed by the recirculation
41 struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */
42 uint32_t skb_priority; /* Packet priority for QoS. */
43 uint32_t pkt_mark; /* Packet mark. */
44 union flow_in_port in_port; /* Input port. */
47 #define PKT_METADATA_INITIALIZER(PORT) \
48 (struct pkt_metadata){ 0, 0, { 0, 0, 0, 0, 0, 0}, 0, 0, {(PORT)} }
50 static inline struct pkt_metadata
51 pkt_metadata_from_flow(const struct flow *flow)
53 struct pkt_metadata md;
55 md.recirc_id = flow->recirc_id;
56 md.dp_hash = flow->dp_hash;
57 md.tunnel = flow->tunnel;
58 md.skb_priority = flow->skb_priority;
59 md.pkt_mark = flow->pkt_mark;
60 md.in_port = flow->in_port;
65 bool dpid_from_string(const char *s, uint64_t *dpidp);
67 #define ETH_ADDR_LEN 6
69 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED
70 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
72 static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED
73 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
75 static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED
76 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 };
78 static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED
79 = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 };
81 static inline bool eth_addr_is_broadcast(const uint8_t ea[6])
83 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
86 static inline bool eth_addr_is_multicast(const uint8_t ea[6])
90 static inline bool eth_addr_is_local(const uint8_t ea[6])
92 /* Local if it is either a locally administered address or a Nicira random
95 || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80);
97 static inline bool eth_addr_is_zero(const uint8_t ea[6])
99 return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
102 static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN])
104 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
107 static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN],
108 const uint8_t b[ETH_ADDR_LEN])
110 return memcmp(a, b, ETH_ADDR_LEN);
112 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
113 const uint8_t b[ETH_ADDR_LEN])
115 return !eth_addr_compare_3way(a, b);
117 static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN],
118 const uint8_t b[ETH_ADDR_LEN],
119 const uint8_t mask[ETH_ADDR_LEN])
121 return !(((a[0] ^ b[0]) & mask[0])
122 || ((a[1] ^ b[1]) & mask[1])
123 || ((a[2] ^ b[2]) & mask[2])
124 || ((a[3] ^ b[3]) & mask[3])
125 || ((a[4] ^ b[4]) & mask[4])
126 || ((a[5] ^ b[5]) & mask[5]));
128 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
130 return (((uint64_t) ea[0] << 40)
131 | ((uint64_t) ea[1] << 32)
132 | ((uint64_t) ea[2] << 24)
133 | ((uint64_t) ea[3] << 16)
134 | ((uint64_t) ea[4] << 8)
137 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
146 static inline void eth_addr_mark_random(uint8_t ea[ETH_ADDR_LEN])
148 ea[0] &= ~1; /* Unicast. */
149 ea[0] |= 2; /* Private. */
151 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
153 random_bytes(ea, ETH_ADDR_LEN);
154 eth_addr_mark_random(ea);
156 static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN])
160 /* Set the OUI to the Nicira one. */
165 /* Set the top bit to indicate random Nicira address. */
169 bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]);
170 bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]);
172 void compose_rarp(struct ofpbuf *, const uint8_t eth_src[ETH_ADDR_LEN]);
174 void eth_push_vlan(struct ofpbuf *, ovs_be16 tpid, ovs_be16 tci);
175 void eth_pop_vlan(struct ofpbuf *);
177 const char *eth_from_hex(const char *hex, struct ofpbuf **packetp);
178 void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN],
179 const uint8_t mask[ETH_ADDR_LEN], struct ds *s);
180 void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN],
181 const uint8_t mask[ETH_ADDR_LEN],
182 uint8_t dst[ETH_ADDR_LEN]);
184 void set_mpls_lse(struct ofpbuf *, ovs_be32 label);
185 void push_mpls(struct ofpbuf *packet, ovs_be16 ethtype, ovs_be32 lse);
186 void pop_mpls(struct ofpbuf *, ovs_be16 ethtype);
188 void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl);
189 void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc);
190 void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label);
191 void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos);
192 ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos,
197 * uint8_t mac[ETH_ADDR_LEN];
199 * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
202 #define ETH_ADDR_FMT \
203 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
204 #define ETH_ADDR_ARGS(ea) \
205 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
209 * char *string = "1 00:11:22:33:44:55 2";
210 * uint8_t mac[ETH_ADDR_LEN];
213 * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d",
214 * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) {
218 #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
219 #define ETH_ADDR_SCAN_ARGS(ea) \
220 &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
222 #define ETH_TYPE_IP 0x0800
223 #define ETH_TYPE_ARP 0x0806
224 #define ETH_TYPE_VLAN_8021Q 0x8100
225 #define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q
226 #define ETH_TYPE_VLAN_8021AD 0x88a8
227 #define ETH_TYPE_IPV6 0x86dd
228 #define ETH_TYPE_LACP 0x8809
229 #define ETH_TYPE_RARP 0x8035
230 #define ETH_TYPE_MPLS 0x8847
231 #define ETH_TYPE_MPLS_MCAST 0x8848
233 static inline bool eth_type_mpls(ovs_be16 eth_type)
235 return eth_type == htons(ETH_TYPE_MPLS) ||
236 eth_type == htons(ETH_TYPE_MPLS_MCAST);
239 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
241 #define ETH_TYPE_MIN 0x600
243 #define ETH_HEADER_LEN 14
244 #define ETH_PAYLOAD_MIN 46
245 #define ETH_PAYLOAD_MAX 1500
246 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
247 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
248 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
251 uint8_t eth_dst[ETH_ADDR_LEN];
252 uint8_t eth_src[ETH_ADDR_LEN];
255 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
257 #define LLC_DSAP_SNAP 0xaa
258 #define LLC_SSAP_SNAP 0xaa
259 #define LLC_CNTL_SNAP 3
261 #define LLC_HEADER_LEN 3
268 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
270 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
271 sizeof(SNAP_ORG_ETHERNET) == 3. */
272 #define SNAP_HEADER_LEN 5
278 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
280 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
282 struct llc_snap_header {
283 struct llc_header llc;
284 struct snap_header snap;
286 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
288 #define VLAN_VID_MASK 0x0fff
289 #define VLAN_VID_SHIFT 0
291 #define VLAN_PCP_MASK 0xe000
292 #define VLAN_PCP_SHIFT 13
294 #define VLAN_CFI 0x1000
295 #define VLAN_CFI_SHIFT 12
297 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
298 * returns the VLAN ID in host byte order. */
299 static inline uint16_t
300 vlan_tci_to_vid(ovs_be16 vlan_tci)
302 return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
305 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
306 * returns the priority code point (PCP) in host byte order. */
308 vlan_tci_to_pcp(ovs_be16 vlan_tci)
310 return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
313 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
314 * returns the Canonical Format Indicator (CFI). */
316 vlan_tci_to_cfi(ovs_be16 vlan_tci)
318 return (vlan_tci & htons(VLAN_CFI)) != 0;
321 #define VLAN_HEADER_LEN 4
323 ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */
324 ovs_be16 vlan_next_type;
326 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
328 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
330 struct vlan_eth_header {
331 uint8_t veth_dst[ETH_ADDR_LEN];
332 uint8_t veth_src[ETH_ADDR_LEN];
333 ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */
334 ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */
335 ovs_be16 veth_next_type;
337 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
339 /* MPLS related definitions */
340 #define MPLS_TTL_MASK 0x000000ff
341 #define MPLS_TTL_SHIFT 0
343 #define MPLS_BOS_MASK 0x00000100
344 #define MPLS_BOS_SHIFT 8
346 #define MPLS_TC_MASK 0x00000e00
347 #define MPLS_TC_SHIFT 9
349 #define MPLS_LABEL_MASK 0xfffff000
350 #define MPLS_LABEL_SHIFT 12
357 BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr));
359 /* Given a mpls label stack entry in network byte order
360 * return mpls label in host byte order */
361 static inline uint32_t
362 mpls_lse_to_label(ovs_be32 mpls_lse)
364 return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT;
367 /* Given a mpls label stack entry in network byte order
369 static inline uint8_t
370 mpls_lse_to_tc(ovs_be32 mpls_lse)
372 return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT;
375 /* Given a mpls label stack entry in network byte order
377 static inline uint8_t
378 mpls_lse_to_ttl(ovs_be32 mpls_lse)
380 return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT;
383 /* Set TTL in mpls lse. */
385 flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl)
387 *mpls_lse &= ~htonl(MPLS_TTL_MASK);
388 *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT);
391 /* Given a mpls label stack entry in network byte order
392 * return mpls BoS bit */
393 static inline uint8_t
394 mpls_lse_to_bos(ovs_be32 mpls_lse)
396 return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0;
399 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
400 #define IP_ARGS(ip) \
402 (ntohl(ip) >> 16) & 0xff, \
403 (ntohl(ip) >> 8) & 0xff, \
408 * char *string = "1 33.44.55.66 2";
412 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
416 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
417 #define IP_SCAN_ARGS(ip) \
418 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
419 &((uint8_t *) ip)[1], \
420 &((uint8_t *) ip)[2], \
423 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
424 * high-order 1-bits and 32-N low-order 0-bits. */
426 ip_is_cidr(ovs_be32 netmask)
428 uint32_t x = ~ntohl(netmask);
429 return !(x & (x + 1));
432 ip_is_multicast(ovs_be32 ip)
434 return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
436 int ip_count_cidr_bits(ovs_be32 netmask);
437 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
439 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
440 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
441 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
444 #define IPPROTO_SCTP 132
448 #define IP_ECN_NOT_ECT 0x0
449 #define IP_ECN_ECT_1 0x01
450 #define IP_ECN_ECT_0 0x02
451 #define IP_ECN_CE 0x03
452 #define IP_ECN_MASK 0x03
453 #define IP_DSCP_MASK 0xfc
457 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
458 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
459 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
460 #define IP_IS_FRAGMENT(ip_frag_off) \
461 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
463 #define IP_HEADER_LEN 20
469 ovs_be16 ip_frag_off;
473 ovs_16aligned_be32 ip_src;
474 ovs_16aligned_be32 ip_dst;
476 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
478 #define ICMP_HEADER_LEN 8
492 ovs_16aligned_be32 gateway;
494 uint8_t icmp_data[0];
496 BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header));
498 #define SCTP_HEADER_LEN 12
505 BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header));
507 #define UDP_HEADER_LEN 8
514 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
516 #define TCP_FIN 0x001
517 #define TCP_SYN 0x002
518 #define TCP_RST 0x004
519 #define TCP_PSH 0x008
520 #define TCP_ACK 0x010
521 #define TCP_URG 0x020
522 #define TCP_ECE 0x040
523 #define TCP_CWR 0x080
526 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
527 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
528 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
530 #define TCP_HEADER_LEN 20
534 ovs_16aligned_be32 tcp_seq;
535 ovs_16aligned_be32 tcp_ack;
541 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
543 #define ARP_HRD_ETHERNET 1
544 #define ARP_PRO_IP 0x0800
545 #define ARP_OP_REQUEST 1
546 #define ARP_OP_REPLY 2
547 #define ARP_OP_RARP 3
549 #define ARP_ETH_HEADER_LEN 28
550 struct arp_eth_header {
551 /* Generic members. */
552 ovs_be16 ar_hrd; /* Hardware type. */
553 ovs_be16 ar_pro; /* Protocol type. */
554 uint8_t ar_hln; /* Hardware address length. */
555 uint8_t ar_pln; /* Protocol address length. */
556 ovs_be16 ar_op; /* Opcode. */
558 /* Ethernet+IPv4 specific members. */
559 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
560 ovs_16aligned_be32 ar_spa; /* Sender protocol address. */
561 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
562 ovs_16aligned_be32 ar_tpa; /* Target protocol address. */
564 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
566 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
567 * most implementations, this one only requires 16-bit alignment. */
568 union ovs_16aligned_in6_addr {
570 ovs_16aligned_be32 be32[4];
573 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
574 * one only requires 16-bit alignment. */
575 struct ovs_16aligned_ip6_hdr {
577 struct ovs_16aligned_ip6_hdrctl {
578 ovs_16aligned_be32 ip6_un1_flow;
579 ovs_be16 ip6_un1_plen;
581 uint8_t ip6_un1_hlim;
585 union ovs_16aligned_in6_addr ip6_src;
586 union ovs_16aligned_in6_addr ip6_dst;
589 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
590 * this one only requires 16-bit alignment. */
591 struct ovs_16aligned_ip6_frag {
593 uint8_t ip6f_reserved;
595 ovs_16aligned_be32 ip6f_ident;
598 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
599 #define IPV6_LABEL_MASK 0x000fffff
603 * char *string = "1 ::1 2";
604 * char ipv6_s[IPV6_SCAN_LEN + 1];
605 * struct in6_addr ipv6;
607 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
608 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
612 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
613 #define IPV6_SCAN_LEN 46
615 extern const struct in6_addr in6addr_exact;
616 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
617 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
619 static inline bool ipv6_addr_equals(const struct in6_addr *a,
620 const struct in6_addr *b)
622 #ifdef IN6_ARE_ADDR_EQUAL
623 return IN6_ARE_ADDR_EQUAL(a, b);
625 return !memcmp(a, b, sizeof(*a));
629 static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
630 return ipv6_addr_equals(mask, &in6addr_any);
633 static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
634 return ipv6_addr_equals(mask, &in6addr_exact);
637 static inline bool dl_type_is_ip_any(ovs_be16 dl_type)
639 return dl_type == htons(ETH_TYPE_IP)
640 || dl_type == htons(ETH_TYPE_IPV6);
643 static inline bool is_ip_any(const struct flow *flow)
645 return dl_type_is_ip_any(flow->dl_type);
648 static inline bool is_icmpv4(const struct flow *flow)
650 return (flow->dl_type == htons(ETH_TYPE_IP)
651 && flow->nw_proto == IPPROTO_ICMP);
654 static inline bool is_icmpv6(const struct flow *flow)
656 return (flow->dl_type == htons(ETH_TYPE_IPV6)
657 && flow->nw_proto == IPPROTO_ICMPV6);
660 void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
661 void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
662 void print_ipv6_masked(struct ds *string, const struct in6_addr *addr,
663 const struct in6_addr *mask);
664 struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
665 const struct in6_addr *mask);
666 struct in6_addr ipv6_create_mask(int mask);
667 int ipv6_count_cidr_bits(const struct in6_addr *netmask);
668 bool ipv6_is_cidr(const struct in6_addr *netmask);
670 void *eth_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
671 const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
673 void *snap_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
674 const uint8_t eth_src[ETH_ADDR_LEN],
675 unsigned int oui, uint16_t snap_type, size_t size);
676 void packet_set_ipv4(struct ofpbuf *, ovs_be32 src, ovs_be32 dst, uint8_t tos,
678 void packet_set_ipv6(struct ofpbuf *, uint8_t proto, const ovs_be32 src[4],
679 const ovs_be32 dst[4], uint8_t tc,
680 ovs_be32 fl, uint8_t hlmit);
681 void packet_set_tcp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
682 void packet_set_udp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
683 void packet_set_sctp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
685 void packet_format_tcp_flags(struct ds *, uint16_t);
686 const char *packet_tcp_flag_to_string(uint32_t flag);
688 #endif /* packets.h */