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>
26 #include "openvswitch/types.h"
34 /* Tunnel information used in flow key and metadata. */
44 /* Unfortunately, a "struct flow" sometimes has to handle OpenFlow port
45 * numbers and other times datapath (dpif) port numbers. This union allows
52 /* Datapath packet metadata */
54 uint32_t recirc_id; /* Recirculation id carried with the
55 recirculating packets. 0 for packets
56 received from the wire. */
57 uint32_t dp_hash; /* hash value computed by the recirculation
59 struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */
60 uint32_t skb_priority; /* Packet priority for QoS. */
61 uint32_t pkt_mark; /* Packet mark. */
62 union flow_in_port in_port; /* Input port. */
65 #define PKT_METADATA_INITIALIZER(PORT) \
66 (struct pkt_metadata){ 0, 0, { 0, 0, 0, 0, 0, 0}, 0, 0, {(PORT)} }
68 bool dpid_from_string(const char *s, uint64_t *dpidp);
70 #define ETH_ADDR_LEN 6
72 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED
73 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
75 static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED
76 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
78 static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED
79 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 };
81 static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED
82 = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 };
84 static inline bool eth_addr_is_broadcast(const uint8_t ea[6])
86 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
89 static inline bool eth_addr_is_multicast(const uint8_t ea[6])
93 static inline bool eth_addr_is_local(const uint8_t ea[6])
95 /* Local if it is either a locally administered address or a Nicira random
98 || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80);
100 static inline bool eth_addr_is_zero(const uint8_t ea[6])
102 return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
105 static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN])
107 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
110 static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN],
111 const uint8_t b[ETH_ADDR_LEN])
113 return memcmp(a, b, ETH_ADDR_LEN);
115 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
116 const uint8_t b[ETH_ADDR_LEN])
118 return !eth_addr_compare_3way(a, b);
120 static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN],
121 const uint8_t b[ETH_ADDR_LEN],
122 const uint8_t mask[ETH_ADDR_LEN])
124 return !(((a[0] ^ b[0]) & mask[0])
125 || ((a[1] ^ b[1]) & mask[1])
126 || ((a[2] ^ b[2]) & mask[2])
127 || ((a[3] ^ b[3]) & mask[3])
128 || ((a[4] ^ b[4]) & mask[4])
129 || ((a[5] ^ b[5]) & mask[5]));
131 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
133 return (((uint64_t) ea[0] << 40)
134 | ((uint64_t) ea[1] << 32)
135 | ((uint64_t) ea[2] << 24)
136 | ((uint64_t) ea[3] << 16)
137 | ((uint64_t) ea[4] << 8)
140 static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN],
143 return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea));
145 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
154 static inline void eth_addr_mark_random(uint8_t ea[ETH_ADDR_LEN])
156 ea[0] &= ~1; /* Unicast. */
157 ea[0] |= 2; /* Private. */
159 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
161 random_bytes(ea, ETH_ADDR_LEN);
162 eth_addr_mark_random(ea);
164 static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN])
168 /* Set the OUI to the Nicira one. */
173 /* Set the top bit to indicate random Nicira address. */
176 static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN],
177 const uint16_t vlan, const uint32_t basis)
179 return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis);
182 bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]);
183 bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]);
185 void compose_rarp(struct ofpbuf *, const uint8_t eth_src[ETH_ADDR_LEN]);
187 void eth_push_vlan(struct ofpbuf *, ovs_be16 tpid, ovs_be16 tci);
188 void eth_pop_vlan(struct ofpbuf *);
190 const char *eth_from_hex(const char *hex, struct ofpbuf **packetp);
191 void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN],
192 const uint8_t mask[ETH_ADDR_LEN], struct ds *s);
193 void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN],
194 const uint8_t mask[ETH_ADDR_LEN],
195 uint8_t dst[ETH_ADDR_LEN]);
197 void set_mpls_lse(struct ofpbuf *, ovs_be32 label);
198 void push_mpls(struct ofpbuf *packet, ovs_be16 ethtype, ovs_be32 lse);
199 void pop_mpls(struct ofpbuf *, ovs_be16 ethtype);
201 void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl);
202 void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc);
203 void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label);
204 void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos);
205 ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos,
210 * uint8_t mac[ETH_ADDR_LEN];
212 * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
215 #define ETH_ADDR_FMT \
216 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
217 #define ETH_ADDR_ARGS(ea) \
218 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
222 * char *string = "1 00:11:22:33:44:55 2";
223 * uint8_t mac[ETH_ADDR_LEN];
226 * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d",
227 * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) {
231 #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
232 #define ETH_ADDR_SCAN_ARGS(ea) \
233 &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
235 #define ETH_TYPE_IP 0x0800
236 #define ETH_TYPE_ARP 0x0806
237 #define ETH_TYPE_VLAN_8021Q 0x8100
238 #define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q
239 #define ETH_TYPE_VLAN_8021AD 0x88a8
240 #define ETH_TYPE_IPV6 0x86dd
241 #define ETH_TYPE_LACP 0x8809
242 #define ETH_TYPE_RARP 0x8035
243 #define ETH_TYPE_MPLS 0x8847
244 #define ETH_TYPE_MPLS_MCAST 0x8848
246 static inline bool eth_type_mpls(ovs_be16 eth_type)
248 return eth_type == htons(ETH_TYPE_MPLS) ||
249 eth_type == htons(ETH_TYPE_MPLS_MCAST);
252 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
254 #define ETH_TYPE_MIN 0x600
256 #define ETH_HEADER_LEN 14
257 #define ETH_PAYLOAD_MIN 46
258 #define ETH_PAYLOAD_MAX 1500
259 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
260 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
261 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
264 uint8_t eth_dst[ETH_ADDR_LEN];
265 uint8_t eth_src[ETH_ADDR_LEN];
268 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
270 #define LLC_DSAP_SNAP 0xaa
271 #define LLC_SSAP_SNAP 0xaa
272 #define LLC_CNTL_SNAP 3
274 #define LLC_HEADER_LEN 3
281 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
283 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
284 sizeof(SNAP_ORG_ETHERNET) == 3. */
285 #define SNAP_HEADER_LEN 5
291 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
293 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
295 struct llc_snap_header {
296 struct llc_header llc;
297 struct snap_header snap;
299 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
301 #define VLAN_VID_MASK 0x0fff
302 #define VLAN_VID_SHIFT 0
304 #define VLAN_PCP_MASK 0xe000
305 #define VLAN_PCP_SHIFT 13
307 #define VLAN_CFI 0x1000
308 #define VLAN_CFI_SHIFT 12
310 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
311 * returns the VLAN ID in host byte order. */
312 static inline uint16_t
313 vlan_tci_to_vid(ovs_be16 vlan_tci)
315 return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
318 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
319 * returns the priority code point (PCP) in host byte order. */
321 vlan_tci_to_pcp(ovs_be16 vlan_tci)
323 return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
326 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
327 * returns the Canonical Format Indicator (CFI). */
329 vlan_tci_to_cfi(ovs_be16 vlan_tci)
331 return (vlan_tci & htons(VLAN_CFI)) != 0;
334 #define VLAN_HEADER_LEN 4
336 ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */
337 ovs_be16 vlan_next_type;
339 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
341 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
343 struct vlan_eth_header {
344 uint8_t veth_dst[ETH_ADDR_LEN];
345 uint8_t veth_src[ETH_ADDR_LEN];
346 ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */
347 ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */
348 ovs_be16 veth_next_type;
350 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
352 /* MPLS related definitions */
353 #define MPLS_TTL_MASK 0x000000ff
354 #define MPLS_TTL_SHIFT 0
356 #define MPLS_BOS_MASK 0x00000100
357 #define MPLS_BOS_SHIFT 8
359 #define MPLS_TC_MASK 0x00000e00
360 #define MPLS_TC_SHIFT 9
362 #define MPLS_LABEL_MASK 0xfffff000
363 #define MPLS_LABEL_SHIFT 12
368 ovs_16aligned_be32 mpls_lse;
370 BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr));
372 /* Given a mpls label stack entry in network byte order
373 * return mpls label in host byte order */
374 static inline uint32_t
375 mpls_lse_to_label(ovs_be32 mpls_lse)
377 return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT;
380 /* Given a mpls label stack entry in network byte order
382 static inline uint8_t
383 mpls_lse_to_tc(ovs_be32 mpls_lse)
385 return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT;
388 /* Given a mpls label stack entry in network byte order
390 static inline uint8_t
391 mpls_lse_to_ttl(ovs_be32 mpls_lse)
393 return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT;
396 /* Set TTL in mpls lse. */
398 flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl)
400 *mpls_lse &= ~htonl(MPLS_TTL_MASK);
401 *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT);
404 /* Given a mpls label stack entry in network byte order
405 * return mpls BoS bit */
406 static inline uint8_t
407 mpls_lse_to_bos(ovs_be32 mpls_lse)
409 return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0;
412 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
413 #define IP_ARGS(ip) \
415 (ntohl(ip) >> 16) & 0xff, \
416 (ntohl(ip) >> 8) & 0xff, \
421 * char *string = "1 33.44.55.66 2";
425 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
429 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
430 #define IP_SCAN_ARGS(ip) \
431 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
432 &((uint8_t *) ip)[1], \
433 &((uint8_t *) ip)[2], \
436 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
437 * high-order 1-bits and 32-N low-order 0-bits. */
439 ip_is_cidr(ovs_be32 netmask)
441 uint32_t x = ~ntohl(netmask);
442 return !(x & (x + 1));
445 ip_is_multicast(ovs_be32 ip)
447 return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
449 int ip_count_cidr_bits(ovs_be32 netmask);
450 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
452 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
453 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
454 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
457 #define IPPROTO_SCTP 132
461 #define IP_ECN_NOT_ECT 0x0
462 #define IP_ECN_ECT_1 0x01
463 #define IP_ECN_ECT_0 0x02
464 #define IP_ECN_CE 0x03
465 #define IP_ECN_MASK 0x03
466 #define IP_DSCP_MASK 0xfc
470 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
471 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
472 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
473 #define IP_IS_FRAGMENT(ip_frag_off) \
474 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
476 #define IP_HEADER_LEN 20
482 ovs_be16 ip_frag_off;
486 ovs_16aligned_be32 ip_src;
487 ovs_16aligned_be32 ip_dst;
489 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
491 #define ICMP_HEADER_LEN 8
505 ovs_16aligned_be32 gateway;
507 uint8_t icmp_data[0];
509 BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header));
511 #define SCTP_HEADER_LEN 12
515 ovs_16aligned_be32 sctp_vtag;
516 ovs_16aligned_be32 sctp_csum;
518 BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header));
520 #define UDP_HEADER_LEN 8
527 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
529 #define TCP_FIN 0x001
530 #define TCP_SYN 0x002
531 #define TCP_RST 0x004
532 #define TCP_PSH 0x008
533 #define TCP_ACK 0x010
534 #define TCP_URG 0x020
535 #define TCP_ECE 0x040
536 #define TCP_CWR 0x080
539 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
540 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
541 #define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff))
542 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
544 #define TCP_HEADER_LEN 20
548 ovs_16aligned_be32 tcp_seq;
549 ovs_16aligned_be32 tcp_ack;
555 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
557 #define ARP_HRD_ETHERNET 1
558 #define ARP_PRO_IP 0x0800
559 #define ARP_OP_REQUEST 1
560 #define ARP_OP_REPLY 2
561 #define ARP_OP_RARP 3
563 #define ARP_ETH_HEADER_LEN 28
564 struct arp_eth_header {
565 /* Generic members. */
566 ovs_be16 ar_hrd; /* Hardware type. */
567 ovs_be16 ar_pro; /* Protocol type. */
568 uint8_t ar_hln; /* Hardware address length. */
569 uint8_t ar_pln; /* Protocol address length. */
570 ovs_be16 ar_op; /* Opcode. */
572 /* Ethernet+IPv4 specific members. */
573 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
574 ovs_16aligned_be32 ar_spa; /* Sender protocol address. */
575 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
576 ovs_16aligned_be32 ar_tpa; /* Target protocol address. */
578 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
580 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
581 * most implementations, this one only requires 16-bit alignment. */
582 union ovs_16aligned_in6_addr {
584 ovs_16aligned_be32 be32[4];
587 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
588 * one only requires 16-bit alignment. */
589 struct ovs_16aligned_ip6_hdr {
591 struct ovs_16aligned_ip6_hdrctl {
592 ovs_16aligned_be32 ip6_un1_flow;
593 ovs_be16 ip6_un1_plen;
595 uint8_t ip6_un1_hlim;
599 union ovs_16aligned_in6_addr ip6_src;
600 union ovs_16aligned_in6_addr ip6_dst;
603 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
604 * this one only requires 16-bit alignment. */
605 struct ovs_16aligned_ip6_frag {
607 uint8_t ip6f_reserved;
609 ovs_16aligned_be32 ip6f_ident;
612 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
613 #define IPV6_LABEL_MASK 0x000fffff
617 * char *string = "1 ::1 2";
618 * char ipv6_s[IPV6_SCAN_LEN + 1];
619 * struct in6_addr ipv6;
621 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
622 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
626 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
627 #define IPV6_SCAN_LEN 46
629 extern const struct in6_addr in6addr_exact;
630 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
631 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
633 static inline bool ipv6_addr_equals(const struct in6_addr *a,
634 const struct in6_addr *b)
636 #ifdef IN6_ARE_ADDR_EQUAL
637 return IN6_ARE_ADDR_EQUAL(a, b);
639 return !memcmp(a, b, sizeof(*a));
643 static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
644 return ipv6_addr_equals(mask, &in6addr_any);
647 static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
648 return ipv6_addr_equals(mask, &in6addr_exact);
651 static inline bool dl_type_is_ip_any(ovs_be16 dl_type)
653 return dl_type == htons(ETH_TYPE_IP)
654 || dl_type == htons(ETH_TYPE_IPV6);
657 void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
658 void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
659 void print_ipv6_masked(struct ds *string, const struct in6_addr *addr,
660 const struct in6_addr *mask);
661 struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
662 const struct in6_addr *mask);
663 struct in6_addr ipv6_create_mask(int mask);
664 int ipv6_count_cidr_bits(const struct in6_addr *netmask);
665 bool ipv6_is_cidr(const struct in6_addr *netmask);
667 void *eth_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
668 const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
670 void *snap_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
671 const uint8_t eth_src[ETH_ADDR_LEN],
672 unsigned int oui, uint16_t snap_type, size_t size);
673 void packet_set_ipv4(struct ofpbuf *, ovs_be32 src, ovs_be32 dst, uint8_t tos,
675 void packet_set_ipv6(struct ofpbuf *, uint8_t proto, const ovs_be32 src[4],
676 const ovs_be32 dst[4], uint8_t tc,
677 ovs_be32 fl, uint8_t hlmit);
678 void packet_set_tcp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
679 void packet_set_udp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
680 void packet_set_sctp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
682 void packet_format_tcp_flags(struct ds *, uint16_t);
683 const char *packet_tcp_flag_to_string(uint32_t flag);
685 #endif /* packets.h */