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"
35 /* Datapath packet metadata */
37 uint32_t recirc_id; /* Recirculation id carried with the
38 recirculating packets. 0 for packets
39 received from the wire. */
40 uint32_t dp_hash; /* hash value computed by the recirculation
42 struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */
43 uint32_t skb_priority; /* Packet priority for QoS. */
44 uint32_t pkt_mark; /* Packet mark. */
45 union flow_in_port in_port; /* Input port. */
48 #define PKT_METADATA_INITIALIZER(PORT) \
49 (struct pkt_metadata){ 0, 0, { 0, 0, 0, 0, 0, 0}, 0, 0, {(PORT)} }
51 static inline struct pkt_metadata
52 pkt_metadata_from_flow(const struct flow *flow)
54 struct pkt_metadata md;
56 md.recirc_id = flow->recirc_id;
57 md.dp_hash = flow->dp_hash;
58 md.tunnel = flow->tunnel;
59 md.skb_priority = flow->skb_priority;
60 md.pkt_mark = flow->pkt_mark;
61 md.in_port = flow->in_port;
66 bool dpid_from_string(const char *s, uint64_t *dpidp);
68 #define ETH_ADDR_LEN 6
70 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED
71 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
73 static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED
74 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
76 static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED
77 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 };
79 static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED
80 = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 };
82 static inline bool eth_addr_is_broadcast(const uint8_t ea[6])
84 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
87 static inline bool eth_addr_is_multicast(const uint8_t ea[6])
91 static inline bool eth_addr_is_local(const uint8_t ea[6])
93 /* Local if it is either a locally administered address or a Nicira random
96 || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80);
98 static inline bool eth_addr_is_zero(const uint8_t ea[6])
100 return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
103 static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN])
105 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
108 static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN],
109 const uint8_t b[ETH_ADDR_LEN])
111 return memcmp(a, b, ETH_ADDR_LEN);
113 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
114 const uint8_t b[ETH_ADDR_LEN])
116 return !eth_addr_compare_3way(a, b);
118 static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN],
119 const uint8_t b[ETH_ADDR_LEN],
120 const uint8_t mask[ETH_ADDR_LEN])
122 return !(((a[0] ^ b[0]) & mask[0])
123 || ((a[1] ^ b[1]) & mask[1])
124 || ((a[2] ^ b[2]) & mask[2])
125 || ((a[3] ^ b[3]) & mask[3])
126 || ((a[4] ^ b[4]) & mask[4])
127 || ((a[5] ^ b[5]) & mask[5]));
129 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
131 return (((uint64_t) ea[0] << 40)
132 | ((uint64_t) ea[1] << 32)
133 | ((uint64_t) ea[2] << 24)
134 | ((uint64_t) ea[3] << 16)
135 | ((uint64_t) ea[4] << 8)
138 static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN],
141 return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea));
143 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
152 static inline void eth_addr_mark_random(uint8_t ea[ETH_ADDR_LEN])
154 ea[0] &= ~1; /* Unicast. */
155 ea[0] |= 2; /* Private. */
157 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
159 random_bytes(ea, ETH_ADDR_LEN);
160 eth_addr_mark_random(ea);
162 static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN])
166 /* Set the OUI to the Nicira one. */
171 /* Set the top bit to indicate random Nicira address. */
174 static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN],
175 const uint16_t vlan, const uint32_t basis)
177 return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis);
180 bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]);
181 bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]);
183 void compose_rarp(struct ofpbuf *, const uint8_t eth_src[ETH_ADDR_LEN]);
185 void eth_push_vlan(struct ofpbuf *, ovs_be16 tpid, ovs_be16 tci);
186 void eth_pop_vlan(struct ofpbuf *);
188 const char *eth_from_hex(const char *hex, struct ofpbuf **packetp);
189 void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN],
190 const uint8_t mask[ETH_ADDR_LEN], struct ds *s);
191 void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN],
192 const uint8_t mask[ETH_ADDR_LEN],
193 uint8_t dst[ETH_ADDR_LEN]);
195 void set_mpls_lse(struct ofpbuf *, ovs_be32 label);
196 void push_mpls(struct ofpbuf *packet, ovs_be16 ethtype, ovs_be32 lse);
197 void pop_mpls(struct ofpbuf *, ovs_be16 ethtype);
199 void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl);
200 void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc);
201 void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label);
202 void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos);
203 ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos,
208 * uint8_t mac[ETH_ADDR_LEN];
210 * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
213 #define ETH_ADDR_FMT \
214 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
215 #define ETH_ADDR_ARGS(ea) \
216 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
220 * char *string = "1 00:11:22:33:44:55 2";
221 * uint8_t mac[ETH_ADDR_LEN];
224 * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d",
225 * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) {
229 #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
230 #define ETH_ADDR_SCAN_ARGS(ea) \
231 &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
233 #define ETH_TYPE_IP 0x0800
234 #define ETH_TYPE_ARP 0x0806
235 #define ETH_TYPE_VLAN_8021Q 0x8100
236 #define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q
237 #define ETH_TYPE_VLAN_8021AD 0x88a8
238 #define ETH_TYPE_IPV6 0x86dd
239 #define ETH_TYPE_LACP 0x8809
240 #define ETH_TYPE_RARP 0x8035
241 #define ETH_TYPE_MPLS 0x8847
242 #define ETH_TYPE_MPLS_MCAST 0x8848
244 static inline bool eth_type_mpls(ovs_be16 eth_type)
246 return eth_type == htons(ETH_TYPE_MPLS) ||
247 eth_type == htons(ETH_TYPE_MPLS_MCAST);
250 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
252 #define ETH_TYPE_MIN 0x600
254 #define ETH_HEADER_LEN 14
255 #define ETH_PAYLOAD_MIN 46
256 #define ETH_PAYLOAD_MAX 1500
257 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
258 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
259 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
262 uint8_t eth_dst[ETH_ADDR_LEN];
263 uint8_t eth_src[ETH_ADDR_LEN];
266 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
268 #define LLC_DSAP_SNAP 0xaa
269 #define LLC_SSAP_SNAP 0xaa
270 #define LLC_CNTL_SNAP 3
272 #define LLC_HEADER_LEN 3
279 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
281 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
282 sizeof(SNAP_ORG_ETHERNET) == 3. */
283 #define SNAP_HEADER_LEN 5
289 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
291 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
293 struct llc_snap_header {
294 struct llc_header llc;
295 struct snap_header snap;
297 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
299 #define VLAN_VID_MASK 0x0fff
300 #define VLAN_VID_SHIFT 0
302 #define VLAN_PCP_MASK 0xe000
303 #define VLAN_PCP_SHIFT 13
305 #define VLAN_CFI 0x1000
306 #define VLAN_CFI_SHIFT 12
308 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
309 * returns the VLAN ID in host byte order. */
310 static inline uint16_t
311 vlan_tci_to_vid(ovs_be16 vlan_tci)
313 return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
316 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
317 * returns the priority code point (PCP) in host byte order. */
319 vlan_tci_to_pcp(ovs_be16 vlan_tci)
321 return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
324 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
325 * returns the Canonical Format Indicator (CFI). */
327 vlan_tci_to_cfi(ovs_be16 vlan_tci)
329 return (vlan_tci & htons(VLAN_CFI)) != 0;
332 #define VLAN_HEADER_LEN 4
334 ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */
335 ovs_be16 vlan_next_type;
337 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
339 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
341 struct vlan_eth_header {
342 uint8_t veth_dst[ETH_ADDR_LEN];
343 uint8_t veth_src[ETH_ADDR_LEN];
344 ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */
345 ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */
346 ovs_be16 veth_next_type;
348 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
350 /* MPLS related definitions */
351 #define MPLS_TTL_MASK 0x000000ff
352 #define MPLS_TTL_SHIFT 0
354 #define MPLS_BOS_MASK 0x00000100
355 #define MPLS_BOS_SHIFT 8
357 #define MPLS_TC_MASK 0x00000e00
358 #define MPLS_TC_SHIFT 9
360 #define MPLS_LABEL_MASK 0xfffff000
361 #define MPLS_LABEL_SHIFT 12
366 ovs_16aligned_be32 mpls_lse;
368 BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr));
370 /* Given a mpls label stack entry in network byte order
371 * return mpls label in host byte order */
372 static inline uint32_t
373 mpls_lse_to_label(ovs_be32 mpls_lse)
375 return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT;
378 /* Given a mpls label stack entry in network byte order
380 static inline uint8_t
381 mpls_lse_to_tc(ovs_be32 mpls_lse)
383 return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT;
386 /* Given a mpls label stack entry in network byte order
388 static inline uint8_t
389 mpls_lse_to_ttl(ovs_be32 mpls_lse)
391 return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT;
394 /* Set TTL in mpls lse. */
396 flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl)
398 *mpls_lse &= ~htonl(MPLS_TTL_MASK);
399 *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT);
402 /* Given a mpls label stack entry in network byte order
403 * return mpls BoS bit */
404 static inline uint8_t
405 mpls_lse_to_bos(ovs_be32 mpls_lse)
407 return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0;
410 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
411 #define IP_ARGS(ip) \
413 (ntohl(ip) >> 16) & 0xff, \
414 (ntohl(ip) >> 8) & 0xff, \
419 * char *string = "1 33.44.55.66 2";
423 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
427 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
428 #define IP_SCAN_ARGS(ip) \
429 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
430 &((uint8_t *) ip)[1], \
431 &((uint8_t *) ip)[2], \
434 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
435 * high-order 1-bits and 32-N low-order 0-bits. */
437 ip_is_cidr(ovs_be32 netmask)
439 uint32_t x = ~ntohl(netmask);
440 return !(x & (x + 1));
443 ip_is_multicast(ovs_be32 ip)
445 return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
447 int ip_count_cidr_bits(ovs_be32 netmask);
448 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
450 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
451 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
452 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
455 #define IPPROTO_SCTP 132
459 #define IP_ECN_NOT_ECT 0x0
460 #define IP_ECN_ECT_1 0x01
461 #define IP_ECN_ECT_0 0x02
462 #define IP_ECN_CE 0x03
463 #define IP_ECN_MASK 0x03
464 #define IP_DSCP_MASK 0xfc
468 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
469 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
470 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
471 #define IP_IS_FRAGMENT(ip_frag_off) \
472 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
474 #define IP_HEADER_LEN 20
480 ovs_be16 ip_frag_off;
484 ovs_16aligned_be32 ip_src;
485 ovs_16aligned_be32 ip_dst;
487 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
489 #define ICMP_HEADER_LEN 8
503 ovs_16aligned_be32 gateway;
505 uint8_t icmp_data[0];
507 BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header));
509 #define SCTP_HEADER_LEN 12
513 ovs_16aligned_be32 sctp_vtag;
514 ovs_16aligned_be32 sctp_csum;
516 BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header));
518 #define UDP_HEADER_LEN 8
525 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
527 #define TCP_FIN 0x001
528 #define TCP_SYN 0x002
529 #define TCP_RST 0x004
530 #define TCP_PSH 0x008
531 #define TCP_ACK 0x010
532 #define TCP_URG 0x020
533 #define TCP_ECE 0x040
534 #define TCP_CWR 0x080
537 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
538 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
539 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
541 #define TCP_HEADER_LEN 20
545 ovs_16aligned_be32 tcp_seq;
546 ovs_16aligned_be32 tcp_ack;
552 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
554 #define ARP_HRD_ETHERNET 1
555 #define ARP_PRO_IP 0x0800
556 #define ARP_OP_REQUEST 1
557 #define ARP_OP_REPLY 2
558 #define ARP_OP_RARP 3
560 #define ARP_ETH_HEADER_LEN 28
561 struct arp_eth_header {
562 /* Generic members. */
563 ovs_be16 ar_hrd; /* Hardware type. */
564 ovs_be16 ar_pro; /* Protocol type. */
565 uint8_t ar_hln; /* Hardware address length. */
566 uint8_t ar_pln; /* Protocol address length. */
567 ovs_be16 ar_op; /* Opcode. */
569 /* Ethernet+IPv4 specific members. */
570 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
571 ovs_16aligned_be32 ar_spa; /* Sender protocol address. */
572 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
573 ovs_16aligned_be32 ar_tpa; /* Target protocol address. */
575 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
577 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
578 * most implementations, this one only requires 16-bit alignment. */
579 union ovs_16aligned_in6_addr {
581 ovs_16aligned_be32 be32[4];
584 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
585 * one only requires 16-bit alignment. */
586 struct ovs_16aligned_ip6_hdr {
588 struct ovs_16aligned_ip6_hdrctl {
589 ovs_16aligned_be32 ip6_un1_flow;
590 ovs_be16 ip6_un1_plen;
592 uint8_t ip6_un1_hlim;
596 union ovs_16aligned_in6_addr ip6_src;
597 union ovs_16aligned_in6_addr ip6_dst;
600 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
601 * this one only requires 16-bit alignment. */
602 struct ovs_16aligned_ip6_frag {
604 uint8_t ip6f_reserved;
606 ovs_16aligned_be32 ip6f_ident;
609 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
610 #define IPV6_LABEL_MASK 0x000fffff
614 * char *string = "1 ::1 2";
615 * char ipv6_s[IPV6_SCAN_LEN + 1];
616 * struct in6_addr ipv6;
618 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
619 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
623 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
624 #define IPV6_SCAN_LEN 46
626 extern const struct in6_addr in6addr_exact;
627 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
628 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
630 static inline bool ipv6_addr_equals(const struct in6_addr *a,
631 const struct in6_addr *b)
633 #ifdef IN6_ARE_ADDR_EQUAL
634 return IN6_ARE_ADDR_EQUAL(a, b);
636 return !memcmp(a, b, sizeof(*a));
640 static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
641 return ipv6_addr_equals(mask, &in6addr_any);
644 static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
645 return ipv6_addr_equals(mask, &in6addr_exact);
648 static inline bool dl_type_is_ip_any(ovs_be16 dl_type)
650 return dl_type == htons(ETH_TYPE_IP)
651 || dl_type == htons(ETH_TYPE_IPV6);
654 static inline bool is_ip_any(const struct flow *flow)
656 return dl_type_is_ip_any(flow->dl_type);
659 static inline bool is_icmpv4(const struct flow *flow)
661 return (flow->dl_type == htons(ETH_TYPE_IP)
662 && flow->nw_proto == IPPROTO_ICMP);
665 static inline bool is_icmpv6(const struct flow *flow)
667 return (flow->dl_type == htons(ETH_TYPE_IPV6)
668 && flow->nw_proto == IPPROTO_ICMPV6);
671 void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
672 void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
673 void print_ipv6_masked(struct ds *string, const struct in6_addr *addr,
674 const struct in6_addr *mask);
675 struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
676 const struct in6_addr *mask);
677 struct in6_addr ipv6_create_mask(int mask);
678 int ipv6_count_cidr_bits(const struct in6_addr *netmask);
679 bool ipv6_is_cidr(const struct in6_addr *netmask);
681 void *eth_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
682 const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
684 void *snap_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
685 const uint8_t eth_src[ETH_ADDR_LEN],
686 unsigned int oui, uint16_t snap_type, size_t size);
687 void packet_set_ipv4(struct ofpbuf *, ovs_be32 src, ovs_be32 dst, uint8_t tos,
689 void packet_set_ipv6(struct ofpbuf *, uint8_t proto, const ovs_be32 src[4],
690 const ovs_be32 dst[4], uint8_t tc,
691 ovs_be32 fl, uint8_t hlmit);
692 void packet_set_tcp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
693 void packet_set_udp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
694 void packet_set_sctp_port(struct ofpbuf *, ovs_be16 src, ovs_be16 dst);
696 void packet_format_tcp_flags(struct ds *, uint16_t);
697 const char *packet_tcp_flag_to_string(uint32_t flag);
699 #endif /* packets.h */