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.
21 #include <sys/types.h>
22 #include <netinet/in.h>
26 #include "openvswitch/types.h"
34 /* Tunnel information used in flow key and metadata. */
46 uint8_t pad1[5]; /* Pad to 64 bits. */
49 /* Unfortunately, a "struct flow" sometimes has to handle OpenFlow port
50 * numbers and other times datapath (dpif) port numbers. This union allows
57 /* Datapath packet metadata */
59 uint32_t recirc_id; /* Recirculation id carried with the
60 recirculating packets. 0 for packets
61 received from the wire. */
62 uint32_t dp_hash; /* hash value computed by the recirculation
64 struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */
65 uint32_t skb_priority; /* Packet priority for QoS. */
66 uint32_t pkt_mark; /* Packet mark. */
67 union flow_in_port in_port; /* Input port. */
70 #define PKT_METADATA_INITIALIZER(PORT) \
71 (struct pkt_metadata){ .in_port.odp_port = PORT }
73 bool dpid_from_string(const char *s, uint64_t *dpidp);
75 #define ETH_ADDR_LEN 6
77 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED
78 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
80 static const uint8_t eth_addr_zero[ETH_ADDR_LEN] OVS_UNUSED
81 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
83 static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED
84 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
86 static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED
87 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 };
89 static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED
90 = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 };
92 static inline bool eth_addr_is_broadcast(const uint8_t ea[ETH_ADDR_LEN])
94 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
97 static inline bool eth_addr_is_multicast(const uint8_t ea[ETH_ADDR_LEN])
101 static inline bool eth_addr_is_local(const uint8_t ea[ETH_ADDR_LEN])
103 /* Local if it is either a locally administered address or a Nicira random
106 || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80);
108 static inline bool eth_addr_is_zero(const uint8_t ea[ETH_ADDR_LEN])
110 return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
113 static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN])
115 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
118 static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN],
119 const uint8_t b[ETH_ADDR_LEN])
121 return memcmp(a, b, ETH_ADDR_LEN);
123 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
124 const uint8_t b[ETH_ADDR_LEN])
126 return !eth_addr_compare_3way(a, b);
128 static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN],
129 const uint8_t b[ETH_ADDR_LEN],
130 const uint8_t mask[ETH_ADDR_LEN])
132 return !(((a[0] ^ b[0]) & mask[0])
133 || ((a[1] ^ b[1]) & mask[1])
134 || ((a[2] ^ b[2]) & mask[2])
135 || ((a[3] ^ b[3]) & mask[3])
136 || ((a[4] ^ b[4]) & mask[4])
137 || ((a[5] ^ b[5]) & mask[5]));
139 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
141 return (((uint64_t) ea[0] << 40)
142 | ((uint64_t) ea[1] << 32)
143 | ((uint64_t) ea[2] << 24)
144 | ((uint64_t) ea[3] << 16)
145 | ((uint64_t) ea[4] << 8)
148 static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN],
151 return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea));
153 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
162 static inline void eth_addr_mark_random(uint8_t ea[ETH_ADDR_LEN])
164 ea[0] &= ~1; /* Unicast. */
165 ea[0] |= 2; /* Private. */
167 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
169 random_bytes(ea, ETH_ADDR_LEN);
170 eth_addr_mark_random(ea);
172 static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN])
176 /* Set the OUI to the Nicira one. */
181 /* Set the top bit to indicate random Nicira address. */
184 static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN],
185 const uint16_t vlan, const uint32_t basis)
187 return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis);
190 bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]);
191 bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]);
193 void compose_rarp(struct dp_packet *, const uint8_t eth_src[ETH_ADDR_LEN]);
195 void eth_push_vlan(struct dp_packet *, ovs_be16 tpid, ovs_be16 tci);
196 void eth_pop_vlan(struct dp_packet *);
198 const char *eth_from_hex(const char *hex, struct dp_packet **packetp);
199 void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN],
200 const uint8_t mask[ETH_ADDR_LEN], struct ds *s);
201 void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN],
202 const uint8_t mask[ETH_ADDR_LEN],
203 uint8_t dst[ETH_ADDR_LEN]);
205 void set_mpls_lse(struct dp_packet *, ovs_be32 label);
206 void push_mpls(struct dp_packet *packet, ovs_be16 ethtype, ovs_be32 lse);
207 void pop_mpls(struct dp_packet *, ovs_be16 ethtype);
209 void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl);
210 void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc);
211 void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label);
212 void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos);
213 ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos,
218 * uint8_t mac[ETH_ADDR_LEN];
220 * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
223 #define ETH_ADDR_FMT \
224 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
225 #define ETH_ADDR_ARGS(ea) \
226 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
230 * char *string = "1 00:11:22:33:44:55 2";
231 * uint8_t mac[ETH_ADDR_LEN];
234 * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d",
235 * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) {
239 #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
240 #define ETH_ADDR_SCAN_ARGS(ea) \
241 &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
243 #define ETH_TYPE_IP 0x0800
244 #define ETH_TYPE_ARP 0x0806
245 #define ETH_TYPE_TEB 0x6558
246 #define ETH_TYPE_VLAN_8021Q 0x8100
247 #define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q
248 #define ETH_TYPE_VLAN_8021AD 0x88a8
249 #define ETH_TYPE_IPV6 0x86dd
250 #define ETH_TYPE_LACP 0x8809
251 #define ETH_TYPE_RARP 0x8035
252 #define ETH_TYPE_MPLS 0x8847
253 #define ETH_TYPE_MPLS_MCAST 0x8848
255 static inline bool eth_type_mpls(ovs_be16 eth_type)
257 return eth_type == htons(ETH_TYPE_MPLS) ||
258 eth_type == htons(ETH_TYPE_MPLS_MCAST);
261 static inline bool eth_type_vlan(ovs_be16 eth_type)
263 return eth_type == htons(ETH_TYPE_VLAN_8021Q) ||
264 eth_type == htons(ETH_TYPE_VLAN_8021AD);
268 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
270 #define ETH_TYPE_MIN 0x600
272 #define ETH_HEADER_LEN 14
273 #define ETH_PAYLOAD_MIN 46
274 #define ETH_PAYLOAD_MAX 1500
275 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
276 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
277 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
280 uint8_t eth_dst[ETH_ADDR_LEN];
281 uint8_t eth_src[ETH_ADDR_LEN];
284 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
286 #define LLC_DSAP_SNAP 0xaa
287 #define LLC_SSAP_SNAP 0xaa
288 #define LLC_CNTL_SNAP 3
290 #define LLC_HEADER_LEN 3
297 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
299 /* LLC field values used for STP frames. */
300 #define STP_LLC_SSAP 0x42
301 #define STP_LLC_DSAP 0x42
302 #define STP_LLC_CNTL 0x03
304 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
305 sizeof(SNAP_ORG_ETHERNET) == 3. */
306 #define SNAP_HEADER_LEN 5
312 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
314 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
316 struct llc_snap_header {
317 struct llc_header llc;
318 struct snap_header snap;
320 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
322 #define VLAN_VID_MASK 0x0fff
323 #define VLAN_VID_SHIFT 0
325 #define VLAN_PCP_MASK 0xe000
326 #define VLAN_PCP_SHIFT 13
328 #define VLAN_CFI 0x1000
329 #define VLAN_CFI_SHIFT 12
331 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
332 * returns the VLAN ID in host byte order. */
333 static inline uint16_t
334 vlan_tci_to_vid(ovs_be16 vlan_tci)
336 return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
339 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
340 * returns the priority code point (PCP) in host byte order. */
342 vlan_tci_to_pcp(ovs_be16 vlan_tci)
344 return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
347 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
348 * returns the Canonical Format Indicator (CFI). */
350 vlan_tci_to_cfi(ovs_be16 vlan_tci)
352 return (vlan_tci & htons(VLAN_CFI)) != 0;
355 #define VLAN_HEADER_LEN 4
357 ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */
358 ovs_be16 vlan_next_type;
360 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
362 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
364 struct vlan_eth_header {
365 uint8_t veth_dst[ETH_ADDR_LEN];
366 uint8_t veth_src[ETH_ADDR_LEN];
367 ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */
368 ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */
369 ovs_be16 veth_next_type;
371 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
373 /* MPLS related definitions */
374 #define MPLS_TTL_MASK 0x000000ff
375 #define MPLS_TTL_SHIFT 0
377 #define MPLS_BOS_MASK 0x00000100
378 #define MPLS_BOS_SHIFT 8
380 #define MPLS_TC_MASK 0x00000e00
381 #define MPLS_TC_SHIFT 9
383 #define MPLS_LABEL_MASK 0xfffff000
384 #define MPLS_LABEL_SHIFT 12
389 ovs_16aligned_be32 mpls_lse;
391 BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr));
393 /* Given a mpls label stack entry in network byte order
394 * return mpls label in host byte order */
395 static inline uint32_t
396 mpls_lse_to_label(ovs_be32 mpls_lse)
398 return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT;
401 /* Given a mpls label stack entry in network byte order
403 static inline uint8_t
404 mpls_lse_to_tc(ovs_be32 mpls_lse)
406 return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT;
409 /* Given a mpls label stack entry in network byte order
411 static inline uint8_t
412 mpls_lse_to_ttl(ovs_be32 mpls_lse)
414 return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT;
417 /* Set TTL in mpls lse. */
419 flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl)
421 *mpls_lse &= ~htonl(MPLS_TTL_MASK);
422 *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT);
425 /* Given a mpls label stack entry in network byte order
426 * return mpls BoS bit */
427 static inline uint8_t
428 mpls_lse_to_bos(ovs_be32 mpls_lse)
430 return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0;
433 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
434 #define IP_ARGS(ip) \
436 (ntohl(ip) >> 16) & 0xff, \
437 (ntohl(ip) >> 8) & 0xff, \
442 * char *string = "1 33.44.55.66 2";
446 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
450 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
451 #define IP_SCAN_ARGS(ip) \
452 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
453 &((uint8_t *) ip)[1], \
454 &((uint8_t *) ip)[2], \
457 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
458 * high-order 1-bits and 32-N low-order 0-bits. */
460 ip_is_cidr(ovs_be32 netmask)
462 uint32_t x = ~ntohl(netmask);
463 return !(x & (x + 1));
466 ip_is_multicast(ovs_be32 ip)
468 return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
471 ip_is_local_multicast(ovs_be32 ip)
473 return (ip & htonl(0xffffff00)) == htonl(0xe0000000);
475 int ip_count_cidr_bits(ovs_be32 netmask);
476 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
478 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
479 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
480 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
483 #define IPPROTO_SCTP 132
487 #define IP_ECN_NOT_ECT 0x0
488 #define IP_ECN_ECT_1 0x01
489 #define IP_ECN_ECT_0 0x02
490 #define IP_ECN_CE 0x03
491 #define IP_ECN_MASK 0x03
492 #define IP_DSCP_MASK 0xfc
496 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
497 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
498 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
499 #define IP_IS_FRAGMENT(ip_frag_off) \
500 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
502 #define IP_HEADER_LEN 20
508 ovs_be16 ip_frag_off;
512 ovs_16aligned_be32 ip_src;
513 ovs_16aligned_be32 ip_dst;
516 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
518 #define ICMP_HEADER_LEN 8
532 ovs_16aligned_be32 gateway;
535 BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header));
537 #define IGMP_HEADER_LEN 8
542 ovs_16aligned_be32 group;
544 BUILD_ASSERT_DECL(IGMP_HEADER_LEN == sizeof(struct igmp_header));
546 #define IGMPV3_HEADER_LEN 8
547 struct igmpv3_header {
554 BUILD_ASSERT_DECL(IGMPV3_HEADER_LEN == sizeof(struct igmpv3_header));
556 #define IGMPV3_RECORD_LEN 8
557 struct igmpv3_record {
561 ovs_16aligned_be32 maddr;
563 BUILD_ASSERT_DECL(IGMPV3_RECORD_LEN == sizeof(struct igmpv3_record));
565 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
566 #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
567 #define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */
568 #define IGMP_HOST_LEAVE_MESSAGE 0x17
569 #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */
571 #define IGMPV3_MODE_IS_INCLUDE 1
572 #define IGMPV3_MODE_IS_EXCLUDE 2
573 #define IGMPV3_CHANGE_TO_INCLUDE_MODE 3
574 #define IGMPV3_CHANGE_TO_EXCLUDE_MODE 4
575 #define IGMPV3_ALLOW_NEW_SOURCES 5
576 #define IGMPV3_BLOCK_OLD_SOURCES 6
578 #define SCTP_HEADER_LEN 12
582 ovs_16aligned_be32 sctp_vtag;
583 ovs_16aligned_be32 sctp_csum;
585 BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header));
587 #define UDP_HEADER_LEN 8
594 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
596 #define TCP_FIN 0x001
597 #define TCP_SYN 0x002
598 #define TCP_RST 0x004
599 #define TCP_PSH 0x008
600 #define TCP_ACK 0x010
601 #define TCP_URG 0x020
602 #define TCP_ECE 0x040
603 #define TCP_CWR 0x080
606 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
607 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
608 #define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff))
609 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
611 #define TCP_HEADER_LEN 20
615 ovs_16aligned_be32 tcp_seq;
616 ovs_16aligned_be32 tcp_ack;
622 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
624 #define ARP_HRD_ETHERNET 1
625 #define ARP_PRO_IP 0x0800
626 #define ARP_OP_REQUEST 1
627 #define ARP_OP_REPLY 2
628 #define ARP_OP_RARP 3
630 #define ARP_ETH_HEADER_LEN 28
631 struct arp_eth_header {
632 /* Generic members. */
633 ovs_be16 ar_hrd; /* Hardware type. */
634 ovs_be16 ar_pro; /* Protocol type. */
635 uint8_t ar_hln; /* Hardware address length. */
636 uint8_t ar_pln; /* Protocol address length. */
637 ovs_be16 ar_op; /* Opcode. */
639 /* Ethernet+IPv4 specific members. */
640 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
641 ovs_16aligned_be32 ar_spa; /* Sender protocol address. */
642 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
643 ovs_16aligned_be32 ar_tpa; /* Target protocol address. */
645 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
647 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
648 * most implementations, this one only requires 16-bit alignment. */
649 union ovs_16aligned_in6_addr {
651 ovs_16aligned_be32 be32[4];
654 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
655 * one only requires 16-bit alignment. */
656 struct ovs_16aligned_ip6_hdr {
658 struct ovs_16aligned_ip6_hdrctl {
659 ovs_16aligned_be32 ip6_un1_flow;
660 ovs_be16 ip6_un1_plen;
662 uint8_t ip6_un1_hlim;
666 union ovs_16aligned_in6_addr ip6_src;
667 union ovs_16aligned_in6_addr ip6_dst;
670 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
671 * this one only requires 16-bit alignment. */
672 struct ovs_16aligned_ip6_frag {
674 uint8_t ip6f_reserved;
676 ovs_16aligned_be32 ip6f_ident;
679 #define ICMP6_HEADER_LEN 4
680 struct icmp6_header {
683 ovs_be16 icmp6_cksum;
685 BUILD_ASSERT_DECL(ICMP6_HEADER_LEN == sizeof(struct icmp6_header));
687 /* Neighbor Discovery option field.
688 * ND options are always a multiple of 8 bytes in size. */
691 uint8_t nd_opt_type; /* Values defined in icmp6.h */
692 uint8_t nd_opt_len; /* in units of 8 octets (the size of this struct) */
693 uint8_t nd_opt_data[6]; /* Ethernet address in the case of SLL or TLL options */
695 BUILD_ASSERT_DECL(ND_OPT_LEN == sizeof(struct ovs_nd_opt));
697 /* Like struct nd_msg (from ndisc.h), but whereas that struct requires 32-bit
698 * alignment, this one only requires 16-bit alignment. */
699 #define ND_MSG_LEN 24
701 struct icmp6_header icmph;
702 ovs_16aligned_be32 rco_flags;
703 union ovs_16aligned_in6_addr target;
704 struct ovs_nd_opt options[0];
706 BUILD_ASSERT_DECL(ND_MSG_LEN == sizeof(struct ovs_nd_msg));
708 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
709 #define IPV6_LABEL_MASK 0x000fffff
713 * char *string = "1 ::1 2";
714 * char ipv6_s[IPV6_SCAN_LEN + 1];
715 * struct in6_addr ipv6;
717 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
718 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
722 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
723 #define IPV6_SCAN_LEN 46
725 extern const struct in6_addr in6addr_exact;
726 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
727 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
729 static inline bool ipv6_addr_equals(const struct in6_addr *a,
730 const struct in6_addr *b)
732 #ifdef IN6_ARE_ADDR_EQUAL
733 return IN6_ARE_ADDR_EQUAL(a, b);
735 return !memcmp(a, b, sizeof(*a));
739 static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
740 return ipv6_addr_equals(mask, &in6addr_any);
743 static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
744 return ipv6_addr_equals(mask, &in6addr_exact);
747 static inline bool dl_type_is_ip_any(ovs_be16 dl_type)
749 return dl_type == htons(ETH_TYPE_IP)
750 || dl_type == htons(ETH_TYPE_IPV6);
754 #define GENEVE_MAX_OPT_SIZE 124
756 #define GENEVE_CRIT_OPT_TYPE (1 << 7)
761 #ifdef WORDS_BIGENDIAN
776 #ifdef WORDS_BIGENDIAN
790 ovs_16aligned_be32 vni;
791 struct geneve_opt options[];
794 /* GRE protocol header */
795 struct gre_base_hdr {
800 #define GRE_CSUM 0x8000
801 #define GRE_ROUTING 0x4000
802 #define GRE_KEY 0x2000
803 #define GRE_SEQ 0x1000
804 #define GRE_STRICT 0x0800
805 #define GRE_REC 0x0700
806 #define GRE_FLAGS 0x00F8
807 #define GRE_VERSION 0x0007
809 /* VXLAN protocol header */
811 ovs_16aligned_be32 vx_flags;
812 ovs_16aligned_be32 vx_vni;
815 #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
817 void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
818 void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
819 void print_ipv6_masked(struct ds *string, const struct in6_addr *addr,
820 const struct in6_addr *mask);
821 struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
822 const struct in6_addr *mask);
823 struct in6_addr ipv6_create_mask(int mask);
824 int ipv6_count_cidr_bits(const struct in6_addr *netmask);
825 bool ipv6_is_cidr(const struct in6_addr *netmask);
827 void *eth_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
828 const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
830 void *snap_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
831 const uint8_t eth_src[ETH_ADDR_LEN],
832 unsigned int oui, uint16_t snap_type, size_t size);
833 void packet_set_ipv4(struct dp_packet *, ovs_be32 src, ovs_be32 dst, uint8_t tos,
835 void packet_set_ipv6(struct dp_packet *, uint8_t proto, const ovs_be32 src[4],
836 const ovs_be32 dst[4], uint8_t tc,
837 ovs_be32 fl, uint8_t hlmit);
838 void packet_set_tcp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
839 void packet_set_udp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
840 void packet_set_sctp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
841 void packet_set_nd(struct dp_packet *, const ovs_be32 target[4],
842 const uint8_t sll[6], const uint8_t tll[6]);
844 void packet_format_tcp_flags(struct ds *, uint16_t);
845 const char *packet_tcp_flag_to_string(uint32_t flag);
846 void compose_arp(struct dp_packet *, uint16_t arp_op,
847 const uint8_t arp_sha[ETH_ADDR_LEN],
848 const uint8_t arp_tha[ETH_ADDR_LEN], bool broadcast,
849 ovs_be32 arp_spa, ovs_be32 arp_tpa);
850 uint32_t packet_csum_pseudoheader(const struct ip_header *);
852 #endif /* packets.h */