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"
29 #include "tun-metadata.h"
35 /* Tunnel information used in flow key and metadata. */
47 uint8_t pad1[5]; /* Pad to 64 bits. */
48 struct tun_metadata metadata;
51 /* Unfortunately, a "struct flow" sometimes has to handle OpenFlow port
52 * numbers and other times datapath (dpif) port numbers. This union allows
59 /* Datapath packet metadata */
61 uint32_t recirc_id; /* Recirculation id carried with the
62 recirculating packets. 0 for packets
63 received from the wire. */
64 uint32_t dp_hash; /* hash value computed by the recirculation
66 uint32_t skb_priority; /* Packet priority for QoS. */
67 uint32_t pkt_mark; /* Packet mark. */
68 union flow_in_port in_port; /* Input port. */
69 struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */
73 pkt_metadata_init(struct pkt_metadata *md, odp_port_t port)
75 /* It can be expensive to zero out all of the tunnel metadata. However,
76 * we can just zero out ip_dst and the rest of the data will never be
78 memset(md, 0, offsetof(struct pkt_metadata, tunnel));
79 md->tunnel.ip_dst = 0;
81 md->in_port.odp_port = port;
84 bool dpid_from_string(const char *s, uint64_t *dpidp);
86 #define ETH_ADDR_LEN 6
88 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED
89 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
91 static const uint8_t eth_addr_zero[ETH_ADDR_LEN] OVS_UNUSED
92 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
94 static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED
95 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
97 static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED
98 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 };
100 static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED
101 = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 };
103 static inline bool eth_addr_is_broadcast(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 bool eth_addr_is_multicast(const uint8_t ea[ETH_ADDR_LEN])
112 static inline bool eth_addr_is_local(const uint8_t ea[ETH_ADDR_LEN])
114 /* Local if it is either a locally administered address or a Nicira random
117 || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80);
119 static inline bool eth_addr_is_zero(const uint8_t ea[ETH_ADDR_LEN])
121 return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
124 static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN])
126 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
129 static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN],
130 const uint8_t b[ETH_ADDR_LEN])
132 return memcmp(a, b, ETH_ADDR_LEN);
134 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
135 const uint8_t b[ETH_ADDR_LEN])
137 return !eth_addr_compare_3way(a, b);
139 static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN],
140 const uint8_t b[ETH_ADDR_LEN],
141 const uint8_t mask[ETH_ADDR_LEN])
143 return !(((a[0] ^ b[0]) & mask[0])
144 || ((a[1] ^ b[1]) & mask[1])
145 || ((a[2] ^ b[2]) & mask[2])
146 || ((a[3] ^ b[3]) & mask[3])
147 || ((a[4] ^ b[4]) & mask[4])
148 || ((a[5] ^ b[5]) & mask[5]));
150 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
152 return (((uint64_t) ea[0] << 40)
153 | ((uint64_t) ea[1] << 32)
154 | ((uint64_t) ea[2] << 24)
155 | ((uint64_t) ea[3] << 16)
156 | ((uint64_t) ea[4] << 8)
159 static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN],
162 return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea));
164 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
173 static inline void eth_addr_mark_random(uint8_t ea[ETH_ADDR_LEN])
175 ea[0] &= ~1; /* Unicast. */
176 ea[0] |= 2; /* Private. */
178 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
180 random_bytes(ea, ETH_ADDR_LEN);
181 eth_addr_mark_random(ea);
183 static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN])
187 /* Set the OUI to the Nicira one. */
192 /* Set the top bit to indicate random Nicira address. */
195 static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN],
196 const uint16_t vlan, const uint32_t basis)
198 return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis);
201 bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]);
202 bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]);
204 void compose_rarp(struct dp_packet *, const uint8_t eth_src[ETH_ADDR_LEN]);
206 void eth_push_vlan(struct dp_packet *, ovs_be16 tpid, ovs_be16 tci);
207 void eth_pop_vlan(struct dp_packet *);
209 const char *eth_from_hex(const char *hex, struct dp_packet **packetp);
210 void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN],
211 const uint8_t mask[ETH_ADDR_LEN], struct ds *s);
212 void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN],
213 const uint8_t mask[ETH_ADDR_LEN],
214 uint8_t dst[ETH_ADDR_LEN]);
216 void set_mpls_lse(struct dp_packet *, ovs_be32 label);
217 void push_mpls(struct dp_packet *packet, ovs_be16 ethtype, ovs_be32 lse);
218 void pop_mpls(struct dp_packet *, ovs_be16 ethtype);
220 void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl);
221 void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc);
222 void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label);
223 void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos);
224 ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos,
229 * uint8_t mac[ETH_ADDR_LEN];
231 * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
234 #define ETH_ADDR_FMT \
235 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
236 #define ETH_ADDR_ARGS(ea) \
237 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
241 * char *string = "1 00:11:22:33:44:55 2";
242 * uint8_t mac[ETH_ADDR_LEN];
245 * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d",
246 * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) {
250 #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
251 #define ETH_ADDR_SCAN_ARGS(ea) \
252 &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
254 #define ETH_TYPE_IP 0x0800
255 #define ETH_TYPE_ARP 0x0806
256 #define ETH_TYPE_TEB 0x6558
257 #define ETH_TYPE_VLAN_8021Q 0x8100
258 #define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q
259 #define ETH_TYPE_VLAN_8021AD 0x88a8
260 #define ETH_TYPE_IPV6 0x86dd
261 #define ETH_TYPE_LACP 0x8809
262 #define ETH_TYPE_RARP 0x8035
263 #define ETH_TYPE_MPLS 0x8847
264 #define ETH_TYPE_MPLS_MCAST 0x8848
266 static inline bool eth_type_mpls(ovs_be16 eth_type)
268 return eth_type == htons(ETH_TYPE_MPLS) ||
269 eth_type == htons(ETH_TYPE_MPLS_MCAST);
272 static inline bool eth_type_vlan(ovs_be16 eth_type)
274 return eth_type == htons(ETH_TYPE_VLAN_8021Q) ||
275 eth_type == htons(ETH_TYPE_VLAN_8021AD);
279 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
281 #define ETH_TYPE_MIN 0x600
283 #define ETH_HEADER_LEN 14
284 #define ETH_PAYLOAD_MIN 46
285 #define ETH_PAYLOAD_MAX 1500
286 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
287 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
288 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
291 uint8_t eth_dst[ETH_ADDR_LEN];
292 uint8_t eth_src[ETH_ADDR_LEN];
295 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
297 #define LLC_DSAP_SNAP 0xaa
298 #define LLC_SSAP_SNAP 0xaa
299 #define LLC_CNTL_SNAP 3
301 #define LLC_HEADER_LEN 3
308 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
310 /* LLC field values used for STP frames. */
311 #define STP_LLC_SSAP 0x42
312 #define STP_LLC_DSAP 0x42
313 #define STP_LLC_CNTL 0x03
315 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
316 sizeof(SNAP_ORG_ETHERNET) == 3. */
317 #define SNAP_HEADER_LEN 5
323 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
325 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
327 struct llc_snap_header {
328 struct llc_header llc;
329 struct snap_header snap;
331 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
333 #define VLAN_VID_MASK 0x0fff
334 #define VLAN_VID_SHIFT 0
336 #define VLAN_PCP_MASK 0xe000
337 #define VLAN_PCP_SHIFT 13
339 #define VLAN_CFI 0x1000
340 #define VLAN_CFI_SHIFT 12
342 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
343 * returns the VLAN ID in host byte order. */
344 static inline uint16_t
345 vlan_tci_to_vid(ovs_be16 vlan_tci)
347 return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
350 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
351 * returns the priority code point (PCP) in host byte order. */
353 vlan_tci_to_pcp(ovs_be16 vlan_tci)
355 return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
358 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
359 * returns the Canonical Format Indicator (CFI). */
361 vlan_tci_to_cfi(ovs_be16 vlan_tci)
363 return (vlan_tci & htons(VLAN_CFI)) != 0;
366 #define VLAN_HEADER_LEN 4
368 ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */
369 ovs_be16 vlan_next_type;
371 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
373 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
375 struct vlan_eth_header {
376 uint8_t veth_dst[ETH_ADDR_LEN];
377 uint8_t veth_src[ETH_ADDR_LEN];
378 ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */
379 ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */
380 ovs_be16 veth_next_type;
382 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
384 /* MPLS related definitions */
385 #define MPLS_TTL_MASK 0x000000ff
386 #define MPLS_TTL_SHIFT 0
388 #define MPLS_BOS_MASK 0x00000100
389 #define MPLS_BOS_SHIFT 8
391 #define MPLS_TC_MASK 0x00000e00
392 #define MPLS_TC_SHIFT 9
394 #define MPLS_LABEL_MASK 0xfffff000
395 #define MPLS_LABEL_SHIFT 12
400 ovs_16aligned_be32 mpls_lse;
402 BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr));
404 /* Given a mpls label stack entry in network byte order
405 * return mpls label in host byte order */
406 static inline uint32_t
407 mpls_lse_to_label(ovs_be32 mpls_lse)
409 return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT;
412 /* Given a mpls label stack entry in network byte order
414 static inline uint8_t
415 mpls_lse_to_tc(ovs_be32 mpls_lse)
417 return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT;
420 /* Given a mpls label stack entry in network byte order
422 static inline uint8_t
423 mpls_lse_to_ttl(ovs_be32 mpls_lse)
425 return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT;
428 /* Set TTL in mpls lse. */
430 flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl)
432 *mpls_lse &= ~htonl(MPLS_TTL_MASK);
433 *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT);
436 /* Given a mpls label stack entry in network byte order
437 * return mpls BoS bit */
438 static inline uint8_t
439 mpls_lse_to_bos(ovs_be32 mpls_lse)
441 return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0;
444 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
445 #define IP_ARGS(ip) \
447 (ntohl(ip) >> 16) & 0xff, \
448 (ntohl(ip) >> 8) & 0xff, \
453 * char *string = "1 33.44.55.66 2";
457 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
461 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
462 #define IP_SCAN_ARGS(ip) \
463 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
464 &((uint8_t *) ip)[1], \
465 &((uint8_t *) ip)[2], \
468 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
469 * high-order 1-bits and 32-N low-order 0-bits. */
471 ip_is_cidr(ovs_be32 netmask)
473 uint32_t x = ~ntohl(netmask);
474 return !(x & (x + 1));
477 ip_is_multicast(ovs_be32 ip)
479 return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
482 ip_is_local_multicast(ovs_be32 ip)
484 return (ip & htonl(0xffffff00)) == htonl(0xe0000000);
486 int ip_count_cidr_bits(ovs_be32 netmask);
487 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
489 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
490 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
491 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
494 #define IPPROTO_SCTP 132
498 #define IP_ECN_NOT_ECT 0x0
499 #define IP_ECN_ECT_1 0x01
500 #define IP_ECN_ECT_0 0x02
501 #define IP_ECN_CE 0x03
502 #define IP_ECN_MASK 0x03
503 #define IP_DSCP_MASK 0xfc
507 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
508 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
509 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
510 #define IP_IS_FRAGMENT(ip_frag_off) \
511 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
513 #define IP_HEADER_LEN 20
519 ovs_be16 ip_frag_off;
523 ovs_16aligned_be32 ip_src;
524 ovs_16aligned_be32 ip_dst;
527 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
529 #define ICMP_HEADER_LEN 8
543 ovs_16aligned_be32 gateway;
546 BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header));
548 #define IGMP_HEADER_LEN 8
553 ovs_16aligned_be32 group;
555 BUILD_ASSERT_DECL(IGMP_HEADER_LEN == sizeof(struct igmp_header));
557 #define IGMPV3_HEADER_LEN 8
558 struct igmpv3_header {
565 BUILD_ASSERT_DECL(IGMPV3_HEADER_LEN == sizeof(struct igmpv3_header));
567 #define IGMPV3_RECORD_LEN 8
568 struct igmpv3_record {
572 ovs_16aligned_be32 maddr;
574 BUILD_ASSERT_DECL(IGMPV3_RECORD_LEN == sizeof(struct igmpv3_record));
576 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
577 #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
578 #define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */
579 #define IGMP_HOST_LEAVE_MESSAGE 0x17
580 #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */
582 #define IGMPV3_MODE_IS_INCLUDE 1
583 #define IGMPV3_MODE_IS_EXCLUDE 2
584 #define IGMPV3_CHANGE_TO_INCLUDE_MODE 3
585 #define IGMPV3_CHANGE_TO_EXCLUDE_MODE 4
586 #define IGMPV3_ALLOW_NEW_SOURCES 5
587 #define IGMPV3_BLOCK_OLD_SOURCES 6
589 #define SCTP_HEADER_LEN 12
593 ovs_16aligned_be32 sctp_vtag;
594 ovs_16aligned_be32 sctp_csum;
596 BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header));
598 #define UDP_HEADER_LEN 8
605 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
607 #define TCP_FIN 0x001
608 #define TCP_SYN 0x002
609 #define TCP_RST 0x004
610 #define TCP_PSH 0x008
611 #define TCP_ACK 0x010
612 #define TCP_URG 0x020
613 #define TCP_ECE 0x040
614 #define TCP_CWR 0x080
617 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
618 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
619 #define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff))
620 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
622 #define TCP_HEADER_LEN 20
626 ovs_16aligned_be32 tcp_seq;
627 ovs_16aligned_be32 tcp_ack;
633 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
635 #define ARP_HRD_ETHERNET 1
636 #define ARP_PRO_IP 0x0800
637 #define ARP_OP_REQUEST 1
638 #define ARP_OP_REPLY 2
639 #define ARP_OP_RARP 3
641 #define ARP_ETH_HEADER_LEN 28
642 struct arp_eth_header {
643 /* Generic members. */
644 ovs_be16 ar_hrd; /* Hardware type. */
645 ovs_be16 ar_pro; /* Protocol type. */
646 uint8_t ar_hln; /* Hardware address length. */
647 uint8_t ar_pln; /* Protocol address length. */
648 ovs_be16 ar_op; /* Opcode. */
650 /* Ethernet+IPv4 specific members. */
651 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
652 ovs_16aligned_be32 ar_spa; /* Sender protocol address. */
653 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
654 ovs_16aligned_be32 ar_tpa; /* Target protocol address. */
656 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
658 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
659 * most implementations, this one only requires 16-bit alignment. */
660 union ovs_16aligned_in6_addr {
662 ovs_16aligned_be32 be32[4];
665 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
666 * one only requires 16-bit alignment. */
667 struct ovs_16aligned_ip6_hdr {
669 struct ovs_16aligned_ip6_hdrctl {
670 ovs_16aligned_be32 ip6_un1_flow;
671 ovs_be16 ip6_un1_plen;
673 uint8_t ip6_un1_hlim;
677 union ovs_16aligned_in6_addr ip6_src;
678 union ovs_16aligned_in6_addr ip6_dst;
681 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
682 * this one only requires 16-bit alignment. */
683 struct ovs_16aligned_ip6_frag {
685 uint8_t ip6f_reserved;
687 ovs_16aligned_be32 ip6f_ident;
690 #define ICMP6_HEADER_LEN 4
691 struct icmp6_header {
694 ovs_be16 icmp6_cksum;
696 BUILD_ASSERT_DECL(ICMP6_HEADER_LEN == sizeof(struct icmp6_header));
698 /* Neighbor Discovery option field.
699 * ND options are always a multiple of 8 bytes in size. */
702 uint8_t nd_opt_type; /* Values defined in icmp6.h */
703 uint8_t nd_opt_len; /* in units of 8 octets (the size of this struct) */
704 uint8_t nd_opt_data[6]; /* Ethernet address in the case of SLL or TLL options */
706 BUILD_ASSERT_DECL(ND_OPT_LEN == sizeof(struct ovs_nd_opt));
708 /* Like struct nd_msg (from ndisc.h), but whereas that struct requires 32-bit
709 * alignment, this one only requires 16-bit alignment. */
710 #define ND_MSG_LEN 24
712 struct icmp6_header icmph;
713 ovs_16aligned_be32 rco_flags;
714 union ovs_16aligned_in6_addr target;
715 struct ovs_nd_opt options[0];
717 BUILD_ASSERT_DECL(ND_MSG_LEN == sizeof(struct ovs_nd_msg));
719 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
720 #define IPV6_LABEL_MASK 0x000fffff
724 * char *string = "1 ::1 2";
725 * char ipv6_s[IPV6_SCAN_LEN + 1];
726 * struct in6_addr ipv6;
728 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
729 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
733 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
734 #define IPV6_SCAN_LEN 46
736 extern const struct in6_addr in6addr_exact;
737 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
738 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
740 static inline bool ipv6_addr_equals(const struct in6_addr *a,
741 const struct in6_addr *b)
743 #ifdef IN6_ARE_ADDR_EQUAL
744 return IN6_ARE_ADDR_EQUAL(a, b);
746 return !memcmp(a, b, sizeof(*a));
750 static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
751 return ipv6_addr_equals(mask, &in6addr_any);
754 static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
755 return ipv6_addr_equals(mask, &in6addr_exact);
758 static inline bool dl_type_is_ip_any(ovs_be16 dl_type)
760 return dl_type == htons(ETH_TYPE_IP)
761 || dl_type == htons(ETH_TYPE_IPV6);
765 #define GENEVE_MAX_OPT_SIZE 124
766 #define GENEVE_TOT_OPT_SIZE 252
768 #define GENEVE_CRIT_OPT_TYPE (1 << 7)
773 #ifdef WORDS_BIGENDIAN
788 #ifdef WORDS_BIGENDIAN
802 ovs_16aligned_be32 vni;
803 struct geneve_opt options[];
806 /* GRE protocol header */
807 struct gre_base_hdr {
812 #define GRE_CSUM 0x8000
813 #define GRE_ROUTING 0x4000
814 #define GRE_KEY 0x2000
815 #define GRE_SEQ 0x1000
816 #define GRE_STRICT 0x0800
817 #define GRE_REC 0x0700
818 #define GRE_FLAGS 0x00F8
819 #define GRE_VERSION 0x0007
821 /* VXLAN protocol header */
823 ovs_16aligned_be32 vx_flags;
824 ovs_16aligned_be32 vx_vni;
827 #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
829 void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
830 void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
831 void print_ipv6_masked(struct ds *string, const struct in6_addr *addr,
832 const struct in6_addr *mask);
833 struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
834 const struct in6_addr *mask);
835 struct in6_addr ipv6_create_mask(int mask);
836 int ipv6_count_cidr_bits(const struct in6_addr *netmask);
837 bool ipv6_is_cidr(const struct in6_addr *netmask);
839 void *eth_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
840 const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
842 void *snap_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
843 const uint8_t eth_src[ETH_ADDR_LEN],
844 unsigned int oui, uint16_t snap_type, size_t size);
845 void packet_set_ipv4(struct dp_packet *, ovs_be32 src, ovs_be32 dst, uint8_t tos,
847 void packet_set_ipv6(struct dp_packet *, uint8_t proto, const ovs_be32 src[4],
848 const ovs_be32 dst[4], uint8_t tc,
849 ovs_be32 fl, uint8_t hlmit);
850 void packet_set_tcp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
851 void packet_set_udp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
852 void packet_set_sctp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
853 void packet_set_nd(struct dp_packet *, const ovs_be32 target[4],
854 const uint8_t sll[6], const uint8_t tll[6]);
856 void packet_format_tcp_flags(struct ds *, uint16_t);
857 const char *packet_tcp_flag_to_string(uint32_t flag);
858 void compose_arp(struct dp_packet *, uint16_t arp_op,
859 const uint8_t arp_sha[ETH_ADDR_LEN],
860 const uint8_t arp_tha[ETH_ADDR_LEN], bool broadcast,
861 ovs_be32 arp_spa, ovs_be32 arp_tpa);
862 uint32_t packet_csum_pseudoheader(const struct ip_header *);
864 #endif /* packets.h */