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. */
72 #define PKT_METADATA_INITIALIZER(PORT) \
73 (struct pkt_metadata){ .in_port.odp_port = PORT }
75 bool dpid_from_string(const char *s, uint64_t *dpidp);
77 #define ETH_ADDR_LEN 6
79 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED
80 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
82 static const uint8_t eth_addr_zero[ETH_ADDR_LEN] OVS_UNUSED
83 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
85 static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED
86 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
88 static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED
89 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 };
91 static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED
92 = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 };
94 static inline bool eth_addr_is_broadcast(const uint8_t ea[ETH_ADDR_LEN])
96 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
99 static inline bool eth_addr_is_multicast(const uint8_t ea[ETH_ADDR_LEN])
103 static inline bool eth_addr_is_local(const uint8_t ea[ETH_ADDR_LEN])
105 /* Local if it is either a locally administered address or a Nicira random
108 || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80);
110 static inline bool eth_addr_is_zero(const uint8_t ea[ETH_ADDR_LEN])
112 return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
115 static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN])
117 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
120 static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN],
121 const uint8_t b[ETH_ADDR_LEN])
123 return memcmp(a, b, ETH_ADDR_LEN);
125 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
126 const uint8_t b[ETH_ADDR_LEN])
128 return !eth_addr_compare_3way(a, b);
130 static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN],
131 const uint8_t b[ETH_ADDR_LEN],
132 const uint8_t mask[ETH_ADDR_LEN])
134 return !(((a[0] ^ b[0]) & mask[0])
135 || ((a[1] ^ b[1]) & mask[1])
136 || ((a[2] ^ b[2]) & mask[2])
137 || ((a[3] ^ b[3]) & mask[3])
138 || ((a[4] ^ b[4]) & mask[4])
139 || ((a[5] ^ b[5]) & mask[5]));
141 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
143 return (((uint64_t) ea[0] << 40)
144 | ((uint64_t) ea[1] << 32)
145 | ((uint64_t) ea[2] << 24)
146 | ((uint64_t) ea[3] << 16)
147 | ((uint64_t) ea[4] << 8)
150 static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN],
153 return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea));
155 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
164 static inline void eth_addr_mark_random(uint8_t ea[ETH_ADDR_LEN])
166 ea[0] &= ~1; /* Unicast. */
167 ea[0] |= 2; /* Private. */
169 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
171 random_bytes(ea, ETH_ADDR_LEN);
172 eth_addr_mark_random(ea);
174 static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN])
178 /* Set the OUI to the Nicira one. */
183 /* Set the top bit to indicate random Nicira address. */
186 static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN],
187 const uint16_t vlan, const uint32_t basis)
189 return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis);
192 bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]);
193 bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]);
195 void compose_rarp(struct dp_packet *, const uint8_t eth_src[ETH_ADDR_LEN]);
197 void eth_push_vlan(struct dp_packet *, ovs_be16 tpid, ovs_be16 tci);
198 void eth_pop_vlan(struct dp_packet *);
200 const char *eth_from_hex(const char *hex, struct dp_packet **packetp);
201 void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN],
202 const uint8_t mask[ETH_ADDR_LEN], struct ds *s);
203 void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN],
204 const uint8_t mask[ETH_ADDR_LEN],
205 uint8_t dst[ETH_ADDR_LEN]);
207 void set_mpls_lse(struct dp_packet *, ovs_be32 label);
208 void push_mpls(struct dp_packet *packet, ovs_be16 ethtype, ovs_be32 lse);
209 void pop_mpls(struct dp_packet *, ovs_be16 ethtype);
211 void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl);
212 void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc);
213 void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label);
214 void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos);
215 ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos,
220 * uint8_t mac[ETH_ADDR_LEN];
222 * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
225 #define ETH_ADDR_FMT \
226 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
227 #define ETH_ADDR_ARGS(ea) \
228 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
232 * char *string = "1 00:11:22:33:44:55 2";
233 * uint8_t mac[ETH_ADDR_LEN];
236 * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d",
237 * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) {
241 #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
242 #define ETH_ADDR_SCAN_ARGS(ea) \
243 &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
245 #define ETH_TYPE_IP 0x0800
246 #define ETH_TYPE_ARP 0x0806
247 #define ETH_TYPE_TEB 0x6558
248 #define ETH_TYPE_VLAN_8021Q 0x8100
249 #define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q
250 #define ETH_TYPE_VLAN_8021AD 0x88a8
251 #define ETH_TYPE_IPV6 0x86dd
252 #define ETH_TYPE_LACP 0x8809
253 #define ETH_TYPE_RARP 0x8035
254 #define ETH_TYPE_MPLS 0x8847
255 #define ETH_TYPE_MPLS_MCAST 0x8848
257 static inline bool eth_type_mpls(ovs_be16 eth_type)
259 return eth_type == htons(ETH_TYPE_MPLS) ||
260 eth_type == htons(ETH_TYPE_MPLS_MCAST);
263 static inline bool eth_type_vlan(ovs_be16 eth_type)
265 return eth_type == htons(ETH_TYPE_VLAN_8021Q) ||
266 eth_type == htons(ETH_TYPE_VLAN_8021AD);
270 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
272 #define ETH_TYPE_MIN 0x600
274 #define ETH_HEADER_LEN 14
275 #define ETH_PAYLOAD_MIN 46
276 #define ETH_PAYLOAD_MAX 1500
277 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
278 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
279 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
282 uint8_t eth_dst[ETH_ADDR_LEN];
283 uint8_t eth_src[ETH_ADDR_LEN];
286 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
288 #define LLC_DSAP_SNAP 0xaa
289 #define LLC_SSAP_SNAP 0xaa
290 #define LLC_CNTL_SNAP 3
292 #define LLC_HEADER_LEN 3
299 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
301 /* LLC field values used for STP frames. */
302 #define STP_LLC_SSAP 0x42
303 #define STP_LLC_DSAP 0x42
304 #define STP_LLC_CNTL 0x03
306 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
307 sizeof(SNAP_ORG_ETHERNET) == 3. */
308 #define SNAP_HEADER_LEN 5
314 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
316 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
318 struct llc_snap_header {
319 struct llc_header llc;
320 struct snap_header snap;
322 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
324 #define VLAN_VID_MASK 0x0fff
325 #define VLAN_VID_SHIFT 0
327 #define VLAN_PCP_MASK 0xe000
328 #define VLAN_PCP_SHIFT 13
330 #define VLAN_CFI 0x1000
331 #define VLAN_CFI_SHIFT 12
333 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
334 * returns the VLAN ID in host byte order. */
335 static inline uint16_t
336 vlan_tci_to_vid(ovs_be16 vlan_tci)
338 return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
341 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
342 * returns the priority code point (PCP) in host byte order. */
344 vlan_tci_to_pcp(ovs_be16 vlan_tci)
346 return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
349 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
350 * returns the Canonical Format Indicator (CFI). */
352 vlan_tci_to_cfi(ovs_be16 vlan_tci)
354 return (vlan_tci & htons(VLAN_CFI)) != 0;
357 #define VLAN_HEADER_LEN 4
359 ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */
360 ovs_be16 vlan_next_type;
362 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
364 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
366 struct vlan_eth_header {
367 uint8_t veth_dst[ETH_ADDR_LEN];
368 uint8_t veth_src[ETH_ADDR_LEN];
369 ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */
370 ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */
371 ovs_be16 veth_next_type;
373 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
375 /* MPLS related definitions */
376 #define MPLS_TTL_MASK 0x000000ff
377 #define MPLS_TTL_SHIFT 0
379 #define MPLS_BOS_MASK 0x00000100
380 #define MPLS_BOS_SHIFT 8
382 #define MPLS_TC_MASK 0x00000e00
383 #define MPLS_TC_SHIFT 9
385 #define MPLS_LABEL_MASK 0xfffff000
386 #define MPLS_LABEL_SHIFT 12
391 ovs_16aligned_be32 mpls_lse;
393 BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr));
395 /* Given a mpls label stack entry in network byte order
396 * return mpls label in host byte order */
397 static inline uint32_t
398 mpls_lse_to_label(ovs_be32 mpls_lse)
400 return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT;
403 /* Given a mpls label stack entry in network byte order
405 static inline uint8_t
406 mpls_lse_to_tc(ovs_be32 mpls_lse)
408 return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT;
411 /* Given a mpls label stack entry in network byte order
413 static inline uint8_t
414 mpls_lse_to_ttl(ovs_be32 mpls_lse)
416 return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT;
419 /* Set TTL in mpls lse. */
421 flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl)
423 *mpls_lse &= ~htonl(MPLS_TTL_MASK);
424 *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT);
427 /* Given a mpls label stack entry in network byte order
428 * return mpls BoS bit */
429 static inline uint8_t
430 mpls_lse_to_bos(ovs_be32 mpls_lse)
432 return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0;
435 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
436 #define IP_ARGS(ip) \
438 (ntohl(ip) >> 16) & 0xff, \
439 (ntohl(ip) >> 8) & 0xff, \
444 * char *string = "1 33.44.55.66 2";
448 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
452 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
453 #define IP_SCAN_ARGS(ip) \
454 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
455 &((uint8_t *) ip)[1], \
456 &((uint8_t *) ip)[2], \
459 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
460 * high-order 1-bits and 32-N low-order 0-bits. */
462 ip_is_cidr(ovs_be32 netmask)
464 uint32_t x = ~ntohl(netmask);
465 return !(x & (x + 1));
468 ip_is_multicast(ovs_be32 ip)
470 return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
473 ip_is_local_multicast(ovs_be32 ip)
475 return (ip & htonl(0xffffff00)) == htonl(0xe0000000);
477 int ip_count_cidr_bits(ovs_be32 netmask);
478 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
480 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
481 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
482 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
485 #define IPPROTO_SCTP 132
489 #define IP_ECN_NOT_ECT 0x0
490 #define IP_ECN_ECT_1 0x01
491 #define IP_ECN_ECT_0 0x02
492 #define IP_ECN_CE 0x03
493 #define IP_ECN_MASK 0x03
494 #define IP_DSCP_MASK 0xfc
498 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
499 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
500 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
501 #define IP_IS_FRAGMENT(ip_frag_off) \
502 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
504 #define IP_HEADER_LEN 20
510 ovs_be16 ip_frag_off;
514 ovs_16aligned_be32 ip_src;
515 ovs_16aligned_be32 ip_dst;
518 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
520 #define ICMP_HEADER_LEN 8
534 ovs_16aligned_be32 gateway;
537 BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header));
539 #define IGMP_HEADER_LEN 8
544 ovs_16aligned_be32 group;
546 BUILD_ASSERT_DECL(IGMP_HEADER_LEN == sizeof(struct igmp_header));
548 #define IGMPV3_HEADER_LEN 8
549 struct igmpv3_header {
556 BUILD_ASSERT_DECL(IGMPV3_HEADER_LEN == sizeof(struct igmpv3_header));
558 #define IGMPV3_RECORD_LEN 8
559 struct igmpv3_record {
563 ovs_16aligned_be32 maddr;
565 BUILD_ASSERT_DECL(IGMPV3_RECORD_LEN == sizeof(struct igmpv3_record));
567 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
568 #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
569 #define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */
570 #define IGMP_HOST_LEAVE_MESSAGE 0x17
571 #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */
573 #define IGMPV3_MODE_IS_INCLUDE 1
574 #define IGMPV3_MODE_IS_EXCLUDE 2
575 #define IGMPV3_CHANGE_TO_INCLUDE_MODE 3
576 #define IGMPV3_CHANGE_TO_EXCLUDE_MODE 4
577 #define IGMPV3_ALLOW_NEW_SOURCES 5
578 #define IGMPV3_BLOCK_OLD_SOURCES 6
580 #define SCTP_HEADER_LEN 12
584 ovs_16aligned_be32 sctp_vtag;
585 ovs_16aligned_be32 sctp_csum;
587 BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header));
589 #define UDP_HEADER_LEN 8
596 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
598 #define TCP_FIN 0x001
599 #define TCP_SYN 0x002
600 #define TCP_RST 0x004
601 #define TCP_PSH 0x008
602 #define TCP_ACK 0x010
603 #define TCP_URG 0x020
604 #define TCP_ECE 0x040
605 #define TCP_CWR 0x080
608 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
609 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
610 #define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff))
611 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
613 #define TCP_HEADER_LEN 20
617 ovs_16aligned_be32 tcp_seq;
618 ovs_16aligned_be32 tcp_ack;
624 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
626 #define ARP_HRD_ETHERNET 1
627 #define ARP_PRO_IP 0x0800
628 #define ARP_OP_REQUEST 1
629 #define ARP_OP_REPLY 2
630 #define ARP_OP_RARP 3
632 #define ARP_ETH_HEADER_LEN 28
633 struct arp_eth_header {
634 /* Generic members. */
635 ovs_be16 ar_hrd; /* Hardware type. */
636 ovs_be16 ar_pro; /* Protocol type. */
637 uint8_t ar_hln; /* Hardware address length. */
638 uint8_t ar_pln; /* Protocol address length. */
639 ovs_be16 ar_op; /* Opcode. */
641 /* Ethernet+IPv4 specific members. */
642 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
643 ovs_16aligned_be32 ar_spa; /* Sender protocol address. */
644 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
645 ovs_16aligned_be32 ar_tpa; /* Target protocol address. */
647 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
649 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
650 * most implementations, this one only requires 16-bit alignment. */
651 union ovs_16aligned_in6_addr {
653 ovs_16aligned_be32 be32[4];
656 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
657 * one only requires 16-bit alignment. */
658 struct ovs_16aligned_ip6_hdr {
660 struct ovs_16aligned_ip6_hdrctl {
661 ovs_16aligned_be32 ip6_un1_flow;
662 ovs_be16 ip6_un1_plen;
664 uint8_t ip6_un1_hlim;
668 union ovs_16aligned_in6_addr ip6_src;
669 union ovs_16aligned_in6_addr ip6_dst;
672 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
673 * this one only requires 16-bit alignment. */
674 struct ovs_16aligned_ip6_frag {
676 uint8_t ip6f_reserved;
678 ovs_16aligned_be32 ip6f_ident;
681 #define ICMP6_HEADER_LEN 4
682 struct icmp6_header {
685 ovs_be16 icmp6_cksum;
687 BUILD_ASSERT_DECL(ICMP6_HEADER_LEN == sizeof(struct icmp6_header));
689 /* Neighbor Discovery option field.
690 * ND options are always a multiple of 8 bytes in size. */
693 uint8_t nd_opt_type; /* Values defined in icmp6.h */
694 uint8_t nd_opt_len; /* in units of 8 octets (the size of this struct) */
695 uint8_t nd_opt_data[6]; /* Ethernet address in the case of SLL or TLL options */
697 BUILD_ASSERT_DECL(ND_OPT_LEN == sizeof(struct ovs_nd_opt));
699 /* Like struct nd_msg (from ndisc.h), but whereas that struct requires 32-bit
700 * alignment, this one only requires 16-bit alignment. */
701 #define ND_MSG_LEN 24
703 struct icmp6_header icmph;
704 ovs_16aligned_be32 rco_flags;
705 union ovs_16aligned_in6_addr target;
706 struct ovs_nd_opt options[0];
708 BUILD_ASSERT_DECL(ND_MSG_LEN == sizeof(struct ovs_nd_msg));
710 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
711 #define IPV6_LABEL_MASK 0x000fffff
715 * char *string = "1 ::1 2";
716 * char ipv6_s[IPV6_SCAN_LEN + 1];
717 * struct in6_addr ipv6;
719 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
720 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
724 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
725 #define IPV6_SCAN_LEN 46
727 extern const struct in6_addr in6addr_exact;
728 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
729 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
731 static inline bool ipv6_addr_equals(const struct in6_addr *a,
732 const struct in6_addr *b)
734 #ifdef IN6_ARE_ADDR_EQUAL
735 return IN6_ARE_ADDR_EQUAL(a, b);
737 return !memcmp(a, b, sizeof(*a));
741 static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
742 return ipv6_addr_equals(mask, &in6addr_any);
745 static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
746 return ipv6_addr_equals(mask, &in6addr_exact);
749 static inline bool dl_type_is_ip_any(ovs_be16 dl_type)
751 return dl_type == htons(ETH_TYPE_IP)
752 || dl_type == htons(ETH_TYPE_IPV6);
756 #define GENEVE_MAX_OPT_SIZE 124
757 #define GENEVE_TOT_OPT_SIZE 252
759 #define GENEVE_CRIT_OPT_TYPE (1 << 7)
764 #ifdef WORDS_BIGENDIAN
779 #ifdef WORDS_BIGENDIAN
793 ovs_16aligned_be32 vni;
794 struct geneve_opt options[];
797 /* GRE protocol header */
798 struct gre_base_hdr {
803 #define GRE_CSUM 0x8000
804 #define GRE_ROUTING 0x4000
805 #define GRE_KEY 0x2000
806 #define GRE_SEQ 0x1000
807 #define GRE_STRICT 0x0800
808 #define GRE_REC 0x0700
809 #define GRE_FLAGS 0x00F8
810 #define GRE_VERSION 0x0007
812 /* VXLAN protocol header */
814 ovs_16aligned_be32 vx_flags;
815 ovs_16aligned_be32 vx_vni;
818 #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
820 void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
821 void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
822 void print_ipv6_masked(struct ds *string, const struct in6_addr *addr,
823 const struct in6_addr *mask);
824 struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
825 const struct in6_addr *mask);
826 struct in6_addr ipv6_create_mask(int mask);
827 int ipv6_count_cidr_bits(const struct in6_addr *netmask);
828 bool ipv6_is_cidr(const struct in6_addr *netmask);
830 void *eth_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
831 const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
833 void *snap_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
834 const uint8_t eth_src[ETH_ADDR_LEN],
835 unsigned int oui, uint16_t snap_type, size_t size);
836 void packet_set_ipv4(struct dp_packet *, ovs_be32 src, ovs_be32 dst, uint8_t tos,
838 void packet_set_ipv6(struct dp_packet *, uint8_t proto, const ovs_be32 src[4],
839 const ovs_be32 dst[4], uint8_t tc,
840 ovs_be32 fl, uint8_t hlmit);
841 void packet_set_tcp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
842 void packet_set_udp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
843 void packet_set_sctp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
844 void packet_set_nd(struct dp_packet *, const ovs_be32 target[4],
845 const uint8_t sll[6], const uint8_t tll[6]);
847 void packet_format_tcp_flags(struct ds *, uint16_t);
848 const char *packet_tcp_flag_to_string(uint32_t flag);
849 void compose_arp(struct dp_packet *, uint16_t arp_op,
850 const uint8_t arp_sha[ETH_ADDR_LEN],
851 const uint8_t arp_tha[ETH_ADDR_LEN], bool broadcast,
852 ovs_be32 arp_spa, ovs_be32 arp_tpa);
853 uint32_t packet_csum_pseudoheader(const struct ip_header *);
855 #endif /* packets.h */