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. */
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_stp[ETH_ADDR_LEN] OVS_UNUSED
81 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
83 static const uint8_t eth_addr_lacp[ETH_ADDR_LEN] OVS_UNUSED
84 = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 };
86 static const uint8_t eth_addr_bfd[ETH_ADDR_LEN] OVS_UNUSED
87 = { 0x00, 0x23, 0x20, 0x00, 0x00, 0x01 };
89 static inline bool eth_addr_is_broadcast(const uint8_t ea[ETH_ADDR_LEN])
91 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
94 static inline bool eth_addr_is_multicast(const uint8_t ea[ETH_ADDR_LEN])
98 static inline bool eth_addr_is_local(const uint8_t ea[ETH_ADDR_LEN])
100 /* Local if it is either a locally administered address or a Nicira random
103 || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && ea[3] & 0x80);
105 static inline bool eth_addr_is_zero(const uint8_t ea[ETH_ADDR_LEN])
107 return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
110 static inline int eth_mask_is_exact(const uint8_t ea[ETH_ADDR_LEN])
112 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
115 static inline int eth_addr_compare_3way(const uint8_t a[ETH_ADDR_LEN],
116 const uint8_t b[ETH_ADDR_LEN])
118 return memcmp(a, b, ETH_ADDR_LEN);
120 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
121 const uint8_t b[ETH_ADDR_LEN])
123 return !eth_addr_compare_3way(a, b);
125 static inline bool eth_addr_equal_except(const uint8_t a[ETH_ADDR_LEN],
126 const uint8_t b[ETH_ADDR_LEN],
127 const uint8_t mask[ETH_ADDR_LEN])
129 return !(((a[0] ^ b[0]) & mask[0])
130 || ((a[1] ^ b[1]) & mask[1])
131 || ((a[2] ^ b[2]) & mask[2])
132 || ((a[3] ^ b[3]) & mask[3])
133 || ((a[4] ^ b[4]) & mask[4])
134 || ((a[5] ^ b[5]) & mask[5]));
136 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
138 return (((uint64_t) ea[0] << 40)
139 | ((uint64_t) ea[1] << 32)
140 | ((uint64_t) ea[2] << 24)
141 | ((uint64_t) ea[3] << 16)
142 | ((uint64_t) ea[4] << 8)
145 static inline uint64_t eth_addr_vlan_to_uint64(const uint8_t ea[ETH_ADDR_LEN],
148 return (((uint64_t)vlan << 48) | eth_addr_to_uint64(ea));
150 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
159 static inline void eth_addr_mark_random(uint8_t ea[ETH_ADDR_LEN])
161 ea[0] &= ~1; /* Unicast. */
162 ea[0] |= 2; /* Private. */
164 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
166 random_bytes(ea, ETH_ADDR_LEN);
167 eth_addr_mark_random(ea);
169 static inline void eth_addr_nicira_random(uint8_t ea[ETH_ADDR_LEN])
173 /* Set the OUI to the Nicira one. */
178 /* Set the top bit to indicate random Nicira address. */
181 static inline uint32_t hash_mac(const uint8_t ea[ETH_ADDR_LEN],
182 const uint16_t vlan, const uint32_t basis)
184 return hash_uint64_basis(eth_addr_vlan_to_uint64(ea, vlan), basis);
187 bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN]);
188 bool eth_addr_from_string(const char *, uint8_t ea[ETH_ADDR_LEN]);
190 void compose_rarp(struct dp_packet *, const uint8_t eth_src[ETH_ADDR_LEN]);
192 void eth_push_vlan(struct dp_packet *, ovs_be16 tpid, ovs_be16 tci);
193 void eth_pop_vlan(struct dp_packet *);
195 const char *eth_from_hex(const char *hex, struct dp_packet **packetp);
196 void eth_format_masked(const uint8_t eth[ETH_ADDR_LEN],
197 const uint8_t mask[ETH_ADDR_LEN], struct ds *s);
198 void eth_addr_bitand(const uint8_t src[ETH_ADDR_LEN],
199 const uint8_t mask[ETH_ADDR_LEN],
200 uint8_t dst[ETH_ADDR_LEN]);
202 void set_mpls_lse(struct dp_packet *, ovs_be32 label);
203 void push_mpls(struct dp_packet *packet, ovs_be16 ethtype, ovs_be32 lse);
204 void pop_mpls(struct dp_packet *, ovs_be16 ethtype);
206 void set_mpls_lse_ttl(ovs_be32 *lse, uint8_t ttl);
207 void set_mpls_lse_tc(ovs_be32 *lse, uint8_t tc);
208 void set_mpls_lse_label(ovs_be32 *lse, ovs_be32 label);
209 void set_mpls_lse_bos(ovs_be32 *lse, uint8_t bos);
210 ovs_be32 set_mpls_lse_values(uint8_t ttl, uint8_t tc, uint8_t bos,
215 * uint8_t mac[ETH_ADDR_LEN];
217 * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
220 #define ETH_ADDR_FMT \
221 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
222 #define ETH_ADDR_ARGS(ea) \
223 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
227 * char *string = "1 00:11:22:33:44:55 2";
228 * uint8_t mac[ETH_ADDR_LEN];
231 * if (ovs_scan(string, "%d"ETH_ADDR_SCAN_FMT"%d",
232 * &a, ETH_ADDR_SCAN_ARGS(mac), &b)) {
236 #define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
237 #define ETH_ADDR_SCAN_ARGS(ea) \
238 &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
240 #define ETH_TYPE_IP 0x0800
241 #define ETH_TYPE_ARP 0x0806
242 #define ETH_TYPE_TEB 0x6558
243 #define ETH_TYPE_VLAN_8021Q 0x8100
244 #define ETH_TYPE_VLAN ETH_TYPE_VLAN_8021Q
245 #define ETH_TYPE_VLAN_8021AD 0x88a8
246 #define ETH_TYPE_IPV6 0x86dd
247 #define ETH_TYPE_LACP 0x8809
248 #define ETH_TYPE_RARP 0x8035
249 #define ETH_TYPE_MPLS 0x8847
250 #define ETH_TYPE_MPLS_MCAST 0x8848
252 static inline bool eth_type_mpls(ovs_be16 eth_type)
254 return eth_type == htons(ETH_TYPE_MPLS) ||
255 eth_type == htons(ETH_TYPE_MPLS_MCAST);
258 static inline bool eth_type_vlan(ovs_be16 eth_type)
260 return eth_type == htons(ETH_TYPE_VLAN_8021Q) ||
261 eth_type == htons(ETH_TYPE_VLAN_8021AD);
265 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
267 #define ETH_TYPE_MIN 0x600
269 #define ETH_HEADER_LEN 14
270 #define ETH_PAYLOAD_MIN 46
271 #define ETH_PAYLOAD_MAX 1500
272 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
273 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
274 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
277 uint8_t eth_dst[ETH_ADDR_LEN];
278 uint8_t eth_src[ETH_ADDR_LEN];
281 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
283 #define LLC_DSAP_SNAP 0xaa
284 #define LLC_SSAP_SNAP 0xaa
285 #define LLC_CNTL_SNAP 3
287 #define LLC_HEADER_LEN 3
294 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
296 /* LLC field values used for STP frames. */
297 #define STP_LLC_SSAP 0x42
298 #define STP_LLC_DSAP 0x42
299 #define STP_LLC_CNTL 0x03
301 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
302 sizeof(SNAP_ORG_ETHERNET) == 3. */
303 #define SNAP_HEADER_LEN 5
309 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
311 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
313 struct llc_snap_header {
314 struct llc_header llc;
315 struct snap_header snap;
317 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
319 #define VLAN_VID_MASK 0x0fff
320 #define VLAN_VID_SHIFT 0
322 #define VLAN_PCP_MASK 0xe000
323 #define VLAN_PCP_SHIFT 13
325 #define VLAN_CFI 0x1000
326 #define VLAN_CFI_SHIFT 12
328 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
329 * returns the VLAN ID in host byte order. */
330 static inline uint16_t
331 vlan_tci_to_vid(ovs_be16 vlan_tci)
333 return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
336 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
337 * returns the priority code point (PCP) in host byte order. */
339 vlan_tci_to_pcp(ovs_be16 vlan_tci)
341 return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
344 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
345 * returns the Canonical Format Indicator (CFI). */
347 vlan_tci_to_cfi(ovs_be16 vlan_tci)
349 return (vlan_tci & htons(VLAN_CFI)) != 0;
352 #define VLAN_HEADER_LEN 4
354 ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */
355 ovs_be16 vlan_next_type;
357 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
359 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
361 struct vlan_eth_header {
362 uint8_t veth_dst[ETH_ADDR_LEN];
363 uint8_t veth_src[ETH_ADDR_LEN];
364 ovs_be16 veth_type; /* Always htons(ETH_TYPE_VLAN). */
365 ovs_be16 veth_tci; /* Lowest 12 bits are VLAN ID. */
366 ovs_be16 veth_next_type;
368 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
370 /* MPLS related definitions */
371 #define MPLS_TTL_MASK 0x000000ff
372 #define MPLS_TTL_SHIFT 0
374 #define MPLS_BOS_MASK 0x00000100
375 #define MPLS_BOS_SHIFT 8
377 #define MPLS_TC_MASK 0x00000e00
378 #define MPLS_TC_SHIFT 9
380 #define MPLS_LABEL_MASK 0xfffff000
381 #define MPLS_LABEL_SHIFT 12
386 ovs_16aligned_be32 mpls_lse;
388 BUILD_ASSERT_DECL(MPLS_HLEN == sizeof(struct mpls_hdr));
390 /* Given a mpls label stack entry in network byte order
391 * return mpls label in host byte order */
392 static inline uint32_t
393 mpls_lse_to_label(ovs_be32 mpls_lse)
395 return (ntohl(mpls_lse) & MPLS_LABEL_MASK) >> MPLS_LABEL_SHIFT;
398 /* Given a mpls label stack entry in network byte order
400 static inline uint8_t
401 mpls_lse_to_tc(ovs_be32 mpls_lse)
403 return (ntohl(mpls_lse) & MPLS_TC_MASK) >> MPLS_TC_SHIFT;
406 /* Given a mpls label stack entry in network byte order
408 static inline uint8_t
409 mpls_lse_to_ttl(ovs_be32 mpls_lse)
411 return (ntohl(mpls_lse) & MPLS_TTL_MASK) >> MPLS_TTL_SHIFT;
414 /* Set TTL in mpls lse. */
416 flow_set_mpls_lse_ttl(ovs_be32 *mpls_lse, uint8_t ttl)
418 *mpls_lse &= ~htonl(MPLS_TTL_MASK);
419 *mpls_lse |= htonl(ttl << MPLS_TTL_SHIFT);
422 /* Given a mpls label stack entry in network byte order
423 * return mpls BoS bit */
424 static inline uint8_t
425 mpls_lse_to_bos(ovs_be32 mpls_lse)
427 return (mpls_lse & htonl(MPLS_BOS_MASK)) != 0;
430 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
431 #define IP_ARGS(ip) \
433 (ntohl(ip) >> 16) & 0xff, \
434 (ntohl(ip) >> 8) & 0xff, \
439 * char *string = "1 33.44.55.66 2";
443 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
447 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
448 #define IP_SCAN_ARGS(ip) \
449 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
450 &((uint8_t *) ip)[1], \
451 &((uint8_t *) ip)[2], \
454 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
455 * high-order 1-bits and 32-N low-order 0-bits. */
457 ip_is_cidr(ovs_be32 netmask)
459 uint32_t x = ~ntohl(netmask);
460 return !(x & (x + 1));
463 ip_is_multicast(ovs_be32 ip)
465 return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
468 ip_is_local_multicast(ovs_be32 ip)
470 return (ip & htonl(0xffffff00)) == htonl(0xe0000000);
472 int ip_count_cidr_bits(ovs_be32 netmask);
473 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);
475 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
476 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
477 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
480 #define IPPROTO_SCTP 132
484 #define IP_ECN_NOT_ECT 0x0
485 #define IP_ECN_ECT_1 0x01
486 #define IP_ECN_ECT_0 0x02
487 #define IP_ECN_CE 0x03
488 #define IP_ECN_MASK 0x03
489 #define IP_DSCP_MASK 0xfc
493 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
494 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
495 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
496 #define IP_IS_FRAGMENT(ip_frag_off) \
497 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
499 #define IP_HEADER_LEN 20
505 ovs_be16 ip_frag_off;
509 ovs_16aligned_be32 ip_src;
510 ovs_16aligned_be32 ip_dst;
513 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
515 #define ICMP_HEADER_LEN 8
529 ovs_16aligned_be32 gateway;
532 BUILD_ASSERT_DECL(ICMP_HEADER_LEN == sizeof(struct icmp_header));
534 #define IGMP_HEADER_LEN 8
539 ovs_16aligned_be32 group;
541 BUILD_ASSERT_DECL(IGMP_HEADER_LEN == sizeof(struct igmp_header));
543 #define IGMPV3_HEADER_LEN 8
544 struct igmpv3_header {
551 BUILD_ASSERT_DECL(IGMPV3_HEADER_LEN == sizeof(struct igmpv3_header));
553 #define IGMPV3_RECORD_LEN 8
554 struct igmpv3_record {
558 ovs_16aligned_be32 maddr;
560 BUILD_ASSERT_DECL(IGMPV3_RECORD_LEN == sizeof(struct igmpv3_record));
562 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
563 #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
564 #define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */
565 #define IGMP_HOST_LEAVE_MESSAGE 0x17
566 #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */
568 #define IGMPV3_MODE_IS_INCLUDE 1
569 #define IGMPV3_MODE_IS_EXCLUDE 2
570 #define IGMPV3_CHANGE_TO_INCLUDE_MODE 3
571 #define IGMPV3_CHANGE_TO_EXCLUDE_MODE 4
572 #define IGMPV3_ALLOW_NEW_SOURCES 5
573 #define IGMPV3_BLOCK_OLD_SOURCES 6
575 #define SCTP_HEADER_LEN 12
579 ovs_16aligned_be32 sctp_vtag;
580 ovs_16aligned_be32 sctp_csum;
582 BUILD_ASSERT_DECL(SCTP_HEADER_LEN == sizeof(struct sctp_header));
584 #define UDP_HEADER_LEN 8
591 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
593 #define TCP_FIN 0x001
594 #define TCP_SYN 0x002
595 #define TCP_RST 0x004
596 #define TCP_PSH 0x008
597 #define TCP_ACK 0x010
598 #define TCP_URG 0x020
599 #define TCP_ECE 0x040
600 #define TCP_CWR 0x080
603 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
604 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
605 #define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff))
606 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
608 #define TCP_HEADER_LEN 20
612 ovs_16aligned_be32 tcp_seq;
613 ovs_16aligned_be32 tcp_ack;
619 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
621 #define ARP_HRD_ETHERNET 1
622 #define ARP_PRO_IP 0x0800
623 #define ARP_OP_REQUEST 1
624 #define ARP_OP_REPLY 2
625 #define ARP_OP_RARP 3
627 #define ARP_ETH_HEADER_LEN 28
628 struct arp_eth_header {
629 /* Generic members. */
630 ovs_be16 ar_hrd; /* Hardware type. */
631 ovs_be16 ar_pro; /* Protocol type. */
632 uint8_t ar_hln; /* Hardware address length. */
633 uint8_t ar_pln; /* Protocol address length. */
634 ovs_be16 ar_op; /* Opcode. */
636 /* Ethernet+IPv4 specific members. */
637 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
638 ovs_16aligned_be32 ar_spa; /* Sender protocol address. */
639 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
640 ovs_16aligned_be32 ar_tpa; /* Target protocol address. */
642 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
644 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
645 * most implementations, this one only requires 16-bit alignment. */
646 union ovs_16aligned_in6_addr {
648 ovs_16aligned_be32 be32[4];
651 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
652 * one only requires 16-bit alignment. */
653 struct ovs_16aligned_ip6_hdr {
655 struct ovs_16aligned_ip6_hdrctl {
656 ovs_16aligned_be32 ip6_un1_flow;
657 ovs_be16 ip6_un1_plen;
659 uint8_t ip6_un1_hlim;
663 union ovs_16aligned_in6_addr ip6_src;
664 union ovs_16aligned_in6_addr ip6_dst;
667 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
668 * this one only requires 16-bit alignment. */
669 struct ovs_16aligned_ip6_frag {
671 uint8_t ip6f_reserved;
673 ovs_16aligned_be32 ip6f_ident;
676 #define ICMP6_HEADER_LEN 4
677 struct icmp6_header {
680 ovs_be16 icmp6_cksum;
682 BUILD_ASSERT_DECL(ICMP6_HEADER_LEN == sizeof(struct icmp6_header));
684 /* Neighbor Discovery option field.
685 * ND options are always a multiple of 8 bytes in size. */
688 uint8_t nd_opt_type; /* Values defined in icmp6.h */
689 uint8_t nd_opt_len; /* in units of 8 octets (the size of this struct) */
690 uint8_t nd_opt_data[6]; /* Ethernet address in the case of SLL or TLL options */
692 BUILD_ASSERT_DECL(ND_OPT_LEN == sizeof(struct ovs_nd_opt));
694 /* Like struct nd_msg (from ndisc.h), but whereas that struct requires 32-bit
695 * alignment, this one only requires 16-bit alignment. */
696 #define ND_MSG_LEN 24
698 struct icmp6_header icmph;
699 ovs_16aligned_be32 rco_flags;
700 union ovs_16aligned_in6_addr target;
701 struct ovs_nd_opt options[0];
703 BUILD_ASSERT_DECL(ND_MSG_LEN == sizeof(struct ovs_nd_msg));
705 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
706 #define IPV6_LABEL_MASK 0x000fffff
710 * char *string = "1 ::1 2";
711 * char ipv6_s[IPV6_SCAN_LEN + 1];
712 * struct in6_addr ipv6;
714 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
715 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
719 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
720 #define IPV6_SCAN_LEN 46
722 extern const struct in6_addr in6addr_exact;
723 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
724 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
726 static inline bool ipv6_addr_equals(const struct in6_addr *a,
727 const struct in6_addr *b)
729 #ifdef IN6_ARE_ADDR_EQUAL
730 return IN6_ARE_ADDR_EQUAL(a, b);
732 return !memcmp(a, b, sizeof(*a));
736 static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
737 return ipv6_addr_equals(mask, &in6addr_any);
740 static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
741 return ipv6_addr_equals(mask, &in6addr_exact);
744 static inline bool dl_type_is_ip_any(ovs_be16 dl_type)
746 return dl_type == htons(ETH_TYPE_IP)
747 || dl_type == htons(ETH_TYPE_IPV6);
751 #define GENEVE_CRIT_OPT_TYPE (1 << 7)
755 #ifdef WORDS_BIGENDIAN
770 #ifdef WORDS_BIGENDIAN
784 ovs_16aligned_be32 vni;
785 struct geneve_opt options[];
788 /* GRE protocol header */
789 struct gre_base_hdr {
794 #define GRE_CSUM 0x8000
795 #define GRE_ROUTING 0x4000
796 #define GRE_KEY 0x2000
797 #define GRE_SEQ 0x1000
798 #define GRE_STRICT 0x0800
799 #define GRE_REC 0x0700
800 #define GRE_FLAGS 0x00F8
801 #define GRE_VERSION 0x0007
803 /* VXLAN protocol header */
805 ovs_16aligned_be32 vx_flags;
806 ovs_16aligned_be32 vx_vni;
809 #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
811 void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
812 void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
813 void print_ipv6_masked(struct ds *string, const struct in6_addr *addr,
814 const struct in6_addr *mask);
815 struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
816 const struct in6_addr *mask);
817 struct in6_addr ipv6_create_mask(int mask);
818 int ipv6_count_cidr_bits(const struct in6_addr *netmask);
819 bool ipv6_is_cidr(const struct in6_addr *netmask);
821 void *eth_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
822 const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
824 void *snap_compose(struct dp_packet *, const uint8_t eth_dst[ETH_ADDR_LEN],
825 const uint8_t eth_src[ETH_ADDR_LEN],
826 unsigned int oui, uint16_t snap_type, size_t size);
827 void packet_set_ipv4(struct dp_packet *, ovs_be32 src, ovs_be32 dst, uint8_t tos,
829 void packet_set_ipv6(struct dp_packet *, uint8_t proto, const ovs_be32 src[4],
830 const ovs_be32 dst[4], uint8_t tc,
831 ovs_be32 fl, uint8_t hlmit);
832 void packet_set_tcp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
833 void packet_set_udp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
834 void packet_set_sctp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
835 void packet_set_nd(struct dp_packet *, const ovs_be32 target[4],
836 const uint8_t sll[6], const uint8_t tll[6]);
838 void packet_format_tcp_flags(struct ds *, uint16_t);
839 const char *packet_tcp_flag_to_string(uint32_t flag);
840 void compose_arp(struct dp_packet *b, const uint8_t eth_src[ETH_ADDR_LEN],
841 ovs_be32 ip_src, ovs_be32 ip_dst);
842 uint32_t packet_csum_pseudoheader(const struct ip_header *);
844 #endif /* packets.h */