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 /* Minimum value for an Ethernet type. Values below this are IEEE 802.2 frame
260 #define ETH_TYPE_MIN 0x600
262 #define ETH_HEADER_LEN 14
263 #define ETH_PAYLOAD_MIN 46
264 #define ETH_PAYLOAD_MAX 1500
265 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
266 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
267 #define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
270 uint8_t eth_dst
[ETH_ADDR_LEN
];
271 uint8_t eth_src
[ETH_ADDR_LEN
];
274 BUILD_ASSERT_DECL(ETH_HEADER_LEN
== sizeof(struct eth_header
));
276 #define LLC_DSAP_SNAP 0xaa
277 #define LLC_SSAP_SNAP 0xaa
278 #define LLC_CNTL_SNAP 3
280 #define LLC_HEADER_LEN 3
287 BUILD_ASSERT_DECL(LLC_HEADER_LEN
== sizeof(struct llc_header
));
289 /* LLC field values used for STP frames. */
290 #define STP_LLC_SSAP 0x42
291 #define STP_LLC_DSAP 0x42
292 #define STP_LLC_CNTL 0x03
294 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
295 sizeof(SNAP_ORG_ETHERNET) == 3. */
296 #define SNAP_HEADER_LEN 5
302 BUILD_ASSERT_DECL(SNAP_HEADER_LEN
== sizeof(struct snap_header
));
304 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
306 struct llc_snap_header
{
307 struct llc_header llc
;
308 struct snap_header snap
;
310 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN
== sizeof(struct llc_snap_header
));
312 #define VLAN_VID_MASK 0x0fff
313 #define VLAN_VID_SHIFT 0
315 #define VLAN_PCP_MASK 0xe000
316 #define VLAN_PCP_SHIFT 13
318 #define VLAN_CFI 0x1000
319 #define VLAN_CFI_SHIFT 12
321 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
322 * returns the VLAN ID in host byte order. */
323 static inline uint16_t
324 vlan_tci_to_vid(ovs_be16 vlan_tci
)
326 return (ntohs(vlan_tci
) & VLAN_VID_MASK
) >> VLAN_VID_SHIFT
;
329 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
330 * returns the priority code point (PCP) in host byte order. */
332 vlan_tci_to_pcp(ovs_be16 vlan_tci
)
334 return (ntohs(vlan_tci
) & VLAN_PCP_MASK
) >> VLAN_PCP_SHIFT
;
337 /* Given the vlan_tci field from an 802.1Q header, in network byte order,
338 * returns the Canonical Format Indicator (CFI). */
340 vlan_tci_to_cfi(ovs_be16 vlan_tci
)
342 return (vlan_tci
& htons(VLAN_CFI
)) != 0;
345 #define VLAN_HEADER_LEN 4
347 ovs_be16 vlan_tci
; /* Lowest 12 bits are VLAN ID. */
348 ovs_be16 vlan_next_type
;
350 BUILD_ASSERT_DECL(VLAN_HEADER_LEN
== sizeof(struct vlan_header
));
352 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
354 struct vlan_eth_header
{
355 uint8_t veth_dst
[ETH_ADDR_LEN
];
356 uint8_t veth_src
[ETH_ADDR_LEN
];
357 ovs_be16 veth_type
; /* Always htons(ETH_TYPE_VLAN). */
358 ovs_be16 veth_tci
; /* Lowest 12 bits are VLAN ID. */
359 ovs_be16 veth_next_type
;
361 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN
== sizeof(struct vlan_eth_header
));
363 /* MPLS related definitions */
364 #define MPLS_TTL_MASK 0x000000ff
365 #define MPLS_TTL_SHIFT 0
367 #define MPLS_BOS_MASK 0x00000100
368 #define MPLS_BOS_SHIFT 8
370 #define MPLS_TC_MASK 0x00000e00
371 #define MPLS_TC_SHIFT 9
373 #define MPLS_LABEL_MASK 0xfffff000
374 #define MPLS_LABEL_SHIFT 12
379 ovs_16aligned_be32 mpls_lse
;
381 BUILD_ASSERT_DECL(MPLS_HLEN
== sizeof(struct mpls_hdr
));
383 /* Given a mpls label stack entry in network byte order
384 * return mpls label in host byte order */
385 static inline uint32_t
386 mpls_lse_to_label(ovs_be32 mpls_lse
)
388 return (ntohl(mpls_lse
) & MPLS_LABEL_MASK
) >> MPLS_LABEL_SHIFT
;
391 /* Given a mpls label stack entry in network byte order
393 static inline uint8_t
394 mpls_lse_to_tc(ovs_be32 mpls_lse
)
396 return (ntohl(mpls_lse
) & MPLS_TC_MASK
) >> MPLS_TC_SHIFT
;
399 /* Given a mpls label stack entry in network byte order
401 static inline uint8_t
402 mpls_lse_to_ttl(ovs_be32 mpls_lse
)
404 return (ntohl(mpls_lse
) & MPLS_TTL_MASK
) >> MPLS_TTL_SHIFT
;
407 /* Set TTL in mpls lse. */
409 flow_set_mpls_lse_ttl(ovs_be32
*mpls_lse
, uint8_t ttl
)
411 *mpls_lse
&= ~htonl(MPLS_TTL_MASK
);
412 *mpls_lse
|= htonl(ttl
<< MPLS_TTL_SHIFT
);
415 /* Given a mpls label stack entry in network byte order
416 * return mpls BoS bit */
417 static inline uint8_t
418 mpls_lse_to_bos(ovs_be32 mpls_lse
)
420 return (mpls_lse
& htonl(MPLS_BOS_MASK
)) != 0;
423 #define IP_FMT "%"PRIu32".%"PRIu32".%"PRIu32".%"PRIu32
424 #define IP_ARGS(ip) \
426 (ntohl(ip) >> 16) & 0xff, \
427 (ntohl(ip) >> 8) & 0xff, \
432 * char *string = "1 33.44.55.66 2";
436 * if (ovs_scan(string, "%d"IP_SCAN_FMT"%d", &a, IP_SCAN_ARGS(&ip), &b)) {
440 #define IP_SCAN_FMT "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8
441 #define IP_SCAN_ARGS(ip) \
442 ((void) (ovs_be32) *(ip), &((uint8_t *) ip)[0]), \
443 &((uint8_t *) ip)[1], \
444 &((uint8_t *) ip)[2], \
447 /* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
448 * high-order 1-bits and 32-N low-order 0-bits. */
450 ip_is_cidr(ovs_be32 netmask
)
452 uint32_t x
= ~ntohl(netmask
);
453 return !(x
& (x
+ 1));
456 ip_is_multicast(ovs_be32 ip
)
458 return (ip
& htonl(0xf0000000)) == htonl(0xe0000000);
461 ip_is_local_multicast(ovs_be32 ip
)
463 return (ip
& htonl(0xffffff00)) == htonl(0xe0000000);
465 int ip_count_cidr_bits(ovs_be32 netmask
);
466 void ip_format_masked(ovs_be32 ip
, ovs_be32 mask
, struct ds
*);
468 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
469 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
470 #define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
473 #define IPPROTO_SCTP 132
477 #define IP_ECN_NOT_ECT 0x0
478 #define IP_ECN_ECT_1 0x01
479 #define IP_ECN_ECT_0 0x02
480 #define IP_ECN_CE 0x03
481 #define IP_ECN_MASK 0x03
482 #define IP_DSCP_MASK 0xfc
486 #define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
487 #define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
488 #define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
489 #define IP_IS_FRAGMENT(ip_frag_off) \
490 ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
492 #define IP_HEADER_LEN 20
498 ovs_be16 ip_frag_off
;
502 ovs_16aligned_be32 ip_src
;
503 ovs_16aligned_be32 ip_dst
;
506 BUILD_ASSERT_DECL(IP_HEADER_LEN
== sizeof(struct ip_header
));
508 #define ICMP_HEADER_LEN 8
522 ovs_16aligned_be32 gateway
;
525 BUILD_ASSERT_DECL(ICMP_HEADER_LEN
== sizeof(struct icmp_header
));
527 #define IGMP_HEADER_LEN 8
532 ovs_16aligned_be32 group
;
534 BUILD_ASSERT_DECL(IGMP_HEADER_LEN
== sizeof(struct igmp_header
));
536 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
537 #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
538 #define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */
539 #define IGMP_HOST_LEAVE_MESSAGE 0x17
540 #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */
542 #define SCTP_HEADER_LEN 12
546 ovs_16aligned_be32 sctp_vtag
;
547 ovs_16aligned_be32 sctp_csum
;
549 BUILD_ASSERT_DECL(SCTP_HEADER_LEN
== sizeof(struct sctp_header
));
551 #define UDP_HEADER_LEN 8
558 BUILD_ASSERT_DECL(UDP_HEADER_LEN
== sizeof(struct udp_header
));
560 #define TCP_FIN 0x001
561 #define TCP_SYN 0x002
562 #define TCP_RST 0x004
563 #define TCP_PSH 0x008
564 #define TCP_ACK 0x010
565 #define TCP_URG 0x020
566 #define TCP_ECE 0x040
567 #define TCP_CWR 0x080
570 #define TCP_CTL(flags, offset) (htons((flags) | ((offset) << 12)))
571 #define TCP_FLAGS(tcp_ctl) (ntohs(tcp_ctl) & 0x0fff)
572 #define TCP_FLAGS_BE16(tcp_ctl) ((tcp_ctl) & htons(0x0fff))
573 #define TCP_OFFSET(tcp_ctl) (ntohs(tcp_ctl) >> 12)
575 #define TCP_HEADER_LEN 20
579 ovs_16aligned_be32 tcp_seq
;
580 ovs_16aligned_be32 tcp_ack
;
586 BUILD_ASSERT_DECL(TCP_HEADER_LEN
== sizeof(struct tcp_header
));
588 #define ARP_HRD_ETHERNET 1
589 #define ARP_PRO_IP 0x0800
590 #define ARP_OP_REQUEST 1
591 #define ARP_OP_REPLY 2
592 #define ARP_OP_RARP 3
594 #define ARP_ETH_HEADER_LEN 28
595 struct arp_eth_header
{
596 /* Generic members. */
597 ovs_be16 ar_hrd
; /* Hardware type. */
598 ovs_be16 ar_pro
; /* Protocol type. */
599 uint8_t ar_hln
; /* Hardware address length. */
600 uint8_t ar_pln
; /* Protocol address length. */
601 ovs_be16 ar_op
; /* Opcode. */
603 /* Ethernet+IPv4 specific members. */
604 uint8_t ar_sha
[ETH_ADDR_LEN
]; /* Sender hardware address. */
605 ovs_16aligned_be32 ar_spa
; /* Sender protocol address. */
606 uint8_t ar_tha
[ETH_ADDR_LEN
]; /* Target hardware address. */
607 ovs_16aligned_be32 ar_tpa
; /* Target protocol address. */
609 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN
== sizeof(struct arp_eth_header
));
611 /* Like struct in6_addr, but whereas that struct requires 32-bit alignment on
612 * most implementations, this one only requires 16-bit alignment. */
613 union ovs_16aligned_in6_addr
{
615 ovs_16aligned_be32 be32
[4];
618 /* Like struct in6_hdr, but whereas that struct requires 32-bit alignment, this
619 * one only requires 16-bit alignment. */
620 struct ovs_16aligned_ip6_hdr
{
622 struct ovs_16aligned_ip6_hdrctl
{
623 ovs_16aligned_be32 ip6_un1_flow
;
624 ovs_be16 ip6_un1_plen
;
626 uint8_t ip6_un1_hlim
;
630 union ovs_16aligned_in6_addr ip6_src
;
631 union ovs_16aligned_in6_addr ip6_dst
;
634 /* Like struct in6_frag, but whereas that struct requires 32-bit alignment,
635 * this one only requires 16-bit alignment. */
636 struct ovs_16aligned_ip6_frag
{
638 uint8_t ip6f_reserved
;
640 ovs_16aligned_be32 ip6f_ident
;
643 #define ICMP6_HEADER_LEN 4
644 struct icmp6_header
{
647 ovs_be16 icmp6_cksum
;
649 BUILD_ASSERT_DECL(ICMP6_HEADER_LEN
== sizeof(struct icmp6_header
));
651 /* Neighbor Discovery option field.
652 * ND options are always a multiple of 8 bytes in size. */
655 uint8_t nd_opt_type
; /* Values defined in icmp6.h */
656 uint8_t nd_opt_len
; /* in units of 8 octets (the size of this struct) */
657 uint8_t nd_opt_data
[6]; /* Ethernet address in the case of SLL or TLL options */
659 BUILD_ASSERT_DECL(ND_OPT_LEN
== sizeof(struct ovs_nd_opt
));
661 /* Like struct nd_msg (from ndisc.h), but whereas that struct requires 32-bit
662 * alignment, this one only requires 16-bit alignment. */
663 #define ND_MSG_LEN 24
665 struct icmp6_header icmph
;
666 ovs_16aligned_be32 rco_flags
;
667 union ovs_16aligned_in6_addr target
;
668 struct ovs_nd_opt options
[0];
670 BUILD_ASSERT_DECL(ND_MSG_LEN
== sizeof(struct ovs_nd_msg
));
672 /* The IPv6 flow label is in the lower 20 bits of the first 32-bit word. */
673 #define IPV6_LABEL_MASK 0x000fffff
677 * char *string = "1 ::1 2";
678 * char ipv6_s[IPV6_SCAN_LEN + 1];
679 * struct in6_addr ipv6;
681 * if (ovs_scan(string, "%d"IPV6_SCAN_FMT"%d", &a, ipv6_s, &b)
682 * && inet_pton(AF_INET6, ipv6_s, &ipv6) == 1) {
686 #define IPV6_SCAN_FMT "%46[0123456789abcdefABCDEF:.]"
687 #define IPV6_SCAN_LEN 46
689 extern const struct in6_addr in6addr_exact
;
690 #define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
691 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
693 static inline bool ipv6_addr_equals(const struct in6_addr
*a
,
694 const struct in6_addr
*b
)
696 #ifdef IN6_ARE_ADDR_EQUAL
697 return IN6_ARE_ADDR_EQUAL(a
, b
);
699 return !memcmp(a
, b
, sizeof(*a
));
703 static inline bool ipv6_mask_is_any(const struct in6_addr
*mask
) {
704 return ipv6_addr_equals(mask
, &in6addr_any
);
707 static inline bool ipv6_mask_is_exact(const struct in6_addr
*mask
) {
708 return ipv6_addr_equals(mask
, &in6addr_exact
);
711 static inline bool dl_type_is_ip_any(ovs_be16 dl_type
)
713 return dl_type
== htons(ETH_TYPE_IP
)
714 || dl_type
== htons(ETH_TYPE_IPV6
);
718 #define GENEVE_CRIT_OPT_TYPE (1 << 7)
722 #ifdef WORDS_BIGENDIAN
737 #ifdef WORDS_BIGENDIAN
751 ovs_16aligned_be32 vni
;
752 struct geneve_opt options
[];
755 /* GRE protocol header */
756 struct gre_base_hdr
{
761 #define GRE_CSUM 0x8000
762 #define GRE_ROUTING 0x4000
763 #define GRE_KEY 0x2000
764 #define GRE_SEQ 0x1000
765 #define GRE_STRICT 0x0800
766 #define GRE_REC 0x0700
767 #define GRE_FLAGS 0x00F8
768 #define GRE_VERSION 0x0007
770 /* VXLAN protocol header */
772 ovs_16aligned_be32 vx_flags
;
773 ovs_16aligned_be32 vx_vni
;
776 #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
778 void format_ipv6_addr(char *addr_str
, const struct in6_addr
*addr
);
779 void print_ipv6_addr(struct ds
*string
, const struct in6_addr
*addr
);
780 void print_ipv6_masked(struct ds
*string
, const struct in6_addr
*addr
,
781 const struct in6_addr
*mask
);
782 struct in6_addr
ipv6_addr_bitand(const struct in6_addr
*src
,
783 const struct in6_addr
*mask
);
784 struct in6_addr
ipv6_create_mask(int mask
);
785 int ipv6_count_cidr_bits(const struct in6_addr
*netmask
);
786 bool ipv6_is_cidr(const struct in6_addr
*netmask
);
788 void *eth_compose(struct dp_packet
*, const uint8_t eth_dst
[ETH_ADDR_LEN
],
789 const uint8_t eth_src
[ETH_ADDR_LEN
], uint16_t eth_type
,
791 void *snap_compose(struct dp_packet
*, const uint8_t eth_dst
[ETH_ADDR_LEN
],
792 const uint8_t eth_src
[ETH_ADDR_LEN
],
793 unsigned int oui
, uint16_t snap_type
, size_t size
);
794 void packet_set_ipv4(struct dp_packet
*, ovs_be32 src
, ovs_be32 dst
, uint8_t tos
,
796 void packet_set_ipv6(struct dp_packet
*, uint8_t proto
, const ovs_be32 src
[4],
797 const ovs_be32 dst
[4], uint8_t tc
,
798 ovs_be32 fl
, uint8_t hlmit
);
799 void packet_set_tcp_port(struct dp_packet
*, ovs_be16 src
, ovs_be16 dst
);
800 void packet_set_udp_port(struct dp_packet
*, ovs_be16 src
, ovs_be16 dst
);
801 void packet_set_sctp_port(struct dp_packet
*, ovs_be16 src
, ovs_be16 dst
);
802 void packet_set_nd(struct dp_packet
*, const ovs_be32 target
[4],
803 const uint8_t sll
[6], const uint8_t tll
[6]);
805 void packet_format_tcp_flags(struct ds
*, uint16_t);
806 const char *packet_tcp_flag_to_string(uint32_t flag
);
807 void compose_arp(struct dp_packet
*b
, const uint8_t eth_src
[ETH_ADDR_LEN
],
808 ovs_be32 ip_src
, ovs_be32 ip_dst
);
809 uint32_t packet_csum_pseudoheader(const struct ip_header
*);
811 #endif /* packets.h */