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inet_ipv6.h
1 /* inet_ipv6.h
2 *
3 * Wireshark - Network traffic analyzer
4 * By Gerald Combs <gerald@wireshark.org>
5 * Copyright 1998 Gerald Combs
6 *
7 * SPDX-License-Identifier: GPL-2.0-or-later
8 */
9
10 #ifndef __INET_IPV6_H__
11 #define __INET_IPV6_H__
12
13 #include <glib.h>
14
15 #define IPv6_ADDR_SIZE 16
16
17 #define IPv6_HDR_SIZE 40
18 #define IPv6_FRAGMENT_HDR_SIZE 8
19
20 typedef struct e_in6_addr {
21 guint8 bytes[16]; /* 128 bit IPv6 address */
22 } ws_in6_addr;
23
24 /*
25 * Definition for internet protocol version 6.
26 * RFC 2460
27 */
28 struct ws_ip6_hdr {
29 guint32 ip6h_vc_flow; /* version, class, flow */
30 guint16 ip6h_plen; /* payload length */
31 guint8 ip6h_nxt; /* next header */
32 guint8 ip6h_hlim; /* hop limit */
33 ws_in6_addr ip6h_src; /* source address */
34 ws_in6_addr ip6h_dst; /* destination address */
35 };
36
37 /*
38 * Extension Headers
39 */
40
41 struct ip6_ext {
42 guchar ip6e_nxt;
43 guchar ip6e_len;
44 };
45
46 /* Routing header */
47 struct ip6_rthdr {
48 guint8 ip6r_nxt; /* next header */
49 guint8 ip6r_len; /* length in units of 8 octets */
50 guint8 ip6r_type; /* routing type */
51 guint8 ip6r_segleft; /* segments left */
52 /* followed by routing type specific data */
53 };
54
55 /* Type 0 Routing header */
56 struct ip6_rthdr0 {
57 guint8 ip6r0_nxt; /* next header */
58 guint8 ip6r0_len; /* length in units of 8 octets */
59 guint8 ip6r0_type; /* always zero */
60 guint8 ip6r0_segleft; /* segments left */
61 guint8 ip6r0_reserved; /* reserved field */
62 guint8 ip6r0_slmap[3]; /* strict/loose bit map */
63 /* followed by up to 127 addresses */
64 ws_in6_addr ip6r0_addr[1];
65 };
66
67 /* Fragment header */
68 struct ip6_frag {
69 guint8 ip6f_nxt; /* next header */
70 guint8 ip6f_reserved; /* reserved field */
71 guint16 ip6f_offlg; /* offset, reserved, and flag */
72 guint32 ip6f_ident; /* identification */
73 };
74
75 #define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
76 #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
77 #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
78
79
84 static inline gboolean in6_addr_is_linklocal(const ws_in6_addr *a)
85 {
86 return (a->bytes[0] == 0xfe) && ((a->bytes[1] & 0xc0) == 0x80);
87 }
88
89 static inline gboolean in6_addr_is_sitelocal(const ws_in6_addr *a)
90 {
91 return (a->bytes[0] == 0xfe) && ((a->bytes[1] & 0xc0) == 0xc0);
92 }
93
97 static inline gboolean in6_addr_is_multicast(const ws_in6_addr *a)
98 {
99 return a->bytes[0] == 0xff;
100 }
101
102 #endif
ip6_rthdr
Definition: inet_ipv6.h:47
e_in6_addr
Definition: inet_ipv6.h:20
ip6_ext
Definition: inet_ipv6.h:41
ip6_rthdr0
Definition: inet_ipv6.h:56
ip6_frag
Definition: inet_ipv6.h:68
ws_ip6_hdr
Definition: inet_ipv6.h:28