Wireshark  2.9.0-477-g68ec514b
The Wireshark network protocol analyzer
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
Definition: inet_ipv6.h:47
Definition: inet_ipv6.h:20
Definition: inet_ipv6.h:41
Definition: inet_ipv6.h:56
Definition: inet_ipv6.h:68
Definition: inet_ipv6.h:28