forked from osmocom/wireshark
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/** @file
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __INET_IPV6_H__
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#define __INET_IPV6_H__
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#include <glib.h>
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#define IPv6_ADDR_SIZE 16
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#define IPv6_HDR_SIZE 40
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#define IPv6_FRAGMENT_HDR_SIZE 8
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typedef struct e_in6_addr {
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guint8 bytes[16]; /* 128 bit IPv6 address */
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} ws_in6_addr;
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/*
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* Definition for internet protocol version 6.
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* RFC 2460
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*/
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struct ws_ip6_hdr {
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guint32 ip6h_vc_flow; /* version, class, flow */
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guint16 ip6h_plen; /* payload length */
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guint8 ip6h_nxt; /* next header */
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guint8 ip6h_hlim; /* hop limit */
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ws_in6_addr ip6h_src; /* source address */
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ws_in6_addr ip6h_dst; /* destination address */
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};
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/*
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* Extension Headers
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*/
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struct ip6_ext {
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guchar ip6e_nxt;
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guchar ip6e_len;
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};
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/* Routing header */
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struct ip6_rthdr {
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guint8 ip6r_nxt; /* next header */
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guint8 ip6r_len; /* length in units of 8 octets */
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guint8 ip6r_type; /* routing type */
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guint8 ip6r_segleft; /* segments left */
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/* followed by routing type specific data */
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};
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/* Type 0 Routing header */
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struct ip6_rthdr0 {
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guint8 ip6r0_nxt; /* next header */
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guint8 ip6r0_len; /* length in units of 8 octets */
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guint8 ip6r0_type; /* always zero */
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guint8 ip6r0_segleft; /* segments left */
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guint8 ip6r0_reserved; /* reserved field */
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guint8 ip6r0_slmap[3]; /* strict/loose bit map */
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/* followed by up to 127 addresses */
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ws_in6_addr ip6r0_addr[1];
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};
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/* Fragment header */
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struct ip6_frag {
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guint8 ip6f_nxt; /* next header */
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guint8 ip6f_reserved; /* reserved field */
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guint16 ip6f_offlg; /* offset, reserved, and flag */
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guint32 ip6f_ident; /* identification */
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};
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#define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
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#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
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#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
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/**
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* Unicast Scope
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* Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
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*/
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static inline gboolean in6_addr_is_linklocal(const ws_in6_addr *a)
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{
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return (a->bytes[0] == 0xfe) && ((a->bytes[1] & 0xc0) == 0x80);
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}
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static inline gboolean in6_addr_is_sitelocal(const ws_in6_addr *a)
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{
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return (a->bytes[0] == 0xfe) && ((a->bytes[1] & 0xc0) == 0xc0);
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}
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/**
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* Multicast
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*/
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static inline gboolean in6_addr_is_multicast(const ws_in6_addr *a)
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{
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return a->bytes[0] == 0xff;
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}
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#endif
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