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phoenix |
//==========================================================================
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//
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// include/netinet6_ipv6.h
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//
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//
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//
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//==========================================================================
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//####BSDCOPYRIGHTBEGIN####
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//
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// -------------------------------------------
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//
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// Portions of this software may have been derived from OpenBSD or other sources,
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// and are covered by the appropriate copyright disclaimers included herein.
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//
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// -------------------------------------------
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//
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//####BSDCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): gthomas
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// Contributors: gthomas
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// Date: 2000-01-10
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// Purpose:
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// Description:
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//
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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/*
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%%% copyright-nrl-95
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This software is Copyright 1995-1998 by Randall Atkinson, Ronald Lee,
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Daniel McDonald, Bao Phan, and Chris Winters. All Rights Reserved. All
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rights under this copyright have been assigned to the US Naval Research
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Laboratory (NRL). The NRL Copyright Notice and License Agreement Version
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1.1 (January 17, 1995) applies to this software.
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You should have received a copy of the license with this software. If you
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didn't get a copy, you may request one from <license@ipv6.nrl.navy.mil>.
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*/
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#ifndef _NETINET6_IPV6_H
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#define _NETINET6_IPV6_H 1
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#define IPV6VERSION 6
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/*
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* Header structures.
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*/
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struct ipv6
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{
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uint32_t ipv6_versfl; /* Version and flow label word. */
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uint16_t ipv6_length; /* Datagram length (not including the length
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of this header). */
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uint8_t ipv6_nexthdr; /* Next header type. */
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uint8_t ipv6_hoplimit; /* Hop limit. */
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struct in6_addr ipv6_src; /* Source address. */
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struct in6_addr ipv6_dst; /* Destination address. */
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};
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#if __linux__
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#include <endian.h>
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#else /* __linux__ */
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#include <machine/endian.h>
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#endif /* __linux__ */
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struct ipv6hdr {
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#if BYTE_ORDER == LITTLE_ENDIAN
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uint8_t ipv6_priority:4; /* going away? */
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uint8_t ipv6_version:4;
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uint32_t ipv6_flowid:24;
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#elif BYTE_ORDER == BIG_ENDIAN
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uint32_t ipv6_flowid:24;
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uint8_t ipv6_priority:4; /* going away? */
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uint8_t ipv6_version:4;
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#else
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#error "Don't know what endian to use."
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#endif
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uint16_t ipv6_len;
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uint8_t ipv6_nextheader;
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uint8_t ipv6_hoplimit;
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struct in6_addr ipv6_src; /* source address */
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struct in6_addr ipv6_dst; /* destination address */
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};
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/*
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* Macros and defines for header fields, and values thereof.
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* Assume things are in host order for these three macros.
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*/
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#define IPV6_VERSION(h) ((h)->ipv6_versfl >> 28)
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#define IPV6_PRIORITY(h) (((h)->ipv6_versfl & 0x0f000000) >> 24)
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#define IPV6_FLOWID(h) ((h)->ipv6_versfl & 0x00ffffff)
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#define MAXHOPLIMIT 64
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#define IPV6_MINMTU 576
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/*
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* Other IPv6 header definitions.
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*/
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/* Fragmentation header & macros for it. NOTE: Host order assumption. */
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struct ipv6_fraghdr
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{
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uint8_t frag_nexthdr; /* Next header type. */
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uint8_t frag_reserved;
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uint16_t frag_bitsoffset; /* More bit and fragment offset. */
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uint32_t frag_id; /* Fragment identifier. */
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};
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#define FRAG_MOREMASK 0x1
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#define FRAG_OFFMASK 0xFFF8
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#define FRAG_MORE_BIT(fh) ((fh)->frag_bitsoffset & FRAG_MOREMASK)
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#define FRAG_OFFSET(fh) ((fh)->frag_bitsoffset & FRAG_OFFMASK)
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/* Source routing header. Host order assumption for macros. */
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struct ipv6_srcroute0
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{
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uint8_t i6sr_nexthdr; /* Next header type. */
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uint8_t i6sr_len; /* RH len in 8-byte addrs, !incl this structure */
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uint8_t i6sr_type; /* Routing type, should be 0 */
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uint8_t i6sr_left; /* Segments left */
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uint32_t i6sr_reserved; /* 8 bits of reserved padding. */
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};
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#define I6SR_BITMASK(i6sr) ((i6sr)->i6sr_reserved & 0xffffff)
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/* Options header. For "ignoreable" options. */
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struct ipv6_opthdr
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{
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uint8_t oh_nexthdr; /* Next header type. */
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uint8_t oh_extlen; /* Header extension length. */
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uint8_t oh_data[6]; /* Option data, may be reserved for
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alignment purposes. */
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};
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#define OPT_PAD1 0
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#define OPT_PADN 1
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#define OPT_JUMBO 194
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struct ipv6_option
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{
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uint8_t opt_type; /* Option type. */
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uint8_t opt_datalen; /* Option data length. */
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uint8_t opt_data[1]; /* Option data. */
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};
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#endif /* _NETINET6_IPV6_H */
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