diff options
Diffstat (limited to 'inet/netinet/ip6.h')
| -rw-r--r-- | inet/netinet/ip6.h | 101 |
1 files changed, 81 insertions, 20 deletions
diff --git a/inet/netinet/ip6.h b/inet/netinet/ip6.h index 2930578e4f..cd42ef64b9 100644 --- a/inet/netinet/ip6.h +++ b/inet/netinet/ip6.h @@ -19,27 +19,88 @@ #ifndef _NETINET_IP6_H #define _NETINET_IP6_H 1 +#include <inttypes.h> #include <netinet/in.h> -#include <endian.h> - -struct ipv6hdr -{ -#if __BYTE_ORDER == __LITTLE_ENDIAN - u_int8_t ipv6_version:4; - u_int8_t ipv6_priority:4; /* going away? */ - u_int32_t ipv6_flowid:24; -#elif __BYTE_ORDER == __BIG_ENDIAN - u_int32_t ipv6_flowid:24; - u_int8_t ipv6_priority:4; /* going away? */ - u_int8_t ipv6_version:4; -#else -# error Unknown endianness + +struct ip6_hdr + { + union + { + struct ip6_hdrctl + { + uint32_t ip6_un1_flow; /* 24 bits of flow-ID */ + uint16_t ip6_un1_plen; /* payload length */ + uint8_t ip6_un1_nxt; /* next header */ + uint8_t ip6_un1_hlim; /* hop limit */ + } ip6_un1; + uint8_t ip6_un2_vfc; /* 4 bits version, 4 bits priority */ + } ip6_ctlun; + struct in6_addr ip6_src; /* source address */ + struct in6_addr ip6_dst; /* destination address */ + }; + +#define ip6_vfc ip6_ctlun.ip6_un2_vfc +#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow +#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen +#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt +#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim +#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim + +/* Hop-by-Hop options header. */ +struct ip6_hbh + { + uint8_t ip6h_nxt; /* next hesder. */ + uint8_t ip6h_len; /* length in units of 8 octets. */ + /* followed by options */ + }; + +/* Destination options header */ +struct ip6_dest + { + uint8_t ip6d_nxt; /* next header */ + uint8_t ip6d_len; /* length in units of 8 octets */ + /* followed by options */ + }; + +/* Routing header */ +struct ip6_rthdr + { + uint8_t ip6r_nxt; /* next header */ + uint8_t ip6r_len; /* length in units of 8 octets */ + uint8_t ip6r_type; /* routing type */ + uint8_t ip6r_segleft; /* segments left */ + /* followed by routing type specific data */ + }; + +/* Type 0 Routing header */ +struct ip6_rthdr0 + { + uint8_t ip6r0_nxt; /* next header */ + uint8_t ip6r0_len; /* length in units of 8 octets */ + uint8_t ip6r0_type; /* always zero */ + uint8_t ip6r0_segleft; /* segments left */ + uint8_t ip6r0_reserved; /* reserved field */ + uint8_t ip6r0_slmap[3]; /* strict/loose bit map */ + struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */ + }; + +/* Fragment header */ +struct ip6_frag + { + uint8_t ip6f_nxt; /* next header */ + uint8_t ip6f_reserved; /* reserved field */ + uint16_t ip6f_offlg; /* offset, reserved, and flag */ + uint32_t ip6f_ident; /* identification */ + }; + +#if BYTE_ORDER == BIG_ENDIAN +#define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */ +#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ +#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ +#else /* BYTE_ORDER == LITTLE_ENDIAN */ +#define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */ +#define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */ +#define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */ #endif - u_int16_t ipv6_len; - u_int8_t ipv6_nextheader; - u_int8_t ipv6_hoplimit; - struct in6_addr ipv6_src; - struct in6_addr ipv6_dst; -}; #endif /* netinet/ip6.h */ |