include/netinet/ip6.h

   1 #ifndef _NETINET_IP6_H
   2 #define _NETINET_IP6_H
   3
   4 #ifdef __cplusplus
   5 extern "C" {
   6 #endif
   7
   8 #include <stdint.h>
   9 #include <netinet/in.h>
  10 #include <endian.h>
  11
  12 struct ip6_hdr {
  13         union {
  14                 struct ip6_hdrctl {
  15                         uint32_t ip6_un1_flow;
  16                         uint16_t ip6_un1_plen;
  17                         uint8_t  ip6_un1_nxt;
  18                         uint8_t  ip6_un1_hlim;
  19                 } ip6_un1;
  20                 uint8_t ip6_un2_vfc;
  21         } ip6_ctlun;
  22         struct in6_addr ip6_src;
  23         struct in6_addr ip6_dst;
  24 };
  25
  26 #define ip6_vfc   ip6_ctlun.ip6_un2_vfc
  27 #define ip6_flow  ip6_ctlun.ip6_un1.ip6_un1_flow
  28 #define ip6_plen  ip6_ctlun.ip6_un1.ip6_un1_plen
  29 #define ip6_nxt   ip6_ctlun.ip6_un1.ip6_un1_nxt
  30 #define ip6_hlim  ip6_ctlun.ip6_un1.ip6_un1_hlim
  31 #define ip6_hops  ip6_ctlun.ip6_un1.ip6_un1_hlim
  32
  33 struct ip6_ext {
  34         uint8_t  ip6e_nxt;
  35         uint8_t  ip6e_len;
  36 };
  37
  38 struct ip6_hbh {
  39         uint8_t  ip6h_nxt;
  40         uint8_t  ip6h_len;
  41 };
  42
  43 struct ip6_dest {
  44         uint8_t  ip6d_nxt;
  45         uint8_t  ip6d_len;
  46 };
  47
  48 struct ip6_rthdr {
  49         uint8_t  ip6r_nxt;
  50         uint8_t  ip6r_len;
  51         uint8_t  ip6r_type;
  52         uint8_t  ip6r_segleft;
  53 };
  54
  55 struct ip6_rthdr0 {
  56         uint8_t  ip6r0_nxt;
  57         uint8_t  ip6r0_len;
  58         uint8_t  ip6r0_type;
  59         uint8_t  ip6r0_segleft;
  60         uint8_t  ip6r0_reserved;
  61         uint8_t  ip6r0_slmap[3];
  62         struct in6_addr ip6r0_addr[];
  63 };
  64
  65 struct ip6_frag {
  66         uint8_t   ip6f_nxt;
  67         uint8_t   ip6f_reserved;
  68         uint16_t  ip6f_offlg;
  69         uint32_t  ip6f_ident;
  70 };
  71
  72 #if __BYTE_ORDER == __BIG_ENDIAN
  73 #define IP6F_OFF_MASK       0xfff8
  74 #define IP6F_RESERVED_MASK  0x0006
  75 #define IP6F_MORE_FRAG      0x0001
  76 #else
  77 #define IP6F_OFF_MASK       0xf8ff
  78 #define IP6F_RESERVED_MASK  0x0600
  79 #define IP6F_MORE_FRAG      0x0100
  80 #endif
  81
  82 struct ip6_opt {
  83         uint8_t  ip6o_type;
  84         uint8_t  ip6o_len;
  85 };
  86
  87 #define IP6OPT_TYPE(o)          ((o) & 0xc0)
  88 #define IP6OPT_TYPE_SKIP        0x00
  89 #define IP6OPT_TYPE_DISCARD     0x40
  90 #define IP6OPT_TYPE_FORCEICMP   0x80
  91 #define IP6OPT_TYPE_ICMP        0xc0
  92 #define IP6OPT_TYPE_MUTABLE     0x20
  93
  94 #define IP6OPT_PAD1     0
  95 #define IP6OPT_PADN     1
  96
  97 #define IP6OPT_JUMBO            0xc2
  98 #define IP6OPT_NSAP_ADDR        0xc3
  99 #define IP6OPT_TUNNEL_LIMIT     0x04
 100 #define IP6OPT_ROUTER_ALERT     0x05
 101
 102 struct ip6_opt_jumbo {
 103         uint8_t  ip6oj_type;
 104         uint8_t  ip6oj_len;
 105         uint8_t  ip6oj_jumbo_len[4];
 106 };
 107 #define IP6OPT_JUMBO_LEN        6
 108
 109 struct ip6_opt_nsap {
 110         uint8_t  ip6on_type;
 111         uint8_t  ip6on_len;
 112         uint8_t  ip6on_src_nsap_len;
 113         uint8_t  ip6on_dst_nsap_len;
 114 };
 115
 116 struct ip6_opt_tunnel {
 117         uint8_t  ip6ot_type;
 118         uint8_t  ip6ot_len;
 119         uint8_t  ip6ot_encap_limit;
 120 };
 121
 122 struct ip6_opt_router {
 123         uint8_t  ip6or_type;
 124         uint8_t  ip6or_len;
 125         uint8_t  ip6or_value[2];
 126 };
 127
 128 #if __BYTE_ORDER == __BIG_ENDIAN
 129 #define IP6_ALERT_MLD   0x0000
 130 #define IP6_ALERT_RSVP  0x0001
 131 #define IP6_ALERT_AN    0x0002
 132 #else
 133 #define IP6_ALERT_MLD   0x0000
 134 #define IP6_ALERT_RSVP  0x0100
 135 #define IP6_ALERT_AN    0x0200
 136 #endif
 137
 138 #ifdef __cplusplus
 139 }
 140 #endif
 141
 142 #endif