The Tcpdump Group git mirrors - tcpdump/blob - mptcp.h

   1 /**
   2  * Copyright (c) 2012
   3  *
   4  * Gregory Detal <gregory.detal@uclouvain.be>
   5  * Christoph Paasch <christoph.paasch@uclouvain.be>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * 3. Neither the name of the University nor of the Laboratory may be used
  19  *    to endorse or promote products derived from this software without
  20  *    specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #define MPTCP_SUB_CAPABLE       0x0
  36 #define MPTCP_SUB_JOIN          0x1
  37 #define MPTCP_SUB_DSS           0x2
  38 #define MPTCP_SUB_ADD_ADDR      0x3
  39 #define MPTCP_SUB_REMOVE_ADDR   0x4
  40 #define MPTCP_SUB_PRIO          0x5
  41 #define MPTCP_SUB_FAIL          0x6
  42 #define MPTCP_SUB_FCLOSE        0x7
  43
  44
  45 struct mptcp_option {
  46         u_int8_t        kind;
  47         u_int8_t        len;
  48 #if !LBL_ALIGN
  49         u_int8_t        ver:4,
  50                         sub:4;
  51 #else
  52         u_int8_t        sub:4,
  53                         ver:4;
  54 #endif
  55 };
  56
  57 struct mp_capable {
  58         u_int8_t        kind;
  59         u_int8_t        len;
  60 #if !LBL_ALIGN
  61         u_int8_t        ver:4,
  62                         sub:4;
  63         u_int8_t        s:1,
  64                         rsv:6,
  65                         c:1;
  66 #else
  67         u_int8_t        sub:4,
  68                         ver:4;
  69         u_int8_t        c:1,
  70                         rsv:6,
  71                         s:1;
  72 #endif
  73         u_int64_t        sender_key;
  74         u_int64_t        receiver_key;
  75 } __attribute__((__packed__));
  76
  77 struct mp_join {
  78         u_int8_t        kind;
  79         u_int8_t        len;
  80 #if !LBL_ALIGN
  81         u_int8_t        b:1,
  82                         rsv:3,
  83                         sub:4;
  84 #else
  85         u_int8_t        sub:4,
  86                         rsv:3,
  87                         b:1;
  88 #endif
  89         u_int8_t        addr_id;
  90         union {
  91                 struct {
  92                         u_int32_t        token;
  93                         u_int32_t        nonce;
  94                 } syn;
  95                 struct {
  96                         u_int64_t        mac;
  97                         u_int32_t        nonce;
  98                 } synack;
  99                 struct {
 100                         u_int8_t        mac[20];
 101                 } ack;
 102         } u;
 103 } __attribute__((__packed__));
 104
 105 struct mp_dss {
 106         u_int8_t        kind;
 107         u_int8_t        len;
 108 #if !LBL_ALIGN
 109         u_int16_t        rsv1:4,
 110                         sub:4,
 111                         A:1,
 112                         a:1,
 113                         M:1,
 114                         m:1,
 115                         F:1,
 116                         rsv2:3;
 117 #else
 118         u_int16_t        sub:4,
 119                         rsv1:4,
 120                         rsv2:3,
 121                         F:1,
 122                         m:1,
 123                         M:1,
 124                         a:1,
 125                         A:1;
 126 #endif
 127 };
 128
 129 struct mp_add_addr {
 130         u_int8_t        kind;
 131         u_int8_t        len;
 132 #if !LBL_ALIGN
 133         u_int8_t        ipver:4,
 134                         sub:4;
 135 #else
 136         u_int8_t        sub:4,
 137                         ipver:4;
 138 #endif
 139         u_int8_t        addr_id;
 140         union {
 141                 struct {
 142                         struct in_addr   addr;
 143                         u_int16_t        port;
 144                 } v4;
 145                 struct {
 146                         struct in6_addr  addr;
 147                         u_int16_t        port;
 148                 } v6;
 149         } u;
 150 } __attribute__((__packed__));
 151
 152 struct mp_remove_addr {
 153         u_int8_t        kind;
 154         u_int8_t        len;
 155 #if !LBL_ALIGN
 156         u_int8_t        rsv:4,
 157                         sub:4;
 158 #else
 159         u_int8_t        sub:4,
 160                         rsv:4;
 161 #endif
 162         /* list of addr_id */
 163         u_int8_t        addrs_id;
 164 };
 165
 166 struct mp_fail {
 167         u_int8_t        kind;
 168         u_int8_t        len;
 169 #if !LBL_ALIGN
 170         u_int16_t       rsv1:4,
 171                         sub:4,
 172                         rsv2:8;
 173 #else
 174         u_int16_t       sub:4,
 175                         rsv1:4,
 176                         rsv2:8;
 177 #endif
 178         u_int64_t        data_seq;
 179 } __attribute__((__packed__));
 180
 181 struct mp_fclose {
 182         u_int8_t        kind;
 183         u_int8_t        len;
 184 #if !LBL_ALIGN
 185         u_int16_t       rsv1:4,
 186                         sub:4,
 187                         rsv2:8;
 188 #else
 189         u_int16_t       sub:4,
 190                         rsv1:4,
 191                         rsv2:8;
 192 #endif
 193         u_int64_t        key;
 194 } __attribute__((__packed__));
 195
 196 struct mp_prio {
 197         u_int8_t        kind;
 198         u_int8_t        len;
 199 #if !LBL_ALIGN
 200         u_int8_t        b:1,
 201                         rsv:3,
 202                         sub:4;
 203 #else
 204         u_int8_t        sub:4,
 205                         rsv:3,
 206                         b:1;
 207 #endif
 208         u_int8_t        addr_id;
 209 } __attribute__((__packed__));
 210