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         u_int8_t        sub_etc;        /* subtype upper 4 bits, other stuff lower 4 bits */
  49 };
  50
  51 #define MPTCP_OPT_SUBTYPE(sub_etc)      (((sub_etc) >> 4) & 0xF)
  52
  53 struct mp_capable {
  54         u_int8_t        kind;
  55         u_int8_t        len;
  56         u_int8_t        sub_ver;
  57         u_int8_t        flags;
  58         u_int8_t        sender_key[8];
  59         u_int8_t        receiver_key[8];
  60 };
  61
  62 #define MP_CAPABLE_OPT_VERSION(sub_ver) (((sub_ver) >> 0) & 0xF)
  63 #define MP_CAPABLE_C                    0x80
  64 #define MP_CAPABLE_S                    0x01
  65
  66 struct mp_join {
  67         u_int8_t        kind;
  68         u_int8_t        len;
  69         u_int8_t        sub_b;
  70         u_int8_t        addr_id;
  71         union {
  72                 struct {
  73                         u_int8_t         token[4];
  74                         u_int8_t         nonce[4];
  75                 } syn;
  76                 struct {
  77                         u_int8_t         mac[8];
  78                         u_int8_t         nonce[4];
  79                 } synack;
  80                 struct {
  81                         u_int8_t        mac[20];
  82                 } ack;
  83         } u;
  84 };
  85
  86 #define MP_JOIN_B                       0x01
  87
  88 struct mp_dss {
  89         u_int8_t        kind;
  90         u_int8_t        len;
  91         u_int8_t        sub;
  92         u_int8_t        flags;
  93 };
  94
  95 #define MP_DSS_F                        0x10
  96 #define MP_DSS_m                        0x08
  97 #define MP_DSS_M                        0x04
  98 #define MP_DSS_a                        0x02
  99 #define MP_DSS_A                        0x01
 100
 101 struct mp_add_addr {
 102         u_int8_t        kind;
 103         u_int8_t        len;
 104         u_int8_t        sub_ipver;
 105         u_int8_t        addr_id;
 106         union {
 107                 struct {
 108                         u_int8_t         addr[4];
 109                         u_int8_t         port[2];
 110                 } v4;
 111                 struct {
 112                         u_int8_t         addr[16];
 113                         u_int8_t         port[2];
 114                 } v6;
 115         } u;
 116 };
 117
 118 #define MP_ADD_ADDR_IPVER(sub_ipver)    (((sub_ipver) >> 0) & 0xF)
 119
 120 struct mp_remove_addr {
 121         u_int8_t        kind;
 122         u_int8_t        len;
 123         u_int8_t        sub;
 124         /* list of addr_id */
 125         u_int8_t        addrs_id;
 126 };
 127
 128 struct mp_fail {
 129         u_int8_t        kind;
 130         u_int8_t        len;
 131         u_int8_t        sub;
 132         u_int8_t        resv;
 133         u_int8_t        data_seq[8];
 134 };
 135
 136 struct mp_close {
 137         u_int8_t        kind;
 138         u_int8_t        len;
 139         u_int8_t        sub;
 140         u_int8_t        rsv;
 141         u_int8_t        key[8];
 142 };
 143
 144 struct mp_prio {
 145         u_int8_t        kind;
 146         u_int8_t        len;
 147         u_int8_t        sub_b;
 148         u_int8_t        addr_id;
 149 };
 150
 151 #define MP_PRIO_B                       0x01