drivers/staging/batman-adv/packet.h

   1 /*
   2  * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
   3  *
   4  * Marek Lindner, Simon Wunderlich
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA
  19  *
  20  */
  21
  22 #define ETH_P_BATMAN  0x4305    /* unofficial/not registered Ethertype */
  23
  24 #define BAT_PACKET    0x01
  25 #define BAT_ICMP      0x02
  26 #define BAT_UNICAST   0x03
  27 #define BAT_BCAST     0x04
  28 #define BAT_VIS       0x05
  29
  30 /* this file is included by batctl which needs these defines */
  31 #define COMPAT_VERSION 8
  32 #define DIRECTLINK 0x40
  33 #define VIS_SERVER 0x20
  34
  35 /* ICMP message types */
  36 #define ECHO_REPLY 0
  37 #define DESTINATION_UNREACHABLE 3
  38 #define ECHO_REQUEST 8
  39 #define TTL_EXCEEDED 11
  40 #define PARAMETER_PROBLEM 12
  41
  42 /* vis defines */
  43 #define VIS_TYPE_SERVER_SYNC            0
  44 #define VIS_TYPE_CLIENT_UPDATE          1
  45
  46 struct batman_packet {
  47         uint8_t  packet_type;
  48         uint8_t  version;  /* batman version field */
  49         uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
  50         uint8_t  tq;
  51         uint16_t seqno;
  52         uint8_t  orig[6];
  53         uint8_t  prev_sender[6];
  54         uint8_t  ttl;
  55         uint8_t  num_hna;
  56 } __attribute__((packed));
  57
  58 #define BAT_PACKET_LEN sizeof(struct batman_packet)
  59
  60 struct icmp_packet {
  61         uint8_t  packet_type;
  62         uint8_t  version;  /* batman version field */
  63         uint8_t  msg_type; /* see ICMP message types above */
  64         uint8_t  ttl;
  65         uint8_t  dst[6];
  66         uint8_t  orig[6];
  67         uint16_t seqno;
  68         uint8_t  uid;
  69 } __attribute__((packed));
  70
  71 struct unicast_packet {
  72         uint8_t  packet_type;
  73         uint8_t  version;  /* batman version field */
  74         uint8_t  dest[6];
  75         uint8_t  ttl;
  76 } __attribute__((packed));
  77
  78 struct bcast_packet {
  79         uint8_t  packet_type;
  80         uint8_t  version;  /* batman version field */
  81         uint8_t  orig[6];
  82         uint16_t seqno;
  83 } __attribute__((packed));
  84
  85 struct vis_packet {
  86         uint8_t  packet_type;
  87         uint8_t  version;        /* batman version field */
  88         uint8_t  vis_type;       /* which type of vis-participant sent this? */
  89         uint8_t  seqno;          /* sequence number */
  90         uint8_t  entries;        /* number of entries behind this struct */
  91         uint8_t  ttl;            /* TTL */
  92         uint8_t  vis_orig[6];    /* originator that informs about its
  93                                   * neighbors */
  94         uint8_t  target_orig[6]; /* who should receive this packet */
  95         uint8_t  sender_orig[6]; /* who sent or rebroadcasted this packet */
  96 } __attribute__((packed));