linux/net/batman-adv/packet.h
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   1/* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
   2 *
   3 * Marek Lindner, Simon Wunderlich
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of version 2 of the GNU General Public
   7 * License as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful, but
  10 * WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12 * General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17 * 02110-1301, USA
  18 */
  19
  20#ifndef _NET_BATMAN_ADV_PACKET_H_
  21#define _NET_BATMAN_ADV_PACKET_H_
  22
  23#define BATADV_ETH_P_BATMAN  0x4305 /* unofficial/not registered Ethertype */
  24
  25enum batadv_packettype {
  26        BATADV_IV_OGM       = 0x01,
  27        BATADV_ICMP         = 0x02,
  28        BATADV_UNICAST      = 0x03,
  29        BATADV_BCAST        = 0x04,
  30        BATADV_VIS          = 0x05,
  31        BATADV_UNICAST_FRAG = 0x06,
  32        BATADV_TT_QUERY     = 0x07,
  33        BATADV_ROAM_ADV     = 0x08,
  34};
  35
  36/* this file is included by batctl which needs these defines */
  37#define BATADV_COMPAT_VERSION 14
  38
  39enum batadv_iv_flags {
  40        BATADV_NOT_BEST_NEXT_HOP   = 1 << 3,
  41        BATADV_PRIMARIES_FIRST_HOP = 1 << 4,
  42        BATADV_VIS_SERVER          = 1 << 5,
  43        BATADV_DIRECTLINK          = 1 << 6,
  44};
  45
  46/* ICMP message types */
  47enum batadv_icmp_packettype {
  48        BATADV_ECHO_REPLY              = 0,
  49        BATADV_DESTINATION_UNREACHABLE = 3,
  50        BATADV_ECHO_REQUEST            = 8,
  51        BATADV_TTL_EXCEEDED            = 11,
  52        BATADV_PARAMETER_PROBLEM       = 12,
  53};
  54
  55/* vis defines */
  56enum batadv_vis_packettype {
  57        BATADV_VIS_TYPE_SERVER_SYNC   = 0,
  58        BATADV_VIS_TYPE_CLIENT_UPDATE = 1,
  59};
  60
  61/* fragmentation defines */
  62enum batadv_unicast_frag_flags {
  63        BATADV_UNI_FRAG_HEAD      = 1 << 0,
  64        BATADV_UNI_FRAG_LARGETAIL = 1 << 1,
  65};
  66
  67/* TT_QUERY subtypes */
  68#define BATADV_TT_QUERY_TYPE_MASK 0x3
  69
  70enum batadv_tt_query_packettype {
  71        BATADV_TT_REQUEST  = 0,
  72        BATADV_TT_RESPONSE = 1,
  73};
  74
  75/* TT_QUERY flags */
  76enum batadv_tt_query_flags {
  77        BATADV_TT_FULL_TABLE = 1 << 2,
  78};
  79
  80/* BATADV_TT_CLIENT flags.
  81 * Flags from 1 to 1 << 7 are sent on the wire, while flags from 1 << 8 to
  82 * 1 << 15 are used for local computation only
  83 */
  84enum batadv_tt_client_flags {
  85        BATADV_TT_CLIENT_DEL     = 1 << 0,
  86        BATADV_TT_CLIENT_ROAM    = 1 << 1,
  87        BATADV_TT_CLIENT_WIFI    = 1 << 2,
  88        BATADV_TT_CLIENT_NOPURGE = 1 << 8,
  89        BATADV_TT_CLIENT_NEW     = 1 << 9,
  90        BATADV_TT_CLIENT_PENDING = 1 << 10,
  91};
  92
  93/* claim frame types for the bridge loop avoidance */
  94enum batadv_bla_claimframe {
  95        BATADV_CLAIM_TYPE_ADD           = 0x00,
  96        BATADV_CLAIM_TYPE_DEL           = 0x01,
  97        BATADV_CLAIM_TYPE_ANNOUNCE      = 0x02,
  98        BATADV_CLAIM_TYPE_REQUEST       = 0x03,
  99};
 100
 101/* the destination hardware field in the ARP frame is used to
 102 * transport the claim type and the group id
 103 */
 104struct batadv_bla_claim_dst {
 105        uint8_t magic[3];       /* FF:43:05 */
 106        uint8_t type;           /* bla_claimframe */
 107        __be16 group;           /* group id */
 108} __packed;
 109
 110struct batadv_header {
 111        uint8_t  packet_type;
 112        uint8_t  version;  /* batman version field */
 113        uint8_t  ttl;
 114} __packed;
 115
 116struct batadv_ogm_packet {
 117        struct batadv_header header;
 118        uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
 119        __be32   seqno;
 120        uint8_t  orig[ETH_ALEN];
 121        uint8_t  prev_sender[ETH_ALEN];
 122        uint8_t  gw_flags;  /* flags related to gateway class */
 123        uint8_t  tq;
 124        uint8_t  tt_num_changes;
 125        uint8_t  ttvn; /* translation table version number */
 126        __be16   tt_crc;
 127} __packed;
 128
 129#define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
 130
 131struct batadv_icmp_packet {
 132        struct batadv_header header;
 133        uint8_t  msg_type; /* see ICMP message types above */
 134        uint8_t  dst[ETH_ALEN];
 135        uint8_t  orig[ETH_ALEN];
 136        __be16   seqno;
 137        uint8_t  uid;
 138        uint8_t  reserved;
 139} __packed;
 140
 141#define BATADV_RR_LEN 16
 142
 143/* icmp_packet_rr must start with all fields from imcp_packet
 144 * as this is assumed by code that handles ICMP packets
 145 */
 146struct batadv_icmp_packet_rr {
 147        struct batadv_header header;
 148        uint8_t  msg_type; /* see ICMP message types above */
 149        uint8_t  dst[ETH_ALEN];
 150        uint8_t  orig[ETH_ALEN];
 151        __be16   seqno;
 152        uint8_t  uid;
 153        uint8_t  rr_cur;
 154        uint8_t  rr[BATADV_RR_LEN][ETH_ALEN];
 155} __packed;
 156
 157struct batadv_unicast_packet {
 158        struct batadv_header header;
 159        uint8_t  ttvn; /* destination translation table version number */
 160        uint8_t  dest[ETH_ALEN];
 161} __packed;
 162
 163struct batadv_unicast_frag_packet {
 164        struct batadv_header header;
 165        uint8_t  ttvn; /* destination translation table version number */
 166        uint8_t  dest[ETH_ALEN];
 167        uint8_t  flags;
 168        uint8_t  align;
 169        uint8_t  orig[ETH_ALEN];
 170        __be16   seqno;
 171} __packed;
 172
 173struct batadv_bcast_packet {
 174        struct batadv_header header;
 175        uint8_t  reserved;
 176        __be32   seqno;
 177        uint8_t  orig[ETH_ALEN];
 178} __packed;
 179
 180struct batadv_vis_packet {
 181        struct batadv_header header;
 182        uint8_t  vis_type;       /* which type of vis-participant sent this? */
 183        __be32   seqno;          /* sequence number */
 184        uint8_t  entries;        /* number of entries behind this struct */
 185        uint8_t  reserved;
 186        uint8_t  vis_orig[ETH_ALEN];    /* originator reporting its neighbors */
 187        uint8_t  target_orig[ETH_ALEN]; /* who should receive this packet */
 188        uint8_t  sender_orig[ETH_ALEN]; /* who sent or forwarded this packet */
 189} __packed;
 190
 191struct batadv_tt_query_packet {
 192        struct batadv_header header;
 193        /* the flag field is a combination of:
 194         * - TT_REQUEST or TT_RESPONSE
 195         * - TT_FULL_TABLE
 196         */
 197        uint8_t  flags;
 198        uint8_t  dst[ETH_ALEN];
 199        uint8_t  src[ETH_ALEN];
 200        /* the ttvn field is:
 201         * if TT_REQUEST: ttvn that triggered the
 202         *                request
 203         * if TT_RESPONSE: new ttvn for the src
 204         *                 orig_node
 205         */
 206        uint8_t  ttvn;
 207        /* tt_data field is:
 208         * if TT_REQUEST: crc associated with the
 209         *                ttvn
 210         * if TT_RESPONSE: table_size
 211         */
 212        __be16 tt_data;
 213} __packed;
 214
 215struct batadv_roam_adv_packet {
 216        struct batadv_header header;
 217        uint8_t  reserved;
 218        uint8_t  dst[ETH_ALEN];
 219        uint8_t  src[ETH_ALEN];
 220        uint8_t  client[ETH_ALEN];
 221} __packed;
 222
 223struct batadv_tt_change {
 224        uint8_t flags;
 225        uint8_t addr[ETH_ALEN];
 226} __packed;
 227
 228#endif /* _NET_BATMAN_ADV_PACKET_H_ */
 229
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