linux/net/batman-adv/packet.h
<<
>>
Prefs
   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   = BIT(3),
  41        BATADV_PRIMARIES_FIRST_HOP = BIT(4),
  42        BATADV_VIS_SERVER          = BIT(5),
  43        BATADV_DIRECTLINK          = BIT(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      = BIT(0),
  64        BATADV_UNI_FRAG_LARGETAIL = BIT(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 = BIT(2),
  78};
  79
  80/* BATADV_TT_CLIENT flags.
  81 * Flags from BIT(0) to BIT(7) are sent on the wire, while flags from BIT(8) to
  82 * BIT(15) are used for local computation only
  83 */
  84enum batadv_tt_client_flags {
  85        BATADV_TT_CLIENT_DEL     = BIT(0),
  86        BATADV_TT_CLIENT_ROAM    = BIT(1),
  87        BATADV_TT_CLIENT_WIFI    = BIT(2),
  88        BATADV_TT_CLIENT_TEMP    = BIT(3),
  89        BATADV_TT_CLIENT_NOPURGE = BIT(8),
  90        BATADV_TT_CLIENT_NEW     = BIT(9),
  91        BATADV_TT_CLIENT_PENDING = BIT(10),
  92};
  93
  94/* claim frame types for the bridge loop avoidance */
  95enum batadv_bla_claimframe {
  96        BATADV_CLAIM_TYPE_CLAIM         = 0x00,
  97        BATADV_CLAIM_TYPE_UNCLAIM       = 0x01,
  98        BATADV_CLAIM_TYPE_ANNOUNCE      = 0x02,
  99        BATADV_CLAIM_TYPE_REQUEST       = 0x03,
 100};
 101
 102/* the destination hardware field in the ARP frame is used to
 103 * transport the claim type and the group id
 104 */
 105struct batadv_bla_claim_dst {
 106        uint8_t magic[3];       /* FF:43:05 */
 107        uint8_t type;           /* bla_claimframe */
 108        __be16 group;           /* group id */
 109} __packed;
 110
 111struct batadv_header {
 112        uint8_t  packet_type;
 113        uint8_t  version;  /* batman version field */
 114        uint8_t  ttl;
 115} __packed;
 116
 117struct batadv_ogm_packet {
 118        struct batadv_header header;
 119        uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
 120        __be32   seqno;
 121        uint8_t  orig[ETH_ALEN];
 122        uint8_t  prev_sender[ETH_ALEN];
 123        uint8_t  gw_flags;  /* flags related to gateway class */
 124        uint8_t  tq;
 125        uint8_t  tt_num_changes;
 126        uint8_t  ttvn; /* translation table version number */
 127        __be16   tt_crc;
 128} __packed;
 129
 130#define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
 131
 132struct batadv_icmp_packet {
 133        struct batadv_header header;
 134        uint8_t  msg_type; /* see ICMP message types above */
 135        uint8_t  dst[ETH_ALEN];
 136        uint8_t  orig[ETH_ALEN];
 137        __be16   seqno;
 138        uint8_t  uid;
 139        uint8_t  reserved;
 140} __packed;
 141
 142#define BATADV_RR_LEN 16
 143
 144/* icmp_packet_rr must start with all fields from imcp_packet
 145 * as this is assumed by code that handles ICMP packets
 146 */
 147struct batadv_icmp_packet_rr {
 148        struct batadv_header header;
 149        uint8_t  msg_type; /* see ICMP message types above */
 150        uint8_t  dst[ETH_ALEN];
 151        uint8_t  orig[ETH_ALEN];
 152        __be16   seqno;
 153        uint8_t  uid;
 154        uint8_t  rr_cur;
 155        uint8_t  rr[BATADV_RR_LEN][ETH_ALEN];
 156} __packed;
 157
 158struct batadv_unicast_packet {
 159        struct batadv_header header;
 160        uint8_t  ttvn; /* destination translation table version number */
 161        uint8_t  dest[ETH_ALEN];
 162} __packed;
 163
 164struct batadv_unicast_frag_packet {
 165        struct batadv_header header;
 166        uint8_t  ttvn; /* destination translation table version number */
 167        uint8_t  dest[ETH_ALEN];
 168        uint8_t  flags;
 169        uint8_t  align;
 170        uint8_t  orig[ETH_ALEN];
 171        __be16   seqno;
 172} __packed;
 173
 174struct batadv_bcast_packet {
 175        struct batadv_header header;
 176        uint8_t  reserved;
 177        __be32   seqno;
 178        uint8_t  orig[ETH_ALEN];
 179} __packed;
 180
 181struct batadv_vis_packet {
 182        struct batadv_header header;
 183        uint8_t  vis_type;       /* which type of vis-participant sent this? */
 184        __be32   seqno;          /* sequence number */
 185        uint8_t  entries;        /* number of entries behind this struct */
 186        uint8_t  reserved;
 187        uint8_t  vis_orig[ETH_ALEN];    /* originator reporting its neighbors */
 188        uint8_t  target_orig[ETH_ALEN]; /* who should receive this packet */
 189        uint8_t  sender_orig[ETH_ALEN]; /* who sent or forwarded this packet */
 190} __packed;
 191
 192struct batadv_tt_query_packet {
 193        struct batadv_header header;
 194        /* the flag field is a combination of:
 195         * - TT_REQUEST or TT_RESPONSE
 196         * - TT_FULL_TABLE
 197         */
 198        uint8_t  flags;
 199        uint8_t  dst[ETH_ALEN];
 200        uint8_t  src[ETH_ALEN];
 201        /* the ttvn field is:
 202         * if TT_REQUEST: ttvn that triggered the
 203         *                request
 204         * if TT_RESPONSE: new ttvn for the src
 205         *                 orig_node
 206         */
 207        uint8_t  ttvn;
 208        /* tt_data field is:
 209         * if TT_REQUEST: crc associated with the
 210         *                ttvn
 211         * if TT_RESPONSE: table_size
 212         */
 213        __be16 tt_data;
 214} __packed;
 215
 216struct batadv_roam_adv_packet {
 217        struct batadv_header header;
 218        uint8_t  reserved;
 219        uint8_t  dst[ETH_ALEN];
 220        uint8_t  src[ETH_ALEN];
 221        uint8_t  client[ETH_ALEN];
 222} __packed;
 223
 224struct batadv_tt_change {
 225        uint8_t flags;
 226        uint8_t addr[ETH_ALEN];
 227} __packed;
 228
 229#endif /* _NET_BATMAN_ADV_PACKET_H_ */
 230
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.