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 #ifndef _NET_BATMAN_ADV_PACKET_H_
  23 #define _NET_BATMAN_ADV_PACKET_H_
  24
  25 #define ETH_P_BATMAN  0x4305    /* unofficial/not registered Ethertype */
  26
  27 #define BAT_PACKET       0x01
  28 #define BAT_ICMP         0x02
  29 #define BAT_UNICAST      0x03
  30 #define BAT_BCAST        0x04
  31 #define BAT_VIS          0x05
  32 #define BAT_UNICAST_FRAG 0x06
  33
  34 /* this file is included by batctl which needs these defines */
  35 #define COMPAT_VERSION 13
  36 #define DIRECTLINK 0x40
  37 #define VIS_SERVER 0x20
  38 #define PRIMARIES_FIRST_HOP 0x10
  39
  40 /* ICMP message types */
  41 #define ECHO_REPLY 0
  42 #define DESTINATION_UNREACHABLE 3
  43 #define ECHO_REQUEST 8
  44 #define TTL_EXCEEDED 11
  45 #define PARAMETER_PROBLEM 12
  46
  47 /* vis defines */
  48 #define VIS_TYPE_SERVER_SYNC            0
  49 #define VIS_TYPE_CLIENT_UPDATE          1
  50
  51 /* fragmentation defines */
  52 #define UNI_FRAG_HEAD 0x01
  53
  54 struct batman_packet {
  55         uint8_t  packet_type;
  56         uint8_t  version;  /* batman version field */
  57         uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
  58         uint8_t  tq;
  59         uint32_t seqno;
  60         uint8_t  orig[6];
  61         uint8_t  prev_sender[6];
  62         uint8_t  ttl;
  63         uint8_t  num_hna;
  64 } __attribute__((packed));
  65
  66 #define BAT_PACKET_LEN sizeof(struct batman_packet)
  67
  68 struct icmp_packet {
  69         uint8_t  packet_type;
  70         uint8_t  version;  /* batman version field */
  71         uint8_t  msg_type; /* see ICMP message types above */
  72         uint8_t  ttl;
  73         uint8_t  dst[6];
  74         uint8_t  orig[6];
  75         uint16_t seqno;
  76         uint8_t  uid;
  77 } __attribute__((packed));
  78
  79 #define BAT_RR_LEN 16
  80
  81 /* icmp_packet_rr must start with all fields from imcp_packet
  82  * as this is assumed by code that handles ICMP packets */
  83 struct icmp_packet_rr {
  84         uint8_t  packet_type;
  85         uint8_t  version;  /* batman version field */
  86         uint8_t  msg_type; /* see ICMP message types above */
  87         uint8_t  ttl;
  88         uint8_t  dst[6];
  89         uint8_t  orig[6];
  90         uint16_t seqno;
  91         uint8_t  uid;
  92         uint8_t  rr_cur;
  93         uint8_t  rr[BAT_RR_LEN][ETH_ALEN];
  94 } __attribute__((packed));
  95
  96 struct unicast_packet {
  97         uint8_t  packet_type;
  98         uint8_t  version;  /* batman version field */
  99         uint8_t  dest[6];
 100         uint8_t  ttl;
 101 } __attribute__((packed));
 102
 103 struct unicast_frag_packet {
 104         uint8_t  packet_type;
 105         uint8_t  version;  /* batman version field */
 106         uint8_t  dest[6];
 107         uint8_t  ttl;
 108         uint8_t  flags;
 109         uint8_t  orig[6];
 110         uint16_t seqno;
 111 } __attribute__((packed));
 112
 113 struct bcast_packet {
 114         uint8_t  packet_type;
 115         uint8_t  version;  /* batman version field */
 116         uint8_t  orig[6];
 117         uint8_t  ttl;
 118         uint32_t seqno;
 119 } __attribute__((packed));
 120
 121 struct vis_packet {
 122         uint8_t  packet_type;
 123         uint8_t  version;        /* batman version field */
 124         uint8_t  vis_type;       /* which type of vis-participant sent this? */
 125         uint8_t  entries;        /* number of entries behind this struct */
 126         uint32_t seqno;          /* sequence number */
 127         uint8_t  ttl;            /* TTL */
 128         uint8_t  vis_orig[6];    /* originator that informs about its
 129                                   * neighbors */
 130         uint8_t  target_orig[6]; /* who should receive this packet */
 131         uint8_t  sender_orig[6]; /* who sent or rebroadcasted this packet */
 132 } __attribute__((packed));
 133
 134 #endif /* _NET_BATMAN_ADV_PACKET_H_ */