aboutsummaryrefslogtreecommitdiffstats
path: root/net/batman-adv/packet.h
blob: eda99650e9f81ec7fbe7da8e7878747fe19ac709 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
/*
 * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */

#ifndef _NET_BATMAN_ADV_PACKET_H_
#define _NET_BATMAN_ADV_PACKET_H_

#define ETH_P_BATMAN  0x4305	/* unofficial/not registered Ethertype */

#define BAT_PACKET       0x01
#define BAT_ICMP         0x02
#define BAT_UNICAST      0x03
#define BAT_BCAST        0x04
#define BAT_VIS          0x05
#define BAT_UNICAST_FRAG 0x06

/* this file is included by batctl which needs these defines */
#define COMPAT_VERSION 12
#define DIRECTLINK 0x40
#define VIS_SERVER 0x20
#define PRIMARIES_FIRST_HOP 0x10

/* ICMP message types */
#define ECHO_REPLY 0
#define DESTINATION_UNREACHABLE 3
#define ECHO_REQUEST 8
#define TTL_EXCEEDED 11
#define PARAMETER_PROBLEM 12

/* vis defines */
#define VIS_TYPE_SERVER_SYNC		0
#define VIS_TYPE_CLIENT_UPDATE		1

/* fragmentation defines */
#define UNI_FRAG_HEAD 0x01
#define UNI_FRAG_LARGETAIL 0x02

struct batman_packet {
	uint8_t  packet_type;
	uint8_t  version;  /* batman version field */
	uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
	uint8_t  tq;
	uint32_t seqno;
	uint8_t  orig[6];
	uint8_t  prev_sender[6];
	uint8_t  ttl;
	uint8_t  num_tt;
	uint8_t  gw_flags;  /* flags related to gateway class */
	uint8_t  align;
} __packed;

#define BAT_PACKET_LEN sizeof(struct batman_packet)

struct icmp_packet {
	uint8_t  packet_type;
	uint8_t  version;  /* batman version field */
	uint8_t  msg_type; /* see ICMP message types above */
	uint8_t  ttl;
	uint8_t  dst[6];
	uint8_t  orig[6];
	uint16_t seqno;
	uint8_t  uid;
} __packed;

#define BAT_RR_LEN 16

/* icmp_packet_rr must start with all fields from imcp_packet
 * as this is assumed by code that handles ICMP packets */
struct icmp_packet_rr {
	uint8_t  packet_type;
	uint8_t  version;  /* batman version field */
	uint8_t  msg_type; /* see ICMP message types above */
	uint8_t  ttl;
	uint8_t  dst[6];
	uint8_t  orig[6];
	uint16_t seqno;
	uint8_t  uid;
	uint8_t  rr_cur;
	uint8_t  rr[BAT_RR_LEN][ETH_ALEN];
} __packed;

struct unicast_packet {
	uint8_t  packet_type;
	uint8_t  version;  /* batman version field */
	uint8_t  dest[6];
	uint8_t  ttl;
} __packed;

struct unicast_frag_packet {
	uint8_t  packet_type;
	uint8_t  version;  /* batman version field */
	uint8_t  dest[6];
	uint8_t  ttl;
	uint8_t  flags;
	uint8_t  orig[6];
	uint16_t seqno;
} __packed;

struct bcast_packet {
	uint8_t  packet_type;
	uint8_t  version;  /* batman version field */
	uint8_t  orig[6];
	uint8_t  ttl;
	uint32_t seqno;
} __packed;

struct vis_packet {
	uint8_t  packet_type;
	uint8_t  version;        /* batman version field */
	uint8_t  vis_type;	 /* which type of vis-participant sent this? */
	uint8_t  entries;	 /* number of entries behind this struct */
	uint32_t seqno;		 /* sequence number */
	uint8_t  ttl;		 /* TTL */
	uint8_t  vis_orig[6];	 /* originator that announces its neighbors */
	uint8_t  target_orig[6]; /* who should receive this packet */
	uint8_t  sender_orig[6]; /* who sent or rebroadcasted this packet */
} __packed;

#endif /* _NET_BATMAN_ADV_PACKET_H_ */