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-rw-r--r--net/batman-adv/packet.h136
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diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
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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 12
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
54struct 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 uint8_t gw_flags; /* flags related to gateway class */
65 uint8_t align;
66} __attribute__((packed));
67
68#define BAT_PACKET_LEN sizeof(struct batman_packet)
69
70struct icmp_packet {
71 uint8_t packet_type;
72 uint8_t version; /* batman version field */
73 uint8_t msg_type; /* see ICMP message types above */
74 uint8_t ttl;
75 uint8_t dst[6];
76 uint8_t orig[6];
77 uint16_t seqno;
78 uint8_t uid;
79} __attribute__((packed));
80
81#define BAT_RR_LEN 16
82
83/* icmp_packet_rr must start with all fields from imcp_packet
84 * as this is assumed by code that handles ICMP packets */
85struct icmp_packet_rr {
86 uint8_t packet_type;
87 uint8_t version; /* batman version field */
88 uint8_t msg_type; /* see ICMP message types above */
89 uint8_t ttl;
90 uint8_t dst[6];
91 uint8_t orig[6];
92 uint16_t seqno;
93 uint8_t uid;
94 uint8_t rr_cur;
95 uint8_t rr[BAT_RR_LEN][ETH_ALEN];
96} __attribute__((packed));
97
98struct unicast_packet {
99 uint8_t packet_type;
100 uint8_t version; /* batman version field */
101 uint8_t dest[6];
102 uint8_t ttl;
103} __attribute__((packed));
104
105struct unicast_frag_packet {
106 uint8_t packet_type;
107 uint8_t version; /* batman version field */
108 uint8_t dest[6];
109 uint8_t ttl;
110 uint8_t flags;
111 uint8_t orig[6];
112 uint16_t seqno;
113} __attribute__((packed));
114
115struct bcast_packet {
116 uint8_t packet_type;
117 uint8_t version; /* batman version field */
118 uint8_t orig[6];
119 uint8_t ttl;
120 uint32_t seqno;
121} __attribute__((packed));
122
123struct vis_packet {
124 uint8_t packet_type;
125 uint8_t version; /* batman version field */
126 uint8_t vis_type; /* which type of vis-participant sent this? */
127 uint8_t entries; /* number of entries behind this struct */
128 uint32_t seqno; /* sequence number */
129 uint8_t ttl; /* TTL */
130 uint8_t vis_orig[6]; /* originator that informs about its
131 * neighbors */
132 uint8_t target_orig[6]; /* who should receive this packet */
133 uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
134} __attribute__((packed));
135
136#endif /* _NET_BATMAN_ADV_PACKET_H_ */