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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 = 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_ */