1 /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
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.
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.
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
20 #ifndef _NET_BATMAN_ADV_PACKET_H_
21 #define _NET_BATMAN_ADV_PACKET_H_
23 enum batadv_packettype {
26 BATADV_UNICAST = 0x03,
29 BATADV_UNICAST_FRAG = 0x06,
30 BATADV_TT_QUERY = 0x07,
31 BATADV_ROAM_ADV = 0x08,
32 BATADV_UNICAST_4ADDR = 0x09,
37 * enum batadv_subtype - packet subtype for unicast4addr
38 * @BATADV_P_DATA: user payload
39 * @BATADV_P_DAT_DHT_GET: DHT request message
40 * @BATADV_P_DAT_DHT_PUT: DHT store message
41 * @BATADV_P_DAT_CACHE_REPLY: ARP reply generated by DAT
45 BATADV_P_DAT_DHT_GET = 0x02,
46 BATADV_P_DAT_DHT_PUT = 0x03,
47 BATADV_P_DAT_CACHE_REPLY = 0x04,
50 /* this file is included by batctl which needs these defines */
51 #define BATADV_COMPAT_VERSION 14
53 enum batadv_iv_flags {
54 BATADV_NOT_BEST_NEXT_HOP = BIT(3),
55 BATADV_PRIMARIES_FIRST_HOP = BIT(4),
56 BATADV_VIS_SERVER = BIT(5),
57 BATADV_DIRECTLINK = BIT(6),
60 /* ICMP message types */
61 enum batadv_icmp_packettype {
62 BATADV_ECHO_REPLY = 0,
63 BATADV_DESTINATION_UNREACHABLE = 3,
64 BATADV_ECHO_REQUEST = 8,
65 BATADV_TTL_EXCEEDED = 11,
66 BATADV_PARAMETER_PROBLEM = 12,
70 enum batadv_vis_packettype {
71 BATADV_VIS_TYPE_SERVER_SYNC = 0,
72 BATADV_VIS_TYPE_CLIENT_UPDATE = 1,
75 /* fragmentation defines */
76 enum batadv_unicast_frag_flags {
77 BATADV_UNI_FRAG_HEAD = BIT(0),
78 BATADV_UNI_FRAG_LARGETAIL = BIT(1),
81 /* TT_QUERY subtypes */
82 #define BATADV_TT_QUERY_TYPE_MASK 0x3
84 enum batadv_tt_query_packettype {
85 BATADV_TT_REQUEST = 0,
86 BATADV_TT_RESPONSE = 1,
90 enum batadv_tt_query_flags {
91 BATADV_TT_FULL_TABLE = BIT(2),
94 /* BATADV_TT_CLIENT flags.
95 * Flags from BIT(0) to BIT(7) are sent on the wire, while flags from BIT(8) to
96 * BIT(15) are used for local computation only
98 enum batadv_tt_client_flags {
99 BATADV_TT_CLIENT_DEL = BIT(0),
100 BATADV_TT_CLIENT_ROAM = BIT(1),
101 BATADV_TT_CLIENT_WIFI = BIT(2),
102 BATADV_TT_CLIENT_TEMP = BIT(3),
103 BATADV_TT_CLIENT_NOPURGE = BIT(8),
104 BATADV_TT_CLIENT_NEW = BIT(9),
105 BATADV_TT_CLIENT_PENDING = BIT(10),
108 /* claim frame types for the bridge loop avoidance */
109 enum batadv_bla_claimframe {
110 BATADV_CLAIM_TYPE_CLAIM = 0x00,
111 BATADV_CLAIM_TYPE_UNCLAIM = 0x01,
112 BATADV_CLAIM_TYPE_ANNOUNCE = 0x02,
113 BATADV_CLAIM_TYPE_REQUEST = 0x03,
116 /* the destination hardware field in the ARP frame is used to
117 * transport the claim type and the group id
119 struct batadv_bla_claim_dst {
120 uint8_t magic[3]; /* FF:43:05 */
121 uint8_t type; /* bla_claimframe */
122 __be16 group; /* group id */
125 struct batadv_header {
127 uint8_t version; /* batman version field */
129 /* the parent struct has to add a byte after the header to make
130 * everything 4 bytes aligned again
134 struct batadv_ogm_packet {
135 struct batadv_header header;
136 uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
138 uint8_t orig[ETH_ALEN];
139 uint8_t prev_sender[ETH_ALEN];
140 uint8_t gw_flags; /* flags related to gateway class */
142 uint8_t tt_num_changes;
143 uint8_t ttvn; /* translation table version number */
147 #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
149 struct batadv_icmp_packet {
150 struct batadv_header header;
151 uint8_t msg_type; /* see ICMP message types above */
152 uint8_t dst[ETH_ALEN];
153 uint8_t orig[ETH_ALEN];
159 #define BATADV_RR_LEN 16
161 /* icmp_packet_rr must start with all fields from imcp_packet
162 * as this is assumed by code that handles ICMP packets
164 struct batadv_icmp_packet_rr {
165 struct batadv_header header;
166 uint8_t msg_type; /* see ICMP message types above */
167 uint8_t dst[ETH_ALEN];
168 uint8_t orig[ETH_ALEN];
172 uint8_t rr[BATADV_RR_LEN][ETH_ALEN];
175 /* All packet headers in front of an ethernet header have to be completely
176 * divisible by 2 but not by 4 to make the payload after the ethernet
177 * header again 4 bytes boundary aligned.
179 * A packing of 2 is necessary to avoid extra padding at the end of the struct
180 * caused by a structure member which is larger than two bytes. Otherwise
181 * the structure would not fulfill the previously mentioned rule to avoid the
182 * misalignment of the payload after the ethernet header. It may also lead to
183 * leakage of information when the padding it not initialized before sending.
187 struct batadv_unicast_packet {
188 struct batadv_header header;
189 uint8_t ttvn; /* destination translation table version number */
190 uint8_t dest[ETH_ALEN];
191 /* "4 bytes boundary + 2 bytes" long to make the payload after the
192 * following ethernet header again 4 bytes boundary aligned
197 * struct batadv_unicast_4addr_packet - extended unicast packet
198 * @u: common unicast packet header
199 * @src: address of the source
200 * @subtype: packet subtype
202 struct batadv_unicast_4addr_packet {
203 struct batadv_unicast_packet u;
204 uint8_t src[ETH_ALEN];
207 /* "4 bytes boundary + 2 bytes" long to make the payload after the
208 * following ethernet header again 4 bytes boundary aligned
212 struct batadv_unicast_frag_packet {
213 struct batadv_header header;
214 uint8_t ttvn; /* destination translation table version number */
215 uint8_t dest[ETH_ALEN];
218 uint8_t orig[ETH_ALEN];
222 struct batadv_bcast_packet {
223 struct batadv_header header;
226 uint8_t orig[ETH_ALEN];
227 /* "4 bytes boundary + 2 bytes" long to make the payload after the
228 * following ethernet header again 4 bytes boundary aligned
234 struct batadv_vis_packet {
235 struct batadv_header header;
236 uint8_t vis_type; /* which type of vis-participant sent this? */
237 __be32 seqno; /* sequence number */
238 uint8_t entries; /* number of entries behind this struct */
240 uint8_t vis_orig[ETH_ALEN]; /* originator reporting its neighbors */
241 uint8_t target_orig[ETH_ALEN]; /* who should receive this packet */
242 uint8_t sender_orig[ETH_ALEN]; /* who sent or forwarded this packet */
245 struct batadv_tt_query_packet {
246 struct batadv_header header;
247 /* the flag field is a combination of:
248 * - TT_REQUEST or TT_RESPONSE
252 uint8_t dst[ETH_ALEN];
253 uint8_t src[ETH_ALEN];
254 /* the ttvn field is:
255 * if TT_REQUEST: ttvn that triggered the
257 * if TT_RESPONSE: new ttvn for the src
262 * if TT_REQUEST: crc associated with the
264 * if TT_RESPONSE: table_size
269 struct batadv_roam_adv_packet {
270 struct batadv_header header;
272 uint8_t dst[ETH_ALEN];
273 uint8_t src[ETH_ALEN];
274 uint8_t client[ETH_ALEN];
277 struct batadv_tt_change {
279 uint8_t addr[ETH_ALEN];
283 * struct batadv_coded_packet - network coded packet
284 * @header: common batman packet header and ttl of first included packet
285 * @reserved: Align following fields to 2-byte boundaries
286 * @first_source: original source of first included packet
287 * @first_orig_dest: original destinal of first included packet
288 * @first_crc: checksum of first included packet
289 * @first_ttvn: tt-version number of first included packet
290 * @second_ttl: ttl of second packet
291 * @second_dest: second receiver of this coded packet
292 * @second_source: original source of second included packet
293 * @second_orig_dest: original destination of second included packet
294 * @second_crc: checksum of second included packet
295 * @second_ttvn: tt version number of second included packet
296 * @coded_len: length of network coded part of the payload
298 struct batadv_coded_packet {
299 struct batadv_header header;
301 /* uint8_t first_dest[ETH_ALEN]; - saved in mac header destination */
302 uint8_t first_source[ETH_ALEN];
303 uint8_t first_orig_dest[ETH_ALEN];
307 uint8_t second_dest[ETH_ALEN];
308 uint8_t second_source[ETH_ALEN];
309 uint8_t second_orig_dest[ETH_ALEN];
314 #endif /* _NET_BATMAN_ADV_PACKET_H_ */