1 /* Copyright (C) 2007-2012 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 #define BATADV_ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */
25 enum batadv_packettype {
28 BATADV_UNICAST = 0x03,
31 BATADV_UNICAST_FRAG = 0x06,
32 BATADV_TT_QUERY = 0x07,
33 BATADV_ROAM_ADV = 0x08,
34 BATADV_UNICAST_4ADDR = 0x09,
38 * enum batadv_subtype - packet subtype for unicast4addr
39 * @BATADV_P_DATA: user payload
40 * @BATADV_P_DAT_DHT_GET: DHT request message
41 * @BATADV_P_DAT_DHT_PUT: DHT store message
42 * @BATADV_P_DAT_CACHE_REPLY: ARP reply generated by DAT
46 BATADV_P_DAT_DHT_GET = 0x02,
47 BATADV_P_DAT_DHT_PUT = 0x03,
48 BATADV_P_DAT_CACHE_REPLY = 0x04,
51 /* this file is included by batctl which needs these defines */
52 #define BATADV_COMPAT_VERSION 14
54 enum batadv_iv_flags {
55 BATADV_NOT_BEST_NEXT_HOP = BIT(3),
56 BATADV_PRIMARIES_FIRST_HOP = BIT(4),
57 BATADV_VIS_SERVER = BIT(5),
58 BATADV_DIRECTLINK = BIT(6),
61 /* ICMP message types */
62 enum batadv_icmp_packettype {
63 BATADV_ECHO_REPLY = 0,
64 BATADV_DESTINATION_UNREACHABLE = 3,
65 BATADV_ECHO_REQUEST = 8,
66 BATADV_TTL_EXCEEDED = 11,
67 BATADV_PARAMETER_PROBLEM = 12,
71 enum batadv_vis_packettype {
72 BATADV_VIS_TYPE_SERVER_SYNC = 0,
73 BATADV_VIS_TYPE_CLIENT_UPDATE = 1,
76 /* fragmentation defines */
77 enum batadv_unicast_frag_flags {
78 BATADV_UNI_FRAG_HEAD = BIT(0),
79 BATADV_UNI_FRAG_LARGETAIL = BIT(1),
82 /* TT_QUERY subtypes */
83 #define BATADV_TT_QUERY_TYPE_MASK 0x3
85 enum batadv_tt_query_packettype {
86 BATADV_TT_REQUEST = 0,
87 BATADV_TT_RESPONSE = 1,
91 enum batadv_tt_query_flags {
92 BATADV_TT_FULL_TABLE = BIT(2),
95 /* BATADV_TT_CLIENT flags.
96 * Flags from BIT(0) to BIT(7) are sent on the wire, while flags from BIT(8) to
97 * BIT(15) are used for local computation only
99 enum batadv_tt_client_flags {
100 BATADV_TT_CLIENT_DEL = BIT(0),
101 BATADV_TT_CLIENT_ROAM = BIT(1),
102 BATADV_TT_CLIENT_WIFI = BIT(2),
103 BATADV_TT_CLIENT_TEMP = BIT(3),
104 BATADV_TT_CLIENT_NOPURGE = BIT(8),
105 BATADV_TT_CLIENT_NEW = BIT(9),
106 BATADV_TT_CLIENT_PENDING = BIT(10),
109 /* claim frame types for the bridge loop avoidance */
110 enum batadv_bla_claimframe {
111 BATADV_CLAIM_TYPE_CLAIM = 0x00,
112 BATADV_CLAIM_TYPE_UNCLAIM = 0x01,
113 BATADV_CLAIM_TYPE_ANNOUNCE = 0x02,
114 BATADV_CLAIM_TYPE_REQUEST = 0x03,
117 /* the destination hardware field in the ARP frame is used to
118 * transport the claim type and the group id
120 struct batadv_bla_claim_dst {
121 uint8_t magic[3]; /* FF:43:05 */
122 uint8_t type; /* bla_claimframe */
123 __be16 group; /* group id */
126 struct batadv_header {
128 uint8_t version; /* batman version field */
130 /* the parent struct has to add a byte after the header to make
131 * everything 4 bytes aligned again
135 struct batadv_ogm_packet {
136 struct batadv_header header;
137 uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
139 uint8_t orig[ETH_ALEN];
140 uint8_t prev_sender[ETH_ALEN];
141 uint8_t gw_flags; /* flags related to gateway class */
143 uint8_t tt_num_changes;
144 uint8_t ttvn; /* translation table version number */
148 #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
150 struct batadv_icmp_packet {
151 struct batadv_header header;
152 uint8_t msg_type; /* see ICMP message types above */
153 uint8_t dst[ETH_ALEN];
154 uint8_t orig[ETH_ALEN];
160 #define BATADV_RR_LEN 16
162 /* icmp_packet_rr must start with all fields from imcp_packet
163 * as this is assumed by code that handles ICMP packets
165 struct batadv_icmp_packet_rr {
166 struct batadv_header header;
167 uint8_t msg_type; /* see ICMP message types above */
168 uint8_t dst[ETH_ALEN];
169 uint8_t orig[ETH_ALEN];
173 uint8_t rr[BATADV_RR_LEN][ETH_ALEN];
176 /* All packet headers in front of an ethernet header have to be completely
177 * divisible by 2 but not by 4 to make the payload after the ethernet
178 * header again 4 bytes boundary aligned.
180 * A packing of 2 is necessary to avoid extra padding at the end of the struct
181 * caused by a structure member which is larger than two bytes. Otherwise
182 * the structure would not fulfill the previously mentioned rule to avoid the
183 * misalignment of the payload after the ethernet header. It may also lead to
184 * leakage of information when the padding it not initialized before sending.
188 struct batadv_unicast_packet {
189 struct batadv_header header;
190 uint8_t ttvn; /* destination translation table version number */
191 uint8_t dest[ETH_ALEN];
192 /* "4 bytes boundary + 2 bytes" long to make the payload after the
193 * following ethernet header again 4 bytes boundary aligned
198 * struct batadv_unicast_4addr_packet - extended unicast packet
199 * @u: common unicast packet header
200 * @src: address of the source
201 * @subtype: packet subtype
203 struct batadv_unicast_4addr_packet {
204 struct batadv_unicast_packet u;
205 uint8_t src[ETH_ALEN];
208 /* "4 bytes boundary + 2 bytes" long to make the payload after the
209 * following ethernet header again 4 bytes boundary aligned
213 struct batadv_unicast_frag_packet {
214 struct batadv_header header;
215 uint8_t ttvn; /* destination translation table version number */
216 uint8_t dest[ETH_ALEN];
219 uint8_t orig[ETH_ALEN];
223 struct batadv_bcast_packet {
224 struct batadv_header header;
227 uint8_t orig[ETH_ALEN];
228 /* "4 bytes boundary + 2 bytes" long to make the payload after the
229 * following ethernet header again 4 bytes boundary aligned
235 struct batadv_vis_packet {
236 struct batadv_header header;
237 uint8_t vis_type; /* which type of vis-participant sent this? */
238 __be32 seqno; /* sequence number */
239 uint8_t entries; /* number of entries behind this struct */
241 uint8_t vis_orig[ETH_ALEN]; /* originator reporting its neighbors */
242 uint8_t target_orig[ETH_ALEN]; /* who should receive this packet */
243 uint8_t sender_orig[ETH_ALEN]; /* who sent or forwarded this packet */
246 struct batadv_tt_query_packet {
247 struct batadv_header header;
248 /* the flag field is a combination of:
249 * - TT_REQUEST or TT_RESPONSE
253 uint8_t dst[ETH_ALEN];
254 uint8_t src[ETH_ALEN];
255 /* the ttvn field is:
256 * if TT_REQUEST: ttvn that triggered the
258 * if TT_RESPONSE: new ttvn for the src
263 * if TT_REQUEST: crc associated with the
265 * if TT_RESPONSE: table_size
270 struct batadv_roam_adv_packet {
271 struct batadv_header header;
273 uint8_t dst[ETH_ALEN];
274 uint8_t src[ETH_ALEN];
275 uint8_t client[ETH_ALEN];
278 struct batadv_tt_change {
280 uint8_t addr[ETH_ALEN];
283 #endif /* _NET_BATMAN_ADV_PACKET_H_ */