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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
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 | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #ifndef _NET_BATMAN_ADV_PACKET_H_ | |
21 | #define _NET_BATMAN_ADV_PACKET_H_ | |
22 | ||
acd34afa | 23 | enum batadv_packettype { |
7cdcf6dd AQ |
24 | BATADV_IV_OGM = 0x01, |
25 | BATADV_ICMP = 0x02, | |
26 | BATADV_UNICAST = 0x03, | |
27 | BATADV_BCAST = 0x04, | |
28 | BATADV_VIS = 0x05, | |
29 | BATADV_UNICAST_FRAG = 0x06, | |
30 | BATADV_TT_QUERY = 0x07, | |
31 | BATADV_ROAM_ADV = 0x08, | |
32 | BATADV_UNICAST_4ADDR = 0x09, | |
3c12de9a | 33 | BATADV_CODED = 0x0a, |
7cdcf6dd AQ |
34 | }; |
35 | ||
36 | /** | |
37 | * enum batadv_subtype - packet subtype for unicast4addr | |
38 | * @BATADV_P_DATA: user payload | |
5c3a0e55 AQ |
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 | |
7cdcf6dd AQ |
42 | */ |
43 | enum batadv_subtype { | |
5c3a0e55 AQ |
44 | BATADV_P_DATA = 0x01, |
45 | BATADV_P_DAT_DHT_GET = 0x02, | |
46 | BATADV_P_DAT_DHT_PUT = 0x03, | |
47 | BATADV_P_DAT_CACHE_REPLY = 0x04, | |
e8958dbf | 48 | }; |
c6c8fea2 SE |
49 | |
50 | /* this file is included by batctl which needs these defines */ | |
7e071c79 | 51 | #define BATADV_COMPAT_VERSION 14 |
e8958dbf | 52 | |
acd34afa | 53 | enum batadv_iv_flags { |
8de47de5 SE |
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), | |
e8958dbf | 58 | }; |
c6c8fea2 SE |
59 | |
60 | /* ICMP message types */ | |
acd34afa SE |
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, | |
e8958dbf | 67 | }; |
c6c8fea2 SE |
68 | |
69 | /* vis defines */ | |
acd34afa SE |
70 | enum batadv_vis_packettype { |
71 | BATADV_VIS_TYPE_SERVER_SYNC = 0, | |
72 | BATADV_VIS_TYPE_CLIENT_UPDATE = 1, | |
e8958dbf | 73 | }; |
c6c8fea2 SE |
74 | |
75 | /* fragmentation defines */ | |
acd34afa | 76 | enum batadv_unicast_frag_flags { |
8de47de5 SE |
77 | BATADV_UNI_FRAG_HEAD = BIT(0), |
78 | BATADV_UNI_FRAG_LARGETAIL = BIT(1), | |
e8958dbf | 79 | }; |
c6c8fea2 | 80 | |
a73105b8 | 81 | /* TT_QUERY subtypes */ |
7e071c79 | 82 | #define BATADV_TT_QUERY_TYPE_MASK 0x3 |
a73105b8 | 83 | |
acd34afa SE |
84 | enum batadv_tt_query_packettype { |
85 | BATADV_TT_REQUEST = 0, | |
86 | BATADV_TT_RESPONSE = 1, | |
a73105b8 AQ |
87 | }; |
88 | ||
89 | /* TT_QUERY flags */ | |
acd34afa | 90 | enum batadv_tt_query_flags { |
8de47de5 | 91 | BATADV_TT_FULL_TABLE = BIT(2), |
a73105b8 AQ |
92 | }; |
93 | ||
acd34afa | 94 | /* BATADV_TT_CLIENT flags. |
8de47de5 SE |
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 | |
9cfc7bd6 | 97 | */ |
acd34afa | 98 | enum batadv_tt_client_flags { |
8de47de5 SE |
99 | BATADV_TT_CLIENT_DEL = BIT(0), |
100 | BATADV_TT_CLIENT_ROAM = BIT(1), | |
101 | BATADV_TT_CLIENT_WIFI = BIT(2), | |
30cfd02b | 102 | BATADV_TT_CLIENT_TEMP = BIT(3), |
8de47de5 SE |
103 | BATADV_TT_CLIENT_NOPURGE = BIT(8), |
104 | BATADV_TT_CLIENT_NEW = BIT(9), | |
105 | BATADV_TT_CLIENT_PENDING = BIT(10), | |
a73105b8 AQ |
106 | }; |
107 | ||
23721387 | 108 | /* claim frame types for the bridge loop avoidance */ |
acd34afa | 109 | enum batadv_bla_claimframe { |
3eb8773e SW |
110 | BATADV_CLAIM_TYPE_CLAIM = 0x00, |
111 | BATADV_CLAIM_TYPE_UNCLAIM = 0x01, | |
acd34afa SE |
112 | BATADV_CLAIM_TYPE_ANNOUNCE = 0x02, |
113 | BATADV_CLAIM_TYPE_REQUEST = 0x03, | |
23721387 SW |
114 | }; |
115 | ||
116 | /* the destination hardware field in the ARP frame is used to | |
117 | * transport the claim type and the group id | |
118 | */ | |
96412690 | 119 | struct batadv_bla_claim_dst { |
23721387 SW |
120 | uint8_t magic[3]; /* FF:43:05 */ |
121 | uint8_t type; /* bla_claimframe */ | |
3e2f1a1b | 122 | __be16 group; /* group id */ |
f6c57a46 | 123 | }; |
23721387 | 124 | |
96412690 | 125 | struct batadv_header { |
c6c8fea2 SE |
126 | uint8_t packet_type; |
127 | uint8_t version; /* batman version field */ | |
3b27ffb0 | 128 | uint8_t ttl; |
f6c57a46 SE |
129 | /* the parent struct has to add a byte after the header to make |
130 | * everything 4 bytes aligned again | |
131 | */ | |
132 | }; | |
76543d14 | 133 | |
96412690 SE |
134 | struct batadv_ogm_packet { |
135 | struct batadv_header header; | |
c6c8fea2 | 136 | uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */ |
e0f5211f | 137 | __be32 seqno; |
c1faead3 AQ |
138 | uint8_t orig[ETH_ALEN]; |
139 | uint8_t prev_sender[ETH_ALEN]; | |
c6c8fea2 | 140 | uint8_t gw_flags; /* flags related to gateway class */ |
3b27ffb0 | 141 | uint8_t tq; |
a73105b8 AQ |
142 | uint8_t tt_num_changes; |
143 | uint8_t ttvn; /* translation table version number */ | |
16a70345 | 144 | __be16 tt_crc; |
aa0adb1a | 145 | } __packed; |
c6c8fea2 | 146 | |
96412690 | 147 | #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet) |
c6c8fea2 | 148 | |
96412690 SE |
149 | struct batadv_icmp_packet { |
150 | struct batadv_header header; | |
3b27ffb0 | 151 | uint8_t msg_type; /* see ICMP message types above */ |
c1faead3 AQ |
152 | uint8_t dst[ETH_ALEN]; |
153 | uint8_t orig[ETH_ALEN]; | |
3e2f1a1b | 154 | __be16 seqno; |
c6c8fea2 | 155 | uint8_t uid; |
3b27ffb0 | 156 | uint8_t reserved; |
f6c57a46 | 157 | }; |
c6c8fea2 | 158 | |
7e071c79 | 159 | #define BATADV_RR_LEN 16 |
c6c8fea2 SE |
160 | |
161 | /* icmp_packet_rr must start with all fields from imcp_packet | |
9cfc7bd6 SE |
162 | * as this is assumed by code that handles ICMP packets |
163 | */ | |
96412690 SE |
164 | struct batadv_icmp_packet_rr { |
165 | struct batadv_header header; | |
3b27ffb0 | 166 | uint8_t msg_type; /* see ICMP message types above */ |
c1faead3 AQ |
167 | uint8_t dst[ETH_ALEN]; |
168 | uint8_t orig[ETH_ALEN]; | |
3e2f1a1b | 169 | __be16 seqno; |
c6c8fea2 SE |
170 | uint8_t uid; |
171 | uint8_t rr_cur; | |
7e071c79 | 172 | uint8_t rr[BATADV_RR_LEN][ETH_ALEN]; |
f6c57a46 | 173 | }; |
c6c8fea2 | 174 | |
e022b956 SE |
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. | |
178 | * | |
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. | |
184 | */ | |
185 | #pragma pack(2) | |
186 | ||
96412690 SE |
187 | struct batadv_unicast_packet { |
188 | struct batadv_header header; | |
a73105b8 | 189 | uint8_t ttvn; /* destination translation table version number */ |
c1faead3 | 190 | uint8_t dest[ETH_ALEN]; |
f6c57a46 SE |
191 | /* "4 bytes boundary + 2 bytes" long to make the payload after the |
192 | * following ethernet header again 4 bytes boundary aligned | |
193 | */ | |
194 | }; | |
c6c8fea2 | 195 | |
7cdcf6dd AQ |
196 | /** |
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 | |
201 | */ | |
202 | struct batadv_unicast_4addr_packet { | |
203 | struct batadv_unicast_packet u; | |
204 | uint8_t src[ETH_ALEN]; | |
205 | uint8_t subtype; | |
206 | uint8_t reserved; | |
207 | /* "4 bytes boundary + 2 bytes" long to make the payload after the | |
208 | * following ethernet header again 4 bytes boundary aligned | |
209 | */ | |
210 | }; | |
211 | ||
96412690 SE |
212 | struct batadv_unicast_frag_packet { |
213 | struct batadv_header header; | |
a73105b8 | 214 | uint8_t ttvn; /* destination translation table version number */ |
c1faead3 | 215 | uint8_t dest[ETH_ALEN]; |
c6c8fea2 | 216 | uint8_t flags; |
3b27ffb0 | 217 | uint8_t align; |
c1faead3 | 218 | uint8_t orig[ETH_ALEN]; |
3e2f1a1b | 219 | __be16 seqno; |
aa0adb1a | 220 | } __packed; |
c6c8fea2 | 221 | |
96412690 SE |
222 | struct batadv_bcast_packet { |
223 | struct batadv_header header; | |
3b27ffb0 | 224 | uint8_t reserved; |
3e2f1a1b | 225 | __be32 seqno; |
c1faead3 | 226 | uint8_t orig[ETH_ALEN]; |
f6c57a46 SE |
227 | /* "4 bytes boundary + 2 bytes" long to make the payload after the |
228 | * following ethernet header again 4 bytes boundary aligned | |
229 | */ | |
e022b956 SE |
230 | }; |
231 | ||
232 | #pragma pack() | |
c6c8fea2 | 233 | |
96412690 SE |
234 | struct batadv_vis_packet { |
235 | struct batadv_header header; | |
c6c8fea2 | 236 | uint8_t vis_type; /* which type of vis-participant sent this? */ |
3e2f1a1b | 237 | __be32 seqno; /* sequence number */ |
3b27ffb0 AQ |
238 | uint8_t entries; /* number of entries behind this struct */ |
239 | uint8_t reserved; | |
c1faead3 AQ |
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 */ | |
f6c57a46 | 243 | }; |
c6c8fea2 | 244 | |
96412690 SE |
245 | struct batadv_tt_query_packet { |
246 | struct batadv_header header; | |
a73105b8 AQ |
247 | /* the flag field is a combination of: |
248 | * - TT_REQUEST or TT_RESPONSE | |
9cfc7bd6 SE |
249 | * - TT_FULL_TABLE |
250 | */ | |
a73105b8 AQ |
251 | uint8_t flags; |
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 | |
256 | * request | |
257 | * if TT_RESPONSE: new ttvn for the src | |
9cfc7bd6 SE |
258 | * orig_node |
259 | */ | |
a73105b8 AQ |
260 | uint8_t ttvn; |
261 | /* tt_data field is: | |
262 | * if TT_REQUEST: crc associated with the | |
263 | * ttvn | |
9cfc7bd6 SE |
264 | * if TT_RESPONSE: table_size |
265 | */ | |
266 | __be16 tt_data; | |
a73105b8 AQ |
267 | } __packed; |
268 | ||
96412690 SE |
269 | struct batadv_roam_adv_packet { |
270 | struct batadv_header header; | |
cc47f66e AQ |
271 | uint8_t reserved; |
272 | uint8_t dst[ETH_ALEN]; | |
273 | uint8_t src[ETH_ALEN]; | |
274 | uint8_t client[ETH_ALEN]; | |
275 | } __packed; | |
276 | ||
96412690 | 277 | struct batadv_tt_change { |
a73105b8 AQ |
278 | uint8_t flags; |
279 | uint8_t addr[ETH_ALEN]; | |
280 | } __packed; | |
281 | ||
3c12de9a MH |
282 | /** |
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 | |
297 | */ | |
298 | struct batadv_coded_packet { | |
299 | struct batadv_header header; | |
300 | uint8_t first_ttvn; | |
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]; | |
304 | __be32 first_crc; | |
305 | uint8_t second_ttl; | |
306 | uint8_t second_ttvn; | |
307 | uint8_t second_dest[ETH_ALEN]; | |
308 | uint8_t second_source[ETH_ALEN]; | |
309 | uint8_t second_orig_dest[ETH_ALEN]; | |
310 | __be32 second_crc; | |
e6a0b495 | 311 | __be16 coded_len; |
3c12de9a MH |
312 | }; |
313 | ||
c6c8fea2 | 314 | #endif /* _NET_BATMAN_ADV_PACKET_H_ */ |