1 /* Copyright (C) 2007-2014 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, see <http://www.gnu.org/licenses/>.
18 #ifndef _NET_BATMAN_ADV_PACKET_H_
19 #define _NET_BATMAN_ADV_PACKET_H_
22 * enum batadv_packettype - types for batman-adv encapsulated packets
23 * @BATADV_IV_OGM: originator messages for B.A.T.M.A.N. IV
24 * @BATADV_BCAST: broadcast packets carrying broadcast payload
25 * @BATADV_CODED: network coded packets
27 * @BATADV_UNICAST: unicast packets carrying unicast payload traffic
28 * @BATADV_UNICAST_FRAG: unicast packets carrying a fragment of the original
30 * @BATADV_UNICAST_4ADDR: unicast packet including the originator address of
32 * @BATADV_ICMP: unicast packet like IP ICMP used for ping or traceroute
33 * @BATADV_UNICAST_TVLV: unicast packet carrying TVLV containers
35 enum batadv_packettype {
36 /* 0x00 - 0x3f: local packets or special rules for handling */
40 /* 0x40 - 0x7f: unicast */
41 #define BATADV_UNICAST_MIN 0x40
42 BATADV_UNICAST = 0x40,
43 BATADV_UNICAST_FRAG = 0x41,
44 BATADV_UNICAST_4ADDR = 0x42,
46 BATADV_UNICAST_TVLV = 0x44,
47 #define BATADV_UNICAST_MAX 0x7f
48 /* 0x80 - 0xff: reserved */
52 * enum batadv_subtype - packet subtype for unicast4addr
53 * @BATADV_P_DATA: user payload
54 * @BATADV_P_DAT_DHT_GET: DHT request message
55 * @BATADV_P_DAT_DHT_PUT: DHT store message
56 * @BATADV_P_DAT_CACHE_REPLY: ARP reply generated by DAT
60 BATADV_P_DAT_DHT_GET = 0x02,
61 BATADV_P_DAT_DHT_PUT = 0x03,
62 BATADV_P_DAT_CACHE_REPLY = 0x04,
65 /* this file is included by batctl which needs these defines */
66 #define BATADV_COMPAT_VERSION 15
69 * enum batadv_iv_flags - flags used in B.A.T.M.A.N. IV OGM packets
70 * @BATADV_NOT_BEST_NEXT_HOP: flag is set when ogm packet is forwarded and was
71 * previously received from someone else than the best neighbor.
72 * @BATADV_PRIMARIES_FIRST_HOP: flag is set when the primary interface address
73 * is used, and the packet travels its first hop.
74 * @BATADV_DIRECTLINK: flag is for the first hop or if rebroadcasted from a
75 * one hop neighbor on the interface where it was originally received.
77 enum batadv_iv_flags {
78 BATADV_NOT_BEST_NEXT_HOP = BIT(0),
79 BATADV_PRIMARIES_FIRST_HOP = BIT(1),
80 BATADV_DIRECTLINK = BIT(2),
83 /* ICMP message types */
84 enum batadv_icmp_packettype {
85 BATADV_ECHO_REPLY = 0,
86 BATADV_DESTINATION_UNREACHABLE = 3,
87 BATADV_ECHO_REQUEST = 8,
88 BATADV_TTL_EXCEEDED = 11,
89 BATADV_PARAMETER_PROBLEM = 12,
92 /* tt data subtypes */
93 #define BATADV_TT_DATA_TYPE_MASK 0x0F
96 * enum batadv_tt_data_flags - flags for tt data tvlv
97 * @BATADV_TT_OGM_DIFF: TT diff propagated through OGM
98 * @BATADV_TT_REQUEST: TT request message
99 * @BATADV_TT_RESPONSE: TT response message
100 * @BATADV_TT_FULL_TABLE: contains full table to replace existing table
102 enum batadv_tt_data_flags {
103 BATADV_TT_OGM_DIFF = BIT(0),
104 BATADV_TT_REQUEST = BIT(1),
105 BATADV_TT_RESPONSE = BIT(2),
106 BATADV_TT_FULL_TABLE = BIT(4),
109 /* BATADV_TT_CLIENT flags.
110 * Flags from BIT(0) to BIT(7) are sent on the wire, while flags from BIT(8) to
111 * BIT(15) are used for local computation only.
112 * Flags from BIT(4) to BIT(7) are kept in sync with the rest of the network.
114 enum batadv_tt_client_flags {
115 BATADV_TT_CLIENT_DEL = BIT(0),
116 BATADV_TT_CLIENT_ROAM = BIT(1),
117 BATADV_TT_CLIENT_WIFI = BIT(4),
118 BATADV_TT_CLIENT_ISOLA = BIT(5),
119 BATADV_TT_CLIENT_NOPURGE = BIT(8),
120 BATADV_TT_CLIENT_NEW = BIT(9),
121 BATADV_TT_CLIENT_PENDING = BIT(10),
122 BATADV_TT_CLIENT_TEMP = BIT(11),
126 * batadv_vlan_flags - flags for the four MSB of any vlan ID field
127 * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not
129 enum batadv_vlan_flags {
130 BATADV_VLAN_HAS_TAG = BIT(15),
133 /* claim frame types for the bridge loop avoidance */
134 enum batadv_bla_claimframe {
135 BATADV_CLAIM_TYPE_CLAIM = 0x00,
136 BATADV_CLAIM_TYPE_UNCLAIM = 0x01,
137 BATADV_CLAIM_TYPE_ANNOUNCE = 0x02,
138 BATADV_CLAIM_TYPE_REQUEST = 0x03,
142 * enum batadv_tvlv_type - tvlv type definitions
143 * @BATADV_TVLV_GW: gateway tvlv
144 * @BATADV_TVLV_DAT: distributed arp table tvlv
145 * @BATADV_TVLV_NC: network coding tvlv
146 * @BATADV_TVLV_TT: translation table tvlv
147 * @BATADV_TVLV_ROAM: roaming advertisement tvlv
149 enum batadv_tvlv_type {
150 BATADV_TVLV_GW = 0x01,
151 BATADV_TVLV_DAT = 0x02,
152 BATADV_TVLV_NC = 0x03,
153 BATADV_TVLV_TT = 0x04,
154 BATADV_TVLV_ROAM = 0x05,
158 /* the destination hardware field in the ARP frame is used to
159 * transport the claim type and the group id
161 struct batadv_bla_claim_dst {
162 uint8_t magic[3]; /* FF:43:05 */
163 uint8_t type; /* bla_claimframe */
164 __be16 group; /* group id */
169 * struct batadv_ogm_packet - ogm (routing protocol) packet
170 * @packet_type: batman-adv packet type, part of the general header
171 * @version: batman-adv protocol version, part of the genereal header
172 * @ttl: time to live for this packet, part of the genereal header
173 * @flags: contains routing relevant flags - see enum batadv_iv_flags
174 * @tvlv_len: length of tvlv data following the ogm header
176 struct batadv_ogm_packet {
182 uint8_t orig[ETH_ALEN];
183 uint8_t prev_sender[ETH_ALEN];
187 /* __packed is not needed as the struct size is divisible by 4,
188 * and the largest data type in this struct has a size of 4.
192 #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
195 * batadv_icmp_header - common members among all the ICMP packets
196 * @packet_type: batman-adv packet type, part of the general header
197 * @version: batman-adv protocol version, part of the genereal header
198 * @ttl: time to live for this packet, part of the genereal header
199 * @msg_type: ICMP packet type
200 * @dst: address of the destination node
201 * @orig: address of the source node
202 * @uid: local ICMP socket identifier
203 * @align: not used - useful for alignment purposes only
205 * This structure is used for ICMP packets parsing only and it is never sent
206 * over the wire. The alignment field at the end is there to ensure that
207 * members are padded the same way as they are in real packets.
209 struct batadv_icmp_header {
213 uint8_t msg_type; /* see ICMP message types above */
214 uint8_t dst[ETH_ALEN];
215 uint8_t orig[ETH_ALEN];
221 * batadv_icmp_packet - ICMP packet
222 * @packet_type: batman-adv packet type, part of the general header
223 * @version: batman-adv protocol version, part of the genereal header
224 * @ttl: time to live for this packet, part of the genereal header
225 * @msg_type: ICMP packet type
226 * @dst: address of the destination node
227 * @orig: address of the source node
228 * @uid: local ICMP socket identifier
229 * @reserved: not used - useful for alignment
230 * @seqno: ICMP sequence number
232 struct batadv_icmp_packet {
236 uint8_t msg_type; /* see ICMP message types above */
237 uint8_t dst[ETH_ALEN];
238 uint8_t orig[ETH_ALEN];
244 #define BATADV_RR_LEN 16
247 * batadv_icmp_packet_rr - ICMP RouteRecord packet
248 * @packet_type: batman-adv packet type, part of the general header
249 * @version: batman-adv protocol version, part of the genereal header
250 * @ttl: time to live for this packet, part of the genereal header
251 * @msg_type: ICMP packet type
252 * @dst: address of the destination node
253 * @orig: address of the source node
254 * @uid: local ICMP socket identifier
255 * @rr_cur: number of entries the rr array
256 * @seqno: ICMP sequence number
257 * @rr: route record array
259 struct batadv_icmp_packet_rr {
263 uint8_t msg_type; /* see ICMP message types above */
264 uint8_t dst[ETH_ALEN];
265 uint8_t orig[ETH_ALEN];
269 uint8_t rr[BATADV_RR_LEN][ETH_ALEN];
272 #define BATADV_ICMP_MAX_PACKET_SIZE sizeof(struct batadv_icmp_packet_rr)
274 /* All packet headers in front of an ethernet header have to be completely
275 * divisible by 2 but not by 4 to make the payload after the ethernet
276 * header again 4 bytes boundary aligned.
278 * A packing of 2 is necessary to avoid extra padding at the end of the struct
279 * caused by a structure member which is larger than two bytes. Otherwise
280 * the structure would not fulfill the previously mentioned rule to avoid the
281 * misalignment of the payload after the ethernet header. It may also lead to
282 * leakage of information when the padding it not initialized before sending.
287 * struct batadv_unicast_packet - unicast packet for network payload
288 * @packet_type: batman-adv packet type, part of the general header
289 * @version: batman-adv protocol version, part of the genereal header
290 * @ttl: time to live for this packet, part of the genereal header
291 * @ttvn: translation table version number
292 * @dest: originator destination of the unicast packet
294 struct batadv_unicast_packet {
298 uint8_t ttvn; /* destination translation table version number */
299 uint8_t dest[ETH_ALEN];
300 /* "4 bytes boundary + 2 bytes" long to make the payload after the
301 * following ethernet header again 4 bytes boundary aligned
306 * struct batadv_unicast_4addr_packet - extended unicast packet
307 * @u: common unicast packet header
308 * @src: address of the source
309 * @subtype: packet subtype
311 struct batadv_unicast_4addr_packet {
312 struct batadv_unicast_packet u;
313 uint8_t src[ETH_ALEN];
316 /* "4 bytes boundary + 2 bytes" long to make the payload after the
317 * following ethernet header again 4 bytes boundary aligned
322 * struct batadv_frag_packet - fragmented packet
323 * @packet_type: batman-adv packet type, part of the general header
324 * @version: batman-adv protocol version, part of the genereal header
325 * @ttl: time to live for this packet, part of the genereal header
326 * @dest: final destination used when routing fragments
327 * @orig: originator of the fragment used when merging the packet
328 * @no: fragment number within this sequence
329 * @reserved: reserved byte for alignment
330 * @seqno: sequence identification
331 * @total_size: size of the merged packet
333 struct batadv_frag_packet {
335 uint8_t version; /* batman version field */
337 #if defined(__BIG_ENDIAN_BITFIELD)
340 #elif defined(__LITTLE_ENDIAN_BITFIELD)
344 #error "unknown bitfield endianess"
346 uint8_t dest[ETH_ALEN];
347 uint8_t orig[ETH_ALEN];
353 * struct batadv_bcast_packet - broadcast packet for network payload
354 * @packet_type: batman-adv packet type, part of the general header
355 * @version: batman-adv protocol version, part of the genereal header
356 * @ttl: time to live for this packet, part of the genereal header
357 * @reserved: reserved byte for alignment
358 * @seqno: sequence identification
359 * @orig: originator of the broadcast packet
361 struct batadv_bcast_packet {
363 uint8_t version; /* batman version field */
367 uint8_t orig[ETH_ALEN];
368 /* "4 bytes boundary + 2 bytes" long to make the payload after the
369 * following ethernet header again 4 bytes boundary aligned
374 * struct batadv_coded_packet - network coded packet
375 * @packet_type: batman-adv packet type, part of the general header
376 * @version: batman-adv protocol version, part of the genereal header
377 * @ttl: time to live for this packet, part of the genereal header
378 * @reserved: Align following fields to 2-byte boundaries
379 * @first_source: original source of first included packet
380 * @first_orig_dest: original destinal of first included packet
381 * @first_crc: checksum of first included packet
382 * @first_ttvn: tt-version number of first included packet
383 * @second_ttl: ttl of second packet
384 * @second_dest: second receiver of this coded packet
385 * @second_source: original source of second included packet
386 * @second_orig_dest: original destination of second included packet
387 * @second_crc: checksum of second included packet
388 * @second_ttvn: tt version number of second included packet
389 * @coded_len: length of network coded part of the payload
391 struct batadv_coded_packet {
393 uint8_t version; /* batman version field */
396 /* uint8_t first_dest[ETH_ALEN]; - saved in mac header destination */
397 uint8_t first_source[ETH_ALEN];
398 uint8_t first_orig_dest[ETH_ALEN];
402 uint8_t second_dest[ETH_ALEN];
403 uint8_t second_source[ETH_ALEN];
404 uint8_t second_orig_dest[ETH_ALEN];
412 * struct batadv_unicast_tvlv - generic unicast packet with tvlv payload
413 * @packet_type: batman-adv packet type, part of the general header
414 * @version: batman-adv protocol version, part of the genereal header
415 * @ttl: time to live for this packet, part of the genereal header
416 * @reserved: reserved field (for packet alignment)
417 * @src: address of the source
418 * @dst: address of the destination
419 * @tvlv_len: length of tvlv data following the unicast tvlv header
420 * @align: 2 bytes to align the header to a 4 byte boundry
422 struct batadv_unicast_tvlv_packet {
424 uint8_t version; /* batman version field */
427 uint8_t dst[ETH_ALEN];
428 uint8_t src[ETH_ALEN];
434 * struct batadv_tvlv_hdr - base tvlv header struct
435 * @type: tvlv container type (see batadv_tvlv_type)
436 * @version: tvlv container version
437 * @len: tvlv container length
439 struct batadv_tvlv_hdr {
446 * struct batadv_tvlv_gateway_data - gateway data propagated through gw tvlv
448 * @bandwidth_down: advertised uplink download bandwidth
449 * @bandwidth_up: advertised uplink upload bandwidth
451 struct batadv_tvlv_gateway_data {
452 __be32 bandwidth_down;
457 * struct batadv_tvlv_tt_data - tt data propagated through the tt tvlv container
458 * @flags: translation table flags (see batadv_tt_data_flags)
459 * @ttvn: translation table version number
460 * @vlan_num: number of announced VLANs. In the TVLV this struct is followed by
461 * one batadv_tvlv_tt_vlan_data object per announced vlan
463 struct batadv_tvlv_tt_data {
470 * struct batadv_tvlv_tt_vlan_data - vlan specific tt data propagated through
471 * the tt tvlv container
472 * @crc: crc32 checksum of the entries belonging to this vlan
473 * @vid: vlan identifier
474 * @reserved: unused, useful for alignment purposes
476 struct batadv_tvlv_tt_vlan_data {
483 * struct batadv_tvlv_tt_change - translation table diff data
484 * @flags: status indicators concerning the non-mesh client (see
485 * batadv_tt_client_flags)
486 * @reserved: reserved field - useful for alignment purposes only
487 * @addr: mac address of non-mesh client that triggered this tt change
488 * @vid: VLAN identifier
490 struct batadv_tvlv_tt_change {
493 uint8_t addr[ETH_ALEN];
498 * struct batadv_tvlv_roam_adv - roaming advertisement
499 * @client: mac address of roaming client
500 * @vid: VLAN identifier
502 struct batadv_tvlv_roam_adv {
503 uint8_t client[ETH_ALEN];
507 #endif /* _NET_BATMAN_ADV_PACKET_H_ */