net/batman-adv/packet.h

   1 /* Copyright (C) 2007-2016  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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef _NET_BATMAN_ADV_PACKET_H_
  19 #define _NET_BATMAN_ADV_PACKET_H_
  20
  21 #include <asm/byteorder.h>
  22 #include <linux/types.h>
  23
  24 #define batadv_tp_is_error(n) ((u8)n > 127 ? 1 : 0)
  25
  26 /**
  27  * enum batadv_packettype - types for batman-adv encapsulated packets
  28  * @BATADV_IV_OGM: originator messages for B.A.T.M.A.N. IV
  29  * @BATADV_BCAST: broadcast packets carrying broadcast payload
  30  * @BATADV_CODED: network coded packets
  31  * @BATADV_ELP: echo location packets for B.A.T.M.A.N. V
  32  * @BATADV_OGM2: originator messages for B.A.T.M.A.N. V
  33  *
  34  * @BATADV_UNICAST: unicast packets carrying unicast payload traffic
  35  * @BATADV_UNICAST_FRAG: unicast packets carrying a fragment of the original
  36  *     payload packet
  37  * @BATADV_UNICAST_4ADDR: unicast packet including the originator address of
  38  *     the sender
  39  * @BATADV_ICMP: unicast packet like IP ICMP used for ping or traceroute
  40  * @BATADV_UNICAST_TVLV: unicast packet carrying TVLV containers
  41  */
  42 enum batadv_packettype {
  43         /* 0x00 - 0x3f: local packets or special rules for handling */
  44         BATADV_IV_OGM           = 0x00,
  45         BATADV_BCAST            = 0x01,
  46         BATADV_CODED            = 0x02,
  47         BATADV_ELP              = 0x03,
  48         BATADV_OGM2             = 0x04,
  49         /* 0x40 - 0x7f: unicast */
  50 #define BATADV_UNICAST_MIN     0x40
  51         BATADV_UNICAST          = 0x40,
  52         BATADV_UNICAST_FRAG     = 0x41,
  53         BATADV_UNICAST_4ADDR    = 0x42,
  54         BATADV_ICMP             = 0x43,
  55         BATADV_UNICAST_TVLV     = 0x44,
  56 #define BATADV_UNICAST_MAX     0x7f
  57         /* 0x80 - 0xff: reserved */
  58 };
  59
  60 /**
  61  * enum batadv_subtype - packet subtype for unicast4addr
  62  * @BATADV_P_DATA: user payload
  63  * @BATADV_P_DAT_DHT_GET: DHT request message
  64  * @BATADV_P_DAT_DHT_PUT: DHT store message
  65  * @BATADV_P_DAT_CACHE_REPLY: ARP reply generated by DAT
  66  */
  67 enum batadv_subtype {
  68         BATADV_P_DATA                   = 0x01,
  69         BATADV_P_DAT_DHT_GET            = 0x02,
  70         BATADV_P_DAT_DHT_PUT            = 0x03,
  71         BATADV_P_DAT_CACHE_REPLY        = 0x04,
  72 };
  73
  74 /* this file is included by batctl which needs these defines */
  75 #define BATADV_COMPAT_VERSION 15
  76
  77 /**
  78  * enum batadv_iv_flags - flags used in B.A.T.M.A.N. IV OGM packets
  79  * @BATADV_NOT_BEST_NEXT_HOP: flag is set when ogm packet is forwarded and was
  80  *     previously received from someone else than the best neighbor.
  81  * @BATADV_PRIMARIES_FIRST_HOP: flag unused.
  82  * @BATADV_DIRECTLINK: flag is for the first hop or if rebroadcasted from a
  83  *     one hop neighbor on the interface where it was originally received.
  84  */
  85 enum batadv_iv_flags {
  86         BATADV_NOT_BEST_NEXT_HOP   = BIT(0),
  87         BATADV_PRIMARIES_FIRST_HOP = BIT(1),
  88         BATADV_DIRECTLINK          = BIT(2),
  89 };
  90
  91 /* ICMP message types */
  92 enum batadv_icmp_packettype {
  93         BATADV_ECHO_REPLY              = 0,
  94         BATADV_DESTINATION_UNREACHABLE = 3,
  95         BATADV_ECHO_REQUEST            = 8,
  96         BATADV_TTL_EXCEEDED            = 11,
  97         BATADV_PARAMETER_PROBLEM       = 12,
  98         BATADV_TP                      = 15,
  99 };
 100
 101 /**
 102  * enum batadv_mcast_flags - flags for multicast capabilities and settings
 103  * @BATADV_MCAST_WANT_ALL_UNSNOOPABLES: we want all packets destined for
 104  *  224.0.0.0/24 or ff02::1
 105  * @BATADV_MCAST_WANT_ALL_IPV4: we want all IPv4 multicast packets
 106  * @BATADV_MCAST_WANT_ALL_IPV6: we want all IPv6 multicast packets
 107  */
 108 enum batadv_mcast_flags {
 109         BATADV_MCAST_WANT_ALL_UNSNOOPABLES      = BIT(0),
 110         BATADV_MCAST_WANT_ALL_IPV4              = BIT(1),
 111         BATADV_MCAST_WANT_ALL_IPV6              = BIT(2),
 112 };
 113
 114 /* tt data subtypes */
 115 #define BATADV_TT_DATA_TYPE_MASK 0x0F
 116
 117 /**
 118  * enum batadv_tt_data_flags - flags for tt data tvlv
 119  * @BATADV_TT_OGM_DIFF: TT diff propagated through OGM
 120  * @BATADV_TT_REQUEST: TT request message
 121  * @BATADV_TT_RESPONSE: TT response message
 122  * @BATADV_TT_FULL_TABLE: contains full table to replace existing table
 123  */
 124 enum batadv_tt_data_flags {
 125         BATADV_TT_OGM_DIFF   = BIT(0),
 126         BATADV_TT_REQUEST    = BIT(1),
 127         BATADV_TT_RESPONSE   = BIT(2),
 128         BATADV_TT_FULL_TABLE = BIT(4),
 129 };
 130
 131 /**
 132  * enum batadv_vlan_flags - flags for the four MSB of any vlan ID field
 133  * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not
 134  */
 135 enum batadv_vlan_flags {
 136         BATADV_VLAN_HAS_TAG     = BIT(15),
 137 };
 138
 139 /* claim frame types for the bridge loop avoidance */
 140 enum batadv_bla_claimframe {
 141         BATADV_CLAIM_TYPE_CLAIM         = 0x00,
 142         BATADV_CLAIM_TYPE_UNCLAIM       = 0x01,
 143         BATADV_CLAIM_TYPE_ANNOUNCE      = 0x02,
 144         BATADV_CLAIM_TYPE_REQUEST       = 0x03,
 145         BATADV_CLAIM_TYPE_LOOPDETECT    = 0x04,
 146 };
 147
 148 /**
 149  * enum batadv_tvlv_type - tvlv type definitions
 150  * @BATADV_TVLV_GW: gateway tvlv
 151  * @BATADV_TVLV_DAT: distributed arp table tvlv
 152  * @BATADV_TVLV_NC: network coding tvlv
 153  * @BATADV_TVLV_TT: translation table tvlv
 154  * @BATADV_TVLV_ROAM: roaming advertisement tvlv
 155  * @BATADV_TVLV_MCAST: multicast capability tvlv
 156  */
 157 enum batadv_tvlv_type {
 158         BATADV_TVLV_GW          = 0x01,
 159         BATADV_TVLV_DAT         = 0x02,
 160         BATADV_TVLV_NC          = 0x03,
 161         BATADV_TVLV_TT          = 0x04,
 162         BATADV_TVLV_ROAM        = 0x05,
 163         BATADV_TVLV_MCAST       = 0x06,
 164 };
 165
 166 #pragma pack(2)
 167 /* the destination hardware field in the ARP frame is used to
 168  * transport the claim type and the group id
 169  */
 170 struct batadv_bla_claim_dst {
 171         u8     magic[3];        /* FF:43:05 */
 172         u8     type;            /* bla_claimframe */
 173         __be16 group;           /* group id */
 174 };
 175
 176 #pragma pack()
 177
 178 /**
 179  * struct batadv_ogm_packet - ogm (routing protocol) packet
 180  * @packet_type: batman-adv packet type, part of the general header
 181  * @version: batman-adv protocol version, part of the genereal header
 182  * @ttl: time to live for this packet, part of the genereal header
 183  * @flags: contains routing relevant flags - see enum batadv_iv_flags
 184  * @seqno: sequence identification
 185  * @orig: address of the source node
 186  * @prev_sender: address of the previous sender
 187  * @reserved: reserved byte for alignment
 188  * @tq: transmission quality
 189  * @tvlv_len: length of tvlv data following the ogm header
 190  */
 191 struct batadv_ogm_packet {
 192         u8     packet_type;
 193         u8     version;
 194         u8     ttl;
 195         u8     flags;
 196         __be32 seqno;
 197         u8     orig[ETH_ALEN];
 198         u8     prev_sender[ETH_ALEN];
 199         u8     reserved;
 200         u8     tq;
 201         __be16 tvlv_len;
 202         /* __packed is not needed as the struct size is divisible by 4,
 203          * and the largest data type in this struct has a size of 4.
 204          */
 205 };
 206
 207 #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
 208
 209 /**
 210  * struct batadv_ogm2_packet - ogm2 (routing protocol) packet
 211  * @packet_type: batman-adv packet type, part of the general header
 212  * @version: batman-adv protocol version, part of the general header
 213  * @ttl: time to live for this packet, part of the general header
 214  * @flags: reseved for routing relevant flags - currently always 0
 215  * @seqno: sequence number
 216  * @orig: originator mac address
 217  * @tvlv_len: length of the appended tvlv buffer (in bytes)
 218  * @throughput: the currently flooded path throughput
 219  */
 220 struct batadv_ogm2_packet {
 221         u8     packet_type;
 222         u8     version;
 223         u8     ttl;
 224         u8     flags;
 225         __be32 seqno;
 226         u8     orig[ETH_ALEN];
 227         __be16 tvlv_len;
 228         __be32 throughput;
 229         /* __packed is not needed as the struct size is divisible by 4,
 230          * and the largest data type in this struct has a size of 4.
 231          */
 232 };
 233
 234 #define BATADV_OGM2_HLEN sizeof(struct batadv_ogm2_packet)
 235
 236 /**
 237  * struct batadv_elp_packet - elp (neighbor discovery) packet
 238  * @packet_type: batman-adv packet type, part of the general header
 239  * @version: batman-adv protocol version, part of the genereal header
 240  * @orig: originator mac address
 241  * @seqno: sequence number
 242  * @elp_interval: currently used ELP sending interval in ms
 243  */
 244 struct batadv_elp_packet {
 245         u8     packet_type;
 246         u8     version;
 247         u8     orig[ETH_ALEN];
 248         __be32 seqno;
 249         __be32 elp_interval;
 250 };
 251
 252 #define BATADV_ELP_HLEN sizeof(struct batadv_elp_packet)
 253
 254 /**
 255  * enum batadv_icmp_user_cmd_type - types for batman-adv icmp cmd modes
 256  * @BATADV_TP_START: start a throughput meter run
 257  * @BATADV_TP_STOP: stop a throughput meter run
 258  */
 259 enum batadv_icmp_user_cmd_type {
 260         BATADV_TP_START         = 0,
 261         BATADV_TP_STOP          = 2,
 262 };
 263
 264 /**
 265  * struct batadv_icmp_header - common members among all the ICMP packets
 266  * @packet_type: batman-adv packet type, part of the general header
 267  * @version: batman-adv protocol version, part of the genereal header
 268  * @ttl: time to live for this packet, part of the genereal header
 269  * @msg_type: ICMP packet type
 270  * @dst: address of the destination node
 271  * @orig: address of the source node
 272  * @uid: local ICMP socket identifier
 273  * @align: not used - useful for alignment purposes only
 274  *
 275  * This structure is used for ICMP packets parsing only and it is never sent
 276  * over the wire. The alignment field at the end is there to ensure that
 277  * members are padded the same way as they are in real packets.
 278  */
 279 struct batadv_icmp_header {
 280         u8 packet_type;
 281         u8 version;
 282         u8 ttl;
 283         u8 msg_type; /* see ICMP message types above */
 284         u8 dst[ETH_ALEN];
 285         u8 orig[ETH_ALEN];
 286         u8 uid;
 287         u8 align[3];
 288 };
 289
 290 /**
 291  * struct batadv_icmp_packet - ICMP packet
 292  * @packet_type: batman-adv packet type, part of the general header
 293  * @version: batman-adv protocol version, part of the genereal header
 294  * @ttl: time to live for this packet, part of the genereal header
 295  * @msg_type: ICMP packet type
 296  * @dst: address of the destination node
 297  * @orig: address of the source node
 298  * @uid: local ICMP socket identifier
 299  * @reserved: not used - useful for alignment
 300  * @seqno: ICMP sequence number
 301  */
 302 struct batadv_icmp_packet {
 303         u8     packet_type;
 304         u8     version;
 305         u8     ttl;
 306         u8     msg_type; /* see ICMP message types above */
 307         u8     dst[ETH_ALEN];
 308         u8     orig[ETH_ALEN];
 309         u8     uid;
 310         u8     reserved;
 311         __be16 seqno;
 312 };
 313
 314 /**
 315  * struct batadv_icmp_tp_packet - ICMP TP Meter packet
 316  * @packet_type: batman-adv packet type, part of the general header
 317  * @version: batman-adv protocol version, part of the genereal header
 318  * @ttl: time to live for this packet, part of the genereal header
 319  * @msg_type: ICMP packet type
 320  * @dst: address of the destination node
 321  * @orig: address of the source node
 322  * @uid: local ICMP socket identifier
 323  * @subtype: TP packet subtype (see batadv_icmp_tp_subtype)
 324  * @session: TP session identifier
 325  * @seqno: the TP sequence number
 326  * @timestamp: time when the packet has been sent. This value is filled in a
 327  *  TP_MSG and echoed back in the next TP_ACK so that the sender can compute the
 328  *  RTT. Since it is read only by the host which wrote it, there is no need to
 329  *  store it using network order
 330  */
 331 struct batadv_icmp_tp_packet {
 332         u8  packet_type;
 333         u8  version;
 334         u8  ttl;
 335         u8  msg_type; /* see ICMP message types above */
 336         u8  dst[ETH_ALEN];
 337         u8  orig[ETH_ALEN];
 338         u8  uid;
 339         u8  subtype;
 340         u8  session[2];
 341         __be32 seqno;
 342         __be32 timestamp;
 343 };
 344
 345 /**
 346  * enum batadv_icmp_tp_subtype - ICMP TP Meter packet subtypes
 347  * @BATADV_TP_MSG: Msg from sender to receiver
 348  * @BATADV_TP_ACK: acknowledgment from receiver to sender
 349  */
 350 enum batadv_icmp_tp_subtype {
 351         BATADV_TP_MSG   = 0,
 352         BATADV_TP_ACK,
 353 };
 354
 355 #define BATADV_RR_LEN 16
 356
 357 /**
 358  * struct batadv_icmp_packet_rr - ICMP RouteRecord packet
 359  * @packet_type: batman-adv packet type, part of the general header
 360  * @version: batman-adv protocol version, part of the genereal header
 361  * @ttl: time to live for this packet, part of the genereal header
 362  * @msg_type: ICMP packet type
 363  * @dst: address of the destination node
 364  * @orig: address of the source node
 365  * @uid: local ICMP socket identifier
 366  * @rr_cur: number of entries the rr array
 367  * @seqno: ICMP sequence number
 368  * @rr: route record array
 369  */
 370 struct batadv_icmp_packet_rr {
 371         u8     packet_type;
 372         u8     version;
 373         u8     ttl;
 374         u8     msg_type; /* see ICMP message types above */
 375         u8     dst[ETH_ALEN];
 376         u8     orig[ETH_ALEN];
 377         u8     uid;
 378         u8     rr_cur;
 379         __be16 seqno;
 380         u8     rr[BATADV_RR_LEN][ETH_ALEN];
 381 };
 382
 383 #define BATADV_ICMP_MAX_PACKET_SIZE     sizeof(struct batadv_icmp_packet_rr)
 384
 385 /* All packet headers in front of an ethernet header have to be completely
 386  * divisible by 2 but not by 4 to make the payload after the ethernet
 387  * header again 4 bytes boundary aligned.
 388  *
 389  * A packing of 2 is necessary to avoid extra padding at the end of the struct
 390  * caused by a structure member which is larger than two bytes. Otherwise
 391  * the structure would not fulfill the previously mentioned rule to avoid the
 392  * misalignment of the payload after the ethernet header. It may also lead to
 393  * leakage of information when the padding it not initialized before sending.
 394  */
 395 #pragma pack(2)
 396
 397 /**
 398  * struct batadv_unicast_packet - unicast packet for network payload
 399  * @packet_type: batman-adv packet type, part of the general header
 400  * @version: batman-adv protocol version, part of the genereal header
 401  * @ttl: time to live for this packet, part of the genereal header
 402  * @ttvn: translation table version number
 403  * @dest: originator destination of the unicast packet
 404  */
 405 struct batadv_unicast_packet {
 406         u8 packet_type;
 407         u8 version;
 408         u8 ttl;
 409         u8 ttvn; /* destination translation table version number */
 410         u8 dest[ETH_ALEN];
 411         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 412          * following ethernet header again 4 bytes boundary aligned
 413          */
 414 };
 415
 416 /**
 417  * struct batadv_unicast_4addr_packet - extended unicast packet
 418  * @u: common unicast packet header
 419  * @src: address of the source
 420  * @subtype: packet subtype
 421  * @reserved: reserved byte for alignment
 422  */
 423 struct batadv_unicast_4addr_packet {
 424         struct batadv_unicast_packet u;
 425         u8 src[ETH_ALEN];
 426         u8 subtype;
 427         u8 reserved;
 428         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 429          * following ethernet header again 4 bytes boundary aligned
 430          */
 431 };
 432
 433 /**
 434  * struct batadv_frag_packet - fragmented packet
 435  * @packet_type: batman-adv packet type, part of the general header
 436  * @version: batman-adv protocol version, part of the genereal header
 437  * @ttl: time to live for this packet, part of the genereal header
 438  * @dest: final destination used when routing fragments
 439  * @orig: originator of the fragment used when merging the packet
 440  * @no: fragment number within this sequence
 441  * @priority: priority of frame, from ToS IP precedence or 802.1p
 442  * @reserved: reserved byte for alignment
 443  * @seqno: sequence identification
 444  * @total_size: size of the merged packet
 445  */
 446 struct batadv_frag_packet {
 447         u8     packet_type;
 448         u8     version;  /* batman version field */
 449         u8     ttl;
 450 #if defined(__BIG_ENDIAN_BITFIELD)
 451         u8     no:4;
 452         u8     priority:3;
 453         u8     reserved:1;
 454 #elif defined(__LITTLE_ENDIAN_BITFIELD)
 455         u8     reserved:1;
 456         u8     priority:3;
 457         u8     no:4;
 458 #else
 459 #error "unknown bitfield endianness"
 460 #endif
 461         u8     dest[ETH_ALEN];
 462         u8     orig[ETH_ALEN];
 463         __be16 seqno;
 464         __be16 total_size;
 465 };
 466
 467 /**
 468  * struct batadv_bcast_packet - broadcast packet for network payload
 469  * @packet_type: batman-adv packet type, part of the general header
 470  * @version: batman-adv protocol version, part of the genereal header
 471  * @ttl: time to live for this packet, part of the genereal header
 472  * @reserved: reserved byte for alignment
 473  * @seqno: sequence identification
 474  * @orig: originator of the broadcast packet
 475  */
 476 struct batadv_bcast_packet {
 477         u8     packet_type;
 478         u8     version;  /* batman version field */
 479         u8     ttl;
 480         u8     reserved;
 481         __be32 seqno;
 482         u8     orig[ETH_ALEN];
 483         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 484          * following ethernet header again 4 bytes boundary aligned
 485          */
 486 };
 487
 488 /**
 489  * struct batadv_coded_packet - network coded packet
 490  * @packet_type: batman-adv packet type, part of the general header
 491  * @version: batman-adv protocol version, part of the genereal header
 492  * @ttl: time to live for this packet, part of the genereal header
 493  * @first_source: original source of first included packet
 494  * @first_orig_dest: original destinal of first included packet
 495  * @first_crc: checksum of first included packet
 496  * @first_ttvn: tt-version number of first included packet
 497  * @second_ttl: ttl of second packet
 498  * @second_dest: second receiver of this coded packet
 499  * @second_source: original source of second included packet
 500  * @second_orig_dest: original destination of second included packet
 501  * @second_crc: checksum of second included packet
 502  * @second_ttvn: tt version number of second included packet
 503  * @coded_len: length of network coded part of the payload
 504  */
 505 struct batadv_coded_packet {
 506         u8     packet_type;
 507         u8     version;  /* batman version field */
 508         u8     ttl;
 509         u8     first_ttvn;
 510         /* u8  first_dest[ETH_ALEN]; - saved in mac header destination */
 511         u8     first_source[ETH_ALEN];
 512         u8     first_orig_dest[ETH_ALEN];
 513         __be32 first_crc;
 514         u8     second_ttl;
 515         u8     second_ttvn;
 516         u8     second_dest[ETH_ALEN];
 517         u8     second_source[ETH_ALEN];
 518         u8     second_orig_dest[ETH_ALEN];
 519         __be32 second_crc;
 520         __be16 coded_len;
 521 };
 522
 523 #pragma pack()
 524
 525 /**
 526  * struct batadv_unicast_tvlv_packet - generic unicast packet with tvlv payload
 527  * @packet_type: batman-adv packet type, part of the general header
 528  * @version: batman-adv protocol version, part of the genereal header
 529  * @ttl: time to live for this packet, part of the genereal header
 530  * @reserved: reserved field (for packet alignment)
 531  * @src: address of the source
 532  * @dst: address of the destination
 533  * @tvlv_len: length of tvlv data following the unicast tvlv header
 534  * @align: 2 bytes to align the header to a 4 byte boundary
 535  */
 536 struct batadv_unicast_tvlv_packet {
 537         u8     packet_type;
 538         u8     version;  /* batman version field */
 539         u8     ttl;
 540         u8     reserved;
 541         u8     dst[ETH_ALEN];
 542         u8     src[ETH_ALEN];
 543         __be16 tvlv_len;
 544         u16    align;
 545 };
 546
 547 /**
 548  * struct batadv_tvlv_hdr - base tvlv header struct
 549  * @type: tvlv container type (see batadv_tvlv_type)
 550  * @version: tvlv container version
 551  * @len: tvlv container length
 552  */
 553 struct batadv_tvlv_hdr {
 554         u8     type;
 555         u8     version;
 556         __be16 len;
 557 };
 558
 559 /**
 560  * struct batadv_tvlv_gateway_data - gateway data propagated through gw tvlv
 561  *  container
 562  * @bandwidth_down: advertised uplink download bandwidth
 563  * @bandwidth_up: advertised uplink upload bandwidth
 564  */
 565 struct batadv_tvlv_gateway_data {
 566         __be32 bandwidth_down;
 567         __be32 bandwidth_up;
 568 };
 569
 570 /**
 571  * struct batadv_tvlv_tt_data - tt data propagated through the tt tvlv container
 572  * @flags: translation table flags (see batadv_tt_data_flags)
 573  * @ttvn: translation table version number
 574  * @num_vlan: number of announced VLANs. In the TVLV this struct is followed by
 575  *  one batadv_tvlv_tt_vlan_data object per announced vlan
 576  */
 577 struct batadv_tvlv_tt_data {
 578         u8     flags;
 579         u8     ttvn;
 580         __be16 num_vlan;
 581 };
 582
 583 /**
 584  * struct batadv_tvlv_tt_vlan_data - vlan specific tt data propagated through
 585  *  the tt tvlv container
 586  * @crc: crc32 checksum of the entries belonging to this vlan
 587  * @vid: vlan identifier
 588  * @reserved: unused, useful for alignment purposes
 589  */
 590 struct batadv_tvlv_tt_vlan_data {
 591         __be32 crc;
 592         __be16 vid;
 593         u16    reserved;
 594 };
 595
 596 /**
 597  * struct batadv_tvlv_tt_change - translation table diff data
 598  * @flags: status indicators concerning the non-mesh client (see
 599  *  batadv_tt_client_flags)
 600  * @reserved: reserved field - useful for alignment purposes only
 601  * @addr: mac address of non-mesh client that triggered this tt change
 602  * @vid: VLAN identifier
 603  */
 604 struct batadv_tvlv_tt_change {
 605         u8     flags;
 606         u8     reserved[3];
 607         u8     addr[ETH_ALEN];
 608         __be16 vid;
 609 };
 610
 611 /**
 612  * struct batadv_tvlv_roam_adv - roaming advertisement
 613  * @client: mac address of roaming client
 614  * @vid: VLAN identifier
 615  */
 616 struct batadv_tvlv_roam_adv {
 617         u8     client[ETH_ALEN];
 618         __be16 vid;
 619 };
 620
 621 /**
 622  * struct batadv_tvlv_mcast_data - payload of a multicast tvlv
 623  * @flags: multicast flags announced by the orig node
 624  * @reserved: reserved field
 625  */
 626 struct batadv_tvlv_mcast_data {
 627         u8 flags;
 628         u8 reserved[3];
 629 };
 630
 631 #endif /* _NET_BATMAN_ADV_PACKET_H_ */