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 /**
  25  * enum batadv_packettype - types for batman-adv encapsulated packets
  26  * @BATADV_IV_OGM: originator messages for B.A.T.M.A.N. IV
  27  * @BATADV_BCAST: broadcast packets carrying broadcast payload
  28  * @BATADV_CODED: network coded packets
  29  * @BATADV_ELP: echo location packets for B.A.T.M.A.N. V
  30  * @BATADV_OGM2: originator messages for B.A.T.M.A.N. V
  31  *
  32  * @BATADV_UNICAST: unicast packets carrying unicast payload traffic
  33  * @BATADV_UNICAST_FRAG: unicast packets carrying a fragment of the original
  34  *     payload packet
  35  * @BATADV_UNICAST_4ADDR: unicast packet including the originator address of
  36  *     the sender
  37  * @BATADV_ICMP: unicast packet like IP ICMP used for ping or traceroute
  38  * @BATADV_UNICAST_TVLV: unicast packet carrying TVLV containers
  39  */
  40 enum batadv_packettype {
  41         /* 0x00 - 0x3f: local packets or special rules for handling */
  42         BATADV_IV_OGM           = 0x00,
  43         BATADV_BCAST            = 0x01,
  44         BATADV_CODED            = 0x02,
  45         BATADV_ELP              = 0x03,
  46         BATADV_OGM2             = 0x04,
  47         /* 0x40 - 0x7f: unicast */
  48 #define BATADV_UNICAST_MIN     0x40
  49         BATADV_UNICAST          = 0x40,
  50         BATADV_UNICAST_FRAG     = 0x41,
  51         BATADV_UNICAST_4ADDR    = 0x42,
  52         BATADV_ICMP             = 0x43,
  53         BATADV_UNICAST_TVLV     = 0x44,
  54 #define BATADV_UNICAST_MAX     0x7f
  55         /* 0x80 - 0xff: reserved */
  56 };
  57
  58 /**
  59  * enum batadv_subtype - packet subtype for unicast4addr
  60  * @BATADV_P_DATA: user payload
  61  * @BATADV_P_DAT_DHT_GET: DHT request message
  62  * @BATADV_P_DAT_DHT_PUT: DHT store message
  63  * @BATADV_P_DAT_CACHE_REPLY: ARP reply generated by DAT
  64  */
  65 enum batadv_subtype {
  66         BATADV_P_DATA                   = 0x01,
  67         BATADV_P_DAT_DHT_GET            = 0x02,
  68         BATADV_P_DAT_DHT_PUT            = 0x03,
  69         BATADV_P_DAT_CACHE_REPLY        = 0x04,
  70 };
  71
  72 /* this file is included by batctl which needs these defines */
  73 #define BATADV_COMPAT_VERSION 15
  74
  75 /**
  76  * enum batadv_iv_flags - flags used in B.A.T.M.A.N. IV OGM packets
  77  * @BATADV_NOT_BEST_NEXT_HOP: flag is set when ogm packet is forwarded and was
  78  *     previously received from someone else than the best neighbor.
  79  * @BATADV_PRIMARIES_FIRST_HOP: flag unused.
  80  * @BATADV_DIRECTLINK: flag is for the first hop or if rebroadcasted from a
  81  *     one hop neighbor on the interface where it was originally received.
  82  */
  83 enum batadv_iv_flags {
  84         BATADV_NOT_BEST_NEXT_HOP   = BIT(0),
  85         BATADV_PRIMARIES_FIRST_HOP = BIT(1),
  86         BATADV_DIRECTLINK          = BIT(2),
  87 };
  88
  89 /* ICMP message types */
  90 enum batadv_icmp_packettype {
  91         BATADV_ECHO_REPLY              = 0,
  92         BATADV_DESTINATION_UNREACHABLE = 3,
  93         BATADV_ECHO_REQUEST            = 8,
  94         BATADV_TTL_EXCEEDED            = 11,
  95         BATADV_PARAMETER_PROBLEM       = 12,
  96 };
  97
  98 /**
  99  * enum batadv_mcast_flags - flags for multicast capabilities and settings
 100  * @BATADV_MCAST_WANT_ALL_UNSNOOPABLES: we want all packets destined for
 101  *  224.0.0.0/24 or ff02::1
 102  * @BATADV_MCAST_WANT_ALL_IPV4: we want all IPv4 multicast packets
 103  * @BATADV_MCAST_WANT_ALL_IPV6: we want all IPv6 multicast packets
 104  */
 105 enum batadv_mcast_flags {
 106         BATADV_MCAST_WANT_ALL_UNSNOOPABLES      = BIT(0),
 107         BATADV_MCAST_WANT_ALL_IPV4              = BIT(1),
 108         BATADV_MCAST_WANT_ALL_IPV6              = BIT(2),
 109 };
 110
 111 /* tt data subtypes */
 112 #define BATADV_TT_DATA_TYPE_MASK 0x0F
 113
 114 /**
 115  * enum batadv_tt_data_flags - flags for tt data tvlv
 116  * @BATADV_TT_OGM_DIFF: TT diff propagated through OGM
 117  * @BATADV_TT_REQUEST: TT request message
 118  * @BATADV_TT_RESPONSE: TT response message
 119  * @BATADV_TT_FULL_TABLE: contains full table to replace existing table
 120  */
 121 enum batadv_tt_data_flags {
 122         BATADV_TT_OGM_DIFF   = BIT(0),
 123         BATADV_TT_REQUEST    = BIT(1),
 124         BATADV_TT_RESPONSE   = BIT(2),
 125         BATADV_TT_FULL_TABLE = BIT(4),
 126 };
 127
 128 /**
 129  * enum batadv_tt_client_flags - TT client specific flags
 130  * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table
 131  * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new
 132  *  update telling its new real location has not been received/sent yet
 133  * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface.
 134  *  This information is used by the "AP Isolation" feature
 135  * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This
 136  *  information is used by the Extended Isolation feature
 137  * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table
 138  * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has
 139  *  not been announced yet
 140  * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept
 141  *  in the table for one more originator interval for consistency purposes
 142  * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of
 143  *  the network but no nnode has already announced it
 144  *
 145  * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire.
 146  * Bits from 8 to 15 are called _local flags_ because they are used for local
 147  * computations only.
 148  *
 149  * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with
 150  * the other nodes in the network. To achieve this goal these flags are included
 151  * in the TT CRC computation.
 152  */
 153 enum batadv_tt_client_flags {
 154         BATADV_TT_CLIENT_DEL     = BIT(0),
 155         BATADV_TT_CLIENT_ROAM    = BIT(1),
 156         BATADV_TT_CLIENT_WIFI    = BIT(4),
 157         BATADV_TT_CLIENT_ISOLA   = BIT(5),
 158         BATADV_TT_CLIENT_NOPURGE = BIT(8),
 159         BATADV_TT_CLIENT_NEW     = BIT(9),
 160         BATADV_TT_CLIENT_PENDING = BIT(10),
 161         BATADV_TT_CLIENT_TEMP    = BIT(11),
 162 };
 163
 164 /**
 165  * enum batadv_vlan_flags - flags for the four MSB of any vlan ID field
 166  * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not
 167  */
 168 enum batadv_vlan_flags {
 169         BATADV_VLAN_HAS_TAG     = BIT(15),
 170 };
 171
 172 /* claim frame types for the bridge loop avoidance */
 173 enum batadv_bla_claimframe {
 174         BATADV_CLAIM_TYPE_CLAIM         = 0x00,
 175         BATADV_CLAIM_TYPE_UNCLAIM       = 0x01,
 176         BATADV_CLAIM_TYPE_ANNOUNCE      = 0x02,
 177         BATADV_CLAIM_TYPE_REQUEST       = 0x03,
 178 };
 179
 180 /**
 181  * enum batadv_tvlv_type - tvlv type definitions
 182  * @BATADV_TVLV_GW: gateway tvlv
 183  * @BATADV_TVLV_DAT: distributed arp table tvlv
 184  * @BATADV_TVLV_NC: network coding tvlv
 185  * @BATADV_TVLV_TT: translation table tvlv
 186  * @BATADV_TVLV_ROAM: roaming advertisement tvlv
 187  * @BATADV_TVLV_MCAST: multicast capability tvlv
 188  */
 189 enum batadv_tvlv_type {
 190         BATADV_TVLV_GW          = 0x01,
 191         BATADV_TVLV_DAT         = 0x02,
 192         BATADV_TVLV_NC          = 0x03,
 193         BATADV_TVLV_TT          = 0x04,
 194         BATADV_TVLV_ROAM        = 0x05,
 195         BATADV_TVLV_MCAST       = 0x06,
 196 };
 197
 198 #pragma pack(2)
 199 /* the destination hardware field in the ARP frame is used to
 200  * transport the claim type and the group id
 201  */
 202 struct batadv_bla_claim_dst {
 203         u8     magic[3];        /* FF:43:05 */
 204         u8     type;            /* bla_claimframe */
 205         __be16 group;           /* group id */
 206 };
 207
 208 #pragma pack()
 209
 210 /**
 211  * struct batadv_ogm_packet - ogm (routing protocol) packet
 212  * @packet_type: batman-adv packet type, part of the general header
 213  * @version: batman-adv protocol version, part of the genereal header
 214  * @ttl: time to live for this packet, part of the genereal header
 215  * @flags: contains routing relevant flags - see enum batadv_iv_flags
 216  * @seqno: sequence identification
 217  * @orig: address of the source node
 218  * @prev_sender: address of the previous sender
 219  * @reserved: reserved byte for alignment
 220  * @tq: transmission quality
 221  * @tvlv_len: length of tvlv data following the ogm header
 222  */
 223 struct batadv_ogm_packet {
 224         u8     packet_type;
 225         u8     version;
 226         u8     ttl;
 227         u8     flags;
 228         __be32 seqno;
 229         u8     orig[ETH_ALEN];
 230         u8     prev_sender[ETH_ALEN];
 231         u8     reserved;
 232         u8     tq;
 233         __be16 tvlv_len;
 234         /* __packed is not needed as the struct size is divisible by 4,
 235          * and the largest data type in this struct has a size of 4.
 236          */
 237 };
 238
 239 #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
 240
 241 /**
 242  * struct batadv_ogm2_packet - ogm2 (routing protocol) packet
 243  * @packet_type: batman-adv packet type, part of the general header
 244  * @version: batman-adv protocol version, part of the general header
 245  * @ttl: time to live for this packet, part of the general header
 246  * @flags: reseved for routing relevant flags - currently always 0
 247  * @seqno: sequence number
 248  * @orig: originator mac address
 249  * @tvlv_len: length of the appended tvlv buffer (in bytes)
 250  * @throughput: the currently flooded path throughput
 251  */
 252 struct batadv_ogm2_packet {
 253         u8     packet_type;
 254         u8     version;
 255         u8     ttl;
 256         u8     flags;
 257         __be32 seqno;
 258         u8     orig[ETH_ALEN];
 259         __be16 tvlv_len;
 260         __be32 throughput;
 261         /* __packed is not needed as the struct size is divisible by 4,
 262          * and the largest data type in this struct has a size of 4.
 263          */
 264 };
 265
 266 #define BATADV_OGM2_HLEN sizeof(struct batadv_ogm2_packet)
 267
 268 /**
 269  * struct batadv_elp_packet - elp (neighbor discovery) packet
 270  * @packet_type: batman-adv packet type, part of the general header
 271  * @version: batman-adv protocol version, part of the genereal header
 272  * @orig: originator mac address
 273  * @seqno: sequence number
 274  * @elp_interval: currently used ELP sending interval in ms
 275  */
 276 struct batadv_elp_packet {
 277         u8     packet_type;
 278         u8     version;
 279         u8     orig[ETH_ALEN];
 280         __be32 seqno;
 281         __be32 elp_interval;
 282 };
 283
 284 #define BATADV_ELP_HLEN sizeof(struct batadv_elp_packet)
 285
 286 /**
 287  * struct batadv_icmp_header - common members among all the ICMP packets
 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  * @msg_type: ICMP packet type
 292  * @dst: address of the destination node
 293  * @orig: address of the source node
 294  * @uid: local ICMP socket identifier
 295  * @align: not used - useful for alignment purposes only
 296  *
 297  * This structure is used for ICMP packets parsing only and it is never sent
 298  * over the wire. The alignment field at the end is there to ensure that
 299  * members are padded the same way as they are in real packets.
 300  */
 301 struct batadv_icmp_header {
 302         u8 packet_type;
 303         u8 version;
 304         u8 ttl;
 305         u8 msg_type; /* see ICMP message types above */
 306         u8 dst[ETH_ALEN];
 307         u8 orig[ETH_ALEN];
 308         u8 uid;
 309         u8 align[3];
 310 };
 311
 312 /**
 313  * struct batadv_icmp_packet - ICMP packet
 314  * @packet_type: batman-adv packet type, part of the general header
 315  * @version: batman-adv protocol version, part of the genereal header
 316  * @ttl: time to live for this packet, part of the genereal header
 317  * @msg_type: ICMP packet type
 318  * @dst: address of the destination node
 319  * @orig: address of the source node
 320  * @uid: local ICMP socket identifier
 321  * @reserved: not used - useful for alignment
 322  * @seqno: ICMP sequence number
 323  */
 324 struct batadv_icmp_packet {
 325         u8     packet_type;
 326         u8     version;
 327         u8     ttl;
 328         u8     msg_type; /* see ICMP message types above */
 329         u8     dst[ETH_ALEN];
 330         u8     orig[ETH_ALEN];
 331         u8     uid;
 332         u8     reserved;
 333         __be16 seqno;
 334 };
 335
 336 #define BATADV_RR_LEN 16
 337
 338 /**
 339  * struct batadv_icmp_packet_rr - ICMP RouteRecord packet
 340  * @packet_type: batman-adv packet type, part of the general header
 341  * @version: batman-adv protocol version, part of the genereal header
 342  * @ttl: time to live for this packet, part of the genereal header
 343  * @msg_type: ICMP packet type
 344  * @dst: address of the destination node
 345  * @orig: address of the source node
 346  * @uid: local ICMP socket identifier
 347  * @rr_cur: number of entries the rr array
 348  * @seqno: ICMP sequence number
 349  * @rr: route record array
 350  */
 351 struct batadv_icmp_packet_rr {
 352         u8     packet_type;
 353         u8     version;
 354         u8     ttl;
 355         u8     msg_type; /* see ICMP message types above */
 356         u8     dst[ETH_ALEN];
 357         u8     orig[ETH_ALEN];
 358         u8     uid;
 359         u8     rr_cur;
 360         __be16 seqno;
 361         u8     rr[BATADV_RR_LEN][ETH_ALEN];
 362 };
 363
 364 #define BATADV_ICMP_MAX_PACKET_SIZE     sizeof(struct batadv_icmp_packet_rr)
 365
 366 /* All packet headers in front of an ethernet header have to be completely
 367  * divisible by 2 but not by 4 to make the payload after the ethernet
 368  * header again 4 bytes boundary aligned.
 369  *
 370  * A packing of 2 is necessary to avoid extra padding at the end of the struct
 371  * caused by a structure member which is larger than two bytes. Otherwise
 372  * the structure would not fulfill the previously mentioned rule to avoid the
 373  * misalignment of the payload after the ethernet header. It may also lead to
 374  * leakage of information when the padding it not initialized before sending.
 375  */
 376 #pragma pack(2)
 377
 378 /**
 379  * struct batadv_unicast_packet - unicast packet for network payload
 380  * @packet_type: batman-adv packet type, part of the general header
 381  * @version: batman-adv protocol version, part of the genereal header
 382  * @ttl: time to live for this packet, part of the genereal header
 383  * @ttvn: translation table version number
 384  * @dest: originator destination of the unicast packet
 385  */
 386 struct batadv_unicast_packet {
 387         u8 packet_type;
 388         u8 version;
 389         u8 ttl;
 390         u8 ttvn; /* destination translation table version number */
 391         u8 dest[ETH_ALEN];
 392         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 393          * following ethernet header again 4 bytes boundary aligned
 394          */
 395 };
 396
 397 /**
 398  * struct batadv_unicast_4addr_packet - extended unicast packet
 399  * @u: common unicast packet header
 400  * @src: address of the source
 401  * @subtype: packet subtype
 402  * @reserved: reserved byte for alignment
 403  */
 404 struct batadv_unicast_4addr_packet {
 405         struct batadv_unicast_packet u;
 406         u8 src[ETH_ALEN];
 407         u8 subtype;
 408         u8 reserved;
 409         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 410          * following ethernet header again 4 bytes boundary aligned
 411          */
 412 };
 413
 414 /**
 415  * struct batadv_frag_packet - fragmented packet
 416  * @packet_type: batman-adv packet type, part of the general header
 417  * @version: batman-adv protocol version, part of the genereal header
 418  * @ttl: time to live for this packet, part of the genereal header
 419  * @dest: final destination used when routing fragments
 420  * @orig: originator of the fragment used when merging the packet
 421  * @no: fragment number within this sequence
 422  * @reserved: reserved byte for alignment
 423  * @seqno: sequence identification
 424  * @total_size: size of the merged packet
 425  */
 426 struct batadv_frag_packet {
 427         u8     packet_type;
 428         u8     version;  /* batman version field */
 429         u8     ttl;
 430 #if defined(__BIG_ENDIAN_BITFIELD)
 431         u8     no:4;
 432         u8     reserved:4;
 433 #elif defined(__LITTLE_ENDIAN_BITFIELD)
 434         u8     reserved:4;
 435         u8     no:4;
 436 #else
 437 #error "unknown bitfield endianness"
 438 #endif
 439         u8     dest[ETH_ALEN];
 440         u8     orig[ETH_ALEN];
 441         __be16 seqno;
 442         __be16 total_size;
 443 };
 444
 445 /**
 446  * struct batadv_bcast_packet - broadcast packet for network payload
 447  * @packet_type: batman-adv packet type, part of the general header
 448  * @version: batman-adv protocol version, part of the genereal header
 449  * @ttl: time to live for this packet, part of the genereal header
 450  * @reserved: reserved byte for alignment
 451  * @seqno: sequence identification
 452  * @orig: originator of the broadcast packet
 453  */
 454 struct batadv_bcast_packet {
 455         u8     packet_type;
 456         u8     version;  /* batman version field */
 457         u8     ttl;
 458         u8     reserved;
 459         __be32 seqno;
 460         u8     orig[ETH_ALEN];
 461         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 462          * following ethernet header again 4 bytes boundary aligned
 463          */
 464 };
 465
 466 /**
 467  * struct batadv_coded_packet - network coded packet
 468  * @packet_type: batman-adv packet type, part of the general header
 469  * @version: batman-adv protocol version, part of the genereal header
 470  * @ttl: time to live for this packet, part of the genereal header
 471  * @first_source: original source of first included packet
 472  * @first_orig_dest: original destinal of first included packet
 473  * @first_crc: checksum of first included packet
 474  * @first_ttvn: tt-version number of first included packet
 475  * @second_ttl: ttl of second packet
 476  * @second_dest: second receiver of this coded packet
 477  * @second_source: original source of second included packet
 478  * @second_orig_dest: original destination of second included packet
 479  * @second_crc: checksum of second included packet
 480  * @second_ttvn: tt version number of second included packet
 481  * @coded_len: length of network coded part of the payload
 482  */
 483 struct batadv_coded_packet {
 484         u8     packet_type;
 485         u8     version;  /* batman version field */
 486         u8     ttl;
 487         u8     first_ttvn;
 488         /* u8  first_dest[ETH_ALEN]; - saved in mac header destination */
 489         u8     first_source[ETH_ALEN];
 490         u8     first_orig_dest[ETH_ALEN];
 491         __be32 first_crc;
 492         u8     second_ttl;
 493         u8     second_ttvn;
 494         u8     second_dest[ETH_ALEN];
 495         u8     second_source[ETH_ALEN];
 496         u8     second_orig_dest[ETH_ALEN];
 497         __be32 second_crc;
 498         __be16 coded_len;
 499 };
 500
 501 #pragma pack()
 502
 503 /**
 504  * struct batadv_unicast_tvlv - generic unicast packet with tvlv payload
 505  * @packet_type: batman-adv packet type, part of the general header
 506  * @version: batman-adv protocol version, part of the genereal header
 507  * @ttl: time to live for this packet, part of the genereal header
 508  * @reserved: reserved field (for packet alignment)
 509  * @src: address of the source
 510  * @dst: address of the destination
 511  * @tvlv_len: length of tvlv data following the unicast tvlv header
 512  * @align: 2 bytes to align the header to a 4 byte boundary
 513  */
 514 struct batadv_unicast_tvlv_packet {
 515         u8     packet_type;
 516         u8     version;  /* batman version field */
 517         u8     ttl;
 518         u8     reserved;
 519         u8     dst[ETH_ALEN];
 520         u8     src[ETH_ALEN];
 521         __be16 tvlv_len;
 522         u16    align;
 523 };
 524
 525 /**
 526  * struct batadv_tvlv_hdr - base tvlv header struct
 527  * @type: tvlv container type (see batadv_tvlv_type)
 528  * @version: tvlv container version
 529  * @len: tvlv container length
 530  */
 531 struct batadv_tvlv_hdr {
 532         u8     type;
 533         u8     version;
 534         __be16 len;
 535 };
 536
 537 /**
 538  * struct batadv_tvlv_gateway_data - gateway data propagated through gw tvlv
 539  *  container
 540  * @bandwidth_down: advertised uplink download bandwidth
 541  * @bandwidth_up: advertised uplink upload bandwidth
 542  */
 543 struct batadv_tvlv_gateway_data {
 544         __be32 bandwidth_down;
 545         __be32 bandwidth_up;
 546 };
 547
 548 /**
 549  * struct batadv_tvlv_tt_data - tt data propagated through the tt tvlv container
 550  * @flags: translation table flags (see batadv_tt_data_flags)
 551  * @ttvn: translation table version number
 552  * @num_vlan: number of announced VLANs. In the TVLV this struct is followed by
 553  *  one batadv_tvlv_tt_vlan_data object per announced vlan
 554  */
 555 struct batadv_tvlv_tt_data {
 556         u8     flags;
 557         u8     ttvn;
 558         __be16 num_vlan;
 559 };
 560
 561 /**
 562  * struct batadv_tvlv_tt_vlan_data - vlan specific tt data propagated through
 563  *  the tt tvlv container
 564  * @crc: crc32 checksum of the entries belonging to this vlan
 565  * @vid: vlan identifier
 566  * @reserved: unused, useful for alignment purposes
 567  */
 568 struct batadv_tvlv_tt_vlan_data {
 569         __be32 crc;
 570         __be16 vid;
 571         u16    reserved;
 572 };
 573
 574 /**
 575  * struct batadv_tvlv_tt_change - translation table diff data
 576  * @flags: status indicators concerning the non-mesh client (see
 577  *  batadv_tt_client_flags)
 578  * @reserved: reserved field - useful for alignment purposes only
 579  * @addr: mac address of non-mesh client that triggered this tt change
 580  * @vid: VLAN identifier
 581  */
 582 struct batadv_tvlv_tt_change {
 583         u8     flags;
 584         u8     reserved[3];
 585         u8     addr[ETH_ALEN];
 586         __be16 vid;
 587 };
 588
 589 /**
 590  * struct batadv_tvlv_roam_adv - roaming advertisement
 591  * @client: mac address of roaming client
 592  * @vid: VLAN identifier
 593  */
 594 struct batadv_tvlv_roam_adv {
 595         u8     client[ETH_ALEN];
 596         __be16 vid;
 597 };
 598
 599 /**
 600  * struct batadv_tvlv_mcast_data - payload of a multicast tvlv
 601  * @flags: multicast flags announced by the orig node
 602  * @reserved: reserved field
 603  */
 604 struct batadv_tvlv_mcast_data {
 605         u8 flags;
 606         u8 reserved[3];
 607 };
 608
 609 #endif /* _NET_BATMAN_ADV_PACKET_H_ */