net/batman-adv/packet.h

   1 /* Copyright (C) 2007-2017  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  * struct batadv_icmp_header - common members among all the ICMP packets
 256  * @packet_type: batman-adv packet type, part of the general header
 257  * @version: batman-adv protocol version, part of the genereal header
 258  * @ttl: time to live for this packet, part of the genereal header
 259  * @msg_type: ICMP packet type
 260  * @dst: address of the destination node
 261  * @orig: address of the source node
 262  * @uid: local ICMP socket identifier
 263  * @align: not used - useful for alignment purposes only
 264  *
 265  * This structure is used for ICMP packets parsing only and it is never sent
 266  * over the wire. The alignment field at the end is there to ensure that
 267  * members are padded the same way as they are in real packets.
 268  */
 269 struct batadv_icmp_header {
 270         u8 packet_type;
 271         u8 version;
 272         u8 ttl;
 273         u8 msg_type; /* see ICMP message types above */
 274         u8 dst[ETH_ALEN];
 275         u8 orig[ETH_ALEN];
 276         u8 uid;
 277         u8 align[3];
 278 };
 279
 280 /**
 281  * struct batadv_icmp_packet - ICMP packet
 282  * @packet_type: batman-adv packet type, part of the general header
 283  * @version: batman-adv protocol version, part of the genereal header
 284  * @ttl: time to live for this packet, part of the genereal header
 285  * @msg_type: ICMP packet type
 286  * @dst: address of the destination node
 287  * @orig: address of the source node
 288  * @uid: local ICMP socket identifier
 289  * @reserved: not used - useful for alignment
 290  * @seqno: ICMP sequence number
 291  */
 292 struct batadv_icmp_packet {
 293         u8     packet_type;
 294         u8     version;
 295         u8     ttl;
 296         u8     msg_type; /* see ICMP message types above */
 297         u8     dst[ETH_ALEN];
 298         u8     orig[ETH_ALEN];
 299         u8     uid;
 300         u8     reserved;
 301         __be16 seqno;
 302 };
 303
 304 /**
 305  * struct batadv_icmp_tp_packet - ICMP TP Meter packet
 306  * @packet_type: batman-adv packet type, part of the general header
 307  * @version: batman-adv protocol version, part of the genereal header
 308  * @ttl: time to live for this packet, part of the genereal header
 309  * @msg_type: ICMP packet type
 310  * @dst: address of the destination node
 311  * @orig: address of the source node
 312  * @uid: local ICMP socket identifier
 313  * @subtype: TP packet subtype (see batadv_icmp_tp_subtype)
 314  * @session: TP session identifier
 315  * @seqno: the TP sequence number
 316  * @timestamp: time when the packet has been sent. This value is filled in a
 317  *  TP_MSG and echoed back in the next TP_ACK so that the sender can compute the
 318  *  RTT. Since it is read only by the host which wrote it, there is no need to
 319  *  store it using network order
 320  */
 321 struct batadv_icmp_tp_packet {
 322         u8  packet_type;
 323         u8  version;
 324         u8  ttl;
 325         u8  msg_type; /* see ICMP message types above */
 326         u8  dst[ETH_ALEN];
 327         u8  orig[ETH_ALEN];
 328         u8  uid;
 329         u8  subtype;
 330         u8  session[2];
 331         __be32 seqno;
 332         __be32 timestamp;
 333 };
 334
 335 /**
 336  * enum batadv_icmp_tp_subtype - ICMP TP Meter packet subtypes
 337  * @BATADV_TP_MSG: Msg from sender to receiver
 338  * @BATADV_TP_ACK: acknowledgment from receiver to sender
 339  */
 340 enum batadv_icmp_tp_subtype {
 341         BATADV_TP_MSG   = 0,
 342         BATADV_TP_ACK,
 343 };
 344
 345 #define BATADV_RR_LEN 16
 346
 347 /**
 348  * struct batadv_icmp_packet_rr - ICMP RouteRecord packet
 349  * @packet_type: batman-adv packet type, part of the general header
 350  * @version: batman-adv protocol version, part of the genereal header
 351  * @ttl: time to live for this packet, part of the genereal header
 352  * @msg_type: ICMP packet type
 353  * @dst: address of the destination node
 354  * @orig: address of the source node
 355  * @uid: local ICMP socket identifier
 356  * @rr_cur: number of entries the rr array
 357  * @seqno: ICMP sequence number
 358  * @rr: route record array
 359  */
 360 struct batadv_icmp_packet_rr {
 361         u8     packet_type;
 362         u8     version;
 363         u8     ttl;
 364         u8     msg_type; /* see ICMP message types above */
 365         u8     dst[ETH_ALEN];
 366         u8     orig[ETH_ALEN];
 367         u8     uid;
 368         u8     rr_cur;
 369         __be16 seqno;
 370         u8     rr[BATADV_RR_LEN][ETH_ALEN];
 371 };
 372
 373 #define BATADV_ICMP_MAX_PACKET_SIZE     sizeof(struct batadv_icmp_packet_rr)
 374
 375 /* All packet headers in front of an ethernet header have to be completely
 376  * divisible by 2 but not by 4 to make the payload after the ethernet
 377  * header again 4 bytes boundary aligned.
 378  *
 379  * A packing of 2 is necessary to avoid extra padding at the end of the struct
 380  * caused by a structure member which is larger than two bytes. Otherwise
 381  * the structure would not fulfill the previously mentioned rule to avoid the
 382  * misalignment of the payload after the ethernet header. It may also lead to
 383  * leakage of information when the padding it not initialized before sending.
 384  */
 385 #pragma pack(2)
 386
 387 /**
 388  * struct batadv_unicast_packet - unicast packet for network payload
 389  * @packet_type: batman-adv packet type, part of the general header
 390  * @version: batman-adv protocol version, part of the genereal header
 391  * @ttl: time to live for this packet, part of the genereal header
 392  * @ttvn: translation table version number
 393  * @dest: originator destination of the unicast packet
 394  */
 395 struct batadv_unicast_packet {
 396         u8 packet_type;
 397         u8 version;
 398         u8 ttl;
 399         u8 ttvn; /* destination translation table version number */
 400         u8 dest[ETH_ALEN];
 401         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 402          * following ethernet header again 4 bytes boundary aligned
 403          */
 404 };
 405
 406 /**
 407  * struct batadv_unicast_4addr_packet - extended unicast packet
 408  * @u: common unicast packet header
 409  * @src: address of the source
 410  * @subtype: packet subtype
 411  * @reserved: reserved byte for alignment
 412  */
 413 struct batadv_unicast_4addr_packet {
 414         struct batadv_unicast_packet u;
 415         u8 src[ETH_ALEN];
 416         u8 subtype;
 417         u8 reserved;
 418         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 419          * following ethernet header again 4 bytes boundary aligned
 420          */
 421 };
 422
 423 /**
 424  * struct batadv_frag_packet - fragmented packet
 425  * @packet_type: batman-adv packet type, part of the general header
 426  * @version: batman-adv protocol version, part of the genereal header
 427  * @ttl: time to live for this packet, part of the genereal header
 428  * @dest: final destination used when routing fragments
 429  * @orig: originator of the fragment used when merging the packet
 430  * @no: fragment number within this sequence
 431  * @priority: priority of frame, from ToS IP precedence or 802.1p
 432  * @reserved: reserved byte for alignment
 433  * @seqno: sequence identification
 434  * @total_size: size of the merged packet
 435  */
 436 struct batadv_frag_packet {
 437         u8     packet_type;
 438         u8     version;  /* batman version field */
 439         u8     ttl;
 440 #if defined(__BIG_ENDIAN_BITFIELD)
 441         u8     no:4;
 442         u8     priority:3;
 443         u8     reserved:1;
 444 #elif defined(__LITTLE_ENDIAN_BITFIELD)
 445         u8     reserved:1;
 446         u8     priority:3;
 447         u8     no:4;
 448 #else
 449 #error "unknown bitfield endianness"
 450 #endif
 451         u8     dest[ETH_ALEN];
 452         u8     orig[ETH_ALEN];
 453         __be16 seqno;
 454         __be16 total_size;
 455 };
 456
 457 /**
 458  * struct batadv_bcast_packet - broadcast packet for network payload
 459  * @packet_type: batman-adv packet type, part of the general header
 460  * @version: batman-adv protocol version, part of the genereal header
 461  * @ttl: time to live for this packet, part of the genereal header
 462  * @reserved: reserved byte for alignment
 463  * @seqno: sequence identification
 464  * @orig: originator of the broadcast packet
 465  */
 466 struct batadv_bcast_packet {
 467         u8     packet_type;
 468         u8     version;  /* batman version field */
 469         u8     ttl;
 470         u8     reserved;
 471         __be32 seqno;
 472         u8     orig[ETH_ALEN];
 473         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 474          * following ethernet header again 4 bytes boundary aligned
 475          */
 476 };
 477
 478 /**
 479  * struct batadv_coded_packet - network coded packet
 480  * @packet_type: batman-adv packet type, part of the general header
 481  * @version: batman-adv protocol version, part of the genereal header
 482  * @ttl: time to live for this packet, part of the genereal header
 483  * @first_source: original source of first included packet
 484  * @first_orig_dest: original destinal of first included packet
 485  * @first_crc: checksum of first included packet
 486  * @first_ttvn: tt-version number of first included packet
 487  * @second_ttl: ttl of second packet
 488  * @second_dest: second receiver of this coded packet
 489  * @second_source: original source of second included packet
 490  * @second_orig_dest: original destination of second included packet
 491  * @second_crc: checksum of second included packet
 492  * @second_ttvn: tt version number of second included packet
 493  * @coded_len: length of network coded part of the payload
 494  */
 495 struct batadv_coded_packet {
 496         u8     packet_type;
 497         u8     version;  /* batman version field */
 498         u8     ttl;
 499         u8     first_ttvn;
 500         /* u8  first_dest[ETH_ALEN]; - saved in mac header destination */
 501         u8     first_source[ETH_ALEN];
 502         u8     first_orig_dest[ETH_ALEN];
 503         __be32 first_crc;
 504         u8     second_ttl;
 505         u8     second_ttvn;
 506         u8     second_dest[ETH_ALEN];
 507         u8     second_source[ETH_ALEN];
 508         u8     second_orig_dest[ETH_ALEN];
 509         __be32 second_crc;
 510         __be16 coded_len;
 511 };
 512
 513 #pragma pack()
 514
 515 /**
 516  * struct batadv_unicast_tvlv_packet - generic unicast packet with tvlv payload
 517  * @packet_type: batman-adv packet type, part of the general header
 518  * @version: batman-adv protocol version, part of the genereal header
 519  * @ttl: time to live for this packet, part of the genereal header
 520  * @reserved: reserved field (for packet alignment)
 521  * @src: address of the source
 522  * @dst: address of the destination
 523  * @tvlv_len: length of tvlv data following the unicast tvlv header
 524  * @align: 2 bytes to align the header to a 4 byte boundary
 525  */
 526 struct batadv_unicast_tvlv_packet {
 527         u8     packet_type;
 528         u8     version;  /* batman version field */
 529         u8     ttl;
 530         u8     reserved;
 531         u8     dst[ETH_ALEN];
 532         u8     src[ETH_ALEN];
 533         __be16 tvlv_len;
 534         u16    align;
 535 };
 536
 537 /**
 538  * struct batadv_tvlv_hdr - base tvlv header struct
 539  * @type: tvlv container type (see batadv_tvlv_type)
 540  * @version: tvlv container version
 541  * @len: tvlv container length
 542  */
 543 struct batadv_tvlv_hdr {
 544         u8     type;
 545         u8     version;
 546         __be16 len;
 547 };
 548
 549 /**
 550  * struct batadv_tvlv_gateway_data - gateway data propagated through gw tvlv
 551  *  container
 552  * @bandwidth_down: advertised uplink download bandwidth
 553  * @bandwidth_up: advertised uplink upload bandwidth
 554  */
 555 struct batadv_tvlv_gateway_data {
 556         __be32 bandwidth_down;
 557         __be32 bandwidth_up;
 558 };
 559
 560 /**
 561  * struct batadv_tvlv_tt_data - tt data propagated through the tt tvlv container
 562  * @flags: translation table flags (see batadv_tt_data_flags)
 563  * @ttvn: translation table version number
 564  * @num_vlan: number of announced VLANs. In the TVLV this struct is followed by
 565  *  one batadv_tvlv_tt_vlan_data object per announced vlan
 566  */
 567 struct batadv_tvlv_tt_data {
 568         u8     flags;
 569         u8     ttvn;
 570         __be16 num_vlan;
 571 };
 572
 573 /**
 574  * struct batadv_tvlv_tt_vlan_data - vlan specific tt data propagated through
 575  *  the tt tvlv container
 576  * @crc: crc32 checksum of the entries belonging to this vlan
 577  * @vid: vlan identifier
 578  * @reserved: unused, useful for alignment purposes
 579  */
 580 struct batadv_tvlv_tt_vlan_data {
 581         __be32 crc;
 582         __be16 vid;
 583         u16    reserved;
 584 };
 585
 586 /**
 587  * struct batadv_tvlv_tt_change - translation table diff data
 588  * @flags: status indicators concerning the non-mesh client (see
 589  *  batadv_tt_client_flags)
 590  * @reserved: reserved field - useful for alignment purposes only
 591  * @addr: mac address of non-mesh client that triggered this tt change
 592  * @vid: VLAN identifier
 593  */
 594 struct batadv_tvlv_tt_change {
 595         u8     flags;
 596         u8     reserved[3];
 597         u8     addr[ETH_ALEN];
 598         __be16 vid;
 599 };
 600
 601 /**
 602  * struct batadv_tvlv_roam_adv - roaming advertisement
 603  * @client: mac address of roaming client
 604  * @vid: VLAN identifier
 605  */
 606 struct batadv_tvlv_roam_adv {
 607         u8     client[ETH_ALEN];
 608         __be16 vid;
 609 };
 610
 611 /**
 612  * struct batadv_tvlv_mcast_data - payload of a multicast tvlv
 613  * @flags: multicast flags announced by the orig node
 614  * @reserved: reserved field
 615  */
 616 struct batadv_tvlv_mcast_data {
 617         u8 flags;
 618         u8 reserved[3];
 619 };
 620
 621 #endif /* _NET_BATMAN_ADV_PACKET_H_ */