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_tt_client_flags - TT client specific flags
 133  * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table
 134  * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new
 135  *  update telling its new real location has not been received/sent yet
 136  * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface.
 137  *  This information is used by the "AP Isolation" feature
 138  * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This
 139  *  information is used by the Extended Isolation feature
 140  * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table
 141  * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has
 142  *  not been announced yet
 143  * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept
 144  *  in the table for one more originator interval for consistency purposes
 145  * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of
 146  *  the network but no nnode has already announced it
 147  *
 148  * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire.
 149  * Bits from 8 to 15 are called _local flags_ because they are used for local
 150  * computations only.
 151  *
 152  * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with
 153  * the other nodes in the network. To achieve this goal these flags are included
 154  * in the TT CRC computation.
 155  */
 156 enum batadv_tt_client_flags {
 157         BATADV_TT_CLIENT_DEL     = BIT(0),
 158         BATADV_TT_CLIENT_ROAM    = BIT(1),
 159         BATADV_TT_CLIENT_WIFI    = BIT(4),
 160         BATADV_TT_CLIENT_ISOLA   = BIT(5),
 161         BATADV_TT_CLIENT_NOPURGE = BIT(8),
 162         BATADV_TT_CLIENT_NEW     = BIT(9),
 163         BATADV_TT_CLIENT_PENDING = BIT(10),
 164         BATADV_TT_CLIENT_TEMP    = BIT(11),
 165 };
 166
 167 /**
 168  * enum batadv_vlan_flags - flags for the four MSB of any vlan ID field
 169  * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not
 170  */
 171 enum batadv_vlan_flags {
 172         BATADV_VLAN_HAS_TAG     = BIT(15),
 173 };
 174
 175 /* claim frame types for the bridge loop avoidance */
 176 enum batadv_bla_claimframe {
 177         BATADV_CLAIM_TYPE_CLAIM         = 0x00,
 178         BATADV_CLAIM_TYPE_UNCLAIM       = 0x01,
 179         BATADV_CLAIM_TYPE_ANNOUNCE      = 0x02,
 180         BATADV_CLAIM_TYPE_REQUEST       = 0x03,
 181         BATADV_CLAIM_TYPE_LOOPDETECT    = 0x04,
 182 };
 183
 184 /**
 185  * enum batadv_tvlv_type - tvlv type definitions
 186  * @BATADV_TVLV_GW: gateway tvlv
 187  * @BATADV_TVLV_DAT: distributed arp table tvlv
 188  * @BATADV_TVLV_NC: network coding tvlv
 189  * @BATADV_TVLV_TT: translation table tvlv
 190  * @BATADV_TVLV_ROAM: roaming advertisement tvlv
 191  * @BATADV_TVLV_MCAST: multicast capability tvlv
 192  */
 193 enum batadv_tvlv_type {
 194         BATADV_TVLV_GW          = 0x01,
 195         BATADV_TVLV_DAT         = 0x02,
 196         BATADV_TVLV_NC          = 0x03,
 197         BATADV_TVLV_TT          = 0x04,
 198         BATADV_TVLV_ROAM        = 0x05,
 199         BATADV_TVLV_MCAST       = 0x06,
 200 };
 201
 202 #pragma pack(2)
 203 /* the destination hardware field in the ARP frame is used to
 204  * transport the claim type and the group id
 205  */
 206 struct batadv_bla_claim_dst {
 207         u8     magic[3];        /* FF:43:05 */
 208         u8     type;            /* bla_claimframe */
 209         __be16 group;           /* group id */
 210 };
 211
 212 #pragma pack()
 213
 214 /**
 215  * struct batadv_ogm_packet - ogm (routing protocol) packet
 216  * @packet_type: batman-adv packet type, part of the general header
 217  * @version: batman-adv protocol version, part of the genereal header
 218  * @ttl: time to live for this packet, part of the genereal header
 219  * @flags: contains routing relevant flags - see enum batadv_iv_flags
 220  * @seqno: sequence identification
 221  * @orig: address of the source node
 222  * @prev_sender: address of the previous sender
 223  * @reserved: reserved byte for alignment
 224  * @tq: transmission quality
 225  * @tvlv_len: length of tvlv data following the ogm header
 226  */
 227 struct batadv_ogm_packet {
 228         u8     packet_type;
 229         u8     version;
 230         u8     ttl;
 231         u8     flags;
 232         __be32 seqno;
 233         u8     orig[ETH_ALEN];
 234         u8     prev_sender[ETH_ALEN];
 235         u8     reserved;
 236         u8     tq;
 237         __be16 tvlv_len;
 238         /* __packed is not needed as the struct size is divisible by 4,
 239          * and the largest data type in this struct has a size of 4.
 240          */
 241 };
 242
 243 #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
 244
 245 /**
 246  * struct batadv_ogm2_packet - ogm2 (routing protocol) packet
 247  * @packet_type: batman-adv packet type, part of the general header
 248  * @version: batman-adv protocol version, part of the general header
 249  * @ttl: time to live for this packet, part of the general header
 250  * @flags: reseved for routing relevant flags - currently always 0
 251  * @seqno: sequence number
 252  * @orig: originator mac address
 253  * @tvlv_len: length of the appended tvlv buffer (in bytes)
 254  * @throughput: the currently flooded path throughput
 255  */
 256 struct batadv_ogm2_packet {
 257         u8     packet_type;
 258         u8     version;
 259         u8     ttl;
 260         u8     flags;
 261         __be32 seqno;
 262         u8     orig[ETH_ALEN];
 263         __be16 tvlv_len;
 264         __be32 throughput;
 265         /* __packed is not needed as the struct size is divisible by 4,
 266          * and the largest data type in this struct has a size of 4.
 267          */
 268 };
 269
 270 #define BATADV_OGM2_HLEN sizeof(struct batadv_ogm2_packet)
 271
 272 /**
 273  * struct batadv_elp_packet - elp (neighbor discovery) packet
 274  * @packet_type: batman-adv packet type, part of the general header
 275  * @version: batman-adv protocol version, part of the genereal header
 276  * @orig: originator mac address
 277  * @seqno: sequence number
 278  * @elp_interval: currently used ELP sending interval in ms
 279  */
 280 struct batadv_elp_packet {
 281         u8     packet_type;
 282         u8     version;
 283         u8     orig[ETH_ALEN];
 284         __be32 seqno;
 285         __be32 elp_interval;
 286 };
 287
 288 #define BATADV_ELP_HLEN sizeof(struct batadv_elp_packet)
 289
 290 /**
 291  * enum batadv_icmp_user_cmd_type - types for batman-adv icmp cmd modes
 292  * @BATADV_TP_START: start a throughput meter run
 293  * @BATADV_TP_STOP: stop a throughput meter run
 294  */
 295 enum batadv_icmp_user_cmd_type {
 296         BATADV_TP_START         = 0,
 297         BATADV_TP_STOP          = 2,
 298 };
 299
 300 /**
 301  * struct batadv_icmp_header - common members among all the ICMP packets
 302  * @packet_type: batman-adv packet type, part of the general header
 303  * @version: batman-adv protocol version, part of the genereal header
 304  * @ttl: time to live for this packet, part of the genereal header
 305  * @msg_type: ICMP packet type
 306  * @dst: address of the destination node
 307  * @orig: address of the source node
 308  * @uid: local ICMP socket identifier
 309  * @align: not used - useful for alignment purposes only
 310  *
 311  * This structure is used for ICMP packets parsing only and it is never sent
 312  * over the wire. The alignment field at the end is there to ensure that
 313  * members are padded the same way as they are in real packets.
 314  */
 315 struct batadv_icmp_header {
 316         u8 packet_type;
 317         u8 version;
 318         u8 ttl;
 319         u8 msg_type; /* see ICMP message types above */
 320         u8 dst[ETH_ALEN];
 321         u8 orig[ETH_ALEN];
 322         u8 uid;
 323         u8 align[3];
 324 };
 325
 326 /**
 327  * struct batadv_icmp_packet - ICMP packet
 328  * @packet_type: batman-adv packet type, part of the general header
 329  * @version: batman-adv protocol version, part of the genereal header
 330  * @ttl: time to live for this packet, part of the genereal header
 331  * @msg_type: ICMP packet type
 332  * @dst: address of the destination node
 333  * @orig: address of the source node
 334  * @uid: local ICMP socket identifier
 335  * @reserved: not used - useful for alignment
 336  * @seqno: ICMP sequence number
 337  */
 338 struct batadv_icmp_packet {
 339         u8     packet_type;
 340         u8     version;
 341         u8     ttl;
 342         u8     msg_type; /* see ICMP message types above */
 343         u8     dst[ETH_ALEN];
 344         u8     orig[ETH_ALEN];
 345         u8     uid;
 346         u8     reserved;
 347         __be16 seqno;
 348 };
 349
 350 /**
 351  * struct batadv_icmp_tp_packet - ICMP TP Meter packet
 352  * @packet_type: batman-adv packet type, part of the general header
 353  * @version: batman-adv protocol version, part of the genereal header
 354  * @ttl: time to live for this packet, part of the genereal header
 355  * @msg_type: ICMP packet type
 356  * @dst: address of the destination node
 357  * @orig: address of the source node
 358  * @uid: local ICMP socket identifier
 359  * @subtype: TP packet subtype (see batadv_icmp_tp_subtype)
 360  * @session: TP session identifier
 361  * @seqno: the TP sequence number
 362  * @timestamp: time when the packet has been sent. This value is filled in a
 363  *  TP_MSG and echoed back in the next TP_ACK so that the sender can compute the
 364  *  RTT. Since it is read only by the host which wrote it, there is no need to
 365  *  store it using network order
 366  */
 367 struct batadv_icmp_tp_packet {
 368         u8  packet_type;
 369         u8  version;
 370         u8  ttl;
 371         u8  msg_type; /* see ICMP message types above */
 372         u8  dst[ETH_ALEN];
 373         u8  orig[ETH_ALEN];
 374         u8  uid;
 375         u8  subtype;
 376         u8  session[2];
 377         __be32 seqno;
 378         __be32 timestamp;
 379 };
 380
 381 /**
 382  * enum batadv_icmp_tp_subtype - ICMP TP Meter packet subtypes
 383  * @BATADV_TP_MSG: Msg from sender to receiver
 384  * @BATADV_TP_ACK: acknowledgment from receiver to sender
 385  */
 386 enum batadv_icmp_tp_subtype {
 387         BATADV_TP_MSG   = 0,
 388         BATADV_TP_ACK,
 389 };
 390
 391 #define BATADV_RR_LEN 16
 392
 393 /**
 394  * struct batadv_icmp_packet_rr - ICMP RouteRecord packet
 395  * @packet_type: batman-adv packet type, part of the general header
 396  * @version: batman-adv protocol version, part of the genereal header
 397  * @ttl: time to live for this packet, part of the genereal header
 398  * @msg_type: ICMP packet type
 399  * @dst: address of the destination node
 400  * @orig: address of the source node
 401  * @uid: local ICMP socket identifier
 402  * @rr_cur: number of entries the rr array
 403  * @seqno: ICMP sequence number
 404  * @rr: route record array
 405  */
 406 struct batadv_icmp_packet_rr {
 407         u8     packet_type;
 408         u8     version;
 409         u8     ttl;
 410         u8     msg_type; /* see ICMP message types above */
 411         u8     dst[ETH_ALEN];
 412         u8     orig[ETH_ALEN];
 413         u8     uid;
 414         u8     rr_cur;
 415         __be16 seqno;
 416         u8     rr[BATADV_RR_LEN][ETH_ALEN];
 417 };
 418
 419 #define BATADV_ICMP_MAX_PACKET_SIZE     sizeof(struct batadv_icmp_packet_rr)
 420
 421 /* All packet headers in front of an ethernet header have to be completely
 422  * divisible by 2 but not by 4 to make the payload after the ethernet
 423  * header again 4 bytes boundary aligned.
 424  *
 425  * A packing of 2 is necessary to avoid extra padding at the end of the struct
 426  * caused by a structure member which is larger than two bytes. Otherwise
 427  * the structure would not fulfill the previously mentioned rule to avoid the
 428  * misalignment of the payload after the ethernet header. It may also lead to
 429  * leakage of information when the padding it not initialized before sending.
 430  */
 431 #pragma pack(2)
 432
 433 /**
 434  * struct batadv_unicast_packet - unicast packet for network payload
 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  * @ttvn: translation table version number
 439  * @dest: originator destination of the unicast packet
 440  */
 441 struct batadv_unicast_packet {
 442         u8 packet_type;
 443         u8 version;
 444         u8 ttl;
 445         u8 ttvn; /* destination translation table version number */
 446         u8 dest[ETH_ALEN];
 447         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 448          * following ethernet header again 4 bytes boundary aligned
 449          */
 450 };
 451
 452 /**
 453  * struct batadv_unicast_4addr_packet - extended unicast packet
 454  * @u: common unicast packet header
 455  * @src: address of the source
 456  * @subtype: packet subtype
 457  * @reserved: reserved byte for alignment
 458  */
 459 struct batadv_unicast_4addr_packet {
 460         struct batadv_unicast_packet u;
 461         u8 src[ETH_ALEN];
 462         u8 subtype;
 463         u8 reserved;
 464         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 465          * following ethernet header again 4 bytes boundary aligned
 466          */
 467 };
 468
 469 /**
 470  * struct batadv_frag_packet - fragmented packet
 471  * @packet_type: batman-adv packet type, part of the general header
 472  * @version: batman-adv protocol version, part of the genereal header
 473  * @ttl: time to live for this packet, part of the genereal header
 474  * @dest: final destination used when routing fragments
 475  * @orig: originator of the fragment used when merging the packet
 476  * @no: fragment number within this sequence
 477  * @priority: priority of frame, from ToS IP precedence or 802.1p
 478  * @reserved: reserved byte for alignment
 479  * @seqno: sequence identification
 480  * @total_size: size of the merged packet
 481  */
 482 struct batadv_frag_packet {
 483         u8     packet_type;
 484         u8     version;  /* batman version field */
 485         u8     ttl;
 486 #if defined(__BIG_ENDIAN_BITFIELD)
 487         u8     no:4;
 488         u8     priority:3;
 489         u8     reserved:1;
 490 #elif defined(__LITTLE_ENDIAN_BITFIELD)
 491         u8     reserved:1;
 492         u8     priority:3;
 493         u8     no:4;
 494 #else
 495 #error "unknown bitfield endianness"
 496 #endif
 497         u8     dest[ETH_ALEN];
 498         u8     orig[ETH_ALEN];
 499         __be16 seqno;
 500         __be16 total_size;
 501 };
 502
 503 /**
 504  * struct batadv_bcast_packet - broadcast packet for network 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 byte for alignment
 509  * @seqno: sequence identification
 510  * @orig: originator of the broadcast packet
 511  */
 512 struct batadv_bcast_packet {
 513         u8     packet_type;
 514         u8     version;  /* batman version field */
 515         u8     ttl;
 516         u8     reserved;
 517         __be32 seqno;
 518         u8     orig[ETH_ALEN];
 519         /* "4 bytes boundary + 2 bytes" long to make the payload after the
 520          * following ethernet header again 4 bytes boundary aligned
 521          */
 522 };
 523
 524 /**
 525  * struct batadv_coded_packet - network coded packet
 526  * @packet_type: batman-adv packet type, part of the general header
 527  * @version: batman-adv protocol version, part of the genereal header
 528  * @ttl: time to live for this packet, part of the genereal header
 529  * @first_source: original source of first included packet
 530  * @first_orig_dest: original destinal of first included packet
 531  * @first_crc: checksum of first included packet
 532  * @first_ttvn: tt-version number of first included packet
 533  * @second_ttl: ttl of second packet
 534  * @second_dest: second receiver of this coded packet
 535  * @second_source: original source of second included packet
 536  * @second_orig_dest: original destination of second included packet
 537  * @second_crc: checksum of second included packet
 538  * @second_ttvn: tt version number of second included packet
 539  * @coded_len: length of network coded part of the payload
 540  */
 541 struct batadv_coded_packet {
 542         u8     packet_type;
 543         u8     version;  /* batman version field */
 544         u8     ttl;
 545         u8     first_ttvn;
 546         /* u8  first_dest[ETH_ALEN]; - saved in mac header destination */
 547         u8     first_source[ETH_ALEN];
 548         u8     first_orig_dest[ETH_ALEN];
 549         __be32 first_crc;
 550         u8     second_ttl;
 551         u8     second_ttvn;
 552         u8     second_dest[ETH_ALEN];
 553         u8     second_source[ETH_ALEN];
 554         u8     second_orig_dest[ETH_ALEN];
 555         __be32 second_crc;
 556         __be16 coded_len;
 557 };
 558
 559 #pragma pack()
 560
 561 /**
 562  * struct batadv_unicast_tvlv_packet - generic unicast packet with tvlv payload
 563  * @packet_type: batman-adv packet type, part of the general header
 564  * @version: batman-adv protocol version, part of the genereal header
 565  * @ttl: time to live for this packet, part of the genereal header
 566  * @reserved: reserved field (for packet alignment)
 567  * @src: address of the source
 568  * @dst: address of the destination
 569  * @tvlv_len: length of tvlv data following the unicast tvlv header
 570  * @align: 2 bytes to align the header to a 4 byte boundary
 571  */
 572 struct batadv_unicast_tvlv_packet {
 573         u8     packet_type;
 574         u8     version;  /* batman version field */
 575         u8     ttl;
 576         u8     reserved;
 577         u8     dst[ETH_ALEN];
 578         u8     src[ETH_ALEN];
 579         __be16 tvlv_len;
 580         u16    align;
 581 };
 582
 583 /**
 584  * struct batadv_tvlv_hdr - base tvlv header struct
 585  * @type: tvlv container type (see batadv_tvlv_type)
 586  * @version: tvlv container version
 587  * @len: tvlv container length
 588  */
 589 struct batadv_tvlv_hdr {
 590         u8     type;
 591         u8     version;
 592         __be16 len;
 593 };
 594
 595 /**
 596  * struct batadv_tvlv_gateway_data - gateway data propagated through gw tvlv
 597  *  container
 598  * @bandwidth_down: advertised uplink download bandwidth
 599  * @bandwidth_up: advertised uplink upload bandwidth
 600  */
 601 struct batadv_tvlv_gateway_data {
 602         __be32 bandwidth_down;
 603         __be32 bandwidth_up;
 604 };
 605
 606 /**
 607  * struct batadv_tvlv_tt_data - tt data propagated through the tt tvlv container
 608  * @flags: translation table flags (see batadv_tt_data_flags)
 609  * @ttvn: translation table version number
 610  * @num_vlan: number of announced VLANs. In the TVLV this struct is followed by
 611  *  one batadv_tvlv_tt_vlan_data object per announced vlan
 612  */
 613 struct batadv_tvlv_tt_data {
 614         u8     flags;
 615         u8     ttvn;
 616         __be16 num_vlan;
 617 };
 618
 619 /**
 620  * struct batadv_tvlv_tt_vlan_data - vlan specific tt data propagated through
 621  *  the tt tvlv container
 622  * @crc: crc32 checksum of the entries belonging to this vlan
 623  * @vid: vlan identifier
 624  * @reserved: unused, useful for alignment purposes
 625  */
 626 struct batadv_tvlv_tt_vlan_data {
 627         __be32 crc;
 628         __be16 vid;
 629         u16    reserved;
 630 };
 631
 632 /**
 633  * struct batadv_tvlv_tt_change - translation table diff data
 634  * @flags: status indicators concerning the non-mesh client (see
 635  *  batadv_tt_client_flags)
 636  * @reserved: reserved field - useful for alignment purposes only
 637  * @addr: mac address of non-mesh client that triggered this tt change
 638  * @vid: VLAN identifier
 639  */
 640 struct batadv_tvlv_tt_change {
 641         u8     flags;
 642         u8     reserved[3];
 643         u8     addr[ETH_ALEN];
 644         __be16 vid;
 645 };
 646
 647 /**
 648  * struct batadv_tvlv_roam_adv - roaming advertisement
 649  * @client: mac address of roaming client
 650  * @vid: VLAN identifier
 651  */
 652 struct batadv_tvlv_roam_adv {
 653         u8     client[ETH_ALEN];
 654         __be16 vid;
 655 };
 656
 657 /**
 658  * struct batadv_tvlv_mcast_data - payload of a multicast tvlv
 659  * @flags: multicast flags announced by the orig node
 660  * @reserved: reserved field
 661  */
 662 struct batadv_tvlv_mcast_data {
 663         u8 flags;
 664         u8 reserved[3];
 665 };
 666
 667 #endif /* _NET_BATMAN_ADV_PACKET_H_ */