1 /* Copyright (C) 2007-2013 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, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 17 * 02110-1301, USA 18 */ 19 20 #ifndef _NET_BATMAN_ADV_TYPES_H_ 21 #define _NET_BATMAN_ADV_TYPES_H_ 22 23 #include "packet.h" 24 #include "bitarray.h" 25 #include <linux/kernel.h> 26 27 #ifdef CONFIG_BATMAN_ADV_DAT 28 29 /* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed, 30 * BATADV_DAT_ADDR_MAX is changed as well. 31 * 32 * *Please be careful: batadv_dat_addr_t must be UNSIGNED* 33 */ 34 #define batadv_dat_addr_t uint16_t 35 36 #endif /* CONFIG_BATMAN_ADV_DAT */ 37 38 /** 39 * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the 40 * wire only 41 */ 42 #define BATADV_TT_REMOTE_MASK 0x00FF 43 44 /** 45 * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync 46 * among the nodes. These flags are used to compute the global/local CRC 47 */ 48 #define BATADV_TT_SYNC_MASK 0x00F0 49 50 /** 51 * struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data 52 * @ogm_buff: buffer holding the OGM packet 53 * @ogm_buff_len: length of the OGM packet buffer 54 * @ogm_seqno: OGM sequence number - used to identify each OGM 55 */ 56 struct batadv_hard_iface_bat_iv { 57 unsigned char *ogm_buff; 58 int ogm_buff_len; 59 atomic_t ogm_seqno; 60 }; 61 62 /** 63 * struct batadv_hard_iface - network device known to batman-adv 64 * @list: list node for batadv_hardif_list 65 * @if_num: identificator of the interface 66 * @if_status: status of the interface for batman-adv 67 * @net_dev: pointer to the net_device 68 * @num_bcasts: number of payload re-broadcasts on this interface (ARQ) 69 * @hardif_obj: kobject of the per interface sysfs "mesh" directory 70 * @refcount: number of contexts the object is used 71 * @batman_adv_ptype: packet type describing packets that should be processed by 72 * batman-adv for this interface 73 * @soft_iface: the batman-adv interface which uses this network interface 74 * @rcu: struct used for freeing in an RCU-safe manner 75 * @bat_iv: BATMAN IV specific per hard interface data 76 * @cleanup_work: work queue callback item for hard interface deinit 77 */ 78 struct batadv_hard_iface { 79 struct list_head list; 80 int16_t if_num; 81 char if_status; 82 struct net_device *net_dev; 83 uint8_t num_bcasts; 84 struct kobject *hardif_obj; 85 atomic_t refcount; 86 struct packet_type batman_adv_ptype; 87 struct net_device *soft_iface; 88 struct rcu_head rcu; 89 struct batadv_hard_iface_bat_iv bat_iv; 90 struct work_struct cleanup_work; 91 }; 92 93 /** 94 * struct batadv_frag_table_entry - head in the fragment buffer table 95 * @head: head of list with fragments 96 * @lock: lock to protect the list of fragments 97 * @timestamp: time (jiffie) of last received fragment 98 * @seqno: sequence number of the fragments in the list 99 * @size: accumulated size of packets in list 100 */ 101 struct batadv_frag_table_entry { 102 struct hlist_head head; 103 spinlock_t lock; /* protects head */ 104 unsigned long timestamp; 105 uint16_t seqno; 106 uint16_t size; 107 }; 108 109 /** 110 * struct batadv_frag_list_entry - entry in a list of fragments 111 * @list: list node information 112 * @skb: fragment 113 * @no: fragment number in the set 114 */ 115 struct batadv_frag_list_entry { 116 struct hlist_node list; 117 struct sk_buff *skb; 118 uint8_t no; 119 }; 120 121 /** 122 * struct batadv_vlan_tt - VLAN specific TT attributes 123 * @crc: CRC32 checksum of the entries belonging to this vlan 124 * @num_entries: number of TT entries for this VLAN 125 */ 126 struct batadv_vlan_tt { 127 uint32_t crc; 128 atomic_t num_entries; 129 }; 130 131 /** 132 * batadv_orig_node_vlan - VLAN specific data per orig_node 133 * @vid: the VLAN identifier 134 * @tt: VLAN specific TT attributes 135 * @list: list node for orig_node::vlan_list 136 * @refcount: number of context where this object is currently in use 137 * @rcu: struct used for freeing in a RCU-safe manner 138 */ 139 struct batadv_orig_node_vlan { 140 unsigned short vid; 141 struct batadv_vlan_tt tt; 142 struct list_head list; 143 atomic_t refcount; 144 struct rcu_head rcu; 145 }; 146 147 /** 148 * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members 149 * @bcast_own: bitfield containing the number of our OGMs this orig_node 150 * rebroadcasted "back" to us (relative to last_real_seqno) 151 * @bcast_own_sum: counted result of bcast_own 152 * @ogm_cnt_lock: lock protecting bcast_own, bcast_own_sum, 153 * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count 154 */ 155 struct batadv_orig_bat_iv { 156 unsigned long *bcast_own; 157 uint8_t *bcast_own_sum; 158 /* ogm_cnt_lock protects: bcast_own, bcast_own_sum, 159 * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count 160 */ 161 spinlock_t ogm_cnt_lock; 162 }; 163 164 /** 165 * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh 166 * @orig: originator ethernet address 167 * @primary_addr: hosts primary interface address 168 * @router: router that should be used to reach this originator 169 * @batadv_dat_addr_t: address of the orig node in the distributed hash 170 * @last_seen: time when last packet from this node was received 171 * @bcast_seqno_reset: time when the broadcast seqno window was reset 172 * @batman_seqno_reset: time when the batman seqno window was reset 173 * @capabilities: announced capabilities of this originator 174 * @last_ttvn: last seen translation table version number 175 * @tt_buff: last tt changeset this node received from the orig node 176 * @tt_buff_len: length of the last tt changeset this node received from the 177 * orig node 178 * @tt_buff_lock: lock that protects tt_buff and tt_buff_len 179 * @tt_initialised: bool keeping track of whether or not this node have received 180 * any translation table information from the orig node yet 181 * @tt_lock: prevents from updating the table while reading it. Table update is 182 * made up by two operations (data structure update and metdata -CRC/TTVN- 183 * recalculation) and they have to be executed atomically in order to avoid 184 * another thread to read the table/metadata between those. 185 * @last_real_seqno: last and best known sequence number 186 * @last_ttl: ttl of last received packet 187 * @bcast_bits: bitfield containing the info which payload broadcast originated 188 * from this orig node this host already has seen (relative to 189 * last_bcast_seqno) 190 * @last_bcast_seqno: last broadcast sequence number received by this host 191 * @neigh_list: list of potential next hop neighbor towards this orig node 192 * @neigh_list_lock: lock protecting neigh_list, router and bonding_list 193 * @hash_entry: hlist node for batadv_priv::orig_hash 194 * @bat_priv: pointer to soft_iface this orig node belongs to 195 * @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno 196 * @bond_candidates: how many candidates are available 197 * @bond_list: list of bonding candidates 198 * @refcount: number of contexts the object is used 199 * @rcu: struct used for freeing in an RCU-safe manner 200 * @in_coding_list: list of nodes this orig can hear 201 * @out_coding_list: list of nodes that can hear this orig 202 * @in_coding_list_lock: protects in_coding_list 203 * @out_coding_list_lock: protects out_coding_list 204 * @fragments: array with heads for fragment chains 205 * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by the 206 * originator represented by this object 207 * @vlan_list_lock: lock protecting vlan_list 208 * @bat_iv: B.A.T.M.A.N. IV private structure 209 */ 210 struct batadv_orig_node { 211 uint8_t orig[ETH_ALEN]; 212 uint8_t primary_addr[ETH_ALEN]; 213 struct batadv_neigh_node __rcu *router; /* rcu protected pointer */ 214 #ifdef CONFIG_BATMAN_ADV_DAT 215 batadv_dat_addr_t dat_addr; 216 #endif 217 unsigned long last_seen; 218 unsigned long bcast_seqno_reset; 219 unsigned long batman_seqno_reset; 220 uint8_t capabilities; 221 atomic_t last_ttvn; 222 unsigned char *tt_buff; 223 int16_t tt_buff_len; 224 spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */ 225 bool tt_initialised; 226 /* prevents from changing the table while reading it */ 227 spinlock_t tt_lock; 228 uint32_t last_real_seqno; 229 uint8_t last_ttl; 230 DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); 231 uint32_t last_bcast_seqno; 232 struct hlist_head neigh_list; 233 /* neigh_list_lock protects: neigh_list, router & bonding_list */ 234 spinlock_t neigh_list_lock; 235 struct hlist_node hash_entry; 236 struct batadv_priv *bat_priv; 237 /* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */ 238 spinlock_t bcast_seqno_lock; 239 atomic_t bond_candidates; 240 struct list_head bond_list; 241 atomic_t refcount; 242 struct rcu_head rcu; 243 #ifdef CONFIG_BATMAN_ADV_NC 244 struct list_head in_coding_list; 245 struct list_head out_coding_list; 246 spinlock_t in_coding_list_lock; /* Protects in_coding_list */ 247 spinlock_t out_coding_list_lock; /* Protects out_coding_list */ 248 #endif 249 struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT]; 250 struct list_head vlan_list; 251 spinlock_t vlan_list_lock; /* protects vlan_list */ 252 struct batadv_orig_bat_iv bat_iv; 253 }; 254 255 /** 256 * enum batadv_orig_capabilities - orig node capabilities 257 * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled 258 * @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled 259 */ 260 enum batadv_orig_capabilities { 261 BATADV_ORIG_CAPA_HAS_DAT = BIT(0), 262 BATADV_ORIG_CAPA_HAS_NC = BIT(1), 263 }; 264 265 /** 266 * struct batadv_gw_node - structure for orig nodes announcing gw capabilities 267 * @list: list node for batadv_priv_gw::list 268 * @orig_node: pointer to corresponding orig node 269 * @bandwidth_down: advertised uplink download bandwidth 270 * @bandwidth_up: advertised uplink upload bandwidth 271 * @deleted: this struct is scheduled for deletion 272 * @refcount: number of contexts the object is used 273 * @rcu: struct used for freeing in an RCU-safe manner 274 */ 275 struct batadv_gw_node { 276 struct hlist_node list; 277 struct batadv_orig_node *orig_node; 278 uint32_t bandwidth_down; 279 uint32_t bandwidth_up; 280 unsigned long deleted; 281 atomic_t refcount; 282 struct rcu_head rcu; 283 }; 284 285 /** 286 * struct batadv_neigh_bat_iv - B.A.T.M.A.N. IV specific structure for single 287 * hop neighbors 288 * @tq_recv: ring buffer of received TQ values from this neigh node 289 * @tq_index: ring buffer index 290 * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv) 291 * @real_bits: bitfield containing the number of OGMs received from this neigh 292 * node (relative to orig_node->last_real_seqno) 293 * @real_packet_count: counted result of real_bits 294 * @lq_update_lock: lock protecting tq_recv & tq_index 295 */ 296 struct batadv_neigh_bat_iv { 297 uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE]; 298 uint8_t tq_index; 299 uint8_t tq_avg; 300 DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); 301 uint8_t real_packet_count; 302 spinlock_t lq_update_lock; /* protects tq_recv & tq_index */ 303 }; 304 305 /** 306 * struct batadv_neigh_node - structure for single hops neighbors 307 * @list: list node for batadv_orig_node::neigh_list 308 * @orig_node: pointer to corresponding orig_node 309 * @addr: the MAC address of the neighboring interface 310 * @if_incoming: pointer to incoming hard interface 311 * @last_seen: when last packet via this neighbor was received 312 * @last_ttl: last received ttl from this neigh node 313 * @bonding_list: list node for batadv_orig_node::bond_list 314 * @refcount: number of contexts the object is used 315 * @rcu: struct used for freeing in an RCU-safe manner 316 * @bat_iv: B.A.T.M.A.N. IV private structure 317 */ 318 struct batadv_neigh_node { 319 struct hlist_node list; 320 struct batadv_orig_node *orig_node; 321 uint8_t addr[ETH_ALEN]; 322 struct batadv_hard_iface *if_incoming; 323 unsigned long last_seen; 324 uint8_t last_ttl; 325 struct list_head bonding_list; 326 atomic_t refcount; 327 struct rcu_head rcu; 328 struct batadv_neigh_bat_iv bat_iv; 329 }; 330 331 /** 332 * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression 333 * @orig[ETH_ALEN]: mac address of orig node orginating the broadcast 334 * @crc: crc32 checksum of broadcast payload 335 * @entrytime: time when the broadcast packet was received 336 */ 337 #ifdef CONFIG_BATMAN_ADV_BLA 338 struct batadv_bcast_duplist_entry { 339 uint8_t orig[ETH_ALEN]; 340 __be32 crc; 341 unsigned long entrytime; 342 }; 343 #endif 344 345 /** 346 * enum batadv_counters - indices for traffic counters 347 * @BATADV_CNT_TX: transmitted payload traffic packet counter 348 * @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter 349 * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet counter 350 * @BATADV_CNT_RX: received payload traffic packet counter 351 * @BATADV_CNT_RX_BYTES: received payload traffic bytes counter 352 * @BATADV_CNT_FORWARD: forwarded payload traffic packet counter 353 * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter 354 * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet counter 355 * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes counter 356 * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter 357 * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes counter 358 * @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter 359 * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter 360 * @BATADV_CNT_FRAG_RX: received fragment traffic packet counter 361 * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter 362 * @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter 363 * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter 364 * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter 365 * @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter 366 * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet counter 367 * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter 368 * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet counter 369 * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter 370 * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter 371 * @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter 372 * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter 373 * @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter 374 * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic packet 375 * counter 376 * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter 377 * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes counter 378 * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet counter 379 * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes counter 380 * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc decoding 381 * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter 382 * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes counter 383 * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic packet 384 * counter 385 * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in promisc 386 * mode. 387 * @BATADV_CNT_NUM: number of traffic counters 388 */ 389 enum batadv_counters { 390 BATADV_CNT_TX, 391 BATADV_CNT_TX_BYTES, 392 BATADV_CNT_TX_DROPPED, 393 BATADV_CNT_RX, 394 BATADV_CNT_RX_BYTES, 395 BATADV_CNT_FORWARD, 396 BATADV_CNT_FORWARD_BYTES, 397 BATADV_CNT_MGMT_TX, 398 BATADV_CNT_MGMT_TX_BYTES, 399 BATADV_CNT_MGMT_RX, 400 BATADV_CNT_MGMT_RX_BYTES, 401 BATADV_CNT_FRAG_TX, 402 BATADV_CNT_FRAG_TX_BYTES, 403 BATADV_CNT_FRAG_RX, 404 BATADV_CNT_FRAG_RX_BYTES, 405 BATADV_CNT_FRAG_FWD, 406 BATADV_CNT_FRAG_FWD_BYTES, 407 BATADV_CNT_TT_REQUEST_TX, 408 BATADV_CNT_TT_REQUEST_RX, 409 BATADV_CNT_TT_RESPONSE_TX, 410 BATADV_CNT_TT_RESPONSE_RX, 411 BATADV_CNT_TT_ROAM_ADV_TX, 412 BATADV_CNT_TT_ROAM_ADV_RX, 413 #ifdef CONFIG_BATMAN_ADV_DAT 414 BATADV_CNT_DAT_GET_TX, 415 BATADV_CNT_DAT_GET_RX, 416 BATADV_CNT_DAT_PUT_TX, 417 BATADV_CNT_DAT_PUT_RX, 418 BATADV_CNT_DAT_CACHED_REPLY_TX, 419 #endif 420 #ifdef CONFIG_BATMAN_ADV_NC 421 BATADV_CNT_NC_CODE, 422 BATADV_CNT_NC_CODE_BYTES, 423 BATADV_CNT_NC_RECODE, 424 BATADV_CNT_NC_RECODE_BYTES, 425 BATADV_CNT_NC_BUFFER, 426 BATADV_CNT_NC_DECODE, 427 BATADV_CNT_NC_DECODE_BYTES, 428 BATADV_CNT_NC_DECODE_FAILED, 429 BATADV_CNT_NC_SNIFFED, 430 #endif 431 BATADV_CNT_NUM, 432 }; 433 434 /** 435 * struct batadv_priv_tt - per mesh interface translation table data 436 * @vn: translation table version number 437 * @ogm_append_cnt: counter of number of OGMs containing the local tt diff 438 * @local_changes: changes registered in an originator interval 439 * @changes_list: tracks tt local changes within an originator interval 440 * @local_hash: local translation table hash table 441 * @global_hash: global translation table hash table 442 * @req_list: list of pending & unanswered tt_requests 443 * @roam_list: list of the last roaming events of each client limiting the 444 * number of roaming events to avoid route flapping 445 * @changes_list_lock: lock protecting changes_list 446 * @req_list_lock: lock protecting req_list 447 * @roam_list_lock: lock protecting roam_list 448 * @last_changeset: last tt changeset this host has generated 449 * @last_changeset_len: length of last tt changeset this host has generated 450 * @last_changeset_lock: lock protecting last_changeset & last_changeset_len 451 * @commit_lock: prevents from executing a local TT commit while reading the 452 * local table. The local TT commit is made up by two operations (data 453 * structure update and metdata -CRC/TTVN- recalculation) and they have to be 454 * executed atomically in order to avoid another thread to read the 455 * table/metadata between those. 456 * @work: work queue callback item for translation table purging 457 */ 458 struct batadv_priv_tt { 459 atomic_t vn; 460 atomic_t ogm_append_cnt; 461 atomic_t local_changes; 462 struct list_head changes_list; 463 struct batadv_hashtable *local_hash; 464 struct batadv_hashtable *global_hash; 465 struct list_head req_list; 466 struct list_head roam_list; 467 spinlock_t changes_list_lock; /* protects changes */ 468 spinlock_t req_list_lock; /* protects req_list */ 469 spinlock_t roam_list_lock; /* protects roam_list */ 470 unsigned char *last_changeset; 471 int16_t last_changeset_len; 472 /* protects last_changeset & last_changeset_len */ 473 spinlock_t last_changeset_lock; 474 /* prevents from executing a commit while reading the table */ 475 spinlock_t commit_lock; 476 struct delayed_work work; 477 }; 478 479 /** 480 * struct batadv_priv_bla - per mesh interface bridge loope avoidance data 481 * @num_requests; number of bla requests in flight 482 * @claim_hash: hash table containing mesh nodes this host has claimed 483 * @backbone_hash: hash table containing all detected backbone gateways 484 * @bcast_duplist: recently received broadcast packets array (for broadcast 485 * duplicate suppression) 486 * @bcast_duplist_curr: index of last broadcast packet added to bcast_duplist 487 * @bcast_duplist_lock: lock protecting bcast_duplist & bcast_duplist_curr 488 * @claim_dest: local claim data (e.g. claim group) 489 * @work: work queue callback item for cleanups & bla announcements 490 */ 491 #ifdef CONFIG_BATMAN_ADV_BLA 492 struct batadv_priv_bla { 493 atomic_t num_requests; 494 struct batadv_hashtable *claim_hash; 495 struct batadv_hashtable *backbone_hash; 496 struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE]; 497 int bcast_duplist_curr; 498 /* protects bcast_duplist & bcast_duplist_curr */ 499 spinlock_t bcast_duplist_lock; 500 struct batadv_bla_claim_dst claim_dest; 501 struct delayed_work work; 502 }; 503 #endif 504 505 /** 506 * struct batadv_debug_log - debug logging data 507 * @log_buff: buffer holding the logs (ring bufer) 508 * @log_start: index of next character to read 509 * @log_end: index of next character to write 510 * @lock: lock protecting log_buff, log_start & log_end 511 * @queue_wait: log reader's wait queue 512 */ 513 #ifdef CONFIG_BATMAN_ADV_DEBUG 514 struct batadv_priv_debug_log { 515 char log_buff[BATADV_LOG_BUF_LEN]; 516 unsigned long log_start; 517 unsigned long log_end; 518 spinlock_t lock; /* protects log_buff, log_start and log_end */ 519 wait_queue_head_t queue_wait; 520 }; 521 #endif 522 523 /** 524 * struct batadv_priv_gw - per mesh interface gateway data 525 * @list: list of available gateway nodes 526 * @list_lock: lock protecting gw_list & curr_gw 527 * @curr_gw: pointer to currently selected gateway node 528 * @bandwidth_down: advertised uplink download bandwidth (if gw_mode server) 529 * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server) 530 * @reselect: bool indicating a gateway re-selection is in progress 531 */ 532 struct batadv_priv_gw { 533 struct hlist_head list; 534 spinlock_t list_lock; /* protects gw_list & curr_gw */ 535 struct batadv_gw_node __rcu *curr_gw; /* rcu protected pointer */ 536 atomic_t bandwidth_down; 537 atomic_t bandwidth_up; 538 atomic_t reselect; 539 }; 540 541 /** 542 * struct batadv_priv_tvlv - per mesh interface tvlv data 543 * @container_list: list of registered tvlv containers to be sent with each OGM 544 * @handler_list: list of the various tvlv content handlers 545 * @container_list_lock: protects tvlv container list access 546 * @handler_list_lock: protects handler list access 547 */ 548 struct batadv_priv_tvlv { 549 struct hlist_head container_list; 550 struct hlist_head handler_list; 551 spinlock_t container_list_lock; /* protects container_list */ 552 spinlock_t handler_list_lock; /* protects handler_list */ 553 }; 554 555 /** 556 * struct batadv_priv_dat - per mesh interface DAT private data 557 * @addr: node DAT address 558 * @hash: hashtable representing the local ARP cache 559 * @work: work queue callback item for cache purging 560 */ 561 #ifdef CONFIG_BATMAN_ADV_DAT 562 struct batadv_priv_dat { 563 batadv_dat_addr_t addr; 564 struct batadv_hashtable *hash; 565 struct delayed_work work; 566 }; 567 #endif 568 569 /** 570 * struct batadv_priv_nc - per mesh interface network coding private data 571 * @work: work queue callback item for cleanup 572 * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs 573 * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq 574 * @max_fwd_delay: maximum packet forward delay to allow coding of packets 575 * @max_buffer_time: buffer time for sniffed packets used to decoding 576 * @timestamp_fwd_flush: timestamp of last forward packet queue flush 577 * @timestamp_sniffed_purge: timestamp of last sniffed packet queue purge 578 * @coding_hash: Hash table used to buffer skbs while waiting for another 579 * incoming skb to code it with. Skbs are added to the buffer just before being 580 * forwarded in routing.c 581 * @decoding_hash: Hash table used to buffer skbs that might be needed to decode 582 * a received coded skb. The buffer is used for 1) skbs arriving on the 583 * soft-interface; 2) skbs overheard on the hard-interface; and 3) skbs 584 * forwarded by batman-adv. 585 */ 586 struct batadv_priv_nc { 587 struct delayed_work work; 588 struct dentry *debug_dir; 589 u8 min_tq; 590 u32 max_fwd_delay; 591 u32 max_buffer_time; 592 unsigned long timestamp_fwd_flush; 593 unsigned long timestamp_sniffed_purge; 594 struct batadv_hashtable *coding_hash; 595 struct batadv_hashtable *decoding_hash; 596 }; 597 598 /** 599 * struct batadv_softif_vlan - per VLAN attributes set 600 * @vid: VLAN identifier 601 * @kobj: kobject for sysfs vlan subdirectory 602 * @ap_isolation: AP isolation state 603 * @tt: TT private attributes (VLAN specific) 604 * @list: list node for bat_priv::softif_vlan_list 605 * @refcount: number of context where this object is currently in use 606 * @rcu: struct used for freeing in a RCU-safe manner 607 */ 608 struct batadv_softif_vlan { 609 unsigned short vid; 610 struct kobject *kobj; 611 atomic_t ap_isolation; /* boolean */ 612 struct batadv_vlan_tt tt; 613 struct hlist_node list; 614 atomic_t refcount; 615 struct rcu_head rcu; 616 }; 617 618 /** 619 * struct batadv_priv - per mesh interface data 620 * @mesh_state: current status of the mesh (inactive/active/deactivating) 621 * @soft_iface: net device which holds this struct as private data 622 * @stats: structure holding the data for the ndo_get_stats() call 623 * @bat_counters: mesh internal traffic statistic counters (see batadv_counters) 624 * @aggregated_ogms: bool indicating whether OGM aggregation is enabled 625 * @bonding: bool indicating whether traffic bonding is enabled 626 * @fragmentation: bool indicating whether traffic fragmentation is enabled 627 * @packet_size_max: max packet size that can be transmitted via 628 * multiple fragmented skbs or a single frame if fragmentation is disabled 629 * @frag_seqno: incremental counter to identify chains of egress fragments 630 * @bridge_loop_avoidance: bool indicating whether bridge loop avoidance is 631 * enabled 632 * @distributed_arp_table: bool indicating whether distributed ARP table is 633 * enabled 634 * @gw_mode: gateway operation: off, client or server (see batadv_gw_modes) 635 * @gw_sel_class: gateway selection class (applies if gw_mode client) 636 * @orig_interval: OGM broadcast interval in milliseconds 637 * @hop_penalty: penalty which will be applied to an OGM's tq-field on every hop 638 * @log_level: configured log level (see batadv_dbg_level) 639 * @bcast_seqno: last sent broadcast packet sequence number 640 * @bcast_queue_left: number of remaining buffered broadcast packet slots 641 * @batman_queue_left: number of remaining OGM packet slots 642 * @num_ifaces: number of interfaces assigned to this mesh interface 643 * @mesh_obj: kobject for sysfs mesh subdirectory 644 * @debug_dir: dentry for debugfs batman-adv subdirectory 645 * @forw_bat_list: list of aggregated OGMs that will be forwarded 646 * @forw_bcast_list: list of broadcast packets that will be rebroadcasted 647 * @orig_hash: hash table containing mesh participants (orig nodes) 648 * @forw_bat_list_lock: lock protecting forw_bat_list 649 * @forw_bcast_list_lock: lock protecting forw_bcast_list 650 * @orig_work: work queue callback item for orig node purging 651 * @cleanup_work: work queue callback item for soft interface deinit 652 * @primary_if: one of the hard interfaces assigned to this mesh interface 653 * becomes the primary interface 654 * @bat_algo_ops: routing algorithm used by this mesh interface 655 * @softif_vlan_list: a list of softif_vlan structs, one per VLAN created on top 656 * of the mesh interface represented by this object 657 * @softif_vlan_list_lock: lock protecting softif_vlan_list 658 * @bla: bridge loope avoidance data 659 * @debug_log: holding debug logging relevant data 660 * @gw: gateway data 661 * @tt: translation table data 662 * @tvlv: type-version-length-value data 663 * @dat: distributed arp table data 664 * @network_coding: bool indicating whether network coding is enabled 665 * @batadv_priv_nc: network coding data 666 */ 667 struct batadv_priv { 668 atomic_t mesh_state; 669 struct net_device *soft_iface; 670 struct net_device_stats stats; 671 uint64_t __percpu *bat_counters; /* Per cpu counters */ 672 atomic_t aggregated_ogms; 673 atomic_t bonding; 674 atomic_t fragmentation; 675 atomic_t packet_size_max; 676 atomic_t frag_seqno; 677 #ifdef CONFIG_BATMAN_ADV_BLA 678 atomic_t bridge_loop_avoidance; 679 #endif 680 #ifdef CONFIG_BATMAN_ADV_DAT 681 atomic_t distributed_arp_table; 682 #endif 683 atomic_t gw_mode; 684 atomic_t gw_sel_class; 685 atomic_t orig_interval; 686 atomic_t hop_penalty; 687 #ifdef CONFIG_BATMAN_ADV_DEBUG 688 atomic_t log_level; 689 #endif 690 atomic_t bcast_seqno; 691 atomic_t bcast_queue_left; 692 atomic_t batman_queue_left; 693 char num_ifaces; 694 struct kobject *mesh_obj; 695 struct dentry *debug_dir; 696 struct hlist_head forw_bat_list; 697 struct hlist_head forw_bcast_list; 698 struct batadv_hashtable *orig_hash; 699 spinlock_t forw_bat_list_lock; /* protects forw_bat_list */ 700 spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */ 701 struct delayed_work orig_work; 702 struct work_struct cleanup_work; 703 struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */ 704 struct batadv_algo_ops *bat_algo_ops; 705 struct hlist_head softif_vlan_list; 706 spinlock_t softif_vlan_list_lock; /* protects softif_vlan_list */ 707 #ifdef CONFIG_BATMAN_ADV_BLA 708 struct batadv_priv_bla bla; 709 #endif 710 #ifdef CONFIG_BATMAN_ADV_DEBUG 711 struct batadv_priv_debug_log *debug_log; 712 #endif 713 struct batadv_priv_gw gw; 714 struct batadv_priv_tt tt; 715 struct batadv_priv_tvlv tvlv; 716 #ifdef CONFIG_BATMAN_ADV_DAT 717 struct batadv_priv_dat dat; 718 #endif 719 #ifdef CONFIG_BATMAN_ADV_NC 720 atomic_t network_coding; 721 struct batadv_priv_nc nc; 722 #endif /* CONFIG_BATMAN_ADV_NC */ 723 }; 724 725 /** 726 * struct batadv_socket_client - layer2 icmp socket client data 727 * @queue_list: packet queue for packets destined for this socket client 728 * @queue_len: number of packets in the packet queue (queue_list) 729 * @index: socket client's index in the batadv_socket_client_hash 730 * @lock: lock protecting queue_list, queue_len & index 731 * @queue_wait: socket client's wait queue 732 * @bat_priv: pointer to soft_iface this client belongs to 733 */ 734 struct batadv_socket_client { 735 struct list_head queue_list; 736 unsigned int queue_len; 737 unsigned char index; 738 spinlock_t lock; /* protects queue_list, queue_len & index */ 739 wait_queue_head_t queue_wait; 740 struct batadv_priv *bat_priv; 741 }; 742 743 /** 744 * struct batadv_socket_packet - layer2 icmp packet for socket client 745 * @list: list node for batadv_socket_client::queue_list 746 * @icmp_len: size of the layer2 icmp packet 747 * @icmp_packet: layer2 icmp packet 748 */ 749 struct batadv_socket_packet { 750 struct list_head list; 751 size_t icmp_len; 752 uint8_t icmp_packet[BATADV_ICMP_MAX_PACKET_SIZE]; 753 }; 754 755 /** 756 * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN 757 * @orig: originator address of backbone node (mac address of primary iface) 758 * @vid: vlan id this gateway was detected on 759 * @hash_entry: hlist node for batadv_priv_bla::backbone_hash 760 * @bat_priv: pointer to soft_iface this backbone gateway belongs to 761 * @lasttime: last time we heard of this backbone gw 762 * @wait_periods: grace time for bridge forward delays and bla group forming at 763 * bootup phase - no bcast traffic is formwared until it has elapsed 764 * @request_sent: if this bool is set to true we are out of sync with this 765 * backbone gateway - no bcast traffic is formwared until the situation was 766 * resolved 767 * @crc: crc16 checksum over all claims 768 * @refcount: number of contexts the object is used 769 * @rcu: struct used for freeing in an RCU-safe manner 770 */ 771 #ifdef CONFIG_BATMAN_ADV_BLA 772 struct batadv_bla_backbone_gw { 773 uint8_t orig[ETH_ALEN]; 774 unsigned short vid; 775 struct hlist_node hash_entry; 776 struct batadv_priv *bat_priv; 777 unsigned long lasttime; 778 atomic_t wait_periods; 779 atomic_t request_sent; 780 uint16_t crc; 781 atomic_t refcount; 782 struct rcu_head rcu; 783 }; 784 785 /** 786 * struct batadv_bla_claim - claimed non-mesh client structure 787 * @addr: mac address of claimed non-mesh client 788 * @vid: vlan id this client was detected on 789 * @batadv_bla_backbone_gw: pointer to backbone gw claiming this client 790 * @lasttime: last time we heard of claim (locals only) 791 * @hash_entry: hlist node for batadv_priv_bla::claim_hash 792 * @refcount: number of contexts the object is used 793 * @rcu: struct used for freeing in an RCU-safe manner 794 */ 795 struct batadv_bla_claim { 796 uint8_t addr[ETH_ALEN]; 797 unsigned short vid; 798 struct batadv_bla_backbone_gw *backbone_gw; 799 unsigned long lasttime; 800 struct hlist_node hash_entry; 801 struct rcu_head rcu; 802 atomic_t refcount; 803 }; 804 #endif 805 806 /** 807 * struct batadv_tt_common_entry - tt local & tt global common data 808 * @addr: mac address of non-mesh client 809 * @vid: VLAN identifier 810 * @hash_entry: hlist node for batadv_priv_tt::local_hash or for 811 * batadv_priv_tt::global_hash 812 * @flags: various state handling flags (see batadv_tt_client_flags) 813 * @added_at: timestamp used for purging stale tt common entries 814 * @refcount: number of contexts the object is used 815 * @rcu: struct used for freeing in an RCU-safe manner 816 */ 817 struct batadv_tt_common_entry { 818 uint8_t addr[ETH_ALEN]; 819 unsigned short vid; 820 struct hlist_node hash_entry; 821 uint16_t flags; 822 unsigned long added_at; 823 atomic_t refcount; 824 struct rcu_head rcu; 825 }; 826 827 /** 828 * struct batadv_tt_local_entry - translation table local entry data 829 * @common: general translation table data 830 * @last_seen: timestamp used for purging stale tt local entries 831 */ 832 struct batadv_tt_local_entry { 833 struct batadv_tt_common_entry common; 834 unsigned long last_seen; 835 }; 836 837 /** 838 * struct batadv_tt_global_entry - translation table global entry data 839 * @common: general translation table data 840 * @orig_list: list of orig nodes announcing this non-mesh client 841 * @list_lock: lock protecting orig_list 842 * @roam_at: time at which TT_GLOBAL_ROAM was set 843 */ 844 struct batadv_tt_global_entry { 845 struct batadv_tt_common_entry common; 846 struct hlist_head orig_list; 847 spinlock_t list_lock; /* protects orig_list */ 848 unsigned long roam_at; 849 }; 850 851 /** 852 * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client 853 * @orig_node: pointer to orig node announcing this non-mesh client 854 * @ttvn: translation table version number which added the non-mesh client 855 * @list: list node for batadv_tt_global_entry::orig_list 856 * @refcount: number of contexts the object is used 857 * @rcu: struct used for freeing in an RCU-safe manner 858 */ 859 struct batadv_tt_orig_list_entry { 860 struct batadv_orig_node *orig_node; 861 uint8_t ttvn; 862 struct hlist_node list; 863 atomic_t refcount; 864 struct rcu_head rcu; 865 }; 866 867 /** 868 * struct batadv_tt_change_node - structure for tt changes occured 869 * @list: list node for batadv_priv_tt::changes_list 870 * @change: holds the actual translation table diff data 871 */ 872 struct batadv_tt_change_node { 873 struct list_head list; 874 struct batadv_tvlv_tt_change change; 875 }; 876 877 /** 878 * struct batadv_tt_req_node - data to keep track of the tt requests in flight 879 * @addr: mac address address of the originator this request was sent to 880 * @issued_at: timestamp used for purging stale tt requests 881 * @list: list node for batadv_priv_tt::req_list 882 */ 883 struct batadv_tt_req_node { 884 uint8_t addr[ETH_ALEN]; 885 unsigned long issued_at; 886 struct list_head list; 887 }; 888 889 /** 890 * struct batadv_tt_roam_node - roaming client data 891 * @addr: mac address of the client in the roaming phase 892 * @counter: number of allowed roaming events per client within a single 893 * OGM interval (changes are committed with each OGM) 894 * @first_time: timestamp used for purging stale roaming node entries 895 * @list: list node for batadv_priv_tt::roam_list 896 */ 897 struct batadv_tt_roam_node { 898 uint8_t addr[ETH_ALEN]; 899 atomic_t counter; 900 unsigned long first_time; 901 struct list_head list; 902 }; 903 904 /** 905 * struct batadv_nc_node - network coding node 906 * @list: next and prev pointer for the list handling 907 * @addr: the node's mac address 908 * @refcount: number of contexts the object is used by 909 * @rcu: struct used for freeing in an RCU-safe manner 910 * @orig_node: pointer to corresponding orig node struct 911 * @last_seen: timestamp of last ogm received from this node 912 */ 913 struct batadv_nc_node { 914 struct list_head list; 915 uint8_t addr[ETH_ALEN]; 916 atomic_t refcount; 917 struct rcu_head rcu; 918 struct batadv_orig_node *orig_node; 919 unsigned long last_seen; 920 }; 921 922 /** 923 * struct batadv_nc_path - network coding path 924 * @hash_entry: next and prev pointer for the list handling 925 * @rcu: struct used for freeing in an RCU-safe manner 926 * @refcount: number of contexts the object is used by 927 * @packet_list: list of buffered packets for this path 928 * @packet_list_lock: access lock for packet list 929 * @next_hop: next hop (destination) of path 930 * @prev_hop: previous hop (source) of path 931 * @last_valid: timestamp for last validation of path 932 */ 933 struct batadv_nc_path { 934 struct hlist_node hash_entry; 935 struct rcu_head rcu; 936 atomic_t refcount; 937 struct list_head packet_list; 938 spinlock_t packet_list_lock; /* Protects packet_list */ 939 uint8_t next_hop[ETH_ALEN]; 940 uint8_t prev_hop[ETH_ALEN]; 941 unsigned long last_valid; 942 }; 943 944 /** 945 * struct batadv_nc_packet - network coding packet used when coding and 946 * decoding packets 947 * @list: next and prev pointer for the list handling 948 * @packet_id: crc32 checksum of skb data 949 * @timestamp: field containing the info when the packet was added to path 950 * @neigh_node: pointer to original next hop neighbor of skb 951 * @skb: skb which can be encoded or used for decoding 952 * @nc_path: pointer to path this nc packet is attached to 953 */ 954 struct batadv_nc_packet { 955 struct list_head list; 956 __be32 packet_id; 957 unsigned long timestamp; 958 struct batadv_neigh_node *neigh_node; 959 struct sk_buff *skb; 960 struct batadv_nc_path *nc_path; 961 }; 962 963 /** 964 * batadv_skb_cb - control buffer structure used to store private data relevant 965 * to batman-adv in the skb->cb buffer in skbs. 966 * @decoded: Marks a skb as decoded, which is checked when searching for coding 967 * opportunities in network-coding.c 968 */ 969 struct batadv_skb_cb { 970 bool decoded; 971 }; 972 973 /** 974 * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded 975 * @list: list node for batadv_socket_client::queue_list 976 * @send_time: execution time for delayed_work (packet sending) 977 * @own: bool for locally generated packets (local OGMs are re-scheduled after 978 * sending) 979 * @skb: bcast packet's skb buffer 980 * @packet_len: size of aggregated OGM packet inside the skb buffer 981 * @direct_link_flags: direct link flags for aggregated OGM packets 982 * @num_packets: counter for bcast packet retransmission 983 * @delayed_work: work queue callback item for packet sending 984 * @if_incoming: pointer incoming hard-iface or primary iface if locally 985 * generated packet 986 */ 987 struct batadv_forw_packet { 988 struct hlist_node list; 989 unsigned long send_time; 990 uint8_t own; 991 struct sk_buff *skb; 992 uint16_t packet_len; 993 uint32_t direct_link_flags; 994 uint8_t num_packets; 995 struct delayed_work delayed_work; 996 struct batadv_hard_iface *if_incoming; 997 }; 998 999 /** 1000 * struct batadv_algo_ops - mesh algorithm callbacks 1001 * @list: list node for the batadv_algo_list 1002 * @name: name of the algorithm 1003 * @bat_iface_enable: init routing info when hard-interface is enabled 1004 * @bat_iface_disable: de-init routing info when hard-interface is disabled 1005 * @bat_iface_update_mac: (re-)init mac addresses of the protocol information 1006 * belonging to this hard-interface 1007 * @bat_primary_iface_set: called when primary interface is selected / changed 1008 * @bat_ogm_schedule: prepare a new outgoing OGM for the send queue 1009 * @bat_ogm_emit: send scheduled OGM 1010 * @bat_neigh_cmp: compare the metrics of two neighbors 1011 * @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or 1012 * better than neigh2 from the metric prospective 1013 * @bat_orig_print: print the originator table (optional) 1014 * @bat_orig_free: free the resources allocated by the routing algorithm for an 1015 * orig_node object 1016 * @bat_orig_add_if: ask the routing algorithm to apply the needed changes to 1017 * the orig_node due to a new hard-interface being added into the mesh 1018 * @bat_orig_del_if: ask the routing algorithm to apply the needed changes to 1019 * the orig_node due to an hard-interface being removed from the mesh 1020 */ 1021 struct batadv_algo_ops { 1022 struct hlist_node list; 1023 char *name; 1024 int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface); 1025 void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface); 1026 void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface); 1027 void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface); 1028 void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface); 1029 void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet); 1030 int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1, 1031 struct batadv_neigh_node *neigh2); 1032 bool (*bat_neigh_is_equiv_or_better)(struct batadv_neigh_node *neigh1, 1033 struct batadv_neigh_node *neigh2); 1034 /* orig_node handling API */ 1035 void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq); 1036 void (*bat_orig_free)(struct batadv_orig_node *orig_node); 1037 int (*bat_orig_add_if)(struct batadv_orig_node *orig_node, 1038 int max_if_num); 1039 int (*bat_orig_del_if)(struct batadv_orig_node *orig_node, 1040 int max_if_num, int del_if_num); 1041 }; 1042 1043 /** 1044 * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It 1045 * is used to stored ARP entries needed for the global DAT cache 1046 * @ip: the IPv4 corresponding to this DAT/ARP entry 1047 * @mac_addr: the MAC address associated to the stored IPv4 1048 * @vid: the vlan ID associated to this entry 1049 * @last_update: time in jiffies when this entry was refreshed last time 1050 * @hash_entry: hlist node for batadv_priv_dat::hash 1051 * @refcount: number of contexts the object is used 1052 * @rcu: struct used for freeing in an RCU-safe manner 1053 */ 1054 struct batadv_dat_entry { 1055 __be32 ip; 1056 uint8_t mac_addr[ETH_ALEN]; 1057 unsigned short vid; 1058 unsigned long last_update; 1059 struct hlist_node hash_entry; 1060 atomic_t refcount; 1061 struct rcu_head rcu; 1062 }; 1063 1064 /** 1065 * struct batadv_dat_candidate - candidate destination for DAT operations 1066 * @type: the type of the selected candidate. It can one of the following: 1067 * - BATADV_DAT_CANDIDATE_NOT_FOUND 1068 * - BATADV_DAT_CANDIDATE_ORIG 1069 * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the 1070 * corresponding originator node structure 1071 */ 1072 struct batadv_dat_candidate { 1073 int type; 1074 struct batadv_orig_node *orig_node; 1075 }; 1076 1077 /** 1078 * struct batadv_tvlv_container - container for tvlv appended to OGMs 1079 * @list: hlist node for batadv_priv_tvlv::container_list 1080 * @tvlv_hdr: tvlv header information needed to construct the tvlv 1081 * @value_len: length of the buffer following this struct which contains 1082 * the actual tvlv payload 1083 * @refcount: number of contexts the object is used 1084 */ 1085 struct batadv_tvlv_container { 1086 struct hlist_node list; 1087 struct batadv_tvlv_hdr tvlv_hdr; 1088 atomic_t refcount; 1089 }; 1090 1091 /** 1092 * struct batadv_tvlv_handler - handler for specific tvlv type and version 1093 * @list: hlist node for batadv_priv_tvlv::handler_list 1094 * @ogm_handler: handler callback which is given the tvlv payload to process on 1095 * incoming OGM packets 1096 * @unicast_handler: handler callback which is given the tvlv payload to process 1097 * on incoming unicast tvlv packets 1098 * @type: tvlv type this handler feels responsible for 1099 * @version: tvlv version this handler feels responsible for 1100 * @flags: tvlv handler flags 1101 * @refcount: number of contexts the object is used 1102 * @rcu: struct used for freeing in an RCU-safe manner 1103 */ 1104 struct batadv_tvlv_handler { 1105 struct hlist_node list; 1106 void (*ogm_handler)(struct batadv_priv *bat_priv, 1107 struct batadv_orig_node *orig, 1108 uint8_t flags, 1109 void *tvlv_value, uint16_t tvlv_value_len); 1110 int (*unicast_handler)(struct batadv_priv *bat_priv, 1111 uint8_t *src, uint8_t *dst, 1112 void *tvlv_value, uint16_t tvlv_value_len); 1113 uint8_t type; 1114 uint8_t version; 1115 uint8_t flags; 1116 atomic_t refcount; 1117 struct rcu_head rcu; 1118 }; 1119 1120 /** 1121 * enum batadv_tvlv_handler_flags - tvlv handler flags definitions 1122 * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function will call 1123 * this handler even if its type was not found (with no data) 1124 * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the API marks 1125 * a handler as being called, so it won't be called if the 1126 * BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set 1127 */ 1128 enum batadv_tvlv_handler_flags { 1129 BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1), 1130 BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2), 1131 }; 1132 1133 #endif /* _NET_BATMAN_ADV_TYPES_H_ */ 1134