1 /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
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.
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.
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/>.
18 #ifndef _NET_BATMAN_ADV_TYPES_H_
19 #define _NET_BATMAN_ADV_TYPES_H_
23 #include <linux/kernel.h>
25 #ifdef CONFIG_BATMAN_ADV_DAT
27 /* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed,
28 * BATADV_DAT_ADDR_MAX is changed as well.
30 * *Please be careful: batadv_dat_addr_t must be UNSIGNED*
32 #define batadv_dat_addr_t uint16_t
34 #endif /* CONFIG_BATMAN_ADV_DAT */
37 * enum batadv_dhcp_recipient - dhcp destination
38 * @BATADV_DHCP_NO: packet is not a dhcp message
39 * @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server
40 * @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client
42 enum batadv_dhcp_recipient {
44 BATADV_DHCP_TO_SERVER,
45 BATADV_DHCP_TO_CLIENT,
49 * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the
52 #define BATADV_TT_REMOTE_MASK 0x00FF
55 * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync
56 * among the nodes. These flags are used to compute the global/local CRC
58 #define BATADV_TT_SYNC_MASK 0x00F0
61 * struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data
62 * @ogm_buff: buffer holding the OGM packet
63 * @ogm_buff_len: length of the OGM packet buffer
64 * @ogm_seqno: OGM sequence number - used to identify each OGM
66 struct batadv_hard_iface_bat_iv {
67 unsigned char *ogm_buff;
73 * struct batadv_hard_iface - network device known to batman-adv
74 * @list: list node for batadv_hardif_list
75 * @if_num: identificator of the interface
76 * @if_status: status of the interface for batman-adv
77 * @net_dev: pointer to the net_device
78 * @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
79 * @hardif_obj: kobject of the per interface sysfs "mesh" directory
80 * @refcount: number of contexts the object is used
81 * @batman_adv_ptype: packet type describing packets that should be processed by
82 * batman-adv for this interface
83 * @soft_iface: the batman-adv interface which uses this network interface
84 * @rcu: struct used for freeing in an RCU-safe manner
85 * @bat_iv: BATMAN IV specific per hard interface data
86 * @cleanup_work: work queue callback item for hard interface deinit
88 struct batadv_hard_iface {
89 struct list_head list;
92 struct net_device *net_dev;
94 struct kobject *hardif_obj;
96 struct packet_type batman_adv_ptype;
97 struct net_device *soft_iface;
99 struct batadv_hard_iface_bat_iv bat_iv;
100 struct work_struct cleanup_work;
104 * struct batadv_frag_table_entry - head in the fragment buffer table
105 * @head: head of list with fragments
106 * @lock: lock to protect the list of fragments
107 * @timestamp: time (jiffie) of last received fragment
108 * @seqno: sequence number of the fragments in the list
109 * @size: accumulated size of packets in list
111 struct batadv_frag_table_entry {
112 struct hlist_head head;
113 spinlock_t lock; /* protects head */
114 unsigned long timestamp;
120 * struct batadv_frag_list_entry - entry in a list of fragments
121 * @list: list node information
123 * @no: fragment number in the set
125 struct batadv_frag_list_entry {
126 struct hlist_node list;
132 * struct batadv_vlan_tt - VLAN specific TT attributes
133 * @crc: CRC32 checksum of the entries belonging to this vlan
134 * @num_entries: number of TT entries for this VLAN
136 struct batadv_vlan_tt {
138 atomic_t num_entries;
142 * batadv_orig_node_vlan - VLAN specific data per orig_node
143 * @vid: the VLAN identifier
144 * @tt: VLAN specific TT attributes
145 * @list: list node for orig_node::vlan_list
146 * @refcount: number of context where this object is currently in use
147 * @rcu: struct used for freeing in a RCU-safe manner
149 struct batadv_orig_node_vlan {
151 struct batadv_vlan_tt tt;
152 struct list_head list;
158 * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members
159 * @bcast_own: bitfield containing the number of our OGMs this orig_node
160 * rebroadcasted "back" to us (relative to last_real_seqno)
161 * @bcast_own_sum: counted result of bcast_own
162 * @ogm_cnt_lock: lock protecting bcast_own, bcast_own_sum,
163 * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count
165 struct batadv_orig_bat_iv {
166 unsigned long *bcast_own;
167 uint8_t *bcast_own_sum;
168 /* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
169 * neigh_node->bat_iv.real_bits & neigh_node->bat_iv.real_packet_count
171 spinlock_t ogm_cnt_lock;
175 * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
176 * @orig: originator ethernet address
177 * @primary_addr: hosts primary interface address
178 * @router: router that should be used to reach this originator
179 * @batadv_dat_addr_t: address of the orig node in the distributed hash
180 * @last_seen: time when last packet from this node was received
181 * @bcast_seqno_reset: time when the broadcast seqno window was reset
182 * @batman_seqno_reset: time when the batman seqno window was reset
183 * @capabilities: announced capabilities of this originator
184 * @last_ttvn: last seen translation table version number
185 * @tt_buff: last tt changeset this node received from the orig node
186 * @tt_buff_len: length of the last tt changeset this node received from the
188 * @tt_buff_lock: lock that protects tt_buff and tt_buff_len
189 * @tt_initialised: bool keeping track of whether or not this node have received
190 * any translation table information from the orig node yet
191 * @tt_lock: prevents from updating the table while reading it. Table update is
192 * made up by two operations (data structure update and metdata -CRC/TTVN-
193 * recalculation) and they have to be executed atomically in order to avoid
194 * another thread to read the table/metadata between those.
195 * @last_real_seqno: last and best known sequence number
196 * @last_ttl: ttl of last received packet
197 * @bcast_bits: bitfield containing the info which payload broadcast originated
198 * from this orig node this host already has seen (relative to
200 * @last_bcast_seqno: last broadcast sequence number received by this host
201 * @neigh_list: list of potential next hop neighbor towards this orig node
202 * @neigh_list_lock: lock protecting neigh_list, router and bonding_list
203 * @hash_entry: hlist node for batadv_priv::orig_hash
204 * @bat_priv: pointer to soft_iface this orig node belongs to
205 * @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno
206 * @bond_candidates: how many candidates are available
207 * @bond_list: list of bonding candidates
208 * @refcount: number of contexts the object is used
209 * @rcu: struct used for freeing in an RCU-safe manner
210 * @in_coding_list: list of nodes this orig can hear
211 * @out_coding_list: list of nodes that can hear this orig
212 * @in_coding_list_lock: protects in_coding_list
213 * @out_coding_list_lock: protects out_coding_list
214 * @fragments: array with heads for fragment chains
215 * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by the
216 * originator represented by this object
217 * @vlan_list_lock: lock protecting vlan_list
218 * @bat_iv: B.A.T.M.A.N. IV private structure
220 struct batadv_orig_node {
221 uint8_t orig[ETH_ALEN];
222 uint8_t primary_addr[ETH_ALEN];
223 struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
224 #ifdef CONFIG_BATMAN_ADV_DAT
225 batadv_dat_addr_t dat_addr;
227 unsigned long last_seen;
228 unsigned long bcast_seqno_reset;
229 unsigned long batman_seqno_reset;
230 uint8_t capabilities;
232 unsigned char *tt_buff;
234 spinlock_t tt_buff_lock; /* protects tt_buff & tt_buff_len */
236 /* prevents from changing the table while reading it */
238 uint32_t last_real_seqno;
240 DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
241 uint32_t last_bcast_seqno;
242 struct hlist_head neigh_list;
243 /* neigh_list_lock protects: neigh_list, router & bonding_list */
244 spinlock_t neigh_list_lock;
245 struct hlist_node hash_entry;
246 struct batadv_priv *bat_priv;
247 /* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */
248 spinlock_t bcast_seqno_lock;
249 atomic_t bond_candidates;
250 struct list_head bond_list;
253 #ifdef CONFIG_BATMAN_ADV_NC
254 struct list_head in_coding_list;
255 struct list_head out_coding_list;
256 spinlock_t in_coding_list_lock; /* Protects in_coding_list */
257 spinlock_t out_coding_list_lock; /* Protects out_coding_list */
259 struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT];
260 struct list_head vlan_list;
261 spinlock_t vlan_list_lock; /* protects vlan_list */
262 struct batadv_orig_bat_iv bat_iv;
266 * enum batadv_orig_capabilities - orig node capabilities
267 * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled
268 * @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled
270 enum batadv_orig_capabilities {
271 BATADV_ORIG_CAPA_HAS_DAT = BIT(0),
272 BATADV_ORIG_CAPA_HAS_NC = BIT(1),
276 * struct batadv_gw_node - structure for orig nodes announcing gw capabilities
277 * @list: list node for batadv_priv_gw::list
278 * @orig_node: pointer to corresponding orig node
279 * @bandwidth_down: advertised uplink download bandwidth
280 * @bandwidth_up: advertised uplink upload bandwidth
281 * @deleted: this struct is scheduled for deletion
282 * @refcount: number of contexts the object is used
283 * @rcu: struct used for freeing in an RCU-safe manner
285 struct batadv_gw_node {
286 struct hlist_node list;
287 struct batadv_orig_node *orig_node;
288 uint32_t bandwidth_down;
289 uint32_t bandwidth_up;
290 unsigned long deleted;
296 * struct batadv_neigh_bat_iv - B.A.T.M.A.N. IV specific structure for single
298 * @tq_recv: ring buffer of received TQ values from this neigh node
299 * @tq_index: ring buffer index
300 * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv)
301 * @real_bits: bitfield containing the number of OGMs received from this neigh
302 * node (relative to orig_node->last_real_seqno)
303 * @real_packet_count: counted result of real_bits
304 * @lq_update_lock: lock protecting tq_recv & tq_index
306 struct batadv_neigh_bat_iv {
307 uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
310 DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
311 uint8_t real_packet_count;
312 spinlock_t lq_update_lock; /* protects tq_recv & tq_index */
316 * struct batadv_neigh_node - structure for single hops neighbors
317 * @list: list node for batadv_orig_node::neigh_list
318 * @orig_node: pointer to corresponding orig_node
319 * @addr: the MAC address of the neighboring interface
320 * @if_incoming: pointer to incoming hard interface
321 * @last_seen: when last packet via this neighbor was received
322 * @last_ttl: last received ttl from this neigh node
323 * @bonding_list: list node for batadv_orig_node::bond_list
324 * @refcount: number of contexts the object is used
325 * @rcu: struct used for freeing in an RCU-safe manner
326 * @bat_iv: B.A.T.M.A.N. IV private structure
328 struct batadv_neigh_node {
329 struct hlist_node list;
330 struct batadv_orig_node *orig_node;
331 uint8_t addr[ETH_ALEN];
332 struct batadv_hard_iface *if_incoming;
333 unsigned long last_seen;
335 struct list_head bonding_list;
338 struct batadv_neigh_bat_iv bat_iv;
342 * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression
343 * @orig[ETH_ALEN]: mac address of orig node orginating the broadcast
344 * @crc: crc32 checksum of broadcast payload
345 * @entrytime: time when the broadcast packet was received
347 #ifdef CONFIG_BATMAN_ADV_BLA
348 struct batadv_bcast_duplist_entry {
349 uint8_t orig[ETH_ALEN];
351 unsigned long entrytime;
356 * enum batadv_counters - indices for traffic counters
357 * @BATADV_CNT_TX: transmitted payload traffic packet counter
358 * @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter
359 * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet counter
360 * @BATADV_CNT_RX: received payload traffic packet counter
361 * @BATADV_CNT_RX_BYTES: received payload traffic bytes counter
362 * @BATADV_CNT_FORWARD: forwarded payload traffic packet counter
363 * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter
364 * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet counter
365 * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes counter
366 * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter
367 * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes counter
368 * @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter
369 * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter
370 * @BATADV_CNT_FRAG_RX: received fragment traffic packet counter
371 * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter
372 * @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter
373 * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter
374 * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter
375 * @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter
376 * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet counter
377 * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter
378 * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet counter
379 * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter
380 * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter
381 * @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter
382 * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter
383 * @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter
384 * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic packet
386 * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter
387 * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes counter
388 * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet counter
389 * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes counter
390 * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc decoding
391 * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter
392 * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes counter
393 * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic packet
395 * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in promisc
397 * @BATADV_CNT_NUM: number of traffic counters
399 enum batadv_counters {
402 BATADV_CNT_TX_DROPPED,
406 BATADV_CNT_FORWARD_BYTES,
408 BATADV_CNT_MGMT_TX_BYTES,
410 BATADV_CNT_MGMT_RX_BYTES,
412 BATADV_CNT_FRAG_TX_BYTES,
414 BATADV_CNT_FRAG_RX_BYTES,
416 BATADV_CNT_FRAG_FWD_BYTES,
417 BATADV_CNT_TT_REQUEST_TX,
418 BATADV_CNT_TT_REQUEST_RX,
419 BATADV_CNT_TT_RESPONSE_TX,
420 BATADV_CNT_TT_RESPONSE_RX,
421 BATADV_CNT_TT_ROAM_ADV_TX,
422 BATADV_CNT_TT_ROAM_ADV_RX,
423 #ifdef CONFIG_BATMAN_ADV_DAT
424 BATADV_CNT_DAT_GET_TX,
425 BATADV_CNT_DAT_GET_RX,
426 BATADV_CNT_DAT_PUT_TX,
427 BATADV_CNT_DAT_PUT_RX,
428 BATADV_CNT_DAT_CACHED_REPLY_TX,
430 #ifdef CONFIG_BATMAN_ADV_NC
432 BATADV_CNT_NC_CODE_BYTES,
433 BATADV_CNT_NC_RECODE,
434 BATADV_CNT_NC_RECODE_BYTES,
435 BATADV_CNT_NC_BUFFER,
436 BATADV_CNT_NC_DECODE,
437 BATADV_CNT_NC_DECODE_BYTES,
438 BATADV_CNT_NC_DECODE_FAILED,
439 BATADV_CNT_NC_SNIFFED,
445 * struct batadv_priv_tt - per mesh interface translation table data
446 * @vn: translation table version number
447 * @ogm_append_cnt: counter of number of OGMs containing the local tt diff
448 * @local_changes: changes registered in an originator interval
449 * @changes_list: tracks tt local changes within an originator interval
450 * @local_hash: local translation table hash table
451 * @global_hash: global translation table hash table
452 * @req_list: list of pending & unanswered tt_requests
453 * @roam_list: list of the last roaming events of each client limiting the
454 * number of roaming events to avoid route flapping
455 * @changes_list_lock: lock protecting changes_list
456 * @req_list_lock: lock protecting req_list
457 * @roam_list_lock: lock protecting roam_list
458 * @last_changeset: last tt changeset this host has generated
459 * @last_changeset_len: length of last tt changeset this host has generated
460 * @last_changeset_lock: lock protecting last_changeset & last_changeset_len
461 * @commit_lock: prevents from executing a local TT commit while reading the
462 * local table. The local TT commit is made up by two operations (data
463 * structure update and metdata -CRC/TTVN- recalculation) and they have to be
464 * executed atomically in order to avoid another thread to read the
465 * table/metadata between those.
466 * @work: work queue callback item for translation table purging
468 struct batadv_priv_tt {
470 atomic_t ogm_append_cnt;
471 atomic_t local_changes;
472 struct list_head changes_list;
473 struct batadv_hashtable *local_hash;
474 struct batadv_hashtable *global_hash;
475 struct list_head req_list;
476 struct list_head roam_list;
477 spinlock_t changes_list_lock; /* protects changes */
478 spinlock_t req_list_lock; /* protects req_list */
479 spinlock_t roam_list_lock; /* protects roam_list */
480 unsigned char *last_changeset;
481 int16_t last_changeset_len;
482 /* protects last_changeset & last_changeset_len */
483 spinlock_t last_changeset_lock;
484 /* prevents from executing a commit while reading the table */
485 spinlock_t commit_lock;
486 struct delayed_work work;
490 * struct batadv_priv_bla - per mesh interface bridge loope avoidance data
491 * @num_requests; number of bla requests in flight
492 * @claim_hash: hash table containing mesh nodes this host has claimed
493 * @backbone_hash: hash table containing all detected backbone gateways
494 * @bcast_duplist: recently received broadcast packets array (for broadcast
495 * duplicate suppression)
496 * @bcast_duplist_curr: index of last broadcast packet added to bcast_duplist
497 * @bcast_duplist_lock: lock protecting bcast_duplist & bcast_duplist_curr
498 * @claim_dest: local claim data (e.g. claim group)
499 * @work: work queue callback item for cleanups & bla announcements
501 #ifdef CONFIG_BATMAN_ADV_BLA
502 struct batadv_priv_bla {
503 atomic_t num_requests;
504 struct batadv_hashtable *claim_hash;
505 struct batadv_hashtable *backbone_hash;
506 struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
507 int bcast_duplist_curr;
508 /* protects bcast_duplist & bcast_duplist_curr */
509 spinlock_t bcast_duplist_lock;
510 struct batadv_bla_claim_dst claim_dest;
511 struct delayed_work work;
516 * struct batadv_debug_log - debug logging data
517 * @log_buff: buffer holding the logs (ring bufer)
518 * @log_start: index of next character to read
519 * @log_end: index of next character to write
520 * @lock: lock protecting log_buff, log_start & log_end
521 * @queue_wait: log reader's wait queue
523 #ifdef CONFIG_BATMAN_ADV_DEBUG
524 struct batadv_priv_debug_log {
525 char log_buff[BATADV_LOG_BUF_LEN];
526 unsigned long log_start;
527 unsigned long log_end;
528 spinlock_t lock; /* protects log_buff, log_start and log_end */
529 wait_queue_head_t queue_wait;
534 * struct batadv_priv_gw - per mesh interface gateway data
535 * @list: list of available gateway nodes
536 * @list_lock: lock protecting gw_list & curr_gw
537 * @curr_gw: pointer to currently selected gateway node
538 * @bandwidth_down: advertised uplink download bandwidth (if gw_mode server)
539 * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server)
540 * @reselect: bool indicating a gateway re-selection is in progress
542 struct batadv_priv_gw {
543 struct hlist_head list;
544 spinlock_t list_lock; /* protects gw_list & curr_gw */
545 struct batadv_gw_node __rcu *curr_gw; /* rcu protected pointer */
546 atomic_t bandwidth_down;
547 atomic_t bandwidth_up;
552 * struct batadv_priv_tvlv - per mesh interface tvlv data
553 * @container_list: list of registered tvlv containers to be sent with each OGM
554 * @handler_list: list of the various tvlv content handlers
555 * @container_list_lock: protects tvlv container list access
556 * @handler_list_lock: protects handler list access
558 struct batadv_priv_tvlv {
559 struct hlist_head container_list;
560 struct hlist_head handler_list;
561 spinlock_t container_list_lock; /* protects container_list */
562 spinlock_t handler_list_lock; /* protects handler_list */
566 * struct batadv_priv_dat - per mesh interface DAT private data
567 * @addr: node DAT address
568 * @hash: hashtable representing the local ARP cache
569 * @work: work queue callback item for cache purging
571 #ifdef CONFIG_BATMAN_ADV_DAT
572 struct batadv_priv_dat {
573 batadv_dat_addr_t addr;
574 struct batadv_hashtable *hash;
575 struct delayed_work work;
580 * struct batadv_priv_nc - per mesh interface network coding private data
581 * @work: work queue callback item for cleanup
582 * @debug_dir: dentry for nc subdir in batman-adv directory in debugfs
583 * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq
584 * @max_fwd_delay: maximum packet forward delay to allow coding of packets
585 * @max_buffer_time: buffer time for sniffed packets used to decoding
586 * @timestamp_fwd_flush: timestamp of last forward packet queue flush
587 * @timestamp_sniffed_purge: timestamp of last sniffed packet queue purge
588 * @coding_hash: Hash table used to buffer skbs while waiting for another
589 * incoming skb to code it with. Skbs are added to the buffer just before being
590 * forwarded in routing.c
591 * @decoding_hash: Hash table used to buffer skbs that might be needed to decode
592 * a received coded skb. The buffer is used for 1) skbs arriving on the
593 * soft-interface; 2) skbs overheard on the hard-interface; and 3) skbs
594 * forwarded by batman-adv.
596 struct batadv_priv_nc {
597 struct delayed_work work;
598 struct dentry *debug_dir;
602 unsigned long timestamp_fwd_flush;
603 unsigned long timestamp_sniffed_purge;
604 struct batadv_hashtable *coding_hash;
605 struct batadv_hashtable *decoding_hash;
609 * struct batadv_softif_vlan - per VLAN attributes set
610 * @vid: VLAN identifier
611 * @kobj: kobject for sysfs vlan subdirectory
612 * @ap_isolation: AP isolation state
613 * @tt: TT private attributes (VLAN specific)
614 * @list: list node for bat_priv::softif_vlan_list
615 * @refcount: number of context where this object is currently in use
616 * @rcu: struct used for freeing in a RCU-safe manner
618 struct batadv_softif_vlan {
620 struct kobject *kobj;
621 atomic_t ap_isolation; /* boolean */
622 struct batadv_vlan_tt tt;
623 struct hlist_node list;
629 * struct batadv_priv - per mesh interface data
630 * @mesh_state: current status of the mesh (inactive/active/deactivating)
631 * @soft_iface: net device which holds this struct as private data
632 * @stats: structure holding the data for the ndo_get_stats() call
633 * @bat_counters: mesh internal traffic statistic counters (see batadv_counters)
634 * @aggregated_ogms: bool indicating whether OGM aggregation is enabled
635 * @bonding: bool indicating whether traffic bonding is enabled
636 * @fragmentation: bool indicating whether traffic fragmentation is enabled
637 * @packet_size_max: max packet size that can be transmitted via
638 * multiple fragmented skbs or a single frame if fragmentation is disabled
639 * @frag_seqno: incremental counter to identify chains of egress fragments
640 * @bridge_loop_avoidance: bool indicating whether bridge loop avoidance is
642 * @distributed_arp_table: bool indicating whether distributed ARP table is
644 * @gw_mode: gateway operation: off, client or server (see batadv_gw_modes)
645 * @gw_sel_class: gateway selection class (applies if gw_mode client)
646 * @orig_interval: OGM broadcast interval in milliseconds
647 * @hop_penalty: penalty which will be applied to an OGM's tq-field on every hop
648 * @log_level: configured log level (see batadv_dbg_level)
649 * @bcast_seqno: last sent broadcast packet sequence number
650 * @bcast_queue_left: number of remaining buffered broadcast packet slots
651 * @batman_queue_left: number of remaining OGM packet slots
652 * @num_ifaces: number of interfaces assigned to this mesh interface
653 * @mesh_obj: kobject for sysfs mesh subdirectory
654 * @debug_dir: dentry for debugfs batman-adv subdirectory
655 * @forw_bat_list: list of aggregated OGMs that will be forwarded
656 * @forw_bcast_list: list of broadcast packets that will be rebroadcasted
657 * @orig_hash: hash table containing mesh participants (orig nodes)
658 * @forw_bat_list_lock: lock protecting forw_bat_list
659 * @forw_bcast_list_lock: lock protecting forw_bcast_list
660 * @orig_work: work queue callback item for orig node purging
661 * @cleanup_work: work queue callback item for soft interface deinit
662 * @primary_if: one of the hard interfaces assigned to this mesh interface
663 * becomes the primary interface
664 * @bat_algo_ops: routing algorithm used by this mesh interface
665 * @softif_vlan_list: a list of softif_vlan structs, one per VLAN created on top
666 * of the mesh interface represented by this object
667 * @softif_vlan_list_lock: lock protecting softif_vlan_list
668 * @bla: bridge loope avoidance data
669 * @debug_log: holding debug logging relevant data
671 * @tt: translation table data
672 * @tvlv: type-version-length-value data
673 * @dat: distributed arp table data
674 * @network_coding: bool indicating whether network coding is enabled
675 * @batadv_priv_nc: network coding data
679 struct net_device *soft_iface;
680 struct net_device_stats stats;
681 uint64_t __percpu *bat_counters; /* Per cpu counters */
682 atomic_t aggregated_ogms;
684 atomic_t fragmentation;
685 atomic_t packet_size_max;
687 #ifdef CONFIG_BATMAN_ADV_BLA
688 atomic_t bridge_loop_avoidance;
690 #ifdef CONFIG_BATMAN_ADV_DAT
691 atomic_t distributed_arp_table;
694 atomic_t gw_sel_class;
695 atomic_t orig_interval;
696 atomic_t hop_penalty;
697 #ifdef CONFIG_BATMAN_ADV_DEBUG
700 uint32_t isolation_mark;
701 uint32_t isolation_mark_mask;
702 atomic_t bcast_seqno;
703 atomic_t bcast_queue_left;
704 atomic_t batman_queue_left;
706 struct kobject *mesh_obj;
707 struct dentry *debug_dir;
708 struct hlist_head forw_bat_list;
709 struct hlist_head forw_bcast_list;
710 struct batadv_hashtable *orig_hash;
711 spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
712 spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
713 struct delayed_work orig_work;
714 struct work_struct cleanup_work;
715 struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */
716 struct batadv_algo_ops *bat_algo_ops;
717 struct hlist_head softif_vlan_list;
718 spinlock_t softif_vlan_list_lock; /* protects softif_vlan_list */
719 #ifdef CONFIG_BATMAN_ADV_BLA
720 struct batadv_priv_bla bla;
722 #ifdef CONFIG_BATMAN_ADV_DEBUG
723 struct batadv_priv_debug_log *debug_log;
725 struct batadv_priv_gw gw;
726 struct batadv_priv_tt tt;
727 struct batadv_priv_tvlv tvlv;
728 #ifdef CONFIG_BATMAN_ADV_DAT
729 struct batadv_priv_dat dat;
731 #ifdef CONFIG_BATMAN_ADV_NC
732 atomic_t network_coding;
733 struct batadv_priv_nc nc;
734 #endif /* CONFIG_BATMAN_ADV_NC */
738 * struct batadv_socket_client - layer2 icmp socket client data
739 * @queue_list: packet queue for packets destined for this socket client
740 * @queue_len: number of packets in the packet queue (queue_list)
741 * @index: socket client's index in the batadv_socket_client_hash
742 * @lock: lock protecting queue_list, queue_len & index
743 * @queue_wait: socket client's wait queue
744 * @bat_priv: pointer to soft_iface this client belongs to
746 struct batadv_socket_client {
747 struct list_head queue_list;
748 unsigned int queue_len;
750 spinlock_t lock; /* protects queue_list, queue_len & index */
751 wait_queue_head_t queue_wait;
752 struct batadv_priv *bat_priv;
756 * struct batadv_socket_packet - layer2 icmp packet for socket client
757 * @list: list node for batadv_socket_client::queue_list
758 * @icmp_len: size of the layer2 icmp packet
759 * @icmp_packet: layer2 icmp packet
761 struct batadv_socket_packet {
762 struct list_head list;
764 uint8_t icmp_packet[BATADV_ICMP_MAX_PACKET_SIZE];
768 * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN
769 * @orig: originator address of backbone node (mac address of primary iface)
770 * @vid: vlan id this gateway was detected on
771 * @hash_entry: hlist node for batadv_priv_bla::backbone_hash
772 * @bat_priv: pointer to soft_iface this backbone gateway belongs to
773 * @lasttime: last time we heard of this backbone gw
774 * @wait_periods: grace time for bridge forward delays and bla group forming at
775 * bootup phase - no bcast traffic is formwared until it has elapsed
776 * @request_sent: if this bool is set to true we are out of sync with this
777 * backbone gateway - no bcast traffic is formwared until the situation was
779 * @crc: crc16 checksum over all claims
780 * @refcount: number of contexts the object is used
781 * @rcu: struct used for freeing in an RCU-safe manner
783 #ifdef CONFIG_BATMAN_ADV_BLA
784 struct batadv_bla_backbone_gw {
785 uint8_t orig[ETH_ALEN];
787 struct hlist_node hash_entry;
788 struct batadv_priv *bat_priv;
789 unsigned long lasttime;
790 atomic_t wait_periods;
791 atomic_t request_sent;
798 * struct batadv_bla_claim - claimed non-mesh client structure
799 * @addr: mac address of claimed non-mesh client
800 * @vid: vlan id this client was detected on
801 * @batadv_bla_backbone_gw: pointer to backbone gw claiming this client
802 * @lasttime: last time we heard of claim (locals only)
803 * @hash_entry: hlist node for batadv_priv_bla::claim_hash
804 * @refcount: number of contexts the object is used
805 * @rcu: struct used for freeing in an RCU-safe manner
807 struct batadv_bla_claim {
808 uint8_t addr[ETH_ALEN];
810 struct batadv_bla_backbone_gw *backbone_gw;
811 unsigned long lasttime;
812 struct hlist_node hash_entry;
819 * struct batadv_tt_common_entry - tt local & tt global common data
820 * @addr: mac address of non-mesh client
821 * @vid: VLAN identifier
822 * @hash_entry: hlist node for batadv_priv_tt::local_hash or for
823 * batadv_priv_tt::global_hash
824 * @flags: various state handling flags (see batadv_tt_client_flags)
825 * @added_at: timestamp used for purging stale tt common entries
826 * @refcount: number of contexts the object is used
827 * @rcu: struct used for freeing in an RCU-safe manner
829 struct batadv_tt_common_entry {
830 uint8_t addr[ETH_ALEN];
832 struct hlist_node hash_entry;
834 unsigned long added_at;
840 * struct batadv_tt_local_entry - translation table local entry data
841 * @common: general translation table data
842 * @last_seen: timestamp used for purging stale tt local entries
844 struct batadv_tt_local_entry {
845 struct batadv_tt_common_entry common;
846 unsigned long last_seen;
850 * struct batadv_tt_global_entry - translation table global entry data
851 * @common: general translation table data
852 * @orig_list: list of orig nodes announcing this non-mesh client
853 * @list_lock: lock protecting orig_list
854 * @roam_at: time at which TT_GLOBAL_ROAM was set
856 struct batadv_tt_global_entry {
857 struct batadv_tt_common_entry common;
858 struct hlist_head orig_list;
859 spinlock_t list_lock; /* protects orig_list */
860 unsigned long roam_at;
864 * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client
865 * @orig_node: pointer to orig node announcing this non-mesh client
866 * @ttvn: translation table version number which added the non-mesh client
867 * @list: list node for batadv_tt_global_entry::orig_list
868 * @refcount: number of contexts the object is used
869 * @rcu: struct used for freeing in an RCU-safe manner
871 struct batadv_tt_orig_list_entry {
872 struct batadv_orig_node *orig_node;
874 struct hlist_node list;
880 * struct batadv_tt_change_node - structure for tt changes occured
881 * @list: list node for batadv_priv_tt::changes_list
882 * @change: holds the actual translation table diff data
884 struct batadv_tt_change_node {
885 struct list_head list;
886 struct batadv_tvlv_tt_change change;
890 * struct batadv_tt_req_node - data to keep track of the tt requests in flight
891 * @addr: mac address address of the originator this request was sent to
892 * @issued_at: timestamp used for purging stale tt requests
893 * @list: list node for batadv_priv_tt::req_list
895 struct batadv_tt_req_node {
896 uint8_t addr[ETH_ALEN];
897 unsigned long issued_at;
898 struct list_head list;
902 * struct batadv_tt_roam_node - roaming client data
903 * @addr: mac address of the client in the roaming phase
904 * @counter: number of allowed roaming events per client within a single
905 * OGM interval (changes are committed with each OGM)
906 * @first_time: timestamp used for purging stale roaming node entries
907 * @list: list node for batadv_priv_tt::roam_list
909 struct batadv_tt_roam_node {
910 uint8_t addr[ETH_ALEN];
912 unsigned long first_time;
913 struct list_head list;
917 * struct batadv_nc_node - network coding node
918 * @list: next and prev pointer for the list handling
919 * @addr: the node's mac address
920 * @refcount: number of contexts the object is used by
921 * @rcu: struct used for freeing in an RCU-safe manner
922 * @orig_node: pointer to corresponding orig node struct
923 * @last_seen: timestamp of last ogm received from this node
925 struct batadv_nc_node {
926 struct list_head list;
927 uint8_t addr[ETH_ALEN];
930 struct batadv_orig_node *orig_node;
931 unsigned long last_seen;
935 * struct batadv_nc_path - network coding path
936 * @hash_entry: next and prev pointer for the list handling
937 * @rcu: struct used for freeing in an RCU-safe manner
938 * @refcount: number of contexts the object is used by
939 * @packet_list: list of buffered packets for this path
940 * @packet_list_lock: access lock for packet list
941 * @next_hop: next hop (destination) of path
942 * @prev_hop: previous hop (source) of path
943 * @last_valid: timestamp for last validation of path
945 struct batadv_nc_path {
946 struct hlist_node hash_entry;
949 struct list_head packet_list;
950 spinlock_t packet_list_lock; /* Protects packet_list */
951 uint8_t next_hop[ETH_ALEN];
952 uint8_t prev_hop[ETH_ALEN];
953 unsigned long last_valid;
957 * struct batadv_nc_packet - network coding packet used when coding and
959 * @list: next and prev pointer for the list handling
960 * @packet_id: crc32 checksum of skb data
961 * @timestamp: field containing the info when the packet was added to path
962 * @neigh_node: pointer to original next hop neighbor of skb
963 * @skb: skb which can be encoded or used for decoding
964 * @nc_path: pointer to path this nc packet is attached to
966 struct batadv_nc_packet {
967 struct list_head list;
969 unsigned long timestamp;
970 struct batadv_neigh_node *neigh_node;
972 struct batadv_nc_path *nc_path;
976 * batadv_skb_cb - control buffer structure used to store private data relevant
977 * to batman-adv in the skb->cb buffer in skbs.
978 * @decoded: Marks a skb as decoded, which is checked when searching for coding
979 * opportunities in network-coding.c
981 struct batadv_skb_cb {
986 * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded
987 * @list: list node for batadv_socket_client::queue_list
988 * @send_time: execution time for delayed_work (packet sending)
989 * @own: bool for locally generated packets (local OGMs are re-scheduled after
991 * @skb: bcast packet's skb buffer
992 * @packet_len: size of aggregated OGM packet inside the skb buffer
993 * @direct_link_flags: direct link flags for aggregated OGM packets
994 * @num_packets: counter for bcast packet retransmission
995 * @delayed_work: work queue callback item for packet sending
996 * @if_incoming: pointer incoming hard-iface or primary iface if locally
999 struct batadv_forw_packet {
1000 struct hlist_node list;
1001 unsigned long send_time;
1003 struct sk_buff *skb;
1004 uint16_t packet_len;
1005 uint32_t direct_link_flags;
1006 uint8_t num_packets;
1007 struct delayed_work delayed_work;
1008 struct batadv_hard_iface *if_incoming;
1012 * struct batadv_algo_ops - mesh algorithm callbacks
1013 * @list: list node for the batadv_algo_list
1014 * @name: name of the algorithm
1015 * @bat_iface_enable: init routing info when hard-interface is enabled
1016 * @bat_iface_disable: de-init routing info when hard-interface is disabled
1017 * @bat_iface_update_mac: (re-)init mac addresses of the protocol information
1018 * belonging to this hard-interface
1019 * @bat_primary_iface_set: called when primary interface is selected / changed
1020 * @bat_ogm_schedule: prepare a new outgoing OGM for the send queue
1021 * @bat_ogm_emit: send scheduled OGM
1022 * @bat_neigh_cmp: compare the metrics of two neighbors
1023 * @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or
1024 * better than neigh2 from the metric prospective
1025 * @bat_orig_print: print the originator table (optional)
1026 * @bat_orig_free: free the resources allocated by the routing algorithm for an
1028 * @bat_orig_add_if: ask the routing algorithm to apply the needed changes to
1029 * the orig_node due to a new hard-interface being added into the mesh
1030 * @bat_orig_del_if: ask the routing algorithm to apply the needed changes to
1031 * the orig_node due to an hard-interface being removed from the mesh
1033 struct batadv_algo_ops {
1034 struct hlist_node list;
1036 int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
1037 void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
1038 void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
1039 void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
1040 void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
1041 void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
1042 int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1,
1043 struct batadv_neigh_node *neigh2);
1044 bool (*bat_neigh_is_equiv_or_better)(struct batadv_neigh_node *neigh1,
1045 struct batadv_neigh_node *neigh2);
1046 /* orig_node handling API */
1047 void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq);
1048 void (*bat_orig_free)(struct batadv_orig_node *orig_node);
1049 int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
1051 int (*bat_orig_del_if)(struct batadv_orig_node *orig_node,
1052 int max_if_num, int del_if_num);
1056 * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
1057 * is used to stored ARP entries needed for the global DAT cache
1058 * @ip: the IPv4 corresponding to this DAT/ARP entry
1059 * @mac_addr: the MAC address associated to the stored IPv4
1060 * @vid: the vlan ID associated to this entry
1061 * @last_update: time in jiffies when this entry was refreshed last time
1062 * @hash_entry: hlist node for batadv_priv_dat::hash
1063 * @refcount: number of contexts the object is used
1064 * @rcu: struct used for freeing in an RCU-safe manner
1066 struct batadv_dat_entry {
1068 uint8_t mac_addr[ETH_ALEN];
1070 unsigned long last_update;
1071 struct hlist_node hash_entry;
1073 struct rcu_head rcu;
1077 * struct batadv_dat_candidate - candidate destination for DAT operations
1078 * @type: the type of the selected candidate. It can one of the following:
1079 * - BATADV_DAT_CANDIDATE_NOT_FOUND
1080 * - BATADV_DAT_CANDIDATE_ORIG
1081 * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the
1082 * corresponding originator node structure
1084 struct batadv_dat_candidate {
1086 struct batadv_orig_node *orig_node;
1090 * struct batadv_tvlv_container - container for tvlv appended to OGMs
1091 * @list: hlist node for batadv_priv_tvlv::container_list
1092 * @tvlv_hdr: tvlv header information needed to construct the tvlv
1093 * @value_len: length of the buffer following this struct which contains
1094 * the actual tvlv payload
1095 * @refcount: number of contexts the object is used
1097 struct batadv_tvlv_container {
1098 struct hlist_node list;
1099 struct batadv_tvlv_hdr tvlv_hdr;
1104 * struct batadv_tvlv_handler - handler for specific tvlv type and version
1105 * @list: hlist node for batadv_priv_tvlv::handler_list
1106 * @ogm_handler: handler callback which is given the tvlv payload to process on
1107 * incoming OGM packets
1108 * @unicast_handler: handler callback which is given the tvlv payload to process
1109 * on incoming unicast tvlv packets
1110 * @type: tvlv type this handler feels responsible for
1111 * @version: tvlv version this handler feels responsible for
1112 * @flags: tvlv handler flags
1113 * @refcount: number of contexts the object is used
1114 * @rcu: struct used for freeing in an RCU-safe manner
1116 struct batadv_tvlv_handler {
1117 struct hlist_node list;
1118 void (*ogm_handler)(struct batadv_priv *bat_priv,
1119 struct batadv_orig_node *orig,
1121 void *tvlv_value, uint16_t tvlv_value_len);
1122 int (*unicast_handler)(struct batadv_priv *bat_priv,
1123 uint8_t *src, uint8_t *dst,
1124 void *tvlv_value, uint16_t tvlv_value_len);
1129 struct rcu_head rcu;
1133 * enum batadv_tvlv_handler_flags - tvlv handler flags definitions
1134 * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function will call
1135 * this handler even if its type was not found (with no data)
1136 * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the API marks
1137 * a handler as being called, so it won't be called if the
1138 * BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set
1140 enum batadv_tvlv_handler_flags {
1141 BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1),
1142 BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
1145 #endif /* _NET_BATMAN_ADV_TYPES_H_ */