aboutsummaryrefslogtreecommitdiffstats
path: root/net/batman-adv/types.h
blob: dffbdffc79a455e3b2c9024d95c8b36183eb266c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
/* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */

#ifndef _NET_BATMAN_ADV_TYPES_H_
#define _NET_BATMAN_ADV_TYPES_H_

#include "packet.h"
#include "bitarray.h"
#include <linux/kernel.h>

#define BATADV_HEADER_LEN \
	(ETH_HLEN + max(sizeof(struct batadv_unicast_packet), \
			sizeof(struct batadv_bcast_packet)))

#ifdef CONFIG_BATMAN_ADV_DAT

/* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed,
 * BATADV_DAT_ADDR_MAX is changed as well.
 *
 * *Please be careful: batadv_dat_addr_t must be UNSIGNED*
 */
#define batadv_dat_addr_t uint16_t

#endif /* CONFIG_BATMAN_ADV_DAT */

/**
 * struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data
 * @ogm_buff: buffer holding the OGM packet
 * @ogm_buff_len: length of the OGM packet buffer
 * @ogm_seqno: OGM sequence number - used to identify each OGM
 */
struct batadv_hard_iface_bat_iv {
	unsigned char *ogm_buff;
	int ogm_buff_len;
	atomic_t ogm_seqno;
};

struct batadv_hard_iface {
	struct list_head list;
	int16_t if_num;
	char if_status;
	struct net_device *net_dev;
	atomic_t frag_seqno;
	struct kobject *hardif_obj;
	atomic_t refcount;
	struct packet_type batman_adv_ptype;
	struct net_device *soft_iface;
	struct rcu_head rcu;
	struct batadv_hard_iface_bat_iv bat_iv;
};

/**
 * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
 * @primary_addr: hosts primary interface address
 * @last_seen: when last packet from this node was received
 * @bcast_seqno_reset: time when the broadcast seqno window was reset
 * @batman_seqno_reset: time when the batman seqno window was reset
 * @gw_flags: flags related to gateway class
 * @flags: for now only VIS_SERVER flag
 * @last_real_seqno: last and best known sequence number
 * @last_ttl: ttl of last received packet
 * @last_bcast_seqno: last broadcast sequence number received by this host
 * @candidates: how many candidates are available
 * @selected: next bonding candidate
 */
struct batadv_orig_node {
	uint8_t orig[ETH_ALEN];
	uint8_t primary_addr[ETH_ALEN];
	struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
#ifdef CONFIG_BATMAN_ADV_DAT
	batadv_dat_addr_t dat_addr;
#endif
	unsigned long *bcast_own;
	uint8_t *bcast_own_sum;
	unsigned long last_seen;
	unsigned long bcast_seqno_reset;
	unsigned long batman_seqno_reset;
	uint8_t gw_flags;
	uint8_t flags;
	atomic_t last_ttvn; /* last seen translation table version number */
	uint16_t tt_crc;
	unsigned char *tt_buff;
	int16_t tt_buff_len;
	spinlock_t tt_buff_lock; /* protects tt_buff */
	atomic_t tt_size;
	bool tt_initialised;
	uint32_t last_real_seqno;
	uint8_t last_ttl;
	DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
	uint32_t last_bcast_seqno;
	struct hlist_head neigh_list;
	struct list_head frag_list;
	spinlock_t neigh_list_lock; /* protects neigh_list and router */
	atomic_t refcount;
	struct rcu_head rcu;
	struct hlist_node hash_entry;
	struct batadv_priv *bat_priv;
	unsigned long last_frag_packet;
	/* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
	 * neigh_node->real_bits, neigh_node->real_packet_count
	 */
	spinlock_t ogm_cnt_lock;
	/* bcast_seqno_lock protects bcast_bits, last_bcast_seqno */
	spinlock_t bcast_seqno_lock;
	atomic_t bond_candidates;
	struct list_head bond_list;
};

struct batadv_gw_node {
	struct hlist_node list;
	struct batadv_orig_node *orig_node;
	unsigned long deleted;
	atomic_t refcount;
	struct rcu_head rcu;
};

/*	batadv_neigh_node
 *	@last_seen: when last packet via this neighbor was received
 */
struct batadv_neigh_node {
	struct hlist_node list;
	uint8_t addr[ETH_ALEN];
	uint8_t real_packet_count;
	uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
	uint8_t tq_index;
	uint8_t tq_avg;
	uint8_t last_ttl;
	struct list_head bonding_list;
	unsigned long last_seen;
	DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
	atomic_t refcount;
	struct rcu_head rcu;
	struct batadv_orig_node *orig_node;
	struct batadv_hard_iface *if_incoming;
	spinlock_t lq_update_lock;	/* protects: tq_recv, tq_index */
};

#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_bcast_duplist_entry {
	uint8_t orig[ETH_ALEN];
	__be32 crc;
	unsigned long entrytime;
};
#endif

enum batadv_counters {
	BATADV_CNT_TX,
	BATADV_CNT_TX_BYTES,
	BATADV_CNT_TX_DROPPED,
	BATADV_CNT_RX,
	BATADV_CNT_RX_BYTES,
	BATADV_CNT_FORWARD,
	BATADV_CNT_FORWARD_BYTES,
	BATADV_CNT_MGMT_TX,
	BATADV_CNT_MGMT_TX_BYTES,
	BATADV_CNT_MGMT_RX,
	BATADV_CNT_MGMT_RX_BYTES,
	BATADV_CNT_TT_REQUEST_TX,
	BATADV_CNT_TT_REQUEST_RX,
	BATADV_CNT_TT_RESPONSE_TX,
	BATADV_CNT_TT_RESPONSE_RX,
	BATADV_CNT_TT_ROAM_ADV_TX,
	BATADV_CNT_TT_ROAM_ADV_RX,
#ifdef CONFIG_BATMAN_ADV_DAT
	BATADV_CNT_DAT_GET_TX,
	BATADV_CNT_DAT_GET_RX,
	BATADV_CNT_DAT_PUT_TX,
	BATADV_CNT_DAT_PUT_RX,
	BATADV_CNT_DAT_CACHED_REPLY_TX,
#endif
	BATADV_CNT_NUM,
};

/**
 * struct batadv_priv_tt - per mesh interface translation table data
 * @vn: translation table version number
 * @local_changes: changes registered in an originator interval
 * @poss_change: Detect an ongoing roaming phase. If true, then this node
 *  received a roaming_adv and has to inspect every packet directed to it to
 *  check whether it still is the true destination or not. This flag will be
 *  reset to false as soon as the this node's ttvn is increased
 * @changes_list: tracks tt local changes within an originator interval
 * @req_list: list of pending tt_requests
 * @local_crc: Checksum of the local table, recomputed before sending a new OGM
 */
struct batadv_priv_tt {
	atomic_t vn;
	atomic_t ogm_append_cnt;
	atomic_t local_changes;
	struct list_head changes_list;
	struct batadv_hashtable *local_hash;
	struct batadv_hashtable *global_hash;
	struct list_head req_list;
	struct list_head roam_list;
	spinlock_t changes_list_lock; /* protects changes */
	spinlock_t req_list_lock; /* protects req_list */
	spinlock_t roam_list_lock; /* protects roam_list */
	atomic_t local_entry_num;
	uint16_t local_crc;
	unsigned char *last_changeset;
	int16_t last_changeset_len;
	spinlock_t last_changeset_lock; /* protects last_changeset */
	struct delayed_work work;
};

#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_priv_bla {
	atomic_t num_requests; /* number of bla requests in flight */
	struct batadv_hashtable *claim_hash;
	struct batadv_hashtable *backbone_hash;
	struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
	int bcast_duplist_curr;
	/* protects bcast_duplist and bcast_duplist_curr */
	spinlock_t bcast_duplist_lock;
	struct batadv_bla_claim_dst claim_dest;
	struct delayed_work work;
};
#endif

struct batadv_priv_gw {
	struct hlist_head list;
	spinlock_t list_lock; /* protects gw_list and curr_gw */
	struct batadv_gw_node __rcu *curr_gw;  /* rcu protected pointer */
	atomic_t reselect;
};

struct batadv_priv_vis {
	struct list_head send_list;
	struct batadv_hashtable *hash;
	spinlock_t hash_lock; /* protects hash */
	spinlock_t list_lock; /* protects info::recv_list */
	struct delayed_work work;
	struct batadv_vis_info *my_info;
};

/**
 * struct batadv_priv_dat - per mesh interface DAT private data
 * @addr: node DAT address
 * @hash: hashtable representing the local ARP cache
 * @work: work queue callback item for cache purging
 */
#ifdef CONFIG_BATMAN_ADV_DAT
struct batadv_priv_dat {
	batadv_dat_addr_t addr;
	struct batadv_hashtable *hash;
	struct delayed_work work;
};
#endif

struct batadv_priv {
	atomic_t mesh_state;
	struct net_device_stats stats;
	uint64_t __percpu *bat_counters; /* Per cpu counters */
	atomic_t aggregated_ogms;	/* boolean */
	atomic_t bonding;		/* boolean */
	atomic_t fragmentation;		/* boolean */
	atomic_t ap_isolation;		/* boolean */
#ifdef CONFIG_BATMAN_ADV_BLA
	atomic_t bridge_loop_avoidance;	/* boolean */
#endif
#ifdef CONFIG_BATMAN_ADV_DAT
	atomic_t distributed_arp_table;	/* boolean */
#endif
	atomic_t vis_mode;		/* VIS_TYPE_* */
	atomic_t gw_mode;		/* GW_MODE_* */
	atomic_t gw_sel_class;		/* uint */
	atomic_t gw_bandwidth;		/* gw bandwidth */
	atomic_t orig_interval;		/* uint */
	atomic_t hop_penalty;		/* uint */
#ifdef CONFIG_BATMAN_ADV_DEBUG
	atomic_t log_level;		/* uint */
#endif
	atomic_t bcast_seqno;
	atomic_t bcast_queue_left;
	atomic_t batman_queue_left;
	char num_ifaces;
#ifdef CONFIG_BATMAN_ADV_DEBUG
	struct batadv_debug_log *debug_log;
#endif
	struct kobject *mesh_obj;
	struct dentry *debug_dir;
	struct hlist_head forw_bat_list;
	struct hlist_head forw_bcast_list;
	struct batadv_hashtable *orig_hash;
	spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
	spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
	struct delayed_work orig_work;
	struct batadv_hard_iface __rcu *primary_if;  /* rcu protected pointer */
	struct batadv_algo_ops *bat_algo_ops;
#ifdef CONFIG_BATMAN_ADV_BLA
	struct batadv_priv_bla bla;
#endif
	struct batadv_priv_gw gw;
	struct batadv_priv_tt tt;
	struct batadv_priv_vis vis;
#ifdef CONFIG_BATMAN_ADV_DAT
	struct batadv_priv_dat dat;
#endif
};

struct batadv_socket_client {
	struct list_head queue_list;
	unsigned int queue_len;
	unsigned char index;
	spinlock_t lock; /* protects queue_list, queue_len, index */
	wait_queue_head_t queue_wait;
	struct batadv_priv *bat_priv;
};

struct batadv_socket_packet {
	struct list_head list;
	size_t icmp_len;
	struct batadv_icmp_packet_rr icmp_packet;
};

struct batadv_tt_common_entry {
	uint8_t addr[ETH_ALEN];
	struct hlist_node hash_entry;
	uint16_t flags;
	unsigned long added_at;
	atomic_t refcount;
	struct rcu_head rcu;
};

struct batadv_tt_local_entry {
	struct batadv_tt_common_entry common;
	unsigned long last_seen;
};

struct batadv_tt_global_entry {
	struct batadv_tt_common_entry common;
	struct hlist_head orig_list;
	spinlock_t list_lock;	/* protects the list */
	unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
};

struct batadv_tt_orig_list_entry {
	struct batadv_orig_node *orig_node;
	uint8_t ttvn;
	atomic_t refcount;
	struct rcu_head rcu;
	struct hlist_node list;
};

#ifdef CONFIG_BATMAN_ADV_BLA
struct batadv_backbone_gw {
	uint8_t orig[ETH_ALEN];
	short vid;		/* used VLAN ID */
	struct hlist_node hash_entry;
	struct batadv_priv *bat_priv;
	unsigned long lasttime;	/* last time we heard of this backbone gw */
	atomic_t wait_periods;
	atomic_t request_sent;
	atomic_t refcount;
	struct rcu_head rcu;
	uint16_t crc;		/* crc checksum over all claims */
};

struct batadv_claim {
	uint8_t addr[ETH_ALEN];
	short vid;
	struct batadv_backbone_gw *backbone_gw;
	unsigned long lasttime;	/* last time we heard of claim (locals only) */
	struct rcu_head rcu;
	atomic_t refcount;
	struct hlist_node hash_entry;
};
#endif

struct batadv_tt_change_node {
	struct list_head list;
	struct batadv_tt_change change;
};

struct batadv_tt_req_node {
	uint8_t addr[ETH_ALEN];
	unsigned long issued_at;
	struct list_head list;
};

struct batadv_tt_roam_node {
	uint8_t addr[ETH_ALEN];
	atomic_t counter;
	unsigned long first_time;
	struct list_head list;
};

/*	forw_packet - structure for forw_list maintaining packets to be
 *	              send/forwarded
 */
struct batadv_forw_packet {
	struct hlist_node list;
	unsigned long send_time;
	uint8_t own;
	struct sk_buff *skb;
	uint16_t packet_len;
	uint32_t direct_link_flags;
	uint8_t num_packets;
	struct delayed_work delayed_work;
	struct batadv_hard_iface *if_incoming;
};

/* While scanning for vis-entries of a particular vis-originator
 * this list collects its interfaces to create a subgraph/cluster
 * out of them later
 */
struct batadv_if_list_entry {
	uint8_t addr[ETH_ALEN];
	bool primary;
	struct hlist_node list;
};

struct batadv_debug_log {
	char log_buff[BATADV_LOG_BUF_LEN];
	unsigned long log_start;
	unsigned long log_end;
	spinlock_t lock; /* protects log_buff, log_start and log_end */
	wait_queue_head_t queue_wait;
};

struct batadv_frag_packet_list_entry {
	struct list_head list;
	uint16_t seqno;
	struct sk_buff *skb;
};

struct batadv_vis_info {
	unsigned long first_seen;
	/* list of server-neighbors we received a vis-packet
	 * from.  we should not reply to them.
	 */
	struct list_head recv_list;
	struct list_head send_list;
	struct kref refcount;
	struct hlist_node hash_entry;
	struct batadv_priv *bat_priv;
	/* this packet might be part of the vis send queue. */
	struct sk_buff *skb_packet;
	/* vis_info may follow here */
} __packed;

struct batadv_vis_info_entry {
	uint8_t  src[ETH_ALEN];
	uint8_t  dest[ETH_ALEN];
	uint8_t  quality;	/* quality = 0 client */
} __packed;

struct batadv_recvlist_node {
	struct list_head list;
	uint8_t mac[ETH_ALEN];
};

struct batadv_algo_ops {
	struct hlist_node list;
	char *name;
	/* init routing info when hard-interface is enabled */
	int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
	/* de-init routing info when hard-interface is disabled */
	void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
	/* (re-)init mac addresses of the protocol information
	 * belonging to this hard-interface
	 */
	void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
	/* called when primary interface is selected / changed */
	void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
	/* prepare a new outgoing OGM for the send queue */
	void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
	/* send scheduled OGM */
	void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
};

/**
 * struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
 * is used to stored ARP entries needed for the global DAT cache
 * @ip: the IPv4 corresponding to this DAT/ARP entry
 * @mac_addr: the MAC address associated to the stored IPv4
 * @last_update: time in jiffies when this entry was refreshed last time
 * @hash_entry: hlist node for batadv_priv_dat::hash
 * @refcount: number of contexts the object is used
 * @rcu: struct used for freeing in an RCU-safe manner
 */
struct batadv_dat_entry {
	__be32 ip;
	uint8_t mac_addr[ETH_ALEN];
	unsigned long last_update;
	struct hlist_node hash_entry;
	atomic_t refcount;
	struct rcu_head rcu;
};

/**
 * struct batadv_dat_candidate - candidate destination for DAT operations
 * @type: the type of the selected candidate. It can one of the following:
 *	  - BATADV_DAT_CANDIDATE_NOT_FOUND
 *	  - BATADV_DAT_CANDIDATE_ORIG
 * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the
 *	       corresponding originator node structure
 */
struct batadv_dat_candidate {
	int type;
	struct batadv_orig_node *orig_node;
};

#endif /* _NET_BATMAN_ADV_TYPES_H_ */

Privacy Policy