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TOMOYO Linux Cross Reference
Linux/net/batman-adv/types.h

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  1 /*
  2  * Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
  3  *
  4  * Marek Lindner, Simon Wunderlich
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of version 2 of the GNU General Public
  8  * License as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful, but
 11  * WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 13  * General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program; if not, write to the Free Software
 17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 18  * 02110-1301, USA
 19  *
 20  */
 21 
 22 
 23 
 24 #ifndef _NET_BATMAN_ADV_TYPES_H_
 25 #define _NET_BATMAN_ADV_TYPES_H_
 26 
 27 #include "packet.h"
 28 #include "bitarray.h"
 29 
 30 #define BAT_HEADER_LEN (ETH_HLEN + \
 31         ((sizeof(struct unicast_packet) > sizeof(struct bcast_packet) ? \
 32          sizeof(struct unicast_packet) : \
 33          sizeof(struct bcast_packet))))
 34 
 35 
 36 struct hard_iface {
 37         struct list_head list;
 38         int16_t if_num;
 39         char if_status;
 40         struct net_device *net_dev;
 41         atomic_t seqno;
 42         atomic_t frag_seqno;
 43         unsigned char *packet_buff;
 44         int packet_len;
 45         struct kobject *hardif_obj;
 46         atomic_t refcount;
 47         struct packet_type batman_adv_ptype;
 48         struct net_device *soft_iface;
 49         struct rcu_head rcu;
 50 };
 51 
 52 /**
 53  *      orig_node - structure for orig_list maintaining nodes of mesh
 54  *      @primary_addr: hosts primary interface address
 55  *      @last_seen: when last packet from this node was received
 56  *      @bcast_seqno_reset: time when the broadcast seqno window was reset
 57  *      @batman_seqno_reset: time when the batman seqno window was reset
 58  *      @gw_flags: flags related to gateway class
 59  *      @flags: for now only VIS_SERVER flag
 60  *      @last_real_seqno: last and best known sequence number
 61  *      @last_ttl: ttl of last received packet
 62  *      @last_bcast_seqno: last broadcast sequence number received by this host
 63  *
 64  *      @candidates: how many candidates are available
 65  *      @selected: next bonding candidate
 66  */
 67 struct orig_node {
 68         uint8_t orig[ETH_ALEN];
 69         uint8_t primary_addr[ETH_ALEN];
 70         struct neigh_node __rcu *router; /* rcu protected pointer */
 71         unsigned long *bcast_own;
 72         uint8_t *bcast_own_sum;
 73         unsigned long last_seen;
 74         unsigned long bcast_seqno_reset;
 75         unsigned long batman_seqno_reset;
 76         uint8_t gw_flags;
 77         uint8_t flags;
 78         atomic_t last_ttvn; /* last seen translation table version number */
 79         uint16_t tt_crc;
 80         unsigned char *tt_buff;
 81         int16_t tt_buff_len;
 82         spinlock_t tt_buff_lock; /* protects tt_buff */
 83         atomic_t tt_size;
 84         bool tt_initialised;
 85         /* The tt_poss_change flag is used to detect an ongoing roaming phase.
 86          * If true, then I sent a Roaming_adv to this orig_node and I have to
 87          * inspect every packet directed to it to check whether it is still
 88          * the true destination or not. This flag will be reset to false as
 89          * soon as I receive a new TTVN from this orig_node */
 90         bool tt_poss_change;
 91         uint32_t last_real_seqno;
 92         uint8_t last_ttl;
 93         DECLARE_BITMAP(bcast_bits, TQ_LOCAL_WINDOW_SIZE);
 94         uint32_t last_bcast_seqno;
 95         struct hlist_head neigh_list;
 96         struct list_head frag_list;
 97         spinlock_t neigh_list_lock; /* protects neigh_list and router */
 98         atomic_t refcount;
 99         struct rcu_head rcu;
100         struct hlist_node hash_entry;
101         struct bat_priv *bat_priv;
102         unsigned long last_frag_packet;
103         /* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
104          * neigh_node->real_bits, neigh_node->real_packet_count */
105         spinlock_t ogm_cnt_lock;
106         /* bcast_seqno_lock protects bcast_bits, last_bcast_seqno */
107         spinlock_t bcast_seqno_lock;
108         spinlock_t tt_list_lock; /* protects tt_list */
109         atomic_t bond_candidates;
110         struct list_head bond_list;
111 };
112 
113 struct gw_node {
114         struct hlist_node list;
115         struct orig_node *orig_node;
116         unsigned long deleted;
117         atomic_t refcount;
118         struct rcu_head rcu;
119 };
120 
121 /**
122  *      neigh_node
123  *      @last_seen: when last packet via this neighbor was received
124  */
125 struct neigh_node {
126         struct hlist_node list;
127         uint8_t addr[ETH_ALEN];
128         uint8_t real_packet_count;
129         uint8_t tq_recv[TQ_GLOBAL_WINDOW_SIZE];
130         uint8_t tq_index;
131         uint8_t tq_avg;
132         uint8_t last_ttl;
133         struct list_head bonding_list;
134         unsigned long last_seen;
135         DECLARE_BITMAP(real_bits, TQ_LOCAL_WINDOW_SIZE);
136         atomic_t refcount;
137         struct rcu_head rcu;
138         struct orig_node *orig_node;
139         struct hard_iface *if_incoming;
140         spinlock_t lq_update_lock;      /* protects: tq_recv, tq_index */
141 };
142 
143 #ifdef CONFIG_BATMAN_ADV_BLA
144 struct bcast_duplist_entry {
145         uint8_t orig[ETH_ALEN];
146         uint16_t crc;
147         unsigned long entrytime;
148 };
149 #endif
150 
151 struct bat_priv {
152         atomic_t mesh_state;
153         struct net_device_stats stats;
154         atomic_t aggregated_ogms;       /* boolean */
155         atomic_t bonding;               /* boolean */
156         atomic_t fragmentation;         /* boolean */
157         atomic_t ap_isolation;          /* boolean */
158         atomic_t bridge_loop_avoidance; /* boolean */
159         atomic_t vis_mode;              /* VIS_TYPE_* */
160         atomic_t gw_mode;               /* GW_MODE_* */
161         atomic_t gw_sel_class;          /* uint */
162         atomic_t gw_bandwidth;          /* gw bandwidth */
163         atomic_t orig_interval;         /* uint */
164         atomic_t hop_penalty;           /* uint */
165         atomic_t log_level;             /* uint */
166         atomic_t bcast_seqno;
167         atomic_t bcast_queue_left;
168         atomic_t batman_queue_left;
169         atomic_t ttvn; /* translation table version number */
170         atomic_t tt_ogm_append_cnt;
171         atomic_t tt_local_changes; /* changes registered in a OGM interval */
172         atomic_t bla_num_requests; /* number of bla requests in flight */
173         /* The tt_poss_change flag is used to detect an ongoing roaming phase.
174          * If true, then I received a Roaming_adv and I have to inspect every
175          * packet directed to me to check whether I am still the true
176          * destination or not. This flag will be reset to false as soon as I
177          * increase my TTVN */
178         bool tt_poss_change;
179         char num_ifaces;
180         struct debug_log *debug_log;
181         struct kobject *mesh_obj;
182         struct dentry *debug_dir;
183         struct hlist_head forw_bat_list;
184         struct hlist_head forw_bcast_list;
185         struct hlist_head gw_list;
186         struct list_head tt_changes_list; /* tracks changes in a OGM int */
187         struct list_head vis_send_list;
188         struct hashtable_t *orig_hash;
189         struct hashtable_t *tt_local_hash;
190         struct hashtable_t *tt_global_hash;
191 #ifdef CONFIG_BATMAN_ADV_BLA
192         struct hashtable_t *claim_hash;
193         struct hashtable_t *backbone_hash;
194 #endif
195         struct list_head tt_req_list; /* list of pending tt_requests */
196         struct list_head tt_roam_list;
197         struct hashtable_t *vis_hash;
198 #ifdef CONFIG_BATMAN_ADV_BLA
199         struct bcast_duplist_entry bcast_duplist[DUPLIST_SIZE];
200         int bcast_duplist_curr;
201         struct bla_claim_dst claim_dest;
202 #endif
203         spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
204         spinlock_t forw_bcast_list_lock; /* protects  */
205         spinlock_t tt_changes_list_lock; /* protects tt_changes */
206         spinlock_t tt_req_list_lock; /* protects tt_req_list */
207         spinlock_t tt_roam_list_lock; /* protects tt_roam_list */
208         spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
209         spinlock_t vis_hash_lock; /* protects vis_hash */
210         spinlock_t vis_list_lock; /* protects vis_info::recv_list */
211         atomic_t num_local_tt;
212         /* Checksum of the local table, recomputed before sending a new OGM */
213         atomic_t tt_crc;
214         unsigned char *tt_buff;
215         int16_t tt_buff_len;
216         spinlock_t tt_buff_lock; /* protects tt_buff */
217         struct delayed_work tt_work;
218         struct delayed_work orig_work;
219         struct delayed_work vis_work;
220         struct delayed_work bla_work;
221         struct gw_node __rcu *curr_gw;  /* rcu protected pointer */
222         atomic_t gw_reselect;
223         struct hard_iface __rcu *primary_if;  /* rcu protected pointer */
224         struct vis_info *my_vis_info;
225         struct bat_algo_ops *bat_algo_ops;
226 };
227 
228 struct socket_client {
229         struct list_head queue_list;
230         unsigned int queue_len;
231         unsigned char index;
232         spinlock_t lock; /* protects queue_list, queue_len, index */
233         wait_queue_head_t queue_wait;
234         struct bat_priv *bat_priv;
235 };
236 
237 struct socket_packet {
238         struct list_head list;
239         size_t icmp_len;
240         struct icmp_packet_rr icmp_packet;
241 };
242 
243 struct tt_common_entry {
244         uint8_t addr[ETH_ALEN];
245         struct hlist_node hash_entry;
246         uint16_t flags;
247         atomic_t refcount;
248         struct rcu_head rcu;
249 };
250 
251 struct tt_local_entry {
252         struct tt_common_entry common;
253         unsigned long last_seen;
254 };
255 
256 struct tt_global_entry {
257         struct tt_common_entry common;
258         struct hlist_head orig_list;
259         spinlock_t list_lock;   /* protects the list */
260         unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
261 };
262 
263 struct tt_orig_list_entry {
264         struct orig_node *orig_node;
265         uint8_t ttvn;
266         struct rcu_head rcu;
267         struct hlist_node list;
268 };
269 
270 #ifdef CONFIG_BATMAN_ADV_BLA
271 struct backbone_gw {
272         uint8_t orig[ETH_ALEN];
273         short vid;              /* used VLAN ID */
274         struct hlist_node hash_entry;
275         struct bat_priv *bat_priv;
276         unsigned long lasttime; /* last time we heard of this backbone gw */
277         atomic_t request_sent;
278         atomic_t refcount;
279         struct rcu_head rcu;
280         uint16_t crc;           /* crc checksum over all claims */
281 };
282 
283 struct claim {
284         uint8_t addr[ETH_ALEN];
285         short vid;
286         struct backbone_gw *backbone_gw;
287         unsigned long lasttime; /* last time we heard of claim (locals only) */
288         struct rcu_head rcu;
289         atomic_t refcount;
290         struct hlist_node hash_entry;
291 };
292 #endif
293 
294 struct tt_change_node {
295         struct list_head list;
296         struct tt_change change;
297 };
298 
299 struct tt_req_node {
300         uint8_t addr[ETH_ALEN];
301         unsigned long issued_at;
302         struct list_head list;
303 };
304 
305 struct tt_roam_node {
306         uint8_t addr[ETH_ALEN];
307         atomic_t counter;
308         unsigned long first_time;
309         struct list_head list;
310 };
311 
312 /**
313  *      forw_packet - structure for forw_list maintaining packets to be
314  *                    send/forwarded
315  */
316 struct forw_packet {
317         struct hlist_node list;
318         unsigned long send_time;
319         uint8_t own;
320         struct sk_buff *skb;
321         uint16_t packet_len;
322         uint32_t direct_link_flags;
323         uint8_t num_packets;
324         struct delayed_work delayed_work;
325         struct hard_iface *if_incoming;
326 };
327 
328 /* While scanning for vis-entries of a particular vis-originator
329  * this list collects its interfaces to create a subgraph/cluster
330  * out of them later
331  */
332 struct if_list_entry {
333         uint8_t addr[ETH_ALEN];
334         bool primary;
335         struct hlist_node list;
336 };
337 
338 struct debug_log {
339         char log_buff[LOG_BUF_LEN];
340         unsigned long log_start;
341         unsigned long log_end;
342         spinlock_t lock; /* protects log_buff, log_start and log_end */
343         wait_queue_head_t queue_wait;
344 };
345 
346 struct frag_packet_list_entry {
347         struct list_head list;
348         uint16_t seqno;
349         struct sk_buff *skb;
350 };
351 
352 struct vis_info {
353         unsigned long first_seen;
354         /* list of server-neighbors we received a vis-packet
355          * from.  we should not reply to them. */
356         struct list_head recv_list;
357         struct list_head send_list;
358         struct kref refcount;
359         struct hlist_node hash_entry;
360         struct bat_priv *bat_priv;
361         /* this packet might be part of the vis send queue. */
362         struct sk_buff *skb_packet;
363         /* vis_info may follow here*/
364 } __packed;
365 
366 struct vis_info_entry {
367         uint8_t  src[ETH_ALEN];
368         uint8_t  dest[ETH_ALEN];
369         uint8_t  quality;       /* quality = 0 client */
370 } __packed;
371 
372 struct recvlist_node {
373         struct list_head list;
374         uint8_t mac[ETH_ALEN];
375 };
376 
377 struct bat_algo_ops {
378         struct hlist_node list;
379         char *name;
380         /* init routing info when hard-interface is enabled */
381         int (*bat_iface_enable)(struct hard_iface *hard_iface);
382         /* de-init routing info when hard-interface is disabled */
383         void (*bat_iface_disable)(struct hard_iface *hard_iface);
384         /* (re-)init mac addresses of the protocol information
385          * belonging to this hard-interface
386          */
387         void (*bat_iface_update_mac)(struct hard_iface *hard_iface);
388         /* called when primary interface is selected / changed */
389         void (*bat_primary_iface_set)(struct hard_iface *hard_iface);
390         /* prepare a new outgoing OGM for the send queue */
391         void (*bat_ogm_schedule)(struct hard_iface *hard_iface,
392                                  int tt_num_changes);
393         /* send scheduled OGM */
394         void (*bat_ogm_emit)(struct forw_packet *forw_packet);
395 };
396 
397 #endif /* _NET_BATMAN_ADV_TYPES_H_ */
398 

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