net/batman-adv/types.h

   1 /* Copyright (C) 2007-2012 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 #define BATADV_HEADER_LEN \
  28         (ETH_HLEN + max(sizeof(struct batadv_unicast_packet), \
  29                         sizeof(struct batadv_bcast_packet)))
  30
  31 struct batadv_hard_iface {
  32         struct list_head list;
  33         int16_t if_num;
  34         char if_status;
  35         struct net_device *net_dev;
  36         atomic_t seqno;
  37         atomic_t frag_seqno;
  38         unsigned char *packet_buff;
  39         int packet_len;
  40         struct kobject *hardif_obj;
  41         atomic_t refcount;
  42         struct packet_type batman_adv_ptype;
  43         struct net_device *soft_iface;
  44         struct rcu_head rcu;
  45 };
  46
  47 /**
  48  *      struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
  49  *      @primary_addr: hosts primary interface address
  50  *      @last_seen: when last packet from this node was received
  51  *      @bcast_seqno_reset: time when the broadcast seqno window was reset
  52  *      @batman_seqno_reset: time when the batman seqno window was reset
  53  *      @gw_flags: flags related to gateway class
  54  *      @flags: for now only VIS_SERVER flag
  55  *      @last_real_seqno: last and best known sequence number
  56  *      @last_ttl: ttl of last received packet
  57  *      @last_bcast_seqno: last broadcast sequence number received by this host
  58  *
  59  *      @candidates: how many candidates are available
  60  *      @selected: next bonding candidate
  61  */
  62 struct batadv_orig_node {
  63         uint8_t orig[ETH_ALEN];
  64         uint8_t primary_addr[ETH_ALEN];
  65         struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
  66         unsigned long *bcast_own;
  67         uint8_t *bcast_own_sum;
  68         unsigned long last_seen;
  69         unsigned long bcast_seqno_reset;
  70         unsigned long batman_seqno_reset;
  71         uint8_t gw_flags;
  72         uint8_t flags;
  73         atomic_t last_ttvn; /* last seen translation table version number */
  74         uint16_t tt_crc;
  75         unsigned char *tt_buff;
  76         int16_t tt_buff_len;
  77         spinlock_t tt_buff_lock; /* protects tt_buff */
  78         atomic_t tt_size;
  79         bool tt_initialised;
  80         /* The tt_poss_change flag is used to detect an ongoing roaming phase.
  81          * If true, then I sent a Roaming_adv to this orig_node and I have to
  82          * inspect every packet directed to it to check whether it is still
  83          * the true destination or not. This flag will be reset to false as
  84          * soon as I receive a new TTVN from this orig_node
  85          */
  86         bool tt_poss_change;
  87         uint32_t last_real_seqno;
  88         uint8_t last_ttl;
  89         DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
  90         uint32_t last_bcast_seqno;
  91         struct hlist_head neigh_list;
  92         struct list_head frag_list;
  93         spinlock_t neigh_list_lock; /* protects neigh_list and router */
  94         atomic_t refcount;
  95         struct rcu_head rcu;
  96         struct hlist_node hash_entry;
  97         struct batadv_priv *bat_priv;
  98         unsigned long last_frag_packet;
  99         /* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
 100          * neigh_node->real_bits, neigh_node->real_packet_count
 101          */
 102         spinlock_t ogm_cnt_lock;
 103         /* bcast_seqno_lock protects bcast_bits, last_bcast_seqno */
 104         spinlock_t bcast_seqno_lock;
 105         spinlock_t tt_list_lock; /* protects tt_list */
 106         atomic_t bond_candidates;
 107         struct list_head bond_list;
 108 };
 109
 110 struct batadv_gw_node {
 111         struct hlist_node list;
 112         struct batadv_orig_node *orig_node;
 113         unsigned long deleted;
 114         atomic_t refcount;
 115         struct rcu_head rcu;
 116 };
 117
 118 /*      batadv_neigh_node
 119  *      @last_seen: when last packet via this neighbor was received
 120  */
 121 struct batadv_neigh_node {
 122         struct hlist_node list;
 123         uint8_t addr[ETH_ALEN];
 124         uint8_t real_packet_count;
 125         uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
 126         uint8_t tq_index;
 127         uint8_t tq_avg;
 128         uint8_t last_ttl;
 129         struct list_head bonding_list;
 130         unsigned long last_seen;
 131         DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
 132         atomic_t refcount;
 133         struct rcu_head rcu;
 134         struct batadv_orig_node *orig_node;
 135         struct batadv_hard_iface *if_incoming;
 136         spinlock_t lq_update_lock;      /* protects: tq_recv, tq_index */
 137 };
 138
 139 #ifdef CONFIG_BATMAN_ADV_BLA
 140 struct batadv_bcast_duplist_entry {
 141         uint8_t orig[ETH_ALEN];
 142         uint16_t crc;
 143         unsigned long entrytime;
 144 };
 145 #endif
 146
 147 enum batadv_counters {
 148         BATADV_CNT_TX,
 149         BATADV_CNT_TX_BYTES,
 150         BATADV_CNT_TX_DROPPED,
 151         BATADV_CNT_RX,
 152         BATADV_CNT_RX_BYTES,
 153         BATADV_CNT_FORWARD,
 154         BATADV_CNT_FORWARD_BYTES,
 155         BATADV_CNT_MGMT_TX,
 156         BATADV_CNT_MGMT_TX_BYTES,
 157         BATADV_CNT_MGMT_RX,
 158         BATADV_CNT_MGMT_RX_BYTES,
 159         BATADV_CNT_TT_REQUEST_TX,
 160         BATADV_CNT_TT_REQUEST_RX,
 161         BATADV_CNT_TT_RESPONSE_TX,
 162         BATADV_CNT_TT_RESPONSE_RX,
 163         BATADV_CNT_TT_ROAM_ADV_TX,
 164         BATADV_CNT_TT_ROAM_ADV_RX,
 165         BATADV_CNT_NUM,
 166 };
 167
 168 /**
 169  * struct batadv_priv_tt - per mesh interface translation table data
 170  * @vn: translation table version number
 171  * @local_changes: changes registered in an originator interval
 172  * @poss_change: Detect an ongoing roaming phase. If true, then this node
 173  *  received a roaming_adv and has to inspect every packet directed to it to
 174  *  check whether it still is the true destination or not. This flag will be
 175  *  reset to false as soon as the this node's ttvn is increased
 176  * @changes_list: tracks tt local changes within an originator interval
 177  * @req_list: list of pending tt_requests
 178  * @local_crc: Checksum of the local table, recomputed before sending a new OGM
 179  */
 180 struct batadv_priv_tt {
 181         atomic_t vn;
 182         atomic_t ogm_append_cnt;
 183         atomic_t local_changes;
 184         bool poss_change;
 185         struct list_head changes_list;
 186         struct batadv_hashtable *local_hash;
 187         struct batadv_hashtable *global_hash;
 188         struct list_head req_list;
 189         struct list_head roam_list;
 190         spinlock_t changes_list_lock; /* protects changes */
 191         spinlock_t req_list_lock; /* protects req_list */
 192         spinlock_t roam_list_lock; /* protects roam_list */
 193         atomic_t local_entry_num;
 194         uint16_t local_crc;
 195         unsigned char *last_changeset;
 196         int16_t last_changeset_len;
 197         spinlock_t last_changeset_lock; /* protects last_changeset */
 198         struct delayed_work work;
 199 };
 200
 201 #ifdef CONFIG_BATMAN_ADV_BLA
 202 struct batadv_priv_bla {
 203         atomic_t num_requests; /* number of bla requests in flight */
 204         struct batadv_hashtable *claim_hash;
 205         struct batadv_hashtable *backbone_hash;
 206         struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
 207         int bcast_duplist_curr;
 208         struct batadv_bla_claim_dst claim_dest;
 209         struct delayed_work work;
 210 };
 211 #endif
 212
 213 struct batadv_priv_gw {
 214         struct hlist_head list;
 215         spinlock_t list_lock; /* protects gw_list and curr_gw */
 216         struct batadv_gw_node __rcu *curr_gw;  /* rcu protected pointer */
 217         atomic_t reselect;
 218 };
 219
 220 struct batadv_priv_vis {
 221         struct list_head send_list;
 222         struct batadv_hashtable *hash;
 223         spinlock_t hash_lock; /* protects hash */
 224         spinlock_t list_lock; /* protects info::recv_list */
 225         struct delayed_work work;
 226         struct batadv_vis_info *my_info;
 227 };
 228
 229 struct batadv_priv {
 230         atomic_t mesh_state;
 231         struct net_device_stats stats;
 232         uint64_t __percpu *bat_counters; /* Per cpu counters */
 233         atomic_t aggregated_ogms;       /* boolean */
 234         atomic_t bonding;               /* boolean */
 235         atomic_t fragmentation;         /* boolean */
 236         atomic_t ap_isolation;          /* boolean */
 237         atomic_t bridge_loop_avoidance; /* boolean */
 238         atomic_t vis_mode;              /* VIS_TYPE_* */
 239         atomic_t gw_mode;               /* GW_MODE_* */
 240         atomic_t gw_sel_class;          /* uint */
 241         atomic_t gw_bandwidth;          /* gw bandwidth */
 242         atomic_t orig_interval;         /* uint */
 243         atomic_t hop_penalty;           /* uint */
 244         atomic_t log_level;             /* uint */
 245         atomic_t bcast_seqno;
 246         atomic_t bcast_queue_left;
 247         atomic_t batman_queue_left;
 248         char num_ifaces;
 249         struct batadv_debug_log *debug_log;
 250         struct kobject *mesh_obj;
 251         struct dentry *debug_dir;
 252         struct hlist_head forw_bat_list;
 253         struct hlist_head forw_bcast_list;
 254         struct batadv_hashtable *orig_hash;
 255         spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
 256         spinlock_t forw_bcast_list_lock; /* protects  */
 257         struct delayed_work orig_work;
 258         struct batadv_hard_iface __rcu *primary_if;  /* rcu protected pointer */
 259         struct batadv_algo_ops *bat_algo_ops;
 260 #ifdef CONFIG_BATMAN_ADV_BLA
 261         struct batadv_priv_bla bla;
 262 #endif
 263         struct batadv_priv_gw gw;
 264         struct batadv_priv_tt tt;
 265         struct batadv_priv_vis vis;
 266 };
 267
 268 struct batadv_socket_client {
 269         struct list_head queue_list;
 270         unsigned int queue_len;
 271         unsigned char index;
 272         spinlock_t lock; /* protects queue_list, queue_len, index */
 273         wait_queue_head_t queue_wait;
 274         struct batadv_priv *bat_priv;
 275 };
 276
 277 struct batadv_socket_packet {
 278         struct list_head list;
 279         size_t icmp_len;
 280         struct batadv_icmp_packet_rr icmp_packet;
 281 };
 282
 283 struct batadv_tt_common_entry {
 284         uint8_t addr[ETH_ALEN];
 285         struct hlist_node hash_entry;
 286         uint16_t flags;
 287         unsigned long added_at;
 288         atomic_t refcount;
 289         struct rcu_head rcu;
 290 };
 291
 292 struct batadv_tt_local_entry {
 293         struct batadv_tt_common_entry common;
 294         unsigned long last_seen;
 295 };
 296
 297 struct batadv_tt_global_entry {
 298         struct batadv_tt_common_entry common;
 299         struct hlist_head orig_list;
 300         spinlock_t list_lock;   /* protects the list */
 301         unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
 302 };
 303
 304 struct batadv_tt_orig_list_entry {
 305         struct batadv_orig_node *orig_node;
 306         uint8_t ttvn;
 307         atomic_t refcount;
 308         struct rcu_head rcu;
 309         struct hlist_node list;
 310 };
 311
 312 #ifdef CONFIG_BATMAN_ADV_BLA
 313 struct batadv_backbone_gw {
 314         uint8_t orig[ETH_ALEN];
 315         short vid;              /* used VLAN ID */
 316         struct hlist_node hash_entry;
 317         struct batadv_priv *bat_priv;
 318         unsigned long lasttime; /* last time we heard of this backbone gw */
 319         atomic_t request_sent;
 320         atomic_t refcount;
 321         struct rcu_head rcu;
 322         uint16_t crc;           /* crc checksum over all claims */
 323 };
 324
 325 struct batadv_claim {
 326         uint8_t addr[ETH_ALEN];
 327         short vid;
 328         struct batadv_backbone_gw *backbone_gw;
 329         unsigned long lasttime; /* last time we heard of claim (locals only) */
 330         struct rcu_head rcu;
 331         atomic_t refcount;
 332         struct hlist_node hash_entry;
 333 };
 334 #endif
 335
 336 struct batadv_tt_change_node {
 337         struct list_head list;
 338         struct batadv_tt_change change;
 339 };
 340
 341 struct batadv_tt_req_node {
 342         uint8_t addr[ETH_ALEN];
 343         unsigned long issued_at;
 344         struct list_head list;
 345 };
 346
 347 struct batadv_tt_roam_node {
 348         uint8_t addr[ETH_ALEN];
 349         atomic_t counter;
 350         unsigned long first_time;
 351         struct list_head list;
 352 };
 353
 354 /*      forw_packet - structure for forw_list maintaining packets to be
 355  *                    send/forwarded
 356  */
 357 struct batadv_forw_packet {
 358         struct hlist_node list;
 359         unsigned long send_time;
 360         uint8_t own;
 361         struct sk_buff *skb;
 362         uint16_t packet_len;
 363         uint32_t direct_link_flags;
 364         uint8_t num_packets;
 365         struct delayed_work delayed_work;
 366         struct batadv_hard_iface *if_incoming;
 367 };
 368
 369 /* While scanning for vis-entries of a particular vis-originator
 370  * this list collects its interfaces to create a subgraph/cluster
 371  * out of them later
 372  */
 373 struct batadv_if_list_entry {
 374         uint8_t addr[ETH_ALEN];
 375         bool primary;
 376         struct hlist_node list;
 377 };
 378
 379 struct batadv_debug_log {
 380         char log_buff[BATADV_LOG_BUF_LEN];
 381         unsigned long log_start;
 382         unsigned long log_end;
 383         spinlock_t lock; /* protects log_buff, log_start and log_end */
 384         wait_queue_head_t queue_wait;
 385 };
 386
 387 struct batadv_frag_packet_list_entry {
 388         struct list_head list;
 389         uint16_t seqno;
 390         struct sk_buff *skb;
 391 };
 392
 393 struct batadv_vis_info {
 394         unsigned long first_seen;
 395         /* list of server-neighbors we received a vis-packet
 396          * from.  we should not reply to them.
 397          */
 398         struct list_head recv_list;
 399         struct list_head send_list;
 400         struct kref refcount;
 401         struct hlist_node hash_entry;
 402         struct batadv_priv *bat_priv;
 403         /* this packet might be part of the vis send queue. */
 404         struct sk_buff *skb_packet;
 405         /* vis_info may follow here */
 406 } __packed;
 407
 408 struct batadv_vis_info_entry {
 409         uint8_t  src[ETH_ALEN];
 410         uint8_t  dest[ETH_ALEN];
 411         uint8_t  quality;       /* quality = 0 client */
 412 } __packed;
 413
 414 struct batadv_recvlist_node {
 415         struct list_head list;
 416         uint8_t mac[ETH_ALEN];
 417 };
 418
 419 struct batadv_algo_ops {
 420         struct hlist_node list;
 421         char *name;
 422         /* init routing info when hard-interface is enabled */
 423         int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
 424         /* de-init routing info when hard-interface is disabled */
 425         void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
 426         /* (re-)init mac addresses of the protocol information
 427          * belonging to this hard-interface
 428          */
 429         void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
 430         /* called when primary interface is selected / changed */
 431         void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
 432         /* prepare a new outgoing OGM for the send queue */
 433         void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
 434         /* send scheduled OGM */
 435         void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
 436 };
 437
 438 #endif /* _NET_BATMAN_ADV_TYPES_H_ */