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