19cfc7bd6SSven Eckelmann /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: 2c6c8fea2SSven Eckelmann * 335c133a0SAntonio Quartulli * Marek Lindner, Simon Wunderlich, Antonio Quartulli 4c6c8fea2SSven Eckelmann * 5c6c8fea2SSven Eckelmann * This program is free software; you can redistribute it and/or 6c6c8fea2SSven Eckelmann * modify it under the terms of version 2 of the GNU General Public 7c6c8fea2SSven Eckelmann * License as published by the Free Software Foundation. 8c6c8fea2SSven Eckelmann * 9c6c8fea2SSven Eckelmann * This program is distributed in the hope that it will be useful, but 10c6c8fea2SSven Eckelmann * WITHOUT ANY WARRANTY; without even the implied warranty of 11c6c8fea2SSven Eckelmann * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12c6c8fea2SSven Eckelmann * General Public License for more details. 13c6c8fea2SSven Eckelmann * 14c6c8fea2SSven Eckelmann * You should have received a copy of the GNU General Public License 15c6c8fea2SSven Eckelmann * along with this program; if not, write to the Free Software 16c6c8fea2SSven Eckelmann * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 17c6c8fea2SSven Eckelmann * 02110-1301, USA 18c6c8fea2SSven Eckelmann */ 19c6c8fea2SSven Eckelmann 20c6c8fea2SSven Eckelmann #include "main.h" 21c6c8fea2SSven Eckelmann #include "translation-table.h" 22c6c8fea2SSven Eckelmann #include "soft-interface.h" 2332ae9b22SMarek Lindner #include "hard-interface.h" 24a73105b8SAntonio Quartulli #include "send.h" 25c6c8fea2SSven Eckelmann #include "hash.h" 26c6c8fea2SSven Eckelmann #include "originator.h" 27a73105b8SAntonio Quartulli #include "routing.h" 2820ff9d59SSimon Wunderlich #include "bridge_loop_avoidance.h" 29c6c8fea2SSven Eckelmann 30a73105b8SAntonio Quartulli #include <linux/crc16.h> 31a73105b8SAntonio Quartulli 3256303d34SSven Eckelmann static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, 3356303d34SSven Eckelmann struct batadv_orig_node *orig_node); 34a513088dSSven Eckelmann static void batadv_tt_purge(struct work_struct *work); 35a513088dSSven Eckelmann static void 3656303d34SSven Eckelmann batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); 3730cfd02bSAntonio Quartulli static void batadv_tt_global_del(struct batadv_priv *bat_priv, 3830cfd02bSAntonio Quartulli struct batadv_orig_node *orig_node, 3930cfd02bSAntonio Quartulli const unsigned char *addr, 4030cfd02bSAntonio Quartulli const char *message, bool roaming); 41c6c8fea2SSven Eckelmann 427aadf889SMarek Lindner /* returns 1 if they are the same mac addr */ 43a513088dSSven Eckelmann static int batadv_compare_tt(const struct hlist_node *node, const void *data2) 447aadf889SMarek Lindner { 4556303d34SSven Eckelmann const void *data1 = container_of(node, struct batadv_tt_common_entry, 46747e4221SSven Eckelmann hash_entry); 477aadf889SMarek Lindner 487aadf889SMarek Lindner return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); 497aadf889SMarek Lindner } 507aadf889SMarek Lindner 5156303d34SSven Eckelmann static void batadv_tt_start_timer(struct batadv_priv *bat_priv) 52c6c8fea2SSven Eckelmann { 53807736f6SSven Eckelmann INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); 54807736f6SSven Eckelmann queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, 55a73105b8SAntonio Quartulli msecs_to_jiffies(5000)); 56c6c8fea2SSven Eckelmann } 57c6c8fea2SSven Eckelmann 5856303d34SSven Eckelmann static struct batadv_tt_common_entry * 595bf74e9cSSven Eckelmann batadv_tt_hash_find(struct batadv_hashtable *hash, const void *data) 607aadf889SMarek Lindner { 617aadf889SMarek Lindner struct hlist_head *head; 627aadf889SMarek Lindner struct hlist_node *node; 6356303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 6456303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry_tmp = NULL; 65c90681b8SAntonio Quartulli uint32_t index; 667aadf889SMarek Lindner 677aadf889SMarek Lindner if (!hash) 687aadf889SMarek Lindner return NULL; 697aadf889SMarek Lindner 70da641193SSven Eckelmann index = batadv_choose_orig(data, hash->size); 717aadf889SMarek Lindner head = &hash->table[index]; 727aadf889SMarek Lindner 737aadf889SMarek Lindner rcu_read_lock(); 7448100bacSAntonio Quartulli hlist_for_each_entry_rcu(tt_common_entry, node, head, hash_entry) { 751eda58bfSSven Eckelmann if (!batadv_compare_eth(tt_common_entry, data)) 767aadf889SMarek Lindner continue; 777aadf889SMarek Lindner 7848100bacSAntonio Quartulli if (!atomic_inc_not_zero(&tt_common_entry->refcount)) 797683fdc1SAntonio Quartulli continue; 807683fdc1SAntonio Quartulli 8148100bacSAntonio Quartulli tt_common_entry_tmp = tt_common_entry; 827aadf889SMarek Lindner break; 837aadf889SMarek Lindner } 847aadf889SMarek Lindner rcu_read_unlock(); 857aadf889SMarek Lindner 8648100bacSAntonio Quartulli return tt_common_entry_tmp; 8748100bacSAntonio Quartulli } 8848100bacSAntonio Quartulli 8956303d34SSven Eckelmann static struct batadv_tt_local_entry * 9056303d34SSven Eckelmann batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const void *data) 9148100bacSAntonio Quartulli { 9256303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 9356303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry = NULL; 9448100bacSAntonio Quartulli 95807736f6SSven Eckelmann tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, data); 9648100bacSAntonio Quartulli if (tt_common_entry) 9748100bacSAntonio Quartulli tt_local_entry = container_of(tt_common_entry, 9856303d34SSven Eckelmann struct batadv_tt_local_entry, 9956303d34SSven Eckelmann common); 10048100bacSAntonio Quartulli return tt_local_entry; 1017aadf889SMarek Lindner } 1027aadf889SMarek Lindner 10356303d34SSven Eckelmann static struct batadv_tt_global_entry * 10456303d34SSven Eckelmann batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const void *data) 1057aadf889SMarek Lindner { 10656303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 10756303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry = NULL; 1087aadf889SMarek Lindner 109807736f6SSven Eckelmann tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, data); 11048100bacSAntonio Quartulli if (tt_common_entry) 11148100bacSAntonio Quartulli tt_global_entry = container_of(tt_common_entry, 11256303d34SSven Eckelmann struct batadv_tt_global_entry, 11356303d34SSven Eckelmann common); 11448100bacSAntonio Quartulli return tt_global_entry; 1157aadf889SMarek Lindner 1167aadf889SMarek Lindner } 1177aadf889SMarek Lindner 118a513088dSSven Eckelmann static void 11956303d34SSven Eckelmann batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) 1207683fdc1SAntonio Quartulli { 12148100bacSAntonio Quartulli if (atomic_dec_and_test(&tt_local_entry->common.refcount)) 12248100bacSAntonio Quartulli kfree_rcu(tt_local_entry, common.rcu); 1237683fdc1SAntonio Quartulli } 1247683fdc1SAntonio Quartulli 125a513088dSSven Eckelmann static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) 126531027fcSSimon Wunderlich { 12756303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 12856303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry; 129531027fcSSimon Wunderlich 13056303d34SSven Eckelmann tt_common_entry = container_of(rcu, struct batadv_tt_common_entry, rcu); 13156303d34SSven Eckelmann tt_global_entry = container_of(tt_common_entry, 13256303d34SSven Eckelmann struct batadv_tt_global_entry, common); 133531027fcSSimon Wunderlich 134531027fcSSimon Wunderlich kfree(tt_global_entry); 135531027fcSSimon Wunderlich } 136531027fcSSimon Wunderlich 137a513088dSSven Eckelmann static void 13856303d34SSven Eckelmann batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) 1397683fdc1SAntonio Quartulli { 140db08e6e5SSimon Wunderlich if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { 141a513088dSSven Eckelmann batadv_tt_global_del_orig_list(tt_global_entry); 14248100bacSAntonio Quartulli call_rcu(&tt_global_entry->common.rcu, 143a513088dSSven Eckelmann batadv_tt_global_entry_free_rcu); 1447683fdc1SAntonio Quartulli } 145db08e6e5SSimon Wunderlich } 146db08e6e5SSimon Wunderlich 147a513088dSSven Eckelmann static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) 148db08e6e5SSimon Wunderlich { 14956303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 150db08e6e5SSimon Wunderlich 15156303d34SSven Eckelmann orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); 1527d211efcSSven Eckelmann batadv_orig_node_free_ref(orig_entry->orig_node); 153db08e6e5SSimon Wunderlich kfree(orig_entry); 154db08e6e5SSimon Wunderlich } 155db08e6e5SSimon Wunderlich 156a513088dSSven Eckelmann static void 15756303d34SSven Eckelmann batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) 158db08e6e5SSimon Wunderlich { 159d657e621SAntonio Quartulli if (!atomic_dec_and_test(&orig_entry->refcount)) 160d657e621SAntonio Quartulli return; 16129cb99deSAntonio Quartulli /* to avoid race conditions, immediately decrease the tt counter */ 16229cb99deSAntonio Quartulli atomic_dec(&orig_entry->orig_node->tt_size); 163a513088dSSven Eckelmann call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); 164db08e6e5SSimon Wunderlich } 1657683fdc1SAntonio Quartulli 16656303d34SSven Eckelmann static void batadv_tt_local_event(struct batadv_priv *bat_priv, 167a513088dSSven Eckelmann const uint8_t *addr, uint8_t flags) 168a73105b8SAntonio Quartulli { 16956303d34SSven Eckelmann struct batadv_tt_change_node *tt_change_node, *entry, *safe; 1703b643de5SAntonio Quartulli bool event_removed = false; 1713b643de5SAntonio Quartulli bool del_op_requested, del_op_entry; 172a73105b8SAntonio Quartulli 173a73105b8SAntonio Quartulli tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); 174a73105b8SAntonio Quartulli 175a73105b8SAntonio Quartulli if (!tt_change_node) 176a73105b8SAntonio Quartulli return; 177a73105b8SAntonio Quartulli 178ff66c975SAntonio Quartulli tt_change_node->change.flags = flags; 179a73105b8SAntonio Quartulli memcpy(tt_change_node->change.addr, addr, ETH_ALEN); 180a73105b8SAntonio Quartulli 181acd34afaSSven Eckelmann del_op_requested = flags & BATADV_TT_CLIENT_DEL; 1823b643de5SAntonio Quartulli 1833b643de5SAntonio Quartulli /* check for ADD+DEL or DEL+ADD events */ 184807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.changes_list_lock); 185807736f6SSven Eckelmann list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, 1863b643de5SAntonio Quartulli list) { 1873b643de5SAntonio Quartulli if (!batadv_compare_eth(entry->change.addr, addr)) 1883b643de5SAntonio Quartulli continue; 1893b643de5SAntonio Quartulli 1903b643de5SAntonio Quartulli /* DEL+ADD in the same orig interval have no effect and can be 1913b643de5SAntonio Quartulli * removed to avoid silly behaviour on the receiver side. The 1923b643de5SAntonio Quartulli * other way around (ADD+DEL) can happen in case of roaming of 1933b643de5SAntonio Quartulli * a client still in the NEW state. Roaming of NEW clients is 1943b643de5SAntonio Quartulli * now possible due to automatically recognition of "temporary" 1953b643de5SAntonio Quartulli * clients 1963b643de5SAntonio Quartulli */ 197acd34afaSSven Eckelmann del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; 1983b643de5SAntonio Quartulli if (!del_op_requested && del_op_entry) 1993b643de5SAntonio Quartulli goto del; 2003b643de5SAntonio Quartulli if (del_op_requested && !del_op_entry) 2013b643de5SAntonio Quartulli goto del; 2023b643de5SAntonio Quartulli continue; 2033b643de5SAntonio Quartulli del: 2043b643de5SAntonio Quartulli list_del(&entry->list); 2053b643de5SAntonio Quartulli kfree(entry); 206155e4e12SJesper Juhl kfree(tt_change_node); 2073b643de5SAntonio Quartulli event_removed = true; 2083b643de5SAntonio Quartulli goto unlock; 2093b643de5SAntonio Quartulli } 2103b643de5SAntonio Quartulli 211a73105b8SAntonio Quartulli /* track the change in the OGMinterval list */ 212807736f6SSven Eckelmann list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); 2133b643de5SAntonio Quartulli 2143b643de5SAntonio Quartulli unlock: 215807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.changes_list_lock); 216a73105b8SAntonio Quartulli 2173b643de5SAntonio Quartulli if (event_removed) 218807736f6SSven Eckelmann atomic_dec(&bat_priv->tt.local_changes); 2193b643de5SAntonio Quartulli else 220807736f6SSven Eckelmann atomic_inc(&bat_priv->tt.local_changes); 221a73105b8SAntonio Quartulli } 222a73105b8SAntonio Quartulli 22308c36d3eSSven Eckelmann int batadv_tt_len(int changes_num) 224a73105b8SAntonio Quartulli { 22596412690SSven Eckelmann return changes_num * sizeof(struct batadv_tt_change); 226a73105b8SAntonio Quartulli } 227a73105b8SAntonio Quartulli 22856303d34SSven Eckelmann static int batadv_tt_local_init(struct batadv_priv *bat_priv) 229c6c8fea2SSven Eckelmann { 230807736f6SSven Eckelmann if (bat_priv->tt.local_hash) 2315346c35eSSven Eckelmann return 0; 232c6c8fea2SSven Eckelmann 233807736f6SSven Eckelmann bat_priv->tt.local_hash = batadv_hash_new(1024); 234c6c8fea2SSven Eckelmann 235807736f6SSven Eckelmann if (!bat_priv->tt.local_hash) 2365346c35eSSven Eckelmann return -ENOMEM; 237c6c8fea2SSven Eckelmann 2385346c35eSSven Eckelmann return 0; 239c6c8fea2SSven Eckelmann } 240c6c8fea2SSven Eckelmann 24108c36d3eSSven Eckelmann void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, 242bc279080SAntonio Quartulli int ifindex) 243c6c8fea2SSven Eckelmann { 24456303d34SSven Eckelmann struct batadv_priv *bat_priv = netdev_priv(soft_iface); 24556303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry = NULL; 24656303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry = NULL; 247db08e6e5SSimon Wunderlich struct hlist_head *head; 248db08e6e5SSimon Wunderlich struct hlist_node *node; 24956303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 25080b3f58cSSimon Wunderlich int hash_added; 251c6c8fea2SSven Eckelmann 252a513088dSSven Eckelmann tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); 253c6c8fea2SSven Eckelmann 2542dafb49dSAntonio Quartulli if (tt_local_entry) { 2552dafb49dSAntonio Quartulli tt_local_entry->last_seen = jiffies; 256acd34afaSSven Eckelmann /* possibly unset the BATADV_TT_CLIENT_PENDING flag */ 257acd34afaSSven Eckelmann tt_local_entry->common.flags &= ~BATADV_TT_CLIENT_PENDING; 2587683fdc1SAntonio Quartulli goto out; 259c6c8fea2SSven Eckelmann } 260c6c8fea2SSven Eckelmann 261704509b8SSven Eckelmann tt_local_entry = kmalloc(sizeof(*tt_local_entry), GFP_ATOMIC); 2622dafb49dSAntonio Quartulli if (!tt_local_entry) 2637683fdc1SAntonio Quartulli goto out; 264a73105b8SAntonio Quartulli 26539c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 266a73105b8SAntonio Quartulli "Creating new local tt entry: %pM (ttvn: %d)\n", addr, 267807736f6SSven Eckelmann (uint8_t)atomic_read(&bat_priv->tt.vn)); 268c6c8fea2SSven Eckelmann 26948100bacSAntonio Quartulli memcpy(tt_local_entry->common.addr, addr, ETH_ALEN); 27042d0b044SSven Eckelmann tt_local_entry->common.flags = BATADV_NO_FLAGS; 2719563877eSSven Eckelmann if (batadv_is_wifi_iface(ifindex)) 272acd34afaSSven Eckelmann tt_local_entry->common.flags |= BATADV_TT_CLIENT_WIFI; 27348100bacSAntonio Quartulli atomic_set(&tt_local_entry->common.refcount, 2); 27448100bacSAntonio Quartulli tt_local_entry->last_seen = jiffies; 27530cfd02bSAntonio Quartulli tt_local_entry->common.added_at = tt_local_entry->last_seen; 276c6c8fea2SSven Eckelmann 277c6c8fea2SSven Eckelmann /* the batman interface mac address should never be purged */ 2781eda58bfSSven Eckelmann if (batadv_compare_eth(addr, soft_iface->dev_addr)) 279acd34afaSSven Eckelmann tt_local_entry->common.flags |= BATADV_TT_CLIENT_NOPURGE; 280c6c8fea2SSven Eckelmann 281c40ed2bfSAntonio Quartulli /* The local entry has to be marked as NEW to avoid to send it in 282c40ed2bfSAntonio Quartulli * a full table response going out before the next ttvn increment 2839cfc7bd6SSven Eckelmann * (consistency check) 2849cfc7bd6SSven Eckelmann */ 285acd34afaSSven Eckelmann tt_local_entry->common.flags |= BATADV_TT_CLIENT_NEW; 286c40ed2bfSAntonio Quartulli 287807736f6SSven Eckelmann hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, 288da641193SSven Eckelmann batadv_choose_orig, 28980b3f58cSSimon Wunderlich &tt_local_entry->common, 29080b3f58cSSimon Wunderlich &tt_local_entry->common.hash_entry); 29180b3f58cSSimon Wunderlich 29280b3f58cSSimon Wunderlich if (unlikely(hash_added != 0)) { 29380b3f58cSSimon Wunderlich /* remove the reference for the hash */ 294a513088dSSven Eckelmann batadv_tt_local_entry_free_ref(tt_local_entry); 29580b3f58cSSimon Wunderlich goto out; 29680b3f58cSSimon Wunderlich } 29780b3f58cSSimon Wunderlich 298a513088dSSven Eckelmann batadv_tt_local_event(bat_priv, addr, tt_local_entry->common.flags); 299ff66c975SAntonio Quartulli 300c6c8fea2SSven Eckelmann /* remove address from global hash if present */ 301a513088dSSven Eckelmann tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); 302c6c8fea2SSven Eckelmann 303cc47f66eSAntonio Quartulli /* Check whether it is a roaming! */ 304cc47f66eSAntonio Quartulli if (tt_global_entry) { 305db08e6e5SSimon Wunderlich /* These node are probably going to update their tt table */ 306db08e6e5SSimon Wunderlich head = &tt_global_entry->orig_list; 307db08e6e5SSimon Wunderlich rcu_read_lock(); 308db08e6e5SSimon Wunderlich hlist_for_each_entry_rcu(orig_entry, node, head, list) { 309db08e6e5SSimon Wunderlich orig_entry->orig_node->tt_poss_change = true; 310db08e6e5SSimon Wunderlich 311a513088dSSven Eckelmann batadv_send_roam_adv(bat_priv, 312a513088dSSven Eckelmann tt_global_entry->common.addr, 313db08e6e5SSimon Wunderlich orig_entry->orig_node); 314db08e6e5SSimon Wunderlich } 315db08e6e5SSimon Wunderlich rcu_read_unlock(); 316db08e6e5SSimon Wunderlich /* The global entry has to be marked as ROAMING and 317db08e6e5SSimon Wunderlich * has to be kept for consistency purpose 318db08e6e5SSimon Wunderlich */ 319acd34afaSSven Eckelmann tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; 32003fc3070SAntonio Quartulli tt_global_entry->roam_at = jiffies; 3217683fdc1SAntonio Quartulli } 3227683fdc1SAntonio Quartulli out: 3237683fdc1SAntonio Quartulli if (tt_local_entry) 324a513088dSSven Eckelmann batadv_tt_local_entry_free_ref(tt_local_entry); 3257683fdc1SAntonio Quartulli if (tt_global_entry) 326a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 327c6c8fea2SSven Eckelmann } 328c6c8fea2SSven Eckelmann 329a513088dSSven Eckelmann static void batadv_tt_realloc_packet_buff(unsigned char **packet_buff, 330a513088dSSven Eckelmann int *packet_buff_len, 331a513088dSSven Eckelmann int min_packet_len, 332be9aa4c1SMarek Lindner int new_packet_len) 333c6c8fea2SSven Eckelmann { 334be9aa4c1SMarek Lindner unsigned char *new_buff; 335c6c8fea2SSven Eckelmann 336be9aa4c1SMarek Lindner new_buff = kmalloc(new_packet_len, GFP_ATOMIC); 337be9aa4c1SMarek Lindner 338be9aa4c1SMarek Lindner /* keep old buffer if kmalloc should fail */ 339be9aa4c1SMarek Lindner if (new_buff) { 340be9aa4c1SMarek Lindner memcpy(new_buff, *packet_buff, min_packet_len); 341be9aa4c1SMarek Lindner kfree(*packet_buff); 342be9aa4c1SMarek Lindner *packet_buff = new_buff; 343be9aa4c1SMarek Lindner *packet_buff_len = new_packet_len; 344be9aa4c1SMarek Lindner } 345be9aa4c1SMarek Lindner } 346be9aa4c1SMarek Lindner 34756303d34SSven Eckelmann static void batadv_tt_prepare_packet_buff(struct batadv_priv *bat_priv, 348be9aa4c1SMarek Lindner unsigned char **packet_buff, 349a513088dSSven Eckelmann int *packet_buff_len, 350a513088dSSven Eckelmann int min_packet_len) 351be9aa4c1SMarek Lindner { 35256303d34SSven Eckelmann struct batadv_hard_iface *primary_if; 353be9aa4c1SMarek Lindner int req_len; 354be9aa4c1SMarek Lindner 355e5d89254SSven Eckelmann primary_if = batadv_primary_if_get_selected(bat_priv); 356be9aa4c1SMarek Lindner 357be9aa4c1SMarek Lindner req_len = min_packet_len; 358807736f6SSven Eckelmann req_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); 359be9aa4c1SMarek Lindner 360be9aa4c1SMarek Lindner /* if we have too many changes for one packet don't send any 361be9aa4c1SMarek Lindner * and wait for the tt table request which will be fragmented 362be9aa4c1SMarek Lindner */ 363be9aa4c1SMarek Lindner if ((!primary_if) || (req_len > primary_if->soft_iface->mtu)) 364be9aa4c1SMarek Lindner req_len = min_packet_len; 365be9aa4c1SMarek Lindner 366a513088dSSven Eckelmann batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, 367be9aa4c1SMarek Lindner min_packet_len, req_len); 368be9aa4c1SMarek Lindner 369be9aa4c1SMarek Lindner if (primary_if) 370e5d89254SSven Eckelmann batadv_hardif_free_ref(primary_if); 371be9aa4c1SMarek Lindner } 372be9aa4c1SMarek Lindner 37356303d34SSven Eckelmann static int batadv_tt_changes_fill_buff(struct batadv_priv *bat_priv, 374be9aa4c1SMarek Lindner unsigned char **packet_buff, 375a513088dSSven Eckelmann int *packet_buff_len, 376a513088dSSven Eckelmann int min_packet_len) 377be9aa4c1SMarek Lindner { 37856303d34SSven Eckelmann struct batadv_tt_change_node *entry, *safe; 379be9aa4c1SMarek Lindner int count = 0, tot_changes = 0, new_len; 380be9aa4c1SMarek Lindner unsigned char *tt_buff; 381be9aa4c1SMarek Lindner 382a513088dSSven Eckelmann batadv_tt_prepare_packet_buff(bat_priv, packet_buff, 383be9aa4c1SMarek Lindner packet_buff_len, min_packet_len); 384be9aa4c1SMarek Lindner 385be9aa4c1SMarek Lindner new_len = *packet_buff_len - min_packet_len; 386be9aa4c1SMarek Lindner tt_buff = *packet_buff + min_packet_len; 387be9aa4c1SMarek Lindner 388be9aa4c1SMarek Lindner if (new_len > 0) 38908c36d3eSSven Eckelmann tot_changes = new_len / batadv_tt_len(1); 390c6c8fea2SSven Eckelmann 391807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.changes_list_lock); 392807736f6SSven Eckelmann atomic_set(&bat_priv->tt.local_changes, 0); 393c6c8fea2SSven Eckelmann 394807736f6SSven Eckelmann list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, 395a73105b8SAntonio Quartulli list) { 396a73105b8SAntonio Quartulli if (count < tot_changes) { 39708c36d3eSSven Eckelmann memcpy(tt_buff + batadv_tt_len(count), 39896412690SSven Eckelmann &entry->change, sizeof(struct batadv_tt_change)); 399c6c8fea2SSven Eckelmann count++; 400c6c8fea2SSven Eckelmann } 401a73105b8SAntonio Quartulli list_del(&entry->list); 402a73105b8SAntonio Quartulli kfree(entry); 403c6c8fea2SSven Eckelmann } 404807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.changes_list_lock); 405c6c8fea2SSven Eckelmann 406a73105b8SAntonio Quartulli /* Keep the buffer for possible tt_request */ 407807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.last_changeset_lock); 408807736f6SSven Eckelmann kfree(bat_priv->tt.last_changeset); 409807736f6SSven Eckelmann bat_priv->tt.last_changeset_len = 0; 410807736f6SSven Eckelmann bat_priv->tt.last_changeset = NULL; 411be9aa4c1SMarek Lindner /* check whether this new OGM has no changes due to size problems */ 412be9aa4c1SMarek Lindner if (new_len > 0) { 413be9aa4c1SMarek Lindner /* if kmalloc() fails we will reply with the full table 414a73105b8SAntonio Quartulli * instead of providing the diff 415a73105b8SAntonio Quartulli */ 416807736f6SSven Eckelmann bat_priv->tt.last_changeset = kmalloc(new_len, GFP_ATOMIC); 417807736f6SSven Eckelmann if (bat_priv->tt.last_changeset) { 418807736f6SSven Eckelmann memcpy(bat_priv->tt.last_changeset, tt_buff, new_len); 419807736f6SSven Eckelmann bat_priv->tt.last_changeset_len = new_len; 420a73105b8SAntonio Quartulli } 421a73105b8SAntonio Quartulli } 422807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.last_changeset_lock); 423c6c8fea2SSven Eckelmann 42408ad76ecSMarek Lindner return count; 425c6c8fea2SSven Eckelmann } 426c6c8fea2SSven Eckelmann 42708c36d3eSSven Eckelmann int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) 428c6c8fea2SSven Eckelmann { 429c6c8fea2SSven Eckelmann struct net_device *net_dev = (struct net_device *)seq->private; 43056303d34SSven Eckelmann struct batadv_priv *bat_priv = netdev_priv(net_dev); 431807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.local_hash; 43256303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 43356303d34SSven Eckelmann struct batadv_hard_iface *primary_if; 4347aadf889SMarek Lindner struct hlist_node *node; 435c6c8fea2SSven Eckelmann struct hlist_head *head; 436c90681b8SAntonio Quartulli uint32_t i; 437c6c8fea2SSven Eckelmann 43830da63a6SMarek Lindner primary_if = batadv_seq_print_text_primary_if_get(seq); 43930da63a6SMarek Lindner if (!primary_if) 44032ae9b22SMarek Lindner goto out; 441c6c8fea2SSven Eckelmann 44286ceb360SSven Eckelmann seq_printf(seq, 44386ceb360SSven Eckelmann "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", 444807736f6SSven Eckelmann net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); 445c6c8fea2SSven Eckelmann 446c6c8fea2SSven Eckelmann for (i = 0; i < hash->size; i++) { 447c6c8fea2SSven Eckelmann head = &hash->table[i]; 448c6c8fea2SSven Eckelmann 4497aadf889SMarek Lindner rcu_read_lock(); 45048100bacSAntonio Quartulli hlist_for_each_entry_rcu(tt_common_entry, node, 4517aadf889SMarek Lindner head, hash_entry) { 452d099c2c5SSimon Wunderlich seq_printf(seq, " * %pM [%c%c%c%c%c]\n", 45348100bacSAntonio Quartulli tt_common_entry->addr, 45448100bacSAntonio Quartulli (tt_common_entry->flags & 455acd34afaSSven Eckelmann BATADV_TT_CLIENT_ROAM ? 'R' : '.'), 45648100bacSAntonio Quartulli (tt_common_entry->flags & 457acd34afaSSven Eckelmann BATADV_TT_CLIENT_NOPURGE ? 'P' : '.'), 45848100bacSAntonio Quartulli (tt_common_entry->flags & 459acd34afaSSven Eckelmann BATADV_TT_CLIENT_NEW ? 'N' : '.'), 46048100bacSAntonio Quartulli (tt_common_entry->flags & 461acd34afaSSven Eckelmann BATADV_TT_CLIENT_PENDING ? 'X' : '.'), 46248100bacSAntonio Quartulli (tt_common_entry->flags & 463acd34afaSSven Eckelmann BATADV_TT_CLIENT_WIFI ? 'W' : '.')); 464c6c8fea2SSven Eckelmann } 4657aadf889SMarek Lindner rcu_read_unlock(); 466c6c8fea2SSven Eckelmann } 46732ae9b22SMarek Lindner out: 46832ae9b22SMarek Lindner if (primary_if) 469e5d89254SSven Eckelmann batadv_hardif_free_ref(primary_if); 47030da63a6SMarek Lindner return 0; 471c6c8fea2SSven Eckelmann } 472c6c8fea2SSven Eckelmann 47356303d34SSven Eckelmann static void 47456303d34SSven Eckelmann batadv_tt_local_set_pending(struct batadv_priv *bat_priv, 47556303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry, 476c566dbbeSAntonio Quartulli uint16_t flags, const char *message) 477c6c8fea2SSven Eckelmann { 478a513088dSSven Eckelmann batadv_tt_local_event(bat_priv, tt_local_entry->common.addr, 47948100bacSAntonio Quartulli tt_local_entry->common.flags | flags); 480c6c8fea2SSven Eckelmann 481015758d0SAntonio Quartulli /* The local client has to be marked as "pending to be removed" but has 482015758d0SAntonio Quartulli * to be kept in the table in order to send it in a full table 4839cfc7bd6SSven Eckelmann * response issued before the net ttvn increment (consistency check) 4849cfc7bd6SSven Eckelmann */ 485acd34afaSSven Eckelmann tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; 486c566dbbeSAntonio Quartulli 48739c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 48886ceb360SSven Eckelmann "Local tt entry (%pM) pending to be removed: %s\n", 48986ceb360SSven Eckelmann tt_local_entry->common.addr, message); 490c6c8fea2SSven Eckelmann } 491c6c8fea2SSven Eckelmann 4927f91d06cSAntonio Quartulli /** 4937f91d06cSAntonio Quartulli * batadv_tt_local_remove - logically remove an entry from the local table 4947f91d06cSAntonio Quartulli * @bat_priv: the bat priv with all the soft interface information 4957f91d06cSAntonio Quartulli * @addr: the MAC address of the client to remove 4967f91d06cSAntonio Quartulli * @message: message to append to the log on deletion 4977f91d06cSAntonio Quartulli * @roaming: true if the deletion is due to a roaming event 4987f91d06cSAntonio Quartulli * 4997f91d06cSAntonio Quartulli * Returns the flags assigned to the local entry before being deleted 5007f91d06cSAntonio Quartulli */ 5017f91d06cSAntonio Quartulli uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, 5027f91d06cSAntonio Quartulli const uint8_t *addr, const char *message, 5037f91d06cSAntonio Quartulli bool roaming) 504c6c8fea2SSven Eckelmann { 50556303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry = NULL; 5067f91d06cSAntonio Quartulli uint16_t flags, curr_flags = BATADV_NO_FLAGS; 507c6c8fea2SSven Eckelmann 508a513088dSSven Eckelmann tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); 5097683fdc1SAntonio Quartulli if (!tt_local_entry) 5107683fdc1SAntonio Quartulli goto out; 5117683fdc1SAntonio Quartulli 5127f91d06cSAntonio Quartulli curr_flags = tt_local_entry->common.flags; 5137f91d06cSAntonio Quartulli 514acd34afaSSven Eckelmann flags = BATADV_TT_CLIENT_DEL; 51542d0b044SSven Eckelmann if (roaming) 516acd34afaSSven Eckelmann flags |= BATADV_TT_CLIENT_ROAM; 51742d0b044SSven Eckelmann 51842d0b044SSven Eckelmann batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, message); 5197f91d06cSAntonio Quartulli 5207683fdc1SAntonio Quartulli out: 5217683fdc1SAntonio Quartulli if (tt_local_entry) 522a513088dSSven Eckelmann batadv_tt_local_entry_free_ref(tt_local_entry); 5237f91d06cSAntonio Quartulli 5247f91d06cSAntonio Quartulli return curr_flags; 525c6c8fea2SSven Eckelmann } 526c6c8fea2SSven Eckelmann 52756303d34SSven Eckelmann static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, 528acd34afaSSven Eckelmann struct hlist_head *head) 529c6c8fea2SSven Eckelmann { 53056303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry; 53156303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 5327aadf889SMarek Lindner struct hlist_node *node, *node_tmp; 533acd34afaSSven Eckelmann 534acd34afaSSven Eckelmann hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, head, 535acd34afaSSven Eckelmann hash_entry) { 536acd34afaSSven Eckelmann tt_local_entry = container_of(tt_common_entry, 53756303d34SSven Eckelmann struct batadv_tt_local_entry, 53856303d34SSven Eckelmann common); 539acd34afaSSven Eckelmann if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) 540acd34afaSSven Eckelmann continue; 541acd34afaSSven Eckelmann 542acd34afaSSven Eckelmann /* entry already marked for deletion */ 543acd34afaSSven Eckelmann if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) 544acd34afaSSven Eckelmann continue; 545acd34afaSSven Eckelmann 546acd34afaSSven Eckelmann if (!batadv_has_timed_out(tt_local_entry->last_seen, 547acd34afaSSven Eckelmann BATADV_TT_LOCAL_TIMEOUT)) 548acd34afaSSven Eckelmann continue; 549acd34afaSSven Eckelmann 550acd34afaSSven Eckelmann batadv_tt_local_set_pending(bat_priv, tt_local_entry, 551acd34afaSSven Eckelmann BATADV_TT_CLIENT_DEL, "timed out"); 552acd34afaSSven Eckelmann } 553acd34afaSSven Eckelmann } 554acd34afaSSven Eckelmann 55556303d34SSven Eckelmann static void batadv_tt_local_purge(struct batadv_priv *bat_priv) 556acd34afaSSven Eckelmann { 557807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.local_hash; 558c6c8fea2SSven Eckelmann struct hlist_head *head; 5597683fdc1SAntonio Quartulli spinlock_t *list_lock; /* protects write access to the hash lists */ 560c90681b8SAntonio Quartulli uint32_t i; 561c6c8fea2SSven Eckelmann 562c6c8fea2SSven Eckelmann for (i = 0; i < hash->size; i++) { 563c6c8fea2SSven Eckelmann head = &hash->table[i]; 5647683fdc1SAntonio Quartulli list_lock = &hash->list_locks[i]; 565c6c8fea2SSven Eckelmann 5667683fdc1SAntonio Quartulli spin_lock_bh(list_lock); 567acd34afaSSven Eckelmann batadv_tt_local_purge_list(bat_priv, head); 5687683fdc1SAntonio Quartulli spin_unlock_bh(list_lock); 569c6c8fea2SSven Eckelmann } 570c6c8fea2SSven Eckelmann 571c6c8fea2SSven Eckelmann } 572c6c8fea2SSven Eckelmann 57356303d34SSven Eckelmann static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) 574c6c8fea2SSven Eckelmann { 5755bf74e9cSSven Eckelmann struct batadv_hashtable *hash; 576a73105b8SAntonio Quartulli spinlock_t *list_lock; /* protects write access to the hash lists */ 57756303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 57856303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local; 5797683fdc1SAntonio Quartulli struct hlist_node *node, *node_tmp; 5807683fdc1SAntonio Quartulli struct hlist_head *head; 581c90681b8SAntonio Quartulli uint32_t i; 582a73105b8SAntonio Quartulli 583807736f6SSven Eckelmann if (!bat_priv->tt.local_hash) 584c6c8fea2SSven Eckelmann return; 585c6c8fea2SSven Eckelmann 586807736f6SSven Eckelmann hash = bat_priv->tt.local_hash; 587a73105b8SAntonio Quartulli 588a73105b8SAntonio Quartulli for (i = 0; i < hash->size; i++) { 589a73105b8SAntonio Quartulli head = &hash->table[i]; 590a73105b8SAntonio Quartulli list_lock = &hash->list_locks[i]; 591a73105b8SAntonio Quartulli 592a73105b8SAntonio Quartulli spin_lock_bh(list_lock); 59348100bacSAntonio Quartulli hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, 594a73105b8SAntonio Quartulli head, hash_entry) { 595a73105b8SAntonio Quartulli hlist_del_rcu(node); 59656303d34SSven Eckelmann tt_local = container_of(tt_common_entry, 59756303d34SSven Eckelmann struct batadv_tt_local_entry, 59848100bacSAntonio Quartulli common); 59956303d34SSven Eckelmann batadv_tt_local_entry_free_ref(tt_local); 600a73105b8SAntonio Quartulli } 601a73105b8SAntonio Quartulli spin_unlock_bh(list_lock); 602a73105b8SAntonio Quartulli } 603a73105b8SAntonio Quartulli 6041a8eaf07SSven Eckelmann batadv_hash_destroy(hash); 605a73105b8SAntonio Quartulli 606807736f6SSven Eckelmann bat_priv->tt.local_hash = NULL; 607c6c8fea2SSven Eckelmann } 608c6c8fea2SSven Eckelmann 60956303d34SSven Eckelmann static int batadv_tt_global_init(struct batadv_priv *bat_priv) 610c6c8fea2SSven Eckelmann { 611807736f6SSven Eckelmann if (bat_priv->tt.global_hash) 6125346c35eSSven Eckelmann return 0; 613c6c8fea2SSven Eckelmann 614807736f6SSven Eckelmann bat_priv->tt.global_hash = batadv_hash_new(1024); 615c6c8fea2SSven Eckelmann 616807736f6SSven Eckelmann if (!bat_priv->tt.global_hash) 6175346c35eSSven Eckelmann return -ENOMEM; 618c6c8fea2SSven Eckelmann 6195346c35eSSven Eckelmann return 0; 620c6c8fea2SSven Eckelmann } 621c6c8fea2SSven Eckelmann 62256303d34SSven Eckelmann static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) 623a73105b8SAntonio Quartulli { 62456303d34SSven Eckelmann struct batadv_tt_change_node *entry, *safe; 625a73105b8SAntonio Quartulli 626807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.changes_list_lock); 627a73105b8SAntonio Quartulli 628807736f6SSven Eckelmann list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, 629a73105b8SAntonio Quartulli list) { 630a73105b8SAntonio Quartulli list_del(&entry->list); 631a73105b8SAntonio Quartulli kfree(entry); 632a73105b8SAntonio Quartulli } 633a73105b8SAntonio Quartulli 634807736f6SSven Eckelmann atomic_set(&bat_priv->tt.local_changes, 0); 635807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.changes_list_lock); 636a73105b8SAntonio Quartulli } 637a73105b8SAntonio Quartulli 638d657e621SAntonio Quartulli /* retrieves the orig_tt_list_entry belonging to orig_node from the 639d657e621SAntonio Quartulli * batadv_tt_global_entry list 640d657e621SAntonio Quartulli * 641d657e621SAntonio Quartulli * returns it with an increased refcounter, NULL if not found 642d657e621SAntonio Quartulli */ 643d657e621SAntonio Quartulli static struct batadv_tt_orig_list_entry * 644d657e621SAntonio Quartulli batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, 645d657e621SAntonio Quartulli const struct batadv_orig_node *orig_node) 646d657e621SAntonio Quartulli { 647d657e621SAntonio Quartulli struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; 648d657e621SAntonio Quartulli const struct hlist_head *head; 649d657e621SAntonio Quartulli struct hlist_node *node; 650d657e621SAntonio Quartulli 651d657e621SAntonio Quartulli rcu_read_lock(); 652d657e621SAntonio Quartulli head = &entry->orig_list; 653d657e621SAntonio Quartulli hlist_for_each_entry_rcu(tmp_orig_entry, node, head, list) { 654d657e621SAntonio Quartulli if (tmp_orig_entry->orig_node != orig_node) 655d657e621SAntonio Quartulli continue; 656d657e621SAntonio Quartulli if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) 657d657e621SAntonio Quartulli continue; 658d657e621SAntonio Quartulli 659d657e621SAntonio Quartulli orig_entry = tmp_orig_entry; 660d657e621SAntonio Quartulli break; 661d657e621SAntonio Quartulli } 662d657e621SAntonio Quartulli rcu_read_unlock(); 663d657e621SAntonio Quartulli 664d657e621SAntonio Quartulli return orig_entry; 665d657e621SAntonio Quartulli } 666d657e621SAntonio Quartulli 667db08e6e5SSimon Wunderlich /* find out if an orig_node is already in the list of a tt_global_entry. 668d657e621SAntonio Quartulli * returns true if found, false otherwise 669db08e6e5SSimon Wunderlich */ 67056303d34SSven Eckelmann static bool 67156303d34SSven Eckelmann batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, 67256303d34SSven Eckelmann const struct batadv_orig_node *orig_node) 673db08e6e5SSimon Wunderlich { 674d657e621SAntonio Quartulli struct batadv_tt_orig_list_entry *orig_entry; 675db08e6e5SSimon Wunderlich bool found = false; 676db08e6e5SSimon Wunderlich 677d657e621SAntonio Quartulli orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); 678d657e621SAntonio Quartulli if (orig_entry) { 679db08e6e5SSimon Wunderlich found = true; 680d657e621SAntonio Quartulli batadv_tt_orig_list_entry_free_ref(orig_entry); 681db08e6e5SSimon Wunderlich } 682d657e621SAntonio Quartulli 683db08e6e5SSimon Wunderlich return found; 684db08e6e5SSimon Wunderlich } 685db08e6e5SSimon Wunderlich 686a513088dSSven Eckelmann static void 687d657e621SAntonio Quartulli batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, 68856303d34SSven Eckelmann struct batadv_orig_node *orig_node, int ttvn) 689db08e6e5SSimon Wunderlich { 69056303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 691db08e6e5SSimon Wunderlich 692d657e621SAntonio Quartulli orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); 69330cfd02bSAntonio Quartulli if (orig_entry) { 69430cfd02bSAntonio Quartulli /* refresh the ttvn: the current value could be a bogus one that 69530cfd02bSAntonio Quartulli * was added during a "temporary client detection" 69630cfd02bSAntonio Quartulli */ 69730cfd02bSAntonio Quartulli orig_entry->ttvn = ttvn; 698d657e621SAntonio Quartulli goto out; 69930cfd02bSAntonio Quartulli } 700d657e621SAntonio Quartulli 701db08e6e5SSimon Wunderlich orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); 702db08e6e5SSimon Wunderlich if (!orig_entry) 703d657e621SAntonio Quartulli goto out; 704db08e6e5SSimon Wunderlich 705db08e6e5SSimon Wunderlich INIT_HLIST_NODE(&orig_entry->list); 706db08e6e5SSimon Wunderlich atomic_inc(&orig_node->refcount); 707db08e6e5SSimon Wunderlich atomic_inc(&orig_node->tt_size); 708db08e6e5SSimon Wunderlich orig_entry->orig_node = orig_node; 709db08e6e5SSimon Wunderlich orig_entry->ttvn = ttvn; 710d657e621SAntonio Quartulli atomic_set(&orig_entry->refcount, 2); 711db08e6e5SSimon Wunderlich 712d657e621SAntonio Quartulli spin_lock_bh(&tt_global->list_lock); 713db08e6e5SSimon Wunderlich hlist_add_head_rcu(&orig_entry->list, 714d657e621SAntonio Quartulli &tt_global->orig_list); 715d657e621SAntonio Quartulli spin_unlock_bh(&tt_global->list_lock); 716d657e621SAntonio Quartulli out: 717d657e621SAntonio Quartulli if (orig_entry) 718d657e621SAntonio Quartulli batadv_tt_orig_list_entry_free_ref(orig_entry); 719db08e6e5SSimon Wunderlich } 720db08e6e5SSimon Wunderlich 721a73105b8SAntonio Quartulli /* caller must hold orig_node refcount */ 72256303d34SSven Eckelmann int batadv_tt_global_add(struct batadv_priv *bat_priv, 72356303d34SSven Eckelmann struct batadv_orig_node *orig_node, 724d4f44692SAntonio Quartulli const unsigned char *tt_addr, uint8_t flags, 725d4f44692SAntonio Quartulli uint8_t ttvn) 726c6c8fea2SSven Eckelmann { 72756303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry = NULL; 7287683fdc1SAntonio Quartulli int ret = 0; 72980b3f58cSSimon Wunderlich int hash_added; 73056303d34SSven Eckelmann struct batadv_tt_common_entry *common; 7317f91d06cSAntonio Quartulli uint16_t local_flags; 732c6c8fea2SSven Eckelmann 733a513088dSSven Eckelmann tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); 734c6c8fea2SSven Eckelmann 7352dafb49dSAntonio Quartulli if (!tt_global_entry) { 736d4f44692SAntonio Quartulli tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); 7372dafb49dSAntonio Quartulli if (!tt_global_entry) 7387683fdc1SAntonio Quartulli goto out; 7397683fdc1SAntonio Quartulli 740c0a55929SSven Eckelmann common = &tt_global_entry->common; 741c0a55929SSven Eckelmann memcpy(common->addr, tt_addr, ETH_ALEN); 742db08e6e5SSimon Wunderlich 743d4f44692SAntonio Quartulli common->flags = flags; 744cc47f66eSAntonio Quartulli tt_global_entry->roam_at = 0; 745fdf79320SAntonio Quartulli /* node must store current time in case of roaming. This is 746fdf79320SAntonio Quartulli * needed to purge this entry out on timeout (if nobody claims 747fdf79320SAntonio Quartulli * it) 748fdf79320SAntonio Quartulli */ 749fdf79320SAntonio Quartulli if (flags & BATADV_TT_CLIENT_ROAM) 750fdf79320SAntonio Quartulli tt_global_entry->roam_at = jiffies; 751c0a55929SSven Eckelmann atomic_set(&common->refcount, 2); 75230cfd02bSAntonio Quartulli common->added_at = jiffies; 753db08e6e5SSimon Wunderlich 754db08e6e5SSimon Wunderlich INIT_HLIST_HEAD(&tt_global_entry->orig_list); 755db08e6e5SSimon Wunderlich spin_lock_init(&tt_global_entry->list_lock); 7567683fdc1SAntonio Quartulli 757807736f6SSven Eckelmann hash_added = batadv_hash_add(bat_priv->tt.global_hash, 758a513088dSSven Eckelmann batadv_compare_tt, 759a513088dSSven Eckelmann batadv_choose_orig, common, 760a513088dSSven Eckelmann &common->hash_entry); 76180b3f58cSSimon Wunderlich 76280b3f58cSSimon Wunderlich if (unlikely(hash_added != 0)) { 76380b3f58cSSimon Wunderlich /* remove the reference for the hash */ 764a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 76580b3f58cSSimon Wunderlich goto out_remove; 76680b3f58cSSimon Wunderlich } 767a73105b8SAntonio Quartulli } else { 76830cfd02bSAntonio Quartulli /* If there is already a global entry, we can use this one for 76930cfd02bSAntonio Quartulli * our processing. 77030cfd02bSAntonio Quartulli * But if we are trying to add a temporary client we can exit 77130cfd02bSAntonio Quartulli * directly because the temporary information should never 77230cfd02bSAntonio Quartulli * override any already known client state (whatever it is) 77330cfd02bSAntonio Quartulli */ 77430cfd02bSAntonio Quartulli if (flags & BATADV_TT_CLIENT_TEMP) 77530cfd02bSAntonio Quartulli goto out; 77630cfd02bSAntonio Quartulli 77730cfd02bSAntonio Quartulli /* if the client was temporary added before receiving the first 77830cfd02bSAntonio Quartulli * OGM announcing it, we have to clear the TEMP flag 77930cfd02bSAntonio Quartulli */ 78030cfd02bSAntonio Quartulli tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_TEMP; 781db08e6e5SSimon Wunderlich 782acd34afaSSven Eckelmann /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only 783acd34afaSSven Eckelmann * one originator left in the list and we previously received a 784db08e6e5SSimon Wunderlich * delete + roaming change for this originator. 785db08e6e5SSimon Wunderlich * 786db08e6e5SSimon Wunderlich * We should first delete the old originator before adding the 787db08e6e5SSimon Wunderlich * new one. 788db08e6e5SSimon Wunderlich */ 789acd34afaSSven Eckelmann if (tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM) { 790a513088dSSven Eckelmann batadv_tt_global_del_orig_list(tt_global_entry); 791acd34afaSSven Eckelmann tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; 792cc47f66eSAntonio Quartulli tt_global_entry->roam_at = 0; 793c6c8fea2SSven Eckelmann } 794db08e6e5SSimon Wunderlich } 79530cfd02bSAntonio Quartulli /* add the new orig_entry (if needed) or update it */ 796d657e621SAntonio Quartulli batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); 797db08e6e5SSimon Wunderlich 79839c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 799a73105b8SAntonio Quartulli "Creating new global tt entry: %pM (via %pM)\n", 80048100bacSAntonio Quartulli tt_global_entry->common.addr, orig_node->orig); 801c10dba05SAntonio Quartulli ret = 1; 802a73105b8SAntonio Quartulli 80380b3f58cSSimon Wunderlich out_remove: 8047f91d06cSAntonio Quartulli 805c6c8fea2SSven Eckelmann /* remove address from local hash if present */ 8067f91d06cSAntonio Quartulli local_flags = batadv_tt_local_remove(bat_priv, tt_addr, 807acd34afaSSven Eckelmann "global tt received", 808acd34afaSSven Eckelmann flags & BATADV_TT_CLIENT_ROAM); 8097f91d06cSAntonio Quartulli tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; 8107f91d06cSAntonio Quartulli 8117683fdc1SAntonio Quartulli out: 8127683fdc1SAntonio Quartulli if (tt_global_entry) 813a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 8147683fdc1SAntonio Quartulli return ret; 815c6c8fea2SSven Eckelmann } 816c6c8fea2SSven Eckelmann 817db08e6e5SSimon Wunderlich /* print all orig nodes who announce the address for this global entry. 818db08e6e5SSimon Wunderlich * it is assumed that the caller holds rcu_read_lock(); 819db08e6e5SSimon Wunderlich */ 820a513088dSSven Eckelmann static void 82156303d34SSven Eckelmann batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, 822db08e6e5SSimon Wunderlich struct seq_file *seq) 823db08e6e5SSimon Wunderlich { 824db08e6e5SSimon Wunderlich struct hlist_head *head; 825db08e6e5SSimon Wunderlich struct hlist_node *node; 82656303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 82756303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 828db08e6e5SSimon Wunderlich uint16_t flags; 829db08e6e5SSimon Wunderlich uint8_t last_ttvn; 830db08e6e5SSimon Wunderlich 831db08e6e5SSimon Wunderlich tt_common_entry = &tt_global_entry->common; 832db08e6e5SSimon Wunderlich 833db08e6e5SSimon Wunderlich head = &tt_global_entry->orig_list; 834db08e6e5SSimon Wunderlich 835db08e6e5SSimon Wunderlich hlist_for_each_entry_rcu(orig_entry, node, head, list) { 836db08e6e5SSimon Wunderlich flags = tt_common_entry->flags; 837db08e6e5SSimon Wunderlich last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); 83830cfd02bSAntonio Quartulli seq_printf(seq, " * %pM (%3u) via %pM (%3u) [%c%c%c]\n", 839db08e6e5SSimon Wunderlich tt_global_entry->common.addr, orig_entry->ttvn, 840db08e6e5SSimon Wunderlich orig_entry->orig_node->orig, last_ttvn, 841acd34afaSSven Eckelmann (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), 84230cfd02bSAntonio Quartulli (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), 84330cfd02bSAntonio Quartulli (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); 844db08e6e5SSimon Wunderlich } 845db08e6e5SSimon Wunderlich } 846db08e6e5SSimon Wunderlich 84708c36d3eSSven Eckelmann int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) 848c6c8fea2SSven Eckelmann { 849c6c8fea2SSven Eckelmann struct net_device *net_dev = (struct net_device *)seq->private; 85056303d34SSven Eckelmann struct batadv_priv *bat_priv = netdev_priv(net_dev); 851807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.global_hash; 85256303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 85356303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global; 85456303d34SSven Eckelmann struct batadv_hard_iface *primary_if; 8557aadf889SMarek Lindner struct hlist_node *node; 856c6c8fea2SSven Eckelmann struct hlist_head *head; 857c90681b8SAntonio Quartulli uint32_t i; 858c6c8fea2SSven Eckelmann 85930da63a6SMarek Lindner primary_if = batadv_seq_print_text_primary_if_get(seq); 86030da63a6SMarek Lindner if (!primary_if) 86132ae9b22SMarek Lindner goto out; 862c6c8fea2SSven Eckelmann 8632dafb49dSAntonio Quartulli seq_printf(seq, 8642dafb49dSAntonio Quartulli "Globally announced TT entries received via the mesh %s\n", 865c6c8fea2SSven Eckelmann net_dev->name); 866df6edb9eSAntonio Quartulli seq_printf(seq, " %-13s %s %-15s %s %s\n", 867df6edb9eSAntonio Quartulli "Client", "(TTVN)", "Originator", "(Curr TTVN)", "Flags"); 868c6c8fea2SSven Eckelmann 869c6c8fea2SSven Eckelmann for (i = 0; i < hash->size; i++) { 870c6c8fea2SSven Eckelmann head = &hash->table[i]; 871c6c8fea2SSven Eckelmann 8727aadf889SMarek Lindner rcu_read_lock(); 87348100bacSAntonio Quartulli hlist_for_each_entry_rcu(tt_common_entry, node, 8747aadf889SMarek Lindner head, hash_entry) { 87556303d34SSven Eckelmann tt_global = container_of(tt_common_entry, 87656303d34SSven Eckelmann struct batadv_tt_global_entry, 87748100bacSAntonio Quartulli common); 87856303d34SSven Eckelmann batadv_tt_global_print_entry(tt_global, seq); 879c6c8fea2SSven Eckelmann } 8807aadf889SMarek Lindner rcu_read_unlock(); 881c6c8fea2SSven Eckelmann } 88232ae9b22SMarek Lindner out: 88332ae9b22SMarek Lindner if (primary_if) 884e5d89254SSven Eckelmann batadv_hardif_free_ref(primary_if); 88530da63a6SMarek Lindner return 0; 886c6c8fea2SSven Eckelmann } 887c6c8fea2SSven Eckelmann 888db08e6e5SSimon Wunderlich /* deletes the orig list of a tt_global_entry */ 889a513088dSSven Eckelmann static void 89056303d34SSven Eckelmann batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) 891db08e6e5SSimon Wunderlich { 892db08e6e5SSimon Wunderlich struct hlist_head *head; 893db08e6e5SSimon Wunderlich struct hlist_node *node, *safe; 89456303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 895db08e6e5SSimon Wunderlich 896db08e6e5SSimon Wunderlich spin_lock_bh(&tt_global_entry->list_lock); 897db08e6e5SSimon Wunderlich head = &tt_global_entry->orig_list; 898db08e6e5SSimon Wunderlich hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { 899db08e6e5SSimon Wunderlich hlist_del_rcu(node); 900a513088dSSven Eckelmann batadv_tt_orig_list_entry_free_ref(orig_entry); 901db08e6e5SSimon Wunderlich } 902db08e6e5SSimon Wunderlich spin_unlock_bh(&tt_global_entry->list_lock); 903db08e6e5SSimon Wunderlich 904db08e6e5SSimon Wunderlich } 905db08e6e5SSimon Wunderlich 906a513088dSSven Eckelmann static void 90756303d34SSven Eckelmann batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, 90856303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry, 90956303d34SSven Eckelmann struct batadv_orig_node *orig_node, 910db08e6e5SSimon Wunderlich const char *message) 911db08e6e5SSimon Wunderlich { 912db08e6e5SSimon Wunderlich struct hlist_head *head; 913db08e6e5SSimon Wunderlich struct hlist_node *node, *safe; 91456303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 915db08e6e5SSimon Wunderlich 916db08e6e5SSimon Wunderlich spin_lock_bh(&tt_global_entry->list_lock); 917db08e6e5SSimon Wunderlich head = &tt_global_entry->orig_list; 918db08e6e5SSimon Wunderlich hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { 919db08e6e5SSimon Wunderlich if (orig_entry->orig_node == orig_node) { 92039c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 921db08e6e5SSimon Wunderlich "Deleting %pM from global tt entry %pM: %s\n", 9221eda58bfSSven Eckelmann orig_node->orig, 9231eda58bfSSven Eckelmann tt_global_entry->common.addr, message); 924db08e6e5SSimon Wunderlich hlist_del_rcu(node); 925a513088dSSven Eckelmann batadv_tt_orig_list_entry_free_ref(orig_entry); 926db08e6e5SSimon Wunderlich } 927db08e6e5SSimon Wunderlich } 928db08e6e5SSimon Wunderlich spin_unlock_bh(&tt_global_entry->list_lock); 929db08e6e5SSimon Wunderlich } 930db08e6e5SSimon Wunderlich 93156303d34SSven Eckelmann static void 93256303d34SSven Eckelmann batadv_tt_global_del_struct(struct batadv_priv *bat_priv, 93356303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry, 934747e4221SSven Eckelmann const char *message) 935c6c8fea2SSven Eckelmann { 93639c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 93739c75a51SSven Eckelmann "Deleting global tt entry %pM: %s\n", 938db08e6e5SSimon Wunderlich tt_global_entry->common.addr, message); 9397683fdc1SAntonio Quartulli 940807736f6SSven Eckelmann batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, 941da641193SSven Eckelmann batadv_choose_orig, tt_global_entry->common.addr); 942a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 943db08e6e5SSimon Wunderlich 944c6c8fea2SSven Eckelmann } 945c6c8fea2SSven Eckelmann 946db08e6e5SSimon Wunderlich /* If the client is to be deleted, we check if it is the last origantor entry 947acd34afaSSven Eckelmann * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the 948acd34afaSSven Eckelmann * timer, otherwise we simply remove the originator scheduled for deletion. 949db08e6e5SSimon Wunderlich */ 950a513088dSSven Eckelmann static void 95156303d34SSven Eckelmann batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, 95256303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry, 95356303d34SSven Eckelmann struct batadv_orig_node *orig_node, 95456303d34SSven Eckelmann const char *message) 955db08e6e5SSimon Wunderlich { 956db08e6e5SSimon Wunderlich bool last_entry = true; 957db08e6e5SSimon Wunderlich struct hlist_head *head; 958db08e6e5SSimon Wunderlich struct hlist_node *node; 95956303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 960db08e6e5SSimon Wunderlich 961db08e6e5SSimon Wunderlich /* no local entry exists, case 1: 962db08e6e5SSimon Wunderlich * Check if this is the last one or if other entries exist. 963db08e6e5SSimon Wunderlich */ 964db08e6e5SSimon Wunderlich 965db08e6e5SSimon Wunderlich rcu_read_lock(); 966db08e6e5SSimon Wunderlich head = &tt_global_entry->orig_list; 967db08e6e5SSimon Wunderlich hlist_for_each_entry_rcu(orig_entry, node, head, list) { 968db08e6e5SSimon Wunderlich if (orig_entry->orig_node != orig_node) { 969db08e6e5SSimon Wunderlich last_entry = false; 970db08e6e5SSimon Wunderlich break; 971db08e6e5SSimon Wunderlich } 972db08e6e5SSimon Wunderlich } 973db08e6e5SSimon Wunderlich rcu_read_unlock(); 974db08e6e5SSimon Wunderlich 975db08e6e5SSimon Wunderlich if (last_entry) { 976db08e6e5SSimon Wunderlich /* its the last one, mark for roaming. */ 977acd34afaSSven Eckelmann tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; 978db08e6e5SSimon Wunderlich tt_global_entry->roam_at = jiffies; 979db08e6e5SSimon Wunderlich } else 980db08e6e5SSimon Wunderlich /* there is another entry, we can simply delete this 981db08e6e5SSimon Wunderlich * one and can still use the other one. 982db08e6e5SSimon Wunderlich */ 983a513088dSSven Eckelmann batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, 984db08e6e5SSimon Wunderlich orig_node, message); 985db08e6e5SSimon Wunderlich } 986db08e6e5SSimon Wunderlich 987db08e6e5SSimon Wunderlich 988db08e6e5SSimon Wunderlich 98956303d34SSven Eckelmann static void batadv_tt_global_del(struct batadv_priv *bat_priv, 99056303d34SSven Eckelmann struct batadv_orig_node *orig_node, 991de7aae65SSven Eckelmann const unsigned char *addr, 992cc47f66eSAntonio Quartulli const char *message, bool roaming) 993a73105b8SAntonio Quartulli { 99456303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry = NULL; 99556303d34SSven Eckelmann struct batadv_tt_local_entry *local_entry = NULL; 996a73105b8SAntonio Quartulli 997a513088dSSven Eckelmann tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); 998db08e6e5SSimon Wunderlich if (!tt_global_entry) 9997683fdc1SAntonio Quartulli goto out; 1000a73105b8SAntonio Quartulli 1001db08e6e5SSimon Wunderlich if (!roaming) { 1002a513088dSSven Eckelmann batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, 1003a513088dSSven Eckelmann orig_node, message); 100492f90f56SSven Eckelmann 1005db08e6e5SSimon Wunderlich if (hlist_empty(&tt_global_entry->orig_list)) 1006a513088dSSven Eckelmann batadv_tt_global_del_struct(bat_priv, tt_global_entry, 1007db08e6e5SSimon Wunderlich message); 1008db08e6e5SSimon Wunderlich 1009cc47f66eSAntonio Quartulli goto out; 1010cc47f66eSAntonio Quartulli } 101192f90f56SSven Eckelmann 1012db08e6e5SSimon Wunderlich /* if we are deleting a global entry due to a roam 1013db08e6e5SSimon Wunderlich * event, there are two possibilities: 1014db08e6e5SSimon Wunderlich * 1) the client roamed from node A to node B => if there 1015db08e6e5SSimon Wunderlich * is only one originator left for this client, we mark 1016acd34afaSSven Eckelmann * it with BATADV_TT_CLIENT_ROAM, we start a timer and we 1017db08e6e5SSimon Wunderlich * wait for node B to claim it. In case of timeout 1018db08e6e5SSimon Wunderlich * the entry is purged. 1019db08e6e5SSimon Wunderlich * 1020db08e6e5SSimon Wunderlich * If there are other originators left, we directly delete 1021db08e6e5SSimon Wunderlich * the originator. 1022db08e6e5SSimon Wunderlich * 2) the client roamed to us => we can directly delete 10239cfc7bd6SSven Eckelmann * the global entry, since it is useless now. 10249cfc7bd6SSven Eckelmann */ 1025a513088dSSven Eckelmann local_entry = batadv_tt_local_hash_find(bat_priv, 1026db08e6e5SSimon Wunderlich tt_global_entry->common.addr); 1027a513088dSSven Eckelmann if (local_entry) { 1028db08e6e5SSimon Wunderlich /* local entry exists, case 2: client roamed to us. */ 1029a513088dSSven Eckelmann batadv_tt_global_del_orig_list(tt_global_entry); 1030a513088dSSven Eckelmann batadv_tt_global_del_struct(bat_priv, tt_global_entry, message); 1031db08e6e5SSimon Wunderlich } else 1032db08e6e5SSimon Wunderlich /* no local entry exists, case 1: check for roaming */ 1033a513088dSSven Eckelmann batadv_tt_global_del_roaming(bat_priv, tt_global_entry, 1034a513088dSSven Eckelmann orig_node, message); 1035db08e6e5SSimon Wunderlich 103692f90f56SSven Eckelmann 1037cc47f66eSAntonio Quartulli out: 10387683fdc1SAntonio Quartulli if (tt_global_entry) 1039a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 1040a513088dSSven Eckelmann if (local_entry) 1041a513088dSSven Eckelmann batadv_tt_local_entry_free_ref(local_entry); 1042a73105b8SAntonio Quartulli } 1043a73105b8SAntonio Quartulli 104456303d34SSven Eckelmann void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, 104556303d34SSven Eckelmann struct batadv_orig_node *orig_node, 104656303d34SSven Eckelmann const char *message) 1047c6c8fea2SSven Eckelmann { 104856303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global; 104956303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 1050c90681b8SAntonio Quartulli uint32_t i; 1051807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.global_hash; 1052a73105b8SAntonio Quartulli struct hlist_node *node, *safe; 1053a73105b8SAntonio Quartulli struct hlist_head *head; 10547683fdc1SAntonio Quartulli spinlock_t *list_lock; /* protects write access to the hash lists */ 1055c6c8fea2SSven Eckelmann 10566e801494SSimon Wunderlich if (!hash) 10576e801494SSimon Wunderlich return; 10586e801494SSimon Wunderlich 1059a73105b8SAntonio Quartulli for (i = 0; i < hash->size; i++) { 1060a73105b8SAntonio Quartulli head = &hash->table[i]; 10617683fdc1SAntonio Quartulli list_lock = &hash->list_locks[i]; 1062c6c8fea2SSven Eckelmann 10637683fdc1SAntonio Quartulli spin_lock_bh(list_lock); 106448100bacSAntonio Quartulli hlist_for_each_entry_safe(tt_common_entry, node, safe, 1065a73105b8SAntonio Quartulli head, hash_entry) { 106656303d34SSven Eckelmann tt_global = container_of(tt_common_entry, 106756303d34SSven Eckelmann struct batadv_tt_global_entry, 106848100bacSAntonio Quartulli common); 1069db08e6e5SSimon Wunderlich 107056303d34SSven Eckelmann batadv_tt_global_del_orig_entry(bat_priv, tt_global, 1071db08e6e5SSimon Wunderlich orig_node, message); 1072db08e6e5SSimon Wunderlich 107356303d34SSven Eckelmann if (hlist_empty(&tt_global->orig_list)) { 107439c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 1075db08e6e5SSimon Wunderlich "Deleting global tt entry %pM: %s\n", 107656303d34SSven Eckelmann tt_global->common.addr, message); 10777683fdc1SAntonio Quartulli hlist_del_rcu(node); 107856303d34SSven Eckelmann batadv_tt_global_entry_free_ref(tt_global); 1079c6c8fea2SSven Eckelmann } 1080a73105b8SAntonio Quartulli } 10817683fdc1SAntonio Quartulli spin_unlock_bh(list_lock); 10827683fdc1SAntonio Quartulli } 108317071578SAntonio Quartulli orig_node->tt_initialised = false; 1084c6c8fea2SSven Eckelmann } 1085c6c8fea2SSven Eckelmann 108630cfd02bSAntonio Quartulli static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, 108730cfd02bSAntonio Quartulli char **msg) 1088cc47f66eSAntonio Quartulli { 108930cfd02bSAntonio Quartulli bool purge = false; 109030cfd02bSAntonio Quartulli unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; 109130cfd02bSAntonio Quartulli unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; 1092cc47f66eSAntonio Quartulli 109330cfd02bSAntonio Quartulli if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && 109430cfd02bSAntonio Quartulli batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { 109530cfd02bSAntonio Quartulli purge = true; 109630cfd02bSAntonio Quartulli *msg = "Roaming timeout\n"; 109742d0b044SSven Eckelmann } 109842d0b044SSven Eckelmann 109930cfd02bSAntonio Quartulli if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && 110030cfd02bSAntonio Quartulli batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { 110130cfd02bSAntonio Quartulli purge = true; 110230cfd02bSAntonio Quartulli *msg = "Temporary client timeout\n"; 110330cfd02bSAntonio Quartulli } 110430cfd02bSAntonio Quartulli 110530cfd02bSAntonio Quartulli return purge; 110630cfd02bSAntonio Quartulli } 110730cfd02bSAntonio Quartulli 110830cfd02bSAntonio Quartulli static void batadv_tt_global_purge(struct batadv_priv *bat_priv) 110942d0b044SSven Eckelmann { 1110807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.global_hash; 111142d0b044SSven Eckelmann struct hlist_head *head; 111230cfd02bSAntonio Quartulli struct hlist_node *node, *node_tmp; 111342d0b044SSven Eckelmann spinlock_t *list_lock; /* protects write access to the hash lists */ 111442d0b044SSven Eckelmann uint32_t i; 111530cfd02bSAntonio Quartulli char *msg = NULL; 111630cfd02bSAntonio Quartulli struct batadv_tt_common_entry *tt_common; 111730cfd02bSAntonio Quartulli struct batadv_tt_global_entry *tt_global; 111842d0b044SSven Eckelmann 111942d0b044SSven Eckelmann for (i = 0; i < hash->size; i++) { 112042d0b044SSven Eckelmann head = &hash->table[i]; 112142d0b044SSven Eckelmann list_lock = &hash->list_locks[i]; 112242d0b044SSven Eckelmann 112342d0b044SSven Eckelmann spin_lock_bh(list_lock); 112430cfd02bSAntonio Quartulli hlist_for_each_entry_safe(tt_common, node, node_tmp, head, 112530cfd02bSAntonio Quartulli hash_entry) { 112630cfd02bSAntonio Quartulli tt_global = container_of(tt_common, 112730cfd02bSAntonio Quartulli struct batadv_tt_global_entry, 112830cfd02bSAntonio Quartulli common); 112930cfd02bSAntonio Quartulli 113030cfd02bSAntonio Quartulli if (!batadv_tt_global_to_purge(tt_global, &msg)) 113130cfd02bSAntonio Quartulli continue; 113230cfd02bSAntonio Quartulli 113330cfd02bSAntonio Quartulli batadv_dbg(BATADV_DBG_TT, bat_priv, 113430cfd02bSAntonio Quartulli "Deleting global tt entry (%pM): %s\n", 113530cfd02bSAntonio Quartulli tt_global->common.addr, msg); 113630cfd02bSAntonio Quartulli 113730cfd02bSAntonio Quartulli hlist_del_rcu(node); 113830cfd02bSAntonio Quartulli 113930cfd02bSAntonio Quartulli batadv_tt_global_entry_free_ref(tt_global); 114030cfd02bSAntonio Quartulli } 11417683fdc1SAntonio Quartulli spin_unlock_bh(list_lock); 1142cc47f66eSAntonio Quartulli } 1143cc47f66eSAntonio Quartulli } 1144cc47f66eSAntonio Quartulli 114556303d34SSven Eckelmann static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) 1146c6c8fea2SSven Eckelmann { 11475bf74e9cSSven Eckelmann struct batadv_hashtable *hash; 11487683fdc1SAntonio Quartulli spinlock_t *list_lock; /* protects write access to the hash lists */ 114956303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 115056303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global; 11517683fdc1SAntonio Quartulli struct hlist_node *node, *node_tmp; 11527683fdc1SAntonio Quartulli struct hlist_head *head; 1153c90681b8SAntonio Quartulli uint32_t i; 11547683fdc1SAntonio Quartulli 1155807736f6SSven Eckelmann if (!bat_priv->tt.global_hash) 1156c6c8fea2SSven Eckelmann return; 1157c6c8fea2SSven Eckelmann 1158807736f6SSven Eckelmann hash = bat_priv->tt.global_hash; 11597683fdc1SAntonio Quartulli 11607683fdc1SAntonio Quartulli for (i = 0; i < hash->size; i++) { 11617683fdc1SAntonio Quartulli head = &hash->table[i]; 11627683fdc1SAntonio Quartulli list_lock = &hash->list_locks[i]; 11637683fdc1SAntonio Quartulli 11647683fdc1SAntonio Quartulli spin_lock_bh(list_lock); 116548100bacSAntonio Quartulli hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, 11667683fdc1SAntonio Quartulli head, hash_entry) { 11677683fdc1SAntonio Quartulli hlist_del_rcu(node); 116856303d34SSven Eckelmann tt_global = container_of(tt_common_entry, 116956303d34SSven Eckelmann struct batadv_tt_global_entry, 117048100bacSAntonio Quartulli common); 117156303d34SSven Eckelmann batadv_tt_global_entry_free_ref(tt_global); 11727683fdc1SAntonio Quartulli } 11737683fdc1SAntonio Quartulli spin_unlock_bh(list_lock); 11747683fdc1SAntonio Quartulli } 11757683fdc1SAntonio Quartulli 11761a8eaf07SSven Eckelmann batadv_hash_destroy(hash); 11777683fdc1SAntonio Quartulli 1178807736f6SSven Eckelmann bat_priv->tt.global_hash = NULL; 1179c6c8fea2SSven Eckelmann } 1180c6c8fea2SSven Eckelmann 118156303d34SSven Eckelmann static bool 118256303d34SSven Eckelmann _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, 118356303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry) 118459b699cdSAntonio Quartulli { 118559b699cdSAntonio Quartulli bool ret = false; 118659b699cdSAntonio Quartulli 1187acd34afaSSven Eckelmann if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && 1188acd34afaSSven Eckelmann tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) 118959b699cdSAntonio Quartulli ret = true; 119059b699cdSAntonio Quartulli 119159b699cdSAntonio Quartulli return ret; 119259b699cdSAntonio Quartulli } 119359b699cdSAntonio Quartulli 119456303d34SSven Eckelmann struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, 119508c36d3eSSven Eckelmann const uint8_t *src, 119608c36d3eSSven Eckelmann const uint8_t *addr) 1197c6c8fea2SSven Eckelmann { 119856303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry = NULL; 119956303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry = NULL; 120056303d34SSven Eckelmann struct batadv_orig_node *orig_node = NULL; 120156303d34SSven Eckelmann struct batadv_neigh_node *router = NULL; 1202db08e6e5SSimon Wunderlich struct hlist_head *head; 1203db08e6e5SSimon Wunderlich struct hlist_node *node; 120456303d34SSven Eckelmann struct batadv_tt_orig_list_entry *orig_entry; 1205db08e6e5SSimon Wunderlich int best_tq; 1206c6c8fea2SSven Eckelmann 12073d393e47SAntonio Quartulli if (src && atomic_read(&bat_priv->ap_isolation)) { 1208a513088dSSven Eckelmann tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); 12093d393e47SAntonio Quartulli if (!tt_local_entry) 12103d393e47SAntonio Quartulli goto out; 12113d393e47SAntonio Quartulli } 12127aadf889SMarek Lindner 1213a513088dSSven Eckelmann tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); 12142dafb49dSAntonio Quartulli if (!tt_global_entry) 12157b36e8eeSMarek Lindner goto out; 1216c6c8fea2SSven Eckelmann 12173d393e47SAntonio Quartulli /* check whether the clients should not communicate due to AP 12189cfc7bd6SSven Eckelmann * isolation 12199cfc7bd6SSven Eckelmann */ 1220a513088dSSven Eckelmann if (tt_local_entry && 1221a513088dSSven Eckelmann _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) 12223d393e47SAntonio Quartulli goto out; 12233d393e47SAntonio Quartulli 1224db08e6e5SSimon Wunderlich best_tq = 0; 12257b36e8eeSMarek Lindner 1226db08e6e5SSimon Wunderlich rcu_read_lock(); 1227db08e6e5SSimon Wunderlich head = &tt_global_entry->orig_list; 1228db08e6e5SSimon Wunderlich hlist_for_each_entry_rcu(orig_entry, node, head, list) { 12297d211efcSSven Eckelmann router = batadv_orig_node_get_router(orig_entry->orig_node); 1230db08e6e5SSimon Wunderlich if (!router) 1231db08e6e5SSimon Wunderlich continue; 12327b36e8eeSMarek Lindner 1233db08e6e5SSimon Wunderlich if (router->tq_avg > best_tq) { 1234db08e6e5SSimon Wunderlich orig_node = orig_entry->orig_node; 1235db08e6e5SSimon Wunderlich best_tq = router->tq_avg; 1236db08e6e5SSimon Wunderlich } 12377d211efcSSven Eckelmann batadv_neigh_node_free_ref(router); 1238db08e6e5SSimon Wunderlich } 1239db08e6e5SSimon Wunderlich /* found anything? */ 1240db08e6e5SSimon Wunderlich if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) 1241db08e6e5SSimon Wunderlich orig_node = NULL; 1242db08e6e5SSimon Wunderlich rcu_read_unlock(); 12437b36e8eeSMarek Lindner out: 12443d393e47SAntonio Quartulli if (tt_global_entry) 1245a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 12463d393e47SAntonio Quartulli if (tt_local_entry) 1247a513088dSSven Eckelmann batadv_tt_local_entry_free_ref(tt_local_entry); 12483d393e47SAntonio Quartulli 12497b36e8eeSMarek Lindner return orig_node; 1250c6c8fea2SSven Eckelmann } 1251a73105b8SAntonio Quartulli 1252a73105b8SAntonio Quartulli /* Calculates the checksum of the local table of a given orig_node */ 125356303d34SSven Eckelmann static uint16_t batadv_tt_global_crc(struct batadv_priv *bat_priv, 125456303d34SSven Eckelmann struct batadv_orig_node *orig_node) 1255a73105b8SAntonio Quartulli { 1256a73105b8SAntonio Quartulli uint16_t total = 0, total_one; 1257807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.global_hash; 125856303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common; 125956303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global; 1260a73105b8SAntonio Quartulli struct hlist_node *node; 1261a73105b8SAntonio Quartulli struct hlist_head *head; 1262c90681b8SAntonio Quartulli uint32_t i; 1263c90681b8SAntonio Quartulli int j; 1264a73105b8SAntonio Quartulli 1265a73105b8SAntonio Quartulli for (i = 0; i < hash->size; i++) { 1266a73105b8SAntonio Quartulli head = &hash->table[i]; 1267a73105b8SAntonio Quartulli 1268a73105b8SAntonio Quartulli rcu_read_lock(); 1269acd34afaSSven Eckelmann hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { 127056303d34SSven Eckelmann tt_global = container_of(tt_common, 127156303d34SSven Eckelmann struct batadv_tt_global_entry, 127248100bacSAntonio Quartulli common); 1273cc47f66eSAntonio Quartulli /* Roaming clients are in the global table for 1274cc47f66eSAntonio Quartulli * consistency only. They don't have to be 1275cc47f66eSAntonio Quartulli * taken into account while computing the 1276db08e6e5SSimon Wunderlich * global crc 1277db08e6e5SSimon Wunderlich */ 1278acd34afaSSven Eckelmann if (tt_common->flags & BATADV_TT_CLIENT_ROAM) 1279cc47f66eSAntonio Quartulli continue; 128030cfd02bSAntonio Quartulli /* Temporary clients have not been announced yet, so 128130cfd02bSAntonio Quartulli * they have to be skipped while computing the global 128230cfd02bSAntonio Quartulli * crc 128330cfd02bSAntonio Quartulli */ 128430cfd02bSAntonio Quartulli if (tt_common->flags & BATADV_TT_CLIENT_TEMP) 128530cfd02bSAntonio Quartulli continue; 1286db08e6e5SSimon Wunderlich 1287db08e6e5SSimon Wunderlich /* find out if this global entry is announced by this 1288db08e6e5SSimon Wunderlich * originator 1289db08e6e5SSimon Wunderlich */ 129056303d34SSven Eckelmann if (!batadv_tt_global_entry_has_orig(tt_global, 1291db08e6e5SSimon Wunderlich orig_node)) 1292db08e6e5SSimon Wunderlich continue; 1293db08e6e5SSimon Wunderlich 1294a73105b8SAntonio Quartulli total_one = 0; 1295a73105b8SAntonio Quartulli for (j = 0; j < ETH_ALEN; j++) 1296a73105b8SAntonio Quartulli total_one = crc16_byte(total_one, 1297acd34afaSSven Eckelmann tt_common->addr[j]); 1298a73105b8SAntonio Quartulli total ^= total_one; 1299a73105b8SAntonio Quartulli } 1300a73105b8SAntonio Quartulli rcu_read_unlock(); 1301a73105b8SAntonio Quartulli } 1302a73105b8SAntonio Quartulli 1303a73105b8SAntonio Quartulli return total; 1304a73105b8SAntonio Quartulli } 1305a73105b8SAntonio Quartulli 1306a73105b8SAntonio Quartulli /* Calculates the checksum of the local table */ 130756303d34SSven Eckelmann static uint16_t batadv_tt_local_crc(struct batadv_priv *bat_priv) 1308a73105b8SAntonio Quartulli { 1309a73105b8SAntonio Quartulli uint16_t total = 0, total_one; 1310807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.local_hash; 131156303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common; 1312a73105b8SAntonio Quartulli struct hlist_node *node; 1313a73105b8SAntonio Quartulli struct hlist_head *head; 1314c90681b8SAntonio Quartulli uint32_t i; 1315c90681b8SAntonio Quartulli int j; 1316a73105b8SAntonio Quartulli 1317a73105b8SAntonio Quartulli for (i = 0; i < hash->size; i++) { 1318a73105b8SAntonio Quartulli head = &hash->table[i]; 1319a73105b8SAntonio Quartulli 1320a73105b8SAntonio Quartulli rcu_read_lock(); 1321acd34afaSSven Eckelmann hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { 1322058d0e26SAntonio Quartulli /* not yet committed clients have not to be taken into 13239cfc7bd6SSven Eckelmann * account while computing the CRC 13249cfc7bd6SSven Eckelmann */ 1325acd34afaSSven Eckelmann if (tt_common->flags & BATADV_TT_CLIENT_NEW) 1326058d0e26SAntonio Quartulli continue; 1327a73105b8SAntonio Quartulli total_one = 0; 1328a73105b8SAntonio Quartulli for (j = 0; j < ETH_ALEN; j++) 1329a73105b8SAntonio Quartulli total_one = crc16_byte(total_one, 1330acd34afaSSven Eckelmann tt_common->addr[j]); 1331a73105b8SAntonio Quartulli total ^= total_one; 1332a73105b8SAntonio Quartulli } 1333a73105b8SAntonio Quartulli rcu_read_unlock(); 1334a73105b8SAntonio Quartulli } 1335a73105b8SAntonio Quartulli 1336a73105b8SAntonio Quartulli return total; 1337a73105b8SAntonio Quartulli } 1338a73105b8SAntonio Quartulli 133956303d34SSven Eckelmann static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) 1340a73105b8SAntonio Quartulli { 134156303d34SSven Eckelmann struct batadv_tt_req_node *node, *safe; 1342a73105b8SAntonio Quartulli 1343807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.req_list_lock); 1344a73105b8SAntonio Quartulli 1345807736f6SSven Eckelmann list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { 1346a73105b8SAntonio Quartulli list_del(&node->list); 1347a73105b8SAntonio Quartulli kfree(node); 1348a73105b8SAntonio Quartulli } 1349a73105b8SAntonio Quartulli 1350807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.req_list_lock); 1351a73105b8SAntonio Quartulli } 1352a73105b8SAntonio Quartulli 135356303d34SSven Eckelmann static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, 135456303d34SSven Eckelmann struct batadv_orig_node *orig_node, 1355de7aae65SSven Eckelmann const unsigned char *tt_buff, 1356de7aae65SSven Eckelmann uint8_t tt_num_changes) 1357a73105b8SAntonio Quartulli { 135808c36d3eSSven Eckelmann uint16_t tt_buff_len = batadv_tt_len(tt_num_changes); 1359a73105b8SAntonio Quartulli 1360a73105b8SAntonio Quartulli /* Replace the old buffer only if I received something in the 13619cfc7bd6SSven Eckelmann * last OGM (the OGM could carry no changes) 13629cfc7bd6SSven Eckelmann */ 1363a73105b8SAntonio Quartulli spin_lock_bh(&orig_node->tt_buff_lock); 1364a73105b8SAntonio Quartulli if (tt_buff_len > 0) { 1365a73105b8SAntonio Quartulli kfree(orig_node->tt_buff); 1366a73105b8SAntonio Quartulli orig_node->tt_buff_len = 0; 1367a73105b8SAntonio Quartulli orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); 1368a73105b8SAntonio Quartulli if (orig_node->tt_buff) { 1369a73105b8SAntonio Quartulli memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); 1370a73105b8SAntonio Quartulli orig_node->tt_buff_len = tt_buff_len; 1371a73105b8SAntonio Quartulli } 1372a73105b8SAntonio Quartulli } 1373a73105b8SAntonio Quartulli spin_unlock_bh(&orig_node->tt_buff_lock); 1374a73105b8SAntonio Quartulli } 1375a73105b8SAntonio Quartulli 137656303d34SSven Eckelmann static void batadv_tt_req_purge(struct batadv_priv *bat_priv) 1377a73105b8SAntonio Quartulli { 137856303d34SSven Eckelmann struct batadv_tt_req_node *node, *safe; 1379a73105b8SAntonio Quartulli 1380807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.req_list_lock); 1381807736f6SSven Eckelmann list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { 138242d0b044SSven Eckelmann if (batadv_has_timed_out(node->issued_at, 138342d0b044SSven Eckelmann BATADV_TT_REQUEST_TIMEOUT)) { 1384a73105b8SAntonio Quartulli list_del(&node->list); 1385a73105b8SAntonio Quartulli kfree(node); 1386a73105b8SAntonio Quartulli } 1387a73105b8SAntonio Quartulli } 1388807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.req_list_lock); 1389a73105b8SAntonio Quartulli } 1390a73105b8SAntonio Quartulli 1391a73105b8SAntonio Quartulli /* returns the pointer to the new tt_req_node struct if no request 13929cfc7bd6SSven Eckelmann * has already been issued for this orig_node, NULL otherwise 13939cfc7bd6SSven Eckelmann */ 139456303d34SSven Eckelmann static struct batadv_tt_req_node * 139556303d34SSven Eckelmann batadv_new_tt_req_node(struct batadv_priv *bat_priv, 139656303d34SSven Eckelmann struct batadv_orig_node *orig_node) 1397a73105b8SAntonio Quartulli { 139856303d34SSven Eckelmann struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; 1399a73105b8SAntonio Quartulli 1400807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.req_list_lock); 1401807736f6SSven Eckelmann list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { 14021eda58bfSSven Eckelmann if (batadv_compare_eth(tt_req_node_tmp, orig_node) && 14031eda58bfSSven Eckelmann !batadv_has_timed_out(tt_req_node_tmp->issued_at, 140442d0b044SSven Eckelmann BATADV_TT_REQUEST_TIMEOUT)) 1405a73105b8SAntonio Quartulli goto unlock; 1406a73105b8SAntonio Quartulli } 1407a73105b8SAntonio Quartulli 1408a73105b8SAntonio Quartulli tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); 1409a73105b8SAntonio Quartulli if (!tt_req_node) 1410a73105b8SAntonio Quartulli goto unlock; 1411a73105b8SAntonio Quartulli 1412a73105b8SAntonio Quartulli memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); 1413a73105b8SAntonio Quartulli tt_req_node->issued_at = jiffies; 1414a73105b8SAntonio Quartulli 1415807736f6SSven Eckelmann list_add(&tt_req_node->list, &bat_priv->tt.req_list); 1416a73105b8SAntonio Quartulli unlock: 1417807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.req_list_lock); 1418a73105b8SAntonio Quartulli return tt_req_node; 1419a73105b8SAntonio Quartulli } 1420a73105b8SAntonio Quartulli 1421058d0e26SAntonio Quartulli /* data_ptr is useless here, but has to be kept to respect the prototype */ 1422a513088dSSven Eckelmann static int batadv_tt_local_valid_entry(const void *entry_ptr, 1423a513088dSSven Eckelmann const void *data_ptr) 1424058d0e26SAntonio Quartulli { 142556303d34SSven Eckelmann const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; 1426058d0e26SAntonio Quartulli 1427acd34afaSSven Eckelmann if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) 1428058d0e26SAntonio Quartulli return 0; 1429058d0e26SAntonio Quartulli return 1; 1430058d0e26SAntonio Quartulli } 1431058d0e26SAntonio Quartulli 1432a513088dSSven Eckelmann static int batadv_tt_global_valid(const void *entry_ptr, 1433a513088dSSven Eckelmann const void *data_ptr) 1434a73105b8SAntonio Quartulli { 143556303d34SSven Eckelmann const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; 143656303d34SSven Eckelmann const struct batadv_tt_global_entry *tt_global_entry; 143756303d34SSven Eckelmann const struct batadv_orig_node *orig_node = data_ptr; 1438a73105b8SAntonio Quartulli 143930cfd02bSAntonio Quartulli if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || 144030cfd02bSAntonio Quartulli tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) 1441cc47f66eSAntonio Quartulli return 0; 1442cc47f66eSAntonio Quartulli 144356303d34SSven Eckelmann tt_global_entry = container_of(tt_common_entry, 144456303d34SSven Eckelmann struct batadv_tt_global_entry, 144548100bacSAntonio Quartulli common); 144648100bacSAntonio Quartulli 1447a513088dSSven Eckelmann return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); 1448a73105b8SAntonio Quartulli } 1449a73105b8SAntonio Quartulli 1450a513088dSSven Eckelmann static struct sk_buff * 1451a513088dSSven Eckelmann batadv_tt_response_fill_table(uint16_t tt_len, uint8_t ttvn, 14525bf74e9cSSven Eckelmann struct batadv_hashtable *hash, 145356303d34SSven Eckelmann struct batadv_hard_iface *primary_if, 1454a513088dSSven Eckelmann int (*valid_cb)(const void *, const void *), 1455a73105b8SAntonio Quartulli void *cb_data) 1456a73105b8SAntonio Quartulli { 145756303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 145896412690SSven Eckelmann struct batadv_tt_query_packet *tt_response; 145996412690SSven Eckelmann struct batadv_tt_change *tt_change; 1460a73105b8SAntonio Quartulli struct hlist_node *node; 1461a73105b8SAntonio Quartulli struct hlist_head *head; 1462a73105b8SAntonio Quartulli struct sk_buff *skb = NULL; 1463a73105b8SAntonio Quartulli uint16_t tt_tot, tt_count; 146496412690SSven Eckelmann ssize_t tt_query_size = sizeof(struct batadv_tt_query_packet); 1465c90681b8SAntonio Quartulli uint32_t i; 146696412690SSven Eckelmann size_t len; 1467a73105b8SAntonio Quartulli 1468a73105b8SAntonio Quartulli if (tt_query_size + tt_len > primary_if->soft_iface->mtu) { 1469a73105b8SAntonio Quartulli tt_len = primary_if->soft_iface->mtu - tt_query_size; 147096412690SSven Eckelmann tt_len -= tt_len % sizeof(struct batadv_tt_change); 1471a73105b8SAntonio Quartulli } 147296412690SSven Eckelmann tt_tot = tt_len / sizeof(struct batadv_tt_change); 1473a73105b8SAntonio Quartulli 147496412690SSven Eckelmann len = tt_query_size + tt_len; 147596412690SSven Eckelmann skb = dev_alloc_skb(len + ETH_HLEN); 1476a73105b8SAntonio Quartulli if (!skb) 1477a73105b8SAntonio Quartulli goto out; 1478a73105b8SAntonio Quartulli 1479a73105b8SAntonio Quartulli skb_reserve(skb, ETH_HLEN); 148096412690SSven Eckelmann tt_response = (struct batadv_tt_query_packet *)skb_put(skb, len); 1481a73105b8SAntonio Quartulli tt_response->ttvn = ttvn; 1482a73105b8SAntonio Quartulli 148396412690SSven Eckelmann tt_change = (struct batadv_tt_change *)(skb->data + tt_query_size); 1484a73105b8SAntonio Quartulli tt_count = 0; 1485a73105b8SAntonio Quartulli 1486a73105b8SAntonio Quartulli rcu_read_lock(); 1487a73105b8SAntonio Quartulli for (i = 0; i < hash->size; i++) { 1488a73105b8SAntonio Quartulli head = &hash->table[i]; 1489a73105b8SAntonio Quartulli 149048100bacSAntonio Quartulli hlist_for_each_entry_rcu(tt_common_entry, node, 1491a73105b8SAntonio Quartulli head, hash_entry) { 1492a73105b8SAntonio Quartulli if (tt_count == tt_tot) 1493a73105b8SAntonio Quartulli break; 1494a73105b8SAntonio Quartulli 149548100bacSAntonio Quartulli if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) 1496a73105b8SAntonio Quartulli continue; 1497a73105b8SAntonio Quartulli 149848100bacSAntonio Quartulli memcpy(tt_change->addr, tt_common_entry->addr, 149948100bacSAntonio Quartulli ETH_ALEN); 150042d0b044SSven Eckelmann tt_change->flags = BATADV_NO_FLAGS; 1501a73105b8SAntonio Quartulli 1502a73105b8SAntonio Quartulli tt_count++; 1503a73105b8SAntonio Quartulli tt_change++; 1504a73105b8SAntonio Quartulli } 1505a73105b8SAntonio Quartulli } 1506a73105b8SAntonio Quartulli rcu_read_unlock(); 1507a73105b8SAntonio Quartulli 15089d852393SAntonio Quartulli /* store in the message the number of entries we have successfully 15099cfc7bd6SSven Eckelmann * copied 15109cfc7bd6SSven Eckelmann */ 15119d852393SAntonio Quartulli tt_response->tt_data = htons(tt_count); 15129d852393SAntonio Quartulli 1513a73105b8SAntonio Quartulli out: 1514a73105b8SAntonio Quartulli return skb; 1515a73105b8SAntonio Quartulli } 1516a73105b8SAntonio Quartulli 151756303d34SSven Eckelmann static int batadv_send_tt_request(struct batadv_priv *bat_priv, 151856303d34SSven Eckelmann struct batadv_orig_node *dst_orig_node, 1519a513088dSSven Eckelmann uint8_t ttvn, uint16_t tt_crc, 1520a513088dSSven Eckelmann bool full_table) 1521a73105b8SAntonio Quartulli { 1522a73105b8SAntonio Quartulli struct sk_buff *skb = NULL; 152396412690SSven Eckelmann struct batadv_tt_query_packet *tt_request; 152456303d34SSven Eckelmann struct batadv_neigh_node *neigh_node = NULL; 152556303d34SSven Eckelmann struct batadv_hard_iface *primary_if; 152656303d34SSven Eckelmann struct batadv_tt_req_node *tt_req_node = NULL; 1527a73105b8SAntonio Quartulli int ret = 1; 152896412690SSven Eckelmann size_t tt_req_len; 1529a73105b8SAntonio Quartulli 1530e5d89254SSven Eckelmann primary_if = batadv_primary_if_get_selected(bat_priv); 1531a73105b8SAntonio Quartulli if (!primary_if) 1532a73105b8SAntonio Quartulli goto out; 1533a73105b8SAntonio Quartulli 1534a73105b8SAntonio Quartulli /* The new tt_req will be issued only if I'm not waiting for a 15359cfc7bd6SSven Eckelmann * reply from the same orig_node yet 15369cfc7bd6SSven Eckelmann */ 1537a513088dSSven Eckelmann tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); 1538a73105b8SAntonio Quartulli if (!tt_req_node) 1539a73105b8SAntonio Quartulli goto out; 1540a73105b8SAntonio Quartulli 154196412690SSven Eckelmann skb = dev_alloc_skb(sizeof(*tt_request) + ETH_HLEN); 1542a73105b8SAntonio Quartulli if (!skb) 1543a73105b8SAntonio Quartulli goto out; 1544a73105b8SAntonio Quartulli 1545a73105b8SAntonio Quartulli skb_reserve(skb, ETH_HLEN); 1546a73105b8SAntonio Quartulli 154796412690SSven Eckelmann tt_req_len = sizeof(*tt_request); 154896412690SSven Eckelmann tt_request = (struct batadv_tt_query_packet *)skb_put(skb, tt_req_len); 1549a73105b8SAntonio Quartulli 1550acd34afaSSven Eckelmann tt_request->header.packet_type = BATADV_TT_QUERY; 15517e071c79SSven Eckelmann tt_request->header.version = BATADV_COMPAT_VERSION; 1552a73105b8SAntonio Quartulli memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN); 1553a73105b8SAntonio Quartulli memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN); 155442d0b044SSven Eckelmann tt_request->header.ttl = BATADV_TTL; 1555a73105b8SAntonio Quartulli tt_request->ttvn = ttvn; 15566d2003fcSAntonio Quartulli tt_request->tt_data = htons(tt_crc); 1557acd34afaSSven Eckelmann tt_request->flags = BATADV_TT_REQUEST; 1558a73105b8SAntonio Quartulli 1559a73105b8SAntonio Quartulli if (full_table) 1560acd34afaSSven Eckelmann tt_request->flags |= BATADV_TT_FULL_TABLE; 1561a73105b8SAntonio Quartulli 15627d211efcSSven Eckelmann neigh_node = batadv_orig_node_get_router(dst_orig_node); 1563a73105b8SAntonio Quartulli if (!neigh_node) 1564a73105b8SAntonio Quartulli goto out; 1565a73105b8SAntonio Quartulli 156639c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 156786ceb360SSven Eckelmann "Sending TT_REQUEST to %pM via %pM [%c]\n", 156886ceb360SSven Eckelmann dst_orig_node->orig, neigh_node->addr, 1569a73105b8SAntonio Quartulli (full_table ? 'F' : '.')); 1570a73105b8SAntonio Quartulli 1571d69909d2SSven Eckelmann batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); 1572f8214865SMartin Hundebøll 15739455e34cSSven Eckelmann batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); 1574a73105b8SAntonio Quartulli ret = 0; 1575a73105b8SAntonio Quartulli 1576a73105b8SAntonio Quartulli out: 1577a73105b8SAntonio Quartulli if (neigh_node) 15787d211efcSSven Eckelmann batadv_neigh_node_free_ref(neigh_node); 1579a73105b8SAntonio Quartulli if (primary_if) 1580e5d89254SSven Eckelmann batadv_hardif_free_ref(primary_if); 1581a73105b8SAntonio Quartulli if (ret) 1582a73105b8SAntonio Quartulli kfree_skb(skb); 1583a73105b8SAntonio Quartulli if (ret && tt_req_node) { 1584807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.req_list_lock); 1585a73105b8SAntonio Quartulli list_del(&tt_req_node->list); 1586807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.req_list_lock); 1587a73105b8SAntonio Quartulli kfree(tt_req_node); 1588a73105b8SAntonio Quartulli } 1589a73105b8SAntonio Quartulli return ret; 1590a73105b8SAntonio Quartulli } 1591a73105b8SAntonio Quartulli 159296412690SSven Eckelmann static bool 159356303d34SSven Eckelmann batadv_send_other_tt_response(struct batadv_priv *bat_priv, 159496412690SSven Eckelmann struct batadv_tt_query_packet *tt_request) 1595a73105b8SAntonio Quartulli { 159656303d34SSven Eckelmann struct batadv_orig_node *req_dst_orig_node = NULL; 159756303d34SSven Eckelmann struct batadv_orig_node *res_dst_orig_node = NULL; 159856303d34SSven Eckelmann struct batadv_neigh_node *neigh_node = NULL; 159956303d34SSven Eckelmann struct batadv_hard_iface *primary_if = NULL; 1600a73105b8SAntonio Quartulli uint8_t orig_ttvn, req_ttvn, ttvn; 1601a73105b8SAntonio Quartulli int ret = false; 1602a73105b8SAntonio Quartulli unsigned char *tt_buff; 1603a73105b8SAntonio Quartulli bool full_table; 1604a73105b8SAntonio Quartulli uint16_t tt_len, tt_tot; 1605a73105b8SAntonio Quartulli struct sk_buff *skb = NULL; 160696412690SSven Eckelmann struct batadv_tt_query_packet *tt_response; 1607c67893d1SSven Eckelmann uint8_t *packet_pos; 160896412690SSven Eckelmann size_t len; 1609a73105b8SAntonio Quartulli 161039c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 161186ceb360SSven Eckelmann "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", 161286ceb360SSven Eckelmann tt_request->src, tt_request->ttvn, tt_request->dst, 1613acd34afaSSven Eckelmann (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); 1614a73105b8SAntonio Quartulli 1615a73105b8SAntonio Quartulli /* Let's get the orig node of the REAL destination */ 1616da641193SSven Eckelmann req_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->dst); 1617a73105b8SAntonio Quartulli if (!req_dst_orig_node) 1618a73105b8SAntonio Quartulli goto out; 1619a73105b8SAntonio Quartulli 1620da641193SSven Eckelmann res_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); 1621a73105b8SAntonio Quartulli if (!res_dst_orig_node) 1622a73105b8SAntonio Quartulli goto out; 1623a73105b8SAntonio Quartulli 16247d211efcSSven Eckelmann neigh_node = batadv_orig_node_get_router(res_dst_orig_node); 1625a73105b8SAntonio Quartulli if (!neigh_node) 1626a73105b8SAntonio Quartulli goto out; 1627a73105b8SAntonio Quartulli 1628e5d89254SSven Eckelmann primary_if = batadv_primary_if_get_selected(bat_priv); 1629a73105b8SAntonio Quartulli if (!primary_if) 1630a73105b8SAntonio Quartulli goto out; 1631a73105b8SAntonio Quartulli 1632a73105b8SAntonio Quartulli orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); 1633a73105b8SAntonio Quartulli req_ttvn = tt_request->ttvn; 1634a73105b8SAntonio Quartulli 1635015758d0SAntonio Quartulli /* I don't have the requested data */ 1636a73105b8SAntonio Quartulli if (orig_ttvn != req_ttvn || 1637f25bd58aSAl Viro tt_request->tt_data != htons(req_dst_orig_node->tt_crc)) 1638a73105b8SAntonio Quartulli goto out; 1639a73105b8SAntonio Quartulli 1640015758d0SAntonio Quartulli /* If the full table has been explicitly requested */ 1641acd34afaSSven Eckelmann if (tt_request->flags & BATADV_TT_FULL_TABLE || 1642a73105b8SAntonio Quartulli !req_dst_orig_node->tt_buff) 1643a73105b8SAntonio Quartulli full_table = true; 1644a73105b8SAntonio Quartulli else 1645a73105b8SAntonio Quartulli full_table = false; 1646a73105b8SAntonio Quartulli 1647a73105b8SAntonio Quartulli /* In this version, fragmentation is not implemented, then 16489cfc7bd6SSven Eckelmann * I'll send only one packet with as much TT entries as I can 16499cfc7bd6SSven Eckelmann */ 1650a73105b8SAntonio Quartulli if (!full_table) { 1651a73105b8SAntonio Quartulli spin_lock_bh(&req_dst_orig_node->tt_buff_lock); 1652a73105b8SAntonio Quartulli tt_len = req_dst_orig_node->tt_buff_len; 165396412690SSven Eckelmann tt_tot = tt_len / sizeof(struct batadv_tt_change); 1654a73105b8SAntonio Quartulli 165596412690SSven Eckelmann len = sizeof(*tt_response) + tt_len; 165696412690SSven Eckelmann skb = dev_alloc_skb(len + ETH_HLEN); 1657a73105b8SAntonio Quartulli if (!skb) 1658a73105b8SAntonio Quartulli goto unlock; 1659a73105b8SAntonio Quartulli 1660a73105b8SAntonio Quartulli skb_reserve(skb, ETH_HLEN); 1661c67893d1SSven Eckelmann packet_pos = skb_put(skb, len); 1662c67893d1SSven Eckelmann tt_response = (struct batadv_tt_query_packet *)packet_pos; 1663a73105b8SAntonio Quartulli tt_response->ttvn = req_ttvn; 1664a73105b8SAntonio Quartulli tt_response->tt_data = htons(tt_tot); 1665a73105b8SAntonio Quartulli 166696412690SSven Eckelmann tt_buff = skb->data + sizeof(*tt_response); 1667a73105b8SAntonio Quartulli /* Copy the last orig_node's OGM buffer */ 1668a73105b8SAntonio Quartulli memcpy(tt_buff, req_dst_orig_node->tt_buff, 1669a73105b8SAntonio Quartulli req_dst_orig_node->tt_buff_len); 1670a73105b8SAntonio Quartulli 1671a73105b8SAntonio Quartulli spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); 1672a73105b8SAntonio Quartulli } else { 167396412690SSven Eckelmann tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); 167496412690SSven Eckelmann tt_len *= sizeof(struct batadv_tt_change); 1675a73105b8SAntonio Quartulli ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); 1676a73105b8SAntonio Quartulli 1677a513088dSSven Eckelmann skb = batadv_tt_response_fill_table(tt_len, ttvn, 1678807736f6SSven Eckelmann bat_priv->tt.global_hash, 1679a513088dSSven Eckelmann primary_if, 1680a513088dSSven Eckelmann batadv_tt_global_valid, 1681a73105b8SAntonio Quartulli req_dst_orig_node); 1682a73105b8SAntonio Quartulli if (!skb) 1683a73105b8SAntonio Quartulli goto out; 1684a73105b8SAntonio Quartulli 168596412690SSven Eckelmann tt_response = (struct batadv_tt_query_packet *)skb->data; 1686a73105b8SAntonio Quartulli } 1687a73105b8SAntonio Quartulli 1688acd34afaSSven Eckelmann tt_response->header.packet_type = BATADV_TT_QUERY; 16897e071c79SSven Eckelmann tt_response->header.version = BATADV_COMPAT_VERSION; 169042d0b044SSven Eckelmann tt_response->header.ttl = BATADV_TTL; 1691a73105b8SAntonio Quartulli memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN); 1692a73105b8SAntonio Quartulli memcpy(tt_response->dst, tt_request->src, ETH_ALEN); 1693acd34afaSSven Eckelmann tt_response->flags = BATADV_TT_RESPONSE; 1694a73105b8SAntonio Quartulli 1695a73105b8SAntonio Quartulli if (full_table) 1696acd34afaSSven Eckelmann tt_response->flags |= BATADV_TT_FULL_TABLE; 1697a73105b8SAntonio Quartulli 169839c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 1699a73105b8SAntonio Quartulli "Sending TT_RESPONSE %pM via %pM for %pM (ttvn: %u)\n", 1700a73105b8SAntonio Quartulli res_dst_orig_node->orig, neigh_node->addr, 1701a73105b8SAntonio Quartulli req_dst_orig_node->orig, req_ttvn); 1702a73105b8SAntonio Quartulli 1703d69909d2SSven Eckelmann batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); 1704f8214865SMartin Hundebøll 17059455e34cSSven Eckelmann batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); 1706a73105b8SAntonio Quartulli ret = true; 1707a73105b8SAntonio Quartulli goto out; 1708a73105b8SAntonio Quartulli 1709a73105b8SAntonio Quartulli unlock: 1710a73105b8SAntonio Quartulli spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); 1711a73105b8SAntonio Quartulli 1712a73105b8SAntonio Quartulli out: 1713a73105b8SAntonio Quartulli if (res_dst_orig_node) 17147d211efcSSven Eckelmann batadv_orig_node_free_ref(res_dst_orig_node); 1715a73105b8SAntonio Quartulli if (req_dst_orig_node) 17167d211efcSSven Eckelmann batadv_orig_node_free_ref(req_dst_orig_node); 1717a73105b8SAntonio Quartulli if (neigh_node) 17187d211efcSSven Eckelmann batadv_neigh_node_free_ref(neigh_node); 1719a73105b8SAntonio Quartulli if (primary_if) 1720e5d89254SSven Eckelmann batadv_hardif_free_ref(primary_if); 1721a73105b8SAntonio Quartulli if (!ret) 1722a73105b8SAntonio Quartulli kfree_skb(skb); 1723a73105b8SAntonio Quartulli return ret; 1724a73105b8SAntonio Quartulli 1725a73105b8SAntonio Quartulli } 172696412690SSven Eckelmann 172796412690SSven Eckelmann static bool 172856303d34SSven Eckelmann batadv_send_my_tt_response(struct batadv_priv *bat_priv, 172996412690SSven Eckelmann struct batadv_tt_query_packet *tt_request) 1730a73105b8SAntonio Quartulli { 173156303d34SSven Eckelmann struct batadv_orig_node *orig_node = NULL; 173256303d34SSven Eckelmann struct batadv_neigh_node *neigh_node = NULL; 173356303d34SSven Eckelmann struct batadv_hard_iface *primary_if = NULL; 1734a73105b8SAntonio Quartulli uint8_t my_ttvn, req_ttvn, ttvn; 1735a73105b8SAntonio Quartulli int ret = false; 1736a73105b8SAntonio Quartulli unsigned char *tt_buff; 1737a73105b8SAntonio Quartulli bool full_table; 1738a73105b8SAntonio Quartulli uint16_t tt_len, tt_tot; 1739a73105b8SAntonio Quartulli struct sk_buff *skb = NULL; 174096412690SSven Eckelmann struct batadv_tt_query_packet *tt_response; 1741c67893d1SSven Eckelmann uint8_t *packet_pos; 174296412690SSven Eckelmann size_t len; 1743a73105b8SAntonio Quartulli 174439c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 174586ceb360SSven Eckelmann "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", 174686ceb360SSven Eckelmann tt_request->src, tt_request->ttvn, 1747acd34afaSSven Eckelmann (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); 1748a73105b8SAntonio Quartulli 1749a73105b8SAntonio Quartulli 1750807736f6SSven Eckelmann my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); 1751a73105b8SAntonio Quartulli req_ttvn = tt_request->ttvn; 1752a73105b8SAntonio Quartulli 1753da641193SSven Eckelmann orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); 1754a73105b8SAntonio Quartulli if (!orig_node) 1755a73105b8SAntonio Quartulli goto out; 1756a73105b8SAntonio Quartulli 17577d211efcSSven Eckelmann neigh_node = batadv_orig_node_get_router(orig_node); 1758a73105b8SAntonio Quartulli if (!neigh_node) 1759a73105b8SAntonio Quartulli goto out; 1760a73105b8SAntonio Quartulli 1761e5d89254SSven Eckelmann primary_if = batadv_primary_if_get_selected(bat_priv); 1762a73105b8SAntonio Quartulli if (!primary_if) 1763a73105b8SAntonio Quartulli goto out; 1764a73105b8SAntonio Quartulli 1765a73105b8SAntonio Quartulli /* If the full table has been explicitly requested or the gap 17669cfc7bd6SSven Eckelmann * is too big send the whole local translation table 17679cfc7bd6SSven Eckelmann */ 1768acd34afaSSven Eckelmann if (tt_request->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || 1769807736f6SSven Eckelmann !bat_priv->tt.last_changeset) 1770a73105b8SAntonio Quartulli full_table = true; 1771a73105b8SAntonio Quartulli else 1772a73105b8SAntonio Quartulli full_table = false; 1773a73105b8SAntonio Quartulli 1774a73105b8SAntonio Quartulli /* In this version, fragmentation is not implemented, then 17759cfc7bd6SSven Eckelmann * I'll send only one packet with as much TT entries as I can 17769cfc7bd6SSven Eckelmann */ 1777a73105b8SAntonio Quartulli if (!full_table) { 1778807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.last_changeset_lock); 1779807736f6SSven Eckelmann tt_len = bat_priv->tt.last_changeset_len; 178096412690SSven Eckelmann tt_tot = tt_len / sizeof(struct batadv_tt_change); 1781a73105b8SAntonio Quartulli 178296412690SSven Eckelmann len = sizeof(*tt_response) + tt_len; 178396412690SSven Eckelmann skb = dev_alloc_skb(len + ETH_HLEN); 1784a73105b8SAntonio Quartulli if (!skb) 1785a73105b8SAntonio Quartulli goto unlock; 1786a73105b8SAntonio Quartulli 1787a73105b8SAntonio Quartulli skb_reserve(skb, ETH_HLEN); 1788c67893d1SSven Eckelmann packet_pos = skb_put(skb, len); 1789c67893d1SSven Eckelmann tt_response = (struct batadv_tt_query_packet *)packet_pos; 1790a73105b8SAntonio Quartulli tt_response->ttvn = req_ttvn; 1791a73105b8SAntonio Quartulli tt_response->tt_data = htons(tt_tot); 1792a73105b8SAntonio Quartulli 179396412690SSven Eckelmann tt_buff = skb->data + sizeof(*tt_response); 1794807736f6SSven Eckelmann memcpy(tt_buff, bat_priv->tt.last_changeset, 1795807736f6SSven Eckelmann bat_priv->tt.last_changeset_len); 1796807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.last_changeset_lock); 1797a73105b8SAntonio Quartulli } else { 1798807736f6SSven Eckelmann tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num); 179996412690SSven Eckelmann tt_len *= sizeof(struct batadv_tt_change); 1800807736f6SSven Eckelmann ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); 1801a73105b8SAntonio Quartulli 1802a513088dSSven Eckelmann skb = batadv_tt_response_fill_table(tt_len, ttvn, 1803807736f6SSven Eckelmann bat_priv->tt.local_hash, 1804a513088dSSven Eckelmann primary_if, 1805a513088dSSven Eckelmann batadv_tt_local_valid_entry, 1806058d0e26SAntonio Quartulli NULL); 1807a73105b8SAntonio Quartulli if (!skb) 1808a73105b8SAntonio Quartulli goto out; 1809a73105b8SAntonio Quartulli 181096412690SSven Eckelmann tt_response = (struct batadv_tt_query_packet *)skb->data; 1811a73105b8SAntonio Quartulli } 1812a73105b8SAntonio Quartulli 1813acd34afaSSven Eckelmann tt_response->header.packet_type = BATADV_TT_QUERY; 18147e071c79SSven Eckelmann tt_response->header.version = BATADV_COMPAT_VERSION; 181542d0b044SSven Eckelmann tt_response->header.ttl = BATADV_TTL; 1816a73105b8SAntonio Quartulli memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN); 1817a73105b8SAntonio Quartulli memcpy(tt_response->dst, tt_request->src, ETH_ALEN); 1818acd34afaSSven Eckelmann tt_response->flags = BATADV_TT_RESPONSE; 1819a73105b8SAntonio Quartulli 1820a73105b8SAntonio Quartulli if (full_table) 1821acd34afaSSven Eckelmann tt_response->flags |= BATADV_TT_FULL_TABLE; 1822a73105b8SAntonio Quartulli 182339c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 1824a73105b8SAntonio Quartulli "Sending TT_RESPONSE to %pM via %pM [%c]\n", 1825a73105b8SAntonio Quartulli orig_node->orig, neigh_node->addr, 1826acd34afaSSven Eckelmann (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); 1827a73105b8SAntonio Quartulli 1828d69909d2SSven Eckelmann batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); 1829f8214865SMartin Hundebøll 18309455e34cSSven Eckelmann batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); 1831a73105b8SAntonio Quartulli ret = true; 1832a73105b8SAntonio Quartulli goto out; 1833a73105b8SAntonio Quartulli 1834a73105b8SAntonio Quartulli unlock: 1835807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.last_changeset_lock); 1836a73105b8SAntonio Quartulli out: 1837a73105b8SAntonio Quartulli if (orig_node) 18387d211efcSSven Eckelmann batadv_orig_node_free_ref(orig_node); 1839a73105b8SAntonio Quartulli if (neigh_node) 18407d211efcSSven Eckelmann batadv_neigh_node_free_ref(neigh_node); 1841a73105b8SAntonio Quartulli if (primary_if) 1842e5d89254SSven Eckelmann batadv_hardif_free_ref(primary_if); 1843a73105b8SAntonio Quartulli if (!ret) 1844a73105b8SAntonio Quartulli kfree_skb(skb); 1845a73105b8SAntonio Quartulli /* This packet was for me, so it doesn't need to be re-routed */ 1846a73105b8SAntonio Quartulli return true; 1847a73105b8SAntonio Quartulli } 1848a73105b8SAntonio Quartulli 184956303d34SSven Eckelmann bool batadv_send_tt_response(struct batadv_priv *bat_priv, 185096412690SSven Eckelmann struct batadv_tt_query_packet *tt_request) 1851a73105b8SAntonio Quartulli { 18523193e8fdSSven Eckelmann if (batadv_is_my_mac(tt_request->dst)) { 185320ff9d59SSimon Wunderlich /* don't answer backbone gws! */ 185408adf151SSven Eckelmann if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src)) 185520ff9d59SSimon Wunderlich return true; 185620ff9d59SSimon Wunderlich 1857a513088dSSven Eckelmann return batadv_send_my_tt_response(bat_priv, tt_request); 185820ff9d59SSimon Wunderlich } else { 1859a513088dSSven Eckelmann return batadv_send_other_tt_response(bat_priv, tt_request); 1860a73105b8SAntonio Quartulli } 186120ff9d59SSimon Wunderlich } 1862a73105b8SAntonio Quartulli 186356303d34SSven Eckelmann static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, 186456303d34SSven Eckelmann struct batadv_orig_node *orig_node, 186596412690SSven Eckelmann struct batadv_tt_change *tt_change, 1866a73105b8SAntonio Quartulli uint16_t tt_num_changes, uint8_t ttvn) 1867a73105b8SAntonio Quartulli { 1868a73105b8SAntonio Quartulli int i; 1869a513088dSSven Eckelmann int roams; 1870a73105b8SAntonio Quartulli 1871a73105b8SAntonio Quartulli for (i = 0; i < tt_num_changes; i++) { 1872acd34afaSSven Eckelmann if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { 1873acd34afaSSven Eckelmann roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; 1874a513088dSSven Eckelmann batadv_tt_global_del(bat_priv, orig_node, 1875a73105b8SAntonio Quartulli (tt_change + i)->addr, 1876cc47f66eSAntonio Quartulli "tt removed by changes", 1877a513088dSSven Eckelmann roams); 187808c36d3eSSven Eckelmann } else { 187908c36d3eSSven Eckelmann if (!batadv_tt_global_add(bat_priv, orig_node, 1880d4f44692SAntonio Quartulli (tt_change + i)->addr, 1881d4f44692SAntonio Quartulli (tt_change + i)->flags, ttvn)) 1882a73105b8SAntonio Quartulli /* In case of problem while storing a 1883a73105b8SAntonio Quartulli * global_entry, we stop the updating 1884a73105b8SAntonio Quartulli * procedure without committing the 1885a73105b8SAntonio Quartulli * ttvn change. This will avoid to send 1886a73105b8SAntonio Quartulli * corrupted data on tt_request 1887a73105b8SAntonio Quartulli */ 1888a73105b8SAntonio Quartulli return; 1889a73105b8SAntonio Quartulli } 189008c36d3eSSven Eckelmann } 189117071578SAntonio Quartulli orig_node->tt_initialised = true; 1892a73105b8SAntonio Quartulli } 1893a73105b8SAntonio Quartulli 189456303d34SSven Eckelmann static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, 189596412690SSven Eckelmann struct batadv_tt_query_packet *tt_response) 1896a73105b8SAntonio Quartulli { 189756303d34SSven Eckelmann struct batadv_orig_node *orig_node = NULL; 1898a73105b8SAntonio Quartulli 1899da641193SSven Eckelmann orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); 1900a73105b8SAntonio Quartulli if (!orig_node) 1901a73105b8SAntonio Quartulli goto out; 1902a73105b8SAntonio Quartulli 1903a73105b8SAntonio Quartulli /* Purge the old table first.. */ 190408c36d3eSSven Eckelmann batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); 1905a73105b8SAntonio Quartulli 1906a513088dSSven Eckelmann _batadv_tt_update_changes(bat_priv, orig_node, 190796412690SSven Eckelmann (struct batadv_tt_change *)(tt_response + 1), 1908a513088dSSven Eckelmann ntohs(tt_response->tt_data), 1909a513088dSSven Eckelmann tt_response->ttvn); 1910a73105b8SAntonio Quartulli 1911a73105b8SAntonio Quartulli spin_lock_bh(&orig_node->tt_buff_lock); 1912a73105b8SAntonio Quartulli kfree(orig_node->tt_buff); 1913a73105b8SAntonio Quartulli orig_node->tt_buff_len = 0; 1914a73105b8SAntonio Quartulli orig_node->tt_buff = NULL; 1915a73105b8SAntonio Quartulli spin_unlock_bh(&orig_node->tt_buff_lock); 1916a73105b8SAntonio Quartulli 1917a73105b8SAntonio Quartulli atomic_set(&orig_node->last_ttvn, tt_response->ttvn); 1918a73105b8SAntonio Quartulli 1919a73105b8SAntonio Quartulli out: 1920a73105b8SAntonio Quartulli if (orig_node) 19217d211efcSSven Eckelmann batadv_orig_node_free_ref(orig_node); 1922a73105b8SAntonio Quartulli } 1923a73105b8SAntonio Quartulli 192456303d34SSven Eckelmann static void batadv_tt_update_changes(struct batadv_priv *bat_priv, 192556303d34SSven Eckelmann struct batadv_orig_node *orig_node, 1926a73105b8SAntonio Quartulli uint16_t tt_num_changes, uint8_t ttvn, 192796412690SSven Eckelmann struct batadv_tt_change *tt_change) 1928a73105b8SAntonio Quartulli { 1929a513088dSSven Eckelmann _batadv_tt_update_changes(bat_priv, orig_node, tt_change, 1930a513088dSSven Eckelmann tt_num_changes, ttvn); 1931a73105b8SAntonio Quartulli 1932a513088dSSven Eckelmann batadv_tt_save_orig_buffer(bat_priv, orig_node, 1933a513088dSSven Eckelmann (unsigned char *)tt_change, tt_num_changes); 1934a73105b8SAntonio Quartulli atomic_set(&orig_node->last_ttvn, ttvn); 1935a73105b8SAntonio Quartulli } 1936a73105b8SAntonio Quartulli 193756303d34SSven Eckelmann bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr) 1938a73105b8SAntonio Quartulli { 193956303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry = NULL; 19407683fdc1SAntonio Quartulli bool ret = false; 1941a73105b8SAntonio Quartulli 1942a513088dSSven Eckelmann tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); 19437683fdc1SAntonio Quartulli if (!tt_local_entry) 19447683fdc1SAntonio Quartulli goto out; 1945058d0e26SAntonio Quartulli /* Check if the client has been logically deleted (but is kept for 19469cfc7bd6SSven Eckelmann * consistency purpose) 19479cfc7bd6SSven Eckelmann */ 1948acd34afaSSven Eckelmann if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) 1949058d0e26SAntonio Quartulli goto out; 19507683fdc1SAntonio Quartulli ret = true; 19517683fdc1SAntonio Quartulli out: 1952a73105b8SAntonio Quartulli if (tt_local_entry) 1953a513088dSSven Eckelmann batadv_tt_local_entry_free_ref(tt_local_entry); 19547683fdc1SAntonio Quartulli return ret; 1955a73105b8SAntonio Quartulli } 1956a73105b8SAntonio Quartulli 195756303d34SSven Eckelmann void batadv_handle_tt_response(struct batadv_priv *bat_priv, 195896412690SSven Eckelmann struct batadv_tt_query_packet *tt_response) 1959a73105b8SAntonio Quartulli { 196056303d34SSven Eckelmann struct batadv_tt_req_node *node, *safe; 196156303d34SSven Eckelmann struct batadv_orig_node *orig_node = NULL; 196296412690SSven Eckelmann struct batadv_tt_change *tt_change; 1963a73105b8SAntonio Quartulli 196439c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 196586ceb360SSven Eckelmann "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", 1966f25bd58aSAl Viro tt_response->src, tt_response->ttvn, 1967f25bd58aSAl Viro ntohs(tt_response->tt_data), 1968acd34afaSSven Eckelmann (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); 1969a73105b8SAntonio Quartulli 197020ff9d59SSimon Wunderlich /* we should have never asked a backbone gw */ 197108adf151SSven Eckelmann if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_response->src)) 197220ff9d59SSimon Wunderlich goto out; 197320ff9d59SSimon Wunderlich 1974da641193SSven Eckelmann orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); 1975a73105b8SAntonio Quartulli if (!orig_node) 1976a73105b8SAntonio Quartulli goto out; 1977a73105b8SAntonio Quartulli 197896412690SSven Eckelmann if (tt_response->flags & BATADV_TT_FULL_TABLE) { 1979a513088dSSven Eckelmann batadv_tt_fill_gtable(bat_priv, tt_response); 198096412690SSven Eckelmann } else { 198196412690SSven Eckelmann tt_change = (struct batadv_tt_change *)(tt_response + 1); 1982a513088dSSven Eckelmann batadv_tt_update_changes(bat_priv, orig_node, 1983f25bd58aSAl Viro ntohs(tt_response->tt_data), 198496412690SSven Eckelmann tt_response->ttvn, tt_change); 198596412690SSven Eckelmann } 1986a73105b8SAntonio Quartulli 1987a73105b8SAntonio Quartulli /* Delete the tt_req_node from pending tt_requests list */ 1988807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.req_list_lock); 1989807736f6SSven Eckelmann list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { 19901eda58bfSSven Eckelmann if (!batadv_compare_eth(node->addr, tt_response->src)) 1991a73105b8SAntonio Quartulli continue; 1992a73105b8SAntonio Quartulli list_del(&node->list); 1993a73105b8SAntonio Quartulli kfree(node); 1994a73105b8SAntonio Quartulli } 1995807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.req_list_lock); 1996a73105b8SAntonio Quartulli 1997a73105b8SAntonio Quartulli /* Recalculate the CRC for this orig_node and store it */ 1998a513088dSSven Eckelmann orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); 1999cc47f66eSAntonio Quartulli /* Roaming phase is over: tables are in sync again. I can 20009cfc7bd6SSven Eckelmann * unset the flag 20019cfc7bd6SSven Eckelmann */ 2002cc47f66eSAntonio Quartulli orig_node->tt_poss_change = false; 2003a73105b8SAntonio Quartulli out: 2004a73105b8SAntonio Quartulli if (orig_node) 20057d211efcSSven Eckelmann batadv_orig_node_free_ref(orig_node); 2006a73105b8SAntonio Quartulli } 2007a73105b8SAntonio Quartulli 200856303d34SSven Eckelmann int batadv_tt_init(struct batadv_priv *bat_priv) 2009a73105b8SAntonio Quartulli { 20105346c35eSSven Eckelmann int ret; 2011a73105b8SAntonio Quartulli 2012a513088dSSven Eckelmann ret = batadv_tt_local_init(bat_priv); 20135346c35eSSven Eckelmann if (ret < 0) 20145346c35eSSven Eckelmann return ret; 20155346c35eSSven Eckelmann 2016a513088dSSven Eckelmann ret = batadv_tt_global_init(bat_priv); 20175346c35eSSven Eckelmann if (ret < 0) 20185346c35eSSven Eckelmann return ret; 2019a73105b8SAntonio Quartulli 2020a513088dSSven Eckelmann batadv_tt_start_timer(bat_priv); 2021a73105b8SAntonio Quartulli 2022a73105b8SAntonio Quartulli return 1; 2023a73105b8SAntonio Quartulli } 2024a73105b8SAntonio Quartulli 202556303d34SSven Eckelmann static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) 2026a73105b8SAntonio Quartulli { 202756303d34SSven Eckelmann struct batadv_tt_roam_node *node, *safe; 2028a73105b8SAntonio Quartulli 2029807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.roam_list_lock); 2030a73105b8SAntonio Quartulli 2031807736f6SSven Eckelmann list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { 2032cc47f66eSAntonio Quartulli list_del(&node->list); 2033cc47f66eSAntonio Quartulli kfree(node); 2034cc47f66eSAntonio Quartulli } 2035cc47f66eSAntonio Quartulli 2036807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.roam_list_lock); 2037cc47f66eSAntonio Quartulli } 2038cc47f66eSAntonio Quartulli 203956303d34SSven Eckelmann static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) 2040cc47f66eSAntonio Quartulli { 204156303d34SSven Eckelmann struct batadv_tt_roam_node *node, *safe; 2042cc47f66eSAntonio Quartulli 2043807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.roam_list_lock); 2044807736f6SSven Eckelmann list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { 204542d0b044SSven Eckelmann if (!batadv_has_timed_out(node->first_time, 204642d0b044SSven Eckelmann BATADV_ROAMING_MAX_TIME)) 2047cc47f66eSAntonio Quartulli continue; 2048cc47f66eSAntonio Quartulli 2049cc47f66eSAntonio Quartulli list_del(&node->list); 2050cc47f66eSAntonio Quartulli kfree(node); 2051cc47f66eSAntonio Quartulli } 2052807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.roam_list_lock); 2053cc47f66eSAntonio Quartulli } 2054cc47f66eSAntonio Quartulli 2055cc47f66eSAntonio Quartulli /* This function checks whether the client already reached the 2056cc47f66eSAntonio Quartulli * maximum number of possible roaming phases. In this case the ROAMING_ADV 2057cc47f66eSAntonio Quartulli * will not be sent. 2058cc47f66eSAntonio Quartulli * 20599cfc7bd6SSven Eckelmann * returns true if the ROAMING_ADV can be sent, false otherwise 20609cfc7bd6SSven Eckelmann */ 206156303d34SSven Eckelmann static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, 2062cc47f66eSAntonio Quartulli uint8_t *client) 2063cc47f66eSAntonio Quartulli { 206456303d34SSven Eckelmann struct batadv_tt_roam_node *tt_roam_node; 2065cc47f66eSAntonio Quartulli bool ret = false; 2066cc47f66eSAntonio Quartulli 2067807736f6SSven Eckelmann spin_lock_bh(&bat_priv->tt.roam_list_lock); 2068cc47f66eSAntonio Quartulli /* The new tt_req will be issued only if I'm not waiting for a 20699cfc7bd6SSven Eckelmann * reply from the same orig_node yet 20709cfc7bd6SSven Eckelmann */ 2071807736f6SSven Eckelmann list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { 20721eda58bfSSven Eckelmann if (!batadv_compare_eth(tt_roam_node->addr, client)) 2073cc47f66eSAntonio Quartulli continue; 2074cc47f66eSAntonio Quartulli 20751eda58bfSSven Eckelmann if (batadv_has_timed_out(tt_roam_node->first_time, 207642d0b044SSven Eckelmann BATADV_ROAMING_MAX_TIME)) 2077cc47f66eSAntonio Quartulli continue; 2078cc47f66eSAntonio Quartulli 20793e34819eSSven Eckelmann if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) 2080cc47f66eSAntonio Quartulli /* Sorry, you roamed too many times! */ 2081cc47f66eSAntonio Quartulli goto unlock; 2082cc47f66eSAntonio Quartulli ret = true; 2083cc47f66eSAntonio Quartulli break; 2084cc47f66eSAntonio Quartulli } 2085cc47f66eSAntonio Quartulli 2086cc47f66eSAntonio Quartulli if (!ret) { 2087cc47f66eSAntonio Quartulli tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); 2088cc47f66eSAntonio Quartulli if (!tt_roam_node) 2089cc47f66eSAntonio Quartulli goto unlock; 2090cc47f66eSAntonio Quartulli 2091cc47f66eSAntonio Quartulli tt_roam_node->first_time = jiffies; 209242d0b044SSven Eckelmann atomic_set(&tt_roam_node->counter, 209342d0b044SSven Eckelmann BATADV_ROAMING_MAX_COUNT - 1); 2094cc47f66eSAntonio Quartulli memcpy(tt_roam_node->addr, client, ETH_ALEN); 2095cc47f66eSAntonio Quartulli 2096807736f6SSven Eckelmann list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); 2097cc47f66eSAntonio Quartulli ret = true; 2098cc47f66eSAntonio Quartulli } 2099cc47f66eSAntonio Quartulli 2100cc47f66eSAntonio Quartulli unlock: 2101807736f6SSven Eckelmann spin_unlock_bh(&bat_priv->tt.roam_list_lock); 2102cc47f66eSAntonio Quartulli return ret; 2103cc47f66eSAntonio Quartulli } 2104cc47f66eSAntonio Quartulli 210556303d34SSven Eckelmann static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, 210656303d34SSven Eckelmann struct batadv_orig_node *orig_node) 2107cc47f66eSAntonio Quartulli { 210856303d34SSven Eckelmann struct batadv_neigh_node *neigh_node = NULL; 2109cc47f66eSAntonio Quartulli struct sk_buff *skb = NULL; 211096412690SSven Eckelmann struct batadv_roam_adv_packet *roam_adv_packet; 2111cc47f66eSAntonio Quartulli int ret = 1; 211256303d34SSven Eckelmann struct batadv_hard_iface *primary_if; 211396412690SSven Eckelmann size_t len = sizeof(*roam_adv_packet); 2114cc47f66eSAntonio Quartulli 2115cc47f66eSAntonio Quartulli /* before going on we have to check whether the client has 21169cfc7bd6SSven Eckelmann * already roamed to us too many times 21179cfc7bd6SSven Eckelmann */ 2118a513088dSSven Eckelmann if (!batadv_tt_check_roam_count(bat_priv, client)) 2119cc47f66eSAntonio Quartulli goto out; 2120cc47f66eSAntonio Quartulli 212196412690SSven Eckelmann skb = dev_alloc_skb(sizeof(*roam_adv_packet) + ETH_HLEN); 2122cc47f66eSAntonio Quartulli if (!skb) 2123cc47f66eSAntonio Quartulli goto out; 2124cc47f66eSAntonio Quartulli 2125cc47f66eSAntonio Quartulli skb_reserve(skb, ETH_HLEN); 2126cc47f66eSAntonio Quartulli 212796412690SSven Eckelmann roam_adv_packet = (struct batadv_roam_adv_packet *)skb_put(skb, len); 2128cc47f66eSAntonio Quartulli 2129acd34afaSSven Eckelmann roam_adv_packet->header.packet_type = BATADV_ROAM_ADV; 21307e071c79SSven Eckelmann roam_adv_packet->header.version = BATADV_COMPAT_VERSION; 213142d0b044SSven Eckelmann roam_adv_packet->header.ttl = BATADV_TTL; 2132162d549cSSven Eckelmann roam_adv_packet->reserved = 0; 2133e5d89254SSven Eckelmann primary_if = batadv_primary_if_get_selected(bat_priv); 2134cc47f66eSAntonio Quartulli if (!primary_if) 2135cc47f66eSAntonio Quartulli goto out; 2136cc47f66eSAntonio Quartulli memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); 2137e5d89254SSven Eckelmann batadv_hardif_free_ref(primary_if); 2138cc47f66eSAntonio Quartulli memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN); 2139cc47f66eSAntonio Quartulli memcpy(roam_adv_packet->client, client, ETH_ALEN); 2140cc47f66eSAntonio Quartulli 21417d211efcSSven Eckelmann neigh_node = batadv_orig_node_get_router(orig_node); 2142cc47f66eSAntonio Quartulli if (!neigh_node) 2143cc47f66eSAntonio Quartulli goto out; 2144cc47f66eSAntonio Quartulli 214539c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 2146cc47f66eSAntonio Quartulli "Sending ROAMING_ADV to %pM (client %pM) via %pM\n", 2147cc47f66eSAntonio Quartulli orig_node->orig, client, neigh_node->addr); 2148cc47f66eSAntonio Quartulli 2149d69909d2SSven Eckelmann batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); 2150f8214865SMartin Hundebøll 21519455e34cSSven Eckelmann batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); 2152cc47f66eSAntonio Quartulli ret = 0; 2153cc47f66eSAntonio Quartulli 2154cc47f66eSAntonio Quartulli out: 2155cc47f66eSAntonio Quartulli if (neigh_node) 21567d211efcSSven Eckelmann batadv_neigh_node_free_ref(neigh_node); 2157cc47f66eSAntonio Quartulli if (ret) 2158cc47f66eSAntonio Quartulli kfree_skb(skb); 2159cc47f66eSAntonio Quartulli return; 2160a73105b8SAntonio Quartulli } 2161a73105b8SAntonio Quartulli 2162a513088dSSven Eckelmann static void batadv_tt_purge(struct work_struct *work) 2163a73105b8SAntonio Quartulli { 216456303d34SSven Eckelmann struct delayed_work *delayed_work; 2165807736f6SSven Eckelmann struct batadv_priv_tt *priv_tt; 216656303d34SSven Eckelmann struct batadv_priv *bat_priv; 216756303d34SSven Eckelmann 216856303d34SSven Eckelmann delayed_work = container_of(work, struct delayed_work, work); 2169807736f6SSven Eckelmann priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); 2170807736f6SSven Eckelmann bat_priv = container_of(priv_tt, struct batadv_priv, tt); 2171a73105b8SAntonio Quartulli 2172a513088dSSven Eckelmann batadv_tt_local_purge(bat_priv); 217330cfd02bSAntonio Quartulli batadv_tt_global_purge(bat_priv); 2174a513088dSSven Eckelmann batadv_tt_req_purge(bat_priv); 2175a513088dSSven Eckelmann batadv_tt_roam_purge(bat_priv); 2176a73105b8SAntonio Quartulli 2177a513088dSSven Eckelmann batadv_tt_start_timer(bat_priv); 2178a73105b8SAntonio Quartulli } 2179cc47f66eSAntonio Quartulli 218056303d34SSven Eckelmann void batadv_tt_free(struct batadv_priv *bat_priv) 2181cc47f66eSAntonio Quartulli { 2182807736f6SSven Eckelmann cancel_delayed_work_sync(&bat_priv->tt.work); 2183cc47f66eSAntonio Quartulli 2184a513088dSSven Eckelmann batadv_tt_local_table_free(bat_priv); 2185a513088dSSven Eckelmann batadv_tt_global_table_free(bat_priv); 2186a513088dSSven Eckelmann batadv_tt_req_list_free(bat_priv); 2187a513088dSSven Eckelmann batadv_tt_changes_list_free(bat_priv); 2188a513088dSSven Eckelmann batadv_tt_roam_list_free(bat_priv); 2189cc47f66eSAntonio Quartulli 2190807736f6SSven Eckelmann kfree(bat_priv->tt.last_changeset); 2191cc47f66eSAntonio Quartulli } 2192058d0e26SAntonio Quartulli 2193697f2531SAntonio Quartulli /* This function will enable or disable the specified flags for all the entries 21949cfc7bd6SSven Eckelmann * in the given hash table and returns the number of modified entries 21959cfc7bd6SSven Eckelmann */ 21965bf74e9cSSven Eckelmann static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, 21975bf74e9cSSven Eckelmann uint16_t flags, bool enable) 2198058d0e26SAntonio Quartulli { 2199c90681b8SAntonio Quartulli uint32_t i; 2200697f2531SAntonio Quartulli uint16_t changed_num = 0; 2201058d0e26SAntonio Quartulli struct hlist_head *head; 2202058d0e26SAntonio Quartulli struct hlist_node *node; 220356303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common_entry; 2204058d0e26SAntonio Quartulli 2205058d0e26SAntonio Quartulli if (!hash) 2206697f2531SAntonio Quartulli goto out; 2207058d0e26SAntonio Quartulli 2208058d0e26SAntonio Quartulli for (i = 0; i < hash->size; i++) { 2209058d0e26SAntonio Quartulli head = &hash->table[i]; 2210058d0e26SAntonio Quartulli 2211058d0e26SAntonio Quartulli rcu_read_lock(); 221248100bacSAntonio Quartulli hlist_for_each_entry_rcu(tt_common_entry, node, 2213058d0e26SAntonio Quartulli head, hash_entry) { 2214697f2531SAntonio Quartulli if (enable) { 2215697f2531SAntonio Quartulli if ((tt_common_entry->flags & flags) == flags) 2216697f2531SAntonio Quartulli continue; 2217697f2531SAntonio Quartulli tt_common_entry->flags |= flags; 2218697f2531SAntonio Quartulli } else { 221948100bacSAntonio Quartulli if (!(tt_common_entry->flags & flags)) 222031901264SAntonio Quartulli continue; 222148100bacSAntonio Quartulli tt_common_entry->flags &= ~flags; 2222697f2531SAntonio Quartulli } 2223697f2531SAntonio Quartulli changed_num++; 2224058d0e26SAntonio Quartulli } 2225058d0e26SAntonio Quartulli rcu_read_unlock(); 2226058d0e26SAntonio Quartulli } 2227697f2531SAntonio Quartulli out: 2228697f2531SAntonio Quartulli return changed_num; 2229058d0e26SAntonio Quartulli } 2230058d0e26SAntonio Quartulli 2231acd34afaSSven Eckelmann /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ 223256303d34SSven Eckelmann static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) 2233058d0e26SAntonio Quartulli { 2234807736f6SSven Eckelmann struct batadv_hashtable *hash = bat_priv->tt.local_hash; 223556303d34SSven Eckelmann struct batadv_tt_common_entry *tt_common; 223656303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local; 2237058d0e26SAntonio Quartulli struct hlist_node *node, *node_tmp; 2238058d0e26SAntonio Quartulli struct hlist_head *head; 2239058d0e26SAntonio Quartulli spinlock_t *list_lock; /* protects write access to the hash lists */ 2240c90681b8SAntonio Quartulli uint32_t i; 2241058d0e26SAntonio Quartulli 2242058d0e26SAntonio Quartulli if (!hash) 2243058d0e26SAntonio Quartulli return; 2244058d0e26SAntonio Quartulli 2245058d0e26SAntonio Quartulli for (i = 0; i < hash->size; i++) { 2246058d0e26SAntonio Quartulli head = &hash->table[i]; 2247058d0e26SAntonio Quartulli list_lock = &hash->list_locks[i]; 2248058d0e26SAntonio Quartulli 2249058d0e26SAntonio Quartulli spin_lock_bh(list_lock); 2250acd34afaSSven Eckelmann hlist_for_each_entry_safe(tt_common, node, node_tmp, head, 2251acd34afaSSven Eckelmann hash_entry) { 2252acd34afaSSven Eckelmann if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) 2253058d0e26SAntonio Quartulli continue; 2254058d0e26SAntonio Quartulli 225539c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 225686ceb360SSven Eckelmann "Deleting local tt entry (%pM): pending\n", 2257acd34afaSSven Eckelmann tt_common->addr); 2258058d0e26SAntonio Quartulli 2259807736f6SSven Eckelmann atomic_dec(&bat_priv->tt.local_entry_num); 2260058d0e26SAntonio Quartulli hlist_del_rcu(node); 226156303d34SSven Eckelmann tt_local = container_of(tt_common, 226256303d34SSven Eckelmann struct batadv_tt_local_entry, 226348100bacSAntonio Quartulli common); 226456303d34SSven Eckelmann batadv_tt_local_entry_free_ref(tt_local); 2265058d0e26SAntonio Quartulli } 2266058d0e26SAntonio Quartulli spin_unlock_bh(list_lock); 2267058d0e26SAntonio Quartulli } 2268058d0e26SAntonio Quartulli 2269058d0e26SAntonio Quartulli } 2270058d0e26SAntonio Quartulli 227156303d34SSven Eckelmann static int batadv_tt_commit_changes(struct batadv_priv *bat_priv, 2272a513088dSSven Eckelmann unsigned char **packet_buff, 2273a513088dSSven Eckelmann int *packet_buff_len, int packet_min_len) 2274058d0e26SAntonio Quartulli { 2275be9aa4c1SMarek Lindner uint16_t changed_num = 0; 2276be9aa4c1SMarek Lindner 2277807736f6SSven Eckelmann if (atomic_read(&bat_priv->tt.local_changes) < 1) 2278be9aa4c1SMarek Lindner return -ENOENT; 2279be9aa4c1SMarek Lindner 2280807736f6SSven Eckelmann changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash, 2281acd34afaSSven Eckelmann BATADV_TT_CLIENT_NEW, false); 2282be9aa4c1SMarek Lindner 2283be9aa4c1SMarek Lindner /* all reset entries have to be counted as local entries */ 2284807736f6SSven Eckelmann atomic_add(changed_num, &bat_priv->tt.local_entry_num); 2285a513088dSSven Eckelmann batadv_tt_local_purge_pending_clients(bat_priv); 2286807736f6SSven Eckelmann bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv); 2287058d0e26SAntonio Quartulli 2288058d0e26SAntonio Quartulli /* Increment the TTVN only once per OGM interval */ 2289807736f6SSven Eckelmann atomic_inc(&bat_priv->tt.vn); 229039c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 22911eda58bfSSven Eckelmann "Local changes committed, updating to ttvn %u\n", 2292807736f6SSven Eckelmann (uint8_t)atomic_read(&bat_priv->tt.vn)); 2293807736f6SSven Eckelmann bat_priv->tt.poss_change = false; 2294be9aa4c1SMarek Lindner 2295be9aa4c1SMarek Lindner /* reset the sending counter */ 2296807736f6SSven Eckelmann atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); 2297be9aa4c1SMarek Lindner 2298a513088dSSven Eckelmann return batadv_tt_changes_fill_buff(bat_priv, packet_buff, 2299be9aa4c1SMarek Lindner packet_buff_len, packet_min_len); 2300be9aa4c1SMarek Lindner } 2301be9aa4c1SMarek Lindner 2302be9aa4c1SMarek Lindner /* when calling this function (hard_iface == primary_if) has to be true */ 230356303d34SSven Eckelmann int batadv_tt_append_diff(struct batadv_priv *bat_priv, 2304be9aa4c1SMarek Lindner unsigned char **packet_buff, int *packet_buff_len, 2305be9aa4c1SMarek Lindner int packet_min_len) 2306be9aa4c1SMarek Lindner { 2307be9aa4c1SMarek Lindner int tt_num_changes; 2308be9aa4c1SMarek Lindner 2309be9aa4c1SMarek Lindner /* if at least one change happened */ 2310a513088dSSven Eckelmann tt_num_changes = batadv_tt_commit_changes(bat_priv, packet_buff, 2311a513088dSSven Eckelmann packet_buff_len, 2312a513088dSSven Eckelmann packet_min_len); 2313be9aa4c1SMarek Lindner 2314be9aa4c1SMarek Lindner /* if the changes have been sent often enough */ 2315be9aa4c1SMarek Lindner if ((tt_num_changes < 0) && 2316807736f6SSven Eckelmann (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))) { 2317a513088dSSven Eckelmann batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, 2318be9aa4c1SMarek Lindner packet_min_len, packet_min_len); 2319be9aa4c1SMarek Lindner tt_num_changes = 0; 2320be9aa4c1SMarek Lindner } 2321be9aa4c1SMarek Lindner 2322be9aa4c1SMarek Lindner return tt_num_changes; 2323058d0e26SAntonio Quartulli } 232459b699cdSAntonio Quartulli 232556303d34SSven Eckelmann bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, 232608c36d3eSSven Eckelmann uint8_t *dst) 232759b699cdSAntonio Quartulli { 232856303d34SSven Eckelmann struct batadv_tt_local_entry *tt_local_entry = NULL; 232956303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry = NULL; 23305870adc6SMarek Lindner bool ret = false; 233159b699cdSAntonio Quartulli 233259b699cdSAntonio Quartulli if (!atomic_read(&bat_priv->ap_isolation)) 23335870adc6SMarek Lindner goto out; 233459b699cdSAntonio Quartulli 2335a513088dSSven Eckelmann tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); 233659b699cdSAntonio Quartulli if (!tt_local_entry) 233759b699cdSAntonio Quartulli goto out; 233859b699cdSAntonio Quartulli 2339a513088dSSven Eckelmann tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); 234059b699cdSAntonio Quartulli if (!tt_global_entry) 234159b699cdSAntonio Quartulli goto out; 234259b699cdSAntonio Quartulli 23431f129fefSAntonio Quartulli if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) 234459b699cdSAntonio Quartulli goto out; 234559b699cdSAntonio Quartulli 23465870adc6SMarek Lindner ret = true; 234759b699cdSAntonio Quartulli 234859b699cdSAntonio Quartulli out: 234959b699cdSAntonio Quartulli if (tt_global_entry) 2350a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 235159b699cdSAntonio Quartulli if (tt_local_entry) 2352a513088dSSven Eckelmann batadv_tt_local_entry_free_ref(tt_local_entry); 235359b699cdSAntonio Quartulli return ret; 235459b699cdSAntonio Quartulli } 2355a943cac1SMarek Lindner 235656303d34SSven Eckelmann void batadv_tt_update_orig(struct batadv_priv *bat_priv, 235756303d34SSven Eckelmann struct batadv_orig_node *orig_node, 2358a943cac1SMarek Lindner const unsigned char *tt_buff, uint8_t tt_num_changes, 2359a943cac1SMarek Lindner uint8_t ttvn, uint16_t tt_crc) 2360a943cac1SMarek Lindner { 2361a943cac1SMarek Lindner uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); 2362a943cac1SMarek Lindner bool full_table = true; 236396412690SSven Eckelmann struct batadv_tt_change *tt_change; 2364a943cac1SMarek Lindner 236520ff9d59SSimon Wunderlich /* don't care about a backbone gateways updates. */ 236608adf151SSven Eckelmann if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) 236720ff9d59SSimon Wunderlich return; 236820ff9d59SSimon Wunderlich 236917071578SAntonio Quartulli /* orig table not initialised AND first diff is in the OGM OR the ttvn 23709cfc7bd6SSven Eckelmann * increased by one -> we can apply the attached changes 23719cfc7bd6SSven Eckelmann */ 237217071578SAntonio Quartulli if ((!orig_node->tt_initialised && ttvn == 1) || 237317071578SAntonio Quartulli ttvn - orig_ttvn == 1) { 2374a943cac1SMarek Lindner /* the OGM could not contain the changes due to their size or 237542d0b044SSven Eckelmann * because they have already been sent BATADV_TT_OGM_APPEND_MAX 237642d0b044SSven Eckelmann * times. 23779cfc7bd6SSven Eckelmann * In this case send a tt request 23789cfc7bd6SSven Eckelmann */ 2379a943cac1SMarek Lindner if (!tt_num_changes) { 2380a943cac1SMarek Lindner full_table = false; 2381a943cac1SMarek Lindner goto request_table; 2382a943cac1SMarek Lindner } 2383a943cac1SMarek Lindner 238496412690SSven Eckelmann tt_change = (struct batadv_tt_change *)tt_buff; 2385a513088dSSven Eckelmann batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, 238696412690SSven Eckelmann ttvn, tt_change); 2387a943cac1SMarek Lindner 2388a943cac1SMarek Lindner /* Even if we received the precomputed crc with the OGM, we 2389a943cac1SMarek Lindner * prefer to recompute it to spot any possible inconsistency 23909cfc7bd6SSven Eckelmann * in the global table 23919cfc7bd6SSven Eckelmann */ 2392a513088dSSven Eckelmann orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); 2393a943cac1SMarek Lindner 2394a943cac1SMarek Lindner /* The ttvn alone is not enough to guarantee consistency 2395a943cac1SMarek Lindner * because a single value could represent different states 2396a943cac1SMarek Lindner * (due to the wrap around). Thus a node has to check whether 2397a943cac1SMarek Lindner * the resulting table (after applying the changes) is still 2398a943cac1SMarek Lindner * consistent or not. E.g. a node could disconnect while its 2399a943cac1SMarek Lindner * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case 2400a943cac1SMarek Lindner * checking the CRC value is mandatory to detect the 24019cfc7bd6SSven Eckelmann * inconsistency 24029cfc7bd6SSven Eckelmann */ 2403a943cac1SMarek Lindner if (orig_node->tt_crc != tt_crc) 2404a943cac1SMarek Lindner goto request_table; 2405a943cac1SMarek Lindner 2406a943cac1SMarek Lindner /* Roaming phase is over: tables are in sync again. I can 24079cfc7bd6SSven Eckelmann * unset the flag 24089cfc7bd6SSven Eckelmann */ 2409a943cac1SMarek Lindner orig_node->tt_poss_change = false; 2410a943cac1SMarek Lindner } else { 2411a943cac1SMarek Lindner /* if we missed more than one change or our tables are not 24129cfc7bd6SSven Eckelmann * in sync anymore -> request fresh tt data 24139cfc7bd6SSven Eckelmann */ 241417071578SAntonio Quartulli if (!orig_node->tt_initialised || ttvn != orig_ttvn || 241517071578SAntonio Quartulli orig_node->tt_crc != tt_crc) { 2416a943cac1SMarek Lindner request_table: 241739c75a51SSven Eckelmann batadv_dbg(BATADV_DBG_TT, bat_priv, 241886ceb360SSven Eckelmann "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %u last_crc: %u num_changes: %u)\n", 241986ceb360SSven Eckelmann orig_node->orig, ttvn, orig_ttvn, tt_crc, 242086ceb360SSven Eckelmann orig_node->tt_crc, tt_num_changes); 2421a513088dSSven Eckelmann batadv_send_tt_request(bat_priv, orig_node, ttvn, 2422a513088dSSven Eckelmann tt_crc, full_table); 2423a943cac1SMarek Lindner return; 2424a943cac1SMarek Lindner } 2425a943cac1SMarek Lindner } 2426a943cac1SMarek Lindner } 24273275e7ccSAntonio Quartulli 24283275e7ccSAntonio Quartulli /* returns true whether we know that the client has moved from its old 24293275e7ccSAntonio Quartulli * originator to another one. This entry is kept is still kept for consistency 24303275e7ccSAntonio Quartulli * purposes 24313275e7ccSAntonio Quartulli */ 243256303d34SSven Eckelmann bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, 243308c36d3eSSven Eckelmann uint8_t *addr) 24343275e7ccSAntonio Quartulli { 243556303d34SSven Eckelmann struct batadv_tt_global_entry *tt_global_entry; 24363275e7ccSAntonio Quartulli bool ret = false; 24373275e7ccSAntonio Quartulli 2438a513088dSSven Eckelmann tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); 24393275e7ccSAntonio Quartulli if (!tt_global_entry) 24403275e7ccSAntonio Quartulli goto out; 24413275e7ccSAntonio Quartulli 24429f9ff08dSAntonio Quartulli ret = !!(tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM); 2443a513088dSSven Eckelmann batadv_tt_global_entry_free_ref(tt_global_entry); 24443275e7ccSAntonio Quartulli out: 24453275e7ccSAntonio Quartulli return ret; 24463275e7ccSAntonio Quartulli } 244730cfd02bSAntonio Quartulli 244830cfd02bSAntonio Quartulli bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, 244930cfd02bSAntonio Quartulli struct batadv_orig_node *orig_node, 245030cfd02bSAntonio Quartulli const unsigned char *addr) 245130cfd02bSAntonio Quartulli { 245230cfd02bSAntonio Quartulli bool ret = false; 245330cfd02bSAntonio Quartulli 245430cfd02bSAntonio Quartulli if (!batadv_tt_global_add(bat_priv, orig_node, addr, 245530cfd02bSAntonio Quartulli BATADV_TT_CLIENT_TEMP, 245630cfd02bSAntonio Quartulli atomic_read(&orig_node->last_ttvn))) 245730cfd02bSAntonio Quartulli goto out; 245830cfd02bSAntonio Quartulli 245930cfd02bSAntonio Quartulli batadv_dbg(BATADV_DBG_TT, bat_priv, 246030cfd02bSAntonio Quartulli "Added temporary global client (addr: %pM orig: %pM)\n", 246130cfd02bSAntonio Quartulli addr, orig_node->orig); 246230cfd02bSAntonio Quartulli ret = true; 246330cfd02bSAntonio Quartulli out: 246430cfd02bSAntonio Quartulli return ret; 246530cfd02bSAntonio Quartulli } 2466