Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1 | /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 2 | * |
| 3 | * Marek Lindner, Simon Wunderlich |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of version 2 of the GNU General Public |
| 7 | * License as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 17 | * 02110-1301, USA |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
| 20 | #include "main.h" |
Sven Eckelmann | b706b13 | 2012-06-10 23:58:51 +0200 | [diff] [blame] | 21 | #include "sysfs.h" |
| 22 | #include "debugfs.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 23 | #include "routing.h" |
| 24 | #include "send.h" |
| 25 | #include "originator.h" |
| 26 | #include "soft-interface.h" |
| 27 | #include "icmp_socket.h" |
| 28 | #include "translation-table.h" |
| 29 | #include "hard-interface.h" |
| 30 | #include "gateway_client.h" |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 31 | #include "bridge_loop_avoidance.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 32 | #include "vis.h" |
| 33 | #include "hash.h" |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 34 | #include "bat_algo.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 35 | |
Sven Eckelmann | c3caf51 | 2011-05-03 11:51:38 +0200 | [diff] [blame] | 36 | |
| 37 | /* List manipulations on hardif_list have to be rtnl_lock()'ed, |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 38 | * list traversals just rcu-locked |
| 39 | */ |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 40 | struct list_head batadv_hardif_list; |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 41 | static int (*batadv_rx_handler[256])(struct sk_buff *, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 42 | struct batadv_hard_iface *); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 43 | char batadv_routing_algo[20] = "BATMAN_IV"; |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 44 | static struct hlist_head batadv_algo_list; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 45 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 46 | unsigned char batadv_broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 47 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 48 | struct workqueue_struct *batadv_event_workqueue; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 49 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 50 | static void batadv_recv_handler_init(void); |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 51 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 52 | static int __init batadv_init(void) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 53 | { |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 54 | INIT_LIST_HEAD(&batadv_hardif_list); |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 55 | INIT_HLIST_HEAD(&batadv_algo_list); |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 56 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 57 | batadv_recv_handler_init(); |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 58 | |
Sven Eckelmann | 81c524f | 2012-05-12 02:09:22 +0200 | [diff] [blame] | 59 | batadv_iv_init(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 60 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 61 | batadv_event_workqueue = create_singlethread_workqueue("bat_events"); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 62 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 63 | if (!batadv_event_workqueue) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 64 | return -ENOMEM; |
| 65 | |
Sven Eckelmann | 9039dc7 | 2012-05-12 02:09:33 +0200 | [diff] [blame] | 66 | batadv_socket_init(); |
Sven Eckelmann | 40a072d | 2012-05-12 02:09:23 +0200 | [diff] [blame] | 67 | batadv_debugfs_init(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 68 | |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 69 | register_netdevice_notifier(&batadv_hard_if_notifier); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 70 | |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 71 | pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n", |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 72 | BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 77 | static void __exit batadv_exit(void) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 78 | { |
Sven Eckelmann | 40a072d | 2012-05-12 02:09:23 +0200 | [diff] [blame] | 79 | batadv_debugfs_destroy(); |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 80 | unregister_netdevice_notifier(&batadv_hard_if_notifier); |
| 81 | batadv_hardif_remove_interfaces(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 82 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 83 | flush_workqueue(batadv_event_workqueue); |
| 84 | destroy_workqueue(batadv_event_workqueue); |
| 85 | batadv_event_workqueue = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 86 | |
| 87 | rcu_barrier(); |
| 88 | } |
| 89 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 90 | int batadv_mesh_init(struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 91 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 92 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 93 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 94 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 95 | spin_lock_init(&bat_priv->forw_bat_list_lock); |
| 96 | spin_lock_init(&bat_priv->forw_bcast_list_lock); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 97 | spin_lock_init(&bat_priv->tt.changes_list_lock); |
| 98 | spin_lock_init(&bat_priv->tt.req_list_lock); |
| 99 | spin_lock_init(&bat_priv->tt.roam_list_lock); |
| 100 | spin_lock_init(&bat_priv->tt.last_changeset_lock); |
| 101 | spin_lock_init(&bat_priv->gw.list_lock); |
| 102 | spin_lock_init(&bat_priv->vis.hash_lock); |
| 103 | spin_lock_init(&bat_priv->vis.list_lock); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 104 | |
| 105 | INIT_HLIST_HEAD(&bat_priv->forw_bat_list); |
| 106 | INIT_HLIST_HEAD(&bat_priv->forw_bcast_list); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 107 | INIT_HLIST_HEAD(&bat_priv->gw.list); |
| 108 | INIT_LIST_HEAD(&bat_priv->tt.changes_list); |
| 109 | INIT_LIST_HEAD(&bat_priv->tt.req_list); |
| 110 | INIT_LIST_HEAD(&bat_priv->tt.roam_list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 111 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 112 | ret = batadv_originator_init(bat_priv); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 113 | if (ret < 0) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 114 | goto err; |
| 115 | |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 116 | ret = batadv_tt_init(bat_priv); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 117 | if (ret < 0) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 118 | goto err; |
| 119 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 120 | batadv_tt_local_add(soft_iface, soft_iface->dev_addr, |
| 121 | BATADV_NULL_IFINDEX); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 122 | |
Sven Eckelmann | d0f714f | 2012-05-12 02:09:41 +0200 | [diff] [blame] | 123 | ret = batadv_vis_init(bat_priv); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 124 | if (ret < 0) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 125 | goto err; |
| 126 | |
Sven Eckelmann | 08adf15 | 2012-05-12 13:38:47 +0200 | [diff] [blame] | 127 | ret = batadv_bla_init(bat_priv); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 128 | if (ret < 0) |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 129 | goto err; |
| 130 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 131 | atomic_set(&bat_priv->gw.reselect, 0); |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 132 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_ACTIVE); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 133 | |
| 134 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 135 | |
| 136 | err: |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 137 | batadv_mesh_free(soft_iface); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 138 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 139 | } |
| 140 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 141 | void batadv_mesh_free(struct net_device *soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 142 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 143 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 144 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 145 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_DEACTIVATING); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 146 | |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 147 | batadv_purge_outstanding_packets(bat_priv, NULL); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 148 | |
Sven Eckelmann | d0f714f | 2012-05-12 02:09:41 +0200 | [diff] [blame] | 149 | batadv_vis_quit(bat_priv); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 150 | |
Sven Eckelmann | 7cf06bc | 2012-05-12 02:09:29 +0200 | [diff] [blame] | 151 | batadv_gw_node_purge(bat_priv); |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 152 | batadv_originator_free(bat_priv); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 153 | |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 154 | batadv_tt_free(bat_priv); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 155 | |
Sven Eckelmann | 08adf15 | 2012-05-12 13:38:47 +0200 | [diff] [blame] | 156 | batadv_bla_free(bat_priv); |
Simon Wunderlich | 2372138 | 2012-01-22 20:00:19 +0100 | [diff] [blame] | 157 | |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 158 | free_percpu(bat_priv->bat_counters); |
| 159 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 160 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 161 | } |
| 162 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 163 | void batadv_inc_module_count(void) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 164 | { |
| 165 | try_module_get(THIS_MODULE); |
| 166 | } |
| 167 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 168 | void batadv_dec_module_count(void) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 169 | { |
| 170 | module_put(THIS_MODULE); |
| 171 | } |
| 172 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 173 | int batadv_is_my_mac(const uint8_t *addr) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 174 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 175 | const struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 176 | |
| 177 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 178 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 179 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 180 | continue; |
| 181 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 182 | if (batadv_compare_eth(hard_iface->net_dev->dev_addr, addr)) { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 183 | rcu_read_unlock(); |
| 184 | return 1; |
| 185 | } |
| 186 | } |
| 187 | rcu_read_unlock(); |
| 188 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 189 | } |
| 190 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 191 | static int batadv_recv_unhandled_packet(struct sk_buff *skb, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 192 | struct batadv_hard_iface *recv_if) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 193 | { |
| 194 | return NET_RX_DROP; |
| 195 | } |
| 196 | |
| 197 | /* incoming packets with the batman ethertype received on any active hard |
| 198 | * interface |
| 199 | */ |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 200 | int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
| 201 | struct packet_type *ptype, |
| 202 | struct net_device *orig_dev) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 203 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 204 | struct batadv_priv *bat_priv; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 205 | struct batadv_ogm_packet *batadv_ogm_packet; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 206 | struct batadv_hard_iface *hard_iface; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 207 | uint8_t idx; |
| 208 | int ret; |
| 209 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 210 | hard_iface = container_of(ptype, struct batadv_hard_iface, |
| 211 | batman_adv_ptype); |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 212 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 213 | |
| 214 | /* skb was released by skb_share_check() */ |
| 215 | if (!skb) |
| 216 | goto err_out; |
| 217 | |
| 218 | /* packet should hold at least type and version */ |
| 219 | if (unlikely(!pskb_may_pull(skb, 2))) |
| 220 | goto err_free; |
| 221 | |
| 222 | /* expect a valid ethernet header here. */ |
| 223 | if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb))) |
| 224 | goto err_free; |
| 225 | |
| 226 | if (!hard_iface->soft_iface) |
| 227 | goto err_free; |
| 228 | |
| 229 | bat_priv = netdev_priv(hard_iface->soft_iface); |
| 230 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 231 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 232 | goto err_free; |
| 233 | |
| 234 | /* discard frames on not active interfaces */ |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 235 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 236 | goto err_free; |
| 237 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 238 | batadv_ogm_packet = (struct batadv_ogm_packet *)skb->data; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 239 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 240 | if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 241 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 242 | "Drop packet: incompatible batman version (%i)\n", |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 243 | batadv_ogm_packet->header.version); |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 244 | goto err_free; |
| 245 | } |
| 246 | |
| 247 | /* all receive handlers return whether they received or reused |
| 248 | * the supplied skb. if not, we have to free the skb. |
| 249 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 250 | idx = batadv_ogm_packet->header.packet_type; |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 251 | ret = (*batadv_rx_handler[idx])(skb, hard_iface); |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 252 | |
| 253 | if (ret == NET_RX_DROP) |
| 254 | kfree_skb(skb); |
| 255 | |
| 256 | /* return NET_RX_SUCCESS in any case as we |
| 257 | * most probably dropped the packet for |
| 258 | * routing-logical reasons. |
| 259 | */ |
| 260 | return NET_RX_SUCCESS; |
| 261 | |
| 262 | err_free: |
| 263 | kfree_skb(skb); |
| 264 | err_out: |
| 265 | return NET_RX_DROP; |
| 266 | } |
| 267 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 268 | static void batadv_recv_handler_init(void) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 269 | { |
| 270 | int i; |
| 271 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 272 | for (i = 0; i < ARRAY_SIZE(batadv_rx_handler); i++) |
| 273 | batadv_rx_handler[i] = batadv_recv_unhandled_packet; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 274 | |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 275 | /* batman icmp packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 276 | batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 277 | /* unicast packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 278 | batadv_rx_handler[BATADV_UNICAST] = batadv_recv_unicast_packet; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 279 | /* fragmented unicast packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 280 | batadv_rx_handler[BATADV_UNICAST_FRAG] = batadv_recv_ucast_frag_packet; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 281 | /* broadcast packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 282 | batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 283 | /* vis packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 284 | batadv_rx_handler[BATADV_VIS] = batadv_recv_vis_packet; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 285 | /* Translation table query (request or response) */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 286 | batadv_rx_handler[BATADV_TT_QUERY] = batadv_recv_tt_query; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 287 | /* Roaming advertisement */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 288 | batadv_rx_handler[BATADV_ROAM_ADV] = batadv_recv_roam_adv; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 289 | } |
| 290 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 291 | int |
| 292 | batadv_recv_handler_register(uint8_t packet_type, |
| 293 | int (*recv_handler)(struct sk_buff *, |
| 294 | struct batadv_hard_iface *)) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 295 | { |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 296 | if (batadv_rx_handler[packet_type] != &batadv_recv_unhandled_packet) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 297 | return -EBUSY; |
| 298 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 299 | batadv_rx_handler[packet_type] = recv_handler; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 300 | return 0; |
| 301 | } |
| 302 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 303 | void batadv_recv_handler_unregister(uint8_t packet_type) |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 304 | { |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 305 | batadv_rx_handler[packet_type] = batadv_recv_unhandled_packet; |
Marek Lindner | ffa995e | 2012-03-01 15:35:17 +0800 | [diff] [blame] | 306 | } |
| 307 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 308 | static struct batadv_algo_ops *batadv_algo_get(char *name) |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 309 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 310 | struct batadv_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 311 | struct hlist_node *node; |
| 312 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 313 | hlist_for_each_entry(bat_algo_ops_tmp, node, &batadv_algo_list, list) { |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 314 | if (strcmp(bat_algo_ops_tmp->name, name) != 0) |
| 315 | continue; |
| 316 | |
| 317 | bat_algo_ops = bat_algo_ops_tmp; |
| 318 | break; |
| 319 | } |
| 320 | |
| 321 | return bat_algo_ops; |
| 322 | } |
| 323 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 324 | int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops) |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 325 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 326 | struct batadv_algo_ops *bat_algo_ops_tmp; |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 327 | int ret; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 328 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 329 | bat_algo_ops_tmp = batadv_algo_get(bat_algo_ops->name); |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 330 | if (bat_algo_ops_tmp) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 331 | pr_info("Trying to register already registered routing algorithm: %s\n", |
| 332 | bat_algo_ops->name); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 333 | ret = -EEXIST; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 334 | goto out; |
| 335 | } |
| 336 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 337 | /* all algorithms must implement all ops (for now) */ |
Marek Lindner | c2aca02 | 2012-02-07 17:20:45 +0800 | [diff] [blame] | 338 | if (!bat_algo_ops->bat_iface_enable || |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 339 | !bat_algo_ops->bat_iface_disable || |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 340 | !bat_algo_ops->bat_iface_update_mac || |
Marek Lindner | cd8b78e | 2012-02-07 17:20:49 +0800 | [diff] [blame] | 341 | !bat_algo_ops->bat_primary_iface_set || |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 342 | !bat_algo_ops->bat_ogm_schedule || |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 343 | !bat_algo_ops->bat_ogm_emit) { |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 344 | pr_info("Routing algo '%s' does not implement required ops\n", |
| 345 | bat_algo_ops->name); |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 346 | ret = -EINVAL; |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 347 | goto out; |
| 348 | } |
| 349 | |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 350 | INIT_HLIST_NODE(&bat_algo_ops->list); |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 351 | hlist_add_head(&bat_algo_ops->list, &batadv_algo_list); |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 352 | ret = 0; |
| 353 | |
| 354 | out: |
| 355 | return ret; |
| 356 | } |
| 357 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 358 | int batadv_algo_select(struct batadv_priv *bat_priv, char *name) |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 359 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 360 | struct batadv_algo_ops *bat_algo_ops; |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 361 | int ret = -EINVAL; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 362 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 363 | bat_algo_ops = batadv_algo_get(name); |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 364 | if (!bat_algo_ops) |
| 365 | goto out; |
| 366 | |
| 367 | bat_priv->bat_algo_ops = bat_algo_ops; |
| 368 | ret = 0; |
| 369 | |
| 370 | out: |
| 371 | return ret; |
| 372 | } |
| 373 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 374 | int batadv_algo_seq_print_text(struct seq_file *seq, void *offset) |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 375 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 376 | struct batadv_algo_ops *bat_algo_ops; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 377 | struct hlist_node *node; |
| 378 | |
| 379 | seq_printf(seq, "Available routing algorithms:\n"); |
| 380 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 381 | hlist_for_each_entry(bat_algo_ops, node, &batadv_algo_list, list) { |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 382 | seq_printf(seq, "%s\n", bat_algo_ops->name); |
| 383 | } |
| 384 | |
| 385 | return 0; |
| 386 | } |
| 387 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 388 | static int batadv_param_set_ra(const char *val, const struct kernel_param *kp) |
Marek Lindner | d419be1 | 2011-12-10 19:45:53 +0800 | [diff] [blame] | 389 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 390 | struct batadv_algo_ops *bat_algo_ops; |
Marek Lindner | d8cb5486 | 2012-04-18 17:16:39 +0800 | [diff] [blame] | 391 | char *algo_name = (char *)val; |
| 392 | size_t name_len = strlen(algo_name); |
Marek Lindner | d419be1 | 2011-12-10 19:45:53 +0800 | [diff] [blame] | 393 | |
Marek Lindner | d8cb5486 | 2012-04-18 17:16:39 +0800 | [diff] [blame] | 394 | if (algo_name[name_len - 1] == '\n') |
| 395 | algo_name[name_len - 1] = '\0'; |
| 396 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 397 | bat_algo_ops = batadv_algo_get(algo_name); |
Marek Lindner | d419be1 | 2011-12-10 19:45:53 +0800 | [diff] [blame] | 398 | if (!bat_algo_ops) { |
Marek Lindner | d8cb5486 | 2012-04-18 17:16:39 +0800 | [diff] [blame] | 399 | pr_err("Routing algorithm '%s' is not supported\n", algo_name); |
Marek Lindner | d419be1 | 2011-12-10 19:45:53 +0800 | [diff] [blame] | 400 | return -EINVAL; |
| 401 | } |
| 402 | |
Marek Lindner | d8cb5486 | 2012-04-18 17:16:39 +0800 | [diff] [blame] | 403 | return param_set_copystring(algo_name, kp); |
Marek Lindner | d419be1 | 2011-12-10 19:45:53 +0800 | [diff] [blame] | 404 | } |
| 405 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 406 | static const struct kernel_param_ops batadv_param_ops_ra = { |
| 407 | .set = batadv_param_set_ra, |
Marek Lindner | d419be1 | 2011-12-10 19:45:53 +0800 | [diff] [blame] | 408 | .get = param_get_string, |
| 409 | }; |
| 410 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 411 | static struct kparam_string batadv_param_string_ra = { |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 412 | .maxlen = sizeof(batadv_routing_algo), |
| 413 | .string = batadv_routing_algo, |
Marek Lindner | d419be1 | 2011-12-10 19:45:53 +0800 | [diff] [blame] | 414 | }; |
| 415 | |
Sven Eckelmann | ee11ad6 | 2012-05-16 20:23:19 +0200 | [diff] [blame] | 416 | module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra, |
| 417 | 0644); |
| 418 | module_init(batadv_init); |
| 419 | module_exit(batadv_exit); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 420 | |
| 421 | MODULE_LICENSE("GPL"); |
| 422 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 423 | MODULE_AUTHOR(BATADV_DRIVER_AUTHOR); |
| 424 | MODULE_DESCRIPTION(BATADV_DRIVER_DESC); |
| 425 | MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE); |
| 426 | MODULE_VERSION(BATADV_SOURCE_VERSION); |