Simon Wunderlich | e19f975 | 2014-01-04 18:04:25 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [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 |
Antonio Quartulli | ebf38fb | 2013-11-03 20:40:48 +0100 | [diff] [blame] | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | #include "main.h" |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 19 | #include "translation-table.h" |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 20 | #include "originator.h" |
| 21 | #include "routing.h" |
| 22 | #include "gateway_common.h" |
| 23 | #include "gateway_client.h" |
| 24 | #include "hard-interface.h" |
| 25 | #include "send.h" |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 26 | #include "bat_algo.h" |
Martin Hundebøll | d56b170 | 2013-01-25 11:12:39 +0100 | [diff] [blame] | 27 | #include "network-coding.h" |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 28 | |
Antonio Quartulli | 791c2a2 | 2013-08-17 12:44:44 +0200 | [diff] [blame] | 29 | |
| 30 | /** |
| 31 | * batadv_dup_status - duplicate status |
| 32 | * @BATADV_NO_DUP: the packet is a duplicate |
| 33 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the |
| 34 | * neighbor) |
| 35 | * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor |
| 36 | * @BATADV_PROTECTED: originator is currently protected (after reboot) |
| 37 | */ |
| 38 | enum batadv_dup_status { |
| 39 | BATADV_NO_DUP = 0, |
| 40 | BATADV_ORIG_DUP, |
| 41 | BATADV_NEIGH_DUP, |
| 42 | BATADV_PROTECTED, |
| 43 | }; |
| 44 | |
Antonio Quartulli | 24a5dee | 2013-04-08 09:38:12 +0200 | [diff] [blame] | 45 | /** |
| 46 | * batadv_ring_buffer_set - update the ring buffer with the given value |
| 47 | * @lq_recv: pointer to the ring buffer |
| 48 | * @lq_index: index to store the value at |
| 49 | * @value: value to store in the ring buffer |
| 50 | */ |
| 51 | static void batadv_ring_buffer_set(uint8_t lq_recv[], uint8_t *lq_index, |
| 52 | uint8_t value) |
| 53 | { |
| 54 | lq_recv[*lq_index] = value; |
| 55 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * batadv_ring_buffer_set - compute the average of all non-zero values stored |
| 60 | * in the given ring buffer |
| 61 | * @lq_recv: pointer to the ring buffer |
| 62 | * |
| 63 | * Returns computed average value. |
| 64 | */ |
| 65 | static uint8_t batadv_ring_buffer_avg(const uint8_t lq_recv[]) |
| 66 | { |
| 67 | const uint8_t *ptr; |
| 68 | uint16_t count = 0, i = 0, sum = 0; |
| 69 | |
| 70 | ptr = lq_recv; |
| 71 | |
| 72 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { |
| 73 | if (*ptr != 0) { |
| 74 | count++; |
| 75 | sum += *ptr; |
| 76 | } |
| 77 | |
| 78 | i++; |
| 79 | ptr++; |
| 80 | } |
| 81 | |
| 82 | if (count == 0) |
| 83 | return 0; |
| 84 | |
| 85 | return (uint8_t)(sum / count); |
| 86 | } |
David S. Miller | d98cae64e | 2013-06-19 16:49:39 -0700 | [diff] [blame] | 87 | |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 88 | /** |
Antonio Quartulli | d0015fd | 2013-09-03 11:10:23 +0200 | [diff] [blame] | 89 | * batadv_iv_ogm_orig_free - free the private resources allocated for this |
| 90 | * orig_node |
| 91 | * @orig_node: the orig_node for which the resources have to be free'd |
| 92 | */ |
| 93 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) |
| 94 | { |
| 95 | kfree(orig_node->bat_iv.bcast_own); |
| 96 | kfree(orig_node->bat_iv.bcast_own_sum); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to |
| 101 | * include the new hard-interface |
| 102 | * @orig_node: the orig_node that has to be changed |
| 103 | * @max_if_num: the current amount of interfaces |
| 104 | * |
| 105 | * Returns 0 on success, a negative error code otherwise. |
| 106 | */ |
| 107 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, |
| 108 | int max_if_num) |
| 109 | { |
| 110 | void *data_ptr; |
| 111 | size_t data_size, old_size; |
| 112 | int ret = -ENOMEM; |
| 113 | |
| 114 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
| 115 | |
| 116 | data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS; |
| 117 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
| 118 | data_ptr = kmalloc(data_size, GFP_ATOMIC); |
| 119 | if (!data_ptr) |
| 120 | goto unlock; |
| 121 | |
| 122 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); |
| 123 | kfree(orig_node->bat_iv.bcast_own); |
| 124 | orig_node->bat_iv.bcast_own = data_ptr; |
| 125 | |
| 126 | data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); |
| 127 | if (!data_ptr) { |
| 128 | kfree(orig_node->bat_iv.bcast_own); |
| 129 | goto unlock; |
| 130 | } |
| 131 | |
| 132 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, |
| 133 | (max_if_num - 1) * sizeof(uint8_t)); |
| 134 | kfree(orig_node->bat_iv.bcast_own_sum); |
| 135 | orig_node->bat_iv.bcast_own_sum = data_ptr; |
| 136 | |
| 137 | ret = 0; |
| 138 | |
| 139 | unlock: |
| 140 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
| 141 | |
| 142 | return ret; |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to |
| 147 | * exclude the removed interface |
| 148 | * @orig_node: the orig_node that has to be changed |
| 149 | * @max_if_num: the current amount of interfaces |
| 150 | * @del_if_num: the index of the interface being removed |
| 151 | * |
| 152 | * Returns 0 on success, a negative error code otherwise. |
| 153 | */ |
| 154 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, |
| 155 | int max_if_num, int del_if_num) |
| 156 | { |
| 157 | int chunk_size, ret = -ENOMEM, if_offset; |
| 158 | void *data_ptr = NULL; |
| 159 | |
| 160 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
| 161 | |
| 162 | /* last interface was removed */ |
| 163 | if (max_if_num == 0) |
| 164 | goto free_bcast_own; |
| 165 | |
| 166 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; |
| 167 | data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC); |
| 168 | if (!data_ptr) |
| 169 | goto unlock; |
| 170 | |
| 171 | /* copy first part */ |
| 172 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); |
| 173 | |
| 174 | /* copy second part */ |
| 175 | memcpy((char *)data_ptr + del_if_num * chunk_size, |
| 176 | orig_node->bat_iv.bcast_own + ((del_if_num + 1) * chunk_size), |
| 177 | (max_if_num - del_if_num) * chunk_size); |
| 178 | |
| 179 | free_bcast_own: |
| 180 | kfree(orig_node->bat_iv.bcast_own); |
| 181 | orig_node->bat_iv.bcast_own = data_ptr; |
| 182 | |
| 183 | if (max_if_num == 0) |
| 184 | goto free_own_sum; |
| 185 | |
| 186 | data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); |
| 187 | if (!data_ptr) { |
| 188 | kfree(orig_node->bat_iv.bcast_own); |
| 189 | goto unlock; |
| 190 | } |
| 191 | |
| 192 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, |
| 193 | del_if_num * sizeof(uint8_t)); |
| 194 | |
| 195 | if_offset = (del_if_num + 1) * sizeof(uint8_t); |
| 196 | memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t), |
| 197 | orig_node->bat_iv.bcast_own_sum + if_offset, |
| 198 | (max_if_num - del_if_num) * sizeof(uint8_t)); |
| 199 | |
| 200 | free_own_sum: |
| 201 | kfree(orig_node->bat_iv.bcast_own_sum); |
| 202 | orig_node->bat_iv.bcast_own_sum = data_ptr; |
| 203 | |
| 204 | ret = 0; |
| 205 | unlock: |
| 206 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
| 207 | |
| 208 | return ret; |
| 209 | } |
| 210 | |
| 211 | /** |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 212 | * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator |
| 213 | * @bat_priv: the bat priv with all the soft interface information |
| 214 | * @addr: mac address of the originator |
| 215 | * |
| 216 | * Returns the originator object corresponding to the passed mac address or NULL |
| 217 | * on failure. |
| 218 | * If the object does not exists it is created an initialised. |
| 219 | */ |
| 220 | static struct batadv_orig_node * |
| 221 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const uint8_t *addr) |
| 222 | { |
| 223 | struct batadv_orig_node *orig_node; |
| 224 | int size, hash_added; |
| 225 | |
| 226 | orig_node = batadv_orig_hash_find(bat_priv, addr); |
| 227 | if (orig_node) |
| 228 | return orig_node; |
| 229 | |
| 230 | orig_node = batadv_orig_node_new(bat_priv, addr); |
| 231 | if (!orig_node) |
| 232 | return NULL; |
| 233 | |
| 234 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); |
| 235 | |
| 236 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; |
| 237 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); |
| 238 | if (!orig_node->bat_iv.bcast_own) |
| 239 | goto free_orig_node; |
| 240 | |
| 241 | size = bat_priv->num_ifaces * sizeof(uint8_t); |
| 242 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); |
| 243 | if (!orig_node->bat_iv.bcast_own_sum) |
| 244 | goto free_bcast_own; |
| 245 | |
| 246 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, |
| 247 | batadv_choose_orig, orig_node, |
| 248 | &orig_node->hash_entry); |
| 249 | if (hash_added != 0) |
| 250 | goto free_bcast_own; |
| 251 | |
| 252 | return orig_node; |
| 253 | |
| 254 | free_bcast_own: |
| 255 | kfree(orig_node->bat_iv.bcast_own); |
| 256 | free_orig_node: |
| 257 | batadv_orig_node_free_ref(orig_node); |
| 258 | |
| 259 | return NULL; |
| 260 | } |
| 261 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 262 | static struct batadv_neigh_node * |
| 263 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, |
| 264 | const uint8_t *neigh_addr, |
| 265 | struct batadv_orig_node *orig_node, |
Antonio Quartulli | 863dd7a | 2013-03-25 13:49:46 +0100 | [diff] [blame] | 266 | struct batadv_orig_node *orig_neigh) |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 267 | { |
Antonio Quartulli | 0538f75 | 2013-09-02 12:15:01 +0200 | [diff] [blame] | 268 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Antonio Quartulli | 08bf0ed | 2014-01-29 11:25:12 +0100 | [diff] [blame^] | 269 | struct batadv_neigh_node *neigh_node, *tmp_neigh_node; |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 270 | |
Antonio Quartulli | 0538f75 | 2013-09-02 12:15:01 +0200 | [diff] [blame] | 271 | neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr, orig_node); |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 272 | if (!neigh_node) |
| 273 | goto out; |
| 274 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 275 | if (!atomic_inc_not_zero(&hard_iface->refcount)) { |
| 276 | kfree(neigh_node); |
| 277 | neigh_node = NULL; |
| 278 | goto out; |
| 279 | } |
| 280 | |
| 281 | neigh_node->orig_node = orig_neigh; |
| 282 | neigh_node->if_incoming = hard_iface; |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 283 | |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 284 | spin_lock_bh(&orig_node->neigh_list_lock); |
Antonio Quartulli | 08bf0ed | 2014-01-29 11:25:12 +0100 | [diff] [blame^] | 285 | tmp_neigh_node = batadv_neigh_node_get(orig_node, hard_iface, |
| 286 | neigh_addr); |
| 287 | if (!tmp_neigh_node) { |
| 288 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); |
| 289 | } else { |
| 290 | kfree(neigh_node); |
| 291 | batadv_hardif_free_ref(hard_iface); |
| 292 | neigh_node = tmp_neigh_node; |
| 293 | } |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 294 | spin_unlock_bh(&orig_node->neigh_list_lock); |
| 295 | |
Antonio Quartulli | 08bf0ed | 2014-01-29 11:25:12 +0100 | [diff] [blame^] | 296 | if (!tmp_neigh_node) |
| 297 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 298 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", |
| 299 | neigh_addr, orig_node->orig, |
| 300 | hard_iface->net_dev->name); |
| 301 | |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 302 | out: |
| 303 | return neigh_node; |
| 304 | } |
| 305 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 306 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 307 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 308 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 309 | unsigned char *ogm_buff; |
Marek Lindner | d7d32ec | 2012-02-07 17:20:46 +0800 | [diff] [blame] | 310 | uint32_t random_seqno; |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 311 | int res = -ENOMEM; |
Marek Lindner | d7d32ec | 2012-02-07 17:20:46 +0800 | [diff] [blame] | 312 | |
| 313 | /* randomize initial seqno to avoid collision */ |
| 314 | get_random_bytes(&random_seqno, sizeof(random_seqno)); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 315 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 316 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 317 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
| 318 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); |
| 319 | if (!ogm_buff) |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 320 | goto out; |
| 321 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 322 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
| 323 | |
| 324 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 325 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
| 326 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; |
| 327 | batadv_ogm_packet->ttl = 2; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 328 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 329 | batadv_ogm_packet->reserved = 0; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 330 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 331 | |
| 332 | res = 0; |
| 333 | |
| 334 | out: |
| 335 | return res; |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 336 | } |
| 337 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 338 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 339 | { |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 340 | kfree(hard_iface->bat_iv.ogm_buff); |
| 341 | hard_iface->bat_iv.ogm_buff = NULL; |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 342 | } |
| 343 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 344 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 345 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 346 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 347 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 348 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 349 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 350 | memcpy(batadv_ogm_packet->orig, |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 351 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 352 | memcpy(batadv_ogm_packet->prev_sender, |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 353 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
| 354 | } |
| 355 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 356 | static void |
| 357 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 358 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 359 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 360 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 361 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 362 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 363 | batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 364 | batadv_ogm_packet->ttl = BATADV_TTL; |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 365 | } |
| 366 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 367 | /* when do we schedule our own ogm to be sent */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 368 | static unsigned long |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 369 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 370 | { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 371 | unsigned int msecs; |
| 372 | |
| 373 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; |
Akinobu Mita | e76e432 | 2012-12-24 11:14:07 +0900 | [diff] [blame] | 374 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 375 | |
| 376 | return jiffies + msecs_to_jiffies(msecs); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | /* when do we schedule a ogm packet to be sent */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 380 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 381 | { |
Akinobu Mita | e76e432 | 2012-12-24 11:14:07 +0900 | [diff] [blame] | 382 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | /* apply hop penalty for a normal link */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 386 | static uint8_t batadv_hop_penalty(uint8_t tq, |
| 387 | const struct batadv_priv *bat_priv) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 388 | { |
| 389 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 390 | int new_tq; |
| 391 | |
| 392 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); |
| 393 | new_tq /= BATADV_TQ_MAX_VALUE; |
| 394 | |
| 395 | return new_tq; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 396 | } |
| 397 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 398 | /* is there another aggregated packet here? */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 399 | static int batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 400 | __be16 tvlv_len) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 401 | { |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 402 | int next_buff_pos = 0; |
| 403 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 404 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 405 | next_buff_pos += ntohs(tvlv_len); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 406 | |
| 407 | return (next_buff_pos <= packet_len) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 408 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 409 | } |
| 410 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 411 | /* send a batman ogm to a given interface */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 412 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
| 413 | struct batadv_hard_iface *hard_iface) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 414 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 415 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 416 | char *fwd_str; |
| 417 | uint8_t packet_num; |
| 418 | int16_t buff_pos; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 419 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 420 | struct sk_buff *skb; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 421 | uint8_t *packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 422 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 423 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 424 | return; |
| 425 | |
| 426 | packet_num = 0; |
| 427 | buff_pos = 0; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 428 | packet_pos = forw_packet->skb->data; |
| 429 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 430 | |
| 431 | /* adjust all flags and log packets */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 432 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 433 | batadv_ogm_packet->tvlv_len)) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 434 | /* we might have aggregated direct link packets with an |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 435 | * ordinary base packet |
| 436 | */ |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 437 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
| 438 | forw_packet->if_incoming == hard_iface) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 439 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 440 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 441 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 442 | |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 443 | if (packet_num > 0 || !forw_packet->own) |
| 444 | fwd_str = "Forwarding"; |
| 445 | else |
| 446 | fwd_str = "Sending own"; |
| 447 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 448 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 449 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 450 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 451 | batadv_ogm_packet->orig, |
| 452 | ntohl(batadv_ogm_packet->seqno), |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 453 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 454 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 455 | "on" : "off"), |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 456 | hard_iface->net_dev->name, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 457 | hard_iface->net_dev->dev_addr); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 458 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 459 | buff_pos += BATADV_OGM_HLEN; |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 460 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 461 | packet_num++; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 462 | packet_pos = forw_packet->skb->data + buff_pos; |
| 463 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /* create clone because function is called more than once */ |
| 467 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 468 | if (skb) { |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 469 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
| 470 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 471 | skb->len + ETH_HLEN); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 472 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 473 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | /* send a batman ogm packet */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 477 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 478 | { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 479 | struct net_device *soft_iface; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 480 | struct batadv_priv *bat_priv; |
| 481 | struct batadv_hard_iface *primary_if = NULL; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 482 | |
| 483 | if (!forw_packet->if_incoming) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 484 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 485 | goto out; |
| 486 | } |
| 487 | |
| 488 | soft_iface = forw_packet->if_incoming->soft_iface; |
| 489 | bat_priv = netdev_priv(soft_iface); |
| 490 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 491 | if (WARN_ON(!forw_packet->if_outgoing)) |
| 492 | goto out; |
| 493 | |
| 494 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
| 495 | goto out; |
| 496 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 497 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 498 | goto out; |
| 499 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 500 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 501 | if (!primary_if) |
| 502 | goto out; |
| 503 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 504 | /* only for one specific outgoing interface */ |
| 505 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 506 | |
| 507 | out: |
| 508 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 509 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 510 | } |
| 511 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 512 | /** |
| 513 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an |
| 514 | * existing forward packet |
| 515 | * @new_bat_ogm_packet: OGM packet to be aggregated |
| 516 | * @bat_priv: the bat priv with all the soft interface information |
| 517 | * @packet_len: (total) length of the OGM |
| 518 | * @send_time: timestamp (jiffies) when the packet is to be sent |
| 519 | * @direktlink: true if this is a direct link packet |
| 520 | * @if_incoming: interface where the packet was received |
| 521 | * @if_outgoing: interface for which the retransmission should be considered |
| 522 | * @forw_packet: the forwarded packet which should be checked |
| 523 | * |
| 524 | * Returns true if new_packet can be aggregated with forw_packet |
| 525 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 526 | static bool |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 527 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 528 | struct batadv_priv *bat_priv, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 529 | int packet_len, unsigned long send_time, |
| 530 | bool directlink, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 531 | const struct batadv_hard_iface *if_incoming, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 532 | const struct batadv_hard_iface *if_outgoing, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 533 | const struct batadv_forw_packet *forw_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 534 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 535 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 536 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 537 | struct batadv_hard_iface *primary_if = NULL; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 538 | bool res = false; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 539 | unsigned long aggregation_end_time; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 540 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 541 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 542 | aggregation_end_time = send_time; |
| 543 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 544 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 545 | /* we can aggregate the current packet to this aggregated packet |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 546 | * if: |
| 547 | * |
| 548 | * - the send time is within our MAX_AGGREGATION_MS time |
| 549 | * - the resulting packet wont be bigger than |
| 550 | * MAX_AGGREGATION_BYTES |
| 551 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 552 | if (time_before(send_time, forw_packet->send_time) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 553 | time_after_eq(aggregation_end_time, forw_packet->send_time) && |
| 554 | (aggregated_bytes <= BATADV_MAX_AGGREGATION_BYTES)) { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 555 | /* check aggregation compatibility |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 556 | * -> direct link packets are broadcasted on |
| 557 | * their interface only |
| 558 | * -> aggregate packet if the current packet is |
| 559 | * a "global" packet as well as the base |
| 560 | * packet |
| 561 | */ |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 562 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 563 | if (!primary_if) |
| 564 | goto out; |
| 565 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 566 | /* packet is not leaving on the same interface. */ |
| 567 | if (forw_packet->if_outgoing != if_outgoing) |
| 568 | goto out; |
| 569 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 570 | /* packets without direct link flag and high TTL |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 571 | * are flooded through the net |
| 572 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 573 | if ((!directlink) && |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 574 | (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) && |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 575 | (batadv_ogm_packet->ttl != 1) && |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 576 | |
| 577 | /* own packets originating non-primary |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 578 | * interfaces leave only that interface |
| 579 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 580 | ((!forw_packet->own) || |
| 581 | (forw_packet->if_incoming == primary_if))) { |
| 582 | res = true; |
| 583 | goto out; |
| 584 | } |
| 585 | |
| 586 | /* if the incoming packet is sent via this one |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 587 | * interface only - we still can aggregate |
| 588 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 589 | if ((directlink) && |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 590 | (new_bat_ogm_packet->ttl == 1) && |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 591 | (forw_packet->if_incoming == if_incoming) && |
| 592 | |
| 593 | /* packets from direct neighbors or |
| 594 | * own secondary interface packets |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 595 | * (= secondary interface packets in general) |
| 596 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 597 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 598 | (forw_packet->own && |
| 599 | forw_packet->if_incoming != primary_if))) { |
| 600 | res = true; |
| 601 | goto out; |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | out: |
| 606 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 607 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 608 | return res; |
| 609 | } |
| 610 | |
Simon Wunderlich | 1b371d1 | 2014-01-15 21:17:54 +0100 | [diff] [blame] | 611 | /** |
| 612 | * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 613 | * packet to it. |
| 614 | * @packet_buff: pointer to the OGM |
| 615 | * @packet_len: (total) length of the OGM |
| 616 | * @send_time: timestamp (jiffies) when the packet is to be sent |
| 617 | * @direct_link: whether this OGM has direct link status |
| 618 | * @if_incoming: interface where the packet was received |
| 619 | * @if_outgoing: interface for which the retransmission should be considered |
| 620 | * @own_packet: true if it is a self-generated ogm |
| 621 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 622 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
| 623 | int packet_len, unsigned long send_time, |
| 624 | bool direct_link, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 625 | struct batadv_hard_iface *if_incoming, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 626 | struct batadv_hard_iface *if_outgoing, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 627 | int own_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 628 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 629 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 630 | struct batadv_forw_packet *forw_packet_aggr; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 631 | unsigned char *skb_buff; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 632 | unsigned int skb_size; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 633 | |
| 634 | if (!atomic_inc_not_zero(&if_incoming->refcount)) |
| 635 | return; |
| 636 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 637 | if (!atomic_inc_not_zero(&if_outgoing->refcount)) |
| 638 | goto out_free_incoming; |
| 639 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 640 | /* own packet should always be scheduled */ |
| 641 | if (!own_packet) { |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 642 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 643 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 644 | "batman packet queue full\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 645 | goto out; |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); |
| 650 | if (!forw_packet_aggr) { |
| 651 | if (!own_packet) |
| 652 | atomic_inc(&bat_priv->batman_queue_left); |
| 653 | goto out; |
| 654 | } |
| 655 | |
| 656 | if ((atomic_read(&bat_priv->aggregated_ogms)) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 657 | (packet_len < BATADV_MAX_AGGREGATION_BYTES)) |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 658 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 659 | else |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 660 | skb_size = packet_len; |
| 661 | |
Antonio Quartulli | 41ab6c4 | 2013-04-02 22:28:44 +0200 | [diff] [blame] | 662 | skb_size += ETH_HLEN; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 663 | |
Antonio Quartulli | 41ab6c4 | 2013-04-02 22:28:44 +0200 | [diff] [blame] | 664 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 665 | if (!forw_packet_aggr->skb) { |
| 666 | if (!own_packet) |
| 667 | atomic_inc(&bat_priv->batman_queue_left); |
| 668 | kfree(forw_packet_aggr); |
| 669 | goto out; |
| 670 | } |
Simon Wunderlich | c54f38c | 2013-07-29 17:56:44 +0200 | [diff] [blame] | 671 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
Antonio Quartulli | 41ab6c4 | 2013-04-02 22:28:44 +0200 | [diff] [blame] | 672 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 673 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 674 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
| 675 | forw_packet_aggr->packet_len = packet_len; |
| 676 | memcpy(skb_buff, packet_buff, packet_len); |
| 677 | |
| 678 | forw_packet_aggr->own = own_packet; |
| 679 | forw_packet_aggr->if_incoming = if_incoming; |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 680 | forw_packet_aggr->if_outgoing = if_outgoing; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 681 | forw_packet_aggr->num_packets = 0; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 682 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 683 | forw_packet_aggr->send_time = send_time; |
| 684 | |
| 685 | /* save packet direct link flag status */ |
| 686 | if (direct_link) |
| 687 | forw_packet_aggr->direct_link_flags |= 1; |
| 688 | |
| 689 | /* add new packet to packet list */ |
| 690 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| 691 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); |
| 692 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 693 | |
| 694 | /* start timer for this packet */ |
| 695 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 696 | batadv_send_outstanding_bat_ogm_packet); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 697 | queue_delayed_work(batadv_event_workqueue, |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 698 | &forw_packet_aggr->delayed_work, |
| 699 | send_time - jiffies); |
| 700 | |
| 701 | return; |
| 702 | out: |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 703 | batadv_hardif_free_ref(if_outgoing); |
| 704 | out_free_incoming: |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 705 | batadv_hardif_free_ref(if_incoming); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 706 | } |
| 707 | |
| 708 | /* aggregate a new packet into the existing ogm packet */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 709 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 710 | const unsigned char *packet_buff, |
| 711 | int packet_len, bool direct_link) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 712 | { |
| 713 | unsigned char *skb_buff; |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 714 | unsigned long new_direct_link_flag; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 715 | |
| 716 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
| 717 | memcpy(skb_buff, packet_buff, packet_len); |
| 718 | forw_packet_aggr->packet_len += packet_len; |
| 719 | forw_packet_aggr->num_packets++; |
| 720 | |
| 721 | /* save packet direct link flag status */ |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 722 | if (direct_link) { |
| 723 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); |
| 724 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; |
| 725 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 726 | } |
| 727 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 728 | /** |
| 729 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission |
| 730 | * @bat_priv: the bat priv with all the soft interface information |
| 731 | * @packet_buff: pointer to the OGM |
| 732 | * @packet_len: (total) length of the OGM |
| 733 | * @if_incoming: interface where the packet was received |
| 734 | * @if_outgoing: interface for which the retransmission should be considered |
| 735 | * @own_packet: true if it is a self-generated ogm |
| 736 | * @send_time: timestamp (jiffies) when the packet is to be sent |
| 737 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 738 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 739 | unsigned char *packet_buff, |
| 740 | int packet_len, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 741 | struct batadv_hard_iface *if_incoming, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 742 | struct batadv_hard_iface *if_outgoing, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 743 | int own_packet, unsigned long send_time) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 744 | { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 745 | /* _aggr -> pointer to the packet we want to aggregate with |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 746 | * _pos -> pointer to the position in the queue |
| 747 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 748 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
| 749 | struct batadv_forw_packet *forw_packet_pos = NULL; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 750 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 751 | bool direct_link; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 752 | unsigned long max_aggregation_jiffies; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 753 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 754 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
| 755 | direct_link = batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 756 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 757 | |
| 758 | /* find position for the packet in the forward queue */ |
| 759 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| 760 | /* own packets are not to be aggregated */ |
| 761 | if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 762 | hlist_for_each_entry(forw_packet_pos, |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 763 | &bat_priv->forw_bat_list, list) { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 764 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 765 | bat_priv, packet_len, |
| 766 | send_time, direct_link, |
| 767 | if_incoming, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 768 | if_outgoing, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 769 | forw_packet_pos)) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 770 | forw_packet_aggr = forw_packet_pos; |
| 771 | break; |
| 772 | } |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | /* nothing to aggregate with - either aggregation disabled or no |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 777 | * suitable aggregation packet found |
| 778 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 779 | if (!forw_packet_aggr) { |
| 780 | /* the following section can run without the lock */ |
| 781 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 782 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 783 | /* if we could not aggregate this packet with one of the others |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 784 | * we hold it back for a while, so that it might be aggregated |
| 785 | * later on |
| 786 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 787 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
| 788 | send_time += max_aggregation_jiffies; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 789 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 790 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
| 791 | send_time, direct_link, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 792 | if_incoming, if_outgoing, |
| 793 | own_packet); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 794 | } else { |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 795 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
| 796 | packet_len, direct_link); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 797 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 798 | } |
| 799 | } |
| 800 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 801 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 802 | const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 803 | struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 804 | bool is_single_hop_neigh, |
| 805 | bool is_from_best_next_hop, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 806 | struct batadv_hard_iface *if_incoming, |
| 807 | struct batadv_hard_iface *if_outgoing) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 808 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 809 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 810 | uint16_t tvlv_len; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 811 | |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 812 | if (batadv_ogm_packet->ttl <= 1) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 813 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 814 | return; |
| 815 | } |
| 816 | |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 817 | if (!is_from_best_next_hop) { |
| 818 | /* Mark the forwarded packet when it is not coming from our |
| 819 | * best next hop. We still need to forward the packet for our |
| 820 | * neighbor link quality detection to work in case the packet |
| 821 | * originated from a single hop neighbor. Otherwise we can |
| 822 | * simply drop the ogm. |
| 823 | */ |
| 824 | if (is_single_hop_neigh) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 825 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 826 | else |
| 827 | return; |
| 828 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 829 | |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 830 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 831 | |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 832 | batadv_ogm_packet->ttl--; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 833 | memcpy(batadv_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 834 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 835 | /* apply hop penalty */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 836 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 837 | bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 838 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 839 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 840 | "Forwarding packet: tq: %i, ttl: %i\n", |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 841 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 842 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 843 | /* switch of primaries first hop flag when forwarding */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 844 | batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; |
Marek Lindner | 75cd33f | 2012-03-01 15:35:16 +0800 | [diff] [blame] | 845 | if (is_single_hop_neigh) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 846 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 847 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 848 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 849 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 850 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 851 | BATADV_OGM_HLEN + tvlv_len, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 852 | if_incoming, if_outgoing, 0, |
| 853 | batadv_iv_ogm_fwd_send_time()); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 854 | } |
| 855 | |
Antonio Quartulli | d989661 | 2013-04-17 17:44:43 +0200 | [diff] [blame] | 856 | /** |
| 857 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for |
| 858 | * the given interface |
| 859 | * @hard_iface: the interface for which the windows have to be shifted |
| 860 | */ |
| 861 | static void |
| 862 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) |
| 863 | { |
| 864 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
| 865 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
| 866 | struct hlist_head *head; |
| 867 | struct batadv_orig_node *orig_node; |
| 868 | unsigned long *word; |
| 869 | uint32_t i; |
| 870 | size_t word_index; |
| 871 | uint8_t *w; |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 872 | int if_num; |
Antonio Quartulli | d989661 | 2013-04-17 17:44:43 +0200 | [diff] [blame] | 873 | |
| 874 | for (i = 0; i < hash->size; i++) { |
| 875 | head = &hash->table[i]; |
| 876 | |
| 877 | rcu_read_lock(); |
| 878 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 879 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
Antonio Quartulli | d989661 | 2013-04-17 17:44:43 +0200 | [diff] [blame] | 880 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 881 | word = &(orig_node->bat_iv.bcast_own[word_index]); |
Antonio Quartulli | d989661 | 2013-04-17 17:44:43 +0200 | [diff] [blame] | 882 | |
| 883 | batadv_bit_get_packet(bat_priv, word, 1, 0); |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 884 | if_num = hard_iface->if_num; |
| 885 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; |
Antonio Quartulli | d989661 | 2013-04-17 17:44:43 +0200 | [diff] [blame] | 886 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 887 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
Antonio Quartulli | d989661 | 2013-04-17 17:44:43 +0200 | [diff] [blame] | 888 | } |
| 889 | rcu_read_unlock(); |
| 890 | } |
| 891 | } |
| 892 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 893 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 894 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 895 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 896 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 897 | struct batadv_ogm_packet *batadv_ogm_packet; |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 898 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 899 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 900 | uint32_t seqno; |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 901 | uint16_t tvlv_len = 0; |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 902 | unsigned long send_time; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 903 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 904 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 905 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 906 | if (hard_iface == primary_if) { |
| 907 | /* tt changes have to be committed before the tvlv data is |
| 908 | * appended as it may alter the tt tvlv container |
| 909 | */ |
| 910 | batadv_tt_local_commit_changes(bat_priv); |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 911 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
| 912 | ogm_buff_len, |
| 913 | BATADV_OGM_HLEN); |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 914 | } |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 915 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 916 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 917 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 918 | |
| 919 | /* change sequence number to network order */ |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 920 | seqno = (uint32_t)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 921 | batadv_ogm_packet->seqno = htonl(seqno); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 922 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 923 | |
Antonio Quartulli | d989661 | 2013-04-17 17:44:43 +0200 | [diff] [blame] | 924 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 925 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 926 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
| 927 | |
| 928 | if (hard_iface != primary_if) { |
| 929 | /* OGMs from secondary interfaces are only scheduled on their |
| 930 | * respective interfaces. |
| 931 | */ |
| 932 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, |
| 933 | hard_iface, hard_iface, 1, send_time); |
| 934 | goto out; |
| 935 | } |
| 936 | |
| 937 | /* OGMs from primary interfaces are scheduled on all |
| 938 | * interfaces. |
| 939 | */ |
| 940 | rcu_read_lock(); |
| 941 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { |
| 942 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) |
| 943 | continue; |
| 944 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
| 945 | *ogm_buff_len, hard_iface, |
| 946 | tmp_hard_iface, 1, send_time); |
| 947 | } |
| 948 | rcu_read_unlock(); |
| 949 | |
| 950 | out: |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 951 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 952 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 953 | } |
| 954 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 955 | /** |
| 956 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an |
| 957 | * originator |
| 958 | * @bat_priv: the bat priv with all the soft interface information |
| 959 | * @orig_node: the orig node who originally emitted the ogm packet |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 960 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 961 | * @ethhdr: Ethernet header of the OGM |
| 962 | * @batadv_ogm_packet: the ogm packet |
| 963 | * @if_incoming: interface where the packet was received |
| 964 | * @if_outgoing: interface for which the retransmission should be considered |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 965 | * @dup_status: the duplicate status of this ogm packet. |
| 966 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 967 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 968 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
| 969 | struct batadv_orig_node *orig_node, |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 970 | struct batadv_orig_ifinfo *orig_ifinfo, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 971 | const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 972 | const struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 973 | struct batadv_hard_iface *if_incoming, |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 974 | struct batadv_hard_iface *if_outgoing, |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 975 | enum batadv_dup_status dup_status) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 976 | { |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 977 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
| 978 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 979 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; |
| 980 | struct batadv_neigh_node *router = NULL; |
| 981 | struct batadv_orig_node *orig_node_tmp; |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 982 | int if_num; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 983 | uint8_t sum_orig, sum_neigh; |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 984 | uint8_t *neigh_addr; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 985 | uint8_t tq_avg; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 986 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 987 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 988 | "update_originator(): Searching and updating originator entry of received packet\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 989 | |
| 990 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 991 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 992 | &orig_node->neigh_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 993 | neigh_addr = tmp_neigh_node->addr; |
| 994 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
| 995 | tmp_neigh_node->if_incoming == if_incoming && |
| 996 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { |
Antonio Quartulli | 38dc40e | 2013-03-30 17:22:00 +0100 | [diff] [blame] | 997 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 998 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 999 | neigh_node = tmp_neigh_node; |
| 1000 | continue; |
| 1001 | } |
| 1002 | |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1003 | if (dup_status != BATADV_NO_DUP) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1004 | continue; |
| 1005 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1006 | /* only update the entry for this outgoing interface */ |
| 1007 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, |
| 1008 | if_outgoing); |
| 1009 | if (!neigh_ifinfo) |
| 1010 | continue; |
| 1011 | |
| 1012 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); |
| 1013 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, |
| 1014 | &neigh_ifinfo->bat_iv.tq_index, 0); |
| 1015 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
| 1016 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; |
| 1017 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); |
| 1018 | |
| 1019 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
| 1020 | neigh_ifinfo = NULL; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1021 | } |
| 1022 | |
| 1023 | if (!neigh_node) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1024 | struct batadv_orig_node *orig_tmp; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1025 | |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1026 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1027 | if (!orig_tmp) |
| 1028 | goto unlock; |
| 1029 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1030 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
| 1031 | ethhdr->h_source, |
Antonio Quartulli | 863dd7a | 2013-03-25 13:49:46 +0100 | [diff] [blame] | 1032 | orig_node, orig_tmp); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1033 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1034 | batadv_orig_node_free_ref(orig_tmp); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1035 | if (!neigh_node) |
| 1036 | goto unlock; |
| 1037 | } else |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1038 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1039 | "Updating existing last-hop neighbor of originator\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1040 | |
| 1041 | rcu_read_unlock(); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1042 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
| 1043 | if (!neigh_ifinfo) |
| 1044 | goto out; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1045 | |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 1046 | neigh_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1047 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1048 | spin_lock_bh(&neigh_node->ifinfo_lock); |
| 1049 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, |
| 1050 | &neigh_ifinfo->bat_iv.tq_index, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1051 | batadv_ogm_packet->tq); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1052 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
| 1053 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; |
| 1054 | spin_unlock_bh(&neigh_node->ifinfo_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1055 | |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1056 | if (dup_status == BATADV_NO_DUP) { |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1057 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1058 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1059 | } |
| 1060 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1061 | /* if this neighbor already is our next hop there is nothing |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1062 | * to change |
| 1063 | */ |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1064 | router = batadv_orig_router_get(orig_node, if_outgoing); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1065 | if (router == neigh_node) |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 1066 | goto out; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1067 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1068 | if (router) { |
| 1069 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); |
| 1070 | if (!router_ifinfo) |
| 1071 | goto out; |
| 1072 | |
| 1073 | /* if this neighbor does not offer a better TQ we won't |
| 1074 | * consider it |
| 1075 | */ |
| 1076 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) |
| 1077 | goto out; |
| 1078 | } |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1079 | |
| 1080 | /* if the TQ is the same and the link not more symmetric we |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1081 | * won't consider it either |
| 1082 | */ |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1083 | if (router_ifinfo && |
| 1084 | (neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg)) { |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1085 | orig_node_tmp = router->orig_node; |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1086 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 1087 | if_num = router->if_incoming->if_num; |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1088 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
| 1089 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1090 | |
| 1091 | orig_node_tmp = neigh_node->orig_node; |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1092 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 1093 | if_num = neigh_node->if_incoming->if_num; |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1094 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
| 1095 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1096 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 1097 | if (sum_orig >= sum_neigh) |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 1098 | goto out; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1099 | } |
| 1100 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1101 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1102 | goto out; |
| 1103 | |
| 1104 | unlock: |
| 1105 | rcu_read_unlock(); |
| 1106 | out: |
| 1107 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1108 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1109 | if (router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1110 | batadv_neigh_node_free_ref(router); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1111 | if (neigh_ifinfo) |
| 1112 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
| 1113 | if (router_ifinfo) |
| 1114 | batadv_neigh_ifinfo_free_ref(router_ifinfo); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1115 | } |
| 1116 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1117 | /** |
| 1118 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet |
| 1119 | * @orig_node: the orig node who originally emitted the ogm packet |
| 1120 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet |
| 1121 | * @batadv_ogm_packet: the ogm packet |
| 1122 | * @if_incoming: interface where the packet was received |
| 1123 | * @if_outgoing: interface for which the retransmission should be considered |
| 1124 | * |
| 1125 | * Returns 1 if the link can be considered bidirectional, 0 otherwise |
| 1126 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1127 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
| 1128 | struct batadv_orig_node *orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1129 | struct batadv_ogm_packet *batadv_ogm_packet, |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1130 | struct batadv_hard_iface *if_incoming, |
| 1131 | struct batadv_hard_iface *if_outgoing) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1132 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1133 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 1134 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1135 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1136 | uint8_t total_count; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1137 | uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; |
| 1138 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1139 | int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1140 | unsigned int combined_tq; |
Simon Wunderlich | c039876 | 2013-11-13 19:14:48 +0100 | [diff] [blame] | 1141 | int tq_iface_penalty; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1142 | |
| 1143 | /* find corresponding one hop neighbor */ |
| 1144 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1145 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1146 | &orig_neigh_node->neigh_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1147 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
| 1148 | orig_neigh_node->orig)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1149 | continue; |
| 1150 | |
| 1151 | if (tmp_neigh_node->if_incoming != if_incoming) |
| 1152 | continue; |
| 1153 | |
| 1154 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) |
| 1155 | continue; |
| 1156 | |
| 1157 | neigh_node = tmp_neigh_node; |
| 1158 | break; |
| 1159 | } |
| 1160 | rcu_read_unlock(); |
| 1161 | |
| 1162 | if (!neigh_node) |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1163 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
| 1164 | orig_neigh_node->orig, |
| 1165 | orig_neigh_node, |
Antonio Quartulli | 863dd7a | 2013-03-25 13:49:46 +0100 | [diff] [blame] | 1166 | orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1167 | |
| 1168 | if (!neigh_node) |
| 1169 | goto out; |
| 1170 | |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 1171 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1172 | if (orig_node == orig_neigh_node) |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 1173 | neigh_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1174 | |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 1175 | orig_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1176 | |
| 1177 | /* find packet count of corresponding one hop neighbor */ |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1178 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
| 1179 | if_num = if_incoming->if_num; |
| 1180 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1181 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
| 1182 | if (neigh_ifinfo) { |
| 1183 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; |
| 1184 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
| 1185 | } else { |
| 1186 | neigh_rq_count = 0; |
| 1187 | } |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1188 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1189 | |
| 1190 | /* pay attention to not get a value bigger than 100 % */ |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1191 | if (orig_eq_count > neigh_rq_count) |
| 1192 | total_count = neigh_rq_count; |
| 1193 | else |
| 1194 | total_count = orig_eq_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1195 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1196 | /* if we have too few packets (too less data) we set tq_own to zero |
| 1197 | * if we receive too few packets it is not considered bidirectional |
| 1198 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1199 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
| 1200 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1201 | tq_own = 0; |
| 1202 | else |
| 1203 | /* neigh_node->real_packet_count is never zero as we |
| 1204 | * only purge old information when getting new |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1205 | * information |
| 1206 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1207 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1208 | |
Sven Eckelmann | 21a1236 | 2012-03-07 09:07:46 +0100 | [diff] [blame] | 1209 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1210 | * affect the nearly-symmetric links only a little, but |
| 1211 | * punishes asymmetric links more. This will give a value |
| 1212 | * between 0 and TQ_MAX_VALUE |
| 1213 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1214 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
| 1215 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; |
| 1216 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * |
| 1217 | BATADV_TQ_LOCAL_WINDOW_SIZE * |
| 1218 | BATADV_TQ_LOCAL_WINDOW_SIZE; |
| 1219 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; |
| 1220 | inv_asym_penalty /= neigh_rq_max_cube; |
| 1221 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1222 | |
Simon Wunderlich | c039876 | 2013-11-13 19:14:48 +0100 | [diff] [blame] | 1223 | /* penalize if the OGM is forwarded on the same interface. WiFi |
| 1224 | * interfaces and other half duplex devices suffer from throughput |
| 1225 | * drops as they can't send and receive at the same time. |
| 1226 | */ |
| 1227 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; |
| 1228 | if (if_outgoing && (if_incoming == if_outgoing) && |
| 1229 | batadv_is_wifi_netdev(if_outgoing->net_dev)) |
| 1230 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, |
| 1231 | bat_priv); |
| 1232 | |
| 1233 | combined_tq = batadv_ogm_packet->tq * |
| 1234 | tq_own * |
| 1235 | tq_asym_penalty * |
| 1236 | tq_iface_penalty; |
| 1237 | combined_tq /= BATADV_TQ_MAX_VALUE * |
| 1238 | BATADV_TQ_MAX_VALUE * |
| 1239 | BATADV_TQ_MAX_VALUE; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1240 | batadv_ogm_packet->tq = combined_tq; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1241 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1242 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Simon Wunderlich | c039876 | 2013-11-13 19:14:48 +0100 | [diff] [blame] | 1243 | "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, iface_penalty: %3i, total tq: %3i, if_incoming = %s, if_outgoing = %s\n", |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1244 | orig_node->orig, orig_neigh_node->orig, total_count, |
Simon Wunderlich | c039876 | 2013-11-13 19:14:48 +0100 | [diff] [blame] | 1245 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
| 1246 | batadv_ogm_packet->tq, if_incoming->net_dev->name, |
| 1247 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1248 | |
| 1249 | /* if link has the minimum required transmission quality |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1250 | * consider it bidirectional |
| 1251 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1252 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1253 | ret = 1; |
| 1254 | |
| 1255 | out: |
| 1256 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1257 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1258 | return ret; |
| 1259 | } |
| 1260 | |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1261 | /** |
| 1262 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, |
| 1263 | * adjust the sequence number and find out whether it is a duplicate |
| 1264 | * @ethhdr: ethernet header of the packet |
| 1265 | * @batadv_ogm_packet: OGM packet to be considered |
| 1266 | * @if_incoming: interface on which the OGM packet was received |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1267 | * @if_outgoing: interface for which the retransmission should be considered |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1268 | * |
| 1269 | * Returns duplicate status as enum batadv_dup_status |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1270 | */ |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1271 | static enum batadv_dup_status |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1272 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1273 | const struct batadv_ogm_packet *batadv_ogm_packet, |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1274 | const struct batadv_hard_iface *if_incoming, |
| 1275 | struct batadv_hard_iface *if_outgoing) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1276 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1277 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 1278 | struct batadv_orig_node *orig_node; |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1279 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1280 | struct batadv_neigh_node *neigh_node; |
| 1281 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1282 | int is_dup; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1283 | int32_t seq_diff; |
| 1284 | int need_update = 0; |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1285 | int set_mark; |
| 1286 | enum batadv_dup_status ret = BATADV_NO_DUP; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1287 | uint32_t seqno = ntohl(batadv_ogm_packet->seqno); |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1288 | uint8_t *neigh_addr; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 1289 | uint8_t packet_count; |
Antonio Quartulli | 0538f75 | 2013-09-02 12:15:01 +0200 | [diff] [blame] | 1290 | unsigned long *bitmap; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1291 | |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1292 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1293 | if (!orig_node) |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1294 | return BATADV_NO_DUP; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1295 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1296 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
| 1297 | if (WARN_ON(!orig_ifinfo)) { |
| 1298 | batadv_orig_node_free_ref(orig_node); |
| 1299 | return 0; |
| 1300 | } |
| 1301 | |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1302 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1303 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1304 | |
| 1305 | /* signalize caller that the packet is to be dropped. */ |
Antonio Quartulli | 1e5cc26 | 2012-02-26 15:39:42 +0100 | [diff] [blame] | 1306 | if (!hlist_empty(&orig_node->neigh_list) && |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 1307 | batadv_window_protected(bat_priv, seq_diff, |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1308 | &orig_ifinfo->batman_seqno_reset)) { |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1309 | ret = BATADV_PROTECTED; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1310 | goto out; |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1311 | } |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1312 | |
| 1313 | rcu_read_lock(); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1314 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
| 1315 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, |
| 1316 | if_outgoing); |
| 1317 | if (!neigh_ifinfo) |
| 1318 | continue; |
| 1319 | |
| 1320 | neigh_addr = neigh_node->addr; |
| 1321 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1322 | orig_ifinfo->last_real_seqno, |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1323 | seqno); |
| 1324 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1325 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1326 | neigh_node->if_incoming == if_incoming) { |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1327 | set_mark = 1; |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1328 | if (is_dup) |
| 1329 | ret = BATADV_NEIGH_DUP; |
| 1330 | } else { |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1331 | set_mark = 0; |
Simon Wunderlich | 7c24bbb | 2013-05-23 13:07:42 +0200 | [diff] [blame] | 1332 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
| 1333 | ret = BATADV_ORIG_DUP; |
| 1334 | } |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1335 | |
| 1336 | /* if the window moved, set the update flag. */ |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1337 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
Antonio Quartulli | 0538f75 | 2013-09-02 12:15:01 +0200 | [diff] [blame] | 1338 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
Sven Eckelmann | 0f5f932 | 2012-05-12 02:09:25 +0200 | [diff] [blame] | 1339 | seq_diff, set_mark); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1340 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1341 | packet_count = bitmap_weight(bitmap, |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 1342 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1343 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
| 1344 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1345 | } |
| 1346 | rcu_read_unlock(); |
| 1347 | |
| 1348 | if (need_update) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1349 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1350 | "%s updating last_seqno: old %u, new %u\n", |
| 1351 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", |
| 1352 | orig_ifinfo->last_real_seqno, seqno); |
| 1353 | orig_ifinfo->last_real_seqno = seqno; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1354 | } |
| 1355 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1356 | out: |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1357 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1358 | batadv_orig_node_free_ref(orig_node); |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1359 | if (orig_ifinfo) |
| 1360 | batadv_orig_ifinfo_free_ref(orig_ifinfo); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1361 | return ret; |
| 1362 | } |
| 1363 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1364 | |
| 1365 | /** |
| 1366 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if |
| 1367 | * @skb: the skb containing the OGM |
| 1368 | * @orig_node: the (cached) orig node for the originator of this OGM |
| 1369 | * @if_incoming: the interface where this packet was received |
| 1370 | * @if_outgoing: the interface for which the packet should be considered |
| 1371 | */ |
| 1372 | static void |
| 1373 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, |
| 1374 | struct batadv_orig_node *orig_node, |
| 1375 | struct batadv_hard_iface *if_incoming, |
| 1376 | struct batadv_hard_iface *if_outgoing) |
| 1377 | { |
| 1378 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 1379 | struct batadv_neigh_node *router = NULL, *router_router = NULL; |
| 1380 | struct batadv_orig_node *orig_neigh_node; |
| 1381 | struct batadv_orig_ifinfo *orig_ifinfo; |
| 1382 | struct batadv_neigh_node *orig_neigh_router = NULL; |
| 1383 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
| 1384 | struct batadv_ogm_packet *ogm_packet; |
| 1385 | enum batadv_dup_status dup_status; |
| 1386 | bool is_from_best_next_hop = false; |
| 1387 | bool is_single_hop_neigh = false; |
| 1388 | bool sameseq, similar_ttl; |
| 1389 | struct sk_buff *skb_priv; |
| 1390 | struct ethhdr *ethhdr; |
| 1391 | uint8_t *prev_sender; |
| 1392 | int is_bidirect; |
| 1393 | |
| 1394 | /* create a private copy of the skb, as some functions change tq value |
| 1395 | * and/or flags. |
| 1396 | */ |
| 1397 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
| 1398 | if (!skb_priv) |
| 1399 | return; |
| 1400 | |
| 1401 | ethhdr = eth_hdr(skb_priv); |
| 1402 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); |
| 1403 | |
| 1404 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
| 1405 | if_incoming, if_outgoing); |
| 1406 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) |
| 1407 | is_single_hop_neigh = true; |
| 1408 | |
| 1409 | if (dup_status == BATADV_PROTECTED) { |
| 1410 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1411 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
| 1412 | ethhdr->h_source); |
| 1413 | goto out; |
| 1414 | } |
| 1415 | |
| 1416 | if (ogm_packet->tq == 0) { |
| 1417 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1418 | "Drop packet: originator packet with tq equal 0\n"); |
| 1419 | goto out; |
| 1420 | } |
| 1421 | |
| 1422 | router = batadv_orig_router_get(orig_node, if_outgoing); |
| 1423 | if (router) { |
| 1424 | router_router = batadv_orig_router_get(router->orig_node, |
| 1425 | if_outgoing); |
| 1426 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); |
| 1427 | } |
| 1428 | |
| 1429 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
| 1430 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
| 1431 | is_from_best_next_hop = true; |
| 1432 | |
| 1433 | prev_sender = ogm_packet->prev_sender; |
| 1434 | /* avoid temporary routing loops */ |
| 1435 | if (router && router_router && |
| 1436 | (batadv_compare_eth(router->addr, prev_sender)) && |
| 1437 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
| 1438 | (batadv_compare_eth(router->addr, router_router->addr))) { |
| 1439 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1440 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
| 1441 | ethhdr->h_source); |
| 1442 | goto out; |
| 1443 | } |
| 1444 | |
| 1445 | if (if_outgoing == BATADV_IF_DEFAULT) |
| 1446 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); |
| 1447 | |
| 1448 | /* if sender is a direct neighbor the sender mac equals |
| 1449 | * originator mac |
| 1450 | */ |
| 1451 | if (is_single_hop_neigh) |
| 1452 | orig_neigh_node = orig_node; |
| 1453 | else |
| 1454 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
| 1455 | ethhdr->h_source); |
| 1456 | |
| 1457 | if (!orig_neigh_node) |
| 1458 | goto out; |
| 1459 | |
| 1460 | /* Update nc_nodes of the originator */ |
| 1461 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, |
| 1462 | ogm_packet, is_single_hop_neigh); |
| 1463 | |
| 1464 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
| 1465 | if_outgoing); |
| 1466 | |
| 1467 | /* drop packet if sender is not a direct neighbor and if we |
| 1468 | * don't route towards it |
| 1469 | */ |
| 1470 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
| 1471 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1472 | "Drop packet: OGM via unknown neighbor!\n"); |
| 1473 | goto out_neigh; |
| 1474 | } |
| 1475 | |
| 1476 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
| 1477 | ogm_packet, if_incoming, |
| 1478 | if_outgoing); |
| 1479 | |
| 1480 | /* update ranking if it is not a duplicate or has the same |
| 1481 | * seqno and similar ttl as the non-duplicate |
| 1482 | */ |
| 1483 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
| 1484 | if (!orig_ifinfo) |
| 1485 | goto out_neigh; |
| 1486 | |
| 1487 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); |
| 1488 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; |
| 1489 | |
| 1490 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
| 1491 | (sameseq && similar_ttl))) { |
| 1492 | batadv_iv_ogm_orig_update(bat_priv, orig_node, |
| 1493 | orig_ifinfo, ethhdr, |
| 1494 | ogm_packet, if_incoming, |
| 1495 | if_outgoing, dup_status); |
| 1496 | } |
| 1497 | batadv_orig_ifinfo_free_ref(orig_ifinfo); |
| 1498 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 1499 | /* only forward for specific interface, not for the default one. */ |
| 1500 | if (if_outgoing == BATADV_IF_DEFAULT) |
| 1501 | goto out_neigh; |
| 1502 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1503 | /* is single hop (direct) neighbor */ |
| 1504 | if (is_single_hop_neigh) { |
| 1505 | /* OGMs from secondary interfaces should only scheduled once |
| 1506 | * per interface where it has been received, not multiple times |
| 1507 | */ |
| 1508 | if ((ogm_packet->ttl <= 2) && |
| 1509 | (if_incoming != if_outgoing)) { |
| 1510 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1511 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); |
| 1512 | goto out_neigh; |
| 1513 | } |
| 1514 | /* mark direct link on incoming interface */ |
| 1515 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
| 1516 | is_single_hop_neigh, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 1517 | is_from_best_next_hop, if_incoming, |
| 1518 | if_outgoing); |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1519 | |
| 1520 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1521 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
| 1522 | goto out_neigh; |
| 1523 | } |
| 1524 | |
| 1525 | /* multihop originator */ |
| 1526 | if (!is_bidirect) { |
| 1527 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1528 | "Drop packet: not received via bidirectional link\n"); |
| 1529 | goto out_neigh; |
| 1530 | } |
| 1531 | |
| 1532 | if (dup_status == BATADV_NEIGH_DUP) { |
| 1533 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1534 | "Drop packet: duplicate packet received\n"); |
| 1535 | goto out_neigh; |
| 1536 | } |
| 1537 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1538 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 1539 | "Forwarding packet: rebroadcast originator packet\n"); |
| 1540 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
| 1541 | is_single_hop_neigh, is_from_best_next_hop, |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 1542 | if_incoming, if_outgoing); |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1543 | |
| 1544 | out_neigh: |
| 1545 | if ((orig_neigh_node) && (!is_single_hop_neigh)) |
| 1546 | batadv_orig_node_free_ref(orig_neigh_node); |
| 1547 | out: |
| 1548 | if (router) |
| 1549 | batadv_neigh_node_free_ref(router); |
| 1550 | if (router_router) |
| 1551 | batadv_neigh_node_free_ref(router_router); |
| 1552 | if (orig_neigh_router) |
| 1553 | batadv_neigh_node_free_ref(orig_neigh_router); |
| 1554 | |
| 1555 | kfree_skb(skb_priv); |
| 1556 | } |
| 1557 | |
| 1558 | /** |
| 1559 | * batadv_iv_ogm_process - process an incoming batman iv OGM |
| 1560 | * @skb: the skb containing the OGM |
| 1561 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) |
| 1562 | * @if_incoming: the interface where this packet was receved |
| 1563 | */ |
| 1564 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1565 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1566 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1567 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1568 | struct batadv_orig_node *orig_neigh_node, *orig_node; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1569 | struct batadv_hard_iface *hard_iface; |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1570 | struct batadv_ogm_packet *ogm_packet; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1571 | uint32_t if_incoming_seqno; |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1572 | bool has_directlink_flag; |
| 1573 | struct ethhdr *ethhdr; |
| 1574 | bool is_my_oldorig = false; |
| 1575 | bool is_my_addr = false; |
| 1576 | bool is_my_orig = false; |
| 1577 | |
| 1578 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); |
| 1579 | ethhdr = eth_hdr(skb); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1580 | |
| 1581 | /* Silently drop when the batman packet is actually not a |
| 1582 | * correct packet. |
| 1583 | * |
| 1584 | * This might happen if a packet is padded (e.g. Ethernet has a |
| 1585 | * minimum frame length of 64 byte) and the aggregation interprets |
| 1586 | * it as an additional length. |
| 1587 | * |
| 1588 | * TODO: A more sane solution would be to have a bit in the |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1589 | * batadv_ogm_packet to detect whether the packet is the last |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1590 | * packet in an aggregation. Here we expect that the padding |
| 1591 | * is always zero (or not 0x01) |
| 1592 | */ |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1593 | if (ogm_packet->packet_type != BATADV_IV_OGM) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1594 | return; |
| 1595 | |
| 1596 | /* could be changed by schedule_own_packet() */ |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 1597 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1598 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1599 | if (ogm_packet->flags & BATADV_DIRECTLINK) |
| 1600 | has_directlink_flag = true; |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1601 | else |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1602 | has_directlink_flag = false; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1603 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1604 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 1605 | "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, tq %d, TTL %d, V %d, IDF %d)\n", |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1606 | ethhdr->h_source, if_incoming->net_dev->name, |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1607 | if_incoming->net_dev->dev_addr, ogm_packet->orig, |
| 1608 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), |
| 1609 | ogm_packet->tq, ogm_packet->ttl, |
| 1610 | ogm_packet->version, has_directlink_flag); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1611 | |
| 1612 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 1613 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 1614 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1615 | continue; |
| 1616 | |
| 1617 | if (hard_iface->soft_iface != if_incoming->soft_iface) |
| 1618 | continue; |
| 1619 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1620 | if (batadv_compare_eth(ethhdr->h_source, |
| 1621 | hard_iface->net_dev->dev_addr)) |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1622 | is_my_addr = true; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1623 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1624 | if (batadv_compare_eth(ogm_packet->orig, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1625 | hard_iface->net_dev->dev_addr)) |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1626 | is_my_orig = true; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1627 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1628 | if (batadv_compare_eth(ogm_packet->prev_sender, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1629 | hard_iface->net_dev->dev_addr)) |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1630 | is_my_oldorig = true; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1631 | } |
| 1632 | rcu_read_unlock(); |
| 1633 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1634 | if (is_my_addr) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1635 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1636 | "Drop packet: received my own broadcast (sender: %pM)\n", |
| 1637 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1638 | return; |
| 1639 | } |
| 1640 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1641 | if (is_my_orig) { |
| 1642 | unsigned long *word; |
| 1643 | int offset; |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1644 | int32_t bit_pos; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1645 | int16_t if_num; |
| 1646 | uint8_t *weight; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1647 | |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1648 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
| 1649 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1650 | if (!orig_neigh_node) |
| 1651 | return; |
| 1652 | |
| 1653 | /* neighbor has to indicate direct link and it has to |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1654 | * come via the corresponding interface |
| 1655 | * save packet seqno for bidirectional check |
| 1656 | */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1657 | if (has_directlink_flag && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1658 | batadv_compare_eth(if_incoming->net_dev->dev_addr, |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1659 | ogm_packet->orig)) { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1660 | if_num = if_incoming->if_num; |
| 1661 | offset = if_num * BATADV_NUM_WORDS; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1662 | |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1663 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); |
| 1664 | word = &(orig_neigh_node->bat_iv.bcast_own[offset]); |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1665 | bit_pos = if_incoming_seqno - 2; |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1666 | bit_pos -= ntohl(ogm_packet->seqno); |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1667 | batadv_set_bit(word, bit_pos); |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1668 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1669 | *weight = bitmap_weight(word, |
| 1670 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
Antonio Quartulli | bbad0a5 | 2013-09-02 12:15:02 +0200 | [diff] [blame] | 1671 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1672 | } |
| 1673 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1674 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1675 | "Drop packet: originator packet from myself (via neighbor)\n"); |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1676 | batadv_orig_node_free_ref(orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1677 | return; |
| 1678 | } |
| 1679 | |
| 1680 | if (is_my_oldorig) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1681 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1682 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", |
| 1683 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1684 | return; |
| 1685 | } |
| 1686 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1687 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1688 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1689 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", |
| 1690 | ethhdr->h_source); |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 1691 | return; |
| 1692 | } |
| 1693 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1694 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1695 | if (!orig_node) |
| 1696 | return; |
| 1697 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1698 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
| 1699 | if_incoming, BATADV_IF_DEFAULT); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1700 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1701 | rcu_read_lock(); |
| 1702 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
| 1703 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
| 1704 | continue; |
| 1705 | |
| 1706 | if (hard_iface->soft_iface != bat_priv->soft_iface) |
| 1707 | continue; |
| 1708 | |
| 1709 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
| 1710 | if_incoming, hard_iface); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1711 | } |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1712 | rcu_read_unlock(); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1713 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1714 | batadv_orig_node_free_ref(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1715 | } |
| 1716 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1717 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1718 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1719 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1720 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1721 | struct batadv_ogm_packet *ogm_packet; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1722 | uint8_t *packet_pos; |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1723 | int ogm_offset; |
Marek Lindner | ef26157 | 2013-04-23 21:39:57 +0800 | [diff] [blame] | 1724 | bool ret; |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1725 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 1726 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1727 | if (!ret) |
| 1728 | return NET_RX_DROP; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1729 | |
Marek Lindner | edbf12b | 2012-03-11 06:17:49 +0800 | [diff] [blame] | 1730 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
| 1731 | * that does not have B.A.T.M.A.N. IV enabled ? |
| 1732 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1733 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
Marek Lindner | edbf12b | 2012-03-11 06:17:49 +0800 | [diff] [blame] | 1734 | return NET_RX_DROP; |
| 1735 | |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 1736 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
| 1737 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 1738 | skb->len + ETH_HLEN); |
| 1739 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1740 | ogm_offset = 0; |
| 1741 | ogm_packet = (struct batadv_ogm_packet *)skb->data; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1742 | |
| 1743 | /* unpack the aggregated packets and process them one by one */ |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1744 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
| 1745 | ogm_packet->tvlv_len)) { |
| 1746 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1747 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1748 | ogm_offset += BATADV_OGM_HLEN; |
| 1749 | ogm_offset += ntohs(ogm_packet->tvlv_len); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1750 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1751 | packet_pos = skb->data + ogm_offset; |
| 1752 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b47506d | 2013-03-04 10:39:49 +0800 | [diff] [blame] | 1753 | } |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1754 | |
| 1755 | kfree_skb(skb); |
| 1756 | return NET_RX_SUCCESS; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1757 | } |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1758 | |
Simon Wunderlich | 1b371d1 | 2014-01-15 21:17:54 +0100 | [diff] [blame] | 1759 | /** |
| 1760 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1761 | * @orig_node: the orig_node for which the neighbors are printed |
| 1762 | * @if_outgoing: outgoing interface for these entries |
| 1763 | * @seq: debugfs table seq_file struct |
| 1764 | * |
| 1765 | * Must be called while holding an rcu lock. |
| 1766 | */ |
| 1767 | static void |
| 1768 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, |
| 1769 | struct batadv_hard_iface *if_outgoing, |
| 1770 | struct seq_file *seq) |
| 1771 | { |
| 1772 | struct batadv_neigh_node *neigh_node; |
| 1773 | struct batadv_neigh_ifinfo *n_ifinfo; |
| 1774 | |
| 1775 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
| 1776 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); |
| 1777 | if (!n_ifinfo) |
| 1778 | continue; |
| 1779 | |
| 1780 | seq_printf(seq, " %pM (%3i)", |
| 1781 | neigh_node->addr, |
| 1782 | n_ifinfo->bat_iv.tq_avg); |
| 1783 | |
| 1784 | batadv_neigh_ifinfo_free_ref(n_ifinfo); |
| 1785 | } |
| 1786 | } |
| 1787 | |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1788 | /** |
| 1789 | * batadv_iv_ogm_orig_print - print the originator table |
| 1790 | * @bat_priv: the bat priv with all the soft interface information |
| 1791 | * @seq: debugfs table seq_file struct |
Simon Wunderlich | cb1c92e | 2013-11-21 11:52:16 +0100 | [diff] [blame] | 1792 | * @if_outgoing: the outgoing interface for which this should be printed |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1793 | */ |
| 1794 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, |
Simon Wunderlich | cb1c92e | 2013-11-21 11:52:16 +0100 | [diff] [blame] | 1795 | struct seq_file *seq, |
| 1796 | struct batadv_hard_iface *if_outgoing) |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1797 | { |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1798 | struct batadv_neigh_node *neigh_node; |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1799 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
| 1800 | int last_seen_msecs, last_seen_secs; |
| 1801 | struct batadv_orig_node *orig_node; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1802 | struct batadv_neigh_ifinfo *n_ifinfo; |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1803 | unsigned long last_seen_jiffies; |
| 1804 | struct hlist_head *head; |
| 1805 | int batman_count = 0; |
| 1806 | uint32_t i; |
| 1807 | |
| 1808 | seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n", |
| 1809 | "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE, |
| 1810 | "Nexthop", "outgoingIF", "Potential nexthops"); |
| 1811 | |
| 1812 | for (i = 0; i < hash->size; i++) { |
| 1813 | head = &hash->table[i]; |
| 1814 | |
| 1815 | rcu_read_lock(); |
| 1816 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 1817 | neigh_node = batadv_orig_router_get(orig_node, |
Simon Wunderlich | cb1c92e | 2013-11-21 11:52:16 +0100 | [diff] [blame] | 1818 | if_outgoing); |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1819 | if (!neigh_node) |
| 1820 | continue; |
| 1821 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1822 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
Simon Wunderlich | cb1c92e | 2013-11-21 11:52:16 +0100 | [diff] [blame] | 1823 | if_outgoing); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1824 | if (!n_ifinfo) |
| 1825 | goto next; |
| 1826 | |
| 1827 | if (n_ifinfo->bat_iv.tq_avg == 0) |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1828 | goto next; |
| 1829 | |
| 1830 | last_seen_jiffies = jiffies - orig_node->last_seen; |
| 1831 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); |
| 1832 | last_seen_secs = last_seen_msecs / 1000; |
| 1833 | last_seen_msecs = last_seen_msecs % 1000; |
| 1834 | |
| 1835 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", |
| 1836 | orig_node->orig, last_seen_secs, |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1837 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1838 | neigh_node->addr, |
| 1839 | neigh_node->if_incoming->net_dev->name); |
| 1840 | |
Simon Wunderlich | cb1c92e | 2013-11-21 11:52:16 +0100 | [diff] [blame] | 1841 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
| 1842 | seq); |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1843 | seq_puts(seq, "\n"); |
| 1844 | batman_count++; |
| 1845 | |
| 1846 | next: |
| 1847 | batadv_neigh_node_free_ref(neigh_node); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1848 | if (n_ifinfo) |
| 1849 | batadv_neigh_ifinfo_free_ref(n_ifinfo); |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1850 | } |
| 1851 | rcu_read_unlock(); |
| 1852 | } |
| 1853 | |
| 1854 | if (batman_count == 0) |
| 1855 | seq_puts(seq, "No batman nodes in range ...\n"); |
| 1856 | } |
| 1857 | |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1858 | /** |
| 1859 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors |
| 1860 | * @neigh1: the first neighbor object of the comparison |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1861 | * @if_outgoing1: outgoing interface for the first neighbor |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1862 | * @neigh2: the second neighbor object of the comparison |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1863 | * @if_outgoing2: outgoing interface for the second neighbor |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1864 | * |
| 1865 | * Returns a value less, equal to or greater than 0 if the metric via neigh1 is |
| 1866 | * lower, the same as or higher than the metric via neigh2 |
| 1867 | */ |
| 1868 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1869 | struct batadv_hard_iface *if_outgoing1, |
| 1870 | struct batadv_neigh_node *neigh2, |
| 1871 | struct batadv_hard_iface *if_outgoing2) |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1872 | { |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1873 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1874 | uint8_t tq1, tq2; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1875 | int diff; |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1876 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1877 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
| 1878 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1879 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1880 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
| 1881 | diff = 0; |
| 1882 | goto out; |
| 1883 | } |
| 1884 | |
| 1885 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
| 1886 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; |
| 1887 | diff = tq1 - tq2; |
| 1888 | |
| 1889 | out: |
| 1890 | if (neigh1_ifinfo) |
| 1891 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); |
| 1892 | if (neigh2_ifinfo) |
| 1893 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); |
| 1894 | |
| 1895 | return diff; |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1896 | } |
| 1897 | |
Antonio Quartulli | c43c981 | 2013-09-02 12:15:05 +0200 | [diff] [blame] | 1898 | /** |
| 1899 | * batadv_iv_ogm_neigh_is_eob - check if neigh1 is equally good or better than |
| 1900 | * neigh2 from the metric prospective |
| 1901 | * @neigh1: the first neighbor object of the comparison |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1902 | * @if_outgoing: outgoing interface for the first neighbor |
Antonio Quartulli | c43c981 | 2013-09-02 12:15:05 +0200 | [diff] [blame] | 1903 | * @neigh2: the second neighbor object of the comparison |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1904 | * @if_outgoing2: outgoing interface for the second neighbor |
Antonio Quartulli | c43c981 | 2013-09-02 12:15:05 +0200 | [diff] [blame] | 1905 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 1906 | * Returns true if the metric via neigh1 is equally good or better than |
| 1907 | * the metric via neigh2, false otherwise. |
| 1908 | */ |
| 1909 | static bool |
| 1910 | batadv_iv_ogm_neigh_is_eob(struct batadv_neigh_node *neigh1, |
| 1911 | struct batadv_hard_iface *if_outgoing1, |
| 1912 | struct batadv_neigh_node *neigh2, |
| 1913 | struct batadv_hard_iface *if_outgoing2) |
| 1914 | { |
| 1915 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
| 1916 | uint8_t tq1, tq2; |
| 1917 | bool ret; |
| 1918 | |
| 1919 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
| 1920 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); |
| 1921 | |
| 1922 | /* we can't say that the metric is better */ |
| 1923 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
| 1924 | ret = false; |
| 1925 | goto out; |
| 1926 | } |
| 1927 | |
| 1928 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
| 1929 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; |
| 1930 | ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; |
| 1931 | |
| 1932 | out: |
| 1933 | if (neigh1_ifinfo) |
| 1934 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); |
| 1935 | if (neigh2_ifinfo) |
| 1936 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); |
| 1937 | |
| 1938 | return ret; |
Antonio Quartulli | c43c981 | 2013-09-02 12:15:05 +0200 | [diff] [blame] | 1939 | } |
| 1940 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1941 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
Marek Lindner | 519d349 | 2012-04-18 17:15:57 +0800 | [diff] [blame] | 1942 | .name = "BATMAN_IV", |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1943 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
| 1944 | .bat_iface_disable = batadv_iv_ogm_iface_disable, |
| 1945 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, |
| 1946 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, |
| 1947 | .bat_ogm_schedule = batadv_iv_ogm_schedule, |
| 1948 | .bat_ogm_emit = batadv_iv_ogm_emit, |
Antonio Quartulli | a3285a8 | 2013-09-02 12:15:04 +0200 | [diff] [blame] | 1949 | .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, |
Antonio Quartulli | c43c981 | 2013-09-02 12:15:05 +0200 | [diff] [blame] | 1950 | .bat_neigh_is_equiv_or_better = batadv_iv_ogm_neigh_is_eob, |
Antonio Quartulli | 737a2a22 | 2013-09-02 12:15:03 +0200 | [diff] [blame] | 1951 | .bat_orig_print = batadv_iv_ogm_orig_print, |
Antonio Quartulli | d0015fd | 2013-09-03 11:10:23 +0200 | [diff] [blame] | 1952 | .bat_orig_free = batadv_iv_ogm_orig_free, |
| 1953 | .bat_orig_add_if = batadv_iv_ogm_orig_add_if, |
| 1954 | .bat_orig_del_if = batadv_iv_ogm_orig_del_if, |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1955 | }; |
| 1956 | |
Sven Eckelmann | 81c524f | 2012-05-12 02:09:22 +0200 | [diff] [blame] | 1957 | int __init batadv_iv_init(void) |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1958 | { |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1959 | int ret; |
| 1960 | |
| 1961 | /* batman originator packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1962 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
| 1963 | batadv_iv_ogm_receive); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1964 | if (ret < 0) |
| 1965 | goto out; |
| 1966 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1967 | ret = batadv_algo_register(&batadv_batman_iv); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1968 | if (ret < 0) |
| 1969 | goto handler_unregister; |
| 1970 | |
| 1971 | goto out; |
| 1972 | |
| 1973 | handler_unregister: |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1974 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1975 | out: |
| 1976 | return ret; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1977 | } |