Sven Eckelmann | 0046b04 | 2016-01-01 00:01:03 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2009-2016 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 2 | * |
| 3 | * Marek Lindner |
| 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/>. |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 16 | */ |
| 17 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 18 | #include "gateway_client.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 19 | #include "main.h" |
| 20 | |
| 21 | #include <linux/atomic.h> |
| 22 | #include <linux/byteorder/generic.h> |
Sven Eckelmann | d7129da | 2016-07-03 13:31:42 +0200 | [diff] [blame] | 23 | #include <linux/errno.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 24 | #include <linux/etherdevice.h> |
| 25 | #include <linux/fs.h> |
| 26 | #include <linux/if_ether.h> |
| 27 | #include <linux/if_vlan.h> |
| 28 | #include <linux/in.h> |
| 29 | #include <linux/ip.h> |
| 30 | #include <linux/ipv6.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 31 | #include <linux/kernel.h> |
Sven Eckelmann | e7aed32 | 2016-01-16 10:29:41 +0100 | [diff] [blame] | 32 | #include <linux/kref.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 33 | #include <linux/list.h> |
Sven Eckelmann | 3c3e542 | 2020-03-16 23:31:01 +0100 | [diff] [blame] | 34 | #include <linux/lockdep.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 35 | #include <linux/netdevice.h> |
Sven Eckelmann | d7129da | 2016-07-03 13:31:42 +0200 | [diff] [blame] | 36 | #include <linux/netlink.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 37 | #include <linux/rculist.h> |
| 38 | #include <linux/rcupdate.h> |
| 39 | #include <linux/seq_file.h> |
| 40 | #include <linux/skbuff.h> |
| 41 | #include <linux/slab.h> |
| 42 | #include <linux/spinlock.h> |
| 43 | #include <linux/stddef.h> |
| 44 | #include <linux/udp.h> |
Sven Eckelmann | d7129da | 2016-07-03 13:31:42 +0200 | [diff] [blame] | 45 | #include <net/sock.h> |
| 46 | #include <uapi/linux/batman_adv.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 47 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 48 | #include "gateway_common.h" |
| 49 | #include "hard-interface.h" |
Sven Eckelmann | ba41208 | 2016-05-15 23:48:31 +0200 | [diff] [blame] | 50 | #include "log.h" |
Sven Eckelmann | d7129da | 2016-07-03 13:31:42 +0200 | [diff] [blame] | 51 | #include "netlink.h" |
Linus Lüssing | 57f0c07 | 2011-03-14 22:43:33 +0000 | [diff] [blame] | 52 | #include "originator.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 53 | #include "packet.h" |
Antonio Quartulli | 43676ab5 | 2011-04-26 21:31:45 +0200 | [diff] [blame] | 54 | #include "routing.h" |
Sven Eckelmann | d7129da | 2016-07-03 13:31:42 +0200 | [diff] [blame] | 55 | #include "soft-interface.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 56 | #include "sysfs.h" |
| 57 | #include "translation-table.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 58 | |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 59 | /* These are the offsets of the "hw type" and "hw address length" in the dhcp |
| 60 | * packet starting at the beginning of the dhcp header |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 61 | */ |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 62 | #define BATADV_DHCP_HTYPE_OFFSET 1 |
| 63 | #define BATADV_DHCP_HLEN_OFFSET 2 |
| 64 | /* Value of htype representing Ethernet */ |
| 65 | #define BATADV_DHCP_HTYPE_ETHERNET 0x01 |
| 66 | /* This is the offset of the "chaddr" field in the dhcp packet starting at the |
| 67 | * beginning of the dhcp header |
| 68 | */ |
| 69 | #define BATADV_DHCP_CHADDR_OFFSET 28 |
Antonio Quartulli | 43676ab5 | 2011-04-26 21:31:45 +0200 | [diff] [blame] | 70 | |
Sven Eckelmann | e7aed32 | 2016-01-16 10:29:41 +0100 | [diff] [blame] | 71 | /** |
| 72 | * batadv_gw_node_release - release gw_node from lists and queue for free after |
| 73 | * rcu grace period |
| 74 | * @ref: kref pointer of the gw_node |
| 75 | */ |
| 76 | static void batadv_gw_node_release(struct kref *ref) |
| 77 | { |
| 78 | struct batadv_gw_node *gw_node; |
| 79 | |
| 80 | gw_node = container_of(ref, struct batadv_gw_node, refcount); |
| 81 | |
Sven Eckelmann | 5d96731 | 2016-01-17 11:01:09 +0100 | [diff] [blame] | 82 | batadv_orig_node_put(gw_node->orig_node); |
Sven Eckelmann | e7aed32 | 2016-01-16 10:29:41 +0100 | [diff] [blame] | 83 | kfree_rcu(gw_node, rcu); |
| 84 | } |
| 85 | |
| 86 | /** |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 87 | * batadv_gw_node_put - decrement the gw_node refcounter and possibly release it |
Sven Eckelmann | e7aed32 | 2016-01-16 10:29:41 +0100 | [diff] [blame] | 88 | * @gw_node: gateway node to free |
| 89 | */ |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 90 | void batadv_gw_node_put(struct batadv_gw_node *gw_node) |
Marek Lindner | 25b6d3c | 2011-02-10 14:33:49 +0000 | [diff] [blame] | 91 | { |
Sven Eckelmann | e7aed32 | 2016-01-16 10:29:41 +0100 | [diff] [blame] | 92 | kref_put(&gw_node->refcount, batadv_gw_node_release); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 93 | } |
| 94 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 95 | struct batadv_gw_node * |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 96 | batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 97 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 98 | struct batadv_gw_node *gw_node; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 99 | |
Linus Lüssing | 5d02b3c | 2011-02-13 21:13:02 +0000 | [diff] [blame] | 100 | rcu_read_lock(); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 101 | gw_node = rcu_dereference(bat_priv->gw.curr_gw); |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 102 | if (!gw_node) |
Linus Lüssing | 5d02b3c | 2011-02-13 21:13:02 +0000 | [diff] [blame] | 103 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 104 | |
Sven Eckelmann | e7aed32 | 2016-01-16 10:29:41 +0100 | [diff] [blame] | 105 | if (!kref_get_unless_zero(&gw_node->refcount)) |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 106 | gw_node = NULL; |
| 107 | |
| 108 | out: |
| 109 | rcu_read_unlock(); |
| 110 | return gw_node; |
| 111 | } |
| 112 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 113 | struct batadv_orig_node * |
| 114 | batadv_gw_get_selected_orig(struct batadv_priv *bat_priv) |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 115 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 116 | struct batadv_gw_node *gw_node; |
| 117 | struct batadv_orig_node *orig_node = NULL; |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 118 | |
Sven Eckelmann | 1409a83 | 2012-05-12 18:33:55 +0200 | [diff] [blame] | 119 | gw_node = batadv_gw_get_selected_gw_node(bat_priv); |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 120 | if (!gw_node) |
Marek Lindner | 7b36e8e | 2011-02-18 12:28:10 +0000 | [diff] [blame] | 121 | goto out; |
Linus Lüssing | 5d02b3c | 2011-02-13 21:13:02 +0000 | [diff] [blame] | 122 | |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 123 | rcu_read_lock(); |
| 124 | orig_node = gw_node->orig_node; |
| 125 | if (!orig_node) |
| 126 | goto unlock; |
| 127 | |
Sven Eckelmann | 7c12439 | 2016-01-16 10:29:56 +0100 | [diff] [blame] | 128 | if (!kref_get_unless_zero(&orig_node->refcount)) |
Marek Lindner | 7b36e8e | 2011-02-18 12:28:10 +0000 | [diff] [blame] | 129 | orig_node = NULL; |
Linus Lüssing | 43c70ad | 2011-02-13 21:13:04 +0000 | [diff] [blame] | 130 | |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 131 | unlock: |
Linus Lüssing | 5d02b3c | 2011-02-13 21:13:02 +0000 | [diff] [blame] | 132 | rcu_read_unlock(); |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 133 | out: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 134 | if (gw_node) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 135 | batadv_gw_node_put(gw_node); |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 136 | return orig_node; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 137 | } |
| 138 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 139 | static void batadv_gw_select(struct batadv_priv *bat_priv, |
| 140 | struct batadv_gw_node *new_gw_node) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 141 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 142 | struct batadv_gw_node *curr_gw_node; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 143 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 144 | spin_lock_bh(&bat_priv->gw.list_lock); |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 145 | |
Sven Eckelmann | a08d497 | 2016-03-05 16:09:22 +0100 | [diff] [blame] | 146 | if (new_gw_node) |
| 147 | kref_get(&new_gw_node->refcount); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 148 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 149 | curr_gw_node = rcu_dereference_protected(bat_priv->gw.curr_gw, 1); |
| 150 | rcu_assign_pointer(bat_priv->gw.curr_gw, new_gw_node); |
Marek Lindner | 25b6d3c | 2011-02-10 14:33:49 +0000 | [diff] [blame] | 151 | |
| 152 | if (curr_gw_node) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 153 | batadv_gw_node_put(curr_gw_node); |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 154 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 155 | spin_unlock_bh(&bat_priv->gw.list_lock); |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 156 | } |
| 157 | |
Antonio Quartulli | 4e820e7 | 2013-11-04 20:59:41 +0100 | [diff] [blame] | 158 | /** |
| 159 | * batadv_gw_reselect - force a gateway reselection |
| 160 | * @bat_priv: the bat priv with all the soft interface information |
| 161 | * |
| 162 | * Set a flag to remind the GW component to perform a new gateway reselection. |
| 163 | * However this function does not ensure that the current gateway is going to be |
| 164 | * deselected. The reselection mechanism may elect the same gateway once again. |
| 165 | * |
| 166 | * This means that invoking batadv_gw_reselect() does not guarantee a gateway |
| 167 | * change and therefore a uevent is not necessarily expected. |
| 168 | */ |
| 169 | void batadv_gw_reselect(struct batadv_priv *bat_priv) |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 170 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 171 | atomic_set(&bat_priv->gw.reselect, 1); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 172 | } |
| 173 | |
Antonio Quartulli | c6eaa3f | 2013-07-13 00:06:00 +0200 | [diff] [blame] | 174 | /** |
| 175 | * batadv_gw_check_client_stop - check if client mode has been switched off |
| 176 | * @bat_priv: the bat priv with all the soft interface information |
| 177 | * |
| 178 | * This function assumes the caller has checked that the gw state *is actually |
| 179 | * changing*. This function is not supposed to be called when there is no state |
| 180 | * change. |
| 181 | */ |
| 182 | void batadv_gw_check_client_stop(struct batadv_priv *bat_priv) |
| 183 | { |
| 184 | struct batadv_gw_node *curr_gw; |
| 185 | |
Antonio Quartulli | 3a24a63 | 2016-05-06 02:46:38 +0800 | [diff] [blame] | 186 | if (atomic_read(&bat_priv->gw.mode) != BATADV_GW_MODE_CLIENT) |
Antonio Quartulli | c6eaa3f | 2013-07-13 00:06:00 +0200 | [diff] [blame] | 187 | return; |
| 188 | |
| 189 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
| 190 | if (!curr_gw) |
| 191 | return; |
| 192 | |
Antonio Quartulli | f316318 | 2013-11-04 20:59:40 +0100 | [diff] [blame] | 193 | /* deselect the current gateway so that next time that client mode is |
| 194 | * enabled a proper GW_ADD event can be sent |
| 195 | */ |
| 196 | batadv_gw_select(bat_priv, NULL); |
| 197 | |
Antonio Quartulli | c6eaa3f | 2013-07-13 00:06:00 +0200 | [diff] [blame] | 198 | /* if batman-adv is switching the gw client mode off and a gateway was |
| 199 | * already selected, send a DEL uevent |
| 200 | */ |
| 201 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_DEL, NULL); |
| 202 | |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 203 | batadv_gw_node_put(curr_gw); |
Antonio Quartulli | c6eaa3f | 2013-07-13 00:06:00 +0200 | [diff] [blame] | 204 | } |
| 205 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 206 | void batadv_gw_election(struct batadv_priv *bat_priv) |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 207 | { |
Sven Eckelmann | 4f248cf | 2015-06-09 20:50:49 +0200 | [diff] [blame] | 208 | struct batadv_gw_node *curr_gw = NULL; |
| 209 | struct batadv_gw_node *next_gw = NULL; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 210 | struct batadv_neigh_node *router = NULL; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 211 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
Antonio Quartulli | 19595e0 | 2011-06-12 11:58:58 +0200 | [diff] [blame] | 212 | char gw_addr[18] = { '\0' }; |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 213 | |
Antonio Quartulli | 3a24a63 | 2016-05-06 02:46:38 +0800 | [diff] [blame] | 214 | if (atomic_read(&bat_priv->gw.mode) != BATADV_GW_MODE_CLIENT) |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 215 | goto out; |
| 216 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 217 | if (!bat_priv->algo_ops->gw.get_best_gw_node) |
| 218 | goto out; |
| 219 | |
Sven Eckelmann | 1409a83 | 2012-05-12 18:33:55 +0200 | [diff] [blame] | 220 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 221 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 222 | if (!batadv_atomic_dec_not_zero(&bat_priv->gw.reselect) && curr_gw) |
Marek Lindner | caa0bf6 | 2012-08-04 04:13:26 +0000 | [diff] [blame] | 223 | goto out; |
| 224 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 225 | /* if gw.reselect is set to 1 it means that a previous call to |
| 226 | * gw.is_eligible() said that we have a new best GW, therefore it can |
| 227 | * now be picked from the list and selected |
| 228 | */ |
| 229 | next_gw = bat_priv->algo_ops->gw.get_best_gw_node(bat_priv); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 230 | |
| 231 | if (curr_gw == next_gw) |
| 232 | goto out; |
| 233 | |
| 234 | if (next_gw) { |
Antonio Quartulli | 19595e0 | 2011-06-12 11:58:58 +0200 | [diff] [blame] | 235 | sprintf(gw_addr, "%pM", next_gw->orig_node->orig); |
| 236 | |
Simon Wunderlich | 7351a482 | 2013-11-13 19:14:47 +0100 | [diff] [blame] | 237 | router = batadv_orig_router_get(next_gw->orig_node, |
| 238 | BATADV_IF_DEFAULT); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 239 | if (!router) { |
Antonio Quartulli | 4e820e7 | 2013-11-04 20:59:41 +0100 | [diff] [blame] | 240 | batadv_gw_reselect(bat_priv); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 241 | goto out; |
| 242 | } |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 243 | |
| 244 | router_ifinfo = batadv_neigh_ifinfo_get(router, |
| 245 | BATADV_IF_DEFAULT); |
| 246 | if (!router_ifinfo) { |
| 247 | batadv_gw_reselect(bat_priv); |
| 248 | goto out; |
| 249 | } |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | if ((curr_gw) && (!next_gw)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 253 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 254 | "Removing selected gateway - no gateway in range\n"); |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 255 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_DEL, |
| 256 | NULL); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 257 | } else if ((!curr_gw) && (next_gw)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 258 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 259 | "Adding route to gateway %pM (bandwidth: %u.%u/%u.%u MBit, tq: %i)\n", |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 260 | next_gw->orig_node->orig, |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 261 | next_gw->bandwidth_down / 10, |
| 262 | next_gw->bandwidth_down % 10, |
| 263 | next_gw->bandwidth_up / 10, |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 264 | next_gw->bandwidth_up % 10, |
| 265 | router_ifinfo->bat_iv.tq_avg); |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 266 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_ADD, |
| 267 | gw_addr); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 268 | } else { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 269 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 270 | "Changing route to gateway %pM (bandwidth: %u.%u/%u.%u MBit, tq: %i)\n", |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 271 | next_gw->orig_node->orig, |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 272 | next_gw->bandwidth_down / 10, |
| 273 | next_gw->bandwidth_down % 10, |
| 274 | next_gw->bandwidth_up / 10, |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 275 | next_gw->bandwidth_up % 10, |
| 276 | router_ifinfo->bat_iv.tq_avg); |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 277 | batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_CHANGE, |
| 278 | gw_addr); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 279 | } |
| 280 | |
Sven Eckelmann | 1409a83 | 2012-05-12 18:33:55 +0200 | [diff] [blame] | 281 | batadv_gw_select(bat_priv, next_gw); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 282 | |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 283 | out: |
| 284 | if (curr_gw) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 285 | batadv_gw_node_put(curr_gw); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 286 | if (next_gw) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 287 | batadv_gw_node_put(next_gw); |
Antonio Quartulli | 2265c14 | 2011-04-27 00:22:00 +0200 | [diff] [blame] | 288 | if (router) |
Sven Eckelmann | 25bb250 | 2016-01-17 11:01:11 +0100 | [diff] [blame] | 289 | batadv_neigh_node_put(router); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 290 | if (router_ifinfo) |
Sven Eckelmann | 044fa3a | 2016-01-17 11:01:12 +0100 | [diff] [blame] | 291 | batadv_neigh_ifinfo_put(router_ifinfo); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 292 | } |
| 293 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 294 | void batadv_gw_check_election(struct batadv_priv *bat_priv, |
| 295 | struct batadv_orig_node *orig_node) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 296 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 297 | struct batadv_orig_node *curr_gw_orig; |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 298 | |
| 299 | /* abort immediately if the routing algorithm does not support gateway |
| 300 | * election |
| 301 | */ |
| 302 | if (!bat_priv->algo_ops->gw.is_eligible) |
| 303 | return; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 304 | |
Sven Eckelmann | 7cf06bc | 2012-05-12 02:09:29 +0200 | [diff] [blame] | 305 | curr_gw_orig = batadv_gw_get_selected_orig(bat_priv); |
Linus Lüssing | 57f0c07 | 2011-03-14 22:43:33 +0000 | [diff] [blame] | 306 | if (!curr_gw_orig) |
Antonio Quartulli | 4e820e7 | 2013-11-04 20:59:41 +0100 | [diff] [blame] | 307 | goto reselect; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 308 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 309 | /* this node already is the gateway */ |
Linus Lüssing | 57f0c07 | 2011-03-14 22:43:33 +0000 | [diff] [blame] | 310 | if (curr_gw_orig == orig_node) |
Linus Lüssing | e1a5382f | 2011-03-14 22:43:37 +0000 | [diff] [blame] | 311 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 312 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 313 | if (!bat_priv->algo_ops->gw.is_eligible(bat_priv, curr_gw_orig, |
| 314 | orig_node)) |
Linus Lüssing | e1a5382f | 2011-03-14 22:43:37 +0000 | [diff] [blame] | 315 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 316 | |
Antonio Quartulli | 4e820e7 | 2013-11-04 20:59:41 +0100 | [diff] [blame] | 317 | reselect: |
| 318 | batadv_gw_reselect(bat_priv); |
Linus Lüssing | 5d02b3c | 2011-02-13 21:13:02 +0000 | [diff] [blame] | 319 | out: |
Linus Lüssing | 57f0c07 | 2011-03-14 22:43:33 +0000 | [diff] [blame] | 320 | if (curr_gw_orig) |
Sven Eckelmann | 5d96731 | 2016-01-17 11:01:09 +0100 | [diff] [blame] | 321 | batadv_orig_node_put(curr_gw_orig); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 322 | } |
| 323 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 324 | /** |
| 325 | * batadv_gw_node_add - add gateway node to list of available gateways |
| 326 | * @bat_priv: the bat priv with all the soft interface information |
| 327 | * @orig_node: originator announcing gateway capabilities |
| 328 | * @gateway: announced bandwidth information |
Sven Eckelmann | 3c3e542 | 2020-03-16 23:31:01 +0100 | [diff] [blame] | 329 | * |
| 330 | * Has to be called with the appropriate locks being acquired |
| 331 | * (gw.list_lock). |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 332 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 333 | static void batadv_gw_node_add(struct batadv_priv *bat_priv, |
| 334 | struct batadv_orig_node *orig_node, |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 335 | struct batadv_tvlv_gateway_data *gateway) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 336 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 337 | struct batadv_gw_node *gw_node; |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 338 | |
Sven Eckelmann | 3c3e542 | 2020-03-16 23:31:01 +0100 | [diff] [blame] | 339 | lockdep_assert_held(&bat_priv->gw.list_lock); |
| 340 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 341 | if (gateway->bandwidth_down == 0) |
| 342 | return; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 343 | |
Antonio Quartulli | 377fe0f | 2014-05-02 01:35:13 +0200 | [diff] [blame] | 344 | gw_node = kzalloc(sizeof(*gw_node), GFP_ATOMIC); |
Sven Eckelmann | c3ba37a7 | 2016-03-05 16:09:23 +0100 | [diff] [blame] | 345 | if (!gw_node) |
Antonio Quartulli | 377fe0f | 2014-05-02 01:35:13 +0200 | [diff] [blame] | 346 | return; |
Antonio Quartulli | 377fe0f | 2014-05-02 01:35:13 +0200 | [diff] [blame] | 347 | |
Sven Eckelmann | f665fa7 | 2016-07-15 17:39:27 +0200 | [diff] [blame] | 348 | kref_init(&gw_node->refcount); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 349 | INIT_HLIST_NODE(&gw_node->list); |
Sven Eckelmann | 55db2d5 | 2016-07-15 17:39:21 +0200 | [diff] [blame] | 350 | kref_get(&orig_node->refcount); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 351 | gw_node->orig_node = orig_node; |
Simon Wunderlich | 27a4d5e | 2015-06-24 14:50:19 +0200 | [diff] [blame] | 352 | gw_node->bandwidth_down = ntohl(gateway->bandwidth_down); |
| 353 | gw_node->bandwidth_up = ntohl(gateway->bandwidth_up); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 354 | |
Sven Eckelmann | f665fa7 | 2016-07-15 17:39:27 +0200 | [diff] [blame] | 355 | kref_get(&gw_node->refcount); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 356 | hlist_add_head_rcu(&gw_node->list, &bat_priv->gw.list); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 357 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 358 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 359 | "Found new gateway %pM -> gw bandwidth: %u.%u/%u.%u MBit\n", |
| 360 | orig_node->orig, |
| 361 | ntohl(gateway->bandwidth_down) / 10, |
| 362 | ntohl(gateway->bandwidth_down) % 10, |
| 363 | ntohl(gateway->bandwidth_up) / 10, |
| 364 | ntohl(gateway->bandwidth_up) % 10); |
Sven Eckelmann | f665fa7 | 2016-07-15 17:39:27 +0200 | [diff] [blame] | 365 | |
| 366 | /* don't return reference to new gw_node */ |
| 367 | batadv_gw_node_put(gw_node); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 368 | } |
| 369 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 370 | /** |
| 371 | * batadv_gw_node_get - retrieve gateway node from list of available gateways |
| 372 | * @bat_priv: the bat priv with all the soft interface information |
| 373 | * @orig_node: originator announcing gateway capabilities |
| 374 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 375 | * Return: gateway node if found or NULL otherwise. |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 376 | */ |
Antonio Quartulli | 50164d8 | 2016-07-03 12:46:34 +0200 | [diff] [blame] | 377 | struct batadv_gw_node *batadv_gw_node_get(struct batadv_priv *bat_priv, |
| 378 | struct batadv_orig_node *orig_node) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 379 | { |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 380 | struct batadv_gw_node *gw_node_tmp, *gw_node = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 381 | |
| 382 | rcu_read_lock(); |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 383 | hlist_for_each_entry_rcu(gw_node_tmp, &bat_priv->gw.list, list) { |
| 384 | if (gw_node_tmp->orig_node != orig_node) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 385 | continue; |
| 386 | |
Sven Eckelmann | e7aed32 | 2016-01-16 10:29:41 +0100 | [diff] [blame] | 387 | if (!kref_get_unless_zero(&gw_node_tmp->refcount)) |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 388 | continue; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 389 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 390 | gw_node = gw_node_tmp; |
| 391 | break; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 392 | } |
Marek Lindner | c4aac1a | 2011-03-23 11:24:34 +0100 | [diff] [blame] | 393 | rcu_read_unlock(); |
Antonio Quartulli | 71e4aa9 | 2011-04-25 22:44:32 +0200 | [diff] [blame] | 394 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 395 | return gw_node; |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * batadv_gw_node_update - update list of available gateways with changed |
| 400 | * bandwidth information |
| 401 | * @bat_priv: the bat priv with all the soft interface information |
| 402 | * @orig_node: originator announcing gateway capabilities |
| 403 | * @gateway: announced bandwidth information |
| 404 | */ |
| 405 | void batadv_gw_node_update(struct batadv_priv *bat_priv, |
| 406 | struct batadv_orig_node *orig_node, |
| 407 | struct batadv_tvlv_gateway_data *gateway) |
| 408 | { |
| 409 | struct batadv_gw_node *gw_node, *curr_gw = NULL; |
| 410 | |
Sven Eckelmann | 3c3e542 | 2020-03-16 23:31:01 +0100 | [diff] [blame] | 411 | spin_lock_bh(&bat_priv->gw.list_lock); |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 412 | gw_node = batadv_gw_node_get(bat_priv, orig_node); |
| 413 | if (!gw_node) { |
| 414 | batadv_gw_node_add(bat_priv, orig_node, gateway); |
Sven Eckelmann | 3c3e542 | 2020-03-16 23:31:01 +0100 | [diff] [blame] | 415 | spin_unlock_bh(&bat_priv->gw.list_lock); |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 416 | goto out; |
| 417 | } |
Sven Eckelmann | 3c3e542 | 2020-03-16 23:31:01 +0100 | [diff] [blame] | 418 | spin_unlock_bh(&bat_priv->gw.list_lock); |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 419 | |
| 420 | if ((gw_node->bandwidth_down == ntohl(gateway->bandwidth_down)) && |
| 421 | (gw_node->bandwidth_up == ntohl(gateway->bandwidth_up))) |
| 422 | goto out; |
| 423 | |
| 424 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 425 | "Gateway bandwidth of originator %pM changed from %u.%u/%u.%u MBit to %u.%u/%u.%u MBit\n", |
| 426 | orig_node->orig, |
| 427 | gw_node->bandwidth_down / 10, |
| 428 | gw_node->bandwidth_down % 10, |
| 429 | gw_node->bandwidth_up / 10, |
| 430 | gw_node->bandwidth_up % 10, |
| 431 | ntohl(gateway->bandwidth_down) / 10, |
| 432 | ntohl(gateway->bandwidth_down) % 10, |
| 433 | ntohl(gateway->bandwidth_up) / 10, |
| 434 | ntohl(gateway->bandwidth_up) % 10); |
| 435 | |
| 436 | gw_node->bandwidth_down = ntohl(gateway->bandwidth_down); |
| 437 | gw_node->bandwidth_up = ntohl(gateway->bandwidth_up); |
| 438 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 439 | if (ntohl(gateway->bandwidth_down) == 0) { |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 440 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 441 | "Gateway %pM removed from gateway list\n", |
| 442 | orig_node->orig); |
| 443 | |
| 444 | /* Note: We don't need a NULL check here, since curr_gw never |
| 445 | * gets dereferenced. |
| 446 | */ |
Simon Wunderlich | bd3524c | 2015-08-03 19:13:58 +0200 | [diff] [blame] | 447 | spin_lock_bh(&bat_priv->gw.list_lock); |
Sven Eckelmann | c18bdd0 | 2016-01-31 13:27:59 +0100 | [diff] [blame] | 448 | if (!hlist_unhashed(&gw_node->list)) { |
| 449 | hlist_del_init_rcu(&gw_node->list); |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 450 | batadv_gw_node_put(gw_node); |
Sven Eckelmann | c18bdd0 | 2016-01-31 13:27:59 +0100 | [diff] [blame] | 451 | } |
Simon Wunderlich | bd3524c | 2015-08-03 19:13:58 +0200 | [diff] [blame] | 452 | spin_unlock_bh(&bat_priv->gw.list_lock); |
| 453 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 454 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
| 455 | if (gw_node == curr_gw) |
Antonio Quartulli | 4e820e7 | 2013-11-04 20:59:41 +0100 | [diff] [blame] | 456 | batadv_gw_reselect(bat_priv); |
Simon Wunderlich | bd3524c | 2015-08-03 19:13:58 +0200 | [diff] [blame] | 457 | |
| 458 | if (curr_gw) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 459 | batadv_gw_node_put(curr_gw); |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | out: |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 463 | if (gw_node) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 464 | batadv_gw_node_put(gw_node); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 465 | } |
| 466 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 467 | void batadv_gw_node_delete(struct batadv_priv *bat_priv, |
| 468 | struct batadv_orig_node *orig_node) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 469 | { |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 470 | struct batadv_tvlv_gateway_data gateway; |
| 471 | |
| 472 | gateway.bandwidth_down = 0; |
| 473 | gateway.bandwidth_up = 0; |
| 474 | |
| 475 | batadv_gw_node_update(bat_priv, orig_node, &gateway); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 476 | } |
| 477 | |
Simon Wunderlich | bd3524c | 2015-08-03 19:13:58 +0200 | [diff] [blame] | 478 | void batadv_gw_node_free(struct batadv_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 479 | { |
Simon Wunderlich | bd3524c | 2015-08-03 19:13:58 +0200 | [diff] [blame] | 480 | struct batadv_gw_node *gw_node; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 481 | struct hlist_node *node_tmp; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 482 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 483 | spin_lock_bh(&bat_priv->gw.list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 484 | hlist_for_each_entry_safe(gw_node, node_tmp, |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 485 | &bat_priv->gw.list, list) { |
Simon Wunderlich | bd3524c | 2015-08-03 19:13:58 +0200 | [diff] [blame] | 486 | hlist_del_init_rcu(&gw_node->list); |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 487 | batadv_gw_node_put(gw_node); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 488 | } |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 489 | spin_unlock_bh(&bat_priv->gw.list_lock); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 490 | } |
| 491 | |
Sven Eckelmann | dc1cbd1 | 2016-07-16 09:31:20 +0200 | [diff] [blame] | 492 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
Sven Eckelmann | 7cf06bc | 2012-05-12 02:09:29 +0200 | [diff] [blame] | 493 | int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 494 | { |
| 495 | struct net_device *net_dev = (struct net_device *)seq->private; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 496 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
| 497 | struct batadv_hard_iface *primary_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 498 | |
Marek Lindner | 30da63a | 2012-08-03 17:15:46 +0200 | [diff] [blame] | 499 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
| 500 | if (!primary_if) |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 501 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 502 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 503 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 504 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 505 | primary_if->net_dev->dev_addr, net_dev->name, |
| 506 | bat_priv->algo_ops->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 507 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 508 | batadv_hardif_put(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 509 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 510 | if (!bat_priv->algo_ops->gw.print) { |
| 511 | seq_puts(seq, |
| 512 | "No printing function for this routing protocol\n"); |
| 513 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 514 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 515 | |
Antonio Quartulli | 34d99cf | 2016-07-03 12:46:33 +0200 | [diff] [blame] | 516 | bat_priv->algo_ops->gw.print(bat_priv, seq); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 517 | |
Marek Lindner | 30da63a | 2012-08-03 17:15:46 +0200 | [diff] [blame] | 518 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 519 | } |
Sven Eckelmann | dc1cbd1 | 2016-07-16 09:31:20 +0200 | [diff] [blame] | 520 | #endif |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 521 | |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 522 | /** |
Sven Eckelmann | d7129da | 2016-07-03 13:31:42 +0200 | [diff] [blame] | 523 | * batadv_gw_dump - Dump gateways into a message |
| 524 | * @msg: Netlink message to dump into |
| 525 | * @cb: Control block containing additional options |
| 526 | * |
| 527 | * Return: Error code, or length of message |
| 528 | */ |
| 529 | int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb) |
| 530 | { |
| 531 | struct batadv_hard_iface *primary_if = NULL; |
| 532 | struct net *net = sock_net(cb->skb->sk); |
| 533 | struct net_device *soft_iface; |
| 534 | struct batadv_priv *bat_priv; |
| 535 | int ifindex; |
| 536 | int ret; |
| 537 | |
| 538 | ifindex = batadv_netlink_get_ifindex(cb->nlh, |
| 539 | BATADV_ATTR_MESH_IFINDEX); |
| 540 | if (!ifindex) |
| 541 | return -EINVAL; |
| 542 | |
| 543 | soft_iface = dev_get_by_index(net, ifindex); |
| 544 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { |
| 545 | ret = -ENODEV; |
| 546 | goto out; |
| 547 | } |
| 548 | |
| 549 | bat_priv = netdev_priv(soft_iface); |
| 550 | |
| 551 | primary_if = batadv_primary_if_get_selected(bat_priv); |
| 552 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { |
| 553 | ret = -ENOENT; |
| 554 | goto out; |
| 555 | } |
| 556 | |
| 557 | if (!bat_priv->algo_ops->gw.dump) { |
| 558 | ret = -EOPNOTSUPP; |
| 559 | goto out; |
| 560 | } |
| 561 | |
| 562 | bat_priv->algo_ops->gw.dump(msg, cb, bat_priv); |
| 563 | |
| 564 | ret = msg->len; |
| 565 | |
| 566 | out: |
| 567 | if (primary_if) |
| 568 | batadv_hardif_put(primary_if); |
| 569 | if (soft_iface) |
| 570 | dev_put(soft_iface); |
| 571 | |
| 572 | return ret; |
| 573 | } |
| 574 | |
| 575 | /** |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 576 | * batadv_gw_dhcp_recipient_get - check if a packet is a DHCP message |
| 577 | * @skb: the packet to check |
| 578 | * @header_len: a pointer to the batman-adv header size |
| 579 | * @chaddr: buffer where the client address will be stored. Valid |
| 580 | * only if the function returns BATADV_DHCP_TO_CLIENT |
| 581 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 582 | * This function may re-allocate the data buffer of the skb passed as argument. |
| 583 | * |
| 584 | * Return: |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 585 | * - BATADV_DHCP_NO if the packet is not a dhcp message or if there was an error |
| 586 | * while parsing it |
| 587 | * - BATADV_DHCP_TO_SERVER if this is a message going to the DHCP server |
| 588 | * - BATADV_DHCP_TO_CLIENT if this is a message going to a DHCP client |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 589 | */ |
| 590 | enum batadv_dhcp_recipient |
| 591 | batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len, |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 592 | u8 *chaddr) |
Antonio Quartulli | 43676ab5 | 2011-04-26 21:31:45 +0200 | [diff] [blame] | 593 | { |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 594 | enum batadv_dhcp_recipient ret = BATADV_DHCP_NO; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 595 | struct ethhdr *ethhdr; |
| 596 | struct iphdr *iphdr; |
| 597 | struct ipv6hdr *ipv6hdr; |
| 598 | struct udphdr *udphdr; |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 599 | struct vlan_ethhdr *vhdr; |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 600 | int chaddr_offset; |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 601 | __be16 proto; |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 602 | u8 *p; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 603 | |
| 604 | /* check for ethernet header */ |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 605 | if (!pskb_may_pull(skb, *header_len + ETH_HLEN)) |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 606 | return BATADV_DHCP_NO; |
| 607 | |
Linus Lüssing | 927c2ed | 2014-01-19 22:22:45 +0100 | [diff] [blame] | 608 | ethhdr = eth_hdr(skb); |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 609 | proto = ethhdr->h_proto; |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 610 | *header_len += ETH_HLEN; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 611 | |
| 612 | /* check for initial vlan header */ |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 613 | if (proto == htons(ETH_P_8021Q)) { |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 614 | if (!pskb_may_pull(skb, *header_len + VLAN_HLEN)) |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 615 | return BATADV_DHCP_NO; |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 616 | |
Linus Lüssing | 927c2ed | 2014-01-19 22:22:45 +0100 | [diff] [blame] | 617 | vhdr = vlan_eth_hdr(skb); |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 618 | proto = vhdr->h_vlan_encapsulated_proto; |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 619 | *header_len += VLAN_HLEN; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | /* check for ip header */ |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 623 | switch (proto) { |
| 624 | case htons(ETH_P_IP): |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 625 | if (!pskb_may_pull(skb, *header_len + sizeof(*iphdr))) |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 626 | return BATADV_DHCP_NO; |
| 627 | |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 628 | iphdr = (struct iphdr *)(skb->data + *header_len); |
| 629 | *header_len += iphdr->ihl * 4; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 630 | |
| 631 | /* check for udp header */ |
| 632 | if (iphdr->protocol != IPPROTO_UDP) |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 633 | return BATADV_DHCP_NO; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 634 | |
| 635 | break; |
Antonio Quartulli | f7f8ed5 | 2013-05-12 21:51:15 +0200 | [diff] [blame] | 636 | case htons(ETH_P_IPV6): |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 637 | if (!pskb_may_pull(skb, *header_len + sizeof(*ipv6hdr))) |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 638 | return BATADV_DHCP_NO; |
| 639 | |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 640 | ipv6hdr = (struct ipv6hdr *)(skb->data + *header_len); |
| 641 | *header_len += sizeof(*ipv6hdr); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 642 | |
| 643 | /* check for udp header */ |
| 644 | if (ipv6hdr->nexthdr != IPPROTO_UDP) |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 645 | return BATADV_DHCP_NO; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 646 | |
| 647 | break; |
| 648 | default: |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 649 | return BATADV_DHCP_NO; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 650 | } |
| 651 | |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 652 | if (!pskb_may_pull(skb, *header_len + sizeof(*udphdr))) |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 653 | return BATADV_DHCP_NO; |
Linus Lüssing | 9d2c948 | 2013-08-06 20:21:15 +0200 | [diff] [blame] | 654 | |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 655 | udphdr = (struct udphdr *)(skb->data + *header_len); |
| 656 | *header_len += sizeof(*udphdr); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 657 | |
| 658 | /* check for bootp port */ |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 659 | switch (proto) { |
| 660 | case htons(ETH_P_IP): |
| 661 | if (udphdr->dest == htons(67)) |
| 662 | ret = BATADV_DHCP_TO_SERVER; |
| 663 | else if (udphdr->source == htons(67)) |
| 664 | ret = BATADV_DHCP_TO_CLIENT; |
| 665 | break; |
| 666 | case htons(ETH_P_IPV6): |
| 667 | if (udphdr->dest == htons(547)) |
| 668 | ret = BATADV_DHCP_TO_SERVER; |
| 669 | else if (udphdr->source == htons(547)) |
| 670 | ret = BATADV_DHCP_TO_CLIENT; |
| 671 | break; |
| 672 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 673 | |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 674 | chaddr_offset = *header_len + BATADV_DHCP_CHADDR_OFFSET; |
| 675 | /* store the client address if the message is going to a client */ |
| 676 | if (ret == BATADV_DHCP_TO_CLIENT && |
| 677 | pskb_may_pull(skb, chaddr_offset + ETH_ALEN)) { |
| 678 | /* check if the DHCP packet carries an Ethernet DHCP */ |
| 679 | p = skb->data + *header_len + BATADV_DHCP_HTYPE_OFFSET; |
| 680 | if (*p != BATADV_DHCP_HTYPE_ETHERNET) |
| 681 | return BATADV_DHCP_NO; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 682 | |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 683 | /* check if the DHCP packet carries a valid Ethernet address */ |
| 684 | p = skb->data + *header_len + BATADV_DHCP_HLEN_OFFSET; |
| 685 | if (*p != ETH_ALEN) |
| 686 | return BATADV_DHCP_NO; |
| 687 | |
Antonio Quartulli | 8fdd015 | 2014-01-22 00:42:11 +0100 | [diff] [blame] | 688 | ether_addr_copy(chaddr, skb->data + chaddr_offset); |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | return ret; |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 692 | } |
Antonio Quartulli | aa143d2 | 2014-09-01 14:37:27 +0200 | [diff] [blame] | 693 | |
Antonio Quartulli | bbb877e | 2013-06-04 12:11:42 +0200 | [diff] [blame] | 694 | /** |
| 695 | * batadv_gw_out_of_range - check if the dhcp request destination is the best gw |
| 696 | * @bat_priv: the bat priv with all the soft interface information |
| 697 | * @skb: the outgoing packet |
| 698 | * |
| 699 | * Check if the skb is a DHCP request and if it is sent to the current best GW |
| 700 | * server. Due to topology changes it may be the case that the GW server |
| 701 | * previously selected is not the best one anymore. |
| 702 | * |
Antonio Quartulli | bbb877e | 2013-06-04 12:11:42 +0200 | [diff] [blame] | 703 | * This call might reallocate skb data. |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 704 | * Must be invoked only when the DHCP packet is going TO a DHCP SERVER. |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 705 | * |
| 706 | * Return: true if the packet destination is unicast and it is not the best gw, |
| 707 | * false otherwise. |
Antonio Quartulli | bbb877e | 2013-06-04 12:11:42 +0200 | [diff] [blame] | 708 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 709 | bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, |
Linus Lüssing | 9d2c948 | 2013-08-06 20:21:15 +0200 | [diff] [blame] | 710 | struct sk_buff *skb) |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 711 | { |
Sven Eckelmann | 4f248cf | 2015-06-09 20:50:49 +0200 | [diff] [blame] | 712 | struct batadv_neigh_node *neigh_curr = NULL; |
| 713 | struct batadv_neigh_node *neigh_old = NULL; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 714 | struct batadv_orig_node *orig_dst_node = NULL; |
Sven Eckelmann | 4f248cf | 2015-06-09 20:50:49 +0200 | [diff] [blame] | 715 | struct batadv_gw_node *gw_node = NULL; |
| 716 | struct batadv_gw_node *curr_gw = NULL; |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 717 | struct batadv_neigh_ifinfo *curr_ifinfo, *old_ifinfo; |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 718 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; |
| 719 | bool out_of_range = false; |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 720 | u8 curr_tq_avg; |
Antonio Quartulli | bbb877e | 2013-06-04 12:11:42 +0200 | [diff] [blame] | 721 | unsigned short vid; |
| 722 | |
| 723 | vid = batadv_get_vid(skb, 0); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 724 | |
Linus Lüssing | 511d945 | 2018-03-22 00:21:32 +0100 | [diff] [blame] | 725 | if (is_multicast_ether_addr(ethhdr->h_dest)) |
| 726 | goto out; |
| 727 | |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 728 | orig_dst_node = batadv_transtable_search(bat_priv, ethhdr->h_source, |
Antonio Quartulli | bbb877e | 2013-06-04 12:11:42 +0200 | [diff] [blame] | 729 | ethhdr->h_dest, vid); |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 730 | if (!orig_dst_node) |
| 731 | goto out; |
| 732 | |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 733 | gw_node = batadv_gw_node_get(bat_priv, orig_dst_node); |
Antonio Quartulli | 0d16449 | 2014-12-20 13:48:57 +0100 | [diff] [blame] | 734 | if (!gw_node) |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 735 | goto out; |
| 736 | |
Antonio Quartulli | 3a24a63 | 2016-05-06 02:46:38 +0800 | [diff] [blame] | 737 | switch (atomic_read(&bat_priv->gw.mode)) { |
Sven Eckelmann | cd646ab | 2012-06-03 22:19:18 +0200 | [diff] [blame] | 738 | case BATADV_GW_MODE_SERVER: |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 739 | /* If we are a GW then we are our best GW. We can artificially |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 740 | * set the tq towards ourself as the maximum value |
| 741 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 742 | curr_tq_avg = BATADV_TQ_MAX_VALUE; |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 743 | break; |
Sven Eckelmann | cd646ab | 2012-06-03 22:19:18 +0200 | [diff] [blame] | 744 | case BATADV_GW_MODE_CLIENT: |
Sven Eckelmann | 1409a83 | 2012-05-12 18:33:55 +0200 | [diff] [blame] | 745 | curr_gw = batadv_gw_get_selected_gw_node(bat_priv); |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 746 | if (!curr_gw) |
| 747 | goto out; |
| 748 | |
| 749 | /* packet is going to our gateway */ |
| 750 | if (curr_gw->orig_node == orig_dst_node) |
| 751 | goto out; |
| 752 | |
| 753 | /* If the dhcp packet has been sent to a different gw, |
| 754 | * we have to evaluate whether the old gw is still |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 755 | * reliable enough |
| 756 | */ |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 757 | neigh_curr = batadv_find_router(bat_priv, curr_gw->orig_node, |
| 758 | NULL); |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 759 | if (!neigh_curr) |
| 760 | goto out; |
| 761 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 762 | curr_ifinfo = batadv_neigh_ifinfo_get(neigh_curr, |
| 763 | BATADV_IF_DEFAULT); |
| 764 | if (!curr_ifinfo) |
| 765 | goto out; |
| 766 | |
| 767 | curr_tq_avg = curr_ifinfo->bat_iv.tq_avg; |
Sven Eckelmann | 044fa3a | 2016-01-17 11:01:12 +0100 | [diff] [blame] | 768 | batadv_neigh_ifinfo_put(curr_ifinfo); |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 769 | |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 770 | break; |
Sven Eckelmann | cd646ab | 2012-06-03 22:19:18 +0200 | [diff] [blame] | 771 | case BATADV_GW_MODE_OFF: |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 772 | default: |
| 773 | goto out; |
Antonio Quartulli | 43676ab5 | 2011-04-26 21:31:45 +0200 | [diff] [blame] | 774 | } |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 775 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 776 | neigh_old = batadv_find_router(bat_priv, orig_dst_node, NULL); |
Dan Carpenter | 2ef04f4 | 2011-11-29 09:09:09 +0300 | [diff] [blame] | 777 | if (!neigh_old) |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 778 | goto out; |
| 779 | |
Simon Wunderlich | 8965233 | 2013-11-13 19:14:46 +0100 | [diff] [blame] | 780 | old_ifinfo = batadv_neigh_ifinfo_get(neigh_old, BATADV_IF_DEFAULT); |
| 781 | if (!old_ifinfo) |
| 782 | goto out; |
| 783 | |
| 784 | if ((curr_tq_avg - old_ifinfo->bat_iv.tq_avg) > BATADV_GW_THRESHOLD) |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 785 | out_of_range = true; |
Sven Eckelmann | 044fa3a | 2016-01-17 11:01:12 +0100 | [diff] [blame] | 786 | batadv_neigh_ifinfo_put(old_ifinfo); |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 787 | |
| 788 | out: |
| 789 | if (orig_dst_node) |
Sven Eckelmann | 5d96731 | 2016-01-17 11:01:09 +0100 | [diff] [blame] | 790 | batadv_orig_node_put(orig_dst_node); |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 791 | if (curr_gw) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 792 | batadv_gw_node_put(curr_gw); |
Marek Lindner | 414254e | 2013-04-23 21:39:58 +0800 | [diff] [blame] | 793 | if (gw_node) |
Sven Eckelmann | 3a01743 | 2016-01-17 11:01:18 +0100 | [diff] [blame] | 794 | batadv_gw_node_put(gw_node); |
Antonio Quartulli | 43676ab5 | 2011-04-26 21:31:45 +0200 | [diff] [blame] | 795 | if (neigh_old) |
Sven Eckelmann | 25bb250 | 2016-01-17 11:01:11 +0100 | [diff] [blame] | 796 | batadv_neigh_node_put(neigh_old); |
Antonio Quartulli | 43676ab5 | 2011-04-26 21:31:45 +0200 | [diff] [blame] | 797 | if (neigh_curr) |
Sven Eckelmann | 25bb250 | 2016-01-17 11:01:11 +0100 | [diff] [blame] | 798 | batadv_neigh_node_put(neigh_curr); |
Marek Lindner | be7af5c | 2011-09-08 13:12:53 +0200 | [diff] [blame] | 799 | return out_of_range; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 800 | } |