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707 lines
19 KiB
707 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Copyright (C) B.A.T.M.A.N. contributors: |
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* |
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* Marek Lindner, Simon Wunderlich |
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*/ |
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#include "main.h" |
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#include <linux/atomic.h> |
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#include <linux/build_bug.h> |
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#include <linux/byteorder/generic.h> |
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#include <linux/crc32c.h> |
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#include <linux/device.h> |
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#include <linux/errno.h> |
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#include <linux/genetlink.h> |
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#include <linux/gfp.h> |
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#include <linux/if_ether.h> |
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#include <linux/if_vlan.h> |
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#include <linux/init.h> |
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#include <linux/ip.h> |
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#include <linux/ipv6.h> |
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#include <linux/kernel.h> |
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#include <linux/kobject.h> |
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#include <linux/kref.h> |
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#include <linux/list.h> |
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#include <linux/minmax.h> |
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#include <linux/module.h> |
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#include <linux/netdevice.h> |
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#include <linux/printk.h> |
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#include <linux/rculist.h> |
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#include <linux/rcupdate.h> |
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#include <linux/skbuff.h> |
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#include <linux/slab.h> |
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#include <linux/spinlock.h> |
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#include <linux/stddef.h> |
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#include <linux/string.h> |
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#include <linux/workqueue.h> |
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#include <net/dsfield.h> |
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#include <net/rtnetlink.h> |
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#include <uapi/linux/batadv_packet.h> |
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#include <uapi/linux/batman_adv.h> |
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#include "bat_algo.h" |
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#include "bat_iv_ogm.h" |
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#include "bat_v.h" |
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#include "bridge_loop_avoidance.h" |
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#include "distributed-arp-table.h" |
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#include "gateway_client.h" |
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#include "gateway_common.h" |
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#include "hard-interface.h" |
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#include "log.h" |
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#include "multicast.h" |
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#include "netlink.h" |
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#include "network-coding.h" |
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#include "originator.h" |
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#include "routing.h" |
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#include "send.h" |
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#include "soft-interface.h" |
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#include "tp_meter.h" |
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#include "translation-table.h" |
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/* List manipulations on hardif_list have to be rtnl_lock()'ed, |
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* list traversals just rcu-locked |
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*/ |
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struct list_head batadv_hardif_list; |
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unsigned int batadv_hardif_generation; |
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static int (*batadv_rx_handler[256])(struct sk_buff *skb, |
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struct batadv_hard_iface *recv_if); |
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unsigned char batadv_broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
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struct workqueue_struct *batadv_event_workqueue; |
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static void batadv_recv_handler_init(void); |
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#define BATADV_UEV_TYPE_VAR "BATTYPE=" |
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#define BATADV_UEV_ACTION_VAR "BATACTION=" |
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#define BATADV_UEV_DATA_VAR "BATDATA=" |
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static char *batadv_uev_action_str[] = { |
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"add", |
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"del", |
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"change", |
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"loopdetect", |
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}; |
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static char *batadv_uev_type_str[] = { |
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"gw", |
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"bla", |
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}; |
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static int __init batadv_init(void) |
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{ |
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int ret; |
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ret = batadv_tt_cache_init(); |
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if (ret < 0) |
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return ret; |
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INIT_LIST_HEAD(&batadv_hardif_list); |
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batadv_algo_init(); |
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batadv_recv_handler_init(); |
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batadv_v_init(); |
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batadv_iv_init(); |
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batadv_nc_init(); |
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batadv_tp_meter_init(); |
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batadv_event_workqueue = create_singlethread_workqueue("bat_events"); |
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if (!batadv_event_workqueue) |
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goto err_create_wq; |
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register_netdevice_notifier(&batadv_hard_if_notifier); |
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rtnl_link_register(&batadv_link_ops); |
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batadv_netlink_register(); |
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pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n", |
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BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION); |
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return 0; |
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err_create_wq: |
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batadv_tt_cache_destroy(); |
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return -ENOMEM; |
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} |
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static void __exit batadv_exit(void) |
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{ |
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batadv_netlink_unregister(); |
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rtnl_link_unregister(&batadv_link_ops); |
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unregister_netdevice_notifier(&batadv_hard_if_notifier); |
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flush_workqueue(batadv_event_workqueue); |
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destroy_workqueue(batadv_event_workqueue); |
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batadv_event_workqueue = NULL; |
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rcu_barrier(); |
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batadv_tt_cache_destroy(); |
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} |
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/** |
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* batadv_mesh_init() - Initialize soft interface |
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* @soft_iface: netdev struct of the soft interface |
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* |
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* Return: 0 on success or negative error number in case of failure |
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*/ |
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int batadv_mesh_init(struct net_device *soft_iface) |
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{ |
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struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
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int ret; |
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spin_lock_init(&bat_priv->forw_bat_list_lock); |
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spin_lock_init(&bat_priv->forw_bcast_list_lock); |
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spin_lock_init(&bat_priv->tt.changes_list_lock); |
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spin_lock_init(&bat_priv->tt.req_list_lock); |
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spin_lock_init(&bat_priv->tt.roam_list_lock); |
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spin_lock_init(&bat_priv->tt.last_changeset_lock); |
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spin_lock_init(&bat_priv->tt.commit_lock); |
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spin_lock_init(&bat_priv->gw.list_lock); |
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#ifdef CONFIG_BATMAN_ADV_MCAST |
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spin_lock_init(&bat_priv->mcast.mla_lock); |
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spin_lock_init(&bat_priv->mcast.want_lists_lock); |
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#endif |
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spin_lock_init(&bat_priv->tvlv.container_list_lock); |
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spin_lock_init(&bat_priv->tvlv.handler_list_lock); |
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spin_lock_init(&bat_priv->softif_vlan_list_lock); |
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spin_lock_init(&bat_priv->tp_list_lock); |
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INIT_HLIST_HEAD(&bat_priv->forw_bat_list); |
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INIT_HLIST_HEAD(&bat_priv->forw_bcast_list); |
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INIT_HLIST_HEAD(&bat_priv->gw.gateway_list); |
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#ifdef CONFIG_BATMAN_ADV_MCAST |
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INIT_HLIST_HEAD(&bat_priv->mcast.want_all_unsnoopables_list); |
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INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv4_list); |
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INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv6_list); |
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#endif |
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INIT_LIST_HEAD(&bat_priv->tt.changes_list); |
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INIT_HLIST_HEAD(&bat_priv->tt.req_list); |
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INIT_LIST_HEAD(&bat_priv->tt.roam_list); |
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#ifdef CONFIG_BATMAN_ADV_MCAST |
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INIT_HLIST_HEAD(&bat_priv->mcast.mla_list); |
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#endif |
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INIT_HLIST_HEAD(&bat_priv->tvlv.container_list); |
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INIT_HLIST_HEAD(&bat_priv->tvlv.handler_list); |
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INIT_HLIST_HEAD(&bat_priv->softif_vlan_list); |
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INIT_HLIST_HEAD(&bat_priv->tp_list); |
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bat_priv->gw.generation = 0; |
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ret = batadv_v_mesh_init(bat_priv); |
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if (ret < 0) |
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goto err; |
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ret = batadv_originator_init(bat_priv); |
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if (ret < 0) |
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goto err; |
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ret = batadv_tt_init(bat_priv); |
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if (ret < 0) |
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goto err; |
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ret = batadv_bla_init(bat_priv); |
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if (ret < 0) |
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goto err; |
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ret = batadv_dat_init(bat_priv); |
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if (ret < 0) |
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goto err; |
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ret = batadv_nc_mesh_init(bat_priv); |
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if (ret < 0) |
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goto err; |
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batadv_gw_init(bat_priv); |
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batadv_mcast_init(bat_priv); |
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atomic_set(&bat_priv->gw.reselect, 0); |
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atomic_set(&bat_priv->mesh_state, BATADV_MESH_ACTIVE); |
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return 0; |
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err: |
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batadv_mesh_free(soft_iface); |
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return ret; |
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} |
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/** |
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* batadv_mesh_free() - Deinitialize soft interface |
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* @soft_iface: netdev struct of the soft interface |
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*/ |
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void batadv_mesh_free(struct net_device *soft_iface) |
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{ |
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struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
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atomic_set(&bat_priv->mesh_state, BATADV_MESH_DEACTIVATING); |
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batadv_purge_outstanding_packets(bat_priv, NULL); |
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batadv_gw_node_free(bat_priv); |
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batadv_v_mesh_free(bat_priv); |
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batadv_nc_mesh_free(bat_priv); |
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batadv_dat_free(bat_priv); |
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batadv_bla_free(bat_priv); |
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batadv_mcast_free(bat_priv); |
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/* Free the TT and the originator tables only after having terminated |
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* all the other depending components which may use these structures for |
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* their purposes. |
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*/ |
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batadv_tt_free(bat_priv); |
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/* Since the originator table clean up routine is accessing the TT |
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* tables as well, it has to be invoked after the TT tables have been |
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* freed and marked as empty. This ensures that no cleanup RCU callbacks |
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* accessing the TT data are scheduled for later execution. |
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*/ |
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batadv_originator_free(bat_priv); |
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batadv_gw_free(bat_priv); |
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free_percpu(bat_priv->bat_counters); |
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bat_priv->bat_counters = NULL; |
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atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
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} |
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/** |
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* batadv_is_my_mac() - check if the given mac address belongs to any of the |
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* real interfaces in the current mesh |
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* @bat_priv: the bat priv with all the soft interface information |
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* @addr: the address to check |
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* |
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* Return: 'true' if the mac address was found, false otherwise. |
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*/ |
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bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr) |
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{ |
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const struct batadv_hard_iface *hard_iface; |
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bool is_my_mac = false; |
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rcu_read_lock(); |
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list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
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if (hard_iface->if_status != BATADV_IF_ACTIVE) |
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continue; |
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if (hard_iface->soft_iface != bat_priv->soft_iface) |
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continue; |
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if (batadv_compare_eth(hard_iface->net_dev->dev_addr, addr)) { |
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is_my_mac = true; |
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break; |
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} |
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} |
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rcu_read_unlock(); |
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return is_my_mac; |
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} |
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/** |
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* batadv_max_header_len() - calculate maximum encapsulation overhead for a |
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* payload packet |
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* |
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* Return: the maximum encapsulation overhead in bytes. |
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*/ |
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int batadv_max_header_len(void) |
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{ |
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int header_len = 0; |
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header_len = max_t(int, header_len, |
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sizeof(struct batadv_unicast_packet)); |
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header_len = max_t(int, header_len, |
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sizeof(struct batadv_unicast_4addr_packet)); |
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header_len = max_t(int, header_len, |
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sizeof(struct batadv_bcast_packet)); |
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#ifdef CONFIG_BATMAN_ADV_NC |
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header_len = max_t(int, header_len, |
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sizeof(struct batadv_coded_packet)); |
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#endif |
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return header_len + ETH_HLEN; |
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} |
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/** |
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* batadv_skb_set_priority() - sets skb priority according to packet content |
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* @skb: the packet to be sent |
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* @offset: offset to the packet content |
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* |
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* This function sets a value between 256 and 263 (802.1d priority), which |
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* can be interpreted by the cfg80211 or other drivers. |
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*/ |
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void batadv_skb_set_priority(struct sk_buff *skb, int offset) |
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{ |
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struct iphdr ip_hdr_tmp, *ip_hdr; |
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struct ipv6hdr ip6_hdr_tmp, *ip6_hdr; |
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struct ethhdr ethhdr_tmp, *ethhdr; |
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struct vlan_ethhdr *vhdr, vhdr_tmp; |
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u32 prio; |
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/* already set, do nothing */ |
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if (skb->priority >= 256 && skb->priority <= 263) |
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return; |
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ethhdr = skb_header_pointer(skb, offset, sizeof(*ethhdr), ðhdr_tmp); |
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if (!ethhdr) |
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return; |
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switch (ethhdr->h_proto) { |
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case htons(ETH_P_8021Q): |
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vhdr = skb_header_pointer(skb, offset + sizeof(*vhdr), |
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sizeof(*vhdr), &vhdr_tmp); |
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if (!vhdr) |
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return; |
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prio = ntohs(vhdr->h_vlan_TCI) & VLAN_PRIO_MASK; |
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prio = prio >> VLAN_PRIO_SHIFT; |
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break; |
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case htons(ETH_P_IP): |
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ip_hdr = skb_header_pointer(skb, offset + sizeof(*ethhdr), |
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sizeof(*ip_hdr), &ip_hdr_tmp); |
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if (!ip_hdr) |
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return; |
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prio = (ipv4_get_dsfield(ip_hdr) & 0xfc) >> 5; |
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break; |
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case htons(ETH_P_IPV6): |
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ip6_hdr = skb_header_pointer(skb, offset + sizeof(*ethhdr), |
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sizeof(*ip6_hdr), &ip6_hdr_tmp); |
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if (!ip6_hdr) |
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return; |
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prio = (ipv6_get_dsfield(ip6_hdr) & 0xfc) >> 5; |
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break; |
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default: |
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return; |
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} |
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skb->priority = prio + 256; |
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} |
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static int batadv_recv_unhandled_packet(struct sk_buff *skb, |
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struct batadv_hard_iface *recv_if) |
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{ |
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kfree_skb(skb); |
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return NET_RX_DROP; |
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} |
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/* incoming packets with the batman ethertype received on any active hard |
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* interface |
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*/ |
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/** |
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* batadv_batman_skb_recv() - Handle incoming message from an hard interface |
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* @skb: the received packet |
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* @dev: the net device that the packet was received on |
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* @ptype: packet type of incoming packet (ETH_P_BATMAN) |
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* @orig_dev: the original receive net device (e.g. bonded device) |
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* |
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* Return: NET_RX_SUCCESS on success or NET_RX_DROP in case of failure |
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*/ |
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int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
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struct packet_type *ptype, |
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struct net_device *orig_dev) |
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{ |
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struct batadv_priv *bat_priv; |
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struct batadv_ogm_packet *batadv_ogm_packet; |
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struct batadv_hard_iface *hard_iface; |
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u8 idx; |
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hard_iface = container_of(ptype, struct batadv_hard_iface, |
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batman_adv_ptype); |
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/* Prevent processing a packet received on an interface which is getting |
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* shut down otherwise the packet may trigger de-reference errors |
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* further down in the receive path. |
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*/ |
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if (!kref_get_unless_zero(&hard_iface->refcount)) |
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goto err_out; |
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skb = skb_share_check(skb, GFP_ATOMIC); |
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/* skb was released by skb_share_check() */ |
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if (!skb) |
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goto err_put; |
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/* packet should hold at least type and version */ |
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if (unlikely(!pskb_may_pull(skb, 2))) |
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goto err_free; |
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/* expect a valid ethernet header here. */ |
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if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb))) |
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goto err_free; |
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if (!hard_iface->soft_iface) |
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goto err_free; |
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bat_priv = netdev_priv(hard_iface->soft_iface); |
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if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
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goto err_free; |
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/* discard frames on not active interfaces */ |
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if (hard_iface->if_status != BATADV_IF_ACTIVE) |
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goto err_free; |
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batadv_ogm_packet = (struct batadv_ogm_packet *)skb->data; |
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if (batadv_ogm_packet->version != BATADV_COMPAT_VERSION) { |
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
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"Drop packet: incompatible batman version (%i)\n", |
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batadv_ogm_packet->version); |
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goto err_free; |
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} |
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/* reset control block to avoid left overs from previous users */ |
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memset(skb->cb, 0, sizeof(struct batadv_skb_cb)); |
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idx = batadv_ogm_packet->packet_type; |
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(*batadv_rx_handler[idx])(skb, hard_iface); |
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batadv_hardif_put(hard_iface); |
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/* return NET_RX_SUCCESS in any case as we |
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* most probably dropped the packet for |
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* routing-logical reasons. |
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*/ |
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return NET_RX_SUCCESS; |
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err_free: |
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kfree_skb(skb); |
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err_put: |
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batadv_hardif_put(hard_iface); |
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err_out: |
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return NET_RX_DROP; |
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} |
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static void batadv_recv_handler_init(void) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(batadv_rx_handler); i++) |
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batadv_rx_handler[i] = batadv_recv_unhandled_packet; |
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for (i = BATADV_UNICAST_MIN; i <= BATADV_UNICAST_MAX; i++) |
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batadv_rx_handler[i] = batadv_recv_unhandled_unicast_packet; |
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/* compile time checks for sizes */ |
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BUILD_BUG_ON(sizeof(struct batadv_bla_claim_dst) != 6); |
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BUILD_BUG_ON(sizeof(struct batadv_ogm_packet) != 24); |
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BUILD_BUG_ON(sizeof(struct batadv_icmp_header) != 20); |
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BUILD_BUG_ON(sizeof(struct batadv_icmp_packet) != 20); |
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BUILD_BUG_ON(sizeof(struct batadv_icmp_packet_rr) != 116); |
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BUILD_BUG_ON(sizeof(struct batadv_unicast_packet) != 10); |
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BUILD_BUG_ON(sizeof(struct batadv_unicast_4addr_packet) != 18); |
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BUILD_BUG_ON(sizeof(struct batadv_frag_packet) != 20); |
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BUILD_BUG_ON(sizeof(struct batadv_bcast_packet) != 14); |
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BUILD_BUG_ON(sizeof(struct batadv_coded_packet) != 46); |
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BUILD_BUG_ON(sizeof(struct batadv_unicast_tvlv_packet) != 20); |
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BUILD_BUG_ON(sizeof(struct batadv_tvlv_hdr) != 4); |
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BUILD_BUG_ON(sizeof(struct batadv_tvlv_gateway_data) != 8); |
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BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_vlan_data) != 8); |
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BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_change) != 12); |
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BUILD_BUG_ON(sizeof(struct batadv_tvlv_roam_adv) != 8); |
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i = sizeof_field(struct sk_buff, cb); |
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BUILD_BUG_ON(sizeof(struct batadv_skb_cb) > i); |
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/* broadcast packet */ |
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batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; |
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/* unicast packets ... */ |
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/* unicast with 4 addresses packet */ |
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batadv_rx_handler[BATADV_UNICAST_4ADDR] = batadv_recv_unicast_packet; |
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/* unicast packet */ |
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batadv_rx_handler[BATADV_UNICAST] = batadv_recv_unicast_packet; |
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/* unicast tvlv packet */ |
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batadv_rx_handler[BATADV_UNICAST_TVLV] = batadv_recv_unicast_tvlv; |
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/* batman icmp packet */ |
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batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet; |
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/* Fragmented packets */ |
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batadv_rx_handler[BATADV_UNICAST_FRAG] = batadv_recv_frag_packet; |
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} |
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/** |
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* batadv_recv_handler_register() - Register handler for batman-adv packet type |
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* @packet_type: batadv_packettype which should be handled |
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* @recv_handler: receive handler for the packet type |
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* |
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* Return: 0 on success or negative error number in case of failure |
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*/ |
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int |
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batadv_recv_handler_register(u8 packet_type, |
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int (*recv_handler)(struct sk_buff *, |
|
struct batadv_hard_iface *)) |
|
{ |
|
int (*curr)(struct sk_buff *skb, |
|
struct batadv_hard_iface *recv_if); |
|
curr = batadv_rx_handler[packet_type]; |
|
|
|
if (curr != batadv_recv_unhandled_packet && |
|
curr != batadv_recv_unhandled_unicast_packet) |
|
return -EBUSY; |
|
|
|
batadv_rx_handler[packet_type] = recv_handler; |
|
return 0; |
|
} |
|
|
|
/** |
|
* batadv_recv_handler_unregister() - Unregister handler for packet type |
|
* @packet_type: batadv_packettype which should no longer be handled |
|
*/ |
|
void batadv_recv_handler_unregister(u8 packet_type) |
|
{ |
|
batadv_rx_handler[packet_type] = batadv_recv_unhandled_packet; |
|
} |
|
|
|
/** |
|
* batadv_skb_crc32() - calculate CRC32 of the whole packet and skip bytes in |
|
* the header |
|
* @skb: skb pointing to fragmented socket buffers |
|
* @payload_ptr: Pointer to position inside the head buffer of the skb |
|
* marking the start of the data to be CRC'ed |
|
* |
|
* payload_ptr must always point to an address in the skb head buffer and not to |
|
* a fragment. |
|
* |
|
* Return: big endian crc32c of the checksummed data |
|
*/ |
|
__be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr) |
|
{ |
|
u32 crc = 0; |
|
unsigned int from; |
|
unsigned int to = skb->len; |
|
struct skb_seq_state st; |
|
const u8 *data; |
|
unsigned int len; |
|
unsigned int consumed = 0; |
|
|
|
from = (unsigned int)(payload_ptr - skb->data); |
|
|
|
skb_prepare_seq_read(skb, from, to, &st); |
|
while ((len = skb_seq_read(consumed, &data, &st)) != 0) { |
|
crc = crc32c(crc, data, len); |
|
consumed += len; |
|
} |
|
|
|
return htonl(crc); |
|
} |
|
|
|
/** |
|
* batadv_get_vid() - extract the VLAN identifier from skb if any |
|
* @skb: the buffer containing the packet |
|
* @header_len: length of the batman header preceding the ethernet header |
|
* |
|
* Return: VID with the BATADV_VLAN_HAS_TAG flag when the packet embedded in the |
|
* skb is vlan tagged. Otherwise BATADV_NO_FLAGS. |
|
*/ |
|
unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len) |
|
{ |
|
struct ethhdr *ethhdr = (struct ethhdr *)(skb->data + header_len); |
|
struct vlan_ethhdr *vhdr; |
|
unsigned short vid; |
|
|
|
if (ethhdr->h_proto != htons(ETH_P_8021Q)) |
|
return BATADV_NO_FLAGS; |
|
|
|
if (!pskb_may_pull(skb, header_len + VLAN_ETH_HLEN)) |
|
return BATADV_NO_FLAGS; |
|
|
|
vhdr = (struct vlan_ethhdr *)(skb->data + header_len); |
|
vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; |
|
vid |= BATADV_VLAN_HAS_TAG; |
|
|
|
return vid; |
|
} |
|
|
|
/** |
|
* batadv_vlan_ap_isola_get() - return AP isolation status for the given vlan |
|
* @bat_priv: the bat priv with all the soft interface information |
|
* @vid: the VLAN identifier for which the AP isolation attributed as to be |
|
* looked up |
|
* |
|
* Return: true if AP isolation is on for the VLAN identified by vid, false |
|
* otherwise |
|
*/ |
|
bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid) |
|
{ |
|
bool ap_isolation_enabled = false; |
|
struct batadv_softif_vlan *vlan; |
|
|
|
/* if the AP isolation is requested on a VLAN, then check for its |
|
* setting in the proper VLAN private data structure |
|
*/ |
|
vlan = batadv_softif_vlan_get(bat_priv, vid); |
|
if (vlan) { |
|
ap_isolation_enabled = atomic_read(&vlan->ap_isolation); |
|
batadv_softif_vlan_put(vlan); |
|
} |
|
|
|
return ap_isolation_enabled; |
|
} |
|
|
|
/** |
|
* batadv_throw_uevent() - Send an uevent with batman-adv specific env data |
|
* @bat_priv: the bat priv with all the soft interface information |
|
* @type: subsystem type of event. Stored in uevent's BATTYPE |
|
* @action: action type of event. Stored in uevent's BATACTION |
|
* @data: string with additional information to the event (ignored for |
|
* BATADV_UEV_DEL). Stored in uevent's BATDATA |
|
* |
|
* Return: 0 on success or negative error number in case of failure |
|
*/ |
|
int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type, |
|
enum batadv_uev_action action, const char *data) |
|
{ |
|
int ret = -ENOMEM; |
|
struct kobject *bat_kobj; |
|
char *uevent_env[4] = { NULL, NULL, NULL, NULL }; |
|
|
|
bat_kobj = &bat_priv->soft_iface->dev.kobj; |
|
|
|
uevent_env[0] = kasprintf(GFP_ATOMIC, |
|
"%s%s", BATADV_UEV_TYPE_VAR, |
|
batadv_uev_type_str[type]); |
|
if (!uevent_env[0]) |
|
goto out; |
|
|
|
uevent_env[1] = kasprintf(GFP_ATOMIC, |
|
"%s%s", BATADV_UEV_ACTION_VAR, |
|
batadv_uev_action_str[action]); |
|
if (!uevent_env[1]) |
|
goto out; |
|
|
|
/* If the event is DEL, ignore the data field */ |
|
if (action != BATADV_UEV_DEL) { |
|
uevent_env[2] = kasprintf(GFP_ATOMIC, |
|
"%s%s", BATADV_UEV_DATA_VAR, data); |
|
if (!uevent_env[2]) |
|
goto out; |
|
} |
|
|
|
ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env); |
|
out: |
|
kfree(uevent_env[0]); |
|
kfree(uevent_env[1]); |
|
kfree(uevent_env[2]); |
|
|
|
if (ret) |
|
batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
|
"Impossible to send uevent for (%s,%s,%s) event (err: %d)\n", |
|
batadv_uev_type_str[type], |
|
batadv_uev_action_str[action], |
|
(action == BATADV_UEV_DEL ? "NULL" : data), ret); |
|
return ret; |
|
} |
|
|
|
module_init(batadv_init); |
|
module_exit(batadv_exit); |
|
|
|
MODULE_LICENSE("GPL"); |
|
|
|
MODULE_AUTHOR(BATADV_DRIVER_AUTHOR); |
|
MODULE_DESCRIPTION(BATADV_DRIVER_DESC); |
|
MODULE_VERSION(BATADV_SOURCE_VERSION); |
|
MODULE_ALIAS_RTNL_LINK("batadv"); |
|
MODULE_ALIAS_GENL_FAMILY(BATADV_NL_NAME);
|
|
|