2008-02-23 15:17:13 +01:00
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/*
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* Copyright (c) 2008 open80211s Ltd.
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* Author: Luis Carlos Cobo <luisca@cozybit.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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2008-02-23 15:17:19 +01:00
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#include <linux/kernel.h>
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#include <linux/random.h>
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2008-02-23 15:17:13 +01:00
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#include "ieee80211_i.h"
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2008-04-08 21:14:40 +02:00
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#include "rate.h"
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2008-02-23 15:17:13 +01:00
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#include "mesh.h"
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#ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
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#define mpl_dbg(fmt, args...) printk(KERN_DEBUG fmt, ##args)
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#else
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#define mpl_dbg(fmt, args...) do { (void)(0); } while (0)
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#endif
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#define PLINK_GET_FRAME_SUBTYPE(p) (p)
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#define PLINK_GET_LLID(p) (p + 1)
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#define PLINK_GET_PLID(p) (p + 3)
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#define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
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jiffies + HZ * t / 1000))
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/* Peer link cancel reasons, all subject to ANA approval */
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#define MESH_LINK_CANCELLED 2
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#define MESH_MAX_NEIGHBORS 3
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#define MESH_CAPABILITY_POLICY_VIOLATION 4
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#define MESH_CLOSE_RCVD 5
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#define MESH_MAX_RETRIES 6
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#define MESH_CONFIRM_TIMEOUT 7
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#define MESH_SECURITY_ROLE_NEGOTIATION_DIFFERS 8
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#define MESH_SECURITY_AUTHENTICATION_IMPOSSIBLE 9
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#define MESH_SECURITY_FAILED_VERIFICATION 10
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2008-09-11 00:01:49 +02:00
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#define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries)
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#define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout)
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#define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout)
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#define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout)
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#define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks)
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2008-02-23 15:17:13 +01:00
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enum plink_frame_type {
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PLINK_OPEN = 0,
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PLINK_CONFIRM,
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PLINK_CLOSE
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};
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enum plink_event {
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PLINK_UNDEFINED,
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OPN_ACPT,
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OPN_RJCT,
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OPN_IGNR,
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CNF_ACPT,
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CNF_RJCT,
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CNF_IGNR,
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CLS_ACPT,
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CLS_IGNR
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};
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static inline
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void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
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{
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2008-09-11 00:01:49 +02:00
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atomic_inc(&sdata->u.mesh.mshstats.estab_plinks);
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2008-02-25 16:27:46 +01:00
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mesh_accept_plinks_update(sdata);
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2009-11-10 00:46:41 +01:00
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ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
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2008-02-23 15:17:13 +01:00
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}
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static inline
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void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
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{
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2008-09-11 00:01:49 +02:00
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atomic_dec(&sdata->u.mesh.mshstats.estab_plinks);
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2008-02-25 16:27:46 +01:00
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mesh_accept_plinks_update(sdata);
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2009-11-10 00:46:41 +01:00
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ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
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2008-02-23 15:17:13 +01:00
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}
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/**
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* mesh_plink_fsm_restart - restart a mesh peer link finite state machine
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*
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2009-11-10 00:46:42 +01:00
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* @sta: mesh peer link to restart
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2008-02-23 15:17:13 +01:00
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*
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2008-05-03 01:02:02 +02:00
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* Locking: this function must be called holding sta->lock
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2008-02-23 15:17:13 +01:00
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*/
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static inline void mesh_plink_fsm_restart(struct sta_info *sta)
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{
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2008-03-01 00:46:08 +01:00
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sta->plink_state = PLINK_LISTEN;
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2008-02-29 21:13:38 +01:00
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sta->llid = sta->plid = sta->reason = 0;
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sta->plink_retries = 0;
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2008-02-23 15:17:13 +01:00
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}
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2008-04-01 15:21:00 +02:00
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/*
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* NOTE: This is just an alias for sta_info_alloc(), see notes
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* on it in the lifecycle management section!
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*/
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2008-02-27 09:56:40 +01:00
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static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
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2009-01-21 15:13:48 +01:00
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u8 *hw_addr, u32 rates)
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2008-02-23 15:17:13 +01:00
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{
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2008-02-25 16:27:46 +01:00
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struct ieee80211_local *local = sdata->local;
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2008-02-23 15:17:13 +01:00
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struct sta_info *sta;
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if (local->num_sta >= MESH_MAX_PLINKS)
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2008-02-25 16:27:47 +01:00
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return NULL;
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2008-02-23 15:17:13 +01:00
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2008-02-27 09:56:40 +01:00
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sta = sta_info_alloc(sdata, hw_addr, GFP_ATOMIC);
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2008-02-25 16:27:47 +01:00
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if (!sta)
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return NULL;
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2008-02-23 15:17:13 +01:00
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2008-05-03 01:02:02 +02:00
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sta->flags = WLAN_STA_AUTHORIZED;
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2008-09-11 02:45:11 +02:00
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sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
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2008-12-27 22:19:49 +01:00
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rate_control_rate_init(sta);
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2008-02-23 15:17:13 +01:00
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return sta;
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}
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/**
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2008-02-25 21:36:27 +01:00
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* mesh_plink_deactivate - deactivate mesh peer link
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2008-02-23 15:17:13 +01:00
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*
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* @sta: mesh peer link to deactivate
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*
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* All mesh paths with this peer as next hop will be flushed
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*
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2008-05-03 01:02:02 +02:00
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* Locking: the caller must hold sta->lock
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2008-02-23 15:17:13 +01:00
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*/
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2008-02-23 15:17:19 +01:00
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static void __mesh_plink_deactivate(struct sta_info *sta)
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2008-02-23 15:17:13 +01:00
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{
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2008-02-25 16:27:46 +01:00
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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2008-03-01 00:46:08 +01:00
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if (sta->plink_state == PLINK_ESTAB)
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2008-02-23 15:17:13 +01:00
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mesh_plink_dec_estab_count(sdata);
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2008-03-01 00:46:08 +01:00
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sta->plink_state = PLINK_BLOCKED;
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2008-02-23 15:17:13 +01:00
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mesh_path_flush_by_nexthop(sta);
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}
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2008-02-23 15:17:19 +01:00
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/**
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* __mesh_plink_deactivate - deactivate mesh peer link
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*
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* @sta: mesh peer link to deactivate
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*
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* All mesh paths with this peer as next hop will be flushed
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*/
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void mesh_plink_deactivate(struct sta_info *sta)
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{
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2008-05-03 01:02:02 +02:00
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spin_lock_bh(&sta->lock);
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2008-02-23 15:17:19 +01:00
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__mesh_plink_deactivate(sta);
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2008-05-03 01:02:02 +02:00
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spin_unlock_bh(&sta->lock);
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2008-02-23 15:17:19 +01:00
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}
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2008-08-03 02:04:37 +02:00
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static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
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2008-02-23 15:17:13 +01:00
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enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid,
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__le16 reason) {
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2008-08-03 02:04:37 +02:00
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struct ieee80211_local *local = sdata->local;
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2008-02-23 15:17:13 +01:00
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struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
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struct ieee80211_mgmt *mgmt;
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bool include_plid = false;
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u8 *pos;
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int ie_len;
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if (!skb)
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return -1;
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skb_reserve(skb, local->hw.extra_tx_headroom);
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/* 25 is the size of the common mgmt part (24) plus the size of the
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* common action part (1)
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*/
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mgmt = (struct ieee80211_mgmt *)
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skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action));
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memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action));
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2008-07-16 03:44:13 +02:00
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_ACTION);
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2008-02-23 15:17:13 +01:00
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memcpy(mgmt->da, da, ETH_ALEN);
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2008-08-03 02:04:37 +02:00
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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2008-02-23 15:17:13 +01:00
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/* BSSID is left zeroed, wildcard value */
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mgmt->u.action.category = PLINK_CATEGORY;
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mgmt->u.action.u.plink_action.action_code = action;
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if (action == PLINK_CLOSE)
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mgmt->u.action.u.plink_action.aux = reason;
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else {
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mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0);
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if (action == PLINK_CONFIRM) {
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pos = skb_put(skb, 4);
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/* two-byte status code followed by two-byte AID */
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memset(pos, 0, 4);
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}
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2008-08-03 02:04:37 +02:00
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mesh_mgmt_ies_add(skb, sdata);
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2008-02-23 15:17:13 +01:00
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}
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/* Add Peer Link Management element */
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switch (action) {
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case PLINK_OPEN:
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ie_len = 3;
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break;
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case PLINK_CONFIRM:
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ie_len = 5;
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include_plid = true;
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break;
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case PLINK_CLOSE:
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default:
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if (!plid)
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ie_len = 5;
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else {
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ie_len = 7;
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include_plid = true;
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}
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break;
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}
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pos = skb_put(skb, 2 + ie_len);
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*pos++ = WLAN_EID_PEER_LINK;
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*pos++ = ie_len;
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*pos++ = action;
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memcpy(pos, &llid, 2);
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if (include_plid) {
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pos += 2;
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memcpy(pos, &plid, 2);
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}
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if (action == PLINK_CLOSE) {
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pos += 2;
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memcpy(pos, &reason, 2);
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}
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2009-01-08 12:32:07 +01:00
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ieee80211_tx_skb(sdata, skb, 1);
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2008-02-23 15:17:13 +01:00
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return 0;
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}
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2009-01-21 15:13:48 +01:00
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void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata,
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2008-02-23 15:17:13 +01:00
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bool peer_accepting_plinks)
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{
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2008-08-03 02:04:37 +02:00
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struct ieee80211_local *local = sdata->local;
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2008-02-23 15:17:13 +01:00
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struct sta_info *sta;
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2008-02-25 16:27:46 +01:00
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rcu_read_lock();
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2008-02-23 15:17:13 +01:00
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sta = sta_info_get(local, hw_addr);
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if (!sta) {
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2008-02-27 09:56:40 +01:00
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sta = mesh_plink_alloc(sdata, hw_addr, rates);
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2008-02-25 16:27:47 +01:00
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if (!sta) {
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rcu_read_unlock();
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return;
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}
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if (sta_info_insert(sta)) {
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2008-02-25 16:27:46 +01:00
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rcu_read_unlock();
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2008-02-23 15:17:13 +01:00
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return;
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2008-02-25 16:27:46 +01:00
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}
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2008-02-23 15:17:13 +01:00
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}
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sta->last_rx = jiffies;
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2008-09-11 02:45:11 +02:00
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sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
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2008-03-01 00:46:08 +01:00
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if (peer_accepting_plinks && sta->plink_state == PLINK_LISTEN &&
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2008-09-11 00:01:49 +02:00
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sdata->u.mesh.accepting_plinks &&
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sdata->u.mesh.mshcfg.auto_open_plinks)
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2008-02-23 15:17:13 +01:00
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mesh_plink_open(sta);
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2008-02-25 16:27:46 +01:00
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rcu_read_unlock();
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2008-02-23 15:17:13 +01:00
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}
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static void mesh_plink_timer(unsigned long data)
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{
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struct sta_info *sta;
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__le16 llid, plid, reason;
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struct ieee80211_sub_if_data *sdata;
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2008-02-25 16:27:46 +01:00
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/*
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* This STA is valid because sta_info_destroy() will
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* del_timer_sync() this timer after having made sure
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* it cannot be readded (by deleting the plink.)
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*/
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2008-02-23 15:17:13 +01:00
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sta = (struct sta_info *) data;
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2009-05-17 11:40:42 +02:00
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if (sta->sdata->local->quiescing) {
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sta->plink_timer_was_running = true;
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return;
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}
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2008-05-03 01:02:02 +02:00
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spin_lock_bh(&sta->lock);
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2008-02-23 15:17:13 +01:00
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if (sta->ignore_plink_timer) {
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sta->ignore_plink_timer = false;
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2008-05-03 01:02:02 +02:00
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spin_unlock_bh(&sta->lock);
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2008-02-23 15:17:13 +01:00
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return;
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}
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2008-10-27 23:56:10 +01:00
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mpl_dbg("Mesh plink timer for %pM fired on state %d\n",
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sta->sta.addr, sta->plink_state);
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2008-02-23 15:17:13 +01:00
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reason = 0;
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llid = sta->llid;
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plid = sta->plid;
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2008-02-25 16:27:46 +01:00
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sdata = sta->sdata;
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2008-02-23 15:17:13 +01:00
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switch (sta->plink_state) {
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2008-03-01 00:46:08 +01:00
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case PLINK_OPN_RCVD:
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case PLINK_OPN_SNT:
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2008-02-23 15:17:13 +01:00
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/* retry timer */
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if (sta->plink_retries < dot11MeshMaxRetries(sdata)) {
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u32 rand;
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2008-10-27 23:56:10 +01:00
|
|
|
mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n",
|
|
|
|
sta->sta.addr, sta->plink_retries,
|
|
|
|
sta->plink_timeout);
|
2008-02-23 15:17:13 +01:00
|
|
|
get_random_bytes(&rand, sizeof(u32));
|
|
|
|
sta->plink_timeout = sta->plink_timeout +
|
|
|
|
rand % sta->plink_timeout;
|
|
|
|
++sta->plink_retries;
|
2008-02-25 16:27:46 +01:00
|
|
|
mod_plink_timer(sta, sta->plink_timeout);
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
0, 0);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
reason = cpu_to_le16(MESH_MAX_RETRIES);
|
|
|
|
/* fall through on else */
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_CNF_RCVD:
|
2008-02-23 15:17:13 +01:00
|
|
|
/* confirm timer */
|
|
|
|
if (!reason)
|
|
|
|
reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT);
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_HOLDING;
|
2008-02-25 16:27:46 +01:00
|
|
|
mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid,
|
2008-02-23 15:17:13 +01:00
|
|
|
reason);
|
|
|
|
break;
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_HOLDING:
|
2008-02-23 15:17:13 +01:00
|
|
|
/* holding timer */
|
2008-02-25 16:27:46 +01:00
|
|
|
del_timer(&sta->plink_timer);
|
2008-02-23 15:17:13 +01:00
|
|
|
mesh_plink_fsm_restart(sta);
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
default:
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-05-17 11:40:42 +02:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
void mesh_plink_quiesce(struct sta_info *sta)
|
|
|
|
{
|
|
|
|
if (del_timer_sync(&sta->plink_timer))
|
|
|
|
sta->plink_timer_was_running = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void mesh_plink_restart(struct sta_info *sta)
|
|
|
|
{
|
|
|
|
if (sta->plink_timer_was_running) {
|
|
|
|
add_timer(&sta->plink_timer);
|
|
|
|
sta->plink_timer_was_running = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2008-02-23 15:17:13 +01:00
|
|
|
static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
|
|
|
|
{
|
|
|
|
sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
|
|
|
|
sta->plink_timer.data = (unsigned long) sta;
|
|
|
|
sta->plink_timer.function = mesh_plink_timer;
|
|
|
|
sta->plink_timeout = timeout;
|
|
|
|
add_timer(&sta->plink_timer);
|
|
|
|
}
|
|
|
|
|
|
|
|
int mesh_plink_open(struct sta_info *sta)
|
|
|
|
{
|
|
|
|
__le16 llid;
|
2008-02-25 16:27:46 +01:00
|
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
2008-02-23 15:17:13 +01:00
|
|
|
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_lock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
get_random_bytes(&llid, 2);
|
|
|
|
sta->llid = llid;
|
2008-03-01 00:46:08 +01:00
|
|
|
if (sta->plink_state != PLINK_LISTEN) {
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_OPN_SNT;
|
2008-02-23 15:17:13 +01:00
|
|
|
mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-10-27 23:56:10 +01:00
|
|
|
mpl_dbg("Mesh plink: starting establishment with %pM\n",
|
|
|
|
sta->sta.addr);
|
2008-02-23 15:17:13 +01:00
|
|
|
|
2008-08-03 02:04:37 +02:00
|
|
|
return mesh_plink_frame_tx(sdata, PLINK_OPEN,
|
2008-09-11 00:02:02 +02:00
|
|
|
sta->sta.addr, llid, 0, 0);
|
2008-02-23 15:17:13 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
void mesh_plink_block(struct sta_info *sta)
|
|
|
|
{
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_lock_bh(&sta->lock);
|
2008-02-23 15:17:19 +01:00
|
|
|
__mesh_plink_deactivate(sta);
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_BLOCKED;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-08-03 02:04:37 +02:00
|
|
|
void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt,
|
2008-02-23 15:17:13 +01:00
|
|
|
size_t len, struct ieee80211_rx_status *rx_status)
|
|
|
|
{
|
2008-02-25 16:27:46 +01:00
|
|
|
struct ieee80211_local *local = sdata->local;
|
2008-02-23 15:17:13 +01:00
|
|
|
struct ieee802_11_elems elems;
|
|
|
|
struct sta_info *sta;
|
|
|
|
enum plink_event event;
|
|
|
|
enum plink_frame_type ftype;
|
|
|
|
size_t baselen;
|
|
|
|
u8 ie_len;
|
|
|
|
u8 *baseaddr;
|
|
|
|
__le16 plid, llid, reason;
|
|
|
|
|
2008-09-08 15:41:59 +02:00
|
|
|
/* need action_code, aux */
|
|
|
|
if (len < IEEE80211_MIN_ACTION_SIZE + 3)
|
|
|
|
return;
|
|
|
|
|
2008-02-23 15:17:13 +01:00
|
|
|
if (is_multicast_ether_addr(mgmt->da)) {
|
|
|
|
mpl_dbg("Mesh plink: ignore frame from multicast address");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
baseaddr = mgmt->u.action.u.plink_action.variable;
|
|
|
|
baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt;
|
|
|
|
if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) {
|
|
|
|
baseaddr += 4;
|
2009-08-12 20:03:44 +02:00
|
|
|
baselen += 4;
|
2008-02-23 15:17:13 +01:00
|
|
|
}
|
|
|
|
ieee802_11_parse_elems(baseaddr, len - baselen, &elems);
|
|
|
|
if (!elems.peer_link) {
|
|
|
|
mpl_dbg("Mesh plink: missing necessary peer link ie\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
ftype = *((u8 *)PLINK_GET_FRAME_SUBTYPE(elems.peer_link));
|
|
|
|
ie_len = elems.peer_link_len;
|
|
|
|
if ((ftype == PLINK_OPEN && ie_len != 3) ||
|
|
|
|
(ftype == PLINK_CONFIRM && ie_len != 5) ||
|
|
|
|
(ftype == PLINK_CLOSE && ie_len != 5 && ie_len != 7)) {
|
|
|
|
mpl_dbg("Mesh plink: incorrect plink ie length\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) {
|
|
|
|
mpl_dbg("Mesh plink: missing necessary ie\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/* Note the lines below are correct, the llid in the frame is the plid
|
|
|
|
* from the point of view of this host.
|
|
|
|
*/
|
|
|
|
memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2);
|
|
|
|
if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 7))
|
|
|
|
memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2);
|
|
|
|
|
2008-02-25 16:27:46 +01:00
|
|
|
rcu_read_lock();
|
|
|
|
|
2008-02-23 15:17:13 +01:00
|
|
|
sta = sta_info_get(local, mgmt->sa);
|
|
|
|
if (!sta && ftype != PLINK_OPEN) {
|
|
|
|
mpl_dbg("Mesh plink: cls or cnf from unknown peer\n");
|
2008-02-25 16:27:46 +01:00
|
|
|
rcu_read_unlock();
|
2008-02-23 15:17:13 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2008-03-01 00:46:08 +01:00
|
|
|
if (sta && sta->plink_state == PLINK_BLOCKED) {
|
2008-02-25 16:27:46 +01:00
|
|
|
rcu_read_unlock();
|
2008-02-23 15:17:13 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now we will figure out the appropriate event... */
|
|
|
|
event = PLINK_UNDEFINED;
|
2008-08-03 02:04:37 +02:00
|
|
|
if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) {
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (ftype) {
|
|
|
|
case PLINK_OPEN:
|
|
|
|
event = OPN_RJCT;
|
|
|
|
break;
|
|
|
|
case PLINK_CONFIRM:
|
|
|
|
event = CNF_RJCT;
|
|
|
|
break;
|
|
|
|
case PLINK_CLOSE:
|
|
|
|
/* avoid warning */
|
|
|
|
break;
|
|
|
|
}
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_lock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
} else if (!sta) {
|
|
|
|
/* ftype == PLINK_OPEN */
|
2009-01-21 15:13:48 +01:00
|
|
|
u32 rates;
|
2008-02-23 15:17:13 +01:00
|
|
|
if (!mesh_plink_free_count(sdata)) {
|
|
|
|
mpl_dbg("Mesh plink error: no more free plinks\n");
|
2008-02-25 16:27:46 +01:00
|
|
|
rcu_read_unlock();
|
2008-02-23 15:17:13 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
rates = ieee80211_sta_get_rates(local, &elems, rx_status->band);
|
2008-02-27 09:56:40 +01:00
|
|
|
sta = mesh_plink_alloc(sdata, mgmt->sa, rates);
|
2008-02-25 16:27:47 +01:00
|
|
|
if (!sta) {
|
2008-02-23 15:17:13 +01:00
|
|
|
mpl_dbg("Mesh plink error: plink table full\n");
|
2008-02-25 16:27:46 +01:00
|
|
|
rcu_read_unlock();
|
2008-02-23 15:17:13 +01:00
|
|
|
return;
|
|
|
|
}
|
2008-02-25 16:27:47 +01:00
|
|
|
if (sta_info_insert(sta)) {
|
|
|
|
rcu_read_unlock();
|
|
|
|
return;
|
|
|
|
}
|
2008-02-23 15:17:13 +01:00
|
|
|
event = OPN_ACPT;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_lock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
} else {
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_lock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (ftype) {
|
|
|
|
case PLINK_OPEN:
|
|
|
|
if (!mesh_plink_free_count(sdata) ||
|
2008-02-25 16:27:46 +01:00
|
|
|
(sta->plid && sta->plid != plid))
|
2008-02-23 15:17:13 +01:00
|
|
|
event = OPN_IGNR;
|
|
|
|
else
|
|
|
|
event = OPN_ACPT;
|
|
|
|
break;
|
|
|
|
case PLINK_CONFIRM:
|
|
|
|
if (!mesh_plink_free_count(sdata) ||
|
2008-02-25 16:27:46 +01:00
|
|
|
(sta->llid != llid || sta->plid != plid))
|
2008-02-23 15:17:13 +01:00
|
|
|
event = CNF_IGNR;
|
|
|
|
else
|
|
|
|
event = CNF_ACPT;
|
|
|
|
break;
|
|
|
|
case PLINK_CLOSE:
|
2008-03-01 00:46:08 +01:00
|
|
|
if (sta->plink_state == PLINK_ESTAB)
|
2008-02-23 15:17:13 +01:00
|
|
|
/* Do not check for llid or plid. This does not
|
|
|
|
* follow the standard but since multiple plinks
|
|
|
|
* per sta are not supported, it is necessary in
|
|
|
|
* order to avoid a livelock when MP A sees an
|
|
|
|
* establish peer link to MP B but MP B does not
|
|
|
|
* see it. This can be caused by a timeout in
|
|
|
|
* B's peer link establishment or B beign
|
|
|
|
* restarted.
|
|
|
|
*/
|
|
|
|
event = CLS_ACPT;
|
|
|
|
else if (sta->plid != plid)
|
|
|
|
event = CLS_IGNR;
|
|
|
|
else if (ie_len == 7 && sta->llid != llid)
|
|
|
|
event = CLS_IGNR;
|
|
|
|
else
|
|
|
|
event = CLS_ACPT;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
mpl_dbg("Mesh plink: unknown frame subtype\n");
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-25 16:27:46 +01:00
|
|
|
rcu_read_unlock();
|
2008-02-23 15:17:13 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-10-27 23:56:10 +01:00
|
|
|
mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %d %d %d %d\n",
|
|
|
|
mgmt->sa, sta->plink_state,
|
|
|
|
le16_to_cpu(sta->llid), le16_to_cpu(sta->plid),
|
|
|
|
event);
|
2008-02-23 15:17:13 +01:00
|
|
|
reason = 0;
|
|
|
|
switch (sta->plink_state) {
|
|
|
|
/* spin_unlock as soon as state is updated at each case */
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_LISTEN:
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (event) {
|
|
|
|
case CLS_ACPT:
|
|
|
|
mesh_plink_fsm_restart(sta);
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
case OPN_ACPT:
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_OPN_RCVD;
|
2008-02-23 15:17:13 +01:00
|
|
|
sta->plid = plid;
|
|
|
|
get_random_bytes(&llid, 2);
|
|
|
|
sta->llid = llid;
|
|
|
|
mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
0, 0);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr,
|
2008-02-23 15:17:13 +01:00
|
|
|
llid, plid, 0);
|
|
|
|
break;
|
|
|
|
default:
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_OPN_SNT:
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (event) {
|
|
|
|
case OPN_RJCT:
|
|
|
|
case CNF_RJCT:
|
|
|
|
reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
|
|
|
|
case CLS_ACPT:
|
|
|
|
if (!reason)
|
|
|
|
reason = cpu_to_le16(MESH_CLOSE_RCVD);
|
|
|
|
sta->reason = reason;
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_HOLDING;
|
2008-02-23 15:17:13 +01:00
|
|
|
if (!mod_plink_timer(sta,
|
|
|
|
dot11MeshHoldingTimeout(sdata)))
|
|
|
|
sta->ignore_plink_timer = true;
|
|
|
|
|
|
|
|
llid = sta->llid;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, reason);
|
|
|
|
break;
|
|
|
|
case OPN_ACPT:
|
|
|
|
/* retry timer is left untouched */
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_OPN_RCVD;
|
2008-02-23 15:17:13 +01:00
|
|
|
sta->plid = plid;
|
|
|
|
llid = sta->llid;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, 0);
|
|
|
|
break;
|
|
|
|
case CNF_ACPT:
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_CNF_RCVD;
|
2008-02-23 15:17:13 +01:00
|
|
|
if (!mod_plink_timer(sta,
|
|
|
|
dot11MeshConfirmTimeout(sdata)))
|
|
|
|
sta->ignore_plink_timer = true;
|
|
|
|
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
default:
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_OPN_RCVD:
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (event) {
|
|
|
|
case OPN_RJCT:
|
|
|
|
case CNF_RJCT:
|
|
|
|
reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
|
|
|
|
case CLS_ACPT:
|
|
|
|
if (!reason)
|
|
|
|
reason = cpu_to_le16(MESH_CLOSE_RCVD);
|
|
|
|
sta->reason = reason;
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_HOLDING;
|
2008-02-23 15:17:13 +01:00
|
|
|
if (!mod_plink_timer(sta,
|
|
|
|
dot11MeshHoldingTimeout(sdata)))
|
|
|
|
sta->ignore_plink_timer = true;
|
|
|
|
|
|
|
|
llid = sta->llid;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, reason);
|
|
|
|
break;
|
|
|
|
case OPN_ACPT:
|
|
|
|
llid = sta->llid;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, 0);
|
|
|
|
break;
|
|
|
|
case CNF_ACPT:
|
2008-02-25 16:27:46 +01:00
|
|
|
del_timer(&sta->plink_timer);
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_ESTAB;
|
2008-02-23 15:17:13 +01:00
|
|
|
mesh_plink_inc_estab_count(sdata);
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-10-27 23:56:10 +01:00
|
|
|
mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
|
|
|
|
sta->sta.addr);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
default:
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_CNF_RCVD:
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (event) {
|
|
|
|
case OPN_RJCT:
|
|
|
|
case CNF_RJCT:
|
|
|
|
reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
|
|
|
|
case CLS_ACPT:
|
|
|
|
if (!reason)
|
|
|
|
reason = cpu_to_le16(MESH_CLOSE_RCVD);
|
|
|
|
sta->reason = reason;
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_HOLDING;
|
2008-02-23 15:17:13 +01:00
|
|
|
if (!mod_plink_timer(sta,
|
|
|
|
dot11MeshHoldingTimeout(sdata)))
|
|
|
|
sta->ignore_plink_timer = true;
|
|
|
|
|
|
|
|
llid = sta->llid;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, reason);
|
2008-02-25 10:11:50 +01:00
|
|
|
break;
|
2008-02-23 15:17:13 +01:00
|
|
|
case OPN_ACPT:
|
2008-02-25 16:27:46 +01:00
|
|
|
del_timer(&sta->plink_timer);
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_ESTAB;
|
2008-02-23 15:17:13 +01:00
|
|
|
mesh_plink_inc_estab_count(sdata);
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-10-27 23:56:10 +01:00
|
|
|
mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
|
|
|
|
sta->sta.addr);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, 0);
|
|
|
|
break;
|
|
|
|
default:
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_ESTAB:
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (event) {
|
|
|
|
case CLS_ACPT:
|
|
|
|
reason = cpu_to_le16(MESH_CLOSE_RCVD);
|
|
|
|
sta->reason = reason;
|
2008-02-23 15:17:19 +01:00
|
|
|
__mesh_plink_deactivate(sta);
|
2008-03-01 00:46:08 +01:00
|
|
|
sta->plink_state = PLINK_HOLDING;
|
2008-02-23 15:17:13 +01:00
|
|
|
llid = sta->llid;
|
2008-02-25 16:27:46 +01:00
|
|
|
mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, reason);
|
|
|
|
break;
|
|
|
|
case OPN_ACPT:
|
|
|
|
llid = sta->llid;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
|
2008-02-23 15:17:13 +01:00
|
|
|
plid, 0);
|
|
|
|
break;
|
|
|
|
default:
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
2008-03-01 00:46:08 +01:00
|
|
|
case PLINK_HOLDING:
|
2008-02-23 15:17:13 +01:00
|
|
|
switch (event) {
|
|
|
|
case CLS_ACPT:
|
2008-02-25 16:27:46 +01:00
|
|
|
if (del_timer(&sta->plink_timer))
|
2008-02-23 15:17:13 +01:00
|
|
|
sta->ignore_plink_timer = 1;
|
|
|
|
mesh_plink_fsm_restart(sta);
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
case OPN_ACPT:
|
|
|
|
case CNF_ACPT:
|
|
|
|
case OPN_RJCT:
|
|
|
|
case CNF_RJCT:
|
|
|
|
llid = sta->llid;
|
|
|
|
reason = sta->reason;
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-09-11 00:02:02 +02:00
|
|
|
mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr,
|
|
|
|
llid, plid, reason);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
default:
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
2008-03-01 00:46:08 +01:00
|
|
|
/* should not get here, PLINK_BLOCKED is dealt with at the
|
|
|
|
* beggining of the function
|
2008-02-23 15:17:13 +01:00
|
|
|
*/
|
2008-05-03 01:02:02 +02:00
|
|
|
spin_unlock_bh(&sta->lock);
|
2008-02-23 15:17:13 +01:00
|
|
|
break;
|
|
|
|
}
|
2008-02-25 16:27:46 +01:00
|
|
|
|
|
|
|
rcu_read_unlock();
|
2008-02-23 15:17:13 +01:00
|
|
|
}
|