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![David S. Miller](/assets/img/avatar_default.png)
of small fixes, cleanups and internal features we have: * VHT support for TDLS and IBSS (conditional on drivers though) * first TX performance improvements (the biggest will come later) * many suspend/resume (race) fixes * name_assign_type support from Tom Gundersen -----BEGIN PGP SIGNATURE----- iQIcBAABCAAGBQJVGWlNAAoJEDBSmw7B7bqr5s8P/R9+Q6y4Ixice9dDOJYynl/d dMEUEfCBWUyDaQD1bNQIED2mc0sM5+Ax8OVIVx9fdrLGPxaISBqDJKE1USoTNZzm q+U3dM4Q45SfQSsgaY4FtxTlPWPtUKsNMXY/CxLR+IqVeA3+30rX+hv1f3SAqBj0 68IwW/uUIHb71IZ+hz2Mwudt4JVW8KRg9VlZ0UY6EEvC4m5QD2YkwQQo/hJ2WF+/ wAJbku02L/Vy4J7E6hNcKYWXokht4fVYphjl/1ZDd/+8L8SUv9mC88n1Jzxa428p 1PmbtwzbpOrtTcC2BCPDA04IyfMc7k9DlLKw/h2KLPbHZXheD9eVmo/Am5vz+uH6 926f+FK339SzoJnZ5wBBDiZ8W8TLYNc8ImxtcxjnrtGfr1CKiuh23P1CWyOlKJCO BYFJqkCOqWOHYnN0embaj7JqM/LmQI5ZoBZHZhD2KQXIXpTsjjIMPfJvip5D+tsV +iXIlQwdeK6rbjxdonBgn7n57XIeSVMAYeyDCbzIShfibjHbUZPn+RsZCtv8RWv8 EaZu8PerU5ZDKwdX940+lWrtf/TMDJBYQpAIBRuiZK4DTNWCt3BrDlvb1FXGgA+X vQJnr32vjJ/pLDxNLHQlkKWC4I/CYtG47OgcJN9AQXrig1zApd+C29zy3aqch3ea wxV9dFfheTqZFjtZfSsH =O/cf -----END PGP SIGNATURE----- Merge tag 'mac80211-next-for-davem-2015-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Johannes Berg says: ==================== Lots of updates for net-next; along with the usual flurry of small fixes, cleanups and internal features we have: * VHT support for TDLS and IBSS (conditional on drivers though) * first TX performance improvements (the biggest will come later) * many suspend/resume (race) fixes * name_assign_type support from Tom Gundersen ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
1344 lines
37 KiB
C
1344 lines
37 KiB
C
/*
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* Copyright (c) 2008, 2009 open80211s Ltd.
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* Authors: Luis Carlos Cobo <luisca@cozybit.com>
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* Javier Cardona <javier@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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#include <linux/slab.h>
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#include <asm/unaligned.h>
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#include "ieee80211_i.h"
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#include "mesh.h"
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#include "driver-ops.h"
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static int mesh_allocated;
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static struct kmem_cache *rm_cache;
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bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
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{
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return (mgmt->u.action.u.mesh_action.action_code ==
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WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
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}
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void ieee80211s_init(void)
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{
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mesh_pathtbl_init();
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mesh_allocated = 1;
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rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
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0, 0, NULL);
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}
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void ieee80211s_stop(void)
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{
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if (!mesh_allocated)
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return;
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mesh_pathtbl_unregister();
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kmem_cache_destroy(rm_cache);
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}
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static void ieee80211_mesh_housekeeping_timer(unsigned long data)
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{
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struct ieee80211_sub_if_data *sdata = (void *) data;
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
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ieee80211_queue_work(&local->hw, &sdata->work);
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}
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/**
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* mesh_matches_local - check if the config of a mesh point matches ours
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*
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* @sdata: local mesh subif
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* @ie: information elements of a management frame from the mesh peer
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*
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* This function checks if the mesh configuration of a mesh point matches the
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* local mesh configuration, i.e. if both nodes belong to the same mesh network.
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*/
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bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
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struct ieee802_11_elems *ie)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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u32 basic_rates = 0;
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struct cfg80211_chan_def sta_chan_def;
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/*
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* As support for each feature is added, check for matching
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* - On mesh config capabilities
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* - Power Save Support En
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* - Sync support enabled
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* - Sync support active
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* - Sync support required from peer
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* - MDA enabled
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* - Power management control on fc
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*/
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if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
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memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
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(ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
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(ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
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(ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
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(ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
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(ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
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return false;
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ieee80211_sta_get_rates(sdata, ie, ieee80211_get_sdata_band(sdata),
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&basic_rates);
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if (sdata->vif.bss_conf.basic_rates != basic_rates)
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return false;
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ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
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ie->ht_operation, &sta_chan_def);
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if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
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&sta_chan_def))
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return false;
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return true;
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}
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/**
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* mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
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*
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* @ie: information elements of a management frame from the mesh peer
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*/
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bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
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{
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return (ie->mesh_config->meshconf_cap &
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IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
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}
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/**
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* mesh_accept_plinks_update - update accepting_plink in local mesh beacons
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*
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* @sdata: mesh interface in which mesh beacons are going to be updated
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*
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* Returns: beacon changed flag if the beacon content changed.
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*/
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u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
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{
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bool free_plinks;
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u32 changed = 0;
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/* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
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* the mesh interface might be able to establish plinks with peers that
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* are already on the table but are not on PLINK_ESTAB state. However,
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* in general the mesh interface is not accepting peer link requests
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* from new peers, and that must be reflected in the beacon
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*/
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free_plinks = mesh_plink_availables(sdata);
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if (free_plinks != sdata->u.mesh.accepting_plinks) {
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sdata->u.mesh.accepting_plinks = free_plinks;
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changed = BSS_CHANGED_BEACON;
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}
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return changed;
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}
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/*
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* mesh_sta_cleanup - clean up any mesh sta state
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*
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* @sta: mesh sta to clean up.
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*/
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void mesh_sta_cleanup(struct sta_info *sta)
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{
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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u32 changed;
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/*
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* maybe userspace handles peer allocation and peering, but in either
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* case the beacon is still generated by the kernel and we might need
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* an update.
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*/
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changed = mesh_accept_plinks_update(sdata);
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if (!sdata->u.mesh.user_mpm) {
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changed |= mesh_plink_deactivate(sta);
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del_timer_sync(&sta->plink_timer);
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}
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if (changed)
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ieee80211_mbss_info_change_notify(sdata, changed);
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}
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int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
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{
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int i;
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sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
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if (!sdata->u.mesh.rmc)
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return -ENOMEM;
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sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
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for (i = 0; i < RMC_BUCKETS; i++)
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INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
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return 0;
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}
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void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
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{
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struct mesh_rmc *rmc = sdata->u.mesh.rmc;
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struct rmc_entry *p, *n;
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int i;
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if (!sdata->u.mesh.rmc)
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return;
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for (i = 0; i < RMC_BUCKETS; i++) {
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list_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
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list_del(&p->list);
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kmem_cache_free(rm_cache, p);
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}
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}
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kfree(rmc);
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sdata->u.mesh.rmc = NULL;
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}
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/**
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* mesh_rmc_check - Check frame in recent multicast cache and add if absent.
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*
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* @sdata: interface
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* @sa: source address
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* @mesh_hdr: mesh_header
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*
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* Returns: 0 if the frame is not in the cache, nonzero otherwise.
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*
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* Checks using the source address and the mesh sequence number if we have
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* received this frame lately. If the frame is not in the cache, it is added to
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* it.
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*/
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int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
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const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
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{
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struct mesh_rmc *rmc = sdata->u.mesh.rmc;
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u32 seqnum = 0;
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int entries = 0;
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u8 idx;
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struct rmc_entry *p, *n;
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/* Don't care about endianness since only match matters */
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memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
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idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
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list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
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++entries;
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if (time_after(jiffies, p->exp_time) ||
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entries == RMC_QUEUE_MAX_LEN) {
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list_del(&p->list);
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kmem_cache_free(rm_cache, p);
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--entries;
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} else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
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return -1;
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}
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p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
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if (!p)
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return 0;
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p->seqnum = seqnum;
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p->exp_time = jiffies + RMC_TIMEOUT;
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memcpy(p->sa, sa, ETH_ALEN);
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list_add(&p->list, &rmc->bucket[idx]);
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return 0;
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}
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int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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u8 *pos, neighbors;
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u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
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if (skb_tailroom(skb) < 2 + meshconf_len)
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return -ENOMEM;
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pos = skb_put(skb, 2 + meshconf_len);
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*pos++ = WLAN_EID_MESH_CONFIG;
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*pos++ = meshconf_len;
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/* save a pointer for quick updates in pre-tbtt */
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ifmsh->meshconf_offset = pos - skb->data;
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/* Active path selection protocol ID */
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*pos++ = ifmsh->mesh_pp_id;
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/* Active path selection metric ID */
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*pos++ = ifmsh->mesh_pm_id;
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/* Congestion control mode identifier */
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*pos++ = ifmsh->mesh_cc_id;
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/* Synchronization protocol identifier */
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*pos++ = ifmsh->mesh_sp_id;
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/* Authentication Protocol identifier */
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*pos++ = ifmsh->mesh_auth_id;
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/* Mesh Formation Info - number of neighbors */
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neighbors = atomic_read(&ifmsh->estab_plinks);
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neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
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*pos++ = neighbors << 1;
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/* Mesh capability */
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*pos = 0x00;
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*pos |= ifmsh->mshcfg.dot11MeshForwarding ?
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IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
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*pos |= ifmsh->accepting_plinks ?
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IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
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/* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
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*pos |= ifmsh->ps_peers_deep_sleep ?
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IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
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*pos++ |= ifmsh->adjusting_tbtt ?
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IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00;
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*pos++ = 0x00;
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return 0;
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}
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int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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u8 *pos;
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if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
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return -ENOMEM;
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pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
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*pos++ = WLAN_EID_MESH_ID;
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*pos++ = ifmsh->mesh_id_len;
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if (ifmsh->mesh_id_len)
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memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
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return 0;
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}
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static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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u8 *pos;
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/* see IEEE802.11-2012 13.14.6 */
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if (ifmsh->ps_peers_light_sleep == 0 &&
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ifmsh->ps_peers_deep_sleep == 0 &&
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ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
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return 0;
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if (skb_tailroom(skb) < 4)
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return -ENOMEM;
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pos = skb_put(skb, 2 + 2);
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*pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
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*pos++ = 2;
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put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
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return 0;
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}
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int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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u8 offset, len;
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const u8 *data;
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if (!ifmsh->ie || !ifmsh->ie_len)
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return 0;
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/* fast-forward to vendor IEs */
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offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
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if (offset) {
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len = ifmsh->ie_len - offset;
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data = ifmsh->ie + offset;
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if (skb_tailroom(skb) < len)
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return -ENOMEM;
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memcpy(skb_put(skb, len), data, len);
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}
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return 0;
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}
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int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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u8 len = 0;
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const u8 *data;
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if (!ifmsh->ie || !ifmsh->ie_len)
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return 0;
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/* find RSN IE */
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data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
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if (!data)
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return 0;
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len = data[1] + 2;
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if (skb_tailroom(skb) < len)
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return -ENOMEM;
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memcpy(skb_put(skb, len), data, len);
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return 0;
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}
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static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_chanctx_conf *chanctx_conf;
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struct ieee80211_channel *chan;
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u8 *pos;
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if (skb_tailroom(skb) < 3)
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return -ENOMEM;
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rcu_read_lock();
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chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
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if (WARN_ON(!chanctx_conf)) {
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rcu_read_unlock();
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return -EINVAL;
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}
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chan = chanctx_conf->def.chan;
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rcu_read_unlock();
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pos = skb_put(skb, 2 + 1);
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*pos++ = WLAN_EID_DS_PARAMS;
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*pos++ = 1;
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*pos++ = ieee80211_frequency_to_channel(chan->center_freq);
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return 0;
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}
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int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_local *local = sdata->local;
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enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
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struct ieee80211_supported_band *sband;
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u8 *pos;
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sband = local->hw.wiphy->bands[band];
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if (!sband->ht_cap.ht_supported ||
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sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
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sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
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sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
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return 0;
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if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
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return -ENOMEM;
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pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
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ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
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return 0;
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}
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int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_channel *channel;
|
|
enum nl80211_channel_type channel_type =
|
|
cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef);
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_sta_ht_cap *ht_cap;
|
|
u8 *pos;
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (WARN_ON(!chanctx_conf)) {
|
|
rcu_read_unlock();
|
|
return -EINVAL;
|
|
}
|
|
channel = chanctx_conf->def.chan;
|
|
rcu_read_unlock();
|
|
|
|
sband = local->hw.wiphy->bands[channel->band];
|
|
ht_cap = &sband->ht_cap;
|
|
|
|
if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT)
|
|
return 0;
|
|
|
|
if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
|
|
return -ENOMEM;
|
|
|
|
pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
|
|
ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
|
|
sdata->vif.bss_conf.ht_operation_mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ieee80211_mesh_path_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
}
|
|
|
|
static void ieee80211_mesh_path_root_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
}
|
|
|
|
void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
|
|
{
|
|
if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
|
|
set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
|
|
else {
|
|
clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
|
|
/* stop running timer */
|
|
del_timer_sync(&ifmsh->mesh_path_root_timer);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
|
|
* @hdr: 802.11 frame header
|
|
* @fc: frame control field
|
|
* @meshda: destination address in the mesh
|
|
* @meshsa: source address address in the mesh. Same as TA, as frame is
|
|
* locally originated.
|
|
*
|
|
* Return the length of the 802.11 (does not include a mesh control header)
|
|
*/
|
|
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
|
|
const u8 *meshda, const u8 *meshsa)
|
|
{
|
|
if (is_multicast_ether_addr(meshda)) {
|
|
*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
|
|
/* DA TA SA */
|
|
memcpy(hdr->addr1, meshda, ETH_ALEN);
|
|
memcpy(hdr->addr2, meshsa, ETH_ALEN);
|
|
memcpy(hdr->addr3, meshsa, ETH_ALEN);
|
|
return 24;
|
|
} else {
|
|
*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
|
|
/* RA TA DA SA */
|
|
eth_zero_addr(hdr->addr1); /* RA is resolved later */
|
|
memcpy(hdr->addr2, meshsa, ETH_ALEN);
|
|
memcpy(hdr->addr3, meshda, ETH_ALEN);
|
|
memcpy(hdr->addr4, meshsa, ETH_ALEN);
|
|
return 30;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ieee80211_new_mesh_header - create a new mesh header
|
|
* @sdata: mesh interface to be used
|
|
* @meshhdr: uninitialized mesh header
|
|
* @addr4or5: 1st address in the ae header, which may correspond to address 4
|
|
* (if addr6 is NULL) or address 5 (if addr6 is present). It may
|
|
* be NULL.
|
|
* @addr6: 2nd address in the ae header, which corresponds to addr6 of the
|
|
* mesh frame
|
|
*
|
|
* Return the header length.
|
|
*/
|
|
int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211s_hdr *meshhdr,
|
|
const char *addr4or5, const char *addr6)
|
|
{
|
|
if (WARN_ON(!addr4or5 && addr6))
|
|
return 0;
|
|
|
|
memset(meshhdr, 0, sizeof(*meshhdr));
|
|
|
|
meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
|
|
|
|
/* FIXME: racy -- TX on multiple queues can be concurrent */
|
|
put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
|
|
sdata->u.mesh.mesh_seqnum++;
|
|
|
|
if (addr4or5 && !addr6) {
|
|
meshhdr->flags |= MESH_FLAGS_AE_A4;
|
|
memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
|
|
return 2 * ETH_ALEN;
|
|
} else if (addr4or5 && addr6) {
|
|
meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
|
|
memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
|
|
memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
|
|
return 3 * ETH_ALEN;
|
|
}
|
|
|
|
return ETH_ALEN;
|
|
}
|
|
|
|
static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
u32 changed;
|
|
|
|
if (ifmsh->mshcfg.plink_timeout > 0)
|
|
ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
|
|
mesh_path_expire(sdata);
|
|
|
|
changed = mesh_accept_plinks_update(sdata);
|
|
ieee80211_mbss_info_change_notify(sdata, changed);
|
|
|
|
mod_timer(&ifmsh->housekeeping_timer,
|
|
round_jiffies(jiffies +
|
|
IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
|
|
}
|
|
|
|
static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
u32 interval;
|
|
|
|
mesh_path_tx_root_frame(sdata);
|
|
|
|
if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
|
|
interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
|
|
else
|
|
interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
|
|
|
|
mod_timer(&ifmsh->mesh_path_root_timer,
|
|
round_jiffies(TU_TO_EXP_TIME(interval)));
|
|
}
|
|
|
|
static int
|
|
ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
|
|
{
|
|
struct beacon_data *bcn;
|
|
int head_len, tail_len;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_mgmt *mgmt;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct mesh_csa_settings *csa;
|
|
enum ieee80211_band band;
|
|
u8 *pos;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) +
|
|
sizeof(mgmt->u.beacon);
|
|
|
|
sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
band = chanctx_conf->def.chan->band;
|
|
rcu_read_unlock();
|
|
|
|
head_len = hdr_len +
|
|
2 + /* NULL SSID */
|
|
/* Channel Switch Announcement */
|
|
2 + sizeof(struct ieee80211_channel_sw_ie) +
|
|
/* Mesh Channel Swith Parameters */
|
|
2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
|
|
2 + 8 + /* supported rates */
|
|
2 + 3; /* DS params */
|
|
tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
|
|
2 + sizeof(struct ieee80211_ht_cap) +
|
|
2 + sizeof(struct ieee80211_ht_operation) +
|
|
2 + ifmsh->mesh_id_len +
|
|
2 + sizeof(struct ieee80211_meshconf_ie) +
|
|
2 + sizeof(__le16) + /* awake window */
|
|
ifmsh->ie_len;
|
|
|
|
bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
|
|
/* need an skb for IE builders to operate on */
|
|
skb = dev_alloc_skb(max(head_len, tail_len));
|
|
|
|
if (!bcn || !skb)
|
|
goto out_free;
|
|
|
|
/*
|
|
* pointers go into the block we allocated,
|
|
* memory is | beacon_data | head | tail |
|
|
*/
|
|
bcn->head = ((u8 *) bcn) + sizeof(*bcn);
|
|
|
|
/* fill in the head */
|
|
mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
|
|
memset(mgmt, 0, hdr_len);
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_BEACON);
|
|
eth_broadcast_addr(mgmt->da);
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
|
|
ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
|
|
mgmt->u.beacon.beacon_int =
|
|
cpu_to_le16(sdata->vif.bss_conf.beacon_int);
|
|
mgmt->u.beacon.capab_info |= cpu_to_le16(
|
|
sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
|
|
|
|
pos = skb_put(skb, 2);
|
|
*pos++ = WLAN_EID_SSID;
|
|
*pos++ = 0x0;
|
|
|
|
rcu_read_lock();
|
|
csa = rcu_dereference(ifmsh->csa);
|
|
if (csa) {
|
|
pos = skb_put(skb, 13);
|
|
memset(pos, 0, 13);
|
|
*pos++ = WLAN_EID_CHANNEL_SWITCH;
|
|
*pos++ = 3;
|
|
*pos++ = 0x0;
|
|
*pos++ = ieee80211_frequency_to_channel(
|
|
csa->settings.chandef.chan->center_freq);
|
|
bcn->csa_counter_offsets[0] = hdr_len + 6;
|
|
*pos++ = csa->settings.count;
|
|
*pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
|
|
*pos++ = 6;
|
|
if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
|
|
*pos++ = ifmsh->mshcfg.dot11MeshTTL;
|
|
*pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
|
|
} else {
|
|
*pos++ = ifmsh->chsw_ttl;
|
|
}
|
|
*pos++ |= csa->settings.block_tx ?
|
|
WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
|
|
put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
|
|
pos += 2;
|
|
put_unaligned_le16(ifmsh->pre_value, pos);
|
|
pos += 2;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
|
|
mesh_add_ds_params_ie(sdata, skb))
|
|
goto out_free;
|
|
|
|
bcn->head_len = skb->len;
|
|
memcpy(bcn->head, skb->data, bcn->head_len);
|
|
|
|
/* now the tail */
|
|
skb_trim(skb, 0);
|
|
bcn->tail = bcn->head + bcn->head_len;
|
|
|
|
if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
|
|
mesh_add_rsn_ie(sdata, skb) ||
|
|
mesh_add_ht_cap_ie(sdata, skb) ||
|
|
mesh_add_ht_oper_ie(sdata, skb) ||
|
|
mesh_add_meshid_ie(sdata, skb) ||
|
|
mesh_add_meshconf_ie(sdata, skb) ||
|
|
mesh_add_awake_window_ie(sdata, skb) ||
|
|
mesh_add_vendor_ies(sdata, skb))
|
|
goto out_free;
|
|
|
|
bcn->tail_len = skb->len;
|
|
memcpy(bcn->tail, skb->data, bcn->tail_len);
|
|
bcn->meshconf = (struct ieee80211_meshconf_ie *)
|
|
(bcn->tail + ifmsh->meshconf_offset);
|
|
|
|
dev_kfree_skb(skb);
|
|
rcu_assign_pointer(ifmsh->beacon, bcn);
|
|
return 0;
|
|
out_free:
|
|
kfree(bcn);
|
|
dev_kfree_skb(skb);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int
|
|
ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct beacon_data *old_bcn;
|
|
int ret;
|
|
|
|
old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
|
|
lockdep_is_held(&sdata->wdev.mtx));
|
|
ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
|
|
if (ret)
|
|
/* just reuse old beacon */
|
|
return ret;
|
|
|
|
if (old_bcn)
|
|
kfree_rcu(old_bcn, rcu_head);
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
|
|
u32 changed)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
unsigned long bits = changed;
|
|
u32 bit;
|
|
|
|
if (!bits)
|
|
return;
|
|
|
|
/* if we race with running work, worst case this work becomes a noop */
|
|
for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
|
|
set_bit(bit, &ifmsh->mbss_changed);
|
|
set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
}
|
|
|
|
int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee80211_local *local = sdata->local;
|
|
u32 changed = BSS_CHANGED_BEACON |
|
|
BSS_CHANGED_BEACON_ENABLED |
|
|
BSS_CHANGED_HT |
|
|
BSS_CHANGED_BASIC_RATES |
|
|
BSS_CHANGED_BEACON_INT;
|
|
|
|
local->fif_other_bss++;
|
|
/* mesh ifaces must set allmulti to forward mcast traffic */
|
|
atomic_inc(&local->iff_allmultis);
|
|
ieee80211_configure_filter(local);
|
|
|
|
ifmsh->mesh_cc_id = 0; /* Disabled */
|
|
/* register sync ops from extensible synchronization framework */
|
|
ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
|
|
ifmsh->adjusting_tbtt = false;
|
|
ifmsh->sync_offset_clockdrift_max = 0;
|
|
set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
|
|
ieee80211_mesh_root_setup(ifmsh);
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
sdata->vif.bss_conf.ht_operation_mode =
|
|
ifmsh->mshcfg.ht_opmode;
|
|
sdata->vif.bss_conf.enable_beacon = true;
|
|
|
|
changed |= ieee80211_mps_local_status_update(sdata);
|
|
|
|
if (ieee80211_mesh_build_beacon(ifmsh)) {
|
|
ieee80211_stop_mesh(sdata);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ieee80211_recalc_dtim(local, sdata);
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
netif_carrier_on(sdata->dev);
|
|
return 0;
|
|
}
|
|
|
|
void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct beacon_data *bcn;
|
|
|
|
netif_carrier_off(sdata->dev);
|
|
|
|
/* stop the beacon */
|
|
ifmsh->mesh_id_len = 0;
|
|
sdata->vif.bss_conf.enable_beacon = false;
|
|
clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
|
|
bcn = rcu_dereference_protected(ifmsh->beacon,
|
|
lockdep_is_held(&sdata->wdev.mtx));
|
|
RCU_INIT_POINTER(ifmsh->beacon, NULL);
|
|
kfree_rcu(bcn, rcu_head);
|
|
|
|
/* flush STAs and mpaths on this iface */
|
|
sta_info_flush(sdata);
|
|
mesh_path_flush_by_iface(sdata);
|
|
|
|
/* free all potentially still buffered group-addressed frames */
|
|
local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
|
|
skb_queue_purge(&ifmsh->ps.bc_buf);
|
|
|
|
del_timer_sync(&sdata->u.mesh.housekeeping_timer);
|
|
del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
|
|
del_timer_sync(&sdata->u.mesh.mesh_path_timer);
|
|
|
|
/* clear any mesh work (for next join) we may have accrued */
|
|
ifmsh->wrkq_flags = 0;
|
|
ifmsh->mbss_changed = 0;
|
|
|
|
local->fif_other_bss--;
|
|
atomic_dec(&local->iff_allmultis);
|
|
ieee80211_configure_filter(local);
|
|
}
|
|
|
|
static bool
|
|
ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee802_11_elems *elems, bool beacon)
|
|
{
|
|
struct cfg80211_csa_settings params;
|
|
struct ieee80211_csa_ie csa_ie;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
|
|
int err;
|
|
u32 sta_flags;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
sta_flags = IEEE80211_STA_DISABLE_VHT;
|
|
switch (sdata->vif.bss_conf.chandef.width) {
|
|
case NL80211_CHAN_WIDTH_20_NOHT:
|
|
sta_flags |= IEEE80211_STA_DISABLE_HT;
|
|
case NL80211_CHAN_WIDTH_20:
|
|
sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
memset(&csa_ie, 0, sizeof(csa_ie));
|
|
err = ieee80211_parse_ch_switch_ie(sdata, elems, band,
|
|
sta_flags, sdata->vif.addr,
|
|
&csa_ie);
|
|
if (err < 0)
|
|
return false;
|
|
if (err)
|
|
return false;
|
|
|
|
params.chandef = csa_ie.chandef;
|
|
params.count = csa_ie.count;
|
|
|
|
if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
|
|
IEEE80211_CHAN_DISABLED)) {
|
|
sdata_info(sdata,
|
|
"mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
|
|
sdata->vif.addr,
|
|
params.chandef.chan->center_freq,
|
|
params.chandef.width,
|
|
params.chandef.center_freq1,
|
|
params.chandef.center_freq2);
|
|
return false;
|
|
}
|
|
|
|
err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
|
|
¶ms.chandef,
|
|
NL80211_IFTYPE_MESH_POINT);
|
|
if (err < 0)
|
|
return false;
|
|
if (err > 0)
|
|
/* TODO: DFS not (yet) supported */
|
|
return false;
|
|
|
|
params.radar_required = err;
|
|
|
|
if (cfg80211_chandef_identical(¶ms.chandef,
|
|
&sdata->vif.bss_conf.chandef)) {
|
|
mcsa_dbg(sdata,
|
|
"received csa with an identical chandef, ignoring\n");
|
|
return true;
|
|
}
|
|
|
|
mcsa_dbg(sdata,
|
|
"received channel switch announcement to go to channel %d MHz\n",
|
|
params.chandef.chan->center_freq);
|
|
|
|
params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
|
|
if (beacon) {
|
|
ifmsh->chsw_ttl = csa_ie.ttl - 1;
|
|
if (ifmsh->pre_value >= csa_ie.pre_value)
|
|
return false;
|
|
ifmsh->pre_value = csa_ie.pre_value;
|
|
}
|
|
|
|
if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
|
|
return false;
|
|
|
|
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
|
|
|
|
if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
|
|
¶ms) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct sk_buff *presp;
|
|
struct beacon_data *bcn;
|
|
struct ieee80211_mgmt *hdr;
|
|
struct ieee802_11_elems elems;
|
|
size_t baselen;
|
|
u8 *pos;
|
|
|
|
pos = mgmt->u.probe_req.variable;
|
|
baselen = (u8 *) pos - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return;
|
|
|
|
ieee802_11_parse_elems(pos, len - baselen, false, &elems);
|
|
|
|
if (!elems.mesh_id)
|
|
return;
|
|
|
|
/* 802.11-2012 10.1.4.3.2 */
|
|
if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
|
|
!is_broadcast_ether_addr(mgmt->da)) ||
|
|
elems.ssid_len != 0)
|
|
return;
|
|
|
|
if (elems.mesh_id_len != 0 &&
|
|
(elems.mesh_id_len != ifmsh->mesh_id_len ||
|
|
memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
|
|
return;
|
|
|
|
rcu_read_lock();
|
|
bcn = rcu_dereference(ifmsh->beacon);
|
|
|
|
if (!bcn)
|
|
goto out;
|
|
|
|
presp = dev_alloc_skb(local->tx_headroom +
|
|
bcn->head_len + bcn->tail_len);
|
|
if (!presp)
|
|
goto out;
|
|
|
|
skb_reserve(presp, local->tx_headroom);
|
|
memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
|
|
memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
|
|
hdr = (struct ieee80211_mgmt *) presp->data;
|
|
hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_PROBE_RESP);
|
|
memcpy(hdr->da, mgmt->sa, ETH_ALEN);
|
|
IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
|
|
ieee80211_tx_skb(sdata, presp);
|
|
out:
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
|
|
u16 stype,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee802_11_elems elems;
|
|
struct ieee80211_channel *channel;
|
|
size_t baselen;
|
|
int freq;
|
|
enum ieee80211_band band = rx_status->band;
|
|
|
|
/* ignore ProbeResp to foreign address */
|
|
if (stype == IEEE80211_STYPE_PROBE_RESP &&
|
|
!ether_addr_equal(mgmt->da, sdata->vif.addr))
|
|
return;
|
|
|
|
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return;
|
|
|
|
ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
|
|
false, &elems);
|
|
|
|
/* ignore non-mesh or secure / unsecure mismatch */
|
|
if ((!elems.mesh_id || !elems.mesh_config) ||
|
|
(elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
|
|
(!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
|
|
return;
|
|
|
|
if (elems.ds_params)
|
|
freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
|
|
else
|
|
freq = rx_status->freq;
|
|
|
|
channel = ieee80211_get_channel(local->hw.wiphy, freq);
|
|
|
|
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
|
|
return;
|
|
|
|
if (mesh_matches_local(sdata, &elems))
|
|
mesh_neighbour_update(sdata, mgmt->sa, &elems);
|
|
|
|
if (ifmsh->sync_ops)
|
|
ifmsh->sync_ops->rx_bcn_presp(sdata,
|
|
stype, mgmt, &elems, rx_status);
|
|
|
|
if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
|
|
!sdata->vif.csa_active)
|
|
ieee80211_mesh_process_chnswitch(sdata, &elems, true);
|
|
}
|
|
|
|
int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct mesh_csa_settings *tmp_csa_settings;
|
|
int ret = 0;
|
|
int changed = 0;
|
|
|
|
/* Reset the TTL value and Initiator flag */
|
|
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
|
|
ifmsh->chsw_ttl = 0;
|
|
|
|
/* Remove the CSA and MCSP elements from the beacon */
|
|
tmp_csa_settings = rcu_dereference(ifmsh->csa);
|
|
RCU_INIT_POINTER(ifmsh->csa, NULL);
|
|
if (tmp_csa_settings)
|
|
kfree_rcu(tmp_csa_settings, rcu_head);
|
|
ret = ieee80211_mesh_rebuild_beacon(sdata);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
changed |= BSS_CHANGED_BEACON;
|
|
|
|
mcsa_dbg(sdata, "complete switching to center freq %d MHz",
|
|
sdata->vif.bss_conf.chandef.chan->center_freq);
|
|
return changed;
|
|
}
|
|
|
|
int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_csa_settings *csa_settings)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct mesh_csa_settings *tmp_csa_settings;
|
|
int ret = 0;
|
|
|
|
tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
|
|
GFP_ATOMIC);
|
|
if (!tmp_csa_settings)
|
|
return -ENOMEM;
|
|
|
|
memcpy(&tmp_csa_settings->settings, csa_settings,
|
|
sizeof(struct cfg80211_csa_settings));
|
|
|
|
rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
|
|
|
|
ret = ieee80211_mesh_rebuild_beacon(sdata);
|
|
if (ret) {
|
|
tmp_csa_settings = rcu_dereference(ifmsh->csa);
|
|
RCU_INIT_POINTER(ifmsh->csa, NULL);
|
|
kfree_rcu(tmp_csa_settings, rcu_head);
|
|
return ret;
|
|
}
|
|
|
|
return BSS_CHANGED_BEACON;
|
|
}
|
|
|
|
static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_mgmt *mgmt_fwd;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_local *local = sdata->local;
|
|
u8 *pos = mgmt->u.action.u.chan_switch.variable;
|
|
size_t offset_ttl;
|
|
|
|
skb = dev_alloc_skb(local->tx_headroom + len);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
skb_reserve(skb, local->tx_headroom);
|
|
mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len);
|
|
|
|
/* offset_ttl is based on whether the secondary channel
|
|
* offset is available or not. Subtract 1 from the mesh TTL
|
|
* and disable the initiator flag before forwarding.
|
|
*/
|
|
offset_ttl = (len < 42) ? 7 : 10;
|
|
*(pos + offset_ttl) -= 1;
|
|
*(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
|
|
|
|
memcpy(mgmt_fwd, mgmt, len);
|
|
eth_broadcast_addr(mgmt_fwd->da);
|
|
memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
|
|
|
|
ieee80211_tx_skb(sdata, skb);
|
|
return 0;
|
|
}
|
|
|
|
static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee802_11_elems elems;
|
|
u16 pre_value;
|
|
bool fwd_csa = true;
|
|
size_t baselen;
|
|
u8 *pos;
|
|
|
|
if (mgmt->u.action.u.measurement.action_code !=
|
|
WLAN_ACTION_SPCT_CHL_SWITCH)
|
|
return;
|
|
|
|
pos = mgmt->u.action.u.chan_switch.variable;
|
|
baselen = offsetof(struct ieee80211_mgmt,
|
|
u.action.u.chan_switch.variable);
|
|
ieee802_11_parse_elems(pos, len - baselen, false, &elems);
|
|
|
|
ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
|
|
if (!--ifmsh->chsw_ttl)
|
|
fwd_csa = false;
|
|
|
|
pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
|
|
if (ifmsh->pre_value >= pre_value)
|
|
return;
|
|
|
|
ifmsh->pre_value = pre_value;
|
|
|
|
if (!sdata->vif.csa_active &&
|
|
!ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
|
|
mcsa_dbg(sdata, "Failed to process CSA action frame");
|
|
return;
|
|
}
|
|
|
|
/* forward or re-broadcast the CSA frame */
|
|
if (fwd_csa) {
|
|
if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0)
|
|
mcsa_dbg(sdata, "Failed to forward the CSA frame");
|
|
}
|
|
}
|
|
|
|
static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
switch (mgmt->u.action.category) {
|
|
case WLAN_CATEGORY_SELF_PROTECTED:
|
|
switch (mgmt->u.action.u.self_prot.action_code) {
|
|
case WLAN_SP_MESH_PEERING_OPEN:
|
|
case WLAN_SP_MESH_PEERING_CLOSE:
|
|
case WLAN_SP_MESH_PEERING_CONFIRM:
|
|
mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
|
|
break;
|
|
}
|
|
break;
|
|
case WLAN_CATEGORY_MESH_ACTION:
|
|
if (mesh_action_is_path_sel(mgmt))
|
|
mesh_rx_path_sel_frame(sdata, mgmt, len);
|
|
break;
|
|
case WLAN_CATEGORY_SPECTRUM_MGMT:
|
|
mesh_rx_csa_frame(sdata, mgmt, len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_rx_status *rx_status;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u16 stype;
|
|
|
|
sdata_lock(sdata);
|
|
|
|
/* mesh already went down */
|
|
if (!sdata->u.mesh.mesh_id_len)
|
|
goto out;
|
|
|
|
rx_status = IEEE80211_SKB_RXCB(skb);
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
|
|
|
|
switch (stype) {
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
case IEEE80211_STYPE_BEACON:
|
|
ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
|
|
rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_PROBE_REQ:
|
|
ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_ACTION:
|
|
ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
|
|
break;
|
|
}
|
|
out:
|
|
sdata_unlock(sdata);
|
|
}
|
|
|
|
static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
u32 bit, changed = 0;
|
|
|
|
for_each_set_bit(bit, &ifmsh->mbss_changed,
|
|
sizeof(changed) * BITS_PER_BYTE) {
|
|
clear_bit(bit, &ifmsh->mbss_changed);
|
|
changed |= BIT(bit);
|
|
}
|
|
|
|
if (sdata->vif.bss_conf.enable_beacon &&
|
|
(changed & (BSS_CHANGED_BEACON |
|
|
BSS_CHANGED_HT |
|
|
BSS_CHANGED_BASIC_RATES |
|
|
BSS_CHANGED_BEACON_INT)))
|
|
if (ieee80211_mesh_rebuild_beacon(sdata))
|
|
return;
|
|
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
}
|
|
|
|
void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
sdata_lock(sdata);
|
|
|
|
/* mesh already went down */
|
|
if (!sdata->u.mesh.mesh_id_len)
|
|
goto out;
|
|
|
|
if (ifmsh->preq_queue_len &&
|
|
time_after(jiffies,
|
|
ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
|
|
mesh_path_start_discovery(sdata);
|
|
|
|
if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
|
|
mesh_mpath_table_grow();
|
|
|
|
if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags))
|
|
mesh_mpp_table_grow();
|
|
|
|
if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
|
|
ieee80211_mesh_housekeeping(sdata);
|
|
|
|
if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
|
|
ieee80211_mesh_rootpath(sdata);
|
|
|
|
if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
|
|
mesh_sync_adjust_tbtt(sdata);
|
|
|
|
if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
|
|
mesh_bss_info_changed(sdata);
|
|
out:
|
|
sdata_unlock(sdata);
|
|
}
|
|
|
|
void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list)
|
|
if (ieee80211_vif_is_mesh(&sdata->vif) &&
|
|
ieee80211_sdata_running(sdata))
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
static u8 zero_addr[ETH_ALEN] = {};
|
|
|
|
setup_timer(&ifmsh->housekeeping_timer,
|
|
ieee80211_mesh_housekeeping_timer,
|
|
(unsigned long) sdata);
|
|
|
|
ifmsh->accepting_plinks = true;
|
|
atomic_set(&ifmsh->mpaths, 0);
|
|
mesh_rmc_init(sdata);
|
|
ifmsh->last_preq = jiffies;
|
|
ifmsh->next_perr = jiffies;
|
|
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
|
|
/* Allocate all mesh structures when creating the first mesh interface. */
|
|
if (!mesh_allocated)
|
|
ieee80211s_init();
|
|
setup_timer(&ifmsh->mesh_path_timer,
|
|
ieee80211_mesh_path_timer,
|
|
(unsigned long) sdata);
|
|
setup_timer(&ifmsh->mesh_path_root_timer,
|
|
ieee80211_mesh_path_root_timer,
|
|
(unsigned long) sdata);
|
|
INIT_LIST_HEAD(&ifmsh->preq_queue.list);
|
|
skb_queue_head_init(&ifmsh->ps.bc_buf);
|
|
spin_lock_init(&ifmsh->mesh_preq_queue_lock);
|
|
spin_lock_init(&ifmsh->sync_offset_lock);
|
|
RCU_INIT_POINTER(ifmsh->beacon, NULL);
|
|
|
|
sdata->vif.bss_conf.bssid = zero_addr;
|
|
}
|