![Thomas Pedersen](/assets/img/avatar_default.png)
Since a v1 of the mesh gate series was accidentally applied, this patch contains the changes in v2. These are: - automatically make mesh gate a root node. - use TU_TO_EXP_TIME macro. - initialize timer instead of checking for NULL timer function. - cleanups. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
772 lines
21 KiB
C
772 lines
21 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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#define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01
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#define MESHCONF_CAPAB_FORWARDING 0x08
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#define TMR_RUNNING_HK 0
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#define TMR_RUNNING_MP 1
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#define TMR_RUNNING_MPR 2
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int mesh_allocated;
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static struct kmem_cache *rm_cache;
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#ifdef CONFIG_MAC80211_MESH
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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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#else
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bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
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{ return false; }
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#endif
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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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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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if (local->quiescing) {
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set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
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return;
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}
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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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* @ie: information elements of a management frame from the mesh peer
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* @sdata: local mesh subif
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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 ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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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 true;
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return false;
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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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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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void 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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/* 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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ieee80211_mesh_housekeeping_timer((unsigned long) sdata);
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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].list);
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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, 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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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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* @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(u8 *sa, struct ieee80211s_hdr *mesh_hdr,
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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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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, 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) &&
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(memcmp(sa, p->sa, ETH_ALEN) == 0))
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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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printk(KERN_DEBUG "o11s: could not allocate RMC entry\n");
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return 0;
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}
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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].list);
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return 0;
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}
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int
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mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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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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/* 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->mshstats.estab_plinks);
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/* Number of neighbor mesh STAs or 15 whichever is smaller */
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neighbors = (neighbors > 15) ? 15 : neighbors;
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*pos++ = neighbors << 1;
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/* Mesh capability */
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ifmsh->accepting_plinks = mesh_plink_availables(sdata);
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*pos = MESHCONF_CAPAB_FORWARDING;
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*pos++ |= ifmsh->accepting_plinks ?
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MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
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*pos++ = 0x00;
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return 0;
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}
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int
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mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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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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int
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mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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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
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mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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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 = ifmsh->ie;
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while (data < ifmsh->ie + ifmsh->ie_len) {
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if (*data == WLAN_EID_RSN) {
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len = data[1] + 2;
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break;
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}
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data++;
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}
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if (len) {
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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
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mesh_add_srates_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_supported_band *sband;
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int rate;
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u8 i, rates, *pos;
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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rates = sband->n_bitrates;
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if (rates > 8)
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rates = 8;
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if (skb_tailroom(skb) < rates + 2)
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return -ENOMEM;
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pos = skb_put(skb, rates + 2);
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*pos++ = WLAN_EID_SUPP_RATES;
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*pos++ = rates;
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for (i = 0; i < rates; i++) {
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rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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}
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return 0;
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}
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int
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mesh_add_ext_srates_ie(struct sk_buff *skb,
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struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_supported_band *sband;
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int rate;
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u8 i, exrates, *pos;
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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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exrates = sband->n_bitrates;
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if (exrates > 8)
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exrates -= 8;
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else
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exrates = 0;
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if (skb_tailroom(skb) < exrates + 2)
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return -ENOMEM;
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if (exrates) {
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pos = skb_put(skb, exrates + 2);
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*pos++ = WLAN_EID_EXT_SUPP_RATES;
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*pos++ = exrates;
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for (i = 8; i < sband->n_bitrates; i++) {
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rate = sband->bitrates[i].bitrate;
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*pos++ = (u8) (rate / 5);
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}
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}
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return 0;
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}
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int mesh_add_ds_params_ie(struct sk_buff *skb,
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struct ieee80211_sub_if_data *sdata)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_supported_band *sband;
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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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sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
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if (sband->band == IEEE80211_BAND_2GHZ) {
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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(local->hw.conf.channel->center_freq);
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}
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return 0;
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}
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static void ieee80211_mesh_path_timer(unsigned long data)
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{
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struct ieee80211_sub_if_data *sdata =
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(struct ieee80211_sub_if_data *) data;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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struct ieee80211_local *local = sdata->local;
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if (local->quiescing) {
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set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
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return;
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}
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ieee80211_queue_work(&local->hw, &sdata->work);
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}
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static void ieee80211_mesh_path_root_timer(unsigned long data)
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{
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struct ieee80211_sub_if_data *sdata =
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(struct ieee80211_sub_if_data *) data;
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struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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struct ieee80211_local *local = sdata->local;
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set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
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if (local->quiescing) {
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set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
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return;
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}
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ieee80211_queue_work(&local->hw, &sdata->work);
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}
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void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
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{
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if (ifmsh->mshcfg.dot11MeshHWMPRootMode)
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set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
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else {
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clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
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/* stop running timer */
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del_timer_sync(&ifmsh->mesh_path_root_timer);
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}
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}
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/**
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* ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
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* @hdr: 802.11 frame header
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* @fc: frame control field
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* @meshda: destination address in the mesh
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* @meshsa: source address address in the mesh. Same as TA, as frame is
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* locally originated.
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*
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* Return the length of the 802.11 (does not include a mesh control header)
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*/
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int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
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const u8 *meshda, const u8 *meshsa)
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{
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if (is_multicast_ether_addr(meshda)) {
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*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
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/* DA TA SA */
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memcpy(hdr->addr1, meshda, ETH_ALEN);
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memcpy(hdr->addr2, meshsa, ETH_ALEN);
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memcpy(hdr->addr3, meshsa, ETH_ALEN);
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return 24;
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} else {
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*fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
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IEEE80211_FCTL_TODS);
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/* RA TA DA SA */
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memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */
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memcpy(hdr->addr2, meshsa, ETH_ALEN);
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memcpy(hdr->addr3, meshda, ETH_ALEN);
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memcpy(hdr->addr4, meshsa, ETH_ALEN);
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return 30;
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}
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}
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/**
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* ieee80211_new_mesh_header - create a new mesh header
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* @meshhdr: uninitialized mesh header
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* @sdata: mesh interface to be used
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* @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 ieee80211s_hdr *meshhdr,
|
|
struct ieee80211_sub_if_data *sdata, char *addr4or5,
|
|
char *addr6)
|
|
{
|
|
int aelen = 0;
|
|
BUG_ON(!addr4or5 && addr6);
|
|
memset(meshhdr, 0, sizeof(*meshhdr));
|
|
meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
|
|
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;
|
|
aelen += ETH_ALEN;
|
|
memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
|
|
} else if (addr4or5 && addr6) {
|
|
meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
|
|
aelen += 2 * ETH_ALEN;
|
|
memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
|
|
memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
|
|
}
|
|
return 6 + aelen;
|
|
}
|
|
|
|
static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_if_mesh *ifmsh)
|
|
{
|
|
bool free_plinks;
|
|
|
|
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
|
|
printk(KERN_DEBUG "%s: running mesh housekeeping\n",
|
|
sdata->name);
|
|
#endif
|
|
|
|
ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
|
|
mesh_path_expire(sdata);
|
|
|
|
free_plinks = mesh_plink_availables(sdata);
|
|
if (free_plinks != sdata->u.mesh.accepting_plinks)
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
|
|
|
|
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;
|
|
|
|
mesh_path_tx_root_frame(sdata);
|
|
mod_timer(&ifmsh->mesh_path_root_timer,
|
|
round_jiffies(TU_TO_EXP_TIME(
|
|
ifmsh->mshcfg.dot11MeshHWMPRannInterval)));
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
/* use atomic bitops in case all timers fire at the same time */
|
|
|
|
if (del_timer_sync(&ifmsh->housekeeping_timer))
|
|
set_bit(TMR_RUNNING_HK, &ifmsh->timers_running);
|
|
if (del_timer_sync(&ifmsh->mesh_path_timer))
|
|
set_bit(TMR_RUNNING_MP, &ifmsh->timers_running);
|
|
if (del_timer_sync(&ifmsh->mesh_path_root_timer))
|
|
set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running);
|
|
}
|
|
|
|
void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running))
|
|
add_timer(&ifmsh->housekeeping_timer);
|
|
if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running))
|
|
add_timer(&ifmsh->mesh_path_timer);
|
|
if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running))
|
|
add_timer(&ifmsh->mesh_path_root_timer);
|
|
ieee80211_mesh_root_setup(ifmsh);
|
|
}
|
|
#endif
|
|
|
|
void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
struct ieee80211_local *local = sdata->local;
|
|
|
|
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 */
|
|
ifmsh->mesh_sp_id = 0; /* Neighbor Offset */
|
|
ifmsh->mesh_auth_id = 0; /* Disabled */
|
|
set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
|
|
ieee80211_mesh_root_setup(ifmsh);
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
|
|
BSS_CHANGED_BEACON_ENABLED |
|
|
BSS_CHANGED_BEACON_INT);
|
|
}
|
|
|
|
void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
ifmsh->mesh_id_len = 0;
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
|
|
sta_info_flush(local, NULL);
|
|
|
|
del_timer_sync(&sdata->u.mesh.housekeeping_timer);
|
|
del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
|
|
/*
|
|
* If the timer fired while we waited for it, it will have
|
|
* requeued the work. Now the work will be running again
|
|
* but will not rearm the timer again because it checks
|
|
* whether the interface is running, which, at this point,
|
|
* it no longer is.
|
|
*/
|
|
cancel_work_sync(&sdata->work);
|
|
|
|
local->fif_other_bss--;
|
|
atomic_dec(&local->iff_allmultis);
|
|
ieee80211_configure_filter(local);
|
|
}
|
|
|
|
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 ieee802_11_elems elems;
|
|
struct ieee80211_channel *channel;
|
|
u32 supp_rates = 0;
|
|
size_t baselen;
|
|
int freq;
|
|
enum ieee80211_band band = rx_status->band;
|
|
|
|
/* ignore ProbeResp to foreign address */
|
|
if (stype == IEEE80211_STYPE_PROBE_RESP &&
|
|
compare_ether_addr(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,
|
|
&elems);
|
|
|
|
/* ignore beacons from secure mesh peers if our security is off */
|
|
if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE)
|
|
return;
|
|
|
|
if (elems.ds_params && elems.ds_params_len == 1)
|
|
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 (elems.mesh_id && elems.mesh_config &&
|
|
mesh_matches_local(&elems, sdata)) {
|
|
supp_rates = ieee80211_sta_get_rates(local, &elems, band);
|
|
mesh_neighbour_update(mgmt->sa, supp_rates, sdata, &elems);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
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_ACTION:
|
|
ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
|
|
|
|
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, ifmsh);
|
|
|
|
if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
|
|
ieee80211_mesh_rootpath(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_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;
|
|
|
|
setup_timer(&ifmsh->housekeeping_timer,
|
|
ieee80211_mesh_housekeeping_timer,
|
|
(unsigned long) sdata);
|
|
|
|
ifmsh->accepting_plinks = true;
|
|
ifmsh->preq_id = 0;
|
|
ifmsh->sn = 0;
|
|
ifmsh->num_gates = 0;
|
|
atomic_set(&ifmsh->mpaths, 0);
|
|
mesh_rmc_init(sdata);
|
|
ifmsh->last_preq = jiffies;
|
|
/* 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);
|
|
spin_lock_init(&ifmsh->mesh_preq_queue_lock);
|
|
}
|