summaryrefslogtreecommitdiffstats
path: root/net/ieee80211/softmac/ieee80211softmac_scan.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ieee80211/softmac/ieee80211softmac_scan.c')
-rw-r--r--net/ieee80211/softmac/ieee80211softmac_scan.c254
1 files changed, 0 insertions, 254 deletions
diff --git a/net/ieee80211/softmac/ieee80211softmac_scan.c b/net/ieee80211/softmac/ieee80211softmac_scan.c
deleted file mode 100644
index bfab8d7db88f..000000000000
--- a/net/ieee80211/softmac/ieee80211softmac_scan.c
+++ /dev/null
@@ -1,254 +0,0 @@
-/*
- * Scanning routines.
- *
- * These are not exported because they're assigned to the function pointers.
- *
- * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net>
- * Joseph Jezak <josejx@gentoo.org>
- * Larry Finger <Larry.Finger@lwfinger.net>
- * Danny van Dyk <kugelfang@gentoo.org>
- * Michael Buesch <mbuesch@freenet.de>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * The full GNU General Public License is included in this distribution in the
- * file called COPYING.
- */
-
-#include <linux/completion.h>
-#include "ieee80211softmac_priv.h"
-
-/* internal, use to trigger scanning if needed.
- * Returns -EBUSY if already scanning,
- * result of start_scan otherwise */
-int
-ieee80211softmac_start_scan(struct ieee80211softmac_device *sm)
-{
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&sm->lock, flags);
- if (sm->scanning)
- {
- spin_unlock_irqrestore(&sm->lock, flags);
- return -EINPROGRESS;
- }
- sm->scanning = 1;
- spin_unlock_irqrestore(&sm->lock, flags);
-
- ret = sm->start_scan(sm->dev);
- if (ret) {
- spin_lock_irqsave(&sm->lock, flags);
- sm->scanning = 0;
- spin_unlock_irqrestore(&sm->lock, flags);
- }
- return ret;
-}
-
-void
-ieee80211softmac_stop_scan(struct ieee80211softmac_device *sm)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&sm->lock, flags);
-
- if (!sm->scanning) {
- spin_unlock_irqrestore(&sm->lock, flags);
- return;
- }
-
- spin_unlock_irqrestore(&sm->lock, flags);
- sm->stop_scan(sm->dev);
-}
-
-void
-ieee80211softmac_wait_for_scan(struct ieee80211softmac_device *sm)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&sm->lock, flags);
-
- if (!sm->scanning) {
- spin_unlock_irqrestore(&sm->lock, flags);
- return;
- }
-
- spin_unlock_irqrestore(&sm->lock, flags);
- sm->wait_for_scan(sm->dev);
-}
-
-
-/* internal scanning implementation follows */
-void ieee80211softmac_scan(struct work_struct *work)
-{
- int invalid_channel;
- u8 current_channel_idx;
- struct ieee80211softmac_scaninfo *si =
- container_of(work, struct ieee80211softmac_scaninfo,
- softmac_scan.work);
- struct ieee80211softmac_device *sm = si->mac;
- unsigned long flags;
-
- while (!(si->stop) && (si->current_channel_idx < si->number_channels)) {
- current_channel_idx = si->current_channel_idx;
- si->current_channel_idx++; /* go to the next channel */
-
- invalid_channel = (si->skip_flags & si->channels[current_channel_idx].flags);
-
- if (!invalid_channel) {
- sm->set_channel(sm->dev, si->channels[current_channel_idx].channel);
- // FIXME make this user configurable (active/passive)
- if(ieee80211softmac_send_mgt_frame(sm, NULL, IEEE80211_STYPE_PROBE_REQ, 0))
- printkl(KERN_DEBUG PFX "Sending Probe Request Failed\n");
-
- /* also send directed management frame for the network we're looking for */
- // TODO: is this if correct, or should we do this only if scanning from assoc request?
- if (sm->associnfo.req_essid.len)
- ieee80211softmac_send_mgt_frame(sm, &sm->associnfo.req_essid, IEEE80211_STYPE_PROBE_REQ, 0);
-
- spin_lock_irqsave(&sm->lock, flags);
- if (unlikely(!sm->running)) {
- /* Prevent reschedule on workqueue flush */
- spin_unlock_irqrestore(&sm->lock, flags);
- break;
- }
- queue_delayed_work(sm->wq, &si->softmac_scan, IEEE80211SOFTMAC_PROBE_DELAY);
- spin_unlock_irqrestore(&sm->lock, flags);
- return;
- } else {
- dprintk(PFX "Not probing Channel %d (not allowed here)\n", si->channels[current_channel_idx].channel);
- }
- }
-
- spin_lock_irqsave(&sm->lock, flags);
- cancel_delayed_work(&si->softmac_scan);
- si->started = 0;
- spin_unlock_irqrestore(&sm->lock, flags);
-
- dprintk(PFX "Scanning finished: scanned %d channels starting with channel %d\n",
- sm->scaninfo->number_channels, sm->scaninfo->channels[0].channel);
- ieee80211softmac_scan_finished(sm);
- complete_all(&sm->scaninfo->finished);
-}
-
-static inline struct ieee80211softmac_scaninfo *allocate_scaninfo(struct ieee80211softmac_device *mac)
-{
- /* ugh. can we call this without having the spinlock held? */
- struct ieee80211softmac_scaninfo *info = kmalloc(sizeof(struct ieee80211softmac_scaninfo), GFP_ATOMIC);
- if (unlikely(!info))
- return NULL;
- INIT_DELAYED_WORK(&info->softmac_scan, ieee80211softmac_scan);
- info->mac = mac;
- init_completion(&info->finished);
- return info;
-}
-
-int ieee80211softmac_start_scan_implementation(struct net_device *dev)
-{
- struct ieee80211softmac_device *sm = ieee80211_priv(dev);
- unsigned long flags;
-
- if (!(dev->flags & IFF_UP))
- return -ENODEV;
-
- assert(ieee80211softmac_scan_handlers_check_self(sm));
- if (!ieee80211softmac_scan_handlers_check_self(sm))
- return -EINVAL;
-
- spin_lock_irqsave(&sm->lock, flags);
- /* it looks like we need to hold the lock here
- * to make sure we don't allocate two of these... */
- if (unlikely(!sm->scaninfo))
- sm->scaninfo = allocate_scaninfo(sm);
- if (unlikely(!sm->scaninfo)) {
- spin_unlock_irqrestore(&sm->lock, flags);
- return -ENOMEM;
- }
-
- sm->scaninfo->skip_flags = IEEE80211_CH_INVALID;
- if (0 /* not scanning in IEEE802.11b */)//TODO
- sm->scaninfo->skip_flags |= IEEE80211_CH_B_ONLY;
- if (0 /* IEEE802.11a */) {//TODO
- sm->scaninfo->channels = sm->ieee->geo.a;
- sm->scaninfo->number_channels = sm->ieee->geo.a_channels;
- } else {
- sm->scaninfo->channels = sm->ieee->geo.bg;
- sm->scaninfo->number_channels = sm->ieee->geo.bg_channels;
- }
- sm->scaninfo->current_channel_idx = 0;
- sm->scaninfo->started = 1;
- sm->scaninfo->stop = 0;
- INIT_COMPLETION(sm->scaninfo->finished);
- queue_delayed_work(sm->wq, &sm->scaninfo->softmac_scan, 0);
- spin_unlock_irqrestore(&sm->lock, flags);
- return 0;
-}
-
-void ieee80211softmac_stop_scan_implementation(struct net_device *dev)
-{
- struct ieee80211softmac_device *sm = ieee80211_priv(dev);
- unsigned long flags;
-
- assert(ieee80211softmac_scan_handlers_check_self(sm));
- if (!ieee80211softmac_scan_handlers_check_self(sm))
- return;
-
- spin_lock_irqsave(&sm->lock, flags);
- assert(sm->scaninfo != NULL);
- if (sm->scaninfo) {
- if (sm->scaninfo->started)
- sm->scaninfo->stop = 1;
- else
- complete_all(&sm->scaninfo->finished);
- }
- spin_unlock_irqrestore(&sm->lock, flags);
-}
-
-void ieee80211softmac_wait_for_scan_implementation(struct net_device *dev)
-{
- struct ieee80211softmac_device *sm = ieee80211_priv(dev);
- unsigned long flags;
-
- assert(ieee80211softmac_scan_handlers_check_self(sm));
- if (!ieee80211softmac_scan_handlers_check_self(sm))
- return;
-
- spin_lock_irqsave(&sm->lock, flags);
- if (!sm->scaninfo->started) {
- spin_unlock_irqrestore(&sm->lock, flags);
- return;
- }
- spin_unlock_irqrestore(&sm->lock, flags);
- wait_for_completion(&sm->scaninfo->finished);
-}
-
-/* this is what drivers (that do scanning) call when they're done */
-void ieee80211softmac_scan_finished(struct ieee80211softmac_device *sm)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&sm->lock, flags);
- sm->scanning = 0;
- spin_unlock_irqrestore(&sm->lock, flags);
-
- if (sm->associnfo.bssvalid) {
- struct ieee80211softmac_network *net;
-
- net = ieee80211softmac_get_network_by_bssid(sm, sm->associnfo.bssid);
- if (net)
- sm->set_channel(sm->dev, net->channel);
- }
- ieee80211softmac_call_events(sm, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, NULL);
-}
-EXPORT_SYMBOL_GPL(ieee80211softmac_scan_finished);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 14:18:55 +0100