aboutsummaryrefslogtreecommitdiff
path: root/net/ieee80211/softmac/ieee80211softmac_assoc.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ieee80211/softmac/ieee80211softmac_assoc.c')
-rw-r--r--net/ieee80211/softmac/ieee80211softmac_assoc.c489
1 files changed, 0 insertions, 489 deletions
diff --git a/net/ieee80211/softmac/ieee80211softmac_assoc.c b/net/ieee80211/softmac/ieee80211softmac_assoc.c
deleted file mode 100644
index c4d122ddd72..00000000000
--- a/net/ieee80211/softmac/ieee80211softmac_assoc.c
+++ /dev/null
@@ -1,489 +0,0 @@
-/*
- * This file contains the softmac's association logic.
- *
- * 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 "ieee80211softmac_priv.h"
-
-/*
- * Overview
- *
- * Before you can associate, you have to authenticate.
- *
- */
-
-/* Sends out an association request to the desired AP */
-static void
-ieee80211softmac_assoc(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
-{
- unsigned long flags;
-
- /* Switch to correct channel for this network */
- mac->set_channel(mac->dev, net->channel);
-
- /* Send association request */
- ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_ASSOC_REQ, 0);
-
- dprintk(KERN_INFO PFX "sent association request!\n");
-
- spin_lock_irqsave(&mac->lock, flags);
- mac->associnfo.associated = 0; /* just to make sure */
-
- /* Set a timer for timeout */
- /* FIXME: make timeout configurable */
- if (likely(mac->running))
- queue_delayed_work(mac->wq, &mac->associnfo.timeout, 5 * HZ);
- spin_unlock_irqrestore(&mac->lock, flags);
-}
-
-void
-ieee80211softmac_assoc_timeout(struct work_struct *work)
-{
- struct ieee80211softmac_device *mac =
- container_of(work, struct ieee80211softmac_device,
- associnfo.timeout.work);
- struct ieee80211softmac_network *n;
-
- mutex_lock(&mac->associnfo.mutex);
- /* we might race against ieee80211softmac_handle_assoc_response,
- * so make sure only one of us does something */
- if (!mac->associnfo.associating)
- goto out;
- mac->associnfo.associating = 0;
- mac->associnfo.bssvalid = 0;
- mac->associnfo.associated = 0;
-
- n = ieee80211softmac_get_network_by_bssid_locked(mac, mac->associnfo.bssid);
-
- dprintk(KERN_INFO PFX "assoc request timed out!\n");
- ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT, n);
-out:
- mutex_unlock(&mac->associnfo.mutex);
-}
-
-void
-ieee80211softmac_disassoc(struct ieee80211softmac_device *mac)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&mac->lock, flags);
- if (mac->associnfo.associating)
- cancel_delayed_work(&mac->associnfo.timeout);
-
- netif_carrier_off(mac->dev);
-
- mac->associnfo.associated = 0;
- mac->associnfo.bssvalid = 0;
- mac->associnfo.associating = 0;
- ieee80211softmac_init_bss(mac);
- ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_DISASSOCIATED, NULL);
- spin_unlock_irqrestore(&mac->lock, flags);
-}
-
-/* Sends out a disassociation request to the desired AP */
-void
-ieee80211softmac_send_disassoc_req(struct ieee80211softmac_device *mac, u16 reason)
-{
- struct ieee80211softmac_network *found;
-
- if (mac->associnfo.bssvalid && mac->associnfo.associated) {
- found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);
- if (found)
- ieee80211softmac_send_mgt_frame(mac, found, IEEE80211_STYPE_DISASSOC, reason);
- }
-
- ieee80211softmac_disassoc(mac);
-}
-
-static inline int
-we_support_all_basic_rates(struct ieee80211softmac_device *mac, u8 *from, u8 from_len)
-{
- int idx;
- u8 rate;
-
- for (idx = 0; idx < (from_len); idx++) {
- rate = (from)[idx];
- if (!(rate & IEEE80211_BASIC_RATE_MASK))
- continue;
- rate &= ~IEEE80211_BASIC_RATE_MASK;
- if (!ieee80211softmac_ratesinfo_rate_supported(&mac->ratesinfo, rate))
- return 0;
- }
- return 1;
-}
-
-static int
-network_matches_request(struct ieee80211softmac_device *mac, struct ieee80211_network *net)
-{
- /* we cannot associate to networks whose name we don't know */
- if (ieee80211_is_empty_essid(net->ssid, net->ssid_len))
- return 0;
- /* do not associate to a network whose BSSBasicRateSet we cannot support */
- if (!we_support_all_basic_rates(mac, net->rates, net->rates_len))
- return 0;
- /* do we really need to check the ex rates? */
- if (!we_support_all_basic_rates(mac, net->rates_ex, net->rates_ex_len))
- return 0;
-
- /* assume that users know what they're doing ...
- * (note we don't let them select a net we're incompatible with) */
- if (mac->associnfo.bssfixed) {
- return !memcmp(mac->associnfo.bssid, net->bssid, ETH_ALEN);
- }
-
- /* if 'ANY' network requested, take any that doesn't have privacy enabled */
- if (mac->associnfo.req_essid.len == 0
- && !(net->capability & WLAN_CAPABILITY_PRIVACY))
- return 1;
- if (net->ssid_len != mac->associnfo.req_essid.len)
- return 0;
- if (!memcmp(net->ssid, mac->associnfo.req_essid.data, mac->associnfo.req_essid.len))
- return 1;
- return 0;
-}
-
-static void
-ieee80211softmac_assoc_notify_scan(struct net_device *dev, int event_type, void *context)
-{
- struct ieee80211softmac_device *mac = ieee80211_priv(dev);
- ieee80211softmac_assoc_work(&mac->associnfo.work.work);
-}
-
-static void
-ieee80211softmac_assoc_notify_auth(struct net_device *dev, int event_type, void *context)
-{
- struct ieee80211softmac_device *mac = ieee80211_priv(dev);
-
- switch (event_type) {
- case IEEE80211SOFTMAC_EVENT_AUTHENTICATED:
- ieee80211softmac_assoc_work(&mac->associnfo.work.work);
- break;
- case IEEE80211SOFTMAC_EVENT_AUTH_FAILED:
- case IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT:
- ieee80211softmac_disassoc(mac);
- break;
- }
-}
-
-/* This function is called to handle userspace requests (asynchronously) */
-void
-ieee80211softmac_assoc_work(struct work_struct *work)
-{
- struct ieee80211softmac_device *mac =
- container_of(work, struct ieee80211softmac_device,
- associnfo.work.work);
- struct ieee80211softmac_network *found = NULL;
- struct ieee80211_network *net = NULL, *best = NULL;
- int bssvalid;
- unsigned long flags;
-
- mutex_lock(&mac->associnfo.mutex);
-
- if (!mac->associnfo.associating)
- goto out;
-
- /* ieee80211_disassoc might clear this */
- bssvalid = mac->associnfo.bssvalid;
-
- /* meh */
- if (mac->associnfo.associated)
- ieee80211softmac_send_disassoc_req(mac, WLAN_REASON_DISASSOC_STA_HAS_LEFT);
-
- /* try to find the requested network in our list, if we found one already */
- if (bssvalid || mac->associnfo.bssfixed)
- found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);
-
- /* Search the ieee80211 networks for this network if we didn't find it by bssid,
- * but only if we've scanned at least once (to get a better list of networks to
- * select from). If we have not scanned before, the !found logic below will be
- * invoked and will scan. */
- if (!found && (mac->associnfo.scan_retry < IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT))
- {
- s8 rssi = -128; /* if I don't initialise, gcc emits an invalid warning
- because it cannot follow the best pointer logic. */
- spin_lock_irqsave(&mac->ieee->lock, flags);
- list_for_each_entry(net, &mac->ieee->network_list, list) {
- /* we're supposed to find the network with
- * the best signal here, as we're asked to join
- * any network with a specific ESSID, and many
- * different ones could have that.
- *
- * I'll for now just go with the reported rssi.
- *
- * We also should take into account the rateset
- * here to find the best BSSID to try.
- */
- if (network_matches_request(mac, net)) {
- if (!best) {
- best = net;
- rssi = best->stats.rssi;
- continue;
- }
- /* we already had a matching network, so
- * compare their properties to get the
- * better of the two ... (see above)
- */
- if (rssi < net->stats.rssi) {
- best = net;
- rssi = best->stats.rssi;
- }
- }
- }
- /* if we unlock here, we might get interrupted and the `best'
- * pointer could go stale */
- if (best) {
- found = ieee80211softmac_create_network(mac, best);
- /* if found is still NULL, then we got -ENOMEM somewhere */
- if (found)
- ieee80211softmac_add_network(mac, found);
- }
- spin_unlock_irqrestore(&mac->ieee->lock, flags);
- }
-
- if (!found) {
- if (mac->associnfo.scan_retry > 0) {
- mac->associnfo.scan_retry--;
-
- /* We know of no such network. Let's scan.
- * NB: this also happens if we had no memory to copy the network info...
- * Maybe we can hope to have more memory after scanning finishes ;)
- */
- dprintk(KERN_INFO PFX "Associate: Scanning for networks first.\n");
- ieee80211softmac_notify(mac->dev, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, ieee80211softmac_assoc_notify_scan, NULL);
- if (ieee80211softmac_start_scan(mac)) {
- dprintk(KERN_INFO PFX "Associate: failed to initiate scan. Is device up?\n");
- }
- goto out;
- } else {
- mac->associnfo.associating = 0;
- mac->associnfo.associated = 0;
-
- dprintk(KERN_INFO PFX "Unable to find matching network after scan!\n");
- /* reset the retry counter for the next user request since we
- * break out and don't reschedule ourselves after this point. */
- mac->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
- ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND, NULL);
- goto out;
- }
- }
-
- /* reset the retry counter for the next user request since we
- * now found a net and will try to associate to it, but not
- * schedule this function again. */
- mac->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
- mac->associnfo.bssvalid = 1;
- memcpy(mac->associnfo.bssid, found->bssid, ETH_ALEN);
- /* copy the ESSID for displaying it */
- mac->associnfo.associate_essid.len = found->essid.len;
- memcpy(mac->associnfo.associate_essid.data, found->essid.data, IW_ESSID_MAX_SIZE + 1);
-
- /* we found a network! authenticate (if necessary) and associate to it. */
- if (found->authenticating) {
- dprintk(KERN_INFO PFX "Already requested authentication, waiting...\n");
- if(!mac->associnfo.assoc_wait) {
- mac->associnfo.assoc_wait = 1;
- ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify_auth, NULL, GFP_KERNEL);
- }
- goto out;
- }
- if (!found->authenticated && !found->authenticating) {
- /* This relies on the fact that _auth_req only queues the work,
- * otherwise adding the notification would be racy. */
- if (!ieee80211softmac_auth_req(mac, found)) {
- if(!mac->associnfo.assoc_wait) {
- dprintk(KERN_INFO PFX "Cannot associate without being authenticated, requested authentication\n");
- mac->associnfo.assoc_wait = 1;
- ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify_auth, NULL, GFP_KERNEL);
- }
- } else {
- printkl(KERN_WARNING PFX "Not authenticated, but requesting authentication failed. Giving up to associate\n");
- mac->associnfo.assoc_wait = 0;
- ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, found);
- }
- goto out;
- }
- /* finally! now we can start associating */
- mac->associnfo.assoc_wait = 0;
- ieee80211softmac_assoc(mac, found);
-
-out:
- mutex_unlock(&mac->associnfo.mutex);
-}
-
-/* call this to do whatever is necessary when we're associated */
-static void
-ieee80211softmac_associated(struct ieee80211softmac_device *mac,
- struct ieee80211_assoc_response * resp,
- struct ieee80211softmac_network *net)
-{
- u16 cap = le16_to_cpu(resp->capability);
- u8 erp_value = net->erp_value;
-
- mac->associnfo.associating = 0;
- mac->bssinfo.supported_rates = net->supported_rates;
- ieee80211softmac_recalc_txrates(mac);
-
- mac->associnfo.associated = 1;
-
- mac->associnfo.short_preamble_available =
- (cap & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0;
- ieee80211softmac_process_erp(mac, erp_value);
-
- if (mac->set_bssid_filter)
- mac->set_bssid_filter(mac->dev, net->bssid);
- memcpy(mac->ieee->bssid, net->bssid, ETH_ALEN);
- netif_carrier_on(mac->dev);
-
- mac->association_id = le16_to_cpup(&resp->aid);
-}
-
-/* received frame handling functions */
-int
-ieee80211softmac_handle_assoc_response(struct net_device * dev,
- struct ieee80211_assoc_response * resp,
- struct ieee80211_network * _ieee80211_network)
-{
- /* NOTE: the network parameter has to be mostly ignored by
- * this code because it is the ieee80211's pointer
- * to the struct, not ours (we made a copy)
- */
- struct ieee80211softmac_device *mac = ieee80211_priv(dev);
- u16 status = le16_to_cpup(&resp->status);
- struct ieee80211softmac_network *network = NULL;
- unsigned long flags;
- DECLARE_MAC_BUF(mac2);
-
- if (unlikely(!mac->running))
- return -ENODEV;
-
- spin_lock_irqsave(&mac->lock, flags);
-
- if (!mac->associnfo.associating) {
- /* we race against the timeout function, so make sure
- * only one of us can do work */
- spin_unlock_irqrestore(&mac->lock, flags);
- return 0;
- }
- network = ieee80211softmac_get_network_by_bssid_locked(mac, resp->header.addr3);
-
- /* someone sending us things without us knowing him? Ignore. */
- if (!network) {
- dprintk(KERN_INFO PFX "Received unrequested assocation response from %s\n",
- print_mac(mac2, resp->header.addr3));
- spin_unlock_irqrestore(&mac->lock, flags);
- return 0;
- }
-
- /* now that we know it was for us, we can cancel the timeout */
- cancel_delayed_work(&mac->associnfo.timeout);
-
- /* if the association response included an ERP IE, update our saved
- * copy */
- if (_ieee80211_network->flags & NETWORK_HAS_ERP_VALUE)
- network->erp_value = _ieee80211_network->erp_value;
-
- switch (status) {
- case 0:
- dprintk(KERN_INFO PFX "associated!\n");
- ieee80211softmac_associated(mac, resp, network);
- ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATED, network);
- break;
- case WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH:
- if (!network->auth_desynced_once) {
- /* there seem to be a few rare cases where our view of
- * the world is obscured, or buggy APs that don't DEAUTH
- * us properly. So we handle that, but allow it only once.
- */
- printkl(KERN_INFO PFX "We were not authenticated during association, retrying...\n");
- network->authenticated = 0;
- /* we don't want to do this more than once ... */
- network->auth_desynced_once = 1;
- queue_delayed_work(mac->wq, &mac->associnfo.work, 0);
- break;
- }
- default:
- dprintk(KERN_INFO PFX "associating failed (reason: 0x%x)!\n", status);
- mac->associnfo.associating = 0;
- mac->associnfo.bssvalid = 0;
- mac->associnfo.associated = 0;
- ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, network);
- }
-
- spin_unlock_irqrestore(&mac->lock, flags);
- return 0;
-}
-
-void
-ieee80211softmac_try_reassoc(struct ieee80211softmac_device *mac)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&mac->lock, flags);
- mac->associnfo.associating = 1;
- queue_delayed_work(mac->wq, &mac->associnfo.work, 0);
- spin_unlock_irqrestore(&mac->lock, flags);
-}
-
-int
-ieee80211softmac_handle_disassoc(struct net_device * dev,
- struct ieee80211_disassoc *disassoc)
-{
- struct ieee80211softmac_device *mac = ieee80211_priv(dev);
-
- if (unlikely(!mac->running))
- return -ENODEV;
-
- if (memcmp(disassoc->header.addr2, mac->associnfo.bssid, ETH_ALEN))
- return 0;
-
- if (memcmp(disassoc->header.addr1, mac->dev->dev_addr, ETH_ALEN))
- return 0;
-
- dprintk(KERN_INFO PFX "got disassoc frame\n");
- ieee80211softmac_disassoc(mac);
-
- ieee80211softmac_try_reassoc(mac);
-
- return 0;
-}
-
-int
-ieee80211softmac_handle_reassoc_req(struct net_device * dev,
- struct ieee80211_reassoc_request * resp)
-{
- struct ieee80211softmac_device *mac = ieee80211_priv(dev);
- struct ieee80211softmac_network *network;
-
- if (unlikely(!mac->running))
- return -ENODEV;
-
- network = ieee80211softmac_get_network_by_bssid(mac, resp->header.addr3);
- if (!network) {
- dprintkl(KERN_INFO PFX "reassoc request from unknown network\n");
- return 0;
- }
- queue_delayed_work(mac->wq, &mac->associnfo.work, 0);
-
- return 0;
-}