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Merge branch 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6

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This commit is contained in:
Jeff Garzik 2006-03-22 22:55:57 -05:00
commit fa4fa40a99
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292
include/net/ieee80211softmac.h Normal file
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@ -0,0 +1,292 @@
/*
* ieee80211softmac.h - public interface to the softmac
*
* Copyright (c) 2005 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.
*/
#ifndef IEEE80211SOFTMAC_H_
#define IEEE80211SOFTMAC_H_
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/list.h>
#include <net/ieee80211.h>
/* Once the API is considered more or less stable,
* this should be incremented on API incompatible changes.
*/
#define IEEE80211SOFTMAC_API 0
#define IEEE80211SOFTMAC_MAX_RATES_LEN 8
#define IEEE80211SOFTMAC_MAX_EX_RATES_LEN 255
struct ieee80211softmac_ratesinfo {
u8 count;
u8 rates[IEEE80211SOFTMAC_MAX_RATES_LEN + IEEE80211SOFTMAC_MAX_EX_RATES_LEN];
};
/* internal structures */
struct ieee80211softmac_network;
struct ieee80211softmac_scaninfo;
struct ieee80211softmac_essid {
u8 len;
char data[IW_ESSID_MAX_SIZE+1];
};
struct ieee80211softmac_wpa {
char *IE;
int IElen;
int IEbuflen;
};
/*
* Information about association
*
* Do we need a lock for this?
* We only ever use this structure inlined
* into our global struct. I've used its lock,
* but maybe we need a local one here?
*/
struct ieee80211softmac_assoc_info {
/*
* This is the requested ESSID. It is written
* only by the WX handlers.
*
*/
struct ieee80211softmac_essid req_essid;
/*
* the ESSID of the network we're currently
* associated (or trying) to. This is
* updated to the network's actual ESSID
* even if the requested ESSID was 'ANY'
*/
struct ieee80211softmac_essid associate_essid;
/* BSSID we're trying to associate to */
char bssid[ETH_ALEN];
/* some flags.
* static_essid is valid if the essid is constant,
* this is for use by the wx handlers only.
*
* associating is true, if the network has been
* auth'ed on and we are in the process of associating.
*
* bssvalid is true if we found a matching network
* and saved it's BSSID into the bssid above.
*/
u8 static_essid:1,
associating:1,
bssvalid:1;
/* Scan retries remaining */
int scan_retry;
struct work_struct work;
struct work_struct timeout;
};
enum {
IEEE80211SOFTMAC_AUTH_OPEN_REQUEST = 1,
IEEE80211SOFTMAC_AUTH_OPEN_RESPONSE = 2,
};
enum {
IEEE80211SOFTMAC_AUTH_SHARED_REQUEST = 1,
IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE = 2,
IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE = 3,
IEEE80211SOFTMAC_AUTH_SHARED_PASS = 4,
};
/* We should make these tunable
* AUTH_TIMEOUT seems really long, but that's what it is in BSD */
#define IEEE80211SOFTMAC_AUTH_TIMEOUT (12 * HZ)
#define IEEE80211SOFTMAC_AUTH_RETRY_LIMIT 5
#define IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT 3
struct ieee80211softmac_txrates {
/* The Bit-Rate to be used for multicast frames. */
u8 mcast_rate;
/* The Bit-Rate to be used for multicast fallback
* (If the device supports fallback and hardware-retry)
*/
u8 mcast_fallback;
/* The Bit-Rate to be used for any other (normal) data packet. */
u8 default_rate;
/* The Bit-Rate to be used for default fallback
* (If the device supports fallback and hardware-retry)
*/
u8 default_fallback;
};
/* Bits for txrates_change callback. */
#define IEEE80211SOFTMAC_TXRATECHG_DEFAULT (1 << 0) /* default_rate */
#define IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK (1 << 1) /* default_fallback */
#define IEEE80211SOFTMAC_TXRATECHG_MCAST (1 << 2) /* mcast_rate */
#define IEEE80211SOFTMAC_TXRATECHG_MCAST_FBACK (1 << 3) /* mcast_fallback */
struct ieee80211softmac_device {
/* 802.11 structure for data stuff */
struct ieee80211_device *ieee;
struct net_device *dev;
/* only valid if associated, then holds the Association ID */
u16 association_id;
/* the following methods are callbacks that the driver
* using this framework has to assign
*/
/* always assign these */
void (*set_bssid_filter)(struct net_device *dev, const u8 *bssid);
void (*set_channel)(struct net_device *dev, u8 channel);
/* assign if you need it, informational only */
void (*link_change)(struct net_device *dev);
/* If the hardware can do scanning, assign _all_ three of these callbacks.
* When the scan finishes, call ieee80211softmac_scan_finished().
*/
/* when called, start_scan is guaranteed to not be called again
* until you call ieee80211softmac_scan_finished.
* Return 0 if scanning could start, error otherwise.
* SOFTMAC AUTHORS: don't call this, use ieee80211softmac_start_scan */
int (*start_scan)(struct net_device *dev);
/* this should block until after ieee80211softmac_scan_finished was called
* SOFTMAC AUTHORS: don't call this, use ieee80211softmac_wait_for_scan */
void (*wait_for_scan)(struct net_device *dev);
/* stop_scan aborts a scan, but is asynchronous.
* if you want to wait for it too, use wait_for_scan
* SOFTMAC AUTHORS: don't call this, use ieee80211softmac_stop_scan */
void (*stop_scan)(struct net_device *dev);
/* we'll need something about beacons here too, for AP or ad-hoc modes */
/* Transmission rates to be used by the driver.
* The SoftMAC figures out the best possible rates.
* The driver just needs to read them.
*/
struct ieee80211softmac_txrates txrates;
/* If the driver needs to do stuff on TX rate changes, assign this callback. */
void (*txrates_change)(struct net_device *dev,
u32 changes, /* see IEEE80211SOFTMAC_TXRATECHG flags */
const struct ieee80211softmac_txrates *rates_before_change);
/* private stuff follows */
/* this lock protects this structure */
spinlock_t lock;
/* couple of flags */
u8 scanning:1, /* protects scanning from being done multiple times at once */
associated:1;
struct ieee80211softmac_scaninfo *scaninfo;
struct ieee80211softmac_assoc_info associnfo;
struct list_head auth_queue;
struct list_head events;
struct ieee80211softmac_ratesinfo ratesinfo;
int txrate_badness;
/* WPA stuff */
struct ieee80211softmac_wpa wpa;
/* we need to keep a list of network structs we copied */
struct list_head network_list;
/* This must be the last item so that it points to the data
* allocated beyond this structure by alloc_ieee80211 */
u8 priv[0];
};
extern void ieee80211softmac_scan_finished(struct ieee80211softmac_device *sm);
static inline void * ieee80211softmac_priv(struct net_device *dev)
{
return ((struct ieee80211softmac_device *)ieee80211_priv(dev))->priv;
}
extern struct net_device * alloc_ieee80211softmac(int sizeof_priv);
extern void free_ieee80211softmac(struct net_device *dev);
/* Call this function if you detect a lost TX fragment.
* (If the device indicates failure of ACK RX, for example.)
* It is wise to call this function if you are able to detect lost packets,
* because it contributes to the TX Rates auto adjustment.
*/
extern void ieee80211softmac_fragment_lost(struct net_device *dev,
u16 wireless_sequence_number);
/* Call this function before _start to tell the softmac what rates
* the hw supports. The rates parameter is copied, so you can
* free it right after calling this function.
* Note that the rates need to be sorted. */
extern void ieee80211softmac_set_rates(struct net_device *dev, u8 count, u8 *rates);
/* Start the SoftMAC. Call this after you initialized the device
* and it is ready to run.
*/
extern void ieee80211softmac_start(struct net_device *dev);
/* Stop the SoftMAC. Call this before you shutdown the device. */
extern void ieee80211softmac_stop(struct net_device *dev);
/*
* Event system
*/
/* valid event types */
#define IEEE80211SOFTMAC_EVENT_ANY -1 /*private use only*/
#define IEEE80211SOFTMAC_EVENT_SCAN_FINISHED 0
#define IEEE80211SOFTMAC_EVENT_ASSOCIATED 1
#define IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED 2
#define IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT 3
#define IEEE80211SOFTMAC_EVENT_AUTHENTICATED 4
#define IEEE80211SOFTMAC_EVENT_AUTH_FAILED 5
#define IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT 6
#define IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND 7
/* keep this updated! */
#define IEEE80211SOFTMAC_EVENT_LAST 7
/*
* If you want to be notified of certain events, you can call
* ieee80211softmac_notify[_atomic] with
* - event set to one of the constants below
* - fun set to a function pointer of the appropriate type
* - context set to the context data you want passed
* The return value is 0, or an error.
*/
typedef void (*notify_function_ptr)(struct net_device *dev, void *context);
#define ieee80211softmac_notify(dev, event, fun, context) ieee80211softmac_notify_gfp(dev, event, fun, context, GFP_KERNEL);
#define ieee80211softmac_notify_atomic(dev, event, fun, context) ieee80211softmac_notify_gfp(dev, event, fun, context, GFP_ATOMIC);
extern int ieee80211softmac_notify_gfp(struct net_device *dev,
int event, notify_function_ptr fun, void *context, gfp_t gfp_mask);
/* To clear pending work (for ifconfig down, etc.) */
extern void
ieee80211softmac_clear_pending_work(struct ieee80211softmac_device *sm);
#endif /* IEEE80211SOFTMAC_H_ */

94
include/net/ieee80211softmac_wx.h Normal file
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@ -0,0 +1,94 @@
/*
* This file contains the prototypes for the wireless extension
* handlers that the softmac API provides. Include this file to
* use the wx handlers, you can assign these directly.
*
* Copyright (c) 2005 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.
*/
#ifndef _IEEE80211SOFTMAC_WX_H
#define _IEEE80211SOFTMAC_WX_H
#include <net/ieee80211softmac.h>
#include <net/iw_handler.h>
extern int
ieee80211softmac_wx_trigger_scan(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_get_scan_results(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_set_essid(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_get_essid(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_set_rate(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_get_rate(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_get_wap(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_set_wap(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra);
extern int
ieee80211softmac_wx_set_genie(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu,
char *extra);
extern int
ieee80211softmac_wx_get_genie(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu,
char *extra);
#endif /* _IEEE80211SOFTMAC_WX */

1
net/ieee80211/Kconfig
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@ -66,3 +66,4 @@ config IEEE80211_CRYPT_TKIP
This can be compiled as a modules and it will be called
"ieee80211_crypt_tkip".
source "net/ieee80211/softmac/Kconfig"

1
net/ieee80211/Makefile
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@ -10,3 +10,4 @@ ieee80211-objs := \
ieee80211_wx.o \
ieee80211_geo.o
obj-$(CONFIG_IEEE80211_SOFTMAC) += softmac/

74
net/ieee80211/ieee80211_rx.c
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@ -780,6 +780,80 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
return 0;
}
/* Filter out unrelated packets, call ieee80211_rx[_mgt] */
int ieee80211_rx_any(struct ieee80211_device *ieee,
struct sk_buff *skb, struct ieee80211_rx_stats *stats)
{
struct ieee80211_hdr_4addr *hdr;
int is_packet_for_us;
u16 fc;
if (ieee->iw_mode == IW_MODE_MONITOR)
return ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL;
hdr = (struct ieee80211_hdr_4addr *)skb->data;
fc = le16_to_cpu(hdr->frame_ctl);
if ((fc & IEEE80211_FCTL_VERS) != 0)
return -EINVAL;
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_MGMT:
ieee80211_rx_mgt(ieee, hdr, stats);
return 0;
case IEEE80211_FTYPE_DATA:
break;
case IEEE80211_FTYPE_CTL:
return 0;
default:
return -EINVAL;
}
is_packet_for_us = 0;
switch (ieee->iw_mode) {
case IW_MODE_ADHOC:
/* our BSS and not from/to DS */
if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
/* promisc: get all */
if (ieee->dev->flags & IFF_PROMISC)
is_packet_for_us = 1;
/* to us */
else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
is_packet_for_us = 1;
/* mcast */
else if (is_multicast_ether_addr(hdr->addr1))
is_packet_for_us = 1;
}
break;
case IW_MODE_INFRA:
/* our BSS (== from our AP) and from DS */
if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
/* promisc: get all */
if (ieee->dev->flags & IFF_PROMISC)
is_packet_for_us = 1;
/* to us */
else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
is_packet_for_us = 1;
/* mcast */
else if (is_multicast_ether_addr(hdr->addr1)) {
/* not our own packet bcasted from AP */
if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
is_packet_for_us = 1;
}
}
break;
default:
/* ? */
break;
}
if (is_packet_for_us)
return (ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL);
return 0;
}
#define MGMT_FRAME_FIXED_PART_LENGTH 0x24
static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };

10
net/ieee80211/softmac/Kconfig Normal file
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@ -0,0 +1,10 @@
config IEEE80211_SOFTMAC
tristate "Software MAC add-on to the IEEE 802.11 networking stack"
depends on IEEE80211 && EXPERIMENTAL
---help---
This option enables the hardware independent software MAC addon
for the IEEE 802.11 networking stack.
config IEEE80211_SOFTMAC_DEBUG
bool "Enable full debugging output"
depends on IEEE80211_SOFTMAC

9
net/ieee80211/softmac/Makefile Normal file
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@ -0,0 +1,9 @@
obj-$(CONFIG_IEEE80211_SOFTMAC) += ieee80211softmac.o
ieee80211softmac-objs := \
ieee80211softmac_io.o \
ieee80211softmac_auth.o \
ieee80211softmac_module.o \
ieee80211softmac_scan.o \
ieee80211softmac_wx.o \
ieee80211softmac_assoc.o \
ieee80211softmac_event.o

403
net/ieee80211/softmac/ieee80211softmac_assoc.c Normal file
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@ -0,0 +1,403 @@
/*
* 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;
function_enter();
/* 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");
/* Change the state to associating */
spin_lock_irqsave(&mac->lock, flags);
mac->associnfo.associating = 1;
mac->associated = 0; /* just to make sure */
spin_unlock_irqrestore(&mac->lock, flags);
/* Set a timer for timeout */
/* FIXME: make timeout configurable */
schedule_delayed_work(&mac->associnfo.timeout, 5 * HZ);
}
void
ieee80211softmac_assoc_timeout(void *d)
{
struct ieee80211softmac_device *mac = (struct ieee80211softmac_device *)d;
unsigned long flags;
function_enter();
spin_lock_irqsave(&mac->lock, flags);
/* we might race against ieee80211softmac_handle_assoc_response,
* so make sure only one of us does something */
if (!mac->associnfo.associating) {
spin_unlock_irqrestore(&mac->lock, flags);
return;
}
mac->associnfo.associating = 0;
mac->associnfo.bssvalid = 0;
mac->associated = 0;
spin_unlock_irqrestore(&mac->lock, flags);
dprintk(KERN_INFO PFX "assoc request timed out!\n");
/* FIXME: we need to know the network here. that requires a bit of restructuring */
ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT, NULL);
}
/* Sends out a disassociation request to the desired AP */
static void
ieee80211softmac_disassoc(struct ieee80211softmac_device *mac, u16 reason)
{
unsigned long flags;
struct ieee80211softmac_network *found;
function_enter();
if (mac->associnfo.bssvalid && mac->associated) {
found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);
if (found)
ieee80211softmac_send_mgt_frame(mac, found, IEEE80211_STYPE_DISASSOC, reason);
} else if (mac->associnfo.associating) {
cancel_delayed_work(&mac->associnfo.timeout);
}
/* Change our state */
spin_lock_irqsave(&mac->lock, flags);
/* Do NOT clear bssvalid as that will break ieee80211softmac_assoc_work! */
mac->associated = 0;
mac->associnfo.associating = 0;
spin_unlock_irqrestore(&mac->lock, flags);
}
static inline int
we_support_all_basic_rates(struct ieee80211softmac_device *mac, u8 *from, u8 from_len)
{
int idx, search, found;
u8 rate, search_rate;
for (idx = 0; idx < (from_len); idx++) {
rate = (from)[idx];
if (!(rate & IEEE80211_BASIC_RATE_MASK))
continue;
found = 0;
rate &= ~IEEE80211_BASIC_RATE_MASK;
for (search = 0; search < mac->ratesinfo.count; search++) {
search_rate = mac->ratesinfo.rates[search];
search_rate &= ~IEEE80211_BASIC_RATE_MASK;
if (rate == search_rate) {
found = 1;
break;
}
}
if (!found)
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;
/* 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(struct net_device *dev, void *context)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
ieee80211softmac_assoc_work((void*)mac);
}
/* This function is called to handle userspace requests (asynchronously) */
void
ieee80211softmac_assoc_work(void *d)
{
struct ieee80211softmac_device *mac = (struct ieee80211softmac_device *)d;
struct ieee80211softmac_network *found = NULL;
struct ieee80211_network *net = NULL, *best = NULL;
unsigned long flags;
function_enter();
/* meh */
if (mac->associated)
ieee80211softmac_disassoc(mac, WLAN_REASON_DISASSOC_STA_HAS_LEFT);
/* try to find the requested network in our list, if we found one already */
if (mac->associnfo.bssvalid)
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) {
spin_lock_irqsave(&mac->lock, flags);
mac->associnfo.scan_retry--;
spin_unlock_irqrestore(&mac->lock, flags);
/* 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, NULL);
if (ieee80211softmac_start_scan(mac))
dprintk(KERN_INFO PFX "Associate: failed to initiate scan. Is device up?\n");
return;
}
else {
spin_lock_irqsave(&mac->lock, flags);
mac->associnfo.associating = 0;
mac->associated = 0;
spin_unlock_irqrestore(&mac->lock, flags);
dprintk(KERN_INFO PFX "Unable to find matching network after scan!\n");
ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND, NULL);
return;
}
}
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->authenticated) {
/* 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)) {
dprintk(KERN_INFO PFX "cannot associate without being authenticated, requested authentication\n");
ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify, NULL, GFP_KERNEL);
} else {
printkl(KERN_WARNING PFX "Not authenticated, but requesting authentication failed. Giving up to associate\n");
ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, found);
}
return;
}
/* finally! now we can start associating */
ieee80211softmac_assoc(mac, found);
}
/* 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)
{
mac->associnfo.associating = 0;
mac->associated = 1;
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_do_not_use)
{
/* NOTE: the network parameter has to be 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;
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 " MAC_FMT "\n", MAC_ARG(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);
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;
schedule_work(&mac->associnfo.work);
break;
}
default:
dprintk(KERN_INFO PFX "associating failed (reason: 0x%x)!\n", status);
mac->associnfo.associating = 0;
mac->associnfo.bssvalid = 0;
mac->associated = 0;
ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, network);
}
spin_unlock_irqrestore(&mac->lock, flags);
return 0;
}
int
ieee80211softmac_handle_disassoc(struct net_device * dev,
struct ieee80211_disassoc *disassoc)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
unsigned long flags;
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");
netif_carrier_off(dev);
spin_lock_irqsave(&mac->lock, flags);
mac->associnfo.bssvalid = 0;
mac->associated = 0;
schedule_work(&mac->associnfo.work);
spin_unlock_irqrestore(&mac->lock, flags);
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;
function_enter();
network = ieee80211softmac_get_network_by_bssid(mac, resp->header.addr3);
if (!network) {
dprintkl(KERN_INFO PFX "reassoc request from unknown network\n");
return 0;
}
ieee80211softmac_assoc(mac, network);
return 0;
}

376
net/ieee80211/softmac/ieee80211softmac_auth.c Normal file
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@ -0,0 +1,376 @@
/*
* This file contains the softmac's authentication 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"
static void ieee80211softmac_auth_queue(void *data);
/* Queues an auth request to the desired AP */
int
ieee80211softmac_auth_req(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net)
{
struct ieee80211softmac_auth_queue_item *auth;
unsigned long flags;
function_enter();
if (net->authenticating)
return 0;
/* Add the network if it's not already added */
ieee80211softmac_add_network(mac, net);
dprintk(KERN_NOTICE PFX "Queueing Authentication Request to "MAC_FMT"\n", MAC_ARG(net->bssid));
/* Queue the auth request */
auth = (struct ieee80211softmac_auth_queue_item *)
kmalloc(sizeof(struct ieee80211softmac_auth_queue_item), GFP_KERNEL);
if(auth == NULL)
return -ENOMEM;
auth->net = net;
auth->mac = mac;
auth->retry = IEEE80211SOFTMAC_AUTH_RETRY_LIMIT;
auth->state = IEEE80211SOFTMAC_AUTH_OPEN_REQUEST;
INIT_WORK(&auth->work, &ieee80211softmac_auth_queue, (void *)auth);
/* Lock (for list) */
spin_lock_irqsave(&mac->lock, flags);
/* add to list */
list_add_tail(&auth->list, &mac->auth_queue);
schedule_work(&auth->work);
spin_unlock_irqrestore(&mac->lock, flags);
return 0;
}
/* Sends an auth request to the desired AP and handles timeouts */
static void
ieee80211softmac_auth_queue(void *data)
{
struct ieee80211softmac_device *mac;
struct ieee80211softmac_auth_queue_item *auth;
struct ieee80211softmac_network *net;
unsigned long flags;
function_enter();
auth = (struct ieee80211softmac_auth_queue_item *)data;
net = auth->net;
mac = auth->mac;
if(auth->retry > 0) {
/* Switch to correct channel for this network */
mac->set_channel(mac->dev, net->channel);
/* Lock and set flags */
spin_lock_irqsave(&mac->lock, flags);
net->authenticated = 0;
net->authenticating = 1;
/* add a timeout call so we eventually give up waiting for an auth reply */
schedule_delayed_work(&auth->work, IEEE80211SOFTMAC_AUTH_TIMEOUT);
auth->retry--;
spin_unlock_irqrestore(&mac->lock, flags);
if (ieee80211softmac_send_mgt_frame(mac, auth->net, IEEE80211_STYPE_AUTH, auth->state))
dprintk(KERN_NOTICE PFX "Sending Authentication Request to "MAC_FMT" failed (this shouldn't happen, wait for the timeout).\n", MAC_ARG(net->bssid));
else
dprintk(KERN_NOTICE PFX "Sent Authentication Request to "MAC_FMT".\n", MAC_ARG(net->bssid));
return;
}
printkl(KERN_WARNING PFX "Authentication timed out with "MAC_FMT"\n", MAC_ARG(net->bssid));
/* Remove this item from the queue */
spin_lock_irqsave(&mac->lock, flags);
ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT, net);
cancel_delayed_work(&auth->work); /* just to make sure... */
list_del(&auth->list);
spin_unlock_irqrestore(&mac->lock, flags);
/* Free it */
kfree(auth);
}
/* Handle the auth response from the AP
* This should be registered with ieee80211 as handle_auth
*/
int
ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth)
{
struct list_head *list_ptr;
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
struct ieee80211softmac_auth_queue_item *aq = NULL;
struct ieee80211softmac_network *net = NULL;
unsigned long flags;
u8 * data;
function_enter();
/* Find correct auth queue item */
spin_lock_irqsave(&mac->lock, flags);
list_for_each(list_ptr, &mac->auth_queue) {
aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
net = aq->net;
if (!memcmp(net->bssid, auth->header.addr2, ETH_ALEN))
break;
else
aq = NULL;
}
spin_unlock_irqrestore(&mac->lock, flags);
/* Make sure that we've got an auth queue item for this request */
if(aq == NULL)
{
printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but no queue item exists.\n", MAC_ARG(auth->header.addr2));
/* Error #? */
return -1;
}
/* Check for out of order authentication */
if(!net->authenticating)
{
printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but did not request authentication.\n",MAC_ARG(auth->header.addr2));
return -1;
}
/* Parse the auth packet */
switch(auth->algorithm) {
case WLAN_AUTH_OPEN:
/* Check the status code of the response */
switch(auth->status) {
case WLAN_STATUS_SUCCESS:
/* Update the status to Authenticated */
spin_lock_irqsave(&mac->lock, flags);
net->authenticating = 0;
net->authenticated = 1;
spin_unlock_irqrestore(&mac->lock, flags);
/* Send event */
printkl(KERN_NOTICE PFX "Open Authentication completed with "MAC_FMT"\n", MAC_ARG(net->bssid));
ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
break;
default:
/* Lock and reset flags */
spin_lock_irqsave(&mac->lock, flags);
net->authenticated = 0;
net->authenticating = 0;
spin_unlock_irqrestore(&mac->lock, flags);
printkl(KERN_NOTICE PFX "Open Authentication with "MAC_FMT" failed, error code: %i\n",
MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
/* Count the error? */
break;
}
goto free_aq;
break;
case WLAN_AUTH_SHARED_KEY:
/* Figure out where we are in the process */
switch(auth->transaction) {
case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
/* Check to make sure we have a challenge IE */
data = (u8 *)auth->info_element;
if(*data++ != MFIE_TYPE_CHALLENGE){
printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n");
break;
}
/* Save the challenge */
spin_lock_irqsave(&mac->lock, flags);
net->challenge_len = *data++;
if(net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
if(net->challenge != NULL)
kfree(net->challenge);
net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC);
memcpy(net->challenge, data, net->challenge_len);
aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE;
spin_unlock_irqrestore(&mac->lock, flags);
/* Switch to correct channel for this network */
mac->set_channel(mac->dev, net->channel);
/* Send our response (How to encrypt?) */
ieee80211softmac_send_mgt_frame(mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
break;
case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
/* Check the status code of the response */
switch(auth->status) {
case WLAN_STATUS_SUCCESS:
/* Update the status to Authenticated */
spin_lock_irqsave(&mac->lock, flags);
net->authenticating = 0;
net->authenticated = 1;
spin_unlock_irqrestore(&mac->lock, flags);
printkl(KERN_NOTICE PFX "Shared Key Authentication completed with "MAC_FMT"\n",
MAC_ARG(net->bssid));
break;
default:
printkl(KERN_NOTICE PFX "Shared Key Authentication with "MAC_FMT" failed, error code: %i\n",
MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
/* Lock and reset flags */
spin_lock_irqsave(&mac->lock, flags);
net->authenticating = 0;
net->authenticated = 0;
spin_unlock_irqrestore(&mac->lock, flags);
/* Count the error? */
break;
}
goto free_aq;
break;
default:
printkl(KERN_WARNING PFX "Unhandled Authentication Step: %i\n", auth->transaction);
break;
}
goto free_aq;
break;
default:
/* ERROR */
goto free_aq;
break;
}
return 0;
free_aq:
/* Cancel the timeout */
spin_lock_irqsave(&mac->lock, flags);
cancel_delayed_work(&aq->work);
/* Remove this item from the queue */
list_del(&aq->list);
spin_unlock_irqrestore(&mac->lock, flags);
/* Free it */
kfree(aq);
return 0;
}
/*
* Handle deauthorization
*/
static void
ieee80211softmac_deauth_from_net(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net)
{
struct ieee80211softmac_auth_queue_item *aq = NULL;
struct list_head *list_ptr;
unsigned long flags;
function_enter();
/* Lock and reset status flags */
spin_lock_irqsave(&mac->lock, flags);
net->authenticating = 0;
net->authenticated = 0;
/* Find correct auth queue item, if it exists */
list_for_each(list_ptr, &mac->auth_queue) {
aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
if (!memcmp(net->bssid, aq->net->bssid, ETH_ALEN))
break;
else
aq = NULL;
}
/* Cancel pending work */
if(aq != NULL)
/* Not entirely safe? What about running work? */
cancel_delayed_work(&aq->work);
/* Free our network ref */
ieee80211softmac_del_network_locked(mac, net);
if(net->challenge != NULL)
kfree(net->challenge);
kfree(net);
/* can't transmit data right now... */
netif_carrier_off(mac->dev);
/* let's try to re-associate */
schedule_work(&mac->associnfo.work);
spin_unlock_irqrestore(&mac->lock, flags);
}
/*
* Sends a deauth request to the desired AP
*/
int
ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net, int reason)
{
int ret;
function_enter();
/* Make sure the network is authenticated */
if (!net->authenticated)
{
printkl(KERN_DEBUG PFX "Can't send deauthentication packet, network is not authenticated.\n");
/* Error okay? */
return -EPERM;
}
/* Send the de-auth packet */
if((ret = ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_DEAUTH, reason)))
return ret;
ieee80211softmac_deauth_from_net(mac, net);
return 0;
}
/*
* This should be registered with ieee80211 as handle_deauth
*/
int
ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_deauth *deauth)
{
struct ieee80211softmac_network *net = NULL;
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
function_enter();
if (!deauth) {
dprintk("deauth without deauth packet. eek!\n");
return 0;
}
net = ieee80211softmac_get_network_by_bssid(mac, deauth->header.addr2);
if (net == NULL) {
printkl(KERN_DEBUG PFX "Received deauthentication packet from "MAC_FMT", but that network is unknown.\n",
MAC_ARG(deauth->header.addr2));
return 0;
}
/* Make sure the network is authenticated */
if(!net->authenticated)
{
printkl(KERN_DEBUG PFX "Can't perform deauthentication, network is not authenticated.\n");
/* Error okay? */
return -EPERM;
}
ieee80211softmac_deauth_from_net(mac, net);
return 0;
}

159
net/ieee80211/softmac/ieee80211softmac_event.c Normal file
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@ -0,0 +1,159 @@
/*
* Event system
* Also see comments in public header file and longer explanation below.
*
* 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"
/*
* Each event has associated to it
* - an event type (see constants in public header)
* - an event context (see below)
* - the function to be called
* - a context (extra parameter to call the function with)
* - and the softmac struct
*
* The event context is private and can only be used from
* within this module. Its meaning varies with the event
* type:
* SCAN_FINISHED: no special meaning
* ASSOCIATED,
* ASSOCIATE_FAILED,
* ASSOCIATE_TIMEOUT,
* AUTHENTICATED,
* AUTH_FAILED,
* AUTH_TIMEOUT: a pointer to the network struct
* ...
* Code within this module can use the event context to be only
* called when the event is true for that specific context
* as per above table.
* If the event context is NULL, then the notification is always called,
* regardless of the event context. The event context is not passed to
* the callback, it is assumed that the context suffices.
*
* You can also use the event context only by setting the event type
* to -1 (private use only), in which case you'll be notified
* whenever the event context matches.
*/
static char *event_descriptions[IEEE80211SOFTMAC_EVENT_LAST+1] = {
"scan finished",
"associated",
"associating failed",
"associating timed out",
"authenticated",
"authenticating failed",
"authenticating timed out",
"associating failed because no suitable network was found",
};
static void
ieee80211softmac_notify_callback(void *d)
{
struct ieee80211softmac_event event = *(struct ieee80211softmac_event*) d;
kfree(d);
event.fun(event.mac->dev, event.context);
}
int
ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac,
int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask)
{
struct ieee80211softmac_event *eventptr;
unsigned long flags;
if (event < -1 || event > IEEE80211SOFTMAC_EVENT_LAST)
return -ENOSYS;
if (!fun)
return -EINVAL;
eventptr = kmalloc(sizeof(struct ieee80211softmac_event), gfp_mask);
if (!eventptr)
return -ENOMEM;
eventptr->event_type = event;
INIT_WORK(&eventptr->work, ieee80211softmac_notify_callback, eventptr);
eventptr->fun = fun;
eventptr->context = context;
eventptr->mac = mac;
eventptr->event_context = event_context;
spin_lock_irqsave(&mac->lock, flags);
list_add(&eventptr->list, &mac->events);
spin_unlock_irqrestore(&mac->lock, flags);
return 0;
}
int
ieee80211softmac_notify_gfp(struct net_device *dev,
int event, notify_function_ptr fun, void *context, gfp_t gfp_mask)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
if (event < 0 || event > IEEE80211SOFTMAC_EVENT_LAST)
return -ENOSYS;
return ieee80211softmac_notify_internal(mac, event, NULL, fun, context, gfp_mask);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_notify_gfp);
/* private -- calling all callbacks that were specified */
void
ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_ctx)
{
struct ieee80211softmac_event *eventptr, *tmp;
union iwreq_data wrqu;
char *msg;
if (event >= 0) {
msg = event_descriptions[event];
wrqu.data.length = strlen(msg);
wireless_send_event(mac->dev, IWEVCUSTOM, &wrqu, msg);
}
if (!list_empty(&mac->events))
list_for_each_entry_safe(eventptr, tmp, &mac->events, list) {
if ((eventptr->event_type == event || eventptr->event_type == -1)
&& (eventptr->event_context == NULL || eventptr->event_context == event_ctx)) {
list_del(&eventptr->list);
schedule_work(&eventptr->work);
}
}
}
void
ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_ctx)
{
unsigned long flags;
spin_lock_irqsave(&mac->lock, flags);
ieee80211softmac_call_events_locked(mac, event, event_ctx);
spin_unlock_irqrestore(&mac->lock, flags);
}

474
net/ieee80211/softmac/ieee80211softmac_io.c Normal file
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/*
* Some parts based on code from net80211
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "ieee80211softmac_priv.h"
/* Helper functions for inserting data into the frames */
/*
* Adds an ESSID element to the frame
*
*/
static u8 *
ieee80211softmac_add_essid(u8 *dst, struct ieee80211softmac_essid *essid)
{
if (essid) {
*dst++ = MFIE_TYPE_SSID;
*dst++ = essid->len;
memcpy(dst, essid->data, essid->len);
return dst+essid->len;
} else {
*dst++ = MFIE_TYPE_SSID;
*dst++ = 0;
return dst;
}
}
/* Adds Supported Rates and if required Extended Rates Information Element
* to the frame, ASSUMES WE HAVE A SORTED LIST OF RATES */
static u8 *
ieee80211softmac_frame_add_rates(u8 *dst, const struct ieee80211softmac_ratesinfo *r)
{
int cck_len, ofdm_len;
*dst++ = MFIE_TYPE_RATES;
for(cck_len=0; ieee80211_is_cck_rate(r->rates[cck_len]) && (cck_len < r->count);cck_len++);
if(cck_len > IEEE80211SOFTMAC_MAX_RATES_LEN)
cck_len = IEEE80211SOFTMAC_MAX_RATES_LEN;
*dst++ = cck_len;
memcpy(dst, r->rates, cck_len);
dst += cck_len;
if(cck_len < r->count){
for (ofdm_len=0; ieee80211_is_ofdm_rate(r->rates[ofdm_len + cck_len]) && (ofdm_len + cck_len < r->count); ofdm_len++);
if (ofdm_len > 0) {
if (ofdm_len > IEEE80211SOFTMAC_MAX_EX_RATES_LEN)
ofdm_len = IEEE80211SOFTMAC_MAX_EX_RATES_LEN;
*dst++ = MFIE_TYPE_RATES_EX;
*dst++ = ofdm_len;
memcpy(dst, r->rates + cck_len, ofdm_len);
dst += ofdm_len;
}
}
return dst;
}
/* Allocate a management frame */
static u8 *
ieee80211softmac_alloc_mgt(u32 size)
{
u8 * data;
/* Add the header and FCS to the size */
size = size + IEEE80211_3ADDR_LEN;
if(size > IEEE80211_DATA_LEN)
return NULL;
/* Allocate the frame */
data = kmalloc(size, GFP_ATOMIC);
memset(data, 0, size);
return data;
}
/*
* Add a 2 Address Header
*/
static void
ieee80211softmac_hdr_2addr(struct ieee80211softmac_device *mac,
struct ieee80211_hdr_2addr *header, u32 type, u8 *dest)
{
/* Fill in the frame control flags */
header->frame_ctl = cpu_to_le16(type);
/* Control packets always have WEP turned off */
if(type > IEEE80211_STYPE_CFENDACK && type < IEEE80211_STYPE_PSPOLL)
header->frame_ctl |= mac->ieee->sec.level ? cpu_to_le16(IEEE80211_FCTL_PROTECTED) : 0;
/* Fill in the duration */
header->duration_id = 0;
/* FIXME: How do I find this?
* calculate. But most drivers just fill in 0 (except if it's a station id of course) */
/* Fill in the Destination Address */
if(dest == NULL)
memset(header->addr1, 0xFF, ETH_ALEN);
else
memcpy(header->addr1, dest, ETH_ALEN);
/* Fill in the Source Address */
memcpy(header->addr2, mac->ieee->dev->dev_addr, ETH_ALEN);
}
/* Add a 3 Address Header */
static void
ieee80211softmac_hdr_3addr(struct ieee80211softmac_device *mac,
struct ieee80211_hdr_3addr *header, u32 type, u8 *dest, u8 *bssid)
{
/* This is common with 2addr, so use that instead */
ieee80211softmac_hdr_2addr(mac, (struct ieee80211_hdr_2addr *)header, type, dest);
/* Fill in the BSS ID */
if(bssid == NULL)
memset(header->addr3, 0xFF, ETH_ALEN);
else
memcpy(header->addr3, bssid, ETH_ALEN);
/* Fill in the sequence # */
/* FIXME: I need to add this to the softmac struct
* shouldn't the sequence number be in ieee80211? */
}
/*****************************************************************************
* Create Management packets
*****************************************************************************/
/* Creates an association request packet */
static u32
ieee80211softmac_assoc_req(struct ieee80211_assoc_request **pkt,
struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
{
u8 *data;
(*pkt) = (struct ieee80211_assoc_request *)ieee80211softmac_alloc_mgt(
2 + /* Capability Info */
2 + /* Listen Interval */
/* SSID IE */
1 + 1 + IW_ESSID_MAX_SIZE +
/* Rates IE */
1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
/* Extended Rates IE */
1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN +
/* WPA IE if present */
mac->wpa.IElen
/* Other IE's? Optional?
* Yeah, probably need an extra IE parameter -- lots of vendors like to
* fill in their own IEs */
);
if (unlikely((*pkt) == NULL))
return 0;
ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_ASSOC_REQ, net->bssid, net->bssid);
/* Fill in capability Info */
(*pkt)->capability = (mac->ieee->iw_mode == IW_MODE_MASTER) || (mac->ieee->iw_mode == IW_MODE_INFRA) ?
cpu_to_le16(WLAN_CAPABILITY_ESS) :
cpu_to_le16(WLAN_CAPABILITY_IBSS);
/* Need to add this
(*pkt)->capability |= mac->ieee->short_slot ?
cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0;
*/
(*pkt)->capability |= mac->ieee->sec.level ? cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0;
/* Fill in Listen Interval (?) */
(*pkt)->listen_interval = cpu_to_le16(10);
data = (u8 *)(*pkt)->info_element;
/* Add SSID */
data = ieee80211softmac_add_essid(data, &net->essid);
/* Add Rates */
data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
/* Add WPA IE */
if (mac->wpa.IElen && mac->wpa.IE) {
memcpy(data, mac->wpa.IE, mac->wpa.IElen);
data += mac->wpa.IElen;
}
/* Return the number of used bytes */
return (data - (u8*)(*pkt));
}
/* Create a reassociation request packet */
static u32
ieee80211softmac_reassoc_req(struct ieee80211_reassoc_request **pkt,
struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
{
u8 *data;
(*pkt) = (struct ieee80211_reassoc_request *)ieee80211softmac_alloc_mgt(
2 + /* Capability Info */
2 + /* Listen Interval */
ETH_ALEN + /* AP MAC */
/* SSID IE */
1 + 1 + IW_ESSID_MAX_SIZE +
/* Rates IE */
1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
/* Extended Rates IE */
1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN
/* Other IE's? */
);
if (unlikely((*pkt) == NULL))
return 0;
ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_REASSOC_REQ, net->bssid, net->bssid);
/* Fill in capability Info */
(*pkt)->capability = mac->ieee->iw_mode == IW_MODE_MASTER ?
cpu_to_le16(WLAN_CAPABILITY_ESS) :
cpu_to_le16(WLAN_CAPABILITY_IBSS);
/*
(*pkt)->capability |= mac->ieee->short_slot ?
cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0;
*/
(*pkt)->capability |= mac->ieee->sec.level ?
cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0;
/* Fill in Listen Interval (?) */
(*pkt)->listen_interval = cpu_to_le16(10);
/* Fill in the current AP MAC */
memcpy((*pkt)->current_ap, mac->ieee->bssid, ETH_ALEN);
data = (u8 *)(*pkt)->info_element;
/* Add SSID */
data = ieee80211softmac_add_essid(data, &net->essid);
/* Add Rates */
data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
/* Return packet size */
return (data - (u8 *)(*pkt));
}
/* Create an authentication packet */
static u32
ieee80211softmac_auth(struct ieee80211_auth **pkt,
struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net,
u16 transaction, u16 status)
{
u8 *data;
/* Allocate Packet */
(*pkt) = (struct ieee80211_auth *)ieee80211softmac_alloc_mgt(
2 + /* Auth Algorithm */
2 + /* Auth Transaction Seq */
2 + /* Status Code */
/* Challenge Text IE */
mac->ieee->open_wep ? 0 :
1 + 1 + WLAN_AUTH_CHALLENGE_LEN
);
if (unlikely((*pkt) == NULL))
return 0;
ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_AUTH, net->bssid, net->bssid);
/* Algorithm */
(*pkt)->algorithm = mac->ieee->open_wep ?
cpu_to_le16(WLAN_AUTH_OPEN) :
cpu_to_le16(WLAN_AUTH_SHARED_KEY);
/* Transaction */
(*pkt)->transaction = cpu_to_le16(transaction);
/* Status */
(*pkt)->status = cpu_to_le16(status);
data = (u8 *)(*pkt)->info_element;
/* Challenge Text */
if(!mac->ieee->open_wep){
*data = MFIE_TYPE_CHALLENGE;
data++;
/* Copy the challenge in */
// *data = challenge length
// data += sizeof(u16);
// memcpy(data, challenge, challenge length);
// data += challenge length;
/* Add the full size to the packet length */
}
/* Return the packet size */
return (data - (u8 *)(*pkt));
}
/* Create a disassocation or deauthentication packet */
static u32
ieee80211softmac_disassoc_deauth(struct ieee80211_disassoc **pkt,
struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net,
u16 type, u16 reason)
{
/* Allocate Packet */
(*pkt) = (struct ieee80211_disassoc *)ieee80211softmac_alloc_mgt(2);
if (unlikely((*pkt) == NULL))
return 0;
ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), type, net->bssid, net->bssid);
/* Reason */
(*pkt)->reason = cpu_to_le16(reason);
/* Return the packet size */
return (2 + IEEE80211_3ADDR_LEN);
}
/* Create a probe request packet */
static u32
ieee80211softmac_probe_req(struct ieee80211_probe_request **pkt,
struct ieee80211softmac_device *mac, struct ieee80211softmac_essid *essid)
{
u8 *data;
/* Allocate Packet */
(*pkt) = (struct ieee80211_probe_request *)ieee80211softmac_alloc_mgt(
/* SSID of requested network */
1 + 1 + IW_ESSID_MAX_SIZE +
/* Rates IE */
1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN +
/* Extended Rates IE */
1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN
);
if (unlikely((*pkt) == NULL))
return 0;
ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_REQ, NULL, NULL);
data = (u8 *)(*pkt)->info_element;
/* Add ESSID (can be NULL) */
data = ieee80211softmac_add_essid(data, essid);
/* Add Rates */
data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo);
/* Return packet size */
return (data - (u8 *)(*pkt));
}
/* Create a probe response packet */
/* FIXME: Not complete */
static u32
ieee80211softmac_probe_resp(struct ieee80211_probe_response **pkt,
struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
{
u8 *data;
/* Allocate Packet */
(*pkt) = (struct ieee80211_probe_response *)ieee80211softmac_alloc_mgt(
8 + /* Timestamp */
2 + /* Beacon Interval */
2 + /* Capability Info */
/* SSID IE */
1 + 1 + IW_ESSID_MAX_SIZE +
7 + /* FH Parameter Set */
2 + /* DS Parameter Set */
8 + /* CF Parameter Set */
4 /* IBSS Parameter Set */
);
if (unlikely((*pkt) == NULL))
return 0;
ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_RESP, net->bssid, net->bssid);
data = (u8 *)(*pkt)->info_element;
/* Return the packet size */
return (data - (u8 *)(*pkt));
}
/* Sends a manangement packet
* FIXME: document the use of the arg parameter
* for _AUTH: (transaction #) | (status << 16)
*/
int
ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac,
void *ptrarg, u32 type, u32 arg)
{
void *pkt = NULL;
u32 pkt_size = 0;
switch(type) {
case IEEE80211_STYPE_ASSOC_REQ:
pkt_size = ieee80211softmac_assoc_req((struct ieee80211_assoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg);
break;
case IEEE80211_STYPE_REASSOC_REQ:
pkt_size = ieee80211softmac_reassoc_req((struct ieee80211_reassoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg);
break;
case IEEE80211_STYPE_AUTH:
pkt_size = ieee80211softmac_auth((struct ieee80211_auth **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, (u16)(arg & 0xFFFF), (u16) (arg >> 16));
break;
case IEEE80211_STYPE_DISASSOC:
case IEEE80211_STYPE_DEAUTH:
pkt_size = ieee80211softmac_disassoc_deauth((struct ieee80211_disassoc **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, type, (u16)(arg & 0xFFFF));
break;
case IEEE80211_STYPE_PROBE_REQ:
pkt_size = ieee80211softmac_probe_req((struct ieee80211_probe_request **)(&pkt), mac, (struct ieee80211softmac_essid *)ptrarg);
break;
case IEEE80211_STYPE_PROBE_RESP:
pkt_size = ieee80211softmac_probe_resp((struct ieee80211_probe_response **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg);
break;
default:
printkl(KERN_DEBUG PFX "Unsupported Management Frame type: %i\n", type);
return -EINVAL;
};
if(pkt_size == 0 || pkt == NULL) {
printkl(KERN_DEBUG PFX "Error, packet is nonexistant or 0 length\n");
return -ENOMEM;
}
/* Send the packet to the ieee80211 layer for tx */
/* we defined softmac->mgmt_xmit for this. Should we keep it
* as it is (that means we'd need to wrap this into a txb),
* modify the prototype (so it matches this function),
* or get rid of it alltogether?
* Does this work for you now?
*/
ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *)pkt, pkt_size);
kfree(pkt);
return 0;
}
/* Create an rts/cts frame */
static u32
ieee80211softmac_rts_cts(struct ieee80211_hdr_2addr **pkt,
struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net,
u32 type)
{
/* Allocate Packet */
(*pkt) = kmalloc(IEEE80211_2ADDR_LEN, GFP_ATOMIC);
memset(*pkt, 0, IEEE80211_2ADDR_LEN);
if((*pkt) == NULL)
return 0;
ieee80211softmac_hdr_2addr(mac, (*pkt), type, net->bssid);
return IEEE80211_2ADDR_LEN;
}
/* Sends a control packet */
static int
ieee80211softmac_send_ctl_frame(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net, u32 type, u32 arg)
{
void *pkt = NULL;
u32 pkt_size = 0;
switch(type) {
case IEEE80211_STYPE_RTS:
case IEEE80211_STYPE_CTS:
pkt_size = ieee80211softmac_rts_cts((struct ieee80211_hdr_2addr **)(&pkt), mac, net, type);
break;
default:
printkl(KERN_DEBUG PFX "Unsupported Control Frame type: %i\n", type);
return -EINVAL;
}
if(pkt_size == 0)
return -ENOMEM;
/* Send the packet to the ieee80211 layer for tx */
ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *) pkt, pkt_size);
kfree(pkt);
return 0;
}

457
net/ieee80211/softmac/ieee80211softmac_module.c Normal file
View File

@ -0,0 +1,457 @@
/*
* Contains some basic softmac functions along with module registration code etc.
*
* 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"
#include <linux/sort.h>
struct net_device *alloc_ieee80211softmac(int sizeof_priv)
{
struct ieee80211softmac_device *softmac;
struct net_device *dev;
dev = alloc_ieee80211(sizeof(struct ieee80211softmac_device) + sizeof_priv);
softmac = ieee80211_priv(dev);
softmac->dev = dev;
softmac->ieee = netdev_priv(dev);
spin_lock_init(&softmac->lock);
softmac->ieee->handle_auth = ieee80211softmac_auth_resp;
softmac->ieee->handle_deauth = ieee80211softmac_deauth_resp;
softmac->ieee->handle_assoc_response = ieee80211softmac_handle_assoc_response;
softmac->ieee->handle_reassoc_request = ieee80211softmac_handle_reassoc_req;
softmac->ieee->handle_disassoc = ieee80211softmac_handle_disassoc;
softmac->scaninfo = NULL;
/* TODO: initialise all the other callbacks in the ieee struct
* (once they're written)
*/
INIT_LIST_HEAD(&softmac->auth_queue);
INIT_LIST_HEAD(&softmac->network_list);
INIT_LIST_HEAD(&softmac->events);
INIT_WORK(&softmac->associnfo.work, ieee80211softmac_assoc_work, softmac);
INIT_WORK(&softmac->associnfo.timeout, ieee80211softmac_assoc_timeout, softmac);
softmac->start_scan = ieee80211softmac_start_scan_implementation;
softmac->wait_for_scan = ieee80211softmac_wait_for_scan_implementation;
softmac->stop_scan = ieee80211softmac_stop_scan_implementation;
//TODO: The mcast rate has to be assigned dynamically somewhere (in scanning, association. Not sure...)
// It has to be set to the highest rate all stations in the current network can handle.
softmac->txrates.mcast_rate = IEEE80211_CCK_RATE_1MB;
softmac->txrates.mcast_fallback = IEEE80211_CCK_RATE_1MB;
/* This is reassigned in ieee80211softmac_start to sane values. */
softmac->txrates.default_rate = IEEE80211_CCK_RATE_1MB;
softmac->txrates.default_fallback = IEEE80211_CCK_RATE_1MB;
/* to start with, we can't send anything ... */
netif_carrier_off(dev);
return dev;
}
EXPORT_SYMBOL_GPL(alloc_ieee80211softmac);
/* Clears the pending work queue items, stops all scans, etc. */
void
ieee80211softmac_clear_pending_work(struct ieee80211softmac_device *sm)
{
unsigned long flags;
struct ieee80211softmac_event *eventptr, *eventtmp;
struct ieee80211softmac_auth_queue_item *authptr, *authtmp;
struct ieee80211softmac_network *netptr, *nettmp;
ieee80211softmac_stop_scan(sm);
ieee80211softmac_wait_for_scan(sm);
spin_lock_irqsave(&sm->lock, flags);
/* Free all pending assoc work items */
cancel_delayed_work(&sm->associnfo.work);
/* Free all pending scan work items */
if(sm->scaninfo != NULL)
cancel_delayed_work(&sm->scaninfo->softmac_scan);
/* Free all pending auth work items */
list_for_each_entry(authptr, &sm->auth_queue, list)
cancel_delayed_work(&authptr->work);
/* delete all pending event calls and work items */
list_for_each_entry_safe(eventptr, eventtmp, &sm->events, list)
cancel_delayed_work(&eventptr->work);
spin_unlock_irqrestore(&sm->lock, flags);
flush_scheduled_work();
/* now we should be save and no longer need locking... */
spin_lock_irqsave(&sm->lock, flags);
/* Free all pending auth work items */
list_for_each_entry_safe(authptr, authtmp, &sm->auth_queue, list) {
list_del(&authptr->list);
kfree(authptr);
}
/* delete all pending event calls and work items */
list_for_each_entry_safe(eventptr, eventtmp, &sm->events, list) {
list_del(&eventptr->list);
kfree(eventptr);
}
/* Free all networks */
list_for_each_entry_safe(netptr, nettmp, &sm->network_list, list) {
ieee80211softmac_del_network_locked(sm, netptr);
if(netptr->challenge != NULL)
kfree(netptr->challenge);
kfree(netptr);
}
spin_unlock_irqrestore(&sm->lock, flags);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_clear_pending_work);
void free_ieee80211softmac(struct net_device *dev)
{
struct ieee80211softmac_device *sm = ieee80211_priv(dev);
ieee80211softmac_clear_pending_work(sm);
kfree(sm->scaninfo);
kfree(sm->wpa.IE);
free_ieee80211(dev);
}
EXPORT_SYMBOL_GPL(free_ieee80211softmac);
static void ieee80211softmac_start_check_rates(struct ieee80211softmac_device *mac)
{
struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo;
/* I took out the sorting check, we're seperating by modulation now. */
if (ri->count)
return;
/* otherwise assume we hav'em all! */
if (mac->ieee->modulation & IEEE80211_CCK_MODULATION) {
ri->rates[ri->count++] = IEEE80211_CCK_RATE_1MB;
ri->rates[ri->count++] = IEEE80211_CCK_RATE_2MB;
ri->rates[ri->count++] = IEEE80211_CCK_RATE_5MB;
ri->rates[ri->count++] = IEEE80211_CCK_RATE_11MB;
}
if (mac->ieee->modulation & IEEE80211_OFDM_MODULATION) {
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_6MB;
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_9MB;
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_12MB;
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_18MB;
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_24MB;
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_36MB;
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_48MB;
ri->rates[ri->count++] = IEEE80211_OFDM_RATE_54MB;
}
}
void ieee80211softmac_start(struct net_device *dev)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
struct ieee80211_device *ieee = mac->ieee;
u32 change = 0;
struct ieee80211softmac_txrates oldrates;
ieee80211softmac_start_check_rates(mac);
/* TODO: We need some kind of state machine to lower the default rates
* if we loose too many packets.
*/
/* Change the default txrate to the highest possible value.
* The txrate machine will lower it, if it is too high.
*/
if (mac->txrates_change)
oldrates = mac->txrates;
if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
mac->txrates.default_rate = IEEE80211_OFDM_RATE_54MB;
change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
mac->txrates.default_fallback = IEEE80211_OFDM_RATE_24MB;
change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
} else if (ieee->modulation & IEEE80211_CCK_MODULATION) {
mac->txrates.default_rate = IEEE80211_CCK_RATE_11MB;
change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
mac->txrates.default_fallback = IEEE80211_CCK_RATE_5MB;
change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
} else
assert(0);
if (mac->txrates_change)
mac->txrates_change(dev, change, &oldrates);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_start);
void ieee80211softmac_stop(struct net_device *dev)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
ieee80211softmac_clear_pending_work(mac);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_stop);
void ieee80211softmac_set_rates(struct net_device *dev, u8 count, u8 *rates)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
unsigned long flags;
spin_lock_irqsave(&mac->lock, flags);
memcpy(mac->ratesinfo.rates, rates, count);
mac->ratesinfo.count = count;
spin_unlock_irqrestore(&mac->lock, flags);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_set_rates);
static u8 raise_rate(struct ieee80211softmac_device *mac, u8 rate)
{
int i;
struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo;
for (i=0; i<ri->count-1; i++) {
if (ri->rates[i] == rate)
return ri->rates[i+1];
}
/* I guess we can't go any higher... */
return ri->rates[ri->count];
}
u8 ieee80211softmac_lower_rate_delta(struct ieee80211softmac_device *mac, u8 rate, int delta)
{
int i;
struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo;
for (i=delta; i<ri->count; i++) {
if (ri->rates[i] == rate)
return ri->rates[i-delta];
}
/* I guess we can't go any lower... */
return ri->rates[0];
}
static void ieee80211softmac_add_txrates_badness(struct ieee80211softmac_device *mac,
int amount)
{
struct ieee80211softmac_txrates oldrates;
u8 default_rate = mac->txrates.default_rate;
u8 default_fallback = mac->txrates.default_fallback;
u32 changes = 0;
//TODO: This is highly experimental code.
// Maybe the dynamic rate selection does not work
// and it has to be removed again.
printk("badness %d\n", mac->txrate_badness);
mac->txrate_badness += amount;
if (mac->txrate_badness <= -1000) {
/* Very small badness. Try a faster bitrate. */
if (mac->txrates_change)
memcpy(&oldrates, &mac->txrates, sizeof(oldrates));
default_rate = raise_rate(mac, default_rate);
changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
default_fallback = get_fallback_rate(mac, default_rate);
changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
mac->txrate_badness = 0;
printk("Bitrate raised to %u\n", default_rate);
} else if (mac->txrate_badness >= 10000) {
/* Very high badness. Try a slower bitrate. */
if (mac->txrates_change)
memcpy(&oldrates, &mac->txrates, sizeof(oldrates));
default_rate = lower_rate(mac, default_rate);
changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
default_fallback = get_fallback_rate(mac, default_rate);
changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
mac->txrate_badness = 0;
printk("Bitrate lowered to %u\n", default_rate);
}
mac->txrates.default_rate = default_rate;
mac->txrates.default_fallback = default_fallback;
if (changes && mac->txrates_change)
mac->txrates_change(mac->dev, changes, &oldrates);
}
void ieee80211softmac_fragment_lost(struct net_device *dev,
u16 wl_seq)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
unsigned long flags;
spin_lock_irqsave(&mac->lock, flags);
ieee80211softmac_add_txrates_badness(mac, 1000);
//TODO
spin_unlock_irqrestore(&mac->lock, flags);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_fragment_lost);
static int rate_cmp(const void *a_, const void *b_) {
u8 *a, *b;
a = (u8*)a_;
b = (u8*)b_;
return ((*a & ~IEEE80211_BASIC_RATE_MASK) - (*b & ~IEEE80211_BASIC_RATE_MASK));
}
/* Allocate a softmac network struct and fill it from a network */
struct ieee80211softmac_network *
ieee80211softmac_create_network(struct ieee80211softmac_device *mac,
struct ieee80211_network *net)
{
struct ieee80211softmac_network *softnet;
softnet = kzalloc(sizeof(struct ieee80211softmac_network), GFP_ATOMIC);
if(softnet == NULL)
return NULL;
memcpy(softnet->bssid, net->bssid, ETH_ALEN);
softnet->channel = net->channel;
softnet->essid.len = net->ssid_len;
memcpy(softnet->essid.data, net->ssid, softnet->essid.len);
/* copy rates over */
softnet->supported_rates.count = net->rates_len;
memcpy(&softnet->supported_rates.rates[0], net->rates, net->rates_len);
memcpy(&softnet->supported_rates.rates[softnet->supported_rates.count], net->rates_ex, net->rates_ex_len);
softnet->supported_rates.count += net->rates_ex_len;
sort(softnet->supported_rates.rates, softnet->supported_rates.count, sizeof(softnet->supported_rates.rates[0]), rate_cmp, NULL);
softnet->capabilities = net->capability;
return softnet;
}
/* Add a network to the list, while locked */
void
ieee80211softmac_add_network_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *add_net)
{
struct list_head *list_ptr;
struct ieee80211softmac_network *softmac_net = NULL;
list_for_each(list_ptr, &mac->network_list) {
softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list);
if(!memcmp(softmac_net->bssid, add_net->bssid, ETH_ALEN))
break;
else
softmac_net = NULL;
}
if(softmac_net == NULL)
list_add(&(add_net->list), &mac->network_list);
}
/* Add a network to the list, with locking */
void
ieee80211softmac_add_network(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *add_net)
{
unsigned long flags;
spin_lock_irqsave(&mac->lock, flags);
ieee80211softmac_add_network_locked(mac, add_net);
spin_unlock_irqrestore(&mac->lock, flags);
}
/* Delete a network from the list, while locked*/
void
ieee80211softmac_del_network_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *del_net)
{
list_del(&(del_net->list));
}
/* Delete a network from the list with locking */
void
ieee80211softmac_del_network(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *del_net)
{
unsigned long flags;
spin_lock_irqsave(&mac->lock, flags);
ieee80211softmac_del_network_locked(mac, del_net);
spin_unlock_irqrestore(&mac->lock, flags);
}
/* Get a network from the list by MAC while locked */
struct ieee80211softmac_network *
ieee80211softmac_get_network_by_bssid_locked(struct ieee80211softmac_device *mac,
u8 *bssid)
{
struct list_head *list_ptr;
struct ieee80211softmac_network *softmac_net = NULL;
list_for_each(list_ptr, &mac->network_list) {
softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list);
if(!memcmp(softmac_net->bssid, bssid, ETH_ALEN))
break;
else
softmac_net = NULL;
}
return softmac_net;
}
/* Get a network from the list by BSSID with locking */
struct ieee80211softmac_network *
ieee80211softmac_get_network_by_bssid(struct ieee80211softmac_device *mac,
u8 *bssid)
{
unsigned long flags;
struct ieee80211softmac_network *softmac_net;
spin_lock_irqsave(&mac->lock, flags);
softmac_net = ieee80211softmac_get_network_by_bssid_locked(mac, bssid);
spin_unlock_irqrestore(&mac->lock, flags);
return softmac_net;
}
/* Get a network from the list by ESSID while locked */
struct ieee80211softmac_network *
ieee80211softmac_get_network_by_essid_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_essid *essid)
{
struct list_head *list_ptr;
struct ieee80211softmac_network *softmac_net = NULL;
list_for_each(list_ptr, &mac->network_list) {
softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list);
if (softmac_net->essid.len == essid->len &&
!memcmp(softmac_net->essid.data, essid->data, essid->len))
return softmac_net;
}
return NULL;
}
/* Get a network from the list by ESSID with locking */
struct ieee80211softmac_network *
ieee80211softmac_get_network_by_essid(struct ieee80211softmac_device *mac,
struct ieee80211softmac_essid *essid)
{
unsigned long flags;
struct ieee80211softmac_network *softmac_net = NULL;
spin_lock_irqsave(&mac->lock, flags);
softmac_net = ieee80211softmac_get_network_by_essid_locked(mac, essid);
spin_unlock_irqrestore(&mac->lock, flags);
return softmac_net;
}
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Johannes Berg");
MODULE_AUTHOR("Joseph Jezak");
MODULE_AUTHOR("Larry Finger");
MODULE_AUTHOR("Danny van Dyk");
MODULE_AUTHOR("Michael Buesch");
MODULE_DESCRIPTION("802.11 software MAC");

239
net/ieee80211/softmac/ieee80211softmac_priv.h Normal file
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/*
* Internal softmac API definitions.
*
* 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.
*/
#ifndef IEEE80211SOFTMAC_PRIV_H_
#define IEEE80211SOFTMAC_PRIV_H_
#include <net/ieee80211softmac.h>
#include <net/ieee80211softmac_wx.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
#define PFX "SoftMAC: "
#ifdef assert
# undef assert
#endif
#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG
#define assert(expr) \
do { \
if (unlikely(!(expr))) { \
printkl(KERN_ERR PFX "ASSERTION FAILED (%s) at: %s:%d:%s()\n", #expr, \
__FILE__, __LINE__, __FUNCTION__); \
} \
} while (0)
#else
#define assert(expr) do {} while (0)
#endif
/* rate limited printk(). */
#ifdef printkl
# undef printkl
#endif
#define printkl(f, x...) do { if (printk_ratelimit()) printk(f ,##x); } while (0)
/* rate limited printk() for debugging */
#ifdef dprintkl
# undef dprintkl
#endif
#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG
# define dprintkl printkl
#else
# define dprintkl(f, x...) do { /* nothing */ } while (0)
#endif
/* debugging printk() */
#ifdef dprintk
# undef dprintk
#endif
#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG
# define dprintk(f, x...) do { printk(f ,##x); } while (0)
#else
# define dprintk(f, x...) do { /* nothing */ } while (0)
#endif
#ifdef function_enter
# undef function_enter
#endif
#ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG
# define function_enter() do { printk(KERN_DEBUG PFX "%s:%d:%s()\n", __FILE__, __LINE__, __FUNCTION__); } while (0)
#else
# define function_enter() do { /* nothing */ } while (0)
#endif
/* private definitions and prototypes */
/*** prototypes from _scan.c */
void ieee80211softmac_scan(void *sm);
/* for internal use if scanning is needed */
int ieee80211softmac_start_scan(struct ieee80211softmac_device *mac);
void ieee80211softmac_stop_scan(struct ieee80211softmac_device *mac);
void ieee80211softmac_wait_for_scan(struct ieee80211softmac_device *mac);
/* for use by _module.c to assign to the callbacks */
int ieee80211softmac_start_scan_implementation(struct net_device *dev);
void ieee80211softmac_stop_scan_implementation(struct net_device *dev);
void ieee80211softmac_wait_for_scan_implementation(struct net_device *dev);
/*** Network prototypes from _module.c */
struct ieee80211softmac_network * ieee80211softmac_create_network(
struct ieee80211softmac_device *mac, struct ieee80211_network *net);
void ieee80211softmac_add_network_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net);
void ieee80211softmac_add_network(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net);
void ieee80211softmac_del_network_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net);
void ieee80211softmac_del_network(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *net);
struct ieee80211softmac_network * ieee80211softmac_get_network_by_bssid_locked(
struct ieee80211softmac_device *mac, u8 *ea);
struct ieee80211softmac_network * ieee80211softmac_get_network_by_bssid(
struct ieee80211softmac_device *mac, u8 *ea);
struct ieee80211softmac_network * ieee80211softmac_get_network_by_ssid_locked(
struct ieee80211softmac_device *mac, u8 *ssid, u8 ssid_len);
struct ieee80211softmac_network * ieee80211softmac_get_network_by_ssid(
struct ieee80211softmac_device *mac, u8 *ssid, u8 ssid_len);
struct ieee80211softmac_network *
ieee80211softmac_get_network_by_essid_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_essid *essid);
struct ieee80211softmac_network *
ieee80211softmac_get_network_by_essid(struct ieee80211softmac_device *mac,
struct ieee80211softmac_essid *essid);
/* Rates related */
u8 ieee80211softmac_lower_rate_delta(struct ieee80211softmac_device *mac, u8 rate, int delta);
static inline u8 lower_rate(struct ieee80211softmac_device *mac, u8 rate) {
return ieee80211softmac_lower_rate_delta(mac, rate, 1);
}
static inline u8 get_fallback_rate(struct ieee80211softmac_device *mac, u8 rate)
{
return ieee80211softmac_lower_rate_delta(mac, rate, 2);
}
/*** prototypes from _io.c */
int ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac,
void* ptrarg, u32 type, u32 arg);
/*** prototypes from _auth.c */
/* do these have to go into the public header? */
int ieee80211softmac_auth_req(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net);
int ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, int reason);
/* for use by _module.c to assign to the callbacks */
int ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth);
int ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_deauth *deauth);
/*** prototypes from _assoc.c */
void ieee80211softmac_assoc_work(void *d);
int ieee80211softmac_handle_assoc_response(struct net_device * dev,
struct ieee80211_assoc_response * resp,
struct ieee80211_network * network);
int ieee80211softmac_handle_disassoc(struct net_device * dev,
struct ieee80211_disassoc * disassoc);
int ieee80211softmac_handle_reassoc_req(struct net_device * dev,
struct ieee80211_reassoc_request * reassoc);
void ieee80211softmac_assoc_timeout(void *d);
/* some helper functions */
static inline int ieee80211softmac_scan_handlers_check_self(struct ieee80211softmac_device *sm)
{
return (sm->start_scan == ieee80211softmac_start_scan_implementation) &&
(sm->stop_scan == ieee80211softmac_stop_scan_implementation) &&
(sm->wait_for_scan == ieee80211softmac_wait_for_scan_implementation);
}
static inline int ieee80211softmac_scan_sanity_check(struct ieee80211softmac_device *sm)
{
return ((sm->start_scan != ieee80211softmac_start_scan_implementation) &&
(sm->stop_scan != ieee80211softmac_stop_scan_implementation) &&
(sm->wait_for_scan != ieee80211softmac_wait_for_scan_implementation)
) || ieee80211softmac_scan_handlers_check_self(sm);
}
#define IEEE80211SOFTMAC_PROBE_DELAY HZ/2
#define IEEE80211SOFTMAC_WORKQUEUE_NAME_LEN (17 + IFNAMSIZ)
struct ieee80211softmac_network {
struct list_head list; /* List */
/* Network information copied from ieee80211_network */
u8 bssid[ETH_ALEN];
u8 channel;
struct ieee80211softmac_essid essid;
struct ieee80211softmac_ratesinfo supported_rates;
/* SoftMAC specific */
u16 authenticating:1, /* Status Flags */
authenticated:1,
auth_desynced_once:1;
u16 capabilities; /* Capabilities bitfield */
u8 challenge_len; /* Auth Challenge length */
char *challenge; /* Challenge Text */
};
/* structure used to keep track of networks we're auth'ing to */
struct ieee80211softmac_auth_queue_item {
struct list_head list; /* List head */
struct ieee80211softmac_network *net; /* Network to auth */
struct ieee80211softmac_device *mac; /* SoftMAC device */
u8 retry; /* Retry limit */
u8 state; /* Auth State */
struct work_struct work; /* Work queue */
};
/* scanning information */
struct ieee80211softmac_scaninfo {
u8 current_channel_idx,
number_channels;
struct ieee80211_channel *channels;
u8 started:1,
stop:1;
u8 skip_flags;
struct completion finished;
struct work_struct softmac_scan;
};
/* private event struct */
struct ieee80211softmac_event {
struct list_head list;
int event_type;
void *event_context;
struct work_struct work;
notify_function_ptr fun;
void *context;
struct ieee80211softmac_device *mac;
};
void ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_context);
void ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_context);
int ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac,
int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask);
#endif /* IEEE80211SOFTMAC_PRIV_H_ */

237
net/ieee80211/softmac/ieee80211softmac_scan.c Normal file
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/*
* 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(void *d)
{
int invalid_channel;
u8 current_channel_idx;
struct ieee80211softmac_device *sm = (struct ieee80211softmac_device *)d;
struct ieee80211softmac_scaninfo *si = sm->scaninfo;
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);
schedule_delayed_work(&si->softmac_scan, IEEE80211SOFTMAC_PROBE_DELAY);
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\n");
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_WORK(&info->softmac_scan, ieee80211softmac_scan, 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;
}
dprintk(PFX "Start scanning with channel: %d\n", sm->scaninfo->channels[0].channel);
dprintk(PFX "Scanning %d channels\n", sm->scaninfo->number_channels);
sm->scaninfo->current_channel_idx = 0;
sm->scaninfo->started = 1;
sm->scaninfo->stop = 0;
INIT_COMPLETION(sm->scaninfo->finished);
schedule_work(&sm->scaninfo->softmac_scan);
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);
ieee80211softmac_call_events(sm, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, NULL);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_scan_finished);

412
net/ieee80211/softmac/ieee80211softmac_wx.c Normal file
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@ -0,0 +1,412 @@
/*
* This file contains our _wx handlers. Make sure you EXPORT_SYMBOL_GPL them
*
* 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"
#include <net/iw_handler.h>
int
ieee80211softmac_wx_trigger_scan(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
return ieee80211softmac_start_scan(sm);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_trigger_scan);
int
ieee80211softmac_wx_get_scan_results(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
return ieee80211_wx_get_scan(sm->ieee, info, data, extra);
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_scan_results);
int
ieee80211softmac_wx_set_essid(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
int length = 0;
unsigned long flags;
spin_lock_irqsave(&sm->lock, flags);
sm->associnfo.static_essid = 0;
if (data->essid.flags && data->essid.length && extra /*required?*/) {
length = min(data->essid.length - 1, IW_ESSID_MAX_SIZE);
if (length) {
memcpy(sm->associnfo.req_essid.data, extra, length);
sm->associnfo.static_essid = 1;
}
}
sm->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
/* set our requested ESSID length.
* If applicable, we have already copied the data in */
sm->associnfo.req_essid.len = length;
/* queue lower level code to do work (if necessary) */
schedule_work(&sm->associnfo.work);
spin_unlock_irqrestore(&sm->lock, flags);
return 0;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_essid);
int
ieee80211softmac_wx_get_essid(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *sm = ieee80211_priv(net_dev);
unsigned long flags;
/* avoid getting inconsistent information */
spin_lock_irqsave(&sm->lock, flags);
/* If all fails, return ANY (empty) */
data->essid.length = 0;
data->essid.flags = 0; /* active */
/* If we have a statically configured ESSID then return it */
if (sm->associnfo.static_essid) {
data->essid.length = sm->associnfo.req_essid.len;
data->essid.flags = 1; /* active */
memcpy(extra, sm->associnfo.req_essid.data, sm->associnfo.req_essid.len);
}
/* If we're associating/associated, return that */
if (sm->associated || sm->associnfo.associating) {
data->essid.length = sm->associnfo.associate_essid.len;
data->essid.flags = 1; /* active */
memcpy(extra, sm->associnfo.associate_essid.data, sm->associnfo.associate_essid.len);
}
spin_unlock_irqrestore(&sm->lock, flags);
return 0;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_essid);
int
ieee80211softmac_wx_set_rate(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
struct ieee80211_device *ieee = mac->ieee;
unsigned long flags;
s32 in_rate = data->bitrate.value;
u8 rate;
int is_ofdm = 0;
int err = -EINVAL;
if (in_rate == -1) {
/* automatic detect */
if (ieee->modulation & IEEE80211_OFDM_MODULATION)
in_rate = 54000000;
else
in_rate = 11000000;
}
switch (in_rate) {
case 1000000:
rate = IEEE80211_CCK_RATE_1MB;
break;
case 2000000:
rate = IEEE80211_CCK_RATE_2MB;
break;
case 5500000:
rate = IEEE80211_CCK_RATE_5MB;
break;
case 11000000:
rate = IEEE80211_CCK_RATE_11MB;
break;
case 6000000:
rate = IEEE80211_OFDM_RATE_6MB;
is_ofdm = 1;
break;
case 9000000:
rate = IEEE80211_OFDM_RATE_9MB;
is_ofdm = 1;
break;
case 12000000:
rate = IEEE80211_OFDM_RATE_12MB;
is_ofdm = 1;
break;
case 18000000:
rate = IEEE80211_OFDM_RATE_18MB;
is_ofdm = 1;
break;
case 24000000:
rate = IEEE80211_OFDM_RATE_24MB;
is_ofdm = 1;
break;
case 36000000:
rate = IEEE80211_OFDM_RATE_36MB;
is_ofdm = 1;
break;
case 48000000:
rate = IEEE80211_OFDM_RATE_48MB;
is_ofdm = 1;
break;
case 54000000:
rate = IEEE80211_OFDM_RATE_54MB;
is_ofdm = 1;
break;
default:
goto out;
}
spin_lock_irqsave(&mac->lock, flags);
/* Check if correct modulation for this PHY. */
if (is_ofdm && !(ieee->modulation & IEEE80211_OFDM_MODULATION))
goto out_unlock;
mac->txrates.default_rate = rate;
mac->txrates.default_fallback = lower_rate(mac, rate);
err = 0;
out_unlock:
spin_unlock_irqrestore(&mac->lock, flags);
out:
return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_rate);
int
ieee80211softmac_wx_get_rate(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
unsigned long flags;
int err = -EINVAL;
spin_lock_irqsave(&mac->lock, flags);
switch (mac->txrates.default_rate) {
case IEEE80211_CCK_RATE_1MB:
data->bitrate.value = 1000000;
break;
case IEEE80211_CCK_RATE_2MB:
data->bitrate.value = 2000000;
break;
case IEEE80211_CCK_RATE_5MB:
data->bitrate.value = 5500000;
break;
case IEEE80211_CCK_RATE_11MB:
data->bitrate.value = 11000000;
break;
case IEEE80211_OFDM_RATE_6MB:
data->bitrate.value = 6000000;
break;
case IEEE80211_OFDM_RATE_9MB:
data->bitrate.value = 9000000;
break;
case IEEE80211_OFDM_RATE_12MB:
data->bitrate.value = 12000000;
break;
case IEEE80211_OFDM_RATE_18MB:
data->bitrate.value = 18000000;
break;
case IEEE80211_OFDM_RATE_24MB:
data->bitrate.value = 24000000;
break;
case IEEE80211_OFDM_RATE_36MB:
data->bitrate.value = 36000000;
break;
case IEEE80211_OFDM_RATE_48MB:
data->bitrate.value = 48000000;
break;
case IEEE80211_OFDM_RATE_54MB:
data->bitrate.value = 54000000;
break;
default:
assert(0);
goto out_unlock;
}
err = 0;
out_unlock:
spin_unlock_irqrestore(&mac->lock, flags);
return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_rate);
int
ieee80211softmac_wx_get_wap(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
int err = 0;
unsigned long flags;
spin_lock_irqsave(&mac->lock, flags);
if (mac->associnfo.bssvalid)
memcpy(data->ap_addr.sa_data, mac->associnfo.bssid, ETH_ALEN);
else
memset(data->ap_addr.sa_data, 0xff, ETH_ALEN);
data->ap_addr.sa_family = ARPHRD_ETHER;
spin_unlock_irqrestore(&mac->lock, flags);
return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_wap);
int
ieee80211softmac_wx_set_wap(struct net_device *net_dev,
struct iw_request_info *info,
union iwreq_data *data,
char *extra)
{
struct ieee80211softmac_device *mac = ieee80211_priv(net_dev);
static const unsigned char any[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
static const unsigned char off[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
unsigned long flags;
/* sanity check */
if (data->ap_addr.sa_family != ARPHRD_ETHER) {
return -EINVAL;
}
spin_lock_irqsave(&mac->lock, flags);
if (!memcmp(any, data->ap_addr.sa_data, ETH_ALEN) ||
!memcmp(off, data->ap_addr.sa_data, ETH_ALEN)) {
schedule_work(&mac->associnfo.work);
goto out;
} else {
if (!memcmp(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN)) {
if (mac->associnfo.associating || mac->associated) {
/* bssid unchanged and associated or associating - just return */
goto out;
}
} else {
/* copy new value in data->ap_addr.sa_data to bssid */
memcpy(mac->associnfo.bssid, data->ap_addr.sa_data, ETH_ALEN);
}
/* queue associate if new bssid or (old one again and not associated) */
schedule_work(&mac->associnfo.work);
}
out:
spin_unlock_irqrestore(&mac->lock, flags);
return 0;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_wap);
int
ieee80211softmac_wx_set_genie(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu,
char *extra)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
unsigned long flags;
int err = 0;
char *buf;
int i;
spin_lock_irqsave(&mac->lock, flags);
/* bleh. shouldn't be locked for that kmalloc... */
if (wrqu->data.length) {
if ((wrqu->data.length < 2) || (extra[1]+2 != wrqu->data.length)) {
/* this is an IE, so the length must be
* correct. Is it possible though that
* more than one IE is passed in?
*/
err = -EINVAL;
goto out;
}
if (mac->wpa.IEbuflen <= wrqu->data.length) {
buf = kmalloc(wrqu->data.length, GFP_ATOMIC);
if (!buf) {
err = -ENOMEM;
goto out;
}
kfree(mac->wpa.IE);
mac->wpa.IE = buf;
mac->wpa.IEbuflen = wrqu->data.length;
}
memcpy(mac->wpa.IE, extra, wrqu->data.length);
dprintk(KERN_INFO PFX "generic IE set to ");
for (i=0;i<wrqu->data.length;i++)
dprintk("%.2x", mac->wpa.IE[i]);
dprintk("\n");
mac->wpa.IElen = wrqu->data.length;
} else {
kfree(mac->wpa.IE);
mac->wpa.IE = NULL;
mac->wpa.IElen = 0;
mac->wpa.IEbuflen = 0;
}
out:
spin_unlock_irqrestore(&mac->lock, flags);
return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_set_genie);
int
ieee80211softmac_wx_get_genie(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu,
char *extra)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
unsigned long flags;
int err = 0;
int space = wrqu->data.length;
spin_lock_irqsave(&mac->lock, flags);
wrqu->data.length = 0;
if (mac->wpa.IE && mac->wpa.IElen) {
wrqu->data.length = mac->wpa.IElen;
if (mac->wpa.IElen <= space)
memcpy(extra, mac->wpa.IE, mac->wpa.IElen);
else
err = -E2BIG;
}
spin_unlock_irqrestore(&mac->lock, flags);
return err;
}
EXPORT_SYMBOL_GPL(ieee80211softmac_wx_get_genie);