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linux-wlan-ng/src/p80211/p80211req.c

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/* src/p80211/p80211req.c
*
* Request/Indication/MacMgmt interface handling functions
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License version 2 (the "GPL"), in which
* case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use
* your version of this file under the MPL, indicate your decision
* by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the linux-wlan Open Source project can be
* made directly to:
*
* AbsoluteValue Systems Inc.
* info@linux-wlan.com
* http://www.linux-wlan.com
*
* --------------------------------------------------------------------
*
* Portions of the development of this software were funded by
* Intersil Corporation as part of PRISM(R) chipset product development.
*
* --------------------------------------------------------------------
*
* This file contains the functions, types, and macros to support the
* MLME request interface that's implemented via the device ioctls.
*
* --------------------------------------------------------------------
*/
/*================================================================*/
/* System Includes */
#define __NO_VERSION__ /* prevent the static definition */
#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <net/sock.h>
#include <linux/netlink.h>
#include <wlan/wlan_compat.h>
/*================================================================*/
/* Project Includes */
#include <wlan/version.h>
#include <wlan/p80211types.h>
#include <wlan/p80211hdr.h>
#include <wlan/p80211mgmt.h>
#include <wlan/p80211conv.h>
#include <wlan/p80211msg.h>
#include <wlan/p80211netdev.h>
#include <wlan/p80211ioctl.h>
#include <wlan/p80211metadef.h>
#include <wlan/p80211metastruct.h>
/*================================================================*/
/* Local Constants */
/* Maximum amount of time we'll wait for a request to complete */
#define P80211REQ_MAXTIME 3*HZ /* 3 seconds */
/*================================================================*/
/* Local Macros */
/*================================================================*/
/* Local Types */
typedef void (*timerfunc_t)(unsigned long);
/*================================================================*/
/* Local Static Definitions */
/* Netlink interface(s) */
static struct sock *nl_indicate = NULL;
/*================================================================*/
/* Local Function Declarations */
static void p80211req_timerfunc(wlandevice_t *wlandev);
static void p80211req_handlemsg( wlandevice_t *wlandev, p80211msg_t *msg);
static int p80211req_mibset_mibget(wlandevice_t *wlandev, p80211msg_dot11req_mibget_t *mib_msg, int isget);
#ifdef CONFIG_NETLINK
static void p80211ind_rx(struct sock *sk, int len);
#endif
/*================================================================*/
/* Function Definitions */
/*----------------------------------------------------------------
* p80211req_dorequest
*
* Handles an MLME reqest/confirm message.
*
* Arguments:
* wlandev WLAN device struct
* msgbuf Buffer containing a request message
*
* Returns:
* 0 on success, an errno otherwise
*
* Call context:
* Potentially blocks the caller, so it's a good idea to
* not call this function from an interrupt context.
----------------------------------------------------------------*/
int p80211req_dorequest( wlandevice_t *wlandev, UINT8 *msgbuf)
{
int result = 0;
int retval;
p80211msg_t *msg = (p80211msg_t*)msgbuf;
DBFENTER;
/* Check to make sure the MSD is running */
if (
!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
msg->msgcode == DIDmsg_lnxreq_ifstate) ||
wlandev->msdstate == WLAN_MSD_RUNNING ||
wlandev->msdstate == WLAN_MSD_FWLOAD) ) {
return -ENODEV;
}
/* Check for busy status */
if ( test_and_set_bit(1, &(wlandev->request_pending))) {
return -EBUSY;
}
wlandev->curr_msg = msg;
/* Allow p80211 to look at msg and handle if desired. */
/* So far, all p80211 msgs are immediate, no waitq/timer necessary */
/* This may change. */
p80211req_handlemsg(wlandev, msg);
/* Pass it down to wlandev via wlandev->mlmerequest */
if ( wlandev->mlmerequest != NULL ) {
retval = (*(wlandev->mlmerequest))(wlandev, msg);
if (retval < 0) {
/* wlandev is still chewing on it, time to block */
/* set up wait_q and timeout */
init_timer(&wlandev->reqtimer);
wlandev->reqtimer.data = (unsigned long)wlandev;
wlandev->reqtimer.function =
(timerfunc_t)p80211req_timerfunc;
wlandev->reqtimer.expires = jiffies + P80211REQ_MAXTIME;
add_timer(&wlandev->reqtimer);
/* Now, do an interruptible_sleep, */
/* we'll be awakened by: a signal to the process, */
/* cmdtimerfunc (timeout), or p80211req_confirm */
interruptible_sleep_on(&(wlandev->reqwq));
/* If sleep return is via signal */
if ( signal_pending(current) ) {
WLAN_LOG_DEBUG0(2,"req unblocked via signal\n");
/* stop request, clean up */
del_timer(&wlandev->reqtimer);
result = -EINTR;
} else {
/* If timeout */
if ( wlandev->reqtimer.expires == 0 )
{
WLAN_LOG_DEBUG0(2,
"req unblocked via timeout\n");
/* stop request, clean up request */
result = -ETIME;
} else {
/* Success, clean up timer */
del_timer(&wlandev->reqtimer);
wlandev->reqtimer.expires=0;
result = 0;
}
}
} else {
result = -retval; /* retval shld be a positive errno */
}
}
wlandev->curr_msg = NULL;
clear_bit( 1, &(wlandev->request_pending));
DBFEXIT;
return result; /* if result==0, msg->status still may contain an err */
}
/*----------------------------------------------------------------
* p80211req_timerfunc
*
* Timer function for request timeouts.
*
* Arguments:
* wlandev WLAN device struct
*
* Returns:
* nothing
*
* Call context:
* Timer interrupt
----------------------------------------------------------------*/
void p80211req_timerfunc(wlandevice_t *wlandev)
{
wlandev->reqtimer.expires = 0;
if (wlandev->request_pending != 0) {
wake_up_interruptible(&(wlandev->reqwq));
}
}
/*----------------------------------------------------------------
* p80211req_handlemsg
*
* p80211 message handler. Primarily looks for messages that
* belong to p80211 and then dispatches the appropriate response.
* TODO: we don't do anything yet. Once the linuxMIB is better
* defined we'll need a get/set handler.
*
* Arguments:
* wlandev WLAN device struct
* msg message structure
*
* Returns:
* nothing (any results are set in the status field of the msg)
*
* Call context:
* Process thread
----------------------------------------------------------------*/
void p80211req_handlemsg( wlandevice_t *wlandev, p80211msg_t *msg)
{
DBFENTER;
switch (msg->msgcode) {
case DIDmsg_lnxreq_hostwep: {
p80211msg_lnxreq_hostwep_t *req = (p80211msg_lnxreq_hostwep_t*) msg;
wlandev->hostwep &= ~(HOSTWEP_DECRYPT|HOSTWEP_ENCRYPT);
if (req->decrypt.data == P80211ENUM_truth_true)
wlandev->hostwep |= HOSTWEP_DECRYPT;
if (req->encrypt.data == P80211ENUM_truth_true)
wlandev->hostwep |= HOSTWEP_ENCRYPT;
break;
}
case DIDmsg_dot11req_mibget:
case DIDmsg_dot11req_mibset: {
int isget = (msg->msgcode == DIDmsg_dot11req_mibget);
p80211msg_dot11req_mibget_t *mib_msg = (p80211msg_dot11req_mibget_t *) msg;
p80211req_mibset_mibget (wlandev, mib_msg, isget);
}
default:
// XXX do nothing!
;
} /* switch msg->msgcode */
DBFEXIT;
return;
}
int p80211req_mibset_mibget(wlandevice_t *wlandev, p80211msg_dot11req_mibget_t *mib_msg, int isget)
{
p80211itemd_t *mibitem = (p80211itemd_t *) mib_msg->mibattribute.data;
p80211pstrd_t *pstr = (p80211pstrd_t*) mibitem->data;
UINT8 *key = mibitem->data + sizeof(p80211pstrd_t);
DBFENTER;
switch (mibitem->did) {
case DIDmib_dot11smt_p80211Table_p80211_ifstate: {
UINT32 *data = (UINT32 *) mibitem->data;
if (isget)
switch (wlandev->msdstate) {
case WLAN_MSD_HWPRESENT:
*data = P80211ENUM_ifstate_disable;
break;
case WLAN_MSD_FWLOAD:
*data = P80211ENUM_ifstate_fwload;
break;
case WLAN_MSD_RUNNING:
*data = P80211ENUM_ifstate_enable;
break;
default:
*data = P80211ENUM_ifstate_enable;
}
break;
}
case DIDmib_dot11phy_dot11PhyOperationTable_dot11ShortPreambleEnabled: {
UINT32 *data = (UINT32 *) mibitem->data;
if (isget)
*data = wlandev->shortpreamble;
else
wlandev->shortpreamble = *data;
break;
}
case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey0: {
if (!isget)
wep_change_key(wlandev, 0, key, pstr->len);
break;
}
case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey1: {
if (!isget)
wep_change_key(wlandev, 1, key, pstr->len);
break;
}
case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey2: {
if (!isget)
wep_change_key(wlandev, 2, key, pstr->len);
break;
}
case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey3: {
if (!isget)
wep_change_key(wlandev, 3, key, pstr->len);
break;
}
case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID: {
UINT32 *data = (UINT32 *) mibitem->data;
if (isget) {
*data = wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
} else {
wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
wlandev->hostwep |= (*data & HOSTWEP_DEFAULTKEY_MASK);
}
break;
}
case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked: {
UINT32 *data = (UINT32 *) mibitem->data;
if (isget) {
if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
*data = P80211ENUM_truth_true;
else
*data = P80211ENUM_truth_false;
} else {
wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
if (*data == P80211ENUM_truth_true)
wlandev->hostwep |= HOSTWEP_PRIVACYINVOKED;
}
break;
}
case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted: {
UINT32 *data = (UINT32 *) mibitem->data;
if (isget) {
if (wlandev->hostwep & HOSTWEP_EXCLUDEUNENCRYPTED)
*data = P80211ENUM_truth_true;
else
*data = P80211ENUM_truth_false;
} else {
wlandev->hostwep &= ~(HOSTWEP_EXCLUDEUNENCRYPTED);
if (*data == P80211ENUM_truth_true)
wlandev->hostwep |= HOSTWEP_EXCLUDEUNENCRYPTED;
}
break;
}
default:
// XXXX do nothing!
;
}
DBFEXIT;
return 0;
}
/*----------------------------------------------------------------
* p80211req_confirm
*
* Called by the MSD when an asynch request is finished. Our
* primary job here is to unblock the _dorequest function above.
*
* Arguments:
* wlandev WLAN device struct
*
* Returns:
* nothing
*
* Call context:
* Any
----------------------------------------------------------------*/
void p80211req_confirm(wlandevice_t *wlandev)
{
DBFENTER;
if ( wlandev->request_pending != 0 ){
wake_up_interruptible(&(wlandev->reqwq));
}
DBFEXIT;
return;
}
#ifdef CONFIG_NETLINK
/*----------------------------------------------------------------
* p80211indicate_init
*
* Called during the p80211 startup to set up the netlink interfaces
* for sniffing and indication messages.
*
* Arguments:
* none
*
* Returns:
* nothing
*
* Call context:
* Any
----------------------------------------------------------------*/
void p80211indicate_init(void)
{
DBFENTER;
nl_indicate =
netlink_kernel_create( P80211_NL_SOCK_IND, &p80211ind_rx);
if ( nl_indicate == NULL ) {
WLAN_LOG_DEBUG0(2,"Failed to create indicate netlink i/f.\n");
}
DBFEXIT;
return;
}
/*----------------------------------------------------------------
* p80211indicate_shutdown
*
* Called during the p80211 unload to get rid of our netlink
* interface.
*
* Arguments:
* none
*
* Returns:
* nothing
*
* Call context:
* Any
----------------------------------------------------------------*/
void p80211indicate_shutdown(void)
{
struct sock *nl;
DBFENTER;
nl = nl_indicate;
nl_indicate = NULL;
if ( nl != NULL && nl->socket != NULL) {
sock_release(nl->socket);
}
DBFEXIT;
return;
}
/*----------------------------------------------------------------
* p80211ind_rx
*
* Called by netlink when a message comes down. We currently don't
* support message from userland via netlink, so this is a empty
* function.
*
* Arguments:
* sk netlink sock
* len msg len
*
* Returns:
* nothing
*
* Call context:
* Any
----------------------------------------------------------------*/
void p80211ind_rx(struct sock *sk, int len)
{
return;
}
/*----------------------------------------------------------------
* p80211ind_mlme
*
* Called by the MSD to deliver an mlme type indication message.
*
* Arguments:
* wlandev WLAN device struct
* skb skb containing message to deliver
*
* Returns:
* nothing
*
* Call context:
* Any
----------------------------------------------------------------*/
void p80211ind_mlme( wlandevice_t *wlandev, struct sk_buff *skb)
{
DBFENTER;
if ( nl_indicate != NULL ) {
/* TODO: Look at queuing mlme indications when requests are pending. */
netlink_broadcast(nl_indicate,
skb, 0, P80211_NL_MCAST_GRP_MLME, GFP_ATOMIC);
} else {
WLAN_LOG_DEBUG0(2,"Can't send indicate msg, no netlink i/f\n");
}
DBFEXIT;
return;
}
/*----------------------------------------------------------------
* p80211ind_distribution
*
* Called by the MSD to deliver a distribution system type
* indication message.
*
* Arguments:
* wlandev WLAN device struct
* skb skb containing message to deliver
*
* Returns:
* nothing
*
* Call context:
* Any
----------------------------------------------------------------*/
void p80211ind_distribution( wlandevice_t *wlandev, struct sk_buff *skb)
{
DBFENTER;
if ( nl_indicate != NULL ) {
/*
skb = alloc_skb(len, GFP_ATOMIC);
skb_put(skb, len);
memcpy(skb->data, msg, len);
*/
netlink_broadcast(nl_indicate,
skb, 0, P80211_NL_MCAST_GRP_DIST, GFP_ATOMIC);
} else {
WLAN_LOG_DEBUG0(2,"Can't send indicate msg, no netlink i/f\n");
}
DBFEXIT;
return;
}
#endif /* CONFIG_NETLINK */
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