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kernel-ark/drivers/staging/rt2860/sta/auth.c
Greg Kroah-Hartman 9198099052 Staging: add rt2860 wireless driver 
This is the Ralink RT2860 driver from the company that does horrible
things like reading a config file from /etc.  However, the driver that
is currently under development from the wireless development community
is not working at all yet, so distros and users are using this version
instead (quite common hardware on a lot of netbook machines).

So here is this driver, for now, until the wireless developers get a
"clean" version into the main tree, or until this version is cleaned up
sufficiently to move out of the staging tree.

Ported to the Linux build system and cleaned up a bit already by me.

Cc: Linux wireless <linux-wireless@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-06 13:52:11 -08:00

475 lines
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/*
*************************************************************************
* Ralink Tech Inc.
* 5F., No.36, Taiyuan St., Jhubei City,
* Hsinchu County 302,
* Taiwan, R.O.C.
*
* (c) Copyright 2002-2007, Ralink Technology, Inc.
*
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
*************************************************************************
Module Name:
auth.c
Abstract:
Revision History:
Who When What
-------- ---------- ----------------------------------------------
John 2004-9-3 porting from RT2500
*/
#include "../rt_config.h"
/*
==========================================================================
Description:
authenticate state machine init, including state transition and timer init
Parameters:
Sm - pointer to the auth state machine
Note:
The state machine looks like this
AUTH_REQ_IDLE AUTH_WAIT_SEQ2 AUTH_WAIT_SEQ4
MT2_MLME_AUTH_REQ mlme_auth_req_action invalid_state_when_auth invalid_state_when_auth
MT2_PEER_AUTH_EVEN drop peer_auth_even_at_seq2_action peer_auth_even_at_seq4_action
MT2_AUTH_TIMEOUT Drop auth_timeout_action auth_timeout_action
IRQL = PASSIVE_LEVEL
==========================================================================
*/
void AuthStateMachineInit(
IN PRTMP_ADAPTER pAd,
IN STATE_MACHINE *Sm,
OUT STATE_MACHINE_FUNC Trans[])
{
StateMachineInit(Sm, Trans, MAX_AUTH_STATE, MAX_AUTH_MSG, (STATE_MACHINE_FUNC)Drop, AUTH_REQ_IDLE, AUTH_MACHINE_BASE);
// the first column
StateMachineSetAction(Sm, AUTH_REQ_IDLE, MT2_MLME_AUTH_REQ, (STATE_MACHINE_FUNC)MlmeAuthReqAction);
// the second column
StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_MLME_AUTH_REQ, (STATE_MACHINE_FUNC)InvalidStateWhenAuth);
StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_PEER_AUTH_EVEN, (STATE_MACHINE_FUNC)PeerAuthRspAtSeq2Action);
StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_AUTH_TIMEOUT, (STATE_MACHINE_FUNC)AuthTimeoutAction);
// the third column
StateMachineSetAction(Sm, AUTH_WAIT_SEQ4, MT2_MLME_AUTH_REQ, (STATE_MACHINE_FUNC)InvalidStateWhenAuth);
StateMachineSetAction(Sm, AUTH_WAIT_SEQ4, MT2_PEER_AUTH_EVEN, (STATE_MACHINE_FUNC)PeerAuthRspAtSeq4Action);
StateMachineSetAction(Sm, AUTH_WAIT_SEQ4, MT2_AUTH_TIMEOUT, (STATE_MACHINE_FUNC)AuthTimeoutAction);
RTMPInitTimer(pAd, &pAd->MlmeAux.AuthTimer, GET_TIMER_FUNCTION(AuthTimeout), pAd, FALSE);
}
/*
==========================================================================
Description:
function to be executed at timer thread when auth timer expires
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID AuthTimeout(
IN PVOID SystemSpecific1,
IN PVOID FunctionContext,
IN PVOID SystemSpecific2,
IN PVOID SystemSpecific3)
{
RTMP_ADAPTER *pAd = (RTMP_ADAPTER *)FunctionContext;
DBGPRINT(RT_DEBUG_TRACE,("AUTH - AuthTimeout\n"));
// Do nothing if the driver is starting halt state.
// This might happen when timer already been fired before cancel timer with mlmehalt
if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
return;
// send a de-auth to reset AP's state machine (Patch AP-Dir635)
if (pAd->Mlme.AuthMachine.CurrState == AUTH_WAIT_SEQ2)
Cls2errAction(pAd, pAd->MlmeAux.Bssid);
MlmeEnqueue(pAd, AUTH_STATE_MACHINE, MT2_AUTH_TIMEOUT, 0, NULL);
RT28XX_MLME_HANDLER(pAd);
}
/*
==========================================================================
Description:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID MlmeAuthReqAction(
IN PRTMP_ADAPTER pAd,
IN MLME_QUEUE_ELEM *Elem)
{
UCHAR Addr[6];
USHORT Alg, Seq, Status;
ULONG Timeout;
HEADER_802_11 AuthHdr;
BOOLEAN TimerCancelled;
NDIS_STATUS NStatus;
PUCHAR pOutBuffer = NULL;
ULONG FrameLen = 0;
// Block all authentication request durning WPA block period
if (pAd->StaCfg.bBlockAssoc == TRUE)
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - Block Auth request durning WPA block period!\n"));
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status = MLME_STATE_MACHINE_REJECT;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
}
else if(MlmeAuthReqSanity(pAd, Elem->Msg, Elem->MsgLen, Addr, &Timeout, &Alg))
{
// reset timer
RTMPCancelTimer(&pAd->MlmeAux.AuthTimer, &TimerCancelled);
COPY_MAC_ADDR(pAd->MlmeAux.Bssid, Addr);
pAd->MlmeAux.Alg = Alg;
Seq = 1;
Status = MLME_SUCCESS;
NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); //Get an unused nonpaged memory
if(NStatus != NDIS_STATUS_SUCCESS)
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - MlmeAuthReqAction(Alg:%d) allocate memory failed\n", Alg));
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status = MLME_FAIL_NO_RESOURCE;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
return;
}
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - Send AUTH request seq#1 (Alg=%d)...\n", Alg));
MgtMacHeaderInit(pAd, &AuthHdr, SUBTYPE_AUTH, 0, Addr, pAd->MlmeAux.Bssid);
MakeOutgoingFrame(pOutBuffer, &FrameLen,
sizeof(HEADER_802_11),&AuthHdr,
2, &Alg,
2, &Seq,
2, &Status,
END_OF_ARGS);
MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
MlmeFreeMemory(pAd, pOutBuffer);
RTMPSetTimer(&pAd->MlmeAux.AuthTimer, Timeout);
pAd->Mlme.AuthMachine.CurrState = AUTH_WAIT_SEQ2;
}
else
{
DBGPRINT_ERR(("AUTH - MlmeAuthReqAction() sanity check failed\n"));
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status = MLME_INVALID_FORMAT;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
}
}
/*
==========================================================================
Description:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID PeerAuthRspAtSeq2Action(
IN PRTMP_ADAPTER pAd,
IN MLME_QUEUE_ELEM *Elem)
{
UCHAR Addr2[MAC_ADDR_LEN];
USHORT Seq, Status, RemoteStatus, Alg;
UCHAR ChlgText[CIPHER_TEXT_LEN];
UCHAR CyperChlgText[CIPHER_TEXT_LEN + 8 + 8];
UCHAR Element[2];
HEADER_802_11 AuthHdr;
BOOLEAN TimerCancelled;
PUCHAR pOutBuffer = NULL;
NDIS_STATUS NStatus;
ULONG FrameLen = 0;
USHORT Status2;
if (PeerAuthSanity(pAd, Elem->Msg, Elem->MsgLen, Addr2, &Alg, &Seq, &Status, ChlgText))
{
if (MAC_ADDR_EQUAL(pAd->MlmeAux.Bssid, Addr2) && Seq == 2)
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - Receive AUTH_RSP seq#2 to me (Alg=%d, Status=%d)\n", Alg, Status));
RTMPCancelTimer(&pAd->MlmeAux.AuthTimer, &TimerCancelled);
if (Status == MLME_SUCCESS)
{
// Authentication Mode "LEAP" has allow for CCX 1.X
if ((pAd->MlmeAux.Alg == Ndis802_11AuthModeOpen)
#ifdef LEAP_SUPPORT
|| (pAd->StaCfg.LeapAuthMode == CISCO_AuthModeLEAP)
#endif // LEAP_SUPPORT //
)
{
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
#ifdef LEAP_SUPPORT
pAd->Mlme.LeapMachine.CurrState = LEAP_IDLE;
#endif // LEAP_SUPPORT //
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
}
else
{
// 2. shared key, need to be challenged
Seq++;
RemoteStatus = MLME_SUCCESS;
// Get an unused nonpaged memory
NStatus = MlmeAllocateMemory(pAd, &pOutBuffer);
if(NStatus != NDIS_STATUS_SUCCESS)
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - PeerAuthRspAtSeq2Action() allocate memory fail\n"));
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status2 = MLME_FAIL_NO_RESOURCE;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status2);
return;
}
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - Send AUTH request seq#3...\n"));
MgtMacHeaderInit(pAd, &AuthHdr, SUBTYPE_AUTH, 0, Addr2, pAd->MlmeAux.Bssid);
AuthHdr.FC.Wep = 1;
// Encrypt challenge text & auth information
RTMPInitWepEngine(
pAd,
pAd->SharedKey[BSS0][pAd->StaCfg.DefaultKeyId].Key,
pAd->StaCfg.DefaultKeyId,
pAd->SharedKey[BSS0][pAd->StaCfg.DefaultKeyId].KeyLen,
CyperChlgText);
Alg = cpu2le16(*(USHORT *)&Alg);
Seq = cpu2le16(*(USHORT *)&Seq);
RemoteStatus= cpu2le16(*(USHORT *)&RemoteStatus);
RTMPEncryptData(pAd, (PUCHAR) &Alg, CyperChlgText + 4, 2);
RTMPEncryptData(pAd, (PUCHAR) &Seq, CyperChlgText + 6, 2);
RTMPEncryptData(pAd, (PUCHAR) &RemoteStatus, CyperChlgText + 8, 2);
Element[0] = 16;
Element[1] = 128;
RTMPEncryptData(pAd, Element, CyperChlgText + 10, 2);
RTMPEncryptData(pAd, ChlgText, CyperChlgText + 12, 128);
RTMPSetICV(pAd, CyperChlgText + 140);
MakeOutgoingFrame(pOutBuffer, &FrameLen,
sizeof(HEADER_802_11), &AuthHdr,
CIPHER_TEXT_LEN + 16, CyperChlgText,
END_OF_ARGS);
MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
MlmeFreeMemory(pAd, pOutBuffer);
RTMPSetTimer(&pAd->MlmeAux.AuthTimer, AUTH_TIMEOUT);
pAd->Mlme.AuthMachine.CurrState = AUTH_WAIT_SEQ4;
}
}
else
{
#ifdef LEAP_SUPPORT
if (pAd->StaCfg.LeapAuthMode == CISCO_AuthModeLEAP)
{
//Invalid Authentication possible rogue AP
//Add this Ap to Rogue AP.
RogueApTableSetEntry(pAd, &pAd->StaCfg.RogueApTab, Addr2, LEAP_REASON_INVALID_AUTH);
}
#endif // LEAP_SUPPORT //
pAd->StaCfg.AuthFailReason = Status;
COPY_MAC_ADDR(pAd->StaCfg.AuthFailSta, Addr2);
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
}
}
}
else
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - PeerAuthSanity() sanity check fail\n"));
}
}
/*
==========================================================================
Description:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID PeerAuthRspAtSeq4Action(
IN PRTMP_ADAPTER pAd,
IN MLME_QUEUE_ELEM *Elem)
{
UCHAR Addr2[MAC_ADDR_LEN];
USHORT Alg, Seq, Status;
CHAR ChlgText[CIPHER_TEXT_LEN];
BOOLEAN TimerCancelled;
if(PeerAuthSanity(pAd, Elem->Msg, Elem->MsgLen, Addr2, &Alg, &Seq, &Status, ChlgText))
{
if(MAC_ADDR_EQUAL(pAd->MlmeAux.Bssid, Addr2) && Seq == 4)
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - Receive AUTH_RSP seq#4 to me\n"));
RTMPCancelTimer(&pAd->MlmeAux.AuthTimer, &TimerCancelled);
if (Status != MLME_SUCCESS)
{
pAd->StaCfg.AuthFailReason = Status;
COPY_MAC_ADDR(pAd->StaCfg.AuthFailSta, Addr2);
}
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
}
}
else
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - PeerAuthRspAtSeq4Action() sanity check fail\n"));
}
}
/*
==========================================================================
Description:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID MlmeDeauthReqAction(
IN PRTMP_ADAPTER pAd,
IN MLME_QUEUE_ELEM *Elem)
{
MLME_DEAUTH_REQ_STRUCT *pInfo;
HEADER_802_11 DeauthHdr;
PUCHAR pOutBuffer = NULL;
NDIS_STATUS NStatus;
ULONG FrameLen = 0;
USHORT Status;
pInfo = (MLME_DEAUTH_REQ_STRUCT *)Elem->Msg;
NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); //Get an unused nonpaged memory
if (NStatus != NDIS_STATUS_SUCCESS)
{
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - MlmeDeauthReqAction() allocate memory fail\n"));
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status = MLME_FAIL_NO_RESOURCE;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_DEAUTH_CONF, 2, &Status);
return;
}
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - Send DE-AUTH request (Reason=%d)...\n", pInfo->Reason));
MgtMacHeaderInit(pAd, &DeauthHdr, SUBTYPE_DEAUTH, 0, pInfo->Addr, pAd->MlmeAux.Bssid);
MakeOutgoingFrame(pOutBuffer, &FrameLen,
sizeof(HEADER_802_11),&DeauthHdr,
2, &pInfo->Reason,
END_OF_ARGS);
MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
MlmeFreeMemory(pAd, pOutBuffer);
pAd->StaCfg.DeauthReason = pInfo->Reason;
COPY_MAC_ADDR(pAd->StaCfg.DeauthSta, pInfo->Addr);
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status = MLME_SUCCESS;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_DEAUTH_CONF, 2, &Status);
// send wireless event - for deauthentication
if (pAd->CommonCfg.bWirelessEvent)
RTMPSendWirelessEvent(pAd, IW_DEAUTH_EVENT_FLAG, pAd->MacTab.Content[BSSID_WCID].Addr, BSS0, 0);
}
/*
==========================================================================
Description:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID AuthTimeoutAction(
IN PRTMP_ADAPTER pAd,
IN MLME_QUEUE_ELEM *Elem)
{
USHORT Status;
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - AuthTimeoutAction\n"));
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status = MLME_REJ_TIMEOUT;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
}
/*
==========================================================================
Description:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID InvalidStateWhenAuth(
IN PRTMP_ADAPTER pAd,
IN MLME_QUEUE_ELEM *Elem)
{
USHORT Status;
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - InvalidStateWhenAuth (state=%ld), reset AUTH state machine\n", pAd->Mlme.AuthMachine.CurrState));
pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
Status = MLME_STATE_MACHINE_REJECT;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
}
/*
==========================================================================
Description:
Some STA/AP
Note:
This action should never trigger AUTH state transition, therefore we
separate it from AUTH state machine, and make it as a standalone service
IRQL = DISPATCH_LEVEL
==========================================================================
*/
VOID Cls2errAction(
IN PRTMP_ADAPTER pAd,
IN PUCHAR pAddr)
{
HEADER_802_11 DeauthHdr;
PUCHAR pOutBuffer = NULL;
NDIS_STATUS NStatus;
ULONG FrameLen = 0;
USHORT Reason = REASON_CLS2ERR;
NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); //Get an unused nonpaged memory
if (NStatus != NDIS_STATUS_SUCCESS)
return;
DBGPRINT(RT_DEBUG_TRACE, ("AUTH - Class 2 error, Send DEAUTH frame...\n"));
MgtMacHeaderInit(pAd, &DeauthHdr, SUBTYPE_DEAUTH, 0, pAddr, pAd->MlmeAux.Bssid);
MakeOutgoingFrame(pOutBuffer, &FrameLen,
sizeof(HEADER_802_11),&DeauthHdr,
2, &Reason,
END_OF_ARGS);
MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
MlmeFreeMemory(pAd, pOutBuffer);
pAd->StaCfg.DeauthReason = Reason;
COPY_MAC_ADDR(pAd->StaCfg.DeauthSta, pAddr);
}
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