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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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