auth.c

ralink 2870 usb无线网卡 最新驱动

/*
 *************************************************************************
 * 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);
    RTMP_MLME_HANDLER(pAd);
}


/*
    ==========================================================================
    Description:
        
	IRQL = DISPATCH_LEVEL

    ==========================================================================
 */
VOID MlmeAuthReqAction(
    IN PRTMP_ADAPTER pAd, 
    IN MLME_QUEUE_ELEM *Elem) 
{
	if (AUTH_ReqSend(pAd, Elem, &pAd->MlmeAux.AuthTimer, "AUTH", 1, NULL, 0))
        pAd->Mlme.AuthMachine.CurrState = AUTH_WAIT_SEQ2;
    else 
    {
		USHORT Status;
		
        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, (PCHAR)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)
                {
                    pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
                    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 
            {
                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: