auth.c

台湾RALink公司的 rt2570无线 802.11g 网卡的 驱动的源代码 ,支持linux2.4以上的 内河

/*
 ***************************************************************************
 * Ralink Tech Inc.
 * 4F, No. 2 Technology 5th Rd.
 * Science-based Industrial Park
 * Hsin-chu, Taiwan, R.O.C.
 *
 * (c) Copyright 2002-2004, 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
	--------	----------		----------------------------------------------
	Name		Date			Modification logs
	Jan Lee		2005-06-01		Release
*/
#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_MLME_DEAUTH_REQ mlme_deauth_req_action  mlme_deauth_req_action           mlme_deauth_req_action
    MT2_CLS2ERR         cls2err_action          cls2err_action                   cls2err_action
    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 PRT2570ADAPTER 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);
//  StateMachineSetAction(Sm, AUTH_REQ_IDLE, MT2_MLME_DEAUTH_REQ, MlmeDeauthReqAction);
//  StateMachineSetAction(Sm, AUTH_REQ_IDLE, MT2_CLS2ERR, Cls2errAction);

    // the second column
    StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_MLME_AUTH_REQ, (STATE_MACHINE_FUNC)InvalidStateWhenAuth);
//  StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_MLME_DEAUTH_REQ, MlmeDeauthReqAction);
//  StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_CLS2ERR, Cls2errAction);
    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_MLME_DEAUTH_REQ, MlmeDeauthReqAction);
//  StateMachineSetAction(Sm, AUTH_WAIT_SEQ4, MT2_CLS2ERR, Cls2errAction);
    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->Mlme.AuthAux.AuthTimer, AuthTimeout);
}

/*
    ==========================================================================
    Description:
        function to be executed at timer thread when auth timer expires
        
	IRQL = DISPATCH_LEVEL

    ==========================================================================
 */
VOID  AuthTimeout(unsigned long data)
{
	PRT2570ADAPTER	pAd = (PRT2570ADAPTER)data;

	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))
		return;

	MlmeEnqueue(pAd, AUTH_STATE_MACHINE, MT2_AUTH_TIMEOUT, 0, NULL);
	RTUSBUp(pAd, &pAd->mlme_semaphore);
}

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

    ==========================================================================
 */
VOID MlmeAuthReqAction(
    IN PRT2570ADAPTER pAd, 
    IN MLME_QUEUE_ELEM *Elem) 
{
	MACADDR            Addr;
	USHORT             Alg, Seq, Status;
	ULONG              Timeout;
	MACHDR             AuthHdr;
	NDIS_STATUS        NStatus;
	UCHAR             *OutBuffer = NULL;
	ULONG              FrameLen = 0;

	// Block all authentication request durning WPA block period
	if (pAd->PortCfg.bBlockAssoc == TRUE)
	{
		DBGPRINT(RT_DEBUG_TRACE, "AUTH - Block Auth request durning WPA block period!\n");
		pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
		MlmeCntlConfirm(pAd, MT2_AUTH_CONF, MLME_STATE_MACHINE_REJECT);
	}	
	else if(MlmeAuthReqSanity(pAd, Elem->Msg, Elem->MsgLen, &Addr, &Timeout, &Alg)) 
	{
		// reset timer
		RTMPCancelTimer(&pAd->Mlme.AuthAux.AuthTimer);
		pAd->Mlme.AuthAux.Addr = Addr;
		pAd->Mlme.AuthAux.Alg  = Alg;
		pAd->PortCfg.Mauth = FALSE;
		Seq = 1;
		Status = MLME_SUCCESS;

		NStatus = MlmeAllocateMemory(pAd, (PVOID)&OutBuffer);  //Get an unused nonpaged memory
		if(NStatus != NDIS_STATUS_SUCCESS) 
		{
			DBGPRINT(RT_DEBUG_TRACE, "AUTH - MlmeAuthReqAction() allocate memory failed\n");
			pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
			MlmeCntlConfirm(pAd, MT2_AUTH_CONF, MLME_FAIL_NO_RESOURCE);
			return;
		}

		DBGPRINT(RT_DEBUG_INFO, "AUTH - Send AUTH request seq#1 (Alg=%d)...\n", Alg);
		MgtMacHeaderInit(pAd, &AuthHdr, SUBTYPE_AUTH, 0, &Addr, &pAd->PortCfg.Bssid);
		MakeOutgoingFrame(OutBuffer,            &FrameLen, 
		              MAC_HDR_LEN,          &AuthHdr, 
		              2,                    &Alg, 
		              2,                    &Seq, 
		              2,                    &Status, 
		              END_OF_ARGS);
		MiniportMMRequest(pAd, OutBuffer, FrameLen);

		RTMPSetTimer(pAd, &pAd->Mlme.AuthAux.AuthTimer, Timeout);
		pAd->Mlme.AuthMachine.CurrState = AUTH_WAIT_SEQ2;
	} 
	else 
	{
		DBGPRINT(RT_DEBUG_ERROR, "AUTH - MlmeAuthReqAction() sanity check failed. BUG!!!!!\n");
		pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
		MlmeCntlConfirm(pAd, MT2_AUTH_CONF, MLME_INVALID_FORMAT);
	}
}

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

    ==========================================================================
 */
VOID PeerAuthRspAtSeq2Action(
    IN PRT2570ADAPTER pAd, 
    IN MLME_QUEUE_ELEM *Elem) 
{
    MACADDR       Addr2;
    USHORT        Seq, Status, RemoteStatus, Alg;
    UCHAR         ChlgText[CIPHER_TEXT_LEN];
    UCHAR         CyperChlgText[CIPHER_TEXT_LEN + 8 + 8];
    UCHAR         Element[2];
    MACHDR        AuthHdr;
    UCHAR        *OutBuffer = NULL;
    NDIS_STATUS   NStatus;
    ULONG         FrameLen = 0;

    if (PeerAuthSanity(pAd, Elem->Msg, Elem->MsgLen, &Addr2, &Alg, &Seq, &Status, ChlgText)) 
    {
        if (MAC_ADDR_EQUAL(&pAd->Mlme.AuthAux.Addr, &Addr2) && Seq == 2) 
        {
            DBGPRINT(RT_DEBUG_TRACE, "AUTH - Receive AUTH_RSP seq#2 to me (Alg=%d, Status=%d)\n", Alg, Status);
            RTMPCancelTimer(&pAd->Mlme.AuthAux.AuthTimer);
            
            if (Status == MLME_SUCCESS) 
            {
                if (pAd->Mlme.AuthAux.Alg == Ndis802_11AuthModeOpen) 
                {
                    pAd->PortCfg.Mauth = TRUE;
                    pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
                    MlmeCntlConfirm(pAd, MT2_AUTH_CONF, MLME_SUCCESS);