auth.c

r73模块的无线网卡在Linux下的驱动程序

/***************************************************************************
 * RT2x00 SourceForge Project - http://rt2x00.serialmonkey.com             *
 *                                                                         *
 *   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.             *
 *                                                                         *
 *   Licensed under the GNU GPL                                            *
 *   Original code supplied under license from RaLink Inc, 2004.           *
 ***************************************************************************/

/***************************************************************************
 *	Module Name:	auth.c
 *
 *	Abstract:
 *
 *	Revision History:
 *	Who		When		What
 *	--------	----------	-----------------------------
 *	Name		Date		Modification logs
 *	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_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
    ==========================================================================
 */

VOID AuthStateMachineInit(
    IN PRTMP_ADAPTER pAd,
    IN PSTATE_MACHINE Sm,
    OUT STATE_MACHINE_FUNC Trans[])
{
    StateMachineInit(Sm, (STATE_MACHINE_FUNC*)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);

    // timer init
    RTMPInitTimer(pAd, &pAd->MlmeAux.AuthTimer, &AuthTimeout);

}

/*
    ==========================================================================
    Description:
        function to be executed at timer thread when auth timer expires
    ==========================================================================
 */
VOID AuthTimeout(
    IN	unsigned long data)
{
    RTMP_ADAPTER *pAd = (RTMP_ADAPTER *)data;

    DBGPRINT(RT_DEBUG_TRACE,"AUTH - AuthTimeout\n");
    MlmeEnqueue(pAd, AUTH_STATE_MACHINE, MT2_AUTH_TIMEOUT, 0, NULL);
    RTUSBMlmeUp(pAd);
}

/*
    ==========================================================================
    Description:
    ==========================================================================
 */
VOID MlmeAuthReqAction(
    IN PRTMP_ADAPTER pAd,
    IN MLME_QUEUE_ELEM *Elem)
{
    UCHAR               Addr[MAC_ADDR_LEN];
    USHORT              Alg, Seq, Status;
    ULONG               Timeout;
    HEADER_802_11       AuthHdr;
    PUCHAR              pOutBuffer = NULL;
    ULONG               FrameLen = 0;
    USHORT              NStatus;

    // 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;
        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))
    {
	RTMPCancelTimer(&pAd->MlmeAux.AuthTimer);

        COPY_MAC_ADDR(pAd->MlmeAux.Bssid, Addr);
        pAd->MlmeAux.Alg  = Alg;

        Seq = 1;
        Status = MLME_SUCCESS;

        // allocate and send out AuthReq frame
        NStatus = MlmeAllocateMemory(pAd, (PVOID)&pOutBuffer);  //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;
            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)  %d...\n", Alg, pAd->LatchRfRegs.Channel);
        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, pOutBuffer, FrameLen);

        RTMPSetTimer(pAd, &pAd->MlmeAux.AuthTimer, AUTH_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;
        Status = MLME_INVALID_FORMAT;
        MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
    }
}

/*
    ==========================================================================
    Description:
    ==========================================================================
 */
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;
    PUCHAR          pOutBuffer = NULL;
    ULONG           FrameLen = 0;
    USHORT          Status2;
    USHORT          NStatus;

    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);

            if (Status == MLME_SUCCESS)
            {
                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;
                    // allocate and send out AuthRsp frame
                    NStatus = MlmeAllocateMemory(pAd, (PVOID)&pOutBuffer);  //Get an unused nonpaged memory
                    if (NStatus != NDIS_STATUS_SUCCESS)
                    {
                        DBGPRINT(RT_DEBUG_TRACE, "AUTH - PeerAuthRspAtSeq2Action() allocate memory fail\n");
                        pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;