518 lines
16 KiB
C
518 lines
16 KiB
C
/*
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*************************************************************************
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* Ralink Tech Inc.
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* 5F., No.36, Taiyuan St., Jhubei City,
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* Hsinchu County 302,
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* Taiwan, R.O.C.
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*
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* (c) Copyright 2002-2007, Ralink Technology, Inc.
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*
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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* *
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*************************************************************************
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Module Name:
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auth.c
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Abstract:
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Revision History:
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Who When What
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-------- ---------- ----------------------------------------------
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John 2004-9-3 porting from RT2500
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*/
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#include "../rt_config.h"
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/*
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==========================================================================
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Description:
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authenticate state machine init, including state transition and timer init
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Parameters:
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Sm - pointer to the auth state machine
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Note:
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The state machine looks like this
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AUTH_REQ_IDLE AUTH_WAIT_SEQ2 AUTH_WAIT_SEQ4
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MT2_MLME_AUTH_REQ mlme_auth_req_action invalid_state_when_auth invalid_state_when_auth
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MT2_PEER_AUTH_EVEN drop peer_auth_even_at_seq2_action peer_auth_even_at_seq4_action
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MT2_AUTH_TIMEOUT Drop auth_timeout_action auth_timeout_action
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IRQL = PASSIVE_LEVEL
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==========================================================================
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*/
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void AuthStateMachineInit(struct rt_rtmp_adapter *pAd,
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struct rt_state_machine *Sm, OUT STATE_MACHINE_FUNC Trans[])
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{
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StateMachineInit(Sm, Trans, MAX_AUTH_STATE, MAX_AUTH_MSG,
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(STATE_MACHINE_FUNC) Drop, AUTH_REQ_IDLE,
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AUTH_MACHINE_BASE);
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/* the first column */
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StateMachineSetAction(Sm, AUTH_REQ_IDLE, MT2_MLME_AUTH_REQ,
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(STATE_MACHINE_FUNC) MlmeAuthReqAction);
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/* the second column */
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StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_MLME_AUTH_REQ,
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(STATE_MACHINE_FUNC) InvalidStateWhenAuth);
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StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_PEER_AUTH_EVEN,
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(STATE_MACHINE_FUNC) PeerAuthRspAtSeq2Action);
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StateMachineSetAction(Sm, AUTH_WAIT_SEQ2, MT2_AUTH_TIMEOUT,
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(STATE_MACHINE_FUNC) AuthTimeoutAction);
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/* the third column */
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StateMachineSetAction(Sm, AUTH_WAIT_SEQ4, MT2_MLME_AUTH_REQ,
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(STATE_MACHINE_FUNC) InvalidStateWhenAuth);
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StateMachineSetAction(Sm, AUTH_WAIT_SEQ4, MT2_PEER_AUTH_EVEN,
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(STATE_MACHINE_FUNC) PeerAuthRspAtSeq4Action);
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StateMachineSetAction(Sm, AUTH_WAIT_SEQ4, MT2_AUTH_TIMEOUT,
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(STATE_MACHINE_FUNC) AuthTimeoutAction);
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RTMPInitTimer(pAd, &pAd->MlmeAux.AuthTimer,
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GET_TIMER_FUNCTION(AuthTimeout), pAd, FALSE);
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}
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/*
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==========================================================================
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Description:
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function to be executed at timer thread when auth timer expires
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void AuthTimeout(void *SystemSpecific1,
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void *FunctionContext,
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void *SystemSpecific2, void *SystemSpecific3)
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{
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struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)FunctionContext;
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DBGPRINT(RT_DEBUG_TRACE, ("AUTH - AuthTimeout\n"));
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/* Do nothing if the driver is starting halt state. */
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/* This might happen when timer already been fired before cancel timer with mlmehalt */
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if (RTMP_TEST_FLAG
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(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
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return;
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/* send a de-auth to reset AP's state machine (Patch AP-Dir635) */
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if (pAd->Mlme.AuthMachine.CurrState == AUTH_WAIT_SEQ2)
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Cls2errAction(pAd, pAd->MlmeAux.Bssid);
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MlmeEnqueue(pAd, AUTH_STATE_MACHINE, MT2_AUTH_TIMEOUT, 0, NULL);
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RTMP_MLME_HANDLER(pAd);
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}
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/*
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==========================================================================
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Description:
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void MlmeAuthReqAction(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
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{
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if (AUTH_ReqSend
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(pAd, Elem, &pAd->MlmeAux.AuthTimer, "AUTH", 1, NULL, 0))
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pAd->Mlme.AuthMachine.CurrState = AUTH_WAIT_SEQ2;
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else {
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u16 Status;
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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Status = MLME_INVALID_FORMAT;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2,
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&Status);
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}
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}
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/*
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==========================================================================
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Description:
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void PeerAuthRspAtSeq2Action(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
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{
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u8 Addr2[MAC_ADDR_LEN];
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u16 Seq, Status, RemoteStatus, Alg;
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u8 ChlgText[CIPHER_TEXT_LEN];
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u8 CyperChlgText[CIPHER_TEXT_LEN + 8 + 8];
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u8 Element[2];
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struct rt_header_802_11 AuthHdr;
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BOOLEAN TimerCancelled;
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u8 *pOutBuffer = NULL;
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int NStatus;
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unsigned long FrameLen = 0;
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u16 Status2;
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if (PeerAuthSanity
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(pAd, Elem->Msg, Elem->MsgLen, Addr2, &Alg, &Seq, &Status,
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(char *)ChlgText)) {
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if (MAC_ADDR_EQUAL(pAd->MlmeAux.Bssid, Addr2) && Seq == 2) {
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - Receive AUTH_RSP seq#2 to me (Alg=%d, Status=%d)\n",
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Alg, Status));
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RTMPCancelTimer(&pAd->MlmeAux.AuthTimer,
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&TimerCancelled);
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if (Status == MLME_SUCCESS) {
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/* Authentication Mode "LEAP" has allow for CCX 1.X */
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if (pAd->MlmeAux.Alg == Ndis802_11AuthModeOpen) {
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pAd->Mlme.AuthMachine.CurrState =
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AUTH_REQ_IDLE;
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MlmeEnqueue(pAd,
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MLME_CNTL_STATE_MACHINE,
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MT2_AUTH_CONF, 2, &Status);
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} else {
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/* 2. shared key, need to be challenged */
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Seq++;
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RemoteStatus = MLME_SUCCESS;
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/* Get an unused nonpaged memory */
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NStatus =
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MlmeAllocateMemory(pAd,
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&pOutBuffer);
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if (NStatus != NDIS_STATUS_SUCCESS) {
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - PeerAuthRspAtSeq2Action() allocate memory fail\n"));
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pAd->Mlme.AuthMachine.
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CurrState = AUTH_REQ_IDLE;
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Status2 = MLME_FAIL_NO_RESOURCE;
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MlmeEnqueue(pAd,
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MLME_CNTL_STATE_MACHINE,
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MT2_AUTH_CONF, 2,
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&Status2);
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return;
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}
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - Send AUTH request seq#3...\n"));
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MgtMacHeaderInit(pAd, &AuthHdr,
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SUBTYPE_AUTH, 0, Addr2,
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pAd->MlmeAux.Bssid);
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AuthHdr.FC.Wep = 1;
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/* Encrypt challenge text & auth information */
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RTMPInitWepEngine(pAd,
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pAd->
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SharedKey[BSS0][pAd->
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StaCfg.
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DefaultKeyId].
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Key,
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pAd->StaCfg.
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DefaultKeyId,
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pAd->
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SharedKey[BSS0][pAd->
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StaCfg.
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DefaultKeyId].
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KeyLen,
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CyperChlgText);
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Alg = cpu2le16(*(u16 *) & Alg);
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Seq = cpu2le16(*(u16 *) & Seq);
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RemoteStatus =
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cpu2le16(*(u16 *) &
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RemoteStatus);
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RTMPEncryptData(pAd, (u8 *)& Alg,
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CyperChlgText + 4, 2);
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RTMPEncryptData(pAd, (u8 *)& Seq,
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CyperChlgText + 6, 2);
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RTMPEncryptData(pAd,
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(u8 *)& RemoteStatus,
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CyperChlgText + 8, 2);
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Element[0] = 16;
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Element[1] = 128;
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RTMPEncryptData(pAd, Element,
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CyperChlgText + 10, 2);
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RTMPEncryptData(pAd, ChlgText,
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CyperChlgText + 12,
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128);
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RTMPSetICV(pAd, CyperChlgText + 140);
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MakeOutgoingFrame(pOutBuffer, &FrameLen,
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sizeof(struct rt_header_802_11),
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&AuthHdr,
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CIPHER_TEXT_LEN + 16,
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CyperChlgText,
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END_OF_ARGS);
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MiniportMMRequest(pAd, 0, pOutBuffer,
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FrameLen);
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MlmeFreeMemory(pAd, pOutBuffer);
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RTMPSetTimer(&pAd->MlmeAux.AuthTimer,
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AUTH_TIMEOUT);
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pAd->Mlme.AuthMachine.CurrState =
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AUTH_WAIT_SEQ4;
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}
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} else {
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pAd->StaCfg.AuthFailReason = Status;
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COPY_MAC_ADDR(pAd->StaCfg.AuthFailSta, Addr2);
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE,
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MT2_AUTH_CONF, 2, &Status);
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}
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}
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} else {
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - PeerAuthSanity() sanity check fail\n"));
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}
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}
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/*
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==========================================================================
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Description:
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void PeerAuthRspAtSeq4Action(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
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{
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u8 Addr2[MAC_ADDR_LEN];
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u16 Alg, Seq, Status;
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char ChlgText[CIPHER_TEXT_LEN];
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BOOLEAN TimerCancelled;
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if (PeerAuthSanity
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(pAd, Elem->Msg, Elem->MsgLen, Addr2, &Alg, &Seq, &Status,
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ChlgText)) {
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if (MAC_ADDR_EQUAL(pAd->MlmeAux.Bssid, Addr2) && Seq == 4) {
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - Receive AUTH_RSP seq#4 to me\n"));
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RTMPCancelTimer(&pAd->MlmeAux.AuthTimer,
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&TimerCancelled);
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if (Status != MLME_SUCCESS) {
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pAd->StaCfg.AuthFailReason = Status;
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COPY_MAC_ADDR(pAd->StaCfg.AuthFailSta, Addr2);
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}
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF,
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2, &Status);
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}
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} else {
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - PeerAuthRspAtSeq4Action() sanity check fail\n"));
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}
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}
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/*
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==========================================================================
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Description:
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void MlmeDeauthReqAction(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
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{
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struct rt_mlme_deauth_req *pInfo;
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struct rt_header_802_11 DeauthHdr;
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u8 *pOutBuffer = NULL;
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int NStatus;
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unsigned long FrameLen = 0;
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u16 Status;
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pInfo = (struct rt_mlme_deauth_req *)Elem->Msg;
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NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); /*Get an unused nonpaged memory */
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if (NStatus != NDIS_STATUS_SUCCESS) {
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - MlmeDeauthReqAction() allocate memory fail\n"));
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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Status = MLME_FAIL_NO_RESOURCE;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_DEAUTH_CONF, 2,
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&Status);
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return;
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}
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - Send DE-AUTH request (Reason=%d)...\n",
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pInfo->Reason));
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MgtMacHeaderInit(pAd, &DeauthHdr, SUBTYPE_DEAUTH, 0, pInfo->Addr,
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pAd->MlmeAux.Bssid);
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MakeOutgoingFrame(pOutBuffer, &FrameLen, sizeof(struct rt_header_802_11),
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&DeauthHdr, 2, &pInfo->Reason, END_OF_ARGS);
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MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
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MlmeFreeMemory(pAd, pOutBuffer);
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pAd->StaCfg.DeauthReason = pInfo->Reason;
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COPY_MAC_ADDR(pAd->StaCfg.DeauthSta, pInfo->Addr);
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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Status = MLME_SUCCESS;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_DEAUTH_CONF, 2, &Status);
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/* send wireless event - for deauthentication */
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if (pAd->CommonCfg.bWirelessEvent)
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RTMPSendWirelessEvent(pAd, IW_DEAUTH_EVENT_FLAG,
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pAd->MacTab.Content[BSSID_WCID].Addr,
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BSS0, 0);
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}
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/*
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==========================================================================
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Description:
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void AuthTimeoutAction(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
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{
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u16 Status;
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DBGPRINT(RT_DEBUG_TRACE, ("AUTH - AuthTimeoutAction\n"));
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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Status = MLME_REJ_TIMEOUT;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
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}
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/*
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==========================================================================
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Description:
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void InvalidStateWhenAuth(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
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{
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u16 Status;
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - InvalidStateWhenAuth (state=%ld), reset AUTH state machine\n",
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pAd->Mlme.AuthMachine.CurrState));
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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Status = MLME_STATE_MACHINE_REJECT;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2, &Status);
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}
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/*
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==========================================================================
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Description:
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Some STA/AP
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Note:
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This action should never trigger AUTH state transition, therefore we
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separate it from AUTH state machine, and make it as a standalone service
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IRQL = DISPATCH_LEVEL
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==========================================================================
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*/
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void Cls2errAction(struct rt_rtmp_adapter *pAd, u8 *pAddr)
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{
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struct rt_header_802_11 DeauthHdr;
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u8 *pOutBuffer = NULL;
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int NStatus;
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unsigned long FrameLen = 0;
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u16 Reason = REASON_CLS2ERR;
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NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); /*Get an unused nonpaged memory */
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if (NStatus != NDIS_STATUS_SUCCESS)
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return;
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DBGPRINT(RT_DEBUG_TRACE,
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("AUTH - Class 2 error, Send DEAUTH frame...\n"));
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MgtMacHeaderInit(pAd, &DeauthHdr, SUBTYPE_DEAUTH, 0, pAddr,
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pAd->MlmeAux.Bssid);
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MakeOutgoingFrame(pOutBuffer, &FrameLen, sizeof(struct rt_header_802_11),
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&DeauthHdr, 2, &Reason, END_OF_ARGS);
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MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
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MlmeFreeMemory(pAd, pOutBuffer);
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pAd->StaCfg.DeauthReason = Reason;
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COPY_MAC_ADDR(pAd->StaCfg.DeauthSta, pAddr);
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}
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BOOLEAN AUTH_ReqSend(struct rt_rtmp_adapter *pAd,
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struct rt_mlme_queue_elem *pElem,
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struct rt_ralink_timer *pAuthTimer,
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char *pSMName,
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u16 SeqNo,
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u8 *pNewElement, unsigned long ElementLen)
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{
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u16 Alg, Seq, Status;
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u8 Addr[6];
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unsigned long Timeout;
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struct rt_header_802_11 AuthHdr;
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BOOLEAN TimerCancelled;
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int NStatus;
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u8 *pOutBuffer = NULL;
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unsigned long FrameLen = 0, tmp = 0;
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/* Block all authentication request durning WPA block period */
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if (pAd->StaCfg.bBlockAssoc == TRUE) {
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DBGPRINT(RT_DEBUG_TRACE,
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("%s - Block Auth request durning WPA block period!\n",
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pSMName));
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
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Status = MLME_STATE_MACHINE_REJECT;
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MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF, 2,
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&Status);
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} else
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if (MlmeAuthReqSanity
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(pAd, pElem->Msg, pElem->MsgLen, Addr, &Timeout, &Alg)) {
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/* reset timer */
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RTMPCancelTimer(pAuthTimer, &TimerCancelled);
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COPY_MAC_ADDR(pAd->MlmeAux.Bssid, Addr);
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pAd->MlmeAux.Alg = Alg;
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Seq = SeqNo;
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Status = MLME_SUCCESS;
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NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); /*Get an unused nonpaged memory */
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if (NStatus != NDIS_STATUS_SUCCESS) {
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DBGPRINT(RT_DEBUG_TRACE,
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("%s - MlmeAuthReqAction(Alg:%d) allocate memory failed\n",
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pSMName, Alg));
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pAd->Mlme.AuthMachine.CurrState = AUTH_REQ_IDLE;
|
|
Status = MLME_FAIL_NO_RESOURCE;
|
|
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_AUTH_CONF,
|
|
2, &Status);
|
|
return FALSE;
|
|
}
|
|
|
|
DBGPRINT(RT_DEBUG_TRACE,
|
|
("%s - Send AUTH request seq#1 (Alg=%d)...\n", pSMName,
|
|
Alg));
|
|
MgtMacHeaderInit(pAd, &AuthHdr, SUBTYPE_AUTH, 0, Addr,
|
|
pAd->MlmeAux.Bssid);
|
|
MakeOutgoingFrame(pOutBuffer, &FrameLen, sizeof(struct rt_header_802_11),
|
|
&AuthHdr, 2, &Alg, 2, &Seq, 2, &Status,
|
|
END_OF_ARGS);
|
|
|
|
if (pNewElement && ElementLen) {
|
|
MakeOutgoingFrame(pOutBuffer + FrameLen, &tmp,
|
|
ElementLen, pNewElement, END_OF_ARGS);
|
|
FrameLen += tmp;
|
|
}
|
|
|
|
MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
|
|
MlmeFreeMemory(pAd, pOutBuffer);
|
|
|
|
RTMPSetTimer(pAuthTimer, Timeout);
|
|
return TRUE;
|
|
} else {
|
|
DBGPRINT_ERR(("%s - MlmeAuthReqAction() sanity check failed\n",
|
|
pSMName));
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|