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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(struct rt_rtmp_adapter *pAd,
struct rt_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(void *SystemSpecific1,
void *FunctionContext,
void *SystemSpecific2, void *SystemSpecific3)
{
struct rt_rtmp_adapter *pAd = (struct rt_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(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
{
if (AUTH_ReqSend
(pAd, Elem, &pAd->MlmeAux.AuthTimer, "AUTH", 1, NULL, 0))
pAd->Mlme.AuthMachine.CurrState = AUTH_WAIT_SEQ2;
else {
u16 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(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
{
u8 Addr2[MAC_ADDR_LEN];
u16 Seq, Status, RemoteStatus, Alg;
u8 ChlgText[CIPHER_TEXT_LEN];
u8 CyperChlgText[CIPHER_TEXT_LEN + 8 + 8];
u8 Element[2];
struct rt_header_802_11 AuthHdr;
BOOLEAN TimerCancelled;
u8 *pOutBuffer = NULL;
int NStatus;
unsigned long FrameLen = 0;
u16 Status2;
if (PeerAuthSanity
(pAd, Elem->Msg, Elem->MsgLen, Addr2, &Alg, &Seq, &Status,
(char *)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(*(u16 *) & Alg);
Seq = cpu2le16(*(u16 *) & Seq);
RemoteStatus =
cpu2le16(*(u16 *) &
RemoteStatus);
RTMPEncryptData(pAd, (u8 *)& Alg,
CyperChlgText + 4, 2);
RTMPEncryptData(pAd, (u8 *)& Seq,
CyperChlgText + 6, 2);
RTMPEncryptData(pAd,
(u8 *)& 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(struct rt_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:
IRQL = DISPATCH_LEVEL
==========================================================================
*/
void PeerAuthRspAtSeq4Action(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
{
u8 Addr2[MAC_ADDR_LEN];
u16 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(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
{
struct rt_mlme_deauth_req *pInfo;
struct rt_header_802_11 DeauthHdr;
u8 *pOutBuffer = NULL;
int NStatus;
unsigned long FrameLen = 0;
u16 Status;
pInfo = (struct rt_mlme_deauth_req *)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(struct rt_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(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
{
u16 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(struct rt_rtmp_adapter *pAd, struct rt_mlme_queue_elem *Elem)
{
u16 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(struct rt_rtmp_adapter *pAd, u8 *pAddr)
{
struct rt_header_802_11 DeauthHdr;
u8 *pOutBuffer = NULL;
int NStatus;
unsigned long FrameLen = 0;
u16 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(struct rt_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);
}
BOOLEAN AUTH_ReqSend(struct rt_rtmp_adapter *pAd,
struct rt_mlme_queue_elem *pElem,
struct rt_ralink_timer *pAuthTimer,
char *pSMName,
u16 SeqNo,
u8 *pNewElement, unsigned long ElementLen)
{
u16 Alg, Seq, Status;
u8 Addr[6];
unsigned long Timeout;
struct rt_header_802_11 AuthHdr;
BOOLEAN TimerCancelled;
int NStatus;
u8 *pOutBuffer = NULL;
unsigned long FrameLen = 0, tmp = 0;
/* Block all authentication request durning WPA block period */
if (pAd->StaCfg.bBlockAssoc == TRUE) {
DBGPRINT(RT_DEBUG_TRACE,
("%s - Block Auth request durning WPA block period!\n",
pSMName));
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, pElem->Msg, pElem->MsgLen, Addr, &Timeout, &Alg)) {
/* reset timer */
RTMPCancelTimer(pAuthTimer, &TimerCancelled);
COPY_MAC_ADDR(pAd->MlmeAux.Bssid, Addr);
pAd->MlmeAux.Alg = Alg;
Seq = SeqNo;
Status = MLME_SUCCESS;
NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); /*Get an unused nonpaged memory */
if (NStatus != NDIS_STATUS_SUCCESS) {
DBGPRINT(RT_DEBUG_TRACE,
("%s - MlmeAuthReqAction(Alg:%d) allocate memory failed\n",
pSMName, 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 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;
}
|
