304 lines
7.3 KiB
C
304 lines
7.3 KiB
C
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/********************************************************************/
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/** Copyright(c) 1989 Microsoft Corporation. **/
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/********************************************************************/
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//***
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//
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// Filename: callback.c
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//
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// Description: Contains FSM code to handle and callback control protocol
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//
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// History:
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// April 11,1993. NarenG Created original version.
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//
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h> // needed for winbase.h
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#include <windows.h> // Win32 base API's
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include <lmcons.h>
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#include <raserror.h>
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#include <rasman.h>
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#include <rasppp.h>
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#include <pppcp.h>
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#include <ppp.h>
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#include <auth.h>
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#include <callback.h>
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#include <smevents.h>
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#include <smaction.h>
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#include <lcp.h>
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#include <timer.h>
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#include <rtutils.h>
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#include <util.h>
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#include <worker.h>
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//**
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//
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// Call: CbStart
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//
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// Returns: none
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//
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// Description: Called to initiatialze the callback control protocol and to
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// initiate to callback negotiation.
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//
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VOID
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CbStart(
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IN PCB * pPcb,
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IN DWORD CpIndex
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)
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{
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DWORD dwRetCode;
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PPPCB_INPUT PppCbInput;
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CPCB * pCpCb = GetPointerToCPCB( pPcb, CpIndex );
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if ( NULL == pCpCb )
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{
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return;
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}
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PppCbInput.fServer = pPcb->fFlags & PCBFLAG_IS_SERVER;
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PppCbInput.bfCallbackPrivilege = (BYTE)(pPcb->fCallbackPrivilege);
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PppCbInput.CallbackDelay = ( pPcb->ConfigInfo.dwConfigMask &
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PPPCFG_UseCallbackDelay )
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? pPcb->ConfigInfo.dwCallbackDelay
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: PppConfigInfo.dwCallbackDelay;
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PppCbInput.pszCallbackNumber = pPcb->szCallbackNumber;
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PppLog( 2, "CallbackPriv in CB = %x", PppCbInput.bfCallbackPrivilege );
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dwRetCode = (CpTable[CpIndex].CpInfo.RasCpBegin)(&(pCpCb->pWorkBuf),
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&PppCbInput);
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if ( dwRetCode != NO_ERROR )
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{
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pPcb->LcpCb.dwError = dwRetCode;
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NotifyCallerOfFailure( pPcb, dwRetCode );
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return;
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}
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pCpCb->LastId = (DWORD)-1;
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InitRestartCounters( pPcb, pCpCb );
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CbWork( pPcb, CpIndex, NULL, NULL );
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}
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//**
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//
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// Call: CbStop
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//
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// Returns: none
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//
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// Description: Called to stop the callback control protocol machine.
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//
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VOID
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CbStop(
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IN PCB * pPcb,
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IN DWORD CpIndex
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)
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{
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CPCB * pCpCb = GetPointerToCPCB( pPcb, CpIndex );
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if ( NULL == pCpCb )
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{
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return;
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}
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if ( pCpCb->LastId != (DWORD)-1 )
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{
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RemoveFromTimerQ(
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pPcb->dwPortId,
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pCpCb->LastId,
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CpTable[CpIndex].CpInfo.Protocol,
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FALSE,
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TIMER_EVENT_TIMEOUT );
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}
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if ( pCpCb->pWorkBuf != NULL )
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{
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(CpTable[CpIndex].CpInfo.RasCpEnd)( pCpCb->pWorkBuf );
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pCpCb->pWorkBuf = NULL;
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}
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}
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//**
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//
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// Call: CbWork
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//
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// Returns: none
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//
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// Description: Called when and callback control protocol packet was received or
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// a timeout ocurred or to initiate callback negotiation.
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//
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VOID
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CbWork(
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IN PCB * pPcb,
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IN DWORD CpIndex,
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IN PPP_CONFIG * pRecvConfig,
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IN PPPCB_INPUT * pCbInput
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)
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{
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DWORD dwRetCode;
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CPCB * pCpCb = GetPointerToCPCB( pPcb, CpIndex );
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PPP_CONFIG * pSendConfig = (PPP_CONFIG*)(pPcb->pSendBuf->Information);
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PPPCB_RESULT CbResult;
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DWORD dwLength;
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if ( NULL == pCpCb )
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{
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return;
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}
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PPP_ASSERT( NULL != pCpCb->pWorkBuf );
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dwRetCode = (CpTable[CpIndex].CpInfo.RasApMakeMessage)(
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pCpCb->pWorkBuf,
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pRecvConfig,
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pSendConfig,
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LCP_DEFAULT_MRU
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- PPP_PACKET_HDR_LEN,
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(PPPAP_RESULT*)&CbResult,
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(PPPAP_INPUT*)pCbInput );
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if ( dwRetCode != NO_ERROR )
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{
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if ( dwRetCode == ERROR_PPP_INVALID_PACKET )
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{
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PppLog(1,
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"Silently discarding invalid callback packet on port %d",
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pPcb->hPort );
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return;
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}
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else
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{
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pPcb->LcpCb.dwError = dwRetCode;
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NotifyCallerOfFailure( pPcb, dwRetCode );
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return;
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}
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}
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switch( CbResult.Action )
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{
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case APA_Send:
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case APA_SendWithTimeout:
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case APA_SendWithTimeout2:
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case APA_SendAndDone:
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HostToWireFormat16( (WORD)CpTable[CpIndex].CpInfo.Protocol,
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(PBYTE)(pPcb->pSendBuf->Protocol) );
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dwLength = WireToHostFormat16( pSendConfig->Length );
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LogPPPPacket(FALSE,pPcb,pPcb->pSendBuf,dwLength+PPP_PACKET_HDR_LEN);
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if ( ( dwRetCode = PortSendOrDisconnect( pPcb,
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(dwLength + PPP_PACKET_HDR_LEN)))
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!= NO_ERROR )
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{
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return;
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}
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pCpCb->LastId = (DWORD)-1;
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if ( ( CbResult.Action == APA_SendWithTimeout ) ||
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( CbResult.Action == APA_SendWithTimeout2 ) )
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{
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pCpCb->LastId = CbResult.bIdExpected;
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InsertInTimerQ( pPcb->dwPortId,
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pPcb->hPort,
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pCpCb->LastId,
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CpTable[CpIndex].CpInfo.Protocol,
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FALSE,
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TIMER_EVENT_TIMEOUT,
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pPcb->RestartTimer );
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//
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// For SendWithTimeout2 we increment the ConfigRetryCount. This
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// means send with infinite retry count
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//
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if ( CbResult.Action == APA_SendWithTimeout2 )
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{
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(pCpCb->ConfigRetryCount)++;
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}
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}
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if ( CbResult.Action != APA_SendAndDone )
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break;
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case APA_Done:
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if ( CbResult.bfCallbackPrivilege == RASPRIV_NoCallback )
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{
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//
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// If no callback was negotiated we continue on to the next
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// phase.
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//
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FsmThisLayerUp( pPcb, CpIndex );
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}
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else
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{
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if ( pPcb->fFlags & PCBFLAG_IS_SERVER )
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{
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//
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// If we are the server side we save the callback info
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//
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strcpy( pPcb->szCallbackNumber, CbResult.szCallbackNumber );
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pPcb->ConfigInfo.dwCallbackDelay = CbResult.CallbackDelay;
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}
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else
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{
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//
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// We are the client side so, we tell the server that we
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// bringing the link down and we tell the client to
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// prepare for callback
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//
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FsmClose( pPcb, LCP_INDEX );
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}
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pPcb->fFlags |= PCBFLAG_DOING_CALLBACK;
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}
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break;
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case APA_NoAction:
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//
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// If we are on the client then we need to get the callback number
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// from the user.
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//
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if ( ( !(pPcb->fFlags & PCBFLAG_IS_SERVER) &&
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( CbResult.fGetCallbackNumberFromUser ) ) )
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{
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NotifyCaller( pPcb, PPPMSG_CallbackRequest, NULL );
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}
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break;
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default:
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break;
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}
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}
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