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1069 lines
26 KiB
1069 lines
26 KiB
/********************************************************************/
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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: smevents.c
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//
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// Description: This module contain the events processing code for the
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// Finite State Machine for PPP.
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//
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// History:
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// Oct 25,1993. NarenG Created Original version.
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//
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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 <rasauth.h>
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#include <raseapif.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 <rtutils.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 <smaction.h>
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#include <smevents.h>
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#include <receive.h>
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#include <auth.h>
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#include <callback.h>
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#include <lcp.h>
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#include <timer.h>
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#include <util.h>
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#include <worker.h>
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#include <bap.h>
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static VOID (*ProcessPacket[])( PCB * pPcb,
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DWORD CpIndex,
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CPCB * pCpCb,
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PPP_CONFIG * pRecvConfig ) =
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{
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NULL,
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ReceiveConfigReq,
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ReceiveConfigAck,
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ReceiveConfigNakRej,
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ReceiveConfigNakRej,
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ReceiveTermReq,
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ReceiveTermAck,
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ReceiveCodeRej,
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NULL,
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ReceiveEchoReq,
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ReceiveEchoReply,
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ReceiveDiscardReq,
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ReceiveIdentification,
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ReceiveTimeRemaining
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};
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/************************************************************************/
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/* E V E N T P R O C E S S I N G */
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/************************************************************************/
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//**
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//
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// Call: FsmUp
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//
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// Returns: none.
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//
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// Description: This is called after a Line Up event occurs.
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//
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VOID
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FsmUp(
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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 ( pCpCb == NULL )
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{
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return;
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}
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PppLog( 2, "FsmUp event received for protocol %x on port %d",
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CpTable[CpIndex].CpInfo.Protocol, pPcb->hPort );
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if ( CpIndex == LCP_INDEX )
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{
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pPcb->PppPhase = PPP_LCP;
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}
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switch( pCpCb->State )
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{
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case FSM_INITIAL:
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pCpCb->State = FSM_CLOSED;
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break;
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case FSM_STARTING:
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InitRestartCounters( pPcb, pCpCb );
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if ( !FsmSendConfigReq( pPcb, CpIndex, FALSE ) )
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{
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//
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// If we couldn't even send the first configure request, we mark
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// this protocol as NOT CONFIGURABLE so that we protocol reject
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// this layer. We need to do this since FsmClose will not send
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// a terminate request in this state (as per the PPP FSM) and we
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// want to terminate this layer gracefully instead of simply
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// dropping all the clients packets and having the client
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// timeout.
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//
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pCpCb->fConfigurable = FALSE;
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return;
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}
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pCpCb->State = FSM_REQ_SENT;
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break;
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default:
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//
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// Already started
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//
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PPP_ASSERT( pCpCb->State < 10 );
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PppLog( 2, "Illegal transition -> FsmUp received while in %s state",
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FsmStates[pCpCb->State] );
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break;
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}
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}
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//**
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//
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// Call: FsmOpen
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//
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// Returns: None.
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//
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// Description: This is called after an Open event occurs.
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//
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VOID
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FsmOpen(
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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 ( pCpCb == NULL )
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{
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return;
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}
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PppLog( 2, "FsmOpen event received for protocol %x on port %d",
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CpTable[CpIndex].CpInfo.Protocol, pPcb->hPort );
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switch( pCpCb->State )
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{
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case FSM_INITIAL:
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if ( !FsmThisLayerStarted( pPcb, CpIndex ) )
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return;
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pCpCb->State = FSM_STARTING;
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break;
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case FSM_STARTING:
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case FSM_REQ_SENT:
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case FSM_ACK_RCVD:
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case FSM_ACK_SENT:
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break;
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case FSM_CLOSING:
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pCpCb->State = FSM_STOPPING;
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//
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// Fallthru
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//
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case FSM_OPENED:
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case FSM_STOPPED:
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case FSM_STOPPING:
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//
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// Restart option not implemented.
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//
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// FsmDown( pPcb, CpIndex );
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// FsmUp( pPcb, CpIndex );
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//
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break;
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case FSM_CLOSED:
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InitRestartCounters( pPcb, pCpCb );
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if ( !FsmSendConfigReq( pPcb, CpIndex, FALSE ) )
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return;
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pCpCb->State = FSM_REQ_SENT;
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break;
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default:
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PPP_ASSERT( pCpCb->State < 10 );
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PppLog( 2, "Illegal transition->FsmOpen received while in %s state",
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FsmStates[pCpCb->State] );
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break;
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}
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}
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//**
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//
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// Call: FsmDown
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//
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// Returns: None.
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//
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// Description: Will get called after the physical line goes down.
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//
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VOID
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FsmDown(
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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 ( pCpCb == NULL )
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{
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return;
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}
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PppLog( 2, "FsmDown event received for protocol %x on port %d",
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CpTable[CpIndex].CpInfo.Protocol, pPcb->hPort );
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RemoveFromTimerQ( 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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switch( pCpCb->State )
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{
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case FSM_CLOSED:
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case FSM_CLOSING:
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if ( !FsmReset( pPcb, CpIndex ) )
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return;
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pCpCb->State = FSM_INITIAL;
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break;
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case FSM_OPENED:
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if ( !FsmThisLayerDown( pPcb, CpIndex ) )
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return;
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//
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// Fallthru
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//
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case FSM_REQ_SENT:
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case FSM_ACK_RCVD:
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case FSM_ACK_SENT:
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case FSM_STOPPING:
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if ( !FsmReset( pPcb, CpIndex ) )
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return;
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pCpCb->State = FSM_STARTING;
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break;
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case FSM_STOPPED:
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if ( !FsmThisLayerStarted( pPcb, CpIndex ) )
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return;
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if ( !FsmReset( pPcb, CpIndex ) )
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return;
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pCpCb->State = FSM_STARTING;
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break;
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case FSM_STARTING:
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case FSM_INITIAL:
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default:
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PPP_ASSERT( pCpCb->State < 10 );
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PppLog( 2, "Illegal transition->FsmDown received while in %s state",
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FsmStates[pCpCb->State] );
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break;
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}
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if ( CpIndex == LCP_INDEX )
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{
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pPcb->PppPhase = PPP_LCP;
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}
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}
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//**
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//
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// Call: FsmClose
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//
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// Returns: None.
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//
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// Description: Will get called when a close connection is requested.
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// NOTE: Call FsmThisLayerFinished in the states where we do
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// not have to send a Term Req. and wait for a Term Ack.
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// This is done so that it is guaranteed that
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// FsmThisLayerFinished is called in ALL states. We need
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// to do this since all processing of failures is done in
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// the FsmThisLayerFinished call.
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//
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VOID
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FsmClose(
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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 ( pCpCb == NULL )
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{
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return;
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}
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PppLog( 2, "FsmClose event received for protocol %x on port %d",
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CpTable[CpIndex].CpInfo.Protocol, pPcb->hPort );
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if ( CpIndex == LCP_INDEX )
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{
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pPcb->PppPhase = PPP_LCP;
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}
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//
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// We are closing this layer so remove any items from the timer Q
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//
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RemoveFromTimerQ( 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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switch ( pCpCb->State )
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{
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case FSM_STARTING:
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pCpCb->State = FSM_INITIAL;
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if ( !FsmThisLayerFinished( pPcb, CpIndex, FALSE ) )
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return;
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break;
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case FSM_STOPPED:
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pCpCb->State = FSM_CLOSED;
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if ( !FsmThisLayerFinished( pPcb, CpIndex, FALSE ) )
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return;
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break;
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|
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case FSM_STOPPING:
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pCpCb->State = FSM_CLOSING;
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|
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if ( !FsmThisLayerFinished( pPcb, CpIndex, FALSE ) )
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return;
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break;
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|
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case FSM_REQ_SENT:
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case FSM_OPENED:
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|
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if ( !FsmThisLayerDown( pPcb, CpIndex ) )
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return;
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|
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//
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// Fallthru
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//
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case FSM_ACK_RCVD:
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case FSM_ACK_SENT:
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InitRestartCounters( pPcb, pCpCb );
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|
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//
|
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// May not be able to do this because the link may be down.
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//
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FsmSendTermReq( pPcb, CpIndex );
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pCpCb->State = FSM_CLOSING;
|
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|
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break;
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|
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case FSM_CLOSING:
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case FSM_CLOSED:
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case FSM_INITIAL:
|
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|
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if ( !FsmThisLayerFinished( pPcb, CpIndex, FALSE ) )
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return;
|
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|
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//
|
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// nothing to do
|
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//
|
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break;
|
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|
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default:
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PPP_ASSERT( pCpCb->State < 10 );
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PppLog( 2,"Illegal transition->FsmClose received while in %s state",
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FsmStates[pCpCb->State] );
|
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break;
|
|
|
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}
|
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}
|
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|
|
//**
|
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//
|
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// Call: FsmTimeout
|
|
//
|
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// Returns: None
|
|
//
|
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// Description: Called to process a timeout while waiting for reply
|
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// from remote host.
|
|
//
|
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VOID
|
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FsmTimeout(
|
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IN PCB * pPcb,
|
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IN DWORD CpIndex,
|
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IN DWORD Id,
|
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IN BOOL fAuthenticator
|
|
)
|
|
{
|
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CPCB * pCpCb = GetPointerToCPCB( pPcb, CpIndex );
|
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LCPCB * pLcpCb = (LCPCB*)(pPcb->LcpCb.pWorkBuf);
|
|
|
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if ( pCpCb == NULL )
|
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{
|
|
//
|
|
// If we got a timeout for an authentication CB that is no longer
|
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// active, we just ignore it.
|
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//
|
|
|
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return;
|
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}
|
|
|
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PppLog( 2,
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"Recv timeout event received for portid=%d,Id=%d,Protocol=%x,fAuth=%d",
|
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pPcb->dwPortId, Id, CpTable[CpIndex].CpInfo.Protocol, fAuthenticator );
|
|
|
|
//
|
|
// If we are authenticating we use the ConfigRetryCount
|
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//
|
|
|
|
if ( CpIndex == GetCpIndexFromProtocol( fAuthenticator
|
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? pLcpCb->Local.Work.AP
|
|
: pLcpCb->Remote.Work.AP ) )
|
|
{
|
|
if ( pPcb->PppPhase == PPP_AP )
|
|
{
|
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pCpCb = ( fAuthenticator )
|
|
? &(pPcb->AuthenticatorCb)
|
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: &(pPcb->AuthenticateeCb);
|
|
|
|
//
|
|
// Silently discard timeouts for packets with Id < pPcb->LastId
|
|
//
|
|
|
|
if ( Id < pCpCb->LastId )
|
|
{
|
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return;
|
|
}
|
|
|
|
if ( pCpCb->ConfigRetryCount > 0 )
|
|
{
|
|
(pCpCb->ConfigRetryCount)--;
|
|
|
|
ApWork( pPcb, CpIndex, NULL, NULL, fAuthenticator );
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// If an error has already been set, do not change it.
|
|
//
|
|
|
|
if ( pPcb->LcpCb.dwError == NO_ERROR )
|
|
{
|
|
pPcb->LcpCb.dwError = ERROR_PPP_TIMEOUT;
|
|
}
|
|
|
|
NotifyCallerOfFailure( pPcb, pPcb->LcpCb.dwError );
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
else if ( CpIndex == GetCpIndexFromProtocol( PPP_CBCP_PROTOCOL ) )
|
|
{
|
|
if ( pPcb->PppPhase == PPP_NEGOTIATING_CALLBACK )
|
|
{
|
|
//
|
|
// Silently discard timeouts for packets with Id < pPcb->LastId
|
|
//
|
|
|
|
if ( Id < pCpCb->LastId )
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ( pCpCb->ConfigRetryCount > 0 )
|
|
{
|
|
(pCpCb->ConfigRetryCount)--;
|
|
|
|
CbWork( pPcb, CpIndex, NULL, NULL );
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// If an error has already been set, do not change it.
|
|
//
|
|
|
|
if ( pPcb->LcpCb.dwError == NO_ERROR )
|
|
{
|
|
pPcb->LcpCb.dwError = ERROR_PPP_TIMEOUT;
|
|
}
|
|
|
|
NotifyCallerOfFailure( pPcb, pPcb->LcpCb.dwError );
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Silently discard timeouts for packets with Id < pPcb->LastId
|
|
//
|
|
|
|
if ( Id < pCpCb->LastId )
|
|
{
|
|
return;
|
|
}
|
|
|
|
switch( pCpCb->State )
|
|
{
|
|
|
|
case FSM_REQ_SENT:
|
|
case FSM_ACK_RCVD:
|
|
case FSM_ACK_SENT:
|
|
|
|
if ( pCpCb->ConfigRetryCount > 0 )
|
|
{
|
|
(pCpCb->ConfigRetryCount)--;
|
|
|
|
//
|
|
// If we have not received any PPP frames from the server yet.
|
|
//
|
|
|
|
if ( ( CpIndex == LCP_INDEX ) &&
|
|
( pPcb->LcpCb.dwError == ERROR_PPP_NO_RESPONSE ) &&
|
|
( !(pPcb->fFlags & PCBFLAG_IS_SERVER) ) )
|
|
{
|
|
NotifyCaller( pPcb, PPPMSG_Progress, NULL );
|
|
}
|
|
|
|
// If the RestartTimer value is less then the configured
|
|
// restart timer value, then bump it up by one second.
|
|
//
|
|
|
|
if ( pPcb->RestartTimer < PppConfigInfo.DefRestartTimer )
|
|
{
|
|
(pPcb->RestartTimer)++;
|
|
}
|
|
|
|
if ( !FsmSendConfigReq( pPcb, CpIndex, TRUE ) )
|
|
return;
|
|
|
|
if ( pCpCb->State != FSM_ACK_SENT )
|
|
pCpCb->State = FSM_REQ_SENT;
|
|
}
|
|
else
|
|
{
|
|
PppLog( 1, "Request retry exceeded" );
|
|
|
|
//
|
|
// If the LCP layer exceeded its retry count
|
|
//
|
|
|
|
if ( pCpCb->dwError == NO_ERROR )
|
|
{
|
|
pCpCb->dwError = ERROR_PPP_TIMEOUT;
|
|
}
|
|
|
|
if ( !FsmThisLayerFinished( pPcb, CpIndex, TRUE ) )
|
|
return;
|
|
|
|
pCpCb->State = FSM_STOPPED;
|
|
}
|
|
|
|
break;
|
|
|
|
case FSM_CLOSING:
|
|
case FSM_STOPPING:
|
|
|
|
if ( pCpCb->TermRetryCount > 0 )
|
|
{
|
|
(pCpCb->TermRetryCount)--;
|
|
|
|
FsmSendTermReq( pPcb, CpIndex );
|
|
}
|
|
else
|
|
{
|
|
PppLog( 1, "Terminate retry exceeded" );
|
|
|
|
if ( pCpCb->dwError == NO_ERROR )
|
|
{
|
|
pCpCb->dwError = ERROR_PPP_TIMEOUT;
|
|
}
|
|
|
|
if ( !FsmThisLayerFinished( pPcb, CpIndex, TRUE ) )
|
|
return;
|
|
|
|
pCpCb->State = ( pCpCb->State == FSM_CLOSING ) ? FSM_CLOSED
|
|
: FSM_STOPPED;
|
|
}
|
|
|
|
break;
|
|
|
|
case FSM_OPENED:
|
|
case FSM_INITIAL:
|
|
case FSM_STARTING:
|
|
case FSM_CLOSED:
|
|
case FSM_STOPPED:
|
|
default:
|
|
|
|
PPP_ASSERT( pCpCb->State < 10 );
|
|
|
|
PppLog( 2, "Illegal transition->FsmTimeout rcvd while in %s state",
|
|
FsmStates[pCpCb->State] );
|
|
break;
|
|
}
|
|
}
|
|
|
|
//**
|
|
//
|
|
// Call: FsmReceive
|
|
//
|
|
// Returns: None
|
|
//
|
|
// Description: Called when a PPP packet is received. Will process the
|
|
// incomming packet.
|
|
//
|
|
VOID
|
|
FsmReceive(
|
|
IN PCB * pPcb,
|
|
IN PPP_PACKET * pPacket,
|
|
IN DWORD dwPacketLength
|
|
)
|
|
{
|
|
DWORD dwProtocol;
|
|
DWORD CpIndex;
|
|
PPP_CONFIG * pRecvConfig;
|
|
CPCB * pCpCb;
|
|
DWORD dwLength;
|
|
LCPCB * pLcpCb = (LCPCB*)(pPcb->LcpCb.pWorkBuf);
|
|
|
|
LogPPPPacket( TRUE, pPcb, pPacket, dwPacketLength );
|
|
|
|
//
|
|
// Validate length of packet
|
|
//
|
|
|
|
if ( dwPacketLength < ( PPP_PACKET_HDR_LEN + PPP_CONFIG_HDR_LEN ) )
|
|
{
|
|
PppLog( 1, "Silently discarding badly formed packet" );
|
|
|
|
return;
|
|
}
|
|
|
|
dwProtocol = WireToHostFormat16( pPacket->Protocol );
|
|
|
|
CpIndex = GetCpIndexFromProtocol( dwProtocol );
|
|
|
|
switch( pPcb->PppPhase )
|
|
{
|
|
case PPP_NEGOTIATING_CALLBACK:
|
|
|
|
//
|
|
// Silently discard any packet other than LCP and Authentication
|
|
// and callback packets if we are in the callback phase
|
|
//
|
|
|
|
if ( CpIndex == GetCpIndexFromProtocol( PPP_CBCP_PROTOCOL ) )
|
|
break;
|
|
|
|
//
|
|
// Fallthru
|
|
//
|
|
|
|
case PPP_AP:
|
|
|
|
//
|
|
// Silently discard any packet other than LCP and Authentication
|
|
// packets if we are in the authentication phase
|
|
//
|
|
|
|
if ( CpIndex == GetCpIndexFromProtocol( pLcpCb->Local.Work.AP ) )
|
|
break;
|
|
|
|
if ( CpIndex == GetCpIndexFromProtocol( pLcpCb->Remote.Work.AP ) )
|
|
break;
|
|
|
|
//
|
|
// If we are the authenticatee being authenticated by EAP, then if we
|
|
// receive an NCP packet we should assume success. We do this by
|
|
// generating a fake EAP_SUCCESS message and send it to the
|
|
// authenticatee.
|
|
//
|
|
|
|
if ( ( pLcpCb->Remote.Work.AP == PPP_EAP_PROTOCOL )
|
|
&& ( pPcb->PppPhase == PPP_AP ) )
|
|
{
|
|
PPPAP_INPUT ApInput;
|
|
|
|
switch( dwProtocol )
|
|
{
|
|
case PPP_CBCP_PROTOCOL:
|
|
case PPP_IPCP_PROTOCOL:
|
|
case PPP_ATCP_PROTOCOL:
|
|
case PPP_IPXCP_PROTOCOL:
|
|
case PPP_NBFCP_PROTOCOL:
|
|
case PPP_CCP_PROTOCOL:
|
|
case PPP_BACP_PROTOCOL:
|
|
|
|
PppLog( 1,"Received and NCP or CBCP packet before EAP success");
|
|
|
|
ZeroMemory( &ApInput, sizeof( ApInput ) );
|
|
|
|
ApInput.fSuccessPacketReceived = TRUE;
|
|
|
|
CpIndex = GetCpIndexFromProtocol( PPP_EAP_PROTOCOL );
|
|
|
|
if ( pPcb->AuthenticateeCb.LastId != (DWORD)-1 )
|
|
{
|
|
RemoveFromTimerQ(
|
|
pPcb->dwPortId,
|
|
pPcb->AuthenticateeCb.LastId,
|
|
pLcpCb->Remote.Work.AP,
|
|
FALSE,
|
|
TIMER_EVENT_TIMEOUT );
|
|
}
|
|
|
|
ApWork( pPcb, CpIndex, NULL, &ApInput, FALSE );
|
|
|
|
//
|
|
// PppPhase will now be one of PPP_LCP (if ApWork failed),
|
|
// PPP_NCP, or PPP_NEGOTIATING_CALLBACK. We will not call
|
|
// this function recursively again.
|
|
//
|
|
|
|
//
|
|
// Now process the NCP we received if we have passed
|
|
// authentication
|
|
//
|
|
|
|
if ( ( pPcb->PppPhase == PPP_NCP ) ||
|
|
( pPcb->PppPhase == PPP_NEGOTIATING_CALLBACK ) )
|
|
{
|
|
FsmReceive( pPcb, pPacket, dwPacketLength );
|
|
}
|
|
|
|
return;
|
|
|
|
default:
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Fallthru
|
|
//
|
|
|
|
case PPP_LCP:
|
|
|
|
//
|
|
// Silently discard any packet other than LCP if we are in the
|
|
// LCP or termination or authentication phases
|
|
//
|
|
|
|
if ( CpIndex != LCP_INDEX )
|
|
{
|
|
PppLog( 1, "Non-LCP packet received when LCP is not opened");
|
|
PppLog( 1, "Packet being silently discarded" );
|
|
|
|
return;
|
|
}
|
|
|
|
break;
|
|
|
|
case PPP_NCP:
|
|
|
|
//
|
|
// We do not recognize this protocol
|
|
//
|
|
|
|
if ( CpIndex == (DWORD)-1 )
|
|
{
|
|
if ( dwProtocol == PPP_BAP_PROTOCOL )
|
|
{
|
|
CpIndex = GetCpIndexFromProtocol( PPP_BACP_PROTOCOL );
|
|
|
|
if (CpIndex != (DWORD)-1)
|
|
{
|
|
pCpCb = GetPointerToCPCB( pPcb, CpIndex );
|
|
|
|
if ( pCpCb->State == FSM_OPENED )
|
|
{
|
|
BapEventReceive( pPcb->pBcb, pPacket, dwPacketLength );
|
|
return;
|
|
}
|
|
}
|
|
|
|
BapTrace( "BAP packet silently discarded" );
|
|
return;
|
|
}
|
|
|
|
//
|
|
// If this is a Control Protocol then we reject it, otherwise we
|
|
// we silently discard it.
|
|
// We used to also check if the protocol is less than 0x0000BFFF,
|
|
// but Shiva has proprietary NBFCP with id 0x0000CFEC and we need
|
|
// to protocol reject it.
|
|
//
|
|
|
|
if ( dwProtocol >= 0x00008000 )
|
|
{
|
|
FsmSendProtocolRej( pPcb, pPacket, dwPacketLength );
|
|
}
|
|
else
|
|
{
|
|
PppLog( 1, "Network-layer packet rcvd.");
|
|
PppLog( 1, "Packet being silently discarded" );
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
PppLog( 1, "Packet received being silently discarded" );
|
|
return;
|
|
}
|
|
|
|
pCpCb = GetPointerToCPCB( pPcb, CpIndex );
|
|
|
|
pRecvConfig = (PPP_CONFIG*)(pPacket->Information);
|
|
|
|
//
|
|
// We received a PPP packet so the remote host does support it
|
|
//
|
|
|
|
if ( pPcb->LcpCb.dwError == ERROR_PPP_NO_RESPONSE )
|
|
{
|
|
pPcb->LcpCb.dwError = NO_ERROR;
|
|
}
|
|
|
|
//
|
|
// If we received a packet for a protocol that we have but do not
|
|
// wish to configure then we send a configure reject.
|
|
//
|
|
|
|
if ( ( pCpCb == NULL ) || !(pCpCb->fConfigurable) )
|
|
{
|
|
FsmSendProtocolRej( pPcb, pPacket, dwPacketLength );
|
|
|
|
return;
|
|
}
|
|
|
|
dwLength = WireToHostFormat16( pRecvConfig->Length );
|
|
|
|
if ( ( dwLength > ( dwPacketLength - PPP_PACKET_HDR_LEN ) ) ||
|
|
( dwLength < PPP_CONFIG_HDR_LEN ) )
|
|
{
|
|
PppLog( 1,"Silently discarding badly formed packet" );
|
|
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Not in ProcessPacket table since parameters to this are different.
|
|
//
|
|
|
|
if ( ( CpIndex == LCP_INDEX ) && ( pRecvConfig->Code == PROT_REJ ) )
|
|
{
|
|
ReceiveProtocolRej( pPcb, pPacket );
|
|
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Make sure that the protocol can handle the config code sent.
|
|
//
|
|
|
|
if ( ( pRecvConfig->Code == 0 ) ||
|
|
!( pRecvConfig->Code < CpTable[CpIndex].CpInfo.Recognize ) )
|
|
{
|
|
ReceiveUnknownCode( pPcb, CpIndex, pCpCb, pRecvConfig );
|
|
|
|
return;
|
|
}
|
|
|
|
//
|
|
// If we received an authentication packet.
|
|
//
|
|
|
|
if ( CpIndex == GetCpIndexFromProtocol( pLcpCb->Local.Work.AP ) )
|
|
{
|
|
if ( ApIsAuthenticatorPacket( CpIndex, pRecvConfig->Code ) )
|
|
{
|
|
if ( pPcb->AuthenticatorCb.LastId != (DWORD)-1 )
|
|
{
|
|
//
|
|
// If we have just received a packet we have been waiting for
|
|
// then we stop the outstanding timout for it. We let the
|
|
// APs do the Id matching.
|
|
//
|
|
|
|
if ( pRecvConfig->Id == pPcb->AuthenticatorCb.LastId )
|
|
{
|
|
RemoveFromTimerQ(
|
|
pPcb->dwPortId,
|
|
pPcb->AuthenticatorCb.LastId,
|
|
pLcpCb->Local.Work.AP,
|
|
TRUE,
|
|
TIMER_EVENT_TIMEOUT );
|
|
}
|
|
}
|
|
|
|
ApWork( pPcb, CpIndex, pRecvConfig, NULL, TRUE );
|
|
|
|
return;
|
|
}
|
|
else if ( CpIndex != GetCpIndexFromProtocol( pLcpCb->Remote.Work.AP ) )
|
|
{
|
|
//
|
|
// Silently drop invalid packet, ie. Authenticatee's packet sent
|
|
// using Authenticater's protocol
|
|
//
|
|
|
|
PppLog( 1,
|
|
"Authentication packet received being silently discarded");
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
if ( CpIndex == GetCpIndexFromProtocol( pLcpCb->Remote.Work.AP ) )
|
|
{
|
|
if ( !ApIsAuthenticatorPacket( CpIndex, pRecvConfig->Code ) )
|
|
{
|
|
if ( pPcb->AuthenticateeCb.LastId != (DWORD)-1 )
|
|
{
|
|
//
|
|
// If we have just received a packet we have been waiting for
|
|
// then we stop the outstanding timout for it. We let the
|
|
// APs do the Id matching.
|
|
//
|
|
|
|
if ( pRecvConfig->Id == pPcb->AuthenticateeCb.LastId )
|
|
{
|
|
RemoveFromTimerQ(
|
|
pPcb->dwPortId,
|
|
pPcb->AuthenticateeCb.LastId,
|
|
pLcpCb->Remote.Work.AP,
|
|
FALSE,
|
|
TIMER_EVENT_TIMEOUT );
|
|
}
|
|
}
|
|
|
|
ApWork( pPcb, CpIndex, pRecvConfig, NULL, FALSE );
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Silently drop invalid packet, ie. Authenticator's packet sent
|
|
// using Authenticatee's protocol
|
|
//
|
|
|
|
PppLog( 1,
|
|
"Authentication packet received being silently discarded");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if ( CpIndex == GetCpIndexFromProtocol( PPP_CBCP_PROTOCOL ) )
|
|
{
|
|
if ( pCpCb->LastId != (DWORD)-1 )
|
|
{
|
|
//
|
|
// If we have just received a packet we have been waiting for
|
|
// then we stop the outstanding timout for it. We let the
|
|
// CBCP do the Id matching.
|
|
//
|
|
|
|
if ( pRecvConfig->Id == pCpCb->LastId )
|
|
{
|
|
RemoveFromTimerQ(
|
|
pPcb->dwPortId,
|
|
pCpCb->LastId,
|
|
PPP_CBCP_PROTOCOL,
|
|
FALSE,
|
|
TIMER_EVENT_TIMEOUT );
|
|
}
|
|
}
|
|
|
|
CbWork( pPcb, CpIndex, pRecvConfig, NULL );
|
|
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Any combination of packets allowed here.
|
|
//
|
|
//if this is any packet and not Echo request packet,
|
|
//and if the flag is set then reset the flag.
|
|
if ( pRecvConfig->Code != ECHO_REPLY )
|
|
{
|
|
if ( pPcb->fEchoRequestSend ) pPcb->fEchoRequestSend = 0;
|
|
}
|
|
(*ProcessPacket[pRecvConfig->Code])(pPcb, CpIndex, pCpCb, pRecvConfig);
|
|
}
|
|
}
|