144 lines
2.4 KiB
C
144 lines
2.4 KiB
C
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/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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aep.c
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Abstract:
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This module contains the echo protocol support code.
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Author:
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Jameel Hyder (jameelh@microsoft.com)
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Nikhil Kamkolkar (nikhilk@microsoft.com)
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Revision History:
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19 Jun 1992 Initial Version
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Notes: Tab stop: 4
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--*/
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#define FILENUM AEP
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#include <atalk.h>
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#pragma hdrstop
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VOID
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AtalkAepPacketIn(
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IN PPORT_DESCRIPTOR pPortDesc,
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IN PDDP_ADDROBJ pDdpAddr,
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IN PBYTE pPkt,
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IN USHORT PktLen,
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IN PATALK_ADDR pSrcAddr,
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IN PATALK_ADDR pDestAddr,
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IN ATALK_ERROR ErrorCode,
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IN BYTE DdpType,
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IN PVOID pHandlerCtx,
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IN BOOLEAN OptimizedPath,
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IN PVOID OptimizeCtx
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)
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/*++
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Routine Description:
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Arguments:
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Return Value:
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--*/
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{
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PBUFFER_DESC pBufDesc;
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SEND_COMPL_INFO SendInfo;
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ASSERT(KeGetCurrentIrql() == DISPATCH_LEVEL);
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// Turn around and send the packet back to the destination address.
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if (ATALK_SUCCESS(ErrorCode))
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{
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if ((DdpType == DDPPROTO_EP) &&
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(PktLen > 0))
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{
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if (*pPkt == EP_COMMAND_REQUEST)
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{
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// This is an echo request, we have some data that needs
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// to be echoed back! Do it.
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pBufDesc = AtalkAllocBuffDesc(
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NULL,
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PktLen,
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(BD_CHAR_BUFFER | BD_FREE_BUFFER));
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if (pBufDesc)
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{
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// Change command to be Reply
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*pPkt = EP_COMMAND_REPLY;
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// This *does not* set the PktLen in pBufDesc. Set it.
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AtalkCopyBufferToBuffDesc(
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pPkt,
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PktLen,
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pBufDesc,
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0);
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AtalkSetSizeOfBuffDescData(pBufDesc, PktLen);
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// Call AtalkDdpSend.
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SendInfo.sc_TransmitCompletion = atalkAepSendComplete;
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SendInfo.sc_Ctx1 = pBufDesc;
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// SendInfo.sc_Ctx2 = NULL;
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// SendInfo.sc_Ctx3 = NULL;
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if (!ATALK_SUCCESS(AtalkDdpSend(pDdpAddr,
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pSrcAddr,
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(BYTE)DDPPROTO_EP,
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FALSE,
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pBufDesc,
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NULL,
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0,
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NULL,
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&SendInfo)))
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{
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AtalkFreeBuffDesc(pBufDesc);
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}
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}
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}
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}
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}
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else
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{
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DBGPRINT(DBG_COMP_AEP, DBG_LEVEL_ERR,
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("AtalkAepPacketIn: Ignoring incoming packet AepPacketIn %lx\n",
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ErrorCode));
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}
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}
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VOID FASTCALL
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atalkAepSendComplete(
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IN NDIS_STATUS Status,
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IN PSEND_COMPL_INFO pSendInfo
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)
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/*++
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Routine Description:
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Arguments:
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Return Value:
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--*/
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{
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AtalkFreeBuffDesc((PBUFFER_DESC)(pSendInfo->sc_Ctx1));
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}
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