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83 lines
2.3 KiB
83 lines
2.3 KiB
/* ep.c, /appletalk/source, Garth Conboy, 10/31/88 */
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/* Copyright (c) 1988 by Pacer Software Inc., La Jolla, CA */
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/* GC - Initial coding.
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GC - (08/18/90): New error logging mechanism.
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GC - (03/30/92): Updated for BufferDescriptors.
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*** Make the PVCS source control system happy:
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$Header$
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$Log$
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***
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EP handling.
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*/
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#define IncludeEpErrors 1
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#include "atalk.h"
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long far EpPacketIn(AppleTalkErrorCode errorCode,
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long unsigned userData,
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int port,
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AppleTalkAddress source,
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long destinationSocket,
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int protocolType,
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char far *datagram,
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int datagramLength,
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AppleTalkAddress actualDestination)
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{
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BufferDescriptor descriptor;
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/* "Use" unneeded actual parameters. */
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userData, actualDestination, port;
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/* Only play if we've been asked nicely! */
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if (errorCode is ATsocketClosed)
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return;
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else if (errorCode isnt ATnoError)
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{
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ErrorLog("EpPacketIn", ISevError, __LINE__, port,
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IErrEpBadIncomingError, IMsgEpBadIncomingError,
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Insert0());
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return((long)True);
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}
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/* Only listen to EP type packets that have some data. */
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if (protocolType isnt DdpProtocolEp or
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datagramLength is 0)
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return((long)True);
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/* Do we have an Echo reqeust? */
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if (datagram[EpCommandOffset] isnt EchoRequest)
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return;
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/* Allocate a buffer descriptor for the reply... make a copy due to the
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possibility of asynchronous transmit completion. */
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if ((descriptor = NewBufferDescriptor(datagramLength)) is Empty)
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{
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ErrorLog("EpPacketIn", ISevError, __LINE__, port,
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IErrEpOutOfMemory, IMsgEpOutOfMemory,
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Insert0());
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return((long)True);
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}
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MoveMem(descriptor->data, datagram, datagramLength);
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/* Okay, turn the packet around. */
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descriptor->data[EpCommandOffset] = EchoReply;
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if (DeliverDdp(destinationSocket, source, protocolType, descriptor,
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datagramLength, Empty, Empty, 0) isnt ATnoError)
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ErrorLog("EpPacketIn", ISevError, __LINE__, port,
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IErrEpBadReplySend, IMsgEpBadReplySend,
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Insert0());
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return((long)True);
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} /* EpPacketIn */
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