129 lines
2.1 KiB
C
129 lines
2.1 KiB
C
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/*++
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Copyright (c) 1999, Microsoft Corporation
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Module Name:
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sample\packet.c
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Abstract:
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The file contains functions to deal with an ip sample packet.
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--*/
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#include "pchsample.h"
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#pragma hdrstop
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DWORD
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PacketCreate (
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OUT PPACKET *ppPacket)
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/*++
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Routine Description
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Creates a packet.
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Locks
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None
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Arguments
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ppPacket pointer to the packet address
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Return Value
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NO_ERROR if success
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Failure code o/w
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--*/
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{
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DWORD dwErr = NO_ERROR;
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// validate parameters
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if (!ppPacket)
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return ERROR_INVALID_PARAMETER;
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do // breakout loop
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{
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// allocate and zero out the packet structure
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MALLOC(ppPacket, sizeof(PACKET), &dwErr);
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if (dwErr != NO_ERROR)
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break;
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// initialize fields
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// ((*ppPacket)->ipSource zero'ed out
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sprintf((*ppPacket)->rgbyBuffer, "hello world!"); // for now :)
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(*ppPacket)->wsaBuffer.buf = (*ppPacket)->rgbyBuffer;
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(*ppPacket)->wsaBuffer.len = strlen((*ppPacket)->rgbyBuffer);
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} while (FALSE);
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return dwErr;
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}
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DWORD
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PacketDestroy (
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IN PPACKET pPacket)
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/*++
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Routine Description
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Destroys a packet.
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Locks
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None
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Arguments
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pPacket packet to destroy
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Return Value
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NO_ERROR always
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--*/
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{
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// validate parameters
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if (!pPacket)
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return NO_ERROR;
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FREE(pPacket);
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return NO_ERROR;
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}
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#ifdef DEBUG
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DWORD
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PacketDisplay (
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IN PPACKET pPacket)
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/*++
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Routine Description
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Displays a packet, it's fields and the buffer.
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Locks
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None
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Arguments
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pPacket packet to destroy
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Return Value
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NO_ERROR always
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--*/
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{
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ULONG i;
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CHAR szBuffer[2 * MAX_PACKET_LENGTH + 1]; // buffer in hex
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for (i = 0; i < pPacket->wsaBuffer.len; i++)
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sprintf(szBuffer + i*2, "%02x", pPacket->rgbyBuffer[i]);
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TRACE3(NETWORK, "Packet... Source %s, Length %d, Buffer %s",
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INET_NTOA(pPacket->ipSource), pPacket->wsaBuffer.len, szBuffer);
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return NO_ERROR;
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}
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#endif // DEBUG
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