124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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ipaddr.c
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Abstract:
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Ip Address validation routines.
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Author:
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Sunita Shrivastava (sunitas) July 19, 1997
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Revision History:
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Who When What
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-------- -------- ----------------------------------------------
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sunitas 07-19-97 created
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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>
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#include <windows.h>
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#include <llinfo.h>
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#include <wchar.h>
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#include <ipexport.h>
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#include <cluster.h>
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#include <icmpapi.h>
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#include <llinfo.h>
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#include <ipinfo.h>
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//
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// Define IP Address ping test data
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//
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#define ICMP_TTL 128
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#define ICMP_TOS 0
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#define ICMP_TIMEOUT 500
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#define ICMP_TRY_COUNT 4
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#define ICMP_BUFFER_SIZE (sizeof(ICMP_ECHO_REPLY) + 8)
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BOOL
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ClRtlIsDuplicateTcpipAddress(
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IN IPAddr IpAddr
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)
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/*++
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Routine Description:
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This routine checks whether a give IP Address already exists on the
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network.
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Arguments:
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IpAddr - The IP Address to check for.
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Return Value:
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TRUE if the specified address exists on the network.
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FALSE otherwise.
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--*/
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{
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DWORD status;
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IP_OPTION_INFORMATION icmpOptionInfo;
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HANDLE icmpHandle;
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DWORD numberOfReplies;
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DWORD i;
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UCHAR icmpBuffer[ICMP_BUFFER_SIZE];
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PICMP_ECHO_REPLY reply;
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icmpHandle = IcmpCreateFile();
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if (icmpHandle != INVALID_HANDLE_VALUE) {
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icmpOptionInfo.OptionsData = NULL;
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icmpOptionInfo.OptionsSize = 0;
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icmpOptionInfo.Ttl = ICMP_TTL;
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icmpOptionInfo.Tos = ICMP_TOS;
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icmpOptionInfo.Flags = 0;
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for (i=0; i<ICMP_TRY_COUNT; i++) {
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numberOfReplies = IcmpSendEcho(
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icmpHandle,
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IpAddr,
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NULL,
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0,
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&icmpOptionInfo,
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icmpBuffer,
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ICMP_BUFFER_SIZE,
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ICMP_TIMEOUT
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);
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reply = (PICMP_ECHO_REPLY) icmpBuffer;
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while (numberOfReplies != 0) {
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if (reply->Status == IP_SUCCESS) {
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IcmpCloseHandle( icmpHandle );
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return(TRUE);
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}
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reply++;
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numberOfReplies--;
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}
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}
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IcmpCloseHandle( icmpHandle );
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}
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return(FALSE);
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} // ClRtlIsDuplicateTcpipAddress
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