116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*++
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Copyright (c) 2000, Microsoft Corporation
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Module Name:
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sendarp.c
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Abstract:
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The module implements a utility program to resolve an IP address to
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a hardware address using the SendARP() API routine.
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Author:
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Abolade Gbadegesin (aboladeg) 6-October-1999
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Revision History:
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--*/
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#include <windows.h>
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#include <winsock.h>
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#include <iphlpapi.h>
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#include <stdio.h>
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#include <stdlib.h>
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MIB_IPNETROW IpNetRow;
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int __cdecl
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main(
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int argc,
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char* argv[]
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)
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{
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ULONG Error;
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UCHAR HardwareAddress[6];
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ULONG HardwareAddressLength;
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ULONG InterfaceIndex;
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ULONG Length;
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SOCKADDR_IN SockAddrIn;
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SOCKET Socket;
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ULONG SourceAddress;
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ULONG TargetAddress;
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HANDLE ThreadHandle;
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WSADATA wd;
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if (argc != 2) {
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printf("Usage: %s <IP address>\n", argv[0]);
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return 0;
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}
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WSAStartup(0x202, &wd);
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TargetAddress = inet_addr(argv[1]);
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//
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// Retrieve the best interface for the target IP address,
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// and also perform a UDP-connect to determine the 'closest'
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// local IP address to the target IP address.
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//
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Error = GetBestInterface(TargetAddress, &InterfaceIndex);
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if (Error != NO_ERROR) {
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printf("GetBestInterfaceFromStack: %d\n", Error);
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return 0;
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}
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Length = sizeof(SockAddrIn);
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SockAddrIn.sin_family = AF_INET;
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SockAddrIn.sin_port = 0;
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SockAddrIn.sin_addr.s_addr = TargetAddress;
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if ((Socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))
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== INVALID_SOCKET ||
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connect(Socket, (PSOCKADDR)&SockAddrIn, sizeof(SockAddrIn))
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== SOCKET_ERROR ||
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getsockname(Socket, (PSOCKADDR)&SockAddrIn, &Length)
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== SOCKET_ERROR) {
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printf("socket/connect/getsockname: %d\n", WSAGetLastError());
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}
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SourceAddress = SockAddrIn.sin_addr.s_addr;
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//
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// Make sure the target IP address isn't already cached,
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// by removing it from the ARP cache if present using the interface index
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// determined above.
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//
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ZeroMemory(&IpNetRow, sizeof(IpNetRow));
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IpNetRow.dwIndex = InterfaceIndex;
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IpNetRow.dwPhysAddrLen = 6;
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IpNetRow.dwAddr = TargetAddress;
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IpNetRow.dwType = MIB_IPNET_TYPE_INVALID;
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DeleteIpNetEntry(&IpNetRow);
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HardwareAddressLength = sizeof(HardwareAddress);
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Error =
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SendARP(
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TargetAddress,
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SourceAddress,
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(PULONG)HardwareAddress,
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&HardwareAddressLength
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);
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if (Error) {
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printf("SendARP: %d\n", Error);
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} else {
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ULONG i;
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printf("%s\t", argv[1]);
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for (i = 0; i < HardwareAddressLength-1; i++) {
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printf("%02x-", HardwareAddress[i]);
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}
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printf("%02x\n", HardwareAddress[i]);
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}
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return 0;
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}
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