snmp test

// snmp_test.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <stdlib.h>
//#include <windows.h>
#include <winsock2.h>
#pragma comment(lib, "Ws2_32.lib")

#define  MAXLENT 1000
TCHAR* g_strfilePath;  
TCHAR* g_strIpAddress;  
int g_nTimes = 0;  
int g_nInterval = 0;

void usage()  
{  
	printf("usage: [-f:str] [-i:IP address] [-l:number] [-t:number]\n\n");
	printf("     -f   The file you want to send\n");
	printf("     -x   Witch ip you want to send to\n");
	printf("     -l   The time between two transmission\n");
	printf("     -t   how much times you want to transmit file\n");
	ExitProcess(1);
}  

void ValidateArgs(int argc,TCHAR ** argv)
{
	int i;

	if (argc < 5) {
		usage();
	}
	for (i=1;i<argc;i++)
	{
		if((argv[i][0]=='-')||(argv[i][2]== NULL))
		{
			switch(tolower(argv[i++][1]))
			{
			case 'f':
				if (argv[i]) {
					g_strfilePath = argv[i];
				} else {
					usage();
				}
				break;
			case 'i':
				if (argv[i]) {
					g_strIpAddress = argv[i];
				} else {
					usage();
				}
				break;
			case 'l':
				if (argv[i]) {
					g_nInterval  = _ttoi(argv[i]);
				} else {
					usage();
				}
				break;
			case 't':
				if (argv[i]) {
					g_nTimes = _ttoi(argv[i]);
				} else {
					usage();
				}
				break;
			default:
				usage();
				break;
			}
		} else {
			usage();
			break;
		}
	}
}

int _tmain(int argc, _TCHAR* argv[])  
{  


	SOCKET sock = 0;  
	WORD wVersionRequested = 0;  
	WSADATA wsaData;  
	int nErr = 0;  
	sockaddr_in addrto;   
	HANDLE hFile = NULL;  
	LPOFSTRUCT lpOpstruct = NULL;  	
	DWORD dwMaxLen;  
	DWORD dwLen;    
	char *buf = new char[1000];
	char *ipbuf;
 
	ValidateArgs(argc, argv);
	if (0 == g_nInterval ) {
		g_nInterval = 1000;
	}
	if (0 == g_nTimes) {
		g_nTimes = 1;
	}
	dwMaxLen = MAXLENT;

	hFile = CreateFile(g_strfilePath, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,0);

	if(!hFile) {  
		wprintf(L"file not exist!");  
	}  

	if(!ReadFile(hFile, (LPVOID)buf,dwMaxLen, &dwLen, NULL) || dwLen == 0) {  
		wprintf(L" file read failed!");  
	}

	wVersionRequested = MAKEWORD(2,2);  
	nErr = WSAStartup(wVersionRequested, & wsaData);  
	if (0 != nErr) {  
		wprintf(L"Socket 2.2 init failed!");  
		return nErr;  
	}

	if (LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 2 )  
	{  
		WSACleanup();
		CloseHandle(hFile);
		return 0;  
	}  

	sock = socket(  
		AF_INET,           //UDP,TCP, etc   
		SOCK_DGRAM,        //UDP type   
		IPPROTO_UDP        //protocol   
		);  

	if (INVALID_SOCKET == sock ) {  
		wprintf(L"Socket create failed!");
		WSACleanup();
		return 0;  
	}             

	int cCharacters = int(wcslen(g_strIpAddress)+1);
	int cbAnsi = cCharacters*2;
	ipbuf = new char[cbAnsi];

	memset(&addrto,0,sizeof(addrto));  
	WideCharToMultiByte(CP_ACP,0, g_strIpAddress,cCharacters,ipbuf,cbAnsi, NULL, NULL);
	addrto.sin_family = AF_INET;  
	addrto.sin_port = htons(162);
	addrto.sin_addr.s_addr = inet_addr(ipbuf);

	while (g_nTimes--) {
		Sleep(g_nInterval);
		if (sendto(sock, buf, dwLen, 0, (sockaddr*)&addrto, sizeof(addrto)) == SOCKET_ERROR) {
			nErr = WSAGetLastError();
			wprintf(L"WSAGetLastError = %d ", nErr);
			break;
		}
	}

	closesocket(sock);
	WSACleanup();
	CloseHandle(hFile);
	return 0;  
}