批量测试服务器端口是否开放

#include "stdafx.h"
#include <WinSock2.h>
#include <iostream>
#include <string>
#include <map>

using namespace std;

#pragma comment(lib,"ws2_32")

bool isPortOpen(const char* szIp,int nPort)
{
 SOCKET sock = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
 if (sock == INVALID_SOCKET)
  return false;
 
    SOCKADDR_IN addr;
 memset(&addr,0,sizeof(addr));
 addr.sin_family = AF_INET;
 addr.sin_addr.s_addr = inet_addr(szIp);
 addr.sin_port = htons(nPort);

 int nRet = connect(sock,(sockaddr*)&addr,sizeof(addr));

 closesocket(sock);

 return (nRet==0)?true:false;
}

std::string getDirPath()
{
 std::string strPath;
 char szPath[MAX_PATH] = {0};
 memset(szPath,0,MAX_PATH);
 GetModuleFileName(NULL,szPath,MAX_PATH);
 strPath = szPath;
 size_t np1 = strPath.find_last_of('\');
 if (np1 != std::string::npos)
  strPath = strPath.substr(0,np1+1);
 return strPath;
}

#define app_name "app"
#define server_name "server"
#define port_name "port"
#define err_name "err"

std::multimap<std::string,int> g_sp;

void loadConfigIni()
{
 std::string strOptFile = getDirPath() + "opt.ini";
 char szValue[1024] = {0};
 char szServer[1024] = {0};
 char szPort[1024] = {0};
 int nPort = 0;
 int i=0;
 for (;;)
 {
  _snprintf(szServer,1024,"%s%d",server_name,i);
  _snprintf(szPort,1024,"%s%d",port_name,i++);
  GetPrivateProfileString(app_name,szServer,err_name,szValue,1024,strOptFile.c_str());
  if (stricmp(szValue,err_name) == 0)
   break;
  nPort = GetPrivateProfileInt(app_name,szPort,-1,strOptFile.c_str());
  if (nPort == -1)
   break;

  g_sp.insert(std::make_pair(szValue,nPort));
 }
}

int _tmain(int argc, _TCHAR* argv[])
{
 WSADATA wsaData;
 memset(&wsaData,0,sizeof(WSADATA));
 WSAStartup(MAKEWORD(2,2),&wsaData);
 
 loadConfigIni();
 std::multimap<std::string,int>::iterator it = g_sp.begin();
 for (; it != g_sp.end(); it++)
 {
  if (isPortOpen((it->first).c_str(),it->second))
   printf("[%s][%d] open. ",(it->first).c_str(),it->second);
  else
   printf("[%s][%d] close. ",(it->first).c_str(),it->second);
 }

 getchar();
 WSACleanup();
 return 0;
}