#include <iostream>
#include <winsock2.h>
#include <ws2tcpip.h>
using namespace std;
#pragma comment(lib, "Ws2_32.lib")
int main()
{
WORD wVersionRequested = 0;
WSADATA wsaData = {};
int err = 0;
wVersionRequested = MAKEWORD(2, 2);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0)
{
return -1;
}
if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2)
{
WSACleanup();
return -1;
}
char** pptr = NULL;
char szHostName[256] = {};
cout << "--------------------------------------" << endl;
cout << "输入域名:";
while (cin.getline(szHostName, sizeof(szHostName)))
{
HOSTENT* pHostEntry = gethostbyname(szHostName);
if (NULL != pHostEntry && szHostName[0] != '\0')
{
//将主机的规范名输出
cout << "主机规范名:" << pHostEntry->h_name << endl;
//主机别名,可含多个
int i = 0;
for (i = 1, pptr = pHostEntry->h_aliases; *pptr != NULL; ++pptr)
{
cout << "主机别名" << i++ << ":" << *pptr << endl;
}
//将主机地址列表输出,可含多个
char szIpBuff[32] = { 0 };
for (i = 1, pptr = pHostEntry->h_addr_list; *pptr != NULL; ++pptr)
{
memset(szIpBuff, 0, sizeof(szIpBuff));
//inet_ntop的返回值为NULL,则表示失败,否则返回相应的IP地址(此时szIpRet指向的是szIpBuff)
const char* szIpRet = inet_ntop(pHostEntry->h_addrtype, *pptr, szIpBuff, sizeof(szIpBuff));
if (szIpBuff != NULL)
{
cout << "解析IP地址" << i++ << ":" << szIpRet << endl;
}
}
}
else
{
cout << "解析失败!" << endl;
}
memset(szHostName, 0, sizeof(szHostName));
cout << "--------------------------------------" << endl;
cout << "输入域名:";
}
WSACleanup();
return 0;
}