实现一个whois工具

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/*********************************************************************************************************
* whois.cpp
* Note: Phoenix whois tools
* Date: @2015.05
* Author: Force Charlie
* E-mail:<forcemz@outlook.com>
* Copyright (C) 2015 The ForceStudio All Rights Reserved.
**********************************************************************************************************/
#ifndef UNICODE
#define UNICODE
#endif

#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <codecvt>
#include <vector>
#pragma comment(lib,"ws2_32")


static wchar_t whoisList[] =L"whois.internic.net";
wchar_t *host = nullptr;
wchar_t other[2048] = { 0 };
int optset = 0;

static bool Whois(const wchar_t *domian);
static void usage()
{
	printf("usage: whois [-h hostname] name ....\n");
}

bool StringToWideString(const std::string& src, std::wstring &wstr)
{
	std::locale sys_locale("");
	const char* data_from = src.c_str();
	const char* data_from_end = src.c_str() + src.size();
	const char* data_from_next = 0;

	wchar_t* data_to = new wchar_t[src.size() + 1];
	wchar_t* data_to_end = data_to + src.size() + 1;
	wchar_t* data_to_next = 0;

	wmemset(data_to, 0, src.size() + 1);

	typedef std::codecvt<wchar_t, char, mbstate_t> convert_facet;
	mbstate_t in_state = { 0 };
	auto result = std::use_facet<convert_facet>(sys_locale).in(
		in_state, data_from, data_from_end, data_from_next,
		data_to, data_to_end, data_to_next);
	if (result == convert_facet::ok)
	{
		wstr = data_to;
		delete[] data_to;
		return true;
	}
	delete[] data_to;
	return false;
}

int main(int argc, char **argv)
{
	if (argc < 2)
	{
		usage();
		return 0;
	}
	host = whoisList;
	std::vector<std::string> domainV;
	for (int i = 1; i < argc; i++){
		switch (argv[i][0]){
		case ‘-‘:
		case ‘/‘:
			if (strlen(argv[i]) < 2)break;
			if (strcmp(&argv[i][1], "h") == 0){
				if (i + 2 < argc)
				{
					std::string str = argv[i + 1];
					std::wstring wstr;
					if (!StringToWideString(str, wstr))
						return 1;
					wcsncpy_s(other, wstr.c_str(), 2048);
					host = other;
					i++;
				}
			}
			break;
		default:
			domainV.push_back(argv[i]);
			break;
		}
	}
	char ch;
	DWORD dwRetval;
	ADDRINFOW *result = NULL;
	ADDRINFOW hints;
	ZeroMemory(&hints, sizeof(hints));
	hints.ai_family = AF_UNSPEC;
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_protocol = IPPROTO_TCP;
	WSADATA wsaData;
	auto iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
	if ((dwRetval = GetAddrInfoW(host, nullptr, &hints, &result)) != 0){
		wprintf(L"whois: GetAddrInfoW failed with error: %d\n", dwRetval);
		WSACleanup();
		return 1;
	}
	if (result == nullptr)
		return 1;
	SOCKET sock;
	sock = socket(result->ai_family, SOCK_STREAM, IPPROTO_TCP);
	if (sock == INVALID_SOCKET) {
		wprintf(L"socket function failed with error: %ld\n", WSAGetLastError());
		FreeAddrInfoW(result);
		WSACleanup();
		return 1;
	}
	wchar_t ipstringbuffer[46];
	DWORD ipbufferlength = 46;
	WSAAddressToString(result->ai_addr, (DWORD)result->ai_addrlen, NULL,
		ipstringbuffer, &ipbufferlength);
	sockaddr_in sin;
	memset(/*(caddr_t)*/&sin, 0, sizeof(sin));
	sin.sin_family = result->ai_family;
	ULONG iaddr;
	InetPtonW(result->ai_family, ipstringbuffer, &iaddr);
	sin.sin_addr.s_addr = iaddr;
	sin.sin_port = htons(43);
	iResult = connect(sock, (sockaddr *)&sin, sizeof(sin));
	if (iResult == SOCKET_ERROR) {
		wprintf(L"connect function failed with error: %ld\n", WSAGetLastError());
		iResult = closesocket(sock);
		if (iResult == SOCKET_ERROR)
			wprintf(L"closesocket function failed with error: %ld\n", WSAGetLastError());
		FreeAddrInfoW(result);
		WSACleanup();
		return 1;
	}
	auto i = domainV.size();
	while (i-- > 1){
		auto dm = domainV[i-1];
		send(sock, dm.c_str(), dm.size(), 0);
		send(sock, " ", 1, 0);
	}
	send(sock, domainV[0].c_str(), domainV[0].size(), 0);
	send(sock, "\r\n", 2, 0);
	wprintf(L"[%s]\n", host);
	while (recv(sock, &ch, 1, 0) == 1)
		putchar(ch);
	FreeAddrInfoW(result);
	WSACleanup();
	return 0;
}

实现一个whois工具

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原文地址：http://my.oschina.net/GIIoOS/blog/416491