WinSock之协议查询

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include "WinSock2.h"
#include "iostream"
#pragma comment(lib,"ws2_32.lib")  //链接WinSock导入库
using namespace std;
int main(int argc, char **argv) {
	WSADATA wsaData;
	WORD wVersionRequested = MAKEWORD(2, 2);   //调用2.2版本
	if (WSAStartup(wVersionRequested, &wsaData) != 0) {   //加载WinSock动态链接库
		cout << "加载WinSock DLL失败！\n";
		return 0;
	}
	struct protoent *pProto;
	for (int i = 1; i <= 256; i++) {
		if ((pProto = getprotobynumber(i)) != NULL) {   //协议查询
			cout << "协议名：" << pProto->p_name << endl;
			cout << "协议号：" << pProto->p_proto << endl;
		}
	}
	
	WSACleanup();
	return 0;
}