#include <iostream>
#include <string>
#include <unordered_map>
#include <ws2tcpip.h>                    //  ┐ getaddrinfo jest
#pragma comment(lib, "Ws2_32.lib")       //  ┘ w innej bibliotece
// poniższy blok kodu, do funkcji main, to pomocnicze struktury i funkcje;
// proszę w trakcie zajęć nie poświęcać czasu na ich analizę!
using namespace std; typedef unordered_map<int, string> map; 
map families{{AF_INET,"AF_INET "},{AF_INET6,"AF_INET6"}};
map socktypes{{0,"0"},{SOCK_RAW,"SOCK_RAW   "},{SOCK_STREAM,"SOCK_STREAM"},{SOCK_DGRAM,"SOCK_DGRAM "}};
map protocols{{0,"0"},{IPPROTO_TCP,"IPPROTO_TCP"},{IPPROTO_UDP,"IPPROTO_UDP"}};
string getIp(sockaddr*a,socklen_t l){char b[40];getnameinfo(a,l,b,40,0,0,NI_NUMERICHOST);return b;}
string getPort(sockaddr*a,socklen_t l){char b[6];getnameinfo(a,l,0,0,b,6,NI_NUMERICSERV);return b;}

int main(int c, char**a) {
    WSADATA wsadata{};                      //  ┐ no i standardowo trzeba
    WSAStartup(MAKEWORD(2, 2),&wsadata);    //  ┘ zainicjalizować winsock

    const char *host = (c<2 ? "ietf.org" : a[1]);
    const char *port = (c<3 ? nullptr    : a[2]);
    
    addrinfo *resolved;
    int res = getaddrinfo(host, port, nullptr, &resolved);

    if (res) {
        cerr << "Getaddrinfo failed: " << gai_strerror(res) << endl;
        return 1;
    }

    for (addrinfo *it = resolved; it;  it = it->ai_next) {
        cout <<   "family: "   << families[ it->ai_family]
             << "  address: "  << getIp(    it->ai_addr, it->ai_addrlen)
             << "  port: "     << getPort(  it->ai_addr, it->ai_addrlen)
             << "  socktype: " << socktypes[it->ai_socktype]
             << "  protocol: " << protocols[it->ai_protocol]
             << endl;
    }

    freeaddrinfo(resolved);

    return 0;
}