Создание сокета по адресу 192.168

#include <iostream>
#include <sstream>
#include <string>
 
#define _WIN32_WINNT 0x501
 
#include <WinSock2.h>
#include <WS2tcpip.h>
 
#pragma comment(lib, "Ws2_32.lib")
 
using namespace std;
 
int main()
{
    WSADATA wsaData;
 
    int result = WSAStartup(MAKEWORD(2, 2), &wsaData);
 
    if (result != 0) 
    {
        cout << "WSAStartup failed: " << result << "\n";
        return result;
    }
 
    struct addrinfo* addr = NULL;
 
    struct addrinfo hints;
    ZeroMemory(&hints, sizeof(hints));
 
    hints.ai_family = AF_INET;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;
    hints.ai_flags = AI_PASSIVE;
 
    result = getaddrinfo("192.168.1.20", "80", &hints, &addr);
 
 
    if (result != 0) 
    {
        cout << "getaddrinfo failed: " << result << "\n";
        WSACleanup();
        return 1;
    }
 
    int listen_socket = socket(addr->ai_family, addr->ai_socktype,
        addr->ai_protocol);
 
    if (listen_socket == INVALID_SOCKET)
    {
        cout << "Error at socket: " << WSAGetLastError() << "\n";
        freeaddrinfo(addr);
        WSACleanup();
        return 1;
    }
 
    result = bind(listen_socket, addr->ai_addr, (int)addr->ai_addrlen);
 
 
    if (result == SOCKET_ERROR) 
    {
        cout << "bind failed with error: " << WSAGetLastError() << "\n";
        freeaddrinfo(addr);
        closesocket(listen_socket);
        WSACleanup();
        return 1;
    }
 
 
    if (listen(listen_socket, SOMAXCONN) == SOCKET_ERROR)
    {
        cout << "listen failed with error: " << WSAGetLastError() << "\n";
        closesocket(listen_socket);
        WSACleanup();
        return 1;
    }
 
 
    const int max_client_buffer_size = 1024;
    char buf[max_client_buffer_size];
    int client_socket = INVALID_SOCKET;
 
    for (;;) 
    {
        client_socket = accept(listen_socket, NULL, NULL);
 
        if (client_socket == INVALID_SOCKET) {
            cerr << "accept failed: " << WSAGetLastError() << "\n";
            closesocket(listen_socket);
            WSACleanup();
            return 1;
        }
 
        result = recv(client_socket, buf, max_client_buffer_size, 0);
 
        stringstream response;
        stringstream response_body;
 
        if (result == SOCKET_ERROR) {
            cout << "recv failed: " << result << "\n";
            closesocket(client_socket);
        }
        else if (result == 0) {
            cerr << "connection closed...\n";
        }
        else if (result > 0) {
            buf[result] = '\0';
 
 
            response_body << "<title>Test C++ HTTP Server by Qadronic</title>\n"
                << "<h1>Test page</h1>\n"
                << "<p>This is body of the test page...</p>\n"
                << "<h2>Request headers</h2>\n"
                << "<pre>" << buf << "</pre>\n"
                << "<em><small>Test C++ Http Server by Qadronic</small></em>\n";
 
 
            response << "HTTP/1.1 200 OK\r\n"
                << "Version: HTTP/1.1\r\n"
                << "Content-Type: text/html; charset=utf-8\r\n"
                << "Content-Length: " << response_body.str().length()
                << "\r\n\r\n"
                << response_body.str();
 
 
            result = send(client_socket, response.str().c_str(),
                response.str().length(), 0);
 
            if (result == SOCKET_ERROR) {
                cerr << "send failed: " << WSAGetLastError() << "\n";
            }
            closesocket(client_socket);
        }
    }
    closesocket(listen_socket);
    freeaddrinfo(addr);
    WSACleanup();
    return 0;
}