cn-lab4-server

// cn-lab4-server.cpp: определяет точку входа для консольного приложения.
//

#include "stdafx.h"
#include <iostream>
#include <thread>
#include <string>
#include <vector>
#include <set>
#include <windows.h>

#pragma comment(lib, "ws2_32.lib")

using namespace std;

vector<thread> client_list;
set<SOCKET> open_socks;

int client_process(const SOCKET client_sock, const int client_id) {
    SECURITY_DESCRIPTOR sd;
    InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION);
    SetSecurityDescriptorDacl(&sd, true, 0, false);
    SECURITY_ATTRIBUTES sa;
    sa.lpSecurityDescriptor = &sd;
    sa.nLength = sizeof(sa);
    sa.bInheritHandle = true;
    HANDLE newstdin, newstdout, read_stdout, write_stdin;
    CreatePipe(&newstdin, &write_stdin, &sa, 0);
    CreatePipe(&read_stdout, &newstdout, &sa, 0);
    STARTUPINFO si;
    GetStartupInfo(&si);
    si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
    si.wShowWindow = SW_HIDE;
    si.hStdOutput = newstdout;
    si.hStdError = newstdout;
    si.hStdInput = newstdin;
    PROCESS_INFORMATION pi;
    auto cp = CreateProcess(L"C:\\Study\\CN\\cn-lab4-server-rp\\Debug\\cn-lab4-server-rp.exe", 0, 0, 0, true, CREATE_NEW_CONSOLE, 0, 0, &si, &pi);
    if (cp == 0)
        cout << GetLastError() << endl;
    for (int request_id = 1;; request_id++) {
        char recv_buff[8192];
        auto len = recv(client_sock, &recv_buff[0], sizeof(recv_buff) - 1, 0);
        if (len == -1) {
            cout << "Client " << client_id << " was closed" << endl;
            WriteFile(write_stdin, "&close", sizeof("&close"), 0, 0);
            break;
        }
        recv_buff[len] = '\0';
        //len++;
        if (recv_buff == "&close") {
            WriteFile(write_stdin, "&close", sizeof("&close"), 0, 0);
            break;
        }
        cout << "Received request " << request_id << " from client #" << client_id << endl;
        WriteFile(write_stdin, recv_buff, len, 0, 0);
        string ans;
        ReadFile(read_stdout, &ans, len, 0, 0);
        send(client_sock, ans.c_str(), ans.length(), 0);
        cout << "Sent answer for request " << request_id << " to client #" << client_id << endl;
    }
    CloseHandle(read_stdout);
    CloseHandle(write_stdin);
    CloseHandle(pi.hProcess);
    closesocket(client_sock);
    open_socks.erase(client_sock);
    cout << "Client " << client_id << " disconnected" << endl;
    return 0;
}

int port_listen(const SOCKET &main_sock) {
    for (int client_id = 1;; client_id++) {
        sockaddr_in addr_client;
        int client_addr_size = sizeof(addr_client);
        SOCKET client_sock = accept(main_sock, (sockaddr *)&addr_client, &client_addr_size);
        if (client_sock == INVALID_SOCKET) {
            auto wsa_error = WSAGetLastError();
            if (wsa_error != 10004)
                cout << "Accept error " << wsa_error << endl;
            return 1;
        }
        cout << "Client " << client_id << " connected" << endl;
        client_list.emplace_back(client_process, client_sock, client_id);
        open_socks.insert(client_sock);
    }
    return 0;
}

int main()
{
    cout << "cn-lab4 var10 server start" << endl;
    WSAData wsadata;
    WSAStartup(0x0202, &wsadata);
    cout << "Windows Sockets API initialized" << endl;
    SOCKET main_sock;
    main_sock = socket(AF_INET, SOCK_STREAM, 0);
    if (main_sock == INVALID_SOCKET) {
        cout << "Main socket create error " << WSAGetLastError() << endl;
        WSACleanup();
        return 1;
    }
    cout << "Main socket created successfully" << endl;
    sockaddr_in addr_local;
    addr_local.sin_family = AF_INET;
    addr_local.sin_addr.S_un.S_addr = 0;
    addr_local.sin_port = htons(5004);
    if (::bind(main_sock, (sockaddr *)&addr_local, sizeof(addr_local))) {
        cout << "Bind error " << WSAGetLastError() << endl;
        closesocket(main_sock);
        WSACleanup();
        return 2;
    }
    cout << "Port " << ntohs(addr_local.sin_port) << " bound successful" << endl;
    if (listen(main_sock, 16))
    {
        cout << "Listen error " << WSAGetLastError() << endl;
        closesocket(main_sock);
        WSACleanup();
        return  3;
    }
    cout << "Listening port 5004" << endl;
    thread listen(port_listen, main_sock);
    string s;
    do {
        cin >> s;
    } while (s != "stop" && s != "exit");
    closesocket(main_sock);
    if (listen.joinable())
        listen.join();
    for (auto sock : open_socks) {
        send(sock, "&stop", sizeof("&stop"), 0);
        closesocket(sock);
    }
    for (unsigned int i = 0; i < client_list.size(); i++)
        if (client_list.at(i).joinable())
            client_list.at(i).join();
    WSACleanup();
    cout << "cn-lab4 var10 server stopped" << endl;
    return 0;
}