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Services: Renamed from Servers
It didn't feel right to have a "DHCPClient" in a "Servers" directory. Rename this to Services to better reflect the type of programs we'll be putting in there.
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parent
042b1f6814
commit
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119 changed files with 31 additions and 31 deletions
177
Services/TelnetServer/main.cpp
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177
Services/TelnetServer/main.cpp
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "Client.h"
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#include <AK/BufferStream.h>
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#include <AK/ByteBuffer.h>
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#include <AK/HashMap.h>
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#include <AK/IPv4Address.h>
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#include <AK/String.h>
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#include <AK/StringBuilder.h>
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#include <AK/Types.h>
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#include <LibCore/EventLoop.h>
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#include <LibCore/TCPServer.h>
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#include <LibCore/TCPSocket.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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static void run_command(int ptm_fd, String command)
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{
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pid_t pid = fork();
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if (pid == 0) {
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const char* tty_name = ptsname(ptm_fd);
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if (!tty_name) {
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perror("ptsname");
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exit(1);
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}
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close(ptm_fd);
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int pts_fd = open(tty_name, O_RDWR);
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if (pts_fd < 0) {
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perror("open");
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exit(1);
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}
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// NOTE: It's okay if this fails.
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(void)ioctl(0, TIOCNOTTY);
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close(0);
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close(1);
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close(2);
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int rc = dup2(pts_fd, 0);
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if (rc < 0) {
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perror("dup2");
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exit(1);
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}
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rc = dup2(pts_fd, 1);
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if (rc < 0) {
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perror("dup2");
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exit(1);
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}
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rc = dup2(pts_fd, 2);
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if (rc < 0) {
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perror("dup2");
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exit(1);
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}
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rc = close(pts_fd);
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if (rc < 0) {
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perror("close");
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exit(1);
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}
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rc = ioctl(0, TIOCSCTTY);
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if (rc < 0) {
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perror("ioctl(TIOCSCTTY)");
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exit(1);
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}
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const char* args[4] = { "/bin/Shell", nullptr, nullptr, nullptr };
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if (!command.is_empty()) {
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args[1] = "-c";
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args[2] = command.characters();
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}
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const char* envs[] = { "TERM=xterm", "PATH=/bin:/usr/bin:/usr/local/bin", nullptr };
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rc = execve("/bin/Shell", const_cast<char**>(args), const_cast<char**>(envs));
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if (rc < 0) {
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perror("execve");
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exit(1);
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}
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ASSERT_NOT_REACHED();
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}
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}
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int main(int argc, char** argv)
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{
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Core::EventLoop event_loop;
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auto server = Core::TCPServer::construct();
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int opt;
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u16 port = 23;
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const char* command = "";
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while ((opt = getopt(argc, argv, "p:c:")) != -1) {
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switch (opt) {
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case 'p':
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port = atoi(optarg);
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break;
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case 'c':
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command = optarg;
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break;
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default:
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fprintf(stderr, "Usage: %s [-p port] [-c command]", argv[0]);
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exit(1);
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}
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}
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if (!server->listen({}, port)) {
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perror("listen");
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exit(1);
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}
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HashMap<int, NonnullRefPtr<Client>> clients;
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int next_id = 0;
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server->on_ready_to_accept = [&next_id, &clients, &server, command] {
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int id = next_id++;
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auto client_socket = server->accept();
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if (!client_socket) {
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perror("accept");
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return;
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}
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int ptm_fd = posix_openpt(O_RDWR);
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if (ptm_fd < 0) {
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perror("posix_openpt");
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client_socket->close();
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return;
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}
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if (grantpt(ptm_fd) < 0) {
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perror("grantpt");
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client_socket->close();
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return;
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}
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if (unlockpt(ptm_fd) < 0) {
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perror("unlockpt");
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client_socket->close();
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return;
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}
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run_command(ptm_fd, command);
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auto client = Client::create(id, move(client_socket), ptm_fd);
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client->on_exit = [&clients, id] { clients.remove(id); };
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clients.set(id, client);
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};
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int rc = event_loop.exec();
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if (rc != 0) {
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fprintf(stderr, "event loop exited badly; rc=%d", rc);
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exit(1);
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}
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return 0;
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}
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