Services: Move to Userland/Services/

Userland/Services/EchoServer/main.cpp

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "Client.h"
+#include <AK/HashMap.h>
+#include <AK/IPv4Address.h>
+#include <LibCore/ArgsParser.h>
+#include <LibCore/EventLoop.h>
+#include <LibCore/TCPServer.h>
+#include <LibCore/TCPSocket.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char** argv)
+{
+    if (pledge("stdio cpath unix fattr inet id accept", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    if (unveil("/tmp/rpc", "rwc") < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    if (unveil(nullptr, nullptr) < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    int port = 7;
+
+    Core::ArgsParser args_parser;
+    args_parser.add_option(port, "Port to listen on", "port", 'p', "port");
+    args_parser.parse(argc, argv);
+
+    if ((u16)port != port) {
+        warnln("Invalid port number: {}", port);
+        exit(1);
+    }
+
+    Core::EventLoop event_loop;
+
+    auto server = Core::TCPServer::construct();
+
+    if (!server->listen({}, port)) {
+        warnln("Listening on 0.0.0.0:{} failed", port);
+        exit(1);
+    }
+
+    HashMap<int, NonnullRefPtr<Client>> clients;
+    int next_id = 0;
+
+    server->on_ready_to_accept = [&next_id, &clients, &server] {
+        int id = next_id++;
+
+        auto client_socket = server->accept();
+        if (!client_socket) {
+            perror("accept");
+            return;
+        }
+
+        outln("Client {} connected", id);
+
+        auto client = Client::create(id, move(client_socket));
+        client->on_exit = [&clients, id] {
+            clients.remove(id);
+            outln("Client {} disconnected", id);
+        };
+        clients.set(id, client);
+    };
+
+    outln("Listening on 0.0.0.0:{}", port);
+
+    return event_loop.exec();
+}