1 /* ttt-server.c - tic-tac-toe game server
3 * Copyright © 2005 Carl Worth
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software Foundation,
17 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 * Author: Carl Worth <cworth@cworth.org>
22 #include "ttt-server.h"
25 #include "ttt-client.h"
26 #include "ttt-socket.h"
29 pthread_mutex_t mutex;
33 ttt_client_t **clients;
39 ttt_server_init (ttt_server_t *server)
41 pthread_mutex_init (&server->mutex, NULL);
43 server->next_client_id = 0;
45 server->clients = NULL;
46 server->clients_size = 0;
47 server->num_clients = 0;
50 /* Exported: See ttt-server.h for documentation. */
52 ttt_server_register_client (ttt_server_t *server, ttt_client_t *client)
56 pthread_mutex_lock (&server->mutex);
58 id = server->next_client_id++;
60 printf ("Client %d has joined.\n", id);
62 server->num_clients++;
64 if (server->num_clients > server->clients_size) {
65 if (server->clients_size == 0)
66 server->clients_size = 1;
68 server->clients_size *= 2;
70 server->clients = xrealloc (server->clients,
71 server->clients_size * sizeof (ttt_client_t *));
74 server->clients [server->num_clients - 1] = client;
76 pthread_mutex_unlock (&server->mutex);
81 /* Exported: See ttt-server.h for documentation. */
83 ttt_server_unregister_client (ttt_server_t *server, ttt_client_t *client)
87 pthread_mutex_lock (&server->mutex);
89 for (i = 0; i < server->num_clients; i++)
90 if (server->clients[i] == client)
93 assert (i < server->num_clients);
95 printf ("Client %d has left.\n", ttt_client_get_id (client));
97 memmove (&server->clients[i], &server->clients[i+1],
98 (server->num_clients - i - 1) * sizeof (ttt_client_t *));
100 server->num_clients--;
102 pthread_mutex_unlock (&server->mutex);
106 ttt_server_broadcast (ttt_server_t *server, const char *message)
110 pthread_mutex_lock (&server->mutex);
112 for (i = 0; i < server->num_clients; i++)
113 ttt_client_send (server->clients[i], message);
115 pthread_mutex_unlock (&server->mutex);
118 static const char *WELCOME_MESSAGE =
119 "Welcome to ttt-server. So far, this program is still a demonstration\n"
120 "TCP/IP server, acting something like a rather braindead chat server.\n"
121 "The server is currently listening on:\n"
123 "\nTo test this, simply connect one or more clients to that host and port.\n"
126 "\nOnce you have connected a client, the server will send each line of text\n"
127 "it receives to all connected clients. The server reports client joins and\n"
128 "departures on stdout.\n"
129 "\nNote that to terminate the telnet client you type Control-], then\n"
130 "<Enter>, then \"close\" (and <Enter>) at the \"telnet> \" prompt.\n"
133 "\nPS. At this point we're ready to leave the demonstration phase and to\n"
134 "begin implementing TTTP (tic-tac-toe protocol) as well as fixing the\n"
135 "protocol specifcation. We don't need a custom client to move forward on\n"
136 "the server (that is one of the ideas behind using a telnet-compatible\n"
137 "protocol), but a custom client would still be a fine project for a\n"
138 "motivated beginning programmer.\n\n";
141 _ttt_server_accept (void *closure, int client_socket)
143 ttt_server_t *server = closure;
145 ttt_client_new (server, client_socket);
149 main (int argc, char **argv)
155 ttt_args_parse (&args, argc, argv);
158 xfreopen (args.log_file, "a", stderr);
160 socket = ttt_socket_create_server (args.host, args.port);
162 printf (WELCOME_MESSAGE, args.host, args.port, args.host, args.port);
164 ttt_server_init (&server);
167 ttt_socket_accept (socket, _ttt_server_accept, &server);
169 /* We only reach here if something bad happened. */