-/* ttt.c - client-server tic-tac-toe game
+/* ttt-server.c - tic-tac-toe game server
*
* Copyright © 2005 Carl Worth
*
* Author: Carl Worth <cworth@cworth.org>
*/
-#include "ttt.h"
+#include "ttt-server.h"
+
+#include "ttt-args.h"
+#include "ttt-client.h"
+#include "ttt-error.h"
+#include "ttt-socket.h"
+
+struct _ttt_server {
+ pthread_mutex_t mutex;
+
+ const char *host;
+ const char *port;
+
+ int next_client_id;
+
+ ttt_client_t **clients;
+ int clients_size;
+ int num_clients;
+};
+
+static void
+ttt_server_init (ttt_server_t *server, const char *host, const char *port)
+{
+ pthread_mutex_init (&server->mutex, NULL);
+
+ server->host = host;
+ server->port = port;
+
+ server->next_client_id = 0;
+
+ server->clients = NULL;
+ server->clients_size = 0;
+ server->num_clients = 0;
+}
+
+/* Exported: See ttt-server.h for documentation. */
+ttt_error_t
+ttt_server_register_client (ttt_server_t *server, ttt_client_t *client)
+{
+ int i;
+ ttt_error_t error = TTT_ERROR_NONE;
+ char *name;
+
+ pthread_mutex_lock (&server->mutex);
+
+ name = xstrdup (ttt_client_get_name (client));
+
+ if (name == NULL) {
+ xasprintf(&name, "user%03d", server->next_client_id++);
+ ttt_client_set_name (client, name);
+ }
+
+ /* XXX: If generated name is not unique, this will return an error,
+ which violates the protocol. */
+ for (i = 0; i < server->num_clients; i++) {
+ if (strcmp (ttt_client_get_name (server->clients[i]), name) == 0) {
+ error = TTT_ERROR_INVALIDNAME;
+ goto CLEANUP_LOCK;
+ }
+ }
+
+ printf ("Client %s has joined.\n", name);
+ free (name);
+
+ server->num_clients++;
+
+ if (server->num_clients > server->clients_size) {
+ if (server->clients_size == 0)
+ server->clients_size = 1;
+ else
+ server->clients_size *= 2;
+
+ server->clients = xrealloc (server->clients,
+ server->clients_size * sizeof (ttt_client_t *));
+ }
+
+ server->clients [server->num_clients - 1] = client;
+
+ CLEANUP_LOCK:
+ pthread_mutex_unlock (&server->mutex);
+
+ return error;
+}
+
+/* Exported: See ttt-server.h for documentation. */
+void
+ttt_server_unregister_client (ttt_server_t *server, ttt_client_t *client)
+{
+ int i;
+
+ pthread_mutex_lock (&server->mutex);
+
+ for (i = 0; i < server->num_clients; i++)
+ if (server->clients[i] == client)
+ break;
+
+ assert (i < server->num_clients);
+
+ printf ("Client %s has left.\n", ttt_client_get_name (client));
+
+ memmove (&server->clients[i], &server->clients[i+1],
+ (server->num_clients - i - 1) * sizeof (ttt_client_t *));
+
+ server->num_clients--;
+
+ pthread_mutex_unlock (&server->mutex);
+}
+
+void
+ttt_server_broadcast (ttt_server_t *server, const char *message)
+{
+ int i;
+
+ pthread_mutex_lock (&server->mutex);
+
+ for (i = 0; i < server->num_clients; i++)
+ ttt_client_send (server->clients[i], message);
+
+ pthread_mutex_unlock (&server->mutex);
+}
+
+/* Exported: See ttt-server.h for documentation. */
+const char*
+ttt_server_get_host (ttt_server_t *server)
+{
+ return server->host;
+}
+
+/* Exported: See ttt-server.h for documentation. */
+const char*
+ttt_server_get_port (ttt_server_t *server)
+{
+ return server->port;
+}
+
+static const char *WELCOME_MESSAGE =
+"Welcome to ttt-server. So far, this program is still a demonstration\n"
+"TCP/IP server, acting something like a rather braindead chat server.\n"
+"The server is currently listening on:\n"
+"\n %s:%s\n"
+"\nTo test this, simply connect one or more clients to that host and port.\n"
+"For example:\n"
+"\n telnet %s %s\n"
+"\nOnce you have connected a client, the server will send each line of text\n"
+"it receives to all connected clients. The server reports client joins and\n"
+"departures on stdout.\n"
+"\nNote that to terminate the telnet client you type Control-], then\n"
+"<Enter>, then \"close\" (and <Enter>) at the \"telnet> \" prompt.\n"
+"\nHave fun!\n"
+"-Carl\n"
+"\nPS. At this point we're ready to leave the demonstration phase and to\n"
+"begin implementing TTTP (tic-tac-toe protocol) as well as fixing the\n"
+"protocol specifcation. We don't need a custom client to move forward on\n"
+"the server (that is one of the ideas behind using a telnet-compatible\n"
+"protocol), but a custom client would still be a fine project for a\n"
+"motivated beginning programmer.\n\n";
+
+static void
+_ttt_server_accept (void *closure, int client_socket)
+{
+ ttt_server_t *server = closure;
+
+ ttt_client_new (server, client_socket);
+}
int
main (int argc, char **argv)
{
ttt_args_t args;
- int args_first;
+ ttt_server_t server;
+ int socket;
+
+ ttt_args_parse (&args, argc, argv);
+
+ if (args.log_file)
+ xfreopen (args.log_file, "a", stderr);
+
+ socket = ttt_socket_create_server (args.host, args.port);
+
+ printf (WELCOME_MESSAGE, args.host, args.port, args.host, args.port);
- ttt_args_parse (&args, argc, argv, &args_first);
+ ttt_server_init (&server, args.host, args.port);
- /* XXX: insert code here */
+ while (1)
+ ttt_socket_accept (socket, _ttt_server_accept, &server);
- return 0;
+ /* We only reach here if something bad happened. */
+ return 1;
}
projects / ttt / blobdiff