+#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;
+
+ 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->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;
+ const char *name;
+
+ pthread_mutex_lock (&server->mutex);
+
+ name = ttt_client_get_name (client);
+
+ assert (name != NULL);
+
+ if (name[0] == '\0')
+ return TTT_ERROR_INVALID_NAME;
+
+ for (i = 0; i < server->num_clients; i++) {
+ if (strcmp (ttt_client_get_name (server->clients[i]), name) == 0) {
+ error = TTT_ERROR_INVALID_NAME;
+ goto CLEANUP_LOCK;
+ }
+ }
+
+ printf ("Client %s has joined.\r\n", 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.\r\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);
+}
+
+/* Exported: See ttt-server.h for documentation. */
+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_who (ttt_server_t *server)
+{
+ int i;
+ char *response;
+
+ pthread_mutex_lock (&server->mutex);
+
+ xasprintf (&response, "WHO");
+
+ for (i = 0; i < server->num_clients; i++)
+ xasprintf (&response, "%s %s %d",
+ response,
+ ttt_client_get_name (server->clients[i]),
+ ttt_client_get_num_wins (server->clients[i]));
+
+ xasprintf (&response, "%s\r\n", response);
+
+ pthread_mutex_unlock (&server->mutex);
+
+ return response;
+}
+
+/* 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\r\n"
+"TCP/IP server, acting something like a rather braindead chat server.\r\n"
+"The server is currently listening on:\r\n"
+"\r\n %s:%s\r\n"
+"\r\nTo test this, simply connect one or more clients to that host and port.\r\n"
+"For example:\r\n"
+"\r\n telnet %s %s\r\n"
+"\r\nOnce you have connected a client, the server will send each line of text\r\n"
+"it receives to all connected clients. The server reports client joins and\r\n"
+"departures on stdout.\r\n"
+"\r\nNote that to terminate the telnet client you type Control-], then\r\n"
+"<Enter>, then \"close\" (and <Enter>) at the \"telnet> \" prompt.\r\n"
+"\r\nHave fun!\r\n"
+"-Carl\r\n"
+"\r\nPS. At this point we're ready to leave the demonstration phase and to\r\n"
+"begin implementing TTTP (tic-tac-toe protocol) as well as fixing the\r\n"
+"protocol specifcation. We don't need a custom client to move forward on\r\n"
+"the server (that is one of the ideas behind using a telnet-compatible\r\n"
+"protocol), but a custom client would still be a fine project for a\r\n"
+"motivated beginning programmer.\r\n\r\n";
+
+static void
+_ttt_server_accept (void *closure, int client_socket)
+{
+ ttt_server_t *server = closure;
+
+ ttt_client_new (server, client_socket);
+}