-/* ttt.c - client-server tic-tac-toe game
+/* ttt-server.c - tic-tac-toe game server
*
* Copyright © 2005 Carl Worth
*
*/
#include "ttt.h"
+#include "ttt-client.h"
#include "ttt-socket.h"
+struct _ttt_server {
+ pthread_mutex_t mutex;
+
+ ttt_client_t **clients;
+ int num_clients;
+};
+
static void
-ttt_dispatch (int connected_socket)
+ttt_server_init (ttt_server_t *server)
{
-#define BUF_SIZE 1024
-
- while (1) {
- char buf[BUF_SIZE];
- int cnt;
- cnt = read (connected_socket, buf, BUF_SIZE);
- if (cnt == 0)
- break;
- write (0, buf, cnt);
- write (connected_socket, buf, cnt);
- }
+ pthread_mutex_init (&server->mutex, NULL);
+
+ server->clients = NULL;
+ server->num_clients = 0;
+}
+
+static void
+ttt_server_add_client (ttt_server_t *server, ttt_client_t *client)
+{
+ pthread_mutex_lock (&server->mutex);
+
+ server->num_clients++;
+ server->clients = xrealloc (server->clients,
+ server->num_clients * sizeof (ttt_client_t *));
+
+ server->clients [server->num_clients - 1] = client;
+
+ pthread_mutex_unlock (&server->mutex);
+}
+
+static void
+_accept_client (void *closure, int client_socket)
+{
+ ttt_server_t *server = closure;
+ ttt_client_t *client;
+
+ client = ttt_client_create (server, client_socket);
+
+ ttt_server_add_client (server, client);
+
+ ttt_client_handle_requests (client);
}
static const char *WELCOME_MESSAGE =
"Welcome to ttt-server. So far, this program is simply a demonstration\n"
-"of a TCP/IP server that handles one client at a time. The server is\n"
-"currently listening on:\n"
+"of a TCP/IP server capable of handling multiple simultaneous clients.\n"
+"The server is currently listening on:\n"
"\n %s:%s\n"
"\nTo test this program, simply connect a client to that host and port.\n"
"For example:\n"
"<Enter>, then \"close\" (and <Enter>) at the \"telnet> \" prompt.\n"
"\nHave fun!\n"
"-Carl\n"
-"\nPS. The server handles only one client at a time, but multiple clients\n"
-"may be able to connect simultaneously. Subsequent clients will see no\n"
-"output from the server until all previous clients exit.\n"
-"\nExtending the server to fork a new process for each client would be a fun\n"
-"project for a motivated student (as would writing a custom client program).\n\n";
+"\nPS. The server does support multiple clients, but there is not yet any\n"
+"interaction between the clients. The next step is probably to turn the\n"
+"server into a simple chat server. After that, we should have the necessary\n"
+"structure in place to start implementing the real tic-tac-toe protocol.\n\n";
int
main (int argc, char **argv)
{
ttt_args_t args;
+ ttt_server_t server;
int socket;
ttt_args_parse (&args, argc, argv);
if (args.log_file)
- stderr = xfreopen (args.log_file, "a", stderr);
+ 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_server_init (&server);
+
while (1)
- ttt_socket_accept (socket, ttt_dispatch);
+ ttt_socket_accept (socket, _accept_client, &server);
/* We only reach here if something bad happened. */
return 1;