X-Git-Url: https://git.cworth.org/git?p=ttt;a=blobdiff_plain;f=src%2Fttt-server.c;h=2bc3a529b51efca60af87679488e248facd84b46;hp=b42db7a95064811b95fff78b4f0070236b4fe69c;hb=15672ac8305a1c5ba0d9bf6edabb0a194c30628e;hpb=80c3009d01077a141a0803267a1f0aff217ed61c

diff --git a/src/ttt-server.c b/src/ttt-server.c
index b42db7a..2bc3a52 100644
--- a/src/ttt-server.c
+++ b/src/ttt-server.c
@@ -1,4 +1,4 @@
-/* ttt.c - client-server tic-tac-toe game
+/* ttt-server.c - tic-tac-toe game server
  *
  * Copyright © 2005 Carl Worth
  *
@@ -20,16 +20,183 @@
  */
 
 #include "ttt.h"
+#include "ttt-args.h"
+#include "ttt-client.h"
+#include "ttt-socket.h"
+
+struct _ttt_server {
+    pthread_mutex_t mutex;
+
+    int next_client_id;
+
+    ttt_client_t **clients;
+    int clients_size;
+    int num_clients;
+};
+
+static void
+ttt_server_init (ttt_server_t *server)
+{
+    pthread_mutex_init (&server->mutex, NULL);
+
+    server->next_client_id = 0;
+
+    server->clients = NULL;
+    server->clients_size = 0;
+    server->num_clients = 0;
+}
+
+static ttt_client_t *
+ttt_server_create_client (ttt_server_t *server, int client_socket)
+{
+    ttt_client_t *client;
+
+    pthread_mutex_lock (&server->mutex);
+
+    client = ttt_client_create (server, client_socket,
+				server->next_client_id++);
+
+    printf ("Client %d has joined.\n", client->id);
+
+    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;
+
+    pthread_mutex_unlock (&server->mutex);
+
+    return client;
+}
+
+static void
+ttt_server_destroy_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 %d has left.\n", client->id);
+
+    memmove (&server->clients[i], &server->clients[i+1],
+	     (server->num_clients - i - 1) * sizeof (ttt_client_t *));
+
+    server->num_clients--;
+
+    ttt_client_destroy (client);
+
+    pthread_mutex_unlock (&server->mutex);
+}
+
+static void *
+_handle_client_requests_thread (void *closure)
+{
+    ttt_client_t *client = closure;
+    ttt_server_t *server = client->server;
+    char *request;
+
+    while (1) {
+
+	request = ttt_client_read_line (client);
+	if (request == NULL)
+	    break;
+
+	ttt_server_broadcast (client->server, request);
+    }
+
+    ttt_server_destroy_client (server, client);
+
+    return (void *) 0;
+}
+
+static void
+_accept_client (void *closure, int client_socket)
+{
+    ttt_server_t *server = closure;
+    ttt_client_t *client;
+    int err;
+    
+    client = ttt_server_create_client (server, client_socket);
+
+    err = pthread_create (&client->thread, NULL,
+			  _handle_client_requests_thread, client);
+    if (err != 0) {
+	fprintf (stderr, "Error: pthread_create failed: %s. Aborting.\n",
+		 strerror (err));
+	exit (1);
+    }
+}
+
+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);
+}
+
+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";
 
 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);
 
-    /* XXX: insert code here */
+    while (1)
+	ttt_socket_accept (socket, _accept_client, &server);
 
-    return 0;
+    /* We only reach here if something bad happened. */
+    return 1;
 }