-/* ttt.c - client-server tic-tac-toe game
+/* ttt-client.c - client handling code for tic-tac-toe game server
*
* Copyright © 2005 Carl Worth
*
* Author: Carl Worth <cworth@cworth.org>
*/
-#include "ttt.h"
+#include "ttt-client.h"
-int
-main (int argc, char **argv)
+#include "ttt-server.h"
+#include "ttt-socket.h"
+#include "ttt-error.h"
+
+struct _ttt_client {
+ pthread_mutex_t mutex;
+ pthread_t thread;
+
+ ttt_server_t *server;
+ int socket;
+
+ int id;
+
+ char buf[TTT_CLIENT_BUF_SIZE];
+ char *buf_head;
+ char *buf_tail;
+
+ char *request;
+ int request_size;
+ int request_len;
+};
+
+static void
+_ttt_client_init (ttt_client_t *client,
+ ttt_server_t *server,
+ int socket)
+{
+ pthread_mutex_init (&client->mutex, NULL);
+
+ client->server = server;
+ client->socket = socket;
+
+ client->buf_head = client->buf;
+ client->buf_tail = client->buf;
+
+ client->request = NULL;
+ client->request_size = 0;
+ client->request_len = 0;
+
+ /* XXX: Probably want to register only as the result of the HELO
+ command. Not only will that match the protocol correctly, but
+ it will also eliminate a race condition here. */
+ client->id = ttt_server_register_client (server, client);
+}
+
+static void
+_ttt_client_fini (ttt_client_t *client)
+{
+ pthread_mutex_lock (&client->mutex);
+
+ ttt_server_unregister_client (client->server, client);
+
+ shutdown (client->socket, SHUT_RDWR);
+
+ free (client->request);
+
+ pthread_mutex_unlock (&client->mutex);
+
+ pthread_mutex_destroy (&client->mutex);
+}
+
+static void
+_append_to_request (ttt_client_t *client,
+ const char *buf,
+ int size)
+{
+ int size_needed = client->request_len + size;
+
+ if (size_needed > client->request_size) {
+ if (client->request_size == 0) {
+ client->request_size = size_needed;
+ } else {
+ while (size_needed > client->request_size)
+ client->request_size *= 2;
+ }
+
+ client->request = xrealloc (client->request, client->request_size);
+ }
+
+ memcpy (client->request + client->request_len,
+ buf, size);
+
+ client->request_len += size;
+}
+
+static ttt_status_t
+_read_into_request_until (ttt_client_t *client, char delimeter)
+{
+ ttt_bool_t found_delimeter = FALSE;
+ int bytes_read;
+ char *s;
+
+ client->request_len = 0;
+
+ while (1) {
+
+ if (client->buf_tail >= client->buf_head) {
+ bytes_read = xread (client->socket,
+ client->buf,
+ TTT_CLIENT_BUF_SIZE);
+ if (bytes_read == 0)
+ return TTT_STATUS_EOF;
+ client->buf_head = client->buf;
+ client->buf_tail = client->buf_head + bytes_read;
+ }
+
+ for (s = client->buf_head; s < client->buf_tail; s++) {
+ if (*s == delimeter) {
+ found_delimeter = TRUE;
+ s++;
+ break;
+ }
+ }
+
+ _append_to_request (client,
+ client->buf_head,
+ s - client->buf_head);
+ client->buf_head = s;
+
+ if (found_delimeter)
+ return TTT_STATUS_SUCCESS;
+ }
+}
+
+static ttt_status_t
+_read_request (ttt_client_t *client)
+{
+ ttt_status_t status;
+ static const char null_terminator = '\0';
+
+ status = _read_into_request_until (client, '\n');
+ if (status)
+ return status;
+
+ _append_to_request (client, &null_terminator, 1);
+
+ return TTT_STATUS_SUCCESS;
+}
+
+static ttt_error_t
+_execute_request (ttt_client_t *client)
+{
+ ttt_server_broadcast (client->server, client->request);
+
+ return TTT_ERROR_NONE;
+}
+
+static void *
+_handle_requests_thread (void *closure)
{
- ttt_args_t args;
- int args_first;
+ ttt_status_t status;
+ ttt_error_t error;
+ ttt_client_t *client = closure;
- ttt_args_parse (&args, argc, argv, &args_first);
+ while (1) {
- /* XXX: insert code here */
+ status = _read_request (client);
+ if (status == TTT_STATUS_EOF)
+ break;
+ if (status)
+ ASSERT_NOT_REACHED;
- return 0;
+ error = _execute_request (client);
+ if (error)
+ ttt_client_send (client, ttt_error_string (error));
+ }
+
+ _ttt_client_fini (client);
+ free (client);
+
+ return (void *) 0;
+}
+
+/* Exported: See ttt-client.h for documentation. */
+void
+ttt_client_new (void *closure, int client_socket)
+{
+ ttt_server_t *server = closure;
+ ttt_client_t *client;
+ int err;
+
+ client = xmalloc (sizeof (ttt_client_t));
+
+ _ttt_client_init (client, server, client_socket);
+
+ err = pthread_create (&client->thread, NULL,
+ _handle_requests_thread, client);
+ if (err != 0) {
+ fprintf (stderr, "Error: pthread_create failed: %s. Aborting.\n",
+ strerror (err));
+ exit (1);
+ }
+}
+
+/* Exported: See ttt-client.h for documentation. */
+void
+ttt_client_send (ttt_client_t *client, const char *message)
+{
+ pthread_mutex_lock (&client->mutex);
+
+ ttt_socket_write (client->socket, message, strlen (message));
+
+ pthread_mutex_unlock (&client->mutex);
+}
+
+/* Exported: See ttt-client.h for documentation. */
+int
+ttt_client_get_id (ttt_client_t *client)
+{
+ return client->id;
}