#include "ttt-client.h"
+#include "ttt-error.h"
+#include "ttt-lex.h"
#include "ttt-server.h"
#include "ttt-socket.h"
-#include "ttt-error.h"
+#include "ttt-token.h"
struct _ttt_client {
pthread_mutex_t mutex;
- pthread_t thread;
+ pthread_t thread;
+
+ ttt_server_t *server;
+ int socket;
+ yyscan_t scanner;
+
+ char **request_strings;
+ int num_request_strings;
+
+ char *name;
+ ttt_bool_t registered;
+ int num_wins;
+};
+
+typedef ttt_error_t (*ttt_command_func_t) (ttt_client_t *client,
+ char **args,
+ int num_args);
+
+static ttt_error_t
+_ttt_client_execute_helo (ttt_client_t *client,
+ char **args,
+ int num_args);
+
+static ttt_error_t
+_ttt_client_execute_who (ttt_client_t *client,
+ char **args,
+ int num_args);
+
+static ttt_error_t
+_ttt_client_execute_quit (ttt_client_t *client,
+ char **args,
+ int num_args);
+
+static ttt_error_t
+_ttt_client_execute_message (ttt_client_t *client,
+ char **args,
+ int num_args);
- ttt_server_t *server;
- int socket;
- int id;
- char buf[TTT_CLIENT_BUF_SIZE];
- char *buf_head;
- char *buf_tail;
+typedef struct _ttt_command_description {
+ const char *command;
+ int args_required;
+ ttt_command_func_t execute;
+} ttt_command_description_t;
- char *request;
- int request_size;
- int request_len;
+ttt_command_description_t command_descriptions[] = {
+ {"HELO", 1, _ttt_client_execute_helo},
+ {"WHO", 0, _ttt_client_execute_who },
+ {"QUIT", 0, _ttt_client_execute_quit},
+ {"MESSAGE", 1, _ttt_client_execute_message}
};
+#define ARRAY_SIZE(arr) (sizeof(arr)/sizeof(arr[0]))
+
+static ttt_error_t
+_ttt_client_execute_helo (ttt_client_t *client,
+ char **args,
+ int num_args)
+{
+ ttt_error_t error;
+ char *response;
+
+ assert (num_args == 1);
+
+ ttt_client_set_name (client, args[0]);
+
+ error = ttt_server_register_client (client->server, client);
+ if (error)
+ return error;
+
+ client->registered = TRUE;
+
+ xasprintf (&response, "HELO %s %s %s\n",
+ client->name,
+ ttt_server_get_host (client->server),
+ ttt_server_get_port (client->server));
+
+ ttt_client_send (client, response);
+
+ free (response);
+
+ return TTT_ERROR_NONE;
+}
+
+static ttt_error_t
+_ttt_client_execute_who (ttt_client_t *client,
+ char **args,
+ int num_args)
+{
+ char *response;
+
+ assert (num_args == 0);
+
+ response = ttt_server_who (client->server);
+
+ ttt_client_send (client, response);
+
+ free (response);
+
+ return TTT_ERROR_NONE;
+}
+
+static ttt_error_t
+_ttt_client_execute_quit (ttt_client_t *client,
+ char **args,
+ int num_args)
+{
+ assert (num_args == 0);
+
+ return TTT_ERROR_QUIT_REQUESTED;
+}
+
+static ttt_error_t
+_ttt_client_execute_message (ttt_client_t *client,
+ char **args,
+ int num_args)
+{
+ char *response;
+ int i;
+
+ assert (num_args > 0);
+
+ xasprintf(&response, "MESSAGE\n");
+ ttt_client_send (client, response);
+
+ xasprintf(&response, "NOTICE MESSAGE %s", client->name);
+ for (i=0; i<num_args; i++){
+ xasprintf(&response, "%s %s",response,args[i]);
+
+ }
+ xasprintf(&response, "%s\n",response);
+ ttt_server_broadcast (client->server,response);
+
+ free (response);
+ return TTT_ERROR_NONE;
+
+
+}
+
+static void
+_free_request (ttt_client_t *client);
+
static void
_ttt_client_init (ttt_client_t *client,
ttt_server_t *server,
int socket)
{
+ FILE *file;
+
pthread_mutex_init (&client->mutex, NULL);
client->server = server;
client->socket = socket;
- client->buf_head = client->buf;
- client->buf_tail = client->buf;
+ file = xfdopen (socket, "r");
+ yylex_init(&client->scanner);
+ yyset_in (file, client->scanner);
- client->request = NULL;
- client->request_size = 0;
- client->request_len = 0;
+ client->request_strings = NULL;
+ client->num_request_strings = 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);
+ client->name = NULL;
+ client->registered = FALSE;
+ client->num_wins = 0;
}
static void
{
pthread_mutex_lock (&client->mutex);
- ttt_server_unregister_client (client->server, client);
+ if (client->registered)
+ ttt_server_unregister_client (client->server, client);
+
+ free (client->name);
+ client->name = NULL;
+ yylex_destroy (client->scanner);
shutdown (client->socket, SHUT_RDWR);
- free (client->request);
+ _free_request (client);
pthread_mutex_unlock (&client->mutex);
pthread_mutex_destroy (&client->mutex);
}
+/* XXX: The memory management for the request strings is pretty cheesy. */
static void
_append_to_request (ttt_client_t *client,
- const char *buf,
- int size)
+ const char *string)
{
- int size_needed = client->request_len + size;
+ client->num_request_strings++;
+ client->request_strings =
+ xrealloc (client->request_strings,
+ client->num_request_strings * sizeof (char *));
- 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_strings[client->num_request_strings - 1] = xstrdup (string);
+}
- client->request = xrealloc (client->request, client->request_size);
- }
+static void
+_free_request (ttt_client_t *client)
+{
+ int i;
+
+ for (i = 0; i < client->num_request_strings; i++)
+ free (client->request_strings[i]);
- memcpy (client->request + client->request_len,
- buf, size);
+ free (client->request_strings);
- client->request_len += size;
+ client->request_strings = NULL;
+ client->num_request_strings = 0;
}
static ttt_status_t
-_read_into_request_until (ttt_client_t *client, char delimeter)
+_read_request (ttt_client_t *client)
{
- ttt_bool_t found_delimeter = FALSE;
- int bytes_read;
- char *s;
+ ttt_token_t token;
- client->request_len = 0;
+ _free_request (client);
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;
- }
+ token = yylex (client->scanner);
+ /* Yes, EOF in two different enums is pretty ugly. */
+ if (token == TTT_TOKEN_EOF)
+ return TTT_STATUS_EOF;
+
+ if (token == TTT_TOKEN_NEWLINE) {
+ if (client->num_request_strings)
+ return TTT_STATUS_SUCCESS;
+ else
+ continue;
}
- _append_to_request (client,
- client->buf_head,
- s - client->buf_head);
- client->buf_head = s;
+ assert (token == TTT_TOKEN_STRING);
- if (found_delimeter)
- return TTT_STATUS_SUCCESS;
+ _append_to_request (client, yyget_text (client->scanner));
}
}
-static ttt_status_t
-_read_request (ttt_client_t *client)
+static ttt_error_t
+_execute_request (ttt_client_t *client)
{
- ttt_status_t status;
- static const char null_terminator = '\0';
+ int i;
- status = _read_into_request_until (client, '\n');
- if (status)
- return status;
+ char *command = client->request_strings[0];
+ int num_args = client->num_request_strings-1;
+ ttt_command_description_t *desc;
- _append_to_request (client, &null_terminator, 1);
+ for (i=0; i < strlen (command); i++)
+ command[i] = toupper (command[i]);
- return TTT_STATUS_SUCCESS;
-}
-
-static ttt_error_t
-_execute_request (ttt_client_t *client)
-{
- ttt_server_broadcast (client->server, client->request);
+ for (i=0; i < ARRAY_SIZE(command_descriptions); i++) {
+ desc = &command_descriptions[i];
+ if (strcmp(command, desc->command) == 0) {
+ if (num_args < desc->args_required)
+ return TTT_ERROR_SYNTAX;
+ return (desc->execute) (client, &client->request_strings[1], num_args);
+ }
+ }
- return TTT_ERROR_NONE;
+ return TTT_ERROR_COMMAND;
}
static void *
ASSERT_NOT_REACHED;
error = _execute_request (client);
+ if (error == TTT_ERROR_QUIT_REQUESTED)
+ break;
if (error)
ttt_client_send (client, ttt_error_string (error));
}
pthread_mutex_unlock (&client->mutex);
}
+/* Exported: See ttt-client.h for documentation. */
+const char*
+ttt_client_get_name (ttt_client_t *client)
+{
+ return client->name;
+}
+
+/* Exported: See ttt-client.h for documentation. */
+void
+ttt_client_set_name (ttt_client_t *client, const char *name)
+{
+ free (client->name);
+ client->name = xstrdup (name);
+}
+
/* Exported: See ttt-client.h for documentation. */
int
-ttt_client_get_id (ttt_client_t *client)
+ttt_client_get_num_wins (ttt_client_t *client)
{
- return client->id;
+ return client->num_wins;
}
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