#include "ttt-client.h"
+#define YY_DECL int yylex (yyscan_t yyscanner, ttt_token_t *token)
+
#include "ttt-error.h"
#include "ttt-lex.h"
#include "ttt-server.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_message (ttt_client_t *client,
+ char **args,
+ int num_args);
+
+static ttt_error_t
+_ttt_client_execute_help (ttt_client_t *client,
+ char **args,
+ int num_args);
+
+static ttt_error_t
+_ttt_client_execute_version (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);
+
+typedef struct _ttt_command_description {
+ const char *command;
+ int args_min;
+ int args_max;
+ ttt_command_func_t execute;
+ const char *usage;
+ const char *description;
+} ttt_command_description_t;
+
+ttt_command_description_t command_descriptions[] = {
+ {"HELO", 1, 1, _ttt_client_execute_helo,
+ "HELO <username> ", "Register."},
- ttt_server_t *server;
- int socket;
- yyscan_t scanner;
+ {"HELP", 0, 1, _ttt_client_execute_help,
+ "HELP <command> ", "Display help for a command."},
- int id;
+ {"MESSAGE", 1, 1, _ttt_client_execute_message,
+ "MESSAGE <message> ", "Send a message to everyone."},
- char **request_strings;
- int num_request_strings;
+ {"QUIT", 0, 0, _ttt_client_execute_quit,
+ "QUIT ", "Quit session."},
+
+ {"VERSION", 1, 1, _ttt_client_execute_version,
+ "VERSION <client-version>", "Negotiate protocol version."},
+
+ {"WHO", 0, 0, _ttt_client_execute_who,
+ "WHO ", "List registered users."}
};
+#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;
+ char *notice;
+
+ 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\r\n",
+ client->name,
+ ttt_server_get_host (client->server),
+ ttt_server_get_port (client->server));
+ ttt_client_send (client, response);
+
+ xasprintf (¬ice, "NOTICE USER %s\r\n",
+ client->name);
+ ttt_server_broadcast (client->server, notice);
+
+ free (notice);
+ 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);
+
+ if (!client->registered)
+ return TTT_ERROR_NO_NAME_SET;
+
+ response = xstrdup (ttt_server_who (client->server));
+ ttt_client_send (client, response);
+
+ free (response);
+
+ return TTT_ERROR_NONE;
+}
+
+static ttt_error_t
+_ttt_client_execute_message (ttt_client_t *client,
+ char **args,
+ int num_args)
+{
+ char *response;
+ char *notice;
+
+ assert (num_args == 1);
+
+ if (!client->registered)
+ return TTT_ERROR_NO_NAME_SET;
+
+ xasprintf (&response, "MESSAGE\r\n");
+ ttt_client_send (client, response);
+
+ xasprintf (¬ice, "NOTICE MESSAGE %s \"%s\"\r\n",
+ client->name,
+ args[0]);
+ ttt_server_broadcast (client->server, notice);
+
+ free (notice);
+ free (response);
+
+ return TTT_ERROR_NONE;
+}
+
+static ttt_error_t
+_ttt_client_execute_help (ttt_client_t *client,
+ char **args,
+ int num_args)
+{
+ char *response;
+ char *command;
+ ttt_command_description_t *desc;
+ int i;
+ ttt_bool_t is_command = FALSE;
+
+ if (num_args == 0) {
+ xasprintf (&response, "HELP \"\r\n"
+ "Available Commands:\r\n");
+ for (i = 0; i < ARRAY_SIZE(command_descriptions); i++) {
+ desc = &command_descriptions[i];
+ xasprintf (&response, "%s\r\n %s - %s\r\n",
+ response,
+ desc->usage,
+ desc->description);
+ }
+ xasprintf (&response, "%s\"\r\n", response);
+ } else {
+ command = args[0];
+ for (i = 0; i < strlen (command); i++)
+ command[i] = toupper (command[i]);
+ for (i = 0; i < ARRAY_SIZE(command_descriptions); i++) {
+ desc = &command_descriptions[i];
+ if (strcmp (desc->command, command) == 0) {
+ is_command = TRUE;
+ xasprintf (&response, "HELP %s \"\r\n"
+ "%s\r\n"
+ "\r\n"
+ "Usage:\r\n"
+ " %s\r\n"
+ "\"\r\n",
+ desc->command,
+ desc->description,
+ desc->usage);
+ /* XXX: Add detailed help. */
+ }
+ }
+ }
+
+ if ((num_args == 1) && (!is_command))
+ return TTT_ERROR_SYNTAX;
+
+ ttt_client_send (client, response);
+
+ free (response);
+ return TTT_ERROR_NONE;
+}
+
+static ttt_error_t
+_ttt_client_execute_version (ttt_client_t *client,
+ char **args,
+ int num_args)
+{
+ char *response;
+
+ assert (num_args == 1);
+
+ /* XXX: Argument is being ignored.
+ This is not completely implemented. */
+
+ xasprintf (&response, "VERSION 1\r\n");
+ 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)
+{
+ char *notice;
+
+ assert (num_args == 0);
+
+ if (!client->registered)
+ return TTT_ERROR_QUIT_REQUESTED;
+
+ xasprintf (¬ice, "NOTICE QUIT %s\r\n",
+ client->name);
+ ttt_server_broadcast (client->server, notice);
+
+ free (notice);
+
+ return TTT_ERROR_QUIT_REQUESTED;
+}
+
static void
_free_request (ttt_client_t *client);
client->socket = socket;
file = xfdopen (socket, "r");
- yylex_init(&client->scanner);
+ yylex_init (&client->scanner);
yyset_in (file, client->scanner);
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);
_read_request (ttt_client_t *client)
{
ttt_token_t token;
+ ttt_token_type_t token_type;
_free_request (client);
while (1) {
- token = yylex (client->scanner);
+ token_type = yylex (client->scanner, &token);
/* Yes, EOF in two different enums is pretty ugly. */
- if (token == TTT_TOKEN_EOF)
+ if (token_type == TTT_TOKEN_TYPE_EOF)
return TTT_STATUS_EOF;
- if (token == TTT_TOKEN_NEWLINE) {
+ if (token_type == TTT_TOKEN_TYPE_NEWLINE) {
if (client->num_request_strings)
return TTT_STATUS_SUCCESS;
else
continue;
}
- assert (token == TTT_TOKEN_STRING);
-
- _append_to_request (client, yyget_text (client->scanner));
+ assert (token_type == TTT_TOKEN_TYPE_STRING);
+
+ _append_to_request (client, token.u.string);
+
+ free (token.u.string);
}
}
{
int i;
- for (i=0; i < client->num_request_strings; i++)
- ttt_server_broadcast (client->server, client->request_strings[i]);
+ char *command = client->request_strings[0];
+ int num_args = client->num_request_strings-1;
+ ttt_command_description_t *desc;
+
+ for (i = 0; i < strlen (command); i++)
+ command[i] = toupper (command[i]);
+
+ for (i = 0; i < ARRAY_SIZE(command_descriptions); i++) {
+ desc = &command_descriptions[i];
+ if (strcmp (command, desc->command) == 0) {
+ if ((num_args < desc->args_min) || (num_args > desc->args_max))
+ 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));
}
err = pthread_create (&client->thread, NULL,
_handle_requests_thread, client);
if (err != 0) {
- fprintf (stderr, "Error: pthread_create failed: %s. Aborting.\n",
+ fprintf (stderr, "Error: pthread_create failed: %s. Aborting.\r\n",
strerror (err));
exit (1);
}
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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