*/
#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"
#include "ttt-socket.h"
+#include "ttt-token.h"
+
+struct _ttt_client {
+ pthread_mutex_t mutex;
+ 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."},
+
+ {"HELP", 0, 1, _ttt_client_execute_help,
+ "HELP <command> ", "Display help for a command."},
+
+ {"MESSAGE", 1, 1, _ttt_client_execute_message,
+ "MESSAGE <message> ", "Send a message to everyone."},
+
+ {"QUIT", 0, 0, _ttt_client_execute_quit,
+ "QUIT ", "Quit session."},
-ttt_client_t *
-ttt_client_create (ttt_server_t *server, int socket, int id)
+ {"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_client_t *client;
+ ttt_error_t error;
+ char *response;
+ char *notice;
- client = xmalloc (sizeof (ttt_client_t));
+ 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);
+
+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->id = id;
-
- 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;
- return client;
+ client->name = NULL;
+ client->registered = FALSE;
+ client->num_wins = 0;
}
-void
-ttt_client_destroy (ttt_client_t *client)
+static void
+_ttt_client_fini (ttt_client_t *client)
{
+ pthread_mutex_lock (&client->mutex);
+
+ 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);
- free (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
-ttt_client_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;
+ ttt_token_type_t token_type;
- client->request_len = 0;
+ _free_request (client);
while (1) {
+ token_type = yylex (client->scanner, &token);
+ /* Yes, EOF in two different enums is pretty ugly. */
+ if (token_type == TTT_TOKEN_TYPE_EOF)
+ return TTT_STATUS_EOF;
- 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;
+ if (token_type == TTT_TOKEN_TYPE_NEWLINE) {
+ if (client->num_request_strings)
+ return TTT_STATUS_SUCCESS;
+ else
+ continue;
}
- for (s = client->buf_head; s < client->buf_tail; s++) {
- if (*s == delimeter) {
- found_delimeter = TRUE;
- s++;
- break;
- }
- }
+ assert (token_type == TTT_TOKEN_TYPE_STRING);
+
+ _append_to_request (client, token.u.string);
+
+ free (token.u.string);
+ }
+}
+
+static ttt_error_t
+_execute_request (ttt_client_t *client)
+{
+ int i;
+
+ char *command = client->request_strings[0];
+ int num_args = client->num_request_strings-1;
+ ttt_command_description_t *desc;
- _append_to_request (client,
- client->buf_head,
- s - client->buf_head);
- client->buf_head = s;
+ for (i = 0; i < strlen (command); i++)
+ command[i] = toupper (command[i]);
- if (found_delimeter)
- return TTT_STATUS_SUCCESS;
+ 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_COMMAND;
}
-char *
-ttt_client_read_line (ttt_client_t *client)
+static void *
+_handle_requests_thread (void *closure)
{
ttt_status_t status;
- static const char null_terminator = '\0';
+ ttt_error_t error;
+ ttt_client_t *client = closure;
+
+ while (1) {
- status = ttt_client_read_into_request_until (client, '\n');
- if (status) {
- assert (status == TTT_STATUS_EOF);
- return NULL;
+ status = _read_request (client);
+ if (status == TTT_STATUS_EOF)
+ break;
+ if (status)
+ ASSERT_NOT_REACHED;
+
+ error = _execute_request (client);
+ if (error == TTT_ERROR_QUIT_REQUESTED)
+ break;
+ if (error)
+ ttt_client_send (client, ttt_error_string (error));
}
- _append_to_request (client, &null_terminator, 1);
+ _ttt_client_fini (client);
+ free (client);
- return client->request;
+ 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.\r\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. */
+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_num_wins (ttt_client_t *client)
+{
+ return client->num_wins;
+}
projects / ttt / blobdiff