struct HandlerList *handlers;
/**
- * List of our current clients.
+ * Head of list of our current clients.
*/
- struct GNUNET_SERVER_Client *clients;
+ struct GNUNET_SERVER_Client *clients_head;
+
+ /**
+ * Head of list of our current clients.
+ */
+ struct GNUNET_SERVER_Client *clients_tail;
/**
* Head of linked list of functions to call on disconnects by clients.
{
/**
- * This is a linked list.
+ * This is a doubly linked list.
*/
struct GNUNET_SERVER_Client *next;
+ /**
+ * This is a doubly linked list.
+ */
+ struct GNUNET_SERVER_Client *prev;
+
/**
* Processing of incoming data.
*/
int in_process_client_buffer;
/**
- * We're about to close down this client due to some serious
- * error.
+ * We're about to close down this client.
*/
int shutdown_now;
};
+/**
+ * Scheduler says our listen socket is ready. Process it!
+ *
+ * @param cls handle to our server for which we are processing the listen
+ * socket
+ * @param tc reason why we are running right now
+ */
+static void
+process_listen_socket (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
/**
* Scheduler says our listen socket is ready. Process it!
*
struct GNUNET_SERVER_Handle *server = cls;
struct GNUNET_CONNECTION_Handle *sock;
struct GNUNET_SERVER_Client *client;
- struct GNUNET_NETWORK_FDSet *r;
unsigned int i;
server->listen_task = GNUNET_SCHEDULER_NO_TASK;
- r = GNUNET_NETWORK_fdset_create ();
- i = 0;
- while (NULL != server->listen_sockets[i])
- GNUNET_NETWORK_fdset_set (r, server->listen_sockets[i++]);
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
/* ignore shutdown, someone else will take care of it! */
- server->listen_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
- GNUNET_TIME_UNIT_FOREVER_REL, r, NULL,
- &process_listen_socket, server);
- GNUNET_NETWORK_fdset_destroy (r);
+ GNUNET_SERVER_resume (server);
return;
}
i = 0;
i++;
}
/* listen for more! */
- server->listen_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
- GNUNET_TIME_UNIT_FOREVER_REL, r, NULL,
- &process_listen_socket, server);
- GNUNET_NETWORK_fdset_destroy (r);
+ GNUNET_SERVER_resume (server);
}
static struct GNUNET_NETWORK_Handle *
open_listen_socket (const struct sockaddr *serverAddr, socklen_t socklen)
{
- const static int on = 1;
struct GNUNET_NETWORK_Handle *sock;
uint16_t port;
int eno;
errno = 0;
return NULL;
}
- if (0 != port)
- {
- if (GNUNET_NETWORK_socket_setsockopt
- (sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof (on)) != GNUNET_OK)
- LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "setsockopt");
-#ifdef IPV6_V6ONLY
- if ((AF_INET6 == serverAddr->sa_family) &&
- (GNUNET_NETWORK_socket_setsockopt
- (sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)) != GNUNET_OK))
- LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "setsockopt");
-#endif
- }
/* bind the socket */
if (GNUNET_OK != GNUNET_NETWORK_socket_bind (sock, serverAddr, socklen))
{
"bind", port,
(AF_INET == serverAddr->sa_family) ? "IPv4" : "IPv6");
else if (AF_UNIX == serverAddr->sa_family)
- LOG (GNUNET_ERROR_TYPE_WARNING,
- _("`%s' failed for `%s': address already in use\n"), "bind",
- ((const struct sockaddr_un *) serverAddr)->sun_path);
+ {
+ const struct sockaddr_un *un = (const struct sockaddr_un *) serverAddr;
+ unsigned int off = 0;
+ if ('\0' == un->sun_path[0])
+ off = 1; /* some UNIXPATHs start with 0 */
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("`%s' failed for `%.*s': address already in use\n"), "bind",
+ (int) ((sizeof (un->sun_path) - off)),
+ (&un->sun_path[off]));
+ }
}
GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (sock));
errno = eno;
int require_found)
{
struct GNUNET_SERVER_Handle *server;
- struct GNUNET_NETWORK_FDSet *r;
- int i;
server = GNUNET_malloc (sizeof (struct GNUNET_SERVER_Handle));
server->idle_timeout = idle_timeout;
server->access_cls = access_cls;
server->require_found = require_found;
if (NULL != lsocks)
- {
- r = GNUNET_NETWORK_fdset_create ();
- i = 0;
- while (NULL != server->listen_sockets[i])
- GNUNET_NETWORK_fdset_set (r, server->listen_sockets[i++]);
- server->listen_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
- GNUNET_TIME_UNIT_FOREVER_REL, r, NULL,
- &process_listen_socket, server);
- GNUNET_NETWORK_fdset_destroy (r);
- }
+ GNUNET_SERVER_resume (server);
return server;
}
while (NULL != serverAddr[i])
{
seen = 0;
- for (k=0;k<i-1;k++)
+ for (k=0;k<i;k++)
if ( (socklen[k] == socklen[i]) &&
(0 == memcmp (serverAddr[k], serverAddr[i], socklen[i])) )
{
if (GNUNET_YES != server->in_soft_shutdown)
return;
- for (client = server->clients; NULL != client; client = client->next)
+ for (client = server->clients_head; NULL != client; client = client->next)
if (GNUNET_NO == client->is_monitor)
return; /* not done yet */
server->in_soft_shutdown = GNUNET_SYSERR;
}
+/**
+ * Suspend accepting connections from the listen socket temporarily.
+ *
+ * @param server server to stop accepting connections.
+ */
+void
+GNUNET_SERVER_suspend (struct GNUNET_SERVER_Handle *server)
+{
+ if (GNUNET_SCHEDULER_NO_TASK != server->listen_task)
+ {
+ GNUNET_SCHEDULER_cancel (server->listen_task);
+ server->listen_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+}
+
+
+/**
+ * Resume accepting connections from the listen socket.
+ *
+ * @param server server to stop accepting connections.
+ */
+void
+GNUNET_SERVER_resume (struct GNUNET_SERVER_Handle *server)
+{
+ struct GNUNET_NETWORK_FDSet *r;
+ unsigned int i;
+
+ if (NULL == server->listen_sockets)
+ return;
+ if (NULL == server->listen_sockets[0])
+ return; /* nothing to do, no listen sockets! */
+ if (NULL == server->listen_sockets[1])
+ {
+ /* simplified method: no fd set needed; this is then much simpler and
+ much more efficient */
+ server->listen_task =
+ GNUNET_SCHEDULER_add_read_net_with_priority (GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_SCHEDULER_PRIORITY_HIGH,
+ server->listen_sockets[0],
+ &process_listen_socket, server);
+ return;
+ }
+ r = GNUNET_NETWORK_fdset_create ();
+ i = 0;
+ while (NULL != server->listen_sockets[i])
+ GNUNET_NETWORK_fdset_set (r, server->listen_sockets[i++]);
+ server->listen_task =
+ GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
+ GNUNET_TIME_UNIT_FOREVER_REL, r, NULL,
+ &process_listen_socket, server);
+ GNUNET_NETWORK_fdset_destroy (r);
+}
+
+
/**
* Stop the listen socket and get ready to shutdown the server
* once only 'monitor' clients are left.
GNUNET_free (server->listen_sockets);
server->listen_sockets = NULL;
}
- while (NULL != server->clients)
- GNUNET_SERVER_client_disconnect (server->clients);
+ while (NULL != server->clients_head)
+ GNUNET_SERVER_client_disconnect (server->clients_head);
while (NULL != (hpos = server->handlers))
{
server->handlers = hpos->next;
{
struct GNUNET_SERVER_Client *client = cls;
+ GNUNET_break (0 != client->warn_type); /* type should never be 0 here, as we don't use 0 */
client->warn_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
&warn_no_receive_done, client);
}
if (NULL != sender)
{
- if (0 == sender->suspended)
+ if ( (0 == sender->suspended) &&
+ (GNUNET_SCHEDULER_NO_TASK == sender->warn_task) )
{
- sender->warn_start = GNUNET_TIME_absolute_get ();
+ GNUNET_break (0 != type); /* type should never be 0 here, as we don't use 0 */
+ sender->warn_start = GNUNET_TIME_absolute_get ();
sender->warn_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
&warn_no_receive_done, sender);
}
if ((GNUNET_SYSERR == ret) || (GNUNET_YES == client->shutdown_now))
GNUNET_SERVER_client_disconnect (client);
- GNUNET_SERVER_client_drop (client);
}
ret =
client->server->mst_receive (client->server->mst_cls, client->mst,
client, buf, available, GNUNET_NO, GNUNET_YES);
- else
+ else if (NULL != client->mst)
+ {
ret =
GNUNET_SERVER_mst_receive (client->mst, client, buf, available, GNUNET_NO,
GNUNET_YES);
+ }
+ else
+ {
+ GNUNET_break (0);
+ return;
+ }
+
process_mst (client, ret);
+ GNUNET_SERVER_client_drop (client);
}
{
struct GNUNET_SERVER_Client *client = cls;
+ GNUNET_assert (GNUNET_YES != client->shutdown_now);
client->restart_task = GNUNET_SCHEDULER_NO_TASK;
if (GNUNET_NO == client->receive_pending)
{
GNUNET_SERVER_client_keep (client);
client->receive_pending = GNUNET_NO;
process_mst (client, GNUNET_NO);
+ GNUNET_SERVER_client_drop (client);
}
* @param cls closure (struct GNUNET_SERVER_Handle)
* @param client identification of the client (struct GNUNET_SERVER_Client*)
* @param message the actual message
+ *
+ * @return GNUNET_OK on success, GNUNET_SYSERR to stop further processing
*/
-static void
+static int
client_message_tokenizer_callback (void *cls, void *client,
const struct GNUNET_MessageHeader *message)
{
sender->in_process_client_buffer = GNUNET_YES;
ret = GNUNET_SERVER_inject (server, sender, message);
sender->in_process_client_buffer = GNUNET_NO;
- if (GNUNET_OK != ret)
+ if ( (GNUNET_OK != ret) || (GNUNET_YES == sender->shutdown_now) )
+ {
GNUNET_SERVER_client_disconnect (sender);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
}
client->reference_count = 1;
client->server = server;
client->last_activity = GNUNET_TIME_absolute_get ();
- client->next = server->clients;
client->idle_timeout = server->idle_timeout;
- server->clients = client;
+ GNUNET_CONTAINER_DLL_insert (server->clients_head,
+ server->clients_tail,
+ client);
if (NULL != server->mst_create)
client->mst =
server->mst_create (server->mst_cls, client);
else
client->mst =
GNUNET_SERVER_mst_create (&client_message_tokenizer_callback, server);
+ GNUNET_assert (NULL != client->mst);
client->receive_pending = GNUNET_YES;
GNUNET_CONNECTION_receive (client->connection,
GNUNET_SERVER_MAX_MESSAGE_SIZE - 1,
}
+/**
+ * Destroy the connection that is passed in via 'cls'. Used
+ * as calling 'GNUNET_CONNECTION_destroy' from within a function
+ * that was itself called from within 'process_notify' of
+ * 'connection.c' is not allowed (see #2329).
+ *
+ * @param cls connection to destroy
+ * @param tc scheduler context (unused)
+ */
+static void
+destroy_connection (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_CONNECTION_Handle *connection = cls;
+
+ GNUNET_CONNECTION_destroy (connection);
+}
+
+
/**
* Ask the server to disconnect from the given client.
* This is the same as returning GNUNET_SYSERR from a message
void
GNUNET_SERVER_client_disconnect (struct GNUNET_SERVER_Client *client)
{
- struct GNUNET_SERVER_Client *prev;
- struct GNUNET_SERVER_Client *pos;
- struct GNUNET_SERVER_Handle *server;
+ struct GNUNET_SERVER_Handle *server = client->server;
struct NotifyList *n;
- unsigned int rc;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Client is being disconnected from the server.\n");
GNUNET_CONNECTION_receive_cancel (client->connection);
client->receive_pending = GNUNET_NO;
}
- server = client->server;
- rc = client->reference_count;
- if (GNUNET_YES != client->shutdown_now)
+ client->shutdown_now = GNUNET_YES;
+ client->reference_count++; /* make sure nobody else clean up client... */
+ if ( (NULL != client->mst) &&
+ (NULL != server) )
{
- client->shutdown_now = GNUNET_YES;
- prev = NULL;
- pos = server->clients;
- while ((NULL != pos) && (pos != client))
- {
- prev = pos;
- pos = pos->next;
- }
- GNUNET_assert (NULL != pos);
- if (NULL == prev)
- server->clients = pos->next;
+ GNUNET_CONTAINER_DLL_remove (server->clients_head,
+ server->clients_tail,
+ client);
+ if (NULL != server->mst_destroy)
+ server->mst_destroy (server->mst_cls, client->mst);
else
- prev->next = pos->next;
- if (GNUNET_SCHEDULER_NO_TASK != client->restart_task)
- {
- GNUNET_SCHEDULER_cancel (client->restart_task);
- client->restart_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (GNUNET_SCHEDULER_NO_TASK != client->warn_task)
- {
- GNUNET_SCHEDULER_cancel (client->warn_task);
- client->warn_task = GNUNET_SCHEDULER_NO_TASK;
- }
+ GNUNET_SERVER_mst_destroy (client->mst);
+ client->mst = NULL;
for (n = server->disconnect_notify_list_head; NULL != n; n = n->next)
n->callback (n->callback_cls, client);
}
- if (rc > 0)
+ client->reference_count--;
+ if (client->reference_count > 0)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"RC still positive, not destroying everything.\n");
+ client->server = NULL;
return;
}
if (GNUNET_YES == client->in_process_client_buffer)
"Still processing inputs, not destroying everything.\n");
return;
}
-
if (GNUNET_YES == client->persist)
GNUNET_CONNECTION_persist_ (client->connection);
if (NULL != client->th.cth)
GNUNET_SERVER_notify_transmit_ready_cancel (&client->th);
- GNUNET_CONNECTION_destroy (client->connection);
-
- if (NULL != server->mst_destroy)
- server->mst_destroy (server->mst_cls, client->mst);
- else
- GNUNET_SERVER_mst_destroy (client->mst);
+ (void) GNUNET_SCHEDULER_add_now (&destroy_connection,
+ client->connection);
+ /* need to cancel again, as it might have been re-added
+ in the meantime (i.e. during callbacks) */
+ if (GNUNET_SCHEDULER_NO_TASK != client->warn_task)
+ {
+ GNUNET_SCHEDULER_cancel (client->warn_task);
+ client->warn_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (GNUNET_YES == client->receive_pending)
+ {
+ GNUNET_CONNECTION_receive_cancel (client->connection);
+ client->receive_pending = GNUNET_NO;
+ }
GNUNET_free (client);
/* we might be in soft-shutdown, test if we're done */
- test_monitor_clients (server);
+ if (NULL != server)
+ test_monitor_clients (server);
}
{
struct GNUNET_SERVER_Client *client = cls;
GNUNET_CONNECTION_TransmitReadyNotify callback;
- size_t ret;
client->th.cth = NULL;
callback = client->th.callback;
client->th.callback = NULL;
- ret = callback (client->th.callback_cls, size, buf);
- if (ret > 0)
- client->last_activity = GNUNET_TIME_absolute_get ();
- return ret;
+ client->last_activity = GNUNET_TIME_absolute_get ();
+ return callback (client->th.callback_cls, size, buf);
}
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"GNUNET_SERVER_receive_done called with failure indication\n");
- GNUNET_SERVER_client_disconnect (client);
+ if ( (client->reference_count > 0) || (client->suspended > 0) )
+ client->shutdown_now = GNUNET_YES;
+ else
+ GNUNET_SERVER_client_disconnect (client);
return;
}
if (client->suspended > 0)
projects / oweals / gnunet.git / blobdiff