/* -*- mode: C; c-file-style: "gnu" -*- */
/* dbus-transport.c DBusTransport object (internal to D-Bus implementation)
*
* Copyright (C) 2002, 2003 Red Hat Inc.
* Portion Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "dbus-transport-protected.h"
#include "dbus-transport-unix.h"
#include "dbus-transport-socket.h"
#include "dbus-connection-internal.h"
#include "dbus-watch.h"
#include "dbus-auth.h"
#include "dbus-address.h"
#ifdef DBUS_BUILD_TESTS
#include "dbus-server-debug-pipe.h"
#endif
/**
* @defgroup DBusTransport DBusTransport object
* @ingroup DBusInternals
* @brief "Backend" for a DBusConnection.
*
* Types and functions related to DBusTransport. A transport is an
* abstraction that can send and receive data via various kinds of
* network connections or other IPC mechanisms.
*
* @{
*/
/**
* @typedef DBusTransport
*
* Opaque object representing a way message stream.
* DBusTransport abstracts various kinds of actual
* transport mechanism, such as different network protocols,
* or encryption schemes.
*/
static void
live_messages_size_notify (DBusCounter *counter,
void *user_data)
{
DBusTransport *transport = user_data;
_dbus_transport_ref (transport);
#if 0
_dbus_verbose ("Counter value is now %d\n",
(int) _dbus_counter_get_value (counter));
#endif
/* disable or re-enable the read watch for the transport if
* required.
*/
if (transport->vtable->live_messages_changed)
(* transport->vtable->live_messages_changed) (transport);
_dbus_transport_unref (transport);
}
/**
* Initializes the base class members of DBusTransport. Chained up to
* by subclasses in their constructor. The server GUID is the
* globally unique ID for the server creating this connection
* and will be #NULL for the client side of a connection. The GUID
* is in hex format.
*
* @param transport the transport being created.
* @param vtable the subclass vtable.
* @param server_guid non-#NULL if this transport is on the server side of a connection
* @param address the address of the transport
* @returns #TRUE on success.
*/
dbus_bool_t
_dbus_transport_init_base (DBusTransport *transport,
const DBusTransportVTable *vtable,
const DBusString *server_guid,
const DBusString *address)
{
DBusMessageLoader *loader;
DBusAuth *auth;
DBusCounter *counter;
char *address_copy;
loader = _dbus_message_loader_new ();
if (loader == NULL)
return FALSE;
if (server_guid)
auth = _dbus_auth_server_new (server_guid);
else
auth = _dbus_auth_client_new ();
if (auth == NULL)
{
_dbus_message_loader_unref (loader);
return FALSE;
}
counter = _dbus_counter_new ();
if (counter == NULL)
{
_dbus_auth_unref (auth);
_dbus_message_loader_unref (loader);
return FALSE;
}
if (server_guid)
{
_dbus_assert (address == NULL);
address_copy = NULL;
}
else
{
_dbus_assert (address != NULL);
if (!_dbus_string_copy_data (address, &address_copy))
{
_dbus_counter_unref (counter);
_dbus_auth_unref (auth);
_dbus_message_loader_unref (loader);
return FALSE;
}
}
transport->refcount = 1;
transport->vtable = vtable;
transport->loader = loader;
transport->auth = auth;
transport->live_messages_size = counter;
transport->authenticated = FALSE;
transport->disconnected = FALSE;
transport->is_server = (server_guid != NULL);
transport->send_credentials_pending = !transport->is_server;
transport->receive_credentials_pending = transport->is_server;
transport->address = address_copy;
transport->unix_user_function = NULL;
transport->unix_user_data = NULL;
transport->free_unix_user_data = NULL;
transport->expected_guid = NULL;
/* Try to default to something that won't totally hose the system,
* but doesn't impose too much of a limitation.
*/
transport->max_live_messages_size = _DBUS_ONE_MEGABYTE * 63;
// sachin has modified this init values here
// This below is the original code
// transport->credentials.pid = -1;
// transport->credentials.uid = -1;
// transport->credentials.gid = -1;
transport->credentials.pid = 155;
transport->credentials.uid = 0;
transport->credentials.gid = 0;
_dbus_counter_set_notify (transport->live_messages_size,
transport->max_live_messages_size,
live_messages_size_notify,
transport);
if (transport->address)
_dbus_verbose ("Initialized transport on address %s\n", transport->address);
return TRUE;
}
/**
* Finalizes base class members of DBusTransport.
* Chained up to from subclass finalizers.
*
* @param transport the transport.
*/
void
_dbus_transport_finalize_base (DBusTransport *transport)
{
if (!transport->disconnected)
_dbus_transport_disconnect (transport);
if (transport->free_unix_user_data != NULL)
(* transport->free_unix_user_data) (transport->unix_user_data);
_dbus_message_loader_unref (transport->loader);
_dbus_auth_unref (transport->auth);
_dbus_counter_set_notify (transport->live_messages_size,
0, NULL, NULL);
_dbus_counter_unref (transport->live_messages_size);
dbus_free (transport->address);
dbus_free (transport->expected_guid);
}
/**
* Verifies if a given D-Bus address is a valid address
* by attempting to connect to it. If it is, returns the
* opened DBusTransport object. If it isn't, returns #NULL
* and sets @p error.
*
* @param error address where an error can be returned.
* @returns a new transport, or #NULL on failure.
*/
static DBusTransport*
check_address (const char *address, DBusError *error)
{
DBusAddressEntry **entries;
DBusTransport *transport = NULL;
int len, i;
_dbus_assert (address != NULL);
_dbus_assert (*address != '\0');
if (!dbus_parse_address (address, &entries, &len, error))
return FALSE; /* not a valid address */
for (i = 0; i < len; i++)
{
transport = _dbus_transport_open (entries[i], error);
if (transport != NULL)
break;
}
dbus_address_entries_free (entries);
return transport;
}
/**
* Creates a new transport for the "autostart" method.
* This creates a client-side of a transport.
*
* @param error address where an error can be returned.
* @returns a new transport, or #NULL on failure.
*/
static DBusTransport*
_dbus_transport_new_for_autolaunch (DBusError *error)
{
DBusString address;
DBusTransport *result = NULL;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
if (!_dbus_string_init (&address))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return NULL;
}
if (!_dbus_get_autolaunch_address (&address, error))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
goto out;
}
result = check_address (_dbus_string_get_const_data (&address), error);
if (result == NULL)
_DBUS_ASSERT_ERROR_IS_SET (error);
else
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
out:
_dbus_string_free (&address);
return result;
}
static DBusTransportOpenResult
_dbus_transport_open_autolaunch (DBusAddressEntry *entry,
DBusTransport **transport_p,
DBusError *error)
{
const char *method;
method = dbus_address_entry_get_method (entry);
_dbus_assert (method != NULL);
if (strcmp (method, "autolaunch") == 0)
{
*transport_p = _dbus_transport_new_for_autolaunch (error);
if (*transport_p == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return DBUS_TRANSPORT_OPEN_OK;
}
}
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return DBUS_TRANSPORT_OPEN_NOT_HANDLED;
}
}
static const struct {
DBusTransportOpenResult (* func) (DBusAddressEntry *entry,
DBusTransport **transport_p,
DBusError *error);
} open_funcs[] = {
{ _dbus_transport_open_socket },
{ _dbus_transport_open_platform_specific },
{ _dbus_transport_open_autolaunch }
#ifdef DBUS_BUILD_TESTS
, { _dbus_transport_open_debug_pipe }
#endif
};
/**
* Try to open a new transport for the given address entry. (This
* opens a client-side-of-the-connection transport.)
*
* @param entry the address entry
* @param error location to store reason for failure.
* @returns new transport of #NULL on failure.
*/
DBusTransport*
_dbus_transport_open (DBusAddressEntry *entry,
DBusError *error)
{
DBusTransport *transport;
const char *expected_guid_orig;
char *expected_guid;
int i;
DBusError tmp_error;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
transport = NULL;
expected_guid_orig = dbus_address_entry_get_value (entry, "guid");
expected_guid = _dbus_strdup (expected_guid_orig);
if (expected_guid_orig != NULL && expected_guid == NULL)
{
_DBUS_SET_OOM (error);
return NULL;
}
dbus_error_init (&tmp_error);
for (i = 0; i < (int) _DBUS_N_ELEMENTS (open_funcs); ++i)
{
DBusTransportOpenResult result;
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
result = (* open_funcs[i].func) (entry, &transport, &tmp_error);
switch (result)
{
case DBUS_TRANSPORT_OPEN_OK:
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
goto out;
break;
case DBUS_TRANSPORT_OPEN_NOT_HANDLED:
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
/* keep going through the loop of open funcs */
break;
case DBUS_TRANSPORT_OPEN_BAD_ADDRESS:
_DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
goto out;
break;
case DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT:
_DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
goto out;
break;
}
}
out:
if (transport == NULL)
{
if (!dbus_error_is_set (&tmp_error))
_dbus_set_bad_address (&tmp_error,
NULL, NULL,
"Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")");
_DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
dbus_move_error(&tmp_error, error);
dbus_free (expected_guid);
}
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
//fix for memory leak for dbus_bus_get in autolaunch mode
#ifdef __SYMBIAN32__
if (transport->expected_guid)
dbus_free(transport->expected_guid);
#endif // __SYMBIAN32__
transport->expected_guid = expected_guid;
}
return transport;
}
/**
* Increments the reference count for the transport.
*
* @param transport the transport.
* @returns the transport.
*/
DBusTransport *
_dbus_transport_ref (DBusTransport *transport)
{
_dbus_assert (transport->refcount > 0);
transport->refcount += 1;
return transport;
}
/**
* Decrements the reference count for the transport.
* Disconnects and finalizes the transport if
* the reference count reaches zero.
*
* @param transport the transport.
*/
void
_dbus_transport_unref (DBusTransport *transport)
{
_dbus_assert (transport != NULL);
_dbus_assert (transport->refcount > 0);
transport->refcount -= 1;
if (transport->refcount == 0)
{
_dbus_verbose ("%s: finalizing\n", _DBUS_FUNCTION_NAME);
_dbus_assert (transport->vtable->finalize != NULL);
(* transport->vtable->finalize) (transport);
}
}
/**
* Closes our end of the connection to a remote application. Further
* attempts to use this transport will fail. Only the first call to
* _dbus_transport_disconnect() will have an effect.
*
* @param transport the transport.
*
*/
void
_dbus_transport_disconnect (DBusTransport *transport)
{
_dbus_verbose ("%s start\n", _DBUS_FUNCTION_NAME);
_dbus_assert (transport->vtable->disconnect != NULL);
if (transport->disconnected)
return;
(* transport->vtable->disconnect) (transport);
transport->disconnected = TRUE;
_dbus_verbose ("%s end\n", _DBUS_FUNCTION_NAME);
}
/**
* Returns #TRUE if the transport has not been disconnected.
* Disconnection can result from _dbus_transport_disconnect()
* or because the server drops its end of the connection.
*
* @param transport the transport.
* @returns whether we're connected
*/
dbus_bool_t
_dbus_transport_get_is_connected (DBusTransport *transport)
{
return !transport->disconnected;
}
/**
* Returns #TRUE if we have been authenticated. Will return #TRUE
* even if the transport is disconnected.
*
* @todo we drop connection->mutex when calling the unix_user_function,
* which may not be safe really.
*
* @param transport the transport
* @returns whether we're authenticated
*/
dbus_bool_t
_dbus_transport_get_is_authenticated (DBusTransport *transport)
{
/* We don't want to run unix_user_function on Windows, but it
* can exist, which allows application code to just unconditionally
* set it and have it only be invoked when appropriate.
*/
dbus_bool_t on_windows = FALSE;
#ifdef DBUS_WIN
on_windows = TRUE;
#endif
if (transport->authenticated)
return TRUE;
else
{
dbus_bool_t maybe_authenticated;
if (transport->disconnected)
return FALSE;
/* paranoia ref since we call user callbacks sometimes */
_dbus_connection_ref_unlocked (transport->connection);
maybe_authenticated =
(!(transport->send_credentials_pending ||
transport->receive_credentials_pending));
if (maybe_authenticated)
{
switch (_dbus_auth_do_work (transport->auth))
{
case DBUS_AUTH_STATE_AUTHENTICATED:
/* leave as maybe_authenticated */
break;
default:
maybe_authenticated = FALSE;
}
}
if (maybe_authenticated && !transport->is_server)
{
const char *server_guid;
server_guid = _dbus_auth_get_guid_from_server (transport->auth);
_dbus_assert (server_guid != NULL);
if (transport->expected_guid &&
strcmp (transport->expected_guid, server_guid) != 0)
{
_dbus_verbose ("Client expected GUID '%s' and we got '%s' from the server\n",
transport->expected_guid, server_guid);
_dbus_transport_disconnect (transport);
_dbus_connection_unref_unlocked (transport->connection);
return FALSE;
}
if (transport->expected_guid == NULL)
{
transport->expected_guid = _dbus_strdup (server_guid);
if (transport->expected_guid == NULL)
{
_dbus_verbose ("No memory to complete auth in %s\n", _DBUS_FUNCTION_NAME);
return FALSE;
}
}
}
/* If we've authenticated as some identity, check that the auth
* identity is the same as our own identity. In the future, we
* may have API allowing applications to specify how this is
* done, for example they may allow connection as any identity,
* but then impose restrictions on certain identities.
* Or they may give certain identities extra privileges.
*/
if (maybe_authenticated && transport->is_server)
{
DBusCredentials auth_identity;
_dbus_auth_get_identity (transport->auth, &auth_identity);
if (transport->unix_user_function != NULL && !on_windows)
{
dbus_bool_t allow;
DBusConnection *connection;
DBusAllowUnixUserFunction unix_user_function;
void *unix_user_data;
/* Dropping the lock here probably isn't that safe. */
connection = transport->connection;
unix_user_function = transport->unix_user_function;
unix_user_data = transport->unix_user_data;
_dbus_verbose ("unlock %s\n", _DBUS_FUNCTION_NAME);
_dbus_connection_unlock (connection);
allow = (* unix_user_function) (connection,
auth_identity.uid,
unix_user_data);
_dbus_verbose ("lock %s post unix user function\n", _DBUS_FUNCTION_NAME);
_dbus_connection_lock (connection);
if (allow)
{
_dbus_verbose ("Client UID "DBUS_UID_FORMAT" authorized\n", auth_identity.uid);
}
else
{
_dbus_verbose ("Client UID "DBUS_UID_FORMAT
" was rejected, disconnecting\n",
auth_identity.uid);
_dbus_transport_disconnect (transport);
_dbus_connection_unref_unlocked (connection);
return FALSE;
}
}
else
{
DBusCredentials our_identity;
_dbus_credentials_from_current_process (&our_identity);
if (!_dbus_credentials_match (&our_identity,
&auth_identity))
{
_dbus_verbose ("Client authorized as UID "DBUS_UID_FORMAT
" but our UID is "DBUS_UID_FORMAT", disconnecting\n",
auth_identity.uid, our_identity.uid);
_dbus_transport_disconnect (transport);
_dbus_connection_unref_unlocked (transport->connection);
return FALSE;
}
else
{
_dbus_verbose ("Client authorized as UID "DBUS_UID_FORMAT
" matching our UID "DBUS_UID_FORMAT"\n",
auth_identity.uid, our_identity.uid);
}
}
}
transport->authenticated = maybe_authenticated;
_dbus_connection_unref_unlocked (transport->connection);
return maybe_authenticated;
}
}
/**
* Gets the address of a transport. It will be
* #NULL for a server-side transport.
*
* @param transport the transport
* @returns transport's address
*/
const char*
_dbus_transport_get_address (DBusTransport *transport)
{
return transport->address;
}
/**
* Handles a watch by reading data, writing data, or disconnecting
* the transport, as appropriate for the given condition.
*
* @param transport the transport.
* @param watch the watch.
* @param condition the current state of the watched file descriptor.
* @returns #FALSE if not enough memory to fully handle the watch
*/
dbus_bool_t
_dbus_transport_handle_watch (DBusTransport *transport,
DBusWatch *watch,
unsigned int condition)
{
dbus_bool_t retval;
_dbus_assert (transport->vtable->handle_watch != NULL);
if (transport->disconnected)
return TRUE;
if (dbus_watch_get_fd (watch) < 0)
{
_dbus_warn_check_failed ("Tried to handle an invalidated watch; this watch should have been removed\n");
return TRUE;
}
_dbus_watch_sanitize_condition (watch, &condition);
_dbus_transport_ref (transport);
_dbus_watch_ref (watch);
retval = (* transport->vtable->handle_watch) (transport, watch, condition);
_dbus_watch_unref (watch);
_dbus_transport_unref (transport);
return retval;
}
/**
* Sets the connection using this transport. Allows the transport
* to add watches to the connection, queue incoming messages,
* and pull outgoing messages.
*
* @param transport the transport.
* @param connection the connection.
* @returns #FALSE if not enough memory
*/
dbus_bool_t
_dbus_transport_set_connection (DBusTransport *transport,
DBusConnection *connection)
{
_dbus_assert (transport->vtable->connection_set != NULL);
_dbus_assert (transport->connection == NULL);
transport->connection = connection;
_dbus_transport_ref (transport);
if (!(* transport->vtable->connection_set) (transport))
transport->connection = NULL;
_dbus_transport_unref (transport);
return transport->connection != NULL;
}
/**
* Get the socket file descriptor, if any.
*
* @param transport the transport
* @param fd_p pointer to fill in with the descriptor
* @returns #TRUE if a descriptor was available
*/
dbus_bool_t
_dbus_transport_get_socket_fd (DBusTransport *transport,
int *fd_p)
{
dbus_bool_t retval;
if (transport->vtable->get_socket_fd == NULL)
return FALSE;
if (transport->disconnected)
return FALSE;
_dbus_transport_ref (transport);
retval = (* transport->vtable->get_socket_fd) (transport,
fd_p);
_dbus_transport_unref (transport);
return retval;
}
/**
* Performs a single poll()/select() on the transport's file
* descriptors and then reads/writes data as appropriate,
* queueing incoming messages and sending outgoing messages.
* This is the backend for _dbus_connection_do_iteration().
* See _dbus_connection_do_iteration() for full details.
*
* @param transport the transport.
* @param flags indicates whether to read or write, and whether to block.
* @param timeout_milliseconds if blocking, timeout or -1 for no timeout.
*/
void
_dbus_transport_do_iteration (DBusTransport *transport,
unsigned int flags,
int timeout_milliseconds)
{
_dbus_assert (transport->vtable->do_iteration != NULL);
_dbus_verbose ("Transport iteration flags 0x%x timeout %d connected = %d\n",
flags, timeout_milliseconds, !transport->disconnected);
if ((flags & (DBUS_ITERATION_DO_WRITING |
DBUS_ITERATION_DO_READING)) == 0)
return; /* Nothing to do */
if (transport->disconnected)
return;
_dbus_transport_ref (transport);
(* transport->vtable->do_iteration) (transport, flags,
timeout_milliseconds);
_dbus_transport_unref (transport);
_dbus_verbose ("%s end\n", _DBUS_FUNCTION_NAME);
}
static dbus_bool_t
recover_unused_bytes (DBusTransport *transport)
{
if (_dbus_auth_needs_decoding (transport->auth))
{
DBusString plaintext;
const DBusString *encoded;
DBusString *buffer;
int orig_len;
if (!_dbus_string_init (&plaintext))
goto nomem;
_dbus_auth_get_unused_bytes (transport->auth,
&encoded);
if (!_dbus_auth_decode_data (transport->auth,
encoded, &plaintext))
{
_dbus_string_free (&plaintext);
goto nomem;
}
_dbus_message_loader_get_buffer (transport->loader,
&buffer);
orig_len = _dbus_string_get_length (buffer);
if (!_dbus_string_move (&plaintext, 0, buffer,
orig_len))
{
_dbus_string_free (&plaintext);
goto nomem;
}
_dbus_verbose (" %d unused bytes sent to message loader\n",
_dbus_string_get_length (buffer) -
orig_len);
_dbus_message_loader_return_buffer (transport->loader,
buffer,
_dbus_string_get_length (buffer) -
orig_len);
_dbus_auth_delete_unused_bytes (transport->auth);
_dbus_string_free (&plaintext);
}
else
{
const DBusString *bytes;
DBusString *buffer;
int orig_len;
dbus_bool_t succeeded;
_dbus_message_loader_get_buffer (transport->loader,
&buffer);
orig_len = _dbus_string_get_length (buffer);
_dbus_auth_get_unused_bytes (transport->auth,
&bytes);
succeeded = TRUE;
if (!_dbus_string_copy (bytes, 0, buffer, _dbus_string_get_length (buffer)))
succeeded = FALSE;
_dbus_verbose (" %d unused bytes sent to message loader\n",
_dbus_string_get_length (buffer) -
orig_len);
_dbus_message_loader_return_buffer (transport->loader,
buffer,
_dbus_string_get_length (buffer) -
orig_len);
if (succeeded)
_dbus_auth_delete_unused_bytes (transport->auth);
else
goto nomem;
}
return TRUE;
nomem:
_dbus_verbose ("Not enough memory to transfer unused bytes from auth conversation\n");
return FALSE;
}
/**
* Reports our current dispatch status (whether there's buffered
* data to be queued as messages, or not, or we need memory).
*
* @param transport the transport
* @returns current status
*/
DBusDispatchStatus
_dbus_transport_get_dispatch_status (DBusTransport *transport)
{
if (_dbus_counter_get_value (transport->live_messages_size) >= transport->max_live_messages_size)
return DBUS_DISPATCH_COMPLETE; /* complete for now */
if (!_dbus_transport_get_is_authenticated (transport))
{
if (_dbus_auth_do_work (transport->auth) ==
DBUS_AUTH_STATE_WAITING_FOR_MEMORY)
return DBUS_DISPATCH_NEED_MEMORY;
else if (!_dbus_transport_get_is_authenticated (transport))
return DBUS_DISPATCH_COMPLETE;
}
if (!transport->unused_bytes_recovered &&
!recover_unused_bytes (transport))
return DBUS_DISPATCH_NEED_MEMORY;
transport->unused_bytes_recovered = TRUE;
if (!_dbus_message_loader_queue_messages (transport->loader))
return DBUS_DISPATCH_NEED_MEMORY;
if (_dbus_message_loader_peek_message (transport->loader) != NULL)
return DBUS_DISPATCH_DATA_REMAINS;
else
return DBUS_DISPATCH_COMPLETE;
}
/**
* Processes data we've read while handling a watch, potentially
* converting some of it to messages and queueing those messages on
* the connection.
*
* @param transport the transport
* @returns #TRUE if we had enough memory to queue all messages
*/
dbus_bool_t
_dbus_transport_queue_messages (DBusTransport *transport)
{
DBusDispatchStatus status;
#if 0
_dbus_verbose ("_dbus_transport_queue_messages()\n");
#endif
/* Queue any messages */
while ((status = _dbus_transport_get_dispatch_status (transport)) == DBUS_DISPATCH_DATA_REMAINS)
{
DBusMessage *message;
DBusList *link;
link = _dbus_message_loader_pop_message_link (transport->loader);
_dbus_assert (link != NULL);
message = link->data;
_dbus_verbose ("queueing received message %p\n", message);
if (!_dbus_message_add_size_counter (message, transport->live_messages_size))
{
_dbus_message_loader_putback_message_link (transport->loader,
link);
status = DBUS_DISPATCH_NEED_MEMORY;
break;
}
else
{
/* pass ownership of link and message ref to connection */
_dbus_connection_queue_received_message_link (transport->connection,
link);
}
}
if (_dbus_message_loader_get_is_corrupted (transport->loader))
{
_dbus_verbose ("Corrupted message stream, disconnecting\n");
_dbus_transport_disconnect (transport);
}
return status != DBUS_DISPATCH_NEED_MEMORY;
}
/**
* See dbus_connection_set_max_message_size().
*
* @param transport the transport
* @param size the max size of a single message
*/
void
_dbus_transport_set_max_message_size (DBusTransport *transport,
long size)
{
_dbus_message_loader_set_max_message_size (transport->loader, size);
}
/**
* See dbus_connection_get_max_message_size().
*
* @param transport the transport
* @returns max message size
*/
long
_dbus_transport_get_max_message_size (DBusTransport *transport)
{
return _dbus_message_loader_get_max_message_size (transport->loader);
}
/**
* See dbus_connection_set_max_received_size().
*
* @param transport the transport
* @param size the max size of all incoming messages
*/
void
_dbus_transport_set_max_received_size (DBusTransport *transport,
long size)
{
transport->max_live_messages_size = size;
_dbus_counter_set_notify (transport->live_messages_size,
transport->max_live_messages_size,
live_messages_size_notify,
transport);
}
/**
* See dbus_connection_get_max_received_size().
*
* @param transport the transport
* @returns max bytes for all live messages
*/
long
_dbus_transport_get_max_received_size (DBusTransport *transport)
{
return transport->max_live_messages_size;
}
/**
* See dbus_connection_get_unix_user().
*
* @param transport the transport
* @param uid return location for the user ID
* @returns #TRUE if uid is filled in with a valid user ID
*/
dbus_bool_t
_dbus_transport_get_unix_user (DBusTransport *transport,
unsigned long *uid)
{
DBusCredentials auth_identity;
*uid = _DBUS_INT32_MAX; /* better than some root or system user in
* case of bugs in the caller. Caller should
* never use this value on purpose, however.
*/
if (!transport->authenticated)
return FALSE;
_dbus_auth_get_identity (transport->auth, &auth_identity);
if (auth_identity.uid != DBUS_UID_UNSET)
{
*uid = auth_identity.uid;
return TRUE;
}
else
return FALSE;
}
/**
* See dbus_connection_get_unix_process_id().
*
* @param transport the transport
* @param pid return location for the process ID
* @returns #TRUE if uid is filled in with a valid process ID
*/
dbus_bool_t
_dbus_transport_get_unix_process_id (DBusTransport *transport,
unsigned long *pid)
{
DBusCredentials auth_identity;
*pid = DBUS_PID_UNSET; /* Caller should never use this value on purpose,
* but we set it to a safe number, INT_MAX,
* just to root out possible bugs in bad callers.
*/
if (!transport->authenticated)
return FALSE;
_dbus_auth_get_identity (transport->auth, &auth_identity);
if (auth_identity.pid != DBUS_PID_UNSET)
{
*pid = auth_identity.pid;
return TRUE;
}
else
return FALSE;
}
/**
* See dbus_connection_set_unix_user_function().
*
* @param transport the transport
* @param function the predicate
* @param data data to pass to the predicate
* @param free_data_function function to free the data
* @param old_data the old user data to be freed
* @param old_free_data_function old free data function to free it with
*/
void
_dbus_transport_set_unix_user_function (DBusTransport *transport,
DBusAllowUnixUserFunction function,
void *data,
DBusFreeFunction free_data_function,
void **old_data,
DBusFreeFunction *old_free_data_function)
{
*old_data = transport->unix_user_data;
*old_free_data_function = transport->free_unix_user_data;
transport->unix_user_function = function;
transport->unix_user_data = data;
transport->free_unix_user_data = free_data_function;
}
/**
* Sets the SASL authentication mechanisms supported by this transport.
*
* @param transport the transport
* @param mechanisms the #NULL-terminated array of mechanisms
*
* @returns #FALSE if no memory
*/
dbus_bool_t
_dbus_transport_set_auth_mechanisms (DBusTransport *transport,
const char **mechanisms)
{
return _dbus_auth_set_mechanisms (transport->auth, mechanisms);
}
/** @} */