-/* -*- mode: C; c-file-style: "gnu" -*- */
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* dbus-transport-unix.c UNIX socket subclasses of DBusTransport
*
- * Copyright (C) 2002, 2003 Red Hat Inc.
+ * Copyright (C) 2002, 2003, 2004 Red Hat Inc.
*
* Licensed under the Academic Free License version 2.1
*
*
* 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+#include <config.h>
#include "dbus-internals.h"
#include "dbus-connection-internal.h"
#include "dbus-transport-unix.h"
+#include "dbus-transport-socket.h"
#include "dbus-transport-protected.h"
#include "dbus-watch.h"
-
+#include "dbus-sysdeps-unix.h"
/**
* @defgroup DBusTransportUnix DBusTransport implementations for UNIX
*/
/**
- * Opaque object representing a Unix file descriptor transport.
- */
-typedef struct DBusTransportUnix DBusTransportUnix;
-
-/**
- * Implementation details of DBusTransportUnix. All members are private.
- */
-struct DBusTransportUnix
-{
- DBusTransport base; /**< Parent instance */
- int fd; /**< File descriptor. */
- DBusWatch *read_watch; /**< Watch for readability. */
- DBusWatch *write_watch; /**< Watch for writability. */
-
- int max_bytes_read_per_iteration; /**< To avoid blocking too long. */
- int max_bytes_written_per_iteration; /**< To avoid blocking too long. */
-
- int message_bytes_written; /**< Number of bytes of current
- * outgoing message that have
- * been written.
- */
- DBusString encoded_outgoing; /**< Encoded version of current
- * outgoing message.
- */
- DBusString encoded_incoming; /**< Encoded version of current
- * incoming data.
- */
-};
-
-static void
-free_watches (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
-
- if (unix_transport->read_watch)
- {
- if (transport->connection)
- _dbus_connection_remove_watch (transport->connection,
- unix_transport->read_watch);
- _dbus_watch_invalidate (unix_transport->read_watch);
- _dbus_watch_unref (unix_transport->read_watch);
- unix_transport->read_watch = NULL;
- }
-
- if (unix_transport->write_watch)
- {
- if (transport->connection)
- _dbus_connection_remove_watch (transport->connection,
- unix_transport->write_watch);
- _dbus_watch_invalidate (unix_transport->write_watch);
- _dbus_watch_unref (unix_transport->write_watch);
- unix_transport->write_watch = NULL;
- }
-}
-
-static void
-unix_finalize (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
-
- free_watches (transport);
-
- _dbus_string_free (&unix_transport->encoded_outgoing);
- _dbus_string_free (&unix_transport->encoded_incoming);
-
- _dbus_transport_finalize_base (transport);
-
- _dbus_assert (unix_transport->read_watch == NULL);
- _dbus_assert (unix_transport->write_watch == NULL);
-
- dbus_free (transport);
-}
-
-static void
-check_write_watch (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
- dbus_bool_t need_write_watch;
-
- if (transport->connection == NULL)
- return;
-
- if (transport->disconnected)
- {
- _dbus_assert (unix_transport->write_watch == NULL);
- return;
- }
-
- _dbus_transport_ref (transport);
-
- if (_dbus_transport_get_is_authenticated (transport))
- need_write_watch = transport->messages_need_sending;
- else
- need_write_watch = transport->send_credentials_pending ||
- _dbus_auth_do_work (transport->auth) == DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND;
-
- _dbus_connection_toggle_watch (transport->connection,
- unix_transport->write_watch,
- need_write_watch);
-
- _dbus_transport_unref (transport);
-}
-
-static void
-check_read_watch (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
- dbus_bool_t need_read_watch;
-
- if (transport->connection == NULL)
- return;
-
- if (transport->disconnected)
- {
- _dbus_assert (unix_transport->read_watch == NULL);
- return;
- }
-
- _dbus_transport_ref (transport);
-
- if (_dbus_transport_get_is_authenticated (transport))
- need_read_watch =
- _dbus_counter_get_value (transport->live_messages_size) < transport->max_live_messages_size;
- else
- need_read_watch = transport->receive_credentials_pending ||
- _dbus_auth_do_work (transport->auth) == DBUS_AUTH_STATE_WAITING_FOR_INPUT;
-
- _dbus_connection_toggle_watch (transport->connection,
- unix_transport->read_watch,
- need_read_watch);
-
- _dbus_transport_unref (transport);
-}
-
-static void
-do_io_error (DBusTransport *transport)
-{
- _dbus_transport_ref (transport);
- _dbus_transport_disconnect (transport);
- _dbus_transport_unref (transport);
-}
-
-/* return value is whether we successfully read any new data. */
-static dbus_bool_t
-read_data_into_auth (DBusTransport *transport,
- dbus_bool_t *oom)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
- DBusString *buffer;
- int bytes_read;
-
- *oom = FALSE;
-
- _dbus_auth_get_buffer (transport->auth, &buffer);
-
- bytes_read = _dbus_read (unix_transport->fd,
- buffer, unix_transport->max_bytes_read_per_iteration);
-
- _dbus_auth_return_buffer (transport->auth, buffer,
- bytes_read > 0 ? bytes_read : 0);
-
- if (bytes_read > 0)
- {
- _dbus_verbose (" read %d bytes in auth phase\n", bytes_read);
-
- return TRUE;
- }
- else if (bytes_read < 0)
- {
- /* EINTR already handled for us */
-
- if (errno == ENOMEM)
- {
- *oom = TRUE;
- }
- else if (errno == EAGAIN ||
- errno == EWOULDBLOCK)
- ; /* do nothing, just return FALSE below */
- else
- {
- _dbus_verbose ("Error reading from remote app: %s\n",
- _dbus_strerror (errno));
- do_io_error (transport);
- }
-
- return FALSE;
- }
- else
- {
- _dbus_assert (bytes_read == 0);
-
- _dbus_verbose ("Disconnected from remote app\n");
- do_io_error (transport);
-
- return FALSE;
- }
-}
-
-/* Return value is whether we successfully wrote any bytes */
-static dbus_bool_t
-write_data_from_auth (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
- int bytes_written;
- const DBusString *buffer;
-
- if (!_dbus_auth_get_bytes_to_send (transport->auth,
- &buffer))
- return FALSE;
-
- bytes_written = _dbus_write (unix_transport->fd,
- buffer,
- 0, _dbus_string_get_length (buffer));
-
- if (bytes_written > 0)
- {
- _dbus_auth_bytes_sent (transport->auth, bytes_written);
- return TRUE;
- }
- else if (bytes_written < 0)
- {
- /* EINTR already handled for us */
-
- if (errno == EAGAIN ||
- errno == EWOULDBLOCK)
- ;
- else
- {
- _dbus_verbose ("Error writing to remote app: %s\n",
- _dbus_strerror (errno));
- do_io_error (transport);
- }
- }
-
- return FALSE;
-}
-
-static void
-exchange_credentials (DBusTransport *transport,
- dbus_bool_t do_reading,
- dbus_bool_t do_writing)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
-
- if (do_writing && transport->send_credentials_pending)
- {
- if (_dbus_send_credentials_unix_socket (unix_transport->fd,
- NULL))
- {
- transport->send_credentials_pending = FALSE;
- }
- else
- {
- _dbus_verbose ("Failed to write credentials\n");
- do_io_error (transport);
- }
- }
-
- if (do_reading && transport->receive_credentials_pending)
- {
- if (_dbus_read_credentials_unix_socket (unix_transport->fd,
- &transport->credentials,
- NULL))
- {
- transport->receive_credentials_pending = FALSE;
- }
- else
- {
- _dbus_verbose ("Failed to read credentials\n");
- do_io_error (transport);
- }
- }
-
- if (!(transport->send_credentials_pending ||
- transport->receive_credentials_pending))
- {
- _dbus_auth_set_credentials (transport->auth,
- &transport->credentials);
- }
-}
-
-static dbus_bool_t
-do_authentication (DBusTransport *transport,
- dbus_bool_t do_reading,
- dbus_bool_t do_writing)
-{
- dbus_bool_t oom;
-
- _dbus_transport_ref (transport);
-
- oom = FALSE;
-
- while (!_dbus_transport_get_is_authenticated (transport) &&
- _dbus_transport_get_is_connected (transport))
- {
- exchange_credentials (transport, do_reading, do_writing);
-
- if (transport->send_credentials_pending ||
- transport->receive_credentials_pending)
- {
- _dbus_verbose ("send_credentials_pending = %d receive_credentials_pending = %d\n",
- transport->send_credentials_pending,
- transport->receive_credentials_pending);
- goto out;
- }
-
-#define TRANSPORT_SIDE(t) ((t)->is_server ? "server" : "client")
- switch (_dbus_auth_do_work (transport->auth))
- {
- case DBUS_AUTH_STATE_WAITING_FOR_INPUT:
- _dbus_verbose (" %s auth state: waiting for input\n",
- TRANSPORT_SIDE (transport));
- if (!do_reading || !read_data_into_auth (transport, &oom))
- goto out;
- break;
-
- case DBUS_AUTH_STATE_WAITING_FOR_MEMORY:
- _dbus_verbose (" %s auth state: waiting for memory\n",
- TRANSPORT_SIDE (transport));
- oom = TRUE;
- goto out;
- break;
-
- case DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND:
- _dbus_verbose (" %s auth state: bytes to send\n",
- TRANSPORT_SIDE (transport));
- if (!do_writing || !write_data_from_auth (transport))
- goto out;
- break;
-
- case DBUS_AUTH_STATE_NEED_DISCONNECT:
- _dbus_verbose (" %s auth state: need to disconnect\n",
- TRANSPORT_SIDE (transport));
- do_io_error (transport);
- break;
-
- case DBUS_AUTH_STATE_AUTHENTICATED:
- _dbus_verbose (" %s auth state: authenticated\n",
- TRANSPORT_SIDE (transport));
- break;
- }
- }
-
- out:
- check_read_watch (transport);
- check_write_watch (transport);
- _dbus_transport_unref (transport);
-
- if (oom)
- return FALSE;
- else
- return TRUE;
-}
-
-/* returns false on oom */
-static dbus_bool_t
-do_writing (DBusTransport *transport)
-{
- int total;
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
- dbus_bool_t oom;
-
- /* No messages without authentication! */
- if (!_dbus_transport_get_is_authenticated (transport))
- {
- _dbus_verbose ("Not authenticated, not writing anything\n");
- return TRUE;
- }
-
- if (transport->disconnected)
- {
- _dbus_verbose ("Not connected, not writing anything\n");
- return TRUE;
- }
-
-#if 0
- _dbus_verbose ("do_writing(), have_messages = %d\n",
- _dbus_connection_have_messages_to_send (transport->connection));
-#endif
-
- oom = FALSE;
- total = 0;
-
- while (!transport->disconnected &&
- _dbus_connection_have_messages_to_send (transport->connection))
- {
- int bytes_written;
- DBusMessage *message;
- const DBusString *header;
- const DBusString *body;
- int header_len, body_len;
- int total_bytes_to_write;
-
- if (total > unix_transport->max_bytes_written_per_iteration)
- {
- _dbus_verbose ("%d bytes exceeds %d bytes written per iteration, returning\n",
- total, unix_transport->max_bytes_written_per_iteration);
- goto out;
- }
-
- if (!dbus_watch_get_enabled (unix_transport->write_watch))
- {
- _dbus_verbose ("write watch disabled, not writing more stuff\n");
- goto out;
- }
-
- message = _dbus_connection_get_message_to_send (transport->connection);
- _dbus_assert (message != NULL);
- _dbus_message_lock (message);
-
-#if 0
- _dbus_verbose ("writing message %p\n", message);
-#endif
-
- _dbus_message_get_network_data (message,
- &header, &body);
-
- header_len = _dbus_string_get_length (header);
- body_len = _dbus_string_get_length (body);
-
- if (_dbus_auth_needs_encoding (transport->auth))
- {
- if (_dbus_string_get_length (&unix_transport->encoded_outgoing) == 0)
- {
- if (!_dbus_auth_encode_data (transport->auth,
- header, &unix_transport->encoded_outgoing))
- {
- oom = TRUE;
- goto out;
- }
-
- if (!_dbus_auth_encode_data (transport->auth,
- body, &unix_transport->encoded_outgoing))
- {
- _dbus_string_set_length (&unix_transport->encoded_outgoing, 0);
- oom = TRUE;
- goto out;
- }
- }
-
- total_bytes_to_write = _dbus_string_get_length (&unix_transport->encoded_outgoing);
-
-#if 0
- _dbus_verbose ("encoded message is %d bytes\n",
- total_bytes_to_write);
-#endif
-
- bytes_written =
- _dbus_write (unix_transport->fd,
- &unix_transport->encoded_outgoing,
- unix_transport->message_bytes_written,
- total_bytes_to_write - unix_transport->message_bytes_written);
- }
- else
- {
- total_bytes_to_write = header_len + body_len;
-
-#if 0
- _dbus_verbose ("message is %d bytes\n",
- total_bytes_to_write);
-#endif
-
- if (unix_transport->message_bytes_written < header_len)
- {
- bytes_written =
- _dbus_write_two (unix_transport->fd,
- header,
- unix_transport->message_bytes_written,
- header_len - unix_transport->message_bytes_written,
- body,
- 0, body_len);
- }
- else
- {
- bytes_written =
- _dbus_write (unix_transport->fd,
- body,
- (unix_transport->message_bytes_written - header_len),
- body_len -
- (unix_transport->message_bytes_written - header_len));
- }
- }
-
- if (bytes_written < 0)
- {
- /* EINTR already handled for us */
-
- if (errno == EAGAIN ||
- errno == EWOULDBLOCK)
- goto out;
- else
- {
- _dbus_verbose ("Error writing to remote app: %s\n",
- _dbus_strerror (errno));
- do_io_error (transport);
- goto out;
- }
- }
- else
- {
- _dbus_verbose (" wrote %d bytes of %d\n", bytes_written,
- total_bytes_to_write);
-
- total += bytes_written;
- unix_transport->message_bytes_written += bytes_written;
-
- _dbus_assert (unix_transport->message_bytes_written <=
- total_bytes_to_write);
-
- if (unix_transport->message_bytes_written == total_bytes_to_write)
- {
- unix_transport->message_bytes_written = 0;
- _dbus_string_set_length (&unix_transport->encoded_outgoing, 0);
-
- _dbus_connection_message_sent (transport->connection,
- message);
- }
- }
- }
-
- out:
- if (oom)
- return FALSE;
- else
- return TRUE;
-}
-
-/* returns false on out-of-memory */
-static dbus_bool_t
-do_reading (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
- DBusString *buffer;
- int bytes_read;
- int total;
- dbus_bool_t oom;
-
- /* No messages without authentication! */
- if (!_dbus_transport_get_is_authenticated (transport))
- return TRUE;
-
- oom = FALSE;
-
- total = 0;
-
- again:
-
- /* See if we've exceeded max messages and need to disable reading */
- check_read_watch (transport);
-
- if (total > unix_transport->max_bytes_read_per_iteration)
- {
- _dbus_verbose ("%d bytes exceeds %d bytes read per iteration, returning\n",
- total, unix_transport->max_bytes_read_per_iteration);
- goto out;
- }
-
- _dbus_assert (unix_transport->read_watch != NULL ||
- transport->disconnected);
-
- if (transport->disconnected)
- goto out;
-
- if (!dbus_watch_get_enabled (unix_transport->read_watch))
- return TRUE;
-
- if (_dbus_auth_needs_decoding (transport->auth))
- {
- if (_dbus_string_get_length (&unix_transport->encoded_incoming) > 0)
- bytes_read = _dbus_string_get_length (&unix_transport->encoded_incoming);
- else
- bytes_read = _dbus_read (unix_transport->fd,
- &unix_transport->encoded_incoming,
- unix_transport->max_bytes_read_per_iteration);
-
- _dbus_assert (_dbus_string_get_length (&unix_transport->encoded_incoming) ==
- bytes_read);
-
- if (bytes_read > 0)
- {
- int orig_len;
-
- _dbus_message_loader_get_buffer (transport->loader,
- &buffer);
-
- orig_len = _dbus_string_get_length (buffer);
-
- if (!_dbus_auth_decode_data (transport->auth,
- &unix_transport->encoded_incoming,
- buffer))
- {
- _dbus_verbose ("Out of memory decoding incoming data\n");
- oom = TRUE;
- goto out;
- }
-
- _dbus_message_loader_return_buffer (transport->loader,
- buffer,
- _dbus_string_get_length (buffer) - orig_len);
-
- _dbus_string_set_length (&unix_transport->encoded_incoming, 0);
- }
- }
- else
- {
- _dbus_message_loader_get_buffer (transport->loader,
- &buffer);
-
- bytes_read = _dbus_read (unix_transport->fd,
- buffer, unix_transport->max_bytes_read_per_iteration);
-
- _dbus_message_loader_return_buffer (transport->loader,
- buffer,
- bytes_read < 0 ? 0 : bytes_read);
- }
-
- if (bytes_read < 0)
- {
- /* EINTR already handled for us */
-
- if (errno == ENOMEM)
- {
- _dbus_verbose ("Out of memory in read()/do_reading()\n");
- oom = TRUE;
- goto out;
- }
- else if (errno == EAGAIN ||
- errno == EWOULDBLOCK)
- goto out;
- else
- {
- _dbus_verbose ("Error reading from remote app: %s\n",
- _dbus_strerror (errno));
- do_io_error (transport);
- goto out;
- }
- }
- else if (bytes_read == 0)
- {
- _dbus_verbose ("Disconnected from remote app\n");
- do_io_error (transport);
- goto out;
- }
- else
- {
- _dbus_verbose (" read %d bytes\n", bytes_read);
-
- total += bytes_read;
-
- if (!_dbus_transport_queue_messages (transport))
- {
- oom = TRUE;
- _dbus_verbose (" out of memory when queueing messages we just read in the transport\n");
- goto out;
- }
-
- /* Try reading more data until we get EAGAIN and return, or
- * exceed max bytes per iteration. If in blocking mode of
- * course we'll block instead of returning.
- */
- goto again;
- }
-
- out:
- if (oom)
- return FALSE;
- else
- return TRUE;
-}
-
-static dbus_bool_t
-unix_handle_watch (DBusTransport *transport,
- DBusWatch *watch,
- unsigned int flags)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
-
- _dbus_assert (watch == unix_transport->read_watch ||
- watch == unix_transport->write_watch);
-
- /* Disconnect in case of an error. In case of hangup do not
- * disconnect the transport because data can still be in the buffer
- * and do_reading may need several iteration to read it all (because
- * of its max_bytes_read_per_iteration limit). The condition where
- * flags == HANGUP (without READABLE) probably never happen in fact.
- */
- if ((flags & DBUS_WATCH_ERROR) ||
- ((flags & DBUS_WATCH_HANGUP) && !(flags & DBUS_WATCH_READABLE)))
- {
- _dbus_verbose ("Hang up or error on watch\n");
- _dbus_transport_disconnect (transport);
- return TRUE;
- }
-
- if (watch == unix_transport->read_watch &&
- (flags & DBUS_WATCH_READABLE))
- {
-#if 0
- _dbus_verbose ("handling read watch (%x)\n", flags);
-#endif
- if (!do_authentication (transport, TRUE, FALSE))
- return FALSE;
-
- if (!do_reading (transport))
- {
- _dbus_verbose ("no memory to read\n");
- return FALSE;
- }
- }
- else if (watch == unix_transport->write_watch &&
- (flags & DBUS_WATCH_WRITABLE))
- {
-#if 0
- _dbus_verbose ("handling write watch, messages_need_sending = %d\n",
- transport->messages_need_sending);
-#endif
- if (!do_authentication (transport, FALSE, TRUE))
- return FALSE;
-
- if (!do_writing (transport))
- {
- _dbus_verbose ("no memory to write\n");
- return FALSE;
- }
- }
-#ifdef DBUS_ENABLE_VERBOSE_MODE
- else
- {
- if (watch == unix_transport->read_watch)
- _dbus_verbose ("asked to handle read watch with non-read condition 0x%x\n",
- flags);
- else if (watch == unix_transport->write_watch)
- _dbus_verbose ("asked to handle write watch with non-write condition 0x%x\n",
- flags);
- else
- _dbus_verbose ("asked to handle watch %p on fd %d that we don't recognize\n",
- watch, dbus_watch_get_fd (watch));
- }
-#endif /* DBUS_ENABLE_VERBOSE_MODE */
-
- return TRUE;
-}
-
-static void
-unix_disconnect (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
-
- free_watches (transport);
-
- _dbus_close (unix_transport->fd, NULL);
- unix_transport->fd = -1;
-}
-
-static dbus_bool_t
-unix_connection_set (DBusTransport *transport)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
-
- _dbus_watch_set_handler (unix_transport->write_watch,
- _dbus_connection_handle_watch,
- transport->connection, NULL);
-
- _dbus_watch_set_handler (unix_transport->read_watch,
- _dbus_connection_handle_watch,
- transport->connection, NULL);
-
- if (!_dbus_connection_add_watch (transport->connection,
- unix_transport->write_watch))
- return FALSE;
-
- if (!_dbus_connection_add_watch (transport->connection,
- unix_transport->read_watch))
- {
- _dbus_connection_remove_watch (transport->connection,
- unix_transport->write_watch);
- return FALSE;
- }
-
- check_read_watch (transport);
- check_write_watch (transport);
-
- return TRUE;
-}
-
-static void
-unix_messages_pending (DBusTransport *transport,
- int messages_pending)
-{
- check_write_watch (transport);
-}
-
-/**
- * @todo We need to have a way to wake up the select sleep if
- * a new iteration request comes in with a flag (read/write) that
- * we're not currently serving. Otherwise a call that just reads
- * could block a write call forever (if there are no incoming
- * messages).
- */
-static void
-unix_do_iteration (DBusTransport *transport,
- unsigned int flags,
- int timeout_milliseconds)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
- DBusPollFD poll_fd;
- int poll_res;
- int poll_timeout;
-
- _dbus_verbose (" iteration flags = %s%s timeout = %d read_watch = %p write_watch = %p\n",
- flags & DBUS_ITERATION_DO_READING ? "read" : "",
- flags & DBUS_ITERATION_DO_WRITING ? "write" : "",
- timeout_milliseconds,
- unix_transport->read_watch,
- unix_transport->write_watch);
-
- /* the passed in DO_READING/DO_WRITING flags indicate whether to
- * read/write messages, but regardless of those we may need to block
- * for reading/writing to do auth. But if we do reading for auth,
- * we don't want to read any messages yet if not given DO_READING.
- *
- * Also, if read_watch == NULL or write_watch == NULL, we don't
- * want to read/write so don't.
- */
-
- poll_fd.fd = unix_transport->fd;
- poll_fd.events = 0;
-
- if (_dbus_transport_get_is_authenticated (transport))
- {
- if (unix_transport->read_watch &&
- (flags & DBUS_ITERATION_DO_READING))
- poll_fd.events |= _DBUS_POLLIN;
-
- if (unix_transport->write_watch &&
- (flags & DBUS_ITERATION_DO_WRITING))
- poll_fd.events |= _DBUS_POLLOUT;
- }
- else
- {
- DBusAuthState auth_state;
-
- auth_state = _dbus_auth_do_work (transport->auth);
-
- if (transport->receive_credentials_pending ||
- auth_state == DBUS_AUTH_STATE_WAITING_FOR_INPUT)
- poll_fd.events |= _DBUS_POLLIN;
-
- if (transport->send_credentials_pending ||
- auth_state == DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND)
- poll_fd.events |= _DBUS_POLLOUT;
- }
-
- if (poll_fd.events)
- {
- if (flags & DBUS_ITERATION_BLOCK)
- poll_timeout = timeout_milliseconds;
- else
- poll_timeout = 0;
-
- /* For blocking selects we drop the connection lock here
- * to avoid blocking out connection access during a potentially
- * indefinite blocking call. The io path is still protected
- * by the io_path_cond condvar, so we won't reenter this.
- */
- if (flags & DBUS_ITERATION_BLOCK)
- _dbus_connection_unlock (transport->connection);
-
- again:
- poll_res = _dbus_poll (&poll_fd, 1, poll_timeout);
-
- if (poll_res < 0 && errno == EINTR)
- goto again;
-
- if (flags & DBUS_ITERATION_BLOCK)
- _dbus_connection_lock (transport->connection);
-
- if (poll_res >= 0)
- {
- if (poll_fd.revents & _DBUS_POLLERR)
- do_io_error (transport);
- else
- {
- dbus_bool_t need_read = (poll_fd.revents & _DBUS_POLLIN) > 0;
- dbus_bool_t need_write = (poll_fd.revents & _DBUS_POLLOUT) > 0;
-
- _dbus_verbose ("in iteration, need_read=%d need_write=%d\n",
- need_read, need_write);
- do_authentication (transport, need_read, need_write);
-
- if (need_read && (flags & DBUS_ITERATION_DO_READING))
- do_reading (transport);
- if (need_write && (flags & DBUS_ITERATION_DO_WRITING))
- do_writing (transport);
- }
- }
- else
- {
- _dbus_verbose ("Error from _dbus_poll(): %s\n",
- _dbus_strerror (errno));
- }
- }
-}
-
-static void
-unix_live_messages_changed (DBusTransport *transport)
-{
- /* See if we should look for incoming messages again */
- check_read_watch (transport);
-}
-
-
-static dbus_bool_t
-unix_get_unix_fd (DBusTransport *transport,
- int *fd_p)
-{
- DBusTransportUnix *unix_transport = (DBusTransportUnix*) transport;
-
- *fd_p = unix_transport->fd;
-
- return TRUE;
-}
-
-static DBusTransportVTable unix_vtable = {
- unix_finalize,
- unix_handle_watch,
- unix_disconnect,
- unix_connection_set,
- unix_messages_pending,
- unix_do_iteration,
- unix_live_messages_changed,
- unix_get_unix_fd
-};
-
-/**
- * Creates a new transport for the given file descriptor. The file
- * descriptor must be nonblocking (use _dbus_set_fd_nonblocking() to
- * make it so). This function is shared by various transports that
- * boil down to a full duplex file descriptor.
- *
- * @param fd the file descriptor.
- * @param server #TRUE if this transport is on the server side of a connection
- * @param address the transport's address
- * @returns the new transport, or #NULL if no memory.
- */
-DBusTransport*
-_dbus_transport_new_for_fd (int fd,
- dbus_bool_t server,
- const DBusString *address)
-{
- DBusTransportUnix *unix_transport;
-
- unix_transport = dbus_new0 (DBusTransportUnix, 1);
- if (unix_transport == NULL)
- return NULL;
-
- if (!_dbus_string_init (&unix_transport->encoded_outgoing))
- goto failed_0;
-
- if (!_dbus_string_init (&unix_transport->encoded_incoming))
- goto failed_1;
-
- unix_transport->write_watch = _dbus_watch_new (fd,
- DBUS_WATCH_WRITABLE,
- FALSE,
- NULL, NULL, NULL);
- if (unix_transport->write_watch == NULL)
- goto failed_2;
-
- unix_transport->read_watch = _dbus_watch_new (fd,
- DBUS_WATCH_READABLE,
- FALSE,
- NULL, NULL, NULL);
- if (unix_transport->read_watch == NULL)
- goto failed_3;
-
- if (!_dbus_transport_init_base (&unix_transport->base,
- &unix_vtable,
- server, address))
- goto failed_4;
-
- unix_transport->fd = fd;
- unix_transport->message_bytes_written = 0;
-
- /* These values should probably be tunable or something. */
- unix_transport->max_bytes_read_per_iteration = 2048;
- unix_transport->max_bytes_written_per_iteration = 2048;
-
- return (DBusTransport*) unix_transport;
-
- failed_4:
- _dbus_watch_unref (unix_transport->read_watch);
- failed_3:
- _dbus_watch_unref (unix_transport->write_watch);
- failed_2:
- _dbus_string_free (&unix_transport->encoded_incoming);
- failed_1:
- _dbus_string_free (&unix_transport->encoded_outgoing);
- failed_0:
- dbus_free (unix_transport);
- return NULL;
-}
-
-/**
* Creates a new transport for the given Unix domain socket
* path. This creates a client-side of a transport.
*
goto failed_0;
}
- _dbus_fd_set_close_on_exec (fd);
-
_dbus_verbose ("Successfully connected to unix socket %s\n",
path);
- transport = _dbus_transport_new_for_fd (fd, FALSE, &address);
+ transport = _dbus_transport_new_for_socket (fd, NULL, &address);
if (transport == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return transport;
failed_1:
- _dbus_close (fd, NULL);
+ _dbus_close_socket (fd, NULL);
failed_0:
_dbus_string_free (&address);
return NULL;
}
/**
- * Creates a new transport for the given hostname and port.
- *
- * @param host the host to connect to
- * @param port the port to connect to
- * @param error location to store reason for failure.
- * @returns a new transport, or #NULL on failure.
+ * Opens platform specific transport types.
+ *
+ * @param entry the address entry to try opening
+ * @param transport_p return location for the opened transport
+ * @param error error to be set
+ * @returns result of the attempt
*/
-DBusTransport*
-_dbus_transport_new_for_tcp_socket (const char *host,
- dbus_int32_t port,
- DBusError *error)
+DBusTransportOpenResult
+_dbus_transport_open_platform_specific (DBusAddressEntry *entry,
+ DBusTransport **transport_p,
+ DBusError *error)
{
- int fd;
- DBusTransport *transport;
- DBusString address;
+ const char *method;
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+ method = dbus_address_entry_get_method (entry);
+ _dbus_assert (method != NULL);
- if (!_dbus_string_init (&address))
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- return NULL;
- }
-
- if (!_dbus_string_append (&address, "tcp:host=") ||
- !_dbus_string_append (&address, host) ||
- !_dbus_string_append (&address, ",port=") ||
- !_dbus_string_append_int (&address, port))
+ if (strcmp (method, "unix") == 0)
{
- _dbus_string_free (&address);
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- return NULL;
- }
-
- fd = _dbus_connect_tcp_socket (host, port, error);
- if (fd < 0)
- {
- _DBUS_ASSERT_ERROR_IS_SET (error);
- _dbus_string_free (&address);
- return NULL;
- }
+ const char *path = dbus_address_entry_get_value (entry, "path");
+ const char *tmpdir = dbus_address_entry_get_value (entry, "tmpdir");
+ const char *abstract = dbus_address_entry_get_value (entry, "abstract");
+
+ if (tmpdir != NULL)
+ {
+ _dbus_set_bad_address (error, NULL, NULL,
+ "cannot use the \"tmpdir\" option for an address to connect to, only in an address to listen on");
+ return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
+ }
+
+ if (path == NULL && abstract == NULL)
+ {
+ _dbus_set_bad_address (error, "unix",
+ "path or abstract",
+ NULL);
+ return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
+ }
- _dbus_fd_set_close_on_exec (fd);
-
- _dbus_verbose ("Successfully connected to tcp socket %s:%d\n",
- host, port);
-
- transport = _dbus_transport_new_for_fd (fd, FALSE, &address);
- if (transport == NULL)
+ if (path != NULL && abstract != NULL)
+ {
+ _dbus_set_bad_address (error, NULL, NULL,
+ "can't specify both \"path\" and \"abstract\" options in an address");
+ return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
+ }
+
+ if (path)
+ *transport_p = _dbus_transport_new_for_domain_socket (path, FALSE,
+ error);
+ else
+ *transport_p = _dbus_transport_new_for_domain_socket (abstract, TRUE,
+ 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_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- _dbus_close (fd, NULL);
- _dbus_string_free (&address);
- fd = -1;
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+ return DBUS_TRANSPORT_OPEN_NOT_HANDLED;
}
-
- _dbus_string_free (&address);
-
- return transport;
}
/** @} */
-
projects / platform / upstream / dbus.git / blobdiff