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* 2005-02-26 Havoc Pennington <hp@redhat.com>Havoc Pennington2005-02-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * doc/TODO: remove the "guid" item * test/glib/test-profile.c (no_bus_thread_func): use open_private (with_bus_thread_func): use open_private * dbus/dbus-connection.c (dbus_connection_open_private): new function that works like the old dbus_connection_open() (dbus_connection_open): now returns an existing connection if possible * dbus/dbus-server-unix.c (handle_new_client_fd_and_unlock): pass through the GUID to the transport * dbus/dbus-server.c (_dbus_server_init_base): keep around the GUID in hex-encoded form. * dbus/dbus-server-debug-pipe.c (_dbus_transport_debug_pipe_new): pass GUID argument in to the transport * dbus/dbus-transport-unix.c (_dbus_transport_new_for_fd): add guid argument * dbus/dbus-transport.c (_dbus_transport_init_base): add guid argument * dbus/dbus-auth.c (_dbus_auth_server_new): add guid argument
* 2005-02-24 Havoc Pennington <hp@redhat.com>Havoc Pennington2005-02-241-8/+21
| | | | | | | | | | | | | | * dbus/dbus-server.c, dbus/dbus-server-unix.c: change semantics so you must disconnect before unref, since locking and other things are screwed up otherwise. Fix assorted other locking stuff. * dbus/dbus-signature.c (dbus_signature_iter_get_element_type): fix compilation * dbus/dbus-threads-internal.h: move the mutex/condvar wrappers into a private header and don't export from the library * throughout - call _dbus_thread_stuff vs. dbus_thread_stuff
* 2005-02-13 Havoc Pennington <hp@redhat.com>Havoc Pennington2005-02-131-13/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * dbus/dbus-object-tree.c (handle_default_introspect_and_unlock): fix a double-unlock * dbus/dbus-connection.c (_dbus_connection_detach_pending_call_unlocked): add this Initial semi-correct pass through to fix thread locking; there are still some issues with the condition variable paths I'm pretty sure * dbus/dbus-server.c: add a mutex on DBusServer and appropriate lock/unlock calls * dbus/dbus-connection.c (_dbus_connection_do_iteration_unlocked): rename to add _unlocked (struct DBusConnection): move "dispatch_acquired" and "io_path_acquired" to use only one bit each. (CONNECTION_LOCK, CONNECTION_UNLOCK): add checks with !DBUS_DISABLE_CHECKS (dbus_connection_set_watch_functions): hacky fix to reentrancy (_dbus_connection_add_watch, _dbus_connection_remove_watch) (_dbus_connection_toggle_watch, _dbus_connection_add_timeout) (_dbus_connection_remove_timeout) (_dbus_connection_toggle_timeout): drop lock when calling out to user functions; done in a hacky/bad way. (_dbus_connection_send_and_unlock): add a missing unlock (_dbus_connection_block_for_reply): add a missing unlock * dbus/dbus-transport.c (_dbus_transport_get_is_authenticated): drop lock in a hacky probably unsafe way to call out to user function
* 2005-02-10 Havoc Pennington <hp@redhat.com>Havoc Pennington2005-02-111-3/+7
| | | | | | | | | | | | | | | | | | * test/glib/test-dbus-glib.c (main): fix so this test doesn't fail (call dbus_g_proxy_add_signal) * dbus/dbus-server-unix.c (_dbus_server_new_for_tcp_socket): escape the hostname (_dbus_server_new_for_domain_socket): escape the path * dbus/dbus-address.c (dbus_address_escape_value): new (dbus_address_unescape_value): new (dbus_parse_address): unescape values * dbus/dbus-string.c (_dbus_string_append_byte_as_hex): new function * doc/dbus-specification.xml: explain how to escape values in addresses
* 2004-11-25 Havoc Pennington <hp@redhat.com>Havoc Pennington2004-11-261-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The primary change here is to always write() once before adding the write watch, which gives us about a 10% performance increase. * dbus/dbus-transport-unix.c: a number of modifications to cope with removing messages_pending (check_write_watch): properly handle DBUS_AUTH_STATE_WAITING_FOR_MEMORY; adapt to removal of messages_pending stuff (check_read_watch): properly handle WAITING_FOR_MEMORY and AUTHENTICATED cases (unix_handle_watch): after writing, see if the write watch can be removed (unix_do_iteration): assert that write_watch/read_watch are non-NULL rather than testing that they aren't, since they aren't allowed to be NULL. check_write_watch() at the end so we add the watch if we did not finish writing (e.g. got EAGAIN) * dbus/dbus-transport-protected.h: remove messages_pending call, since it resulted in too much inefficient watch adding/removing; instead we now require that the transport user does an iteration after queueing outgoing messages, and after trying the first write() we add a write watch if we got EAGAIN or exceeded our max bytes to write per iteration setting * dbus/dbus-string.c (_dbus_string_validate_signature): add this function * dbus/dbus-server-unix.c (unix_finalize): the socket name was freed and then accessed, valgrind flagged this bug, fix it * dbus/dbus-message.c: fix several bugs where HEADER_FIELD_LAST was taken as the last valid field plus 1, where really it is equal to the last valid field. Corrects some message corruption issues. * dbus/dbus-mainloop.c: verbosity changes * dbus/dbus-keyring.c (_dbus_keyring_new_homedir): handle OOM instead of aborting in one of the test codepaths * dbus/dbus-internals.c (_dbus_verbose_real): fix a bug that caused not printing the pid ever again if a verbose was missing the newline at the end (_dbus_header_field_to_string): add HEADER_FIELD_SIGNATURE * dbus/dbus-connection.c: verbosity changes; (dbus_connection_has_messages_to_send): new function (_dbus_connection_message_sent): no longer call transport->messages_pending (_dbus_connection_send_preallocated_unlocked): do one iteration to try to write() immediately, so we can avoid the write watch. This is the core purpose of this patchset (_dbus_connection_get_dispatch_status_unlocked): if disconnected, dump the outgoing message queue, so nobody will get confused trying to send them or thinking stuff is pending to be sent * bus/test.c: verbosity changes * bus/driver.c: verbosity/assertion changes * bus/dispatch.c: a bunch of little tweaks to get it working again because this patchset changes when/where you need to block.
* 2004-08-09 Havoc Pennington <hp@redhat.com>Havoc Pennington2004-08-101-1/+1
| | | | | * COPYING: switch to Academic Free License version 2.1 instead of 2.0, to resolve complaints about patent termination clause.
* 2004-06-20 Havoc Pennington <hp@redhat.com>Havoc Pennington2004-06-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * dbus/dbus-glib-error-enum.h: autogenerate the GError enum codes from the dbus error names * glib/dbus-glib.h: move to subdir dbus/ since it's included as dbus/dbus-glib.h and that breakage is now visible due to including dbus/dbus-glib.h in dbus-glib-lowlevel.h * glib/dbus-glib.h: s/gproxy/g_proxy/ * dbus/dbus-shared.h: new header to hold stuff shared with binding APIs * dbus/dbus-protocol.h (DBUS_ERROR_*): move errors here rather than dbus-errors.h * glib/dbus-glib.h (dbus_set_g_error): move to dbus-glib-lowlevel.h * glib/dbus-glib.h: remove dbus/dbus.h from here; change a bunch of stuff to enable this * dbus/dbus-glib-lowlevel.h: put dbus/dbus.h here * a bunch of other changes with the same basic "separate glib bindings from dbus.h" theme
* 2004-04-21 Kristian Høgsberg <krh@redhat.com>Kristian Høgsberg2004-04-211-3/+3
| | | | | | | | | | * dbus/dbus-server-unix.c (unix_finalize): Don't unref unix_server->watch here, it is unreffed in disconnect. (_dbus_server_new_for_tcp_socket): convert NULL host to "localhost" here so we don't append NULL to address. * dbus/dbus-server.c (_dbus_server_test): Add test case for various addresses, including tcp with no explicit host.
* 2003-12-02 Richard Hult <richard@imendio.com>Richard Hult2003-12-021-1/+1
| | | | | * Update AFL version to 2.0 throughout the source files to reflect the update that was done a while ago.
* 2003-08-12 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-08-121-0/+1
| | | | | | | | | | | | | | | | | | * bus/dispatch.c (bus_dispatch): make this return proper DBusHandlerResult to avoid DBUS_ERROR_UNKNOWN_METHOD * dbus/dbus-errors.c (dbus_set_error): use _dbus_string_append_printf_valist * dbus/dbus-string.c (_dbus_string_append_printf_valist) (_dbus_string_append_printf): new * dbus/dbus-errors.h (DBUS_ERROR_UNKNOWN_MESSAGE): change to UNKNOWN_METHOD * dbus/dbus-connection.c (dbus_connection_dispatch): handle DBUS_HANDLER_RESULT_NEED_MEMORY; send default error reply if a message is unhandled.
* 2003-06-04 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-06-041-2/+7
| | | | | | | | | | | | | | | | | | | | | | * dbus/dbus-server.c (dbus_server_listen): allow abstract sockets using unix:abstract=/foo, and when listening in a tmpdir i.e. unix:tmpdir=/tmp, always use abstract sockets if we can. * dbus/dbus-transport.c (_dbus_transport_open): support unix:abstract=/foo * dbus/dbus-server-unix.c (_dbus_server_new_for_domain_socket): support abstract sockets * dbus/dbus-transport-unix.c (_dbus_transport_new_for_domain_socket): support abstract sockets * dbus/dbus-sysdeps.c (_dbus_connect_unix_socket): add "abstract" toggle as an argument, implement abstract namespace support (_dbus_listen_unix_socket): ditto * configure.in: add --enable-abstract-sockets and implement a configure check for autodetection of the right value.
* 2003-04-18 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-04-181-12/+14
| | | | | | | | | | | | | | * glib/dbus-gmain.c: adapt to watch changes * bus/bus.c, bus/activation.c, etc.: adjust to watch changes * dbus/dbus-server.h: remove dbus_server_handle_watch * dbus/dbus-connection.h: remove dbus_connection_handle_watch * dbus/dbus-watch.c (dbus_watch_handle): change DBusWatch to work like DBusTimeout, so we don't need dbus_connection_handle_watch etc.
* 2003-04-16 Havoc Pennington <hp@redhat.com>Havoc Pennington2003-04-161-3/+0
| | | | | | | | | | | | | * dbus/dbus-message.c (_dbus_message_add_size_counter): keep a list of size counters (_dbus_message_loader_putback_message_link): put back a popped link * dbus/dbus-connection.c (dbus_connection_set_max_live_messages_size): rename max_received_size (dbus_connection_get_outgoing_size): get size of outgoing queue (_dbus_connection_set_connection_counter): remove this cruft
* 2003-04-06 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-04-061-12/+40
| | | | | | | | | | | | * dbus/dbus-server-unix.c (_dbus_server_new_for_domain_socket): save the domain socket name, and unlink it when we disconnect the server. Means that at least when we exit normally, we won't leave a bunch of junk in /tmp * dbus/dbus-transport-unix.c (_dbus_transport_new_for_domain_socket): code cleanup (nicer memory management). (I was making a real change here but then didn't)
* 2003-04-01 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-04-011-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | * dbus/dbus-server.c (dbus_server_set_auth_mechanisms): new function * dbus/dbus-auth.c (_dbus_auth_set_mechanisms): new * dbus/dbus-internals.c (_dbus_dup_string_array): new function * dbus/dbus-sysdeps.c (_dbus_listen_unix_socket): chmod the socket 0777, and unlink any existing socket. * bus/bus.c (bus_context_new): change our UID/GID and fork if the configuration file so specifies; set up auth mechanism restrictions * bus/config-parser.c (bus_config_parser_content): add support for <fork> option and fill in code for <auth> * bus/system.conf.in: add <fork/> to default configuration, and limit auth mechanisms to EXTERNAL * doc/config-file.txt (Elements): add <fork> * dbus/dbus-sysdeps.c (_dbus_become_daemon): new function (_dbus_change_identity): new function
* 2003-03-31 Havoc Pennington <hp@redhat.com>Havoc Pennington2003-03-311-2/+2
| | | | | | | | | | | | Fix some annoying DBusString API and fix all affected code. * dbus/dbus-string.c (_dbus_string_init): get rid of annoying max_length argument (_dbus_string_get_data): change to return string instead of using an out param (_dbus_string_get_const_data): ditto (_dbus_string_get_data_len): ditto (_dbus_string_get_const_data_len): ditto
* 2003-03-31 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-03-311-9/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | * dbus/dbus-transport-unix.c (_dbus_transport_new_for_domain_socket) (_dbus_transport_new_for_tcp_socket): these didn't need the "server" argument since they are always client side * dbus/dbus-server.c (dbus_server_get_address): new function * bus/main.c (main): take the configuration file as an argument. * test/data/valid-config-files/debug-allow-all.conf: new file to use with dispatch.c tests for example * bus/test-main.c (main): require test data dir * bus/bus.c (bus_context_new): change this to take a configuration file name as argument * doc/config-file.txt (Elements): add <servicedir> * bus/system.conf, bus/session.conf: new files * dbus/dbus-bus.c (dbus_bus_get): look for system bus on well-known socket if none set * configure.in: create system.conf and session.conf
* 2003-03-24 Havoc Pennington <hp@redhat.com>Havoc Pennington2003-03-251-9/+14
| | | | | | | | | | | | | | | | * dbus/dbus-sysdeps.c (_dbus_set_fd_nonblocking): move to this file * dbus/dbus-errors.c (dbus_set_error, dbus_set_error_const): allow NULL argument for "message" if the error is a well-known one, fill in a generic message in this case. * dbus/dbus-errors.h (DBusResultCode): Kill DBusResultCode in favor of DBusError * bus/test.c (bus_test_flush_bus): add * bus/policy.c (bus_policy_test): test code stub
* 2003-03-16 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-03-171-6/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * dbus/dbus-watch.c (_dbus_watch_new): handle failure to malloc the watch * dbus/dbus-server-debug-pipe.c (_dbus_transport_debug_pipe_new): add some missing dbus_set_result * bus/dispatch.c (bus_dispatch_add_connection): handle failure to alloc the DBusMessageHandler * dbus/dbus-transport.c (_dbus_transport_disconnect): don't ref the transport here, since we call this from the finalizer; it resulted in a double-finalize. * dbus/dbus-transport.c (_dbus_transport_disconnect): fix a bug where we tried to use transport->connection that was NULL, happened when transport was disconnected early on due to OOM * bus/*.c: adapt to handle OOM for watches/timeouts * dbus/dbus-transport-unix.c: port to handle OOM during watch handling * dbus/dbus-auth.c (_dbus_auth_get_unused_bytes): return a reference to unused bytes instead of a copy * dbus/dbus-server.c (dbus_server_handle_watch): return FALSE for out of memory * dbus/dbus-connection.c (dbus_connection_handle_watch): return FALSE on OOM * dbus/dbus-timeout.c (dbus_timeout_handle): return FALSE for out of memory
* 2003-03-15 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-03-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make it pass the Hello handling test including all OOM codepaths. Now to do other messages... * bus/services.c (bus_service_remove_owner): fix crash when removing owner from an empty list of owners (bus_registry_ensure): don't leave service in the list of a connection's owned services if we fail to put the service in the hash table. * bus/connection.c (bus_connection_preallocate_oom_error): set error flag on the OOM error. * dbus/dbus-connection.c (_dbus_connection_new_for_transport): handle _dbus_transport_set_connection failure * dbus/dbus-transport-unix.c (_dbus_transport_new_for_fd): modify to create watches up front and simply enable/disable them as needed. (unix_connection_set): this can now fail on OOM * dbus/dbus-timeout.c, dbus/dbus-watch.c: add concept of enabling/disabling a watch or timeout. * bus/loop.c (bus_loop_iterate): don't touch disabled watches/timeouts * glib/dbus-gmain.c: adapt to enable/disable watches and timeouts
* 2003-02-26 Alexander Larsson <alexl@redhat.com>Alexander Larsson2003-02-261-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * configure.in: Set DBUS_GLIB_THREADS_LIBS for apps using gthread-2.0 * dbus/dbus-connection.c: * dbus/dbus-connection.h: Fix _dbus_connection_acquire_io_path and _dbus_connection_acquire_dispatch. Add dbus_connection_set_wakeup_main_function and use it when queueing incoming and outgoing messages. * dbus/dbus-dataslot.c: Threadsafe usage of DBusDataSlotAllocator * dbus/dbus-message.c: (dbus_message_get_args_iter): dbus_new can fail. * dbus/dbus-server-unix.c: Add todo comment * glib/dbus-gmain.c: Implement the new wakeup functions for glib. * glib/Makefile.am: * glib/test-thread-client.c: * glib/test-thread-server.c: * glib/test-thread.h: Initial cut at some thread test code. Not really done yet.
* 2003-02-19 Mikael Hallendal <micke@codefactory.se>Mikael Hallendal2003-02-191-0/+35
| | | | | | | | | | | | | | | | | * dbus/dbus-server.c (dbus_server_listen): Support tcp: addresses. * dbus/dbus-transport-unix.c (_dbus_transport_new_for_tcp_socket): Added to create a transport connecting using a tcp/ip socket. * dbus/dbus-sysdeps.c (_dbus_connect_tcp_socket): Added to connect to a tcp socket at given host and port. (_dbus_listen_tcp_socket): added to listen on tcp socket for given hostname and port. * dbus/dbus-server.c (dbus_server_listen): Support tcp: addresses. * dbus/dbus-server-unix.c (_dbus_server_new_for_tcp_socket): Added to create a server listening on a TCP/IP socket.
* 2003-02-16 Anders Carlsson <andersca@codefactory.se>Anders Carlsson2003-02-161-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * bus/activation.c: (load_directory), (bus_activation_init), (bus_activation_activate_service): * bus/activation.h: * bus/driver.c: (bus_driver_handle_activate_service), (bus_driver_handle_message): More work on the activation handling. * dbus/dbus-errors.h: Add some error messages * dbus/dbus-message.c: (dbus_message_new_error_reply): * dbus/dbus-message.h: New function that creates an error message. * dbus/dbus-protocol.h: Add ACTIVATE_SERVER message. * dbus/dbus-server-unix.c: (unix_handle_watch), (_dbus_server_new_for_domain_socket): Call _dbus_fd_set_close_on_exec. * dbus/dbus-sysdeps.c: (make_pipe), (do_exec), (_dbus_spawn_async), (_dbus_disable_sigpipe), (_dbus_fd_set_close_on_exec): * dbus/dbus-sysdeps.h: Add _dbus_fd_set_close_on exec function. Also add function that checks that all open fds are set to close-on-exec and warns otherwise. * dbus/dbus-transport-unix.c: (_dbus_transport_new_for_domain_socket): Call _dbus_fd_set_close_on_exec.
* 2003-01-19 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-01-191-0/+3
| | | | | | | | | | * dbus/dbus-connection.c (dbus_connection_get_is_authenticated): new function * dbus/dbus-server.c (dbus_server_set_max_connections) (dbus_server_get_max_connections, dbus_server_get_n_connections): keep track of current number of connections, and add API for setting a max (but haven't implemented enforcing the max yet)
* 2003-01-04 Havoc Pennington <hp@pobox.com>Havoc Pennington2003-01-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | * test/watch.c (error_handler): make it safe if the error handler is called multiple times (if we s/error handler/disconnect handler/ we should just guarantee it's called only once) * dbus/dbus-transport.c (_dbus_transport_disconnect): call the error handler on disconnect (it's quite possible we should just change the error handler to a "disconnect handler," I'm not sure we have any other meaningful errors) * configure.in: check for getpwnam_r * dbus/dbus-transport.c, dbus/dbus-transport-unix.c, dbus/dbus-auth.c: add credentials support, add EXTERNAL auth mechanism as in SASL spec, using socket credentials * dbus/dbus-sysdeps.c (_dbus_read_credentials_unix_socket): new function (_dbus_send_credentials_unix_socket): new function * dbus/dbus-sysdeps.c (_dbus_accept_unix_socket): rename just dbus_accept() (_dbus_write): only check errno if <0 returned (_dbus_write_two): ditto
* 2002-12-26 Havoc Pennington <hp@pobox.com>Havoc Pennington2002-12-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * dbus/dbus-marshal.h (DBUS_COMPILER_BYTE_ORDER): #ifdef WORDS_BIGENDIAN then compiler byte order is DBUS_BIG_ENDIAN, doh * dbus/dbus-marshal.c: Add macros to do int swapping in-place and avoid swap_bytes() overhead (ignoring possible assembly stuff for now). Main point is because I wanted unpack_uint32 to implement _dbus_verbose_bytes (_dbus_verbose_bytes): new function * dbus/dbus-string.c (_dbus_string_validate_ascii): new function * dbus/dbus-message.c (_dbus_message_loader_get_is_corrupted): add mechanism to handle a corrupt message stream (_dbus_message_loader_new): fix preallocation to only prealloc, not prelengthen * dbus/dbus-string.c (_dbus_string_skip_blank): fix this function (_dbus_string_test): enhance tests for copy/move and fix the functions * dbus/dbus-transport-unix.c: Hold references in more places to avoid reentrancy problems * dbus/dbus-transport.c: ditto * dbus/dbus-connection.c (dbus_connection_dispatch_message): don't leak reference count in no-message case * test/watch.c (do_mainloop): handle adding/removing watches during iteration over the watches. Also, ref the connection/server stored on a watch, so we don't try to mangle a destroyed one. * dbus/dbus-transport-unix.c (do_authentication): perform authentication * dbus/dbus-auth.c (get_state): add a state AUTHENTICATED_WITH_UNUSED_BYTES and return it if required (_dbus_auth_get_unused_bytes): append the unused bytes to the passed in string, rather than prepend * dbus/dbus-transport.c (_dbus_transport_init_base): create the auth conversation DBusAuth * dbus/dbus-transport-unix.c (_dbus_transport_new_for_fd) (_dbus_transport_new_for_domain_socket): when creating a transport, pass in whether it's a client-side or server-side transport so we know which DBusAuth to create
* 2002-12-12 Havoc Pennington <hp@pobox.com>Havoc Pennington2002-12-131-47/+6
| | | | | | | | | | | | | | * dbus/dbus-transport-unix.c, dbus/dbus-server-unix.c: use the below new interfaces and include fewer system headers. * dbus/dbus-sysdeps.c (_dbus_read): new function (_dbus_write): new function (_dbus_write_two): new function (_dbus_connect_unix_socket): new function (_dbus_listen_unix_socket): new function * dbus/dbus-message-internal.h: change interfaces to use DBusString
* 2002-11-24 Havoc Pennington <hp@pobox.com>Havoc Pennington2002-11-251-0/+303
* test/echo-client.c, test/echo-server.c: cheesy test clients. * configure.in (AC_CHECK_FUNCS): check for writev * dbus/dbus-message.c (_dbus_message_get_network_data): new function * dbus/dbus-list.c (_dbus_list_foreach): new function * dbus/dbus-internals.c (_dbus_verbose): new function * dbus/dbus-server.c, dbus/dbus-server.h: public object representing a server that listens for connections. * dbus/.cvsignore: create * dbus/dbus-errors.h, dbus/dbus-errors.c: public API for reporting errors * dbus/dbus-connection.h, dbus/dbus-connection.c: public object representing a connection that sends/receives messages. (Same object used for both client and server.) * dbus/dbus-transport.h, dbus/dbus-transport.c: Basic abstraction for different kinds of stream that we might read/write messages from.