Anders Carlsson [Sat, 1 Feb 2003 21:26:32 +0000 (21:26 +0000)]
2003-02-01 Anders Carlsson <andersca@codefactory.se>
* bus/driver.c: (create_unique_client_name),
(bus_driver_handle_hello):
Don't take a name, just use a numeric id to identify
each client.
* dbus/Makefile.am:
* dbus/dbus-bus.c: (dbus_bus_register_client),
(dbus_bus_acquire_service), (dbus_bus_service_exists):
* dbus/dbus-bus.h:
Add new convenience functions for communicating with the bus.
* dbus/dbus-message.c: refactor the test code to be more general,
in preparation for writing a "randomly permute test cases to
try to break the loader" program.
* doc/dbus-specification.sgml: work on the specification
* dbus/dbus-message.c (_dbus_message_loader_return_buffer): check
the protocol version of the message.
* dbus/dbus-protocol.h: drop special _REPLY names, the spec
no longer specifies that.
(DBUS_SERVICE_REPLY_SERVICE_EXISTS): fix flags (1/2/4/8 not
1/2/3/4)
* dbus/dbus-marshal.c (_dbus_marshal_get_arg_end_pos): add missing
"break" for DBUS_TYPE_NIL, remove @todo
Havoc Pennington [Fri, 31 Jan 2003 03:49:42 +0000 (03:49 +0000)]
2003-01-31 Havoc Pennington <hp@pobox.com>
* doc/dbus-specification.sgml: fully specify the header. Add
flags and major protocol version, and change header/body len to
unsigned.
* dbus/dbus-message-builder.c (append_saved_length): append length
as uint32
* dbus/dbus-message.c (dbus_message_create_header): change header
length and body length to unsigned. Add the new fields from the
spec
(_dbus_message_loader_return_buffer): unsigned header/body len
Havoc Pennington [Fri, 31 Jan 2003 00:56:01 +0000 (00:56 +0000)]
2003-01-30 Havoc Pennington <hp@pobox.com>
* dbus/dbus-server.c (dbus_server_listen): @todo about how we need
a better way to report errors here. e.g. "unix address lacks
path" or something. also "no such file" when the path doesn't
exist, etc.
* dbus/dbus-address.c (dbus_address_entries_free): add @todo about
leaking list nodes
(dbus_parse_address): add @todo about documenting address format,
and allowing , and ; to be escaped
Havoc Pennington [Thu, 30 Jan 2003 04:20:44 +0000 (04:20 +0000)]
2003-01-30 Havoc Pennington <hp@pobox.com>
* dbus/dbus-message.c: use message->byte_order instead of
DBUS_COMPILER_BYTE_ORDER throughout.
(dbus_message_create_header): pad header to align the
start of the body of the message to 8-byte boundary
* dbus/dbus-marshal.h: make all the demarshalers take const
DBusString arguments.
* dbus/dbus-message.c (_dbus_message_loader_return_buffer):
validate message args here, so we don't have to do slow validation
later, and so we catch bad messages as they are incoming. Also add
better checks on header_len and body_len. Also fill in
message->byte_order
* dbus/dbus-string.c (_dbus_string_validate_utf8): new (not
implemented properly)
(_dbus_string_validate_nul): new function to check all-nul
* dbus/dbus-marshal.c (_dbus_marshal_get_field_end_pos): rename
get_arg_end_pos and remove all validation
(_dbus_marshal_validate_arg): actually do validation here.
Havoc Pennington [Tue, 28 Jan 2003 19:56:41 +0000 (19:56 +0000)]
2003-01-28 Havoc Pennington <hp@redhat.com>
* dbus/dbus-string.c (_dbus_string_base64_decode): append bytes in
the reverse order from how I had it
(_dbus_string_base64_encode): reverse encoding order. I was
basically byteswapping everything during encoding.
Anders Carlsson [Tue, 28 Jan 2003 14:28:05 +0000 (14:28 +0000)]
2003-01-28 Anders Carlsson <andersca@codefactory.se>
* dbus/dbus-connection-internal.h:
* dbus/dbus-connection.c: (_dbus_connection_add_timeout),
(_dbus_connection_remove_timeout):
Add functions for adding and removing timeouts.
* dbus/dbus-message.c: (dbus_message_new_from_message):
Add new function that takes a message and creates an exact
copy of it, but with the refcount set to 1.
(check_message_handling):
Fix build error.
* dbus/dbus-server-protected.h:
* dbus/dbus-server.c: (_dbus_server_init_base),
(_dbus_server_finalize_base), (_dbus_server_add_timeout),
(dbus_server_set_timeout_functions):
(_dbus_server_remove_timeout):
New functions so that a server can add and remove timeouts.
(dbus_server_listen):
Add commented out call to dbus_server_debug_new.
* dbus/dbus-timeout.c: (_dbus_timeout_new):
Actually set the handler, doh.
* dbus/dbus-transport.c: (_dbus_transport_open):
Add commented out call to dbus_transport_debug_client_new.
* dbus/Makefile.am:
Add dbus-transport-debug.[ch] and dbus-server-debug.[ch]
Anders Carlsson [Tue, 28 Jan 2003 14:26:49 +0000 (14:26 +0000)]
2003-01-28 Anders Carlsson <set EMAIL_ADDRESS environment variable>
* dbus/dbus-connection-internal.h:
* dbus/dbus-connection.c: (_dbus_connection_add_timeout),
(_dbus_connection_remove_timeout):
Add functions for adding and removing timeouts.
* dbus/dbus-message.c: (dbus_message_new_from_message):
Add new function that takes a message and creates an exact
copy of it, but with the refcount set to 1.
(check_message_handling):
Fix build error.
* dbus/dbus-server-protected.h:
* dbus/dbus-server.c: (_dbus_server_init_base),
(_dbus_server_finalize_base), (_dbus_server_add_timeout),
(dbus_server_set_timeout_functions):
(_dbus_server_remove_timeout):
New functions so that a server can add and remove timeouts.
(dbus_server_listen):
Add commented out call to dbus_server_debug_new.
* dbus/dbus-timeout.c: (_dbus_timeout_new):
Actually set the handler, doh.
* dbus/dbus-transport.c: (_dbus_transport_open):
Add commented out call to dbus_transport_debug_client_new.
* dbus/Makefile.am:
Add dbus-transport-debug.[ch] and dbus-server-debug.[ch]
Havoc Pennington [Tue, 28 Jan 2003 03:53:29 +0000 (03:53 +0000)]
2003-01-27 Havoc Pennington <hp@pobox.com>
* dbus/dbus-mempool.c (time_for_size): replace printf with
_dbus_verbose
* dbus/dbus-message-builder.c (_dbus_message_data_load): allow
empty lines; fix the SAVE_LENGTH stuff to be
START_LENGTH/END_LENGTH so it actually works; couple other
bugfixes
* test/Makefile.am (dist-hook): add dist-hook for .message files
* dbus/dbus-string.c (DBUS_STRING_COPY_PREAMBLE): source of a copy
can be constant or locked.
(_dbus_string_free): allow freeing a const string as
documented/intended
* dbus/dbus-test-main.c (main): take an argument which is the
directory containing test data
* dbus/dbus-message.c (_dbus_message_test): pass a test_data_dir
argument to this and load all the messages in test/data/
checking that they can be loaded or not loaded as appropriate.
Anders Carlsson [Mon, 27 Jan 2003 11:20:55 +0000 (11:20 +0000)]
2003-01-27 Anders Carlsson <andersca@codefactory.se>
* bus/dispatch.c: (bus_dispatch_message_handler):
Dispatch messages sent to services.
* bus/driver.c: (bus_driver_send_service_deleted),
(bus_driver_send_service_created), (bus_driver_send_service_lost),
(bus_driver_send_service_acquired):
Add helper functions for sending service related messages.
(bus_driver_send_welcome_message):
Send HELLO_REPLY instead of WELCOME.
(bus_driver_handle_list_services):
Send LIST_SERVICES_REPLY instead of SERVICES.
(bus_driver_handle_own_service),
(bus_driver_handle_service_exists):
New message handlers.
(bus_driver_handle_message):
Invoke new message handlers.
(bus_driver_remove_connection):
Don't remove any services here since that's done automatically
by bus_service_remove_owner now.
* bus/driver.h:
New function signatures.
* bus/services.c: (bus_service_add_owner):
Send ServiceAcquired message if we're the only primary owner.
Havoc Pennington [Sun, 26 Jan 2003 07:48:16 +0000 (07:48 +0000)]
2003-01-26 Havoc Pennington <hp@pobox.com>
The unit tests pass, but otherwise untested. If it breaks, the
tests should have been better. ;-)
* bus/driver.c (bus_driver_handle_hello): return if we disconnect
the connection.
* dbus/dbus-message.c: redo everything so we maintain
message->header as the only copy of the various fields.
This avoids the possibility of out-of-memory in some cases,
for example dbus_message_lock() can't run out of memory anymore,
and avoids extra copying. Figured I may as well go ahead and do
this since it was busted for dbus_message_lock to not return
failure on OOM, and dbus_message_write_header was totally
unchecked for OOM. Also fixed some random other bugs.
* dbus/dbus-marshal.c (_dbus_marshal_get_field_end_pos): verify
that strings are nul-terminated. Also, end_pos can be equal
to string length just not greater than, I think.
(_dbus_marshal_set_int32): new function
(_dbus_marshal_set_uint32): new function
(_dbus_marshal_set_string): new function
* dbus/dbus-connection.c (_dbus_connection_new_for_transport): fix
a warning, init timeout_list to NULL
(dbus_connection_send_message): don't use uninitialized variable
"serial"
* dbus/dbus-string.c (_dbus_string_replace_len): new function
Anders Carlsson [Sat, 25 Jan 2003 21:22:57 +0000 (21:22 +0000)]
2003-01-25 Anders Carlsson <andersca@codefactory.se>
* glib/dbus-gmain.c: (dbus_connection_prepare),
(dbus_connection_check), (dbus_connection_dispatch), (add_watch),
(remove_watch), (dbus_connection_hookup_with_g_main):
Rewrite the glib handling to use its own GSource instead of a
GIOChannel so we can catch messages put in the queue while waiting
for a reply.
Anders Carlsson [Sat, 25 Jan 2003 20:53:53 +0000 (20:53 +0000)]
2003-01-25 Anders Carlsson <andersca@codefactory.se>
* bus/Makefile.am:
* bus/connection.c: (connection_disconnect_handler),
(connection_watch_callback), (bus_connection_setup):
* bus/dispatch.c: (send_one_message),
(bus_dispatch_broadcast_message), (bus_dispatch_message_handler),
(bus_dispatch_add_connection), (bus_dispatch_remove_connection):
* bus/dispatch.h:
* bus/driver.c: (bus_driver_send_service_deleted),
(bus_driver_send_service_created), (bus_driver_handle_hello),
(bus_driver_send_welcome_message),
(bus_driver_handle_list_services), (bus_driver_remove_connection),
(bus_driver_handle_message):
* bus/driver.h:
Refactor code, put the message dispatching in its own file. Use
_DBUS_HANDLE_OOM. Also send ServiceDeleted messages when a client
is disconnected.
Anders Carlsson [Sat, 25 Jan 2003 09:37:49 +0000 (09:37 +0000)]
2003-01-25 Anders Carlsson <andersca@codefactory.se>
* dbus/dbus-connection.c: (dbus_connection_send_message):
* dbus/dbus-message-internal.h:
* dbus/dbus-message.c: (_dbus_message_get_client_serial),
(dbus_message_write_header):
Remove _dbus_messag_unlock and don't set the client serial on a
message if one already exists.
Anders Carlsson [Fri, 24 Jan 2003 23:51:59 +0000 (23:51 +0000)]
2003-01-25 Anders Carlsson <andersca@codefactory.se>
* bus/connection.c: (bus_connection_foreach):
* bus/connection.h:
Add new bus_connection_foreach function.
* bus/driver.c: (send_one_message), (bus_driver_broadcast_message):
Add function that broadcasts a message to all clients.
(bus_driver_send_service_created), (bus_driver_handle_hello),
(bus_driver_send_welcome_message),
(bus_driver_handle_list_services), (bus_driver_message_handler):
Implement functions that take care of listing services, and notifying
clients when new services are created.
* bus/services.c: (bus_services_list):
* bus/services.h:
Add new function that returns an array of strings with the currently
registered services.
Anders Carlsson [Tue, 21 Jan 2003 12:42:33 +0000 (12:42 +0000)]
2003-01-21 Anders Carlsson <andersca@codefactory.se>
* bus/Makefile.am:
Add driver.[ch]
* bus/connection.c: (connection_disconnect_handler):
Remove the connection from the bus driver's list.
(connection_watch_callback): Dispatch messages.
(free_connection_data): Free connection name.
(bus_connection_setup): Add connection to the bus driver's list.
(bus_connection_remove_owned_service):
(bus_connection_set_name), (bus_connection_get_name):
Add functions for setting and getting the connection's name.
* bus/connection.h:
Add function headers.
* bus/driver.c: (create_unique_client_name),
(bus_driver_handle_hello_message),
(bus_driver_send_welcome_message), (bus_driver_message_handler),
(bus_driver_add_connection), (bus_driver_remove_connection):
* bus/driver.h:
* bus/main.c:
* bus/services.c: (bus_service_free):
* bus/services.h:
New file that handles communication and registreation with the bus
itself.
Anders Carlsson [Tue, 21 Jan 2003 09:23:18 +0000 (09:23 +0000)]
2003-01-21 Anders Carlsson <andersca@codefactory.se>
* dbus/dbus-connection.c: (dbus_connection_send_message):
Add a new client_serial parameter.
(dbus_connection_send_message_with_reply):
Remove a @todo since we've implemented the blocking function.
(dbus_connection_send_message_with_reply_and_block):
New function that sends a message and waits for a reply and
then returns the reply.
* dbus/dbus-connection.h:
Add new functions.
* dbus/dbus-errors.c: (dbus_result_to_string):
* dbus/dbus-errors.h:
Add new DBUS_RESULT.
* dbus/dbus-message-internal.h:
* dbus/dbus-message.c: (_dbus_message_get_reply_serial),
(_dbus_message_set_sender), (dbus_message_write_header),
(dbus_message_new_reply), (decode_header_data),
(_dbus_message_loader_return_buffer), (_dbus_message_test):
* dbus/dbus-message.h:
Add new functions that set the reply serial and sender.
Also marshal and demarshal them correctly and add test.
* dbus/dbus-protocol.h:
Add new DBUS_MESSAGE_TYPE_SENDER.
* glib/dbus-glib.h:
* glib/dbus-gmain.c: (watch_callback), (free_callback_data),
(add_watch), (remove_watch), (add_timeout), (remove_timeout),
(dbus_connection_hookup_with_g_main):
* glib/test-dbus-glib.c: (main):
Rewrite to use GIOChannel and remove the GSource crack.
* test/echo-client.c: (main):
* test/watch.c: (check_messages):
Update for changed APIs
Anders Carlsson [Sun, 19 Jan 2003 21:55:49 +0000 (21:55 +0000)]
2003-01-19 Anders Carlsson <andersca@codefactory.se>
* dbus/Makefile.am: Add dbus-timeout.[cħ]
* dbus/dbus-connection.c: (_dbus_connection_new_for_transport):
Create a DBusTimeoutList.
(dbus_connection_set_timeout_functions): Add new function to
set timeout callbacks
* dbus/dbus-connection.h: Add public DBusTimeout API.
* dbus/dbus-message.c: (dbus_message_get_service):
* dbus/dbus-message.h: New function.
* dbus/dbus-server.c: Fix small doc typo.
* dbus/dbus-timeout.[ch]: New files for mainloop timeouts.
Havoc Pennington [Sun, 19 Jan 2003 05:14:46 +0000 (05:14 +0000)]
2003-01-19 Havoc Pennington <hp@pobox.com>
* 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)
Havoc Pennington [Sun, 19 Jan 2003 03:33:35 +0000 (03:33 +0000)]
2003-01-18 Havoc Pennington <hp@pobox.com>
* dbus/dbus-transport-unix.c (unix_do_iteration): only do the
reading/writing if read_watch != NULL or write_watch != NULL.
* dbus/dbus-message.c (_dbus_message_loader_return_buffer): fix
the message loader code to actually load message->header and
message->body into the newly-created message.
* dbus/dbus-transport-unix.c (check_write_watch): fix a mem leak
in OOM case
Anders Carlsson [Tue, 14 Jan 2003 11:19:06 +0000 (11:19 +0000)]
2003-01-14 Anders Carlsson <andersca@codefactory.se>
* bus/connection.c: (connection_error_handler),
(bus_connection_setup):
* bus/main.c: (main):
Make sure that the DBusConnectionData struct is NULLed
out to prevent a segfault.
* dbus/dbus-errors.c: (dbus_result_to_string):
* dbus/dbus-errors.h:
* dbus/dbus-message.c: (dbus_message_get_fields),
(dbus_message_get_fields_valist), (_dbus_message_test):
* dbus/dbus-message.h:
Make dbus_message_get_fields return a result code so we can
track invalid fields as well as oom.
* dbus/dbus-string.c (_dbus_string_align_length): new function
* dbus/dbus-test-main.c: move main() for test app here
* dbus/dbus-test.c
(dbus_internal_symbol_do_not_use_run_tests): we have to export a
symbol to run tests, because dbus-test isn't in the main
library
Code review nitpicks.
* dbus/dbus-message.c (dbus_message_write_header): add newlines
for people with narrow emacs ;-). Assert client_serial was filled
in. Assert message->name != NULL.
(dbus_message_append_fields): have "first_field_type" arg separate
from va list, needed for C++ binding that also uses varargs IIRC
and helps with type safety
(dbus_message_new): add @todo about using DBusString to store
service/name internally
(dbus_message_new): don't leak ->service and ->name on OOM later
in the function
(dbus_message_unref): free the service name
(dbus_message_get_fields): same change to varargs
i.e. first_field_type
(_dbus_message_loader_return_buffer): assert that the message data
is aligned (if not it's a bug in our code). Put in verbose griping
about why we set corrupted = TRUE.
(decode_header_data): add FIXME that char* is evil. Was going to
add FIXME about evil locale-specific string.h strncmp, but just
switched to wacky string-as-uint32 optimization. Move check for
"no room for field name" above get_const_data_len() to avoid
assertion failure in get_const_data_len if we have trailing 2
bytes or the like. Check for service and name fields being
provided twice. Don't leak service/name on error. Require field
names to be aligned to 4 bytes.
* dbus/dbus-marshal.c: move byte swap stuff to header
(_dbus_pack_int32): uscore-prefix
(_dbus_unpack_int32): uscore-prefix
(_dbus_unpack_uint32): export
(_dbus_demarshal_string): add @todo complaining about use of
memcpy()
(_dbus_marshal_get_field_end_pos): add @todo about bad error
handling allowing corrupt data to go unchecked
* dbus/dbus-transport-unix.c (unix_do_iteration): add read/write
to the select() as needed for authentication. (should be using
_dbus_poll() not select, but for another day)
Anders Carlsson [Tue, 7 Jan 2003 22:22:39 +0000 (22:22 +0000)]
2003-01-08 Anders Carlsson <andersca@codefactory.se>
reviewed by: <delete if not using a buddy>
* dbus/dbus-internals.c: (_dbus_type_to_string):
New function that returns a string describing a type.
* dbus/dbus-internals.h:
* dbus/dbus-message.c: (dbus_message_append_fields),
(dbus_message_append_fields_valist), (dbus_message_get_fields),
(dbus_message_get_fields_valist), (_dbus_message_test):
* dbus/dbus-message.h:
Add new convenience functions for appending and getting message fields.
Also add a test for those.
* bus/connection.c: implement routines for handling connections,
first thing is keeping a list of owned services on each connection
and setting up watches etc.
* bus/services.c: implement a mapping from service names to lists
of connections
* dbus/dbus-hash.c: add DBUS_HASH_POINTER
* dbus/dbus-threads.c (dbus_static_mutex_lock): add functions
to use static mutexes for global data
* dbus/dbus-connection.c (dbus_connection_set_data): add new
collection of functions to set/get application-specific data
on the DBusConnection.
* 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
Anders Carlsson [Thu, 2 Jan 2003 10:09:46 +0000 (10:09 +0000)]
2003-01-02 Anders Carlsson <andersca@codefactory.se>
* dbus/dbus-marshal.c: (_dbus_marshal_utf8_string),
(_dbus_marshal_byte_array), (_dbus_demarshal_utf8_string),
(_dbus_marshal_test):
* dbus/dbus-marshal.h:
Add _dbus_marshal_byte_array and rename _dbus_marshal_string
to _dbus_marshal_utf8_string. Also fix some tests.
Harri Porten [Sat, 28 Dec 2002 09:10:43 +0000 (09:10 +0000)]
very basic check for Qt integration. Another proof that Qt's build
system needs more work for people using it.
I didn't want to copy all of KDEs autoconf magic so this is far from
perfect, yet. Can we use pkg-config here ?
Havoc Pennington [Fri, 27 Dec 2002 00:44:41 +0000 (00:44 +0000)]
2002-12-26 Havoc Pennington <hp@pobox.com>
* 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-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
Anders Carlsson [Wed, 25 Dec 2002 22:58:50 +0000 (22:58 +0000)]
2002-12-26 Anders Carlsson <andersca@codefactory.se>
* dbus/dbus-marshal.c: (_dbus_marshal_string),
(_dbus_demarshal_double), (_dbus_demarshal_int32),
(_dbus_demarshal_uint32), (_dbus_demarshal_string),
(_dbus_marshal_test):
* dbus/dbus-marshal.h:
Add string marshal functions and have the demarshal functions
return the new position.
Havoc Pennington [Wed, 25 Dec 2002 18:00:10 +0000 (18:00 +0000)]
2002-12-25 Havoc Pennington <hp@pobox.com>
* doc/dbus-sasl-profile.txt: docs on the authentication protocol,
it is a simple protocol that just maps directly to SASL.
* dbus/dbus-auth.h, dbus/dbus-auth.c: authentication protocol
initial implementation, not actually used yet.
* dbus/dbus-string.c (_dbus_string_find): new function
(_dbus_string_equal): new function
(_dbus_string_base64_encode): new function
(_dbus_string_base64_decode): new function