specification: discuss "listenable" and "connectable" addresses

The --with-dbus-session-bus-connect-address configure option and the
DBUS_SESSION_BUS_CONNECT_ADDRESS CMake variable expect a connectable
address, while the --with-dbus-session-bus-listen-address option and
the DBUS_SESSION_BUS_LISTEN_ADDRESS variable expect a listenable address.

DBUS_SYSTEM_BUS_DEFAULT_ADDRESS currently has to be an address that
is simultaneously listenable and connectable.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=61303
Reviewed-by: Chengwei Yang <chengwei.yang@intel.com>
[fixed name of DBUS_SESSION_BUS_CONNECT_ADDRESS as per review -smcv]
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
_dbus_check_dir_is_private_to_user: check that we own it

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=61303
Reviewed-by: Chengwei Yang <chengwei.yang@intel.com>
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Reload policy rules for completed connections

The message bus which can monitor its conf dirs for changes and reload
confs immediately if dir monitor enabled, for example, inotify in Linux,
kqueue in *BSD.

However, it doesn't apply policy rules change for completed connections,
so to apply policy rules change, the client connection has to disconnect
first and then re-connect to message bus.

For imcomplete connections, it always has the latest review of policy
rules.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=39463
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Make sure tests run with a temporary XDG_RUNTIME_DIR

We don't want the regression tests' "session" getting mixed up in
system-wide "sessions". This doesn't actually matter yet, but it is
likely to matter in future.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=61301
Reviewed-by: Chengwei Yang <chengwei.yang@intel.com>
[merged with earlier line-wrapping of TESTS_ENVIRONMENT -smcv]
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
kqueue: replace tab with space

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=69332
[altered commit message to not say it fixes memory leaks -smcv]
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Fix memory leak for kqueue: shutdown kqueue correctly

There are memory blocks leak when doing bus-test, both dispatch-sha1 and
dispatch test cases complain memory blocks leak.

This patch also fix fd leaks.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=69332
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
If sendmsg() with SCM_CREDS fails with EINVAL, retry with send()

Perhaps some OSs accept and ignore attempts to send a SCM_CREDS
message on a non-Unix socket, but GNU/kFreeBSD doesn't (and presumably
FreeBSD doesn't either).

Based on a patch by Svante Signell.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=69492
Tested-by: Svante Signell
Reviewed-by: Chengwei Yang <chengwei.yang@intel.com>
_dbus_read_credentials_socket: look at all cmsg headers, not just the first

If there are no cmsg headers, don't fail: this fixes receiving credentials
on TCP sockets under at least GNU/kFreeBSD, and probably FreeBSD too.

If there's more than one cmsg header, ignore any that don't look like
valid SCM_CREDS.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=69492
Tested-by: Svante Signell
Reviewed-by: Chengwei Yang <chengwei.yang@intel.com>
[added break, altered indentation in response to review -smcv]
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
_dbus_listen_unix_socket: don't try to set SO_REUSEADDR

On Hurd, the setsockopt() fails. Svante Signell confirmed that on
at least Linux and kFreeBSD, SO_REUSEADDR "succeeds" on Unix sockets,
but doesn't have any practical effect; so rather than making the
failure not issue a warning, we might as well not bother with the
syscall at all.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=69492
Reviewed-by: Chengwei Yang <chengwei.yang@intel.com>
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
_dbus_auth_return_buffer(): remove unused argument

The argument bytes_read of _dbus_auth_return_buffer() function isn't
used at all, so remove it.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=71477
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
BusTransaction: remove confusing getter of connections

There is a DBusList* member of BusTransaction named "connections", while
its getter function bus_transaction_get_connections() returns
context->connections which in fact is a BusConnections pointer, this is
quite confusing. Because this is what bus_context_get_connections()
returns.

This patch call out to bus_context_get_connections() directly and remove
the then unused bus_transaction_get_connections().

https://bugs.freedesktop.org/show_bug.cgi?id=71597
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
kqueue: open watched directories with close-on-exec flag

[FreeBSD and OpenBSD contributors clarified that O_CLOEXEC has been
supported for ~ 2 years on both, so for the moment we're assuming
that every platform with kqueue also has working O_CLOEXEC. Please reopen
the bug, with a tested patch that uses _dbus_fd_set_close_on_exec() instead,
if this assumption turns out to be false. -smcv]

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=72213
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Ensure DBusError is set if _dbus_read_nonce() fail

In _dbus_send_nonce() which call in _dbus_read_nonce() and assert on an
error is set if _dbus_read_nonce() fail. However, in _dbus_read_nonce(),
it may fail on fopen() and left error is unset. This will crash us if
assertions hasn't been disabled.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=72298
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
DBus Spec: replace tab with 8 spaces

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=72301
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
DBus Spec: add document of bind for tcp/nonce-tcp transport

tcp/nonce-tcp transport has a "bind" key, which can be specified a
hostname and will override hostname specified in "host" key.

"bind" has a special value "*" which means ip address 0.0.0.0 and will
cause dbus-daemon listen on all interfaces.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=72301
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
dbus-daemon(1): align document about "bind" with DBus Spec

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=72301
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Define WIN32_LEAN_AND_MEAN in Windows port

<windows.h> somewhat cloyingly attempts to include <winsock.h>
by default, which causes problems if the rest of the program
is trying to use the incompatible <winsock2.h>.  The Windows
sysdep header attempts to prevent this by forcibly defining
the winsock header guard macro, so that it will not be included.
However, this does not work on MinGW because it uses a different
guard macro name.

This patch changes the code to instead define WIN32_LEAN_AND_MEAN,
which is a more portable way to ensure that <winsock.h> will not
be included.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=71405
Reviewed-By: Ralf Habacker <ralf.habacker@freenet.de>
Merge remote-tracking branch 'origin/master'
Do not install systemd unit files if build without systemd

If dbus buid without systemd (--disable-systemd or no systemd libs
available when building), we expect not to install dbus systemd unit
files because they're only for systemd environment.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=71818
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
1.7.10