Pathological autobuilder environments might not list localhost in
/etc/hosts.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106812
(cherry picked from commit 4cfc7de30d)
Minimal autobuilder environments don't always have working TCP,
so we may need to skip TCP tests. Make sure we test the equivalent
code paths via Unix sockets in those environments.
One notable exception is test/fdpass.c, which uses TCP as a transport
that is known not to be able to carry Unix fds; this needs to continue
to use TCP.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106812
(cherry picked from commit cb7dd5bfcc)
This expands test coverage, and lets us reuse the test for other
address schemes.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106812
(cherry picked from commit b19c9e2f26)
getaddrinfo and getnameinfo have their own error-handling convention
in which the library call returns either 0 or an EAI_* error code
unrelated to errno. If the error code is not EAI_SYSTEM, then
the value of errno is undefined (in particular it might be carried
over from a previous system call or library call). Introduce a
new helper function _dbus_error_from_gai() to handle this.
The equivalent code paths in Windows appear to be OK: the Windows
implementation of getaddrinfo() is documented to return a Winsock
error code, which we seem to be handling correctly.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106395
(cherry picked from commit 60cedd0cfd)
Otherwise, distcheck fails when mallard-ducktype is available.
Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit 9391d769ae)
This might (?) have made sense behind a firewall in 2003; but now it's
2018, the typical threat model that we are defending against has
changed from "vandals want to feel proud of their l33t skills"
to "organised crime wants your money", and a "trusted" local LAN
probably contains an obsolete phone, tablet, games console or
Internet-of-Things-enabled toaster with remote root exploits.
This make network topologies that used to be acceptable look
increasingly irresponsible.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106004
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
(cherry picked from commit d0a16b59a8)
This is the default, and blocks TCP-based attacks by making the
attacker fail to authenticate (while also preventing inadvisable
TCP-based configurations from working).
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106004
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Ralf Habacker <ralf.habacker@freenet.de>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
(cherry picked from commit aef4475939)
I'm far from convinced that this option should even *exist*, but it
should definitely be documented as a very bad thing.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106004
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Ralf Habacker <ralf.habacker@freenet.de>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
(cherry picked from commit 5d36804867)
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106004
Reviewed-by: Ralf Habacker <ralf.habacker@freenet.de>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
[smcv: Add a TODO comment as suggested]
Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit cf47380641)
With some fairly reasonable threat models (active or passive local
attacker able to eavesdrop on the network link, confidential
information being transferred via D-Bus), secure authentication is
insufficient to make this transport secure: it does not protect
confidentiality or integrity either.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106004
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Ralf Habacker <ralf.habacker@freenet.de>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
(cherry picked from commit 2513f84db6)
The old version-1 format is deprecated and now produces warnings.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106186
Reviewed-by: Philip Withnall <withnall@endlessm.com>
[smcv: Add the .devhelp2 file to .gitignore as suggested]
Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit fa92263920)
The tutorial is not necessarily a great entry point for the libdbus
documentation: it's infrequently updated, and we should probably have
the "If you use this low-level API directly, you're signing up for some
pain" message from the API reference show up in devhelp more immediately.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106186
Reviewed-by: Philip Withnall <withnall@endlessm.com>
[smcv: Add longer commit message with rationale]
Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit c84ac8b1ef)
Newer versions of yelp-build use this instead of a jQuery syntax
highlighter.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106171
Reviewed-by: Philip Withnall <withnall@endlessm.com>
[smcv: Also add it to .gitignore as suggested]
Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit 49ad5b110f)
This gives us feature parity with the Autotools build system for this
particular area, and in particular means a system dbus-daemon built
with cmake can expand its fd limit.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=105165
(cherry picked from commit a146724f2f)
Startup ordering was changed in #92832 to ensure that SELinux audit
messages could be sent. As a side effect, the raising of file descriptor
limits was moved to after the dropping of root privileges, resulting in
the limit change always failing.
Move the raise_file_descriptor_limit() call to ensure that it is called
before dropping root privileges.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=105165
Bug-RedHat: https://bugzilla.redhat.com/show_bug.cgi?id=1529044
[smcv: Call raise_file_descriptor_limit() even if !context->user]
Reviewed-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit 6e42964f5f)
Based on code contributed by Manish Narang. This is not included in the
automated test suite, because it isn't reliable on heavily-loaded
automatic test infrastructure like Travis-CI.
Reviewed-by: Philip Withnall <withnall@endlessm.com>
[smcv: Add the test to the CMake build system too, as requested]
[smcv: Convert into a manual test]
Signed-off-by: Simon McVittie <smcv@collabora.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=102839
(cherry picked from commit 0b1e292860)
This will be used in tests later in the branch.
Sadly we can't use GLIB_VERSION_2_44 unless we are willing to have a
hard dependency on GLib 2.44, which would force us to do all our
Travis-CI builds in Docker containers rather than in ye olde base
system, and that adds 50% to the time taken to do builds.
Reviewed-by: Philip Withnall <withnall@endlessm.com>
[smcv: Rebase onto 1.13.x branch, fix minor conflicts]
Signed-off-by: Simon McVittie <smcv@collabora.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=101354
(cherry picked from commit d5742550ca)
The regular expression previously used here to select the second
comma-delimited argument won't work when we introduce an argument
containing a comma, which I need to do now. We can address this by
recognising Autoconf's quoting mechanism (which uses square
brackets).
This is not 100% right (it doesn't understand nested square brackets),
but it's good enough in practice.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Acked-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=101354
(cherry picked from commit 83b439f7b4)
Tests that brute-force OOM code paths can be rather slow.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=100317
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit 5c91d85f3e)
DBusLoop isn't thread-safe, so we can't use it to test multi-threaded
situations.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=102839
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
(cherry picked from commit f127c8e110)
[smcv: Adjust for older codebase]
If one thread is blocking on a pending call, and another thread is
dispatching the connection, then we need them to agree on the value
of the completed flag by protecting all accesses with a lock. Reads
for this member seem to have the connection lock already, so it's
sufficient to make sure that the only write also happens under the
connection lock.
We already set the completed flag before calling the callback, so it
seems OK to stretch it to meaning that some thread has merely *taken
responsibility for* calling the callback.
The completed flag shares a bitfield with timeout_added, but that
flag is protected by the connection lock already.
Based on suggestions from Simon McVittie on
<https://bugs.freedesktop.org/show_bug.cgi?id=102839>.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=102839
[smcv: Revert indentation changes; add commit message]
Reviewed-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit d3e03eb50e)
If a pending call is provided, _dbus_connection_do_iteration_unlocked
checks whether it has completed or has a reply ready as soon as it
acquires the I/O path. If that's the case, then the iteration
terminates without trying to carry out I/O, so that the pending call
can be dispatched immediately, without blocking until a timeout is
reached. This change is believed to be necessary, but not sufficient,
to resolve#102839.
Based on part of a patch from Michael Searle on
<https://bugs.freedesktop.org/show_bug.cgi?id=102839>.
Commit message added by Simon McVittie.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=102839
Reviewed-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit 30f8a38b3c)
This snippet was already attempting to create /var/lib/dbus/machine-id,
but would fail on volatile or stateless systems where /var/lib/dbus/
did not already exist. systemd-tmpfiles automatically creates parent
directories for tmpfiles of type 'd', 'D', etc., but not for files
or symlinks (https://github.com/systemd/systemd/issues/7853).
Signed-off-by: Chris Lesiak <chris.lesiak@licor.com>
[smcv: Extended commit message to clarify why we need this]
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=104577
Reviewed-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit aeebf801f1)
Commit 0c03b505 was meant to clear all the fds indexed by j in
[0, n_fds), which socket_disconnect() can't be allowed to close
(because on failure the caller remains responsible for closing them);
but instead it closed the one we failed to add to the main loop
(fd i), repeatedly.
Similarly, it was meant to invalidate all the watches indexed by j
in [i, n_fds) (the one we failed to add to the main loop and the ones
we didn't try to add to the main loop yet), which socket_disconnect()
can't be allowed to see (because it would fail to remove them from
the main loop and hit an assertion failure); but instead it invalidated
fd i, repeatedly.
These happen to be the same thing if you only have one fd, resulting
in the test-case passing on an IPv4-only system, but failing on a
system with both IPv4 and IPv6.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=89104
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
(cherry picked from commit c9aa00ce73)
This also covers _dbus_server_new_for_socket(), which is one of the
worse places in terms of complexity of the error-unwinding path
(3 labels).
Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=89104
(cherry picked from commit ac6c4d384d)
