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Fixes #2324.
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This changes the UseDomains= setting of .network files to take an optional third value "route", in addition to the
boolean values. If set, the passed domain information is used for routing rules only, but not for the search path
logic.
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Previously, .network files only knew a vaguely defined "Domains=" concept, for which the documentation declared it was
the "DNS domain" for the network connection, without specifying what that means.
With this the Domains setting is reworked, so that there are now "routing" domains and "search" domains. The former are
to be used by resolved to route DNS request to specific network interfaces, the latter is to be used for searching
single-label hostnames with (in addition to being used for routing). Both settings are configured in the "Domains="
setting. Normal domain names listed in it are now considered search domains (for compatibility with existing setups),
while those prefixed with "~" are considered routing domains only. To route all lookups to a specific interface the
routing domain "." may be used, referring to the root domain. An alternative syntax for this is the "*", as was already
implemented before using the "wildcard" domain concept.
This commit adds proper parsers for this new logic, and exposes this via the sd-network API. This information is not
used by resolved yet, this will be added in a later commit.
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We have 126 broken links to sd-bus.html, it's nice to fix that.
Current version is mostly a stub, with a long list of links to other
pages. I think that's fine, especially that sd-bus might evolve
quite a bit before it is made public.
Not all of linked pages are written. Still missing:
sd_bus_can_send
sd_bus_get_name_creds
sd_bus_get_owner_creds
sd_bus_message_can_send
sd_bus_message_get_creds
sd_bus_message_set_allow_interactive_authorization
sd_bus_send
sd_bus_set_address
sd_bus_set_description
sd_bus_start
sd_event_set_prepare
sd-device
systemd.busname
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Noticed in pull request #2067.
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This also links up the new manpage from systemd-resolved.service(8), and makes a couple of unrelated additions.
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man: describe precedence of drop-in .conf files over unit files
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... to determine if color output should be enabled. If the variable is not set,
fall back to using on_tty(). Also, rewrite existing code to use
colors_enabled() where appropriate.
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Man page grammar and build tweaks v3
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- remove things which are clear from the context
- 0 is a valid descriptor number, hence "positive" → "non-negative"
- "positive" means greater than zero, hence "positive non-zero" → "positive"
- use oxford comma
- reword some things for clarity
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resolved: hide public mDNS configuration knobs for now
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Remove gcc warnings v2
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These bits were intenionally left out while mDNS is under development.
Remove the exposed knobs and man page entries again until this is settled.
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sd_event_now() is a public function, so we must check all
arguments for validity. Update man page and add tests.
Sample debug message:
Assertion 'IN_SET(clock, CLOCK_REALTIME, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC, CLOCK_BOOTTIME, CLOCK_BOOTTIME_ALARM)' failed at src/libsystemd/sd-event/sd-event.c:2719, function sd_event_now(). Ignoring.
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...because this is might not be obvious.
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Add machine-id setting
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Allow for overriding all other machine-ids which may be present on
the system using a kernel command line systemd.machine_id or
--machine-id= option.
This is especially useful for network booted systems where the
machine-id needs to be static, or for containers where a specific
machine-id is wanted.
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Let's increase compatibility with many private domains by default, and
ship a default NTA list of wel-known private domains, where it is
unlikely they will be deployed as official TLD anytime soon.
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non-DNSSEC mode for them
This adds logic to detect cases like the Fritz!Box routers which serve
a private DNS domain "fritz.box" under the TLD "box" that does not
exist in the root servers. If this is detected DNSSEC validation is
turned off for this private domain, thus improving compatibility with
such private DNS zones.
This should be fairly secure as we first rely on the proof that .box
does not exist before this logic is applied. Nevertheless the logic is
only enabled for DNSSEC=allow-downgrade mode.
This logic does not work for routers that set up a full DNS zone directly
under a non-existing TLD, as in that case we cannot prove
that the domain is truly non-existing according to the root servers.
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This adds a DNSSEC= setting to .network files, and makes resolved honour
them.
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After discussing this with Tom, we figured out "allow-downgrade" sounds
nicer.
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The option is already there, but wasn't exported in the configuration
file so far. Fix that.
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Add Seal option in the configuration file for journald-remote
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While journal received remotely can be sealed, it can only be done
on the command line using --seal, so for consistency, we will
also permit to set it in the configuration file.
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The current code is not compatible with current dkr protocols anyway,
and dkr has a different focus ("microservices") than nspawn anyway
("whole machine containers"), hence drop support for it, we cannot
reasonably keep this up to date, and it creates the impression we'd
actually care for the microservices usecase.
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GLIB has recently started to officially support the gcc cleanup
attribute in its public API, hence let's do the same for our APIs.
With this patch we'll define an xyz_unrefp() call for each public
xyz_unref() call, to make it easy to use inside a
__attribute__((cleanup())) expression. Then, all code is ported over to
make use of this.
The new calls are also documented in the man pages, with examples how to
use them (well, I only added docs where the _unref() call itself already
had docs, and the examples, only cover sd_bus_unrefp() and
sd_event_unrefp()).
This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we
tend to call our destructors these days.
Note that this defines no public macro that wraps gcc's attribute and
makes it easier to use. While I think it's our duty in the library to
make our stuff easy to use, I figure it's not our duty to make gcc's own
features easy to use on its own. Most likely, client code which wants to
make use of this should define its own:
#define _cleanup_(function) __attribute__((cleanup(function)))
Or similar, to make the gcc feature easier to use.
Making this logic public has the benefit that we can remove three header
files whose only purpose was to define these functions internally.
See #2008.
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core: allow 'SetUnitProperties()' to run on inactive units too
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core: rename Random* to RandomizedDelay*
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resolved. Fully implement search domains for single-label names
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The name RandomSec is too generic: "Sec" just specifies the default
unit type, and "Random" by itself is not enough. Rename to something
that should give the user general idea what the setting does without
looking at documentation.
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core: support <soft:hard> ranges for RLIMIT options
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