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Otherwise if we have an A lookup that failed DNSSEC validation, but an
AAAA lookup that succeeded, we might end up using the A data, but we
really should not.
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This might happen in some cases (empty non-terminals...) and we should
not choke on it.
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It's weird doing bitwise operations on booleans. Let's use the boolean
XOR (i.e. "!=") instead of the bitweise XOR (i.e. "^") on them.
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Let's simplify usage and memory management of DnsResourceRecord's
dns_resource_record_to_string() call: cache the formatted string as
part of the object, and return it on subsequent calls, freeing it when
the DnsResourceRecord itself is freed.
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If there are multiple SOA RRs, and we look for a suitable one covering
our request, then make sure to pick the one that is furthest away from
the root name, not just the first one we encounter.
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entries
We use ANY RR keys to store NXDOMAIN information, but we previously
didn't flush out old ANY RR items in the cache when adding new entries.
Fix that.
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Let's abstract which RRs shall honour CNAMEs, and which ones should not.
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Add Seal option in the configuration file for journald-remote
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Closes #2223.
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LLDP type system name and system description should
be with in 255 characters and unique.
Let's add the validation to discard corrupt packets.
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analyze: verify verifies templates too
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core: re-sync bus name list after deserializing during daemon-reload
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When the daemon reloads, it doesn not actually give up its DBus connection,
as wrongly stated in an earlier commit. However, even though the bus
connection stays open, the daemon flushes out all its internal state.
Hence, if there is a NameOwnerChanged signal after the flush and before the
deserialization, it cannot be matched against any pending unit.
To fix this, rename bus_list_names() to manager_sync_bus_names() and call
it explicitly at the end of the daemon reload operation.
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Journal decompression fixes
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A socket shouldn't be used after socket_done() returns, but follow the
general guideline here and avoid dangling pointers anyway.
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Plug a small memory leak.
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core: fix bus name synchronization after daemon-reload
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Printing the pointer variable really doesn't help, so drop that.
Instead, add a string lookup table for the EventSourceType enum, and print
the type of event source in case of errors.
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During daemon-reload, PID1 temporarly loses its DBus connection, so there's
a small window in which all signals sent by dbus-daemon are lost.
This is a problem, since we rely on the NameOwnerChanged signals in order to
consider a service with Type=dbus fully started or terminated, respectively.
In order to fix this, a rewrite of bus_list_names() is necessary. We used
to walk the current list of names on the bus, and blindly triggered the
bus_name_owner_change() callback on each service, providing the actual name
as current owner. This implementation has a number of problems:
* We cannot detect if the the name was moved from one owner to the other
while we were reloading
* We don't notify services which missed the name loss signal
* Providing the actual name as current owner is a hack, as the comment also
admits.
To fix this, this patch carries the following changes:
* Track the name of the current bus name owner, and (de-)serialize it
during reload. This way, we can detect changes.
* In bus_list_names(), walk the list of bus names we're interested in
first, and then see if the name is active on the bus. If it is,
check it it's still the same as it used to be, and synthesize
NameOwnerChanged signals for the name add and/or loss.
This should fully synchronize the current name list with the internal
state of all services.
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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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Add DNSSEC proof of unsignedness and NSEC3 proof
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method_schedule_shutdown referenced org.freedesktop.login1.poweroff*
which is never registered in polkit.
Now refers to org.freedesktop.login1.power-off*
Signed-off-by: Joost Bremmer <toost.b@gmail.com>
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Let's make sure we propagate the DNSSEC validation status from an
auxiliary DNSSEC transaction back to the originating transaction, to
improve the error messages we generate.
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the the bus client
It's useful to generate useful errors, so let's do that.
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We have many types of failure for a transaction, and
DNS_TRANSACTION_FAILURE was just one specific one of them, if the server
responded with a non-zero RCODE. Hence let's rename this, to indicate
which kind of failure this actually refers to.
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In most of the other call, we called similar functions that remove the
data structure link-ups to other objects "unlink", hence we should here,
too.
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Given that we already have dns_cache_remove_by_rr() this makes clearer
what the operation actually does.
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This is not used anywhere, but it's extremely useful when debugging.
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This adds a new DnsAnswer item flag "DNS_ANSWER_SHARED_OWNER" which is
set for mDNS RRs that lack the cache-flush bit. The cache-flush bit is
removed from the DnsResourceRecord object in favour of this.
This also splits out the code that removes previous entries when adding
new positive ones into a new separate call dns_cache_remove_previous().
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After all we want to allow NULL DnsAnswer objects as equivalent to empty
ones, hence we should use the right checks everywhere.
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Make sure the cache never altes the authenticated bit of RRs stored in
it, and drops it for RRs when passing it out again.
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OPT RRs after all use the class field for other purposes than actually
encoding a class, hence the cache flush bit doesn't apply really.
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Let's use dns_cache_remove() rather than
dns_cache_item_remove_and_free() to destroy the cache, since the former
requires far fewer hash table lookups.
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When we receieve a TTL=0 RR, then let's only flush that specific RR and
not the whole RRset.
On mDNS with RRsets that a shared-owner this is how specific RRs are
removed from the set, hence support this. And on non-mDNS the whole
RRset will already be removed much earlier in dns_cache_put() hence
there's no reason remove it again.
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We should never use the TTL of an unauthenticated SOA to cache an
authenticated RR.
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We call it anyway as one of the first calls in dns_cache_put(), hence
there's no reason to do this multiple times.
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Let's keep entries for longer and more of them. After all, due to the
DNSSEC hookup the amount of RRs we need to store is much higher now.
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Let's make DNS class helpers more like DNS type helpers, let's move them
from resolved-dns-rr.[ch] into dns-type.[ch].
This also adds two new calls dns_class_is_pseudo() and
dns_class_is_valid_rr() which operate similar to dns_type_is_pseudo()
and dns_type_is_valid_rr() but for classes instead of types.
This should hopefully make handling of DNS classes and DNS types more
alike.
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