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libsystemd-network: add support for "Client FQDN" DHCP option (v2)
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add RandomSec= setting to timer units, and more
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sd-ndisc: drop packets from invalid source addresses
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This reverts commit 23f186494cf041107896fc4bd7fc5b8f921fd79f.
The bug has now been fixed, so we can go back to managing this ourselves.
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See https://tools.ietf.org/html/rfc4861#section-4.2. Some routers (dnsmasq) will send packets
from global addresses, which would break the default route setup, so ignore those.
This is also what the kernel does.
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network: fix indentation
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Previously, we'd always generate a packet on the wire, even for names
that are within our local zone. Shortcut this, and always check the
local zone first. This should minimize generated traffic and improve
security.
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Instead of taking a DnsQuestion object (i.e. an array of keys) only take
a single key. This simplifies things a bit, and as DNS/LLMNR require a
single question per query message was unnecessary anyway.
This mimics a similar change that was done a while ago for the dns cache
logic.
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This allows configuration of a random time on top of the elapse events,
in order to spread time events in a network evenly across a range.
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networkd: fixes
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Without this commit, we risk not picking up DNS addresses
as soon as they are available.
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There is still a bug in the userspace version, so temporarily revert this.
This is a work-around for issue #1866.
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man: remove section about syslog forwarding
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Calendarspec sub second v3
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socket: Add support for socket protcol
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Prepare for v228 release and bump version numbers.
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Fix transient timers and other fixes
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Now we don't support the socket protocol like
sctp and udplite .
This patch add a new config param
SocketProtocol: udplite/sctp
With this now we can configure the protocol as
udplite = IPPROTO_UDPLITE
sctp = IPPROTO_SCTP
Tested with nspawn:
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journald: turn ForwardToSyslog= off by default
After all, rsyslog and friends nowadays read their data directly from
the journal, hence the forwarding is unnecessary in most cases.
see 46b131574fdd7d77c15a0919ca9010c
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Previously, after a timer unit elapsed we'd leave it around for good,
which has the nice benefit that starting a timer that shall trigger at a
specific point in time multiple times will only result in one trigger
instead of possibly many. With this change a new option
RemainAfterElapse= is added. It defaults to "true", to mimic the old
behaviour. If set to "false" timer units will be unloaded after they
elapsed. This is specifically useful for transient timer units.
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We only reorder a few things and modernize some constructs. No
functional changes.
- Move some if checks from the caller to the callee of a few functions.
- Use IN_SE() where we can
- Move status printing functions together
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ID, fallback to random
Previously we used the process ID to generate transient unit names.
However, that is problematic as PIDs get reused easily, and applying
them to remote systems makes little sense.
Fortunately, each bus peer gets a unique, non-reusable ID assigned when
attaching to a bus, hence let's use that, if we can. In some cases we
cannot however, because we connect directly to PID's private socket, and
thus are not a proper bus peer with a unique ID. In that case generate a
random UUID to name the unit after.
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Let's reset more stuff that does not apply to transient units. Also,
let's readd the unito to all queues, because it's identity now changed.
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manager_load_unit() will dispatch the load queue anyway, but let's make
sure we also dispatch it immediately, after truning a unit into a
transient one and loading the properties from the message. That way the
know about the validity of the unit before we begin processing the next
auxiliary unit.
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Lets introduce unit_is_pristine() that verifies whether a unit is
suitable to become a transient unit, by checking that it is no
referenced yet and has no data on disk assigned.
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Let's move the validation checks into the loop that sets up the main and
auxiliary transient units, so that we can generate pretty error messages
for all units a transient unit transaction generates, not just for the
main unit.
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That way we'll get the PID on the host, rather than the one in a PID
namespace. Which should make the coredump handler less confusing.
Fixes #1930.
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networkd fixes
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networkd: ndisc timeout
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Don't block indefinitely, when control has been passed on from NDisc to DHCPv6.
In this case there is likely no IPv6 support on the local link, so otherwise
this would block indefinitely.
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This adds support for the Client Fully Qualified Domain Name (FQDN)
option [RFC 4702] to libsystemd-network. The option can be used to
exchange information about a DHCPv4 client's fully qualified domain
name and about responsibility for updating the DNS RR related to the
client's address assignment.
Other popular DHCP clients (dhclient, dhcpcd) support this option and
it would be useful to have it in networkd too.
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The function converts a domain name string to the wire format
described in RFC 1035 Section 3.1.
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This ensures that several DHCPv6 clients can run on separate interfaces
simultaneously.
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Fixes CID#1338680. Thanks to Thomas Andersen.
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We need to enable SO_REUSEADDR in order for several sockets to be allowed
to bind to the same port (even on different links).
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The ndisc client may trigger the dhcpv6 client to be started (this is the common case),
so we should allocate the dhcpv6 client whenever we allocate the ndisc one.
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