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The DHCP RFC does not require the DHCP server to send a subnet mask, so if it
is missing, let's try to use the default subnet masks based on address class.
In case the class the address belongs to does not have a default subnet mask,
we fail as before.
Also improve logging when handling invalid dhcp messages, and simply ignore them
rather than stop the whole dhcp client.
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Accept any lease lifetime greater than one second. Server should not
hand out extremely short leases, but let's not be the ones to fail.
Do not fail when arming a timer in the past, but also only arm one such
timer.
Avoid rounding errors when computing the default timeouts, this may be
an issue if we are handed a very short lease.
Also, don't pass 'time_now' around, as that can be found in the event
object when needed.
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https://bugs.freedesktop.org/show_bug.cgi?id=76335
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Make sure the client objects exist for the lifetime of the Link.
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Pass the mac address on to ipv4ll and dhcp clients so they always have
up-to-date information, and may react appropriately to the change.
Also drop setting the mac address from uevent, and only log when the
address actually changes.
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Also keep start_time in sync, but that shouldn't matter.
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The value is stored in the client object, so get it there when needed.
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Check that the client identifier is formatted as suggested in the
RFC and that the messages sent ends with an end option.
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Since the length used by options is known, send packets with no
extra padding.
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Even though client identifiers SHOULD be treated as opaque objects by
DHCP servers, follow the recommendation of a hardware type field with
value 0x01 (ethernet) followed by the hardware address as described in
RFC 2132.
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Keep mounts done by udev rules private to udevd. Also, document how
MountFlags= may be used for this.
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this is useful
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A service with PrivateNetwork= cannot access abstract namespace sockets
of the host anymore, hence let's better not use abstract namespace
sockets for this, since we want to make sure that PrivateNetwork=
is useful and doesn't break sd_notify().
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if PrivateDevices=yes is used we need to make sure we can still
create /dev/null and so on.
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A terminated connection is a runtime error and not a developer mistake,
hence don't use assert_return() to check for it.
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Let's automatically initialize the kill, exec and cgroup contexts of the
various unit types when the object is constructed, instead of
invididually in type-specific code.
Also, when PrivateDevices= is set, set DevicePolicy= to closed.
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and /var/tmp are mounted
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long-running daemons
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Also mount /dev/kdbus, /dev/mqueue and /dev/hugepages into the /dev for
namespaced services.
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Otherwise we would fail with -EINVAL. Thanks to Brandon Philips
<brandon.philips@coreos.com>, for reporting the bug.
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Init-Reboot is tried if a client IP address has been given when
the DHCP client is started. In Init-Reboot, start by sending a
broadcast DHCP Request including the supplied client IP address
but without the server identifier. After sending the request,
enter Reboot state.
If a DHCP Ack is received, proceed to Bound state as usual. If a
DHCP Nak is received or the first timeout triggers, start the
address acquisition over from DHCP Init state.
See RFC 2131, sections 4.3.2, 4.4, 4.4.1 and 4.4.2 for details.
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This causes the DHCP client struct initialization and DHCP client
starting to be factored out into functions of their own.
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Remove identical checksum function implementation from the test
case code.
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Add a new config 'Activating' directive which denotes whether a busname
is actually registered on the bus. It defaults to 'yes'.
If set to 'no', the .busname unit only uploads policy, which will remain
active as long as the unit is running.
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messages queued for it
This way we can be sure that the service the messages are ultimately
intended for finds all fields it might need.
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https://bugs.freedesktop.org/show_bug.cgi?id=76335
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number of fixed strings
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negotiate it, refuse to take it
This makes sure we don't mishandle if developers specificy a different
AcceptFileDescriptors= setting in .busname units then they set for the
bus connection in the activated program.
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AcceptFD= defaults to true, thus making sure that by default fd passing
is enabled for all activatable names. Since for normal bus connections
fd passing is enabled too by default this makes sure fd passing works
correctly regardless whether a service is already activated or not.
Making this configurable on both busname units and in bus connections is
messy, but unavoidable since busnames are established and may queue
messages before the connection feature negotiation is done by the
service eventually activated. Conversely, feature negotiation on bus
connections takes place before the connection acquires its names.
Of course, this means developers really should make sure to keep the
settings in .busname units in sync with what they later intend to
negotiate.
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