Age | Commit message (Collapse) | Author |
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This fixes a regression introduced in e5002702.
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We want to reuse these functions for the server library too.
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Split the recevie_message callback into _raw and _udp parts and a generic
DHCPMessage handler.
Also always verify the xid/MAC, rather than only for udp messages.
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Some DHCP servers will not work correctly if secs == 0, so round up
to at least 1.
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This allows us users of the library to keep copies of old leases. This is
used by networkd to know what addresses to drop (if any) when the lease
expires.
In the future this may be used by DNAv4 and sd-dhcp-server.
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Compute the 'secs' field as seconds since start of lease acquisition
procedure. Start off with a value of zero and increase it only for
each resent DHCP discover message. See the discussion before and
after http://www.ietf.org/mail-archive/web/dhcwg/current/msg05836.html
and Section 3.1 of RFC 2131.
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Go back to Init state independent of the current state the client
is in.
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A checksum field with value zero means no UDP checksum has been
computed for the packet.
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This was originally included in the dhcp-client at my request, but it is not
really dhcp-specific and useful outside of it, so let's pull it out.
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Unlike the other merged libs, the rest of libsystemd will never depend on
sd-dhcp-client, so there is no reason not to keep it separate.
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