[Bug 11891] The DHCP-client in RENEWING state does not reply to broadcast messages

bugzilla at busybox.net bugzilla at busybox.net
Thu May 23 13:24:50 UTC 2019


--- Comment #1 from Denys Vlasenko <vda.linux at googlemail.com> ---
(In reply to Krzysztof Charusta from comment #0)
> Would it be reasonable to think that the client should listen to broadcast in RENEWING state as well?

Well, no. My understanding is the whole point why RENEWING
state exists instead of all clients just go back to bcast
REBINDING, is to avoid using bcast / perusing all packets,
instead of only those packets sent to our IP:PORT.

Compare udhcp_recv_raw_packet() and udhcp_recv_kernel_packet().
Raw receive sees way more packets.

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