[Dnsmasq-discuss] in tftp-server DHCP option not replaced with server address

Chen-Yu Tsai wens at cloudmosa.com
Tue Sep 6 07:55:42 BST 2016


I'm running dnsmasq 2.68 (sigh) on Ubuntu 14.04.5 as part of
a server & network equipment bootstrap & orchestration setup.

Our network equipment supports auto-configuration through DHCP,
using the next-server/tftp-server & bootfile options. The manpage
states """The special address (or [::] for DHCPv6) is taken
to mean "the address of the machine running  dnsmasq".""" However
that does not seem to be the case with the tftp-server option.

It seems that tftp-server is a special case, being a boot option
and also a "name" option field, rather than an IP address. Either
this should be fixed, or an exception should be added to the manpage
section on dhcp-option.

A workaround is to not use the tftp-server, and only use the
next-server field in the response, which dnsmasq always defaults
to the local server address. I think this bit also deserves some
mention in the manpage.


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