On 11/05/2017 14:36, Simon Kelley wrote: > The design is that dnsmasq sends the options expected by a PXE client if > it's acting as a proxy (because the whole proxy thing is part of the PXE > spec: a normal DHCP client doesn't know how to deal with it.) The > replies to the PXE client are constructed using the information given in > the pxe-service and pxe-prompt options. The inclusion of arbitrary > vendor-specific options is an oversight, I think. > > As the PXE-spec doesn't AFAIK, include root-path as an expected option, > I'm not sure that sending it will have any effect. > > As stated in the thread you link to, if you're netbooting an OS via PXE > then one the OS starts, it will do DHCP again, and that's the time to > send arbitrary options. > > TL;DR I don't think implementing what you're asking for will achieve > what you want, but if you can demonstrate that it will, then I'll > certainly looking at adding the extra function.
Simon, thank you very much for reply. My reason for wanting that feature is to support a scenario where is a main DHCP server that is tasked only with giving out network information and which I can not modify at all. In my opinion options like root-path, swap-server and similar belong to the same league as, say, bootfile-name rather than, say, dns-server or router. In either case, my main DHCP server is not configured to advertise root-path. Also, in my case it is the OS that wants to get root-path not the first stage PXE loader. So, without dnsmasq allowing me to send root-path option there is no way I can give it to the OS. I thought that the purpose of the proxy mode was exactly to help with PXE / OS booting in situations where the main DHCP server can not be altered to do that job. Having said all of the above, I should admit that the OS in question could be non-compliant with the PXE specification. Maybe it should use a different mechanism like vendor options or a configuration file (advertised via bootfile-name) to get the information it needs. -- Andriy Gapon _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
