[Dnsmasq-discuss] dnsmasq sends DHCPNAK for address offered with DHCPOFFER

[Felix Schwarz]

Hi,

I just found another interesting thing in dnsmasq:
dnsmasq[5181]: DHCPDISCOVER(br-lan) 00:13:AA:BB:CC:DD
dnsmasq[5181]: DHCPOFFER(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD
dnsmasq[5181]: DHCPREQUEST(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD
dnsmasq[5181]: DHCPNAK(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD address reserved
dnsmasq[5181]: DHCPREQUEST(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD
dnsmasq[5181]: DHCPNAK(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD address reserved
dnsmasq[5181]: DHCPDISCOVER(br-lan) 00:13:AA:BB:CC:DD
dnsmasq[5181]: DHCPOFFER(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD
dnsmasq[5181]: DHCPREQUEST(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD
dnsmasq[5181]: DHCPNAK(br-lan) 192.168.0.5 00:13:AA:BB:CC:DD address reserved

As you can see, dnsmasq offers an IP address but when the client tries to use 
it, it gets an DHCPNAK...

The reason is another configuration error on my side:
/etc/ethers:
00:13:AA:BB:CC:DD 192.168.0.5
...
00:13:EE:FF:GG:HH 192.168.0.5
...

It would be nice if dnsmasq could detect such a situation and handle it more 
gracefully...

fs