Re: bridge(4) - feedback local packets into ether_input()

[Roy Marples <roy%marples.name@localhost>]

On 22/04/2016 10:36, Ryota Ozaki wrote:
> BTW with the change can we write ATF tests of dhcpcd without interfering
> the host (or with minimum affects)?

You kind of could anyway with ISC dhcpd because it listens and sends via
BPF which worked for this anyway. This patch feeds it back into our
stack so any program can open a PF_INET/SOCK_DGRAM and listen to it
normally, like dnsmasq does.

You would need to setup an ip range on tap0 to serve DHCP from.
Then dhcpcd can run happily on tap1 and test everything with the
following notes

  *  dhcpcd should be instructed not to install any default routes (-G)
  *  dhcpcd should run a custom dhcpcd-run-hooks(8) script

There are commandline options for both of these, and also in dhcpcd.conf
You can then write ATF tests to observe addreses and routes installed
and for the variables set for dhcpcd-run-hooks.

Roy