FATAL: NDP poisoning failed to start

[marcoroda]

Hello,

I am using ettercap on a dual stack spoofing environment and while testing only NDP spoofing I faced the following issue:
Note: This issue is not present when in ettercap GUI mode.

How to reproduce:

Run ettercap as follwoing:

ettercap -i <network_interface> -T -o -z -j /tmp/fork_ettercap_network.txt -M ndp /// //<IPv6_HomeRouter_LinkLocal>/

My target list file for testing:
Just have the home router IPv4 and IPv6 gateways and my Phone's IPv4.

192.168.88.1 **:B2:DC:5B:**:06 -
192.168.88.62 **:A2:EA:92:**:96 -
fe80::****:eaff:fe92:**** **:A2:EA:92:**:96 -

Then I get:

Loading hosts list from file /tmp/fork_ettercap_network.txt
3 hosts added to the hosts list...

FATAL: NDP poisoning failed to start

This happens because, if I am not mistaken, when using ettercap from the command line and explicitly providing a hostfile, the if located in line 94 of src/mitm/ec_ip6nd_poison.c is not testing for when we provide a hostfile like ec_arp_poisoning.c is.

I managed to fix it and would be glad to create a PR to fix this. ;)

Thanks for the project, keep up the good work.
Marco Roda