netifaces.gateways()['default'] picks the interface with the highest metric

[maxadamo]

IP route is showing that tun0 (my VPN) has the lowest metric:

$  ip route list | grep default
default via 10.100.24.1 dev tun0 proto static metric 50 
default via 192.168.1.1 dev wlp3s0 proto dhcp metric 600 

but netifaces is saying that my WiFi is the default interface:

netifaces.gateways()['default']
{2: ('192.168.1.1', 'wlp3s0')}

[yuri-sevatz]

So there's a few things going on here...

1. Some routes are created with no destination, that is non-null, but still all 0's (e.g. openvpn in some cases!)

--> I have a PR that addresses this here: #71

2. Some routes are created with no metric, that is inferred to be 0 (e.g. no metric data from PF_NETLINK)

--> I've just added support for this in the same branch from the above PR.