Question, is index 0 always default interface?

[7c]

given this example:

var data = await getInterfaces()
        names = Object.keys(data);
        console.log(os.networkInterfaces()[names[0]]);

is the interface with index 0 always the default route interface?

[mh61503891]

Thank you for your question.

is the interface with index 0 always the default route interface?

No. The order of names depends on a result of a command such as netstat -r -A inet. This library collects default-gateways form multiple network interfaces.

[7c]

i have a linux ubuntu 16.04 with 2.6.32 kernel and output of netstat is:

$:netstat -rn -A inet
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         0.0.0.0         0.0.0.0         U         0 0          0 venet0

based on

getDefaultNetworkByInet4 = (callback) ->
  getDefaultNetwork "netstat -rn -A inet | awk '$4~/UG/ {print $2,$8;}'",
    (error, data) ->
      callback(error, data)

you require a G flag in netstat. This approach worked until i have seen this 2.6.32 host