Device:getDefaultRoute parses /proc/net/route and converts the hex
addresses to textual IP addresses, but in `isOnline` we don't care what
address the gateway actually has, we only care about whether we have a
default route into the Internet.
This provides a simpler alternative that does the equivalent of
"ip route get 203.0.113.1 || ip route get 2001:db8::1" (note that it
does support IPv6-only connectivity as opposed to
Device:getDefaultRoute) and returns true if we have a route.
Inspired by https://github.com/pavel-odintsov/get_default_outgoing_ip_linux
reviewable/pr11639/r1
Tomas Janousek2 months agocommitted byFrans de Jonge