#!/bin/sh
# vim: set noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 :
INTERFACE="$1"

echo "Select best test server..."
HOSTLST="http://speedtest.frankfurt.linode.com/garbage.php?ckSize=10000 http://speedtest.tokyo2.linode.com/garbage.php?ckSize=10000 http://speedtest.singapore.linode.com/garbage.php?ckSize=10000 http://speedtest.newark.linode.com/garbage.php?ckSize=10000 http://speedtest.atlanta.linode.com/garbage.php?ckSize=10000 http://speedtest.dallas.linode.com/garbage.php?ckSize=10000 http://speedtest.fremont.linode.com/garbage.php?ckSize=10000 http://speedtest.tele2.net/1000GB.zip http://www.ovh.net/files/10Gb.dat https://speed.hetzner.de/10GB.bin http://ipv4.bouygues.testdebit.info/10G.iso http://par.download.datapacket.com/10000mb.bin http://nyc.download.datapacket.com/10000mb.bin http://ams.download.datapacket.com/10000mb.bin http://fra.download.datapacket.com/10000mb.bin http://lon.download.datapacket.com/10000mb.bin http://mad.download.datapacket.com/10000mb.bin http://prg.download.datapacket.com/10000mb.bin http://sto.download.datapacket.com/10000mb.bin http://vie.download.datapacket.com/10000mb.bin http://war.download.datapacket.com/10000mb.bin http://atl.download.datapacket.com/10000mb.bin http://chi.download.datapacket.com/10000mb.bin http://lax.download.datapacket.com/10000mb.bin http://mia.download.datapacket.com/10000mb.bin http://nyc.download.datapacket.com/10000mb.bin"
bestping="999"
for pinghost in $HOSTLST; do
	domain=$(echo $pinghost | awk -F/ '{print $3}')
	if [ -z "$INTERFACE" ]; then
		ping=$(ping -c1 -w2 $domain | cut -d "/" -s -f5 | cut -d "." -f1)
	else
		ping=$(ping -c1 -w2 -I $INTERFACE -B $domain | cut -d "/" -s -f5 | cut -d "." -f1)
	fi
	echo "host: $domain - ping: $ping"
	if [ -n "$ping" ] && [ "$ping" -lt "$bestping" ]; then
		bestping=$ping
		HOST=$pinghost
	fi
done

[ -z "$HOST" ] && HOST="http://proof.ovh.net/files/10Gio.dat"

echo "Best server is $HOST, running test:"
trap : HUP INT TERM
if [ -z "$INTERFACE" ]; then
	curl -6 $HOST >/dev/null || echo
else
	domain=$(echo $HOST | awk -F/ '{print $3}')
	hostip=$(dig +nocmd +noall +answer AAAA $domain | grep -v CNAME | awk '{print $5}' | tr -d "\n")
	ipset add ss_rules6_dst_bypass_all $hostip
	curl -6 --interface $INTERFACE $HOST >/dev/null || echo
	ipset del ss_rules6_dst_bypass_all $hostip
fi