#!/bin/sh
# vim: set noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 :
HETZNER=false
if [ "$1" = "hetzner" ]; then
	HETZNER=true
	INTERFACE="$2"
else
	INTERFACE="$1"
fi

[ -n "$INTERFACE" ] && [ ! -d "/sys/class/net/$INTERFACE" ] && {
	echo "You must use a real interface. You wan find them using 'ip a' for example"
	exit 0
}

if [ "$HETZNER" = false ]; then
	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 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="9999"
	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
fi

[ -z "$HOST" ] && HOST="https://speed.hetzner.de/10GB.bin"

echo "Best server is $HOST, running test:"
trap : HUP INT TERM
if [ -z "$INTERFACE" ]; then
	curl -4 -o /dev/null $HOST || echo
else
	domain=$(echo $HOST | awk -F/ '{print $3}')
	hostip=$(dig +nocmd +noall +answer A $domain | grep -v CNAME | awk '{print $5}' | tr '\n' ' ')
	if [ -n "$(ipset list 2>/dev/null | grep ss_rules)" ]; then
		for ip in $hostip; do
			ipset add ss_rules_dst_bypass_all $ip
		done
	fi
	curl -4 -o /dev/null --interface $INTERFACE $HOST || echo
	if [ -n "$(ipset list 2>/dev/null | grep ss_rules)" ]; then
		for ip in $hostip; do
			ipset del ss_rules_dst_bypass_all $ip
		done
	fi
fi