add router scripts

router/both_provs.sh

+#!/bin/sh
+
+# use Ekvant as default until we do not fix nexthop issue
+ip route replace default via 212.176.192.226
+
+# Use Ekvant as main defaul
+ip route replace default scope global table common via 212.176.192.226
+
+
+ip route replace default scope global table hop nexthop via 212.176.192.226 weight 40  nexthop via 85.235.198.25 weight 60
+# torrent client
+ip rule del from 91.232.225.21 lookup hop
+ip rule del from 91.232.225.21 lookup hop
+ip rule del from 91.232.225.21 lookup hop
+ip rule add from 91.232.225.21 lookup hop

router/check_connectivity.sh

+#!/bin/sh
+
+cd $(dirname $0)
+
+# ya.ru google.com
+HOSTS="93.158.134.3 173.194.71.139"
+
+# return false if both failed
+check_hosts()
+{
+	local iface="$1"
+	for try in 1 2 3 ; do
+		for h in $HOSTS ; do
+			ping -q -I $iface -c 1 -W 1 $h >/dev/null && return
+		done
+	done
+	return 1
+}
+
+check_bird()
+{
+	local ST=$(birdc show protocols "$1") || return
+	echo "$ST" | grep -q Established
+}
+
+STATE=both
+
+set_state()
+{
+	# Ekvant failed
+	if ! check_hosts 212.176.192.225 ; then
+		NEWSTATE=prometey
+		return
+	fi
+
+	# Prometey
+	if ! check_hosts 85.235.198.26 ; then
+		NEWSTATE=ekvant
+		return
+	fi
+
+	NEWSTATE=both
+}
+
+set_state_by_bgp()
+{
+	[ "$NEWSTATE" = "both" ] || return
+	local SEKVANT=
+	local SPROMETEY=
+	check_bird bgpAS2854 && SEKVANT=ok
+	check_bird bgpAS35000 && SPROMETEY=ok
+	[ "$SEKVANT$SPROMETEY" = "okok" ] && return
+	[ "$SEKVANT$SPROMETEY" = "" ] && NEWSTATE=none && return
+	[ "$SEKVANT" = "ok" ] && NEWSTATE=ekvant && return
+	[ "$SPROMETEY" = "ok" ] && NEWSTATE=prometey && return
+}
+
+./both_provs.sh
+
+while true ; do
+	set_state
+	set_state_by_bgp
+	if [ "$STATE" != "$NEWSTATE" ] ; then
+
+		case "$NEWSTATE" in
+			prometey)
+				./only_prometey.sh
+				;;
+			ekvant)
+				./only_ekvant.sh
+				;;
+			both)
+				./both_provs.sh
+				;;
+			none)
+				echo "Sorry, no connection!" >&2
+				;;
+			*)
+				echo "Unknown state" >&2
+				exit 1
+				;;
+		esac
+
+		echo "State changed to $NEWSTATE"
+		STATE=$NEWSTATE
+	fi
+	sleep 7
+done

router/only_ekvant.sh

+#!/bin/sh
+
+# HACK: local rule
+ip route replace default via 212.176.192.226
+
+# Ekvant exports default to us, but we will repeat it
+ip route replace default scope global table common via 212.176.192.226
+
+# remove hops for torrent client
+ip rule del from 91.232.225.21 lookup hop
+ip rule del from 91.232.225.21 lookup hop
+ip rule del from 91.232.225.21 lookup hop

router/only_prometey.sh

+#!/bin/sh
+
+# HACK: local rule
+ip route replace default via 85.235.198.25
+
+# Prometey does not export default route for us
+ip route replace default scope global table common via 85.235.198.25
+
+# remove hops for torrent client
+ip rule del from 91.232.225.21 lookup hop
+ip rule del from 91.232.225.21 lookup hop
+ip rule del from 91.232.225.21 lookup hop

router/remove_cache.sh

+#!/bin/sh
+
+# update eepm and use eepm clean
+rm -vf /var/cache/apt/*.bin
+rm -vf /var/lib/apt/lists/*pkglist*
+rm -vf /var/lib/apt/lists/*release*