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#!/bin/sh
. /etc/functions.sh
type=$1

[ "$(nvram get ${type}_proto)" = "pptp" ] || exit

[ -d "/var/lock" ] || mkdir -p /var/lock || exit 1

for module in slhc ppp_generic ppp_async ip_gre; do
	/sbin/insmod $module 2>&- >&-
done

while :; do
	PPTP_PROTO="$(nvram get pptp_proto)"
	[ "$PPTP_PROTO" = "static" ] || PPTP_PROTO=""
	PPTP_PROTO="${PPTP_PROTO:-dhcp}"
	IP=$(nvram get pptp_server_ip)
	USERNAME=$(nvram get ppp_username)
	PASSWORD=$(nvram get ppp_passwd)
	REDIAL=$(nvram get ppp_redialperiod)
	REDIAL=${REDIAL:+lcp-echo-interval $REDIAL}
	IDLETIME=$(nvram get ppp_idletime)
	IDLETIME=${IDLETIME:+lcp-echo-failure $IDLETIME}
	MTU=$(nvram get ppp_mtu)
	MTU=${MTU:+ mtu $MTU mru $MTU}

	do_ifup $PPTP_PROTO $type
	
	# hack for some buggy ISPs
	NETMASK=$(nvram get ${type}_netmask)
	IFNAME=$(nvram get pptp_ifname)
	[ -z "$NETMASK" -o -z "$IFNAME" ] || ifconfig $IFNAME netmask $NETMASK

	/usr/sbin/pppd nodetach \
		pty "/usr/sbin/pptp $IP --loglevel 0 --nolaunchpppd" \
		file /etc/ppp/options.pptp \
		connect /bin/true \
		usepeerdns \
		defaultroute \
		replacedefaultroute \
		linkname $type \
		user "$USERNAME" \
		password "$PASSWORD" \
		$MTU \
		$IDLETIME \
		$REDIAL
done &