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find_route() {
ip route get $1 | sed -e 's/ /\n/g' | \
sed -ne '1p;/via/{N;p};/dev/{N;p};/src/{N;p};/mtu/{N;p}'
}
scan_pptp() {
config_set "$1" device "pptp-$1"
}
stop_interface_pptp() {
stop_interface_ppp "$1"
for ip in $(uci_get_state network "$1" serv_addrs); do
ip route del "$ip" 2>/dev/null
done
}
coldplug_interface_pptp() {
setup_interface_pptp "pptp-$1" "$1"
}
setup_interface_pptp() {
local config="$2"
local ifname
local device
config_get device "$config" device
local server
config_get server "$config" server
local buffering
config_get_bool buffering "$config" buffering 1
[ "$buffering" == 0 ] && buffering="--nobuffer" || buffering=
for module in slhc ppp_generic ppp_async ip_gre; do
/sbin/insmod $module 2>&- >&-
done
sleep 1
local serv_addrs=""
for ip in $(resolveip -t 3 "${server}"); do
append serv_addrs "$ip"
ip route replace $(find_route $ip)
done
uci_toggle_state network "$config" serv_addrs "$serv_addrs"
}
# fix up the netmask
config_get netmask "$config" netmask
[ -z "$netmask" -o -z "$device" ] || ifconfig $device netmask $netmask
config_get mtu "$config" mtu
mtu=${mtu:-1452}
start_pppd "$config" \
pty "/usr/sbin/pptp $server --loglevel 0 --nolaunchpppd $buffering" \
file /etc/ppp/options.pptp \
mtu $mtu mru $mtu
}
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