1 # 6in4.sh - IPv6-in-IPv4 tunnel backend
2 # Copyright (c) 2010 OpenWrt.org
4 # Hook into scan_interfaces() to synthesize a .device option
5 # This is needed for /sbin/ifup to properly dispatch control
6 # to setup_interface_6in4() even if no .ifname is set in
9 config_set "$1" device "6in4-$1"
12 coldplug_interface_6in4() {
13 setup_interface_6in4 "6in4-$1" "$1"
16 setup_interface_6in4() {
19 local link="6in4-$cfg"
22 config_get local4 "$cfg" ipaddr
25 config_get remote4 "$cfg" peeraddr
28 config_get local6 "$cfg" ip6addr
31 config_get mtu "$cfg" mtu
34 config_get ttl "$cfg" ttl
37 config_get_bool defaultroute "$cfg" defaultroute 1
40 # creating the tunnel below will trigger a net subsystem event
41 # prevent it from touching or iface by disabling .auto here
42 uci_set_state network "$cfg" ifname $link
43 uci_set_state network "$cfg" auto 0
45 ip tunnel add $link mode sit remote $remote4 local $local4 ttl 255
47 ip link set mtu ${mtu:-1280} dev $link
48 ip tunnel change $link ttl ${ttl:-64}
49 ip addr add $local6 dev $link
51 uci_set_state network "$cfg" ip6addr $local6
53 [ "$defaultroute" = 1 ] && {
54 ip -6 route add ::/0 dev $link
55 uci_set_state network "$cfg" defaultroute 1
58 env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
61 stop_interface_6in4() {
63 local link="6in4-$cfg"
65 local local6=$(uci_get_state network "$cfg" ip6addr)
66 local defaultroute=$(uci_get_state network "$cfg" defaultroute)
68 grep -qs "^ *$link:" /proc/net/dev && {
69 env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
71 [ "$defaultroute" = "1" ] && {
72 ip -6 route del ::/0 dev $link
75 ip addr del $local6 dev $link
76 ip link set $link down