package/6in4/files/6in4.sh

   1 # 6in4.sh - IPv6-in-IPv4 tunnel backend
   2 # Copyright (c) 2010 OpenWrt.org
   3
   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
   7 # the configuration.
   8 scan_6in4() {
   9         config_set "$1" device "6in4-$1"
  10 }
  11
  12 coldplug_interface_6in4() {
  13         setup_interface_6in4 "6in4-$1" "$1"
  14 }
  15
  16 setup_interface_6in4() {
  17         local iface="$1"
  18         local cfg="$2"
  19         local link="6in4-$cfg"
  20
  21         local local4
  22         config_get local4 "$cfg" ipaddr
  23
  24         local remote4
  25         config_get remote4 "$cfg" peeraddr
  26
  27         local local6
  28         config_get local6 "$cfg" ip6addr
  29
  30         local mtu
  31         config_get mtu "$cfg" mtu
  32
  33         local ttl
  34         config_get ttl "$cfg" ttl
  35
  36         local defaultroute
  37         config_get_bool defaultroute "$cfg" defaultroute 1
  38
  39
  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
  44
  45         ip tunnel add $link mode sit remote $remote4 local $local4 ttl 255
  46         ip link set $link up
  47         ip link set mtu ${mtu:-1280} dev $link
  48         ip tunnel change $link ttl ${ttl:-64}
  49         ip addr add $local6 dev $link
  50
  51         uci_set_state network "$cfg" ip6addr $local6
  52
  53         [ "$defaultroute" = 1 ] && {
  54                 ip -6 route add ::/0 dev $link
  55                 uci_set_state network "$cfg" defaultroute 1
  56         }
  57
  58         env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
  59 }
  60
  61 stop_interface_6in4() {
  62         local cfg="$1"
  63         local link="6in4-$cfg"
  64
  65         local local6=$(uci_get_state network "$cfg" ip6addr)
  66         local defaultroute=$(uci_get_state network "$cfg" defaultroute)
  67
  68         grep -qs "^ *$link:" /proc/net/dev && {
  69                 env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
  70
  71                 [ "$defaultroute" = "1" ] && {
  72                         ip -6 route del ::/0 dev $link
  73                 }
  74
  75                 ip addr del $local6 dev $link
  76                 ip link set $link down
  77                 ip tunnel del $link
  78         }
  79 }