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80 lines
1.9 KiB
Bash
80 lines
1.9 KiB
Bash
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# 6in4.sh - IPv6-in-IPv4 tunnel backend
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# Copyright (c) 2010 OpenWrt.org
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# Hook into scan_interfaces() to synthesize a .device option
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# This is needed for /sbin/ifup to properly dispatch control
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# to setup_interface_6in4() even if no .ifname is set in
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# the configuration.
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scan_6in4() {
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config_set "$1" device "6in4-$1"
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}
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coldplug_interface_6in4() {
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setup_interface_6in4 "6in4-$1" "$1"
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}
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setup_interface_6in4() {
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local iface="$1"
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local cfg="$2"
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local link="6in4-$cfg"
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local local4
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config_get local4 "$cfg" ipaddr
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local remote4
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config_get remote4 "$cfg" peeraddr
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local local6
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config_get local6 "$cfg" ip6addr
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local mtu
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config_get mtu "$cfg" mtu
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local ttl
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config_get ttl "$cfg" ttl
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local defaultroute
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config_get_bool defaultroute "$cfg" defaultroute 1
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# creating the tunnel below will trigger a net subsystem event
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# prevent it from touching or iface by disabling .auto here
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uci_set_state network "$cfg" ifname $link
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uci_set_state network "$cfg" auto 0
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ip tunnel add $link mode sit remote $remote4 local $local4 ttl 255
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ip link set $link up
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ip link set mtu ${mtu:-1280} dev $link
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ip tunnel change $link ttl ${ttl:-64}
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ip addr add $local6 dev $link
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uci_set_state network "$cfg" ip6addr $local6
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[ "$defaultroute" = 1 ] && {
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ip -6 route add ::/0 dev $link
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uci_set_state network "$cfg" defaultroute 1
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}
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env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
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}
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stop_interface_6in4() {
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local cfg="$1"
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local link="6in4-$cfg"
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local local6=$(uci_get_state network "$cfg" ip6addr)
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local defaultroute=$(uci_get_state network "$cfg" defaultroute)
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grep -qs "^ *$link:" /proc/net/dev && {
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env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
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[ "$defaultroute" = "1" ] && {
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ip -6 route del ::/0 dev $link
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}
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ip addr del $local6 dev $link
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ip link set $link down
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ip tunnel del $link
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}
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}
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