6in4: add netifd support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31036 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 104 insertions, 0 deletions

diff --git a/package/6in4/files.old/6in4.sh b/package/6in4/files.old/6in4.sh
new file mode 100755
index 0000000000..5f8dfffe57
--- /dev/null
+++ b/package/6in4/files.old/6in4.sh
@@ -0,0 +1,104 @@
+# 6in4.sh - IPv6-in-IPv4 tunnel backend
+# Copyright (c) 2010 OpenWrt.org
+
+find_6in4_wanif() {
+	local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
+	[ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
+}
+
+find_6in4_wanip() {
+	local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }"
+	echo "${ip%%[^0-9.]*}"
+}
+
+# Hook into scan_interfaces() to synthesize a .device option
+# This is needed for /sbin/ifup to properly dispatch control
+# to setup_interface_6in4() even if no .ifname is set in
+# the configuration.
+scan_6in4() {
+	config_set "$1" device "6in4-$1"
+}
+
+coldplug_interface_6in4() {
+	setup_interface_6in4 "6in4-$1" "$1"
+}
+
+setup_interface_6in4() {
+	local iface="$1"
+	local cfg="$2"
+	local link="6in4-$cfg"
+
+	local local4=$(uci_get network "$cfg" ipaddr)
+
+	local remote4
+	config_get remote4 "$cfg" peeraddr
+
+	local local6
+	config_get local6 "$cfg" ip6addr
+
+	local mtu
+	config_get mtu "$cfg" mtu
+
+	local ttl
+	config_get ttl "$cfg" ttl
+
+	local metric
+	config_get metric "$cfg" metric
+
+	local defaultroute
+	config_get_bool defaultroute "$cfg" defaultroute 1
+
+	# If local4 is unset, guess local IPv4 address from the
+	# interface used by the default route.
+	[ -z "$local4" ] && {
+		local wanif=$(find_6in4_wanif)
+		[ -n "$wanif" ] && {
+			local4=$(find_6in4_wanip "$wanif")
+			uci_set_state network "$cfg" wan_device "$wanif"
+		}
+	}
+
+	[ -n "$local4" ] && {
+		# creating the tunnel below will trigger a net subsystem event
+		# prevent it from touching or iface by disabling .auto here
+		uci_set_state network "$cfg" ifname $link
+		uci_set_state network "$cfg" auto 0
+
+		ip tunnel add $link mode sit remote $remote4 local $local4 ttl ${ttl:-64}
+		ip link set $link up
+		ip link set mtu ${mtu:-1280} dev $link
+		ip addr add $local6 dev $link
+
+		uci_set_state network "$cfg" ipaddr $local4
+		uci_set_state network "$cfg" ip6addr $local6
+
+		[ "$defaultroute" = 1 ] && {
+			ip -6 route add ::/0 ${metric:+metric $metric} dev $link
+			uci_set_state network "$cfg" defaultroute 1
+		}
+
+		env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
+	} || {
+		echo "Cannot determine local IPv4 address for 6in4 tunnel $cfg - skipping"
+	}
+}
+
+stop_interface_6in4() {
+	local cfg="$1"
+	local link="6in4-$cfg"
+
+	local local6=$(uci_get_state network "$cfg" ip6addr)
+	local defaultroute=$(uci_get_state network "$cfg" defaultroute)
+
+	grep -qs "^ *$link:" /proc/net/dev && {
+		env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" &
+
+		[ "$defaultroute" = "1" ] && {
+			ip -6 route del ::/0 dev $link
+		}
+
+		ip addr del $local6 dev $link
+		ip link set $link down
+		ip tunnel del $link
+	}
+}