2 files changed, 172 insertions, 0 deletions
diff --git a/package/6in4/files.old/6in4.hotplug b/package/6in4/files.old/6in4.hotplug
new file mode 100644
index 000000000..3d9def448
--- /dev/null
+++ b/package/6in4/files.old/6in4.hotplug
@@ -0,0 +1,68 @@
+#!/bin/sh
+
+if [ "$ACTION" = ifup ]; then
+	. /etc/functions.sh
+
+	include /lib/network
+	scan_interfaces
+
+	update_tunnel() {
+		local cfg="$1"
+
+		local proto
+		config_get proto "$cfg" proto
+		[ "$proto" = 6in4 ] || return 0
+
+		local wandev
+		config_get wandev "$cfg" wan_device "$(find_6in4_wanif)"
+		[ "$wandev" = "$DEVICE" ] || return 0
+
+		local wanip=$(find_6in4_wanip "$wandev")
+
+		[ -n "$wanip" ] && {
+			lsmod | grep -q ^sit || {
+				logger -t 6in4-update "Tunneling driver not loaded yet, deferring action"
+				exit 0
+			}
+
+			local tunnelid
+			config_get tunnelid "$cfg" tunnelid
+
+			local username
+			config_get username "$cfg" username
+
+			local password
+			config_get password "$cfg" password
+
+			uci_set_state network "$cfg" ipaddr "$wanip"
+
+			[ -n "$tunnelid" ] && [ -n "$username" ] && [ -n "$password" ] && {
+				[ "${#password}" == 32 -a -z "${password//[a-fA-F0-9]/}" ] || {
+					password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
+				}
+
+				(
+					local url="http://ipv4.tunnelbroker.net/ipv4_end.php?ip=AUTO&apikey=$username&pass=$password&tid=$tunnelid"
+					local try=0
+					local max=3
+
+					while [ $((++try)) -le $max ]; do
+						wget -qO/dev/null "$url" 2>/dev/null && {
+							logger -t 6in4-update "Updated tunnel #$tunnelid endpoint to $wanip"
+							ifup "$cfg"
+							break
+						} || {
+							logger -t 6in4-update "Try $try/$max failed, retrying"
+							sleep 1
+						}
+					done
+				)&
+			} || {
+				logger -t 6in4-update "Re-establishing tunnel due to change on $INTERFACE ($DEVICE)"
+				ifup "$cfg" &
+			}
+		}
+	}
+
+	config_foreach update_tunnel interface
+fi
diff --git a/package/6in4/files.old/6in4.sh b/package/6in4/files.old/6in4.sh
new file mode 100755
index 000000000..5f8dfffe5
--- /dev/null
+++ b/package/6in4/files.old/6in4.sh
@@ -0,0 +1,104 @@
+# 6in4.sh - IPv6-in-IPv4 tunnel backend
+# Copyright (c) 2010 OpenWrt.org
+
+find_6in4_wanif() {
+	local if=$(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
+	}
+}