diff --git a/package/gluon-core/luasrc/usr/lib/lua/gluon/iputil.lua b/package/gluon-core/luasrc/usr/lib/lua/gluon/iputil.lua
new file mode 100644
index 00000000..39e0897a
--- /dev/null
+++ b/package/gluon-core/luasrc/usr/lib/lua/gluon/iputil.lua
@@ -0,0 +1,96 @@
+local bit = require 'bit'
+local string = string
+local tonumber = tonumber
+local table = table
+module 'gluon.iputil'
+
+function IPv6(address)
+	--[[
+	(c) 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
+	(c) 2008 Steven Barth <steven@midlink.org>
+
+	Licensed under the Apache License, Version 2.0 (the "License").
+	You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+	]]--
+	local data = {}
+
+	local borderl = address:sub(1, 1) == ":" and 2 or 1
+	local borderh, zeroh, chunk, block
+
+	if #address > 45 then return nil end
+
+	repeat
+		borderh = address:find(":", borderl, true)
+		if not borderh then break end
+
+		block = tonumber(address:sub(borderl, borderh - 1), 16)
+		if block and block <= 0xFFFF then
+			data[#data+1] = block
+		else
+			if zeroh or borderh - borderl > 1 then return nil end
+			zeroh = #data + 1
+		end
+
+		borderl = borderh + 1
+	until #data == 7
+
+	chunk = address:sub(borderl)
+	if #chunk > 0 and #chunk <= 4 then
+		block = tonumber(chunk, 16)
+		if not block or block > 0xFFFF then return nil end
+
+		data[#data+1] = block
+	elseif #chunk > 4 then
+		if #data == 7 or #chunk > 15 then return nil end
+		borderl = 1
+		for i=1, 4 do
+			borderh = chunk:find(".", borderl, true)
+			if not borderh and i < 4 then return nil end
+			borderh = borderh and borderh - 1
+
+			block = tonumber(chunk:sub(borderl, borderh))
+			if not block or block > 255 then return nil end
+
+			if i == 1 or i == 3 then
+				data[#data+1] = block * 256
+			else
+				data[#data] = data[#data] + block
+			end
+
+			borderl = borderh and borderh + 2
+		end
+	end
+
+	if zeroh then
+		if #data == 8 then return nil end
+		while #data < 8 do
+			table.insert(data, zeroh, 0)
+		end
+	end
+
+	if #data == 8 then
+		return data[1], data[2], data[3], data[4], data[5], data[6], data[7], data[8]
+	end
+end
+
+function mac_to_ip(prefix, mac)
+	local m1, m2, m3, m6, m7, m8 = string.match(mac, '(%x%x):(%x%x):(%x%x):(%x%x):(%x%x):(%x%x)')
+	local m4 = 0xff
+	local m5 = 0xfe
+	m1 = bit.bxor(tonumber(m1, 16), 0x02)
+
+	local h1 = 0x100 * m1 + tonumber(m2, 16)
+	local h2 = 0x100 * tonumber(m3, 16) + m4
+	local h3 = 0x100 * m5 + tonumber(m6, 16)
+	local h4 = 0x100 * tonumber(m7, 16) + tonumber(m8, 16)
+
+	local prefix, plen = string.match(prefix, '(.*)/(%d+)')
+	plen = tonumber(plen, 10)
+
+	local p1, p2, p3, p4, p5, p6, p7, p8 = IPv6(prefix)
+
+	return string.format("%x:%x:%x:%x:%x:%x:%x:%x/%d", p1, p2, p3, p4, h1, h2, h3, h4, 128)
+end
+
diff --git a/package/gluon-mesh-babel/luasrc/lib/gluon/upgrade/300-gluon-mesh-babel-ip6 b/package/gluon-mesh-babel/luasrc/lib/gluon/upgrade/300-gluon-mesh-babel-ip6
index 7ab3f5ec..1d3f5381 100755
--- a/package/gluon-mesh-babel/luasrc/lib/gluon/upgrade/300-gluon-mesh-babel-ip6
+++ b/package/gluon-mesh-babel/luasrc/lib/gluon/upgrade/300-gluon-mesh-babel-ip6
@@ -1,102 +1,11 @@
 #!/usr/bin/lua
 
-local bit = require 'bit'
 local sysconfig = require 'gluon.sysconfig'
 local uci = require('simple-uci').cursor()
 local site = require 'gluon.site'
+local iputil = require 'gluon.iputil'
 
-
-function IPv6(address)
-	--[[
-	(c) 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
-	(c) 2008 Steven Barth <steven@midlink.org>
-
-	Licensed under the Apache License, Version 2.0 (the "License").
-	You may obtain a copy of the License at
-
-	http://www.apache.org/licenses/LICENSE-2.0
-	]]--
-	local data = {}
-
-	local borderl = address:sub(1, 1) == ":" and 2 or 1
-	local borderh, zeroh, chunk, block
-
-	if #address > 45 then return nil end
-
-	repeat
-		borderh = address:find(":", borderl, true)
-		if not borderh then break end
-
-		block = tonumber(address:sub(borderl, borderh - 1), 16)
-		if block and block <= 0xFFFF then
-			data[#data+1] = block
-		else
-			if zeroh or borderh - borderl > 1 then return nil end
-			zeroh = #data + 1
-		end
-
-		borderl = borderh + 1
-	until #data == 7
-
-	chunk = address:sub(borderl)
-	if #chunk > 0 and #chunk <= 4 then
-		block = tonumber(chunk, 16)
-		if not block or block > 0xFFFF then return nil end
-
-		data[#data+1] = block
-	elseif #chunk > 4 then
-		if #data == 7 or #chunk > 15 then return nil end
-		borderl = 1
-		for i=1, 4 do
-			borderh = chunk:find(".", borderl, true)
-			if not borderh and i < 4 then return nil end
-			borderh = borderh and borderh - 1
-
-			block = tonumber(chunk:sub(borderl, borderh))
-			if not block or block > 255 then return nil end
-
-			if i == 1 or i == 3 then
-				data[#data+1] = block * 256
-			else
-				data[#data] = data[#data] + block
-			end
-
-			borderl = borderh and borderh + 2
-		end
-	end
-
-	if zeroh then
-		if #data == 8 then return nil end
-		while #data < 8 do
-			table.insert(data, zeroh, 0)
-		end
-	end
-
-	if #data == 8 then
-		return data[1], data[2], data[3], data[4], data[5], data[6], data[7], data[8]
-	end
-end
-
-function mac_to_ip(prefix, mac)
-	local m1, m2, m3, m6, m7, m8 = string.match(mac, '(%x%x):(%x%x):(%x%x):(%x%x):(%x%x):(%x%x)')
-	local m4 = 0xff
-	local m5 = 0xfe
-	m1 = bit.bxor(tonumber(m1, 16), 0x02)
-
-	local h1 = 0x100 * m1 + tonumber(m2, 16)
-	local h2 = 0x100 * tonumber(m3, 16) + m4
-	local h3 = 0x100 * m5 + tonumber(m6, 16)
-	local h4 = 0x100 * tonumber(m7, 16) + tonumber(m8, 16)
-
-	local prefix, plen = string.match(prefix, '(.*)/(%d+)')
-	plen = tonumber(plen, 10)
-
-	local p1, p2, p3, p4, p5, p6, p7, p8 = IPv6(prefix)
-
-	return string.format("%x:%x:%x:%x:%x:%x:%x:%x/%d", p1, p2, p3, p4, h1, h2, h3, h4, 128)
-end
-
-local ip = mac_to_ip(site.node_prefix6(), sysconfig.primary_mac)
+local ip = iputil.mac_to_ip(site.node_prefix6(), sysconfig.primary_mac)
 
 uci:set('network', 'loopback', 'ip6addr', ip)
 uci:save('network')