Add support for stateful DHCPv6

libs/core/root/etc/config/ucitrack

@@ -48,3 +48,6 @@ config samba
 
 config tinyproxy
 	option init tinyproxy
+
+config 6relayd
+	option init 6relayd

modules/admin-core/luasrc/tools/status.lua

@@ -66,10 +66,34 @@ function dhcp_leases()
 end
 
 function dhcp6_leases()
-	if luci.sys.call("dnsmasq --version 2>/dev/null | grep -q ' DHCPv6 '") == 0 then
+	local nfs = require "nixio.fs"
+	local leasefile = "/tmp/hosts/6relayd"
+	local rv = {}
+
+	if nfs.access(leasefile, "r") then
+		local fd = io.open(leasefile, "r")
+		if fd then
+			while true do
+				local ln = fd:read("*l")
+				if not ln then
+					break
+				else
+					local iface, duid, iaid, name, ts, id, length, ip = ln:match("^# (%S+) (%S+) (%S+) (%S+) (%d+) (%S+) (%S+) (.*)")
+					if ip then
+						rv[#rv+1] = {
+							expires  = os.difftime(tonumber(ts) or 0, os.time()),
+							duid     = duid,
+							ip6addr  = ip,
+							hostname = (name ~= "-") and name
+						}
+					end
+				end
+			end
+			fd:close()
+		end
+		return rv
+	elseif luci.sys.call("dnsmasq --version 2>/dev/null | grep -q ' DHCPv6 '") == 0 then
 		return dhcp_leases_common(6)
-	else
-		return nil
 	end
 end
 

modules/admin-full/luasrc/model/cbi/admin_network/ipv6.lua

@@ -84,4 +84,19 @@ o:depends("rd", "server")
 o = s:option(Flag, "compat_ula", translate("ULA-preference compatibility"),
 	translate("Work around IPv6 address-selection issues of some devices."))
 
+m:section(SimpleSection).template = "admin_network/lease_status"
+
+s = m:section(TypedSection, "lease", translate("Static Leases"),
+        translate("Static leases are used to assign fixed IPv6 Interface-IDs to clients. Interface-IDs are appended to available prefixes to form IPv6-addresses. " ..
+            " (e.g. a prefix of 2001:db80::/64 combined with Interface-ID 123456 will form the address 2001:db80::12:3456)") .. "<br />" ..
+        translate("Use the <em>Add</em> Button to add a new lease entry. The <em>DUID</em> " ..
+            "indentifies the host, the <em>Interface-ID</em> specifies the ID to use in addresses."))
+
+s.addremove = true
+s.anonymous = true
+s.template = "cbi/tblsection"
+
+s:option(Value, "duid", translate("DUID")).optional = false
+s:option(Value, "id", translate("Interface-ID")).optional = false
+
 return m