defintions: define ND Route Information option

We can't express a 2-bit integer at a 3 bit offset yet
so just print the reserved value.

Also allows this option to be excluded, fixing #506.

Author: rsmarples

src/dhcpcd-definitions-small.conf

@@ -61,14 +61,21 @@ embed		bitflags=LAH		flags
 embed		uint32			vltime
 embed		uint32			pltime
 embed		uint32			reserved
-embed		array ip6address	prefix
+embed		ip6address		prefix
 
 # option 4 is only for Redirect messages
 
 definend 5	embed			mtu
 embed		uint16			reserved
 embed		uint32			mtu
 
+definend 24	index embed		route_information
+embed		byte			length
+# bits 4 and 5 are route preference, but we can't express this
+embed		byte			reserved
+embed		uint32			lifetime
+embed		ip6address		prefix
+
 # ND6 options, RFC6101
 definend 25	index embed		rdnss
 embed		uint16			reserved

src/dhcpcd-definitions.conf

@@ -398,7 +398,7 @@ embed		bitflags=LAH		flags
 embed		uint32			vltime
 embed		uint32			pltime
 embed		uint32			reserved
-embed		array ip6address	prefix
+embed		ip6address		prefix
 
 # option 4 is only for Redirect messages
 
@@ -412,6 +412,13 @@ embed		uint16			reserved
 embed		uint16			preference
 embed		uint16			lifetime
 
+definend 24	index embed		route_information
+embed		byte			length
+# bits 4 and 5 are route preference, but we can't express this
+embed		byte			reserved
+embed		uint32			lifetime
+embed		ip6address		prefix
+
 # ND6 options, RFC6101
 definend 25	index embed		rdnss
 embed		uint16			reserved