first commit

etc_org/dhcp/dhclient-exit-hooks.d/rfc3442-classless-routes

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+# set classless routes based on the format specified in RFC3442
+# e.g.:
+#   new_rfc3442_classless_static_routes='24 192 168 10 192 168 1 1 8 10 10 17 66 41'
+# specifies the routes:
+#   192.168.10.0/24 via 192.168.1.1
+#   10.0.0.0/8 via 10.10.17.66.41
+
+RUN="yes"
+
+
+if [ "$RUN" = "yes" ]; then
+	if [ -n "$new_rfc3442_classless_static_routes" ]; then
+		if [ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then
+
+			set -- $new_rfc3442_classless_static_routes
+
+			while [ $# -gt 0 ]; do
+				net_length=$1
+				via_arg=''
+
+				case $net_length in
+					32|31|30|29|28|27|26|25)
+						if [ $# -lt 9 ]; then
+							return 1
+						fi
+						net_address="${2}.${3}.${4}.${5}"
+						gateway="${6}.${7}.${8}.${9}"
+						shift 9
+						;;
+					24|23|22|21|20|19|18|17)
+						if [ $# -lt 8 ]; then
+							return 1
+						fi
+						net_address="${2}.${3}.${4}.0"
+						gateway="${5}.${6}.${7}.${8}"
+						shift 8
+						;;
+					16|15|14|13|12|11|10|9)
+						if [ $# -lt 7 ]; then
+							return 1
+						fi
+						net_address="${2}.${3}.0.0"
+						gateway="${4}.${5}.${6}.${7}"
+						shift 7
+						;;
+					8|7|6|5|4|3|2|1)
+						if [ $# -lt 6 ]; then
+							return 1
+						fi
+						net_address="${2}.0.0.0"
+						gateway="${3}.${4}.${5}.${6}"
+						shift 6
+						;;
+					0)	# default route
+						if [ $# -lt 5 ]; then
+							return 1
+						fi
+						net_address="0.0.0.0"
+						gateway="${2}.${3}.${4}.${5}"
+						shift 5
+						;;
+					*)	# error
+						return 1
+						;;
+				esac
+
+				# take care of link-local routes
+				if [ "${gateway}" != '0.0.0.0' ]; then
+					via_arg="via ${gateway}"
+				fi
+
+				# set route (ip detects host routes automatically)
+				ip -4 route add "${net_address}/${net_length}" \
+					${via_arg} dev "${interface}" >/dev/null 2>&1
+			done
+		fi
+	fi
+fi