Merge net.OS into net

net/apipa.sh

@@ -0,0 +1,48 @@
+# Copyright 2007-2008 Roy Marples <roy@marples.name>
+# All rights reserved. Released under the 2-clause BSD license.
+
+apipa_depend()
+{
+	program /sbin/arping
+}
+
+_random()
+{
+	local r=${RANDOM}
+	if [ -n "${r}" ]; then
+		echo "${r}"
+	else
+		uuidgen | sed -n -e 's/[^[:digit:]]//g' -e 's/\(^.\{1,7\}\).*/\1/p'
+	fi
+}
+
+apipa_start()
+{
+	local iface="$1" i1= i2= addr= i=0
+
+	_exists true || return 1
+	
+	einfo "Searching for free addresses in 169.254.0.0/16"
+	eindent
+
+	while [ ${i} -lt 64516 ]; do
+		i1=$((($(_random) % 255) + 1))
+		i2=$((($(_random) % 255) + 1))
+
+		addr="169.254.${i1}.${i2}"
+		vebegin "${addr}/16"
+		if ! arping_address "${addr}"; then
+			eval config_${config_index}="\"${addr}/16 broadcast 169.254.255.255\""
+			config_index=$((${config_index} - 1))
+			veend 0
+			eoutdent
+			return 0
+		fi
+
+		i=$((${i} + 1))
+	done
+
+	eerror "No free address found!"
+	eoutdent
+	return 1
+}