Add example status script

1 files changed, 153 insertions, 0 deletions

diff --git a/odhcp6c-example-script.sh b/odhcp6c-example-script.sh
new file mode 100755
index 0000000..6215257
--- /dev/null
+++ b/odhcp6c-example-script.sh
@@ -0,0 +1,153 @@
+#!/bin/sh
+[ -z "$2" ] && echo "Error: should be run by odhcpc6c" && exit 1
+
+update_resolv() {
+	local device="$1"
+	local dns="$2"
+	
+	(
+		flock -n 9
+		grep -v "#odhcp6c:$device:" /etc/resolv.conf > /tmp/resolv.conf.tmp
+		for c in $dns; do
+			echo "nameserver $c #odhcp6c:$device:" >> /tmp/resolv.conf.tmp
+		done
+		mv /tmp/resolv.conf.tmp /etc/resolv.conf
+	) 9>/tmp/resolv.conf.lock
+	rm -f /tmp/resolv.conf.lock /tmp/resolv.conf.tmp
+}
+
+setup_interface () {
+	local device="$1"
+
+	# Merge RA-DNS
+	for radns in $RA_DNS; do
+		local duplicate=0
+		for dns in $RDNSS; do
+			[ "$radns" = "$dns" ] && duplicate=1
+		done
+		[ "$duplicate" = 0 ] && RDNSS="$RDNSS $radns"
+	done
+
+	local dnspart=""
+	for dns in $RDNSS; do
+		if [ -z "$dnspart" ]; then
+			dnspart="\"$dns\""
+		else
+			dnspart="$dnspart, \"$dns\""
+		fi
+	done
+
+	update_resolv "$device" "$dns"
+
+	local prefixpart=""
+	for entry in $PREFIXES; do
+		local addr="${entry%%,*}"
+                entry="${entry#*,}"
+                local preferred="${entry%%,*}"
+                entry="${entry#*,}"
+                local valid="${entry%%,*}"
+                entry="${entry#*,}"
+		[ "$entry" = "$valid" ] && entry=
+
+		local class=""
+		local excluded=""
+
+		while [ -n "$entry" ]; do
+			local key="${entry%%=*}"
+                	entry="${entry#*=}"
+			local val="${entry%%,*}"
+                	entry="${entry#*,}"
+			[ "$entry" = "$val" ] && entry=
+
+			if [ "$key" = "class" ]; then
+				class=", \"class\": $val"
+			elif [ "$key" = "excluded" ]; then
+				excluded=", \"excluded\": \"$val\""
+			fi
+		done
+
+		local prefix="{\"address\": \"$addr\", \"preferred\": $preferred, \"valid\": $valid $class $excluded}"
+		
+		if [ -z "$prefixpart" ]; then
+			prefixpart="$prefix"
+		else
+			prefixpart="$prefixpart, $prefix"
+		fi
+
+		# TODO: delete this somehow when the prefix disappears
+		ip -6 route add unreachable "$addr"
+	done
+
+	ip -6 route flush dev "$device"
+	ip -6 address flush dev "$device" scope global
+
+	# Merge addresses
+	for entry in $RA_ADDRESSES; do
+		local duplicate=0
+		local addr="${entry%%/*}"
+		for dentry in $ADDRESSES; do
+			local daddr="${dentry%%/*}"
+			[ "$addr" = "$daddr" ] && duplicate=1
+		done
+		[ "$duplicate" = "0" ] && ADDRESSES="$ADDRESSES $entry"
+	done
+
+	for entry in $ADDRESSES; do
+		local addr="${entry%%,*}"
+		entry="${entry#*,}"
+		local preferred="${entry%%,*}"
+		entry="${entry#*,}"
+		local valid="${entry%%,*}"
+
+		ip -6 address add "$addr" dev "$device" preferred_lft "$preferred" valid_lft "$valid" 
+	done
+
+	for entry in $RA_ROUTES; do
+		local addr="${entry%%,*}"
+		entry="${entry#*,}"
+		local gw="${entry%%,*}"
+		entry="${entry#*,}"
+		local valid="${entry%%,*}"
+		entry="${entry#*,}"
+		local metric="${entry%%,*}"
+
+		if [ -n "$gw" ]; then
+			ip -6 route add "$addr" via "$gw" metric "$metric" dev "$device" from "::/128"
+		else
+			ip -6 route add "$addr" metric "$metric" dev "$device"
+		fi
+
+		for prefix in $PREFIXES; do
+			local paddr="${prefix%%,*}"
+			[ -n "$gw" ] && ip -6 route add "$addr" via "$gw" metric "$metric" dev "$device" from "$paddr"
+		done
+	done
+}
+
+teardown_interface() {
+	local device="$1"
+	ip -6 route flush dev "$device"
+	ip -6 address flush dev "$device" scope global
+	update_resolv "$device" ""
+}
+
+case "$2" in
+	bound)
+		teardown_interface "$1"
+		setup_interface "$1"
+	;;
+	informed|updated|rebound|ra-updated)
+		setup_interface "$1"
+	;;
+	stopped|unbound)
+		teardown_interface "$1"
+	;;
+	started)
+		teardown_interface "$1"
+	;;
+esac
+
+# user rules
+[ -f /etc/odhcp6c.user ] && . /etc/odhcp6c.user
+
+exit 0