tests: add regression test to avoid shared-net off by one alarming issue

This tests ensures the problem fixed by Wolfgang Steudel cannot reoccur.
See the reference commit for details.

Reference: 5519763ba9
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

tests/Makemodule.am

@@ -8,6 +8,7 @@ TESTS = \
 	tests/alarm-warning \
 	tests/alarm-warning-ranges \
 	tests/alarm-warning-snets \
+	tests/shnet-alarm \
 	tests/bootp \
 	tests/complete \
 	tests/empty \

tests/confs/shnet-alarm

@@ -0,0 +1,31 @@
+shared-network example1 {
+	subnet 10.0.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.0.0.1 10.0.0.20;
+		}
+	}
+	subnet 10.1.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.1.0.1 10.1.0.20;
+		}
+	}
+}
+
+shared-network example2 {
+	subnet 10.2.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.2.0.1 10.2.0.20;
+		}
+	}
+	subnet 10.3.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.3.0.1 10.3.0.20;
+		}
+	}
+}
+
+subnet 10.4.0.0  netmask 255.255.255.0 {
+	pool {
+		range 10.4.0.1 10.4.0.20;
+	}
+}

tests/expected/shnet-alarm

@@ -0,0 +1,3 @@
+CRITICAL: dhcpd-pools: Ranges - crit: 2 warn: 0 ok: 3; | range_crit=2 range_warn=0 range_ok=3
+Shared nets - crit: 1 warn: 0 ok: 1; | snet_crit=1 snet_warn=0 snet_ok=1
+2

tests/leases/shnet-alarm

@@ -0,0 +1,136 @@
+lease 10.0.0.1 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:09;
+}
+
+lease 10.1.0.1 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:00;
+}
+
+lease 10.2.0.0 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:00;
+}
+lease 10.2.0.1 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:01;
+}
+lease 10.2.0.2 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:02;
+}
+lease 10.2.0.3 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:03;
+}
+lease 10.2.0.4 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:04;
+}
+lease 10.2.0.5 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:05;
+}
+
+lease 10.3.0.0 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:00;
+}
+lease 10.3.0.1 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:01;
+}
+lease 10.3.0.2 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:02;
+}
+lease 10.3.0.3 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:03;
+}
+lease 10.3.0.4 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:04;
+}
+lease 10.3.0.5 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:05;
+}
+lease 10.3.0.6 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:06;
+}
+lease 10.3.0.7 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:07;
+}
+lease 10.3.0.8 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:08;
+}
+lease 10.3.0.9 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:09;
+}
+
+lease 10.4.0.0 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:00;
+}
+lease 10.4.0.1 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:01;
+}
+lease 10.4.0.2 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:02;
+}
+lease 10.4.0.3 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:03;
+}
+lease 10.4.0.4 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:04;
+}
+lease 10.4.0.5 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:05;
+}
+lease 10.4.0.6 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:00;
+}
+lease 10.4.0.7 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:01;
+}
+lease 10.4.0.8 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:02;
+}
+lease 10.4.0.9 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:03;
+}
+lease 10.4.0.10 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:04;
+}
+lease 10.4.0.11 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:05;
+}
+lease 10.4.0.12 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:06;
+}
+lease 10.4.0.13 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:07;
+}
+lease 10.4.0.14 {
+  binding state active;
+  hardware ethernet 00:00:00:00:00:08;
+}

tests/shnet-alarm

@@ -0,0 +1,16 @@
+#!/bin/sh
+#
+# Alarm critical ranges only.
+
+IAM=$(basename $0)
+
+if [ ! -d tests/outputs ]; then
+	mkdir tests/outputs
+fi
+
+dhcpd-pools --critical=30 -c $top_srcdir/tests/confs/shnet-alarm \
+	    -l $top_srcdir/tests/leases/shnet-alarm -o tests/outputs/$IAM
+echo $? >> tests/outputs/$IAM
+
+diff -u $top_srcdir/tests/expected/$IAM tests/outputs/$IAM
+exit $?