DNS lookups should not be case sensitive.

- On-the-wire gossip messages are sorted case sensitive, but in memory they are sorted case-insensitive.
- Add test for case insensitive match on multiple names.

test/245_dns_case_insensitive_test.sh

@@ -0,0 +1,31 @@
+#! /bin/bash
+
+. ./config.sh
+
+C1=10.2.0.78
+C2=10.2.0.79
+C3=10.2.0.80
+
+start_suite "DNS lookup case (in)sensitivity"
+
+weave_on $HOST1 launch
+
+start_container_with_dns $HOST1        --name=test
+
+start_container $HOST1 $C1/24 --name=seeone
+assert_dns_record $HOST1 test seeone.weave.local $C1
+assert_dns_record $HOST1 test SeeOne.weave.local $C1
+assert_dns_record $HOST1 test SEEONE.weave.local $C1
+
+start_container $HOST1 $C2/24 --name=SeEtWo
+assert_dns_record $HOST1 test seetwo.weave.local $C2
+assert_dns_record $HOST1 test SeeTwo.weave.local $C2
+assert_dns_record $HOST1 test SEETWO.weave.local $C2
+
+start_container $HOST1 $C3/24 --name=seetwo
+assert_dns_record $HOST1 test seetwo.weave.local $C2 $C3
+assert_dns_record $HOST1 test SeeTwo.weave.local $C2 $C3
+assert_dns_record $HOST1 test SEETWO.weave.local $C2 $C3
+assert "exec_on $HOST1 test dig +short seetwo.weave.local A | grep -v ';;' | wc -l" 2
+
+end_suite

test/config.sh

@@ -188,7 +188,7 @@ assert_dns_record() {
 
     [ -z "$DEBUG" ] || greyly echo "Checking whether the IPs '$@' exists at $host:$container"
     for ip in "$@" ; do
-        assert "exec_on $host $container getent hosts $ip | tr -s ' '" "$ip $name"
+        assert "exec_on $host $container getent hosts $ip | tr -s ' ' | tr '[:upper:]' '[:lower:]'" "$(echo $ip $name | tr '[:upper:]' '[:lower:]')"
     done
 }