test: add test for dns.rrtype

Feature #6666

Author: hadiqaalamdar

tests/dns/dns-rrtype/README.md

@@ -0,0 +1,5 @@
+Test the `dns.rrtype` value.
+
+The PCAP here was reused from ./tests/dns/dns-eve-empty-format/input.pcap
+
+Redmine ticket: https://redmine.openinfosecfoundation.org/issues/6666

tests/dns/dns-rrtype/test.rules

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+# Only alert on requests.
+alert dns any any -> any any (dns.rrtype:1; flow:to_server; sid:1; rev:1;)
+
+# Only alert on responses.
+alert dns any any -> any any (dns.rrtype:1; flow:to_client; sid:2; rev:1;)
+
+# Negated rrtype value
+alert dns any any -> any any (dns.rrtype:!2; flow:to_client; sid:3; rev:1;)

tests/dns/dns-rrtype/test.yaml

@@ -0,0 +1,42 @@
+requires:
+  min-version: 8
+
+pcap: ../dns-eve-empty-format/input.pcap
+
+checks:
+  - filter:
+      count: 1
+      match:
+        alert.signature_id: 1
+        dest_ip: 10.16.1.1
+        dest_port: 53
+        direction: to_server
+        app_proto: dns
+        event_type: alert
+        dns.query[0].rrtype: A
+        src_ip: 10.16.1.11
+        src_port: 57634
+  - filter:
+      count: 1
+      match:
+        alert.signature_id: 2
+        dest_ip: 10.16.1.11
+        dest_port: 33458
+        direction: to_client
+        app_proto: dns
+        event_type: alert
+        dns.answer.rrtype: A
+        src_ip: 10.16.1.1
+        src_port: 53
+  - filter:
+      count: 1
+      match:
+        alert.signature_id: 3
+        dest_ip: 10.16.1.11
+        dest_port: 33458
+        direction: to_client
+        app_proto: dns
+        event_type: alert
+        dns.answer.rrtype: A
+        src_ip: 10.16.1.1
+        src_port: 53