From: Philippe Antoine <pantoine@oisf.net>
Date: Wed, 27 Aug 2025 20:42:57 +0000 (+0200)
Subject: dns: add test with response with data length 0
X-Git-Tag: suricata-7.0.12~14
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fpull%2F2630%2Fhead;p=thirdparty%2Fsuricata-verify.git

dns: add test with response with data length 0

Ticket: 7574
---

diff --git a/tests/dns/dns-answer-emptydata/README.md b/tests/dns/dns-answer-emptydata/README.md
new file mode 100644
index 000000000..2f0b0e88e
--- /dev/null
+++ b/tests/dns/dns-answer-emptydata/README.md
@@ -0,0 +1,5 @@
+Test that we do not fail parsing on DNS answer with Data Length 0 `dns.resp.len == 0`
+
+Ticket: https://redmine.openinfosecfoundation.org/issues/7574
+
+Pcap from ticket
diff --git a/tests/dns/dns-answer-emptydata/input.pcap b/tests/dns/dns-answer-emptydata/input.pcap
new file mode 100644
index 000000000..7a57bc256
Binary files /dev/null and b/tests/dns/dns-answer-emptydata/input.pcap differ
diff --git a/tests/dns/dns-answer-emptydata/test.rules b/tests/dns/dns-answer-emptydata/test.rules
new file mode 100644
index 000000000..a6cb2a2f2
--- /dev/null
+++ b/tests/dns/dns-answer-emptydata/test.rules
@@ -0,0 +1,2 @@
+alert dns any any -> any any (msg:"SURICATA DNS malformed request data"; flow:to_server; app-layer-event:dns.malformed_data; classtype:protocol-command-decode; sid:2240002; rev:2;)
+alert dns any any -> any any (msg:"SURICATA DNS malformed response data"; flow:to_client; app-layer-event:dns.malformed_data; classtype:protocol-command-decode; sid:2240003; rev:2;)
diff --git a/tests/dns/dns-answer-emptydata/test.yaml b/tests/dns/dns-answer-emptydata/test.yaml
new file mode 100644
index 000000000..cf28e97e6
--- /dev/null
+++ b/tests/dns/dns-answer-emptydata/test.yaml
@@ -0,0 +1,9 @@
+checks:
+  - filter:
+      count: 2
+      match:
+        event_type: dns
+  - filter:
+      count: 0
+      match:
+        event_type: alert