From 1972a5aee4e980ac2c07ed887716c399f733f396 Mon Sep 17 00:00:00 2001
From: Hadiqa Alamdar Bukhari <hadiqaalamdar@gmail.com>
Date: Tue, 26 Dec 2023 15:00:08 +0500
Subject: [PATCH] test: add test for dns.rcode

Feature #6621
---
 tests/dns/dns-rcode/README.md  |   7 +++++++
 tests/dns/dns-rcode/input.pcap | Bin 0 -> 315 bytes
 tests/dns/dns-rcode/test.rules |   8 ++++++++
 tests/dns/dns-rcode/test.yaml  |  35 +++++++++++++++++++++++++++++++++
 4 files changed, 50 insertions(+)
 create mode 100644 tests/dns/dns-rcode/README.md
 create mode 100644 tests/dns/dns-rcode/input.pcap
 create mode 100644 tests/dns/dns-rcode/test.rules
 create mode 100644 tests/dns/dns-rcode/test.yaml

diff --git a/tests/dns/dns-rcode/README.md b/tests/dns/dns-rcode/README.md
new file mode 100644
index 000000000..d4722474f
--- /dev/null
+++ b/tests/dns/dns-rcode/README.md
@@ -0,0 +1,7 @@
+Test the `dns.rcode` header value.
+
+The PCAP here used the pcap from test dns-eve-v2-udp-nxdomain-soa with
+hex editing header flags to have the DNS query have something in the `rcode`
+section.
+
+Redmine ticket: https://redmine.openinfosecfoundation.org/issues/6621
diff --git a/tests/dns/dns-rcode/input.pcap b/tests/dns/dns-rcode/input.pcap
new file mode 100644
index 0000000000000000000000000000000000000000..8396d3ee6f1a4a5846102099a5a70ece71789c03
GIT binary patch
literal 315
zc-p&ic+)~A1{MYcU}0bcl5Y9k5nmfQ8RCI#5M~e+=VkkT<8;^Cg>D=St_%!;iTMl+
z4uVYVTmp>T92_hxFFYAc8EkiLZ<@-e3^sy+fsr{SFO?-fvp9`8FSP{72Z?J6K<wdR
z;9}rd@>QuP;+O;%$U2QnTntNq5+Dq*2x2MNx@k8%85k@DCoBh91+tRC6lh^n)~Tkc
zjm==|7_nJ*K!AY_B+J~);L4U)tZQg!z?oQHoC0DRGbiWgG6+Js8TrK}xrxOksYPsw
gxrtTzc?Yb)hBC+~0JXO;2$cePfek?SGeH9i08<!6p#T5?

literal 0
Hc-jL100001

diff --git a/tests/dns/dns-rcode/test.rules b/tests/dns/dns-rcode/test.rules
new file mode 100644
index 000000000..1ec3f3905
--- /dev/null
+++ b/tests/dns/dns-rcode/test.rules
@@ -0,0 +1,8 @@
+# Should alert in client direction.
+alert dns any any -> any any (dns.rcode:3; flow:to_client; sid:1; rev:1;)
+
+# Should only alert in client direction.
+alert dns any any -> any any (dns.rcode:!2; flow:to_client; sid:2; rev:1;)
+
+# Should only alert in server direction.
+alert dns any any -> any any (dns.rcode:3; flow:to_server; sid:3; rev:1;)
diff --git a/tests/dns/dns-rcode/test.yaml b/tests/dns/dns-rcode/test.yaml
new file mode 100644
index 000000000..412f042e3
--- /dev/null
+++ b/tests/dns/dns-rcode/test.yaml
@@ -0,0 +1,35 @@
+requires:
+  min-version: 8
+
+checks:
+  - filter:
+      count: 1
+      match:
+        alert.signature_id: 1
+        dest_ip: 10.16.1.11
+        dest_port: 59465
+        direction: to_client
+        app_proto: dns
+        event_type: alert
+        dns.answer.rcode: NXDOMAIN
+        src_ip: 8.8.4.4
+        src_port: 53
+  - filter:
+      count: 1
+      match:
+        alert.signature_id: 2
+        dest_ip: 10.16.1.11
+        dest_port: 59465
+        direction: to_client
+        app_proto: dns
+        event_type: alert
+        dns.answer.rcode: NXDOMAIN
+        src_ip: 8.8.4.4
+        src_port: 53
+  - filter:
+      count: 1
+      match:
+        alert.signature_id: 3
+        direction: to_server
+        app_proto: dns
+        event_type: alert
-- 
2.47.2