From fdb587d2fc93ea82e69834f0df6b6e78c2bf4557 Mon Sep 17 00:00:00 2001
From: Jason Ish <jason.ish@oisf.net>
Date: Mon, 25 Nov 2019 16:57:06 -0600
Subject: [PATCH] detect-engine: check for tx detect flag support

When registing a detection engine, check that the app-layer
protocol supports tx detect flags. Exit with a fatal
error if it does not as this is a code implementation
error that should be resolved during development.
---
 src/detect-engine.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/detect-engine.c b/src/detect-engine.c
index fac0a8a7a6..f1fca6235c 100644
--- a/src/detect-engine.c
+++ b/src/detect-engine.c
@@ -171,6 +171,13 @@ void DetectAppLayerInspectEngineRegister(const char *name,
         AppProto alproto, uint32_t dir,
         int progress, InspectEngineFuncPtr Callback)
 {
+    if (AppLayerParserIsTxAware(alproto)) {
+        if (!AppLayerParserSupportsTxDetectFlags(alproto)) {
+            FatalError(SC_ERR_INITIALIZATION,
+                "Inspect engine registered for app-layer protocol without "
+                "TX detect flag support: %s", AppProtoToString(alproto));
+        }
+    }
     DetectBufferTypeRegister(name);
     const int sm_list = DetectBufferTypeGetByName(name);
     if (sm_list == -1) {