detect/parse: test sig parsing for more actions

Our unittests were only covering sig parsing for alert actions. As in
environments without LibNet the reject action will not work, we must
ensure that our parser properly fails in such cases, instead of silently
accepting an unsupported action.

Added tests for the reject and drop action.

Task OISF#5496

(cherry picked from commit c81b78f)

src/detect-parse.c

@@ -4151,6 +4151,38 @@ static int SigParseBidirWithSameSrcAndDest02(void)
     PASS;
 }
 
+static int SigParseTestActionReject(void)
+{
+    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
+    FAIL_IF_NULL(de_ctx);
+
+    Signature *sig = DetectEngineAppendSig(
+            de_ctx, "reject tcp 1.2.3.4 any -> !1.2.3.4 any (msg:\"SigParseTest01\"; sid:1;)");
+#ifdef HAVE_LIBNET11
+    FAIL_IF_NULL(sig);
+    FAIL_IF_NOT((sig->action & (ACTION_DROP | ACTION_REJECT)) == (ACTION_DROP | ACTION_REJECT));
+#else
+    FAIL_IF_NOT_NULL(sig);
+#endif
+
+    DetectEngineCtxFree(de_ctx);
+    PASS;
+}
+
+static int SigParseTestActionDrop(void)
+{
+    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
+    FAIL_IF_NULL(de_ctx);
+
+    Signature *sig = DetectEngineAppendSig(
+            de_ctx, "drop tcp 1.2.3.4 any -> !1.2.3.4 any (msg:\"SigParseTest01\"; sid:1;)");
+    FAIL_IF_NULL(sig);
+    FAIL_IF_NOT(sig->action & ACTION_DROP);
+
+    DetectEngineCtxFree(de_ctx);
+    PASS;
+}
+
 #endif /* UNITTESTS */
 
 #ifdef UNITTESTS
@@ -4225,5 +4257,7 @@ void SigParseRegisterTests(void)
             SigParseBidirWithSameSrcAndDest01);
     UtRegisterTest("SigParseBidirWithSameSrcAndDest02",
             SigParseBidirWithSameSrcAndDest02);
+    UtRegisterTest("SigParseTestActionReject", SigParseTestActionReject);
+    UtRegisterTest("SigParseTestActionDrop", SigParseTestActionDrop);
 #endif /* UNITTESTS */
 }