1 files changed, 113 insertions, 0 deletions
diff --git a/src/tests/detect-snmp-community.c b/src/tests/detect-snmp-community.c
new file mode 100644
index 0000000..1eda883
--- /dev/null
+++ b/src/tests/detect-snmp-community.c
@@ -0,0 +1,113 @@
+/* Copyright (C) 2019 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include "util-unittest.h"
+#include "util-unittest-helper.h"
+#include "app-layer-parser.h"
+#include "detect-engine.h"
+#include "detect-parse.h"
+#include "flow-util.h"
+#include "stream-tcp.h"
+#include "detect-engine-build.h"
+#include "detect-engine-alert.h"
+
+static int DetectSNMPCommunityTest(void)
+{
+    AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
+    DetectEngineThreadCtx *det_ctx = NULL;
+    DetectEngineCtx *de_ctx = NULL;
+    Flow f;
+    Packet *p;
+    TcpSession tcp;
+    ThreadVars tv;
+    Signature *s;
+
+    uint8_t request[] = {
+        0x30, 0x27, 0x02, 0x01, 0x01, 0x04, 0x0b, 0x5b,
+        0x52, 0x30, 0x5f, 0x43, 0x40, 0x63, 0x74, 0x69,
+        0x21, 0x5d, 0xa1, 0x15, 0x02, 0x04, 0x2b, 0x13,
+        0x3f, 0x85, 0x02, 0x01, 0x00, 0x02, 0x01, 0x00,
+        0x30, 0x07, 0x30, 0x05, 0x06, 0x01, 0x01, 0x05,
+        0x00
+    };
+
+    /* Setup flow. */
+    memset(&f, 0, sizeof(Flow));
+    memset(&tcp, 0, sizeof(TcpSession));
+    memset(&tv, 0, sizeof(ThreadVars));
+    p = UTHBuildPacket(request, sizeof(request), IPPROTO_UDP);
+    FLOW_INITIALIZE(&f);
+    f.alproto = ALPROTO_SNMP;
+    f.protoctx = (void *)&tcp;
+    f.proto = IPPROTO_UDP;
+    f.protomap = FlowGetProtoMapping(f.proto);
+    f.flags |= FLOW_IPV4;
+    p->flow = &f;
+    p->flags |= PKT_HAS_FLOW | PKT_STREAM_EST;
+    p->flowflags |= FLOW_PKT_TOSERVER | FLOW_PKT_ESTABLISHED;
+    StreamTcpInitConfig(true);
+
+    de_ctx = DetectEngineCtxInit();
+    FAIL_IF_NULL(de_ctx);
+
+    /* This rule should match. */
+    s = DetectEngineAppendSig(de_ctx,
+        "alert snmp any any -> any any ("
+        "msg:\"SNMP Test Rule\"; "
+        "snmp.community; content:\"[R0_C@cti!]\"; "
+        "sid:1; rev:1;)");
+    FAIL_IF_NULL(s);
+
+    /* This rule should not match. */
+    s = DetectEngineAppendSig(de_ctx,
+        "alert snmp any any -> any any ("
+        "msg:\"SNMP Test Rule\"; "
+        "snmp.community; content:\"private\"; "
+        "sid:2; rev:1;)");
+    FAIL_IF_NULL(s);
+
+    SigGroupBuild(de_ctx);
+    DetectEngineThreadCtxInit(&tv, (void *)de_ctx, (void *)&det_ctx);
+
+    int r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_SNMP,
+                        STREAM_TOSERVER, request, sizeof(request));
+    FAIL_IF(r != 0);
+
+    /* Check that we have app-layer state. */
+    FAIL_IF_NULL(f.alstate);
+
+    SigMatchSignatures(&tv, de_ctx, det_ctx, p);
+    FAIL_IF(!PacketAlertCheck(p, 1));
+    FAIL_IF(PacketAlertCheck(p, 2));
+
+    /* Cleanup. */
+    AppLayerParserThreadCtxFree(alp_tctx);
+    DetectEngineThreadCtxDeinit(&tv, det_ctx);
+    SigGroupCleanup(de_ctx);
+    DetectEngineCtxFree(de_ctx);
+    StreamTcpFreeConfig(true);
+    FLOW_DESTROY(&f);
+    UTHFreePacket(p);
+
+    PASS;
+}
+
+static void DetectSNMPCommunityRegisterTests(void)
+{
+    UtRegisterTest("DetectSNMPCommunityTest",
+        DetectSNMPCommunityTest);
+}