Adding upstream version 1:7.0.3.upstream/1%7.0.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 180 insertions, 0 deletions

diff --git a/src/detect-nfs-version.c b/src/detect-nfs-version.c
new file mode 100644
index 0000000..5b4f3b8
--- /dev/null
+++ b/src/detect-nfs-version.c
@@ -0,0 +1,180 @@
+/* Copyright (C) 2017-2020 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.
+ */
+
+/**
+ * \file
+ *
+ * \author Victor Julien <victor@inliniac.net>
+ */
+
+#include "suricata-common.h"
+#include "threads.h"
+#include "decode.h"
+#include "detect.h"
+
+#include "detect-parse.h"
+#include "detect-engine.h"
+#include "detect-engine-mpm.h"
+#include "detect-content.h"
+#include "detect-pcre.h"
+#include "detect-nfs-version.h"
+#include "detect-engine-uint.h"
+
+#include "app-layer-parser.h"
+
+#include "flow.h"
+#include "flow-util.h"
+#include "flow-var.h"
+
+#include "util-unittest.h"
+#include "util-unittest-helper.h"
+#include "util-byte.h"
+
+#include "app-layer-nfs-tcp.h"
+#include "rust.h"
+
+
+static int DetectNfsVersionSetup (DetectEngineCtx *, Signature *s, const char *str);
+static void DetectNfsVersionFree(DetectEngineCtx *de_ctx, void *);
+static int g_nfs_request_buffer_id = 0;
+
+static int DetectNfsVersionMatch (DetectEngineThreadCtx *, Flow *,
+                                   uint8_t, void *, void *, const Signature *,
+                                   const SigMatchCtx *);
+
+/**
+ * \brief Registration function for nfs_procedure keyword.
+ */
+void DetectNfsVersionRegister (void)
+{
+    sigmatch_table[DETECT_AL_NFS_VERSION].name = "nfs.version";
+    sigmatch_table[DETECT_AL_NFS_VERSION].alias = "nfs_version";
+    sigmatch_table[DETECT_AL_NFS_VERSION].desc = "match NFS version";
+    sigmatch_table[DETECT_AL_NFS_VERSION].url = "/rules/nfs-keywords.html#version";
+    sigmatch_table[DETECT_AL_NFS_VERSION].AppLayerTxMatch = DetectNfsVersionMatch;
+    sigmatch_table[DETECT_AL_NFS_VERSION].Setup = DetectNfsVersionSetup;
+    sigmatch_table[DETECT_AL_NFS_VERSION].Free = DetectNfsVersionFree;
+    // unit tests were the same as DetectNfsProcedureRegisterTests
+    DetectAppLayerInspectEngineRegister2(
+            "nfs_request", ALPROTO_NFS, SIG_FLAG_TOSERVER, 0, DetectEngineInspectGenericList, NULL);
+
+    g_nfs_request_buffer_id = DetectBufferTypeGetByName("nfs_request");
+
+    SCLogDebug("g_nfs_request_buffer_id %d", g_nfs_request_buffer_id);
+}
+
+/**
+ * \internal
+ * \brief Function to match version of a TX
+ *
+ * \param t       Pointer to thread vars.
+ * \param det_ctx Pointer to the pattern matcher thread.
+ * \param f       Pointer to the current flow.
+ * \param flags   Flags.
+ * \param state   App layer state.
+ * \param s       Pointer to the Signature.
+ * \param m       Pointer to the sigmatch that we will cast into
+ *                DetectU32Data.
+ *
+ * \retval 0 no match.
+ * \retval 1 match.
+ */
+static int DetectNfsVersionMatch (DetectEngineThreadCtx *det_ctx,
+                                   Flow *f, uint8_t flags, void *state,
+                                   void *txv, const Signature *s,
+                                   const SigMatchCtx *ctx)
+{
+    SCEnter();
+
+    const DetectU32Data *dd = (const DetectU32Data *)ctx;
+    uint32_t version;
+    rs_nfs_tx_get_version(txv, &version);
+    SCLogDebug("version %u mode %u lo %u hi %u", version, dd->mode, dd->arg1, dd->arg2);
+    if (DetectU32Match(version, dd))
+        SCReturnInt(1);
+    SCReturnInt(0);
+}
+
+/**
+ * \internal
+ * \brief Function to parse options passed via tls validity keywords.
+ *
+ * \param rawstr Pointer to the user provided options.
+ *
+ * \retval dd pointer to DetectU32Data on success.
+ * \retval NULL on failure.
+ */
+static DetectU32Data *DetectNfsVersionParse(const char *rawstr)
+{
+    return rs_detect_u32_parse_inclusive(rawstr);
+}
+
+
+
+/**
+ * \brief Function to add the parsed tls validity field into the current signature.
+ *
+ * \param de_ctx Pointer to the Detection Engine Context.
+ * \param s      Pointer to the Current Signature.
+ * \param rawstr Pointer to the user provided flags options.
+ * \param type   Defines if this is notBefore or notAfter.
+ *
+ * \retval 0 on Success.
+ * \retval -1 on Failure.
+ */
+static int DetectNfsVersionSetup (DetectEngineCtx *de_ctx, Signature *s,
+                                   const char *rawstr)
+{
+    SCLogDebug("\'%s\'", rawstr);
+
+    if (DetectSignatureSetAppProto(s, ALPROTO_NFS) != 0)
+        return -1;
+
+    DetectU32Data *dd = DetectNfsVersionParse(rawstr);
+    if (dd == NULL) {
+        SCLogError("Parsing \'%s\' failed", rawstr);
+        return -1;
+    }
+
+    /* okay so far so good, lets get this into a SigMatch
+     * and put it in the Signature. */
+    SigMatch *sm = SigMatchAlloc();
+    if (sm == NULL)
+        goto error;
+
+    sm->type = DETECT_AL_NFS_VERSION;
+    sm->ctx = (void *)dd;
+
+    SCLogDebug("low %u hi %u", dd->arg1, dd->arg2);
+    SigMatchAppendSMToList(s, sm, g_nfs_request_buffer_id);
+    return 0;
+
+error:
+    DetectNfsVersionFree(de_ctx, dd);
+    return -1;
+}
+
+/**
+ * \internal
+ * \brief Function to free memory associated with DetectU32Data.
+ *
+ * \param de_ptr Pointer to DetectU32Data.
+ */
+void DetectNfsVersionFree(DetectEngineCtx *de_ctx, void *ptr)
+{
+    rs_detect_u32_free(ptr);
+}