suricata checkin based on commit id a4bce14770beee46a537eda3c3f6e8e8565d5d0a

Change-Id: I9a214fa0ee95e58fc640e50bd604dac7f42db48f

1 files changed, 221 insertions, 0 deletions

diff --git a/framework/src/suricata/src/detect-priority.c b/framework/src/suricata/src/detect-priority.c
new file mode 100644
index 00000000..5bb0359f
--- /dev/null
+++ b/framework/src/suricata/src/detect-priority.c
@@ -0,0 +1,221 @@
+/* Copyright (C) 2007-2010 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>
+ * \author Anoop Saldanha <anoopsaldanha@gmail.com>
+ *
+ * Implements the priority keyword
+ */
+
+#include "suricata-common.h"
+#include "detect.h"
+#include "detect-parse.h"
+#include "detect-engine.h"
+#include "detect-engine-mpm.h"
+#include "util-error.h"
+#include "util-debug.h"
+#include "util-unittest.h"
+
+#define DETECT_PRIORITY_REGEX "^\\s*(\\d+|\"\\d+\")\\s*$"
+
+static pcre *regex = NULL;
+static pcre_extra *regex_study = NULL;
+
+static int DetectPrioritySetup (DetectEngineCtx *, Signature *, char *);
+void SCPriorityRegisterTests(void);
+
+/**
+ * \brief Registers the handler functions for the "priority" keyword
+ */
+void DetectPriorityRegister (void)
+{
+    const char *eb = NULL;
+    int eo;
+    int opts = 0;
+
+    sigmatch_table[DETECT_PRIORITY].name = "priority";
+    sigmatch_table[DETECT_PRIORITY].desc = "rules with a higher priority will be examined first";
+    sigmatch_table[DETECT_PRIORITY].url = "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Meta-settings#Priority";
+    sigmatch_table[DETECT_PRIORITY].Match = NULL;
+    sigmatch_table[DETECT_PRIORITY].Setup = DetectPrioritySetup;
+    sigmatch_table[DETECT_PRIORITY].Free = NULL;
+    sigmatch_table[DETECT_PRIORITY].RegisterTests = SCPriorityRegisterTests;
+
+    regex = pcre_compile(DETECT_PRIORITY_REGEX, opts, &eb, &eo, NULL);
+    if (regex == NULL) {
+        SCLogError(SC_ERR_PCRE_COMPILE, "Compile of \"%s\" failed at offset %" PRId32 ": %s",
+                   DETECT_PRIORITY_REGEX, eo, eb);
+        goto end;
+    }
+
+    regex_study = pcre_study(regex, 0, &eb);
+    if (eb != NULL) {
+        SCLogError(SC_ERR_PCRE_STUDY, "pcre study failed: %s", eb);
+        goto end;
+    }
+
+ end:
+    return;
+}
+
+static int DetectPrioritySetup (DetectEngineCtx *de_ctx, Signature *s, char *rawstr)
+{
+    char copy_str[128] = "";
+
+#define MAX_SUBSTRINGS 30
+    int ret = 0;
+    int ov[MAX_SUBSTRINGS];
+
+    ret = pcre_exec(regex, regex_study, rawstr, strlen(rawstr), 0, 0, ov, 30);
+    if (ret < 0) {
+        SCLogError(SC_ERR_PCRE_MATCH, "Invalid Priority in Signature "
+                     "- %s", rawstr);
+        return -1;
+    }
+
+    ret = pcre_copy_substring((char *)rawstr, ov, 30, 1, copy_str, sizeof(copy_str));
+    if (ret < 0) {
+        SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_copy_substring failed");
+        return -1;
+    }
+
+    long prio = 0;
+    char *endptr = NULL;
+    prio = strtol(copy_str, &endptr, 10);
+    if (endptr == NULL || *endptr != '\0') {
+        SCLogError(SC_ERR_INVALID_SIGNATURE, "Saw an invalid character as arg "
+                   "to priority keyword");
+        return -1;
+    }
+    /* if we have reached here, we have had a valid priority.  Assign it */
+    s->prio = prio;
+
+    return 0;
+}
+
+/*------------------------------Unittests-------------------------------------*/
+
+#ifdef UNITTESTS
+
+int DetectPriorityTest01()
+{
+    int result = 0;
+
+    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
+    if (de_ctx == NULL) {
+        goto end;
+    }
+
+    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
+                               "(msg:\"Priority test\"; priority:2; sid:1;)");
+    if (de_ctx->sig_list != NULL)
+        result = 1;
+
+    DetectEngineCtxFree(de_ctx);
+
+end:
+    return result;
+}
+
+int DetectPriorityTest02()
+{
+    int result = 0;
+    Signature *last = NULL;
+    Signature *sig = NULL;
+
+    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
+    if (de_ctx == NULL) {
+        goto end;
+    }
+
+    sig = SigInit(de_ctx, "alert tcp any any -> any any "
+                  "(msg:\"Priority test\"; priority:1; sid:1;)");
+    de_ctx->sig_list = last = sig;
+    if (sig == NULL) {
+        result = 0;
+    } else {
+        result = 1;
+        result &= (sig->prio == 1);
+    }
+
+    sig = SigInit(de_ctx, "alert tcp any any -> any any "
+                  "(msg:\"Priority test\"; priority:boo; sid:1;)");
+    if (last != NULL)
+        last->next = sig;
+    result &= (sig == NULL);
+
+    sig = SigInit(de_ctx, "alert tcp any any -> any any "
+                  "(msg:\"Priority test\"; priority:10boo; sid:1;)");
+    if (last != NULL)
+        last->next = sig;
+    result &= (sig == NULL);
+
+    sig = SigInit(de_ctx, "alert tcp any any -> any any "
+                  "(msg:\"Priority test\"; priority:b10oo; sid:1;)");
+    if (last != NULL)
+        last->next = sig;
+    result &= (sig == NULL);
+
+    sig = SigInit(de_ctx, "alert tcp any any -> any any "
+                  "(msg:\"Priority test\"; priority:boo10; sid:1;)");
+    if (last != NULL)
+        last->next = sig;
+    result &= (sig == NULL);
+
+    sig = SigInit(de_ctx, "alert tcp any any -> any any "
+                  "(msg:\"Priority test\"; priority:-1; sid:1;)");
+    if (last != NULL)
+        last->next = sig;
+    result &= (sig == NULL);
+
+    sig = SigInit(de_ctx, "alert tcp any any -> any any "
+                  "(msg:\"Priority test\"; sid:1;)");
+    if (last != NULL)
+        last->next = sig;
+    if (sig == NULL) {
+        result &= 0;
+    } else {
+        result &= (sig->prio == 3);
+    }
+
+    SigCleanSignatures(de_ctx);
+    DetectEngineCtxFree(de_ctx);
+
+end:
+    return result;
+}
+
+
+#endif /* UNITTESTS */
+
+/**
+ * \brief This function registers unit tests for Classification Config API.
+ */
+void SCPriorityRegisterTests(void)
+{
+
+#ifdef UNITTESTS
+
+    UtRegisterTest("DetectPriorityTest01", DetectPriorityTest01, 1);
+    UtRegisterTest("DetectPriorityTest02", DetectPriorityTest02, 1);
+
+#endif /* UNITTESTS */
+
+}