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suricata/src/detect-rev.c

150 lines
3.8 KiB
C

/* 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>
*
* Implements the rev keyword
*/
#include "suricata-common.h"
#include "detect.h"
#include "detect-engine.h"
#include "detect-parse.h"
#include "detect-rev.h"
#include "util-byte.h"
#include "util-debug.h"
#include "util-error.h"
#include "util-unittest.h"
static int DetectRevSetup (DetectEngineCtx *, Signature *, const char *);
#ifdef UNITTESTS
static void DetectRevRegisterTests(void);
#endif
void DetectRevRegister (void)
{
sigmatch_table[DETECT_REV].name = "rev";
sigmatch_table[DETECT_REV].desc = "set version of the rule";
sigmatch_table[DETECT_REV].url = "/rules/meta.html#rev-revision";
sigmatch_table[DETECT_REV].Setup = DetectRevSetup;
#ifdef UNITTESTS
sigmatch_table[DETECT_REV].RegisterTests = DetectRevRegisterTests;
#endif
}
static int DetectRevSetup (DetectEngineCtx *de_ctx, Signature *s, const char *rawstr)
{
uint32_t rev = 0;
if (ByteExtractStringUint32(&rev, 10, strlen(rawstr), rawstr) <= 0) {
SCLogError("invalid input as arg to rev keyword");
goto error;
}
if (rev == 0) {
SCLogError("rev value 0 is invalid");
goto error;
}
if (s->rev > 0) {
SCLogError("duplicated 'rev' keyword detected");
goto error;
}
s->rev = rev;
return 0;
error:
return -1;
}
#ifdef UNITTESTS
/**
* \test RevTestParse01 is a test for a valid rev value
*/
static int RevTestParse01(void)
{
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
FAIL_IF_NULL(de_ctx);
Signature *s =
DetectEngineAppendSig(de_ctx, "alert tcp 1.2.3.4 any -> any any (sid:1; rev:1;)");
FAIL_IF_NULL(s);
FAIL_IF(s->rev != 1);
DetectEngineCtxFree(de_ctx);
PASS;
}
/**
* \test RevTestParse02 is a test for an invalid rev value
*/
static int RevTestParse02(void)
{
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
FAIL_IF_NULL(de_ctx);
FAIL_IF_NOT_NULL(
DetectEngineAppendSig(de_ctx, "alert tcp 1.2.3.4 any -> any any (sid:1; rev:a;)"));
DetectEngineCtxFree(de_ctx);
PASS;
}
/**
* \test RevTestParse03 is a test for a rev containing of a single quote.
*/
static int RevTestParse03(void)
{
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
FAIL_IF_NULL(de_ctx);
FAIL_IF_NOT_NULL(DetectEngineAppendSig(
de_ctx, "alert tcp any any -> any any (content:\"ABC\"; rev:\";)"));
DetectEngineCtxFree(de_ctx);
PASS;
}
/**
* \test RevTestParse04 is a test for a rev value of 0
*/
static int RevTestParse04(void)
{
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
FAIL_IF_NULL(de_ctx);
FAIL_IF_NOT_NULL(DetectEngineAppendSig(
de_ctx, "alert tcp any any -> any any (content:\"ABC\"; rev:0;)"));
DetectEngineCtxFree(de_ctx);
PASS;
}
/**
* \brief this function registers unit tests for Rev
*/
static void DetectRevRegisterTests(void)
{
UtRegisterTest("RevTestParse01", RevTestParse01);
UtRegisterTest("RevTestParse02", RevTestParse02);
UtRegisterTest("RevTestParse03", RevTestParse03);
UtRegisterTest("RevTestParse04", RevTestParse04);
}
#endif /* UNITTESTS */