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76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* Copyright (C) 2007-2010 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Victor Julien <victor@inliniac.net>
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*
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* Implements the rev keyword
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*/
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#include "suricata-common.h"
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#include "detect.h"
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#include "detect-rev.h"
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#include "util-debug.h"
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#include "util-error.h"
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static int DetectRevSetup (DetectEngineCtx *, Signature *, const char *);
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void DetectRevRegister (void)
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{
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sigmatch_table[DETECT_REV].name = "rev";
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sigmatch_table[DETECT_REV].desc = "set version of the rule";
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sigmatch_table[DETECT_REV].url = DOC_URL DOC_VERSION "/rules/meta.html#rev-revision";
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sigmatch_table[DETECT_REV].Match = NULL;
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sigmatch_table[DETECT_REV].Setup = DetectRevSetup;
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sigmatch_table[DETECT_REV].Free = NULL;
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sigmatch_table[DETECT_REV].RegisterTests = NULL;
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}
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static int DetectRevSetup (DetectEngineCtx *de_ctx, Signature *s, const char *rawstr)
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{
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unsigned long rev = 0;
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char *endptr = NULL;
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rev = strtoul(rawstr, &endptr, 10);
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if (endptr == NULL || *endptr != '\0') {
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SCLogError(SC_ERR_INVALID_SIGNATURE, "invalid character as arg "
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"to rev keyword");
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goto error;
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}
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if (rev >= UINT_MAX) {
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SCLogError(SC_ERR_INVALID_NUMERIC_VALUE, "rev value to high, max %u", UINT_MAX);
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goto error;
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}
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if (rev == 0) {
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SCLogError(SC_ERR_INVALID_NUMERIC_VALUE, "rev value 0 is invalid");
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goto error;
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}
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if (s->rev > 0) {
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SCLogError(SC_ERR_INVALID_RULE_ARGUMENT, "duplicated 'rev' keyword detected");
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goto error;
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}
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s->rev = (uint32_t)rev;
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return 0;
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error:
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return -1;
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}
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