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/* Copyright (C) 2023 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 "detect-requires.h"
#include "suricata-common.h"
#include "detect-engine.h"
#include "rust.h"
static int DetectRequiresSetup(DetectEngineCtx *de_ctx, Signature *s, const char *rawstr)
{
if (de_ctx->requirements == NULL) {
de_ctx->requirements = (void *)SCDetectRequiresStatusNew();
BUG_ON(de_ctx->requirements == NULL);
}
const char *errmsg = NULL;
int res = SCDetectCheckRequires(rawstr, PROG_VER, &errmsg, de_ctx->requirements);
if (res == -1) {
// The requires expression is bad, log an error.
SCLogError("%s: %s", errmsg, rawstr);
de_ctx->sigerror = errmsg;
} else if (res < -1) {
// This Suricata instance didn't meet the requirements.
SCLogInfo("Suricata did not meet the rule requirements: %s: %s", errmsg, rawstr);
return -4;
}
return res;
}
void DetectRequiresRegister(void)
{
sigmatch_table[DETECT_REQUIRES].name = "requires";
sigmatch_table[DETECT_REQUIRES].desc = "require Suricata version or features";
sigmatch_table[DETECT_REQUIRES].url = "/rules/meta-keywords.html#requires";
sigmatch_table[DETECT_REQUIRES].Setup = DetectRequiresSetup;
}
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