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58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/* Copyright (C) 2023 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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#include "detect-requires.h"
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#include "suricata-common.h"
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#include "detect-engine.h"
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#include "rust.h"
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/* Set to true if unknown requirements should be ingored. In Suricata
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* 8, unknown requirements are treated as unsatisfied requirements. */
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static int g_ignore_unknown_requirements = 0;
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static int DetectRequiresSetup(DetectEngineCtx *de_ctx, Signature *s, const char *rawstr)
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{
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if (de_ctx->requirements == NULL) {
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de_ctx->requirements = (void *)SCDetectRequiresStatusNew();
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BUG_ON(de_ctx->requirements == NULL);
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}
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const char *errmsg = NULL;
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int res = SCDetectCheckRequires(
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rawstr, PROG_VER, &errmsg, de_ctx->requirements, g_ignore_unknown_requirements);
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if (res == -1) {
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// The requires expression is bad, log an error.
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SCLogError("%s: %s", errmsg, rawstr);
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de_ctx->sigerror = errmsg;
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} else if (res < -1) {
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// This Suricata instance didn't meet the requirements.
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SCLogInfo("Suricata did not meet the rule requirements: %s: %s", errmsg, rawstr);
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return -4;
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}
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return res;
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}
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void DetectRequiresRegister(void)
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{
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ConfGetBool("ignore-unknown-requirements", &g_ignore_unknown_requirements);
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sigmatch_table[DETECT_REQUIRES].name = "requires";
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sigmatch_table[DETECT_REQUIRES].desc = "require Suricata version or features";
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sigmatch_table[DETECT_REQUIRES].url = "/rules/meta-keywords.html#requires";
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sigmatch_table[DETECT_REQUIRES].Setup = DetectRequiresSetup;
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}
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