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74 lines
3.4 KiB
C
74 lines
3.4 KiB
C
/* Copyright (C) 2007-2023 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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/**
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* \file
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*
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* \author Anoop Saldanha <anoopsaldanha@gmail.com>
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* \author Victor Julien <victor@inliniac.net>
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*/
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#ifndef SURICATA_DETECT_ENGINE_CONTENT_INSPECTION_H
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#define SURICATA_DETECT_ENGINE_CONTENT_INSPECTION_H
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/** indication to content engine what type of data
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* we're inspecting
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*/
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enum DetectContentInspectionType {
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DETECT_ENGINE_CONTENT_INSPECTION_MODE_PAYLOAD = 0, /* enables 'replace' logic */
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DETECT_ENGINE_CONTENT_INSPECTION_MODE_HEADER, /* indicates a header is being inspected */
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DETECT_ENGINE_CONTENT_INSPECTION_MODE_STREAM, /* enables "stream" inspection logic */
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DETECT_ENGINE_CONTENT_INSPECTION_MODE_FRAME, /* enables "frame" inspection logic */
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DETECT_ENGINE_CONTENT_INSPECTION_MODE_STATE, /* enables "state" - used for buffers coming from
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the app-layer state. */
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};
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#define DETECT_CI_FLAGS_START \
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BIT_U8(0) /**< indication that current buffer is the start of the data */
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#define DETECT_CI_FLAGS_END BIT_U8(1) /**< indication that current buffer
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* is the end of the data */
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#define DETECT_CI_FLAGS_DCE_LE BIT_U8(2) /**< DCERPC record in little endian */
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#define DETECT_CI_FLAGS_DCE_BE BIT_U8(3) /**< DCERPC record in big endian */
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/** buffer is a single, non-streaming, buffer. Data sent to the content
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* inspection function contains both start and end of the data. */
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#define DETECT_CI_FLAGS_SINGLE (DETECT_CI_FLAGS_START|DETECT_CI_FLAGS_END)
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/* implicit "public" just returns true match, false no match */
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bool DetectEngineContentInspection(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
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const Signature *s, const SigMatchData *smd, Packet *p, Flow *f, const uint8_t *buffer,
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const uint32_t buffer_len, const uint32_t stream_start_offset, const uint8_t flags,
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const enum DetectContentInspectionType inspection_mode);
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/** \brief content inspect entry for inspection buffers
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* \param de_ctx detection engine
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* \param det_ctx detect engine thread ctx
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* \param s signature being inspected
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* \param smd array of content inspection matches
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* \param p packet
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* \param f flow
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* \param b inspection buffer to inspect
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* \param inspection_mode inspection mode to use
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* \retval bool true if smd matched the buffer b, false otherwise */
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bool DetectEngineContentInspectionBuffer(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
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const Signature *s, const SigMatchData *smd, Packet *p, Flow *f, const InspectionBuffer *b,
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const enum DetectContentInspectionType inspection_mode);
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void DetectEngineContentInspectionRegisterTests(void);
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#endif /* SURICATA_DETECT_ENGINE_CONTENT_INSPECTION_H */
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