detect-threshold.h

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/* Copyright (C) 2007-2013 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 Breno Silva <breno.silva@gmail.com>
 */
 
#ifndef __DETECT_THRESHOLD_H__
#define __DETECT_THRESHOLD_H__
 
#include "decode-events.h"
#include "decode-ipv4.h"
#include "decode-tcp.h"
 
#define TYPE_LIMIT     1
#define TYPE_BOTH      2
#define TYPE_THRESHOLD 3
#define TYPE_DETECTION 4
#define TYPE_RATE      5
#define TYPE_SUPPRESS  6
 
#define TRACK_DST      1
#define TRACK_SRC      2
#define TRACK_RULE     3
#define TRACK_EITHER   4 /**< either src or dst: only used by suppress */
#define TRACK_BOTH     5 /* used by rate_filter to match detections by both src and dst addresses */
 
/* Get the new action to take */
#define TH_ACTION_ALERT     0x01
#define TH_ACTION_DROP      0x02
#define TH_ACTION_PASS      0x04
#define TH_ACTION_LOG       0x08
#define TH_ACTION_SDROP     0x10
#define TH_ACTION_REJECT    0x20
 
/**
 * \typedef DetectThresholdData
 * A typedef for DetectThresholdData_
 */
 
typedef struct DetectThresholdData_ {
    uint32_t count;     /**< Event count */
    uint32_t seconds;   /**< Event seconds */
    uint8_t type;       /**< Threshold type : limit , threshold, both, detection_filter */
    uint8_t track;      /**< Track type: by_src, by_dst */
    uint8_t new_action; /**< new_action alert|drop|pass|log|sdrop|reject */
    uint32_t timeout;   /**< timeout */
    uint32_t flags;     /**< flags used to set option */
    DetectAddressHead addrs;
} DetectThresholdData;
 
typedef struct DetectThresholdEntry_ {
    uint32_t sid;           /**< Signature id */
    uint32_t gid;           /**< Signature group id */
 
    uint32_t tv_timeout;    /**< Timeout for new_action (for rate_filter)
                                 its not "seconds", that define the time interval */
    uint32_t seconds;       /**< Event seconds */
    uint32_t current_count; /**< Var for count control */
    int track;          /**< Track type: by_src, by_src */
 
    struct timeval tv1;     /**< Var for time control */
    struct DetectThresholdEntry_ *next;
} DetectThresholdEntry;
 
 
/**
 * Registration function for threshold: keyword
 */
 
void DetectThresholdRegister(void);
 
/**
 * This function registers unit tests for Threshold
 */
 
void ThresholdRegisterTests(void);
 
#endif /*__DETECT_THRESHOLD_H__ */