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/* Copyright (C) 2007-2014 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.
*/
/** \mainpage Doxygen documentation
*
* \section intro_sec Introduction
*
* The Suricata Engine is an Open Source Next Generation Intrusion Detection
* and Prevention Engine. This engine is not intended to just replace or
* emulate the existing tools in the industry, but will bring new ideas and
* technologies to the field.
*
* \section dev_doc Developer documentation
*
* You've reach the automically generated documentation of Suricata. This
* document contains information about architecture and code structure. It
* is attended for developers wanting to understand or contribute to Suricata.
*
* \subsection modules Modules
*
* Documentation is generate from comments placed in all parts of the code.
* But you will also find some groups describing specific functional parts:
* - \ref decode
* - \ref httplayer
* - \ref sigstate
* - \ref threshold
*
* \section archi Architecture
*
* \subsection datastruct Data structures
*
* Regarding matching, there is three main data structures which are:
* - ::Packet: Data relative to an individual packet with information about
* linked structure such as the ::Flow the ::Packet belongs to.
* - ::Flow: Information about a flow for example a TCP session
* - ::StreamMsg: structure containing the reassembled data
*
* \subsection runmode Running mode
*
* Suricata is multithreaded and running modes define how the different
* threads are working together. You can see util-runmodes.c for example
* of running mode.
*/
/**
* \file
*
* \author Victor Julien <victor@inliniac.net>
*/
#ifndef __SURICATA_H__
#define __SURICATA_H__
#include "suricata-common.h"
#include "packet-queue.h"
#include "data-queue.h"
/* the name of our binary */
#define PROG_NAME "Suricata"
#define PROG_VER "3.0dev"
/* workaround SPlint error (don't know __gnuc_va_list) */
#ifdef S_SPLINT_S
# include <err.h>
# define CONFIG_DIR "/etc/suricata"
#endif
#define DEFAULT_CONF_FILE CONFIG_DIR "/suricata.yaml"
#define DEFAULT_PID_DIR LOCAL_STATE_DIR "/run/"
#define DEFAULT_PID_BASENAME "suricata.pid"
#define DEFAULT_PID_FILENAME DEFAULT_PID_DIR DEFAULT_PID_BASENAME
/* runtime engine control flags */
#define SURICATA_STOP (1 << 0) /**< gracefully stop the engine: process all
outstanding packets first */
#define SURICATA_KILL (1 << 1) /**< shut down asap, discarding outstanding
packets. */
#define SURICATA_DONE (1 << 2) /**< packets capture ended */
/* Engine stage/status*/
enum {
SURICATA_INIT = 0,
SURICATA_RUNTIME,
SURICATA_DEINIT
};
/* Engine is acting as */
enum EngineMode {
ENGINE_MODE_IDS,
ENGINE_MODE_IPS,
};
void EngineModeSetIPS(void);
void EngineModeSetIDS(void);
int EngineModeIsIPS(void);
int EngineModeIsIDS(void);
/* Box is acting as router */
enum {
SURI_HOST_IS_SNIFFER_ONLY,
SURI_HOST_IS_ROUTER,
};
#define IS_SURI_HOST_MODE_SNIFFER_ONLY(host_mode) ((host_mode) == SURI_HOST_IS_SNIFFER_ONLY)
#define IS_SURI_HOST_MODE_ROUTER(host_mode) ((host_mode) == SURI_HOST_IS_ROUTER)
/* queue's between various other threads
* XXX move to the TmQueue structure later
*/
PacketQueue trans_q[256];
SCDQDataQueue data_queues[256];
typedef struct SCInstance_ {
int run_mode;
char pcap_dev[128];
char *sig_file;
int sig_file_exclusive;
char *pid_filename;
char *regex_arg;
char *keyword_info;
char *runmode_custom_mode;
#ifndef OS_WIN32
char *user_name;
char *group_name;
uint8_t do_setuid;
uint8_t do_setgid;
uint32_t userid;
uint32_t groupid;
#endif /* OS_WIN32 */
int delayed_detect;
int disabled_detect;
int daemon;
int offline;
int verbose;
int checksum_validation;
struct timeval start_time;
char *log_dir;
} SCInstance;
/* memset to zeros, and mutex init! */
void GlobalInits();
extern volatile uint8_t suricata_ctl_flags;
/* uppercase to lowercase conversion lookup table */
uint8_t g_u8_lowercasetable[256];
extern char *conf_filename;
/* marco to do the actual lookup */
//#define u8_tolower(c) g_u8_lowercasetable[(c)]
// these 2 are slower:
//#define u8_tolower(c) ((c) >= 'A' && (c) <= 'Z') ? g_u8_lowercasetable[(c)] : (c)
//#define u8_tolower(c) (((c) >= 'A' && (c) <= 'Z') ? ((c) + ('a' - 'A')) : (c))
/* this is faster than the table lookup */
#include <ctype.h>
#define u8_tolower(c) tolower((uint8_t)(c))
void EngineStop(void);
void EngineKill(void);
void EngineDone(void);
/* live rule swap required this to be made static */
void SignalHandlerSigusr2(int);
void SignalHandlerSigusr2EngineShutdown(int);
void SignalHandlerSigusr2Idle(int sig);
int RunmodeIsUnittests(void);
int RunmodeGetCurrent(void);
int IsRuleReloadSet(int quiet);
extern int run_mode;
#endif /* __SURICATA_H__ */
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