273 lines
9.0 KiB
Plaintext
273 lines
9.0 KiB
Plaintext
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License Version 2 as
|
|
* published by the Free Software Foundation. You may not use, modify or
|
|
* distribute this program under any other version of the GNU General
|
|
* Public License.
|
|
*
|
|
* 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
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright (C) 2005-2010 Sourcefire, Inc.
|
|
*
|
|
* Author: Steven Sturges
|
|
*
|
|
* Dynamic Library Loading for Snort
|
|
*
|
|
*/
|
|
#ifndef _SF_DYNAMIC_PREPROCESSOR_H_
|
|
#define _SF_DYNAMIC_PREPROCESSOR_H_
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <ctype.h>
|
|
#ifdef HAVE_WCHAR_H
|
|
#include <wchar.h>
|
|
#endif
|
|
#include "sf_dynamic_meta.h"
|
|
#include "ipv6_port.h"
|
|
#include "sf_types.h"
|
|
|
|
/* specifies that a function does not return
|
|
* used for quieting Visual Studio warnings
|
|
*/
|
|
#ifdef WIN32
|
|
#if _MSC_VER >= 1400
|
|
#define NORETURN __declspec(noreturn)
|
|
#else
|
|
#define NORETURN
|
|
#endif
|
|
#else
|
|
#define NORETURN
|
|
#endif
|
|
|
|
#ifdef PERF_PROFILING
|
|
#ifndef PROFILE_PREPROCS_NOREDEF /* Don't redefine this from the main area */
|
|
#ifdef PROFILING_PREPROCS
|
|
#undef PROFILING_PREPROCS
|
|
#endif
|
|
#define PROFILING_PREPROCS _dpd.profilingPreprocsFunc()
|
|
#endif
|
|
#endif
|
|
|
|
#define PREPROCESSOR_DATA_VERSION 5
|
|
|
|
#include "sf_dynamic_common.h"
|
|
#include "sf_dynamic_engine.h"
|
|
#include "stream_api.h"
|
|
#include "str_search.h"
|
|
#include "obfuscation.h"
|
|
#include "sfportobject.h"
|
|
|
|
#define MINIMUM_DYNAMIC_PREPROC_ID 10000
|
|
typedef void (*PreprocessorInitFunc)(char *);
|
|
typedef void * (*AddPreprocFunc)(void (*func)(void *, void *), u_int16_t, u_int32_t, u_int32_t);
|
|
typedef void (*AddPreprocExit)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
|
|
typedef void (*AddPreprocRestart)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
|
|
typedef void (*AddPreprocConfCheck)(void (*func) (void));
|
|
typedef int (*AlertQueueAdd)(unsigned int, unsigned int, unsigned int,
|
|
unsigned int, unsigned int, char *, void *);
|
|
typedef uint32_t (*GenSnortEvent)(Packet *p, uint32_t gid, uint32_t sid, uint32_t rev,
|
|
uint32_t classification, uint32_t priority, char *msg);
|
|
#ifdef SNORT_RELOAD
|
|
typedef void (*PreprocessorReloadFunc)(char *);
|
|
typedef int (*PreprocessorReloadVerifyFunc)(void);
|
|
typedef void * (*PreprocessorReloadSwapFunc)(void);
|
|
typedef void (*PreprocessorReloadSwapFreeFunc)(void *);
|
|
#endif
|
|
|
|
#ifndef SNORT_RELOAD
|
|
typedef void (*PreprocRegisterFunc)(char *, PreprocessorInitFunc);
|
|
#else
|
|
typedef void (*PreprocRegisterFunc)(char *, PreprocessorInitFunc,
|
|
PreprocessorReloadFunc,
|
|
PreprocessorReloadSwapFunc,
|
|
PreprocessorReloadSwapFreeFunc);
|
|
|
|
typedef void (*AddPreprocReloadVerifyFunc)(PreprocessorReloadVerifyFunc);
|
|
#endif
|
|
typedef int (*ThresholdCheckFunc)(unsigned int, unsigned int, snort_ip_p, snort_ip_p, long);
|
|
typedef int (*InlineDropFunc)(void *);
|
|
typedef void (*DisableDetectFunc)(void *);
|
|
typedef int (*SetPreprocBitFunc)(void *, u_int32_t);
|
|
typedef int (*DetectFunc)(void *);
|
|
typedef void *(*GetRuleInfoByNameFunc)(char *);
|
|
typedef void *(*GetRuleInfoByIdFunc)(int);
|
|
typedef int (*printfappendfunc)(char *, int, const char *, ...);
|
|
typedef char ** (*TokenSplitFunc)(const char *, const char *, const int, int *, const char);
|
|
typedef void (*TokenFreeFunc)(char ***, int);
|
|
typedef void (*AddPreprocProfileFunc)(char *, void *, int, void *);
|
|
typedef int (*ProfilingFunc)(void);
|
|
typedef int (*PreprocessFunc)(void *);
|
|
typedef void (*PreprocStatsRegisterFunc)(char *, void (*func)(int));
|
|
typedef void (*AddPreprocReset)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
|
|
typedef void (*AddPreprocResetStats)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
|
|
typedef void (*AddPreprocReassemblyPktFunc)(void * (*func)(void), u_int32_t);
|
|
typedef int (*SetPreprocReassemblyPktBitFunc)(void *, u_int32_t);
|
|
typedef void (*DisablePreprocessorsFunc)(void *);
|
|
#ifdef TARGET_BASED
|
|
typedef int16_t (*FindProtocolReferenceFunc)(char *);
|
|
typedef int16_t (*AddProtocolReferenceFunc)(char *);
|
|
typedef int (*IsAdaptiveConfiguredFunc)(tSfPolicyId, int);
|
|
#endif
|
|
#ifdef SUP_IP6
|
|
typedef void (*IP6BuildFunc)(void *, const void *, int);
|
|
#define SET_CALLBACK_IP 0
|
|
#define SET_CALLBACK_ICMP_ORIG 1
|
|
typedef void (*IP6SetCallbacksFunc)(void *, int, char);
|
|
#endif
|
|
typedef void (*AddKeywordOverrideFunc)(char *, char *, PreprocOptionInit,
|
|
PreprocOptionEval, PreprocOptionCleanup, PreprocOptionHash,
|
|
PreprocOptionKeyCompare, PreprocOptionOtnHandler,
|
|
PreprocOptionFastPatternFunc);
|
|
|
|
typedef int (*IsPreprocEnabledFunc)(u_int32_t);
|
|
|
|
typedef char * (*PortArrayFunc)(char *, PortObject *, int *);
|
|
|
|
typedef int (*AlertQueueLog)(void *);
|
|
typedef void (*AlertQueueControl)(void); // reset, push, and pop
|
|
typedef tSfPolicyId (*GetPolicyFunc)(void);
|
|
typedef void (*SetPolicyFunc)(tSfPolicyId);
|
|
typedef int (*GetInlineMode)(void);
|
|
typedef void (*SetFileDataPtrFunc)(const u_char *);
|
|
typedef long (*DynamicStrtol)(const char *, char **, int);
|
|
typedef unsigned long(*DynamicStrtoul)(const char *, char **, int);
|
|
|
|
typedef int (*EvalRTNFunc)(void *rtn, void *p, int check_ports);
|
|
|
|
/* Info Data passed to dynamic preprocessor plugin must include:
|
|
* version
|
|
* Pointer to AltDecodeBuffer
|
|
* Pointer to HTTP URI Buffers
|
|
* Pointer to functions to log Messages, Errors, Fatal Errors
|
|
* Pointer to function to add preprocessor to list of configure Preprocs
|
|
* Pointer to function to regsiter preprocessor configuration keyword
|
|
* Pointer to function to create preprocessor alert
|
|
*/
|
|
typedef struct _DynamicPreprocessorData
|
|
{
|
|
int version;
|
|
int size;
|
|
|
|
u_int8_t *altBuffer;
|
|
unsigned int altBufferLen;
|
|
UriInfo *uriBuffers[MAX_URIINFOS];
|
|
LogMsgFunc logMsg;
|
|
LogMsgFunc errMsg;
|
|
LogMsgFunc fatalMsg;
|
|
DebugMsgFunc debugMsg;
|
|
|
|
PreprocRegisterFunc registerPreproc;
|
|
AddPreprocFunc addPreproc;
|
|
AddPreprocRestart addPreprocRestart;
|
|
AddPreprocExit addPreprocExit;
|
|
AddPreprocConfCheck addPreprocConfCheck;
|
|
RegisterPreprocRuleOpt preprocOptRegister;
|
|
AddPreprocProfileFunc addPreprocProfileFunc;
|
|
ProfilingFunc profilingPreprocsFunc;
|
|
void *totalPerfStats;
|
|
|
|
AlertQueueAdd alertAdd;
|
|
GenSnortEvent genSnortEvent;
|
|
ThresholdCheckFunc thresholdCheck;
|
|
|
|
GetInlineMode inlineMode;
|
|
InlineDropFunc inlineDrop;
|
|
|
|
DetectFunc detect;
|
|
DisableDetectFunc disableDetect;
|
|
DisableDetectFunc disableAllDetect;
|
|
|
|
SetPreprocBitFunc setPreprocBit;
|
|
|
|
StreamAPI *streamAPI;
|
|
SearchAPI *searchAPI;
|
|
|
|
char **config_file;
|
|
int *config_line;
|
|
printfappendfunc printfappend;
|
|
TokenSplitFunc tokenSplit;
|
|
TokenFreeFunc tokenFree;
|
|
|
|
GetRuleInfoByNameFunc getRuleInfoByName;
|
|
GetRuleInfoByIdFunc getRuleInfoById;
|
|
#ifdef HAVE_WCHAR_H
|
|
DebugWideMsgFunc debugWideMsg;
|
|
#endif
|
|
|
|
PreprocessFunc preprocess;
|
|
|
|
char **debugMsgFile;
|
|
int *debugMsgLine;
|
|
|
|
PreprocStatsRegisterFunc registerPreprocStats;
|
|
AddPreprocReset addPreprocReset;
|
|
AddPreprocResetStats addPreprocResetStats;
|
|
AddPreprocReassemblyPktFunc addPreprocReassemblyPkt;
|
|
SetPreprocReassemblyPktBitFunc setPreprocReassemblyPktBit;
|
|
|
|
DisablePreprocessorsFunc disablePreprocessors;
|
|
|
|
#ifdef SUP_IP6
|
|
IP6BuildFunc ip6Build;
|
|
IP6SetCallbacksFunc ip6SetCallbacks;
|
|
#endif
|
|
|
|
AlertQueueLog logAlerts;
|
|
AlertQueueControl resetAlerts;
|
|
AlertQueueControl pushAlerts;
|
|
AlertQueueControl popAlerts;
|
|
|
|
#ifdef TARGET_BASED
|
|
FindProtocolReferenceFunc findProtocolReference;
|
|
AddProtocolReferenceFunc addProtocolReference;
|
|
IsAdaptiveConfiguredFunc isAdaptiveConfigured;
|
|
#endif
|
|
|
|
AddKeywordOverrideFunc preprocOptOverrideKeyword;
|
|
IsPreprocEnabledFunc isPreprocEnabled;
|
|
|
|
#ifdef SNORT_RELOAD
|
|
AddPreprocReloadVerifyFunc addPreprocReloadVerify;
|
|
#endif
|
|
|
|
PortArrayFunc portObjectCharPortArray;
|
|
|
|
GetPolicyFunc getRuntimePolicy;
|
|
GetPolicyFunc getParserPolicy;
|
|
GetPolicyFunc getDefaultPolicy;
|
|
SetPolicyFunc setParserPolicy;
|
|
SetFileDataPtrFunc setFileDataPtr;
|
|
DynamicStrtol SnortStrtol;
|
|
DynamicStrtoul SnortStrtoul;
|
|
EvalRTNFunc fpEvalRTN;
|
|
|
|
ObfuscationApi *obApi;
|
|
|
|
} DynamicPreprocessorData;
|
|
|
|
/* Function prototypes for Dynamic Preprocessor Plugins */
|
|
void CloseDynamicPreprocessorLibs(void);
|
|
int LoadDynamicPreprocessor(char *library_name, int indent);
|
|
void LoadAllDynamicPreprocessors(char *path);
|
|
typedef int (*InitPreprocessorLibFunc)(DynamicPreprocessorData *);
|
|
|
|
int InitDynamicPreprocessors(void);
|
|
void RemoveDuplicatePreprocessorPlugins(void);
|
|
|
|
/* This was necessary because of static code analysis not recognizing that
|
|
* fatalMsg did not return - use instead of fatalMsg
|
|
*/
|
|
NORETURN void DynamicPreprocessorFatalMessage(const char *format, ...);
|
|
|
|
#endif /* _SF_DYNAMIC_PREPROCESSOR_H_ */
|