mirror of
https://github.com/BlackLight/Snort_AIPreproc.git
synced 2024-11-11 03:17:15 +01:00
271 lines
9 KiB
C
271 lines
9 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License Version 2 as
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* published by the Free Software Foundation. You may not use, modify or
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* distribute this program under any other version of the GNU General
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* Public License.
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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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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) 2005-2010 Sourcefire, Inc.
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*
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* Author: Steven Sturges
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*
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* Dynamic Library Loading for Snort
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*
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*/
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#ifndef _SF_DYNAMIC_PREPROCESSOR_H_
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#define _SF_DYNAMIC_PREPROCESSOR_H_
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <ctype.h>
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#ifdef HAVE_WCHAR_H
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#include <wchar.h>
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#endif
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#include "sf_dynamic_meta.h"
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#include "ipv6_port.h"
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#include "sf_types.h"
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/* specifies that a function does not return
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* used for quieting Visual Studio warnings
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*/
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#ifdef WIN32
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#if _MSC_VER >= 1400
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#define NORETURN __declspec(noreturn)
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#else
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#define NORETURN
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#endif
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#else
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#define NORETURN
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#endif
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#ifdef PERF_PROFILING
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#ifndef PROFILE_PREPROCS_NOREDEF /* Don't redefine this from the main area */
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#ifdef PROFILING_PREPROCS
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#undef PROFILING_PREPROCS
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#endif
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#define PROFILING_PREPROCS _dpd.profilingPreprocsFunc()
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#endif
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#endif
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#define PREPROCESSOR_DATA_VERSION 5
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#include "sf_dynamic_common.h"
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#include "sf_dynamic_engine.h"
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#include "stream_api.h"
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#include "str_search.h"
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#include "obfuscation.h"
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#define MINIMUM_DYNAMIC_PREPROC_ID 10000
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typedef void (*PreprocessorInitFunc)(char *);
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typedef void * (*AddPreprocFunc)(void (*func)(void *, void *), u_int16_t, u_int32_t, u_int32_t);
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typedef void (*AddPreprocExit)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
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typedef void (*AddPreprocRestart)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
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typedef void (*AddPreprocConfCheck)(void (*func) (void));
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typedef int (*AlertQueueAdd)(unsigned int, unsigned int, unsigned int,
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unsigned int, unsigned int, char *, void *);
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typedef uint32_t (*GenSnortEvent)(SFSnortPacket *p, uint32_t gid, uint32_t sid, uint32_t rev,
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uint32_t classification, uint32_t priority, char *msg);
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#ifdef SNORT_RELOAD
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typedef void (*PreprocessorReloadFunc)(char *);
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typedef int (*PreprocessorReloadVerifyFunc)(void);
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typedef void * (*PreprocessorReloadSwapFunc)(void);
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typedef void (*PreprocessorReloadSwapFreeFunc)(void *);
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#endif
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#ifndef SNORT_RELOAD
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typedef void (*PreprocRegisterFunc)(char *, PreprocessorInitFunc);
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#else
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typedef void (*PreprocRegisterFunc)(char *, PreprocessorInitFunc,
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PreprocessorReloadFunc,
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PreprocessorReloadSwapFunc,
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PreprocessorReloadSwapFreeFunc);
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typedef void (*AddPreprocReloadVerifyFunc)(PreprocessorReloadVerifyFunc);
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#endif
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typedef int (*ThresholdCheckFunc)(unsigned int, unsigned int, snort_ip_p, snort_ip_p, long);
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typedef int (*InlineDropFunc)(void *);
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typedef void (*DisableDetectFunc)(void *);
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typedef int (*SetPreprocBitFunc)(void *, u_int32_t);
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typedef int (*DetectFunc)(void *);
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typedef void *(*GetRuleInfoByNameFunc)(char *);
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typedef void *(*GetRuleInfoByIdFunc)(int);
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typedef int (*printfappendfunc)(char *, int, const char *, ...);
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typedef char ** (*TokenSplitFunc)(const char *, const char *, const int, int *, const char);
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typedef void (*TokenFreeFunc)(char ***, int);
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typedef void (*AddPreprocProfileFunc)(char *, void *, int, void *);
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typedef int (*ProfilingFunc)(void);
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typedef int (*PreprocessFunc)(void *);
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typedef void (*PreprocStatsRegisterFunc)(char *, void (*func)(int));
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typedef void (*AddPreprocReset)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
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typedef void (*AddPreprocResetStats)(void (*func) (int, void *), void *arg, u_int16_t, u_int32_t);
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typedef void (*AddPreprocReassemblyPktFunc)(void * (*func)(void), u_int32_t);
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typedef int (*SetPreprocReassemblyPktBitFunc)(void *, u_int32_t);
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typedef void (*DisablePreprocessorsFunc)(void *);
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#ifdef TARGET_BASED
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typedef int16_t (*FindProtocolReferenceFunc)(char *);
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typedef int16_t (*AddProtocolReferenceFunc)(char *);
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typedef int (*IsAdaptiveConfiguredFunc)(tSfPolicyId, int);
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#endif
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#ifdef SUP_IP6
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typedef void (*IP6BuildFunc)(void *, const void *, int);
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#define SET_CALLBACK_IP 0
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#define SET_CALLBACK_ICMP_ORIG 1
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typedef void (*IP6SetCallbacksFunc)(void *, int, char);
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#endif
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typedef void (*AddKeywordOverrideFunc)(char *, char *, PreprocOptionInit,
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PreprocOptionEval, PreprocOptionCleanup, PreprocOptionHash,
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PreprocOptionKeyCompare, PreprocOptionOtnHandler,
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PreprocOptionFastPatternFunc);
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typedef int (*IsPreprocEnabledFunc)(u_int32_t);
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typedef char * (*PortArrayFunc)(char *, void *, int *);
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typedef int (*AlertQueueLog)(void *);
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typedef void (*AlertQueueControl)(void); /* reset, push, and pop */
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typedef tSfPolicyId (*GetPolicyFunc)(void);
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typedef void (*SetPolicyFunc)(tSfPolicyId);
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typedef int (*GetInlineMode)(void);
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typedef void (*SetFileDataPtrFunc)(const u_char *);
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typedef long (*DynamicStrtol)(const char *, char **, int);
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typedef unsigned long(*DynamicStrtoul)(const char *, char **, int);
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typedef int (*EvalRTNFunc)(void *rtn, void *p, int check_ports);
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/* Info Data passed to dynamic preprocessor plugin must include:
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* version
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* Pointer to AltDecodeBuffer
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* Pointer to HTTP URI Buffers
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* Pointer to functions to log Messages, Errors, Fatal Errors
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* Pointer to function to add preprocessor to list of configure Preprocs
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* Pointer to function to regsiter preprocessor configuration keyword
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* Pointer to function to create preprocessor alert
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*/
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typedef struct _DynamicPreprocessorData
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{
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int version;
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int size;
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u_int8_t *altBuffer;
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unsigned int altBufferLen;
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UriInfo *uriBuffers[MAX_URIINFOS];
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LogMsgFunc logMsg;
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LogMsgFunc errMsg;
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LogMsgFunc fatalMsg;
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DebugMsgFunc debugMsg;
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PreprocRegisterFunc registerPreproc;
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AddPreprocFunc addPreproc;
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AddPreprocRestart addPreprocRestart;
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AddPreprocExit addPreprocExit;
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AddPreprocConfCheck addPreprocConfCheck;
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RegisterPreprocRuleOpt preprocOptRegister;
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AddPreprocProfileFunc addPreprocProfileFunc;
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ProfilingFunc profilingPreprocsFunc;
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void *totalPerfStats;
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AlertQueueAdd alertAdd;
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GenSnortEvent genSnortEvent;
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ThresholdCheckFunc thresholdCheck;
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GetInlineMode inlineMode;
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InlineDropFunc inlineDrop;
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DetectFunc detect;
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DisableDetectFunc disableDetect;
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DisableDetectFunc disableAllDetect;
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SetPreprocBitFunc setPreprocBit;
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StreamAPI *streamAPI;
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SearchAPI *searchAPI;
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char **config_file;
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int *config_line;
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printfappendfunc printfappend;
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TokenSplitFunc tokenSplit;
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TokenFreeFunc tokenFree;
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GetRuleInfoByNameFunc getRuleInfoByName;
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GetRuleInfoByIdFunc getRuleInfoById;
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#ifdef HAVE_WCHAR_H
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DebugWideMsgFunc debugWideMsg;
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#endif
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PreprocessFunc preprocess;
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char **debugMsgFile;
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int *debugMsgLine;
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PreprocStatsRegisterFunc registerPreprocStats;
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AddPreprocReset addPreprocReset;
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AddPreprocResetStats addPreprocResetStats;
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AddPreprocReassemblyPktFunc addPreprocReassemblyPkt;
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SetPreprocReassemblyPktBitFunc setPreprocReassemblyPktBit;
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DisablePreprocessorsFunc disablePreprocessors;
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#ifdef SUP_IP6
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IP6BuildFunc ip6Build;
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IP6SetCallbacksFunc ip6SetCallbacks;
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#endif
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AlertQueueLog logAlerts;
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AlertQueueControl resetAlerts;
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AlertQueueControl pushAlerts;
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AlertQueueControl popAlerts;
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#ifdef TARGET_BASED
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FindProtocolReferenceFunc findProtocolReference;
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AddProtocolReferenceFunc addProtocolReference;
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IsAdaptiveConfiguredFunc isAdaptiveConfigured;
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#endif
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AddKeywordOverrideFunc preprocOptOverrideKeyword;
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IsPreprocEnabledFunc isPreprocEnabled;
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#ifdef SNORT_RELOAD
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AddPreprocReloadVerifyFunc addPreprocReloadVerify;
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#endif
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PortArrayFunc portObjectCharPortArray;
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GetPolicyFunc getRuntimePolicy;
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GetPolicyFunc getParserPolicy;
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GetPolicyFunc getDefaultPolicy;
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SetPolicyFunc setParserPolicy;
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SetFileDataPtrFunc setFileDataPtr;
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DynamicStrtol SnortStrtol;
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DynamicStrtoul SnortStrtoul;
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EvalRTNFunc fpEvalRTN;
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ObfuscationApi *obApi;
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} DynamicPreprocessorData;
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/* Function prototypes for Dynamic Preprocessor Plugins */
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void CloseDynamicPreprocessorLibs(void);
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int LoadDynamicPreprocessor(char *library_name, int indent);
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void LoadAllDynamicPreprocessors(char *path);
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typedef int (*InitPreprocessorLibFunc)(DynamicPreprocessorData *);
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int InitDynamicPreprocessors(void);
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void RemoveDuplicatePreprocessorPlugins(void);
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/* This was necessary because of static code analysis not recognizing that
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* fatalMsg did not return - use instead of fatalMsg
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*/
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NORETURN void DynamicPreprocessorFatalMessage(const char *format, ...);
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#endif /* _SF_DYNAMIC_PREPROCESSOR_H_ */
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