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282 lines
12 KiB
C
282 lines
12 KiB
C
/* Copyright (C) 2007-2013 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 Victor Julien <victor@inliniac.net>
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* \author Anoop Saldanha <anoopsaldanha@gmail.com>
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*/
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#ifndef __APP_LAYER_PARSER_H__
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#define __APP_LAYER_PARSER_H__
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#include "app-layer-events.h"
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#include "detect-engine-state.h"
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#include "util-file.h"
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#include "stream-tcp-private.h"
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/* Flags for AppLayerParserState. */
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#define APP_LAYER_PARSER_EOF BIT_U8(0)
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#define APP_LAYER_PARSER_NO_INSPECTION BIT_U8(1)
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#define APP_LAYER_PARSER_NO_REASSEMBLY BIT_U8(2)
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#define APP_LAYER_PARSER_NO_INSPECTION_PAYLOAD BIT_U8(3)
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#define APP_LAYER_PARSER_BYPASS_READY BIT_U8(4)
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/* Flags for AppLayerParserProtoCtx. */
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#define APP_LAYER_PARSER_OPT_ACCEPT_GAPS BIT_U32(0)
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#define APP_LAYER_PARSER_INT_STREAM_DEPTH_SET BIT_U32(0)
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/* applies to DetectFlags uint64_t field */
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/** is tx fully inspected? */
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#define APP_LAYER_TX_INSPECTED_FLAG BIT_U64(63)
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/** other 63 bits are for tracking which prefilter engine is already
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* completely inspected */
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#define APP_LAYER_TX_PREFILTER_MASK ~APP_LAYER_TX_INSPECTED_FLAG
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int AppLayerParserProtoIsRegistered(uint8_t ipproto, AppProto alproto);
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/***** transaction handling *****/
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int AppLayerParserSetup(void);
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void AppLayerParserPostStreamSetup(void);
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int AppLayerParserDeSetup(void);
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typedef struct AppLayerParserThreadCtx_ AppLayerParserThreadCtx;
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/**
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* \brief Gets a new app layer protocol's parser thread context.
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*
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* \retval Non-NULL pointer on success.
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* NULL pointer on failure.
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*/
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AppLayerParserThreadCtx *AppLayerParserThreadCtxAlloc(void);
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/**
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* \brief Destroys the app layer parser thread context obtained
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* using AppLayerParserThreadCtxAlloc().
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*
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* \param tctx Pointer to the thread context to be destroyed.
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*/
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void AppLayerParserThreadCtxFree(AppLayerParserThreadCtx *tctx);
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/**
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* \brief Given a protocol name, checks if the parser is enabled in
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* the conf file.
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*
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* \param alproto_name Name of the app layer protocol.
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*
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* \retval 1 If enabled.
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* \retval 0 If disabled.
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*/
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int AppLayerParserConfParserEnabled(const char *ipproto,
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const char *alproto_name);
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/** \brief Prototype for parsing functions */
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typedef int (*AppLayerParserFPtr)(Flow *f, void *protocol_state,
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AppLayerParserState *pstate,
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uint8_t *buf, uint32_t buf_len,
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void *local_storage, const uint8_t flags);
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typedef struct AppLayerGetTxIterTuple {
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void *tx_ptr;
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uint64_t tx_id;
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bool has_next;
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} AppLayerGetTxIterTuple;
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typedef struct AppLayerGetTxIterState {
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union {
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void *ptr;
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uint64_t u64;
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} un;
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} AppLayerGetTxIterState;
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/** \brief tx iterator prototype */
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typedef AppLayerGetTxIterTuple (*AppLayerGetTxIteratorFunc)
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(const uint8_t ipproto, const AppProto alproto,
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void *alstate, uint64_t min_tx_id, uint64_t max_tx_id,
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AppLayerGetTxIterState *state);
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/***** Parser related registration *****/
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/**
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* \brief Register app layer parser for the protocol.
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*
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* \retval 0 On success.
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* \retval -1 On failure.
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*/
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int AppLayerParserRegisterParser(uint8_t ipproto, AppProto alproto,
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uint8_t direction,
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AppLayerParserFPtr Parser);
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void AppLayerParserRegisterParserAcceptableDataDirection(uint8_t ipproto,
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AppProto alproto,
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uint8_t direction);
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void AppLayerParserRegisterOptionFlags(uint8_t ipproto, AppProto alproto,
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uint32_t flags);
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void AppLayerParserRegisterStateFuncs(uint8_t ipproto, AppProto alproto,
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void *(*StateAlloc)(void),
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void (*StateFree)(void *));
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void AppLayerParserRegisterLocalStorageFunc(uint8_t ipproto, AppProto proto,
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void *(*LocalStorageAlloc)(void),
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void (*LocalStorageFree)(void *));
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void AppLayerParserRegisterGetFilesFunc(uint8_t ipproto, AppProto alproto,
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FileContainer *(*StateGetFiles)(void *, uint8_t));
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void AppLayerParserRegisterGetEventsFunc(uint8_t ipproto, AppProto proto,
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AppLayerDecoderEvents *(*StateGetEvents)(void *, uint64_t));
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void AppLayerParserRegisterLoggerFuncs(uint8_t ipproto, AppProto alproto,
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LoggerId (*StateGetTxLogged)(void *, void *),
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void (*StateSetTxLogged)(void *, void *, LoggerId));
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void AppLayerParserRegisterLogger(uint8_t ipproto, AppProto alproto);
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void AppLayerParserRegisterLoggerBits(uint8_t ipproto, AppProto alproto, LoggerId bits);
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void AppLayerParserRegisterTruncateFunc(uint8_t ipproto, AppProto alproto,
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void (*Truncate)(void *, uint8_t));
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void AppLayerParserRegisterGetStateProgressFunc(uint8_t ipproto, AppProto alproto,
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int (*StateGetStateProgress)(void *alstate, uint8_t direction));
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void AppLayerParserRegisterTxFreeFunc(uint8_t ipproto, AppProto alproto,
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void (*StateTransactionFree)(void *, uint64_t));
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void AppLayerParserRegisterGetTxCnt(uint8_t ipproto, AppProto alproto,
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uint64_t (*StateGetTxCnt)(void *alstate));
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void AppLayerParserRegisterGetTx(uint8_t ipproto, AppProto alproto,
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void *(StateGetTx)(void *alstate, uint64_t tx_id));
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void AppLayerParserRegisterGetTxIterator(uint8_t ipproto, AppProto alproto,
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AppLayerGetTxIteratorFunc Func);
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void AppLayerParserRegisterGetStateProgressCompletionStatus(AppProto alproto,
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int (*StateGetStateProgressCompletionStatus)(uint8_t direction));
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void AppLayerParserRegisterGetEventInfo(uint8_t ipproto, AppProto alproto,
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int (*StateGetEventInfo)(const char *event_name, int *event_id,
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AppLayerEventType *event_type));
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void AppLayerParserRegisterDetectStateFuncs(uint8_t ipproto, AppProto alproto,
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DetectEngineState *(*GetTxDetectState)(void *tx),
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int (*SetTxDetectState)(void *tx, DetectEngineState *));
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void AppLayerParserRegisterGetStreamDepth(uint8_t ipproto,
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AppProto alproto,
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uint32_t (*GetStreamDepth)(void));
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void AppLayerParserRegisterMpmIDsFuncs(uint8_t ipproto, AppProto alproto,
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uint64_t (*GetTxMpmIDs)(void *tx),
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int (*SetTxMpmIDs)(void *tx, uint64_t));
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void AppLayerParserRegisterDetectFlagsFuncs(uint8_t ipproto, AppProto alproto,
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uint64_t(*GetTxDetectFlags)(void *tx, uint8_t dir),
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void (*SetTxDetectFlags)(void *tx, uint8_t dir, uint64_t));
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/***** Get and transaction functions *****/
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AppLayerGetTxIteratorFunc AppLayerGetTxIterator(const uint8_t ipproto,
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const AppProto alproto);
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void *AppLayerParserGetProtocolParserLocalStorage(uint8_t ipproto, AppProto alproto);
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void AppLayerParserDestroyProtocolParserLocalStorage(uint8_t ipproto, AppProto alproto,
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void *local_data);
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uint64_t AppLayerParserGetTransactionLogId(AppLayerParserState *pstate);
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void AppLayerParserSetTransactionLogId(AppLayerParserState *pstate, uint64_t tx_id);
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void AppLayerParserSetTxLogged(uint8_t ipproto, AppProto alproto, void *alstate,
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void *tx, LoggerId logged);
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LoggerId AppLayerParserGetTxLogged(const Flow *f, void *alstate, void *tx);
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uint64_t AppLayerParserGetTransactionInspectId(AppLayerParserState *pstate, uint8_t direction);
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void AppLayerParserSetTransactionInspectId(const Flow *f, AppLayerParserState *pstate,
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void *alstate, const uint8_t flags, bool tag_txs_as_inspected);
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AppLayerDecoderEvents *AppLayerParserGetDecoderEvents(AppLayerParserState *pstate);
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void AppLayerParserSetDecoderEvents(AppLayerParserState *pstate, AppLayerDecoderEvents *devents);
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AppLayerDecoderEvents *AppLayerParserGetEventsByTx(uint8_t ipproto, AppProto alproto, void *alstate,
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uint64_t tx_id);
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FileContainer *AppLayerParserGetFiles(uint8_t ipproto, AppProto alproto,
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void *alstate, uint8_t direction);
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int AppLayerParserGetStateProgress(uint8_t ipproto, AppProto alproto,
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void *alstate, uint8_t direction);
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uint64_t AppLayerParserGetTxCnt(const Flow *, void *alstate);
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void *AppLayerParserGetTx(uint8_t ipproto, AppProto alproto, void *alstate, uint64_t tx_id);
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int AppLayerParserGetStateProgressCompletionStatus(AppProto alproto, uint8_t direction);
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int AppLayerParserGetEventInfo(uint8_t ipproto, AppProto alproto, const char *event_name,
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int *event_id, AppLayerEventType *event_type);
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uint64_t AppLayerParserGetTransactionActive(const Flow *f, AppLayerParserState *pstate, uint8_t direction);
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uint8_t AppLayerParserGetFirstDataDir(uint8_t ipproto, AppProto alproto);
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int AppLayerParserSupportsFiles(uint8_t ipproto, AppProto alproto);
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int AppLayerParserSupportsTxDetectState(uint8_t ipproto, AppProto alproto);
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int AppLayerParserHasTxDetectState(uint8_t ipproto, AppProto alproto, void *alstate);
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DetectEngineState *AppLayerParserGetTxDetectState(uint8_t ipproto, AppProto alproto, void *tx);
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int AppLayerParserSetTxDetectState(const Flow *f, void *tx, DetectEngineState *s);
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uint64_t AppLayerParserGetTxDetectFlags(uint8_t ipproto, AppProto alproto, void *tx, uint8_t dir);
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void AppLayerParserSetTxDetectFlags(uint8_t ipproto, AppProto alproto, void *tx, uint8_t dir, uint64_t);
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/***** General *****/
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int AppLayerParserParse(ThreadVars *tv, AppLayerParserThreadCtx *tctx, Flow *f, AppProto alproto,
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uint8_t flags, uint8_t *input, uint32_t input_len);
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void AppLayerParserSetEOF(AppLayerParserState *pstate);
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bool AppLayerParserHasDecoderEvents(AppLayerParserState *pstate);
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int AppLayerParserIsTxAware(AppProto alproto);
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int AppLayerParserProtocolIsTxEventAware(uint8_t ipproto, AppProto alproto);
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int AppLayerParserProtocolHasLogger(uint8_t ipproto, AppProto alproto);
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LoggerId AppLayerParserProtocolGetLoggerBits(uint8_t ipproto, AppProto alproto);
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void AppLayerParserTriggerRawStreamReassembly(Flow *f, int direction);
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void AppLayerParserSetStreamDepth(uint8_t ipproto, AppProto alproto, uint32_t stream_depth);
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uint32_t AppLayerParserGetStreamDepth(const Flow *f);
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/***** Cleanup *****/
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void AppLayerParserStateCleanup(const Flow *f, void *alstate, AppLayerParserState *pstate);
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void AppLayerParserRegisterProtocolParsers(void);
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void AppLayerParserStateSetFlag(AppLayerParserState *pstate, uint8_t flag);
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int AppLayerParserStateIssetFlag(AppLayerParserState *pstate, uint8_t flag);
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void AppLayerParserStreamTruncated(uint8_t ipproto, AppProto alproto, void *alstate,
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uint8_t direction);
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AppLayerParserState *AppLayerParserStateAlloc(void);
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void AppLayerParserStateFree(AppLayerParserState *pstate);
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void AppLayerParserTransactionsCleanup(Flow *f);
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#ifdef DEBUG
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void AppLayerParserStatePrintDetails(AppLayerParserState *pstate);
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#endif
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#ifdef AFLFUZZ_APPLAYER
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int AppLayerParserRequestFromFile(uint8_t ipproto, AppProto alproto, char *filename);
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int AppLayerParserRequestFromFileSerie(uint8_t ipproto, AppProto alproto, char *prefix);
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int AppLayerParserFromFile(uint8_t ipproto, AppProto alproto, char *filename);
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int AppLayerParserFromFileSerie(uint8_t ipproto, AppProto alproto, char *prefix);
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#endif
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/***** Unittests *****/
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#ifdef UNITTESTS
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void AppLayerParserRegisterProtocolUnittests(uint8_t ipproto, AppProto alproto,
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void (*RegisterUnittests)(void));
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void AppLayerParserRegisterUnittests(void);
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void AppLayerParserBackupParserTable(void);
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void AppLayerParserRestoreParserTable(void);
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void UTHAppLayerParserStateGetIds(void *ptr, uint64_t *i1, uint64_t *i2, uint64_t *log, uint64_t *min);
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#endif
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#endif /* __APP_LAYER_PARSER_H__ */
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