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-/*
-* Copyright (C) 2009-2010 Mamadou Diop.
-*
-* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
-*
-* This file is part of Open Source Doubango Framework.
-*
-* DOUBANGO is free software: you can redistribute it and/or modify
-* it under the terms of the GNU General Public License as published by
-* the Free Software Foundation, either version 3 of the License, or
-* (at your option) any later version.
-*
-* DOUBANGO 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 DOUBANGO.
-*
-*/
-
-/**@file tcomp_compressor.h
- * @brief SigComp Deflate compressor(Ghost).
- *
- * @author Mamadou Diop <diopmamadou(at)yahoo.fr>
- *
- * @date Created: Sat Nov 8 16:54:58 2009 mdiop
- */
-#include "tcomp_deflatedata.h"
-
-#include "tsk_binaryutils.h"
-#include "tsk_debug.h"
-
-#include <string.h>
-
-/*
- |<----------------------------DMS--------------------------------->|
- |<-----SigComp message---->|<------------UDVM memory size--------->|
- +-+----------+-------------+-----+----------+----------------------+
- | | bytecode | comp msg | | bytecode | circular buffer |
- +-+----------+-------------+-----+----------+----------------------+
- ^ ^
- | |
- SigComp header Low bytes of UDVM
-
-I suppose we would like to compress this message "libsigcomp":
- GHOST STRUCTURE:
- 0x02bb --> Circular Buffer size (DEFLATE_UDVM_CIRCULAR_START_INDEX = 699)
- 0x2000 --> DMS (8192)
- 0x0005 --> See 'libsigcomp/asm/deflate.asm' (MULTILOAD param number five)
- 0x02c5 --> 709 (DEFLATE_UDVM_CIRCULAR_START_INDEX + strlen("libsigcomp"))
- ...... --> Remaining MULTILOAD words
- 0x0682 --> 1666 (HASH_LEN = SMS+8)
- 0x067a --> 1658 (SMS)
- 0x1902 --> [CPB+DMS+SMS]+[SigComp version]
- ------------------------------------------------------------
- 0x0003 --> DEFLATE_NO_DICT
- ...... --> Dictionnary words
- 0x0000 --> FIXME
- 0x0000 --> FIXME
- ...... --> Deflate byte code (DeflateCompressor::deflate_bytecode)
- ...... --> no compressed message
-*/
-
-
-#define GHOST_CB_START_INDEX (0)
-#define GHOST_DMS_INDEX (GHOST_CB_START_INDEX + 2)
-#define GHOST_0x0005_INDEX (GHOST_DMS_INDEX + 2)
-#define GHOST_CB_END_INDEX (GHOST_0x0005_INDEX + 2)
-#define GHOST_HASH_LEN_INDEX (GHOST_CB_END_INDEX + 2 + 236)
-#define GHOST_SMS_INDEX (GHOST_HASH_LEN_INDEX + 2)
-#define GHOST_CPB_DMS_SMS_INDEX (GHOST_SMS_INDEX + 2)
-#define GHOST_VERSION_INDEX (GHOST_CPB_DMS_SMS_INDEX + 1)
-
-
-#define GHOST_BYTECODE1_SIZE (GHOST_VERSION_INDEX + 1)
-
-
-static const char* DeflateData_deflate_bytecode1_ghost =
-{
- "\xff\xff" // Circular buffer Size (CBS)
- "\xff\xff" // State Memory Size (DMS)
- "\x00\x05" // See 'libsigcomp/asm/deflate.asm'
- "\xff\xff" // (CBS + strlen(input))
-
- "\x00\x00\x00\x03\x00\x00\x00\x04\x00\x00\x00\x05\x00\x00\x00\x06\x00\x00\x00\x07\x00\x00\x00\x08\x00\x00\x00\x09\x00\x00"
- "\x00\x0a\x00\x01\x00\x0b\x00\x01\x00\x0d\x00\x01\x00\x0f\x00\x01\x00\x11\x00\x02\x00\x13\x00\x02\x00\x17\x00\x02\x00\x1b"
- "\x00\x02\x00\x1f\x00\x03\x00\x23\x00\x03\x00\x2b\x00\x03\x00\x33\x00\x03\x00\x3b\x00\x04\x00\x43\x00\x04\x00\x53\x00\x04"
- "\x00\x63\x00\x04\x00\x73\x00\x05\x00\x83\x00\x05\x00\xa3\x00\x05\x00\xc3\x00\x05\x00\xe3\x00\x00\x01\x02\x00\x00\x00\x01"
- "\x00\x00\x00\x02\x00\x00\x00\x03\x00\x00\x00\x04\x00\x01\x00\x05\x00\x01\x00\x07\x00\x02\x00\x09\x00\x02\x00\x0d\x00\x03"
- "\x00\x11\x00\x03\x00\x19\x00\x04\x00\x21\x00\x04\x00\x31\x00\x05\x00\x41\x00\x05\x00\x61\x00\x06\x00\x81\x00\x06\x00\xc1"
- "\x00\x07\x01\x01\x00\x07\x01\x81\x00\x08\x02\x01\x00\x08\x03\x01\x00\x09\x04\x01\x00\x09\x06\x01\x00\x0a\x08\x01\x00\x0a"
- "\x0c\x01\x00\x0b\x10\x01\x00\x0b\x18\x01\x00\x0c\x20\x01\x00\x0c\x30\x01\x00\x0d\x40\x01\x00\x0d\x60\x01"
-
- "\xff\xff" // HASH_LEN
- "\xff\xff" // SMS
- "\xff" // [CPB+DMS+SMS]
- "\xff" // SigComp Version
-};
-
-
-#define GHOST_STATE_ADDRESS 64
-#define GHOST_STATE_INSTRUCTION 492
-#define GHOST_STATE_MIN_ACCESS_LEN 6
-#define GHOST_STATE_RETENTION_PRIORITY 0
-
-/**Creates a Ghost state.
-*/
-void tcomp_deflatedata_createGhost(tcomp_deflatedata_t *deflatedata, uint16_t state_length, tcomp_params_t *params)
-{
- uint8_t *ghostvalue_ptr = 0;
-#define GHOSTVALUE_AT(position) (ghostvalue_ptr + position)
-
- if(!deflatedata){
- TSK_DEBUG_ERROR("NULL defalte data.");
- return;
- }
-
- if(deflatedata->ghostState){
- TSK_DEBUG_ERROR("The defalte data already have a ghost state. This MUST never happen.");
- return;
- }
-
- tsk_safeobj_lock(deflatedata);
-
- deflatedata->ghostState = tcomp_state_create(state_length, GHOST_STATE_ADDRESS, GHOST_STATE_INSTRUCTION, GHOST_STATE_MIN_ACCESS_LEN, GHOST_STATE_RETENTION_PRIORITY);
- tcomp_buffer_allocBuff(deflatedata->ghostState->value, state_length);
- ghostvalue_ptr = tcomp_buffer_getBuffer(deflatedata->ghostState->value);
-
- memcpy(ghostvalue_ptr, DeflateData_deflate_bytecode1_ghost, GHOST_BYTECODE1_SIZE);
-
- TSK_BINARY_SET_2BYTES( GHOSTVALUE_AT(GHOST_CB_START_INDEX), DEFLATE_UDVM_CIRCULAR_START_INDEX );
- TSK_BINARY_SET_2BYTES( GHOSTVALUE_AT(GHOST_DMS_INDEX), state_length+GHOST_STATE_ADDRESS );
- TSK_BINARY_SET_2BYTES( GHOSTVALUE_AT(GHOST_CB_END_INDEX), (DEFLATE_UDVM_CIRCULAR_START_INDEX + 0/*input_size*/) );
- // ......
- TSK_BINARY_SET_2BYTES( GHOSTVALUE_AT(GHOST_HASH_LEN_INDEX), (state_length+8) );
- TSK_BINARY_SET_2BYTES( GHOSTVALUE_AT(GHOST_SMS_INDEX), state_length );
- TSK_BINARY_SET_2BYTES( GHOSTVALUE_AT(GHOST_CPB_DMS_SMS_INDEX), tcomp_params_getParameters(params) ); // [cpb+dms+sms]+[version]
-
- // ------------------------------------------------------------
-
-#define GHOST_DICT_CODE_INDEX (GHOST_BYTECODE1_SIZE)
-#define GHOST_DICT_WORDS_INDEX (GHOST_DICT_CODE_INDEX + 2)
-#if USE_DICTS_FOR_COMPRESSION
-# define GHOST_FIXME2_INDEX (GHOST_DICT_WORDS_INDEX + 4/*Sip dict id len*/)
-#else
-# define GHOST_FIXME2_INDEX (GHOST_DICT_WORDS_INDEX + 0)
-#endif
-#define GHOST_DEFLATE_BYTECODE_INDEX (GHOST_FIXME2_INDEX + 4)
-#define GHOST_INPUT_INDEX (GHOST_DEFLATE_BYTECODE_INDEX + DEFLATE_BYTECODE_LEN)
-
-#if USE_DICTS_FOR_COMPRESSION
- BINARY_SET_2BYTES( ghostState->getStateValue()->getBuffer(GHOST_DICT_CODE_INDEX), DEFLATE_FIXME_DICT );
- if( DEFLATE_FIXME_DICT == DEFLATE_NO_DICT ){
- // Nothing to append
- }else{
- if(DEFLATE_FIXME_DICT == DEFLATE_SIP_DICT_ONLY){
- ::memmove( ghostState->getStateValue()->getBuffer(GHOST_DICT_WORDS_INDEX), RFC3485_DICTIONARY_SIP_IDENTIFIER, 4 );
- }else{
- assert(1==0);
- }
- }
-#endif
- memcpy( GHOSTVALUE_AT(GHOST_DEFLATE_BYTECODE_INDEX), (const char*)DEFLATEDATA_DEFLATE_BYTECODE, DEFLATE_BYTECODE_LEN );
-
- tsk_safeobj_unlock(deflatedata);
-
-#undef GHOSTVALUE_AT
-}
-
-/**Acknowledge a Ghost state.
-*/
-void tcomp_deflatedata_ackGhost(tcomp_compressordata_t *data, const tcomp_buffer_handle_t *stateid)
-{
- tcomp_deflatedata_t *deflatedata = data;
- if(!deflatedata){
- TSK_DEBUG_ERROR("NULL defalte data.");
- return;
- }
-
- tsk_safeobj_lock(deflatedata);
-
-#if USE_ONLY_ACKED_STATES
- if(deflatedata->ghostState){
- /* Update ghost */
- if(tcomp_buffer_startsWith(deflatedata->ghostState->identifier, stateid)){
- /* END() + COPY() */
- tcomp_deflateStream_end(&(deflatedata->stream_acked));
- tcomp_deflateStream_copy(&(deflatedata->stream_acked), &(deflatedata->stream_1));
- deflatedata->stream_acked.stateful = 1;
- deflatedata->stream_acked.dataWaitingAck = 0;
- }
- }
-#endif
-
- tsk_safeobj_unlock(deflatedata);
-}
-
-/**Updates a Ghost state.
-*/
-void tcomp_deflatedata_updateGhost(tcomp_deflatedata_t *deflatedata, const uint8_t *input_ptr, tsk_size_t input_size)
-{
- uint32_t i;
- uint8_t *ghostvalue_ptr = 0;
-
-#define GHOSTVALUE_AT(position) (ghostvalue_ptr + position)
-
- if(!deflatedata){
- TSK_DEBUG_ERROR("NULL defalte data.");
- return;
- }
-
- if(!deflatedata->ghostState){
- TSK_DEBUG_ERROR("NULL ghost state.");
- return;
- }
-
- tsk_safeobj_lock(deflatedata);
-
- ghostvalue_ptr = tcomp_buffer_getBuffer(deflatedata->ghostState->value);
-
-#define ZBUFF_LEN (0x0001 << deflatedata->zWindowBits)
- for(i = 0; i < input_size; i++){
-#if 0
- *GHOSTVALUE_AT(GHOST_INPUT_INDEX + ghost_copy_offset) = 0x00;
-#else
- *GHOSTVALUE_AT(GHOST_INPUT_INDEX + deflatedata->ghost_copy_offset) = input_ptr[i];
-#endif
- deflatedata->ghost_copy_offset = (deflatedata->ghost_copy_offset + 1) % ZBUFF_LEN;
- }
-
- /* Update Circular Buffer Index */
- TSK_BINARY_SET_2BYTES( GHOSTVALUE_AT(GHOST_CB_END_INDEX), (DEFLATE_UDVM_CIRCULAR_START_INDEX + deflatedata->ghost_copy_offset) );
-
- /* Compute State Identifier (20 bytes) */
- tcomp_state_makeValid(deflatedata->ghostState);
-
- /*printf("GHOST\n");
- tcomp_buffer_nprint(deflatedata->ghostState->value);
- tcomp_buffer_nprint(deflatedata->ghostState->identifier);*/
-
- tsk_safeobj_unlock(deflatedata);
-
-#undef GHOSTVALUE_AT
-}
-
-
-uint32_t* tcomp_deflatedata_getGhostCopyOffset(tcomp_deflatedata_t *deflatedata)
-{
- if(!deflatedata){
- TSK_DEBUG_ERROR("NULL defalte data.");
- return 0;
- }
-
- return &(deflatedata->ghost_copy_offset);
-}
-
-void tcomp_deflatedata_freeGhostState(tcomp_compressordata_t *data)
-{
- tcomp_deflatedata_t *deflatedata = data;
- if(!deflatedata){
- TSK_DEBUG_ERROR("NULL defalte data.");
- return;
- }
-
- TSK_OBJECT_SAFE_FREE(deflatedata->ghostState);
-}
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