172 lines
6.4 KiB
C
172 lines
6.4 KiB
C
/*
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* Copyright (c) 2001 - 2003
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* NetGroup, Politecnico di Torino (Italy)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Politecnico di Torino nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef __tme_include_
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#define __tme_include_
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#ifdef WIN_NT_DRIVER
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#include "ndis.h"
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#else
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#include <windows.h>
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#endif /*WIN_NT_DRIVER*/
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#include "memory_t.h"
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#include "time_calls.h"
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/* error codes */
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#define TME_ERROR 0
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#define TME_SUCCESS 1
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#define TME_TRUE 2
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#define TME_FALSE 3
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/* some constants */
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#define DEFAULT_MEM_EX_SIZE 65536
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#define MAX_TME_DATA_BLOCKS 4
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#define TME_NONE_ACTIVE 0xffffffff
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#define DELTA_READ 2 /* secs */
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#define TME_LUT_ENTRIES 0x00000000
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#define TME_MAX_FILL_STATE 0x00000001 /*potrebbe servire per un thread a passive level!?!?! */
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#define TME_REHASHING_VALUE 0x00000002
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#define TME_KEY_LEN 0x00000003
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#define TME_SHARED_MEMORY_BLOCKS 0x00000004
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#define TME_FILLED_ENTRIES 0x00000005
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#define TME_BLOCK_SIZE 0x00000006
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#define TME_EXTRA_SEGMENT_SIZE 0x00000007
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#define TME_LOOKUP_CODE 0x00000008
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#define TME_OUT_LUT_EXEC 0x00000009
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#define TME_FILLED_BLOCKS 0x0000000a
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#define TME_DEFAULT_EXEC 0x0000000b
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#define TME_LUT_BASE_ADDRESS 0x0000000c
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#define TME_SHARED_MEMORY_BASE_ADDRESS 0x0000000d
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#define TME_EXTRA_SEGMENT_BASE_ADDRESS 0x0000000e
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#define TME_LAST_FOUND 0x0000000f /* contains the offset of the last found entry */
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#define TME_LAST_FOUND_BLOCK 0x00000010
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/* TME default values */
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#define TME_LUT_ENTRIES_DEFAULT 32007
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#define TME_REHASHING_VALUE_DEFAULT 1
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#define TME_SHARED_MEMORY_BLOCKS_DEFAULT 16000
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#define TME_BLOCK_SIZE_DEFAULT 64
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#define TME_EXTRA_SEGMENT_SIZE_DEFAULT 0
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#define TME_LOOKUP_CODE_DEFAULT 0
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#define TME_OUT_LUT_EXEC_DEFAULT 0
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#define TME_DEFAULT_EXEC_DEFAULT 0
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#define TME_MAX_FILL_STATE_DEFAULT 15000
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#define IS_VALIDATED(src,index) (src&(1<<index))
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#define VALIDATE(src,index) src|=(1<<index);
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#define FORCE_NO_DELETION(timestamp) (struct timeval*)(timestamp)->tv_sec=0x7fffffff;
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struct __TME_DATA;
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/* TME callback prototypes */
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typedef uint32 (* lut_fcn )( uint8 * key, struct __TME_DATA * data, MEM_TYPE * mem_ex, struct time_conv * time_ref );
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typedef uint32 (* exec_fcn )( uint8 * block, uint32 pkt_size, struct __TME_DATA * data, MEM_TYPE * mem_ex, uint8 * mem_data );
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/* DO NOT MODIFY THIS STRUCTURE!!!! GV */
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typedef struct __RECORD
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{
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uint32 block;
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uint32 exec_fcn;
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}
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RECORD, * PRECORD;
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/* TME data registers */
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struct __TME_DATA
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{
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uint32 lut_entries;
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uint32 max_fill_state;
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uint32 rehashing_value;
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uint32 key_len;
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uint32 shared_memory_blocks;
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uint32 filled_entries;
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uint32 block_size;
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uint32 extra_segment_size;
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uint32 filled_blocks;
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lut_fcn lookup_code;
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uint32 default_exec;
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uint32 out_lut_exec;
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uint8 * lut_base_address;
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uint8 * shared_memory_base_address;
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uint8 * extra_segment_base_address;
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struct timeval last_read;
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uint32 enable_deletion;
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uint8 * last_found;
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};
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typedef struct __TME_DATA TME_DATA,* PTME_DATA;
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/* TME core */
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typedef struct __TME_CORE
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{
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uint32 working;
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uint32 active;
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uint32 validated_blocks;
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TME_DATA block_data[MAX_TME_DATA_BLOCKS];
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uint32 active_read;
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} TME_CORE, * PTME_CORE;
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static __inline int32 IS_DELETABLE( void * timestamp, TME_DATA * data )
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{
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struct timeval * ts = ( struct timeval *)timestamp;
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if ( data->enable_deletion == FALSE )
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return FALSE;
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if ( data->filled_entries < data->max_fill_state )
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return FALSE;
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if (( ts->tv_sec + DELTA_READ )< data->last_read.tv_sec )
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return TRUE;
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return FALSE;
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}
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/* functions to manage TME */
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uint32 init_tme_block( TME_CORE * tme, uint32 block );
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uint32 validate_tme_block( MEM_TYPE * mem_ex, TME_CORE * tme, uint32 block, uint32 mem_ex_offset );
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uint32 lookup_frontend( MEM_TYPE * mem_ex, TME_CORE * tme, uint32 mem_ex_offset, struct time_conv * time_ref );
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uint32 execute_frontend( MEM_TYPE * mem_ex, TME_CORE * tme, uint32 pkt_size, uint32 offset );
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uint32 set_active_tme_block( TME_CORE * tme, uint32 block );
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uint32 init_extended_memory( uint32 size, MEM_TYPE * mem_ex );
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uint32 reset_tme( TME_CORE * tme );
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uint32 get_tme_block_register( TME_DATA * data, MEM_TYPE * mem_ex, uint32 rgstr, uint32 * rval );
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uint32 set_tme_block_register( TME_DATA * data, MEM_TYPE * mem_ex, uint32 rgstr, uint32 value, int32 init );
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uint32 set_active_read_tme_block( TME_CORE * tme, uint32 block );
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uint32 set_autodeletion( TME_DATA * data, uint32 value );
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/* function mappers */
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lut_fcn lut_fcn_mapper( uint32 index );
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exec_fcn exec_fcn_mapper( uint32 index );
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#endif
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