skarg
333 lines
8.2 KiB
C
333 lines
8.2 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*********************************************************************/
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "address.h"
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#include "bacdef.h"
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#include "datalink.h"
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#include "bacdcode.h"
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#include "npdu.h"
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#include "apdu.h"
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#include "tsm.h"
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#include "device.h"
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#include "arf.h"
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#include "awf.h"
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typedef struct
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{
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uint32_t instance;
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char *filename;
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} BACNET_FILE_LISTING;
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static BACNET_FILE_LISTING BACnet_File_Listing[] =
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{
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{0, "temp.txt"},
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{1, "script.txt"},
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{0, NULL} // last file indication
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};
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char *bacfile_name(uint32_t instance)
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{
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uint32_t index = 0;
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char *filename = NULL;
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// linear search for file instance match
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while (BACnet_File_Listing[index].filename)
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{
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if (BACnet_File_Listing[index].instance == instance)
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{
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filename = BACnet_File_Listing[index].filename;
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break;
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}
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index++;
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}
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return filename;
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}
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bool bacfile_valid_instance(uint32_t object_instance)
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{
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return bacfile_name(object_instance) ? true : false;
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}
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uint32_t bacfile_count(void)
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{
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uint32_t index = 0;
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// linear search for file instance match
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while (BACnet_File_Listing[index].filename)
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{
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index++;
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}
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return index;
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}
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uint32_t bacfile_index_to_instance(unsigned find_index)
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{
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uint32_t instance = BACNET_MAX_INSTANCE + 1;
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uint32_t index = 0;
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// bounds checking...
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while (BACnet_File_Listing[index].filename)
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{
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if (index == find_index)
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{
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instance = BACnet_File_Listing[index].instance;
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break;
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}
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index++;
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}
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return instance;
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}
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static long fsize(FILE *pFile)
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{
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long size = 0;
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long origin = 0;
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if (pFile)
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{
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origin = ftell(pFile);
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fseek(pFile, 0L, SEEK_END);
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size = ftell(pFile);
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fseek(pFile, origin, SEEK_SET);
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}
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return (size);
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}
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static unsigned bacfile_file_size(uint32_t object_instance)
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{
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char *pFilename = NULL;
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FILE *pFile = NULL;
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unsigned file_size = 0;
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pFilename = bacfile_name(object_instance);
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if (pFilename)
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{
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pFile = fopen(pFilename,"rb");
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if (pFile)
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{
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file_size = fsize(pFile);
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fclose(pFile);
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}
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}
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return file_size;
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}
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int bacfile_encode_property_apdu(
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uint8_t *apdu,
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uint32_t object_instance,
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BACNET_PROPERTY_ID property,
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int32_t array_index,
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BACNET_ERROR_CLASS *error_class,
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BACNET_ERROR_CODE *error_code)
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{
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int apdu_len = 0; // return value
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char text_string[32] = {""};
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(void)array_index;
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switch (property)
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{
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case PROP_OBJECT_IDENTIFIER:
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apdu_len = encode_tagged_object_id(&apdu[0],
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OBJECT_FILE,
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object_instance);
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break;
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case PROP_OBJECT_NAME:
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sprintf(text_string,"FILE %d",object_instance);
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apdu_len = encode_tagged_character_string(&apdu[0], text_string);
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break;
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case PROP_OBJECT_TYPE:
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apdu_len = encode_tagged_enumerated(&apdu[0], OBJECT_FILE);
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break;
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case PROP_DESCRIPTION:
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apdu_len = encode_tagged_character_string(&apdu[0],
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bacfile_name(object_instance));
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break;
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case PROP_FILE_TYPE:
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apdu_len = encode_tagged_character_string(&apdu[0],"TEXT");
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break;
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case PROP_FILE_SIZE:
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apdu_len = encode_tagged_unsigned(&apdu[0],
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bacfile_file_size(object_instance));
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break;
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case PROP_MODIFICATION_DATE:
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// FIXME: get the actual value
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apdu_len = encode_tagged_date(&apdu[0],
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2005,
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12,
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25,
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7 /* sunday */);
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// FIXME: get the actual value
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apdu_len += encode_tagged_time(&apdu[apdu_len],
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12,
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0,
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0,
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0);
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break;
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case PROP_ARCHIVE:
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// FIXME: get the actual value: note it may be inverse...
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apdu_len = encode_tagged_boolean(&apdu[0],true);
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break;
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case PROP_READ_ONLY:
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// FIXME: get the actual value
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apdu_len = encode_tagged_boolean(&apdu[0],true);
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break;
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case PROP_FILE_ACCESS_METHOD:
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apdu_len = encode_tagged_enumerated(&apdu[0],FILE_STREAM_ACCESS);
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break;
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default:
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*error_class = ERROR_CLASS_PROPERTY;
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*error_code = ERROR_CODE_UNKNOWN_PROPERTY;
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break;
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}
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return apdu_len;
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}
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uint32_t bacfile_instance(char *filename)
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{
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uint32_t index = 0;
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uint32_t instance = BACNET_MAX_INSTANCE + 1;
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// linear search for filename match
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while (BACnet_File_Listing[index].filename)
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{
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if (strcmp(BACnet_File_Listing[index].filename,filename) == 0)
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{
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instance = BACnet_File_Listing[index].instance;
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break;
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}
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index++;
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}
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return instance;
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}
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// this is one way to match up the invoke ID with
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// the file ID from the AtomicReadFile request.
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// Another way would be to store the
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// invokeID and file instance in a list or table
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// when the request was sent
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uint32_t bacfile_instance_from_tsm(
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uint8_t invokeID)
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{
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BACNET_NPDU_DATA npdu_data = {0}; // dummy for getting npdu length
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BACNET_CONFIRMED_SERVICE_DATA service_data = {0};
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uint8_t service_choice = 0;
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uint8_t *service_request = NULL;
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uint16_t service_request_len = 0;
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BACNET_ADDRESS dest; // where the original packet was destined
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uint8_t pdu[MAX_PDU] = {0}; // original sent packet
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uint16_t pdu_len = 0; // original packet length
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uint16_t len = 0; // apdu header length
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BACNET_ATOMIC_READ_FILE_DATA data = {0};
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uint32_t object_instance = BACNET_MAX_INSTANCE + 1; // return value
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bool found = false;
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int apdu_offset = 0;
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found = tsm_get_transaction_pdu(
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invokeID,
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&dest,
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&pdu[0],
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&pdu_len);
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if (found)
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{
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apdu_offset = npdu_decode(
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&pdu[0], // data to decode
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NULL, // destination address - get the DNET/DLEN/DADR if in there
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NULL, // source address - get the SNET/SLEN/SADR if in there
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&npdu_data); // amount of data to decode
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if (!npdu_data.network_layer_message &&
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((pdu[apdu_offset] & 0xF0) == PDU_TYPE_CONFIRMED_SERVICE_REQUEST))
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{
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len = apdu_decode_confirmed_service_request(
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&pdu[apdu_offset], // APDU data
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pdu_len - apdu_offset,
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&service_data,
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&service_choice,
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&service_request,
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&service_request_len);
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if (service_choice == SERVICE_CONFIRMED_ATOMIC_READ_FILE)
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{
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len = arf_decode_service_request(
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service_request,
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service_request_len,
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&data);
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if (len > 0)
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{
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if (data.object_type == OBJECT_FILE)
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object_instance = data.object_instance;
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}
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}
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}
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}
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return object_instance;
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}
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bool bacfile_read_data(BACNET_ATOMIC_READ_FILE_DATA *data)
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{
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char *pFilename = NULL;
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bool found = false;
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FILE *pFile = NULL;
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pFilename = bacfile_name(data->object_instance);
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if (pFilename)
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{
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found = true;
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pFile = fopen(pFilename,"rb");
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if (pFile)
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{
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(void)fseek(pFile,
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data->type.stream.fileStartPosition,
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SEEK_SET);
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data->fileDataLength = fread(data->fileData, 1,
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data->type.stream.requestedOctetCount, pFile);
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fclose(pFile);
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}
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else
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{
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data->fileDataLength = 0;
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data->endOfFile = true;
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}
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}
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else
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{
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data->fileDataLength = 0;
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data->endOfFile = true;
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}
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return found;
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}
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