petermcs
216 lines
7.3 KiB
C
216 lines
7.3 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 <string.h>
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#include <errno.h>
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#include "config.h"
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#include "txbuf.h"
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#include "bacdef.h"
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#include "bacdcode.h"
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#include "bacerror.h"
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#include "apdu.h"
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#include "npdu.h"
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#include "abort.h"
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#include "wp.h"
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static write_property_function Write_Property[MAX_BACNET_OBJECT_TYPE];
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void handler_write_property_object_set(
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BACNET_OBJECT_TYPE object_type,
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write_property_function pFunction)
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{
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if (object_type < MAX_BACNET_OBJECT_TYPE) {
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Write_Property[object_type] = pFunction;
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}
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}
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void handler_write_property(
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uint8_t * service_request,
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uint16_t service_len,
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BACNET_ADDRESS * src,
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BACNET_CONFIRMED_SERVICE_DATA * service_data)
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{
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BACNET_WRITE_PROPERTY_DATA wp_data;
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int len = 0;
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int pdu_len = 0;
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BACNET_NPDU_DATA npdu_data;
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BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
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BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
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int bytes_sent = 0;
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BACNET_ADDRESS my_address;
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write_property_function wp_function = NULL;
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/* encode the NPDU portion of the packet */
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datalink_get_my_address(&my_address);
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npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
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pdu_len =
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npdu_encode_pdu(&Handler_Transmit_Buffer[0], src, &my_address,
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&npdu_data);
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#if PRINT_ENABLED
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fprintf(stderr, "WP: Received Request!\n");
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#endif
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if (service_data->segmented_message) {
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len =
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abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, ABORT_REASON_SEGMENTATION_NOT_SUPPORTED,
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true);
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#if PRINT_ENABLED
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fprintf(stderr, "WP: Segmented message. Sending Abort!\n");
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#endif
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goto WP_ABORT;
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} /* decode the service request only */
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len = wp_decode_service_request(service_request, service_len, &wp_data);
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#if PRINT_ENABLED
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if (len > 0)
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fprintf(stderr,
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"WP: type=%lu instance=%lu property=%lu priority=%lu index=%ld\n",
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(unsigned long)wp_data.object_type, (unsigned long)wp_data.object_instance,
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(unsigned long)wp_data.object_property, (unsigned long)wp_data.priority, (long)wp_data.array_index);
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else
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fprintf(stderr, "WP: Unable to decode Request!\n");
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#endif
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/* bad decoding or something we didn't understand - send an abort */
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if (len <= 0) {
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len =
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abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, ABORT_REASON_OTHER, true);
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#if PRINT_ENABLED
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fprintf(stderr, "WP: Bad Encoding. Sending Abort!\n");
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#endif
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goto WP_ABORT;
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}
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if (wp_data.object_type < MAX_BACNET_OBJECT_TYPE) {
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wp_function = Write_Property[wp_data.object_type];
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}
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if (wp_function) {
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if (wp_function(&wp_data, &error_class, &error_code)) {
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len =
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encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY);
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#if PRINT_ENABLED
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fprintf(stderr, "WP: Sending Simple Ack!\n");
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#endif
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} else {
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len =
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bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
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error_class, error_code);
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#if PRINT_ENABLED
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fprintf(stderr, "WP: Sending Error!\n");
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#endif
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}
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} else {
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len =
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bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
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service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
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error_class, error_code);
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#if PRINT_ENABLED
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fprintf(stderr, "WP: Sending Unknown Object Error!\n");
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#endif
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}
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WP_ABORT:
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pdu_len += len;
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bytes_sent =
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datalink_send_pdu(src, &npdu_data, &Handler_Transmit_Buffer[0],
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pdu_len);
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#if PRINT_ENABLED
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if (bytes_sent <= 0)
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fprintf(stderr, "WP: Failed to send PDU (%s)!\n", strerror(errno));
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#endif
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return;
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}
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/*
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* Perform basic validation of Write Property argument based on
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* the assumption that it is a string. Check for correct data type,
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* correct encoding (fixed here as ANSI X34),correct length, and
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* finally if it is allowed to be empty.
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*/
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bool WPValidateString(
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BACNET_APPLICATION_DATA_VALUE *pValue,
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int iMaxLen,
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bool bEmptyAllowed,
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BACNET_ERROR_CLASS * pErrorClass,
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BACNET_ERROR_CODE * pErrorCode)
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{
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bool bResult;
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/* Save on a bit of code duplication by pre selecting the most
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* common outcomes from the tests (not necessarily the most likely
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* outcome of the tests).
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*/
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bResult = false;
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*pErrorClass = ERROR_CLASS_PROPERTY;
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if(pValue->tag == BACNET_APPLICATION_TAG_CHARACTER_STRING) {
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if(characterstring_encoding(&pValue->type.Character_String) == CHARACTER_ANSI_X34) {
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if((bEmptyAllowed == false) && (characterstring_length(&pValue->type.Character_String) == 0)) {
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*pErrorCode = ERROR_CODE_VALUE_OUT_OF_RANGE;
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} else if(characterstring_length(&pValue->type.Character_String) >= iMaxLen) {
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*pErrorClass = ERROR_CLASS_RESOURCES;
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*pErrorCode = ERROR_CODE_NO_SPACE_TO_WRITE_PROPERTY;
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} else
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bResult = true; /* It's all good! */
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} else
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*pErrorCode = ERROR_CODE_CHARACTER_SET_NOT_SUPPORTED;
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} else
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*pErrorCode = ERROR_CODE_INVALID_DATA_TYPE;
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return(bResult);
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}
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/*
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* Perform simple validation of type of Write Property argument based
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* the expected type vs the actual. Set up error response if the
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* validation fails. Cuts out reams of repeated code in the object code.
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*/
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bool WPValidateArgType(
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BACNET_APPLICATION_DATA_VALUE *pValue,
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uint8_t ucExpectedTag,
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BACNET_ERROR_CLASS * pErrorClass,
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BACNET_ERROR_CODE * pErrorCode)
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{
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bool bResult;
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/*
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* start out assuming success and only set up error
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* response if validation fails.
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*/
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bResult = true;
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if(pValue->tag != ucExpectedTag) {
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bResult = false;
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*pErrorClass = ERROR_CLASS_PROPERTY;
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*pErrorCode = ERROR_CODE_INVALID_DATA_TYPE;
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}
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return(bResult);
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}
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