skarg
376 lines
14 KiB
C
376 lines
14 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2007 Steve Karg <skarg@users.sourceforge.net>
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* Inspired by John Stachler <John.Stachler@lennoxind.com>
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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 "config.h"
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#include "txbuf.h"
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#include "memcopy.h"
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#include "bacdef.h"
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#include "bacdcode.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 "rpm.h"
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#include "handlers.h"
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/* device object has custom handler for all objects */
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#include "device.h"
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/** @file h_rpm.c Handles Read Property Multiple requests. */
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static uint8_t Temp_Buf[MAX_APDU] = { 0 };
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static BACNET_PROPERTY_ID RPM_Object_Property(
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struct special_property_list_t *pPropertyList,
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BACNET_PROPERTY_ID special_property,
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unsigned index)
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{
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int property = -1; /* return value */
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unsigned required, optional, proprietary;
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required = pPropertyList->Required.count;
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optional = pPropertyList->Optional.count;
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proprietary = pPropertyList->Proprietary.count;
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if (special_property == PROP_ALL) {
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if (index < required) {
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property = pPropertyList->Required.pList[index];
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} else if (index < (required + optional)) {
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index -= required;
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property = pPropertyList->Optional.pList[index];
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} else if (index < (required + optional + proprietary)) {
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index -= (required + optional);
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property = pPropertyList->Proprietary.pList[index];
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}
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} else if (special_property == PROP_REQUIRED) {
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if (index < required) {
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property = pPropertyList->Required.pList[index];
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}
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} else if (special_property == PROP_OPTIONAL) {
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if (index < optional) {
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property = pPropertyList->Optional.pList[index];
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}
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}
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return (BACNET_PROPERTY_ID)property;
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}
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static unsigned RPM_Object_Property_Count(
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struct special_property_list_t *pPropertyList,
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BACNET_PROPERTY_ID special_property)
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{
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unsigned count = 0; /* return value */
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if (special_property == PROP_ALL) {
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count =
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pPropertyList->Required.count + pPropertyList->Optional.count +
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pPropertyList->Proprietary.count;
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} else if (special_property == PROP_REQUIRED) {
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count = pPropertyList->Required.count;
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} else if (special_property == PROP_OPTIONAL) {
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count = pPropertyList->Optional.count;
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}
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return count;
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}
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/* Encode the RPM property returning the length of the encoding,
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or 0 if there is no room to fit the encoding. */
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static int RPM_Encode_Property(
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uint8_t * apdu,
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uint16_t offset,
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uint16_t max_apdu,
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BACNET_OBJECT_TYPE object_type,
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uint32_t object_instance,
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BACNET_PROPERTY_ID object_property,
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int32_t array_index)
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{
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int len = 0;
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size_t copy_len = 0;
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int apdu_len = 0;
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BACNET_READ_PROPERTY_DATA rpdata;
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len =
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rpm_ack_encode_apdu_object_property(&Temp_Buf[0], object_property,
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array_index);
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copy_len = memcopy(&apdu[0], &Temp_Buf[0], offset, len, max_apdu);
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if (copy_len == 0) {
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return 0;
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}
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apdu_len += len;
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len = 0;
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rpdata.error_class = ERROR_CLASS_OBJECT;
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rpdata.error_code = ERROR_CODE_UNKNOWN_OBJECT;
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rpdata.object_type = object_type;
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rpdata.object_instance = object_instance;
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rpdata.object_property = object_property;
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rpdata.array_index = array_index;
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rpdata.application_data = &Temp_Buf[0];
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rpdata.application_data_len = sizeof(Temp_Buf);
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len = Device_Read_Property(&rpdata);
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if (len < 0) {
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/* error was returned - encode that for the response */
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len =
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rpm_ack_encode_apdu_object_property_error(&Temp_Buf[0],
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rpdata.error_class, rpdata.error_code);
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copy_len =
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memcopy(&apdu[0], &Temp_Buf[0], offset + apdu_len, len, max_apdu);
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if (copy_len == 0) {
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return 0;
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}
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} else if ((offset + apdu_len + 1 + len + 1) < max_apdu) {
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/* enough room to fit the property value and tags */
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len =
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rpm_ack_encode_apdu_object_property_value(&apdu[offset + apdu_len],
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&Temp_Buf[0], len);
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} else {
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/* not enough room - abort! */
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return 0;
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}
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apdu_len += len;
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return apdu_len;
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}
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void handler_read_property_multiple(
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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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int len = 0;
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int copy_len = 0;
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int decode_len = 0;
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int pdu_len = 0;
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BACNET_NPDU_DATA npdu_data;
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int bytes_sent;
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BACNET_ADDRESS my_address;
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BACNET_OBJECT_TYPE object_type;
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uint32_t object_instance = 0;
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int apdu_len = 0;
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int npdu_len = 0;
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BACNET_PROPERTY_ID object_property;
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int32_t array_index = 0;
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/* jps_debug - see if we are utilizing all the buffer */
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/* memset(&Handler_Transmit_Buffer[0], 0xff, sizeof(Handler_Transmit_Buffer)); */
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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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npdu_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 (service_data->segmented_message) {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer[npdu_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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printf("RPM: Segmented message. Sending Abort!\r\n");
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#endif
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goto RPM_ABORT;
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}
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/* decode apdu request & encode apdu reply
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encode complex ack, invoke id, service choice */
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apdu_len =
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rpm_ack_encode_apdu_init(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id);
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do {
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len =
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rpm_decode_object_id(&service_request[decode_len],
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service_len - decode_len, &object_type, &object_instance);
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/* end of object? */
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if (len > 0) {
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decode_len += len;
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} else {
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len =
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rpm_decode_object_end(&service_request[decode_len],
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service_len - decode_len);
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if (len == 1) {
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decode_len++;
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len = rpm_ack_encode_apdu_object_end(&Temp_Buf[0]);
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copy_len =
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memcopy(&Handler_Transmit_Buffer[npdu_len], &Temp_Buf[0],
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apdu_len, len, sizeof(Handler_Transmit_Buffer));
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if (!copy_len) {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id,
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ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
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goto RPM_ABORT;
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} else {
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apdu_len += copy_len;
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}
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} else {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id, ABORT_REASON_OTHER, true);
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goto RPM_ABORT;
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}
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break;
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}
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len =
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rpm_ack_encode_apdu_object_begin(&Temp_Buf[0], object_type,
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object_instance);
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copy_len =
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memcopy(&Handler_Transmit_Buffer[npdu_len], &Temp_Buf[0], apdu_len,
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len, sizeof(Handler_Transmit_Buffer));
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if (!copy_len) {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id,
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ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
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goto RPM_ABORT;
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} else {
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apdu_len += copy_len;
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}
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/* do each property of this object of the RPM request */
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do {
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len =
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rpm_decode_object_property(&service_request[decode_len],
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service_len - decode_len, &object_property, &array_index);
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/* end of property list? */
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if (len > 0) {
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decode_len += len;
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} else {
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len =
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rpm_decode_object_end(&service_request[decode_len],
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service_len - decode_len);
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if (len == 1) {
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decode_len++;
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len = rpm_ack_encode_apdu_object_end(&Temp_Buf[0]);
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copy_len =
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memcopy(&Handler_Transmit_Buffer[npdu_len],
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&Temp_Buf[0], apdu_len, len,
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sizeof(Handler_Transmit_Buffer));
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if (!copy_len) {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer
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[npdu_len], service_data->invoke_id,
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ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
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goto RPM_ABORT;
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} else {
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apdu_len += copy_len;
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}
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} else {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id, ABORT_REASON_OTHER, true);
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goto RPM_ABORT;
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}
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/* stop decoding properties */
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break;
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}
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/* handle the special properties */
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if ((object_property == PROP_ALL) ||
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(object_property == PROP_REQUIRED) ||
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(object_property == PROP_OPTIONAL)) {
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struct special_property_list_t property_list;
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unsigned property_count = 0;
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unsigned index = 0;
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BACNET_PROPERTY_ID special_object_property;
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special_object_property = object_property;
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Device_Objects_Property_List(object_type, &property_list);
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property_count =
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RPM_Object_Property_Count(&property_list,
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special_object_property);
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if (property_count == 0) {
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/* handle the error code - but use the special property */
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len =
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RPM_Encode_Property(&Handler_Transmit_Buffer[0],
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npdu_len + apdu_len, MAX_APDU, object_type,
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object_instance, object_property, array_index);
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if (len > 0) {
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apdu_len += len;
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} else {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer
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[npdu_len], service_data->invoke_id,
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ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
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goto RPM_ABORT;
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}
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} else {
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for (index = 0; index < property_count; index++) {
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object_property =
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RPM_Object_Property(&property_list,
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special_object_property, index);
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len =
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RPM_Encode_Property(&Handler_Transmit_Buffer[0],
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npdu_len + apdu_len, MAX_APDU, object_type,
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object_instance, object_property, array_index);
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if (len > 0) {
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apdu_len += len;
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} else {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer
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[npdu_len], service_data->invoke_id,
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ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
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goto RPM_ABORT;
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}
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}
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}
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} else {
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/* handle an individual property */
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len =
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RPM_Encode_Property(&Handler_Transmit_Buffer[0],
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npdu_len + apdu_len, sizeof(Handler_Transmit_Buffer),
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object_type, object_instance, object_property,
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array_index);
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if (len > 0) {
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apdu_len += len;
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} else {
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id,
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ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
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goto RPM_ABORT;
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}
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}
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} while (1);
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if (decode_len >= service_len) {
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break;
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}
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} while (1);
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if (apdu_len > service_data->max_resp) {
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/* too big for the sender - send an abort */
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apdu_len =
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abort_encode_apdu(&Handler_Transmit_Buffer[npdu_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, "RPM: Message too large. Sending Abort!\n");
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#endif
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goto RPM_ABORT;
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}
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RPM_ABORT:
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pdu_len = apdu_len + npdu_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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}
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