adjust root folder
This commit is contained in:
Steve Karg
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/**************************************************************************
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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 "bacdevobjpropref.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 "reject.h"
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#include "rp.h"
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/* device object has custom handler for all objects */
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#include "device.h"
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#include "handlers.h"
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/** @file h_rp.c Handles Read Property requests. */
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/** Handler for a ReadProperty Service request.
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* @ingroup DSRP
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* This handler will be invoked by apdu_handler() if it has been enabled
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* by a call to apdu_set_confirmed_handler().
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* This handler builds a response packet, which is
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* - an Abort if
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* - the message is segmented
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* - if decoding fails
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* - if the response would be too large
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* - the result from Device_Read_Property(), if it succeeds
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* - an Error if Device_Read_Property() fails
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* or there isn't enough room in the APDU to fit the data.
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*
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* @param service_request [in] The contents of the service request.
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* @param service_len [in] The length of the service_request.
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* @param src [in] BACNET_ADDRESS of the source of the message
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* @param service_data [in] The BACNET_CONFIRMED_SERVICE_DATA information
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* decoded from the APDU header of this message.
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*/
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void handler_read_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_READ_PROPERTY_DATA rpdata;
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int len = 0;
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int pdu_len = 0;
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int apdu_len = -1;
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int npdu_len = -1;
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BACNET_NPDU_DATA npdu_data;
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bool error = true; /* assume that there is an error */
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int bytes_sent = 0;
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BACNET_ADDRESS my_address;
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/* configure default error code as an abort since it is common */
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rpdata.error_code = ERROR_CODE_ABORT_SEGMENTATION_NOT_SUPPORTED;
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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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/* we don't support segmentation - send an abort */
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len = BACNET_STATUS_ABORT;
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Segmented message. Sending Abort!\n");
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#endif
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goto RP_FAILURE;
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}
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len = rp_decode_service_request(service_request, service_len, &rpdata);
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#if PRINT_ENABLED
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if (len <= 0) {
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fprintf(stderr, "RP: Unable to decode Request!\n");
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}
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#endif
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if (len < 0) {
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/* bad decoding - skip to error/reject/abort handling */
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error = true;
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Bad Encoding.\n");
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#endif
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goto RP_FAILURE;
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}
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/* Test for case of indefinite Device object instance */
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if ((rpdata.object_type == OBJECT_DEVICE) &&
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(rpdata.object_instance == BACNET_MAX_INSTANCE)) {
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rpdata.object_instance = Device_Object_Instance_Number();
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}
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apdu_len =
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rp_ack_encode_apdu_init(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id, &rpdata);
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/* configure our storage */
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rpdata.application_data = &Handler_Transmit_Buffer[npdu_len + apdu_len];
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rpdata.application_data_len =
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sizeof(Handler_Transmit_Buffer) - (npdu_len + apdu_len);
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len = Device_Read_Property(&rpdata);
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if (len >= 0) {
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apdu_len += len;
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len =
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rp_ack_encode_apdu_object_property_end(&Handler_Transmit_Buffer
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[npdu_len + apdu_len]);
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apdu_len += len;
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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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* Setting of error code needed here as read property processing may
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* have overriden the default set at start */
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rpdata.error_code = ERROR_CODE_ABORT_SEGMENTATION_NOT_SUPPORTED;
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len = BACNET_STATUS_ABORT;
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Message too large.\n");
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#endif
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} else {
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Sending Ack!\n");
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#endif
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error = false;
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}
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} else {
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Device_Read_Property: ");
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if (len == BACNET_STATUS_ABORT) {
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fprintf(stderr, "Abort!\n");
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} else if (len == BACNET_STATUS_ERROR) {
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fprintf(stderr, "Error!\n");
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} else if (len == BACNET_STATUS_REJECT) {
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fprintf(stderr, "Reject!\n");
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} else {
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fprintf(stderr, "Unknown Len=%d\n", len);
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}
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#endif
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}
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RP_FAILURE:
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if (error) {
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if (len == BACNET_STATUS_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,
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abort_convert_error_code(rpdata.error_code), true);
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Sending Abort!\n");
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#endif
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} else if (len == BACNET_STATUS_ERROR) {
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apdu_len =
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bacerror_encode_apdu(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id, SERVICE_CONFIRMED_READ_PROPERTY,
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rpdata.error_class, rpdata.error_code);
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Sending Error!\n");
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#endif
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} else if (len == BACNET_STATUS_REJECT) {
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apdu_len =
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reject_encode_apdu(&Handler_Transmit_Buffer[npdu_len],
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service_data->invoke_id,
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reject_convert_error_code(rpdata.error_code));
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#if PRINT_ENABLED
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fprintf(stderr, "RP: Sending Reject!\n");
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#endif
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}
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}
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pdu_len = npdu_len + apdu_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 (bytes_sent <= 0) {
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#if PRINT_ENABLED
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fprintf(stderr, "Failed to send PDU (%s)!\n", strerror(errno));
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#endif
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}
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return;
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}
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