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Patrick Grimm
2013-03-21 22:53:31 +01:00
parent 5668c55fca
commit 01349ec9e8
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ports/atmega168/h_rp.c Normal file
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/**************************************************************************
*
* Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*********************************************************************/
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "config.h"
#include "txbuf.h"
#include "bacdef.h"
#include "bacdcode.h"
#include "bacerror.h"
#include "apdu.h"
#include "npdu.h"
#include "abort.h"
#include "rp.h"
/* demo objects */
#include "device.h"
#include "av.h"
#include "bv.h"
/* Encodes the property APDU and returns the length,
or sets the error, and returns -1 */
int Encode_Property_APDU(
uint8_t * apdu,
BACNET_READ_PROPERTY_DATA * rp_data,
BACNET_ERROR_CLASS * error_class,
BACNET_ERROR_CODE * error_code)
{
int apdu_len = -1;
/* handle each object type */
switch (rp_data->object_type) {
case OBJECT_DEVICE:
/* Test for case of indefinite Device object instance */
if (rp_data->object_instance == BACNET_MAX_INSTANCE) {
rp_data->object_instance = Device_Object_Instance_Number();
}
if (Device_Valid_Object_Instance_Number(rp_data->object_instance)) {
apdu_len =
Device_Encode_Property_APDU(&apdu[0],
rp_data->object_instance, rp_data->object_property,
rp_data->array_index, error_class, error_code);
}
break;
case OBJECT_ANALOG_VALUE:
if (Analog_Value_Valid_Instance(rp_data->object_instance)) {
apdu_len =
Analog_Value_Encode_Property_APDU(&apdu[0],
rp_data->object_instance, rp_data->object_property,
rp_data->array_index, error_class, error_code);
}
break;
case OBJECT_BINARY_VALUE:
if (Binary_Value_Valid_Instance(rp_data->object_instance)) {
apdu_len =
Binary_Value_Encode_Property_APDU(&apdu[0],
rp_data->object_instance, rp_data->object_property,
rp_data->array_index, error_class, error_code);
}
break;
default:
*error_class = ERROR_CLASS_OBJECT;
*error_code = ERROR_CODE_UNKNOWN_OBJECT;
break;
}
return apdu_len;
}
void handler_read_property(
uint8_t * service_request,
uint16_t service_len,
BACNET_ADDRESS * src,
BACNET_CONFIRMED_SERVICE_DATA * service_data)
{
BACNET_READ_PROPERTY_DATA data;
int len = 0;
int ack_len = 0;
int property_len = 0;
int pdu_len = 0;
BACNET_NPDU_DATA npdu_data;
int bytes_sent = 0;
BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
BACNET_ADDRESS my_address;
/* encode the NPDU portion of the packet */
datalink_get_my_address(&my_address);
npdu_encode_npdu_data(&npdu_data, false, MESSAGE_PRIORITY_NORMAL);
pdu_len =
npdu_encode_pdu(&Handler_Transmit_Buffer[0], src, &my_address,
&npdu_data);
if (service_data->segmented_message) {
/* we don't support segmentation - send an abort */
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_SEGMENTATION_NOT_SUPPORTED,
true);
goto RP_ABORT;
}
len = rp_decode_service_request(service_request, service_len, &data);
if (len < 0) {
/* bad decoding - send an abort */
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_OTHER, true);
goto RP_ABORT;
}
/* most cases will be error */
ack_len =
rp_ack_encode_apdu_init(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, &data);
/* FIXME: add buffer len as passed into function or use smart buffer */
property_len =
Encode_Property_APDU(&Handler_Transmit_Buffer[pdu_len + ack_len],
&data, &error_class, &error_code);
if (property_len >= 0) {
len =
rp_ack_encode_apdu_object_property_end(&Handler_Transmit_Buffer
[pdu_len + property_len + ack_len]);
len += ack_len + property_len;
} else {
switch (property_len) {
/* BACnet APDU too small to fit data, so proper response is Abort */
case BACNET_STATUS_ABORT:
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
break;
default:
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_READ_PROPERTY,
error_class, error_code);
break;
}
}
RP_ABORT:
pdu_len += len;
bytes_sent =
datalink_send_pdu(src, &npdu_data, &Handler_Transmit_Buffer[0],
pdu_len);
return;
}