int wp_decode_apdu(
uint8_t * apdu,
unsigned apdu_len,
uint8_t * invoke_id,
BACNET_WRITE_PROPERTY_DATA * wpdata)
{
int len = 0;
unsigned offset = 0;
if (!apdu)
return -1;
/* optional checking - most likely was already done prior to this call */
if (apdu[0] != PDU_TYPE_CONFIRMED_SERVICE_REQUEST)
return -1;
/* apdu[1] = encode_max_segs_max_apdu(0, MAX_APDU); */
*invoke_id = apdu[2]; /* invoke id - filled in by net layer */
if (apdu[3] != SERVICE_CONFIRMED_WRITE_PROPERTY)
return -1;
offset = 4;
if (apdu_len > offset) {
len =
wp_decode_service_request(&apdu[offset], apdu_len - offset,
wpdata);
}
return len;
}
/** Handler for a WriteProperty Service request.
* @ingroup DSWP
* This handler will be invoked by apdu_handler() if it has been enabled
* by a call to apdu_set_confirmed_handler().
* This handler builds a response packet, which is
* - an Abort if
* - the message is segmented
* - if decoding fails
* - an ACK if Device_Write_Property() succeeds
* - an Error if Device_Write_Property() fails
* or there isn't enough room in the APDU to fit the data.
*
* @param service_request [in] The contents of the service request.
* @param service_len [in] The length of the service_request.
* @param src [in] BACNET_ADDRESS of the source of the message
* @param service_data [in] The BACNET_CONFIRMED_SERVICE_DATA information
* decoded from the APDU header of this message.
*/
void handler_write_property(
uint8_t * service_request,
uint16_t service_len,
BACNET_ADDRESS * src,
BACNET_CONFIRMED_SERVICE_DATA * service_data)
{
BACNET_WRITE_PROPERTY_DATA wp_data;
int len = 0;
int pdu_len = 0;
BACNET_NPDU_DATA npdu_data;
int bytes_sent = 0;
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 PRINT_ENABLED
fprintf(stderr, "WP: Received Request!\n");
#endif
if (service_data->segmented_message) {
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_SEGMENTATION_NOT_SUPPORTED,
true);
#if PRINT_ENABLED
fprintf(stderr, "WP: Segmented message. Sending Abort!\n");
#endif
goto WP_ABORT;
} /* decode the service request only */
len = wp_decode_service_request(service_request, service_len, &wp_data);
#if PRINT_ENABLED
if (len > 0)
fprintf(stderr,
"WP: type=%lu instance=%lu property=%lu priority=%lu index=%ld\n",
(unsigned long) wp_data.object_type,
(unsigned long) wp_data.object_instance,
(unsigned long) wp_data.object_property,
(unsigned long) wp_data.priority, (long) wp_data.array_index);
else
fprintf(stderr, "WP: Unable to decode Request!\n");
#endif
/* bad decoding or something we didn't understand - send an abort */
if (len <= 0) {
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_OTHER, true);
#if PRINT_ENABLED
fprintf(stderr, "WP: Bad Encoding. Sending Abort!\n");
#endif
goto WP_ABORT;
}
if (Device_Write_Property(&wp_data)) {
len =
encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY);
#if PRINT_ENABLED
fprintf(stderr, "WP: Sending Simple Ack!\n");
#endif
} else {
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
wp_data.error_class, wp_data.error_code);
#if PRINT_ENABLED
fprintf(stderr, "WP: Sending Error!\n");
#endif
}
WP_ABORT:
pdu_len += len;
bytes_sent =
datalink_send_pdu(src, &npdu_data, &Handler_Transmit_Buffer[0],
pdu_len);
#if PRINT_ENABLED
if (bytes_sent <= 0) {
fprintf(stderr, "WP: Failed to send PDU (%s)!\n", strerror(errno));
}
#else
bytes_sent = bytes_sent;
#endif
return;
}
void handler_write_property(
uint8_t * service_request,
uint16_t service_len,
BACNET_ADDRESS * src,
BACNET_CONFIRMED_SERVICE_DATA * service_data)
{
int len = 0;
int pdu_len = 0;
BACNET_NPDU_DATA npdu_data;
BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
int bytes_sent = 0;
BACNET_ADDRESS my_address;
/* decode the service request only */
len = wp_decode_service_request(service_request, service_len, &wp_data);
/* 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);
/* bad decoding or something we didn't understand - send an abort */
if (len <= 0) {
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_OTHER, true);
} else if (service_data->segmented_message) {
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_SEGMENTATION_NOT_SUPPORTED,
true);
} else {
switch (wp_data.object_type) {
case OBJECT_DEVICE:
if (Device_Write_Property(&wp_data, &error_class, &error_code)) {
len =
encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
SERVICE_CONFIRMED_WRITE_PROPERTY);
} else {
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
SERVICE_CONFIRMED_WRITE_PROPERTY, error_class,
error_code);
}
break;
case OBJECT_ANALOG_VALUE:
if (Analog_Value_Write_Property(&wp_data, &error_class,
&error_code)) {
len =
encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
SERVICE_CONFIRMED_WRITE_PROPERTY);
} else {
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
SERVICE_CONFIRMED_WRITE_PROPERTY, error_class,
error_code);
}
break;
case OBJECT_BINARY_VALUE:
if (Binary_Value_Write_Property(&wp_data, &error_class,
&error_code)) {
len =
encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
SERVICE_CONFIRMED_WRITE_PROPERTY);
} else {
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
SERVICE_CONFIRMED_WRITE_PROPERTY, error_class,
error_code);
}
break;
default:
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
error_class, error_code);
break;
}
}
pdu_len += len;
bytes_sent =
datalink_send_pdu(src, &npdu_data, &Handler_Transmit_Buffer[0],
pdu_len);
return;
}
void handler_write_property(
uint8_t * service_request,
uint16_t service_len,
BACNET_ADDRESS * src,
BACNET_CONFIRMED_SERVICE_DATA * service_data)
{
int len = 0;
int pdu_len = 0;
BACNET_NPDU_DATA npdu_data;
BACNET_ERROR_CLASS error_class = ERROR_CLASS_OBJECT;
BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
int bytes_sent = 0;
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) {
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_SEGMENTATION_NOT_SUPPORTED,
true);
goto WP_ABORT;
}
/* decode the service request only */
len = wp_decode_service_request(service_request, service_len, &wp_data);
/* bad decoding or something we didn't understand - send an abort */
if (len <= 0) {
len =
abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, ABORT_REASON_OTHER, true);
goto WP_ABORT;
}
switch (wp_data.object_type) {
case OBJECT_DEVICE:
if (Device_Write_Property(&wp_data, &error_class, &error_code)) {
len =
encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY);
#if PRINT_ENABLED
fprintf(stderr,
"Sending Write Property Simple Ack for Device!\n");
#endif
} else {
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
error_class, error_code);
#if PRINT_ENABLED
fprintf(stderr, "Sending Write Property Error for Device!\n");
#endif
}
break;
case OBJECT_ANALOG_INPUT:
case OBJECT_BINARY_INPUT:
error_class = ERROR_CLASS_PROPERTY;
error_code = ERROR_CODE_WRITE_ACCESS_DENIED;
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
error_class, error_code);
#if PRINT_ENABLED
fprintf(stderr, "Sending Write Access Error!\n");
#endif
break;
case OBJECT_BINARY_VALUE:
if (Binary_Value_Write_Property(&wp_data, &error_class,
&error_code)) {
len =
encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY);
#if PRINT_ENABLED
fprintf(stderr, "Sending Write Property Simple Ack for BV!\n");
#endif
} else {
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
error_class, error_code);
#if PRINT_ENABLED
fprintf(stderr, "Sending Write Access Error for BV!\n");
#endif
}
break;
case OBJECT_ANALOG_VALUE:
if (Analog_Value_Write_Property(&wp_data, &error_class,
&error_code)) {
len =
encode_simple_ack(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY);
#if PRINT_ENABLED
fprintf(stderr, "Sending Write Property Simple Ack for AV!\n");
#endif
} else {
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
error_class, error_code);
#if PRINT_ENABLED
fprintf(stderr, "Sending Write Access Error for AV!\n");
#endif
}
break;
default:
len =
bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_WRITE_PROPERTY,
error_class, error_code);
#if PRINT_ENABLED
fprintf(stderr, "Sending Unknown Object Error!\n");
#endif
break;
}
WP_ABORT:
pdu_len += len;
bytes_sent =
datalink_send_pdu(src, &npdu_data, &Handler_Transmit_Buffer[0],
pdu_len);
#if PRINT_ENABLED
if (bytes_sent <= 0)
fprintf(stderr, "Failed to send PDU (%s)!\n", strerror(errno));
#endif
return;
}
