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Added function rp_ack_fully_decode_service_request() to parse and return the same structure as RPM (but the list has just one property). Convenient when you want to switch hit between RP and RPM.

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Put it in the handler/h_rp_a.c file since I wasn't sure if we wanted it in the stack src itself.
This commit is contained in:
tbrennan3
2010-04-15 20:48:06 +00:00
parent c5977b8933
commit 1dc93c3a28
2 changed files with 100 additions and 0 deletions
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bacnet-stack/demo/handler/h_rp_a.c
+92
View File
@@ -137,3 +137,95 @@ void handler_read_property_ack(
if (len > 0)
PrintReadPropertyData(&data);
}
/** Decode the received RP data into a linked list of the results, with the
* same data structure used by RPM ACK replies.
* This function is provided to provide common handling for RP and RPM data,
* and fully decodes the value(s) portion of the data for one property.
* @ingroup DSRP
* @see rp_ack_decode_service_request(), rpm_ack_decode_service_request()
*
* @param apdu [in] The received apdu data.
* @param apdu_len [in] Total length of the apdu.
* @param read_access_data [out] Pointer to the head of the linked list
* where the RP data is to be stored.
* @return Number of decoded bytes (could be less than apdu_len),
* or -1 on decoding error.
*/
int rp_ack_fully_decode_service_request(
uint8_t * apdu,
int apdu_len,
BACNET_READ_ACCESS_DATA * read_access_data)
{
int decoded_len = 0; /* return value */
BACNET_READ_PROPERTY_DATA rp1data;
BACNET_PROPERTY_REFERENCE *rp1_property; /* single property */
BACNET_APPLICATION_DATA_VALUE *value, *old_value;
uint8_t * vdata;
int vlen, len;
decoded_len = rp_ack_decode_service_request(apdu, apdu_len, &rp1data);
if ( decoded_len > 0 )
{
/* Then we have to transfer to the BACNET_READ_ACCESS_DATA structure
* and decode the value(s) portion
*/
read_access_data->object_type = rp1data.object_type;
read_access_data->object_instance = rp1data.object_instance;
rp1_property = calloc(1, sizeof(BACNET_PROPERTY_REFERENCE));
read_access_data->listOfProperties = rp1_property;
if ( rp1_property == NULL )
return -1; /* can't proceed if calloc failed. */
rp1_property->propertyIdentifier = rp1data.object_property;
rp1_property->propertyArrayIndex = rp1data.array_index;
/* Is there no Error case possible here, as there is when decoding RPM? */
/* rp1_property->error.error_class = ?? */
/* rp_ack_decode_service_request() processing already removed the
* Opening and Closing '3' Tags.
* note: if this is an array, there will be
more than one element to decode */
vdata = rp1data.application_data;
vlen = rp1data.application_data_len;
value = calloc(1, sizeof(BACNET_APPLICATION_DATA_VALUE));
rp1_property->value = value;
old_value = value;
while (value && vdata && (vlen > 0)) {
if (IS_CONTEXT_SPECIFIC(*vdata)) {
len =
bacapp_decode_context_data(vdata, vlen, value,
rp1_property->propertyIdentifier);
} else {
len =
bacapp_decode_application_data(vdata, vlen,
value);
}
decoded_len += len;
vlen -= len;
vdata += len;
/* If unexpected closing tag here: */
if (vlen && decode_is_closing_tag_number(vdata, 3)) {
decoded_len++;
vlen--;
vdata++;
break;
} else {
/* nothing decoded and no closing tag, so malformed */
if (len == 0) {
free( value );
free( rp1_property );
read_access_data->listOfProperties = NULL;
return -1;
}
if ( vlen > 0 ) /* If more values */
{
old_value = value;
value =
calloc(1, sizeof(BACNET_APPLICATION_DATA_VALUE));
old_value->next = value;
}
}
}
}
return decoded_len;
}
bacnet-stack/include/rp.h
+8
View File
@@ -50,6 +50,9 @@ typedef struct BACnet_Read_Property_Data {
BACNET_ERROR_CODE error_code;
} BACNET_READ_PROPERTY_DATA;
/* Forward declaration of RPM-style data structure */
struct BACnet_Read_Access_Data;
/** Reads one property for this object type of a given instance.
* A function template; @see device.c for assignment to object types.
* @ingroup ObjHelpers
@@ -99,6 +102,11 @@ extern "C" {
int apdu_len, /* total length of the apdu */
BACNET_READ_PROPERTY_DATA * rpdata);
/* Decode instead to RPM-style data structure. */
int rp_ack_fully_decode_service_request(
uint8_t * apdu,
int apdu_len,
struct BACnet_Read_Access_Data * read_access_data);
#ifdef TEST
#include "ctest.h"