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Replaced gotos in handler code (#109)

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This commit is contained in:
Roy Schneider
2020-08-13 17:18:50 +02:00
committed by GitHub
parent f41b5377cc
commit 993acb494a
2 changed files with 137 additions and 112 deletions
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src/bacnet/basic/service/h_rr.c
+70 -50
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@@ -45,8 +45,20 @@
static uint8_t Temp_Buf[MAX_APDU] = { 0 };
/* Encodes the property APDU and returns the length,
or sets the error, and returns -1 */
/**
* Encodes the property APDU and returns the length,
* or sets the error, and returns -1.
*
* @param apdu Pointer to the APDU buffer.
* @param pRequest Pointer to the request to encode.
*
* @return Bytes encoded or -1 on an error. The error code
* may also be a negative return value from the called
* handler of 'PropInfo.Handler' type from within
* this function. The error code might be -2, if an
* abort message has been encoded, because the APDU
* was too small to fit the data.
*/
static int Encode_RR_payload(uint8_t *apdu, BACNET_READ_RANGE_DATA *pRequest)
{
int apdu_len = -1;
@@ -99,6 +111,15 @@ static int Encode_RR_payload(uint8_t *apdu, BACNET_READ_RANGE_DATA *pRequest)
return apdu_len;
}
/**
* Handle the received ReadRange request and encode a response.
*
* @param service_request Pointer to the service request.
* @param service_len Bytes valid in the service request.
* @param src Pointer to the BACnet addresss.
* @param service_data Pointer to the service data,
* taken from the request.
*/
void handler_read_range(uint8_t *service_request,
uint16_t service_len,
BACNET_ADDRESS *src,
@@ -129,58 +150,57 @@ void handler_read_range(uint8_t *service_request,
#if PRINT_ENABLED
fprintf(stderr, "RR: Segmented message. Sending Abort!\n");
#endif
goto RR_ABORT;
}
memset(&data, 0, sizeof(data)); /* start with blank canvas */
len = rr_decode_service_request(service_request, service_len, &data);
#if PRINT_ENABLED
if (len <= 0)
fprintf(stderr, "RR: Unable to decode Request!\n");
#endif
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);
#if PRINT_ENABLED
fprintf(stderr, "RR: Bad Encoding. Sending Abort!\n");
#endif
goto RR_ABORT;
}
/* assume that there is an error */
error = true;
len = Encode_RR_payload(&Temp_Buf[0], &data);
if (len >= 0) {
/* encode the APDU portion of the packet */
data.application_data = &Temp_Buf[0];
data.application_data_len = len;
/* FIXME: probably need a length limitation sent with encode */
len = rr_ack_encode_apdu(
&Handler_Transmit_Buffer[pdu_len], service_data->invoke_id, &data);
#if PRINT_ENABLED
fprintf(stderr, "RR: Sending Ack!\n");
#endif
error = false;
}
if (error) {
if (len == -2) {
/* BACnet APDU too small to fit data, so proper response is Abort */
} else {
memset(&data, 0, sizeof(data)); /* start with blank canvas */
len = rr_decode_service_request(service_request, service_len, &data);
#if PRINT_ENABLED
if (len <= 0)
fprintf(stderr, "RR: Unable to decode Request!\n");
#endif
if (len < 0) {
/* bad decoding - send an abort */
len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
#if PRINT_ENABLED
fprintf(stderr, "RR: Reply too big to fit into APDU!\n");
#endif
service_data->invoke_id, ABORT_REASON_OTHER, true);
#if PRINT_ENABLED
fprintf(stderr, "RR: Bad Encoding. Sending Abort!\n");
#endif
} else {
len = bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_READ_RANGE,
data.error_class, data.error_code);
#if PRINT_ENABLED
fprintf(stderr, "RR: Sending Error!\n");
#endif
/* assume that there is an error */
error = true;
len = Encode_RR_payload(&Temp_Buf[0], &data);
if (len >= 0) {
/* encode the APDU portion of the packet */
data.application_data = &Temp_Buf[0];
data.application_data_len = len;
/* FIXME: probably need a length limitation sent with encode */
len = rr_ack_encode_apdu(
&Handler_Transmit_Buffer[pdu_len], service_data->invoke_id, &data);
#if PRINT_ENABLED
fprintf(stderr, "RR: Sending Ack!\n");
#endif
error = false;
}
if (error) {
if (len == -2) {
/* BACnet APDU too small to fit data, so proper response is Abort */
len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
#if PRINT_ENABLED
fprintf(stderr, "RR: Reply too big to fit into APDU!\n");
#endif
} else {
len = bacerror_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, SERVICE_CONFIRMED_READ_RANGE,
data.error_class, data.error_code);
#if PRINT_ENABLED
fprintf(stderr, "RR: Sending Error!\n");
#endif
}
}
}
}
RR_ABORT:
pdu_len += len;
#if PRINT_ENABLED
bytes_sent =