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Corrected bug in all confirmed handlers: if a segmented message was received, the handler tried to decode it instead of immediately sending an abort. This caused lockup with WriteProperty.

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This commit is contained in:
skarg
2007-08-18 00:06:48 +00:00
parent 31d78501c0
commit cc4c46b84d
8 changed files with 462 additions and 445 deletions
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bacnet-stack/demo/handler/h_rp.c
+45 -41
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@@ -199,75 +199,79 @@ void handler_read_property(uint8_t * service_request,
BACNET_ERROR_CODE error_code = ERROR_CODE_UNKNOWN_OBJECT;
BACNET_ADDRESS my_address;
len = rp_decode_service_request(service_request, service_len, &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);
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);
#if PRINT_ENABLED
fprintf(stderr, "RP: Segmented message. Sending Abort!\n");
#endif
goto RP_ABORT;
}
len = rp_decode_service_request(service_request, service_len, &data);
#if PRINT_ENABLED
if (len <= 0)
fprintf(stderr, "Unable to decode Read-Property Request!\n");
fprintf(stderr, "RP: 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, "Sending Abort!\n");
fprintf(stderr, "RP: Bad Encoding. Sending Abort!\n");
#endif
} else 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;
}
/* assume that there is an error */
error = true;
len = Encode_Property_APDU(
&Temp_Buf[0],
data.object_type,
data.object_instance,
data.object_property,
data.array_index,
&error_class, &error_code);
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 =
rp_ack_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, &data);
#if PRINT_ENABLED
fprintf(stderr, "Sending Abort!\n");
fprintf(stderr,
"RP: Sending Ack!\n");
#endif
} else {
/* most cases will be error */
error = true;
len = Encode_Property_APDU(
&Temp_Buf[0],
data.object_type,
data.object_instance,
data.object_property,
data.array_index,
&error_class, &error_code);
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 =
rp_ack_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id, &data);
#if PRINT_ENABLED
fprintf(stderr,
"Sending Read Property Ack!\n");
#endif
error = false;
}
error = false;
}
if (error) {
switch (len) {
if (len == -2) {
/* BACnet APDU too small to fit data, so proper response is Abort */
case -2:
len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
service_data->invoke_id,
ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);
break;
case -1:
default:
#if PRINT_ENABLED
fprintf(stderr, "RP: 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_PROPERTY, error_class, error_code);
break;
}
#if PRINT_ENABLED
fprintf(stderr, "Sending Read Property Error!\n");
fprintf(stderr, "RP: Sending Error!\n");
#endif
}
}
RP_ABORT:
pdu_len += len;
bytes_sent = datalink_send_pdu(src, &npdu_data,
&Handler_Transmit_Buffer[0], pdu_len);