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119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
/*
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* mms_client_status.c
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*
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* Copyright 2013, 2014 Michael Zillgith
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*
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* This file is part of libIEC61850.
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*
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* libIEC61850 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* libIEC61850 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libIEC61850. If not, see <http://www.gnu.org/licenses/>.
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*
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* See COPYING file for the complete license text.
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*/
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#include "libiec61850_platform_includes.h"
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#include "stack_config.h"
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#include "mms_common.h"
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#include "mms_client_connection.h"
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#include "byte_buffer.h"
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#include "mms_client_internal.h"
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#include "ber_encoder.h"
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#include "ber_decode.h"
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void
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mmsClient_createStatusRequest(uint32_t invokeId, ByteBuffer* request, bool extendedDerivation)
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{
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uint32_t invokeIdSize = BerEncoder_UInt32determineEncodedSize(invokeId);
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uint32_t confirmedRequestPduSize = 2 + 2 + 1 + invokeIdSize;
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int bufPos = 0;
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uint8_t* buffer = request->buffer;
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bufPos = BerEncoder_encodeTL(0xa0, confirmedRequestPduSize, buffer, bufPos);
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bufPos = BerEncoder_encodeTL(0x02, invokeIdSize, buffer, bufPos);
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bufPos = BerEncoder_encodeUInt32(invokeId, buffer, bufPos);
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bufPos = BerEncoder_encodeBoolean(0x80, extendedDerivation, buffer, bufPos);
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request->size = bufPos;
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}
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bool
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mmsClient_parseStatusResponse(MmsConnection self, int* vmdLogicalStatus, int* vmdPhysicalStatus)
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{
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uint8_t* buffer = self->lastResponse->buffer;
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int maxBufPos = self->lastResponse->size;
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int bufPos = self->lastResponseBufPos;
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int length;
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uint8_t tag = buffer[bufPos++];
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if (tag != 0xa0) {
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if (DEBUG_MMS_CLIENT)
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printf("mmsClient_parseStatusResponse: unknown tag %02x\n", tag);
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goto exit_error;
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}
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bufPos = BerDecoder_decodeLength(buffer, &length, bufPos, maxBufPos);
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if (bufPos < 0) goto exit_error;
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int endPos = bufPos + length;
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if (endPos > maxBufPos) {
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if (DEBUG_MMS_CLIENT)
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printf("mmsClient_parseStatusResponse: message to short!\n");
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goto exit_error;
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}
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bool hasPhysicalStatus = false;
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bool hasLogicalStatus = false;
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while (bufPos < endPos) {
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tag = buffer[bufPos++];
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bufPos = BerDecoder_decodeLength(buffer, &length, bufPos, maxBufPos);
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if (bufPos < 0) goto exit_error;
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switch (tag) {
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case 0x80: /* vmdLogicalStatus */
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if (vmdLogicalStatus != NULL)
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*vmdLogicalStatus = BerDecoder_decodeUint32(buffer, length, bufPos);
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hasLogicalStatus = true;
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bufPos += length;
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break;
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case 0x81: /* vmdPhysicalStatus */
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if (vmdPhysicalStatus != NULL)
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*vmdPhysicalStatus = BerDecoder_decodeUint32(buffer, length, bufPos);
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hasPhysicalStatus = true;
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bufPos += length;
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break;
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case 0x82: /* localDetail */
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bufPos += length;
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break;
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default:
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return false;
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}
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}
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if (hasPhysicalStatus && hasLogicalStatus)
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return true;
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exit_error:
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return false;
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}
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