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115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/*
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* mms_client_identify.c
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*
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* Copyright 2013-2018 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_createIdentifyRequest(uint32_t invokeId, ByteBuffer* request)
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{
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uint32_t invokeIdSize = BerEncoder_UInt32determineEncodedSize(invokeId);
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uint32_t confirmedRequestPduSize = 2 + 2 + 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_encodeTL(0x82, 0, buffer, bufPos);
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request->size = bufPos;
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}
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bool
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mmsClient_parseIdentifyResponse(MmsConnection self, ByteBuffer* response, uint32_t respBufPos, uint32_t invokeId, MmsConnection_IdentifyHandler handler, void* parameter)
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{
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uint8_t* buffer = ByteBuffer_getBuffer(response);
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int maxBufPos = ByteBuffer_getSize(response);
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int length;
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int bufPos = (int) respBufPos;
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uint8_t tag = buffer[bufPos++];
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if (tag != 0xa2)
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goto exit_error;
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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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char vendorNameBuf[100];
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char modelNameBuf[100];
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char revisionBuf[100];
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char* vendorName = NULL;
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char* modelName = NULL;
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char* revision = NULL;
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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: /* vendorName */
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vendorName = StringUtils_createStringFromBufferInBuffer(vendorNameBuf, buffer + bufPos, length);
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bufPos += length;
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break;
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case 0x81: /* modelName */
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modelName = StringUtils_createStringFromBufferInBuffer(modelNameBuf, buffer + bufPos, length);
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bufPos += length;
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break;
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case 0x82: /* revision */
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revision = StringUtils_createStringFromBufferInBuffer(revisionBuf, buffer + bufPos, length);
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bufPos += length;
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break;
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case 0x83: /* list of abstract syntaxes */
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bufPos += length;
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break;
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default: /* ignore unknown tags */
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bufPos += length;
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break;
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}
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}
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handler(invokeId, parameter, MMS_ERROR_NONE, vendorName, modelName, revision);
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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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