26 lines
803 B
Python
26 lines
803 B
Python
#
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# This file is part of pysnmp software.
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#
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# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
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# License: http://pysnmp.sf.net/license.html
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#
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from pyasn1.type import univ
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from pyasn1.codec.ber import decoder, eoo
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from pyasn1.error import PyAsn1Error
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from pysnmp.proto.error import ProtocolError
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def decodeMessageVersion(wholeMsg):
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try:
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seq, wholeMsg = decoder.decode(
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wholeMsg, asn1Spec=univ.Sequence(), recursiveFlag=0
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)
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ver, wholeMsg = decoder.decode(
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wholeMsg, asn1Spec=univ.Integer(), recursiveFlag=0
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)
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if eoo.endOfOctets.isSameTypeWith(ver):
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raise ProtocolError('EOO at SNMP version component')
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return ver
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except PyAsn1Error:
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raise ProtocolError('Invalid BER at SNMP version component')
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