Module rasn_snmp::v3

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Version 3 Message Format (RFCs 3412, 3414)

SNMPv3 defines a message format that encapsulates the PDU format of v2 with extensions for the v3 security model.

  • RFC 3412: Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)
  • RFC 3414: User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)
  • RFC 3416: Version 2 of the Protocol Operations for the Simple Network Management Protocol (SNMP)



  • Administrative data about a Message.
  • The SNMPv3 message format, corresponding to the SNMP version 3 Message Processing Model.
  • Contains information to identify an administratively unique context and a PDU.
  • The security parameters encoding for User-based Security Model.


  • Represents either the plain text ScopedPdu if the privFlag in Message::flags is zero, or it represents an encrypted PDU (encoded as an OCTET STRING) which MUST be decrypted by the security model in use to produce a plaintext ScopedPdu.