DIAMETER_MESSAGE_T

Last published : Oct 30, 2026
Define common operations for Diameter.Req or Diameter.Res.
This topic lists the expressions that are provided by this class.
  • ACCOUNTING_SUB_SESSION_ID
    Returns the Accounting-Sub-Session-Id AVP (code 287) from the message.
Returns: avp_t
  • ACCT_APPLICATION_ID
    Returns the Acct-Application-Id AVP (code 259) from the message. Note: expression can be used to retrieve the value as Unsigned32
Returns: avp_unum_t
  • ACCT_MULTI_SESSION_ID
    Returns the Acct-Multi-Session-Id AVP (code 50) from the message.
Returns: avp_t
  • ACCT_SESSION_ID
    Returns the Acct-Session-ID AVP (code 44) from the message.
Returns: avp_t
  • APPLICATION_ID
    Returns the Application-ID from the message.
Returns: unum_text_t
  • AUTH_APPLICATION_ID
    Returns the Auth-Application-Id AVP (code 258) from the message. Note: expression can be used to retrieve the value as Unsigned32
Returns: avp_unum_t
  • AVP_END
    Returns the location at the end of Diameter message (or in other words end of all AVPs) in Diameter message.
Returns: text_t
  • AVP_LIST
    Returns the AVP region in Diameter message (or in other words returns location at start of AVPs and length equal to Diameter message length excluding header).
Returns: text_t
AVP (uint avpcode)
Returns the specified AVP from the message.
For example, to get the AVP with code 263 from a Request, use the expression: DIAMETER.REQ.AVP(263).
Note: To get AVP that is nested inside a grouped AVP, use the AVP method from the avp_t class.
Parameters (expressions not allowed):
            avpcode- AVP code
Returns: avp_t
AVP (uint avpcode, uint vendorid)
Returns the specified AVP in given vendor-id namespace from the message.
For example, to get the AVP with code 1001 and VendorId 10415 from a Request, use the expression: DIAMETER.REQ.AVP(1001, 10415).
Note: To get AVP that is nested inside a grouped AVP, use the AVP method from the avp_t class.
Parameters (expressions not allowed):
            avpcode- AVP code
            vendorid- Vendor Id
Returns: avp_t
  • AVP_START
    Returns the location at the start of AVPs (or in other words end of diameter header) in Diameter message.
Returns: text_t
  • COMMAND_CODE
    Returns the Command Code from the message.
Returns: unum_text_t
  • END_TO_END_ID
    Returns the End-to-End Identifier from the message.
Returns: unsigned_long_at
  • FLAGS
    Returns the value of Diameter Header flags in Diameter message.
Returns: diameter_flag_t
  • HOP_BY_HOP_ID
    Returns the Hop-by-Hop Identifier from the message.
Returns: unsigned_long_at
  • IS_PROXIABLE
    Returns true if the P (proxiable) command flag is set for the message.
Returns: bool_at
  • LENGTH
    Returns the Message Length from the message.
Returns: num_at
  • ORIGIN_HOST
    Returns the Origin-Host AVP (code 264) from the message.
Returns: avp_t
  • ORIGIN_REALM
    Returns the Origin-Realm AVP (code 296) from the message.
Returns: avp_t
  • PRODUCT_NAME
    Returns the Product-Name AVP (code 269) from the message.
Returns: avp_t
  • SESSION_ID
    Returns the Session-ID AVP (code 263) from the message.
Returns: avp_t
  • SUPPORTED_VENDOR_ID
    Returns the Supported-Vendor-Id AVP (code 265) from the message.
Returns: avp_t
  • USER_NAME
    Returns the User-Name AVP (code 1) from the message.
Returns: avp_t
  • VENDOR_ID
    Returns the Vendor-Id AVP (code 266) from the message.
Returns: avp_t
  • VENDOR_SPECIFIC_APPLICATION_ID
    Returns the Vendor-Specific-Application-Id AVP (code 260) from the message.
Returns: vendor_spec_appid_avp_t
  • VERSION
    Returns the version of the Diameter protocol. Currently, Diameter supports only version 1.
Returns: unum_text_t