NAME

  GEN_UnregParamType.seq - Generation of error cause Unrecognized Parameters

PURPOSE

  To check that if unrecognized parameter type is received with higher two bytes
  are set to 01, the endpoint should stop processing this parameter, do not
  process any further parameters within this chunk, and report the unrecognized
  parameter in an 'Unrecognized Parameter'.

SYNOPSIS

  ./GEN_UnregParamType.seq [-tooloption ...] -pkt ./GEN_UnregParamType.def
    -tooloption : v6eval tool option
  See Also: ../common/STD_PKT_COMMON.def
            ../common/SCTP_COMMON.def

PRE-TEST CONDITION

  Association is not established between endpoint A and B. Arrange the data
  in endpoint A such that INIT-ACK chunk is sent to endpoint B with unrecognized
  parameter type in which higher two bytes are set to 01.

TEST PROCEDURE

  Endpoint A                           Endpoint B                ULP
  (CLOSED)                             (CLOSED)

                                                   <-----    Associate
                <-----------------      INIT

  INIT-ACK      ----------------->
  (with unrecognized parameter type 0x7F00)
                <-----------------      COOKIE-ECHO

                <-----------------      ERROR
                                        (with Unrecognized Parameter type)
  COOKIE-ACK    ----------------->

  TEST DESCRIPTION:

  1. Attempt to initiate an association from endpoint A to B. Send INIT-ACK
     message with one optional parameter which is not defined in INIT-ACK.
     The highest order two bits in that parameter should be 01.
  2. Check A: That parameter is skipped and COOKIE-ECHO is received at 
     endpoint A.
  3. Check B: ERROR is received with Unrecognized parameter error cause at
     endpoint A.

NOTE

  None

REFERENCE

  RFC 4960

  3.3.10.8.  Unrecognized Parameters (8)

    Cause of error
    ---------------

    Unrecognized Parameters: This error cause is returned to the
    originator of the INIT ACK chunk if the receiver does not recognize
    one or more Optional TLV parameters in the INIT ACK chunk.

        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        |     Cause Code=8              |      Cause Length             |
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        /                  Unrecognized Parameters                      /
        \                                                               \
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

    Unrecognized Parameters: variable length

      The Unrecognized Parameters field contains the unrecognized
      parameters copied from the INIT ACK chunk complete with TLV.  This
      error cause is normally contained in an ERROR chunk bundled with
      the COOKIE ECHO chunk when responding to the INIT ACK, when the
      sender of the COOKIE ECHO chunk wishes to report unrecognized
      parameters.