NAME

  OOTB_ShutdownAckChunk.seq - SHUTDOWN-ACK chunk is received from an address with which endpoint has no association

PURPOSE

  To check that if SHUTDOWN-ACK chunk is received from a destination address
  corresponding to which there is no association, the enpoint should responds
  it with SHUTDOWN-COMPLETE message.

SYNOPSIS

  ./OOTB_ShutdownAckChunk.seq [-tooloption ...] -pkt ./OOTB_ShutdownAckChunk.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 SHUTDOWN-ACK is sent to endpoint B.

TEST PROCEDURE

  Endpoint A                           Endpoint B                ULP
  (CLOSED)                             (CLOSED)

  SHUTDOWN-ACK ----------------->

               <-----------------       SHUTDOWN-COMPLETE

  TEST DESCRIPTION:

  1. Send SHUTDOWN-ACK message from endpoint A to endpoint B, when 
     there is no association between them. 
  2. Check A: SHUTDOWN-COMPLETE message will be sent.
  3. Check B: Verification tag in the SHUTDOWN-COMPLETE message will be 
     set equal to the verification tag in the received SHUTDOWN-ACK message. 
  4. Check C: T bit in the chunk flags is set to 1.
  5. Check D: State of endpoint B is not disturbed.

NOTE

  None

REFERENCE

  RFC 4960

  8.4.  Handle "Out of the Blue" Packets

    5)  If the packet contains a SHUTDOWN ACK chunk, the receiver should
        respond to the sender of the OOTB packet with a SHUTDOWN
        COMPLETE.  When sending the SHUTDOWN COMPLETE, the receiver of
        the OOTB packet must fill in the Verification Tag field of the
        outbound packet with the Verification Tag received in the
        SHUTDOWN ACK and set the T bit in the Chunk Flags to indicate
        that the Verification Tag is reflected.  Otherwise,