NAME

  InitAckWithZeroArwnd.seq - INIT-ACK chunk is received with advertised receiver window credit set to zero

PURPOSE

  To check that if INIT-ACK chunk is received with advertised receiver window
  credit set to zero, the endpoint should responded it with ABORT chunk
  including cause of invalid mandatory parameter.

SYNOPSIS

  ./InitAckWithZeroArwnd.seq [-tooloption ...] -pkt ./InitAckWithZeroArwnd.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 message with Advertised Receiver
  Window Credit set to zero is sent to endpoint B.

TEST PROCEDURE

  Endpoint A                           Endpoint B                ULP
  (CLOSED)                             (CLOSED)

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

  INIT-ACK      ----------------->
  (with AdvRecvWindow = 0)
                <-----------------      ABORT
                                        (Invalid Mandatory Parameter)

  TEST DESCRIPTION:

  1. Attempt to make an association from endpoint A to endpoint B. Send 
     INIT-ACK message with Advertised Receiver Window Credit set to zero.
     Record the message sequence using a signal emulator.
  2. Check A: INIT-ACK message is responded with ABORT including cause of 
     invalid mandatory parameter.

NOTE

  None

REFERENCE

  RFC 4960

  6.  User Data Transfer

    An SCTP receiver MUST be able to receive a minimum of 1500 bytes in
    one SCTP packet.  This means that an SCTP endpoint MUST NOT indicate
    less than 1500 bytes in its initial a_rwnd sent in the INIT or INIT
    ACK.