NAME

  DO_PadN - Options Processing, Destination Options Header (PadN Option)

TARGET

  Host and Router

SYNOPSIS

  DO_PadN.seq [-tooloption ...] -pkt DO_PadN.def
    -tooloption : v6eval tool option

INITIALIZATION

  None

TEST PROCEDURE

Verify that a node properly processes bot known and unknown options, and acts in accordance with the highest order two bits of the option.

   TN                          NUT
    |                           |
    |-------------------------->|
    |   Echo Request            |
    |                           |
    |                           |
    |<--------------------------|
    |   Echo Reply              |
    |                           |
    |                           |
    v                           v

  1. TN transmits an Echo Request that has a Destination Options header with a 4 byte PadN Options.
  2. Observe the packets transmitted by the NUT.

  Echo Request Data is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 16
            NextHeader         = 60 (Destination Options Header)
            SourceAddress      = TN Link Local Address
            DestinationAddress = NUT Link Local Address

        Destination Options Header
            NextHeader         = 58 (ICMPv6)
            HeaderExtLength    = 0
            OptionType         = 1 (PadN)
            OptDataLength      = 4
            pad                = {0, 0, 0, 0}

        ICMP Echo Request
            Type           = 128 (Echo Request)
            Code           = 0
            Checksum       = (auto)
            Identifier     = 0xffff
            SequenceNumber = 1
            PayloadData    = {1, 2, 3, 4, 5, 6, 7, 8}

JUDGEMENT

  PASS: The NUT must send an Echo Reply to TN.

        IPv6 Header
            Version             = 6
            Traffic Class       = 0
            FlowLabel           = 0
            PayloadLength       = 16
            NextHeader          = 58 (ICMPv6)
            SourceAddress       = NUT Link Local Address
            Destination Address = TN Link Local Address

        ICMP Echo Reply
            Type           = 129 (Echo Reply)
            Code           = 0
            Checksum       = (auto)
            Identifier     = 0xffff (same as Echo Request)
            SequenceNumber = 1 (same as Echo Request)
            PayloadData    = {1, 2, 3, 4, 5, 6, 7, 8} (same as Echo Request)

CLEANUP

Common Test Cleanup

REFERENCE

RFC 8200 - IPv6 Specification