NAME

  FH_InvalidLength - check Fragment Reassembly (Invalid Length)

TARGET

  Host and Router

SYNOPSIS

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

INITIALIZATION

  1. Ping to Target (create Neighbor Cache Entries, if not exist)
  2. Override Neighbor Cache Entries

TEST PROCEDURE

  Tester                      Target
    |                           |
    |-------------------------->|
    |   Echo Request (1st)      |
    |                           |
    |                           |
    |-------------------------->|
    |   Echo Request (2nd)      |
    |                           |
    |                           |
    |<--------------------------|
    |   ICMP Error              |
    |                           |
    |                           |
    v                           v

  1. Send Echo Request (1st fragment)
  2. Send Echo Request (2nd fragment)
  3. Receive ICMP Error

  Echo Request (1st fragment) is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 527 (not multiple of 8 octets)
            NextHeader         = 56 (Fragment Header)
            SourceAddress      = Tester Link Local Address
            DestinationAddress = Target Link Local Address

        Fragment Header 
            NextHeader         = 58 (ICMP)
            FragmentOffset     = 0 (1st fragment)
            MFlag              = 1 (more fragment)

JUDGEMENT

  PASS: ICMP Error Received

        IPv6 Header
            Version             = 6
            Traffic Class       = 0
            FlowLabel           = 0
            PayloadLength       = 575
            NextHeader          = 58 (ICMP)
            SourceAddress       = Target Link Local Address
            Destination Address = Tester Link Local Address

        ICMP Error
            Type           = 4 (Parameter Problem)
            Code           = 0 (erroneous header field encounted)
            Checksum       = (auto)
            Pointer        = 4 (Pointer to Payload Length in IPv6 Header)
            PayloadData    = (1st Fragment of Echo Request)

SEE ALSO

  perldoc V6evalTool