NAME

    FH_Overlap - Fragment packets with Overlap data

TARGET

    Host and Router

SYNOPSIS

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

INITIALIZATION

    1. Check Link0 Link Local address Reachability
    2. Check support of Fragment Header

TEST PROCEDURE

    1. Send broken 1st fragment packet
    2. Send 2nd fragment packet
    2. Wait 5 sec.
    3. Send Echo Request
    4. If NS received then send NA, and wait Echo Reply again
    5. Receive Echo Reply

        +----------------+
        |      IPv6      |
        |     Header     |
        +----------------+    +----------------+
        |     ICMPv6     |    |  header with   |
        |      Echo      |    |    768 byte    |
        |    Request     |    |    payload     |
        |                |    |                |
        |                |    |                |
    ....|................|....|................|....+----------------+....
        |                |    |                |    |                |
        |  header with   |    |                |    |  512 byte of   |
        |   1024 byte    |    +----------------+    |    payload     |
        |    payload     |                          |                |
        |                |                          |                |
        +----------------+                          +----------------+

        [Original packet]     [1st frag. data]      [2nd frag. data]

    1st fragment packet is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 784
            NextHeader         = 44 (Fragment Header)
            HopLimit           = 64
            SourceAddress      = Tester Link Local Address
            DestinationAddress = Target Link Local Address

        Fragment Header
            NextHeader         = 58 (ICMPv6)
            Reserved1          = 0
            FragmentOffset     = 0
            Reserved2          = 0
            MFlag              = 1
            Identification     = (generated by current system time)

        Payload
            data = substr(_PACKET_IPV6_NAME(echo_request), 40, 776)

    2nd fragment packet is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 520
            NextHeader         = 44 (Fragment Header)
            HopLimit           = 64
            SourceAddress      = Tester Link Local Address
            DestinationAddress = Target Link Local Address

        Fragment Header
            NextHeader         = 58 (ICMPv6)
            Reserved1          = 0
            FragmentOffset     = 65
            Reserved2          = 0
            MFlag              = 0
            Identification     = (same as 1st fragment packet)

        Payload
            data               = substr(_PACKET_IPV6_NAME(echo_request), 560, 512)

JUDGMENT

    PASS : echo reply packet received.
    FAIL : don't received echo reply packet.

SEE ALSO

    perldoc V6evalTool