NAME

    FH_Overlap_UDP - UDP Fragment packets with Overlap data

TARGET

    Host and Router

SYNOPSIS

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

INITIALIZATION

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

TEST PROCEDURE

    1. Send 1st fragment packet
    2. Send broken 2nd fragment packet
    1. Send 2nd fragment packet
    2. Wait 5 sec.

        +----------------+
        |      IPv6      |
        |     Header     |
        +----------------+    +----------------+
        |   UDP Header   |    |   UDP Header   |
        +----------------+    +----------------+    +----------------+
        |0000000000000000|    |0000000000000000|    |1111111111111111|
        |0000000000000000|    |0000000000000000|    |1111111111111111|
        |0000000000000000|    |0000000000000000|    |1111111111111111|
        |0000000000000000|    +----------------+    |1111111111111111|
        |0000000000000000|                          |1111111111111111|
        |0000000000000000|                          |1111111111111111|
        |0000000000000000|                          |1111111111111111|
        +----------------+                          +----------------+

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

    1st fragment packet is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 528
            NextHeader         = 44 (Fragment Header)
            HopLimit           = 64
            SourceAddress      = Tester Link Local Address
            DestinationAddress = Target Link Local Address

        Fragment Header
            NextHeader         = 17 (UDP)
            Reserved1          = 0
            FragmentOffset     = 0
            Reserved2          = 0
            MFlag              = 1
            Identification     = (random)

        Payload
            data = substr(_PACKET_IPV6_NAME(udp_request), 40, 520)

    2nd fragment packet is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 1032
            NextHeader         = 44 (Fragment Header)
            HopLimit           = 64
            SourceAddress      = Tester Link Local Address
            DestinationAddress = Target Link Local Address

        Fragment Header
            NextHeader         = 17 (UDP)
            Reserved1          = 0
            FragmentOffset     = 1
            Reserved2          = 0
            MFlag              = 0
            Identification     = (same as 1st fragment packet)

        Payload
            data               = substr(_PACKET_IPV6_NAME(udp_request_1), 48, 1024)

JUDGMENT

    PASS : don't received UDP packet, or correct UDP packet received.
    FAIL : broken UDP packet received.

SEE ALSO

    perldoc V6evalTool