EX_HdrProcessingOrder_HFD_M10 - Extension Header Processing Order
(Fragment Header precedes Destination Options Header,
Error from Fragment Header)
Host and Router
None
Verify that a node properly processes the headers of an IPv6 packet in the correct order.
TN NUT
| |
|-------------------------->|
| Test Packet |
| |
| |
|<--------------------------|
| ICMP Error |
| |
v v
1. TN transmits Test Packet, an Echo Request that has a Hop-by-Hop Options header,
Fragment header, and Destination Options header in that order.
The IPv6 header has a Payload Length that is not a multiple of 8 octets,
and the Fragment header has the M-bit set.
The Destination Options header has an unknown Option Type 135.
2. Observe the packets transmitted by the NUT.
Test Packet Data is:
IPv6 Header
Version = 6
Traffic Class = 0
FlowLabel = 0
PayloadLength = 37
NextHeader = 0 (Hop-by-Hop Options Header)
SourceAddress = TN Link Local Address
DestinationAddress = NUT Link Local Address
Hop-by-Hop Options Header
NextHeader = 44 (Fragment Header)
HeaderExtLength = 0
OptionType = 1 (PadN)
OptDataLength = 4
pad = {0, 0, 0, 0}
Fragment Header
NextHeader = 60 (Destination Header)
FragmentOffset = 0
MFlag = 1
FragmentID = 103
Destination Header
NextHeader = 58 (ICMPv6)
HeaderExtLength = 0
OptionType = 0x87 (unknown, msb:10)
OptDataLength = 4
data = {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}
PASS: The NUT should send an ICMPv6 Parameter Problem message to TN.
The Code field must be 0(erroneous header field encountered).
The Pointer field should be 0x04(offset of Payload Length field in the IPv6 header).
The NUT must discard the Echo Request from TN.
IPv6 Header
Version = 6
Traffic Class = 0
FlowLabel = 0
PayloadLength = 85
NextHeader = 58 (ICMPv6)
SourceAddress = Target Link Local Address
Destination Address = Tester Link Local Address
ICMP Error
Type = 4 (Parameter Problem)
Code = 0 (erroneous header field encountered)
Checksum = (auto)
Pointer = 4 (Payload Length field in IPv6 Header)
PayloadData = (Sent Packet)
Common Test Cleanup
perldoc V6evalTool