NAME

CN-2-3-6 - Receiving BU - Invalid Mobility Header Checksum

TARGET

Host

TOPOLOGY

       HA----------R2----------R1----------R0
       |           |           |           |
       |           |           |           |
       |----       |----       |----MN     |----CN(NUT)
       |           |           |           |
       |           |           |           |
   Home Link     Link2       Link1       Link0
               (Foreign)   (Foreign)

Link0	3ffe:501:ffff:100::/64
Link1	3ffe:501:ffff:101::/64	Foreign Link
Link2	3ffe:501:ffff:102::/64	Foreign Link 2
Home Link	3ffe:501:ffff:104::/64	Home Link
CN(NUT)	3ffe:501:ffff:100::X Auto Configuration (InterfaceID)
MN(in Link1)	3ffe:501:ffff:101::Y Increased in each test (InterfaceID)	MN care-of address
MN(in Home Link)	3ffe:501:ffff:104::Y Increased in each test (InterfaceID)	MN home address
R0(Link0)	3ffe:501:ffff:100::1
R1(Link1)	3ffe:501:ffff:101::1
R2(Link2)	3ffe:501:ffff:102::1
HA(Home Link)	3ffe:501:ffff:104::1

INITIALIZATION

Reboot NUT (reboot.rmt)

TEST PROCEDURE

       MN      R1      HA      R0     CN(NUT) 
        |       |       |       |       |
        |       |       |       |------>| 1.RA
        |       |       |       |       |
        |       |       |       |------>| 2.NS
        |       |       |       |       |
        |       |       |       |<------| 3.NA
        |       |       |       |       |
        |-------------->|-------------->| 4.Echo Request
        |       |       |       |       |
        |<--------------|<--------------| 5.Echo Reply
        |       |       |       |       |
        |------------------------------>| 6.Echo Request(Home Address option)
        |       |       |       |       |
        |<------------------------------| 7.BE(Status=1)
        |       |       |       |       |
        |------------------------------>| 8.CoTI
        |       |       |       |       |
        |-------------->|-------------->| 9.HoTI
        |       |       |       |       |
        |<------------------------------| 10.CoT
        |       |       |       |       |
        |<--------------|<--------------| 11.HoT
        |       |       |       |       |
        |------------------------------>| 12.BU(Mobility Header Checksum = 0x0000)
        |       |       |       |       |
        |       |       |       |       | (*1)
        |       |       |       |       |
        |------------------------------>| 13.Echo Request(Home Address option)
        |       |       |       |       |
        |<------------------------------| 14.BE(Status=1) (*2)
        |       |       |       |       |

1. Send Router Advertisement.
2. Send Neighbor Solicitation.
3. Receive Neighbor Advertisement.
4. Send ICMP Echo Request.
5. Receive ICMP Echo Reply.
6. Send ICMP Echo Request(Home Address option).
7. Receive Binding Error(Status=1).
8. Send Care-of Test Init
9. Send Home Test Init
10. Receive Care-of Test.
11. Receive Home Test.
12. Send Binding Update(Mobility Header Checksum = 0x0000).
   *Expire BA timer.
13. Send ICMP Echo Request(Home Address option).
14. Receive Binding Error(Status=1).

Packet Format
12. Binding Update
13. ICMP_Echo Request(Home Address option)
14. Binding Error

JUDGEMENT

(*1) MN receives neither Binding Acknowledgement nor Binding Error.

(*2) MN receives Binding Error. (Binding Cache entry is not created.)
  - The Destination Address is set to the Source Address of ICMP Echo Request (MN care-of address).
  - The Status field is set to 1.

REFERENCE

(draft-ietf-mobileip-ipv6-24.txt)

9.2 Processing Mobility Headers

   Mobility Header processing MUST observe the following rules:

   o  The checksum must be verified as per Section 6.1.  Otherwise, the
      node MUST silently discard the message.