CN-2-6-5 - Receiving BU with invalid Address - Alternate Care-of Address (De-Registration)
Host
HA----------R2----------R1----------R0
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|----MN' |---- |----MN |----CN(NUT)
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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'(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
Reboot NUT (reboot.rmt)
MN' MN R1 HA R0 CN(NUT)
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| | | | |------>| 1.RA
| | | | | |
| | | | |------>| 2.NS
| | | | | |
| | | | |<------| 3.NA
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| |-------------->|-------------->| 4.Echo Request
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| |<--------------|<--------------| 5.Echo Reply
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| |------------------------------>| 6.Echo Request(Home Address option)
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| |<------------------------------| 7.BE(Status=1)
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| |------------------------------>| 8.CoTI
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| |-------------->|-------------->| 9.HoTI
| | | | | |
| |<------------------------------| 10.CoT
| | | | | |
| |<--------------|<--------------| 11.HoT
| | | | | |
| |------------------------------>| 12.BU
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| |<------------------------------| 13.BA
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| |------------------------------>| 14.Echo Request(Home Address option)
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| |<------------------------------| 15.Echo Reply(Type2 Routing Header)
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|-------------------------------------->| 16.HoTI
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|<--------------------------------------| 17.HoT
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|-------------------------------------->| 18.BU(No Home Address option, Alternate Care-of Addres=Multicust address)
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| | | | | | (*1)
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|-------------------------------------->| 19.BU(No Home Address option, Alternate Care-of Addres=Link local address)
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| | | | | | (*2)
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|-------------------------------------->| 20.BU(No Home Address option, Alternate Care-of Addres=Invalid fp)
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| | | | | | (*3)
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|-------------------------------------->| 21.Echo Request
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| |<------------------------------| 22.Echo Reply(Type2 Routing Header) (*4)
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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. 13. Receive Binding Acknowledgement. 14. Send ICMP Echo Request(Home Address option). 15. Receive ICMP Echo Reply(Type2 Routing Header). 16. Send Home Test Init 17. Receive Home Test. 18. Send Binding UpdateBU(No Home Address option, Alternate Care-of Addres=Multicust address). *Expire BA timer. 19. Send Binding Update(No Home Address option, Alternate Care-of Addres=Link local address). *Expire BA timer. 20. Send Binding Update(No Home Address option, Alternate Care-of Addres=Invalid fp). *Expire BA timer. 21. Send ICMP Echo Request. 22. Receive ICMP Echo Reply(Type2 Routing Header).
Packet Format
18.19.20. Binding Update(No Home Address option, Alternate Care-of Address option)
IPv6 header
Destination Options header
Home Address option
Mobility header
Binding Update
Alternate Care-of Address option
Nonce Indices option
Binding Authorization Data option
21. ICMP Echo Request
22. ICMP Echo Reply(Type2 Routing Header)
(*1) MN and MN' receives neither Binding Acknowledgement nor Binding Error.
(*2) MN and MN' receives neither Binding Acknowledgement nor Binding Error.
(*3) MN and MN' receives neither Binding Acknowledgement nor Binding Error.
(*4) MN receives ICMP Echo Reply. (Binding Cache entry is not deleted.) - The Destination Address is set to MN care-of address. - Type 2 Routing Header is included.
(draft-ietf-mobileip-ipv6-24.txt)
6.1.7 Binding Update Message
The care-of address is specified either by the Source Address field in the IPv6 header or by the Alternate Care-of Address option, if present. The care-of address MUST be a unicast routable address. IPv6 Source Address MUST be a topologically correct source address. Binding Updates for a care-of address which is not a unicast routable address MUST be silently discarded. Similarly, the Binding Update MUST be silently discarded if the care-of address appears as a home address in an existing Binding Cache entry, with its current location creating a circular reference back to the home address specified in the Binding Update (possibly through additional entries).