CN-2-6-4 - Receiving BU with invalid Address - Source 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
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| | | | |<------| 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
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| |<------------------------------| 10.CoT
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| |<--------------|<--------------| 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, Source Address=Multicast address)
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| | | | | | (*1)
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|-------------------------------------->| 19.BU(No Home Address option, Source Address=Link local address)
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| | | | | | (*2)
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|-------------------------------------->| 20.BU(No Home Address option, Source Address=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, Source Address=Multicast address). *Expire BA timer. 19. Send Binding Update(No Home Address option, Source Address=Link local address). *Expire BA timer. 20. Send Binding Update(No Home Address option, Source Address=Invalid fp). *Expire BA timer. 21. Send ICMP Echo Request. 22. Receive ICMP Echo Reply(Type2 Routing Header).
Packet Format 18. Binding Update(No Home Address option) 19. Binding Update(No Home Address option) 20. Binding Update(No Home Address 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)
9.5.1 Receiving Binding Updates
Before accepting a Binding Update, the receiving node MUST validate the Binding Update according to the following tests:
o The packet MUST contain a unicast routable home address, either in
the Home Address option or in the Source Address, if the Home
Address option is not present.
(snip)
For packets carrying Binding Updates that fail to satisfy all of these tests for any reason other than insufficiency of the Sequence Number, registration type change, or expired nonce index values, they MUST be silently discarded.