CN-5-2-8 - Lifetime - Binding Updates that fail to satisfy tests
Host
HA----------R2----------R1----------R0
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|---- |---- |----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(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 R1 HA R0 CN(NUT)
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| | | |------>| 1.RA
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| | | |------>| 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
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|------------------------------>| 12.BU(Lifetime=10,Sequence No=1)
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|<------------------------------| 13.BA(Status=0,Lifetime=10,Sequence No=1)
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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.BU(Lifetime=20,Sequence No=1)
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|<------------------------------| 17.BA(Status=135,Sequence No=1) (*1)
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|------------------------------>| 18.Echo Request(Home Address option)
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|<------------------------------| 19.Echo Reply(Type2 Routing Header)
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| | | | | Expire 40s
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|------------------------------>| 20.Echo Request(Home Address option)
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|<------------------------------| 21.BE(Status=1) (*2)
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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(Lifetime=10,Sequence No=1). 13. Receive Binding Acknowledgement(Status=0,Lifetime=10,Sequence No=1). 14. Send ICMP Echo Request(Home Address option). 15. Receive ICMP Echo Reply(Type2 Routing Header). 16. Send Binding Update(Lifetime=20,Sequence No=1). 17. Receive Binding Acknowledgement(Status=135,Sequence No=1). 18. Send ICMP Echo Request(Home Address option). 19. Receive ICMP Echo Reply(Type2 Routing Header). *Expire 40s 20. Send ICMP Echo Request(Home Address option). 21. Receive Binding Error(Status=1).
Packet Format 16. Binding Update 17. Binding Acknowledgement 18. ICMP_Echo Request(Home Address option) 19. ICMP Echo Reply(Type2 Routing Header) 20. ICMP_Echo Request(Home Address option) 21. Binding Error
(*1) MN receives Binding Acknowledgement. - The Destination Address is set to the Source Address of the Binding Update (MN care-of address 2). - The Status field is set to 135. - Type 2 Routing Header is included. - The Home Address field of Type 2 Routing Header is set to MN home address.
(*2) MN receives Binding Error. (The lifetime initialized by the first registration expires.) - The Destination Address is set to the Source Address of ICMP Echo Request (MN care-of address). - The Status field is set to 1.
(draft-ietf-mobileip-ipv6-24.txt)
9.5.2 Requests to Cache a Binding
In this case, the receiving node SHOULD create a new entry in its Binding Cache for this home address, or update its existing Binding Cache entry for this home address, if such an entry already exists. The lifetime for the Binding Cache entry is initialized from the Lifetime field specified in the Binding Update, although this lifetime MAY be reduced by the node caching the binding; the lifetime for the Binding Cache entry MUST NOT be greater than the Lifetime value specified in the Binding Update. Any Binding Cache entry MUST be deleted after the expiration of its lifetime.
6.1.8 Binding Acknowledgement Message
Lifetime
The granted lifetime, in time units of 4 seconds, for which this
node SHOULD retain the entry for this mobile node in its Binding
Cache.
9.5.1 Receiving Binding Updates
Before accepting a Binding Update, the receiving node MUST validate the Binding Update according to the following tests:
(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.