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Overview of draft–16 for MIPv6

Overview of draft–16 for MIPv6. MIPv6 Design Team March 19 th , 2002. Basics. Submitted yesterday, not in I-D directories yet For the moment can be accessed at: http://www.piuha.net/~jarkko/publications/mipv6/ draft-ietf-mobileip-ipv6-pre16.txt (I-D format)

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Overview of draft–16 for MIPv6

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  1. Overview of draft–16 for MIPv6 MIPv6 Design Team March 19th, 2002

  2. Basics • Submitted yesterday, not in I-D directories yet • For the moment can be accessed at: http://www.piuha.net/~jarkko/publications/mipv6/ draft-ietf-mobileip-ipv6-pre16.txt (I-D format) mipv6-modified-parts-pre16.pdf (modified parts) • Modifications based on the security discussions and decisions • The document is in debt to various Internet Drafts that have been issued around this subject • Still needs some work (expect draft–17 soon)

  3. What’s new • Now securely usable on a global scale • Routing topology has changed • Due to HAO restrictions • Message sequences have changed • Due to RR, the new security mechanism • Signalling formats have changed • Due to desire to allow IPsec usage on MN-HA and tunneled RR signaling • Terminology has changed • Mainly due to formatting modifications, options => messages, sub-options => parameters, … • Many changed sections

  4. Still, it looks kind of familiar… • New messages added but old ones intact • Messages carried by new protocol instead of DO, but format still largely the same • Route Optimization and Bidirectional tunneling functionally intact

  5. Document modifications • 4.1. Overview • 4.x. New protocols • 4.4. Security Design (was authentication) • 5.1. Mobility Header (was BU, BA, BR) • 5.4. HAO • 5.x. Routing Header Type 2 • 7.2. Requirements for all IPv6 Nodes • 8. CN Behaviour • 9.x. Protecting RR packets • 10. MN Behaviour • X. Future Enhancements • 11. IANA Considerations • 13. Security Considerations • A.1. Modifications

  6. Overview of functionality • Return Routability procedure • Home Address Option processing • New role for Binding Request • Message Formats

  7. 2a. Home Test 1b. Care-of Test Init 1a. Home Test Init 2b. Care-of Test 3. Binding Update 4. Binding Ack RR messaging HA CN MN

  8. RR details and math 1a. HOTI: MN(HoA) -> CN: HoA 1b. COTI: MN(CoA) -> CN: CoA 2a. HOT: CN -> MN(HoA): K0, j 2b. COT: CN -> MN(CoA): K1, i 3. BU: MN(CoA) -> CN: HoA, CoA, MAC, j, i 4. BA: CN -> MN(CoA): MAC • CN is stateless until a good BU is received • K0 and K1 are cookies derived from a key known by CN • BU and BA MACs are based the cookies • The MACs are calculated over the messages • CN is assured that BU is from someone on path

  9. Bidir tunneling: no HAO Regular answer BCE exists: HAO Regular answer BCE expired: HAO Binding Missing Usage of HAO- and related messaging HA CN MN

  10. New role for Binding Request • Detection of mobile nodes may not be possible anymore for the CN! • Bidirectional tunneling hides the fact that the node is mobile • Binding Request in draft-16 has become a kind of a “Binding Refresh Request” • Responsibility for starting Route Optimisation on the MN side

  11. Mobility Header format . . . IPv6 header . . . +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Payload Proto | Header Len | MH Type | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | . . . Message Data . . . | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Messages carried in this format: • Binding Request • Home Test Init, Home Test, Care-of Test Init, Care-of Test • Binding Update, Binding Ack • Binding Missing

  12. Home Test message data +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Home Nonce Index | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | + + | Home Cookie (128 bits) | + + | | + + | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | . . . Parameters . . . | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  13. Binding Update message data +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |A|H|S|D| Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence # | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Lifetime | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | + + | | + Home Address (?) + | | + + | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | . Parameters . . . . (Mandatory carried parameters for CN Bus: Nonce Indices, . | Authentication Data) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  14. Nonce Indices parameter +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type = 4 | Len = 6 | Home Nonce Index | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Care-of Nonce Index | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  15. Authentication Data parameter +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 5 | 18 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SPI, always zero in draft-16 (?) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | + Authenticator + | | + (calculated from RR specific rules, different from draft–15) + | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  16. Summary • Main new things: RR, HAO, formats • Questions, comments? • Some open issues remain and will be discussed later

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