Diameter Maintenance and J. Bournelle Extensions (DIME) France Telecom R&D Internet-Draft G. Giaretta Intended status: Standards Track Qualcomm Expires: January 9, 2008 H. Tschofenig Nokia Siemens Networks M. Nakhjiri Huawei USA July 8, 2007 Diameter Mobile IPv6: Support for Home Agent to Diameter Server Interaction draft-ietf-dime-mip6-split-04.txt Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on January 9, 2008. Copyright Notice Copyright (C) The IETF Trust (2007). Abstract Mobile IPv6 deployments may want to bootstrap their operations dynamically based on an interaction between the Home Agent and the Bournelle, et al. Expires January 9, 2008 [Page 1] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 Diameter server of the Mobile Service Provider (MSP). This document specifies the interaction between a Mobile IP Home Agent and the Diameter server. Two different mechanisms for authentication of a MN to the HA are supported. The first method consists of performing the Internet Key Exchange v2 (IKEv2) protocol along with the Extensible Authentication Protocol (EAP) with the Diameter server, while the second method utilizes the Mobile IPv6 Authentication option, as defined in RFC 4285. For Internet Key Exchange v2 with EAP-based authentication, the Diameter Mobile IPv6 application, defined in this document, reuses the commands defined in the Diameter EAP application, while for supporting the RFC 4285-style MIPv6 Authentication Options, a new Diameter application and new command codes are defined. Bournelle, et al. Expires January 9, 2008 [Page 2] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Advertising Application Support . . . . . . . . . . . . . . . 5 4. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5. Protocol Description . . . . . . . . . . . . . . . . . . . . . 6 5.1. Support for Mobile IPv6 with IKEv2 and IPsec . . . . . . . 6 5.2. Support for the Mobile IPv6 Authentication Protocol . . . 8 5.3. Mobile IPv6 Session Management . . . . . . . . . . . . . . 9 5.3.1. Session-Termination-Request Command . . . . . . . . . 9 5.3.2. Session-Termination-Answer Command . . . . . . . . . . 9 5.3.3. Abort-Session-Request Command . . . . . . . . . . . . 9 5.3.4. Abort-Session-Answer Command . . . . . . . . . . . . . 10 5.4. Accounting for Mobile IPv6 services . . . . . . . . . . . 10 5.4.1. Accounting-Request Command . . . . . . . . . . . . . . 10 5.4.2. Accounting-Answer Command . . . . . . . . . . . . . . 11 6. Command-Code and AVP Values . . . . . . . . . . . . . . . . . 11 6.1. Command Code for EAP-based Authentication . . . . . . . . 11 6.1.1. Diameter-EAP-Request (DER) . . . . . . . . . . . . . . 12 6.1.2. Diameter-EAP-Answer (DEA) . . . . . . . . . . . . . . 12 6.2. Command Codes for RFC 4285 Support . . . . . . . . . . . . 13 6.2.1. MIP6-Request-Message . . . . . . . . . . . . . . . . . 13 6.2.2. MIP6-Answer-Message . . . . . . . . . . . . . . . . . 14 6.2.3. Diameter AVPs . . . . . . . . . . . . . . . . . . . . 15 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18 7.1. Command Codes . . . . . . . . . . . . . . . . . . . . . . 18 7.2. Result-Code AVP Values . . . . . . . . . . . . . . . . . . 18 7.3. Application Identifier . . . . . . . . . . . . . . . . . . 18 8. Security Considerations . . . . . . . . . . . . . . . . . . . 18 9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 18 10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 19 10.1. Normative References . . . . . . . . . . . . . . . . . . . 19 10.2. Informative References . . . . . . . . . . . . . . . . . . 20 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 20 Intellectual Property and Copyright Statements . . . . . . . . . . 22 Bournelle, et al. Expires January 9, 2008 [Page 3] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 1. Introduction Performing the Mobile IPv6 protocol [1], requires the Mobile Node (MN) to own a Home Address (HoA) and assignment of a Home Agent (HA) to MN. The MN needs to register its Mobile IPv6 session with the HA in order facilitate its reachability and mobility, when away from home. The registration process itself requires establishment of IPsec security associations (SA) and cryptographic material between the MN and HA. Providing the collection of home address, HA address and keying material to establish the IP SA is generaally referred to as the Mobile IPv6 bootstrapping problem [reference to RFC4640]. The purpose of this specification is to provide Diameter support for such bootstrapping in a split scenario [2] in a manner that satisfies the requirements defined in [13]. From an operator (mobility service provider, MSP) perspective, it is important to verify that the MN is authenticated and authorized to utilize Mobile IPv6 service and that such services are accounted for. Only when the MN is authenticated and authorized, the MSP allows the boostrapping of Mobile IPv6 parameters at the MN and HA. Thus, prior to processing the Mobile IPv6 service requests, the HA, participates in the authentication of the MN to verify the MN's identity. The HA also participates in the Mobile IPv6 authorization process involving the Diameter infrastrucure. The HA due to its role in traffic forwarding, also performs accounting for the Mobile IPv6 service provided to the MN. Mobile IPv6 specifications allow two different methods for MN authentication, one based on IKEv2 and EAP [3], and another based on the Mobile IPv6 Authentication Option [4]. The goal of this document is to specify the Diameter procedures associated with the Mobile IPv6 bootstrapping between the HA and the Diameter server for these two Mobile IP authentication approaches. For that reason the Diameter Mobile IPv6 application provides two different sets of commands. The first set of commands reuse the command already define in Diameter EAP application (though using the Diameter Mobile IPv6 Application-Id), while the second set of commands are new for Diameter and provide support the Mobile IPv6 Authentication Option, defined in RFC 4285. For authorization signaling and management of Mobile IPv6 session for the MN, this specification will use the existing procedures from base Diameter specification [5]. For accounting of Mobile IPv6 services provided to the MN, this specification uses the accounting application defined in [5]. Bournelle, et al. Expires January 9, 2008 [Page 4] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 2. Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [6]. The MIPv6 bootstrapping terminology is taken from [7]. 3. Advertising Application Support Diameter nodes conforming to this specification MUST advertise support by including the Diameter Mobile IPv6 Application ID value of [TO BE ASSIGNED BY IANA] in the Auth-Application-Id AVP of the Capabilities-Exchange-Request and Capabilities-Exchange-Answer command [5]. The Acct-Application-id AVP needs to include the Diameter Base Accounting Application ID value of 3 (to support the split accounting model [draft-ietf-dime-app-design-guide]). 4. Overview One task of the Mobile IPv6 bootstrapping procedure is to assign an appropriate HA to the MN. Furthermore, authorization and successful delivery of Mobile IPv6 to a MN through a HA, requires the HA to act as a client to the Diameter infrastructure interconnecting it to the MSP. As a Diameter client, the HA needs to perform the following operations: Authentication: Asserting or helping in assertion of the correctness of the MN identity. As a Diameter client supporting the new Diameter Mobile IPv6 application, the HA may need to support two different types of authentication by supporting the different command sets that are required for each authentication method. Authorization: The HA must verify that the user is authorized to use the Mobile IPv6 service using the assistance of the MSP Diameter servers. This is accomplised through use of new Diameter commands specifically designed for performing Mobile IPv6 authorization decisions. This document defines these commands and requires the HA to support use of these authorization commands and to participate in this authorization signaling. Accounting: For billing purposes and capacity planning, it is required of the HA to provide accounting report to the Diameter infrastructure and thus to support the related Diameter accounting procedures. Bournelle, et al. Expires January 9, 2008 [Page 5] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 Figure 1 depicts the architecture. +---------------------------+ +-----------------+ |Visited MSP | | Home MSP/MSA | | | | | | | | | | +--------+ | | +--------+ | | |Local | Diameter | | |Home | | | |Diameter|<---------------------->|Diameter| | | |Proxy | | | |Server | | | +--------+ | | +--------+ | | ^ | | ^ | | | | | | | | | Diameter | |Diameter| | | v | | v | | +-------+ | | +-------+ | | |Home | | | |Home | | | |Agent | | | |Agent | | | +-------+ | | +-------+ | | ^ | | ^ | +-----|---------------------+ +--------|--------+ | | | | | +---------+ | | | Mobile | | +--------->| Node |<-----------+ IKEv2 or RFC 4285 +---------+ IKEv2 or RFC 4285 Figure 1: Architecture Overview [Editor's Note: A description of the relationship with the front-end protocols is needed.] 5. Protocol Description 5.1. Support for Mobile IPv6 with IKEv2 and IPsec The use of IKEv2 between the MN and the HA allows the HA to authenticate the MN. When EAP is used with IKEv2, the Diameter EAP application, as defined in [8], is re-used. AVPs specific to Mobile IPv6 bootstrapping are added to this command. Figure 2 shows the message flow involved during the authentication phase when EAP is used. Bournelle, et al. Expires January 9, 2008 [Page 6] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 Mobile Home Diameter Node Agent Server ------ ----- -------- IKE_SA_INIT (1,2) <------------------------------> HDR, SK{IDi,[CERTREQ,] [IDr,] [CP(CFG_REQUEST),] SAi2, TSi, TSr} (3) -------------------------------> DER (EAP-Response) (4) ------------------------> DEA (EAP-Request) (5) <------------------------ HDR, SK {IDr, [CERT,] AUTH, EAP } <------------------------------- HDR, SK {EAP} --------------------------------> DER (EAP-Response) ------------------------> DEA (EAP-Request) <------------------------ HDR, SK{EAP-Request} <------------------------------- HDR, SK{EAP-Response} --------------------------------> DER (EAP-Response) ------------------------> ... ... DEA (EAP-Success) <------------------------ HDR, SK{EAP-Success} <------------------------------- HDR, SK{AUTH} -------------------------------> HDR, SK {AUTH, [CP(CFG_REPLY,] SAr2, TSi, TSr } <------------------------------- Figure 2: IKEv2 Diameter EAP Message Flow The MN and the HA start the interaction with an IKE_SA_INIT exchange. In this phase cryptographic algorithms are negotiated, nonces and Diffie-Hellman parameters are exchanged. Message (3) starts the IKE_AUTH phase. This second phase authenticates the previous messages, exchanges identities and certificates and establishes the first CHILD_SA. It is used to mutually authenticate the MN (acting Bournelle, et al. Expires January 9, 2008 [Page 7] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 as an IKEv2 Initiator) and the HA (acting as an IKEv2 Responder). The identity of the user/MN is provided in the IDi field. The MN indicates its willingness to be authenticated via EAP by omitting the AUTH field in message 3 (see [9]). As part of the authentication process, the MN MAY request a Home- Address, a Home Prefix or suggests one, see [2], using a CFG_REQUEST payload in the message 3. The HA extracts the IDi field from the message 3 and sends a Diameter-EAP-Request (DER) message towards the authenticating Diameter server. This message is routed to the MNs Diameter server/EAP server. The Diameter server selects the EAP method and replies with the DEA Message. Depending on the type of EAP method chosen, a number of DER and DEA messages carry the method specific exchanges between the MN and the Diameter server/EAP server. At the end of the EAP authentication phase, the Diameter server indicates the result of the authentication in the Result-Code AVP and provides the corresponding EAP packet (EAP Success or EAP Failure). The last IKEv2 message sent by the HA contains the Home Address or the Home Prefix. In the latter case, a CREATE_CHILD_SA exchange is necessary to setup IPsec SAs for Mobile IPv6 signalling. In some deployment scenario, the HA may also acts as a IKEv2 Responder for IPsec VPN access. A problem in this case is that the IKEv2 responder may not know if IK Ev2 is used for MIP6 service or for IPsec VPN access. A network operator needs to be aware of this limitation. 5.2. Support for the Mobile IPv6 Authentication Protocol Figure 3 describes the sequence of messages sent and received between the MN, the HA and the Diameter server during the registration when RFC 4285 is used. Binding Update (BU) and Binding Acknowledgement (BA) messages are used in the registration process. This exchange triggers the Diameter interaction. According to [4] the MN uses the Mobile Node Identifier Option, specifically the MN-NAI mobility option as defined in [14] to identify itself while authenticating with the HA. The MN may use the Message Identifier option for additional replay protection. The authentication option may be used by the MN to transfer authentication data when the MN and the HA are utilizing a mobility SPI. Bournelle, et al. Expires January 9, 2008 [Page 8] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 The BU initiates a MIP6-Request-Message to the Diameter server and the corresponding response is carried in a MIP6-Answer-Message. Mobile Home AAA Node Agent Server | | | | | | | Binding Update |MIP6-Request-Message | (a)|------------------------------------>|-------------------->| | (including MN-ID option, | | | Message ID option [optional], | | | authentication option) | | | | | | | | | Binding Acknowledgement |MIP6-Answer-Message | (b)|<------------------------------------|<--------------------| | (including MN-ID option, | (MN-HA key) | | Message ID option [optional], | | | authentication option) | | Figure 3: MIPv6 Bootstrapping using RFC 4285 5.3. Mobile IPv6 Session Management The Diameter server may maintain state or may be stateless. This is indicated in the Auth-Session-State AVP (or its absence). The HA MUST support the Authorization Session State Machine defined in [5]. Moreover the following 4 commands may be exchanged between the HA and the Diameter server. 5.3.1. Session-Termination-Request Command The Session-Termination-Request (STR) message [5] is sent by the HA to inform the Diameter server that an authorized session is being terminated. 5.3.2. Session-Termination-Answer Command The Session-Termination-Answer (STA) message [5] is sent by the Diameter server to acknowledge the notification that the session has been terminated. 5.3.3. Abort-Session-Request Command The Abort-Session-Request (ASR) message [5] is sent by the Diameter server to terminates the session. This fulfills one of the requirement described in [13]. Bournelle, et al. Expires January 9, 2008 [Page 9] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 5.3.4. Abort-Session-Answer Command The Abort-Session-Answer (ASA) message [5] is sent by the Home Agent in response to an ASR message. 5.4. Accounting for Mobile IPv6 services The HA MUST be able act as a Diameter client collecting accounting records needed for service control and charging. The HA MUST support the accounting procedures (specifically the command codes mentioned below) and the Accounting Session State Machine as defined in [5]. The command codes, exchanged between the HA and Diameter server for accounting purposes, are provided in the following subsections. The Diameter application design guideline [15] defines two separate model for accounting: Split accounting model: According to this model, the accounting messages use the Diameter base accounting application ID (value of 3). Since accounting is treated as an independent application, accounting commands may be routed separately from the rest of application messages and thus the accounting messages generally end up in a central accounting server. Since Diameter Mobile IPv6 application does not define its own unique accounting commands, this is the prefered choice, since it permits use of centralized accounting for several applications. Coupled accounting model: In this model, the accounting messages will use the application ID of the Mobile IPv6 application. This means that accounting messages will be routed like any other Mobile IPv6 application messages. This requires the Diameter server in charge of Mobile IPv6 application to handle the accounting records (e.g., sends them to a proper accounting server).. As mentioned above, the prefered choice is to use the split accounting model and thus choose Diameter base accounting application ID (value of 3) for accounting messages. 5.4.1. Accounting-Request Command The Accounting-Request command [5] is sent by the HA to the Diameter server to exchange accounting information regarding the MN with the Diameter server. Bournelle, et al. Expires January 9, 2008 [Page 10] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 5.4.2. Accounting-Answer Command The Accounting-Answer command [5] is sent by the Diameter server to the HA to acknowledge receiving an Accounting-Request. 6. Command-Code and AVP Values The following commands are defined in this section: Command-Name Abbrev. Code Reference Application ---------------------------------------------------------------------- MIP6-Request-Message MRM XXX TBD MIP6 MIP6-Answer-Message MAM XXX TBD MIP6 Figure 4: New Command Codes The following defines the command codes used by the Diameter Mobile IPv6 application: Command-Name Abbrev. Code Reference Application ---------------------------------------------------------------------- Diameter-EAP-Request DER 268 RFC 4072 EAP Diameter-EAP-Answer DEA 268 RFC 4072 EAP MIP6-Request-Message MRM XXX TBD MIP6 MIP6-Answer-Message MAM XXX TBD MIP6 Session-Termination-Request STR 275 RFC 3588 BASE Session-Termination-Answer STA 275 RFC 3588 BASE Abort-Session-Request ASR 275 RFC 3588 BASE Abort-Session-Answer ASA 275 RFC 3588 BASE Accounting-Request ACR 271 RFC 3588 BASE Accounting-Answer ACA 271 RFC 3588 BASE Figure 5: Command Codes 6.1. Command Code for EAP-based Authentication This document re-uses the Diameter EAP application commands. The following commands are used to carry MIPv6 related bootstrapping AVPs: Bournelle, et al. Expires January 9, 2008 [Page 11] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 Command-Name Abbrev. Code Reference Application ------------------------------------------------------------------ Diameter-EAP-Request DER 268 RFC 4072 EAP Diameter-EAP-Answer DEA 268 RFC 4072 EAP Figure 6: Diameter EAP command codes used for MIPv6 Bootstrapping HA to HAAA Interface 6.1.1. Diameter-EAP-Request (DER) The Diameter-EAP-Request (DER) message [8], indicated by the Command- Code field set to 268 and the 'R' bit set in the Command Flags field, is sent by the HA to the Diameter server to initiate a Mobile IPv6 service authentication and authorization procedure. The DER message format is the same as defined in [8]. The Application-ID field of the Diameter Header MUST be set to the Diameter Mobile IPv6 Application ID [TO BE ASSIGNED TO IANA]. ::= < Diameter Header: 268, REQ, PXY > < Session-Id > { Auth-Application-Id } { Origin-Host } { Origin-Realm } { Destination-Realm } { Auth-Request-Type } [ Destination-Host ] [ NAS-Identifier ] [ NAS-IP-Address ] [ NAS-IPv6-Address ] [ NAS-Port-Type ] [ User-Name ] { EAP-Payload } [ MIP6-Feature-Vector ] [ MIP-Mobile-Node-Address ] ... * [ AVP ] 6.1.2. Diameter-EAP-Answer (DEA) The Diameter-EAP-Answer (DEA) message defined in [8], indicated by the Command-Code field set to 268 and 'R' bit cleared in the Command Flags field, is sent in response to the Diameter-EAP-Request message (DER). If the Mobile IPv6 authentication procedure was successful then the response MAY include any set of bootstrapping AVPs. Bournelle, et al. Expires January 9, 2008 [Page 12] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 The DEA message format is the same as defined in [8]. The Application-Id field in the Diameter header MUST be set to the Diameter Mobile IPv6 Application-Id [TO BE ASSIGNED BY IANA]. ::= < Diameter Header: 268, PXY > < Session-Id > { Auth-Application-Id } { Auth-Request-Type } { Result-Code } { Origin-Host } { Origin-Realm } [ User-Name ] { EAP-Payload } [ Authorization-Lifetime ] [ MIP-Mobile-Node-Address ] [ MIP6-Feature-Vector ] ... * [ AVP ] 6.2. Command Codes for RFC 4285 Support This section defines Command-Code [5] values that MUST be supported by all Diameter implementations conforming to this specification. The following Command Codes are defined in this specification. Command-Name Abbreviation Code Section ------------------------------------------------------------------ MIP6-Request-Message MRM TBD Section 6.2.1 MIP6-Answer-Message MAM TBD Section 6.2.2 6.2.1. MIP6-Request-Message The MIP6-Request-Message (MRM), indicated by the Command-Code field set to TBD and the 'R' bit set in the Command Flags field, is sent by the HA, acting as a Diameter client, in order to request the authentication and authorization of a MN. The HA uses information found in the Binding Update to construct the following AVPs, to be included as part of the MRM: o Home Address (MIP-Mobile-Node-Address AVP) o Mobile Node NAI (User-Name AVP [5]) Bournelle, et al. Expires January 9, 2008 [Page 13] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 o MN-AAA Authentication Extension (MIP-MN-AAA-Auth AVP) If the MN's home address is zero, the HA MUST NOT include a MIP- Mobile-Node-Address AVP. If the MN's home address is all ones, the HA MUST include a MIP- Mobile-Node-Address AVP, set to all ones. The message format is shown below: ::= < Diameter Header: XXX, REQ, PXY > < Session-ID > { Auth-Application-Id } { User-Name } { Destination-Realm } { Origin-Host } { Origin-Realm } [ Acct-Multi-Session-Id ] [ Destination-Host ] [ Origin-State-Id ] [ NAS-Identifier ] [ NAS-IP-Address ] [ NAS-IPv6-Address ] [NAS-Port-Type] [ MIP6-Feature-Vector ] [ MIP-MN-AAA-Auth ] [ MIP-Mobile-Node-Address ] [ Authorization-Lifetime ] [ Auth-Session-State ] * [ Proxy-Info ] * [ Route-Record ] * [ AVP ] 6.2.2. MIP6-Answer-Message The MIP6-Answer-Message (MAM) message, indicated by the Command-Code field set to TBD and the 'R' bit cleared in the Command Flags field, is sent by the Diameter server in response to the MIP6-Request- Message message. The User-Name MAY be included in the MAM if it is present in the MRM. The Result-Code AVP MAY contain one of the values defined in Section 6.2.3.2, in addition to the values defined in RFC 3588 [5]. An MAM message with the Result-Code AVP set to DIAMETER_SUCCESS MUST include the MIP-Mobile-Node-Address AVP. The MIP-Home-Agent-Address Bournelle, et al. Expires January 9, 2008 [Page 14] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 AVP contains the HA assigned to the MN, while the MIP-Mobile-Node- Address AVP contains the home address that was assigned. The message format is shown below: ::= < Diameter Header: XXX, PXY > < Session-Id > { Auth-Application-Id } { Result-Code } { Origin-Host } { Origin-Realm } [ Acct-Multi-Session-Id ] [ User-Name ] [ Authorization-Lifetime ] [ Auth-Session-State ] [ Error-Message ] [ Error-Reporting-Host ] [ Re-Auth-Request-Type ] [ MIP6-Feature-Vector ] [ MIP-MN-to-HA-MSA ] [ MIP-HA-to-MN-MSA ] [ MIP-MSA-Lifetime ] [ MIP-Session-Key] [ MIP-Mobile-Node-Address ] * [ MIP-Filter-Rule ] [ Origin-State-Id ] * [ Proxy-Info ] * [ AVP ] [Editor's Note: The MIP-Filter-Rule is based on IPFiltrRule, which is currently being revised. Hence, this document should refer to the updated functionality. Furthermore, the requirements document indicates that QoS parameters may need to conveyed to the HA. Hence, the revised version of the QoS-Filter-Rule / QoSFilterRule being developed with [10] has to be used.] 6.2.3. Diameter AVPs The Diameter client uses AVPs dependent on the usage of RFC 4285 [4] or RFC 4877 [3]. To provide support for RFC 4285 [4] the following AVPs defined in [11] are reused in this application: Bournelle, et al. Expires January 9, 2008 [Page 15] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 o MIP-HA-to-MN-MSA AVP, o MIP-MN-to-HA-MSA AVP, o MIP-Session-Key AVP o MIP-Algorithm-Type AVP o MIP-Replay-Mode AVP o MIP-MN-AAA-Auth AVP o MIP-MN-AAA-SPI AVP o MIP-Auth-Input-Data-Length AVP o MIP-Authenticator-Length AVP o MIP-Authenticator-Offset AVP o MIP-MSA-Lifetime AVP o MIP-Mobile-Node-Address (with an IPv6 address) 6.2.3.1. Accounting AVPs This document reuses the accounting AVPs defined in Diameter Mobile IPv4 application [11], namely: Accounting-Input-Octets: Number of octets in IP packets received from the user Accounting-Output-Octets: Number of octets in IP packets sent by the user Accounting-Input-Packets: Number of IP packets received from the user Accounting-Output-Packets: Number of IP packets sent by the user. 6.2.3.2. Result-Code AVPs This section defines new Result-Code [5] values that MUST be supported by all Diameter implementations that conform to this specification. [Editor's Note: This section needs to list the result codes that are used by this application.] 6.2.3.3. AVP Occurence Tables The following table describes the Diameter AVPs defined by this document; their AVP Code values, types, and possible flag values; and whether the AVP MAY be encrypted. Bournelle, et al. Expires January 9, 2008 [Page 16] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 6.2.3.3.1. Support for Mobile IPv6 with IKEv2 and IPsec +--------------------------+ | AVP Flag rules | +----+-----+----+-----+----+ AVP Defined | | |SHLD| MUST|MAY | Attribute Name Code in Value Type |MUST| MAY | NOT| NOT|Encr| +-----------------------------------------+----+-----+----+-----+----+ |MIP-Mobile- | | | | | | |Node-Address 334 RFC4004 Address | M | P | | V | Y | +-----------------------------------------+----+-----+----+-----+----+ |MIP6-Feature- | | | | | | |Vector TBD 4.7.4 Unsigned64 | | P | | M,V | Y | +-----------------------------------------+----+-----+----+-----+----+ The MIP6-Feature-Vector is defined in Section 4.7.4 of [12]. 6.2.3.3.2. Support for the Mobile IPv6 Authentication Protocol +--------------------------+ | AVP Flag rules | +----+-----+----+-----+----+ AVP Section | | |SHLD| MUST|MAY | Attribute Name Code Defined Value Type |MUST| MAY | NOT| NOT|Encr| +-----------------------------------------+----+-----+----+-----+----+ |MIP-MN-AAA-Auth 322 RFC4004 Grouped | M | P | | V | Y | +-----------------------------------------+----+-----+----+-----+----+ |MIP-Auth-Input- 338 RFC4004 Unsigned32 | M | P | | V | Y | | Data-Length | | | | | | +-----------------------------------------+----+-----+----+-----+----+ |MIP- 339 RFC4004 Unsigned32 | M | P | | V | Y | | Authenticator-Length | | | | | | +-----------------------------------------+----+-----+----+-----+----+ |MIP- 340 RFC4004 Unsigned32 | M | P | | V | Y | | Authenticator-Offset | | | | | | +-----------------------------------------+----+-----+----+-----+----+ |MIP-MN-AAA-SPI 341 RFC4004 Unsigned32 | M | P | | V | Y | +-----------------------------------------+----+-----+----+-----+----+ |MIP-Mobile- RFC4004 Address | | | | | | |Node-Address 333 7.3 | M | P | | V | Y | +-----------------------------------------+----+-----+----+-----+----+ |MIP6-Feature- | | | | | | |Vector TBD 4.7.4 Unsigned64 | | P | | M,V | Y | +-----------------------------------------+----+-----+----+-----+----+ The MIP6-Feature-Vector is defined in Section 4.7.4 of [12]. Bournelle, et al. Expires January 9, 2008 [Page 17] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 7. IANA Considerations This section contains the namespaces that have either been created in this specification or had their values assigned to existing namespaces managed by IANA. 7.1. Command Codes This specification reuses the values 260 and 262 from the Command Code namespace defined in [5]. See Section 6 for the assignment of the namespace in this specification. 7.2. Result-Code AVP Values This specification assigns the values TBD - TBD from the Result-Code AVP (AVP Code 268) value namespace defined in [5]. See Section 6.2.3.2 for the assignment of the namespace in this specification. 7.3. Application Identifier This specification uses the value TBD to the Application Identifier namespace defined in [5]. 8. Security Considerations The security considerations for the Diameter interaction required to accomplish the split scenario are described in in [2]. Additionally, the security considerations of the Diameter Base protocol [5], Diameter EAP application [8] are applicable to this document. This document does not introduce new security vulnerabilities. 9. Acknowledgements The authors would like to thanks Jari Arkko, Tolga Asversen, Pasi Eronen, Santiago Zapata Hernandez, Jouni Korhonen, Anders Kristensen, Avi Lior, John Loughney, Ahmad Muhanna and Lionel Morand and Yoshihiro Ohba for all the useful discussions. Jouni Korhonen provided a detailed draft review in June 2007. Hannes Tschofenig would like to thank the European Commission support in the co-funding of the ENABLE project, where this work is partly being developed. Julien Bournelle would like to thank GET/INT since he began this work while he was under their employ. Bournelle, et al. Expires January 9, 2008 [Page 18] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 10. References 10.1. Normative References [1] Johnson, D., Perkins, C., and J. Arkko, "Mobility Support in IPv6", RFC 3775, June 2004. [2] Giaretta, G., "Mobile IPv6 bootstrapping in split scenario", draft-ietf-mip6-bootstrapping-split-05 (work in progress), May 2007. [3] Devarapalli, V. and F. Dupont, "Mobile IPv6 Operation with IKEv2 and the Revised IPsec Architecture", RFC 4877, April 2007. [4] Patel, A., Leung, K., Khalil, M., Akhtar, H., and K. Chowdhury, "Authentication Protocol for Mobile IPv6", RFC 4285, January 2006. [5] Calhoun, P., Loughney, J., Guttman, E., Zorn, G., and J. Arkko, "Diameter Base Protocol", RFC 3588, September 2003. [6] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [7] Patel, A. and G. Giaretta, "Problem Statement for bootstrapping Mobile IPv6 (MIPv6)", RFC 4640, September 2006. [8] Eronen, P., Hiller, T., and G. Zorn, "Diameter Extensible Authentication Protocol (EAP) Application", RFC 4072, August 2005. [9] Kaufman, C., "Internet Key Exchange (IKEv2) Protocol", RFC 4306, December 2005. [10] Korhonen, J., "Quality of Service Attributes for Diameter and RADIUS", draft-ietf-dime-qos-attributes-00 (work in progress), July 2007. [11] Calhoun, P., Johansson, T., Perkins, C., Hiller, T., and P. McCann, "Diameter Mobile IPv4 Application", RFC 4004, August 2005. [12] Korhonen, J., "Diameter Mobile IPv6: Support for Network Access Server to Diameter Server Interaction", draft-ietf-dime-mip6-integrated-04 (work in progress), May 2007. Bournelle, et al. Expires January 9, 2008 [Page 19] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 10.2. Informative References [13] Giaretta, G., "AAA Goals for Mobile IPv6", draft-ietf-mip6-aaa-ha-goals-03 (work in progress), September 2006. [14] Patel, A., Leung, K., Khalil, M., Akhtar, H., and K. Chowdhury, "Mobile Node Identifier Option for Mobile IPv6 (MIPv6)", RFC 4283, November 2005. [15] Fajardo, V., "Diameter Applications Design Guidelines", draft-ietf-dime-app-design-guide-01 (work in progress), June 2007. [16] Hakala, H., Mattila, L., Koskinen, J-P., Stura, M., and J. Loughney, "Diameter Credit-Control Application", RFC 4006, August 2005. [17] Chowdhury, K. and A. Yegin, "MIP6-bootstrapping for the Integrated Scenario", draft-ietf-mip6-bootstrapping-integrated-dhc-04 (work in progress), June 2007. Authors' Addresses Julien Bournelle France Telecom R&D 38-4O rue du general Leclerc Issy-Les-Moulineaux 92794 France Email: julien.bournelle@orange-ftgroup.com Gerardo Giaretta Qualcomm Email: gerardo.giaretta@gmail.com Bournelle, et al. Expires January 9, 2008 [Page 20] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 Hannes Tschofenig Nokia Siemens Networks Otto-Hahn-Ring 6 Munich, Bavaria 81739 Germany Email: Hannes.Tschofenig@nsn.com URI: http://www.tschofenig.com Madjid Nakhjiri Huawei USA USA Email: mnakhjiri@huawei.com Bournelle, et al. Expires January 9, 2008 [Page 21] Internet-Draft Diameter MIP6: HA-to-AAAH Support July 2007 Full Copyright Statement Copyright (C) The IETF Trust (2007). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 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