Linux Netlink as an Ip Services Protocol

By Salim, J.

Description
Technical Reference Publication

Excerpt
Introduction: The concept of IP Service control-forwarding separation was first introduced in the early 1990s by the BSD 4.4 routing sockets [9]. The focus at that time was a simple IP(v4) forwarding service and how the CPC, either via a command line configuration tool or a dynamic route daemon, could control forwarding tables for that IPv4 forwarding service. The IP world has evolved considerably since those days. Linux Netlink, when observed from a service provisioning and management point of view, takes routing sockets one step further by breaking the barrier of focus around IPv4 forwarding. Since the Linux 2.1 kernel, Netlink has been providing the IP service abstraction to a few services other than the classical RFC 1812 IPv4 forwarding.

Table of Contents
Table of Contents 1. Introduction ............................................... 2 1.1. Definitions ........................................... 3 1.1.1. Control Plane Components (CPCs)................ 3 1.1.2. Forwarding Engine Components (FECs)............ 3 1.1.3. IP Services ................................... 5 2. Netlink Architecture ....................................... 7 2.1. Netlink Logical Model ................................. 8 2.2. Message Format......................................... 9 2.3. Protocol Model......................................... 9 2.3.1. Service Addressing............................. 10 2.3.2. Netlink Message Header......................... 10 2.3.3. FE System Services' Templates.................. 13 3. Currently Defined Netlink IP Services....................... 16 3.1. IP Service NETLINK_ROUTE............................... 16 3.1.1. Network Route Service Module................... 16 3.1.2. Neighbor Setup Service Module.................. 20 3.1.3. Traffic Control Service........................ 21 3.2. IP Service NETLINK_FIREWALL............................ 23 3.3. IP Service NETLINK_ARPD................................ 27 4. References.................................................. 27 4.1. Normative References................................... 27 4.2. Informative References................................. 28 5. Security Considerations..................................... 28 6. Acknowledgements............................................ 28 Appendix 1: Sample Service Hierarchy .......................... 29 Appendix 2: Sample Protocol for the Foo IP Service............. 30 Appendix 2a: Interacting with Other IP services................. 30 Appendix 3: Examples........................................... 31 Authors' Addresses.............................................. 32 Full Copyright Statement........................................ 33

Book Id: WPLBN0000693951
Format Type: PDF eBook
File Size: 70.27 KB.
Reproduction Date: 2005
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Title:

Linux Netlink as an Ip Services Protocol

Author:

Salim, J.

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Language:

English

Subject:

Critical Thinking, Logic, Management

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Technical eBooks Collection

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Historic
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