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2022-05-25 - 19:11

Dates and Events:

OSADL Articles:

2022-01-13 12:00

Phase #3 of OSADL project on OPC UA PubSub over TSN successfully completed

Another important milestone on the way to interoperable Open Source real-time Ethernet has been reached


2021-02-09 12:00

Open Source OPC UA PubSub over TSN project phase #3 launched

Letter of Intent with call for participation is now available


2016-11-12 12:00

Raspberry Pi and real-time Linux

Let's have a look at the OSADL QA Farm data


2016-09-17 12:00

Preemption latency of real-time Linux systems

How to measure it – and how to fix it, if it's too high?



Real Time Linux Workshops

1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010

Eighth Real-Time Linux Workshop on October 12 to 15, 2006, in Lanzhou, Gansu, P.R.China

Operating System Modifications for User-Oriented Addressing Model

Dong Zhou and Taoyu Li
Department of Electronic Engineering, Tsinghua University
Tsinghua University, Beijing, 100084, P R China
zhoudªmails.tsinghua.edu.cn
overnitaryªgmail.com

Maoke Chen and Xing Li
Network Research Center, Tsinghua University
Tsinghua University, Beijing, 100084, P R China
(maoke,xing)@cernet.edu.cn

In both IPv4 and IPv6, IP address is assigned to interface and shared by different users on a same host. This model of addressing is not suitable for future Internet-based computing, where user-oriented accounting, behavior tracing, multi-homing and independent port usage must be supported. Because IPv6 provides a big enough space that everyone in the world can own several addresses, it is believed that a new, user-oriented IP addressing model will appear in the near future.

On the other hand, network protocol stacks in current operating systems are designed in the framework of interface-oriented addressing model. To specify a dedicated address to each individual user, the kernel must be modified so that one user can use only its own IP address, either for source or destination of a packet. Secondly, both user and IP address administration tools must contain a map from user ID to a group of address that the user having permission to apply them. Furthermore, the behavior of application programming interface must be modified in order that each user-mode network program binds address properly. Issues of compatibility and security are also discussed.

 

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