think you Jan for this explanations. Now im traying to build a mark of linux multicast working. So to port it to rtnet , i will need some informations about RTNET archetecture . that will help to do it cleanly and correctly.
Amine On Tuesday 24 May 2005 20:58, you wrote: > Amine El hedadi schrieb: > > I need to use rtnet for audio & video streaming , so i want to add > > support for multicasting to rtnet. > > Now im trying to understand the working of mutlicasting in linux kernel, > > and i look for the way to port it to rtnet. > > So if you have any propositon to do that , please let me know. > > Beyond the aspect of how to manage rtskbs (RTnet's real-time packet > buffers) for which I already posted a mail thread link, you should > certainly first start with multicast at Ethernet level. First, you need > support in at least one driver. Pick one and extend (or re-enable) its > multicast features. Watch out for potentially required hard real-time > synchronisation means between transmission/reception handlers and > multicast manipulation functions. Feel free to ask what to use or how > certain things work inside the driver. > > Next, it's likely useful to add the required API to the packet socket > interface (stack/packet/af_packet.c). That API has to provide means for > registering to and detaching from a multicast group at Ethernet protocol > level. Check Linux man pages etc. for documentation. > > Later, the integration in RTnet's UDP/IP stack can be addressed. Here, > the question needs to be answered how to map the multicast IP address on > Ethernet MAC addresses. Not sure right now how this happens in normal > networks, but I guess a static configuration is likely the easiest way > for a first approach in RTnet. > > Looking forward to further discussions! I'm also interested in learning > more about multicast implemenation and potential hard real-time issues. > > Jan ------------------------------------------------------- SF.Net email is sponsored by: GoToMeeting - the easiest way to collaborate online with coworkers and clients while avoiding the high cost of travel and communications. There is no equipment to buy and you can meet as often as you want. Try it free.http://ads.osdn.com/?ad_id=7402&alloc_id=16135&op=click _______________________________________________ RTnet-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/rtnet-developers
