Hi jan; > What about rt_ip_route_output()? Doesn't it exactly do what you need? It > fills a dest_route structure which then contains a pointer to the output > rtdev. Take a look at rt_udp_sendmsg() for a usage example. That's ok, rt_ip_route_output() give a pointer to the output rtdev , but only in the case when we add the multicast adress to route table : # rtroute add 239.0.0.2 01:00:5e:00:00:01 dev rteth0 , that work well, But in the case of multicat, we can calculate the mac address from the IP address without using routing table. So i have added a conditions test before the call of the "rt_ip_route_output()" in udp_sendmsg function if the dist address is multicast i calculate the mac adresse and i locate the rtdev by the local address (saddr).
So nowday Im able to recive and send mulicast packets with rtnet .Im testing it now and i will send you a first realise of my patch soon. PS : i have only enabled the multicast support for the two NICs ,8139too et e100. Amine > Hi Amine, > > sorry for the late reply. > > >>What are you actually planning? Likely there is a different way to > >>achieve it > > > > TO send an IGMP request to join a multicast goup ,the only information i > > had is the rt_socket ,and i need to send directly the igmp packet without > > passing by the ip level , that mean to use directly the xmit_start > > function ,to use it i need rtnet_device pointer. you see the problem i > > had ? > > So I have resolved the problem by adding a new function in "rtdev.c", its > > role is to get rtnet_device by local_ip adress.it work well. The only > > constrain that we must specify the local ip adress when using multicast. > > > Jan > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. How far can you > shotput a projector? How fast can you ride your desk chair down the office > luge track? If you want to score the big prize, get to know the little guy. > Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 > _______________________________________________ > RTnet-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/rtnet-developers ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 _______________________________________________ RTnet-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/rtnet-developers
