Hi, Actually, I don't really understand why imo.imo_multicast_loop is set to 1 in send_packet, ip_mroute.c
It seems we don't need to loop the packet once it is mrouted? If the packet is emitted locally, the imo_multicast_loop set by the socket option makes the packet loop back if necessary. Emeric ----- Mail original ----- De: "Emeric POUPON" <emeric.pou...@stormshield.eu> À: freebsd-net@freebsd.org Envoyé: Mercredi 24 Juin 2015 10:22:45 Objet: Multicast routing questions Hello, I'm testing multicast routing on FreeBSD 9.3 and I have a question: In packet reception, it seems the packet is received locally as many times the packet is rerouted + 1: ip_input -> ip_mforward -> ip_output (as many times there are dst interfaces in the route cache entry) -> ip_mloopback -> if_simloop (rcvif becomes the ifp of the output interface) -> ip_input -> ip_mforward -> ... In ip_input, after each ip_mforward call, the packet is processed locally (using the goto "ours:") Futhermore it seems this infinite loop is actually broken thanks to a test in ip_mforward that checks the ifp is the same as the registered one in the cache entry. Maybe I missed something, but it does not seem to be working as expected. What do you think? Emeric _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
