Many thanks, I understood ! Pietro Paolini. -----Original Message----- From: Bjørn Mork [mailto:bjorn@xxxxxxx] Sent: lunedì 1 ottobre 2012 12:54 To: Pietro Paolini Cc: kernelnewbies@xxxxxxxxxxxxxxxxx Subject: Re: Difference between IP_IP_ADD_MEMBERSHIP and MCAST_JOIN_GROUP I assume you meant IP_ADD_MEMBERSHIP? IP_ADD_MEMBERSHIP is IPv4 only. MCAST_JOIN_GROUP is protocol independent. This may be clearer if you look at include/linux/in6.h Bjørn _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies