>From the fcntl MAN page If the O_NONBLOCK flag is not enabled, then system call is blocked until the lock is removed or converted to a mode that is compatible with the access. So, just to clarify, that commenting out the non-blocking fcntl - does not solve the problem, Error persists. 2009/2/16 Anton VG <anton.vazir@xxxxxxxxx>: > The same stuff with commented out > > // fcntl(nfqfd,F_SETFL,O_NONBLOCK); >> >> With the current interface of libnetfilter_queue, the queue creation must be >> blocking to ensure serialization. I'll document this. I can add some >> functions to allow non-blocking queue creation but that's a different point. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html