Hi, I use the libipq library for kernel space / user space communication, libipq uses netlink sockets for this purpose ..... now can I tune the rcvbuf and sndbuf sizes for this netlink socket using setsockopt ? If I use libipq then I believe none of the libipq calls give me the socket descriptor of the netlink socket being used by the ip_queue module, so how do I do a setsockopt on this to change the rcvbuf and sndbuf sizes to the maximum possible ?? thanks Amit "DISCLAIMER: This message is proprietary to Hughes Software Systems Limited (HSS) and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. HSS accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus."