Appreciate any help on this Thanks On Mon, Jan 23, 2017 at 9:20 AM, prashantkumar dhotre <prashantkumardhotre@xxxxxxxxx> wrote: > Hi experts, > I am new to netlink sockets. > In my app , I am getting EPOLLERR in epoll_wait() on netlink socket > continuously. > epoll just notifies that there is a read event on socket (it does not > tell if it is read or epollerr). > What could be cause of this and what EPOLLERR on memory mapped netlink > socket mean.is this Other side of netlink (kernel side) closed > connection ?even if kernel side closed connection why non-stop > repeated EPOLLERR s on netlink sockets ? > What action should we take in such cases ? just close the socket or > call getsockopt(SO_ERROR) to retrieve the pending error state from the > socket and just continue without closing socket? > > how do we detect if kernel side closed the connection ? > My understanding is : > if we get read event notification from epoll on memory mapped netlink > socket and in RX ring if the frame is neither NL_MMAP_STATUS_VALID and > nor NL_MMAP_STATUS_COPY then we can conclude that this is a 'close()' > from remote kernel socket and I can close connection by calling > close() on my netlink socket. > Is above understanding correct ? > > Please -- 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
