Nils Rennebarth wrote: > Hi, > > The help text for NF_CONNTRACK_EVENTS reads: > If this option is enabled, the connection tracking code will > provide a notifier chain that can be used by other kernel code > to get notified about changes in the connection tracking state. > which sounds just like what I need: I want to execute a callback > whenever a conntrack gets destroyed. However studying > nf_conntrack_netlink.c, nf_conntrack_ecache.c and related header files > for quite a while now, i am still unable to figure out how to do that. > > Can someone enlighten me? You have to register a structure nf_ct_event_notifier with the callback function, you have to look at nf_conntrack_ecache.c and nf_conntrack_netlink.c. There one problem though since you can only register one callback and that one is usually used by nf_conntrack_netlink.c You can also catch events from user-space by means of libnetfilter_conntrack, have a look at utils/, it includes some examples. -- 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
