int nl_sock_leave_mcgroup(struct nl_sock *, unsigned int multicast_group);
int nl_sock_send(struct nl_sock *, const struct ofpbuf *, bool wait);
+int nl_sock_send_seq(struct nl_sock *, const struct ofpbuf *,
+ uint32_t nlmsg_seq, bool wait);
int nl_sock_recv(struct nl_sock *, struct ofpbuf *, bool wait);
int nl_sock_transact(struct nl_sock *, const struct ofpbuf *request,
struct ofpbuf **replyp);