sctp_endpoint_hold
int sctp_endpoint_hold(struct sctp_endpoint *ep);
sctp_endpoint_hold(assoc->ep);
sctp_endpoint_hold(asoc->ep);
sctp_endpoint_hold(sctp_ep(rcvr));
sctp_endpoint_hold(ep);
if (!sctp_endpoint_hold(ep)) { /* asoc can be peeled off */
if (sctp_endpoint_hold(ep)) { /* asoc can be peeled off */