sctp_find_ifn
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
if (sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index) == NULL) {
sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
struct sctp_ifn *sctp_find_ifn(void *ifn, uint32_t ifn_index);