sctp_build_hdrs
if ((err = sctp_build_hdrs(sctp, sleep)) != 0) {
if ((err = sctp_build_hdrs(sctp, KM_SLEEP)) != 0) {
if ((err = sctp_build_hdrs(acceptor, KM_NOSLEEP)) != 0)
extern int sctp_build_hdrs(sctp_t *, int);
retval = sctp_build_hdrs(sctp, KM_NOSLEEP);