sctp_make_err
*errmp = sctp_make_err(sctp,
emp = sctp_make_err(sctp, serror, details, len);
extern mblk_t *sctp_make_err(sctp_t *, uint16_t, void *, size_t);
errmp = sctp_make_err(sctp, SCTP_ERR_COOKIE_SHUT, NULL, 0);