sctp_mid_peek
if (!MID_lt(cmid, sctp_mid_peek(stream, in, csid)))
if (csid == sid && cmid == sctp_mid_peek(stream, in, csid)) {
return !MID_lt(mid, sctp_mid_peek(stream, in, sid));
if (MID_lt(mid, sctp_mid_peek(stream, in, sid)))
if (cevent->mid != sctp_mid_peek(stream, in, sid))
if (event->mid != sctp_mid_peek(stream, in, sid)) {
sctp_mid_peek(stream, out, sid);