SCTP_FORWARD_TSN_SKIP
if (tp1->sent != SCTP_FORWARD_TSN_SKIP &&
if (tp1->sent == SCTP_FORWARD_TSN_SKIP) {
chk->sent == SCTP_FORWARD_TSN_SKIP)) {
if (at->sent != SCTP_FORWARD_TSN_SKIP) {
tp1->sent = SCTP_FORWARD_TSN_SKIP;