sendwin
long len, recvwin, sendwin;
sendwin = min(tp->snd_wnd, tp->snd_cwnd + nsacked);
sendwin = min(sendwin, tp->snd_bwnd);
if (sendwin == 0) {
sendwin = 1;
len = (long)ulmin(so->so_snd.ssb_cc, sendwin) - off;
if (sendwin == 0 && tp->t_state != TCPS_SYN_RECEIVED) {
sendwin >= (so->so_snd.ssb_cc -
long len, off, sendwin;
sendwin = min(tp->snd_wnd, tp->snd_bwnd);
len = (long) ulmin(so->so_snd.ssb_cc, sendwin) - off;
(void) signal(SIGWINCH, sendwin);