tcp_receive_window
(tcp_receive_window(tp) <= inet_csk(sk)->icsk_ack.rcv_mss);
__u32 rcv_window_now = tcp_receive_window(tp);
seq_limit = tp->rcv_nxt + tcp_receive_window(tp);
if (tcp_receive_window(tp) == 0) {
tp->rcv_nxt + tcp_receive_window(tp))) {
if (!tcp_receive_window(tp)) {
tp->rcv_nxt + tcp_receive_window(tp)))
tcptw->tw_rcv_wnd = tcp_receive_window(tp);
cur_win = tcp_receive_window(tp);
if (!skb->len || skb->len < tcp_receive_window(tp))