taglinefilesource code
win_size895net/ipv4/tcp_output.cunsigned long win_size;
win_size904net/ipv4/tcp_output.cwin_size = sk->window_seq - sk->sent_seq;
win_size917net/ipv4/tcp_output.cbuff = sock_wmalloc(sk, win_size + th->doff * 4 + 
win_size970net/ipv4/tcp_output.cbuff->csum = csum_partial_copy((void *)(th + 1), skb_put(buff,win_size),
win_size971net/ipv4/tcp_output.cwin_size + th->doff*4 - sizeof(*th), 0);
win_size977net/ipv4/tcp_output.cbuff->end_seq = sk->sent_seq + win_size;
win_size979net/ipv4/tcp_output.cif(th->urg && ntohs(th->urg_ptr) < win_size)
win_size987net/ipv4/tcp_output.cnth->doff * 4 + win_size , buff);