- if (sk->sk_state != TCP_CLOSE) {
- struct tcp_sock *tp = tcp_sk(sk);
- struct sk_buff *skb;
-
- if ((skb = tcp_send_head(sk)) != NULL &&
- before(TCP_SKB_CB(skb)->seq, tp->snd_una+tp->snd_wnd)) {
- int err;
- unsigned int mss = tcp_current_mss(sk, 0);
- unsigned int seg_size = tp->snd_una+tp->snd_wnd-TCP_SKB_CB(skb)->seq;
-
- if (before(tp->pushed_seq, TCP_SKB_CB(skb)->end_seq))
- tp->pushed_seq = TCP_SKB_CB(skb)->end_seq;
-
- /* We are probing the opening of a window
- * but the window size is != 0
- * must have been a result SWS avoidance ( sender )
- */
- if (seg_size < TCP_SKB_CB(skb)->end_seq - TCP_SKB_CB(skb)->seq ||
- skb->len > mss) {
- seg_size = min(seg_size, mss);
- TCP_SKB_CB(skb)->flags |= TCPCB_FLAG_PSH;
- if (tcp_fragment(sk, skb, seg_size, mss))
- return -1;
- } else if (!tcp_skb_pcount(skb))
- tcp_set_skb_tso_segs(sk, skb, mss);