static void tcp_fixup_sndbuf(struct sock *sk)
{
	int sndmem = SKB_TRUESIZE(tcp_sk(sk)->rx_opt.mss_clamp + MAX_TCP_HEADER);

	sndmem *= TCP_INIT_CWND;
	if (sk->sk_sndbuf < sndmem)
		sk->sk_sndbuf = min(sndmem, sysctl_tcp_wmem[2]);
}