int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
int flags, int *addr_len);
int tcp_set_rcvlowat(struct sock *sk, int val);
+int tcp_set_window_clamp(struct sock *sk, int val);
void tcp_data_ready(struct sock *sk);
#ifdef CONFIG_MMU
int tcp_mmap(struct file *file, struct socket *sock,
}
EXPORT_SYMBOL(tcp_sock_set_keepcnt);
+int tcp_set_window_clamp(struct sock *sk, int val)
+{
+ struct tcp_sock *tp = tcp_sk(sk);
+
+ if (!val) {
+ if (sk->sk_state != TCP_CLOSE)
+ return -EINVAL;
+ tp->window_clamp = 0;
+ } else {
+ tp->window_clamp = val < SOCK_MIN_RCVBUF / 2 ?
+ SOCK_MIN_RCVBUF / 2 : val;
+ }
+ return 0;
+}
+
/*
* Socket option code for TCP.
*/
break;
case TCP_WINDOW_CLAMP:
- if (!val) {
- if (sk->sk_state != TCP_CLOSE) {
- err = -EINVAL;
- break;
- }
- tp->window_clamp = 0;
- } else
- tp->window_clamp = val < SOCK_MIN_RCVBUF / 2 ?
- SOCK_MIN_RCVBUF / 2 : val;
+ err = tcp_set_window_clamp(sk, val);
break;
case TCP_QUICKACK: