+static int tcp_repair_set_window(struct tcp_sock *tp, char __user *optbuf, int len)
+{
+ struct tcp_repair_window opt;
+
+ if (!tp->repair)
+ return -EPERM;
+
+ if (len != sizeof(opt))
+ return -EINVAL;
+
+ if (copy_from_user(&opt, optbuf, sizeof(opt)))
+ return -EFAULT;
+
+ if (opt.max_window < opt.snd_wnd)
+ return -EINVAL;
+
+ if (after(opt.snd_wl1, tp->rcv_nxt + opt.rcv_wnd))
+ return -EINVAL;
+
+ if (after(opt.rcv_wup, tp->rcv_nxt))
+ return -EINVAL;
+
+ tp->snd_wl1 = opt.snd_wl1;
+ tp->snd_wnd = opt.snd_wnd;
+ tp->max_window = opt.max_window;
+
+ tp->rcv_wnd = opt.rcv_wnd;
+ tp->rcv_wup = opt.rcv_wup;
+
+ return 0;
+}
+