--- linux-2.6.11-orig/net/unix/af_unix.c	2005-03-02 16:38:12.000000000 +0900
+++ linux-2.6.11/net/unix/af_unix.c	2005-04-03 16:36:52.000000000 +0900
@@ -1838,6 +1838,7 @@
 static int unix_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
 	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
 	long amount=0;
 	int err;
 
@@ -1848,8 +1849,6 @@
 			err = put_user(amount, (int __user *)arg);
 			break;
 		case SIOCINQ:
-		{
-			struct sk_buff *skb;
 
 			if (sk->sk_state == TCP_LISTEN) {
 				err = -EINVAL;
@@ -1869,8 +1868,21 @@
 			spin_unlock(&sk->sk_receive_queue.lock);
 			err = put_user(amount, (int __user *)arg);
 			break;
-		}
 
+#define SIOCINCOUNT 0x8907
+		case SIOCINCOUNT:
+			/* count the number of packets waiting */
+			if (sk->sk_state == TCP_LISTEN) {
+				err = -EINVAL;
+				break;
+			}
+
+			spin_lock(&sk->sk_receive_queue.lock);
+			skb_queue_walk(&sk->sk_receive_queue, skb)
+				amount++;
+			spin_unlock(&sk->sk_receive_queue.lock);
+			err = put_user(amount, (int __user *)arg);
+			break;
 		default:
 			err = dev_ioctl(cmd, (void __user *)arg);
 			break;