From 4c68b3f44ee9dd9a82d2831de1368e34dcab3a9b Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Tue, 17 Jun 2008 21:32:08 -0700
Subject: [PATCH] --- yaml --- r: 98246 b: refs/heads/master c:
 4552e1198a08198ce0b42e856845b5394c82c59c h: refs/heads/master v: v3

---
 [refs]                  |  2 +-
 trunk/drivers/net/tun.c | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 15b8032e27b9..0c36d2ac11b6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 58c7821c4264a7ddd6f0c31c5caaf393b3897f10
+refs/heads/master: 4552e1198a08198ce0b42e856845b5394c82c59c
diff --git a/trunk/drivers/net/tun.c b/trunk/drivers/net/tun.c
index 0ce07a339c7e..7ab94c825b57 100644
--- a/trunk/drivers/net/tun.c
+++ b/trunk/drivers/net/tun.c
@@ -313,6 +313,21 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
 
 	switch (tun->flags & TUN_TYPE_MASK) {
 	case TUN_TUN_DEV:
+		if (tun->flags & TUN_NO_PI) {
+			switch (skb->data[0] & 0xf0) {
+			case 0x40:
+				pi.proto = htons(ETH_P_IP);
+				break;
+			case 0x60:
+				pi.proto = htons(ETH_P_IPV6);
+				break;
+			default:
+				tun->dev->stats.rx_dropped++;
+				kfree_skb(skb);
+				return -EINVAL;
+			}
+		}
+
 		skb_reset_mac_header(skb);
 		skb->protocol = pi.proto;
 		skb->dev = tun->dev;