From e6a2161271a1048ca15b9c193fbb81bae00cf6dd Mon Sep 17 00:00:00 2001
From: Ang Way Chuang <wcang@nav6.org>
Date: Tue, 17 Jun 2008 21:10:33 -0700
Subject: [PATCH] --- yaml --- r: 98236 b: refs/heads/master c:
 f09f7ee20c867818bacf79426cf491b2749e7eff 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 cfc1ba66981c..6a58dcea3c4a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fe833fca2eac6b3d3ad5e35f44ad4638362f1da8
+refs/heads/master: f09f7ee20c867818bacf79426cf491b2749e7eff
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;