Commit 0b796750 authored Dec 14, 2010 by Michał Mirosław Committed by David S. Miller Dec 16, 2010

net/veth: Fix packet checksumming



We can't change ip_summed from CHECKSUM_PARTIAL to CHECKSUM_NONE
or CHECKSUM_UNNECESSARY because checksum in packet's headers is
not valid and will cause invalid checksum when frame is forwarded.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 76d66158

drivers/net/veth.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -166,7 +166,9 @@ static netdev_tx_t veth_xmit(struct sk_buff skb, struct net_device dev)
		if (!(rcv->flags & IFF_UP))
		goto tx_drop;

		if (dev->features & NETIF_F_NO_CSUM)
		/* don't change ip_summed == CHECKSUM_PARTIAL, as that
		will cause bad checksum on forwarded packets */
		if (skb->ip_summed == CHECKSUM_NONE)
		skb->ip_summed = rcv_priv->ip_summed;

		length = skb->len + ETH_HLEN;