From patchwork Fri Nov 9 02:18:03 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [3/3] ipgre: capture inner headers during encapsulation Date: Thu, 08 Nov 2012 16:18:03 -0000 From: Joseph Gasparakis X-Patchwork-Id: 197912 Message-Id: <1352427483-4380-4-git-send-email-joseph.gasparakis@intel.com> To: davem@davemloft.net, shemminger@vyatta.com, chrisw@sous-sol.org Cc: Joseph Gasparakis , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Peter P Waskiewicz Jr Populating the inner header pointers of skb for ipgre This patch has been compile-tested only. Signed-off-by: Joseph Gasparakis Signed-off-by: Peter P Waskiewicz Jr --- net/ipv4/ip_gre.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 7240f8e..ec3ebb1 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -766,6 +766,7 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev int gre_hlen; __be32 dst; int mtu; + unsigned int offset; if (skb->ip_summed == CHECKSUM_PARTIAL && skb_checksum_help(skb)) @@ -902,6 +903,17 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev tunnel->err_count = 0; } + offset = skb->data - skb->head; + + skb_reset_inner_mac_header(skb); + + if (skb->network_header) + skb_set_inner_network_header(skb, skb->network_header - offset); + + if (skb->transport_header) + skb_set_inner_transport_header(skb, skb->transport_header - + offset); + max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen + rt->dst.header_len; if (skb_headroom(skb) < max_headroom || skb_shared(skb)||