From c35fe4106b928d0a5909cfdac53c1db559b24299 Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Fri, 14 Apr 2017 10:06:01 +0200 Subject: xfrm: Add mode handlers for IPsec on layer 2 This patch adds a gso_segment and xmit callback for the xfrm_mode and implement these functions for tunnel and transport mode. Signed-off-by: Steffen Klassert --- net/ipv6/xfrm6_mode_tunnel.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'net/ipv6/xfrm6_mode_tunnel.c') diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c index 372855eeaf42..19a60fc4c29b 100644 --- a/net/ipv6/xfrm6_mode_tunnel.c +++ b/net/ipv6/xfrm6_mode_tunnel.c @@ -96,11 +96,35 @@ out: return err; } +static struct sk_buff *xfrm6_mode_tunnel_gso_segment(struct xfrm_state *x, + struct sk_buff *skb, + netdev_features_t features) +{ + __skb_push(skb, skb->mac_len); + return skb_mac_gso_segment(skb, features); + +} + +static void xfrm6_mode_tunnel_xmit(struct xfrm_state *x, struct sk_buff *skb) +{ + struct xfrm_offload *xo = xfrm_offload(skb); + + if (xo->flags & XFRM_GSO_SEGMENT) { + skb->network_header = skb->network_header - x->props.header_len; + skb->transport_header = skb->network_header + sizeof(struct ipv6hdr); + } + + skb_reset_mac_len(skb); + pskb_pull(skb, skb->mac_len + x->props.header_len); +} + static struct xfrm_mode xfrm6_tunnel_mode = { .input2 = xfrm6_mode_tunnel_input, .input = xfrm_prepare_input, .output2 = xfrm6_mode_tunnel_output, .output = xfrm6_prepare_output, + .gso_segment = xfrm6_mode_tunnel_gso_segment, + .xmit = xfrm6_mode_tunnel_xmit, .owner = THIS_MODULE, .encap = XFRM_MODE_TUNNEL, .flags = XFRM_MODE_FLAG_TUNNEL, -- cgit v1.2.3-59-g8ed1b