diff options
Diffstat (limited to 'net/ipv4/xfrm4_mode_transport.c')
| -rw-r--r-- | net/ipv4/xfrm4_mode_transport.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_mode_transport.c b/net/ipv4/xfrm4_mode_transport.c index fd840c7d75e..bf1498c138e 100644 --- a/net/ipv4/xfrm4_mode_transport.c +++ b/net/ipv4/xfrm4_mode_transport.c @@ -23,6 +23,15 @@ static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb) struct iphdr *iph = ip_hdr(skb); int ihl = iph->ihl * 4; + if (x->alg_flags & XFRM_ALGO_FLAGS_OFFLOAD_TRANPORT) { + /* Hardware offload will take care of moving the IP header */ + skb_set_network_header(skb, -x->props.header_len); + skb->mac_header = skb->network_header + + offsetof(struct iphdr, protocol); + skb->transport_header = skb->network_header + ihl; + return 0; + } + skb_set_network_header(skb, -x->props.header_len); skb->mac_header = skb->network_header + offsetof(struct iphdr, protocol); @@ -42,8 +51,16 @@ static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb) */ static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb) { - int ihl = skb->data - skb_transport_header(skb); + int ihl; + + if (x->alg_flags & XFRM_ALGO_FLAGS_OFFLOAD_TRANPORT) { + /* Hardware offload will take care of move the IP header */ + skb->network_header = skb->transport_header; + skb_reset_transport_header(skb); + return 0; + } + ihl = skb->data - skb_transport_header(skb); if (skb->transport_header != skb->network_header) { memmove(skb_transport_header(skb), skb_network_header(skb), ihl); |