diff options
author | Steffen Klassert <steffen.klassert@secunet.com> | 2017-04-14 10:06:01 +0200 |
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committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-04-14 10:06:01 +0200 |
commit | c35fe4106b928d0a5909cfdac53c1db559b24299 (patch) | |
tree | eeaebe39a98ae156227b92412c2cb46c0de88900 /net | |
parent | 21f42cc95f07c1d7827b339c04442e147411e44b (diff) | |
download | linux-c35fe4106b928d0a5909cfdac53c1db559b24299.tar.bz2 |
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 <steffen.klassert@secunet.com>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv4/xfrm4_mode_transport.c | 32 | ||||
-rw-r--r-- | net/ipv4/xfrm4_mode_tunnel.c | 25 | ||||
-rw-r--r-- | net/ipv6/xfrm6_mode_transport.c | 33 | ||||
-rw-r--r-- | net/ipv6/xfrm6_mode_tunnel.c | 24 |
4 files changed, 114 insertions, 0 deletions
diff --git a/net/ipv4/xfrm4_mode_transport.c b/net/ipv4/xfrm4_mode_transport.c index 4acc0508c5eb..6c2411d09386 100644 --- a/net/ipv4/xfrm4_mode_transport.c +++ b/net/ipv4/xfrm4_mode_transport.c @@ -12,6 +12,7 @@ #include <net/dst.h> #include <net/ip.h> #include <net/xfrm.h> +#include <net/protocol.h> /* Add encapsulation header. * @@ -56,9 +57,40 @@ static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb) return 0; } +static struct sk_buff *xfrm4_transport_gso_segment(struct xfrm_state *x, + struct sk_buff *skb, + netdev_features_t features) +{ + const struct net_offload *ops; + struct sk_buff *segs = ERR_PTR(-EINVAL); + struct xfrm_offload *xo = xfrm_offload(skb); + + skb->transport_header += x->props.header_len; + ops = rcu_dereference(inet_offloads[xo->proto]); + if (likely(ops && ops->callbacks.gso_segment)) + segs = ops->callbacks.gso_segment(skb, features); + + return segs; +} + +static void xfrm4_transport_xmit(struct xfrm_state *x, struct sk_buff *skb) +{ + struct xfrm_offload *xo = xfrm_offload(skb); + + skb_reset_mac_len(skb); + pskb_pull(skb, skb->mac_len + sizeof(struct iphdr) + x->props.header_len); + + if (xo->flags & XFRM_GSO_SEGMENT) { + skb_reset_transport_header(skb); + skb->transport_header -= x->props.header_len; + } +} + static struct xfrm_mode xfrm4_transport_mode = { .input = xfrm4_transport_input, .output = xfrm4_transport_output, + .gso_segment = xfrm4_transport_gso_segment, + .xmit = xfrm4_transport_xmit, .owner = THIS_MODULE, .encap = XFRM_MODE_TRANSPORT, }; diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c index 35feda676464..d3f2434fa0b8 100644 --- a/net/ipv4/xfrm4_mode_tunnel.c +++ b/net/ipv4/xfrm4_mode_tunnel.c @@ -96,11 +96,36 @@ out: return err; } +static struct sk_buff *xfrm4_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 xfrm4_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 iphdr); + } + + skb_reset_mac_len(skb); + pskb_pull(skb, skb->mac_len + x->props.header_len); +} + static struct xfrm_mode xfrm4_tunnel_mode = { .input2 = xfrm4_mode_tunnel_input, .input = xfrm_prepare_input, .output2 = xfrm4_mode_tunnel_output, .output = xfrm4_prepare_output, + .gso_segment = xfrm4_mode_tunnel_gso_segment, + .xmit = xfrm4_mode_tunnel_xmit, .owner = THIS_MODULE, .encap = XFRM_MODE_TUNNEL, .flags = XFRM_MODE_FLAG_TUNNEL, diff --git a/net/ipv6/xfrm6_mode_transport.c b/net/ipv6/xfrm6_mode_transport.c index 4439ee44c8b0..eb9b36b06c1d 100644 --- a/net/ipv6/xfrm6_mode_transport.c +++ b/net/ipv6/xfrm6_mode_transport.c @@ -13,6 +13,7 @@ #include <net/dst.h> #include <net/ipv6.h> #include <net/xfrm.h> +#include <net/protocol.h> /* Add encapsulation header. * @@ -61,9 +62,41 @@ static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb) return 0; } +static struct sk_buff *xfrm4_transport_gso_segment(struct xfrm_state *x, + struct sk_buff *skb, + netdev_features_t features) +{ + const struct net_offload *ops; + struct sk_buff *segs = ERR_PTR(-EINVAL); + struct xfrm_offload *xo = xfrm_offload(skb); + + skb->transport_header += x->props.header_len; + ops = rcu_dereference(inet6_offloads[xo->proto]); + if (likely(ops && ops->callbacks.gso_segment)) + segs = ops->callbacks.gso_segment(skb, features); + + return segs; +} + +static void xfrm6_transport_xmit(struct xfrm_state *x, struct sk_buff *skb) +{ + struct xfrm_offload *xo = xfrm_offload(skb); + + skb_reset_mac_len(skb); + pskb_pull(skb, skb->mac_len + sizeof(struct ipv6hdr) + x->props.header_len); + + if (xo->flags & XFRM_GSO_SEGMENT) { + skb_reset_transport_header(skb); + skb->transport_header -= x->props.header_len; + } +} + + static struct xfrm_mode xfrm6_transport_mode = { .input = xfrm6_transport_input, .output = xfrm6_transport_output, + .gso_segment = xfrm4_transport_gso_segment, + .xmit = xfrm6_transport_xmit, .owner = THIS_MODULE, .encap = XFRM_MODE_TRANSPORT, }; 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, |