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path: root/net/ipv6/xfrm6_mode_tunnel.c
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Diffstat (limited to 'net/ipv6/xfrm6_mode_tunnel.c')
-rw-r--r--net/ipv6/xfrm6_mode_tunnel.c73
1 files changed, 25 insertions, 48 deletions
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index fd84e22..0c742fa 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -25,46 +25,29 @@ static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
IP6_ECN_set_ce(inner_iph);
}
-static inline void ip6ip_ecn_decapsulate(struct sk_buff *skb)
-{
- if (INET_ECN_is_ce(ipv6_get_dsfield(ipv6_hdr(skb))))
- IP_ECN_set_ce(ipip_hdr(skb));
-}
-
/* Add encapsulation header.
*
* The top IP header will be constructed per RFC 2401.
*/
-static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
{
struct dst_entry *dst = skb->dst;
- struct xfrm_dst *xdst = (struct xfrm_dst*)dst;
- struct ipv6hdr *iph, *top_iph;
+ struct ipv6hdr *top_iph;
int dsfield;
- iph = ipv6_hdr(skb);
-
skb_set_network_header(skb, -x->props.header_len);
skb->mac_header = skb->network_header +
offsetof(struct ipv6hdr, nexthdr);
- skb->transport_header = skb->network_header + sizeof(*iph);
+ skb->transport_header = skb->network_header + sizeof(*top_iph);
top_iph = ipv6_hdr(skb);
top_iph->version = 6;
- if (xdst->route->ops->family == AF_INET6) {
- top_iph->priority = iph->priority;
- top_iph->flow_lbl[0] = iph->flow_lbl[0];
- top_iph->flow_lbl[1] = iph->flow_lbl[1];
- top_iph->flow_lbl[2] = iph->flow_lbl[2];
- top_iph->nexthdr = IPPROTO_IPV6;
- } else {
- top_iph->priority = 0;
- top_iph->flow_lbl[0] = 0;
- top_iph->flow_lbl[1] = 0;
- top_iph->flow_lbl[2] = 0;
- top_iph->nexthdr = IPPROTO_IPIP;
- }
- dsfield = ipv6_get_dsfield(top_iph);
+
+ memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
+ sizeof(top_iph->flow_lbl));
+ top_iph->nexthdr = x->inner_mode->afinfo->proto;
+
+ dsfield = XFRM_MODE_SKB_CB(skb)->tos;
dsfield = INET_ECN_encapsulate(dsfield, dsfield);
if (x->props.flags & XFRM_STATE_NOECN)
dsfield &= ~INET_ECN_MASK;
@@ -72,18 +55,15 @@ static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
top_iph->hop_limit = dst_metric(dst->child, RTAX_HOPLIMIT);
ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
- skb->protocol = htons(ETH_P_IPV6);
return 0;
}
-static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
{
int err = -EINVAL;
const unsigned char *old_mac;
- const unsigned char *nh = skb_network_header(skb);
- if (nh[IP6CB(skb)->nhoff] != IPPROTO_IPV6 &&
- nh[IP6CB(skb)->nhoff] != IPPROTO_IPIP)
+ if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPV6)
goto out;
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
goto out;
@@ -92,17 +72,12 @@ static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
(err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
goto out;
- nh = skb_network_header(skb);
- if (nh[IP6CB(skb)->nhoff] == IPPROTO_IPV6) {
- if (x->props.flags & XFRM_STATE_DECAP_DSCP)
- ipv6_copy_dscp(ipv6_hdr(skb), ipipv6_hdr(skb));
- if (!(x->props.flags & XFRM_STATE_NOECN))
- ipip6_ecn_decapsulate(skb);
- } else {
- if (!(x->props.flags & XFRM_STATE_NOECN))
- ip6ip_ecn_decapsulate(skb);
- skb->protocol = htons(ETH_P_IP);
- }
+ if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+ ipv6_copy_dscp(ipv6_get_dsfield(ipv6_hdr(skb)),
+ ipipv6_hdr(skb));
+ if (!(x->props.flags & XFRM_STATE_NOECN))
+ ipip6_ecn_decapsulate(skb);
+
old_mac = skb_mac_header(skb);
skb_set_mac_header(skb, -skb->mac_len);
memmove(skb_mac_header(skb), old_mac, skb->mac_len);
@@ -114,19 +89,21 @@ out:
}
static struct xfrm_mode xfrm6_tunnel_mode = {
- .input = xfrm6_tunnel_input,
- .output = xfrm6_tunnel_output,
+ .input2 = xfrm6_mode_tunnel_input,
+ .input = xfrm_prepare_input,
+ .output2 = xfrm6_mode_tunnel_output,
+ .output = xfrm6_prepare_output,
.owner = THIS_MODULE,
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
};
-static int __init xfrm6_tunnel_init(void)
+static int __init xfrm6_mode_tunnel_init(void)
{
return xfrm_register_mode(&xfrm6_tunnel_mode, AF_INET6);
}
-static void __exit xfrm6_tunnel_exit(void)
+static void __exit xfrm6_mode_tunnel_exit(void)
{
int err;
@@ -134,7 +111,7 @@ static void __exit xfrm6_tunnel_exit(void)
BUG_ON(err);
}
-module_init(xfrm6_tunnel_init);
-module_exit(xfrm6_tunnel_exit);
+module_init(xfrm6_mode_tunnel_init);
+module_exit(xfrm6_mode_tunnel_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_TUNNEL);