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path: root/net/ipv4/xfrm4_mode_tunnel.c
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Diffstat (limited to 'net/ipv4/xfrm4_mode_tunnel.c')
-rw-r--r--net/ipv4/xfrm4_mode_tunnel.c93
1 files changed, 27 insertions, 66 deletions
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index e4deecba6dd2..8dee617ee900 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -16,92 +16,60 @@
static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
{
- struct iphdr *outer_iph = ip_hdr(skb);
struct iphdr *inner_iph = ipip_hdr(skb);
- if (INET_ECN_is_ce(outer_iph->tos))
+ if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
IP_ECN_set_ce(inner_iph);
}
-static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
-{
- if (INET_ECN_is_ce(iph->tos))
- IP6_ECN_set_ce(ipv6_hdr(skb));
-}
-
/* Add encapsulation header.
*
* The top IP header will be constructed per RFC 2401.
*/
-static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm4_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 iphdr *iph, *top_iph;
+ struct iphdr *top_iph;
int flags;
- iph = ip_hdr(skb);
-
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 + sizeof(*iph);
+ skb->transport_header = skb->network_header + sizeof(*top_iph);
top_iph = ip_hdr(skb);
top_iph->ihl = 5;
top_iph->version = 4;
- flags = x->props.flags;
+ top_iph->protocol = x->inner_mode->afinfo->proto;
/* DS disclosed */
- if (xdst->route->ops->family == AF_INET) {
- top_iph->protocol = IPPROTO_IPIP;
- top_iph->tos = INET_ECN_encapsulate(iph->tos, iph->tos);
- top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
- 0 : (iph->frag_off & htons(IP_DF));
- }
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- else {
- struct ipv6hdr *ipv6h = (struct ipv6hdr*)iph;
- top_iph->protocol = IPPROTO_IPV6;
- top_iph->tos = INET_ECN_encapsulate(iph->tos, ipv6_get_dsfield(ipv6h));
- top_iph->frag_off = 0;
- }
-#endif
+ top_iph->tos = INET_ECN_encapsulate(XFRM_MODE_SKB_CB(skb)->tos,
+ XFRM_MODE_SKB_CB(skb)->tos);
+ flags = x->props.flags;
if (flags & XFRM_STATE_NOECN)
IP_ECN_clear(top_iph);
- if (!top_iph->frag_off)
- __ip_select_ident(top_iph, dst->child, 0);
+ top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
+ 0 : XFRM_MODE_SKB_CB(skb)->frag_off;
+ ip_select_ident(top_iph, dst->child, NULL);
top_iph->ttl = dst_metric(dst->child, RTAX_HOPLIMIT);
top_iph->saddr = x->props.saddr.a4;
top_iph->daddr = x->id.daddr.a4;
- skb->protocol = htons(ETH_P_IP);
-
- memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
return 0;
}
-static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm4_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
{
- struct iphdr *iph = ip_hdr(skb);
const unsigned char *old_mac;
int err = -EINVAL;
- switch (iph->protocol){
- case IPPROTO_IPIP:
- break;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- case IPPROTO_IPV6:
- break;
-#endif
- default:
- goto out;
- }
+ if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPIP)
+ goto out;
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
goto out;
@@ -110,20 +78,11 @@ static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
(err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
goto out;
- iph = ip_hdr(skb);
- if (iph->protocol == IPPROTO_IPIP) {
- if (x->props.flags & XFRM_STATE_DECAP_DSCP)
- ipv4_copy_dscp(iph, ipip_hdr(skb));
- if (!(x->props.flags & XFRM_STATE_NOECN))
- ipip_ecn_decapsulate(skb);
- }
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- else {
- if (!(x->props.flags & XFRM_STATE_NOECN))
- ipip6_ecn_decapsulate(iph, skb);
- skb->protocol = htons(ETH_P_IPV6);
- }
-#endif
+ if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+ ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb));
+ if (!(x->props.flags & XFRM_STATE_NOECN))
+ ipip_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);
@@ -135,19 +94,21 @@ out:
}
static struct xfrm_mode xfrm4_tunnel_mode = {
- .input = xfrm4_tunnel_input,
- .output = xfrm4_tunnel_output,
+ .input2 = xfrm4_mode_tunnel_input,
+ .input = xfrm_prepare_input,
+ .output2 = xfrm4_mode_tunnel_output,
+ .output = xfrm4_prepare_output,
.owner = THIS_MODULE,
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
};
-static int __init xfrm4_tunnel_init(void)
+static int __init xfrm4_mode_tunnel_init(void)
{
return xfrm_register_mode(&xfrm4_tunnel_mode, AF_INET);
}
-static void __exit xfrm4_tunnel_exit(void)
+static void __exit xfrm4_mode_tunnel_exit(void)
{
int err;
@@ -155,7 +116,7 @@ static void __exit xfrm4_tunnel_exit(void)
BUG_ON(err);
}
-module_init(xfrm4_tunnel_init);
-module_exit(xfrm4_tunnel_exit);
+module_init(xfrm4_mode_tunnel_init);
+module_exit(xfrm4_mode_tunnel_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TUNNEL);