* Split up af-specific portion
* Derek Atkins <derek@ihtfp.com>
* Add Encapsulation support
- *
+ *
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
-#include <net/inet_ecn.h>
#include <net/ip.h>
#include <net/xfrm.h>
EXPORT_SYMBOL(xfrm4_rcv);
-static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
-{
- struct iphdr *outer_iph = skb->nh.iph;
- struct iphdr *inner_iph = skb->h.ipiph;
-
- if (INET_ECN_is_ce(outer_iph->tos))
- IP_ECN_set_ce(inner_iph);
-}
-
-static int xfrm4_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq)
+static int xfrm4_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq)
{
switch (nexthdr) {
case IPPROTO_IPIP:
if (skb->dst == NULL) {
if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
- skb->dev))
+ skb->dev))
goto drop;
}
return dst_input(skb);
int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
{
int err;
- u32 spi, seq;
+ __be32 spi, seq;
struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
struct xfrm_state *x;
int xfrm_nr = 0;
xfrm_vec[xfrm_nr++] = x;
- iph = skb->nh.iph;
-
- if (x->props.mode) {
- if (iph->protocol != IPPROTO_IPIP)
- goto drop;
- if (!pskb_may_pull(skb, sizeof(struct iphdr)))
- goto drop;
- if (skb_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
- goto drop;
- if (x->props.flags & XFRM_STATE_DECAP_DSCP)
- ipv4_copy_dscp(iph, skb->h.ipiph);
- if (!(x->props.flags & XFRM_STATE_NOECN))
- ipip_ecn_decapsulate(skb);
- skb->mac.raw = memmove(skb->data - skb->mac_len,
- skb->mac.raw, skb->mac_len);
- skb->nh.raw = skb->data;
- memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
+ if (x->mode->input(x, skb))
+ goto drop;
+
+ if (x->props.mode == XFRM_MODE_TUNNEL) {
decaps = 1;
break;
}
ip_send_check(skb->nh.iph);
NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
- xfrm4_rcv_encap_finish);
+ xfrm4_rcv_encap_finish);
return 0;
#else
return -skb->nh.iph->protocol;