*
*/
+#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>
return xfrm4_rcv_encap(skb, 0);
}
+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) &&
- INET_ECN_is_not_ce(inner_iph->tos))
+ if (INET_ECN_is_ce(outer_iph->tos))
IP_ECN_set_ce(inner_iph);
}
{
switch (nexthdr) {
case IPPROTO_IPIP:
- if (!pskb_may_pull(skb, sizeof(struct iphdr)))
- return -EINVAL;
*spi = skb->nh.iph->saddr;
*seq = 0;
return 0;
return xfrm_parse_spi(skb, nexthdr, spi, seq);
}
+#ifdef CONFIG_NETFILTER
+static inline int xfrm4_rcv_encap_finish(struct sk_buff *skb)
+{
+ struct iphdr *iph = skb->nh.iph;
+
+ if (skb->dst == NULL) {
+ if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
+ skb->dev))
+ goto drop;
+ }
+ return dst_input(skb);
+drop:
+ kfree_skb(skb);
+ return NET_RX_DROP;
+}
+#endif
+
int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
{
int err;
u32 spi, seq;
- struct sec_decap_state xfrm_vec[XFRM_MAX_DEPTH];
+ struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
struct xfrm_state *x;
int xfrm_nr = 0;
int decaps = 0;
if (unlikely(x->km.state != XFRM_STATE_VALID))
goto drop_unlock;
+ if ((x->encap ? x->encap->encap_type : 0) != encap_type)
+ goto drop_unlock;
+
if (x->props.replay_window && xfrm_replay_check(x, seq))
goto drop_unlock;
if (xfrm_state_check_expire(x))
goto drop_unlock;
- xfrm_vec[xfrm_nr].decap.decap_type = encap_type;
- if (x->type->input(x, &(xfrm_vec[xfrm_nr].decap), skb))
+ if (x->type->input(x, skb))
goto drop_unlock;
/* only the first xfrm gets the encap type */
spin_unlock(&x->lock);
- xfrm_vec[xfrm_nr++].xvec = x;
+ xfrm_vec[xfrm_nr++] = x;
iph = skb->nh.iph;
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,
if (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
goto drop;
- memcpy(skb->sp->x+skb->sp->len, xfrm_vec, xfrm_nr*sizeof(struct sec_decap_state));
+ memcpy(skb->sp->xvec + skb->sp->len, xfrm_vec,
+ xfrm_nr * sizeof(xfrm_vec[0]));
skb->sp->len += xfrm_nr;
+ nf_reset(skb);
+
if (decaps) {
if (!(skb->dev->flags&IFF_LOOPBACK)) {
dst_release(skb->dst);
netif_rx(skb);
return 0;
} else {
+#ifdef CONFIG_NETFILTER
+ __skb_push(skb, skb->data - skb->nh.raw);
+ skb->nh.iph->tot_len = htons(skb->len);
+ ip_send_check(skb->nh.iph);
+
+ NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
+ xfrm4_rcv_encap_finish);
+ return 0;
+#else
return -skb->nh.iph->protocol;
+#endif
}
drop_unlock:
xfrm_state_put(x);
drop:
while (--xfrm_nr >= 0)
- xfrm_state_put(xfrm_vec[xfrm_nr].xvec);
+ xfrm_state_put(xfrm_vec[xfrm_nr]);
kfree_skb(skb);
return 0;