#include <linux/spinlock.h>
#include <net/icmp.h>
#include <net/protocol.h>
-#include <asm/scatterlist.h>
/* Clear mutable options and find final destination to substitute
memcpy(top_iph+1, iph+1, top_iph->ihl*4 - sizeof(struct iphdr));
}
- ip_send_check(top_iph);
-
err = 0;
error:
{
int ah_hlen;
int ihl;
+ int nexthdr;
int err = -EINVAL;
struct iphdr *iph;
struct ip_auth_hdr *ah;
ah = (struct ip_auth_hdr *)skb->data;
ahp = x->data;
+ nexthdr = ah->nexthdr;
ah_hlen = (ah->hdrlen + 2) << 2;
if (ah_hlen != XFRM_ALIGN8(sizeof(*ah) + ahp->icv_full_len) &&
if (ip_clear_mutable_options(iph, &dummy))
goto out;
}
+
+ spin_lock(&x->lock);
{
u8 auth_data[MAX_AH_AUTH_LEN];
skb_push(skb, ihl);
err = ah_mac_digest(ahp, skb, ah->auth_data);
if (err)
- goto out;
- err = -EINVAL;
- if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) {
- x->stats.integrity_failed++;
- goto out;
- }
+ goto unlock;
+ if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len))
+ err = -EBADMSG;
}
- ((struct iphdr*)work_buf)->protocol = ah->nexthdr;
+unlock:
+ spin_unlock(&x->lock);
+
+ if (err)
+ goto out;
+
skb->network_header += ah_hlen;
memcpy(skb_network_header(skb), work_buf, ihl);
skb->transport_header = skb->network_header;
__skb_pull(skb, ah_hlen + ihl);
- return 0;
+ return nexthdr;
out:
return err;
}
-static struct xfrm_type ah_type =
+static const struct xfrm_type ah_type =
{
.description = "AH4",
.owner = THIS_MODULE,