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path: root/net/ipv6/xfrm6_mode_beet.c
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Diffstat (limited to 'net/ipv6/xfrm6_mode_beet.c')
-rw-r--r--net/ipv6/xfrm6_mode_beet.c48
1 files changed, 30 insertions, 18 deletions
diff --git a/net/ipv6/xfrm6_mode_beet.c b/net/ipv6/xfrm6_mode_beet.c
index 2bfb4f05c14c..0527d11c1ae3 100644
--- a/net/ipv6/xfrm6_mode_beet.c
+++ b/net/ipv6/xfrm6_mode_beet.c
@@ -19,31 +19,39 @@
#include <net/ipv6.h>
#include <net/xfrm.h>
+static void xfrm6_beet_make_header(struct sk_buff *skb)
+{
+ struct ipv6hdr *iph = ipv6_hdr(skb);
+
+ iph->version = 6;
+
+ memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
+ sizeof(iph->flow_lbl));
+ iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
+
+ ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
+ iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
+}
+
/* Add encapsulation header.
*
* The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt.
*/
static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb)
{
- struct ipv6hdr *iph, *top_iph;
- u8 *prevhdr;
- int hdr_len;
+ struct ipv6hdr *top_iph;
- iph = ipv6_hdr(skb);
-
- hdr_len = ip6_find_1stfragopt(skb, &prevhdr);
-
- skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data);
skb_set_network_header(skb, -x->props.header_len);
- skb->transport_header = skb->network_header + hdr_len;
- __skb_pull(skb, hdr_len);
+ skb->mac_header = skb->network_header +
+ offsetof(struct ipv6hdr, nexthdr);
+ skb->transport_header = skb->network_header + sizeof(*top_iph);
+
+ xfrm6_beet_make_header(skb);
top_iph = ipv6_hdr(skb);
- memmove(top_iph, iph, hdr_len);
ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
-
return 0;
}
@@ -52,19 +60,21 @@ static int xfrm6_beet_input(struct xfrm_state *x, struct sk_buff *skb)
struct ipv6hdr *ip6h;
const unsigned char *old_mac;
int size = sizeof(struct ipv6hdr);
- int err = -EINVAL;
+ int err;
- if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+ err = skb_cow_head(skb, size + skb->mac_len);
+ if (err)
goto out;
- skb_push(skb, size);
- memmove(skb->data, skb_network_header(skb), size);
+ __skb_push(skb, size);
skb_reset_network_header(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);
+ xfrm6_beet_make_header(skb);
+
ip6h = ipv6_hdr(skb);
ip6h->payload_len = htons(skb->len - size);
ipv6_addr_copy(&ip6h->daddr, (struct in6_addr *) &x->sel.daddr.a6);
@@ -75,8 +85,10 @@ out:
}
static struct xfrm_mode xfrm6_beet_mode = {
- .input = xfrm6_beet_input,
- .output = xfrm6_beet_output,
+ .input2 = xfrm6_beet_input,
+ .input = xfrm_prepare_input,
+ .output2 = xfrm6_beet_output,
+ .output = xfrm6_prepare_output,
.owner = THIS_MODULE,
.encap = XFRM_MODE_BEET,
.flags = XFRM_MODE_FLAG_TUNNEL,