#include <net/ipv6.h>
#include <net/xfrm.h>
-int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi)
+int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb)
{
- int err;
- u32 seq;
- struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
- struct xfrm_state *x;
- int xfrm_nr = 0;
- int decaps = 0;
- int nexthdr;
- unsigned int nhoff;
-
- nhoff = IP6CB(skb)->nhoff;
- nexthdr = skb->nh.raw[nhoff];
-
- seq = 0;
- if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
- goto drop;
-
- do {
- struct ipv6hdr *iph = skb->nh.ipv6h;
-
- if (xfrm_nr == XFRM_MAX_DEPTH)
- goto drop;
-
- x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, spi, nexthdr, AF_INET6);
- if (x == NULL)
- goto drop;
- spin_lock(&x->lock);
- if (unlikely(x->km.state != XFRM_STATE_VALID))
- 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;
-
- nexthdr = x->type->input(x, skb);
- if (nexthdr <= 0)
- goto drop_unlock;
-
- skb->nh.raw[nhoff] = nexthdr;
-
- if (x->props.replay_window)
- xfrm_replay_advance(x, seq);
-
- x->curlft.bytes += skb->len;
- x->curlft.packets++;
-
- spin_unlock(&x->lock);
-
- xfrm_vec[xfrm_nr++] = x;
-
- if (x->mode->input(x, skb))
- goto drop;
-
- if (x->props.mode == XFRM_MODE_TUNNEL) { /* XXX */
- decaps = 1;
- break;
- }
-
- if ((err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) < 0)
- goto drop;
- } while (!err);
-
- /* Allocate new secpath or COW existing one. */
- if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
- struct sec_path *sp;
- sp = secpath_dup(skb->sp);
- if (!sp)
- goto drop;
- if (skb->sp)
- secpath_put(skb->sp);
- skb->sp = sp;
- }
-
- if (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
- goto drop;
+ return xfrm6_extract_header(skb);
+}
- memcpy(skb->sp->xvec + skb->sp->len, xfrm_vec,
- xfrm_nr * sizeof(xfrm_vec[0]));
- skb->sp->len += xfrm_nr;
- skb->ip_summed = CHECKSUM_NONE;
+int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
+{
+ XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
+ return xfrm_input(skb, nexthdr, spi, 0);
+}
+EXPORT_SYMBOL(xfrm6_rcv_spi);
- nf_reset(skb);
+int xfrm6_transport_finish(struct sk_buff *skb, int async)
+{
+ skb_network_header(skb)[IP6CB(skb)->nhoff] =
+ XFRM_MODE_SKB_CB(skb)->protocol;
- if (decaps) {
- if (!(skb->dev->flags&IFF_LOOPBACK)) {
- dst_release(skb->dst);
- skb->dst = NULL;
- }
- netif_rx(skb);
- return -1;
- } else {
#ifdef CONFIG_NETFILTER
- skb->nh.ipv6h->payload_len = htons(skb->len);
- __skb_push(skb, skb->data - skb->nh.raw);
+ ipv6_hdr(skb)->payload_len = htons(skb->len);
+ __skb_push(skb, skb->data - skb_network_header(skb));
- NF_HOOK(PF_INET6, NF_IP6_PRE_ROUTING, skb, skb->dev, NULL,
- ip6_rcv_finish);
- return -1;
+ NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, skb->dev, NULL,
+ ip6_rcv_finish);
+ return -1;
#else
- return 1;
-#endif
- }
+ if (async)
+ return ip6_rcv_finish(skb);
-drop_unlock:
- spin_unlock(&x->lock);
- xfrm_state_put(x);
-drop:
- while (--xfrm_nr >= 0)
- xfrm_state_put(xfrm_vec[xfrm_nr]);
- kfree_skb(skb);
- return -1;
+ return 1;
+#endif
}
-EXPORT_SYMBOL(xfrm6_rcv_spi);
-
-int xfrm6_rcv(struct sk_buff **pskb)
+int xfrm6_rcv(struct sk_buff *skb)
{
- return xfrm6_rcv_spi(*pskb, 0);
+ return xfrm6_rcv_spi(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
+ 0);
}
+EXPORT_SYMBOL(xfrm6_rcv);
+
int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
xfrm_address_t *saddr, u8 proto)
{
- struct xfrm_state *x = NULL;
- int wildcard = 0;
- struct in6_addr any;
+ struct xfrm_state *x = NULL;
+ int wildcard = 0;
xfrm_address_t *xany;
struct xfrm_state *xfrm_vec_one = NULL;
- int nh = 0;
+ int nh = 0;
int i = 0;
- ipv6_addr_set(&any, 0, 0, 0, 0);
- xany = (xfrm_address_t *)&any;
+ xany = (xfrm_address_t *)&in6addr_any;
for (i = 0; i < 3; i++) {
xfrm_address_t *dst, *src;
break;
case 2:
default:
- /* lookup state with wild-card addresses */
+ /* lookup state with wild-card addresses */
wildcard = 1; /* XXX */
dst = xany;
src = xany;
break;
- }
+ }
x = xfrm_state_lookup_byaddr(dst, src, proto, AF_INET6);
if (!x)
if (unlikely(x->km.state != XFRM_STATE_VALID)) {
spin_unlock(&x->lock);
xfrm_state_put(x);
- x = NULL;
- continue;
+ x = NULL;
+ continue;
}
if (xfrm_state_check_expire(x)) {
spin_unlock(&x->lock);
xfrm_state_put(xfrm_vec_one);
return -1;
}
+
+EXPORT_SYMBOL(xfrm6_input_addr);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff