summaryrefslogtreecommitdiff
path: root/net/ipv4/xfrm4_input.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/xfrm4_input.c')
-rw-r--r--net/ipv4/xfrm4_input.c126
1 files changed, 14 insertions, 112 deletions
diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index c0323d05ab69..e374903dacdf 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -41,124 +41,26 @@ drop:
int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
int encap_type)
{
- int err;
- __be32 seq;
- struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
- struct xfrm_state *x;
- int xfrm_nr = 0;
- int decaps = 0;
- unsigned int nhoff = offsetof(struct iphdr, protocol);
-
- seq = 0;
- if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
- goto drop;
-
- do {
- const struct iphdr *iph = ip_hdr(skb);
-
- if (xfrm_nr == XFRM_MAX_DEPTH)
- goto drop;
-
- x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, spi,
- nexthdr, AF_INET);
- if (x == NULL)
- goto drop;
-
- spin_lock(&x->lock);
- 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;
-
- nexthdr = x->type->input(x, skb);
- if (nexthdr <= 0)
- goto drop_unlock;
-
- skb_network_header(skb)[nhoff] = nexthdr;
-
- /* only the first xfrm gets the encap type */
- encap_type = 0;
-
- 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->inner_mode->input(x, skb))
- goto drop;
-
- if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) {
- decaps = 1;
- break;
- }
-
- err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
- if (err < 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;
-
- memcpy(skb->sp->xvec + skb->sp->len, xfrm_vec,
- xfrm_nr * sizeof(xfrm_vec[0]));
- skb->sp->len += xfrm_nr;
-
- nf_reset(skb);
+ XFRM_SPI_SKB_CB(skb)->nhoff = offsetof(struct iphdr, protocol);
+ XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
+ return xfrm_input(skb, nexthdr, spi, encap_type);
+}
+EXPORT_SYMBOL(xfrm4_rcv_encap);
- if (decaps) {
- dst_release(skb->dst);
- skb->dst = NULL;
- netif_rx(skb);
- return 0;
- } else {
+int xfrm4_transport_finish(struct sk_buff *skb, int async)
+{
#ifdef CONFIG_NETFILTER
- __skb_push(skb, skb->data - skb_network_header(skb));
- ip_hdr(skb)->tot_len = htons(skb->len);
- ip_send_check(ip_hdr(skb));
+ __skb_push(skb, skb->data - skb_network_header(skb));
+ ip_hdr(skb)->tot_len = htons(skb->len);
+ ip_send_check(ip_hdr(skb));
- NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
- xfrm4_rcv_encap_finish);
- return 0;
+ NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
+ xfrm4_rcv_encap_finish);
+ return 0;
#else
- return -ip_hdr(skb)->protocol;
+ return -ip_hdr(skb)->protocol;
#endif
- }
-
-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 0;
}
-EXPORT_SYMBOL(xfrm4_rcv_encap);
/* If it's a keepalive packet, then just eat it.
* If it's an encapsulated packet, then pass it to the