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Diffstat (limited to 'net/ipv6/xfrm6_input.c')
-rw-r--r--net/ipv6/xfrm6_input.c183
1 files changed, 54 insertions, 129 deletions
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index 515783707e8..a4714d76ae6 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -16,120 +16,37 @@
#include <net/ipv6.h>
#include <net/xfrm.h>
-int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
+int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb)
{
- 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;
-
- nhoff = IP6CB(skb)->nhoff;
-
- seq = 0;
- if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
- goto drop;
-
- do {
- struct ipv6hdr *iph = ipv6_hdr(skb);
-
- 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_network_header(skb)[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->outer_mode->input(x, skb))
- goto drop;
-
- if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) {
- decaps = 1;
- break;
- }
-
- if ((err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) < 0)
- goto drop;
- } while (!err);
+ return xfrm6_extract_header(skb);
+}
- /* 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;
- }
+int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
+{
+ XFRM_SPI_SKB_CB(skb)->family = AF_INET6;
+ XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
+ return xfrm_input(skb, nexthdr, spi, 0);
+}
+EXPORT_SYMBOL(xfrm6_rcv_spi);
- if (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
- goto drop;
+int xfrm6_transport_finish(struct sk_buff *skb, int async)
+{
+ skb_network_header(skb)[IP6CB(skb)->nhoff] =
+ XFRM_MODE_SKB_CB(skb)->protocol;
- 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) {
- dst_release(skb->dst);
- skb->dst = NULL;
- netif_rx(skb);
- return -1;
- } else {
-#ifdef CONFIG_NETFILTER
- 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;
-#else
+#ifndef CONFIG_NETFILTER
+ if (!async)
return 1;
#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);
+ ipv6_hdr(skb)->payload_len = htons(skb->len);
+ __skb_push(skb, skb->data - skb_network_header(skb));
+
+ NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, skb->dev, NULL,
+ ip6_rcv_finish);
return -1;
}
-EXPORT_SYMBOL(xfrm6_rcv_spi);
-
int xfrm6_rcv(struct sk_buff *skb)
{
return xfrm6_rcv_spi(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
@@ -144,10 +61,28 @@ int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
struct xfrm_state *x = NULL;
int wildcard = 0;
xfrm_address_t *xany;
- struct xfrm_state *xfrm_vec_one = NULL;
int nh = 0;
int i = 0;
+ /* 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) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINERROR);
+ goto drop;
+ }
+ if (skb->sp)
+ secpath_put(skb->sp);
+ skb->sp = sp;
+ }
+
+ if (1 + skb->sp->len == XFRM_MAX_DEPTH) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINBUFFERERROR);
+ goto drop;
+ }
+
xany = (xfrm_address_t *)&in6addr_any;
for (i = 0; i < 3; i++) {
@@ -200,47 +135,37 @@ int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
continue;
}
+ spin_unlock(&x->lock);
+
nh = x->type->input(x, skb);
if (nh <= 0) {
- spin_unlock(&x->lock);
xfrm_state_put(x);
x = NULL;
continue;
}
- x->curlft.bytes += skb->len;
- x->curlft.packets++;
-
- spin_unlock(&x->lock);
-
- xfrm_vec_one = x;
+ /* Found a state */
break;
}
- if (!xfrm_vec_one)
+ if (!x) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINNOSTATES);
+ xfrm_audit_state_notfound_simple(skb, AF_INET6);
goto drop;
-
- /* 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 (1 + skb->sp->len > XFRM_MAX_DEPTH)
- goto drop;
+ skb->sp->xvec[skb->sp->len++] = x;
+
+ spin_lock(&x->lock);
- skb->sp->xvec[skb->sp->len] = xfrm_vec_one;
- skb->sp->len ++;
+ x->curlft.bytes += skb->len;
+ x->curlft.packets++;
+
+ spin_unlock(&x->lock);
return 1;
+
drop:
- if (xfrm_vec_one)
- xfrm_state_put(xfrm_vec_one);
return -1;
}