#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;
+ return xfrm6_extract_header(skb);
+}
- skb->nh.raw[nhoff] = nexthdr;
+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 (x->props.replay_window)
- xfrm_replay_advance(x, seq);
+int xfrm6_transport_finish(struct sk_buff *skb, int async)
+{
+ skb_network_header(skb)[IP6CB(skb)->nhoff] =
+ XFRM_MODE_SKB_CB(skb)->protocol;
- x->curlft.bytes += skb->len;
- x->curlft.packets++;
+#ifndef CONFIG_NETFILTER
+ if (!async)
+ return 1;
+#endif
- spin_unlock(&x->lock);
+ ipv6_hdr(skb)->payload_len = htons(skb->len);
+ __skb_push(skb, skb->data - skb_network_header(skb));
- xfrm_vec[xfrm_nr++] = x;
+ NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, skb->dev, NULL,
+ ip6_rcv_finish);
+ return -1;
+}
- if (x->mode->input(x, skb))
- goto drop;
+int xfrm6_rcv(struct sk_buff *skb)
+{
+ return xfrm6_rcv_spi(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
+ 0);
+}
- if (x->props.mode) { /* XXX */
- decaps = 1;
- break;
- }
+EXPORT_SYMBOL(xfrm6_rcv);
- if ((err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) < 0)
- goto drop;
- } while (!err);
+int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
+ xfrm_address_t *saddr, u8 proto)
+{
+ struct net *net = dev_net(skb->dev);
+ struct xfrm_state *x = NULL;
+ 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)
+ if (!sp) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINERROR);
goto drop;
+ }
if (skb->sp)
secpath_put(skb->sp);
skb->sp = sp;
}
- if (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
+ if (1 + skb->sp->len == XFRM_MAX_DEPTH) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR);
goto drop;
+ }
- 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;
-
- nf_reset(skb);
+ for (i = 0; i < 3; i++) {
+ xfrm_address_t *dst, *src;
- if (decaps) {
- if (!(skb->dev->flags&IFF_LOOPBACK)) {
- dst_release(skb->dst);
- skb->dst = NULL;
+ switch (i) {
+ case 0:
+ dst = daddr;
+ src = saddr;
+ break;
+ case 1:
+ /* lookup state with wild-card source address */
+ dst = daddr;
+ src = (xfrm_address_t *)&in6addr_any;
+ break;
+ default:
+ /* lookup state with wild-card addresses */
+ dst = (xfrm_address_t *)&in6addr_any;
+ src = (xfrm_address_t *)&in6addr_any;
+ break;
}
- 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);
-
- NF_HOOK(PF_INET6, NF_IP6_PRE_ROUTING, skb, skb->dev, NULL,
- ip6_rcv_finish);
- return -1;
-#else
- return 1;
-#endif
+
+ x = xfrm_state_lookup_byaddr(net, dst, src, proto, AF_INET6);
+ if (!x)
+ continue;
+
+ spin_lock(&x->lock);
+
+ if ((!i || (x->props.flags & XFRM_STATE_WILDRECV)) &&
+ likely(x->km.state == XFRM_STATE_VALID) &&
+ !xfrm_state_check_expire(x)) {
+ spin_unlock(&x->lock);
+ if (x->type->input(x, skb) > 0) {
+ /* found a valid state */
+ break;
+ }
+ } else
+ spin_unlock(&x->lock);
+
+ xfrm_state_put(x);
+ x = NULL;
}
-drop_unlock:
+ if (!x) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOSTATES);
+ xfrm_audit_state_notfound_simple(skb, AF_INET6);
+ goto drop;
+ }
+
+ skb->sp->xvec[skb->sp->len++] = x;
+
+ spin_lock(&x->lock);
+
+ x->curlft.bytes += skb->len;
+ x->curlft.packets++;
+
spin_unlock(&x->lock);
- xfrm_state_put(x);
+
+ return 1;
+
drop:
- while (--xfrm_nr >= 0)
- xfrm_state_put(xfrm_vec[xfrm_nr]);
- kfree_skb(skb);
return -1;
}
-EXPORT_SYMBOL(xfrm6_rcv_spi);
-
-int xfrm6_rcv(struct sk_buff **pskb)
-{
- return xfrm6_rcv_spi(*pskb, 0);
-}
+EXPORT_SYMBOL(xfrm6_input_addr);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff