* IPv6 support
*/
+#include <linux/module.h>
#include <linux/string.h>
-#include <net/inet_ecn.h>
-#include <net/ip.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
#include <net/ipv6.h>
#include <net/xfrm.h>
-static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
+int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi)
{
- struct ipv6hdr *outer_iph = skb->nh.ipv6h;
- struct ipv6hdr *inner_iph = skb->h.ipv6h;
-
- if (INET_ECN_is_ce(ip6_get_dsfield(outer_iph)) &&
- INET_ECN_is_not_ce(ip6_get_dsfield(inner_iph)))
- IP6_ECN_set_ce(inner_iph);
-}
-
-int xfrm6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
-{
- struct sk_buff *skb = *pskb;
int err;
- u32 spi, seq;
- struct sec_decap_state xfrm_vec[XFRM_MAX_DEPTH];
+ __be32 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 = *nhoffp;
+ nhoff = IP6CB(skb)->nhoff;
nexthdr = skb->nh.raw[nhoff];
- if ((err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
+ seq = 0;
+ if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
goto drop;
do {
if (xfrm_state_check_expire(x))
goto drop_unlock;
- nexthdr = x->type->input(x, &(xfrm_vec[xfrm_nr].decap), skb);
+ nexthdr = x->type->input(x, skb);
if (nexthdr <= 0)
goto drop_unlock;
spin_unlock(&x->lock);
- xfrm_vec[xfrm_nr++].xvec = x;
-
- if (x->props.mode) { /* XXX */
- if (nexthdr != IPPROTO_IPV6)
- goto drop;
- if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
- goto drop;
- if (skb_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
- goto drop;
- if (!(x->props.flags & XFRM_STATE_NOECN))
- ipip6_ecn_decapsulate(skb);
- skb->mac.raw = memmove(skb->data - skb->mac_len,
- skb->mac.raw, skb->mac_len);
- skb->nh.raw = skb->data;
+ 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 (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
goto drop;
- memcpy(skb->sp->x+skb->sp->len, xfrm_vec, xfrm_nr*sizeof(struct sec_decap_state));
+ 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);
+
if (decaps) {
if (!(skb->dev->flags&IFF_LOOPBACK)) {
dst_release(skb->dst);
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
}
drop_unlock:
xfrm_state_put(x);
drop:
while (--xfrm_nr >= 0)
- xfrm_state_put(xfrm_vec[xfrm_nr].xvec);
+ 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);
+}
+
+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;
+ xfrm_address_t *xany;
+ struct xfrm_state *xfrm_vec_one = NULL;
+ int nh = 0;
+ int i = 0;
+
+ ipv6_addr_set(&any, 0, 0, 0, 0);
+ xany = (xfrm_address_t *)&any;
+
+ for (i = 0; i < 3; i++) {
+ xfrm_address_t *dst, *src;
+ switch (i) {
+ case 0:
+ dst = daddr;
+ src = saddr;
+ break;
+ case 1:
+ /* lookup state with wild-card source address */
+ wildcard = 1;
+ dst = daddr;
+ src = xany;
+ break;
+ case 2:
+ default:
+ /* 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)
+ continue;
+
+ spin_lock(&x->lock);
+
+ if (wildcard) {
+ if ((x->props.flags & XFRM_STATE_WILDRECV) == 0) {
+ spin_unlock(&x->lock);
+ xfrm_state_put(x);
+ x = NULL;
+ continue;
+ }
+ }
+
+ if (unlikely(x->km.state != XFRM_STATE_VALID)) {
+ spin_unlock(&x->lock);
+ xfrm_state_put(x);
+ x = NULL;
+ continue;
+ }
+ if (xfrm_state_check_expire(x)) {
+ spin_unlock(&x->lock);
+ xfrm_state_put(x);
+ x = NULL;
+ continue;
+ }
+
+ 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;
+ break;
+ }
+
+ if (!xfrm_vec_one)
+ 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] = xfrm_vec_one;
+ skb->sp->len ++;
+
+ return 1;
+drop:
+ if (xfrm_vec_one)
+ xfrm_state_put(xfrm_vec_one);
+ return -1;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff