* Changes:
* YOSHIFUJI Hideaki @USAGI
* Split up af-specific portion
- *
+ *
*/
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <net/dst.h>
#include <net/ip.h>
#include <net/xfrm.h>
-static kmem_cache_t *secpath_cachep;
+static struct kmem_cache *secpath_cachep __read_mostly;
void __secpath_destroy(struct sec_path *sp)
{
int i;
for (i = 0; i < sp->len; i++)
- xfrm_state_put(sp->x[i].xvec);
+ xfrm_state_put(sp->xvec[i]);
kmem_cache_free(secpath_cachep, sp);
}
EXPORT_SYMBOL(__secpath_destroy);
{
struct sec_path *sp;
- sp = kmem_cache_alloc(secpath_cachep, SLAB_ATOMIC);
+ sp = kmem_cache_alloc(secpath_cachep, GFP_ATOMIC);
if (!sp)
return NULL;
memcpy(sp, src, sizeof(*sp));
for (i = 0; i < sp->len; i++)
- xfrm_state_hold(sp->x[i].xvec);
+ xfrm_state_hold(sp->xvec[i]);
}
atomic_set(&sp->refcnt, 1);
return sp;
/* Fetch spi and seq from ipsec header */
-int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq)
+int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq)
{
int offset, offset_seq;
+ int hlen;
switch (nexthdr) {
case IPPROTO_AH:
+ hlen = sizeof(struct ip_auth_hdr);
offset = offsetof(struct ip_auth_hdr, spi);
offset_seq = offsetof(struct ip_auth_hdr, seq_no);
break;
case IPPROTO_ESP:
+ hlen = sizeof(struct ip_esp_hdr);
offset = offsetof(struct ip_esp_hdr, spi);
offset_seq = offsetof(struct ip_esp_hdr, seq_no);
break;
case IPPROTO_COMP:
if (!pskb_may_pull(skb, sizeof(struct ip_comp_hdr)))
return -EINVAL;
- *spi = ntohl(ntohs(*(u16*)(skb->h.raw + 2)));
+ *spi = htonl(ntohs(*(__be16*)(skb_transport_header(skb) + 2)));
*seq = 0;
return 0;
default:
return 1;
}
- if (!pskb_may_pull(skb, 16))
+ if (!pskb_may_pull(skb, hlen))
return -EINVAL;
- *spi = *(u32*)(skb->h.raw + offset);
- *seq = *(u32*)(skb->h.raw + offset_seq);
+ *spi = *(__be32*)(skb_transport_header(skb) + offset);
+ *seq = *(__be32*)(skb_transport_header(skb) + offset_seq);
return 0;
}
-EXPORT_SYMBOL(xfrm_parse_spi);
+
+int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
+{
+ struct xfrm_mode *inner_mode = x->inner_mode;
+ int err;
+
+ err = x->outer_mode->afinfo->extract_input(x, skb);
+ if (err)
+ return err;
+
+ if (x->sel.family == AF_UNSPEC) {
+ inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
+ if (inner_mode == NULL)
+ return -EAFNOSUPPORT;
+ }
+
+ skb->protocol = inner_mode->afinfo->eth_proto;
+ return inner_mode->input2(x, skb);
+}
+EXPORT_SYMBOL(xfrm_prepare_input);
+
+int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
+{
+ struct net *net = dev_net(skb->dev);
+ int err;
+ __be32 seq;
+ struct xfrm_state *x;
+ xfrm_address_t *daddr;
+ struct xfrm_mode *inner_mode;
+ unsigned int family;
+ int decaps = 0;
+ int async = 0;
+
+ /* A negative encap_type indicates async resumption. */
+ if (encap_type < 0) {
+ async = 1;
+ x = xfrm_input_state(skb);
+ seq = XFRM_SKB_CB(skb)->seq.input;
+ goto resume;
+ }
+
+ /* 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(net, LINUX_MIB_XFRMINERROR);
+ goto drop;
+ }
+ if (skb->sp)
+ secpath_put(skb->sp);
+ skb->sp = sp;
+ }
+
+ daddr = (xfrm_address_t *)(skb_network_header(skb) +
+ XFRM_SPI_SKB_CB(skb)->daddroff);
+ family = XFRM_SPI_SKB_CB(skb)->family;
+
+ seq = 0;
+ if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR);
+ goto drop;
+ }
+
+ do {
+ if (skb->sp->len == XFRM_MAX_DEPTH) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR);
+ goto drop;
+ }
+
+ x = xfrm_state_lookup(net, daddr, spi, nexthdr, family);
+ if (x == NULL) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOSTATES);
+ xfrm_audit_state_notfound(skb, family, spi, seq);
+ goto drop;
+ }
+
+ skb->sp->xvec[skb->sp->len++] = x;
+
+ spin_lock(&x->lock);
+ if (unlikely(x->km.state != XFRM_STATE_VALID)) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEINVALID);
+ goto drop_unlock;
+ }
+
+ if ((x->encap ? x->encap->encap_type : 0) != encap_type) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMISMATCH);
+ goto drop_unlock;
+ }
+
+ if (x->props.replay_window && xfrm_replay_check(x, skb, seq)) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATESEQERROR);
+ goto drop_unlock;
+ }
+
+ if (xfrm_state_check_expire(x)) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEEXPIRED);
+ goto drop_unlock;
+ }
+
+ spin_unlock(&x->lock);
+
+ XFRM_SKB_CB(skb)->seq.input = seq;
+
+ nexthdr = x->type->input(x, skb);
+
+ if (nexthdr == -EINPROGRESS)
+ return 0;
+
+resume:
+ spin_lock(&x->lock);
+ if (nexthdr <= 0) {
+ if (nexthdr == -EBADMSG) {
+ xfrm_audit_state_icvfail(x, skb,
+ x->type->proto);
+ x->stats.integrity_failed++;
+ }
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEPROTOERROR);
+ goto drop_unlock;
+ }
+
+ /* 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_MODE_SKB_CB(skb)->protocol = nexthdr;
+
+ inner_mode = x->inner_mode;
+
+ if (x->sel.family == AF_UNSPEC) {
+ inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
+ if (inner_mode == NULL)
+ goto drop;
+ }
+
+ if (inner_mode->input(x, skb)) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMODEERROR);
+ goto drop;
+ }
+
+ if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) {
+ decaps = 1;
+ break;
+ }
+
+ /*
+ * We need the inner address. However, we only get here for
+ * transport mode so the outer address is identical.
+ */
+ daddr = &x->id.daddr;
+ family = x->outer_mode->afinfo->family;
+
+ err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
+ if (err < 0) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR);
+ goto drop;
+ }
+ } while (!err);
+
+ nf_reset(skb);
+
+ if (decaps) {
+ skb_dst_drop(skb);
+ netif_rx(skb);
+ return 0;
+ } else {
+ return x->inner_mode->afinfo->transport_finish(skb, async);
+ }
+
+drop_unlock:
+ spin_unlock(&x->lock);
+drop:
+ kfree_skb(skb);
+ return 0;
+}
+EXPORT_SYMBOL(xfrm_input);
+
+int xfrm_input_resume(struct sk_buff *skb, int nexthdr)
+{
+ return xfrm_input(skb, nexthdr, 0, -1);
+}
+EXPORT_SYMBOL(xfrm_input_resume);
void __init xfrm_input_init(void)
{
secpath_cachep = kmem_cache_create("secpath_cache",
sizeof(struct sec_path),
- 0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!secpath_cachep)
- panic("XFRM: failed to allocate secpath_cache\n");
+ 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC,
+ NULL);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff