*
*/
-#include <linux/config.h>
+#include <linux/compiler.h>
+#include <linux/netdevice.h>
+#include <net/addrconf.h>
#include <net/xfrm.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
+#ifdef CONFIG_IPV6_MIP6
+#include <net/mip6.h>
+#endif
-extern struct dst_ops xfrm6_dst_ops;
-extern struct xfrm_policy_afinfo xfrm6_policy_afinfo;
+static struct dst_ops xfrm6_dst_ops;
+static struct xfrm_policy_afinfo xfrm6_policy_afinfo;
-static struct xfrm_type_map xfrm6_type_map = { .lock = RW_LOCK_UNLOCKED };
-
-int xfrm6_dst_lookup(struct xfrm_dst **dst, struct flowi *fl)
+static int xfrm6_dst_lookup(struct xfrm_dst **xdst, struct flowi *fl)
{
- int err = 0;
- *dst = (struct xfrm_dst*)ip6_route_output(NULL, fl);
- if (!*dst)
- err = -ENETUNREACH;
+ struct dst_entry *dst = ip6_route_output(NULL, fl);
+ int err = dst->error;
+ if (!err)
+ *xdst = (struct xfrm_dst *) dst;
+ else
+ dst_release(dst);
return err;
}
-/* Check that the bundle accepts the flow and its components are
- * still valid.
- */
-
-static int __xfrm6_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl)
+static int xfrm6_get_saddr(xfrm_address_t *saddr, xfrm_address_t *daddr)
{
- do {
- if (xdst->u.dst.ops != &xfrm6_dst_ops)
- return 1;
-
- if (!xfrm_selector_match(&xdst->u.dst.xfrm->sel, fl, AF_INET6))
- return 0;
- if (xdst->u.dst.xfrm->km.state != XFRM_STATE_VALID ||
- xdst->u.dst.path->obsolete > 0)
- return 0;
- xdst = (struct xfrm_dst*)xdst->u.dst.child;
- } while (xdst);
- return 0;
+ struct rt6_info *rt;
+ struct flowi fl_tunnel = {
+ .nl_u = {
+ .ip6_u = {
+ .daddr = *(struct in6_addr *)&daddr->a6,
+ },
+ },
+ };
+
+ if (!xfrm6_dst_lookup((struct xfrm_dst **)&rt, &fl_tunnel)) {
+ ipv6_get_saddr(&rt->u.dst, (struct in6_addr *)&daddr->a6,
+ (struct in6_addr *)&saddr->a6);
+ dst_release(&rt->u.dst);
+ return 0;
+ }
+ return -EHOSTUNREACH;
}
static struct dst_entry *
ipv6_addr_prefix(&fl_src_prefix,
&fl->fl6_src,
xdst->u.rt6.rt6i_src.plen);
- if (!ipv6_addr_cmp(&xdst->u.rt6.rt6i_dst.addr, &fl_dst_prefix) &&
- !ipv6_addr_cmp(&xdst->u.rt6.rt6i_src.addr, &fl_src_prefix) &&
- __xfrm6_bundle_ok(xdst, fl)) {
+ if (ipv6_addr_equal(&xdst->u.rt6.rt6i_dst.addr, &fl_dst_prefix) &&
+ ipv6_addr_equal(&xdst->u.rt6.rt6i_src.addr, &fl_src_prefix) &&
+ xfrm_bundle_ok(policy, xdst, fl, AF_INET6,
+ (xdst->u.rt6.rt6i_dst.plen != 128 ||
+ xdst->u.rt6.rt6i_src.plen != 128))) {
dst_clone(dst);
break;
}
return dst;
}
+static inline struct in6_addr*
+__xfrm6_bundle_addr_remote(struct xfrm_state *x, struct in6_addr *addr)
+{
+ return (x->type->remote_addr) ?
+ (struct in6_addr*)x->type->remote_addr(x, (xfrm_address_t *)addr) :
+ (struct in6_addr*)&x->id.daddr;
+}
+
+static inline struct in6_addr*
+__xfrm6_bundle_addr_local(struct xfrm_state *x, struct in6_addr *addr)
+{
+ return (x->type->local_addr) ?
+ (struct in6_addr*)x->type->local_addr(x, (xfrm_address_t *)addr) :
+ (struct in6_addr*)&x->props.saddr;
+}
+
+static inline void
+__xfrm6_bundle_len_inc(int *len, int *nflen, struct xfrm_state *x)
+{
+ if (x->type->flags & XFRM_TYPE_NON_FRAGMENT)
+ *nflen += x->props.header_len;
+ else
+ *len += x->props.header_len;
+}
+
+static inline void
+__xfrm6_bundle_len_dec(int *len, int *nflen, struct xfrm_state *x)
+{
+ if (x->type->flags & XFRM_TYPE_NON_FRAGMENT)
+ *nflen -= x->props.header_len;
+ else
+ *len -= x->props.header_len;
+}
+
/* Allocate chain of dst_entry's, attach known xfrm's, calculate
* all the metrics... Shortly, bundle a bundle.
*/
struct rt6_info *rt = rt0;
struct in6_addr *remote = &fl->fl6_dst;
struct in6_addr *local = &fl->fl6_src;
+ struct flowi fl_tunnel = {
+ .nl_u = {
+ .ip6_u = {
+ .saddr = *local,
+ .daddr = *remote
+ }
+ }
+ };
int i;
int err = 0;
int header_len = 0;
+ int nfheader_len = 0;
int trailer_len = 0;
dst = dst_prev = NULL;
+ dst_hold(&rt->u.dst);
for (i = 0; i < nx; i++) {
struct dst_entry *dst1 = dst_alloc(&xfrm6_dst_ops);
+ struct xfrm_dst *xdst;
+ int tunnel = 0;
if (unlikely(dst1 == NULL)) {
err = -ENOBUFS;
+ dst_release(&rt->u.dst);
goto error;
}
dst1->flags |= DST_NOHASH;
dst_clone(dst1);
}
+
+ xdst = (struct xfrm_dst *)dst1;
+ xdst->route = &rt->u.dst;
+ xdst->genid = xfrm[i]->genid;
+ if (rt->rt6i_node)
+ xdst->route_cookie = rt->rt6i_node->fn_sernum;
+
+ dst1->next = dst_prev;
dst_prev = dst1;
- if (xfrm[i]->props.mode) {
- remote = (struct in6_addr*)&xfrm[i]->id.daddr;
- local = (struct in6_addr*)&xfrm[i]->props.saddr;
+ if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
+ remote = __xfrm6_bundle_addr_remote(xfrm[i], remote);
+ local = __xfrm6_bundle_addr_local(xfrm[i], local);
+ tunnel = 1;
}
- header_len += xfrm[i]->props.header_len;
+ __xfrm6_bundle_len_inc(&header_len, &nfheader_len, xfrm[i]);
trailer_len += xfrm[i]->props.trailer_len;
+
+ if (tunnel) {
+ ipv6_addr_copy(&fl_tunnel.fl6_dst, remote);
+ ipv6_addr_copy(&fl_tunnel.fl6_src, local);
+ err = xfrm_dst_lookup((struct xfrm_dst **) &rt,
+ &fl_tunnel, AF_INET6);
+ if (err)
+ goto error;
+ } else
+ dst_hold(&rt->u.dst);
}
- if (ipv6_addr_cmp(remote, &fl->fl6_dst)) {
- struct flowi fl_tunnel;
+ dst_prev->child = &rt->u.dst;
+ dst->path = &rt->u.dst;
+ if (rt->rt6i_node)
+ ((struct xfrm_dst *)dst)->path_cookie = rt->rt6i_node->fn_sernum;
- memset(&fl_tunnel, 0, sizeof(fl_tunnel));
- ipv6_addr_copy(&fl_tunnel.fl6_dst, remote);
- ipv6_addr_copy(&fl_tunnel.fl6_src, local);
+ *dst_p = dst;
+ dst = dst_prev;
- err = xfrm_dst_lookup((struct xfrm_dst **) &rt,
- &fl_tunnel, AF_INET6);
- if (err)
- goto error;
- } else {
- dst_hold(&rt->u.dst);
- }
- dst_prev->child = &rt->u.dst;
+ dst_prev = *dst_p;
i = 0;
- for (dst_prev = dst; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
+ for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
struct xfrm_dst *x = (struct xfrm_dst*)dst_prev;
dst_prev->xfrm = xfrm[i++];
dst_prev->flags |= DST_HOST;
dst_prev->lastuse = jiffies;
dst_prev->header_len = header_len;
+ dst_prev->nfheader_len = nfheader_len;
dst_prev->trailer_len = trailer_len;
- memcpy(&dst_prev->metrics, &rt->u.dst.metrics, sizeof(dst_prev->metrics));
- dst_prev->path = &rt->u.dst;
+ memcpy(&dst_prev->metrics, &x->route->metrics, sizeof(dst_prev->metrics));
/* Copy neighbour for reachability confirmation */
dst_prev->neighbour = neigh_clone(rt->u.dst.neighbour);
memcpy(&x->u.rt6.rt6i_gateway, &rt0->rt6i_gateway, sizeof(x->u.rt6.rt6i_gateway));
x->u.rt6.rt6i_dst = rt0->rt6i_dst;
x->u.rt6.rt6i_src = rt0->rt6i_src;
- header_len -= x->u.dst.xfrm->props.header_len;
+ x->u.rt6.rt6i_idev = rt0->rt6i_idev;
+ in6_dev_hold(rt0->rt6i_idev);
+ __xfrm6_bundle_len_dec(&header_len, &nfheader_len, x->u.dst.xfrm);
trailer_len -= x->u.dst.xfrm->props.trailer_len;
}
- *dst_p = dst;
+
+ xfrm_init_pmtu(dst);
return 0;
error:
static inline void
_decode_session6(struct sk_buff *skb, struct flowi *fl)
{
- u16 offset = sizeof(struct ipv6hdr);
+ u16 offset = skb->h.raw - skb->nh.raw;
struct ipv6hdr *hdr = skb->nh.ipv6h;
- struct ipv6_opt_hdr *exthdr = (struct ipv6_opt_hdr*)(skb->nh.raw + offset);
- u8 nexthdr = skb->nh.ipv6h->nexthdr;
+ struct ipv6_opt_hdr *exthdr;
+ u8 nexthdr = skb->nh.raw[IP6CB(skb)->nhoff];
memset(fl, 0, sizeof(struct flowi));
ipv6_addr_copy(&fl->fl6_dst, &hdr->daddr);
ipv6_addr_copy(&fl->fl6_src, &hdr->saddr);
while (pskb_may_pull(skb, skb->nh.raw + offset + 1 - skb->data)) {
+ exthdr = (struct ipv6_opt_hdr*)(skb->nh.raw + offset);
+
switch (nexthdr) {
case NEXTHDR_ROUTING:
case NEXTHDR_HOP:
break;
case IPPROTO_UDP:
+ case IPPROTO_UDPLITE:
case IPPROTO_TCP:
case IPPROTO_SCTP:
+ case IPPROTO_DCCP:
if (pskb_may_pull(skb, skb->nh.raw + offset + 4 - skb->data)) {
- u16 *ports = (u16 *)exthdr;
+ __be16 *ports = (__be16 *)exthdr;
fl->fl_ip_sport = ports[0];
fl->fl_ip_dport = ports[1];
fl->proto = nexthdr;
return;
+ case IPPROTO_ICMPV6:
+ if (pskb_may_pull(skb, skb->nh.raw + offset + 2 - skb->data)) {
+ u8 *icmp = (u8 *)exthdr;
+
+ fl->fl_icmp_type = icmp[0];
+ fl->fl_icmp_code = icmp[1];
+ }
+ fl->proto = nexthdr;
+ return;
+
+#ifdef CONFIG_IPV6_MIP6
+ case IPPROTO_MH:
+ if (pskb_may_pull(skb, skb->nh.raw + offset + 3 - skb->data)) {
+ struct ip6_mh *mh;
+ mh = (struct ip6_mh *)exthdr;
+
+ fl->fl_mh_type = mh->ip6mh_type;
+ }
+ fl->proto = nexthdr;
+ return;
+#endif
+
/* XXX Why are there these headers? */
case IPPROTO_AH:
case IPPROTO_ESP:
static inline int xfrm6_garbage_collect(void)
{
- read_lock(&xfrm6_policy_afinfo.lock);
xfrm6_policy_afinfo.garbage_collect();
- read_unlock(&xfrm6_policy_afinfo.lock);
return (atomic_read(&xfrm6_dst_ops.entries) > xfrm6_dst_ops.gc_thresh*2);
}
static void xfrm6_update_pmtu(struct dst_entry *dst, u32 mtu)
{
- struct dst_entry *path = dst->path;
+ struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
+ struct dst_entry *path = xdst->route;
+
+ path->ops->update_pmtu(path, mtu);
+}
+
+static void xfrm6_dst_destroy(struct dst_entry *dst)
+{
+ struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
+
+ if (likely(xdst->u.rt6.rt6i_idev))
+ in6_dev_put(xdst->u.rt6.rt6i_idev);
+ xfrm_dst_destroy(xdst);
+}
+
+static void xfrm6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
+ int unregister)
+{
+ struct xfrm_dst *xdst;
+
+ if (!unregister)
+ return;
+
+ xdst = (struct xfrm_dst *)dst;
+ if (xdst->u.rt6.rt6i_idev->dev == dev) {
+ struct inet6_dev *loopback_idev = in6_dev_get(&loopback_dev);
+ BUG_ON(!loopback_idev);
+
+ do {
+ in6_dev_put(xdst->u.rt6.rt6i_idev);
+ xdst->u.rt6.rt6i_idev = loopback_idev;
+ in6_dev_hold(loopback_idev);
+ xdst = (struct xfrm_dst *)xdst->u.dst.child;
+ } while (xdst->u.dst.xfrm);
+
+ __in6_dev_put(loopback_idev);
+ }
- if (mtu >= IPV6_MIN_MTU && mtu < dst_pmtu(dst))
- path->ops->update_pmtu(path, mtu);
-
- return;
+ xfrm_dst_ifdown(dst, dev);
}
-struct dst_ops xfrm6_dst_ops = {
+static struct dst_ops xfrm6_dst_ops = {
.family = AF_INET6,
.protocol = __constant_htons(ETH_P_IPV6),
.gc = xfrm6_garbage_collect,
.update_pmtu = xfrm6_update_pmtu,
+ .destroy = xfrm6_dst_destroy,
+ .ifdown = xfrm6_dst_ifdown,
.gc_thresh = 1024,
.entry_size = sizeof(struct xfrm_dst),
};
-struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
+static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
.family = AF_INET6,
- .lock = RW_LOCK_UNLOCKED,
- .type_map = &xfrm6_type_map,
.dst_ops = &xfrm6_dst_ops,
.dst_lookup = xfrm6_dst_lookup,
+ .get_saddr = xfrm6_get_saddr,
.find_bundle = __xfrm6_find_bundle,
.bundle_create = __xfrm6_bundle_create,
.decode_session = _decode_session6,
};
-void __init xfrm6_policy_init(void)
+static void __init xfrm6_policy_init(void)
{
xfrm_policy_register_afinfo(&xfrm6_policy_afinfo);
}
-void __exit xfrm6_policy_fini(void)
+static void xfrm6_policy_fini(void)
{
xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo);
}
{
xfrm6_policy_init();
xfrm6_state_init();
- xfrm6_tunnel_init();
}
-void __exit xfrm6_fini(void)
+void xfrm6_fini(void)
{
- xfrm6_tunnel_fini();
//xfrm6_input_fini();
xfrm6_policy_fini();
xfrm6_state_fini();
git://git.onelab.eu / linux-2.6.git / blobdiff