#include <linux/config.h>
#include <linux/module.h>
+#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/sockios.h>
#include <net/ip.h>
#include <net/ipv6.h>
-#include <net/protocol.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/ip6_tunnel.h>
#include <net/xfrm.h>
+#include <net/dsfield.h>
+#include <net/inet_ecn.h>
MODULE_AUTHOR("Ville Nuorvala");
MODULE_DESCRIPTION("IPv6-in-IPv6 tunnel");
static struct ip6_tnl **tnls[2] = { tnls_wc, tnls_r_l };
/* lock for the tunnel lists */
-static rwlock_t ip6ip6_lock = RW_LOCK_UNLOCKED;
+static DEFINE_RWLOCK(ip6ip6_lock);
static inline struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t)
{
if (dst && dst->obsolete &&
dst->ops->check(dst, t->dst_cookie) == NULL) {
t->dst_cache = NULL;
+ dst_release(dst);
return NULL;
}
* else %NULL
**/
-struct ip6_tnl *
+static struct ip6_tnl *
ip6ip6_tnl_lookup(struct in6_addr *remote, struct in6_addr *local)
{
unsigned h0 = HASH(remote);
struct ip6_tnl *t;
for (t = tnls_r_l[h0 ^ h1]; t; t = t->next) {
- if (!ipv6_addr_cmp(local, &t->parms.laddr) &&
- !ipv6_addr_cmp(remote, &t->parms.raddr) &&
+ if (ipv6_addr_equal(local, &t->parms.laddr) &&
+ ipv6_addr_equal(remote, &t->parms.raddr) &&
(t->dev->flags & IFF_UP))
return t;
}
{
struct ip6_tnl **tp = ip6ip6_bucket(&t->parms);
- write_lock_bh(&ip6ip6_lock);
t->next = *tp;
- write_unlock_bh(&ip6ip6_lock);
+ write_lock_bh(&ip6ip6_lock);
*tp = t;
+ write_unlock_bh(&ip6ip6_lock);
}
/**
if (dev == NULL)
return -ENOMEM;
- t = dev->priv;
+ t = netdev_priv(dev);
dev->init = ip6ip6_tnl_dev_init;
t->parms = *p;
return -EINVAL;
for (t = *ip6ip6_bucket(p); t; t = t->next) {
- if (!ipv6_addr_cmp(local, &t->parms.laddr) &&
- !ipv6_addr_cmp(remote, &t->parms.raddr)) {
+ if (ipv6_addr_equal(local, &t->parms.laddr) &&
+ ipv6_addr_equal(remote, &t->parms.raddr)) {
*pt = t;
return (create ? -EEXIST : 0);
}
static void
ip6ip6_tnl_dev_uninit(struct net_device *dev)
{
- struct ip6_tnl *t = dev->priv;
+ struct ip6_tnl *t = netdev_priv(dev);
if (dev == ip6ip6_fb_tnl_dev) {
write_lock_bh(&ip6ip6_lock);
* to the specifications in RFC 2473.
**/
-void ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __u32 info)
+static int
+ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+ int type, int code, int offset, __u32 info)
{
struct ipv6hdr *ipv6h = (struct ipv6hdr *) skb->data;
struct ip6_tnl *t;
int rel_code = ICMPV6_ADDR_UNREACH;
__u32 rel_info = 0;
__u16 len;
+ int err = -ENOENT;
/* If the packet doesn't contain the original IPv6 header we are
in trouble since we might need the source address for further
if ((t = ip6ip6_tnl_lookup(&ipv6h->daddr, &ipv6h->saddr)) == NULL)
goto out;
+ err = 0;
+
switch (type) {
__u32 teli;
struct ipv6_tlv_tnl_enc_lim *tel;
mtu = IPV6_MIN_MTU;
t->dev->mtu = mtu;
- if ((len = sizeof (*ipv6h) + ipv6h->payload_len) > mtu) {
+ if ((len = sizeof (*ipv6h) + ntohs(ipv6h->payload_len)) > mtu) {
rel_type = ICMPV6_PKT_TOOBIG;
rel_code = 0;
rel_info = mtu;
}
out:
read_unlock(&ip6ip6_lock);
+ return err;
+}
+
+static inline void ip6ip6_ecn_decapsulate(struct ipv6hdr *outer_iph,
+ struct sk_buff *skb)
+{
+ struct ipv6hdr *inner_iph = skb->nh.ipv6h;
+
+ if (INET_ECN_is_ce(ipv6_get_dsfield(outer_iph)))
+ IP6_ECN_set_ce(inner_iph);
}
/**
* Return: 0
**/
-int ip6ip6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
+static int
+ip6ip6_rcv(struct sk_buff *skb)
{
- struct sk_buff *skb = *pskb;
struct ipv6hdr *ipv6h;
struct ip6_tnl *t;
- if (!pskb_may_pull(skb, sizeof (*ipv6h)))
- goto discard;
-
ipv6h = skb->nh.ipv6h;
read_lock(&ip6ip6_lock);
if ((t = ip6ip6_tnl_lookup(&ipv6h->saddr, &ipv6h->daddr)) != NULL) {
+ if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+ read_unlock(&ip6ip6_lock);
+ goto discard;
+ }
+
if (!(t->parms.flags & IP6_TNL_F_CAP_RCV)) {
t->stat.rx_dropped++;
read_unlock(&ip6ip6_lock);
skb->dev = t->dev;
dst_release(skb->dst);
skb->dst = NULL;
+ if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
+ ipv6_copy_dscp(ipv6h, skb->nh.ipv6h);
+ ip6ip6_ecn_decapsulate(ipv6h, skb);
t->stat.rx_packets++;
t->stat.rx_bytes += skb->len;
netif_rx(skb);
return 0;
}
read_unlock(&ip6ip6_lock);
- icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev);
+ return 1;
+
discard:
kfree_skb(skb);
return 0;
static inline int
ip6ip6_tnl_addr_conflict(struct ip6_tnl *t, struct ipv6hdr *hdr)
{
- return !ipv6_addr_cmp(&t->parms.raddr, &hdr->saddr);
+ return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr);
}
/**
* 0
**/
-int ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
+static int
+ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
{
- struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
+ struct ip6_tnl *t = netdev_priv(dev);
struct net_device_stats *stats = &t->stat;
struct ipv6hdr *ipv6h = skb->nh.ipv6h;
struct ipv6_txoptions *opt = NULL;
u8 proto;
int err;
int pkt_len;
+ int dsfield;
if (t->recursion++) {
stats->collisions++;
memcpy(&fl, &t->fl, sizeof (fl));
proto = fl.proto;
+ dsfield = ipv6_get_dsfield(ipv6h);
if ((t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS))
fl.fl6_flowlabel |= (*(__u32 *) ipv6h & IPV6_TCLASS_MASK);
if ((t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL))
if ((dst = ip6_tnl_dst_check(t)) != NULL)
dst_hold(dst);
- else
+ else {
dst = ip6_route_output(NULL, &fl);
- if (dst->error || xfrm_lookup(&dst, &fl, NULL, 0) < 0)
- goto tx_err_link_failure;
+ if (dst->error || xfrm_lookup(&dst, &fl, NULL, 0) < 0)
+ goto tx_err_link_failure;
+ }
tdev = dst->dev;
t->parms.name);
goto tx_err_dst_release;
}
- mtu = dst_pmtu(dst) - sizeof (*ipv6h);
+ mtu = dst_mtu(dst) - sizeof (*ipv6h);
if (opt) {
max_headroom += 8;
mtu -= 8;
}
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
- if (skb->dst && mtu < dst_pmtu(skb->dst)) {
+ if (skb->dst && mtu < dst_mtu(skb->dst)) {
struct rt6_info *rt = (struct rt6_info *) skb->dst;
rt->rt6i_flags |= RTF_MODIFIED;
rt->u.dst.metrics[RTAX_MTU-1] = mtu;
skb->nh.raw = skb_push(skb, sizeof(struct ipv6hdr));
ipv6h = skb->nh.ipv6h;
*(u32*)ipv6h = fl.fl6_flowlabel | htonl(0x60000000);
+ dsfield = INET_ECN_encapsulate(0, dsfield);
+ ipv6_change_dsfield(ipv6h, ~INET_ECN_MASK, dsfield);
ipv6h->payload_len = htons(skb->len - sizeof(struct ipv6hdr));
ipv6h->hop_limit = t->parms.hop_limit;
ipv6h->nexthdr = proto;
ipv6_addr_copy(&ipv6h->saddr, &fl.fl6_src);
ipv6_addr_copy(&ipv6h->daddr, &fl.fl6_dst);
-#ifdef CONFIG_NETFILTER
- nf_conntrack_put(skb->nfct);
- skb->nfct = NULL;
-#ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug = 0;
-#endif
-#endif
+ nf_reset(skb);
pkt_len = skb->len;
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL,
skb->dst->dev, dst_output);
}
ip6_tnl_dst_store(t, dst);
- if (opt)
- kfree(opt);
+ kfree(opt);
t->recursion--;
return 0;
dst_link_failure(skb);
tx_err_dst_release:
dst_release(dst);
- if (opt)
- kfree(opt);
+ kfree(opt);
tx_err:
stats->tx_errors++;
stats->tx_dropped++;
t->parms.hop_limit = p->hop_limit;
t->parms.encap_limit = p->encap_limit;
t->parms.flowinfo = p->flowinfo;
+ t->parms.link = p->link;
+ ip6_tnl_dst_reset(t);
ip6ip6_tnl_link_config(t);
return 0;
}
break;
}
if ((err = ip6ip6_tnl_locate(&p, &t, 0)) == -ENODEV)
- t = (struct ip6_tnl *) dev->priv;
+ t = netdev_priv(dev);
else if (err)
break;
} else
- t = (struct ip6_tnl *) dev->priv;
+ t = netdev_priv(dev);
memcpy(&p, &t->parms, sizeof (p));
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
break;
}
if (!create && dev != ip6ip6_fb_tnl_dev) {
- t = (struct ip6_tnl *) dev->priv;
+ t = netdev_priv(dev);
}
if (!t && (err = ip6ip6_tnl_locate(&p, &t, create))) {
break;
err = ip6ip6_tnl_locate(&p, &t, 0);
if (err)
break;
- if (t == ip6ip6_fb_tnl_dev->priv) {
+ if (t == netdev_priv(ip6ip6_fb_tnl_dev)) {
err = -EPERM;
break;
}
} else {
- t = (struct ip6_tnl *) dev->priv;
+ t = netdev_priv(dev);
}
err = unregister_netdevice(t->dev);
break;
static struct net_device_stats *
ip6ip6_tnl_get_stats(struct net_device *dev)
{
- return &(((struct ip6_tnl *) dev->priv)->stat);
+ return &(((struct ip6_tnl *)netdev_priv(dev))->stat);
}
/**
static inline void
ip6ip6_tnl_dev_init_gen(struct net_device *dev)
{
- struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
+ struct ip6_tnl *t = netdev_priv(dev);
t->fl.proto = IPPROTO_IPV6;
t->dev = dev;
strcpy(t->parms.name, dev->name);
static int
ip6ip6_tnl_dev_init(struct net_device *dev)
{
- struct ip6_tnl *t = (struct ip6_tnl *) dev->priv;
+ struct ip6_tnl *t = netdev_priv(dev);
ip6ip6_tnl_dev_init_gen(dev);
ip6ip6_tnl_link_config(t);
return 0;
* Return: 0
**/
-int ip6ip6_fb_tnl_dev_init(struct net_device *dev)
+static int
+ip6ip6_fb_tnl_dev_init(struct net_device *dev)
{
- struct ip6_tnl *t = dev->priv;
+ struct ip6_tnl *t = netdev_priv(dev);
ip6ip6_tnl_dev_init_gen(dev);
dev_hold(dev);
tnls_wc[0] = t;
return 0;
}
-static struct inet6_protocol ip6ip6_protocol = {
- .handler = ip6ip6_rcv,
- .err_handler = ip6ip6_err,
- .flags = INET6_PROTO_FINAL
+static struct xfrm6_tunnel ip6ip6_handler = {
+ .handler = ip6ip6_rcv,
+ .err_handler = ip6ip6_err,
+ .priority = 1,
};
/**
{
int err;
- if ((err = inet6_add_protocol(&ip6ip6_protocol, IPPROTO_IPV6)) < 0) {
- printk(KERN_ERR "Failed to register IPv6 protocol\n");
- return err;
+ if (xfrm6_tunnel_register(&ip6ip6_handler)) {
+ printk(KERN_ERR "ip6ip6 init: can't register tunnel\n");
+ return -EAGAIN;
}
ip6ip6_fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0",
ip6ip6_tnl_dev_setup);
}
return 0;
fail:
- inet6_del_protocol(&ip6ip6_protocol, IPPROTO_IPV6);
+ xfrm6_tunnel_deregister(&ip6ip6_handler);
return err;
}
static void __exit ip6_tunnel_cleanup(void)
{
+ if (xfrm6_tunnel_deregister(&ip6ip6_handler))
+ printk(KERN_INFO "ip6ip6 close: can't deregister tunnel\n");
+
unregister_netdev(ip6ip6_fb_tnl_dev);
- inet6_del_protocol(&ip6ip6_protocol, IPPROTO_IPV6);
}
module_init(ip6_tunnel_init);
git://git.onelab.eu / linux-2.6.git / blobdiff