*
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/capability.h>
#include <linux/errno.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>
#define HASH_SIZE 32
-#define HASH(addr) (((addr)->s6_addr32[0] ^ (addr)->s6_addr32[1] ^ \
+#define HASH(addr) ((__force u32)((addr)->s6_addr32[0] ^ (addr)->s6_addr32[1] ^ \
(addr)->s6_addr32[2] ^ (addr)->s6_addr32[3]) & \
(HASH_SIZE - 1))
* Create tunnel matching given parameters.
*
* Return:
- * 0 on success
+ * created tunnel or NULL
**/
-static int
-ip6_tnl_create(struct ip6_tnl_parm *p, struct ip6_tnl **pt)
+static struct ip6_tnl *ip6_tnl_create(struct ip6_tnl_parm *p)
{
struct net_device *dev;
struct ip6_tnl *t;
break;
}
if (i == IP6_TNL_MAX)
- return -ENOBUFS;
+ goto failed;
}
dev = alloc_netdev(sizeof (*t), name, ip6ip6_tnl_dev_setup);
if (dev == NULL)
- return -ENOMEM;
+ goto failed;
t = netdev_priv(dev);
dev->init = ip6ip6_tnl_dev_init;
if ((err = register_netdevice(dev)) < 0) {
free_netdev(dev);
- return err;
+ goto failed;
}
dev_hold(dev);
-
ip6ip6_tnl_link(t);
- *pt = t;
- return 0;
+ return t;
+failed:
+ return NULL;
}
/**
* tunnel device is created and registered for use.
*
* Return:
- * 0 if tunnel located or created,
- * -EINVAL if parameters incorrect,
- * -ENODEV if no matching tunnel available
+ * matching tunnel or NULL
**/
-static int
-ip6ip6_tnl_locate(struct ip6_tnl_parm *p, struct ip6_tnl **pt, int create)
+static struct ip6_tnl *ip6ip6_tnl_locate(struct ip6_tnl_parm *p, int create)
{
struct in6_addr *remote = &p->raddr;
struct in6_addr *local = &p->laddr;
struct ip6_tnl *t;
- if (p->proto != IPPROTO_IPV6)
- return -EINVAL;
-
for (t = *ip6ip6_bucket(p); t; t = t->next) {
if (ipv6_addr_equal(local, &t->parms.laddr) &&
- ipv6_addr_equal(remote, &t->parms.raddr)) {
- *pt = t;
- return (create ? -EEXIST : 0);
- }
+ ipv6_addr_equal(remote, &t->parms.raddr))
+ return t;
}
if (!create)
- return -ENODEV;
-
- return ip6_tnl_create(p, pt);
+ return NULL;
+ return ip6_tnl_create(p);
}
/**
* to the specifications in RFC 2473.
**/
-static void
+static int
ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __u32 info)
+ int type, int code, int offset, __be32 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;
}
break;
case ICMPV6_PARAMPROB:
- /* ignore if parameter problem not caused by a tunnel
- encapsulation limit sub-option */
- if (code != ICMPV6_HDR_FIELD) {
- break;
- }
- teli = parse_tlv_tnl_enc_lim(skb, skb->data);
+ teli = 0;
+ if (code == ICMPV6_HDR_FIELD)
+ teli = parse_tlv_tnl_enc_lim(skb, skb->data);
if (teli && teli == ntohl(info) - 2) {
tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli];
"tunnel!\n", t->parms.name);
rel_msg = 1;
}
+ } else if (net_ratelimit()) {
+ printk(KERN_WARNING
+ "%s: Recipient unable to parse tunneled "
+ "packet!\n ", t->parms.name);
}
break;
case ICMPV6_PKT_TOOBIG:
if (rel_msg && pskb_may_pull(skb, offset + sizeof (*ipv6h))) {
struct rt6_info *rt;
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
+
if (!skb2)
goto out;
}
out:
read_unlock(&ip6ip6_lock);
+ return err;
}
static inline void ip6ip6_ecn_decapsulate(struct ipv6hdr *outer_iph,
if (INET_ECN_is_ce(ipv6_get_dsfield(outer_iph)))
IP6_ECN_set_ce(inner_iph);
}
+static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
+{
+ struct ip6_tnl_parm *p = &t->parms;
+ int ret = 0;
+
+ if (p->flags & IP6_TNL_F_CAP_RCV) {
+ struct net_device *ldev = NULL;
+
+ if (p->link)
+ ldev = dev_get_by_index(p->link);
+
+ if ((ipv6_addr_is_multicast(&p->laddr) ||
+ likely(ipv6_chk_addr(&p->laddr, ldev, 0))) &&
+ likely(!ipv6_chk_addr(&p->raddr, NULL, 0)))
+ ret = 1;
+
+ if (ldev)
+ dev_put(ldev);
+ }
+ return ret;
+}
/**
* ip6ip6_rcv - decapsulate IPv6 packet and retransmit it locally
**/
static int
-ip6ip6_rcv(struct sk_buff **pskb)
+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);
- kfree_skb(skb);
- return 0;
+ goto discard;
}
- if (!(t->parms.flags & IP6_TNL_F_CAP_RCV)) {
+ if (!ip6_tnl_rcv_ctl(t)) {
t->stat.rx_dropped++;
read_unlock(&ip6ip6_lock);
goto discard;
skb->dev = t->dev;
dst_release(skb->dst);
skb->dst = NULL;
+ nf_reset(skb);
if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
ipv6_copy_dscp(ipv6h, skb->nh.ipv6h);
ip6ip6_ecn_decapsulate(ipv6h, skb);
return 0;
}
read_unlock(&ip6ip6_lock);
- icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev);
-discard:
return 1;
-}
-
-static inline struct ipv6_txoptions *create_tel(__u8 encap_limit)
-{
- struct ipv6_tlv_tnl_enc_lim *tel;
- struct ipv6_txoptions *opt;
- __u8 *raw;
- int opt_len = sizeof(*opt) + 8;
+discard:
+ kfree_skb(skb);
+ return 0;
+}
- if (!(opt = kmalloc(opt_len, GFP_ATOMIC))) {
- return NULL;
- }
- memset(opt, 0, opt_len);
- opt->tot_len = opt_len;
- opt->dst0opt = (struct ipv6_opt_hdr *) (opt + 1);
- opt->opt_nflen = 8;
+struct ipv6_tel_txoption {
+ struct ipv6_txoptions ops;
+ __u8 dst_opt[8];
+};
- tel = (struct ipv6_tlv_tnl_enc_lim *) (opt->dst0opt + 1);
- tel->type = IPV6_TLV_TNL_ENCAP_LIMIT;
- tel->length = 1;
- tel->encap_limit = encap_limit;
+static void init_tel_txopt(struct ipv6_tel_txoption *opt, __u8 encap_limit)
+{
+ memset(opt, 0, sizeof(struct ipv6_tel_txoption));
- raw = (__u8 *) opt->dst0opt;
- raw[5] = IPV6_TLV_PADN;
- raw[6] = 1;
+ opt->dst_opt[2] = IPV6_TLV_TNL_ENCAP_LIMIT;
+ opt->dst_opt[3] = 1;
+ opt->dst_opt[4] = encap_limit;
+ opt->dst_opt[5] = IPV6_TLV_PADN;
+ opt->dst_opt[6] = 1;
- return opt;
+ opt->ops.dst0opt = (struct ipv6_opt_hdr *) opt->dst_opt;
+ opt->ops.opt_nflen = 8;
}
/**
return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr);
}
+static inline int ip6_tnl_xmit_ctl(struct ip6_tnl *t)
+{
+ struct ip6_tnl_parm *p = &t->parms;
+ int ret = 0;
+
+ if (p->flags & IP6_TNL_F_CAP_XMIT) {
+ struct net_device *ldev = NULL;
+
+ if (p->link)
+ ldev = dev_get_by_index(p->link);
+
+ if (unlikely(!ipv6_chk_addr(&p->laddr, ldev, 0)))
+ printk(KERN_WARNING
+ "%s xmit: Local address not yet configured!\n",
+ p->name);
+ else if (!ipv6_addr_is_multicast(&p->raddr) &&
+ unlikely(ipv6_chk_addr(&p->raddr, NULL, 0)))
+ printk(KERN_WARNING
+ "%s xmit: Routing loop! "
+ "Remote address found on this node!\n",
+ p->name);
+ else
+ ret = 1;
+ if (ldev)
+ dev_put(ldev);
+ }
+ return ret;
+}
/**
* ip6ip6_tnl_xmit - encapsulate packet and send
* @skb: the outgoing socket buffer
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;
int encap_limit = -1;
+ struct ipv6_tel_txoption opt;
__u16 offset;
struct flowi fl;
struct dst_entry *dst;
goto tx_err;
}
if (skb->protocol != htons(ETH_P_IPV6) ||
- !(t->parms.flags & IP6_TNL_F_CAP_XMIT) ||
- ip6ip6_tnl_addr_conflict(t, ipv6h)) {
+ !ip6_tnl_xmit_ctl(t) || ip6ip6_tnl_addr_conflict(t, ipv6h))
goto tx_err;
- }
+
if ((offset = parse_tlv_tnl_enc_lim(skb, skb->nh.raw)) > 0) {
struct ipv6_tlv_tnl_enc_lim *tel;
tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->nh.raw[offset];
goto tx_err;
}
encap_limit = tel->encap_limit - 1;
- } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) {
+ } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
encap_limit = t->parms.encap_limit;
- }
+
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);
+ fl.fl6_flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
if ((t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL))
- fl.fl6_flowlabel |= (*(__u32 *) ipv6h & IPV6_FLOWLABEL_MASK);
-
- if (encap_limit >= 0 && (opt = create_tel(encap_limit)) == NULL)
- goto tx_err;
+ fl.fl6_flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
if ((dst = ip6_tnl_dst_check(t)) != NULL)
dst_hold(dst);
goto tx_err_dst_release;
}
mtu = dst_mtu(dst) - sizeof (*ipv6h);
- if (opt) {
+ if (encap_limit >= 0) {
max_headroom += 8;
mtu -= 8;
}
skb->h.raw = skb->nh.raw;
- if (opt)
- ipv6_push_nfrag_opts(skb, opt, &proto, NULL);
-
+ if (encap_limit >= 0) {
+ init_tel_txopt(&opt, encap_limit);
+ ipv6_push_nfrag_opts(skb, &opt.ops, &proto, NULL);
+ }
skb->nh.raw = skb_push(skb, sizeof(struct ipv6hdr));
ipv6h = skb->nh.ipv6h;
- *(u32*)ipv6h = fl.fl6_flowlabel | htonl(0x60000000);
+ *(__be32*)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));
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL,
skb->dst->dev, dst_output);
- if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) {
+ if (net_xmit_eval(err) == 0) {
stats->tx_bytes += pkt_len;
stats->tx_packets++;
} else {
stats->tx_aborted_errors++;
}
ip6_tnl_dst_store(t, dst);
-
- kfree(opt);
-
t->recursion--;
return 0;
tx_err_link_failure:
dst_link_failure(skb);
tx_err_dst_release:
dst_release(dst);
- kfree(opt);
tx_err:
stats->tx_errors++;
stats->tx_dropped++;
static void ip6_tnl_set_cap(struct ip6_tnl *t)
{
struct ip6_tnl_parm *p = &t->parms;
- struct in6_addr *laddr = &p->laddr;
- struct in6_addr *raddr = &p->raddr;
- int ltype = ipv6_addr_type(laddr);
- int rtype = ipv6_addr_type(raddr);
+ int ltype = ipv6_addr_type(&p->laddr);
+ int rtype = ipv6_addr_type(&p->raddr);
p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV);
- if (ltype != IPV6_ADDR_ANY && rtype != IPV6_ADDR_ANY &&
- ((ltype|rtype) &
- (IPV6_ADDR_UNICAST|
- IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL|
- IPV6_ADDR_MAPPED|IPV6_ADDR_RESERVED)) == IPV6_ADDR_UNICAST) {
- struct net_device *ldev = NULL;
- int l_ok = 1;
- int r_ok = 1;
-
- if (p->link)
- ldev = dev_get_by_index(p->link);
-
- if (ltype&IPV6_ADDR_UNICAST && !ipv6_chk_addr(laddr, ldev, 0))
- l_ok = 0;
-
- if (rtype&IPV6_ADDR_UNICAST && ipv6_chk_addr(raddr, NULL, 0))
- r_ok = 0;
-
- if (l_ok && r_ok) {
- if (ltype&IPV6_ADDR_UNICAST)
- p->flags |= IP6_TNL_F_CAP_XMIT;
- if (rtype&IPV6_ADDR_UNICAST)
- p->flags |= IP6_TNL_F_CAP_RCV;
- }
- if (ldev)
- dev_put(ldev);
+ if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
+ rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
+ !((ltype|rtype) & IPV6_ADDR_LOOPBACK) &&
+ (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) {
+ if (ltype&IPV6_ADDR_UNICAST)
+ p->flags |= IP6_TNL_F_CAP_XMIT;
+ if (rtype&IPV6_ADDR_UNICAST)
+ p->flags |= IP6_TNL_F_CAP_RCV;
}
}
dev->iflink = p->link;
if (p->flags & IP6_TNL_F_CAP_XMIT) {
+ int strict = (ipv6_addr_type(&p->raddr) &
+ (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL));
+
struct rt6_info *rt = rt6_lookup(&p->raddr, &p->laddr,
- p->link, 0);
+ p->link, strict);
if (rt == NULL)
return;
ip6ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
int err = 0;
- int create;
struct ip6_tnl_parm p;
struct ip6_tnl *t = NULL;
switch (cmd) {
case SIOCGETTUNNEL:
if (dev == ip6ip6_fb_tnl_dev) {
- if (copy_from_user(&p,
- ifr->ifr_ifru.ifru_data,
- sizeof (p))) {
+ if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
err = -EFAULT;
break;
}
- if ((err = ip6ip6_tnl_locate(&p, &t, 0)) == -ENODEV)
- t = netdev_priv(dev);
- else if (err)
- break;
- } else
+ t = ip6ip6_tnl_locate(&p, 0);
+ }
+ if (t == NULL)
t = netdev_priv(dev);
-
memcpy(&p, &t->parms, sizeof (p));
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
err = -EFAULT;
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
err = -EPERM;
- create = (cmd == SIOCADDTUNNEL);
if (!capable(CAP_NET_ADMIN))
break;
- if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
- err = -EFAULT;
+ err = -EFAULT;
+ if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
break;
- }
- if (!create && dev != ip6ip6_fb_tnl_dev) {
- t = netdev_priv(dev);
- }
- if (!t && (err = ip6ip6_tnl_locate(&p, &t, create))) {
+ err = -EINVAL;
+ if (p.proto != IPPROTO_IPV6)
break;
- }
- if (cmd == SIOCCHGTUNNEL) {
- if (t->dev != dev) {
- err = -EEXIST;
- break;
- }
+ t = ip6ip6_tnl_locate(&p, cmd == SIOCADDTUNNEL);
+ if (dev != ip6ip6_fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
+ if (t != NULL) {
+ if (t->dev != dev) {
+ err = -EEXIST;
+ break;
+ }
+ } else
+ t = netdev_priv(dev);
+
ip6ip6_tnl_unlink(t);
err = ip6ip6_tnl_change(t, &p);
ip6ip6_tnl_link(t);
netdev_state_change(dev);
}
- if (copy_to_user(ifr->ifr_ifru.ifru_data,
- &t->parms, sizeof (p))) {
- err = -EFAULT;
- } else {
+ if (t) {
err = 0;
- }
+ if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof (p)))
+ err = -EFAULT;
+
+ } else
+ err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
break;
case SIOCDELTUNNEL:
err = -EPERM;
break;
if (dev == ip6ip6_fb_tnl_dev) {
- if (copy_from_user(&p, ifr->ifr_ifru.ifru_data,
- sizeof (p))) {
- err = -EFAULT;
+ err = -EFAULT;
+ if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
break;
- }
- err = ip6ip6_tnl_locate(&p, &t, 0);
- if (err)
+ err = -ENOENT;
+ if ((t = ip6ip6_tnl_locate(&p, 0)) == NULL)
break;
- if (t == netdev_priv(ip6ip6_fb_tnl_dev)) {
- err = -EPERM;
+ err = -EPERM;
+ if (t->dev == ip6ip6_fb_tnl_dev)
break;
- }
- } else {
- t = netdev_priv(dev);
+ dev = t->dev;
}
- err = unregister_netdevice(t->dev);
+ err = unregister_netdevice(dev);
break;
default:
err = -EINVAL;
return 0;
}
-#ifdef CONFIG_INET6_TUNNEL
static struct xfrm6_tunnel ip6ip6_handler = {
.handler = ip6ip6_rcv,
.err_handler = ip6ip6_err,
+ .priority = 1,
};
-static inline int ip6ip6_register(void)
-{
- return xfrm6_tunnel_register(&ip6ip6_handler);
-}
-
-static inline int ip6ip6_unregister(void)
-{
- return xfrm6_tunnel_deregister(&ip6ip6_handler);
-}
-#else
-static struct inet6_protocol xfrm6_tunnel_protocol = {
- .handler = ip6ip6_rcv,
- .err_handler = ip6ip6_err,
- .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
-};
-
-static inline int ip6ip6_register(void)
-{
- return inet6_add_protocol(&xfrm6_tunnel_protocol, IPPROTO_IPV6);
-}
-
-static inline int ip6ip6_unregister(void)
-{
- return inet6_del_protocol(&xfrm6_tunnel_protocol, IPPROTO_IPV6);
-}
-#endif
-
/**
* ip6_tunnel_init - register protocol and reserve needed resources
*
{
int err;
- if (ip6ip6_register() < 0) {
+ if (xfrm6_tunnel_register(&ip6ip6_handler)) {
printk(KERN_ERR "ip6ip6 init: can't register tunnel\n");
return -EAGAIN;
}
}
return 0;
fail:
- ip6ip6_unregister();
+ xfrm6_tunnel_deregister(&ip6ip6_handler);
return err;
}
+static void __exit ip6ip6_destroy_tunnels(void)
+{
+ int h;
+ struct ip6_tnl *t;
+
+ for (h = 0; h < HASH_SIZE; h++) {
+ while ((t = tnls_r_l[h]) != NULL)
+ unregister_netdevice(t->dev);
+ }
+
+ t = tnls_wc[0];
+ unregister_netdevice(t->dev);
+}
+
/**
* ip6_tunnel_cleanup - free resources and unregister protocol
**/
static void __exit ip6_tunnel_cleanup(void)
{
- if (ip6ip6_unregister() < 0)
+ if (xfrm6_tunnel_deregister(&ip6ip6_handler))
printk(KERN_INFO "ip6ip6 close: can't deregister tunnel\n");
- unregister_netdev(ip6ip6_fb_tnl_dev);
+ rtnl_lock();
+ ip6ip6_destroy_tunnels();
+ rtnl_unlock();
}
module_init(ip6_tunnel_init);
git://git.onelab.eu / linux-2.6.git / blobdiff