2007-02-21 10:25:42 -07:00
|
|
|
/*
|
|
|
|
* IPv6 library code, needed by static components when full IPv6 support is
|
|
|
|
* not configured or static.
|
|
|
|
*/
|
|
|
|
|
2011-07-15 09:47:34 -06:00
|
|
|
#include <linux/export.h>
|
2007-02-21 10:25:42 -07:00
|
|
|
#include <net/ipv6.h>
|
2013-06-25 02:30:11 -06:00
|
|
|
#include <net/addrconf.h>
|
2013-08-30 23:44:35 -06:00
|
|
|
#include <net/ip.h>
|
2007-02-21 10:25:42 -07:00
|
|
|
|
2014-09-27 16:46:06 -06:00
|
|
|
/* if ipv6 module registers this function is used by xfrm to force all
|
|
|
|
* sockets to relookup their nodes - this is fairly expensive, be
|
|
|
|
* careful
|
|
|
|
*/
|
|
|
|
void (*__fib6_flush_trees)(struct net *);
|
|
|
|
EXPORT_SYMBOL(__fib6_flush_trees);
|
|
|
|
|
2007-02-21 10:25:42 -07:00
|
|
|
#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
|
|
|
|
|
2012-04-14 23:58:06 -06:00
|
|
|
static inline unsigned int ipv6_addr_scope2type(unsigned int scope)
|
2007-02-21 10:25:42 -07:00
|
|
|
{
|
2012-04-01 01:49:02 -06:00
|
|
|
switch (scope) {
|
2007-02-21 10:25:42 -07:00
|
|
|
case IPV6_ADDR_SCOPE_NODELOCAL:
|
|
|
|
return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
|
|
|
|
IPV6_ADDR_LOOPBACK);
|
|
|
|
case IPV6_ADDR_SCOPE_LINKLOCAL:
|
|
|
|
return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
|
|
|
|
IPV6_ADDR_LINKLOCAL);
|
|
|
|
case IPV6_ADDR_SCOPE_SITELOCAL:
|
|
|
|
return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
|
|
|
|
IPV6_ADDR_SITELOCAL);
|
|
|
|
}
|
|
|
|
return IPV6_ADDR_SCOPE_TYPE(scope);
|
|
|
|
}
|
|
|
|
|
|
|
|
int __ipv6_addr_type(const struct in6_addr *addr)
|
|
|
|
{
|
|
|
|
__be32 st;
|
|
|
|
|
|
|
|
st = addr->s6_addr32[0];
|
|
|
|
|
|
|
|
/* Consider all addresses with the first three bits different of
|
|
|
|
000 and 111 as unicasts.
|
|
|
|
*/
|
|
|
|
if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
|
|
|
|
(st & htonl(0xE0000000)) != htonl(0xE0000000))
|
|
|
|
return (IPV6_ADDR_UNICAST |
|
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));
|
|
|
|
|
|
|
|
if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
|
|
|
|
/* multicast */
|
|
|
|
/* addr-select 3.1 */
|
|
|
|
return (IPV6_ADDR_MULTICAST |
|
|
|
|
ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
|
|
|
|
return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST |
|
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.1 */
|
|
|
|
if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
|
|
|
|
return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
|
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */
|
2007-07-30 18:19:31 -06:00
|
|
|
if ((st & htonl(0xFE000000)) == htonl(0xFC000000))
|
|
|
|
return (IPV6_ADDR_UNICAST |
|
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* RFC 4193 */
|
2007-02-21 10:25:42 -07:00
|
|
|
|
|
|
|
if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
|
|
|
|
if (addr->s6_addr32[2] == 0) {
|
|
|
|
if (addr->s6_addr32[3] == 0)
|
|
|
|
return IPV6_ADDR_ANY;
|
|
|
|
|
|
|
|
if (addr->s6_addr32[3] == htonl(0x00000001))
|
|
|
|
return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
|
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */
|
|
|
|
|
|
|
|
return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
|
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
|
|
|
|
}
|
|
|
|
|
|
|
|
if (addr->s6_addr32[2] == htonl(0x0000ffff))
|
|
|
|
return (IPV6_ADDR_MAPPED |
|
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
|
|
|
|
}
|
|
|
|
|
2010-02-25 16:28:58 -07:00
|
|
|
return (IPV6_ADDR_UNICAST |
|
2007-02-21 10:25:42 -07:00
|
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
|
|
|
|
}
|
2007-02-22 00:26:56 -07:00
|
|
|
EXPORT_SYMBOL(__ipv6_addr_type);
|
2007-02-21 10:25:42 -07:00
|
|
|
|
2013-04-14 09:18:43 -06:00
|
|
|
static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
|
|
|
|
|
|
|
|
int register_inet6addr_notifier(struct notifier_block *nb)
|
|
|
|
{
|
|
|
|
return atomic_notifier_chain_register(&inet6addr_chain, nb);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(register_inet6addr_notifier);
|
|
|
|
|
|
|
|
int unregister_inet6addr_notifier(struct notifier_block *nb)
|
|
|
|
{
|
|
|
|
return atomic_notifier_chain_unregister(&inet6addr_chain, nb);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(unregister_inet6addr_notifier);
|
|
|
|
|
|
|
|
int inet6addr_notifier_call_chain(unsigned long val, void *v)
|
|
|
|
{
|
|
|
|
return atomic_notifier_call_chain(&inet6addr_chain, val, v);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(inet6addr_notifier_call_chain);
|
2013-08-30 23:44:30 -06:00
|
|
|
|
|
|
|
const struct ipv6_stub *ipv6_stub __read_mostly;
|
|
|
|
EXPORT_SYMBOL_GPL(ipv6_stub);
|
2013-08-30 23:44:31 -06:00
|
|
|
|
|
|
|
/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
|
|
|
|
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
|
|
|
|
EXPORT_SYMBOL(in6addr_loopback);
|
|
|
|
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
|
|
|
|
EXPORT_SYMBOL(in6addr_any);
|
|
|
|
const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
|
|
|
|
EXPORT_SYMBOL(in6addr_linklocal_allnodes);
|
|
|
|
const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
|
|
|
|
EXPORT_SYMBOL(in6addr_linklocal_allrouters);
|
|
|
|
const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT;
|
|
|
|
EXPORT_SYMBOL(in6addr_interfacelocal_allnodes);
|
|
|
|
const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT;
|
|
|
|
EXPORT_SYMBOL(in6addr_interfacelocal_allrouters);
|
|
|
|
const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT;
|
|
|
|
EXPORT_SYMBOL(in6addr_sitelocal_allrouters);
|
2013-08-30 23:44:35 -06:00
|
|
|
|
|
|
|
static void snmp6_free_dev(struct inet6_dev *idev)
|
|
|
|
{
|
|
|
|
kfree(idev->stats.icmpv6msgdev);
|
|
|
|
kfree(idev->stats.icmpv6dev);
|
2014-05-05 16:55:55 -06:00
|
|
|
free_percpu(idev->stats.ipv6);
|
2013-08-30 23:44:35 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Nobody refers to this device, we may destroy it. */
|
|
|
|
|
|
|
|
void in6_dev_finish_destroy(struct inet6_dev *idev)
|
|
|
|
{
|
|
|
|
struct net_device *dev = idev->dev;
|
|
|
|
|
|
|
|
WARN_ON(!list_empty(&idev->addr_list));
|
2015-03-29 07:00:05 -06:00
|
|
|
WARN_ON(idev->mc_list);
|
2013-08-30 23:44:35 -06:00
|
|
|
WARN_ON(timer_pending(&idev->rs_timer));
|
|
|
|
|
|
|
|
#ifdef NET_REFCNT_DEBUG
|
|
|
|
pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL");
|
|
|
|
#endif
|
|
|
|
dev_put(dev);
|
|
|
|
if (!idev->dead) {
|
|
|
|
pr_warn("Freeing alive inet6 device %p\n", idev);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
snmp6_free_dev(idev);
|
|
|
|
kfree_rcu(idev, rcu);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(in6_dev_finish_destroy);
|