f88c91ddba
Tomas reported the following build error: net/built-in.o: In function `ieee80211_unregister_hw': (.text+0x10f0e1): undefined reference to `unregister_inet6addr_notifier' net/built-in.o: In function `ieee80211_register_hw': (.text+0x10f610): undefined reference to `register_inet6addr_notifier' make: *** [vmlinux] Error 1 when built IPv6 as a module. So we have to statically link these symbols. Reported-by: Tomas Melin <tomas.melin@iki.fi> Cc: Tomas Melin <tomas.melin@iki.fi> Cc: "David S. Miller" <davem@davemloft.net> Cc: YOSHIFUJI Hidaki <yoshfuji@linux-ipv6.org> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
99 lines
3 KiB
C
99 lines
3 KiB
C
/*
|
|
* IPv6 library code, needed by static components when full IPv6 support is
|
|
* not configured or static.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <net/ipv6.h>
|
|
|
|
#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
|
|
|
|
static inline unsigned int ipv6_addr_scope2type(unsigned int scope)
|
|
{
|
|
switch (scope) {
|
|
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 */
|
|
if ((st & htonl(0xFE000000)) == htonl(0xFC000000))
|
|
return (IPV6_ADDR_UNICAST |
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* RFC 4193 */
|
|
|
|
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 */
|
|
}
|
|
|
|
return (IPV6_ADDR_UNICAST |
|
|
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
|
|
}
|
|
EXPORT_SYMBOL(__ipv6_addr_type);
|
|
|
|
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);
|