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[IPV6]: Make ipv6_addr_type() more generic so that we can use it for source address selection.

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2005-11-08 09:38:12 -08:00 committed by David S. Miller
parent 971f359ddc
commit b1cacb6820
3 changed files with 62 additions and 45 deletions
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19
include/net/ipv6.h
View file

@ -252,12 +252,25 @@ typedef int (*inet_getfrag_t) (const void *data,
char *,
unsigned int, unsigned int);
extern int ipv6_addr_type(const struct in6_addr *addr);
extern int __ipv6_addr_type(const struct in6_addr *addr);
static inline int ipv6_addr_type(const struct in6_addr *addr)
{
return __ipv6_addr_type(addr) & 0xffff;
}
static inline int ipv6_addr_scope(const struct in6_addr *addr)
{
return ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
}
static inline int __ipv6_addr_src_scope(int type)
{
return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
}
static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
{
return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
}
static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)

86
net/ipv6/addrconf.c
View file

@ -35,6 +35,9 @@
* YOSHIFUJI Hideaki @USAGI : ARCnet support
* YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
* seq_file.
* YOSHIFUJI Hideaki @USAGI : improved source address
* selection; consider scope,
* status etc.
*/
#include <linux/config.h>
@ -193,46 +196,51 @@ const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
#endif
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
int ipv6_addr_type(const struct in6_addr *addr)
#define IPV6_ADDR_SCOPE_TYPE(scope) ((scope) << 16)
static inline unsigned ipv6_addr_scope2type(unsigned 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)
{
int type;
u32 st;
st = addr->s6_addr32[0];
if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
type = IPV6_ADDR_MULTICAST;
switch((st & htonl(0x00FF0000))) {
case __constant_htonl(0x00010000):
type |= IPV6_ADDR_LOOPBACK;
break;
case __constant_htonl(0x00020000):
type |= IPV6_ADDR_LINKLOCAL;
break;
case __constant_htonl(0x00050000):
type |= IPV6_ADDR_SITELOCAL;
break;
};
return type;
}
type = IPV6_ADDR_UNICAST;
/* Consider all addresses with the first three bits different of
000 and 111 as finished.
000 and 111 as unicasts.
*/
if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
(st & htonl(0xE0000000)) != htonl(0xE0000000))
return type;
if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
return (IPV6_ADDR_LINKLOCAL | type);
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 | type);
return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL)); /* addr-select 3.1 */
if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
if (addr->s6_addr32[2] == 0) {
@ -240,24 +248,20 @@ int ipv6_addr_type(const struct in6_addr *addr)
return IPV6_ADDR_ANY;
if (addr->s6_addr32[3] == htonl(0x00000001))
return (IPV6_ADDR_LOOPBACK | type);
return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL)); /* addr-select 3.4 */
return (IPV6_ADDR_COMPATv4 | type);
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;
return (IPV6_ADDR_MAPPED |
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
}
st &= htonl(0xFF000000);
if (st == 0)
return IPV6_ADDR_RESERVED;
st &= htonl(0xFE000000);
if (st == htonl(0x02000000))
return IPV6_ADDR_RESERVED; /* for NSAP */
if (st == htonl(0x04000000))
return IPV6_ADDR_RESERVED; /* for IPX */
return type;
return (IPV6_ADDR_RESERVED |
IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.4 */
}
static void addrconf_del_timer(struct inet6_ifaddr *ifp)

2
net/ipv6/ipv6_syms.c
View file

@ -7,7 +7,7 @@
#include <net/ip6_route.h>
#include <net/xfrm.h>
EXPORT_SYMBOL(ipv6_addr_type);
EXPORT_SYMBOL(__ipv6_addr_type);
EXPORT_SYMBOL(icmpv6_send);
EXPORT_SYMBOL(icmpv6_statistics);
EXPORT_SYMBOL(icmpv6_err_convert);