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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2005-11-08 09:38:12 -0800
committerDavid S. Miller <davem@davemloft.net>2005-11-08 09:38:12 -0800
commitb1cacb6820e0afc4aeeea67bcb5296a316862cad (patch)
treee7a563d832dfb028b31492ec76054ca30c2c8878
parent971f359ddcb2e7a0d577479c7561bda407febe1b (diff)
[IPV6]: Make ipv6_addr_type() more generic so that we can use it for source address selection.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/ipv6.h19
-rw-r--r--net/ipv6/addrconf.c90
-rw-r--r--net/ipv6/ipv6_syms.c2
3 files changed, 64 insertions, 47 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 98661fa4fc7..6addb4d464d 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -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)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 2c5f57299d6..ff895da6395 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -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;
- }
-
- 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_MAPPED |
+ IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL)); /* addr-select 3.3 */
+ }
+
+ 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)
diff --git a/net/ipv6/ipv6_syms.c b/net/ipv6/ipv6_syms.c
index 37a4a99c9fe..16482785bdf 100644
--- a/net/ipv6/ipv6_syms.c
+++ b/net/ipv6/ipv6_syms.c
@@ -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);