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Date:	Mon, 12 Nov 2007 14:03:08 -0800
From:	"Templin, Fred L" <Fred.L.Templin@...ing.com>
To:	<netdev@...r.kernel.org>
Cc:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
Subject: [PATCH 01/04] ipv6: RFC4214 Support (5)

From: Fred L. Templin <fred.l.templin@...ing.com>

This is experimental support for the Intra-Site Automatic
Tunnel Addressing Protocol (ISATAP) per RFC4214. It uses
the SIT module, and is configured using extensions to the
"iproute2" utility.

The following diffs are specific to the Linux 2.6.24-rc2
kernel distribution.

Signed-off-by: Fred L. Templin <fred.l.templin@...ing.com>

---

--- linux-2.6.24-rc2/include/linux/if.h.orig	2007-11-08 12:05:47.000000000 -0800
+++ linux-2.6.24-rc2/include/linux/if.h	2007-11-08 08:26:44.000000000 -0800
@@ -61,6 +61,7 @@
 #define IFF_MASTER_ALB	0x10		/* bonding master, balance-alb.	*/
 #define IFF_BONDING	0x20		/* bonding master or slave	*/
 #define IFF_SLAVE_NEEDARP 0x40		/* need ARPs for validation	*/
+#define IFF_ISATAP	0x80		/* ISATAP interface (RFC4214)	*/
 
 #define IF_GET_IFACE	0x0001		/* for querying only */
 #define IF_GET_PROTO	0x0002
--- linux-2.6.24-rc2/include/linux/in.h.orig	2007-11-09 08:00:32.000000000 -0800
+++ linux-2.6.24-rc2/include/linux/in.h	2007-11-12 07:37:05.000000000 -0800
@@ -253,6 +253,14 @@ struct sockaddr_in {
 #define ZERONET(x)	(((x) & htonl(0xff000000)) == htonl(0x00000000))
 #define LOCAL_MCAST(x)	(((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
 
+/* Special-Use IPv4 Addresses (RFC3330) */
+#define PRIVATE_10(x)	(((x) & htonl(0xff000000)) == htonl(0x0A000000))
+#define LINKLOCAL_169(x) (((x) & htonl(0xffff0000)) == htonl(0xA9FE0000))
+#define PRIVATE_172(x)	(((x) & htonl(0xfff00000)) == htonl(0xAC100000))
+#define TEST_192(x)	(((x) & htonl(0xffffff00)) == htonl(0xC0000200))
+#define ANYCAST_6TO4(x)	(((x) & htonl(0xffffff00)) == htonl(0xC0586300))
+#define PRIVATE_192(x)	(((x) & htonl(0xffff0000)) == htonl(0xC0A80000))
+#define TEST_198(x)	(((x) & htonl(0xfffe0000)) == htonl(0xC6120000))
 #endif
 
 #endif	/* _LINUX_IN_H */
--- linux-2.6.24-rc2/include/net/addrconf.h.orig	2007-11-08 12:06:17.000000000 -0800
+++ linux-2.6.24-rc2/include/net/addrconf.h	2007-11-09 08:12:29.000000000 -0800
@@ -241,6 +241,14 @@ static inline int ipv6_addr_is_ll_all_ro
 		addr->s6_addr32[3] == htonl(0x00000002));
 }
 
+#if defined(CONFIG_IPV6_ISATAP)
+/* only for IFF_ISATAP interfaces */
+static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
+{
+	return ((addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE));
+}
+#endif
+
 #ifdef CONFIG_PROC_FS
 extern int if6_proc_init(void);
 extern void if6_proc_exit(void);
-
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