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Date: Thu, 08 Nov 2007 12:41:39 -0800 From: osprey67 <osprey67@...oo.com> To: netdev@...r.kernel.org Subject: [PATCH 02/05] ipv6: RFC4214 Support (2) From: Fred L. Templin <osprey67@...oo.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 the unmodified "ip" utility with device names beginning with: "isatap". The following diffs are specific to the Linux 2.6.24-rc2 kernel distribution. Signed-off-by: Fred L. Templin <osprey67@...oo.com> --- --- 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 2007-11-08 08:27:24.000000000 -0800 @@ -241,6 +241,37 @@ static inline int ipv6_addr_is_ll_all_ro addr->s6_addr32[3] == htonl(0x00000002)); } +#if defined(CONFIG_IPV6_ISATAP) +static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr) +{ + + /* RFC3330 Special-Use IPv4 Addresses */ + eui[0] = (((addr & htonl(0xFF000000)) == htonl(0x00000000)) || + ((addr & htonl(0xFF000000)) == htonl(0x0A000000)) || + ((addr & htonl(0xFF000000)) == htonl(0x0D000000)) || + ((addr & htonl(0xFF000000)) == htonl(0x18000000)) || + ((addr & htonl(0xFF000000)) == htonl(0x7F000000)) || + ((addr & htonl(0xFFFF0000)) == htonl(0xA9FE0000)) || + ((addr & htonl(0xFFF00000)) == htonl(0xAC100000)) || + ((addr & htonl(0xFFFFFF00)) == htonl(0xC0000200)) || + ((addr & htonl(0xFFFFFF00)) == htonl(0xC0586300)) || + ((addr & htonl(0xFFFF0000)) == htonl(0xC0A80000)) || + ((addr & htonl(0xFFFE0000)) == htonl(0xC6120000)) || + ((addr & htonl(0xF0000000)) == htonl(0xE0000000)) || + ((addr & htonl(0xF0000000)) == htonl(0xF0000000))) ? + 0x00 : 0x02; + + eui[1] = 0; eui[2] = 0x5E; eui[3] = 0xFE; + memcpy (eui+4, &addr, 4); + return 0; +} + +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); - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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