From c7dc89c0ac8e7c3796bff91becf58ccdbcaf9f18 Mon Sep 17 00:00:00 2001 From: "Fred L. Templin" Date: Thu, 29 Nov 2007 22:11:40 +1100 Subject: [IPV6]: Add RFC4214 support This patch includes 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 diffs are specific to the Linux 2.6.24-rc2 kernel distribution. This version includes the diff for ./include/linux/if.h which was missing in the v2.4 submission and is needed to make the patch compile. The patch has been installed, compiled and tested in a clean 2.6.24-rc2 kernel build area. Signed-off-by: Fred L. Templin Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- include/linux/if.h | 1 + include/linux/if_tunnel.h | 3 +++ include/linux/in.h | 8 ++++++++ include/net/addrconf.h | 19 +++++++++++++++++++ 4 files changed, 31 insertions(+) (limited to 'include') diff --git a/include/linux/if.h b/include/linux/if.h index 186070d5c54..5c9d1fa93fe 100644 --- a/include/linux/if.h +++ b/include/linux/if.h @@ -63,6 +63,7 @@ #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 diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h index 660b5010c2d..228eb4eb312 100644 --- a/include/linux/if_tunnel.h +++ b/include/linux/if_tunnel.h @@ -17,6 +17,9 @@ #define GRE_FLAGS __constant_htons(0x00F8) #define GRE_VERSION __constant_htons(0x0007) +/* i_flags values for SIT mode */ +#define SIT_ISATAP 0x0001 + struct ip_tunnel_parm { char name[IFNAMSIZ]; diff --git a/include/linux/in.h b/include/linux/in.h index 3975cbf52f2..a8f00cac8f7 100644 --- a/include/linux/in.h +++ b/include/linux/in.h @@ -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 */ diff --git a/include/net/addrconf.h b/include/net/addrconf.h index bccc2feb99d..c56827da0de 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -17,6 +17,7 @@ #define IPV6_MAX_ADDRESSES 16 +#include #include struct prefix_info { @@ -249,6 +250,24 @@ static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) addr->s6_addr32[3] == htonl(0x00000002)); } +static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr) +{ + eui[0] = (ZERONET(addr) || PRIVATE_10(addr) || LOOPBACK(addr) || + LINKLOCAL_169(addr) || PRIVATE_172(addr) || TEST_192(addr) || + ANYCAST_6TO4(addr) || PRIVATE_192(addr) || TEST_198(addr) || + MULTICAST(addr) || BADCLASS(addr)) ? 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)); +} + #ifdef CONFIG_PROC_FS extern int if6_proc_init(void); extern void if6_proc_exit(void); -- cgit v1.2.3