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ipv6 sit: 6rd (IPv6 Rapid Deployment) Support.

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IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
deploy IPv6 unicast service to IPv4 sites to which it provides
customer premise equipment.  Like 6to4, it utilizes stateless IPv6 in
IPv4 encapsulation in order to transit IPv4-only network
infrastructure.  Unlike 6to4, a 6rd service provider uses an IPv6
prefix of its own in place of the fixed 6to4 prefix.

With this option enabled, the SIT driver offers 6rd functionality by
providing additional ioctl API to configure the IPv6 Prefix for in
stead of static 2002::/16 for 6to4.

Original patch was done by Alexandre Cassen <acassen@freebox.fr>
based on old Internet-Draft.

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 / 吉藤英明
2009-09-22 23:43:14 +00:00
committed by David S. Miller
parent ee5e81f000
commit fa857afcf7
4 changed files with 159 additions and 8 deletions
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13
include/net/ipip.h
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@@ -7,6 +7,15 @@
/* Keep error state on tunnel for 30 sec */
#define IPTUNNEL_ERR_TIMEO (30*HZ)
/* 6rd prefix/relay information */
struct ip_tunnel_6rd_parm
{
struct in6_addr prefix;
__be32 relay_prefix;
u16 prefixlen;
u16 relay_prefixlen;
};
struct ip_tunnel
{
struct ip_tunnel *next;
@@ -23,6 +32,10 @@ struct ip_tunnel
struct ip_tunnel_parm parms;
/* for SIT */
#ifdef CONFIG_IPV6_SIT_6RD
struct ip_tunnel_6rd_parm ip6rd;
#endif
struct ip_tunnel_prl_entry *prl; /* potential router list */
unsigned int prl_count; /* # of entries in PRL */
};