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Commit 70ceb4f5 authored by YOSHIFUJI Hideaki's avatar YOSHIFUJI Hideaki Committed by David S. Miller
Browse files

[IPV6]: ROUTE: Add experimental support for Route Information Option in RA (RFC4191). 



Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 52e16356

include/linux/ipv6_route.h

+2 −0
Original line number Diff line number Diff line
@@ -23,6 +23,8 @@ 
#define RTF_NONEXTHOP	0x00200000	/* route with no nexthop	*/

#define RTF_EXPIRES	0x00400000



#define RTF_ROUTEINFO	0x00800000	/* route information - RA	*/



#define RTF_CACHE	0x01000000	/* cache entry			*/

#define RTF_FLOW	0x02000000	/* flow significant route	*/

#define RTF_POLICY	0x04000000	/* policy route			*/

include/net/ip6_route.h

+21 −0
Original line number Diff line number Diff line
@@ -7,6 +7,23 @@ 
#define IP6_RT_PRIO_KERN	512

#define IP6_RT_FLOW_MASK	0x00ff



struct route_info {

	__u8			type;

	__u8			length;

	__u8			prefix_len;

#if defined(__BIG_ENDIAN_BITFIELD)

	__u8			reserved_h:3,

				route_pref:2,

				reserved_l:3;

#elif defined(__LITTLE_ENDIAN_BITFIELD)

	__u8			reserved_l:3,

				route_pref:2,

				reserved_h:3;

#endif

	__u32			lifetime;

	__u8			prefix[0];	/* 0,8 or 16 */

};



#ifdef __KERNEL__



#include <net/flow.h>
@@ -92,6 +109,10 @@ extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr, 


extern void			rt6_purge_dflt_routers(void);



extern int			rt6_route_rcv(struct net_device *dev,

					      u8 *opt, int len,

					      struct in6_addr *gwaddr);



extern void			rt6_redirect(struct in6_addr *dest,

					     struct in6_addr *saddr,

					     struct neighbour *neigh,

include/net/ndisc.h

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ enum { 
	ND_OPT_PREFIX_INFO = 3,		/* RFC2461 */

	ND_OPT_REDIRECT_HDR = 4,	/* RFC2461 */

	ND_OPT_MTU = 5,			/* RFC2461 */

	__ND_OPT_ARRAY_MAX,

	ND_OPT_ROUTE_INFO = 24,		/* RFC4191 */

	__ND_OPT_MAX

};

net/ipv6/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -49,6 +49,14 @@ config IPV6_ROUTER_PREF 


	  If unsure, say N.



config IPV6_ROUTE_INFO

	bool "IPv6: Route Information (RFC 4191) support (EXPERIMENTAL)"

	depends on IPV6_ROUTER_PREF && EXPERIMENTAL

	---help---

	  This is experimental support of Route Information.



	  If unsure, say N.



config INET6_AH

	tristate "IPv6: AH transformation"

	depends on IPV6

net/ipv6/ndisc.c

+24 −1
Original line number Diff line number Diff line
@@ -156,7 +156,11 @@ struct neigh_table nd_tbl = { 


/* ND options */

struct ndisc_options {

	struct nd_opt_hdr *nd_opt_array[__ND_OPT_MAX];

	struct nd_opt_hdr *nd_opt_array[__ND_OPT_ARRAY_MAX];

#ifdef CONFIG_IPV6_ROUTE_INFO

	struct nd_opt_hdr *nd_opts_ri;

	struct nd_opt_hdr *nd_opts_ri_end;

#endif

};



#define nd_opts_src_lladdr	nd_opt_array[ND_OPT_SOURCE_LL_ADDR]
@@ -255,6 +259,13 @@ static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len, 
			if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0)

				ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt;

			break;

#ifdef CONFIG_IPV6_ROUTE_INFO

		case ND_OPT_ROUTE_INFO:

			ndopts->nd_opts_ri_end = nd_opt;

			if (!ndopts->nd_opts_ri)

				ndopts->nd_opts_ri = nd_opt;

			break;

#endif

		default:

			/*

			 * Unknown options must be silently ignored,
@@ -1202,6 +1213,18 @@ static void ndisc_router_discovery(struct sk_buff *skb) 
			     NEIGH_UPDATE_F_ISROUTER);

	}



#ifdef CONFIG_IPV6_ROUTE_INFO

	if (ndopts.nd_opts_ri) {

		struct nd_opt_hdr *p;

		for (p = ndopts.nd_opts_ri;

		     p;

		     p = ndisc_next_option(p, ndopts.nd_opts_ri_end)) {

			rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,

				      &skb->nh.ipv6h->saddr);

		}

	}

#endif



	if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) {

		struct nd_opt_hdr *p;

		for (p = ndopts.nd_opts_pi;