1 files changed, 45 insertions, 4 deletions

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index cb8856b1d951..dfa20d3be9b6 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -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,
@@ -1019,10 +1030,11 @@ static void ndisc_router_discovery(struct sk_buff *skb)
         struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
 	struct neighbour *neigh = NULL;
 	struct inet6_dev *in6_dev;
-	struct rt6_info *rt;
+	struct rt6_info *rt = NULL;
 	int lifetime;
 	struct ndisc_options ndopts;
 	int optlen;
+	unsigned int pref = 0;
 
 	__u8 * opt = (__u8 *)(ra_msg + 1);
 
@@ -1081,8 +1093,19 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 				(ra_msg->icmph.icmp6_addrconf_other ?
 					IF_RA_OTHERCONF : 0);
 
+	if (!in6_dev->cnf.accept_ra_defrtr)
+		goto skip_defrtr;
+
 	lifetime = ntohs(ra_msg->icmph.icmp6_rt_lifetime);
 
+#ifdef CONFIG_IPV6_ROUTER_PREF
+	pref = ra_msg->icmph.icmp6_router_pref;
+	/* 10b is handled as if it were 00b (medium) */
+	if (pref == ICMPV6_ROUTER_PREF_INVALID ||
+	    in6_dev->cnf.accept_ra_rtr_pref)
+		pref = ICMPV6_ROUTER_PREF_MEDIUM;
+#endif
+
 	rt = rt6_get_dflt_router(&skb->nh.ipv6h->saddr, skb->dev);
 
 	if (rt)
@@ -1098,7 +1121,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 		ND_PRINTK3(KERN_DEBUG
 			   "ICMPv6 RA: adding default router.\n");
 
-		rt = rt6_add_dflt_router(&skb->nh.ipv6h->saddr, skb->dev);
+		rt = rt6_add_dflt_router(&skb->nh.ipv6h->saddr, skb->dev, pref);
 		if (rt == NULL) {
 			ND_PRINTK0(KERN_ERR
 				   "ICMPv6 RA: %s() failed to add default route.\n",
@@ -1117,6 +1140,8 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			return;
 		}
 		neigh->flags |= NTF_ROUTER;
+	} else if (rt) {
+		rt->rt6i_flags |= (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref);
 	}
 
 	if (rt)
@@ -1128,6 +1153,8 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			rt->u.dst.metrics[RTAX_HOPLIMIT-1] = ra_msg->icmph.icmp6_hop_limit;
 	}
 
+skip_defrtr:
+
 	/*
 	 *	Update Reachable Time and Retrans Timer
 	 */
@@ -1186,7 +1213,21 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			     NEIGH_UPDATE_F_ISROUTER);
 	}
 
-	if (ndopts.nd_opts_pi) {
+#ifdef CONFIG_IPV6_ROUTE_INFO
+	if (in6_dev->cnf.accept_ra_rtr_pref && 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)) {
+			if (((struct route_info *)p)->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
+				continue;
+			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;
 		     p;