commit de357cc01334a468e4d5b7ba66a17b0d3ca9d63e
author YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Sat Mar 15 23:59:18 2008 -0400
committer YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Thu Apr 03 10:06:01 2008 +0900
tree 8cae8de67f575dac77c265bf061f46820d6b8c68
parent 52eeeb8481d705e61e2e9aae974e7799a93783e9

[IPV6] NDISC: Don't rely on node-type hint from L2 unless required.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

net/ipv6/ndisc.c

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 16273e1..c400b87 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1092,11 +1092,13 @@
 		return;
 	}
 
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
 	if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) {
 		ND_PRINTK2(KERN_WARNING
 			   "ICMPv6 RA: from host or unauthorized router\n");
 		return;
 	}
+#endif
 
 	/*
 	 *	set the RA_RECV flag in the interface
@@ -1121,9 +1123,11 @@
 		return;
 	}
 
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
 	/* skip link-specific parameters from interior routers */
 	if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
 		goto skip_linkparms;
+#endif
 
 	if (in6_dev->if_flags & IF_RS_SENT) {
 		/*
@@ -1239,7 +1243,9 @@
 		}
 	}
 
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
 skip_linkparms:
+#endif
 
 	/*
 	 *	Process options.
@@ -1286,9 +1292,11 @@
 	}
 #endif
 
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
 	/* skip link-specific ndopts from interior routers */
 	if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
 		goto out;
+#endif
 
 	if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) {
 		struct nd_opt_hdr *p;
@@ -1353,6 +1361,7 @@
 	int optlen;
 	u8 *lladdr = NULL;
 
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
 	switch (skb->ndisc_nodetype) {
 	case NDISC_NODETYPE_HOST:
 	case NDISC_NODETYPE_NODEFAULT:
@@ -1360,6 +1369,7 @@
 			   "ICMPv6 Redirect: from host or unauthorized router\n");
 		return;
 	}
+#endif
 
 	if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
 		ND_PRINTK2(KERN_WARNING