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authorDavid S. Miller <davem@davemloft.net>2008-04-08 02:33:36 -0700
committerDavid S. Miller <davem@davemloft.net>2008-04-08 02:33:36 -0700
commit8eefca4888c986d993b2571eb31f0397a5d0a178 (patch)
treeadc659aba0eaaaaa3d33db20d7c759dfc5f0669b /net/ipv6/ndisc.c
parent549e028d012fab01e5726943d4afecd0c33d64e6 (diff)
parentde357cc01334a468e4d5b7ba66a17b0d3ca9d63e (diff)
downloadlinux-2.6.38-lt-ux500-8eefca4888c986d993b2571eb31f0397a5d0a178.tar.gz
Merge branch 'net-2.6.26-isatap-20080403' of git://git.linux-ipv6.org/gitroot/yoshfuji/linux-2.6-dev
Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r--net/ipv6/ndisc.c42
1 files changed, 41 insertions, 1 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 06d80c6dc5c..b3295d82fec 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1093,6 +1093,14 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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
*/
@@ -1116,6 +1124,12 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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) {
/*
* flag that an RA was received after an RS was sent
@@ -1230,6 +1244,10 @@ skip_defrtr:
}
}
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+skip_linkparms:
+#endif
+
/*
* Process options.
*/
@@ -1261,7 +1279,13 @@ skip_defrtr:
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)
+ struct route_info *ri = (struct route_info *)p;
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT &&
+ ri->prefix_len == 0)
+ continue;
+#endif
+ if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
continue;
rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,
&ipv6_hdr(skb)->saddr);
@@ -1269,6 +1293,12 @@ skip_defrtr:
}
#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;
for (p = ndopts.nd_opts_pi;
@@ -1332,6 +1362,16 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
int optlen;
u8 *lladdr = NULL;
+#ifdef CONFIG_IPV6_NDISC_NODETYPE
+ switch (skb->ndisc_nodetype) {
+ case NDISC_NODETYPE_HOST:
+ case NDISC_NODETYPE_NODEFAULT:
+ ND_PRINTK2(KERN_WARNING
+ "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
"ICMPv6 Redirect: source address is not link-local.\n");