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-rw-r--r--include/net/ndisc.h7
-rw-r--r--net/ipv6/ndisc.c17
2 files changed, 24 insertions, 0 deletions
diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 7af1ea893038..23b3a7c58783 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -78,6 +78,13 @@ struct ra_msg {
__be32 retrans_timer;
};
+struct rd_msg {
+ struct icmp6hdr icmph;
+ struct in6_addr target;
+ struct in6_addr dest;
+ __u8 opt[0];
+};
+
struct nd_opt_hdr {
__u8 nd_opt_type;
__u8 nd_opt_len;
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index f2a007b7bde3..6574175795df 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1314,6 +1314,12 @@ out:
static void ndisc_redirect_rcv(struct sk_buff *skb)
{
+ u8 *hdr;
+ struct ndisc_options ndopts;
+ struct rd_msg *msg = (struct rd_msg *)skb_transport_header(skb);
+ u32 ndoptlen = skb->tail - (skb->transport_header +
+ offsetof(struct rd_msg, opt));
+
#ifdef CONFIG_IPV6_NDISC_NODETYPE
switch (skb->ndisc_nodetype) {
case NDISC_NODETYPE_HOST:
@@ -1330,6 +1336,17 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
return;
}
+ if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts))
+ return;
+
+ if (!ndopts.nd_opts_rh)
+ return;
+
+ hdr = (u8 *)ndopts.nd_opts_rh;
+ hdr += 8;
+ if (!pskb_pull(skb, hdr - skb_transport_header(skb)))
+ return;
+
icmpv6_notify(skb, NDISC_REDIRECT, 0, 0);
}