blob: b24ee99002040b76d86062bdfc7bb69859982f99 (
plain)
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--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1105,6 +1105,18 @@ errout:
rtnl_set_sk_err(net, RTNLGRP_ND_USEROPT, err);
}
+static inline int accept_ra(struct inet6_dev *in6_dev)
+{
+ /*
+ * If forwarding is enabled, RA are not accepted unless the special
+ * hybrid mode (accept_ra=2) is enabled.
+ */
+ if (in6_dev->cnf.forwarding && in6_dev->cnf.accept_ra < 2)
+ return 0;
+
+ return in6_dev->cnf.accept_ra;
+}
+
static void ndisc_router_discovery(struct sk_buff *skb)
{
struct ra_msg *ra_msg = (struct ra_msg *)skb_transport_header(skb);
@@ -1150,7 +1162,7 @@ static void ndisc_router_discovery(struc
skb->dev->name);
return;
}
- if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_ra) {
+ if (!accept_ra(in6_dev)) {
in6_dev_put(in6_dev);
return;
}
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