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-rw-r--r--net/ipv6/raw.c40
1 files changed, 32 insertions, 8 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index a58459a76684..e27383d855de 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -49,7 +49,7 @@
#include <net/udp.h>
#include <net/inet_common.h>
#include <net/tcp_states.h>
-#ifdef CONFIG_IPV6_MIP6
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
#include <net/mip6.h>
#endif
@@ -137,6 +137,28 @@ static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
return 0;
}
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
+
+int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
+ struct sk_buff *skb))
+{
+ rcu_assign_pointer(mh_filter, filter);
+ return 0;
+}
+EXPORT_SYMBOL(rawv6_mh_filter_register);
+
+int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
+ struct sk_buff *skb))
+{
+ rcu_assign_pointer(mh_filter, NULL);
+ synchronize_rcu();
+ return 0;
+}
+EXPORT_SYMBOL(rawv6_mh_filter_unregister);
+
+#endif
+
/*
* demultiplex raw sockets.
* (should consider queueing the skb in the sock receive_queue
@@ -178,16 +200,22 @@ int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
case IPPROTO_ICMPV6:
filtered = icmpv6_filter(sk, skb);
break;
-#ifdef CONFIG_IPV6_MIP6
+
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
case IPPROTO_MH:
+ {
/* XXX: To validate MH only once for each packet,
* this is placed here. It should be after checking
* xfrm policy, however it doesn't. The checking xfrm
* policy is placed in rawv6_rcv() because it is
* required for each socket.
*/
- filtered = mip6_mh_filter(sk, skb);
+ int (*filter)(struct sock *sock, struct sk_buff *skb);
+
+ filter = rcu_dereference(mh_filter);
+ filtered = filter ? filter(sk, skb) : 0;
break;
+ }
#endif
default:
filtered = 0;
@@ -611,9 +639,7 @@ static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
struct iovec *iov;
u8 __user *type = NULL;
u8 __user *code = NULL;
-#ifdef CONFIG_IPV6_MIP6
u8 len = 0;
-#endif
int probed = 0;
int i;
@@ -646,7 +672,6 @@ static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
probed = 1;
}
break;
-#ifdef CONFIG_IPV6_MIP6
case IPPROTO_MH:
if (iov->iov_base && iov->iov_len < 1)
break;
@@ -660,7 +685,6 @@ static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
len += iov->iov_len;
break;
-#endif
default:
probed = 1;
break;
@@ -1256,7 +1280,7 @@ static int raw6_seq_show(struct seq_file *seq, void *v)
return 0;
}
-static struct seq_operations raw6_seq_ops = {
+static const struct seq_operations raw6_seq_ops = {
.start = raw6_seq_start,
.next = raw6_seq_next,
.stop = raw6_seq_stop,