MFp4: anchie_soc2009 branch:

Add kernel side support for Secure Neighbor Discovery (SeND), RFC 3971.

The implementation consists of a kernel module that gets packets from
the nd6 code, sends them to user space on a dedicated socket and reinjects
them back for further processing.

Hooks are used from nd6 code paths to divert relevant packets to the
send implementation for processing in user space.  The hooks are only
triggered if the send module is loaded. In case no user space
application is connected to the send socket, processing continues
normaly as if the module would not be loaded. Unloading the module
is not possible at this time due to missing nd6 locking.

The native SeND socket is similar to a raw IPv6 socket but with its own,
internal pseudo-protocol.

Approved by:	bz (mentor)

1 files changed, 45 insertions, 0 deletions

diff --git a/sys/netinet6/send.h b/sys/netinet6/send.h
new file mode 100644
index 0000000..36ba571
--- /dev/null
+++ b/sys/netinet6/send.h
@@ -0,0 +1,45 @@
+/*-
+ * Copyright (c) 2009-2010 Ana Kukec <anchie@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _NETINET6_SEND_H_
+#define _NETINET6_SEND_H_
+
+#define	SND_OUT		0	/* Outgoing traffic */
+#define	SND_IN		1	/* Incoming traffic. */
+
+struct sockaddr_send {
+	unsigned char		send_len;	/* total length */
+	sa_family_t		send_family;	/* address family */
+	int			send_direction;
+	int			send_ifidx;
+	char			send_zero[8];
+};
+
+extern int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
+
+#endif /* _NETINET6_SEND_H_ */