1db8d1f843
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)
46 lines
1.8 KiB
C
46 lines
1.8 KiB
C
/*-
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* Copyright (c) 2009-2010 Ana Kukec <anchie@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET6_SEND_H_
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#define _NETINET6_SEND_H_
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#define SND_OUT 0 /* Outgoing traffic */
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#define SND_IN 1 /* Incoming traffic. */
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struct sockaddr_send {
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unsigned char send_len; /* total length */
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sa_family_t send_family; /* address family */
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int send_direction;
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int send_ifidx;
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char send_zero[8];
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};
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extern int (*send_sendso_input_hook)(struct mbuf *, struct ifnet *, int, int);
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#endif /* _NETINET6_SEND_H_ */
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