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/*
* ip tunnel device for MacOSX. This is the protocol module for PF_INET.
*/
/*
* Copyright (c) 2011 Mattias Nissler <mattias.nissler@gmx.de>
*
* 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.
* 3. The name of the author may not be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
#include <sys/kpi_mbuf.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <net/kpi_protocol.h>
#include <net/kpi_interface.h>
static errno_t
tun_inet_input(ifnet_t ifp, protocol_family_t protocol, mbuf_t m, char *header)
{
/* input the packet */
return proto_input(PF_INET, m);
}
static errno_t
tun_inet_pre_output(ifnet_t ifp, protocol_family_t proto, mbuf_t *packet,
const struct sockaddr *dest, void *route, char *frame_type, char *dst_addr)
{
/* check wether the destination address is an inet address */
if (dest->sa_family != AF_INET)
return EAFNOSUPPORT;
/* place the address family as frame type */
*((uint32_t *) frame_type) = htonl(AF_INET);
return 0;
}
errno_t
tun_inet_attach(ifnet_t ifp, protocol_family_t proto)
{
struct ifnet_attach_proto_param pr;
struct ifnet_demux_desc ddesc[1];
/* fill out pr and attach the protocol */
ddesc[0].type = AF_INET;
ddesc[0].data = NULL;
ddesc[0].datalen = 0;
pr.demux_array = ddesc;
pr.demux_count = 1;
pr.input = tun_inet_input;
pr.pre_output = tun_inet_pre_output;
pr.event = NULL;
pr.ioctl = NULL;
pr.detached = NULL;
pr.resolve = NULL;
pr.send_arp = NULL;
return ifnet_attach_protocol(ifp, proto, &pr);
}
void
tun_inet_detach(ifnet_t ifp, protocol_family_t proto)
{
/* just detach the protocol */
ifnet_detach_protocol(ifp, proto);
}
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