104 lines
3.7 KiB
C++
104 lines
3.7 KiB
C++
/*
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* ethertap device for MacOSX.
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*/
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/*
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* Copyright (c) 2011 Mattias Nissler <mattias.nissler@gmx.de>
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted
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* provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) 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 OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __TAP_H__
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#define __TAP_H__
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#include "tuntap.h"
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#define TAP_FAMILY_NAME ((char *) "zt")
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#define TAP_IF_COUNT 16 /* max number of tap interfaces */
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#define TAP_MTU 2800
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#define TAP_LLADDR tap_lladdr
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/* the mac address of our interfaces. note that the last byte will be replaced by the unit number */
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extern u_char tap_lladdr[];
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/* tap manager */
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class tap_manager : public tuntap_manager {
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protected:
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/* just define the interface creation method */
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virtual tuntap_interface *create_interface();
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};
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/* the tap network interface */
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class tap_interface : public tuntap_interface {
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protected:
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/* maximum number of protocols that can be attached */
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static const unsigned int MAX_ATTACHED_PROTOS = 8;
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/* information about attached protocols for demuxing is stored here */
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struct {
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/* whether this entry is used */
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bool used;
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/* type in the ethernet header */
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u_int16_t type;
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/* protocol passed to add_proto */
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protocol_family_t proto;
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} attached_protos[MAX_ATTACHED_PROTOS];
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/* initializes the interface */
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virtual bool initialize(unsigned short major, unsigned short unit);
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/* shuts the interface down */
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virtual void shutdown();
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/* called when the character device is opened in order to intialize the network
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* interface.
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*/
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virtual int initialize_interface();
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/* called when the character device is closed to shutdown the network interface */
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virtual void shutdown_interface();
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/* override interface routines */
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virtual errno_t if_ioctl(u_int32_t cmd, void *arg);
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virtual errno_t if_demux(mbuf_t m, char *header, protocol_family_t *proto);
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virtual errno_t if_framer(mbuf_t *m, const struct sockaddr *dest,
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const char *dest_linkaddr, const char *frame_type);
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virtual errno_t if_add_proto(protocol_family_t proto,
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const struct ifnet_demux_desc *ddesc, u_int32_t ndesc);
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virtual errno_t if_del_proto(protocol_family_t proto);
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virtual errno_t if_check_multi(const struct sockaddr *maddr);
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/* if_add_proto helper */
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errno_t add_one_proto(protocol_family_t proto, const struct ifnet_demux_desc &dd);
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/* generates a kernel event */
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void generate_link_event(u_int32_t code);
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friend class tap_manager;
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};
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#endif /* __TAP_H__ */
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