sys/net/if_clone.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      From: @(#)if.h  8.1 (Berkeley) 6/10/93
  30  * $FreeBSD: src/sys/net/if_var.h,v 1.18.2.16 2003/04/15 18:11:19 fjoe Exp $
  31  * $FreeBSD: src/sys/net/if.h,v 1.58.2.9 2002/08/30 14:23:38 sobomax Exp $
  32  */
  33
  34 #ifndef _NET_IF_CLONE_H_
  35 #define _NET_IF_CLONE_H_
  36
  37 #if __BSD_VISIBLE
  38 /*
  39  * Structure used to query names of interface cloners.
  40  */
  41 struct if_clonereq {
  42         int     ifcr_total;             /* total cloners (out) */
  43         int     ifcr_count;             /* room for this many in user buffer */
  44         char    *ifcr_buffer;           /* buffer for cloner names */
  45 };
  46 #endif /* __BSD_VISIBLE */
  47
  48 #ifdef _KERNEL
  49
  50 #include <sys/eventhandler.h>
  51 #include <sys/queue.h>
  52
  53 /*
  54  * Structure describing a `cloning' interface.
  55  */
  56 struct if_clone {
  57         LIST_ENTRY(if_clone) ifc_list;  /* on list of cloners */
  58         const char      *ifc_name;      /* name of device, e.g. `gif' */
  59         int             ifc_minifs;     /* minimum number of interfaces */
  60         int             ifc_maxunit;    /* maximum unit number */
  61         unsigned char   *ifc_units;     /* bitmap to handle units */
  62         int             ifc_bmlen;      /* bitmap length */
  63
  64         int             (*ifc_create)(struct if_clone *, int, caddr_t);
  65         int             (*ifc_destroy)(struct ifnet *);
  66 };
  67
  68 #define IF_CLONE_INITIALIZER(name, create, destroy, minifs, maxunit)    \
  69 { { 0 }, name, minifs, maxunit, NULL, 0, create, destroy }
  70
  71 /* interface clone event */
  72 typedef void (*if_clone_event_handler_t)(void *, struct if_clone *);
  73 EVENTHANDLER_DECLARE(if_clone_event, if_clone_event_handler_t);
  74
  75 int     if_clone_attach(struct if_clone *);
  76 void    if_clone_detach(struct if_clone *);
  77 int     if_clone_create(char *, int, caddr_t);
  78 int     if_clone_destroy(const char *);
  79 int     if_clone_list(struct if_clonereq *);
  80
  81 #endif  /* _KERNEL */
  82
  83 #endif /* !_NET_IF_CLONE_H_ */