sys/net/agr/if_agrsoftc.c

   1 /*      $NetBSD: if_agrsoftc.c,v 1.3 2005/11/23 09:43:37 yamt Exp $     */
   2
   3 /*-
   4  * Copyright (c)2005 YAMAMOTO Takashi,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD: if_agrsoftc.c,v 1.3 2005/11/23 09:43:37 yamt Exp $");
  31
  32 #include <sys/param.h>
  33 #include <sys/callout.h>
  34 #include <sys/malloc.h>
  35
  36 #include <net/if.h>
  37 #include <net/if_ether.h>
  38
  39 #include <net/agr/if_agrvar_impl.h>
  40
  41 /*
  42  * these functions are isolated from if_agr.c to avoid inclusion of if_ether.h.
  43  */
  44
  45 struct agr_softc *
  46 agr_alloc_softc(void)
  47 {
  48         struct agr_softc *sc;
  49         union {
  50                 struct ifnet u_if;
  51                 struct ethercom u_ec;
  52         } *u;
  53
  54         /*
  55          * as we don't know our if_type yet..
  56          */
  57
  58         sc = malloc(sizeof(*sc) - sizeof(sc->sc_if) + sizeof(*u),
  59             M_DEVBUF, M_WAITOK | M_ZERO);
  60
  61         return sc;
  62 }
  63
  64 void
  65 agr_free_softc(struct agr_softc *sc)
  66 {
  67
  68         free(sc, M_DEVBUF);
  69 }