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      1 /*	$NetBSD: if_agrsoftc.c,v 1.4 2009/03/15 21:23:31 cegger 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 1.4 2009/03/15 21:23:31 cegger 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 }
     70