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if_agrmonitor.c revision 1.1.4.3 
      1 /*	$NetBSD: if_agrmonitor.c,v 1.1.4.3 2005/11/10 14:10:50 skrll 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_agrmonitor.c,v 1.1.4.3 2005/11/10 14:10:50 skrll Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/callout.h>
     34 #include <sys/systm.h>
     35 
     36 #include <net/if.h>
     37 #include <net/if_media.h>
     38 
     39 #include <net/agr/if_agrvar_impl.h>
     40 #include <net/agr/if_agrsubr.h>
     41 
     42 void
     43 agrport_monitor(struct agr_port *port)
     44 {
     45 	struct agr_softc *sc = AGR_SC_FROM_PORT(port);
     46 	u_int media;
     47 	u_int status;
     48 
     49 	/*
     50 	 * XXX XXX
     51 	 * assuming that it's safe to use SIOCGIFMEDIA from callout handler.
     52 	 * maybe it's better to have a worker thread.
     53 	 */
     54 
     55 	media = IFM_ETHER | IFM_NONE;
     56 	status = IFM_AVALID;
     57 	if ((~port->port_ifp->if_flags & (IFF_RUNNING | IFF_UP))
     58 	    == 0) {
     59 		int error;
     60 
     61 		error = agr_port_getmedia(port, &media, &status);
     62 		if (error) {
     63 #if defined(DEBUG)
     64 			printf("getmedia: error %d\n", error);
     65 #endif /* defined(DEBUG) */
     66 		}
     67 	}
     68 
     69 	if ((status & (IFM_AVALID | IFM_ACTIVE)) == IFM_AVALID) {
     70 		media = IFM_ETHER | IFM_NONE; /* XXX ether */
     71 	}
     72 
     73 	if (port->port_media == media) {
     74 		return;
     75 	}
     76 
     77 	port->port_media = media;
     78 	if (sc->sc_iftop->iftop_portstate) {
     79 		(*sc->sc_iftop->iftop_portstate)(port);
     80 	}
     81 }
     82