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if_agrmonitor.c revision 1.1.6.2 
      1 /*	$NetBSD: if_agrmonitor.c,v 1.1.6.2 2005/04/29 11:29:32 kent 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 1.1.6.2 2005/04/29 11:29:32 kent Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 
     35 #include <net/if.h>
     36 #include <net/if_media.h>
     37 
     38 #include <net/agr/if_agrvar_impl.h>
     39 #include <net/agr/if_agrsubr.h>
     40 
     41 void
     42 agrport_monitor(struct agr_port *port)
     43 {
     44 	struct agr_softc *sc = AGR_SC_FROM_PORT(port);
     45 	u_int media;
     46 	u_int status;
     47 
     48 	/*
     49 	 * XXX XXX
     50 	 * assuming that it's safe to use SIOCGIFMEDIA from callout handler.
     51 	 * maybe it's better to have a worker thread.
     52 	 */
     53 
     54 	media = IFM_ETHER | IFM_NONE;
     55 	status = IFM_AVALID;
     56 	if ((~port->port_ifp->if_flags & (IFF_RUNNING | IFF_UP))
     57 	    == 0) {
     58 		int error;
     59 
     60 		error = agr_port_getmedia(port, &media, &status);
     61 		if (error) {
     62 #if defined(DEBUG)
     63 			printf("getmedia: error %d\n", error);
     64 #endif /* defined(DEBUG) */
     65 		}
     66 	}
     67 
     68 	if ((status & (IFM_AVALID | IFM_ACTIVE)) == IFM_AVALID) {
     69 		media = IFM_ETHER | IFM_NONE; /* XXX ether */
     70 	}
     71 
     72 	if (port->port_media == media) {
     73 		return;
     74 	}
     75 
     76 	port->port_media = media;
     77 	if (sc->sc_iftop->iftop_portstate) {
     78 		(*sc->sc_iftop->iftop_portstate)(port);
     79 	}
     80 }
     81