[apple/xnu.git] / bsd / net / if_media.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*	$NetBSD: if_media.c,v 1.1 1997/03/17 02:55:15 thorpej Exp $	*/
/* $FreeBSD: src/sys/net/if_media.c,v 1.9.2.4 2001/07/04 00:12:38 brooks Exp $ */

/*
 * Copyright (c) 1997
 *	Jonathan Stone and Jason R. Thorpe.  All rights reserved.
 *
 * This software is derived from information provided by Matt Thomas.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Jonathan Stone
 *	and Jason R. Thorpe for the NetBSD Project.
 * 4. The names of the authors may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * BSD/OS-compatible network interface media selection.
 *
 * Where it is safe to do so, this code strays slightly from the BSD/OS
 * design.  Software which uses the API (device drivers, basically)
 * shouldn't notice any difference.
 *
 * Many thanks to Matt Thomas for providing the information necessary
 * to implement this interface.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/malloc.h>

#include <net/if.h>
#include <net/if_media.h>

/*
 * Compile-time options:
 * IFMEDIA_DEBUG:
 *	turn on implementation-level debug printfs.
 * 	Useful for debugging newly-ported  drivers.
 */

static struct ifmedia_entry *ifmedia_match __P((struct ifmedia *ifm,
    int flags, int mask));

#ifdef IFMEDIA_DEBUG
int	ifmedia_debug = 0;
static	void ifmedia_printword __P((int));
#endif

/*
 * Initialize if_media struct for a specific interface instance.
 */
void
ifmedia_init(ifm, dontcare_mask, change_callback, status_callback)
	struct ifmedia *ifm;
	int dontcare_mask;
	ifm_change_cb_t change_callback;
	ifm_stat_cb_t status_callback;
{

	LIST_INIT(&ifm->ifm_list);
	ifm->ifm_cur = NULL;
	ifm->ifm_media = 0;
	ifm->ifm_mask = dontcare_mask;		/* IF don't-care bits */
	ifm->ifm_change = change_callback;
	ifm->ifm_status = status_callback;
}

void
ifmedia_removeall(ifm)
	struct ifmedia *ifm;
{
	struct ifmedia_entry *entry;

	for (entry = LIST_FIRST(&ifm->ifm_list); entry;
	     entry = LIST_FIRST(&ifm->ifm_list)) {
		LIST_REMOVE(entry, ifm_list);
		FREE(entry, M_IFADDR);
	}
}

/*
 * Add a media configuration to the list of supported media
 * for a specific interface instance.
 */
void
ifmedia_add(ifm, mword, data, aux)
	struct ifmedia *ifm;
	int mword;
	int data;
	void *aux;
{
	register struct ifmedia_entry *entry;

#ifdef IFMEDIA_DEBUG
	if (ifmedia_debug) {
		if (ifm == NULL) {
			printf("ifmedia_add: null ifm\n");
			return;
		}
		printf("Adding entry for ");
		ifmedia_printword(mword);
	}
#endif

	entry = _MALLOC(sizeof(*entry), M_IFADDR, M_NOWAIT);
	if (entry == NULL)
		panic("ifmedia_add: can't malloc entry");

	entry->ifm_media = mword;
	entry->ifm_data = data;
	entry->ifm_aux = aux;

	LIST_INSERT_HEAD(&ifm->ifm_list, entry, ifm_list);
}

/*
 * Add an array of media configurations to the list of
 * supported media for a specific interface instance.
 */
void
ifmedia_list_add(ifm, lp, count)
	struct ifmedia *ifm;
	struct ifmedia_entry *lp;
	int count;
{
	int i;

	for (i = 0; i < count; i++)
		ifmedia_add(ifm, lp[i].ifm_media, lp[i].ifm_data,
		    lp[i].ifm_aux);
}

/*
 * Set the default active media. 
 *
 * Called by device-specific code which is assumed to have already
 * selected the default media in hardware.  We do _not_ call the
 * media-change callback.
 */
void
ifmedia_set(ifm, target)
	struct ifmedia *ifm; 
	int target;

{
	struct ifmedia_entry *match;

	match = ifmedia_match(ifm, target, ifm->ifm_mask);

	if (match == NULL) {
		printf("ifmedia_set: no match for 0x%x/0x%x\n",
		    target, ~ifm->ifm_mask);
		panic("ifmedia_set");
	}
	ifm->ifm_cur = match;

#ifdef IFMEDIA_DEBUG
	if (ifmedia_debug) {
		printf("ifmedia_set: target ");
		ifmedia_printword(target);
		printf("ifmedia_set: setting to ");
		ifmedia_printword(ifm->ifm_cur->ifm_media);
	}
#endif
}

/*
 * Device-independent media ioctl support function.
 */
int
ifmedia_ioctl(ifp, ifr, ifm, cmd)
	struct ifnet *ifp;
	struct ifreq *ifr;
	struct ifmedia *ifm;
	u_long cmd;
{
	struct ifmedia_entry *match;
	struct ifmediareq *ifmr = (struct ifmediareq *) ifr;
	int error = 0, sticky;

	if (ifp == NULL || ifr == NULL || ifm == NULL)
		return(EINVAL);

	switch (cmd) {

	/*
	 * Set the current media.
	 */
	case  SIOCSIFMEDIA:
	{
		struct ifmedia_entry *oldentry;
		int oldmedia;
		int newmedia = ifr->ifr_media;

		match = ifmedia_match(ifm, newmedia, ifm->ifm_mask);
		if (match == NULL) {
#ifdef IFMEDIA_DEBUG
			if (ifmedia_debug) {
				printf(
				    "ifmedia_ioctl: no media found for 0x%x\n", 
				    newmedia);
			}
#endif
			return (ENXIO);
		}

		/*
		 * If no change, we're done.
		 * XXX Automedia may invole software intervention.
		 *     Keep going in case the the connected media changed.
		 *     Similarly, if best match changed (kernel debugger?).
		 */
		if ((IFM_SUBTYPE(newmedia) != IFM_AUTO) &&
		    (newmedia == ifm->ifm_media) &&
		    (match == ifm->ifm_cur))
			return 0;

		/*
		 * We found a match, now make the driver switch to it.
		 * Make sure to preserve our old media type in case the
		 * driver can't switch.
		 */
#ifdef IFMEDIA_DEBUG
		if (ifmedia_debug) {
			printf("ifmedia_ioctl: switching %s to ",
			    ifp->if_xname);
			ifmedia_printword(match->ifm_media);
		}
#endif
		oldentry = ifm->ifm_cur;
		oldmedia = ifm->ifm_media;
		ifm->ifm_cur = match;
		ifm->ifm_media = newmedia;
		error = (*ifm->ifm_change)(ifp);
		if (error) {
			ifm->ifm_cur = oldentry;
			ifm->ifm_media = oldmedia;
		}
		break;
	}

	/*
	 * Get list of available media and current media on interface.
	 */
	case  SIOCGIFMEDIA: 
	{
		struct ifmedia_entry *ep;
		int *kptr, count;
		int usermax;	/* user requested max */

		kptr = NULL;		/* XXX gcc */

		ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
		    ifm->ifm_cur->ifm_media : IFM_NONE;
		ifmr->ifm_mask = ifm->ifm_mask;
		ifmr->ifm_status = 0;
		(*ifm->ifm_status)(ifp, ifmr);

		count = 0;
		usermax = 0;

		/*
		 * If there are more interfaces on the list, count
		 * them.  This allows the caller to set ifmr->ifm_count
		 * to 0 on the first call to know how much space to
		 * allocate.
		 */
		LIST_FOREACH(ep, &ifm->ifm_list, ifm_list)
			usermax++;

		/*
		 * Don't allow the user to ask for too many
		 * or a negative number.
		 */
		if (ifmr->ifm_count > usermax)
			ifmr->ifm_count = usermax;
		else if (ifmr->ifm_count < 0)
			return (EINVAL);

		if (ifmr->ifm_count != 0) {
			kptr = (int *) _MALLOC(ifmr->ifm_count * sizeof(int),
			    M_TEMP, M_WAITOK);

			/*
			 * Get the media words from the interface's list.
			 */
			ep = LIST_FIRST(&ifm->ifm_list);
			for (; ep != NULL && count < ifmr->ifm_count;
			    ep = LIST_NEXT(ep, ifm_list), count++)
				kptr[count] = ep->ifm_media;

			if (ep != NULL)
				error = E2BIG;	/* oops! */
		} else {
			count = usermax;
		}

		/*
		 * We do the copyout on E2BIG, because that's
		 * just our way of telling userland that there
		 * are more.  This is the behavior I've observed
		 * under BSD/OS 3.0
		 */
		sticky = error;
		if ((error == 0 || error == E2BIG) && ifmr->ifm_count != 0) {
			error = copyout((caddr_t)kptr,
			    (caddr_t)ifmr->ifm_ulist,
			    ifmr->ifm_count * sizeof(int));
		}

		if (error == 0)
			error = sticky;

		if (ifmr->ifm_count != 0)
			FREE(kptr, M_TEMP);

		ifmr->ifm_count = count;
		break;
	}

	default:
		return (EINVAL);
	}

	return (error);
}

/*
 * Find media entry matching a given ifm word.
 *
 */
static struct ifmedia_entry *
ifmedia_match(ifm, target, mask)
	struct ifmedia *ifm; 
	int target;
	int mask;
{
	struct ifmedia_entry *match, *next;

	match = NULL;
	mask = ~mask;

	LIST_FOREACH(next, &ifm->ifm_list, ifm_list) {
		if ((next->ifm_media & mask) == (target & mask)) {
#if defined(IFMEDIA_DEBUG) || defined(DIAGNOSTIC)
			if (match) {
				printf("ifmedia_match: multiple match for "
				    "0x%x/0x%x\n", target, mask);
			}
#endif
			match = next;
		}
	}

	return match;
}

#ifdef IFMEDIA_DEBUG
struct ifmedia_description ifm_type_descriptions[] =
    IFM_TYPE_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
    IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
    IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
    IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
    IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_fddi_descriptions[] =
    IFM_SUBTYPE_FDDI_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
    IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_80211_descriptions[] =
    IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_80211_option_descriptions[] =
    IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;

struct ifmedia_description ifm_subtype_shared_descriptions[] =
    IFM_SUBTYPE_SHARED_DESCRIPTIONS;

struct ifmedia_description ifm_shared_option_descriptions[] =
    IFM_SHARED_OPTION_DESCRIPTIONS;

struct ifmedia_type_to_subtype {
	struct ifmedia_description *subtypes;
	struct ifmedia_description *options;
};

/* must be in the same order as IFM_TYPE_DESCRIPTIONS */
struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
	{
	  &ifm_subtype_ethernet_descriptions[0],
	  &ifm_subtype_ethernet_option_descriptions[0]
	},
	{
	  &ifm_subtype_tokenring_descriptions[0],
	  &ifm_subtype_tokenring_option_descriptions[0]
	},
	{
	  &ifm_subtype_fddi_descriptions[0],
	  &ifm_subtype_fddi_option_descriptions[0]
	},
	{
	  &ifm_subtype_80211_descriptions[0],
	  &ifm_subtype_80211_option_descriptions[0]
	},
};

/*
 * print a media word.
 */
static void
ifmedia_printword(ifmw)
	int ifmw;
{
	struct ifmedia_description *desc;
	struct ifmedia_type_to_subtype *ttos;
	int seen_option = 0;

	/* Find the top-level interface type. */
	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
	    desc->ifmt_string != NULL; desc++, ttos++)
		if (IFM_TYPE(ifmw) == desc->ifmt_word)
			break;
	if (desc->ifmt_string == NULL) {
		printf("<unknown type>\n");
		return;
	}
	printf(desc->ifmt_string);

	/*
	 * Check for the shared subtype descriptions first, then the
	 * type-specific ones.
	 */
	for (desc = ifm_subtype_shared_descriptions;
	    desc->ifmt_string != NULL; desc++)
		if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
			goto got_subtype;

	for (desc = ttos->subtypes; desc->ifmt_string != NULL; desc++)
		if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
			break;
	if (desc->ifmt_string == NULL) {
		printf(" <unknown subtype>\n");
		return;
	}

 got_subtype:
	printf(" %s", desc->ifmt_string);

	/*
	 * Look for shared options.
	 */
	for (desc = ifm_shared_option_descriptions;
	    desc->ifmt_string != NULL; desc++) {
		if (ifmw & desc->ifmt_word) {
			if (seen_option == 0)
				printf(" <");
			printf("%s%s", seen_option++ ? "," : "",
			    desc->ifmt_string);
		}
	}

	/*
	 * Look for subtype-specific options.
	 */
	for (desc = ttos->options; desc->ifmt_string != NULL; desc++) {
		if (ifmw & desc->ifmt_word) {
			if (seen_option == 0)
				printf(" <");
			printf("%s%s", seen_option++ ? "," : "",
			    desc->ifmt_string); 
		}
	}
	printf("%s\n", seen_option ? ">" : "");
}
#endif /* IFMEDIA_DEBUG */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* $NetBSD: if_media.c,v 1.1 1997/03/17 02:55:15 thorpej Exp $ */
9bccf70c	23	/* $FreeBSD: src/sys/net/if_media.c,v 1.9.2.4 2001/07/04 00:12:38 brooks Exp $ */
1c79356b A	24
	25	/*
	26	* Copyright (c) 1997
	27	* Jonathan Stone and Jason R. Thorpe. All rights reserved.
	28	*
	29	* This software is derived from information provided by Matt Thomas.
	30	*
	31	* Redistribution and use in source and binary forms, with or without
	32	* modification, are permitted provided that the following conditions
	33	* are met:
	34	* 1. Redistributions of source code must retain the above copyright
	35	* notice, this list of conditions and the following disclaimer.
	36	* 2. Redistributions in binary form must reproduce the above copyright
	37	* notice, this list of conditions and the following disclaimer in the
	38	* documentation and/or other materials provided with the distribution.
	39	* 3. All advertising materials mentioning features or use of this software
	40	* must display the following acknowledgement:
	41	* This product includes software developed by Jonathan Stone
	42	* and Jason R. Thorpe for the NetBSD Project.
	43	* 4. The names of the authors may not be used to endorse or promote products
	44	* derived from this software without specific prior written permission.
	45	*
	46	* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
	47	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	48	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	49	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	50	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	51	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	52	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	53	* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	54	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	55	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	56	* SUCH DAMAGE.
	57	*/
	58
	59	/*
	60	* BSD/OS-compatible network interface media selection.
	61	*
	62	* Where it is safe to do so, this code strays slightly from the BSD/OS
	63	* design. Software which uses the API (device drivers, basically)
	64	* shouldn't notice any difference.
	65	*
	66	* Many thanks to Matt Thomas for providing the information necessary
	67	* to implement this interface.
	68	*/
	69
	70	#include <sys/param.h>
	71	#include <sys/systm.h>
	72	#include <sys/socket.h>
	73	#include <sys/sockio.h>
	74	#include <sys/malloc.h>
	75
	76	#include <net/if.h>
	77	#include <net/if_media.h>
	78
	79	/*
	80	* Compile-time options:
	81	* IFMEDIA_DEBUG:
	82	* turn on implementation-level debug printfs.
	83	* Useful for debugging newly-ported drivers.
	84	*/
	85
	86	static struct ifmedia_entry ifmedia_match __P((struct ifmedia ifm,
	87	int flags, int mask));
88
89	#ifdef IFMEDIA_DEBUG
90	int ifmedia_debug = 0;
91	static void ifmedia_printword __P((int));
92	#endif
93
94	/*
95	* Initialize if_media struct for a specific interface instance.
96	*/
97	void
98	ifmedia_init(ifm, dontcare_mask, change_callback, status_callback)
99	struct ifmedia *ifm;
100	int dontcare_mask;
101	ifm_change_cb_t change_callback;
102	ifm_stat_cb_t status_callback;
103	{
104
105	LIST_INIT(&ifm->ifm_list);
106	ifm->ifm_cur = NULL;
107	ifm->ifm_media = 0;
108	ifm->ifm_mask = dontcare_mask; /* IF don't-care bits */
109	ifm->ifm_change = change_callback;
110	ifm->ifm_status = status_callback;
111	}
112
9bccf70c A	113	void
	114	ifmedia_removeall(ifm)
	115	struct ifmedia *ifm;
	116	{
	117	struct ifmedia_entry *entry;
	118
	119	for (entry = LIST_FIRST(&ifm->ifm_list); entry;
	120	entry = LIST_FIRST(&ifm->ifm_list)) {
	121	LIST_REMOVE(entry, ifm_list);
	122	FREE(entry, M_IFADDR);
	123	}
	124	}
	125
1c79356b A	126	/*
	127	* Add a media configuration to the list of supported media
	128	* for a specific interface instance.
	129	*/
	130	void
	131	ifmedia_add(ifm, mword, data, aux)
	132	struct ifmedia *ifm;
	133	int mword;
	134	int data;
	135	void *aux;
	136	{
	137	register struct ifmedia_entry *entry;
	138
	139	#ifdef IFMEDIA_DEBUG
	140	if (ifmedia_debug) {
	141	if (ifm == NULL) {
	142	printf("ifmedia_add: null ifm\n");
	143	return;
	144	}
	145	printf("Adding entry for ");
	146	ifmedia_printword(mword);
	147	}
	148	#endif
	149
9bccf70c	150	entry = _MALLOC(sizeof(*entry), M_IFADDR, M_NOWAIT);
1c79356b A	151	if (entry == NULL)
	152	panic("ifmedia_add: can't malloc entry");
	153
	154	entry->ifm_media = mword;
	155	entry->ifm_data = data;
	156	entry->ifm_aux = aux;
	157
	158	LIST_INSERT_HEAD(&ifm->ifm_list, entry, ifm_list);
	159	}
	160
	161	/*
	162	* Add an array of media configurations to the list of
	163	* supported media for a specific interface instance.
	164	*/
	165	void
	166	ifmedia_list_add(ifm, lp, count)
	167	struct ifmedia *ifm;
	168	struct ifmedia_entry *lp;
	169	int count;
	170	{
	171	int i;
	172
	173	for (i = 0; i < count; i++)
	174	ifmedia_add(ifm, lp[i].ifm_media, lp[i].ifm_data,
	175	lp[i].ifm_aux);
	176	}
	177
	178	/*
	179	* Set the default active media.
	180	*
	181	* Called by device-specific code which is assumed to have already
	182	* selected the default media in hardware. We do _not_ call the
	183	* media-change callback.
	184	*/
	185	void
	186	ifmedia_set(ifm, target)
	187	struct ifmedia *ifm;
	188	int target;
	189
	190	{
	191	struct ifmedia_entry *match;
	192
	193	match = ifmedia_match(ifm, target, ifm->ifm_mask);
	194
	195	if (match == NULL) {
	196	printf("ifmedia_set: no match for 0x%x/0x%x\n",
	197	target, ~ifm->ifm_mask);
	198	panic("ifmedia_set");
	199	}
	200	ifm->ifm_cur = match;
	201
	202	#ifdef IFMEDIA_DEBUG
	203	if (ifmedia_debug) {
	204	printf("ifmedia_set: target ");
	205	ifmedia_printword(target);
	206	printf("ifmedia_set: setting to ");
	207	ifmedia_printword(ifm->ifm_cur->ifm_media);
	208	}
	209	#endif
	210	}
	211
	212	/*
	213	* Device-independent media ioctl support function.
	214	*/
215	int
216	ifmedia_ioctl(ifp, ifr, ifm, cmd)
217	struct ifnet *ifp;
218	struct ifreq *ifr;
219	struct ifmedia *ifm;
220	u_long cmd;
221	{
222	struct ifmedia_entry *match;
223	struct ifmediareq ifmr = (struct ifmediareq ) ifr;
224	int error = 0, sticky;
225
226	if (ifp == NULL \|\| ifr == NULL \|\| ifm == NULL)
227	return(EINVAL);
228
229	switch (cmd) {
230
231	/*
232	* Set the current media.
233	*/
234	case SIOCSIFMEDIA:
235	{
236	struct ifmedia_entry *oldentry;
237	int oldmedia;
238	int newmedia = ifr->ifr_media;
239
240	match = ifmedia_match(ifm, newmedia, ifm->ifm_mask);
241	if (match == NULL) {
242	#ifdef IFMEDIA_DEBUG
243	if (ifmedia_debug) {
244	printf(
245	"ifmedia_ioctl: no media found for 0x%x\n",
246	newmedia);
247	}
248	#endif
249	return (ENXIO);
250	}
251
252	/*
253	* If no change, we're done.
254	* XXX Automedia may invole software intervention.
255	* Keep going in case the the connected media changed.
256	* Similarly, if best match changed (kernel debugger?).
257	*/
258	if ((IFM_SUBTYPE(newmedia) != IFM_AUTO) &&
259	(newmedia == ifm->ifm_media) &&
260	(match == ifm->ifm_cur))
261	return 0;
262
263	/*
264	* We found a match, now make the driver switch to it.
265	* Make sure to preserve our old media type in case the
266	* driver can't switch.
267	*/
268	#ifdef IFMEDIA_DEBUG
269	if (ifmedia_debug) {
270	printf("ifmedia_ioctl: switching %s to ",
271	ifp->if_xname);
272	ifmedia_printword(match->ifm_media);
273	}
274	#endif
275	oldentry = ifm->ifm_cur;
276	oldmedia = ifm->ifm_media;
277	ifm->ifm_cur = match;
278	ifm->ifm_media = newmedia;
279	error = (*ifm->ifm_change)(ifp);
280	if (error) {
281	ifm->ifm_cur = oldentry;
282	ifm->ifm_media = oldmedia;
283	}
284	break;
285	}
286
287	/*
288	* Get list of available media and current media on interface.
289	*/
290	case SIOCGIFMEDIA:
291	{
292	struct ifmedia_entry *ep;
293	int *kptr, count;
9bccf70c	294	int usermax; /* user requested max */
1c79356b A	295
	296	kptr = NULL; /* XXX gcc */
	297
	298	ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
	299	ifm->ifm_cur->ifm_media : IFM_NONE;
	300	ifmr->ifm_mask = ifm->ifm_mask;
	301	ifmr->ifm_status = 0;
	302	(*ifm->ifm_status)(ifp, ifmr);
	303
	304	count = 0;
9bccf70c A	305	usermax = 0;
	306
	307	/*
	308	* If there are more interfaces on the list, count
	309	* them. This allows the caller to set ifmr->ifm_count
	310	* to 0 on the first call to know how much space to
	311	* allocate.
	312	*/
	313	LIST_FOREACH(ep, &ifm->ifm_list, ifm_list)
	314	usermax++;
	315
	316	/*
	317	* Don't allow the user to ask for too many
	318	* or a negative number.
	319	*/
	320	if (ifmr->ifm_count > usermax)
	321	ifmr->ifm_count = usermax;
	322	else if (ifmr->ifm_count < 0)
	323	return (EINVAL);
1c79356b A	324
	325	if (ifmr->ifm_count != 0) {
	326	kptr = (int ) _MALLOC(ifmr->ifm_count sizeof(int),
	327	M_TEMP, M_WAITOK);
	328
	329	/*
	330	* Get the media words from the interface's list.
	331	*/
9bccf70c	332	ep = LIST_FIRST(&ifm->ifm_list);
1c79356b	333	for (; ep != NULL && count < ifmr->ifm_count;
9bccf70c	334	ep = LIST_NEXT(ep, ifm_list), count++)
1c79356b A	335	kptr[count] = ep->ifm_media;
	336
	337	if (ep != NULL)
	338	error = E2BIG; /* oops! */
9bccf70c A	339	} else {
9bccf70c A	340	count = usermax;
1c79356b A	341	}
1c79356b A	342
1c79356b A	343	/*
	344	* We do the copyout on E2BIG, because that's
	345	* just our way of telling userland that there
	346	* are more. This is the behavior I've observed
	347	* under BSD/OS 3.0
	348	*/
	349	sticky = error;
	350	if ((error == 0 \|\| error == E2BIG) && ifmr->ifm_count != 0) {
	351	error = copyout((caddr_t)kptr,
	352	(caddr_t)ifmr->ifm_ulist,
	353	ifmr->ifm_count * sizeof(int));
	354	}
	355
	356	if (error == 0)
	357	error = sticky;
	358
	359	if (ifmr->ifm_count != 0)
	360	FREE(kptr, M_TEMP);
	361
	362	ifmr->ifm_count = count;
	363	break;
	364	}
	365
	366	default:
	367	return (EINVAL);
	368	}
	369
	370	return (error);
	371	}
	372
	373	/*
	374	* Find media entry matching a given ifm word.
	375	*
	376	*/
	377	static struct ifmedia_entry *
	378	ifmedia_match(ifm, target, mask)
	379	struct ifmedia *ifm;
	380	int target;
	381	int mask;
	382	{
	383	struct ifmedia_entry match, next;
	384
	385	match = NULL;
	386	mask = ~mask;
	387
9bccf70c	388	LIST_FOREACH(next, &ifm->ifm_list, ifm_list) {
1c79356b A	389	if ((next->ifm_media & mask) == (target & mask)) {
	390	#if defined(IFMEDIA_DEBUG) \|\| defined(DIAGNOSTIC)
	391	if (match) {
	392	printf("ifmedia_match: multiple match for "
	393	"0x%x/0x%x\n", target, mask);
	394	}
	395	#endif
	396	match = next;
	397	}
	398	}
	399
	400	return match;
	401	}
	402
	403	#ifdef IFMEDIA_DEBUG
	404	struct ifmedia_description ifm_type_descriptions[] =
	405	IFM_TYPE_DESCRIPTIONS;
	406
	407	struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
	408	IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
	409
	410	struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
	411	IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
	412
	413	struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
	414	IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
	415
	416	struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
	417	IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
	418
	419	struct ifmedia_description ifm_subtype_fddi_descriptions[] =
	420	IFM_SUBTYPE_FDDI_DESCRIPTIONS;
	421
	422	struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
	423	IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
	424
	425	struct ifmedia_description ifm_subtype_80211_descriptions[] =
	426	IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
	427
	428	struct ifmedia_description ifm_subtype_80211_option_descriptions[] =
	429	IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
	430
	431	struct ifmedia_description ifm_subtype_shared_descriptions[] =
	432	IFM_SUBTYPE_SHARED_DESCRIPTIONS;
	433
	434	struct ifmedia_description ifm_shared_option_descriptions[] =
	435	IFM_SHARED_OPTION_DESCRIPTIONS;
	436
	437	struct ifmedia_type_to_subtype {
	438	struct ifmedia_description *subtypes;
	439	struct ifmedia_description *options;
	440	};
	441
	442	/* must be in the same order as IFM_TYPE_DESCRIPTIONS */
	443	struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
	444	{
	445	&ifm_subtype_ethernet_descriptions[0],
	446	&ifm_subtype_ethernet_option_descriptions[0]
	447	},
	448	{
	449	&ifm_subtype_tokenring_descriptions[0],
	450	&ifm_subtype_tokenring_option_descriptions[0]
	451	},
	452	{
453	&ifm_subtype_fddi_descriptions[0],
454	&ifm_subtype_fddi_option_descriptions[0]
455	},
456	{
457	&ifm_subtype_80211_descriptions[0],
458	&ifm_subtype_80211_option_descriptions[0]
459	},
460	};
461
462	/*
463	* print a media word.
464	*/
465	static void
466	ifmedia_printword(ifmw)
467	int ifmw;
468	{
469	struct ifmedia_description *desc;
470	struct ifmedia_type_to_subtype *ttos;
471	int seen_option = 0;
472
473	/* Find the top-level interface type. */
474	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
475	desc->ifmt_string != NULL; desc++, ttos++)
476	if (IFM_TYPE(ifmw) == desc->ifmt_word)
477	break;
478	if (desc->ifmt_string == NULL) {
479	printf("<unknown type>\n");
480	return;
481	}
482	printf(desc->ifmt_string);
483
484	/*
485	* Check for the shared subtype descriptions first, then the
486	* type-specific ones.
487	*/
488	for (desc = ifm_subtype_shared_descriptions;
489	desc->ifmt_string != NULL; desc++)
490	if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
491	goto got_subtype;
492
493	for (desc = ttos->subtypes; desc->ifmt_string != NULL; desc++)
494	if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
495	break;
496	if (desc->ifmt_string == NULL) {
497	printf(" <unknown subtype>\n");
498	return;
499	}
500
501	got_subtype:
502	printf(" %s", desc->ifmt_string);
503
504	/*
505	* Look for shared options.
506	*/
507	for (desc = ifm_shared_option_descriptions;
508	desc->ifmt_string != NULL; desc++) {
509	if (ifmw & desc->ifmt_word) {
510	if (seen_option == 0)
511	printf(" <");
512	printf("%s%s", seen_option++ ? "," : "",
513	desc->ifmt_string);
514	}
515	}
516
517	/*
518	* Look for subtype-specific options.
519	*/
520	for (desc = ttos->options; desc->ifmt_string != NULL; desc++) {
521	if (ifmw & desc->ifmt_word) {
522	if (seen_option == 0)
523	printf(" <");
524	printf("%s%s", seen_option++ ? "," : "",
525	desc->ifmt_string);
526	}
527	}
528	printf("%s\n", seen_option ? ">" : "");
529	}
530	#endif /* IFMEDIA_DEBUG */