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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_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(struct ifmedia *ifm,
    int flags, int mask);

#ifdef IFMEDIA_DEBUG
int	ifmedia_debug = 0;
static	void ifmedia_printword(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(
	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,
			    CAST_USER_ADDR_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	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
1c79356b A	28	/* $NetBSD: if_media.c,v 1.1 1997/03/17 02:55:15 thorpej Exp $ */
9bccf70c	29	/* $FreeBSD: src/sys/net/if_media.c,v 1.9.2.4 2001/07/04 00:12:38 brooks Exp $ */
1c79356b A	30
	31	/*
	32	* Copyright (c) 1997
	33	* Jonathan Stone and Jason R. Thorpe. All rights reserved.
	34	*
	35	* This software is derived from information provided by Matt Thomas.
	36	*
	37	* Redistribution and use in source and binary forms, with or without
	38	* modification, are permitted provided that the following conditions
	39	* are met:
	40	* 1. Redistributions of source code must retain the above copyright
	41	* notice, this list of conditions and the following disclaimer.
	42	* 2. Redistributions in binary form must reproduce the above copyright
	43	* notice, this list of conditions and the following disclaimer in the
	44	* documentation and/or other materials provided with the distribution.
	45	* 3. All advertising materials mentioning features or use of this software
	46	* must display the following acknowledgement:
	47	* This product includes software developed by Jonathan Stone
	48	* and Jason R. Thorpe for the NetBSD Project.
	49	* 4. The names of the authors may not be used to endorse or promote products
	50	* derived from this software without specific prior written permission.
	51	*
	52	* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
	53	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	54	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	55	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	56	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	57	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	58	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	59	* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	60	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	61	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	62	* SUCH DAMAGE.
	63	*/
	64
	65	/*
	66	* BSD/OS-compatible network interface media selection.
	67	*
	68	* Where it is safe to do so, this code strays slightly from the BSD/OS
	69	* design. Software which uses the API (device drivers, basically)
	70	* shouldn't notice any difference.
	71	*
	72	* Many thanks to Matt Thomas for providing the information necessary
	73	* to implement this interface.
	74	*/
	75
	76	#include <sys/param.h>
	77	#include <sys/systm.h>
	78	#include <sys/socket.h>
	79	#include <sys/sockio.h>
	80	#include <sys/malloc.h>
	81
	82	#include <net/if.h>
	83	#include <net/if_media.h>
	84
	85	/*
	86	* Compile-time options:
	87	* IFMEDIA_DEBUG:
	88	* turn on implementation-level debug printfs.
	89	* Useful for debugging newly-ported drivers.
	90	*/
	91
91447636 A	92	static struct ifmedia_entry ifmedia_match(struct ifmedia ifm,
91447636 A	93	int flags, int mask);
1c79356b A	94
	95	#ifdef IFMEDIA_DEBUG
	96	int ifmedia_debug = 0;
91447636	97	static void ifmedia_printword(int);
1c79356b A	98	#endif
	99
	100	/*
	101	* Initialize if_media struct for a specific interface instance.
	102	*/
	103	void
	104	ifmedia_init(ifm, dontcare_mask, change_callback, status_callback)
	105	struct ifmedia *ifm;
	106	int dontcare_mask;
	107	ifm_change_cb_t change_callback;
	108	ifm_stat_cb_t status_callback;
	109	{
	110
	111	LIST_INIT(&ifm->ifm_list);
	112	ifm->ifm_cur = NULL;
	113	ifm->ifm_media = 0;
	114	ifm->ifm_mask = dontcare_mask; /* IF don't-care bits */
	115	ifm->ifm_change = change_callback;
	116	ifm->ifm_status = status_callback;
	117	}
	118
9bccf70c A	119	void
	120	ifmedia_removeall(ifm)
	121	struct ifmedia *ifm;
	122	{
	123	struct ifmedia_entry *entry;
	124
	125	for (entry = LIST_FIRST(&ifm->ifm_list); entry;
	126	entry = LIST_FIRST(&ifm->ifm_list)) {
	127	LIST_REMOVE(entry, ifm_list);
	128	FREE(entry, M_IFADDR);
	129	}
	130	}
	131
1c79356b A	132	/*
	133	* Add a media configuration to the list of supported media
	134	* for a specific interface instance.
	135	*/
	136	void
	137	ifmedia_add(ifm, mword, data, aux)
	138	struct ifmedia *ifm;
	139	int mword;
	140	int data;
	141	void *aux;
	142	{
	143	register struct ifmedia_entry *entry;
	144
	145	#ifdef IFMEDIA_DEBUG
	146	if (ifmedia_debug) {
	147	if (ifm == NULL) {
	148	printf("ifmedia_add: null ifm\n");
	149	return;
	150	}
	151	printf("Adding entry for ");
	152	ifmedia_printword(mword);
	153	}
	154	#endif
	155
9bccf70c	156	entry = _MALLOC(sizeof(*entry), M_IFADDR, M_NOWAIT);
1c79356b A	157	if (entry == NULL)
	158	panic("ifmedia_add: can't malloc entry");
	159
	160	entry->ifm_media = mword;
	161	entry->ifm_data = data;
	162	entry->ifm_aux = aux;
	163
	164	LIST_INSERT_HEAD(&ifm->ifm_list, entry, ifm_list);
	165	}
	166
	167	/*
	168	* Add an array of media configurations to the list of
	169	* supported media for a specific interface instance.
	170	*/
	171	void
	172	ifmedia_list_add(ifm, lp, count)
	173	struct ifmedia *ifm;
	174	struct ifmedia_entry *lp;
	175	int count;
	176	{
	177	int i;
	178
	179	for (i = 0; i < count; i++)
	180	ifmedia_add(ifm, lp[i].ifm_media, lp[i].ifm_data,
	181	lp[i].ifm_aux);
	182	}
	183
	184	/*
	185	* Set the default active media.
	186	*
	187	* Called by device-specific code which is assumed to have already
	188	* selected the default media in hardware. We do _not_ call the
	189	* media-change callback.
	190	*/
	191	void
	192	ifmedia_set(ifm, target)
	193	struct ifmedia *ifm;
	194	int target;
	195
	196	{
	197	struct ifmedia_entry *match;
	198
	199	match = ifmedia_match(ifm, target, ifm->ifm_mask);
	200
	201	if (match == NULL) {
	202	printf("ifmedia_set: no match for 0x%x/0x%x\n",
	203	target, ~ifm->ifm_mask);
	204	panic("ifmedia_set");
	205	}
	206	ifm->ifm_cur = match;
	207
	208	#ifdef IFMEDIA_DEBUG
	209	if (ifmedia_debug) {
	210	printf("ifmedia_set: target ");
	211	ifmedia_printword(target);
	212	printf("ifmedia_set: setting to ");
	213	ifmedia_printword(ifm->ifm_cur->ifm_media);
	214	}
	215	#endif
	216	}
	217
	218	/*
	219	* Device-independent media ioctl support function.
	220	*/
221	int
91447636 A	222	ifmedia_ioctl(
	223	struct ifnet *ifp,
	224	struct ifreq *ifr,
	225	struct ifmedia *ifm,
	226	u_long cmd)
1c79356b A	227	{
	228	struct ifmedia_entry *match;
	229	struct ifmediareq ifmr = (struct ifmediareq ) ifr;
	230	int error = 0, sticky;
	231
	232	if (ifp == NULL \|\| ifr == NULL \|\| ifm == NULL)
	233	return(EINVAL);
	234
	235	switch (cmd) {
	236
	237	/*
	238	* Set the current media.
	239	*/
	240	case SIOCSIFMEDIA:
	241	{
	242	struct ifmedia_entry *oldentry;
	243	int oldmedia;
	244	int newmedia = ifr->ifr_media;
	245
	246	match = ifmedia_match(ifm, newmedia, ifm->ifm_mask);
	247	if (match == NULL) {
	248	#ifdef IFMEDIA_DEBUG
	249	if (ifmedia_debug) {
	250	printf(
	251	"ifmedia_ioctl: no media found for 0x%x\n",
	252	newmedia);
	253	}
	254	#endif
	255	return (ENXIO);
	256	}
	257
	258	/*
	259	* If no change, we're done.
	260	* XXX Automedia may invole software intervention.
	261	* Keep going in case the the connected media changed.
	262	* Similarly, if best match changed (kernel debugger?).
	263	*/
	264	if ((IFM_SUBTYPE(newmedia) != IFM_AUTO) &&
	265	(newmedia == ifm->ifm_media) &&
	266	(match == ifm->ifm_cur))
	267	return 0;
	268
	269	/*
	270	* We found a match, now make the driver switch to it.
	271	* Make sure to preserve our old media type in case the
	272	* driver can't switch.
	273	*/
	274	#ifdef IFMEDIA_DEBUG
	275	if (ifmedia_debug) {
	276	printf("ifmedia_ioctl: switching %s to ",
	277	ifp->if_xname);
	278	ifmedia_printword(match->ifm_media);
	279	}
	280	#endif
	281	oldentry = ifm->ifm_cur;
	282	oldmedia = ifm->ifm_media;
	283	ifm->ifm_cur = match;
	284	ifm->ifm_media = newmedia;
	285	error = (*ifm->ifm_change)(ifp);
	286	if (error) {
	287	ifm->ifm_cur = oldentry;
	288	ifm->ifm_media = oldmedia;
	289	}
	290	break;
291	}
292
293	/*
294	* Get list of available media and current media on interface.
295	*/
296	case SIOCGIFMEDIA:
297	{
298	struct ifmedia_entry *ep;
299	int *kptr, count;
9bccf70c	300	int usermax; /* user requested max */
1c79356b A	301
	302	kptr = NULL; /* XXX gcc */
	303
	304	ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
	305	ifm->ifm_cur->ifm_media : IFM_NONE;
	306	ifmr->ifm_mask = ifm->ifm_mask;
	307	ifmr->ifm_status = 0;
	308	(*ifm->ifm_status)(ifp, ifmr);
	309
	310	count = 0;
9bccf70c A	311	usermax = 0;
	312
	313	/*
	314	* If there are more interfaces on the list, count
	315	* them. This allows the caller to set ifmr->ifm_count
	316	* to 0 on the first call to know how much space to
	317	* allocate.
	318	*/
	319	LIST_FOREACH(ep, &ifm->ifm_list, ifm_list)
	320	usermax++;
	321
	322	/*
	323	* Don't allow the user to ask for too many
	324	* or a negative number.
	325	*/
	326	if (ifmr->ifm_count > usermax)
	327	ifmr->ifm_count = usermax;
	328	else if (ifmr->ifm_count < 0)
	329	return (EINVAL);
1c79356b A	330
	331	if (ifmr->ifm_count != 0) {
	332	kptr = (int ) _MALLOC(ifmr->ifm_count sizeof(int),
	333	M_TEMP, M_WAITOK);
	334
	335	/*
	336	* Get the media words from the interface's list.
	337	*/
9bccf70c	338	ep = LIST_FIRST(&ifm->ifm_list);
1c79356b	339	for (; ep != NULL && count < ifmr->ifm_count;
9bccf70c	340	ep = LIST_NEXT(ep, ifm_list), count++)
1c79356b A	341	kptr[count] = ep->ifm_media;
	342
	343	if (ep != NULL)
	344	error = E2BIG; /* oops! */
9bccf70c A	345	} else {
9bccf70c A	346	count = usermax;
1c79356b A	347	}
1c79356b A	348
1c79356b A	349	/*
	350	* We do the copyout on E2BIG, because that's
	351	* just our way of telling userland that there
	352	* are more. This is the behavior I've observed
	353	* under BSD/OS 3.0
	354	*/
	355	sticky = error;
	356	if ((error == 0 \|\| error == E2BIG) && ifmr->ifm_count != 0) {
	357	error = copyout((caddr_t)kptr,
91447636	358	CAST_USER_ADDR_T(ifmr->ifm_ulist),
1c79356b A	359	ifmr->ifm_count * sizeof(int));
	360	}
	361
	362	if (error == 0)
	363	error = sticky;
	364
	365	if (ifmr->ifm_count != 0)
	366	FREE(kptr, M_TEMP);
	367
	368	ifmr->ifm_count = count;
	369	break;
	370	}
	371
	372	default:
	373	return (EINVAL);
	374	}
	375
	376	return (error);
	377	}
	378
	379	/*
	380	* Find media entry matching a given ifm word.
	381	*
	382	*/
	383	static struct ifmedia_entry *
	384	ifmedia_match(ifm, target, mask)
	385	struct ifmedia *ifm;
	386	int target;
	387	int mask;
	388	{
	389	struct ifmedia_entry match, next;
	390
	391	match = NULL;
	392	mask = ~mask;
	393
9bccf70c	394	LIST_FOREACH(next, &ifm->ifm_list, ifm_list) {
1c79356b A	395	if ((next->ifm_media & mask) == (target & mask)) {
	396	#if defined(IFMEDIA_DEBUG) \|\| defined(DIAGNOSTIC)
	397	if (match) {
	398	printf("ifmedia_match: multiple match for "
	399	"0x%x/0x%x\n", target, mask);
	400	}
	401	#endif
	402	match = next;
	403	}
	404	}
	405
	406	return match;
	407	}
	408
	409	#ifdef IFMEDIA_DEBUG
	410	struct ifmedia_description ifm_type_descriptions[] =
	411	IFM_TYPE_DESCRIPTIONS;
	412
	413	struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
	414	IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
	415
	416	struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
	417	IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
	418
	419	struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
	420	IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
	421
	422	struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
	423	IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
	424
	425	struct ifmedia_description ifm_subtype_fddi_descriptions[] =
	426	IFM_SUBTYPE_FDDI_DESCRIPTIONS;
	427
	428	struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
	429	IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
	430
	431	struct ifmedia_description ifm_subtype_80211_descriptions[] =
	432	IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
	433
	434	struct ifmedia_description ifm_subtype_80211_option_descriptions[] =
	435	IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
	436
	437	struct ifmedia_description ifm_subtype_shared_descriptions[] =
	438	IFM_SUBTYPE_SHARED_DESCRIPTIONS;
	439
	440	struct ifmedia_description ifm_shared_option_descriptions[] =
	441	IFM_SHARED_OPTION_DESCRIPTIONS;
	442
	443	struct ifmedia_type_to_subtype {
	444	struct ifmedia_description *subtypes;
	445	struct ifmedia_description *options;
	446	};
	447
	448	/* must be in the same order as IFM_TYPE_DESCRIPTIONS */
	449	struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
	450	{
	451	&ifm_subtype_ethernet_descriptions[0],
	452	&ifm_subtype_ethernet_option_descriptions[0]
	453	},
	454	{
	455	&ifm_subtype_tokenring_descriptions[0],
	456	&ifm_subtype_tokenring_option_descriptions[0]
	457	},
	458	{
459	&ifm_subtype_fddi_descriptions[0],
460	&ifm_subtype_fddi_option_descriptions[0]
461	},
462	{
463	&ifm_subtype_80211_descriptions[0],
464	&ifm_subtype_80211_option_descriptions[0]
465	},
466	};
467
468	/*
469	* print a media word.
470	*/
471	static void
472	ifmedia_printword(ifmw)
473	int ifmw;
474	{
475	struct ifmedia_description *desc;
476	struct ifmedia_type_to_subtype *ttos;
477	int seen_option = 0;
478
479	/* Find the top-level interface type. */
480	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
481	desc->ifmt_string != NULL; desc++, ttos++)
482	if (IFM_TYPE(ifmw) == desc->ifmt_word)
483	break;
484	if (desc->ifmt_string == NULL) {
485	printf("<unknown type>\n");
486	return;
487	}
488	printf(desc->ifmt_string);
489
490	/*
491	* Check for the shared subtype descriptions first, then the
492	* type-specific ones.
493	*/
494	for (desc = ifm_subtype_shared_descriptions;
495	desc->ifmt_string != NULL; desc++)
496	if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
497	goto got_subtype;
498
499	for (desc = ttos->subtypes; desc->ifmt_string != NULL; desc++)
500	if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
501	break;
502	if (desc->ifmt_string == NULL) {
503	printf(" <unknown subtype>\n");
504	return;
505	}
506
507	got_subtype:
508	printf(" %s", desc->ifmt_string);
509
510	/*
511	* Look for shared options.
512	*/
513	for (desc = ifm_shared_option_descriptions;
514	desc->ifmt_string != NULL; desc++) {
515	if (ifmw & desc->ifmt_word) {
516	if (seen_option == 0)
517	printf(" <");
518	printf("%s%s", seen_option++ ? "," : "",
519	desc->ifmt_string);
520	}
521	}
522
523	/*
524	* Look for subtype-specific options.
525	*/
526	for (desc = ttos->options; desc->ifmt_string != NULL; desc++) {
527	if (ifmw & desc->ifmt_word) {
528	if (seen_option == 0)
529	printf(" <");
530	printf("%s%s", seen_option++ ? "," : "",
531	desc->ifmt_string);
532	}
533	}
534	printf("%s\n", seen_option ? ">" : "");
535	}
536	#endif /* IFMEDIA_DEBUG */