[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 $	*/

/*
 * 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;
}

/*
 * 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;

		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;
		ep = ifm->ifm_list.lh_first;

		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.
			 */
			for (; ep != NULL && count < ifmr->ifm_count;
			    ep = ep->ifm_list.le_next, count++)
				kptr[count] = ep->ifm_media;

			if (ep != NULL)
				error = E2BIG;	/* oops! */
		}

		/*
		 * 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
		 * callocate.
		 */
		for (; ep != NULL; ep = ep->ifm_list.le_next)
			count++;

		/*
		 * 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;

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