1/*
2 * Copyright (c) 1983, 1993
3 *  The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31#include <sys/param.h>
32#include <sys/ioctl.h>
33#include <sys/socket.h>
34#include <sys/sysctl.h>
35#include <sys/time.h>
36
37#include <net/if.h>
38#include <net/if_dl.h>
39#include <net/if_types.h>
40#include <net/if_media.h>
41#include <net/route.h>
42
43#include <assert.h>
44#include <ctype.h>
45#include <err.h>
46#include <errno.h>
47#include <fcntl.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51#include <unistd.h>
52
53#include "libifconfig.h"
54#include "libifconfig_internal.h"
55
56
57static struct ifmedia_description *get_toptype_desc(int);
58static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
59static struct ifmedia_description *get_subtype_desc(int,
60    struct ifmedia_type_to_subtype *ttos);
61
62#define IFM_OPMODE(x)							 \
63	((x) & (IFM_IEEE80211_ADHOC | IFM_IEEE80211_HOSTAP |		 \
64	IFM_IEEE80211_IBSS | IFM_IEEE80211_WDS | IFM_IEEE80211_MONITOR | \
65	IFM_IEEE80211_MBSS))
66#define IFM_IEEE80211_STA    0
67
68static struct ifmedia_description ifm_type_descriptions[] =
69    IFM_TYPE_DESCRIPTIONS;
70
71static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
72    IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
73
74static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
75    IFM_SUBTYPE_ETHERNET_ALIASES;
76
77static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
78    IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
79
80static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
81    IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
82
83static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
84    IFM_SUBTYPE_IEEE80211_ALIASES;
85
86static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
87    IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
88
89static struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
90    IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
91
92static struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
93    IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
94
95static struct ifmedia_description ifm_subtype_atm_descriptions[] =
96    IFM_SUBTYPE_ATM_DESCRIPTIONS;
97
98static struct ifmedia_description ifm_subtype_atm_aliases[] =
99    IFM_SUBTYPE_ATM_ALIASES;
100
101static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
102    IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
103
104static struct ifmedia_description ifm_subtype_shared_descriptions[] =
105    IFM_SUBTYPE_SHARED_DESCRIPTIONS;
106
107static struct ifmedia_description ifm_subtype_shared_aliases[] =
108    IFM_SUBTYPE_SHARED_ALIASES;
109
110static struct ifmedia_description ifm_shared_option_descriptions[] =
111    IFM_SHARED_OPTION_DESCRIPTIONS;
112
113static struct ifmedia_description ifm_shared_option_aliases[] =
114    IFM_SHARED_OPTION_ALIASES;
115
116struct ifmedia_type_to_subtype {
117	struct {
118		struct ifmedia_description *desc;
119		int alias;
120	}
121	subtypes[5];
122	struct {
123		struct ifmedia_description *desc;
124		int alias;
125	}
126	options[4];
127	struct {
128		struct ifmedia_description *desc;
129		int alias;
130	}
131	modes[3];
132};
133
134/* must be in the same order as IFM_TYPE_DESCRIPTIONS */
135static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] =
136{
137	{
138		{
139			{ &ifm_subtype_shared_descriptions[0],		 0 },
140			{ &ifm_subtype_shared_aliases[0],		 1 },
141			{ &ifm_subtype_ethernet_descriptions[0],	 0 },
142			{ &ifm_subtype_ethernet_aliases[0],		 1 },
143			{ NULL,						 0 },
144		},
145		{
146			{ &ifm_shared_option_descriptions[0],		 0 },
147			{ &ifm_shared_option_aliases[0],		 1 },
148			{ &ifm_subtype_ethernet_option_descriptions[0],	 0 },
149			{ NULL,						 0 },
150		},
151		{
152			{ NULL,						 0 },
153		},
154	},
155	{
156		{
157			{ &ifm_subtype_shared_descriptions[0],		 0 },
158			{ &ifm_subtype_shared_aliases[0],		 1 },
159			{ &ifm_subtype_ieee80211_descriptions[0],	 0 },
160			{ &ifm_subtype_ieee80211_aliases[0],		 1 },
161			{ NULL,						 0 },
162		},
163		{
164			{ &ifm_shared_option_descriptions[0],		 0 },
165			{ &ifm_shared_option_aliases[0],		 1 },
166			{ &ifm_subtype_ieee80211_option_descriptions[0], 0 },
167			{ NULL,						 0 },
168		},
169		{
170			{ &ifm_subtype_ieee80211_mode_descriptions[0],	 0 },
171			{ &ifm_subtype_ieee80211_mode_aliases[0],	 0 },
172			{ NULL,						 0 },
173		},
174	},
175	{
176		{
177			{ &ifm_subtype_shared_descriptions[0],		 0 },
178			{ &ifm_subtype_shared_aliases[0],		 1 },
179			{ &ifm_subtype_atm_descriptions[0],		 0 },
180			{ &ifm_subtype_atm_aliases[0],			 1 },
181			{ NULL,						 0 },
182		},
183		{
184			{ &ifm_shared_option_descriptions[0],		 0 },
185			{ &ifm_shared_option_aliases[0],		 1 },
186			{ &ifm_subtype_atm_option_descriptions[0],	 0 },
187			{ NULL,						 0 },
188		},
189		{
190			{ NULL,						 0 },
191		},
192	},
193};
194
195static struct ifmedia_description *
196get_toptype_desc(int ifmw)
197{
198	struct ifmedia_description *desc;
199
200	for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++) {
201		if (IFM_TYPE(ifmw) == desc->ifmt_word) {
202			break;
203		}
204	}
205
206	return (desc);
207}
208
209static struct ifmedia_type_to_subtype *
210get_toptype_ttos(int ifmw)
211{
212	struct ifmedia_description *desc;
213	struct ifmedia_type_to_subtype *ttos;
214
215	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
216	    desc->ifmt_string != NULL; desc++, ttos++) {
217		if (IFM_TYPE(ifmw) == desc->ifmt_word) {
218			break;
219		}
220	}
221
222	return (ttos);
223}
224
225static struct ifmedia_description *
226get_subtype_desc(int ifmw,
227    struct ifmedia_type_to_subtype *ttos)
228{
229	int i;
230	struct ifmedia_description *desc;
231
232	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
233		if (ttos->subtypes[i].alias) {
234			continue;
235		}
236		for (desc = ttos->subtypes[i].desc;
237		    desc->ifmt_string != NULL; desc++) {
238			if (IFM_SUBTYPE(ifmw) == desc->ifmt_word) {
239				return (desc);
240			}
241		}
242	}
243
244	return (NULL);
245}
246
247const char *
248ifconfig_media_get_type(int ifmw)
249{
250	struct ifmedia_description *desc;
251
252	/*int seen_option = 0, i;*/
253
254	/* Find the top-level interface type. */
255	desc = get_toptype_desc(ifmw);
256	if (desc->ifmt_string == NULL) {
257		return ("<unknown type>");
258	} else {
259		return (desc->ifmt_string);
260	}
261}
262
263const char *
264ifconfig_media_get_subtype(int ifmw)
265{
266	struct ifmedia_description *desc;
267	struct ifmedia_type_to_subtype *ttos;
268
269	ttos = get_toptype_ttos(ifmw);
270	desc = get_subtype_desc(ifmw, ttos);
271	return (desc->ifmt_string);
272}
273
274/***************************************************************************
275* Above this point, this file is mostly copied from sbin/ifconfig/ifmedia.c
276***************************************************************************/
277
278/* Internal structure used for allocations and frees */
279struct _ifconfig_media_status {
280	struct ifmediareq ifmr;
281	int medialist[0];
282};
283
284int
285ifconfig_media_get_mediareq(ifconfig_handle_t *h, const char *name,
286    struct ifmediareq **ifmr)
287{
288	struct _ifconfig_media_status *ms, *ms2;
289	unsigned long cmd = SIOCGIFXMEDIA;
290
291	*ifmr = NULL;
292	ms = calloc(1, sizeof(*ms));
293	if (ms == NULL) {
294		h->error.errtype = OTHER;
295		h->error.errcode = ENOMEM;
296		return (-1);
297	}
298	(void)memset(ms, 0, sizeof(*ms));
299	(void)strlcpy(ms->ifmr.ifm_name, name, sizeof(ms->ifmr.ifm_name));
300
301	/*
302	 * Check if interface supports extended media types.
303	 */
304	if (ifconfig_ioctlwrap(h, AF_LOCAL, cmd, &ms->ifmr) < 0) {
305		cmd = SIOCGIFMEDIA;
306		if (ifconfig_ioctlwrap(h, AF_LOCAL, cmd, &ms->ifmr) < 0) {
307			/* Interface doesn't support SIOC{G,S}IFMEDIA.  */
308			h->error.errtype = OK;
309			free(ms);
310			return (-1);
311		}
312	}
313	if (ms->ifmr.ifm_count == 0) {
314		*ifmr = &ms->ifmr;
315		return (0);     /* Interface has no media types ?*/
316	}
317
318	ms2 = realloc(ms, sizeof(*ms) + sizeof(int) * ms->ifmr.ifm_count);
319	if (ms2 == NULL) {
320		h->error.errtype = OTHER;
321		h->error.errcode = ENOMEM;
322		free(ms);
323		return (-1);
324	}
325	ms2->ifmr.ifm_ulist = &ms2->medialist[0];
326
327	if (ifconfig_ioctlwrap(h, AF_LOCAL, cmd, &ms2->ifmr) < 0) {
328		free(ms2);
329		return (-1);
330	}
331
332	*ifmr = &ms2->ifmr;
333	return (0);
334}
335
336const char *
337ifconfig_media_get_status(const struct ifmediareq *ifmr)
338{
339	switch (IFM_TYPE(ifmr->ifm_active)) {
340	case IFM_ETHER:
341	case IFM_ATM:
342		if (ifmr->ifm_status & IFM_ACTIVE) {
343			return ("active");
344		} else {
345			return ("no carrier");
346		}
347		break;
348
349	case IFM_IEEE80211:
350		if (ifmr->ifm_status & IFM_ACTIVE) {
351			/* NB: only sta mode associates */
352			if (IFM_OPMODE(ifmr->ifm_active) == IFM_IEEE80211_STA) {
353				return ("associated");
354			} else {
355				return ("running");
356			}
357		} else {
358			return ("no carrier");
359		}
360		break;
361	default:
362		return ("");
363	}
364}
365
366void
367ifconfig_media_get_options_string(int ifmw, char *buf, size_t buflen)
368{
369	struct ifmedia_type_to_subtype *ttos;
370	struct ifmedia_description *desc;
371	int i, seen_option = 0;
372	size_t len;
373
374	assert(buflen > 0);
375	buf[0] = '\0';
376	ttos = get_toptype_ttos(ifmw);
377	for (i = 0; ttos->options[i].desc != NULL; i++) {
378		if (ttos->options[i].alias) {
379			continue;
380		}
381		for (desc = ttos->options[i].desc;
382		    desc->ifmt_string != NULL; desc++) {
383			if (ifmw & desc->ifmt_word) {
384				if (seen_option++) {
385					strlcat(buf, ",", buflen);
386				}
387				len = strlcat(buf, desc->ifmt_string, buflen);
388				assert(len < buflen);
389				buf += len;
390				buflen -= len;
391			}
392		}
393	}
394}
395