1/*
2 * Copyright (c) 2015 Etienne Gemsa <etienne.gemsa@lse.epita.fr>
3 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "defs.h"
30
31#include <linux/ioctl.h>
32
33#ifdef HAVE_LINUX_INPUT_H
34#include <linux/input.h>
35#include "xlat/evdev_abs.h"
36#include "xlat/evdev_autorepeat.h"
37#include "xlat/evdev_ff_status.h"
38#include "xlat/evdev_ff_types.h"
39#include "xlat/evdev_keycode.h"
40#include "xlat/evdev_leds.h"
41#include "xlat/evdev_misc.h"
42#include "xlat/evdev_mtslots.h"
43#include "xlat/evdev_prop.h"
44#include "xlat/evdev_relative_axes.h"
45#include "xlat/evdev_snd.h"
46#include "xlat/evdev_switch.h"
47#include "xlat/evdev_sync.h"
48
49#ifndef SYN_MAX
50# define SYN_MAX 0xf
51#endif
52
53static void
54decode_envelope(struct ff_envelope *envelope)
55{
56	tprintf(", envelope={attack_length=%" PRIu16 ", attack_level=%" PRIu16
57		", fade_length=%" PRIu16 ", fade_level=%" PRIx32 "}",
58		envelope->attack_length,
59		envelope->attack_level,
60		envelope->fade_length,
61		envelope->fade_level);
62}
63
64static int
65ff_effect_ioctl(struct tcb *tcp, long arg)
66{
67	struct ff_effect ffe;
68
69	if (!verbose(tcp) || umove(tcp, arg, &ffe) < 0)
70		return 0;
71
72	tprints(", {type=");
73	printxval(evdev_ff_types, ffe.type, "FF_???");
74	tprintf(", id=%" PRIu16 ", direction=%" PRIu16,
75		ffe.id, ffe.direction);
76
77	if (!abbrev(tcp)) {
78		tprintf(", trigger={button=%" PRIu16 ", interval=%" PRIu16 "}",
79			ffe.trigger.button, ffe.trigger.interval);
80		tprintf(", replay={lenght=%" PRIu16 ", delay=%" PRIu16 "}",
81			ffe.replay.length, ffe.replay.delay);
82		switch (ffe.type) {
83			case FF_CONSTANT:
84				tprintf(", constant_ef={%" PRIi16,
85					ffe.u.constant.level);
86				decode_envelope(&ffe.u.constant.envelope);
87				tprints("}");
88				return 1;
89			case FF_RAMP:
90				tprintf(", ramp={start_level=%" PRIi16
91					", end_level=%" PRIi16,
92					ffe.u.ramp.start_level,
93					ffe.u.ramp.end_level);
94				decode_envelope(&ffe.u.ramp.envelope);
95				tprints("}");
96				return 1;
97			case FF_PERIODIC:
98				tprintf(", periodic_ef={waveform=%" PRIu16
99					", period=%" PRIu16
100					", magnitude=%" PRIi16
101					", offset=%" PRIi16
102					", phase=%" PRIu16,
103					ffe.u.periodic.waveform,
104					ffe.u.periodic.period,
105					ffe.u.periodic.magnitude,
106					ffe.u.periodic.offset,
107					ffe.u.periodic.phase);
108				decode_envelope(&ffe.u.periodic.envelope);
109				tprintf(", custom_len=%" PRIu32
110					", *custom_data=%#lx}",
111					ffe.u.periodic.custom_len,
112					(unsigned long)ffe.u.periodic.custom_data);
113				return 1;
114			case FF_RUMBLE:
115				tprintf(", rumble={strong_magnitude=%" PRIu16
116					", weak_magnitude=%" PRIu16 "}",
117					ffe.u.rumble.strong_magnitude,
118					ffe.u.rumble.weak_magnitude);
119				return 1;
120			case FF_SPRING:
121			case FF_FRICTION:
122			case FF_DAMPER:
123			case FF_INERTIA:
124			case FF_CUSTOM:
125				break;
126			default :
127				break;
128		}
129	}
130
131	tprints(", ...}");
132	return 1;
133}
134
135static int
136abs_ioctl(struct tcb *tcp, long arg)
137{
138	struct input_absinfo absinfo;
139
140	if (!verbose(tcp) || umove(tcp, arg, &absinfo) < 0)
141		return 0;
142
143	tprintf(", {value=%" PRIu32 ", minimum=%" PRIu32,
144		absinfo.value, absinfo.minimum);
145	if (!abbrev(tcp)) {
146		tprintf(", maximum=%" PRIu32 ", fuzz=%" PRIu32,
147			absinfo.maximum, absinfo.fuzz);
148		tprintf(", flat=%" PRIu32, absinfo.flat);
149#ifdef HAVE_STRUCT_INPUT_ABSINFO_RESOLUTION
150		tprintf(", resolution=%" PRIu32, absinfo.resolution);
151#endif
152		tprints("}");
153	} else {
154		tprints(", ...}");
155	}
156	return 1;
157}
158
159static int
160keycode_ioctl(struct tcb *tcp, long arg)
161{
162	unsigned int keycode[2];
163
164	if (!arg) {
165		tprints(", NULL");
166		return 1;
167	}
168
169	if (!verbose(tcp) || umove(tcp, arg, &keycode) < 0)
170		return 0;
171
172	tprintf(", [%u, ", keycode[0]);
173	printxval(evdev_keycode, keycode[1], "KEY_???");
174	tprints("]");
175	return 1;
176}
177
178#ifdef EVIOCGKEYCODE_V2
179static int
180keycode_V2_ioctl(struct tcb *tcp, long arg)
181{
182	struct input_keymap_entry ike;
183
184	if (!arg) {
185		tprints(", NULL");
186		return 1;
187	}
188
189	if (!verbose(tcp) || umove(tcp, arg, &ike) < 0)
190		return 0;
191
192	tprintf(", {flags=%" PRIu8 ", len=%" PRIu8, ike.flags, ike.len);
193	if (!abbrev(tcp)) {
194		unsigned int i;
195
196		tprintf(", index=%" PRIu16 ", keycode=", ike.index);
197		printxval(evdev_keycode, ike.keycode, "KEY_???");
198		tprints(", scancode=[");
199		for (i = 0; i < ARRAY_SIZE(ike.scancode); i++) {
200			if (i > 0)
201				tprints(", ");
202			tprintf("%" PRIx8, ike.scancode[i]);
203		}
204		tprints("]}");
205	} else {
206		tprints(", ...}");
207	}
208	return 1;
209}
210#endif /* EVIOCGKEYCODE_V2 */
211
212static int
213getid_ioctl(struct tcb *tcp, long arg)
214{
215	struct input_id id;
216
217	if (!verbose(tcp) || umove(tcp, arg, &id) < 0)
218		return 0;
219
220	tprintf(", {ID_BUS=%" PRIu16 ", ID_VENDOR=%" PRIu16,
221		id.bustype, id.vendor);
222	if (!abbrev(tcp)) {
223		tprintf(", ID_PRODUCT=%" PRIu16 ", ID_VERSION=%" PRIu16 "}",
224			id.product, id.version);
225	} else {
226		tprints(", ...}");
227	}
228	return 1;
229}
230
231static int
232decode_bitset(struct tcb *tcp, long arg, const struct xlat decode_nr[],
233	      const unsigned int max_nr, const char *dflt)
234{
235	if (!verbose(tcp))
236		return 0;
237
238	unsigned int size;
239	if ((unsigned long) tcp->u_rval > max_nr)
240		size = max_nr;
241	else
242		size = tcp->u_rval;
243	char decoded_arg[size];
244
245	if (umoven(tcp, arg, size, decoded_arg) < 0)
246		return 0;
247
248	tprints(", [");
249
250	int bit_displayed = 0;
251	int i = next_set_bit(decoded_arg, 0, size);
252	if (i < 0) {
253		tprints(" 0 ");
254	} else {
255		printxval(decode_nr, i, dflt);
256
257		while ((i = next_set_bit(decoded_arg, i + 1, size)) > 0) {
258			if (abbrev(tcp) && bit_displayed >= 3) {
259				tprints(", ...");
260				break;
261			}
262			tprints(", ");
263			printxval(decode_nr, i, dflt);
264			bit_displayed++;
265		}
266	}
267
268	tprints("]");
269
270	return 1;
271}
272
273#ifdef EVIOCGMTSLOTS
274static int
275mtslots_ioctl(struct tcb *tcp, const unsigned int code, long arg)
276{
277	const size_t size = _IOC_SIZE(code) / sizeof(int32_t);
278	if (!size)
279		return 0;
280
281	int32_t buffer[size];
282
283	if (!verbose(tcp) || umove(tcp, arg, &buffer) < 0)
284		return 0;
285
286	tprints(", {code=");
287	printxval(evdev_mtslots, buffer[0], "ABS_MT_???");
288
289	unsigned int i;
290	tprints(", values=[");
291
292	for (i = 1; i < ARRAY_SIZE(buffer); i++)
293		tprintf("%s%d", i > 1 ? ", " : "", buffer[i]);
294
295	tprints("]}");
296	return 1;
297}
298#endif /* EVIOCGMTSLOTS */
299
300#ifdef EVIOCGREP
301static int
302repeat_ioctl(struct tcb *tcp, long arg)
303{
304	unsigned int val[2];
305
306	if (!verbose(tcp) || umove(tcp, arg, &val) < 0)
307		return 0;
308
309	tprintf(", [%" PRIu32 " %" PRIu32 "]", val[0], val[1]);
310	return 1;
311}
312#endif /* EVIOCGREP */
313
314static int
315evdev_read_ioctl(struct tcb *tcp, const unsigned int code, long arg)
316{
317	if (entering(tcp))
318		return 1;
319
320	if (syserror(tcp))
321		return 0;
322
323	if ((_IOC_NR(code) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0))) {
324		switch (_IOC_NR(code) - 0x20) {
325			case EV_SYN:
326				return decode_bitset(tcp, arg, evdev_sync,
327						SYN_MAX, "SYN_???");
328			case EV_KEY:
329				return decode_bitset(tcp, arg, evdev_keycode,
330						KEY_MAX, "KEY_???");
331			case EV_REL:
332				return decode_bitset(tcp, arg, evdev_relative_axes,
333						REL_MAX, "REL_???");
334			case EV_ABS:
335				return decode_bitset(tcp, arg,
336						evdev_abs, ABS_MAX, "ABS_???");
337			case EV_MSC:
338				return decode_bitset(tcp, arg,
339						evdev_misc, MSC_MAX, "MSC_???");
340#ifdef EV_SW
341			case EV_SW:
342				return decode_bitset(tcp, arg,
343						evdev_switch, SW_MAX, "SW_???");
344#endif
345			case EV_LED:
346				return decode_bitset(tcp, arg,
347						evdev_leds, LED_MAX, "LED_???");
348			case EV_SND:
349				return decode_bitset(tcp, arg,
350						evdev_snd, SND_MAX, "SND_???");
351			case EV_REP:
352				return decode_bitset(tcp, arg, evdev_autorepeat,
353						REP_MAX, "REP_???");
354			case EV_FF:
355				return decode_bitset(tcp, arg, evdev_ff_types,
356						FF_MAX, "FF_???");
357			case EV_PWR:
358				printnum_int(tcp, arg, "%d");
359				return 1;
360			case EV_FF_STATUS:
361				return decode_bitset(tcp, arg, evdev_ff_status,
362						FF_STATUS_MAX, "FF_STATUS_???");
363			default:
364				return 0;
365		}
366	}
367
368	if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0)))
369		return abs_ioctl(tcp, arg);
370
371	switch (code) {
372		case EVIOCGVERSION:
373			tprints(", ");
374			printnum_int(tcp, arg, "%" PRIx32);
375			return 1;
376		case EVIOCGEFFECTS:
377			tprints(", ");
378			printnum_int(tcp, arg, "%" PRIu32);
379			return 1;
380		case EVIOCGID:
381			return getid_ioctl(tcp, arg);
382#ifdef EVIOCGREP
383		case EVIOCGREP:
384			return repeat_ioctl(tcp, arg);;
385#endif
386		case EVIOCGKEYCODE:
387			return keycode_ioctl(tcp, arg);
388#ifdef EVIOCGKEYCODE_V2
389		case EVIOCGKEYCODE_V2:
390			return keycode_V2_ioctl(tcp, arg);
391#endif
392	}
393
394	switch (_IOC_NR(code)) {
395#ifdef EVIOCGMTSLOTS
396		case _IOC_NR(EVIOCGMTSLOTS(0)):
397			return mtslots_ioctl(tcp, code, arg);
398#endif
399		case _IOC_NR(EVIOCGNAME(0)):
400		case _IOC_NR(EVIOCGPHYS(0)):
401		case _IOC_NR(EVIOCGUNIQ(0)):
402			tprints(", ");
403			printstr(tcp, arg, tcp->u_rval - 1);
404			return 1;
405#ifdef EVIOCGPROP
406		case _IOC_NR(EVIOCGPROP(0)):
407			return decode_bitset(tcp, arg,
408					evdev_prop, INPUT_PROP_MAX, "PROP_???");
409#endif
410		case _IOC_NR(EVIOCGSND(0)):
411			return decode_bitset(tcp, arg,
412					evdev_snd, SND_MAX, "SND_???");
413#ifdef EVIOCGSW
414		case _IOC_NR(EVIOCGSW(0)):
415			return decode_bitset(tcp, arg,
416					evdev_switch, SW_MAX, "SW_???");
417#endif
418		case _IOC_NR(EVIOCGKEY(0)):
419			return decode_bitset(tcp, arg,
420					evdev_keycode, KEY_MAX, "KEY_???");
421		case _IOC_NR(EVIOCGLED(0)):
422			return decode_bitset(tcp, arg,
423					evdev_leds, LED_MAX, "LED_???");
424		default:
425			return 0;
426	}
427}
428
429static int
430evdev_write_ioctl(struct tcb *tcp, const unsigned int code, long arg)
431{
432	if (exiting(tcp))
433		return 1;
434
435	if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0)))
436		return abs_ioctl(tcp, arg);
437
438	switch (code) {
439#ifdef EVIOCSREP
440		case EVIOCSREP:
441			return repeat_ioctl(tcp, arg);
442#endif
443		case EVIOCSKEYCODE:
444			return keycode_ioctl(tcp, arg);
445#ifdef EVIOCSKEYCODE_V2
446		case EVIOCSKEYCODE_V2:
447			return keycode_V2_ioctl(tcp, arg);
448#endif
449		case EVIOCSFF:
450			return ff_effect_ioctl(tcp, arg);
451		case EVIOCRMFF:
452#ifdef EVIOCSCLOCKID
453		case EVIOCSCLOCKID:
454#endif
455		case EVIOCGRAB:
456#ifdef EVIOCREVOKE
457		case EVIOCREVOKE:
458#endif
459			tprints(", ");
460			printnum_int(tcp, arg, "%u");
461			return 1;
462		default:
463			return 0;
464	}
465}
466
467int
468evdev_ioctl(struct tcb *tcp, const unsigned int code, long arg)
469{
470	switch(_IOC_DIR(code)) {
471		case _IOC_READ:
472			return evdev_read_ioctl(tcp, code, arg);
473		case _IOC_WRITE:
474			if (!evdev_write_ioctl(tcp, code, arg))
475				tprintf(", %lx", arg);
476			return 1;
477		default:
478			return 0;
479	}
480}
481
482#endif /* HAVE_LINUX_INPUT_H */
483