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freebsd-dev/usr.sbin/bluetooth/bthidd/kbd.c
Maksim Yevmenkin 52a4455b80 fix incorrect usage of hid_set_data() which causes crash 
in bthidd(8) on amd64 WITH_SSP builds

Submitted by:	rakuco
Reviewed by:	rakuco
Tested by:	rakuco
MFC after:	1 week
2016-03-23 22:07:13 +00:00

578 lines
20 KiB
C
Raw Blame History

/*
* kbd.c
*/
/*-
* Copyright (c) 2006 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $Id: kbd.c,v 1.4 2006/09/07 21:06:53 max Exp $
* $FreeBSD$
*/
#include <sys/consio.h>
#include <sys/ioctl.h>
#include <sys/kbio.h>
#include <sys/queue.h>
#include <sys/wait.h>
#include <assert.h>
#define L2CAP_SOCKET_CHECKED
#include <bluetooth.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <dev/vkbd/vkbd_var.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <usbhid.h>
#include "bthid_config.h"
#include "bthidd.h"
#include "kbd.h"
static void kbd_write(bitstr_t *m, int32_t fb, int32_t make, int32_t fd);
static int32_t kbd_xlate(int32_t code, int32_t make, int32_t *b, int32_t const *eob);
/*
* HID code to PS/2 set 1 code translation table.
*
* http://www.microsoft.com/whdc/device/input/Scancode.mspx
*
* The table only contains "make" (key pressed) codes.
* The "break" (key released) code is generated as "make" | 0x80
*/
#define E0PREFIX (1U << 31)
#define NOBREAK (1 << 30)
#define CODEMASK (~(E0PREFIX|NOBREAK))
static int32_t const x[] =
{
/*==================================================*/
/* Name HID code Make Break*/
/*==================================================*/
/* No Event 00 */ -1, /* None */
/* Overrun Error 01 */ NOBREAK|0xFF, /* None */
/* POST Fail 02 */ NOBREAK|0xFC, /* None */
/* ErrorUndefined 03 */ -1, /* Unassigned */
/* a A 04 */ 0x1E, /* 9E */
/* b B 05 */ 0x30, /* B0 */
/* c C 06 */ 0x2E, /* AE */
/* d D 07 */ 0x20, /* A0 */
/* e E 08 */ 0x12, /* 92 */
/* f F 09 */ 0x21, /* A1 */
/* g G 0A */ 0x22, /* A2 */
/* h H 0B */ 0x23, /* A3 */
/* i I 0C */ 0x17, /* 97 */
/* j J 0D */ 0x24, /* A4 */
/* k K 0E */ 0x25, /* A5 */
/* l L 0F */ 0x26, /* A6 */
/* m M 10 */ 0x32, /* B2 */
/* n N 11 */ 0x31, /* B1 */
/* o O 12 */ 0x18, /* 98 */
/* p P 13 */ 0x19, /* 99 */
/* q Q 14 */ 0x10, /* 90 */
/* r R 15 */ 0x13, /* 93 */
/* s S 16 */ 0x1F, /* 9F */
/* t T 17 */ 0x14, /* 94 */
/* u U 18 */ 0x16, /* 96 */
/* v V 19 */ 0x2F, /* AF */
/* w W 1A */ 0x11, /* 91 */
/* x X 1B */ 0x2D, /* AD */
/* y Y 1C */ 0x15, /* 95 */
/* z Z 1D */ 0x2C, /* AC */
/* 1 ! 1E */ 0x02, /* 82 */
/* 2 @ 1F */ 0x03, /* 83 */
/* 3 # 20 */ 0x04, /* 84 */
/* 4 $ 21 */ 0x05, /* 85 */
/* 5 % 22 */ 0x06, /* 86 */
/* 6 ^ 23 */ 0x07, /* 87 */
/* 7 & 24 */ 0x08, /* 88 */
/* 8 * 25 */ 0x09, /* 89 */
/* 9 ( 26 */ 0x0A, /* 8A */
/* 0 ) 27 */ 0x0B, /* 8B */
/* Return 28 */ 0x1C, /* 9C */
/* Escape 29 */ 0x01, /* 81 */
/* Backspace 2A */ 0x0E, /* 8E */
/* Tab 2B */ 0x0F, /* 8F */
/* Space 2C */ 0x39, /* B9 */
/* - _ 2D */ 0x0C, /* 8C */
/* = + 2E */ 0x0D, /* 8D */
/* [ { 2F */ 0x1A, /* 9A */
/* ] } 30 */ 0x1B, /* 9B */
/* \ | 31 */ 0x2B, /* AB */
/* Europe 1 32 */ 0x2B, /* AB */
/* ; : 33 */ 0x27, /* A7 */
/* " ' 34 */ 0x28, /* A8 */
/* ` ~ 35 */ 0x29, /* A9 */
/* comma < 36 */ 0x33, /* B3 */
/* . > 37 */ 0x34, /* B4 */
/* / ? 38 */ 0x35, /* B5 */
/* Caps Lock 39 */ 0x3A, /* BA */
/* F1 3A */ 0x3B, /* BB */
/* F2 3B */ 0x3C, /* BC */
/* F3 3C */ 0x3D, /* BD */
/* F4 3D */ 0x3E, /* BE */
/* F5 3E */ 0x3F, /* BF */
/* F6 3F */ 0x40, /* C0 */
/* F7 40 */ 0x41, /* C1 */
/* F8 41 */ 0x42, /* C2 */
/* F9 42 */ 0x43, /* C3 */
/* F10 43 */ 0x44, /* C4 */
/* F11 44 */ 0x57, /* D7 */
/* F12 45 */ 0x58, /* D8 */
/* Print Screen 46 */ E0PREFIX|0x37, /* E0 B7 */
/* Scroll Lock 47 */ 0x46, /* C6 */
#if 0
/* Break (Ctrl-Pause) 48 */ E0 46 E0 C6, /* None */
/* Pause 48 */ E1 1D 45 E1 9D C5, /* None */
#else
/* Break (Ctrl-Pause)/Pause 48 */ NOBREAK /* Special case */, /* None */
#endif
/* Insert 49 */ E0PREFIX|0x52, /* E0 D2 */
/* Home 4A */ E0PREFIX|0x47, /* E0 C7 */
/* Page Up 4B */ E0PREFIX|0x49, /* E0 C9 */
/* Delete 4C */ E0PREFIX|0x53, /* E0 D3 */
/* End 4D */ E0PREFIX|0x4F, /* E0 CF */
/* Page Down 4E */ E0PREFIX|0x51, /* E0 D1 */
/* Right Arrow 4F */ E0PREFIX|0x4D, /* E0 CD */
/* Left Arrow 50 */ E0PREFIX|0x4B, /* E0 CB */
/* Down Arrow 51 */ E0PREFIX|0x50, /* E0 D0 */
/* Up Arrow 52 */ E0PREFIX|0x48, /* E0 C8 */
/* Num Lock 53 */ 0x45, /* C5 */
/* Keypad / 54 */ E0PREFIX|0x35, /* E0 B5 */
/* Keypad * 55 */ 0x37, /* B7 */
/* Keypad - 56 */ 0x4A, /* CA */
/* Keypad + 57 */ 0x4E, /* CE */
/* Keypad Enter 58 */ E0PREFIX|0x1C, /* E0 9C */
/* Keypad 1 End 59 */ 0x4F, /* CF */
/* Keypad 2 Down 5A */ 0x50, /* D0 */
/* Keypad 3 PageDn 5B */ 0x51, /* D1 */
/* Keypad 4 Left 5C */ 0x4B, /* CB */
/* Keypad 5 5D */ 0x4C, /* CC */
/* Keypad 6 Right 5E */ 0x4D, /* CD */
/* Keypad 7 Home 5F */ 0x47, /* C7 */
/* Keypad 8 Up 60 */ 0x48, /* C8 */
/* Keypad 9 PageUp 61 */ 0x49, /* C9 */
/* Keypad 0 Insert 62 */ 0x52, /* D2 */
/* Keypad . Delete 63 */ 0x53, /* D3 */
/* Europe 2 64 */ 0x56, /* D6 */
/* App 65 */ E0PREFIX|0x5D, /* E0 DD */
/* Keyboard Power 66 */ E0PREFIX|0x5E, /* E0 DE */
/* Keypad = 67 */ 0x59, /* D9 */
/* F13 68 */ 0x64, /* E4 */
/* F14 69 */ 0x65, /* E5 */
/* F15 6A */ 0x66, /* E6 */
/* F16 6B */ 0x67, /* E7 */
/* F17 6C */ 0x68, /* E8 */
/* F18 6D */ 0x69, /* E9 */
/* F19 6E */ 0x6A, /* EA */
/* F20 6F */ 0x6B, /* EB */
/* F21 70 */ 0x6C, /* EC */
/* F22 71 */ 0x6D, /* ED */
/* F23 72 */ 0x6E, /* EE */
/* F24 73 */ 0x76, /* F6 */
/* Keyboard Execute 74 */ -1, /* Unassigned */
/* Keyboard Help 75 */ -1, /* Unassigned */
/* Keyboard Menu 76 */ -1, /* Unassigned */
/* Keyboard Select 77 */ -1, /* Unassigned */
/* Keyboard Stop 78 */ -1, /* Unassigned */
/* Keyboard Again 79 */ -1, /* Unassigned */
/* Keyboard Undo 7A */ -1, /* Unassigned */
/* Keyboard Cut 7B */ -1, /* Unassigned */
/* Keyboard Copy 7C */ -1, /* Unassigned */
/* Keyboard Paste 7D */ -1, /* Unassigned */
/* Keyboard Find 7E */ -1, /* Unassigned */
/* Keyboard Mute 7F */ -1, /* Unassigned */
/* Keyboard Volume Up 80 */ -1, /* Unassigned */
/* Keyboard Volume Dn 81 */ -1, /* Unassigned */
/* Keyboard Locking Caps Lock 82 */ -1, /* Unassigned */
/* Keyboard Locking Num Lock 83 */ -1, /* Unassigned */
/* Keyboard Locking Scroll Lock 84 */ -1, /* Unassigned */
/* Keypad comma 85 */ 0x7E, /* FE */
/* Keyboard Equal Sign 86 */ -1, /* Unassigned */
/* Keyboard Int'l 1 87 */ 0x73, /* F3 */
/* Keyboard Int'l 2 88 */ 0x70, /* F0 */
/* Keyboard Int'l 2 89 */ 0x7D, /* FD */
/* Keyboard Int'l 4 8A */ 0x79, /* F9 */
/* Keyboard Int'l 5 8B */ 0x7B, /* FB */
/* Keyboard Int'l 6 8C */ 0x5C, /* DC */
/* Keyboard Int'l 7 8D */ -1, /* Unassigned */
/* Keyboard Int'l 8 8E */ -1, /* Unassigned */
/* Keyboard Int'l 9 8F */ -1, /* Unassigned */
/* Keyboard Lang 1 90 */ 0x71, /* Kana */
/* Keyboard Lang 2 91 */ 0x72, /* Eisu */
/* Keyboard Lang 3 92 */ 0x78, /* F8 */
/* Keyboard Lang 4 93 */ 0x77, /* F7 */
/* Keyboard Lang 5 94 */ 0x76, /* F6 */
/* Keyboard Lang 6 95 */ -1, /* Unassigned */
/* Keyboard Lang 7 96 */ -1, /* Unassigned */
/* Keyboard Lang 8 97 */ -1, /* Unassigned */
/* Keyboard Lang 9 98 */ -1, /* Unassigned */
/* Keyboard Alternate Erase 99 */ -1, /* Unassigned */
/* Keyboard SysReq/Attention 9A */ -1, /* Unassigned */
/* Keyboard Cancel 9B */ -1, /* Unassigned */
/* Keyboard Clear 9C */ -1, /* Unassigned */
/* Keyboard Prior 9D */ -1, /* Unassigned */
/* Keyboard Return 9E */ -1, /* Unassigned */
/* Keyboard Separator 9F */ -1, /* Unassigned */
/* Keyboard Out A0 */ -1, /* Unassigned */
/* Keyboard Oper A1 */ -1, /* Unassigned */
/* Keyboard Clear/Again A2 */ -1, /* Unassigned */
/* Keyboard CrSel/Props A3 */ -1, /* Unassigned */
/* Keyboard ExSel A4 */ -1, /* Unassigned */
/* Reserved A5 */ -1, /* Reserved */
/* Reserved A6 */ -1, /* Reserved */
/* Reserved A7 */ -1, /* Reserved */
/* Reserved A8 */ -1, /* Reserved */
/* Reserved A9 */ -1, /* Reserved */
/* Reserved AA */ -1, /* Reserved */
/* Reserved AB */ -1, /* Reserved */
/* Reserved AC */ -1, /* Reserved */
/* Reserved AD */ -1, /* Reserved */
/* Reserved AE */ -1, /* Reserved */
/* Reserved AF */ -1, /* Reserved */
/* Reserved B0 */ -1, /* Reserved */
/* Reserved B1 */ -1, /* Reserved */
/* Reserved B2 */ -1, /* Reserved */
/* Reserved B3 */ -1, /* Reserved */
/* Reserved B4 */ -1, /* Reserved */
/* Reserved B5 */ -1, /* Reserved */
/* Reserved B6 */ -1, /* Reserved */
/* Reserved B7 */ -1, /* Reserved */
/* Reserved B8 */ -1, /* Reserved */
/* Reserved B9 */ -1, /* Reserved */
/* Reserved BA */ -1, /* Reserved */
/* Reserved BB */ -1, /* Reserved */
/* Reserved BC */ -1, /* Reserved */
/* Reserved BD */ -1, /* Reserved */
/* Reserved BE */ -1, /* Reserved */
/* Reserved BF */ -1, /* Reserved */
/* Reserved C0 */ -1, /* Reserved */
/* Reserved C1 */ -1, /* Reserved */
/* Reserved C2 */ -1, /* Reserved */
/* Reserved C3 */ -1, /* Reserved */
/* Reserved C4 */ -1, /* Reserved */
/* Reserved C5 */ -1, /* Reserved */
/* Reserved C6 */ -1, /* Reserved */
/* Reserved C7 */ -1, /* Reserved */
/* Reserved C8 */ -1, /* Reserved */
/* Reserved C9 */ -1, /* Reserved */
/* Reserved CA */ -1, /* Reserved */
/* Reserved CB */ -1, /* Reserved */
/* Reserved CC */ -1, /* Reserved */
/* Reserved CD */ -1, /* Reserved */
/* Reserved CE */ -1, /* Reserved */
/* Reserved CF */ -1, /* Reserved */
/* Reserved D0 */ -1, /* Reserved */
/* Reserved D1 */ -1, /* Reserved */
/* Reserved D2 */ -1, /* Reserved */
/* Reserved D3 */ -1, /* Reserved */
/* Reserved D4 */ -1, /* Reserved */
/* Reserved D5 */ -1, /* Reserved */
/* Reserved D6 */ -1, /* Reserved */
/* Reserved D7 */ -1, /* Reserved */
/* Reserved D8 */ -1, /* Reserved */
/* Reserved D9 */ -1, /* Reserved */
/* Reserved DA */ -1, /* Reserved */
/* Reserved DB */ -1, /* Reserved */
/* Reserved DC */ -1, /* Reserved */
/* Reserved DD */ -1, /* Reserved */
/* Reserved DE */ -1, /* Reserved */
/* Reserved DF */ -1, /* Reserved */
/* Left Control E0 */ 0x1D, /* 9D */
/* Left Shift E1 */ 0x2A, /* AA */
/* Left Alt E2 */ 0x38, /* B8 */
/* Left GUI E3 */ E0PREFIX|0x5B, /* E0 DB */
/* Right Control E4 */ E0PREFIX|0x1D, /* E0 9D */
/* Right Shift E5 */ 0x36, /* B6 */
/* Right Alt E6 */ E0PREFIX|0x38, /* E0 B8 */
/* Right GUI E7 */ E0PREFIX|0x5C /* E0 DC */
};
#define xsize ((int32_t)(sizeof(x)/sizeof(x[0])))
/*
* Get a max HID keycode (aligned)
*/
int32_t
kbd_maxkey(void)
{
return (xsize);
}
/*
* Process keys
*/
int32_t
kbd_process_keys(bthid_session_p s)
{
bitstr_t diff[bitstr_size(xsize)];
int32_t f1, f2, i;
assert(s != NULL);
assert(s->srv != NULL);
/* Check if the new keys have been pressed */
bit_ffs(s->keys1, xsize, &f1);
/* Check if old keys still pressed */
bit_ffs(s->keys2, xsize, &f2);
if (f1 == -1) {
/* no new key pressed */
if (f2 != -1) {
/* release old keys */
kbd_write(s->keys2, f2, 0, s->vkbd);
memset(s->keys2, 0, bitstr_size(xsize));
}
return (0);
}
if (f2 == -1) {
/* no old keys, but new keys pressed */
assert(f1 != -1);
memcpy(s->keys2, s->keys1, bitstr_size(xsize));
kbd_write(s->keys1, f1, 1, s->vkbd);
memset(s->keys1, 0, bitstr_size(xsize));
return (0);
}
/* new keys got pressed, old keys got released */
memset(diff, 0, bitstr_size(xsize));
for (i = f2; i < xsize; i ++) {
if (bit_test(s->keys2, i)) {
if (!bit_test(s->keys1, i)) {
bit_clear(s->keys2, i);
bit_set(diff, i);
}
}
}
for (i = f1; i < xsize; i++) {
if (bit_test(s->keys1, i)) {
if (!bit_test(s->keys2, i))
bit_set(s->keys2, i);
else
bit_clear(s->keys1, i);
}
}
bit_ffs(diff, xsize, &f2);
if (f2 > 0)
kbd_write(diff, f2, 0, s->vkbd);
bit_ffs(s->keys1, xsize, &f1);
if (f1 > 0) {
kbd_write(s->keys1, f1, 1, s->vkbd);
memset(s->keys1, 0, bitstr_size(xsize));
}
return (0);
}
/*
* Translate given keymap and write keyscodes
*/
static void
kbd_write(bitstr_t *m, int32_t fb, int32_t make, int32_t fd)
{
int32_t i, *b, *eob, n, buf[64];
b = buf;
eob = b + sizeof(buf)/sizeof(buf[0]);
i = fb;
while (i < xsize) {
if (bit_test(m, i)) {
n = kbd_xlate(i, make, b, eob);
if (n == -1) {
write(fd, buf, (b - buf) * sizeof(buf[0]));
b = buf;
continue;
}
b += n;
}
i ++;
}
if (b != buf)
write(fd, buf, (b - buf) * sizeof(buf[0]));
}
/*
* Translate HID code into PS/2 code and put codes into buffer b.
* Returns the number of codes put in b. Return -1 if buffer has not
* enough space.
*/
#undef PUT
#define PUT(c, n, b, eob) \
do { \
if ((b) >= (eob)) \
return (-1); \
*(b) = (c); \
(b) ++; \
(n) ++; \
} while (0)
static int32_t
kbd_xlate(int32_t code, int32_t make, int32_t *b, int32_t const *eob)
{
int32_t c, n;
n = 0;
if (code >= xsize)
return (0); /* HID code is not in the table */
/* Handle special case - Pause/Break */
if (code == 0x48) {
if (!make)
return (0); /* No break code */
#if 0
XXX FIXME
if (ctrl_is_pressed) {
/* Break (Ctrl-Pause) */
PUT(0xe0, n, b, eob);
PUT(0x46, n, b, eob);
PUT(0xe0, n, b, eob);
PUT(0xc6, n, b, eob);
} else {
/* Pause */
PUT(0xe1, n, b, eob);
PUT(0x1d, n, b, eob);
PUT(0x45, n, b, eob);
PUT(0xe1, n, b, eob);
PUT(0x9d, n, b, eob);
PUT(0xc5, n, b, eob);
}
#endif
return (n);
}
if ((c = x[code]) == -1)
return (0); /* HID code translation is not defined */
if (make) {
if (c & E0PREFIX)
PUT(0xe0, n, b, eob);
PUT((c & CODEMASK), n, b, eob);
} else if (!(c & NOBREAK)) {
if (c & E0PREFIX)
PUT(0xe0, n, b, eob);
PUT((0x80|(c & CODEMASK)), n, b, eob);
}
return (n);
}
/*
* Process status change from vkbd(4)
*/
int32_t
kbd_status_changed(bthid_session_p s, uint8_t *data, int32_t len)
{
vkbd_status_t st;
uint8_t found, report_id;
hid_device_p hid_device;
hid_data_t d;
hid_item_t h;
assert(s != NULL);
assert(len == sizeof(vkbd_status_t));
memcpy(&st, data, sizeof(st));
found = 0;
report_id = NO_REPORT_ID;
hid_device = get_hid_device(&s->bdaddr);
assert(hid_device != NULL);
data[0] = 0xa2; /* DATA output (HID output report) */
data[1] = 0x00;
data[2] = 0x00;
for (d = hid_start_parse(hid_device->desc, 1 << hid_output, -1);
hid_get_item(d, &h) > 0; ) {
if (HID_PAGE(h.usage) == HUP_LEDS) {
found++;
if (report_id == NO_REPORT_ID)
report_id = h.report_ID;
else if (h.report_ID != report_id)
syslog(LOG_WARNING, "Output HID report IDs " \
"for %s do not match: %d vs. %d. " \
"Please report",
bt_ntoa(&s->bdaddr, NULL),
h.report_ID, report_id);
switch(HID_USAGE(h.usage)) {
case 0x01: /* Num Lock LED */
if (st.leds & LED_NUM)
hid_set_data(&data[1], &h, 1);
break;
case 0x02: /* Caps Lock LED */
if (st.leds & LED_CAP)
hid_set_data(&data[1], &h, 1);
break;
case 0x03: /* Scroll Lock LED */
if (st.leds & LED_SCR)
hid_set_data(&data[1], &h, 1);
break;
/* XXX add other LEDs ? */
}
}
}
hid_end_parse(d);
if (found)
write(s->intr, data, (report_id != NO_REPORT_ID) ? 3 : 2);
return (0);
}
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