usr.sbin/bluetooth/bthidd/session.c

   1 /*
   2  * session.c
   3  */
   4
   5 /*-
   6  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   7  *
   8  * Copyright (c) 2006 Maksim Yevmenkin <m_evmenkin@yahoo.com>
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $Id: session.c,v 1.3 2006/09/07 21:06:53 max Exp $
  33  * $FreeBSD$
  34  */
  35
  36 #include <sys/queue.h>
  37 #include <assert.h>
  38 #define L2CAP_SOCKET_CHECKED
  39 #include <bluetooth.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <syslog.h>
  46 #include <unistd.h>
  47 #include <usbhid.h>
  48 #include "bthid_config.h"
  49 #include "bthidd.h"
  50 #include "btuinput.h"
  51 #include "kbd.h"
  52
  53 /*
  54  * Create new session
  55  */
  56
  57 bthid_session_p
  58 session_open(bthid_server_p srv, hid_device_p const d)
  59 {
  60         bthid_session_p s;
  61
  62         assert(srv != NULL);
  63         assert(d != NULL);
  64
  65         if ((s = (bthid_session_p) malloc(sizeof(*s))) == NULL)
  66                 return (NULL);
  67
  68         s->srv = srv;
  69         memcpy(&s->bdaddr, &d->bdaddr, sizeof(s->bdaddr));
  70         s->ctrl = -1;
  71         s->intr = -1;
  72         s->vkbd = -1;
  73         s->ctx = NULL;
  74         s->state = CLOSED;
  75         s->ukbd = -1;
  76         s->umouse = -1;
  77         s->obutt = 0;
  78
  79         s->keys1 = bit_alloc(kbd_maxkey());
  80         if (s->keys1 == NULL) {
  81                 free(s);
  82                 return (NULL);
  83         }
  84
  85         s->keys2 = bit_alloc(kbd_maxkey());
  86         if (s->keys2 == NULL) {
  87                 free(s->keys1);
  88                 free(s);
  89                 return (NULL);
  90         }
  91
  92         LIST_INSERT_HEAD(&srv->sessions, s, next);
  93
  94         return (s);
  95 }
  96
  97 /*
  98  * Initialize virtual keyboard and mouse after both channels are established
  99  */
 100
 101 int32_t
 102 session_run(bthid_session_p s)
 103 {
 104         hid_device_p d = get_hid_device(&s->bdaddr);
 105         struct sockaddr_l2cap   local;
 106         socklen_t               len;
 107
 108         if (d->keyboard) {
 109                 /* Open /dev/vkbdctl */
 110                 s->vkbd = open("/dev/vkbdctl", O_RDWR);
 111                 if (s->vkbd < 0) {
 112                         syslog(LOG_ERR, "Could not open /dev/vkbdctl " \
 113                                 "for %s. %s (%d)", bt_ntoa(&s->bdaddr, NULL),
 114                                 strerror(errno), errno);
 115                         return (-1);
 116                 }
 117                 /* Register session's vkbd descriptor (if needed) for read */
 118                 FD_SET(s->vkbd, &s->srv->rfdset);
 119                 if (s->vkbd > s->srv->maxfd)
 120                         s->srv->maxfd = s->vkbd;
 121         }
 122
 123         /* Pass device for probing */
 124         hid_initialise(s);
 125
 126         /* Take local bdaddr */
 127         len = sizeof(local);
 128         getsockname(s->ctrl, (struct sockaddr *) &local, &len);
 129
 130         if (d->mouse && s->srv->uinput) {
 131                 s->umouse = uinput_open_mouse(d, &local.l2cap_bdaddr);
 132                 if (s->umouse < 0) {
 133                         syslog(LOG_ERR, "Could not open /dev/uinput " \
 134                                 "for %s. %s (%d)", bt_ntoa(&s->bdaddr,
 135                                 NULL), strerror(errno), errno);
 136                         return (-1);
 137                 }
 138         }
 139         if (d->keyboard && s->srv->uinput) {
 140                 s->ukbd = uinput_open_keyboard(d, &local.l2cap_bdaddr);
 141                 if (s->ukbd < 0) {
 142                         syslog(LOG_ERR, "Could not open /dev/uinput " \
 143                                 "for %s. %s (%d)", bt_ntoa(&s->bdaddr,
 144                                 NULL), strerror(errno), errno);
 145                         return (-1);
 146                 }
 147                 /* Register session's ukbd descriptor (if needed) for read */
 148                 FD_SET(s->ukbd, &s->srv->rfdset);
 149                 if (s->ukbd > s->srv->maxfd)
 150                         s->srv->maxfd = s->ukbd;
 151         }
 152         return (0);
 153 }
 154
 155 /*
 156  * Lookup session by bdaddr
 157  */
 158
 159 bthid_session_p
 160 session_by_bdaddr(bthid_server_p srv, bdaddr_p bdaddr)
 161 {
 162         bthid_session_p s;
 163
 164         assert(srv != NULL);
 165         assert(bdaddr != NULL);
 166
 167         LIST_FOREACH(s, &srv->sessions, next)
 168                 if (memcmp(&s->bdaddr, bdaddr, sizeof(s->bdaddr)) == 0)
 169                         break;
 170
 171         return (s);
 172 }
 173
 174 /*
 175  * Lookup session by fd
 176  */
 177
 178 bthid_session_p
 179 session_by_fd(bthid_server_p srv, int32_t fd)
 180 {
 181         bthid_session_p s;
 182
 183         assert(srv != NULL);
 184         assert(fd >= 0);
 185
 186         LIST_FOREACH(s, &srv->sessions, next)
 187                 if (s->ctrl == fd || s->intr == fd ||
 188                     s->vkbd == fd || s->ukbd == fd)
 189                         break;
 190
 191         return (s);
 192 }
 193
 194 /*
 195  * Close session
 196  */
 197
 198 void
 199 session_close(bthid_session_p s)
 200 {
 201         assert(s != NULL);
 202         assert(s->srv != NULL);
 203
 204         LIST_REMOVE(s, next);
 205
 206         if (s->intr != -1) {
 207                 FD_CLR(s->intr, &s->srv->rfdset);
 208                 FD_CLR(s->intr, &s->srv->wfdset);
 209                 close(s->intr);
 210
 211                 if (s->srv->maxfd == s->intr)
 212                         s->srv->maxfd --;
 213         }
 214
 215         if (s->ctrl != -1) {
 216                 FD_CLR(s->ctrl, &s->srv->rfdset);
 217                 FD_CLR(s->ctrl, &s->srv->wfdset);
 218                 close(s->ctrl);
 219
 220                 if (s->srv->maxfd == s->ctrl)
 221                         s->srv->maxfd --;
 222         }
 223
 224         if (s->vkbd != -1) {
 225                 FD_CLR(s->vkbd, &s->srv->rfdset);
 226                 close(s->vkbd);
 227
 228                 if (s->srv->maxfd == s->vkbd)
 229                         s->srv->maxfd --;
 230         }
 231
 232         if (s->umouse != -1)
 233                 close(s->umouse);
 234
 235         if (s->ukbd != -1) {
 236                 FD_CLR(s->ukbd, &s->srv->rfdset);
 237                 close(s->ukbd);
 238
 239                 if (s->srv->maxfd == s->ukbd)
 240                         s->srv->maxfd --;
 241         }
 242
 243         free(s->ctx);
 244         free(s->keys1);
 245         free(s->keys2);
 246
 247         memset(s, 0, sizeof(*s));
 248         free(s);
 249 }
 250