src/rfkill.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <stdint.h>
  32
  33 #include "connman.h"
  34
  35 enum rfkill_type {
  36         RFKILL_TYPE_ALL = 0,
  37         RFKILL_TYPE_WLAN,
  38         RFKILL_TYPE_BLUETOOTH,
  39         RFKILL_TYPE_UWB,
  40         RFKILL_TYPE_WIMAX,
  41         RFKILL_TYPE_WWAN,
  42         RFKILL_TYPE_GPS,
  43         RFKILL_TYPE_FM,
  44         NUM_RFKILL_TYPES,
  45 };
  46
  47 enum rfkill_operation {
  48         RFKILL_OP_ADD = 0,
  49         RFKILL_OP_DEL,
  50         RFKILL_OP_CHANGE,
  51         RFKILL_OP_CHANGE_ALL,
  52 };
  53
  54 struct rfkill_event {
  55         uint32_t idx;
  56         uint8_t  type;
  57         uint8_t  op;
  58         uint8_t  soft;
  59         uint8_t  hard;
  60 };
  61
  62 static enum connman_service_type convert_type(uint8_t type)
  63 {
  64         switch (type) {
  65         case RFKILL_TYPE_WLAN:
  66                 return CONNMAN_SERVICE_TYPE_WIFI;
  67         case RFKILL_TYPE_BLUETOOTH:
  68                 return CONNMAN_SERVICE_TYPE_BLUETOOTH;
  69         case RFKILL_TYPE_WIMAX:
  70                 return CONNMAN_SERVICE_TYPE_WIMAX;
  71         case RFKILL_TYPE_WWAN:
  72                 return CONNMAN_SERVICE_TYPE_CELLULAR;
  73         }
  74
  75         return CONNMAN_SERVICE_TYPE_UNKNOWN;
  76 }
  77
  78 static enum rfkill_type convert_service_type(enum connman_service_type type)
  79 {
  80         switch (type) {
  81         case CONNMAN_SERVICE_TYPE_WIFI:
  82                 return RFKILL_TYPE_WLAN;
  83         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
  84                 return RFKILL_TYPE_BLUETOOTH;
  85         case CONNMAN_SERVICE_TYPE_WIMAX:
  86                 return RFKILL_TYPE_WIMAX;
  87         case CONNMAN_SERVICE_TYPE_CELLULAR:
  88                 return RFKILL_TYPE_WWAN;
  89         case CONNMAN_SERVICE_TYPE_GPS:
  90                 return RFKILL_TYPE_GPS;
  91         case CONNMAN_SERVICE_TYPE_SYSTEM:
  92         case CONNMAN_SERVICE_TYPE_ETHERNET:
  93         case CONNMAN_SERVICE_TYPE_VPN:
  94         case CONNMAN_SERVICE_TYPE_GADGET:
  95         case CONNMAN_SERVICE_TYPE_UNKNOWN:
  96                 return NUM_RFKILL_TYPES;
  97         }
  98
  99         return NUM_RFKILL_TYPES;
 100 }
 101
 102 static GIOStatus rfkill_process(GIOChannel *chan)
 103 {
 104         unsigned char buf[32];
 105         struct rfkill_event *event = (void *) buf;
 106         enum connman_service_type type;
 107         gsize len;
 108         GIOStatus status;
 109
 110         DBG("");
 111
 112         memset(buf, 0, sizeof(buf));
 113
 114         status = g_io_channel_read_chars(chan, (gchar *) buf,
 115                         sizeof(struct rfkill_event), &len, NULL);
 116
 117         if (status != G_IO_STATUS_NORMAL)
 118                 return status;
 119
 120         if (len != sizeof(struct rfkill_event))
 121                 return status;
 122
 123         DBG("idx %u type %u op %u soft %u hard %u", event->idx,
 124                                                 event->type, event->op,
 125                                                 event->soft, event->hard);
 126
 127         type = convert_type(event->type);
 128
 129         switch (event->op) {
 130         case RFKILL_OP_ADD:
 131                 __connman_technology_add_rfkill(event->idx, type,
 132                                                 event->soft, event->hard);
 133                 break;
 134         case RFKILL_OP_DEL:
 135                 __connman_technology_remove_rfkill(event->idx, type);
 136                 break;
 137         case RFKILL_OP_CHANGE:
 138                 __connman_technology_update_rfkill(event->idx, type,
 139                                                 event->soft, event->hard);
 140                 break;
 141         default:
 142                 break;
 143         }
 144
 145         return status;
 146 }
 147
 148 static gboolean rfkill_event(GIOChannel *chan,
 149                                 GIOCondition cond, gpointer data)
 150 {
 151         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
 152                 return FALSE;
 153
 154         if (rfkill_process(chan) == G_IO_STATUS_ERROR)
 155                 return FALSE;
 156
 157         return TRUE;
 158 }
 159
 160 static GIOChannel *channel = NULL;
 161
 162 int __connman_rfkill_block(enum connman_service_type type, connman_bool_t block)
 163 {
 164         uint8_t rfkill_type;
 165         struct rfkill_event event;
 166         ssize_t len;
 167         int fd;
 168
 169         DBG("type %d block %d", type, block);
 170
 171         rfkill_type = convert_service_type(type);
 172         if (rfkill_type == NUM_RFKILL_TYPES)
 173                 return -EINVAL;
 174
 175         fd = open("/dev/rfkill", O_RDWR | O_CLOEXEC);
 176         if (fd < 0)
 177                 return fd;
 178
 179         memset(&event, 0, sizeof(event));
 180         event.op = RFKILL_OP_CHANGE_ALL;
 181         event.type = rfkill_type;
 182         event.soft = block;
 183
 184         len = write(fd, &event, sizeof(event));
 185         if (len < 0)
 186                 connman_error("Failed to change RFKILL state");
 187
 188         close(fd);
 189
 190         return 0;
 191 }
 192
 193 int __connman_rfkill_init(void)
 194 {
 195         GIOFlags flags;
 196         int fd;
 197
 198         DBG("");
 199
 200         fd = open("/dev/rfkill", O_RDWR | O_CLOEXEC);
 201         if (fd < 0) {
 202                 connman_error("Failed to open RFKILL control device");
 203                 return -EIO;
 204         }
 205
 206         channel = g_io_channel_unix_new(fd);
 207         g_io_channel_set_close_on_unref(channel, TRUE);
 208
 209         g_io_channel_set_encoding(channel, NULL, NULL);
 210         g_io_channel_set_buffered(channel, FALSE);
 211
 212         flags = g_io_channel_get_flags(channel);
 213         flags |= G_IO_FLAG_NONBLOCK;
 214         g_io_channel_set_flags(channel, flags, NULL);
 215
 216         /* Process current RFKILL events sent on device open */
 217         while (rfkill_process(channel) == G_IO_STATUS_NORMAL);
 218
 219         g_io_add_watch(channel, G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
 220                                                         rfkill_event, NULL);
 221
 222         return 0;
 223 }
 224
 225 void __connman_rfkill_cleanup(void)
 226 {
 227         DBG("");
 228
 229         if (channel == NULL)
 230                 return;
 231
 232         g_io_channel_shutdown(channel, TRUE, NULL);
 233         g_io_channel_unref(channel);
 234
 235         channel = NULL;
 236 }