src/rfkill.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2013  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 #define _GNU_SOURCE
  27 #include <stdio.h>
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <string.h>
  32 #include <stdint.h>
  33
  34 #include "connman.h"
  35
  36 enum rfkill_type {
  37         RFKILL_TYPE_ALL = 0,
  38         RFKILL_TYPE_WLAN,
  39         RFKILL_TYPE_BLUETOOTH,
  40         RFKILL_TYPE_UWB,
  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_WWAN:
  70                 return CONNMAN_SERVICE_TYPE_CELLULAR;
  71         }
  72
  73         return CONNMAN_SERVICE_TYPE_UNKNOWN;
  74 }
  75
  76 static enum rfkill_type convert_service_type(enum connman_service_type type)
  77 {
  78         switch (type) {
  79         case CONNMAN_SERVICE_TYPE_WIFI:
  80                 return RFKILL_TYPE_WLAN;
  81         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
  82                 return RFKILL_TYPE_BLUETOOTH;
  83         case CONNMAN_SERVICE_TYPE_CELLULAR:
  84                 return RFKILL_TYPE_WWAN;
  85         case CONNMAN_SERVICE_TYPE_GPS:
  86                 return RFKILL_TYPE_GPS;
  87         case CONNMAN_SERVICE_TYPE_SYSTEM:
  88         case CONNMAN_SERVICE_TYPE_ETHERNET:
  89         case CONNMAN_SERVICE_TYPE_VPN:
  90         case CONNMAN_SERVICE_TYPE_GADGET:
  91         case CONNMAN_SERVICE_TYPE_P2P:
  92         case CONNMAN_SERVICE_TYPE_UNKNOWN:
  93                 return NUM_RFKILL_TYPES;
  94         }
  95
  96         return NUM_RFKILL_TYPES;
  97 }
  98
  99 static GIOStatus rfkill_process(GIOChannel *chan)
 100 {
 101         unsigned char buf[32];
 102         struct rfkill_event *event = (void *) buf;
 103         enum connman_service_type type;
 104         gsize len;
 105         GIOStatus status;
 106
 107         DBG("");
 108
 109         memset(buf, 0, sizeof(buf));
 110
 111         status = g_io_channel_read_chars(chan, (gchar *) buf,
 112                         sizeof(struct rfkill_event), &len, NULL);
 113
 114         if (status != G_IO_STATUS_NORMAL)
 115                 return status;
 116
 117         if (len != sizeof(struct rfkill_event))
 118                 return status;
 119
 120         DBG("idx %u type %u op %u soft %u hard %u", event->idx,
 121                                                 event->type, event->op,
 122                                                 event->soft, event->hard);
 123
 124         type = convert_type(event->type);
 125
 126         switch (event->op) {
 127         case RFKILL_OP_ADD:
 128                 __connman_technology_add_rfkill(event->idx, type,
 129                                                 event->soft, event->hard);
 130                 break;
 131         case RFKILL_OP_DEL:
 132                 __connman_technology_remove_rfkill(event->idx, type);
 133                 break;
 134         case RFKILL_OP_CHANGE:
 135                 __connman_technology_update_rfkill(event->idx, type,
 136                                                 event->soft, event->hard);
 137                 break;
 138         default:
 139                 break;
 140         }
 141
 142         return status;
 143 }
 144
 145 static gboolean rfkill_event(GIOChannel *chan, GIOCondition cond, gpointer data)
 146 {
 147         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
 148                 return FALSE;
 149
 150         if (rfkill_process(chan) == G_IO_STATUS_ERROR)
 151                 return FALSE;
 152
 153         return TRUE;
 154 }
 155
 156 static guint watch = 0;
 157
 158 int __connman_rfkill_block(enum connman_service_type type, bool block)
 159 {
 160         uint8_t rfkill_type;
 161         struct rfkill_event event;
 162         ssize_t len;
 163         int fd, err = 0;
 164
 165         DBG("type %d block %d", type, block);
 166
 167         rfkill_type = convert_service_type(type);
 168         if (rfkill_type == NUM_RFKILL_TYPES)
 169                 return -EINVAL;
 170
 171         fd = open("/dev/rfkill", O_RDWR | O_CLOEXEC);
 172         if (fd < 0)
 173                 return -errno;
 174
 175         memset(&event, 0, sizeof(event));
 176         event.op = RFKILL_OP_CHANGE_ALL;
 177         event.type = rfkill_type;
 178         event.soft = block;
 179
 180         len = write(fd, &event, sizeof(event));
 181         if (len < 0) {
 182                 err = -errno;
 183                 connman_error("Failed to change RFKILL state");
 184         }
 185
 186         close(fd);
 187
 188         return err;
 189 }
 190
 191 int __connman_rfkill_init(void)
 192 {
 193         GIOChannel *channel;
 194         GIOFlags flags;
 195         int fd;
 196
 197         DBG("");
 198
 199         fd = open("/dev/rfkill", O_RDWR | O_CLOEXEC);
 200         if (fd < 0) {
 201                 connman_error("Failed to open RFKILL control device");
 202                 return -EIO;
 203         }
 204
 205         channel = g_io_channel_unix_new(fd);
 206         g_io_channel_set_close_on_unref(channel, TRUE);
 207
 208         g_io_channel_set_encoding(channel, NULL, NULL);
 209         g_io_channel_set_buffered(channel, FALSE);
 210
 211         flags = g_io_channel_get_flags(channel);
 212         flags |= G_IO_FLAG_NONBLOCK;
 213         g_io_channel_set_flags(channel, flags, NULL);
 214
 215         /* Process current RFKILL events sent on device open */
 216         while (rfkill_process(channel) == G_IO_STATUS_NORMAL);
 217
 218         watch = g_io_add_watch(channel,
 219                                 G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
 220                                 rfkill_event, NULL);
 221
 222         g_io_channel_unref(channel);
 223
 224         return watch ? 0 : -EIO;
 225 }
 226
 227 void __connman_rfkill_cleanup(void)
 228 {
 229         DBG("");
 230
 231         if (watch) {
 232                 g_source_remove(watch);
 233                 watch = 0;
 234         }
 235 }