src/detect.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  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 <unistd.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <sys/stat.h>
  32 #include <sys/ioctl.h>
  33 #include <sys/socket.h>
  34 #include <net/ethernet.h>
  35 #include <linux/if_arp.h>
  36 #include <linux/wireless.h>
  37
  38 #include <glib.h>
  39
  40 #include "connman.h"
  41
  42 static GSList *device_list = NULL;
  43
  44 static struct connman_device *find_device(int index)
  45 {
  46         GSList *list;
  47
  48         for (list = device_list; list; list = list->next) {
  49                 struct connman_device *device = list->data;
  50
  51                 if (connman_device_get_index(device) == index)
  52                         return device;
  53         }
  54
  55         return NULL;
  56 }
  57
  58 static char *index2name(int index)
  59 {
  60         struct ifreq ifr;
  61         int sk, err;
  62
  63         if (index < 0)
  64                 return NULL;
  65
  66         sk = socket(PF_INET, SOCK_DGRAM, 0);
  67         if (sk < 0)
  68                 return NULL;
  69
  70         memset(&ifr, 0, sizeof(ifr));
  71         ifr.ifr_ifindex = index;
  72
  73         err = ioctl(sk, SIOCGIFNAME, &ifr);
  74
  75         close(sk);
  76
  77         if (err < 0)
  78                 return NULL;
  79
  80         return strdup(ifr.ifr_name);
  81 }
  82
  83 static char *index2ident(int index, const char *prefix)
  84 {
  85         struct ifreq ifr;
  86         struct ether_addr *eth;
  87         char *str;
  88         int sk, err, len;
  89
  90         if (index < 0)
  91                 return NULL;
  92
  93         sk = socket(PF_INET, SOCK_DGRAM, 0);
  94         if (sk < 0)
  95                 return NULL;
  96
  97         memset(&ifr, 0, sizeof(ifr));
  98         ifr.ifr_ifindex = index;
  99
 100         err = ioctl(sk, SIOCGIFNAME, &ifr);
 101
 102         if (err == 0)
 103                 err = ioctl(sk, SIOCGIFHWADDR, &ifr);
 104
 105         close(sk);
 106
 107         if (err < 0)
 108                 return NULL;
 109
 110         len = prefix ? strlen(prefix) + 18 : 18;
 111
 112         str = malloc(len);
 113         if (!str)
 114                 return NULL;
 115
 116         eth = (void *) &ifr.ifr_hwaddr.sa_data;
 117         snprintf(str, len, "%s%02X_%02X_%02X_%02X_%02X_%02X",
 118                                                 prefix ? prefix : "",
 119                                                 eth->ether_addr_octet[0],
 120                                                 eth->ether_addr_octet[1],
 121                                                 eth->ether_addr_octet[2],
 122                                                 eth->ether_addr_octet[3],
 123                                                 eth->ether_addr_octet[4],
 124                                                 eth->ether_addr_octet[5]);
 125
 126         return str;
 127 }
 128
 129 static void detect_newlink(unsigned short type, int index,
 130                                         unsigned flags, unsigned change)
 131 {
 132         enum connman_device_type devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 133         enum connman_device_mode mode;
 134         struct connman_device *device;
 135         gchar *name, *devname;
 136
 137         DBG("type %d index %d", type, index);
 138
 139         device = find_device(index);
 140         if (device != NULL)
 141                 return;
 142
 143         devname = index2name(index);
 144         if (devname == NULL)
 145                 return;
 146
 147         if (type == ARPHRD_ETHER) {
 148                 char bridge_path[PATH_MAX], wimax_path[PATH_MAX];
 149                 struct stat st;
 150                 struct iwreq iwr;
 151                 int sk;
 152
 153                 snprintf(bridge_path, PATH_MAX,
 154                                         "/sys/class/net/%s/bridge", devname);
 155                 snprintf(wimax_path, PATH_MAX,
 156                                         "/sys/class/net/%s/wimax", devname);
 157
 158                 memset(&iwr, 0, sizeof(iwr));
 159                 strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 160
 161                 sk = socket(PF_INET, SOCK_DGRAM, 0);
 162
 163                 if (g_str_has_prefix(devname, "bnep") == TRUE)
 164                         devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 165                 else if (stat(bridge_path, &st) == 0 && (st.st_mode & S_IFDIR))
 166                         devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 167                 else if (stat(wimax_path, &st) == 0 && (st.st_mode & S_IFDIR))
 168                         devtype = CONNMAN_DEVICE_TYPE_WIMAX;
 169                 else if (ioctl(sk, SIOCGIWNAME, &iwr) == 0)
 170                         devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 171                 else
 172                         devtype = CONNMAN_DEVICE_TYPE_ETHERNET;
 173
 174                 close(sk);
 175         } else if (type == ARPHRD_NONE) {
 176                 if (g_str_has_prefix(devname, "hso") == TRUE)
 177                         devtype = CONNMAN_DEVICE_TYPE_HSO;
 178         }
 179
 180         switch (devtype) {
 181         case CONNMAN_DEVICE_TYPE_UNKNOWN:
 182                 g_free(devname);
 183                 return;
 184         case CONNMAN_DEVICE_TYPE_ETHERNET:
 185         case CONNMAN_DEVICE_TYPE_WIFI:
 186         case CONNMAN_DEVICE_TYPE_WIMAX:
 187                 name = index2ident(index, "dev_");
 188                 break;
 189         case CONNMAN_DEVICE_TYPE_BLUETOOTH:
 190         case CONNMAN_DEVICE_TYPE_HSO:
 191         case CONNMAN_DEVICE_TYPE_VENDOR:
 192                 name = strdup(devname);
 193                 break;
 194         }
 195
 196         device = connman_device_create(name, devtype);
 197         if (device == NULL) {
 198                 g_free(devname);
 199                 g_free(name);
 200                 return;
 201         }
 202
 203         switch (devtype) {
 204         case CONNMAN_DEVICE_TYPE_UNKNOWN:
 205         case CONNMAN_DEVICE_TYPE_VENDOR:
 206                 mode = CONNMAN_DEVICE_MODE_UNKNOWN;
 207                 break;
 208         case CONNMAN_DEVICE_TYPE_ETHERNET:
 209                 mode = CONNMAN_DEVICE_MODE_TRANSPORT_IP;
 210                 break;
 211         case CONNMAN_DEVICE_TYPE_WIFI:
 212         case CONNMAN_DEVICE_TYPE_WIMAX:
 213                 mode = CONNMAN_DEVICE_MODE_NETWORK_SINGLE;
 214                 break;
 215         case CONNMAN_DEVICE_TYPE_BLUETOOTH:
 216                 mode = CONNMAN_DEVICE_MODE_NETWORK_MULTIPLE;
 217                 break;
 218         case CONNMAN_DEVICE_TYPE_HSO:
 219                 mode = CONNMAN_DEVICE_MODE_NETWORK_SINGLE;
 220                 connman_device_set_policy(device, CONNMAN_DEVICE_POLICY_MANUAL);
 221                 break;
 222         }
 223
 224         connman_device_set_mode(device, mode);
 225
 226         connman_device_set_index(device, index);
 227         connman_device_set_interface(device, devname);
 228
 229         g_free(devname);
 230         g_free(name);
 231
 232         if (connman_device_register(device) < 0) {
 233                 connman_device_unref(device);
 234                 return;
 235         }
 236
 237         device_list = g_slist_append(device_list, device);
 238 }
 239
 240 static void detect_dellink(unsigned short type, int index,
 241                                         unsigned flags, unsigned change)
 242 {
 243         struct connman_device *device;
 244
 245         DBG("type %d index %d", type, index);
 246
 247         device = find_device(index);
 248         if (device == NULL)
 249                 return;
 250
 251         device_list = g_slist_remove(device_list, device);
 252
 253         connman_device_unregister(device);
 254         connman_device_unref(device);
 255 }
 256
 257 static struct connman_rtnl detect_rtnl = {
 258         .name           = "detect",
 259         .priority       = CONNMAN_RTNL_PRIORITY_LOW,
 260         .newlink        = detect_newlink,
 261         .dellink        = detect_dellink,
 262 };
 263
 264 int __connman_detect_init(void)
 265 {
 266         int err;
 267
 268         err = connman_rtnl_register(&detect_rtnl);
 269         if (err < 0)
 270                 return err;
 271
 272         connman_rtnl_send_getlink();
 273
 274         return 0;
 275 }
 276
 277 void __connman_detect_cleanup(void)
 278 {
 279         GSList *list;
 280
 281         connman_rtnl_unregister(&detect_rtnl);
 282
 283         for (list = device_list; list; list = list->next) {
 284                 struct connman_device *device = list->data;
 285
 286                 connman_device_unregister(device);
 287                 connman_device_unref(device);
 288         }
 289
 290         g_slist_free(device_list);
 291         device_list = NULL;
 292 }