src/detect.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  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 <connman/device.h>
  39 #include <connman/rtnl.h>
  40 #include <connman/log.h>
  41
  42 #include "connman.h"
  43
  44 static GSList *device_list = NULL;
  45
  46 static struct connman_device *find_device(int index)
  47 {
  48         GSList *list;
  49
  50         for (list = device_list; list; list = list->next) {
  51                 struct connman_device *device = list->data;
  52
  53                 if (connman_device_get_index(device) == index)
  54                         return device;
  55         }
  56
  57         return NULL;
  58 }
  59
  60 static char *index2name(int index)
  61 {
  62         struct ifreq ifr;
  63         int sk, err;
  64
  65         if (index < 0)
  66                 return NULL;
  67
  68         sk = socket(PF_INET, SOCK_DGRAM, 0);
  69         if (sk < 0)
  70                 return NULL;
  71
  72         memset(&ifr, 0, sizeof(ifr));
  73         ifr.ifr_ifindex = index;
  74
  75         err = ioctl(sk, SIOCGIFNAME, &ifr);
  76
  77         close(sk);
  78
  79         if (err < 0)
  80                 return NULL;
  81
  82         return strdup(ifr.ifr_name);
  83 }
  84
  85 static char *index2ident(int index, const char *prefix)
  86 {
  87         struct ifreq ifr;
  88         struct ether_addr *eth;
  89         char *str;
  90         int sk, err, len;
  91
  92         if (index < 0)
  93                 return NULL;
  94
  95         sk = socket(PF_INET, SOCK_DGRAM, 0);
  96         if (sk < 0)
  97                 return NULL;
  98
  99         memset(&ifr, 0, sizeof(ifr));
 100         ifr.ifr_ifindex = index;
 101
 102         err = ioctl(sk, SIOCGIFNAME, &ifr);
 103
 104         if (err == 0)
 105                 err = ioctl(sk, SIOCGIFHWADDR, &ifr);
 106
 107         close(sk);
 108
 109         if (err < 0)
 110                 return NULL;
 111
 112         len = prefix ? strlen(prefix) + 18 : 18;
 113
 114         str = malloc(len);
 115         if (!str)
 116                 return NULL;
 117
 118         eth = (void *) &ifr.ifr_hwaddr.sa_data;
 119         snprintf(str, len, "%s%02X_%02X_%02X_%02X_%02X_%02X",
 120                                                 prefix ? prefix : "",
 121                                                 eth->ether_addr_octet[0],
 122                                                 eth->ether_addr_octet[1],
 123                                                 eth->ether_addr_octet[2],
 124                                                 eth->ether_addr_octet[3],
 125                                                 eth->ether_addr_octet[4],
 126                                                 eth->ether_addr_octet[5]);
 127
 128         return str;
 129 }
 130
 131 static void detect_newlink(unsigned short type, int index,
 132                                         unsigned flags, unsigned change)
 133 {
 134         enum connman_device_type devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 135         struct connman_device *device;
 136         gchar *name, *devname;
 137
 138         DBG("type %d index %d", type, index);
 139
 140         device = find_device(index);
 141         if (device != NULL)
 142                 return;
 143
 144         devname = index2name(index);
 145
 146         if (type == ARPHRD_ETHER) {
 147                 char bridge_path[PATH_MAX], wimax_path[PATH_MAX];
 148                 struct stat st;
 149                 struct iwreq iwr;
 150                 int sk;
 151
 152                 snprintf(bridge_path, PATH_MAX,
 153                                         "/sys/class/net/%s/bridge", devname);
 154                 snprintf(wimax_path, PATH_MAX,
 155                                         "/sys/class/net/%s/wimax", devname);
 156
 157                 memset(&iwr, 0, sizeof(iwr));
 158                 strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 159
 160                 sk = socket(PF_INET, SOCK_DGRAM, 0);
 161
 162                 if (g_str_has_prefix(devname, "bnep") == TRUE)
 163                         devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 164                 else if (stat(bridge_path, &st) == 0 && (st.st_mode & S_IFDIR))
 165                         devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 166                 else if (stat(wimax_path, &st) == 0 && (st.st_mode & S_IFDIR))
 167                         devtype = CONNMAN_DEVICE_TYPE_WIMAX;
 168                 else if (ioctl(sk, SIOCGIWNAME, &iwr) == 0)
 169                         devtype = CONNMAN_DEVICE_TYPE_UNKNOWN;
 170                 else
 171                         devtype = CONNMAN_DEVICE_TYPE_ETHERNET;
 172
 173                 close(sk);
 174         } else if (type == ARPHRD_NONE) {
 175                 if (g_str_has_prefix(devname, "hso") == TRUE)
 176                         devtype = CONNMAN_DEVICE_TYPE_HSO;
 177         }
 178
 179         if (devtype == CONNMAN_DEVICE_TYPE_UNKNOWN) {
 180                 g_free(devname);
 181                 return;
 182         }
 183
 184         switch (devtype) {
 185         case CONNMAN_DEVICE_TYPE_HSO:
 186                 name = strdup(devname);
 187                 break;
 188         default:
 189                 name = index2ident(index, "dev_");
 190                 break;
 191         }
 192
 193         device = connman_device_create(name, devtype);
 194         if (device == NULL) {
 195                 g_free(devname);
 196                 g_free(name);
 197                 return;
 198         }
 199
 200         connman_device_set_index(device, index);
 201         connman_device_set_interface(device, devname);
 202
 203         g_free(devname);
 204         g_free(name);
 205
 206         if (connman_device_register(device) < 0) {
 207                 connman_device_unref(device);
 208                 return;
 209         }
 210
 211         device_list = g_slist_append(device_list, device);
 212 }
 213
 214 static void detect_dellink(unsigned short type, int index,
 215                                         unsigned flags, unsigned change)
 216 {
 217         struct connman_device *device;
 218
 219         DBG("type %d index %d", type, index);
 220
 221         device = find_device(index);
 222         if (device == NULL)
 223                 return;
 224
 225         device_list = g_slist_remove(device_list, device);
 226
 227         connman_device_unregister(device);
 228         connman_device_unref(device);
 229 }
 230
 231 static struct connman_rtnl detect_rtnl = {
 232         .name           = "detect",
 233         .priority       = CONNMAN_RTNL_PRIORITY_LOW,
 234         .newlink        = detect_newlink,
 235         .dellink        = detect_dellink,
 236 };
 237
 238 int __connman_detect_init(void)
 239 {
 240         int err;
 241
 242         err = connman_rtnl_register(&detect_rtnl);
 243         if (err < 0)
 244                 return err;
 245
 246         connman_rtnl_send_getlink();
 247
 248         return 0;
 249 }
 250
 251 void __connman_detect_cleanup(void)
 252 {
 253         GSList *list;
 254
 255         connman_rtnl_unregister(&detect_rtnl);
 256
 257         for (list = device_list; list; list = list->next) {
 258                 struct connman_device *device = list->data;
 259
 260                 connman_device_unregister(device);
 261                 connman_device_unref(device);
 262         }
 263
 264         g_slist_free(device_list);
 265         device_list = NULL;
 266 }