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 <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         struct connman_device *device;
 134         gchar *name, *devname;
 135
 136         DBG("type %d index %d", type, index);
 137
 138         device = find_device(index);
 139         if (device != NULL)
 140                 return;
 141
 142         devname = index2name(index);
 143         if (devname == NULL)
 144                 return;
 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         switch (devtype) {
 201         case CONNMAN_DEVICE_TYPE_HSO:
 202                 connman_device_set_policy(device, CONNMAN_DEVICE_POLICY_MANUAL);
 203                 connman_device_set_mode(device,
 204                                         CONNMAN_DEVICE_MODE_SINGLE_NETWORK);
 205                 break;
 206         default:
 207                 break;
 208         }
 209
 210         connman_device_set_index(device, index);
 211         connman_device_set_interface(device, devname);
 212
 213         g_free(devname);
 214         g_free(name);
 215
 216         if (connman_device_register(device) < 0) {
 217                 connman_device_unref(device);
 218                 return;
 219         }
 220
 221         device_list = g_slist_append(device_list, device);
 222 }
 223
 224 static void detect_dellink(unsigned short type, int index,
 225                                         unsigned flags, unsigned change)
 226 {
 227         struct connman_device *device;
 228
 229         DBG("type %d index %d", type, index);
 230
 231         device = find_device(index);
 232         if (device == NULL)
 233                 return;
 234
 235         device_list = g_slist_remove(device_list, device);
 236
 237         connman_device_unregister(device);
 238         connman_device_unref(device);
 239 }
 240
 241 static struct connman_rtnl detect_rtnl = {
 242         .name           = "detect",
 243         .priority       = CONNMAN_RTNL_PRIORITY_LOW,
 244         .newlink        = detect_newlink,
 245         .dellink        = detect_dellink,
 246 };
 247
 248 int __connman_detect_init(void)
 249 {
 250         int err;
 251
 252         err = connman_rtnl_register(&detect_rtnl);
 253         if (err < 0)
 254                 return err;
 255
 256         connman_rtnl_send_getlink();
 257
 258         return 0;
 259 }
 260
 261 void __connman_detect_cleanup(void)
 262 {
 263         GSList *list;
 264
 265         connman_rtnl_unregister(&detect_rtnl);
 266
 267         for (list = device_list; list; list = list->next) {
 268                 struct connman_device *device = list->data;
 269
 270                 connman_device_unregister(device);
 271                 connman_device_unref(device);
 272         }
 273
 274         g_slist_free(device_list);
 275         device_list = NULL;
 276 }