src/ipv4.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 <unistd.h>
  27 #include <string.h>
  28 #include <sys/ioctl.h>
  29 #include <sys/socket.h>
  30 #include <netinet/in.h>
  31 #include <arpa/inet.h>
  32 #include <net/if.h>
  33
  34 #include "connman.h"
  35
  36 struct connman_ipv4 {
  37         enum connman_ipconfig_method method;
  38         struct in_addr address;
  39         struct in_addr netmask;
  40         struct in_addr broadcast;
  41 };
  42
  43 static int set_ipv4(struct connman_element *element, struct connman_ipv4 *ipv4)
  44 {
  45         struct ifreq ifr;
  46         struct sockaddr_in addr;
  47         int sk, err;
  48
  49         DBG("element %p ipv4 %p", element, ipv4);
  50
  51         sk = socket(PF_INET, SOCK_DGRAM, 0);
  52         if (sk < 0)
  53                 return -1;
  54
  55         memset(&ifr, 0, sizeof(ifr));
  56         ifr.ifr_ifindex = element->index;
  57
  58         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
  59                 close(sk);
  60                 return -1;
  61         }
  62
  63         DBG("ifname %s", ifr.ifr_name);
  64
  65         memset(&addr, 0, sizeof(addr));
  66         addr.sin_family = AF_INET;
  67         addr.sin_addr = ipv4->address;
  68         memcpy(&ifr.ifr_addr, &addr, sizeof(ifr.ifr_addr));
  69
  70         err = ioctl(sk, SIOCSIFADDR, &ifr);
  71
  72         if (err < 0)
  73                 DBG("address setting failed (%s)", strerror(errno));
  74
  75         memset(&addr, 0, sizeof(addr));
  76         addr.sin_family = AF_INET;
  77         addr.sin_addr = ipv4->netmask;
  78         memcpy(&ifr.ifr_netmask, &addr, sizeof(ifr.ifr_netmask));
  79
  80         err = ioctl(sk, SIOCSIFNETMASK, &ifr);
  81
  82         if (err < 0)
  83                 DBG("netmask setting failed (%s)", strerror(errno));
  84
  85         memset(&addr, 0, sizeof(addr));
  86         addr.sin_family = AF_INET;
  87         addr.sin_addr = ipv4->broadcast;
  88         memcpy(&ifr.ifr_broadaddr, &addr, sizeof(ifr.ifr_broadaddr));
  89
  90         err = ioctl(sk, SIOCSIFBRDADDR, &ifr);
  91
  92         if (err < 0)
  93                 DBG("broadcast setting failed (%s)", strerror(errno));
  94
  95         close(sk);
  96
  97         return 0;
  98 }
  99
 100 static int clear_ipv4(struct connman_element *element)
 101 {
 102         struct ifreq ifr;
 103         struct sockaddr_in addr;
 104         int sk, err;
 105
 106         DBG("element %p", element);
 107
 108         sk = socket(PF_INET, SOCK_DGRAM, 0);
 109         if (sk < 0)
 110                 return -1;
 111
 112         memset(&ifr, 0, sizeof(ifr));
 113         ifr.ifr_ifindex = element->index;
 114
 115         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 116                 close(sk);
 117                 return -1;
 118         }
 119
 120         DBG("ifname %s", ifr.ifr_name);
 121
 122         memset(&addr, 0, sizeof(addr));
 123         addr.sin_family = AF_INET;
 124         addr.sin_addr.s_addr = INADDR_ANY;
 125         memcpy(&ifr.ifr_addr, &addr, sizeof(ifr.ifr_addr));
 126
 127         //err = ioctl(sk, SIOCDIFADDR, &ifr);
 128         err = ioctl(sk, SIOCSIFADDR, &ifr);
 129
 130         close(sk);
 131
 132         if (err < 0 && errno != EADDRNOTAVAIL) {
 133                 DBG("address removal failed (%s)", strerror(errno));
 134                 return -1;
 135         }
 136
 137         return 0;
 138 }
 139
 140 static char *index2name(int index)
 141 {
 142         struct ifreq ifr;
 143         int sk, err;
 144
 145         if (index < 0)
 146                 return NULL;
 147
 148         sk = socket(PF_INET, SOCK_DGRAM, 0);
 149         if (sk < 0)
 150                 return NULL;
 151
 152         memset(&ifr, 0, sizeof(ifr));
 153         ifr.ifr_ifindex = index;
 154
 155         err = ioctl(sk, SIOCGIFNAME, &ifr);
 156
 157         close(sk);
 158
 159         if (err < 0)
 160                 return NULL;
 161
 162         return strdup(ifr.ifr_name);
 163 }
 164
 165 static int ipv4_probe(struct connman_element *element)
 166 {
 167         struct connman_service *service;
 168         struct connman_ipconfig *ipconfig;
 169         struct connman_element *connection;
 170         struct connman_ipv4 ipv4;
 171         const char *address = NULL, *netmask = NULL, *broadcast = NULL;
 172         const char *nameserver = NULL;
 173         char *timeserver = NULL;
 174
 175         DBG("element %p name %s", element, element->name);
 176
 177         connman_element_get_value(element,
 178                                 CONNMAN_PROPERTY_ID_IPV4_ADDRESS, &address);
 179         connman_element_get_value(element,
 180                                 CONNMAN_PROPERTY_ID_IPV4_NETMASK, &netmask);
 181         connman_element_get_value(element,
 182                                 CONNMAN_PROPERTY_ID_IPV4_BROADCAST, &broadcast);
 183
 184         connman_element_get_value(element,
 185                         CONNMAN_PROPERTY_ID_IPV4_NAMESERVER, &nameserver);
 186         connman_element_get_value(element,
 187                         CONNMAN_PROPERTY_ID_IPV4_TIMESERVER, &timeserver);
 188
 189         DBG("address %s", address);
 190         DBG("netmask %s", netmask);
 191         DBG("broadcast %s", broadcast);
 192
 193         if (address == NULL || netmask == NULL)
 194                 return -EINVAL;
 195
 196         memset(&ipv4, 0, sizeof(ipv4));
 197         ipv4.address.s_addr = inet_addr(address);
 198         ipv4.netmask.s_addr = inet_addr(netmask);
 199         if (broadcast)
 200                 ipv4.broadcast.s_addr = inet_addr(broadcast);
 201         else
 202                 ipv4.broadcast.s_addr = ipv4.address.s_addr |
 203                                                 ~ipv4.netmask.s_addr;
 204
 205         set_ipv4(element, &ipv4);
 206
 207         service = __connman_element_get_service(element);
 208
 209         if (nameserver != NULL)
 210                 __connman_service_append_nameserver(service, nameserver);
 211
 212         connman_timeserver_append(timeserver);
 213
 214         connection = connman_element_create(NULL);
 215
 216         connection->type    = CONNMAN_ELEMENT_TYPE_CONNECTION;
 217         connection->index   = element->index;
 218         connection->devname = index2name(element->index);
 219
 220         ipconfig = __connman_service_get_ipconfig(service);
 221         if (ipconfig != NULL)
 222                 __connman_ipconfig_set_element_ipv6_gateway(
 223                                                 ipconfig, connection);
 224
 225         if (connman_element_register(connection, element) < 0)
 226                 connman_element_unref(connection);
 227
 228         return 0;
 229 }
 230
 231 static void ipv4_remove(struct connman_element *element)
 232 {
 233         const char *nameserver = NULL;
 234         char *timeserver = NULL;
 235
 236         DBG("element %p name %s", element, element->name);
 237
 238         connman_element_get_value(element,
 239                         CONNMAN_PROPERTY_ID_IPV4_NAMESERVER, &nameserver);
 240         connman_element_get_value(element,
 241                         CONNMAN_PROPERTY_ID_IPV4_TIMESERVER, &timeserver);
 242
 243         connman_timeserver_remove(timeserver);
 244
 245         if (nameserver != NULL) {
 246                 struct connman_service *service;
 247
 248                 service = __connman_element_get_service(element);
 249                 __connman_service_remove_nameserver(service, nameserver);
 250         }
 251
 252         clear_ipv4(element);
 253 }
 254
 255 static struct connman_driver ipv4_driver = {
 256         .name           = "ipv4",
 257         .type           = CONNMAN_ELEMENT_TYPE_IPV4,
 258         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 259         .probe          = ipv4_probe,
 260         .remove         = ipv4_remove,
 261 };
 262
 263 int __connman_ipv4_init(void)
 264 {
 265         return connman_driver_register(&ipv4_driver);
 266 }
 267
 268 void __connman_ipv4_cleanup(void)
 269 {
 270         connman_driver_unregister(&ipv4_driver);
 271 }