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 #include <asm/types.h>
  34 #include <linux/netlink.h>
  35 #include <linux/rtnetlink.h>
  36
  37 #include "connman.h"
  38
  39 static char *index2name(int index)
  40 {
  41         struct ifreq ifr;
  42         int sk, err;
  43
  44         if (index < 0)
  45                 return NULL;
  46
  47         sk = socket(PF_INET, SOCK_DGRAM, 0);
  48         if (sk < 0)
  49                 return NULL;
  50
  51         memset(&ifr, 0, sizeof(ifr));
  52         ifr.ifr_ifindex = index;
  53
  54         err = ioctl(sk, SIOCGIFNAME, &ifr);
  55
  56         close(sk);
  57
  58         if (err < 0)
  59                 return NULL;
  60
  61         return strdup(ifr.ifr_name);
  62 }
  63
  64 static int ipv4_probe(struct connman_element *element)
  65 {
  66         struct connman_service *service;
  67         struct connman_ipconfig *ipconfig;
  68         struct connman_element *connection;
  69         const char *address = NULL, *netmask = NULL, *broadcast = NULL;
  70         const char *peer = NULL, *nameserver = NULL, *pac = NULL;
  71         char *timeserver = NULL;
  72         unsigned char prefixlen;
  73
  74         DBG("element %p name %s", element, element->name);
  75         connman_element_get_value(element,
  76                                 CONNMAN_PROPERTY_ID_IPV4_ADDRESS, &address);
  77         connman_element_get_value(element,
  78                                 CONNMAN_PROPERTY_ID_IPV4_NETMASK, &netmask);
  79         connman_element_get_value(element,
  80                                 CONNMAN_PROPERTY_ID_IPV4_BROADCAST, &broadcast);
  81         connman_element_get_value(element,
  82                                 CONNMAN_PROPERTY_ID_IPV4_PEER, &peer);
  83
  84         connman_element_get_value(element,
  85                         CONNMAN_PROPERTY_ID_IPV4_NAMESERVER, &nameserver);
  86         connman_element_get_value(element,
  87                         CONNMAN_PROPERTY_ID_IPV4_TIMESERVER, &timeserver);
  88         connman_element_get_value(element,
  89                         CONNMAN_PROPERTY_ID_IPV4_PAC, &pac);
  90
  91         DBG("address %s", address);
  92         DBG("peer %s", peer);
  93         DBG("netmask %s", netmask);
  94         DBG("broadcast %s", broadcast);
  95
  96         if (address == NULL)
  97                 return -EINVAL;
  98
  99         prefixlen = __connman_ipconfig_netmask_prefix_len(netmask);
 100
 101         if ((__connman_inet_modify_address(RTM_NEWADDR,
 102                         NLM_F_REPLACE | NLM_F_ACK, element->index,
 103                         AF_INET, address, peer, prefixlen, broadcast)) < 0)
 104                 DBG("address setting failed");
 105
 106         service = __connman_element_get_service(element);
 107
 108         if (pac != NULL)
 109                 __connman_service_set_proxy_autoconfig(service, pac);
 110
 111         if (nameserver != NULL)
 112                 __connman_service_append_nameserver(service, nameserver);
 113
 114         connman_timeserver_append(timeserver);
 115
 116         connection = connman_element_create(NULL);
 117
 118         connection->type    = CONNMAN_ELEMENT_TYPE_CONNECTION;
 119         connection->index   = element->index;
 120         connection->devname = index2name(element->index);
 121
 122         ipconfig = __connman_service_get_ipconfig(service);
 123         if (ipconfig != NULL)
 124                 __connman_ipconfig_set_element_ipv6_gateway(
 125                                                 ipconfig, connection);
 126
 127         if (connman_element_register(connection, element) < 0)
 128                 connman_element_unref(connection);
 129
 130         return 0;
 131 }
 132
 133 static void ipv4_remove(struct connman_element *element)
 134 {
 135         const char *address = NULL, *netmask = NULL, *broadcast = NULL;
 136         const char *peer = NULL, *nameserver = NULL;
 137         char *timeserver = NULL;
 138         unsigned char prefixlen;
 139
 140         DBG("element %p name %s", element, element->name);
 141
 142         connman_element_get_value(element,
 143                                 CONNMAN_PROPERTY_ID_IPV4_ADDRESS, &address);
 144         connman_element_get_value(element,
 145                                 CONNMAN_PROPERTY_ID_IPV4_NETMASK, &netmask);
 146         connman_element_get_value(element,
 147                                 CONNMAN_PROPERTY_ID_IPV4_BROADCAST, &broadcast);
 148         connman_element_get_value(element,
 149                                 CONNMAN_PROPERTY_ID_IPV4_PEER, &peer);
 150
 151         connman_element_get_value(element,
 152                         CONNMAN_PROPERTY_ID_IPV4_NAMESERVER, &nameserver);
 153         connman_element_get_value(element,
 154                         CONNMAN_PROPERTY_ID_IPV4_TIMESERVER, &timeserver);
 155
 156         connman_timeserver_remove(timeserver);
 157
 158         DBG("address %s", address);
 159         DBG("peer %s", peer);
 160         DBG("netmask %s", netmask);
 161         DBG("broadcast %s", broadcast);
 162
 163         if (nameserver != NULL) {
 164                 struct connman_service *service;
 165
 166                 service = __connman_element_get_service(element);
 167                 __connman_service_remove_nameserver(service, nameserver);
 168         }
 169
 170         prefixlen = __connman_ipconfig_netmask_prefix_len(netmask);
 171
 172         if ((__connman_inet_modify_address(RTM_DELADDR, 0, element->index,
 173                         AF_INET, address, peer, prefixlen, broadcast) < 0))
 174                 DBG("address removal failed");
 175 }
 176
 177 static struct connman_driver ipv4_driver = {
 178         .name           = "ipv4",
 179         .type           = CONNMAN_ELEMENT_TYPE_IPV4,
 180         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 181         .probe          = ipv4_probe,
 182         .remove         = ipv4_remove,
 183 };
 184
 185 int __connman_ipv4_init(void)
 186 {
 187         return connman_driver_register(&ipv4_driver);
 188 }
 189
 190 void __connman_ipv4_cleanup(void)
 191 {
 192         connman_driver_unregister(&ipv4_driver);
 193 }