plugins/resolvconf.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 <unistd.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/socket.h>
  32 #include <net/if.h>
  33
  34 #include <connman/plugin.h>
  35 #include <connman/resolver.h>
  36 #include <connman/log.h>
  37
  38 static int resolvconf_append(struct connman_iface *iface, const char *nameserver)
  39 {
  40         struct ifreq ifr;
  41         char cmd[128];
  42         int sk, err;
  43
  44         sk = socket(PF_INET, SOCK_DGRAM, 0);
  45         if (sk < 0)
  46                 return -1;
  47
  48         memset(&ifr, 0, sizeof(ifr));
  49         ifr.ifr_ifindex = iface->index;
  50
  51         err = ioctl(sk, SIOCGIFNAME, &ifr);
  52
  53         close(sk);
  54
  55         if (err < 0)
  56                 return -1;
  57
  58         DBG("ifname %s", ifr.ifr_name);
  59
  60         snprintf(cmd, sizeof(cmd), "echo \"nameserver %s\" | resolvconf -a %s",
  61                                                 nameserver, ifr.ifr_name);
  62
  63         DBG("%s", cmd);
  64
  65         err = system(cmd);
  66
  67         return 0;
  68 }
  69
  70 static int resolvconf_remove(struct connman_iface *iface)
  71 {
  72         struct ifreq ifr;
  73         char cmd[128];
  74         int sk, err;
  75
  76         sk = socket(PF_INET, SOCK_DGRAM, 0);
  77         if (sk < 0)
  78                 return -1;
  79
  80         memset(&ifr, 0, sizeof(ifr));
  81         ifr.ifr_ifindex = iface->index;
  82
  83         err = ioctl(sk, SIOCGIFNAME, &ifr);
  84
  85         close(sk);
  86
  87         if (err < 0)
  88                 return -1;
  89
  90         DBG("ifname %s", ifr.ifr_name);
  91
  92         snprintf(cmd, sizeof(cmd), "resolvconf -d %s", ifr.ifr_name);
  93
  94         DBG("%s", cmd);
  95
  96         err = system(cmd);
  97
  98         return 0;
  99 }
 100
 101 static struct connman_resolver_driver resolvconf_driver = {
 102         .name           = "resolvconf",
 103         .append         = resolvconf_append,
 104         .remove         = resolvconf_remove,
 105 };
 106
 107 static int resolvconf_init(void)
 108 {
 109         return connman_resolver_register(&resolvconf_driver);
 110 }
 111
 112 static void resolvconf_exit(void)
 113 {
 114         connman_resolver_unregister(&resolvconf_driver);
 115 }
 116
 117 CONNMAN_PLUGIN_DEFINE("resolvconf", "Name resolver plugin", VERSION,
 118                                         resolvconf_init, resolvconf_exit)