plugins/dhcp.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 <stdio.h>
  27 #include <errno.h>
  28 #include <string.h>
  29
  30 #define CONNMAN_API_SUBJECT_TO_CHANGE
  31 #include <connman/plugin.h>
  32 #include <connman/dhcp.h>
  33 #include <connman/utsname.h>
  34 #include <connman/log.h>
  35
  36 #include <gdhcp.h>
  37
  38 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
  39 {
  40         struct connman_dhcp *dhcp = user_data;
  41
  42         DBG("No Lease Available!");
  43
  44         connman_dhcp_fail(dhcp);
  45 }
  46
  47 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
  48 {
  49         struct connman_dhcp *dhcp = user_data;
  50         GList *list, *option = NULL;
  51         char *address, *nameservers;
  52         size_t ns_strlen = 0;
  53
  54         address = g_dhcp_client_get_address(dhcp_client);
  55         if (address != NULL)
  56                 connman_dhcp_set_value(dhcp, "Address", address);
  57
  58         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
  59         if (option != NULL)
  60                 connman_dhcp_set_value(dhcp, "Netmask", (char *) option->data);
  61
  62         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
  63         for (list = option; list; list = list->next)
  64                 ns_strlen += strlen((char *) list->data) + 2;
  65         nameservers = g_try_malloc0(ns_strlen);
  66         if (nameservers) {
  67                 char *ns_index = nameservers;
  68
  69                 for (list = option; list; list = list->next) {
  70                         sprintf(ns_index, "%s ", (char *) list->data);
  71                         ns_index += strlen((char *) list->data) + 1;
  72                 }
  73
  74                 connman_dhcp_set_value(dhcp, "Nameserver", nameservers);
  75         }
  76         g_free(nameservers);
  77
  78         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
  79         if (option != NULL)
  80                 connman_dhcp_set_value(dhcp, "Gateway", (char *) option->data);
  81
  82         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
  83         if (option != NULL)
  84                 connman_dhcp_set_value(dhcp, "Hostname", (char *) option->data);
  85
  86         connman_dhcp_bound(dhcp);
  87 }
  88
  89 static int dhcp_request(struct connman_dhcp *dhcp)
  90 {
  91         GDHCPClient *dhcp_client;
  92         GDHCPClientError error;
  93         int index;
  94
  95         DBG("dhcp %p", dhcp);
  96
  97         index = connman_dhcp_get_index(dhcp);
  98
  99         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 100         if (error != G_DHCP_CLIENT_ERROR_NONE)
 101                 return -EINVAL;
 102
 103         g_dhcp_client_set_send(dhcp_client, G_DHCP_HOST_NAME,
 104                                 connman_utsname_get_hostname());
 105
 106         g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 107         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 108         g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 109         g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 110         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 111
 112         g_dhcp_client_register_event(dhcp_client,
 113                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 114                                                 lease_available_cb, dhcp);
 115
 116         g_dhcp_client_register_event(dhcp_client,
 117                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 118
 119         connman_dhcp_set_data(dhcp, dhcp_client);
 120
 121         g_dhcp_client_ref(dhcp_client);
 122
 123         return g_dhcp_client_start(dhcp_client);
 124 }
 125
 126 static int dhcp_release(struct connman_dhcp *dhcp)
 127 {
 128         GDHCPClient *dhcp_client = connman_dhcp_get_data(dhcp);
 129
 130         DBG("dhcp %p", dhcp);
 131
 132         g_dhcp_client_stop(dhcp_client);
 133         g_dhcp_client_unref(dhcp_client);
 134
 135         return 0;
 136 }
 137
 138 static struct connman_dhcp_driver dhcp_driver = {
 139         .name           = "dhcp",
 140         .priority       = CONNMAN_DHCP_PRIORITY_DEFAULT,
 141         .request        = dhcp_request,
 142         .release        = dhcp_release,
 143 };
 144
 145 static int dhcp_init(void)
 146 {
 147         return connman_dhcp_driver_register(&dhcp_driver);
 148 }
 149
 150 static void dhcp_exit(void)
 151 {
 152         connman_dhcp_driver_unregister(&dhcp_driver);
 153 }
 154
 155 CONNMAN_PLUGIN_DEFINE(dhcp, "Generic DHCP plugin", VERSION,
 156                         CONNMAN_PLUGIN_PRIORITY_LOW, dhcp_init, dhcp_exit)