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 #include <stdlib.h>
  30
  31 #define CONNMAN_API_SUBJECT_TO_CHANGE
  32 #include <connman/plugin.h>
  33 #include <connman/dhcp.h>
  34 #include <connman/utsname.h>
  35 #include <connman/log.h>
  36
  37 #include <gdhcp/gdhcp.h>
  38
  39 static void dhcp_debug(const char *str, void *data)
  40 {
  41         connman_info("%s: %s\n", (const char *) data, str);
  42 }
  43
  44 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
  45 {
  46         struct connman_dhcp *dhcp = user_data;
  47
  48         DBG("No lease available");
  49
  50         connman_dhcp_fail(dhcp);
  51 }
  52
  53 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
  54 {
  55         DBG("Lease lost");
  56 }
  57
  58 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
  59 {
  60         struct connman_dhcp *dhcp = user_data;
  61         GList *list, *option = NULL;
  62         char *address, *nameservers;
  63         size_t ns_strlen = 0;
  64
  65         DBG("Lease available");
  66
  67         address = g_dhcp_client_get_address(dhcp_client);
  68         if (address != NULL)
  69                 connman_dhcp_set_value(dhcp, "Address", address);
  70
  71         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
  72         if (option != NULL)
  73                 connman_dhcp_set_value(dhcp, "Netmask", (char *) option->data);
  74
  75         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
  76         for (list = option; list; list = list->next)
  77                 ns_strlen += strlen((char *) list->data) + 2;
  78         nameservers = g_try_malloc0(ns_strlen);
  79         if (nameservers) {
  80                 char *ns_index = nameservers;
  81
  82                 for (list = option; list; list = list->next) {
  83                         sprintf(ns_index, "%s ", (char *) list->data);
  84                         ns_index += strlen((char *) list->data) + 1;
  85                 }
  86
  87                 connman_dhcp_set_value(dhcp, "Nameserver", nameservers);
  88         }
  89         g_free(nameservers);
  90
  91         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
  92         if (option != NULL)
  93                 connman_dhcp_set_value(dhcp, "Gateway", (char *) option->data);
  94
  95         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
  96         if (option != NULL)
  97                 connman_dhcp_set_value(dhcp, "Hostname", (char *) option->data);
  98
  99         connman_dhcp_bound(dhcp);
 100 }
 101
 102 static int dhcp_request(struct connman_dhcp *dhcp)
 103 {
 104         GDHCPClient *dhcp_client;
 105         GDHCPClientError error;
 106         int index;
 107
 108         DBG("dhcp %p", dhcp);
 109
 110         index = connman_dhcp_get_index(dhcp);
 111
 112         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 113         if (error != G_DHCP_CLIENT_ERROR_NONE)
 114                 return -EINVAL;
 115
 116         if (getenv("CONNMAN_DHCP_DEBUG"))
 117                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug, "DHCP");
 118
 119         g_dhcp_client_set_send(dhcp_client, G_DHCP_HOST_NAME,
 120                                 connman_utsname_get_hostname());
 121
 122         g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 123         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 124         g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 125         g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 126         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 127
 128         g_dhcp_client_register_event(dhcp_client,
 129                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 130                                                 lease_available_cb, dhcp);
 131
 132         g_dhcp_client_register_event(dhcp_client,
 133                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 134
 135         g_dhcp_client_register_event(dhcp_client,
 136                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 137
 138         connman_dhcp_set_data(dhcp, dhcp_client);
 139
 140         g_dhcp_client_ref(dhcp_client);
 141
 142         return g_dhcp_client_start(dhcp_client);
 143 }
 144
 145 static int dhcp_release(struct connman_dhcp *dhcp)
 146 {
 147         GDHCPClient *dhcp_client = connman_dhcp_get_data(dhcp);
 148
 149         DBG("dhcp %p", dhcp);
 150
 151         g_dhcp_client_stop(dhcp_client);
 152         g_dhcp_client_unref(dhcp_client);
 153
 154         return 0;
 155 }
 156
 157 static struct connman_dhcp_driver dhcp_driver = {
 158         .name           = "dhcp",
 159         .priority       = CONNMAN_DHCP_PRIORITY_DEFAULT,
 160         .request        = dhcp_request,
 161         .release        = dhcp_release,
 162 };
 163
 164 static int dhcp_init(void)
 165 {
 166         return connman_dhcp_driver_register(&dhcp_driver);
 167 }
 168
 169 static void dhcp_exit(void)
 170 {
 171         connman_dhcp_driver_unregister(&dhcp_driver);
 172 }
 173
 174 CONNMAN_PLUGIN_DEFINE(dhcp, "Generic DHCP plugin", VERSION,
 175                         CONNMAN_PLUGIN_PRIORITY_LOW, dhcp_init, dhcp_exit)