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 ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
  59 {
  60         struct connman_dhcp *dhcp = user_data;
  61
  62         DBG("Lease lost");
  63
  64         connman_dhcp_release(dhcp);
  65 }
  66
  67 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
  68 {
  69         struct connman_dhcp *dhcp = user_data;
  70         GList *list, *option = NULL;
  71         char *address, *nameservers;
  72         size_t ns_strlen = 0;
  73
  74         DBG("Lease available");
  75
  76         address = g_dhcp_client_get_address(dhcp_client);
  77         if (address != NULL)
  78                 connman_dhcp_set_value(dhcp, "Address", address);
  79
  80         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
  81         if (option != NULL)
  82                 connman_dhcp_set_value(dhcp, "Netmask", option->data);
  83
  84         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
  85         for (list = option; list; list = list->next)
  86                 ns_strlen += strlen((char *) list->data) + 2;
  87         nameservers = g_try_malloc0(ns_strlen);
  88         if (nameservers) {
  89                 char *ns_index = nameservers;
  90
  91                 for (list = option; list; list = list->next) {
  92                         sprintf(ns_index, "%s ", (char *) list->data);
  93                         ns_index += strlen((char *) list->data) + 1;
  94                 }
  95
  96                 connman_dhcp_set_value(dhcp, "Nameserver", nameservers);
  97         }
  98         g_free(nameservers);
  99
 100         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 101         if (option != NULL)
 102                 connman_dhcp_set_value(dhcp, "Domainname", option->data);
 103
 104         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 105         if (option != NULL)
 106                 connman_dhcp_set_value(dhcp, "Gateway", option->data);
 107
 108         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 109         if (option != NULL)
 110                 connman_dhcp_set_value(dhcp, "Hostname", option->data);
 111
 112         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 113         if (option != NULL)
 114                 connman_dhcp_set_value(dhcp, "Timeserver", option->data);
 115
 116         option = g_dhcp_client_get_option(dhcp_client, 252);
 117         if (option != NULL)
 118                 connman_dhcp_set_value(dhcp, "PAC", option->data);
 119
 120         connman_dhcp_bound(dhcp);
 121 }
 122
 123 static void ipv4ll_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 124 {
 125         struct connman_dhcp *dhcp = user_data;
 126         char *address, *netmask;
 127
 128         DBG("IPV4LL available");
 129
 130         address = g_dhcp_client_get_address(dhcp_client);
 131         if (address != NULL)
 132                 connman_dhcp_set_value(dhcp, "Address", address);
 133
 134         netmask = g_dhcp_client_get_netmask(dhcp_client);
 135         if (netmask != NULL)
 136                 connman_dhcp_set_value(dhcp, "Netmask", netmask);
 137
 138         g_free(address);
 139         g_free(netmask);
 140
 141         connman_dhcp_bound(dhcp);
 142 }
 143
 144 static int dhcp_request(struct connman_dhcp *dhcp)
 145 {
 146         GDHCPClient *dhcp_client;
 147         GDHCPClientError error;
 148         const char *hostname;
 149         int index;
 150
 151         DBG("dhcp %p", dhcp);
 152
 153         index = connman_dhcp_get_index(dhcp);
 154
 155         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 156         if (error != G_DHCP_CLIENT_ERROR_NONE)
 157                 return -EINVAL;
 158
 159         if (getenv("CONNMAN_DHCP_DEBUG"))
 160                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug, "DHCP");
 161
 162         hostname = connman_utsname_get_hostname();
 163         if (hostname != NULL)
 164                 g_dhcp_client_set_send(dhcp_client, G_DHCP_HOST_NAME, hostname);
 165
 166         g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 167         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 168         g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 169         g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 170         g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 171         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 172         g_dhcp_client_set_request(dhcp_client, 252);
 173
 174         g_dhcp_client_register_event(dhcp_client,
 175                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 176                                                 lease_available_cb, dhcp);
 177
 178         g_dhcp_client_register_event(dhcp_client,
 179                         G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE,
 180                                                 ipv4ll_available_cb, dhcp);
 181
 182         g_dhcp_client_register_event(dhcp_client,
 183                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 184
 185         g_dhcp_client_register_event(dhcp_client,
 186                         G_DHCP_CLIENT_EVENT_IPV4LL_LOST, ipv4ll_lost_cb, dhcp);
 187
 188         g_dhcp_client_register_event(dhcp_client,
 189                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 190
 191         connman_dhcp_set_data(dhcp, dhcp_client);
 192
 193         g_dhcp_client_ref(dhcp_client);
 194
 195         return g_dhcp_client_start(dhcp_client);
 196 }
 197
 198 static int dhcp_release(struct connman_dhcp *dhcp)
 199 {
 200         GDHCPClient *dhcp_client = connman_dhcp_get_data(dhcp);
 201
 202         DBG("dhcp %p", dhcp);
 203
 204         g_dhcp_client_stop(dhcp_client);
 205         g_dhcp_client_unref(dhcp_client);
 206
 207         return 0;
 208 }
 209
 210 static struct connman_dhcp_driver dhcp_driver = {
 211         .name           = "dhcp",
 212         .priority       = CONNMAN_DHCP_PRIORITY_DEFAULT,
 213         .request        = dhcp_request,
 214         .release        = dhcp_release,
 215 };
 216
 217 static int dhcp_init(void)
 218 {
 219         return connman_dhcp_driver_register(&dhcp_driver);
 220 }
 221
 222 static void dhcp_exit(void)
 223 {
 224         connman_dhcp_driver_unregister(&dhcp_driver);
 225 }
 226
 227 CONNMAN_PLUGIN_DEFINE(dhcp, "Generic DHCP plugin", VERSION,
 228                         CONNMAN_PLUGIN_PRIORITY_DEFAULT, dhcp_init, dhcp_exit)