src/wpad.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 <stdlib.h>
  27 #include <string.h>
  28
  29 #include <gresolv/gresolv.h>
  30
  31 #include "connman.h"
  32
  33 struct connman_wpad {
  34         struct connman_service *service;
  35         GResolv *resolv;
  36         char *hostname;
  37 };
  38
  39 static GHashTable *wpad_list = NULL;
  40
  41 static void resolv_debug(const char *str, void *data)
  42 {
  43         connman_info("%s: %s\n", (const char *) data, str);
  44 }
  45
  46 static void free_wpad(gpointer data)
  47 {
  48         struct connman_wpad *wpad = data;
  49
  50         g_resolv_unref(wpad->resolv);
  51
  52         g_free(wpad->hostname);
  53         g_free(wpad);
  54 }
  55
  56 static void wpad_result(GResolvResultStatus status,
  57                                         char **results, gpointer user_data)
  58 {
  59         struct connman_wpad *wpad = user_data;
  60         const char *ptr;
  61         char *hostname;
  62
  63         DBG("status %d", status);
  64
  65         if (status == G_RESOLV_RESULT_STATUS_SUCCESS) {
  66                 char *url;
  67
  68                 url = g_strdup_printf("http://%s/wpad.dat", wpad->hostname);
  69                 __connman_service_set_proxy_autoconfig(wpad->service, url);
  70                 g_free(url);
  71
  72                 return;
  73         }
  74
  75         hostname = wpad->hostname;
  76
  77         if (strlen(hostname) < 6)
  78                 return;
  79
  80         ptr = strchr(hostname + 5, '.');
  81         if (ptr == NULL || strlen(ptr) < 2)
  82                 return;
  83
  84         if (strchr(ptr + 1, '.') == NULL)
  85                 return;
  86
  87         wpad->hostname = g_strdup_printf("wpad.%s", ptr + 1);
  88         g_free(hostname);
  89
  90         DBG("hostname %s", wpad->hostname);
  91
  92         g_resolv_lookup_hostname(wpad->resolv, wpad->hostname,
  93                                                         wpad_result, wpad);
  94 }
  95
  96 void __connman_wpad_start(struct connman_service *service)
  97 {
  98         struct connman_wpad *wpad;
  99         const char *domainname, *nameserver;
 100         int index;
 101
 102         DBG("service %p", service);
 103
 104         if (wpad_list == NULL)
 105                 return;
 106
 107         index = __connman_service_get_index(service);
 108         if (index < 0)
 109                 return;
 110
 111         domainname = __connman_service_get_domainname(service);
 112         if (domainname == NULL)
 113                 return;
 114
 115         nameserver = __connman_service_get_nameserver(service);
 116         if (nameserver == NULL)
 117                 return;
 118
 119         wpad = g_try_new0(struct connman_wpad, 1);
 120         if (wpad == NULL)
 121                 return;
 122
 123         wpad->service = service;
 124         wpad->resolv = g_resolv_new(index);
 125         if (wpad->resolv == NULL) {
 126                 g_free(wpad);
 127                 return;
 128         }
 129
 130         if (getenv("CONNMAN_RESOLV_DEBUG"))
 131                 g_resolv_set_debug(wpad->resolv, resolv_debug, "RESOLV");
 132
 133         g_resolv_add_nameserver(wpad->resolv, nameserver, 53, 0);
 134
 135         wpad->hostname = g_strdup_printf("wpad.%s", domainname);
 136
 137         DBG("hostname %s", wpad->hostname);
 138
 139         g_resolv_lookup_hostname(wpad->resolv, wpad->hostname,
 140                                                         wpad_result, wpad);
 141
 142         g_hash_table_replace(wpad_list, GINT_TO_POINTER(index), wpad);
 143 }
 144
 145 void __connman_wpad_stop(struct connman_service *service)
 146 {
 147         int index;
 148
 149         DBG("service %p", service);
 150
 151         if (wpad_list == NULL)
 152                 return;
 153
 154         index = __connman_service_get_index(service);
 155         if (index < 0)
 156                 return;
 157
 158         g_hash_table_remove(wpad_list, GINT_TO_POINTER(index));
 159 }
 160
 161 int __connman_wpad_init(void)
 162 {
 163         DBG("");
 164
 165         wpad_list = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 166                                                         NULL, free_wpad);
 167
 168         return 0;
 169 }
 170
 171 void __connman_wpad_cleanup(void)
 172 {
 173         DBG("");
 174
 175         g_hash_table_destroy(wpad_list);
 176         wpad_list = NULL;
 177 }