wpa_supplicant: dbus_new_handlers

00001 /*
00002  * WPA Supplicant / dbus-based control interface (WPS)
00003  * Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
00004  * Copyright (c) 2009, Witold Sowa <witold.sowa@gmail.com>
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License version 2 as
00008  * published by the Free Software Foundation.
00009  *
00010  * Alternatively, this software may be distributed under the terms of BSD
00011  * license.
00012  *
00013  * See README and COPYING for more details.
00014  */
00015 
00016 #include "includes.h"
00017 
00018 #include "common.h"
00019 #include "../config.h"
00020 #include "../wpa_supplicant_i.h"
00021 #include "../wps_supplicant.h"
00022 #include "dbus_new_helpers.h"
00023 #include "dbus_new.h"
00024 #include "dbus_new_handlers.h"
00025 #include "dbus_dict_helpers.h"
00026 
00027 
00028 struct wps_start_params {
00029         int role; /* 0 - not set, 1 - enrollee, 2 - registrar */
00030         int type; /* 0 - not set, 1 - pin,      2 - pbc       */
00031         u8 *bssid;
00032         char *pin;
00033 };
00034 
00035 
00036 static int wpas_dbus_handler_wps_role(DBusMessage *message,
00037                                       DBusMessageIter *entry_iter,
00038                                       struct wps_start_params *params,
00039                                       DBusMessage **reply)
00040 {
00041         DBusMessageIter variant_iter;
00042         char *val;
00043 
00044         dbus_message_iter_recurse(entry_iter, &variant_iter);
00045         if (dbus_message_iter_get_arg_type(&variant_iter) !=
00046             DBUS_TYPE_STRING) {
00047                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Wrong Role type, "
00048                            "string required");
00049                 *reply = wpas_dbus_error_invalid_args(message,
00050                                                       "Role must be a string");
00051                 return -1;
00052         }
00053         dbus_message_iter_get_basic(&variant_iter, &val);
00054         if (os_strcmp(val, "enrollee") == 0)
00055                 params->role = 1;
00056         else if (os_strcmp(val, "registrar") == 0)
00057                 params->role = 2;
00058         else {
00059                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Uknown role %s", val);
00060                 *reply = wpas_dbus_error_invalid_args(message, val);
00061                 return -1;
00062         }
00063         return 0;
00064 }
00065 
00066 
00067 static int wpas_dbus_handler_wps_type(DBusMessage *message,
00068                                       DBusMessageIter *entry_iter,
00069                                       struct wps_start_params *params,
00070                                       DBusMessage **reply)
00071 {
00072         DBusMessageIter variant_iter;
00073         char *val;
00074 
00075         dbus_message_iter_recurse(entry_iter, &variant_iter);
00076         if (dbus_message_iter_get_arg_type(&variant_iter) !=
00077             DBUS_TYPE_STRING) {
00078                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Wrong Type type, "
00079                            "string required");
00080                 *reply = wpas_dbus_error_invalid_args(message,
00081                                                       "Type must be a string");
00082                 return -1;
00083         }
00084         dbus_message_iter_get_basic(&variant_iter, &val);
00085         if (os_strcmp(val, "pin") == 0)
00086                 params->type = 1;
00087         else if (os_strcmp(val, "pbc") == 0)
00088                 params->type = 2;
00089         else {
00090                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Unknown type %s",
00091                            val);
00092                 *reply = wpas_dbus_error_invalid_args(message, val);
00093                 return -1;
00094         }
00095         return 0;
00096 }
00097 
00098 
00099 static int wpas_dbus_handler_wps_bssid(DBusMessage *message,
00100                                        DBusMessageIter *entry_iter,
00101                                        struct wps_start_params *params,
00102                                        DBusMessage **reply)
00103 {
00104         DBusMessageIter variant_iter, array_iter;
00105         int len;
00106 
00107         dbus_message_iter_recurse(entry_iter, &variant_iter);
00108         if (dbus_message_iter_get_arg_type(&variant_iter) != DBUS_TYPE_ARRAY ||
00109             dbus_message_iter_get_element_type(&variant_iter) !=
00110             DBUS_TYPE_ARRAY) {
00111                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Wrong Bssid type, "
00112                            "byte array required");
00113                 *reply = wpas_dbus_error_invalid_args(
00114                         message, "Bssid must be a byte array");
00115                 return -1;
00116         }
00117         dbus_message_iter_recurse(&variant_iter, &array_iter);
00118         dbus_message_iter_get_fixed_array(&array_iter, &params->bssid, &len);
00119         if (len != ETH_ALEN) {
00120                 wpa_printf(MSG_DEBUG, "dbus: WPS.Stsrt - Wrong Bssid length "
00121                            "%d", len);
00122                 *reply = wpas_dbus_error_invalid_args(message,
00123                                                       "Bssid is wrong length");
00124                 return -1;
00125         }
00126         return 0;
00127 }
00128 
00129 
00130 static int wpas_dbus_handler_wps_pin(DBusMessage *message,
00131                                      DBusMessageIter *entry_iter,
00132                                      struct wps_start_params *params,
00133                                      DBusMessage **reply)
00134 {
00135         DBusMessageIter variant_iter;
00136 
00137         dbus_message_iter_recurse(entry_iter, &variant_iter);
00138         if (dbus_message_iter_get_arg_type(&variant_iter) !=
00139             DBUS_TYPE_STRING) {
00140                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Wrong Pin type, "
00141                            "string required");
00142                 *reply = wpas_dbus_error_invalid_args(message,
00143                                                       "Pin must be a string");
00144                 return -1;
00145         }
00146         dbus_message_iter_get_basic(&variant_iter, &params->pin);
00147         return 0;
00148 }
00149 
00150 
00151 static int wpas_dbus_handler_wps_start_entry(DBusMessage *message, char *key,
00152                                              DBusMessageIter *entry_iter,
00153                                              struct wps_start_params *params,
00154                                              DBusMessage **reply)
00155 {
00156         if (os_strcmp(key, "Role") == 0)
00157                 return wpas_dbus_handler_wps_role(message, entry_iter,
00158                                                   params, reply);
00159         else if (os_strcmp(key, "Type") == 0)
00160                 return wpas_dbus_handler_wps_type(message, entry_iter,
00161                                                   params, reply);
00162         else if (os_strcmp(key, "Bssid") == 0)
00163                 return wpas_dbus_handler_wps_bssid(message, entry_iter,
00164                                                    params, reply);
00165         else if (os_strcmp(key, "Pin") == 0)
00166                 return wpas_dbus_handler_wps_pin(message, entry_iter,
00167                                                  params, reply);
00168 
00169         wpa_printf(MSG_DEBUG, "dbus: WPS.Start - unknown key %s", key);
00170         *reply = wpas_dbus_error_invalid_args(message, key);
00171         return -1;
00172 }
00173 
00174 
00186 DBusMessage * wpas_dbus_handler_wps_start(DBusMessage *message,
00187                                           struct wpa_supplicant *wpa_s)
00188 {
00189         DBusMessage *reply = NULL;
00190         DBusMessageIter iter, dict_iter, entry_iter;
00191         struct wps_start_params params;
00192         char *key;
00193         char npin[9] = { '\0' };
00194         int ret;
00195 
00196         os_memset(&params, 0, sizeof(params));
00197         dbus_message_iter_init(message, &iter);
00198 
00199         dbus_message_iter_recurse(&iter, &dict_iter);
00200         while (dbus_message_iter_get_arg_type(&dict_iter) ==
00201                DBUS_TYPE_DICT_ENTRY) {
00202                 dbus_message_iter_recurse(&dict_iter, &entry_iter);
00203 
00204                 dbus_message_iter_get_basic(&entry_iter, &key);
00205                 dbus_message_iter_next(&entry_iter);
00206 
00207                 if (wpas_dbus_handler_wps_start_entry(message, key,
00208                                                       &entry_iter,
00209                                                       &params, &reply))
00210                         return reply;
00211 
00212                 dbus_message_iter_next(&dict_iter);
00213         }
00214 
00215         if (params.role == 0) {
00216                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Role not specified");
00217                 return wpas_dbus_error_invalid_args(message,
00218                                                     "Role not specified");
00219         } else if (params.role == 1 && params.type == 0) {
00220                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Type not specified");
00221                 return wpas_dbus_error_invalid_args(message,
00222                                                     "Type not specified");
00223         } else if (params.role == 2 && params.pin == NULL) {
00224                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start - Pin required for "
00225                            "registrar role");
00226                 return wpas_dbus_error_invalid_args(
00227                         message, "Pin required for registrar role.");
00228         }
00229 
00230         if (params.role == 2)
00231                 ret = wpas_wps_start_reg(wpa_s, params.bssid, params.pin,
00232                                          NULL);
00233         else if (params.type == 1) {
00234                 ret = wpas_wps_start_pin(wpa_s, params.bssid, params.pin);
00235                 if (ret > 0)
00236                         os_snprintf(npin, sizeof(npin), "%08d", ret);
00237         } else
00238                 ret = wpas_wps_start_pbc(wpa_s, params.bssid);
00239 
00240         if (ret < 0) {
00241                 wpa_printf(MSG_DEBUG, "dbus: WPS.Start wpas_wps_failed in "
00242                            "role %s and key %s",
00243                            (params.role == 1 ? "enrollee" : "registrar"),
00244                            (params.type == 0 ? "" :
00245                             (params.type == 1 ? "pin" : "pbc")));
00246                 return wpas_dbus_error_unknown_error(message,
00247                                                      "WPS start failed");
00248         }
00249 
00250         reply = dbus_message_new_method_return(message);
00251         if (!reply) {
00252                 return dbus_message_new_error(message, DBUS_ERROR_NO_MEMORY,
00253                                               NULL);
00254         }
00255 
00256         dbus_message_iter_init_append(reply, &iter);
00257         if (!wpa_dbus_dict_open_write(&iter, &dict_iter)) {
00258                 dbus_message_unref(reply);
00259                 return dbus_message_new_error(message, DBUS_ERROR_NO_MEMORY,
00260                                               NULL);
00261         }
00262 
00263         if (os_strlen(npin) > 0) {
00264                 if (!wpa_dbus_dict_append_string(&dict_iter, "Pin", npin)) {
00265                         dbus_message_unref(reply);
00266                         return dbus_message_new_error(message,
00267                                                       DBUS_ERROR_NO_MEMORY,
00268                                                       NULL);
00269                 }
00270         }
00271 
00272         if (!wpa_dbus_dict_close_write(&iter, &dict_iter)) {
00273                 dbus_message_unref(reply);
00274                 return dbus_message_new_error(message, DBUS_ERROR_NO_MEMORY,
00275                                               NULL);
00276         }
00277 
00278         return reply;
00279 }
00280 
00281 
00292 DBusMessage * wpas_dbus_getter_process_credentials(
00293         DBusMessage *message, struct wpa_supplicant *wpa_s)
00294 {
00295         dbus_bool_t process = (wpa_s->conf->wps_cred_processing != 1);
00296         return wpas_dbus_simple_property_getter(message, DBUS_TYPE_BOOLEAN,
00297                                                 &process);
00298 }
00299 
00300 
00310 DBusMessage * wpas_dbus_setter_process_credentials(
00311         DBusMessage *message, struct wpa_supplicant *wpa_s)
00312 {
00313         DBusMessage *reply = NULL;
00314         dbus_bool_t process_credentials, old_pc;
00315 
00316         reply = wpas_dbus_simple_property_setter(message, DBUS_TYPE_BOOLEAN,
00317                                                  &process_credentials);
00318         if (reply)
00319                 return reply;
00320 
00321         old_pc = (wpa_s->conf->wps_cred_processing != 1);
00322         wpa_s->conf->wps_cred_processing = (process_credentials ? 2 : 1);
00323 
00324         if ((wpa_s->conf->wps_cred_processing != 1) != old_pc)
00325                 wpa_dbus_mark_property_changed(wpa_s->global->dbus,
00326                                                wpa_s->dbus_new_path,
00327                                                WPAS_DBUS_NEW_IFACE_WPS,
00328                                                "ProcessCredentials");
00329 
00330         return NULL;
00331 }
dbus_new_handlers_wps.c
