MBO: Add support to send ANQP request to get cellular preference
[mech_eap.git] / wpa_supplicant / dbus / dbus_new_helpers.c
index cfa6a15..0115e32 100644 (file)
@@ -15,6 +15,7 @@
 #include "dbus_common_i.h"
 #include "dbus_new.h"
 #include "dbus_new_helpers.h"
+#include "dbus_new_handlers.h"
 #include "dbus_dict_helpers.h"
 
 
@@ -38,27 +39,30 @@ static dbus_bool_t fill_dict_with_properties(
 
                if (!dbus_message_iter_open_container(dict_iter,
                                                      DBUS_TYPE_DICT_ENTRY,
-                                                     NULL, &entry_iter)) {
-                       dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY,
-                                            "no memory");
-                       return FALSE;
-               }
-               if (!dbus_message_iter_append_basic(&entry_iter,
+                                                     NULL, &entry_iter) ||
+                   !dbus_message_iter_append_basic(&entry_iter,
                                                    DBUS_TYPE_STRING,
-                                                   &dsc->dbus_property)) {
-                       dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY,
-                                            "no memory");
-                       return FALSE;
-               }
+                                                   &dsc->dbus_property))
+                       goto error;
 
                /* An error getting a property fails the request entirely */
-               if (!dsc->getter(&entry_iter, error, user_data))
+               if (!dsc->getter(dsc, &entry_iter, error, user_data)) {
+                       wpa_printf(MSG_INFO,
+                                  "dbus: %s dbus_interface=%s dbus_property=%s getter failed",
+                                  __func__, dsc->dbus_interface,
+                                  dsc->dbus_property);
                        return FALSE;
+               }
 
-               dbus_message_iter_close_container(dict_iter, &entry_iter);
+               if (!dbus_message_iter_close_container(dict_iter, &entry_iter))
+                       goto error;
        }
 
        return TRUE;
+
+error:
+       dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, "no memory");
+       return FALSE;
 }
 
 
@@ -75,43 +79,38 @@ static dbus_bool_t fill_dict_with_properties(
  * with properties names as keys and theirs values as values.
  */
 static DBusMessage * get_all_properties(DBusMessage *message, char *interface,
-                                       struct wpa_dbus_object_desc *obj_dsc)
+                                       struct wpa_dbus_object_desc *obj_dsc)
 {
        DBusMessage *reply;
        DBusMessageIter iter, dict_iter;
        DBusError error;
 
        reply = dbus_message_new_method_return(message);
-       if (reply == NULL) {
-               wpa_printf(MSG_ERROR, "%s: out of memory creating dbus reply",
-                          __func__);
-               return NULL;
-       }
+       if (reply == NULL)
+               return wpas_dbus_error_no_memory(message);
 
        dbus_message_iter_init_append(reply, &iter);
        if (!wpa_dbus_dict_open_write(&iter, &dict_iter)) {
-               wpa_printf(MSG_ERROR, "%s: out of memory creating reply",
-                          __func__);
                dbus_message_unref(reply);
-               reply = dbus_message_new_error(message, DBUS_ERROR_NO_MEMORY,
-                                              "out of memory");
-               return reply;
+               return wpas_dbus_error_no_memory(message);
        }
 
        dbus_error_init(&error);
        if (!fill_dict_with_properties(&dict_iter, obj_dsc->properties,
-                                      interface, obj_dsc->user_data, &error))
-       {
+                                      interface, obj_dsc->user_data, &error)) {
                dbus_message_unref(reply);
-               reply = wpas_dbus_reply_new_from_error(message, &error,
-                                                      DBUS_ERROR_INVALID_ARGS,
-                                                      "No readable properties"
-                                                      " in this interface");
+               reply = wpas_dbus_reply_new_from_error(
+                       message, &error, DBUS_ERROR_INVALID_ARGS,
+                       "No readable properties in this interface");
                dbus_error_free(&error);
                return reply;
        }
 
-       wpa_dbus_dict_close_write(&iter, &dict_iter);
+       if (!wpa_dbus_dict_close_write(&iter, &dict_iter)) {
+               dbus_message_unref(reply);
+               return wpas_dbus_error_no_memory(message);
+       }
+
        return reply;
 }
 
@@ -132,8 +131,9 @@ static int is_signature_correct(DBusMessage *message,
        for (arg = method_dsc->args; arg && arg->name; arg++) {
                if (arg->dir == ARG_IN) {
                        size_t blen = registered_sig + MAX_SIG_LEN - pos;
+
                        ret = os_snprintf(pos, blen, "%s", arg->type);
-                       if (ret < 0 || (size_t) ret >= blen)
+                       if (os_snprintf_error(blen, ret))
                                return 0;
                        pos += ret;
                }
@@ -176,7 +176,7 @@ static DBusMessage * properties_get(DBusMessage *message,
        dbus_message_iter_init_append(reply, &iter);
 
        dbus_error_init(&error);
-       if (dsc->getter(&iter, &error, user_data) == FALSE) {
+       if (dsc->getter(dsc, &iter, &error, user_data) == FALSE) {
                dbus_message_unref(reply);
                reply = wpas_dbus_reply_new_from_error(
                        message, &error, DBUS_ERROR_FAILED,
@@ -213,7 +213,7 @@ static DBusMessage * properties_set(DBusMessage *message,
 
        /* Iter will now point to the property's new value */
        dbus_error_init(&error);
-       if (dsc->setter(&iter, &error, user_data) == TRUE) {
+       if (dsc->setter(dsc, &iter, &error, user_data) == TRUE) {
                /* Success */
                reply = dbus_message_new_method_return(message);
        } else {
@@ -267,10 +267,13 @@ properties_get_or_set(DBusMessage *message, DBusMessageIter *iter,
        }
 
        if (os_strncmp(WPA_DBUS_PROPERTIES_GET, method,
-                      WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) == 0)
+                      WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) == 0) {
+               wpa_printf(MSG_MSGDUMP, "%s: Get(%s)", __func__, property);
                return properties_get(message, property_dsc,
                                      obj_dsc->user_data);
+       }
 
+       wpa_printf(MSG_MSGDUMP, "%s: Set(%s)", __func__, property);
        return properties_set(message, property_dsc, obj_dsc->user_data);
 }
 
@@ -292,8 +295,7 @@ static DBusMessage * properties_handler(DBusMessage *message,
            !os_strncmp(WPA_DBUS_PROPERTIES_GETALL, method,
                        WPAS_DBUS_METHOD_SIGNAL_PROP_MAX)) {
                /* First argument: interface name (DBUS_TYPE_STRING) */
-               if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
-               {
+               if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) {
                        return dbus_message_new_error(message,
                                                      DBUS_ERROR_INVALID_ARGS,
                                                      NULL);
@@ -349,8 +351,7 @@ static DBusMessage * msg_method_handler(DBusMessage *message,
                                              NULL);
        }
 
-       return method_dsc->method_handler(message,
-                                         obj_dsc->user_data);
+       return method_dsc->method_handler(message, obj_dsc->user_data);
 }
 
 
@@ -385,8 +386,9 @@ static DBusHandlerResult message_handler(DBusConnection *connection,
        if (!method || !path || !msg_interface)
                return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 
-       wpa_printf(MSG_MSGDUMP, "dbus: %s.%s (%s)",
-                  msg_interface, method, path);
+       wpa_printf(MSG_MSGDUMP, "dbus: %s.%s (%s) [%s]",
+                  msg_interface, method, path,
+                  dbus_message_get_signature(message));
 
        /* if message is introspection method call */
        if (!os_strncmp(WPA_DBUS_INTROSPECTION_METHOD, method,
@@ -398,8 +400,7 @@ static DBusHandlerResult message_handler(DBusConnection *connection,
 #else /* CONFIG_CTRL_IFACE_DBUS_INTRO */
                reply = dbus_message_new_error(
                        message, DBUS_ERROR_UNKNOWN_METHOD,
-                       "wpa_supplicant was compiled without "
-                       "introspection support.");
+                       "wpa_supplicant was compiled without introspection support.");
 #endif /* CONFIG_CTRL_IFACE_DBUS_INTRO */
        } else if (!os_strncmp(WPA_DBUS_PROPERTIES_INTERFACE, msg_interface,
                             WPAS_DBUS_INTERFACE_MAX)) {
@@ -452,6 +453,7 @@ static void free_dbus_object_desc_cb(DBusConnection *connection, void *obj_dsc)
        free_dbus_object_desc(obj_dsc);
 }
 
+
 /**
  * wpa_dbus_ctrl_iface_init - Initialize dbus control interface
  * @application_data: Pointer to application specific data structure
@@ -479,30 +481,28 @@ int wpa_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface,
        obj_desc->path = os_strdup(dbus_path);
 
        /* Register the message handler for the global dbus interface */
-       if (!dbus_connection_register_object_path(iface->con,
-                                                 dbus_path, &wpa_vtable,
-                                                 obj_desc)) {
-               wpa_printf(MSG_ERROR, "dbus: Could not set up message "
-                          "handler");
+       if (!dbus_connection_register_object_path(iface->con, dbus_path,
+                                                 &wpa_vtable, obj_desc)) {
+               wpa_printf(MSG_ERROR, "dbus: Could not set up message handler");
                return -1;
        }
 
        /* Register our service with the message bus */
        dbus_error_init(&error);
-       switch (dbus_bus_request_name(iface->con, dbus_service,
-                                     0, &error)) {
+       switch (dbus_bus_request_name(iface->con, dbus_service, 0, &error)) {
        case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
                ret = 0;
                break;
        case DBUS_REQUEST_NAME_REPLY_EXISTS:
        case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
        case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
-               wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
-                          "already registered");
+               wpa_printf(MSG_ERROR,
+                          "dbus: Could not request service name: already registered");
                break;
        default:
-               wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
-                          "%s %s", error.name, error.message);
+               wpa_printf(MSG_ERROR,
+                          "dbus: Could not request service name: %s %s",
+                          error.name, error.message);
                break;
        }
        dbus_error_free(&error);
@@ -526,14 +526,12 @@ int wpa_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface,
  *
  * Registers a new interface with dbus and assigns it a dbus object path.
  */
-int wpa_dbus_register_object_per_iface(
-       struct wpas_dbus_priv *ctrl_iface,
-       const char *path, const char *ifname,
-       struct wpa_dbus_object_desc *obj_desc)
+int wpa_dbus_register_object_per_iface(struct wpas_dbus_priv *ctrl_iface,
+                                      const char *path, const char *ifname,
+                                      struct wpa_dbus_object_desc *obj_desc)
 {
        DBusConnection *con;
        DBusError error;
-
        DBusObjectPathVTable vtable = {
                &free_dbus_object_desc_cb, &message_handler,
                NULL, NULL, NULL, NULL
@@ -551,14 +549,12 @@ int wpa_dbus_register_object_per_iface(
        /* Register the message handler for the interface functions */
        if (!dbus_connection_try_register_object_path(con, path, &vtable,
                                                      obj_desc, &error)) {
-               if (!os_strcmp(error.name, DBUS_ERROR_OBJECT_PATH_IN_USE)) {
+               if (os_strcmp(error.name, DBUS_ERROR_OBJECT_PATH_IN_USE) == 0) {
                        wpa_printf(MSG_DEBUG, "dbus: %s", error.message);
                } else {
-                       wpa_printf(MSG_ERROR, "dbus: Could not set up message "
-                                  "handler for interface %s object %s",
-                                  ifname, path);
-                       wpa_printf(MSG_ERROR, "dbus error: %s", error.name);
-                       wpa_printf(MSG_ERROR, "dbus: %s", error.message);
+                       wpa_printf(MSG_ERROR,
+                                  "dbus: Could not set up message handler for interface %s object %s (error: %s message: %s)",
+                                  ifname, path, error.name, error.message);
                }
                dbus_error_free(&error);
                return -1;
@@ -588,13 +584,14 @@ int wpa_dbus_unregister_object_per_iface(
 
        dbus_connection_get_object_path_data(con, path, (void **) &obj_desc);
        if (!obj_desc) {
-               wpa_printf(MSG_ERROR, "dbus: %s: Could not obtain object's "
-                          "private data: %s", __func__, path);
-       } else {
-               eloop_cancel_timeout(flush_object_timeout_handler, con,
-                                    obj_desc);
+               wpa_printf(MSG_ERROR,
+                          "dbus: %s: Could not obtain object's private data: %s",
+                          __func__, path);
+               return 0;
        }
 
+       eloop_cancel_timeout(flush_object_timeout_handler, con, obj_desc);
+
        if (!dbus_connection_unregister_object_path(con, path))
                return -1;
 
@@ -623,24 +620,23 @@ static dbus_bool_t put_changed_properties(
 
                if (!dbus_message_iter_open_container(dict_iter,
                                                      DBUS_TYPE_DICT_ENTRY,
-                                                     NULL, &entry_iter))
-                       return FALSE;
-
-               if (!dbus_message_iter_append_basic(&entry_iter,
+                                                     NULL, &entry_iter) ||
+                   !dbus_message_iter_append_basic(&entry_iter,
                                                    DBUS_TYPE_STRING,
                                                    &dsc->dbus_property))
                        return FALSE;
 
                dbus_error_init(&error);
-               if (!dsc->getter(&entry_iter, &error, obj_dsc->user_data)) {
-                       if (dbus_error_is_set (&error)) {
-                               wpa_printf(MSG_ERROR, "dbus: %s: Cannot get "
-                                          "new value of property %s: (%s) %s",
-                                          __func__, dsc->dbus_property,
-                                          error.name, error.message);
+               if (!dsc->getter(dsc, &entry_iter, &error, obj_dsc->user_data))
+               {
+                       if (dbus_error_is_set(&error)) {
+                               wpa_printf(MSG_ERROR,
+                                          "dbus: %s: Cannot get new value of property %s: (%s) %s",
+                                          __func__, dsc->dbus_property,
+                                          error.name, error.message);
                        } else {
-                               wpa_printf(MSG_ERROR, "dbus: %s: Cannot get "
-                                          "new value of property %s",
+                               wpa_printf(MSG_ERROR,
+                                          "dbus: %s: Cannot get new value of property %s",
                                           __func__, dsc->dbus_property);
                        }
                        dbus_error_free(&error);
@@ -670,38 +666,23 @@ static void do_send_prop_changed_signal(
        dbus_message_iter_init_append(msg, &signal_iter);
 
        if (!dbus_message_iter_append_basic(&signal_iter, DBUS_TYPE_STRING,
-                                           &interface))
-               goto err;
-
-       /* Changed properties dict */
-       if (!dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
-                                             "{sv}", &dict_iter))
-               goto err;
-
-       if (!put_changed_properties(obj_dsc, interface, &dict_iter, 0))
-               goto err;
-
-       if (!dbus_message_iter_close_container(&signal_iter, &dict_iter))
-               goto err;
-
-       /* Invalidated properties array (empty) */
-       if (!dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
-                                             "s", &dict_iter))
-               goto err;
-
-       if (!dbus_message_iter_close_container(&signal_iter, &dict_iter))
-               goto err;
-
-       dbus_connection_send(con, msg, NULL);
+                                           &interface) ||
+           /* Changed properties dict */
+           !dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
+                                             "{sv}", &dict_iter) ||
+           !put_changed_properties(obj_dsc, interface, &dict_iter, 0) ||
+           !dbus_message_iter_close_container(&signal_iter, &dict_iter) ||
+           /* Invalidated properties array (empty) */
+           !dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
+                                             "s", &dict_iter) ||
+           !dbus_message_iter_close_container(&signal_iter, &dict_iter)) {
+               wpa_printf(MSG_DEBUG, "dbus: %s: Failed to construct signal",
+                          __func__);
+       } else {
+               dbus_connection_send(con, msg, NULL);
+       }
 
-out:
        dbus_message_unref(msg);
-       return;
-
-err:
-       wpa_printf(MSG_DEBUG, "dbus: %s: Failed to construct signal",
-                  __func__);
-       goto out;
 }
 
 
@@ -719,25 +700,16 @@ static void do_send_deprecated_prop_changed_signal(
        dbus_message_iter_init_append(msg, &signal_iter);
 
        if (!dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
-                                             "{sv}", &dict_iter))
-               goto err;
-
-       if (!put_changed_properties(obj_dsc, interface, &dict_iter, 1))
-               goto err;
-
-       if (!dbus_message_iter_close_container(&signal_iter, &dict_iter))
-               goto err;
-
-       dbus_connection_send(con, msg, NULL);
+                                             "{sv}", &dict_iter) ||
+           !put_changed_properties(obj_dsc, interface, &dict_iter, 1) ||
+           !dbus_message_iter_close_container(&signal_iter, &dict_iter)) {
+               wpa_printf(MSG_DEBUG, "dbus: %s: Failed to construct signal",
+                          __func__);
+       } else {
+               dbus_connection_send(con, msg, NULL);
+       }
 
-out:
        dbus_message_unref(msg);
-       return;
-
-err:
-       wpa_printf(MSG_DEBUG, "dbus: %s: Failed to construct signal",
-                  __func__);
-       goto out;
 }
 
 
@@ -769,8 +741,9 @@ static void flush_object_timeout_handler(void *eloop_ctx, void *timeout_ctx)
        DBusConnection *con = eloop_ctx;
        struct wpa_dbus_object_desc *obj_desc = timeout_ctx;
 
-       wpa_printf(MSG_DEBUG, "dbus: %s: Timeout - sending changed properties "
-                  "of object %s", __func__, obj_desc->path);
+       wpa_printf(MSG_DEBUG,
+                  "dbus: %s: Timeout - sending changed properties of object %s",
+                  __func__, obj_desc->path);
        wpa_dbus_flush_object_changed_properties(con, obj_desc->path);
 }
 
@@ -840,7 +813,6 @@ void wpa_dbus_flush_object_changed_properties(DBusConnection *con,
                return;
        eloop_cancel_timeout(flush_object_timeout_handler, con, obj_desc);
 
-       dsc = obj_desc->properties;
        for (dsc = obj_desc->properties, i = 0; dsc && dsc->dbus_property;
             dsc++, i++) {
                if (obj_desc->prop_changed_flags == NULL ||
@@ -882,8 +854,9 @@ void wpa_dbus_mark_property_changed(struct wpas_dbus_priv *iface,
        dbus_connection_get_object_path_data(iface->con, path,
                                             (void **) &obj_desc);
        if (!obj_desc) {
-               wpa_printf(MSG_ERROR, "dbus: wpa_dbus_property_changed: "
-                          "could not obtain object's private data: %s", path);
+               wpa_printf(MSG_ERROR,
+                          "dbus: wpa_dbus_property_changed: could not obtain object's private data: %s",
+                          path);
                return;
        }
 
@@ -896,13 +869,14 @@ void wpa_dbus_mark_property_changed(struct wpas_dbus_priv *iface,
                }
 
        if (!dsc || !dsc->dbus_property) {
-               wpa_printf(MSG_ERROR, "dbus: wpa_dbus_property_changed: "
-                          "no property %s in object %s", property, path);
+               wpa_printf(MSG_ERROR,
+                          "dbus: wpa_dbus_property_changed: no property %s in object %s",
+                          property, path);
                return;
        }
 
        if (!eloop_is_timeout_registered(flush_object_timeout_handler,
-                                        iface->con, obj_desc->path)) {
+                                        iface->con, obj_desc)) {
                eloop_register_timeout(0, WPA_DBUS_SEND_PROP_CHANGED_TIMEOUT,
                                       flush_object_timeout_handler,
                                       iface->con, obj_desc);
@@ -934,8 +908,9 @@ dbus_bool_t wpa_dbus_get_object_properties(struct wpas_dbus_priv *iface,
        dbus_connection_get_object_path_data(iface->con, path,
                                             (void **) &obj_desc);
        if (!obj_desc) {
-               wpa_printf(MSG_ERROR, "dbus: %s: could not obtain object's "
-                          "private data: %s", __func__, path);
+               wpa_printf(MSG_ERROR,
+                          "dbus: %s: could not obtain object's private data: %s",
+                          __func__, path);
                return FALSE;
        }
 
@@ -949,10 +924,11 @@ dbus_bool_t wpa_dbus_get_object_properties(struct wpas_dbus_priv *iface,
        if (!fill_dict_with_properties(&dict_iter, obj_desc->properties,
                                       interface, obj_desc->user_data,
                                       &error)) {
-               wpa_printf(MSG_ERROR, "dbus: %s: failed to get object"
-                          " properties: (%s) %s", __func__,
-                          dbus_error_is_set(&error) ? error.name : "none",
-                          dbus_error_is_set(&error) ? error.message : "none");
+               wpa_printf(MSG_ERROR,
+                          "dbus: %s: failed to get object properties: (%s) %s",
+                          __func__,
+                          dbus_error_is_set(&error) ? error.name : "none",
+                          dbus_error_is_set(&error) ? error.message : "none");
                dbus_error_free(&error);
                return FALSE;
        }
@@ -963,29 +939,34 @@ dbus_bool_t wpa_dbus_get_object_properties(struct wpas_dbus_priv *iface,
 /**
  * wpas_dbus_new_decompose_object_path - Decompose an interface object path into parts
  * @path: The dbus object path
- * @p2p_persistent_group: indicates whether to parse the path as a P2P
- *                        persistent group object
- * @network: (out) the configured network this object path refers to, if any
- * @bssid: (out) the scanned bssid this object path refers to, if any
- * Returns: The object path of the network interface this path refers to
+ * @sep: Separating part (e.g., "Networks" or "PersistentGroups")
+ * @item: (out) The part following the specified separator, if any
+ * Returns: The object path of the interface this path refers to
+ *
+ * For a given object path, decomposes the object path into object id and
+ * requested part, if those parts exist. The caller is responsible for freeing
+ * the returned value. The *item pointer points to that allocated value and must
+ * not be freed separately.
  *
- * For a given object path, decomposes the object path into object id, network,
- * and BSSID parts, if those parts exist.
+ * As an example, path = "/fi/w1/wpa_supplicant1/Interfaces/1/Networks/0" and
+ * sep = "Networks" would result in "/fi/w1/wpa_supplicant1/Interfaces/1"
+ * getting returned and *items set to point to "0".
  */
-char *wpas_dbus_new_decompose_object_path(const char *path,
-                                          int p2p_persistent_group,
-                                          char **network,
-                                          char **bssid)
+char * wpas_dbus_new_decompose_object_path(const char *path, const char *sep,
+                                          char **item)
 {
        const unsigned int dev_path_prefix_len =
                os_strlen(WPAS_DBUS_NEW_PATH_INTERFACES "/");
        char *obj_path_only;
-       char *next_sep;
+       char *pos;
+       size_t sep_len;
 
-       /* Be a bit paranoid about path */
-       if (!path || os_strncmp(path, WPAS_DBUS_NEW_PATH_INTERFACES "/",
-                               dev_path_prefix_len))
-               return NULL;
+       *item = NULL;
+
+       /* Verify that this starts with our interface prefix */
+       if (os_strncmp(path, WPAS_DBUS_NEW_PATH_INTERFACES "/",
+                      dev_path_prefix_len) != 0)
+               return NULL; /* not our path */
 
        /* Ensure there's something at the end of the path */
        if ((path + dev_path_prefix_len)[0] == '\0')
@@ -995,39 +976,20 @@ char *wpas_dbus_new_decompose_object_path(const char *path,
        if (obj_path_only == NULL)
                return NULL;
 
-       next_sep = os_strchr(obj_path_only + dev_path_prefix_len, '/');
-       if (next_sep != NULL) {
-               const char *net_part = os_strstr(
-                       next_sep, p2p_persistent_group ?
-                       WPAS_DBUS_NEW_PERSISTENT_GROUPS_PART "/" :
-                       WPAS_DBUS_NEW_NETWORKS_PART "/");
-               const char *bssid_part = os_strstr(
-                       next_sep, WPAS_DBUS_NEW_BSSIDS_PART "/");
-
-               if (network && net_part) {
-                       /* Deal with a request for a configured network */
-                       const char *net_name = net_part +
-                               os_strlen(p2p_persistent_group ?
-                                         WPAS_DBUS_NEW_PERSISTENT_GROUPS_PART
-                                         "/" :
-                                         WPAS_DBUS_NEW_NETWORKS_PART "/");
-                       *network = NULL;
-                       if (os_strlen(net_name))
-                               *network = os_strdup(net_name);
-               } else if (bssid && bssid_part) {
-                       /* Deal with a request for a scanned BSSID */
-                       const char *bssid_name = bssid_part +
-                               os_strlen(WPAS_DBUS_NEW_BSSIDS_PART "/");
-                       if (os_strlen(bssid_name))
-                               *bssid = os_strdup(bssid_name);
-                       else
-                               *bssid = NULL;
-               }
+       pos = obj_path_only + dev_path_prefix_len;
+       pos = os_strchr(pos, '/');
+       if (pos == NULL)
+               return obj_path_only; /* no next item on the path */
 
-               /* Cut off interface object path before "/" */
-               *next_sep = '\0';
-       }
+        /* Separate network interface prefix from the path */
+       *pos++ = '\0';
+
+       sep_len = os_strlen(sep);
+       if (os_strncmp(pos, sep, sep_len) != 0 || pos[sep_len] != '/')
+               return obj_path_only; /* no match */
 
+        /* return a pointer to the requested item */
+       *item = pos + sep_len + 1;
        return obj_path_only;
 }