Initial package importHEADsubmit/tizen/20140519.123501master

4 files changed, 1601 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..ee79084
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,17 @@
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+    -I$(top_srcdir)/src \
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+    $(NULL)
+
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+    $(NULL)
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 0000000..76a549f
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,666 @@
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+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
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+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
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+
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+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
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+all-am: Makefile $(LTLIBRARIES)
+installdirs:
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+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
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+	      install; \
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
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+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/gtlm-nfc.c b/src/gtlm-nfc.c
new file mode 100644
index 0000000..c1a20e5
--- /dev/null
+++ b/src/gtlm-nfc.c
@@ -0,0 +1,846 @@
+/* vi: set et sw=4 ts=4 cino=t0,(0: */
+/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of gtlm-nfc
+ *
+ * Copyright (C) 2013 Intel Corporation.
+ *
+ * Contact: Alexander Kanavin <alex.kanavin@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include "gtlm-nfc.h"
+#include <gio/gio.h>
+
+GQuark
+gtlm_nfc_error_quark (void)
+{
+    return g_quark_from_static_string ("gtlm-nfc");
+}
+
+#define GTLM_NFC_ERROR   (gtlm_nfc_error_quark())
+
+/**
+ * SECTION:gtlm-nfc
+ * @short_description: a helper object that provides NFC functionality to user management code
+ * @include: gtlm-nfc.h
+ *
+ * #GTlmNfc is used by Tizen user and login management to access NFC tags
+ * and authenticate users through them. It provides signals to listen for tags
+ * appearing and disappearing, and for reading and writing username/password pairs 
+ * to tags.
+ */
+/**
+ * GTlmNfcError:
+ * @GTLM_NFC_ERROR_NONE: No error
+ * @GTLM_NFC_ERROR_NO_TAG: Issued when attempting to write to an absent tag
+ * 
+ * This enum provides a list of errors that libtlm-nfc returns.
+ * 
+ */
+
+/**
+ * GTlmNfc:
+ *
+ * Opaque #GTlmNfc data structure.
+ */
+/**
+ * GTlmNfcClass:
+ * @parent_class: the parent class structure
+ *
+ * Opaque #GTlmNfcClass data structure.
+ */
+
+G_DEFINE_TYPE_WITH_CODE (GTlmNfc, gtlm_nfc, 
+                         G_TYPE_OBJECT,
+                         );
+
+enum
+{
+    PROP_0
+    
+};
+
+enum {
+    SIG_TAG_FOUND,
+    SIG_TAG_LOST,
+    SIG_RECORD_FOUND,
+    SIG_NO_RECORD_FOUND,
+ 
+    SIG_MAX
+};
+
+static guint signals[SIG_MAX];
+
+
+static gchar* _encode_username_password(const gchar* username, const gchar* password)
+{
+    GVariant* v = g_variant_new("(msms)", username, password);
+    
+    gchar* out = g_base64_encode(g_variant_get_data(v), g_variant_get_size(v));
+    g_variant_unref(v);
+    return out;
+}
+
+/**
+ * gtlm_nfc_write_username_password:
+ * @tlm_nfc: an instance of GTlmNfc object
+ * @nfc_tag_path: an identificator of the nfc tag (returned by #GTlmNfc::tag-found)
+ * @username: username to write
+ * @password: password to write
+ * @error: if non-NULL, set to an error, if one occurs
+ * 
+ * This function is used to write a username and password to a tag. The tag path
+ * can be obtained by listening to #GTlmNfc::tag-found signals). @error is set to
+ * @GTLM_NFC_ERROR_NO_TAG if no such tag exists.
+ */
+void gtlm_nfc_write_username_password(GTlmNfc* tlm_nfc,
+                                      const gchar* nfc_tag_path,
+                                      const gchar* username, 
+                                      const gchar* password,
+                                      GError** error)
+{
+    if (nfc_tag_path == NULL) {
+        *error = g_error_new(GTLM_NFC_ERROR, GTLM_NFC_ERROR_NO_TAG, "No tag is present");
+        return;
+    }
+    
+    GDBusProxy* tag = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
+                                         G_DBUS_PROXY_FLAGS_NONE,
+                                         NULL, /* GDBusInterfaceInfo */
+                                         "org.neard",
+                                         nfc_tag_path,
+                                         "org.neard.Tag",
+                                         NULL, /* GCancellable */
+                                         error);
+    if (tag == NULL) {
+        g_debug ("Error creating tag proxy: %s", (*error)->message);
+        return;
+    }    
+
+    //gchar binary_data[] = {0x41, 0x42, 0x43, 0x44};
+    gchar* binary_data = _encode_username_password(username, password);
+    GVariant* payload =  g_variant_new_bytestring(binary_data);
+    g_free(binary_data);
+    
+    GVariant* arguments = g_variant_new_parsed ("({'Type': <'MIME'>, 'MIME': <'application/gtlm-nfc'>, 'Payload' : %v },)", payload);
+    
+    GVariant *result = g_dbus_proxy_call_sync (tag,
+                                        "Write",
+                                        arguments,
+                                        G_DBUS_CALL_FLAGS_NONE,
+                                        -1,
+                                        NULL,
+                                        error);
+    
+   if (result == NULL) {
+        g_debug ("Error writing to tag: %s", (*error)->message);
+        g_object_unref(tag);
+        return;
+    }    
+
+    g_variant_unref(result);
+    g_object_unref(tag);
+}
+
+static void _decode_username_password(GTlmNfc* self, const gchar* data)
+{
+    gsize variant_s_size = 0;
+    guchar* variant_s = g_base64_decode(data, &variant_s_size);
+    
+    GVariantType* v_t = g_variant_type_new("(msms)");
+    GVariant* v = g_variant_new_from_data(v_t, variant_s, variant_s_size, FALSE, NULL, NULL);
+    
+    if (v == NULL) {
+        g_debug("Couldn't decode Payload data to variant");
+        g_variant_type_free(v_t);
+        g_free(variant_s);
+        g_signal_emit(self, signals[SIG_NO_RECORD_FOUND], 0);
+        return;
+    }
+    
+    gchar* username = NULL;
+    gchar* password = NULL;
+    g_variant_get(v, "(msms)", &username, &password);
+    
+    g_signal_emit(self, signals[SIG_RECORD_FOUND], 0, username, password);
+    
+    g_free(username);
+    g_free(password);
+    g_variant_unref(v);
+    g_variant_type_free(v_t);
+    g_free(variant_s);
+}
+
+static void
+_handle_agent_method_call (GDBusConnection       *connection,
+                    const gchar           *sender,
+                    const gchar           *object_path,
+                    const gchar           *interface_name,
+                    const gchar           *method_name,
+                    GVariant              *parameters,
+                    GDBusMethodInvocation *invocation,
+                    gpointer               user_data)
+{
+    GTlmNfc* self = GTLM_NFC(user_data);
+    gchar *parameters_str;
+
+    parameters_str = g_variant_print (parameters, TRUE);
+    g_debug ("Agent received method call: %s\n\tParameters: %s\n\tSender: %s\n\tObject path: %s\n\tInteface name: %s",
+           method_name, parameters_str, sender, object_path, interface_name);
+    g_free (parameters_str);
+    
+    if (g_strcmp0(method_name, "GetNDEF") != 0) {
+        goto out;
+    }
+
+    GVariant* parameters_dict = g_variant_get_child_value(parameters, 0);
+    if (parameters_dict == NULL)
+    {
+        g_debug ("Error getting parameters dict");
+        g_signal_emit(self, signals[SIG_NO_RECORD_FOUND], 0);
+        goto out;
+    }
+
+    gchar* payload_data;
+    
+    if (g_variant_lookup(parameters_dict, "Payload", "^ay", &payload_data) == FALSE) {
+        g_debug ("Error getting raw Payload data");
+        g_signal_emit(self, signals[SIG_NO_RECORD_FOUND], 0);        
+        g_variant_unref(parameters_dict);
+        goto out;
+    }
+    g_variant_unref(parameters_dict);
+    
+    _decode_username_password(self, payload_data);
+    g_free(payload_data);
+    
+out:    
+    g_dbus_method_invocation_return_value (invocation, NULL);
+}
+
+static GVariant *
+_handle_agent_get_property (GDBusConnection  *connection,
+                     const gchar      *sender,
+                     const gchar      *object_path,
+                     const gchar      *interface_name,
+                     const gchar      *property_name,
+                     GError          **error,
+                     gpointer          user_data)
+{
+    return NULL;
+}
+
+static gboolean
+_handle_agent_set_property (GDBusConnection  *connection,
+                     const gchar      *sender,
+                     const gchar      *object_path,
+                     const gchar      *interface_name,
+                     const gchar      *property_name,
+                     GVariant         *value,
+                     GError          **error,
+                     gpointer          user_data)
+{
+    return FALSE;
+}
+
+static void
+_setup_nfc_adapter(GTlmNfc *self, GDBusProxy *nfc_adapter)
+{
+    GError* error = NULL;
+    gboolean powered;
+    gboolean polling;
+
+    // for some reason the cached properties aren't updated, so we request them directly
+    //GVariant* powered_v = g_dbus_proxy_get_cached_property(nfc_adapter, "Powered");
+    GVariant* powered_resp = g_dbus_connection_call_sync (self->system_bus,
+                                        "org.neard",
+                                        g_dbus_proxy_get_object_path(nfc_adapter) ,
+                                        "org.freedesktop.DBus.Properties",
+                                        "Get",
+                                        g_variant_new("(ss)", 
+                                                      g_dbus_proxy_get_interface_name(nfc_adapter), 
+                                                      "Powered"
+                                                     ),
+                                        NULL,              
+                                        G_DBUS_CALL_FLAGS_NONE,
+                                        -1,
+                                        NULL,
+                                        &error);
+    
+    if (powered_resp == NULL) {
+        g_debug("Powered property is absent on an adapter: %s", error->message);
+        g_error_free (error);
+        return;
+    }
+    
+    GVariant* powered_v;
+    g_variant_get_child(powered_resp, 0, "v", &powered_v);
+    
+    if (powered_v == NULL || !g_variant_is_of_type(powered_v, G_VARIANT_TYPE_BOOLEAN)) {
+        g_debug("Error retrieving powered property");
+        return;
+    }
+    
+    powered = g_variant_get_boolean(powered_v);
+    g_variant_unref(powered_resp);
+    
+    //GVariant* polling_v = g_dbus_proxy_get_cached_property(nfc_adapter, "Polling");
+    GVariant* polling_resp = g_dbus_connection_call_sync (self->system_bus,
+                                        "org.neard",
+                                        g_dbus_proxy_get_object_path(nfc_adapter) ,
+                                        "org.freedesktop.DBus.Properties",
+                                        "Get",
+                                        g_variant_new("(ss)", 
+                                                      g_dbus_proxy_get_interface_name(nfc_adapter), 
+                                                      "Polling"
+                                                     ),
+                                        NULL,              
+                                        G_DBUS_CALL_FLAGS_NONE,
+                                        -1,
+                                        NULL,
+                                        &error);
+    if (polling_resp == NULL) {
+        g_debug("Polling property is absent on an adapter: %s", error->message);
+        g_error_free (error);
+        return;
+    }
+    
+    GVariant* polling_v;
+    g_variant_get_child(polling_resp, 0, "v", &polling_v);
+    
+    if (polling_v == NULL || !g_variant_is_of_type(polling_v, G_VARIANT_TYPE_BOOLEAN)) {
+        g_debug("Error retrieving polling property");
+        return;
+    }
+    
+    polling = g_variant_get_boolean(polling_v);
+    g_variant_unref(polling_resp);
+    
+    
+    GVariant* response;
+    if (powered == FALSE) {
+        // switch power on
+
+        response = g_dbus_connection_call_sync (self->system_bus,
+                                        "org.neard",
+                                        g_dbus_proxy_get_object_path(nfc_adapter) ,
+                                        "org.freedesktop.DBus.Properties",
+                                        "Set",
+                                        g_variant_new("(ssv)", 
+                                                      g_dbus_proxy_get_interface_name(nfc_adapter), 
+                                                      "Powered",
+                                                      g_variant_new_boolean(TRUE)
+                                                     ),
+                                        NULL,              
+                                        G_DBUS_CALL_FLAGS_NONE,
+                                        -1,
+                                        NULL,
+                                        &error);
+        
+        if (response == NULL ) {
+            g_debug("Error swithing NFC adapter on: %s", error->message);
+            g_error_free (error);
+            return;
+        }
+        g_variant_unref(response);
+        g_debug("Switched NFC adapter on");
+    } else
+        g_debug("Adapter already switched on");
+
+    if (polling == FALSE) {
+        // start polling
+        response = g_dbus_proxy_call_sync (nfc_adapter,
+                                        "StartPollLoop",
+                                        g_variant_new("(s)", "Initiator"),
+                                        G_DBUS_CALL_FLAGS_NONE,
+                                        -1,
+                                        NULL,
+                                        &error);
+        if (response == NULL)
+        {
+            g_debug("Error starting NFC poll loop: %s", error->message);
+            g_error_free (error);
+            return;
+        }
+        g_variant_unref(response);
+        g_debug("Started NFC poll loop");
+
+    } else
+        g_debug("Adapter already in polling mode");
+
+
+}
+
+
+void _on_interface_added(GDBusObjectManager *manager,
+                         GDBusObject        *object,
+                         GDBusInterface     *interface,
+                         gpointer            user_data)
+{
+    GTlmNfc* self = GTLM_NFC(user_data);
+    GDBusProxy* proxy = G_DBUS_PROXY(interface);
+    g_debug("Object %s added interface %s", 
+                    g_dbus_object_get_object_path (object),
+                    g_dbus_proxy_get_interface_name (proxy));
+    
+    if (g_strcmp0(g_dbus_proxy_get_interface_name (proxy),
+                "org.neard.Adapter") == 0) {
+        _setup_nfc_adapter(self, proxy);
+        return;
+    }
+    if (g_strcmp0(g_dbus_proxy_get_interface_name (proxy),
+                "org.neard.Tag") == 0) {
+        g_signal_emit(self, signals[SIG_TAG_FOUND], 0, g_dbus_object_get_object_path (object));
+        return;
+    }
+
+    if (g_strcmp0(g_dbus_proxy_get_interface_name (proxy),
+                "org.neard.Record") == 0) {
+        GVariant* type_v = g_dbus_proxy_get_cached_property(proxy, "Type");
+        if (type_v == NULL || !g_variant_is_of_type(type_v, G_VARIANT_TYPE_STRING)) {
+            g_debug("Type property is absent on a record");
+            g_signal_emit(self, signals[SIG_NO_RECORD_FOUND], 0);
+            return;
+        }
+        const gchar* type = g_variant_get_string(type_v, NULL);
+        g_debug("Record has type %s", type);
+        if (g_strcmp0(type, "MIME") != 0) {
+            g_variant_unref(type_v);
+            g_signal_emit(self, signals[SIG_NO_RECORD_FOUND], 0);
+            return;
+        }
+        g_variant_unref(type_v);
+
+        GVariant* mimetype_v = g_dbus_proxy_get_cached_property(proxy, "MIME");
+        if (mimetype_v == NULL || !g_variant_is_of_type(type_v, G_VARIANT_TYPE_STRING)) {
+            g_debug("MIME property is absent on a record");
+            g_signal_emit(self, signals[SIG_NO_RECORD_FOUND], 0);
+            return;
+        }
+        const gchar* mimetype = g_variant_get_string(mimetype_v, NULL);
+        g_debug("Record has MIME type %s", mimetype);
+        if (g_strcmp0(mimetype, "application/gtlm-nfc") != 0) {
+            g_variant_unref(mimetype_v);
+            g_signal_emit(self, signals[SIG_NO_RECORD_FOUND], 0);
+            return;
+        }
+        g_variant_unref(mimetype_v);
+    }
+}
+
+static void
+_setup_nfc_adapters(GTlmNfc *self)
+{
+    GList* objects = g_dbus_object_manager_get_objects(self->neard_manager);
+    GList* objects_iter = objects;
+    
+    while (objects_iter != NULL) {
+        GList* interfaces = g_dbus_object_get_interfaces(objects_iter->data);
+        GList* interfaces_iter = interfaces;
+        while (interfaces_iter != NULL) {
+            g_debug("Checking managed object %s, interface %s", 
+                    g_dbus_object_get_object_path (objects_iter->data),
+                    g_dbus_proxy_get_interface_name (interfaces_iter->data));
+            if (g_strcmp0(g_dbus_proxy_get_interface_name (interfaces_iter->data),
+                "org.neard.Adapter") == 0) {
+                _setup_nfc_adapter(self, interfaces_iter->data);
+            }
+            g_object_unref(interfaces_iter->data);
+            interfaces_iter = interfaces_iter->next;
+        }
+        g_list_free(interfaces);
+        g_object_unref(objects_iter->data);
+        objects_iter = objects_iter->next;
+    }
+    g_list_free(objects);
+    
+}
+
+
+
+void _on_interface_removed(GDBusObjectManager *manager,
+                         GDBusObject        *object,
+                         GDBusInterface     *interface,
+                         gpointer            user_data)
+{
+    GTlmNfc* self = GTLM_NFC(user_data);
+    GDBusProxy* proxy = G_DBUS_PROXY(interface);
+    g_debug("Object %s removed interface %s", 
+                    g_dbus_object_get_object_path (object),
+                    g_dbus_proxy_get_interface_name (proxy));    
+
+    if (g_strcmp0(g_dbus_proxy_get_interface_name (proxy),
+                "org.neard.Tag") == 0) {
+        g_signal_emit(self, signals[SIG_TAG_LOST], 0, g_dbus_object_get_object_path (object));
+    
+        GVariant* adapter_v = g_dbus_proxy_get_cached_property(proxy, "Adapter");
+        if (adapter_v == NULL || !g_variant_is_of_type(adapter_v, G_VARIANT_TYPE_OBJECT_PATH)) {
+            g_debug("Adapter property is absent on a tag");
+            return;
+        }
+        const gchar* adapter_path = g_variant_get_string(adapter_v, NULL);
+        g_debug("Tag belongs to adapter %s", adapter_path);
+        GError* error = NULL;
+        GDBusProxy* adapter = g_dbus_proxy_new_for_bus_sync(G_BUS_TYPE_SYSTEM,
+                                         G_DBUS_PROXY_FLAGS_NONE,
+                                         NULL, /* GDBusInterfaceInfo */
+                                         "org.neard",
+                                         adapter_path,
+                                         "org.neard.Adapter",
+                                         NULL, /* GCancellable */
+                                         &error);
+        if (adapter == NULL) {
+            g_debug ("Error creating adapter proxy: %s", error->message);
+            g_error_free(error);
+            g_variant_unref(adapter_v);
+            return;
+        }        
+        // start polling on an adapter
+        _setup_nfc_adapter(self, adapter);
+        g_object_unref(adapter);
+        g_variant_unref(adapter_v);
+        return;
+    }
+
+    
+}
+
+
+void _on_object_added(GDBusObjectManager *manager,
+                         GDBusObject        *object,
+                         gpointer            user_data)
+{
+    //GTlmNfc* self = GTLM_NFC(user_data);
+    g_debug("Object %s added", 
+                    g_dbus_object_get_object_path (object));
+    
+    GList* interfaces = g_dbus_object_get_interfaces(object);
+    GList* interfaces_iter = interfaces;
+    while (interfaces_iter != NULL) {
+        _on_interface_added(manager, object, interfaces_iter->data, user_data);
+        g_object_unref(interfaces_iter->data);
+        interfaces_iter = interfaces_iter->next;
+    }
+    g_list_free(interfaces);
+    g_debug("Finished checking interfaces");   
+}
+
+void _on_object_removed(GDBusObjectManager *manager,
+                         GDBusObject        *object,
+                         gpointer            user_data)
+{
+    //GTlmNfc* self = GTLM_NFC(user_data);
+    g_debug("Object %s removed", 
+                    g_dbus_object_get_object_path (object));
+
+    GList* interfaces = g_dbus_object_get_interfaces(object);
+    GList* interfaces_iter = interfaces;
+    while (interfaces_iter != NULL) {
+        _on_interface_removed(manager, object, interfaces_iter->data, user_data);
+        g_object_unref(interfaces_iter->data);
+        interfaces_iter = interfaces_iter->next;
+    }
+    g_list_free(interfaces);
+    g_debug("Finished checking interfaces");       
+}
+
+void _on_property_changed (GDBusObjectManagerClient *manager,
+                                                        GDBusObjectProxy         *object_proxy,
+                                                        GDBusProxy               *interface_proxy,
+                                                        GVariant                 *changed_properties,
+                                                        GStrv                     invalidated_properties,
+                                                        gpointer                  user_data)
+{
+    gchar *parameters_str;
+
+    parameters_str = g_variant_print (changed_properties, TRUE);
+    g_debug("Property of object %s changed:\n%s",
+            g_dbus_object_get_object_path(G_DBUS_OBJECT(object_proxy)), parameters_str);
+    g_debug("Invalidated properties:");
+    while (*invalidated_properties != NULL) {
+        g_print(*invalidated_properties);
+        invalidated_properties++;
+    }
+    g_free(parameters_str);
+}
+
+static void _setup_agent_and_adapters(GTlmNfc* self)
+{
+    GError *error = NULL;
+
+    /* Introspection data for the agent object we are exporting */
+    const gchar introspection_xml[] =
+        "<node>"
+        "  <interface name='org.neard.NDEFAgent'>"
+        "    <method name='GetNDEF'>"
+        "      <arg type='a{sv}' name='values' direction='in'/>"
+        "    </method>"
+        "    <method name='Release'>"
+        "    </method>"
+        "  </interface>"
+        "</node>";
+    
+    const GDBusInterfaceVTable interface_vtable =
+    {
+        _handle_agent_method_call,
+        _handle_agent_get_property,
+        _handle_agent_set_property
+    };
+
+    self->system_bus = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &error);
+    
+    if (self->system_bus == NULL) {
+        g_debug ("Error getting a system bus: %s", error->message);
+        g_error_free (error);
+        return;
+    }        
+    
+    GDBusNodeInfo *introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
+      
+    self->agent_registration_id = g_dbus_connection_register_object (self->system_bus,
+                                                       "/org/tlmnfc/agent",
+                                                       introspection_data->interfaces[0],
+                                                       &interface_vtable,
+                                                       self,
+                                                       NULL,
+                                                       &error);
+
+    if (self->agent_registration_id <= 0) {
+        g_debug ("Error registering an agent object: %s", error->message);
+        g_dbus_node_info_unref (introspection_data);
+        g_error_free (error);
+        return;
+    }
+    g_dbus_node_info_unref (introspection_data);
+    
+    GVariant* agent_register_response = g_dbus_connection_call_sync (self->system_bus,
+                                         "org.neard",
+                                         "/org/neard",
+                                         "org.neard.AgentManager",
+                                        "RegisterNDEFAgent",
+                                        g_variant_new("(os)", 
+                                                      "/org/tlmnfc/agent", 
+                                                      "application/gtlm-nfc"),
+                                        NULL,              
+                                        G_DBUS_CALL_FLAGS_NONE,
+                                        -1,
+                                        NULL,
+                                        &error);
+    if (agent_register_response == NULL) {
+        g_debug ("Error registering an agent with neard: %s", error->message);
+        g_error_free (error);
+        return;
+    }
+    g_variant_unref(agent_register_response);
+
+    
+    self->neard_manager =  g_dbus_object_manager_client_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
+                                         G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_NONE,
+                                         "org.neard",
+                                         "/",
+                                         NULL, NULL, NULL, NULL,
+                                         &error);
+    if (self->neard_manager == NULL)
+    {
+        g_debug ("Error creating neard object manager: %s", error->message);
+        g_error_free (error);
+        return ;
+    }
+    
+    // subscribe to interface added/removed signals
+    g_signal_connect (G_DBUS_OBJECT_MANAGER(self->neard_manager),
+                    "interface-added",
+                    G_CALLBACK (_on_interface_added),
+                    self);
+    g_signal_connect (G_DBUS_OBJECT_MANAGER(self->neard_manager),
+                    "interface-removed",
+                    G_CALLBACK (_on_interface_removed),
+                    self);
+    g_signal_connect (G_DBUS_OBJECT_MANAGER(self->neard_manager),
+                    "object-added",
+                    G_CALLBACK (_on_object_added),
+                    self);
+    g_signal_connect (G_DBUS_OBJECT_MANAGER(self->neard_manager),
+                    "object-removed",
+                    G_CALLBACK (_on_object_removed),
+                    self);
+    
+    
+    g_signal_connect (G_DBUS_OBJECT_MANAGER(self->neard_manager),
+                    "interface-proxy-properties-changed",
+                    G_CALLBACK (_on_property_changed),
+                    self);
+    
+
+    
+    _setup_nfc_adapters(self);    
+    return;
+}
+
+
+static void
+gtlm_nfc_init (GTlmNfc *self)
+{
+    
+    _setup_agent_and_adapters(self);
+}
+
+static void
+gtlm_nfc_set_property (GObject      *object,
+                                       guint         property_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+    switch (property_id)
+    {
+        default:
+            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+            break;
+    }
+}
+
+static void
+gtlm_nfc_get_property (GObject    *object,
+                                       guint       prop_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+    GTlmNfc *tlm_nfc = GTLM_NFC (object);
+    (void) tlm_nfc;
+    switch (prop_id)
+    {
+            
+        default:
+            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+            break;
+    }
+}
+
+static void gtlm_nfc_dispose(GObject *object)
+{
+    GTlmNfc* self = GTLM_NFC (object);
+
+    if (self->system_bus) {
+        GError* error = NULL;
+        GVariant* agent_register_response = g_dbus_connection_call_sync (self->system_bus,
+                                         "org.neard",
+                                         "/org/neard",
+                                         "org.neard.AgentManager",
+                                        "UnregisterNDEFAgent",
+                                        g_variant_new("(os)",
+                                                      "/org/tlmnfc/agent",
+                                                      "application/gtlm-nfc"),
+                                        NULL,
+                                        G_DBUS_CALL_FLAGS_NONE,
+                                        -1,
+                                        NULL,
+                                        &error);
+        if (agent_register_response == NULL) {
+            g_debug ("Error unregistering an agent with neard: %s", error->message);
+            g_error_free (error);
+        }
+        g_variant_unref(agent_register_response);
+    }
+    if (self->agent_registration_id > 0)
+        if (g_dbus_connection_unregister_object(self->system_bus, self->agent_registration_id) == FALSE)
+            g_debug("Error unregistering agent object");
+
+
+    if (self->neard_manager) {
+        g_object_unref(self->neard_manager);
+        self->neard_manager = NULL;
+    }
+    if (self->system_bus) {
+        g_object_unref(self->system_bus);
+        self->system_bus = NULL;
+    }
+    
+    G_OBJECT_CLASS (gtlm_nfc_parent_class)->dispose (object);
+}
+
+static void gtlm_nfc_finalize(GObject *object)
+{
+    //GTlmNfc* self = GTLM_NFC (object);
+    
+
+    G_OBJECT_CLASS (gtlm_nfc_parent_class)->finalize (object);
+}
+
+static void
+gtlm_nfc_class_init (GTlmNfcClass *klass)
+{
+    GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+    
+    gobject_class->set_property = gtlm_nfc_set_property;
+    gobject_class->get_property = gtlm_nfc_get_property;
+    gobject_class->dispose = gtlm_nfc_dispose;
+    gobject_class->finalize = gtlm_nfc_finalize;
+    
+    
+    /**
+     * GTlmNfc::tag-found:
+     * @tlm_nfc: the object which emitted the signal
+     * @nfc_tag_path: an identifier of the tag (use in gtlm_nfc_write_username_password())
+     * 
+     * This signal is issued by #GTlmNfc object when a tag has been found.
+     */
+    signals[SIG_TAG_FOUND] = g_signal_new ("tag-found", 
+        G_TYPE_TLM_NFC,
+        G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL, G_TYPE_NONE,
+        1, G_TYPE_STRING);
+        //2, G_TYPE_STRING, G_TYPE_STRING);    
+
+    /**
+     * GTlmNfc::tag-lost:
+     * @tlm_nfc: the object which emitted the signal
+     * @nfc_tag_path: an identifier of the tag
+     * 
+     * This signal is issued by #GTlmNfc object when a tag has been lost.
+     */
+    signals[SIG_TAG_LOST] = g_signal_new ("tag-lost", 
+        G_TYPE_TLM_NFC,
+        G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL, G_TYPE_NONE,
+        1, G_TYPE_STRING);
+
+    /**
+     * GTlmNfc::record-found:
+     * @tlm_nfc: the object which emitted the signal
+     * @username: the username on the tag
+     * @password: the password on the tag
+     * 
+     * This signal is issued by #GTlmNfc object when a username and password pair
+     * has been found on a tag.
+     */
+    signals[SIG_RECORD_FOUND] = g_signal_new ("record-found", 
+        G_TYPE_TLM_NFC,
+        G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL, G_TYPE_NONE,
+        2, G_TYPE_STRING, G_TYPE_STRING);    
+
+    /**
+     * GTlmNfc::no-record-found:
+     * @tlm_nfc: the object which emitted the signal
+     * 
+     * This signal is issued by #GTlmNfc object when a username and password pair
+     * has not been found on a tag
+     */
+    signals[SIG_NO_RECORD_FOUND] = g_signal_new ("no-record-found", 
+        G_TYPE_TLM_NFC,
+        G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL, G_TYPE_NONE,
+        0);     
+    
+}
diff --git a/src/gtlm-nfc.h b/src/gtlm-nfc.h
new file mode 100644
index 0000000..361525e
--- /dev/null
+++ b/src/gtlm-nfc.h
@@ -0,0 +1,72 @@
+/* vi: set et sw=4 ts=4 cino=t0,(0: */
+/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of libtlm-nfc
+ *
+ * Copyright (C) 2013 Intel Corporation.
+ *
+ * Contact: Alexander Kanavin <alex.kanavin@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef __GTLM_NFC_H__
+#define __GTLM_NFC_H__
+
+#include <glib-object.h>
+#include <gio/gio.h>
+
+typedef enum {
+    GTLM_NFC_ERROR_NONE,
+
+    GTLM_NFC_ERROR_NO_TAG = 1
+   
+} GTlmNfcError;
+
+#define G_TYPE_TLM_NFC             (gtlm_nfc_get_type ())
+#define GTLM_NFC(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_TLM_NFC, GTlmNfc))
+#define G_IS_TLM_NFC(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), G_TYPE_TLM_NFC))
+#define GTLM_NFC_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), G_TYPE_TLM_NFC, GTlmNfcClass))
+#define G_IS_TLM_NFC_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), G_TYPE_TLM_NFC))
+#define GTLM_NFC_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), G_TYPE_TLM_NFC, GTlmNfcClass))
+
+
+typedef struct _GTlmNfc        GTlmNfc;
+typedef struct _GTlmNfcClass   GTlmNfcClass;
+
+struct _GTlmNfc
+{
+    GObject parent_instance;
+    
+    GDBusObjectManager* neard_manager; 
+    GDBusConnection* system_bus;
+    guint agent_registration_id;
+};
+
+struct _GTlmNfcClass
+{
+    GObjectClass parent_class;
+};
+
+GType gtlm_nfc_get_type (void);
+
+void gtlm_nfc_write_username_password(GTlmNfc* tlm_nfc, 
+                                      const gchar* nfc_tag_path,
+                                      const gchar* username, 
+                                      const gchar* password,
+                                      GError** error);
+
+#endif /* __GTLM_NFC_H__ */
\ No newline at end of file