dbus: split out object management code into dbus-common, and simplify it

1 files changed, 119 insertions, 0 deletions

diff --git a/src/dbus-common.h b/src/dbus-common.h
index 76333cd4f..729519c52 100644
--- a/src/dbus-common.h
+++ b/src/dbus-common.h
@@ -24,6 +24,65 @@
 
 #include <dbus/dbus.h>
 
+#ifndef DBUS_ERROR_UNKNOWN_OBJECT
+#define DBUS_ERROR_UNKNOWN_OBJECT "org.freedesktop.DBus.Error.UnknownObject"
+#endif
+
+#ifndef DBUS_ERROR_UNKNOWN_INTERFACE
+#define DBUS_ERROR_UNKNOWN_INTERFACE "org.freedesktop.DBus.Error.UnknownInterface"
+#endif
+
+#ifndef DBUS_ERROR_UNKNOWN_PROPERTY
+#define DBUS_ERROR_UNKNOWN_PROPERTY "org.freedesktop.DBus.Error.UnknownProperty"
+#endif
+
+#ifndef DBUS_ERROR_PROPERTY_READ_ONLY
+#define DBUS_ERROR_PROPERTY_READ_ONLY "org.freedesktop.DBus.Error.PropertyReadOnly"
+#endif
+
+#define BUS_PROPERTIES_INTERFACE                                        \
+        " <interface name=\"org.freedesktop.DBus.Properties\">\n"       \
+        "  <method name=\"Get\">\n"                                     \
+        "   <arg name=\"interface\" direction=\"in\" type=\"s\"/>\n"    \
+        "   <arg name=\"property\" direction=\"in\" type=\"s\"/>\n"     \
+        "   <arg name=\"value\" direction=\"out\" type=\"v\"/>\n"       \
+        "  </method>\n"                                                 \
+        "  <method name=\"GetAll\">\n"                                  \
+        "   <arg name=\"interface\" direction=\"in\" type=\"s\"/>\n"    \
+        "   <arg name=\"properties\" direction=\"out\" type=\"a{sv}\"/>\n" \
+        "  </method>\n"                                                 \
+        "  <method name=\"Set\">\n"                                     \
+        "   <arg name=\"interface\" direction=\"in\" type=\"s\"/>\n"    \
+        "   <arg name=\"property\" direction=\"in\" type=\"s\"/>\n"     \
+        "   <arg name=\"value\" direction=\"in\" type=\"v\"/>\n"        \
+        "  </method>\n"                                                 \
+        "  <signal name=\"PropertiesChanged\">\n"                       \
+        "   <arg type=\"s\" name=\"interface\"/>\n"                     \
+        "   <arg type=\"a{sv}\" name=\"changed_properties\"/>\n"        \
+        "   <arg type=\"as\" name=\"invalidated_properties\"/>\n"       \
+        "  </signal>\n"                                                 \
+        " </interface>\n"
+
+#define BUS_INTROSPECTABLE_INTERFACE                                    \
+        " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"   \
+        "  <method name=\"Introspect\">\n"                              \
+        "   <arg name=\"data\" type=\"s\" direction=\"out\"/>\n"        \
+        "  </method>\n"                                                 \
+        " </interface>\n"
+
+#define BUS_PEER_INTERFACE                                              \
+        "<interface name=\"org.freedesktop.DBus.Peer\">\n"              \
+        " <method name=\"Ping\"/>\n"                                    \
+        " <method name=\"GetMachineId\">\n"                             \
+        "  <arg type=\"s\" name=\"machine_uuid\" direction=\"out\"/>\n" \
+        " </method>\n"                                                  \
+        "</interface>\n"
+
+#define BUS_GENERIC_INTERFACES_LIST             \
+        "org.freedesktop.DBus.Properties\0"     \
+        "org.freedesktop.DBus.Introspectable\0" \
+        "org.freedesktop.DBus.Peer\0"
+
 int bus_check_peercred(DBusConnection *c);
 
 int bus_connect(DBusBusType t, DBusConnection **_bus, bool *private_bus, DBusError *error);
@@ -33,4 +92,64 @@ int bus_connect_system_polkit(DBusConnection **_bus, DBusError *error);
 
 const char *bus_error_message(const DBusError *error);
 
+typedef int (*BusPropertyCallback)(DBusMessageIter *iter, const char *property, void *data);
+typedef int (*BusPropertySetCallback)(DBusMessageIter *iter, const char *property);
+
+typedef struct BusProperty {
+        const char *interface;           /* interface of the property */
+        const char *property;            /* name of the property */
+        BusPropertyCallback append;      /* Function that is called to serialize this property */
+        const char *signature;
+        const void *data;                /* The data of this property */
+        BusPropertySetCallback set;      /* Optional: Function that is called to set this property */
+} BusProperty;
+
+DBusHandlerResult bus_send_error_reply(
+                DBusConnection *c,
+                DBusMessage *message,
+                DBusError *bus_error,
+                int error);
+
+DBusHandlerResult bus_default_message_handler(
+                DBusConnection *c,
+                DBusMessage *message,
+                const char *introspection,
+                const char *interfaces,
+                const BusProperty *properties);
+
+int bus_property_append_string(DBusMessageIter *i, const char *property, void *data);
+int bus_property_append_strv(DBusMessageIter *i, const char *property, void *data);
+int bus_property_append_bool(DBusMessageIter *i, const char *property, void *data);
+int bus_property_append_int32(DBusMessageIter *i, const char *property, void *data);
+int bus_property_append_uint32(DBusMessageIter *i, const char *property, void *data);
+int bus_property_append_uint64(DBusMessageIter *i, const char *property, void *data);
+int bus_property_append_size(DBusMessageIter *i, const char *property, void *data);
+int bus_property_append_ul(DBusMessageIter *i, const char *property, void *data);
+
+#define bus_property_append_int bus_property_append_int32
+#define bus_property_append_pid bus_property_append_uint32
+#define bus_property_append_mode bus_property_append_uint32
+#define bus_property_append_unsigned bus_property_append_uint32
+#define bus_property_append_usec bus_property_append_uint64
+
+#define DEFINE_BUS_PROPERTY_APPEND_ENUM(function,name,type)             \
+        int function(DBusMessageIter *i, const char *property, void *data) { \
+                const char *value;                                      \
+                type *field = data;                                     \
+                                                                        \
+                assert(i);                                              \
+                assert(property);                                       \
+                                                                        \
+                value = name##_to_string(*field);                       \
+                                                                        \
+                if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &value)) \
+                        return -ENOMEM;                                 \
+                                                                        \
+                return 0;                                               \
+        }
+
+const char *bus_errno_to_dbus(int error);
+
+DBusMessage* bus_properties_changed_new(const char *path, const char *interface, const char *properties);
+
 #endif