1 files changed, 205 insertions, 0 deletions

diff --git a/src/datastore/gnunet-service-datastore.c b/src/datastore/gnunet-service-datastore.c
new file mode 100644
index 000000000..8ee153db0
--- /dev/null
+++ b/src/datastore/gnunet-service-datastore.c
@@ -0,0 +1,205 @@
+/*
+     This file is part of GNUnet
+     (C) 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 2, or (at your
+     option) any later version.
+
+     GNUnet 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
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file datastore/gnunet-service-datastore.c
+ * @brief Management for the datastore for files stored on a GNUnet node
+ * @author Christian Grothoff
+ */
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_protocols.h"
+#include "plugin_datastore.h"
+#include "datastore.h"
+
+
+/**
+ * Our datastore plugin.
+ */
+struct DatastorePlugin
+{
+
+  /**
+   * API of the transport as returned by the plugin's
+   * initialization function.
+   */
+  struct GNUNET_DATSTORE_PluginFunctions *api;
+
+  /**
+   * Short name for the plugin (i.e. "sqlite").
+   */
+  char *short_name;
+
+  /**
+   * Name of the library (i.e. "gnunet_plugin_datastore_sqlite").
+   */
+  char *lib_name;
+
+  /**
+   * Environment this transport service is using
+   * for this plugin.
+   */
+  struct GNUNET_DATASTORE_PluginEnvironment env;
+
+};
+
+
+/**
+ * Our datastore plugin (NULL if not available).
+ */
+static struct DatastorePlugin *plugin;
+
+
+/**
+ * List of handlers for the messages understood by this
+ * service.
+ */
+static struct GNUNET_SERVER_MessageHandler handlers[] = {
+  /*  {&handle_xxx, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_XXX, 0}, */
+  {NULL, NULL, 0, 0}
+};
+
+
+
+/**
+ * Load the datastore plugin.
+ */
+static struct DatastorePlugin *
+load_plugin (struct GNUNET_CONFIGURATION_Handle *cfg,
+             struct GNUNET_SCHEDULER_Handle *sched)
+{
+  struct DatastorePlugin *ret;
+  char *libname;
+  char *name;
+
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_string (cfg,
+                                             "DATASTORE", "DATABASE", &name))
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  _("No `%s' specified for `%s' in configuration!\n"),
+                  "DATABASE",
+                  "DATASTORE");
+      return NULL;
+    }
+  ret = GNUNET_malloc (sizeof(struct DatastorePlugin));
+  ret->env.cfg = cfg;
+  ret->env.sched = sched;  
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              _("Loading `%s' datastore plugin\n"), name);
+  GNUNET_asprintf (&libname, "libgnunet_plugin_datastore_%s", name);
+  ret->short_name = GNUNET_strdup (name);
+  ret->lib_name = libname;
+  ret->api = GNUNET_PLUGIN_load (libname, &ret->env);
+  if (ret->api == NULL)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  _("Failed to load datastore plugin for `%s'\n"), name);
+      GNUNET_free (ret->short_name);
+      GNUNET_free (libname);
+      GNUNET_free (ret);
+      return NULL;
+    }
+  return ret;
+}
+
+
+/**
+ * Function called when the service shuts
+ * down.  Unloads our datastore plugin.
+ *
+ * @param cls closure
+ * @param cfg configuration to use
+ */
+static void
+unload_plugin (struct DatastorePlugin *plug)
+{
+#if DEBUG_DATASTORE
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Datastore service is unloading plugin...\n");
+#endif
+  GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
+  GNUNET_free (plug->lib_name);
+  GNUNET_free (plug->short_name);
+  GNUNET_free (plug);
+}
+
+
+/**
+ * Last task run during shutdown.  Disconnects us from
+ * the transport and core.
+ */
+static void
+cleaning_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  unload_plugin (plugin);
+  plugin = NULL;
+}
+
+
+/**
+ * Process datastore requests.
+ *
+ * @param cls closure
+ * @param sched scheduler to use
+ * @param server the initialized server
+ * @param cfg configuration to use
+ */
+static void
+run (void *cls,
+     struct GNUNET_SCHEDULER_Handle *sched,
+     struct GNUNET_SERVER_Handle *server,
+     struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  plugin = load_plugin (cfg, sched);
+  if (NULL == plugin)
+    return;
+  GNUNET_SERVER_add_handlers (server, handlers);
+  GNUNET_SCHEDULER_add_delayed (sched,
+                                GNUNET_YES,
+                                GNUNET_SCHEDULER_PRIORITY_IDLE,
+                                GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
+                                GNUNET_TIME_UNIT_FOREVER_REL,
+                                &cleaning_task, NULL);
+}
+
+
+/**
+ * The main function for the datastore service.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+  int ret;
+
+  ret = (GNUNET_OK ==
+         GNUNET_SERVICE_run (argc,
+                             argv,
+                             "datastore", &run, NULL, NULL, NULL)) ? 0 : 1;
+  return ret;
+}
+
+
+/* end of gnunet-service-datastore.c */