1 files changed, 270 insertions, 0 deletions

diff --git a/src/testbed-logger/gnunet-service-testbed-logger.c b/src/testbed-logger/gnunet-service-testbed-logger.c
new file mode 100644
index 000000000..1c250b306
--- /dev/null
+++ b/src/testbed-logger/gnunet-service-testbed-logger.c
@@ -0,0 +1,270 @@
+/*
+  This file is part of GNUnet.
+  Copyright (C) 2008--2013 GNUnet e.V.
+
+  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 3, 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., 51 Franklin Street, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+*/
+
+/**
+ * @file testbed-logger/gnunet-service-testbed-logger.c
+ * @brief service for collecting messages and writing to a file
+ * @author Sree Harsha Totakura
+ */
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+
+/**
+ * Generic logging shorthand
+ */
+#define LOG(type, ...)                         \
+  GNUNET_log (type, __VA_ARGS__)
+
+/**
+ * Debug logging shorthand
+ */
+#define LOG_DEBUG(...)                          \
+  LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
+
+/**
+ * The message queue for sending messages to clients
+ */
+struct MessageQueue
+{
+  /**
+   * The message to be sent
+   */
+  struct GNUNET_MessageHeader *msg;
+
+  /**
+   * The client to send the message to
+   */
+  struct GNUNET_SERVER_Client *client;
+
+  /**
+   * next pointer for DLL
+   */
+  struct MessageQueue *next;
+
+  /**
+   * prev pointer for DLL
+   */
+  struct MessageQueue *prev;
+};
+
+/**
+ * The message queue head
+ */
+static struct MessageQueue *mq_head;
+
+/**
+ * The message queue tail
+ */
+static struct MessageQueue *mq_tail;
+
+/**
+ * Handle for buffered writing.
+ */
+struct GNUNET_BIO_WriteHandle *bio;
+
+/**
+ * The number of connections we have
+ */
+static unsigned int nconn;
+
+/**
+ * Are we shutting down?
+ */
+static int in_shutdown;
+
+
+/**
+ * Message handler for #GNUNET_MESSAGE_TYPE_TESTBED_ADDHOST messages
+ *
+ * @param cls NULL
+ * @param client identification of the client
+ * @param msg the actual message
+ */
+static void
+handle_log_msg (void *cls,
+                struct GNUNET_SERVER_Client *client,
+                const struct GNUNET_MessageHeader *msg)
+{
+  uint16_t ms;
+
+  ms = ntohs (msg->size);
+  ms -= sizeof (struct GNUNET_MessageHeader);
+  GNUNET_BIO_write (bio, &msg[1], ms);
+  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Task to clean up and shutdown nicely
+ *
+ * @param cls NULL
+ */
+static void
+shutdown_task (void *cls)
+{
+  struct MessageQueue *mq_entry;
+
+  in_shutdown = GNUNET_YES;
+  if (0 != nconn)
+  {
+    /* Delay shutdown if there are active connections */
+    GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
+    return;
+  }
+  while (NULL != (mq_entry = mq_head))
+  {
+    GNUNET_free (mq_entry->msg);
+    GNUNET_SERVER_client_drop (mq_entry->client);
+    GNUNET_CONTAINER_DLL_remove (mq_head,
+                                 mq_tail,
+                                 mq_entry);
+    GNUNET_free (mq_entry);
+  }
+  GNUNET_break (GNUNET_OK == GNUNET_BIO_write_close (bio));
+}
+
+
+/**
+x * Functions with this signature are called whenever a client
+ * is disconnected on the network level.
+ *
+ * @param cls closure
+ * @param client identification of the client; NULL
+ *        for the last call when the server is destroyed
+ */
+static void
+client_disconnected (void *cls,
+                     struct GNUNET_SERVER_Client *client)
+{
+  if (NULL == client)
+  {
+    GNUNET_break (0 == nconn);
+    return;
+  }
+  nconn--;
+  if (GNUNET_YES == in_shutdown)
+    GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Functions with this signature are called whenever a client
+ * is connected on the network level.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ */
+static void
+client_connected (void *cls,
+                  struct GNUNET_SERVER_Client *client)
+{
+  if (NULL == client)
+  {
+    GNUNET_break (0 == nconn);
+    return;
+  }
+  GNUNET_SERVER_client_persist_ (client);
+  nconn++;
+}
+
+
+/**
+ * Testbed setup
+ *
+ * @param cls closure
+ * @param server the initialized server
+ * @param cfg configuration to use
+ */
+static void
+logger_run (void *cls,
+            struct GNUNET_SERVER_Handle *server,
+            const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  static const struct GNUNET_SERVER_MessageHandler message_handlers[] = {
+    {&handle_log_msg, NULL, GNUNET_MESSAGE_TYPE_TESTBED_LOGGER_MSG, 0},
+    {NULL, NULL, 0, 0}
+  };
+  char *dir;
+  char *fn;
+  char *hname;
+  size_t hname_len;
+  pid_t pid;
+
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_filename (cfg,
+                                               "TESTBED-LOGGER",
+                                               "DIR",
+                                               &dir))
+  {
+    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+                               "TESTBED-LOGGER",
+                               "DIR");
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
+  pid = getpid ();
+  hname_len = GNUNET_OS_get_hostname_max_length ();
+  hname = GNUNET_malloc (hname_len);
+  if (0 != gethostname (hname, hname_len))
+  {
+    LOG (GNUNET_ERROR_TYPE_ERROR,
+         "Cannot get hostname.  Exiting\n");
+    GNUNET_free (hname);
+    GNUNET_free (dir);
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
+  GNUNET_asprintf (&fn,
+                   "%s/%.*s_%jd.dat",
+                   dir,
+                   hname_len,
+                   hname,
+                   (intmax_t) pid);
+  GNUNET_free (hname);
+  GNUNET_free (dir);
+  if (NULL == (bio = GNUNET_BIO_write_open (fn)))
+  {
+    GNUNET_free (fn);
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
+  GNUNET_free (fn);
+  GNUNET_SERVER_add_handlers (server, message_handlers);
+  GNUNET_SERVER_connect_notify (server, &client_connected, NULL);
+  GNUNET_SERVER_disconnect_notify (server, &client_disconnected, NULL);
+  GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
+  LOG_DEBUG ("TESTBED-LOGGER startup complete\n");
+}
+
+
+/**
+ * The starting point of execution
+ */
+int
+main (int argc, char *const *argv)
+{
+  return (GNUNET_OK ==
+          GNUNET_SERVICE_run (argc, argv, "testbed-logger",
+                              GNUNET_SERVICE_OPTION_NONE,
+                              &logger_run, NULL)) ? 0 : 1;
+}
+
+/* end of gnunet-service-testbed-logger.c */