Rewrite cadet tests using MQ API

6 files changed, 1547 insertions, 3 deletions

diff --git a/src/cadet/.gitignore b/src/cadet/.gitignore
index a38b8f495..a73006dae 100644
--- a/src/cadet/.gitignore
+++ b/src/cadet/.gitignore
@@ -21,3 +21,4 @@ test_cadet_local
 test_cadet_single
 gnunet-service-cadet-new
 test_cadet_local_mq
+test_cadet_2_forward_new
\ No newline at end of file
diff --git a/src/cadet/Makefile.am b/src/cadet/Makefile.am
index 1a51453c9..74791d66e 100644
--- a/src/cadet/Makefile.am
+++ b/src/cadet/Makefile.am
@@ -110,7 +110,7 @@ endif
 
 
 if HAVE_TESTING
- noinst_LIBRARIES = libgnunetcadettest.a $(noinst_LIB_EXP)
+ noinst_LIBRARIES = libgnunetcadettest.a libgnunetcadettestnew.a $(noinst_LIB_EXP)
  noinst_PROGRAMS = gnunet-cadet-profiler
 endif
 
@@ -124,6 +124,7 @@ libgnunetcadettest_a_LIBADD = \
 if HAVE_TESTING
 check_PROGRAMS = \
   test_cadet_local_mq \
+  test_cadet_2_forward_new \
   test_cadet_single \
   test_cadet_local \
   test_cadet_2_forward \
@@ -245,6 +246,31 @@ test_cadet_5_speed_reliable_backwards_SOURCES = \
 test_cadet_5_speed_reliable_backwards_LDADD = $(ld_cadet_test_lib)
 
 
+# NEW TESTS
+libgnunetcadettestnew_a_SOURCES = \
+  cadet_test_lib_new.c cadet_test_lib_new.h
+libgnunetcadettestnew_a_LIBADD = \
+ $(top_builddir)/src/util/libgnunetutil.la \
+ $(top_builddir)/src/testbed/libgnunettestbed.la \
+ libgnunetcadetnew.la
+
+ld_cadet_test_lib_new = \
+  $(top_builddir)/src/util/libgnunetutil.la \
+  $(top_builddir)/src/testing/libgnunettesting.la \
+  libgnunetcadetnew.la \
+  libgnunetcadettestnew.a \
+  $(top_builddir)/src/testbed/libgnunettestbed.la \
+  $(top_builddir)/src/statistics/libgnunetstatistics.la
+dep_cadet_test_lib_new = \
+  libgnunetcadetnew.la \
+  libgnunetcadettestnew.a \
+  $(top_builddir)/src/statistics/libgnunetstatistics.la
+
+test_cadet_2_forward_new_SOURCES = \
+  test_cadet_new.c
+test_cadet_2_forward_new_LDADD = $(ld_cadet_test_lib_new)
+
+
 if ENABLE_TEST_RUN
 AM_TESTS_ENVIRONMENT=export GNUNET_PREFIX=$${GNUNET_PREFIX:-@libdir@};export PATH=$${GNUNET_PREFIX:-@prefix@}/bin:$$PATH;unset XDG_DATA_HOME;unset XDG_CONFIG_HOME;
 TESTS = \
diff --git a/src/cadet/cadet_test_lib_new.c b/src/cadet/cadet_test_lib_new.c
new file mode 100644
index 000000000..c3a1540f4
--- /dev/null
+++ b/src/cadet/cadet_test_lib_new.c
@@ -0,0 +1,362 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2012, 2017 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 cadet/cadet_test_lib.c
+ * @author Bartlomiej Polot
+ * @brief library for writing CADET tests
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "cadet_test_lib_new.h"
+#include "gnunet_cadet_service.h"
+
+
+/**
+ * Test context for a CADET Test.
+ */
+struct GNUNET_CADET_TEST_Context
+{
+  /**
+   * Array of running peers.
+   */
+  struct GNUNET_TESTBED_Peer **peers;
+
+  /**
+   * Array of handles to the CADET for each peer.
+   */
+  struct GNUNET_CADET_Handle **cadets;
+
+  /**
+   * Operation associated with the connection to the CADET.
+   */
+  struct GNUNET_TESTBED_Operation **ops;
+
+  /**
+   * Number of peers running, size of the arrays above.
+   */
+  unsigned int num_peers;
+
+  /**
+   * Main function of the test to run once all CADETs are available.
+   */
+  GNUNET_CADET_TEST_AppMain app_main;
+
+  /**
+   * Closure for 'app_main'.
+   */
+  void *app_main_cls;
+
+  /**
+   * Handler for incoming tunnels.
+   */
+  GNUNET_CADET_ConnectEventHandler connects;
+
+  /**
+   * Function called when the transmit window size changes.
+   */
+  GNUNET_CADET_WindowSizeEventHandler window_changes;
+
+  /**
+   * Cleaner for destroyed incoming tunnels.
+   */
+  GNUNET_CADET_DisconnectEventHandler disconnects;
+
+  /**
+   * Message handlers.
+   */
+  struct GNUNET_MQ_MessageHandler *handlers;
+
+  /**
+   * Application ports.
+   */
+  const struct GNUNET_HashCode **ports;
+
+  /**
+   * Number of ports in #ports.
+   */
+  unsigned int port_count;
+
+};
+
+
+/**
+ * Context for a cadet adapter callback.
+ */
+struct GNUNET_CADET_TEST_AdapterContext
+{
+  /**
+   * Peer number for the particular peer.
+   */
+  unsigned int peer;
+
+  /**
+   * Port handlers for open ports.
+   */
+  struct GNUNET_CADET_Port **ports;
+ 
+  /**
+   * General context.
+   */
+  struct GNUNET_CADET_TEST_Context *ctx;
+};
+
+
+/**
+ * Adapter function called to establish a connection to
+ * the CADET service.
+ *
+ * @param cls closure
+ * @param cfg configuration of the peer to connect to; will be available until
+ *          GNUNET_TESTBED_operation_done() is called on the operation returned
+ *          from GNUNET_TESTBED_service_connect()
+ * @return service handle to return in 'op_result', NULL on error
+ */
+static void *
+cadet_connect_adapter (void *cls,
+                       const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  struct GNUNET_CADET_TEST_AdapterContext *actx = cls;
+  struct GNUNET_CADET_TEST_Context *ctx = actx->ctx;
+  struct GNUNET_CADET_Handle *h;
+  unsigned int i;
+
+  h = GNUNET_CADET_connecT (cfg);
+  if (NULL == ctx->ports)
+    return h;
+
+  actx->ports = GNUNET_new_array (ctx->port_count, struct GNUNET_CADET_Port *);
+  for (i = 0; i < ctx->port_count; i++)
+  {
+    actx->ports[i] = GNUNET_CADET_open_porT (h,
+                                             ctx->ports[i],
+                                             ctx->connects,
+                                             (void *) (long) actx->peer,
+                                             ctx->window_changes,
+                                             ctx->disconnects,
+                                             ctx->handlers);
+  }
+  return h;
+}
+
+
+/**
+ * Adapter function called to destroy a connection to
+ * the CADET service.
+ *
+ * @param cls closure
+ * @param op_result service handle returned from the connect adapter
+ */
+static void
+cadet_disconnect_adapter (void *cls,
+                         void *op_result)
+{
+  struct GNUNET_CADET_Handle *cadet = op_result;
+  struct GNUNET_CADET_TEST_AdapterContext *actx = cls;
+
+  if (NULL != actx->ports)
+  {
+    for (int i = 0; i < actx->ctx->port_count; i++)
+    {
+      GNUNET_CADET_close_port (actx->ports[i]);
+      actx->ports[i] = NULL;
+    }
+    GNUNET_free (actx->ports);
+  }
+  GNUNET_free (actx);
+  GNUNET_CADET_disconnect (cadet);
+}
+
+
+/**
+ * Callback to be called when a service connect operation is completed.
+ *
+ * @param cls The callback closure from functions generating an operation.
+ * @param op The operation that has been finished.
+ * @param ca_result The service handle returned from
+ *                  GNUNET_TESTBED_ConnectAdapter() (cadet handle).
+ * @param emsg Error message in case the operation has failed.
+ *             NULL if operation has executed successfully.
+ */
+static void
+cadet_connect_cb (void *cls,
+                 struct GNUNET_TESTBED_Operation *op,
+                 void *ca_result,
+                 const char *emsg)
+{
+  struct GNUNET_CADET_TEST_Context *ctx = cls;
+  unsigned int i;
+
+  if (NULL != emsg)
+  {
+    fprintf (stderr, "Failed to connect to CADET service: %s\n",
+             emsg);
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
+  for (i = 0; i < ctx->num_peers; i++)
+    if (op == ctx->ops[i])
+    {
+      ctx->cadets[i] = ca_result;
+      GNUNET_log (GNUNET_ERROR_TYPE_INFO, "...cadet %u connected\n", i);
+    }
+  for (i = 0; i < ctx->num_peers; i++)
+    if (NULL == ctx->cadets[i])
+      return; /* still some CADET connections missing */
+  /* all CADET connections ready! */
+  ctx->app_main (ctx->app_main_cls,
+                 ctx,
+                 ctx->num_peers,
+                 ctx->peers,
+                 ctx->cadets);
+}
+
+
+void
+GNUNET_CADET_TEST_cleanup (struct GNUNET_CADET_TEST_Context *ctx)
+{
+  unsigned int i;
+
+  for (i = 0; i < ctx->num_peers; i++)
+  {
+    GNUNET_assert (NULL != ctx->ops[i]);
+    GNUNET_TESTBED_operation_done (ctx->ops[i]);
+    ctx->ops[i] = NULL;
+  }
+  GNUNET_free (ctx->ops);
+  GNUNET_free (ctx->cadets);
+  GNUNET_free (ctx);
+  GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Callback run when the testbed is ready (peers running and connected to
+ * each other)
+ *
+ * @param cls Closure (context).
+ * @param h the run handle
+ * @param num_peers Number of peers that are running.
+ * @param peers Handles to each one of the @c num_peers peers.
+ * @param links_succeeded the number of overlay link connection attempts that
+ *          succeeded
+ * @param links_failed the number of overlay link connection attempts that
+ *          failed
+ */
+static void
+cadet_test_run (void *cls,
+               struct GNUNET_TESTBED_RunHandle *h,
+               unsigned int num_peers,
+               struct GNUNET_TESTBED_Peer **peers,
+               unsigned int links_succeeded,
+               unsigned int links_failed)
+{
+  struct GNUNET_CADET_TEST_Context *ctx = cls;
+  unsigned int i;
+
+  if (0 != links_failed)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Some links failed (%u), ending\n",
+                links_failed);
+    exit (2);
+  }
+
+  if  (num_peers != ctx->num_peers)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Peers started %u/%u, ending\n",
+                num_peers, ctx->num_peers);
+    exit (1);
+  }
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Testbed up, %u peers and %u links\n",
+              num_peers, links_succeeded);
+  ctx->peers = peers;
+  for (i = 0; i < num_peers; i++)
+  {
+    struct GNUNET_CADET_TEST_AdapterContext *newctx;
+    newctx = GNUNET_new (struct GNUNET_CADET_TEST_AdapterContext);
+    newctx->peer = i;
+    newctx->ctx = ctx;
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Connecting to cadet %u\n", i);
+    ctx->ops[i] = GNUNET_TESTBED_service_connect (ctx,
+                                                  peers[i],
+                                                  "cadet",
+                                                  &cadet_connect_cb,
+                                                  ctx,
+                                                  &cadet_connect_adapter,
+                                                  &cadet_disconnect_adapter,
+                                                  newctx);
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "op handle %p\n", ctx->ops[i]);
+  }
+}
+
+
+/**
+ * Run a test using the given name, configuration file and number of peers.
+ * All cadet callbacks will receive the peer number (long) as the closure.
+ *
+ * @param testname Name of the test (for logging).
+ * @param cfgfile Name of the configuration file.
+ * @param num_peers Number of peers to start.
+ * @param tmain Main function to run once the testbed is ready.
+ * @param tmain_cls Closure for @a tmain.
+ * @param connects Handler for incoming channels.
+ * @param window_changes Handler for the window size change notification.
+ * @param disconnects Cleaner for destroyed incoming channels.
+ * @param handlers Message handlers.
+ * @param ports Ports the peers offer, NULL-terminated.
+ */
+void
+GNUNET_CADET_TEST_ruN (const char *testname,
+                       const char *cfgfile,
+                       unsigned int num_peers,
+                       GNUNET_CADET_TEST_AppMain tmain,
+                       void *tmain_cls,
+                       GNUNET_CADET_ConnectEventHandler connects,
+                       GNUNET_CADET_WindowSizeEventHandler window_changes,
+                       GNUNET_CADET_DisconnectEventHandler disconnects,
+                       struct GNUNET_MQ_MessageHandler *handlers,
+                       const struct GNUNET_HashCode **ports)
+{
+  struct GNUNET_CADET_TEST_Context *ctx;
+
+  ctx = GNUNET_new (struct GNUNET_CADET_TEST_Context);
+  ctx->num_peers = num_peers;
+  ctx->ops = GNUNET_new_array (num_peers, struct GNUNET_TESTBED_Operation *);
+  ctx->cadets = GNUNET_new_array (num_peers, struct GNUNET_CADET_Handle *);
+  ctx->app_main = tmain;
+  ctx->app_main_cls = tmain_cls;
+  ctx->connects = connects;
+  ctx->window_changes = window_changes;
+  ctx->disconnects = disconnects;
+  ctx->handlers = GNUNET_MQ_copy_handlers (handlers);
+  ctx->ports = ports;
+  ctx->port_count = 0;
+  while (NULL != ctx->ports[ctx->port_count])
+    ctx->port_count++;
+
+  GNUNET_TESTBED_test_run (testname,
+                           cfgfile,
+                           num_peers,
+                           0LL, NULL, NULL,
+                           &cadet_test_run, ctx);
+}
+
+/* end of cadet_test_lib.c */
diff --git a/src/cadet/cadet_test_lib_new.h b/src/cadet/cadet_test_lib_new.h
new file mode 100644
index 000000000..4b3a6b18d
--- /dev/null
+++ b/src/cadet/cadet_test_lib_new.h
@@ -0,0 +1,106 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2012,2017 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 cadet/cadet_test_lib.h
+ * @author Bartlomiej Polot
+ * @brief library for writing CADET tests
+ */
+#ifndef CADET_TEST_LIB_H
+#define CADET_TEST_LIB_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0                           /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+#include "gnunet_testbed_service.h"
+#include "gnunet_cadet_service.h"
+
+/**
+ * Test context for a CADET Test.
+ */
+struct GNUNET_CADET_TEST_Context;
+
+
+/**
+ * Main function of a CADET test.
+ *
+ * @param cls Closure.
+ * @param ctx Argument to give to GNUNET_CADET_TEST_cleanup on test end.
+ * @param num_peers Number of peers that are running.
+ * @param peers Array of peers.
+ * @param cadets Handle to each of the CADETs of the peers.
+ */
+typedef void (*GNUNET_CADET_TEST_AppMain) (void *cls,
+                                          struct GNUNET_CADET_TEST_Context *ctx,
+                                          unsigned int num_peers,
+                                          struct GNUNET_TESTBED_Peer **peers,
+                                          struct GNUNET_CADET_Handle **cadets);
+
+
+/**
+ * Run a test using the given name, configuration file and number of peers.
+ * All cadet callbacks will receive the peer number (long) as the closure.
+ *
+ * @param testname Name of the test (for logging).
+ * @param cfgfile Name of the configuration file.
+ * @param num_peers Number of peers to start.
+ * @param tmain Main function to run once the testbed is ready.
+ * @param tmain_cls Closure for @a tmain.
+ * @param connects Handler for incoming channels.
+ * @param window_changes Handler for the window size change notification.
+ * @param disconnects Cleaner for destroyed incoming channels.
+ * @param handlers Message handlers.
+ * @param ports Ports the peers offer, NULL-terminated.
+ */
+void
+GNUNET_CADET_TEST_ruN (const char *testname,
+                       const char *cfgfile,
+                       unsigned int num_peers,
+                       GNUNET_CADET_TEST_AppMain tmain,
+                       void *tmain_cls,
+                       GNUNET_CADET_ConnectEventHandler connects,
+                       GNUNET_CADET_WindowSizeEventHandler window_changes,
+                       GNUNET_CADET_DisconnectEventHandler disconnects,
+                       struct GNUNET_MQ_MessageHandler *handlers,
+                       const struct GNUNET_HashCode **ports);
+
+/**
+ * Clean up the testbed.
+ *
+ * @param ctx handle for the testbed
+ */
+void
+GNUNET_CADET_TEST_cleanup (struct GNUNET_CADET_TEST_Context *ctx);
+
+
+#if 0                           /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+
+/* ifndef CADET_TEST_LIB_H */
+#endif
diff --git a/src/cadet/test_cadet.c b/src/cadet/test_cadet.c
index f2e639e7a..e57c01be2 100644
--- a/src/cadet/test_cadet.c
+++ b/src/cadet/test_cadet.c
@@ -593,8 +593,8 @@ tmt_rdy (void *cls, size_t size, void *buf)
                 "sending initializer\n");
     msg_size = size_payload + 1000;
     msg->size = htons (msg_size);
-  if (SPEED_ACK == test)
-      data_sent++;
+    if (SPEED_ACK == test)
+        data_sent++;
   }
   else if ( (SPEED == test) ||
             (SPEED_ACK == test) )
diff --git a/src/cadet/test_cadet_new.c b/src/cadet/test_cadet_new.c
new file mode 100644
index 000000000..622e87ea1
--- /dev/null
+++ b/src/cadet/test_cadet_new.c
@@ -0,0 +1,1049 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2011, 2017 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 cadet/test_cadet_mq.c
+ * @author Bart Polot
+ * @author Christian Grothoff
+ * @brief Test for the cadet service using mq API.
+ */
+#include <stdio.h>
+#include "platform.h"
+#include "cadet_test_lib_new.h"
+#include "gnunet_cadet_service.h"
+#include "gnunet_statistics_service.h"
+#include <gauger.h>
+
+
+/**
+ * Ugly workaround to unify data handlers on incoming and outgoing channels.
+ */
+struct CadetTestChannelWrapper
+{
+  /**
+   * Channel pointer.
+   */
+  struct GNUNET_CADET_Channel *ch;
+};
+
+/**
+ * How many messages to send
+ */
+#define TOTAL_PACKETS 500       /* Cannot exceed 64k! */
+
+/**
+ * How long until we give up on connecting the peers?
+ */
+#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 120)
+
+/**
+ * Time to wait for stuff that should be rather fast
+ */
+#define SHORT_TIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 20)
+
+/**
+ * DIFFERENT TESTS TO RUN
+ */
+#define SETUP 0
+#define FORWARD 1
+#define KEEPALIVE 2
+#define SPEED 3
+#define SPEED_ACK 4
+#define SPEED_REL 8
+#define P2P_SIGNAL 10
+
+/**
+ * Which test are we running?
+ */
+static int test;
+
+/**
+ * String with test name
+ */
+static char *test_name;
+
+/**
+ * Flag to send traffic leaf->root in speed tests to test BCK_ACK logic.
+ */
+static int test_backwards = GNUNET_NO;
+
+/**
+ * How many events have happened
+ */
+static int ok;
+
+/**
+ * Number of events expected to conclude the test successfully.
+ */
+static int ok_goal;
+
+/**
+ * Size of each test packet's payload
+ */
+static size_t size_payload = sizeof (uint32_t);
+
+/**
+ * Operation to get peer ids.
+ */
+static struct GNUNET_TESTBED_Operation *t_op[2];
+
+/**
+ * Peer ids.
+ */
+static struct GNUNET_PeerIdentity *p_id[2];
+
+/**
+ * Port ID
+ */
+static struct GNUNET_HashCode port;
+
+/**
+ * Peer ids counter.
+ */
+static unsigned int p_ids;
+
+/**
+ * Is the setup initialized?
+ */
+static int initialized;
+
+/**
+ * Number of payload packes sent.
+ */
+static int data_sent;
+
+/**
+ * Number of payload packets received.
+ */
+static int data_received;
+
+/**
+ * Number of payload packed acknowledgements sent.
+ */
+static int ack_sent;
+
+/**
+ * Number of payload packed explicitly (app level) acknowledged.
+ */
+static int ack_received;
+
+/**
+ * Total number of peers asked to run.
+ */
+static unsigned long long peers_requested;
+
+/**
+ * Number of currently running peers (should be same as @c peers_requested).
+ */
+static unsigned long long peers_running;
+
+/**
+ * Test context (to shut down).
+ */
+struct GNUNET_CADET_TEST_Context *test_ctx;
+
+/**
+ * Task called to disconnect peers.
+ */
+static struct GNUNET_SCHEDULER_Task *disconnect_task;
+
+/**
+ * Task To perform tests
+ */
+static struct GNUNET_SCHEDULER_Task *test_task;
+
+/**
+ * Task runnining #send_next_msg().
+ */
+static struct GNUNET_SCHEDULER_Task *send_next_msg_task;
+
+/**
+ * Cadet handle for the root peer
+ */
+static struct GNUNET_CADET_Handle *h1;
+
+/**
+ * Cadet handle for the first leaf peer
+ */
+static struct GNUNET_CADET_Handle *h2;
+
+/**
+ * Channel handle for the root peer
+ */
+static struct GNUNET_CADET_Channel *outgoing_ch;
+
+/**
+ * Channel handle for the dest peer
+ */
+static struct GNUNET_CADET_Channel *incoming_ch;
+
+/**
+ * Time we started the data transmission (after channel has been established
+ * and initilized).
+ */
+static struct GNUNET_TIME_Absolute start_time;
+
+/**
+ * Peers handle.
+ */
+static struct GNUNET_TESTBED_Peer **testbed_peers;
+
+/**
+ * Statistics operation handle.
+ */
+static struct GNUNET_TESTBED_Operation *stats_op;
+
+/**
+ * Keepalives sent.
+ */
+static unsigned int ka_sent;
+
+/**
+ * Keepalives received.
+ */
+static unsigned int ka_received;
+
+/**
+ * How many messages were dropped by CADET because of full buffers?
+ */
+static unsigned int msg_dropped;
+
+
+/******************************************************************************/
+
+
+/******************************************************************************/
+
+
+/**
+ * Get the channel considered as the "target" or "receiver", depending on
+ * the test type and size.
+ *
+ * @return Channel handle of the target client, either 0 (for backward tests)
+ *         or the last peer in the line (for other tests).
+ */
+static struct GNUNET_CADET_Channel *
+get_target_channel ()
+{
+  if (SPEED == test && GNUNET_YES == test_backwards)
+    return outgoing_ch;
+  else
+    return incoming_ch;
+}
+
+
+/**
+ * Show the results of the test (banwidth acheived) and log them to GAUGER
+ */
+static void
+show_end_data (void)
+{
+  static struct GNUNET_TIME_Absolute end_time;
+  static struct GNUNET_TIME_Relative total_time;
+
+  end_time = GNUNET_TIME_absolute_get ();
+  total_time = GNUNET_TIME_absolute_get_difference (start_time, end_time);
+  FPRINTF (stderr, "\nResults of test \"%s\"\n", test_name);
+  FPRINTF (stderr, "Test time %s\n",
+           GNUNET_STRINGS_relative_time_to_string (total_time, GNUNET_YES));
+  FPRINTF (stderr, "Test bandwidth: %f kb/s\n", 4 * TOTAL_PACKETS * 1.0 / (total_time.rel_value_us / 1000));    // 4bytes * ms
+  FPRINTF (stderr, "Test throughput: %f packets/s\n\n", TOTAL_PACKETS * 1000.0 / (total_time.rel_value_us / 1000));     // packets * ms
+  GAUGER ("CADET", test_name,
+          TOTAL_PACKETS * 1000.0 / (total_time.rel_value_us / 1000),
+          "packets/s");
+}
+
+
+/**
+ * Disconnect from cadet services af all peers, call shutdown.
+ *
+ * @param cls Closure (line number from which termination was requested).
+ * @param tc Task Context.
+ */
+static void
+disconnect_cadet_peers (void *cls)
+{
+  long line = (long) cls;
+  unsigned int i;
+
+  disconnect_task = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "disconnecting cadet service of peers, called from line %ld\n",
+              line);
+  for (i = 0; i < 2; i++)
+  {
+    GNUNET_TESTBED_operation_done (t_op[i]);
+  }
+  if (NULL != outgoing_ch)
+  {
+    GNUNET_CADET_channel_destroy (outgoing_ch);
+    outgoing_ch = NULL;
+  }
+  if (NULL != incoming_ch)
+  {
+    GNUNET_CADET_channel_destroy (incoming_ch);
+    incoming_ch = NULL;
+  }
+  GNUNET_CADET_TEST_cleanup (test_ctx);
+  GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Shut down peergroup, clean up.
+ *
+ * @param cls Closure (unused).
+ * @param tc Task Context.
+ */
+static void
+shutdown_task (void *cls)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Ending test.\n");
+  if (NULL != send_next_msg_task)
+  {
+    GNUNET_SCHEDULER_cancel (send_next_msg_task);
+    send_next_msg_task = NULL;
+  }
+  if (NULL != test_task)
+  {
+    GNUNET_SCHEDULER_cancel (test_task);
+    test_task = NULL;
+  }
+  if (NULL != disconnect_task)
+  {
+    GNUNET_SCHEDULER_cancel (disconnect_task);
+    disconnect_task =
+        GNUNET_SCHEDULER_add_now (&disconnect_cadet_peers, (void *) __LINE__);
+  }
+}
+
+
+/**
+ * Stats callback. Finish the stats testbed operation and when all stats have
+ * been iterated, shutdown the test.
+ *
+ * @param cls Closure (line number from which termination was requested).
+ * @param op the operation that has been finished
+ * @param emsg error message in case the operation has failed; will be NULL if
+ *          operation has executed successfully.
+ */
+static void
+stats_cont (void *cls, struct GNUNET_TESTBED_Operation *op, const char *emsg)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO, " KA sent: %u, KA received: %u\n",
+              ka_sent, ka_received);
+  if ((KEEPALIVE == test) && ((ka_sent < 2) || (ka_sent > ka_received + 1)))
+  {
+    GNUNET_break (0);
+    ok--;
+  }
+  GNUNET_TESTBED_operation_done (stats_op);
+
+  if (NULL != disconnect_task)
+    GNUNET_SCHEDULER_cancel (disconnect_task);
+  disconnect_task = GNUNET_SCHEDULER_add_now (&disconnect_cadet_peers, cls);
+}
+
+
+/**
+ * Process statistic values.
+ *
+ * @param cls closure (line number, unused)
+ * @param peer the peer the statistic belong to
+ * @param subsystem name of subsystem that created the statistic
+ * @param name the name of the datum
+ * @param value the current value
+ * @param is_persistent #GNUNET_YES if the value is persistent, #GNUNET_NO if not
+ * @return #GNUNET_OK to continue, #GNUNET_SYSERR to abort iteration
+ */
+static int
+stats_iterator (void *cls, const struct GNUNET_TESTBED_Peer *peer,
+                const char *subsystem, const char *name, uint64_t value,
+                int is_persistent)
+{
+  static const char *s_sent = "# keepalives sent";
+  static const char *s_recv = "# keepalives received";
+  static const char *rdrops = "# messages dropped due to full buffer";
+  static const char *cdrops = "# messages dropped due to slow client";
+  uint32_t i;
+
+  i = GNUNET_TESTBED_get_index (peer);
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "STATS PEER %u - %s [%s]: %llu\n", i,
+              subsystem, name, (unsigned long long) value);
+  if (0 == strncmp (s_sent, name, strlen (s_sent)) && 0 == i)
+    ka_sent = value;
+  if (0 == strncmp (s_recv, name, strlen (s_recv)) && peers_requested - 1 == i)
+    ka_received = value;
+  if (0 == strncmp (rdrops, name, strlen (rdrops)))
+    msg_dropped += value;
+  if (0 == strncmp (cdrops, name, strlen (cdrops)))
+    msg_dropped += value;
+
+  return GNUNET_OK;
+}
+
+
+/**
+ * Task to gather all statistics.
+ *
+ * @param cls Closure (line from which the task was scheduled).
+ */
+static void
+gather_stats_and_exit (void *cls)
+{
+  long l = (long) cls;
+
+  disconnect_task = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "gathering statistics from line %ld\n",
+              l);
+  if (NULL != outgoing_ch)
+  {
+    GNUNET_CADET_channel_destroy (outgoing_ch);
+    outgoing_ch = NULL;
+  }
+  stats_op = GNUNET_TESTBED_get_statistics (peers_running,
+                                            testbed_peers,
+                                            "cadet",
+                                            NULL,
+                                            &stats_iterator,
+                                            stats_cont,
+                                            cls);
+}
+
+
+
+/**
+ * Abort test: schedule disconnect and shutdown immediately
+ *
+ * @param line Line in the code the abort is requested from (__LINE__).
+ */
+static void
+abort_test (long line)
+{
+  if (NULL != disconnect_task)
+  {
+    GNUNET_SCHEDULER_cancel (disconnect_task);
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Aborting test from %ld\n", line);
+    disconnect_task =
+        GNUNET_SCHEDULER_add_now (&disconnect_cadet_peers, (void *) line);
+  }
+}
+
+
+/**
+ * Send a message on the channel with the appropriate size and payload.
+ *
+ * Update the appropriate *_sent counter.
+ *
+ * @param channel Channel to send the message on.
+ */
+static void
+send_test_message (struct GNUNET_CADET_Channel *channel)
+{
+  struct GNUNET_MQ_Envelope *env;
+  struct GNUNET_MessageHeader *msg;
+  uint32_t *data;
+  int *counter;
+  int size;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Sending test message on channel %p\n",
+              channel);
+  size = size_payload;
+  if (GNUNET_NO == initialized)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending INITIALIZER\n");
+    size += 1000;
+    counter = &data_sent;
+    if (SPEED_ACK == test) // FIXME unify SPEED_ACK with an initializer
+        data_sent++;
+  }
+  else if (SPEED == test || SPEED_ACK == test)
+  {
+    counter = get_target_channel() == channel ? &ack_sent : &data_sent;
+    size += *counter;
+    *counter = *counter + 1;
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Sending message %u\n", *counter);
+  }
+  else
+  {
+    counter =  &ack_sent;
+  }
+  env = GNUNET_MQ_msg_extra (msg, size, GNUNET_MESSAGE_TYPE_DUMMY);
+
+  data = (uint32_t *) &msg[1];
+  *data = htonl (*counter);
+  GNUNET_MQ_send (GNUNET_CADET_get_mq (channel), env);
+}
+
+/**
+ * Task to request a new data transmission in a SPEED test, without waiting
+ * for previous messages to be sent/arrrive.
+ *
+ * @param cls Closure (unused).
+ */
+static void
+send_next_msg (void *cls)
+{
+  struct GNUNET_CADET_Channel *channel;
+
+  send_next_msg_task = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending next message: %d\n", data_sent);
+
+  channel = GNUNET_YES == test_backwards ? incoming_ch : outgoing_ch;
+  GNUNET_assert (NULL != channel);
+  GNUNET_assert (SPEED == test);
+  send_test_message (channel);
+  if (data_sent < TOTAL_PACKETS)
+  {
+    /* SPEED test: Send all messages as soon as possible */
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                "Scheduling message %d\n",
+                data_sent + 1);
+    send_next_msg_task = GNUNET_SCHEDULER_add_now (&send_next_msg, NULL);
+  }
+}
+
+
+/**
+ * Every few messages cancel the timeout task and re-schedule it again, to
+ * avoid timing out when traffic keeps coming.
+ *
+ * @param line Code line number to log if a timeout occurs.
+ */
+static void
+reschedule_timeout_task (long line)
+{
+  if ((ok % 10) == 0)
+  {
+    if (NULL != disconnect_task)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                  " reschedule timeout every 10 messages\n");
+      GNUNET_SCHEDULER_cancel (disconnect_task);
+      disconnect_task = GNUNET_SCHEDULER_add_delayed (SHORT_TIME,
+                                                      &gather_stats_and_exit,
+                                                      (void *) line);
+    }
+  }
+}
+
+
+/**
+ * Check if payload is sane (size contains payload).
+ *
+ * @param cls should match #ch
+ * @param message The actual message.
+ * @return #GNUNET_OK to keep the channel open,
+ *         #GNUNET_SYSERR to close it (signal serious error).
+ */
+static int
+check_data (void *cls, const struct GNUNET_MessageHeader *message)
+{
+  if (sizeof (struct GNUNET_MessageHeader) >= ntohs (message->size))
+    return GNUNET_SYSERR;
+  return GNUNET_OK;             /* all is well-formed */
+}
+
+
+/**
+ * Function is called whenever a message is received.
+ *
+ * @param cls closure (set from GNUNET_CADET_connect(), peer number)
+ * @param message the actual message
+ */
+static void
+handle_data (void *cls, const struct GNUNET_MessageHeader *message)
+{
+  struct CadetTestChannelWrapper *ch = cls;
+  struct GNUNET_CADET_Channel *channel = ch->ch;
+  uint32_t *data;
+  uint32_t payload;
+  int *counter;
+
+  ok++;
+  counter = get_target_channel () == channel ? &data_received : &ack_received;
+
+  reschedule_timeout_task ((long) __LINE__);
+
+  if (channel == outgoing_ch)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Root client got a message!\n");
+  }
+  else if (channel == incoming_ch)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Leaf client got a message.\n");
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unknown channel %p.\n", channel);
+    GNUNET_assert (0);
+  }
+
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO, " ok: (%d/%d)\n", ok, ok_goal);
+  data = (uint32_t *) &message[1];
+  payload = ntohl (*data);
+  if (payload == *counter)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO, " payload as expected: %u\n", payload);
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                " payload %u, expected: %u\n",
+                payload, *counter);
+  }
+
+  if (GNUNET_NO == initialized)
+  {
+    initialized = GNUNET_YES;
+    start_time = GNUNET_TIME_absolute_get ();
+    if (SPEED == test)
+    {
+      GNUNET_assert (incoming_ch == channel);
+      send_next_msg_task = GNUNET_SCHEDULER_add_now (&send_next_msg, NULL);
+      return;
+    }
+  }
+
+  (*counter)++;
+  if (get_target_channel () == channel) /* Got "data" */
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO, " received data %u\n", data_received);
+    if (SPEED != test || (ok_goal - 2) == ok)
+    {
+      /* Send ACK */
+      send_test_message (channel);
+      return;
+    }
+    else
+    {
+      if (data_received < TOTAL_PACKETS)
+        return;
+    }
+  }
+  else /* Got "ack" */
+  {
+    if (SPEED_ACK == test || SPEED == test)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_INFO, " received ack %u\n", ack_received);
+      /* Send more data */
+      send_test_message (channel);
+      if (ack_received < TOTAL_PACKETS && SPEED != test)
+        return;
+      if (ok == 2 && SPEED == test)
+        return;
+      show_end_data ();
+    }
+    if (test == P2P_SIGNAL)
+    {
+      GNUNET_CADET_channel_destroy (incoming_ch);
+      incoming_ch = NULL;
+    }
+    else
+    {
+      GNUNET_CADET_channel_destroy (outgoing_ch);
+      outgoing_ch = NULL;
+    }
+  }
+}
+
+
+/**
+ * Method called whenever a peer connects to a port in MQ-based CADET.
+ *
+ * @param cls Closure from #GNUNET_CADET_open_porT (peer # as long).
+ * @param channel New handle to the channel.
+ * @param source Peer that started this channel.
+ * @return Closure for the incoming @a channel. It's given to:
+ *         - The #GNUNET_CADET_DisconnectEventHandler (given to
+ *           #GNUNET_CADET_open_porT) when the channel dies.
+ *         - Each the #GNUNET_MQ_MessageCallback handlers for each message
+ *           received on the @a channel.
+ */
+static void *
+connect_handler (void *cls, struct GNUNET_CADET_Channel *channel,
+                 const struct GNUNET_PeerIdentity *source)
+{
+  struct CadetTestChannelWrapper *ch;
+  long peer = (long) cls;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Incoming channel from %s to peer %ld\n",
+              GNUNET_i2s (source), peer);
+  ok++;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO, " ok: %d\n", ok);
+  if (peer == peers_requested - 1)
+  {
+    if (NULL != incoming_ch)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Duplicate incoming channel for client %lu\n", (long) cls);
+      GNUNET_assert (0);
+    }
+    incoming_ch = channel;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                "Incoming channel for unexpected peer #%lu\n", (long) cls);
+    GNUNET_assert (0);
+  }
+  if (NULL != disconnect_task)
+  {
+    GNUNET_SCHEDULER_cancel (disconnect_task);
+    disconnect_task =
+        GNUNET_SCHEDULER_add_delayed (SHORT_TIME, &gather_stats_and_exit,
+                                      (void *) __LINE__);
+  }
+
+  /* TODO: cannot return channel as-is, in order to unify the data handlers */
+  ch = GNUNET_new (struct CadetTestChannelWrapper);
+  ch->ch = channel;
+
+  return ch;
+}
+
+
+/**
+ * Function called whenever an MQ-channel is destroyed, even if the destruction
+ * was requested by #GNUNET_CADET_channel_destroy.
+ * It must NOT call #GNUNET_CADET_channel_destroy on the channel.
+ *
+ * It should clean up any associated state, including cancelling any pending
+ * transmission on this channel.
+ *
+ * @param cls Channel closure.
+ * @param channel Connection to the other end (henceforth invalid).
+ */
+static void
+disconnect_handler (void *cls, const struct GNUNET_CADET_Channel *channel)
+{
+  long i = (long) cls;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "Channel disconnected at %p\n", cls);
+  if (peers_running - 1 == i)
+  {
+    ok++;
+    GNUNET_break (channel == incoming_ch);
+    incoming_ch = NULL;
+  }
+  else if (0L == i)
+  {
+    if (P2P_SIGNAL == test)
+    {
+      ok++;
+    }
+    GNUNET_break (channel == outgoing_ch);
+    outgoing_ch = NULL;
+  }
+  else
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Unknown peer! %d\n", (int) i);
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO, " ok: %d\n", ok);
+
+  if (NULL != disconnect_task)
+  {
+    GNUNET_SCHEDULER_cancel (disconnect_task);
+    disconnect_task =
+        GNUNET_SCHEDULER_add_now (&gather_stats_and_exit, (void *) __LINE__);
+  }
+}
+
+
+/**
+ * START THE TESTCASE ITSELF, AS WE ARE CONNECTED TO THE CADET SERVICES.
+ *
+ * Testcase continues when the root receives confirmation of connected peers,
+ * on callback function ch.
+ *
+ * @param cls Closure (unused).
+ */
+static void
+start_test (void *cls)
+{
+  struct GNUNET_MQ_MessageHandler handlers[] = {
+    GNUNET_MQ_hd_var_size (data,
+                           GNUNET_MESSAGE_TYPE_DUMMY,
+                           struct GNUNET_MessageHeader,
+                           NULL),
+    GNUNET_MQ_handler_end ()
+  };
+  struct CadetTestChannelWrapper *ch;
+  enum GNUNET_CADET_ChannelOption flags;
+
+  test_task = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "start_test\n");
+  if (NULL != disconnect_task)
+  {
+    GNUNET_SCHEDULER_cancel (disconnect_task);
+    disconnect_task = NULL;
+  }
+
+  flags = GNUNET_CADET_OPTION_DEFAULT;
+  if (SPEED_REL == test)
+  {
+    test = SPEED;
+    flags |= GNUNET_CADET_OPTION_RELIABLE;
+  }
+
+  ch = GNUNET_new (struct CadetTestChannelWrapper);
+  outgoing_ch = GNUNET_CADET_channel_creatE (h1,
+                                             ch,
+                                             p_id[1],
+                                             &port,
+                                             flags,
+                                             NULL,
+                                             &disconnect_handler,
+                                             handlers);
+  ch->ch = outgoing_ch;
+
+  disconnect_task = GNUNET_SCHEDULER_add_delayed (SHORT_TIME,
+                                                  &gather_stats_and_exit,
+                                                  (void *) __LINE__);
+  if (KEEPALIVE == test)
+    return;                     /* Don't send any data. */
+
+
+  data_received = 0;
+  data_sent = 0;
+  ack_received = 0;
+  ack_sent = 0;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending data initializer...\n");
+  send_test_message (outgoing_ch);
+}
+
+
+/**
+ * Callback to be called when the requested peer information is available
+ *
+ * @param cls the closure from GNUNET_TESTBED_peer_get_information()
+ * @param op the operation this callback corresponds to
+ * @param pinfo the result; will be NULL if the operation has failed
+ * @param emsg error message if the operation has failed;
+ *             NULL if the operation is successfull
+ */
+static void
+pi_cb (void *cls, struct GNUNET_TESTBED_Operation *op,
+       const struct GNUNET_TESTBED_PeerInformation *pinfo, const char *emsg)
+{
+  long i = (long) cls;
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ID callback for %ld\n", i);
+
+  if ((NULL == pinfo) || (NULL != emsg))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "pi_cb: %s\n", emsg);
+    abort_test (__LINE__);
+    return;
+  }
+  p_id[i] = pinfo->result.id;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "  id: %s\n", GNUNET_i2s (p_id[i]));
+  p_ids++;
+  if (p_ids < 2)
+    return;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got all IDs, starting test\n");
+  test_task = GNUNET_SCHEDULER_add_now (&start_test, NULL);
+}
+
+
+/**
+ * test main: start test when all peers are connected
+ *
+ * @param cls Closure.
+ * @param ctx Argument to give to GNUNET_CADET_TEST_cleanup on test end.
+ * @param num_peers Number of peers that are running.
+ * @param peers Array of peers.
+ * @param cadets Handle to each of the CADETs of the peers.
+ */
+static void
+tmain (void *cls,
+       struct GNUNET_CADET_TEST_Context *ctx,
+       unsigned int num_peers,
+       struct GNUNET_TESTBED_Peer **peers,
+       struct GNUNET_CADET_Handle **cadets)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "test main\n");
+  ok = 0;
+  test_ctx = ctx;
+  peers_running = num_peers;
+  GNUNET_assert (peers_running == peers_requested);
+  testbed_peers = peers;
+  h1 = cadets[0];
+  h2 = cadets[num_peers - 1];
+  disconnect_task = GNUNET_SCHEDULER_add_delayed (SHORT_TIME,
+                                                  &disconnect_cadet_peers,
+                                                  (void *) __LINE__);
+  GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
+  t_op[0] = GNUNET_TESTBED_peer_get_information (peers[0],
+                                                 GNUNET_TESTBED_PIT_IDENTITY,
+                                                 &pi_cb,
+                                                 (void *) 0L);
+  t_op[1] = GNUNET_TESTBED_peer_get_information (peers[num_peers - 1],
+                                                 GNUNET_TESTBED_PIT_IDENTITY,
+                                                 &pi_cb,
+                                                 (void *) 1L);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "requested peer ids\n");
+}
+
+
+/**
+ * Main: start test
+ */
+int
+main (int argc, char *argv[])
+{
+  struct GNUNET_MQ_MessageHandler handlers[] = {
+    GNUNET_MQ_hd_var_size (data,
+                           GNUNET_MESSAGE_TYPE_DUMMY,
+                           struct GNUNET_MessageHeader,
+                           NULL),
+    GNUNET_MQ_handler_end ()
+  };
+
+  initialized = GNUNET_NO;
+  static const struct GNUNET_HashCode *ports[2];
+  const char *config_file;
+  char port_id[] = "test port";
+
+  GNUNET_CRYPTO_hash (port_id, sizeof (port_id), &port);
+
+  GNUNET_log_setup ("test", "DEBUG", NULL);
+  config_file = "test_cadet.conf";
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Start\n");
+
+  /* Find out requested size */
+  if (strstr (argv[0], "_2_") != NULL)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "DIRECT CONNECTIONs\n");
+    peers_requested = 2;
+  }
+  else if (strstr (argv[0], "_5_") != NULL)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "5 PEER LINE\n");
+    peers_requested = 5;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "SIZE UNKNOWN, USING 2\n");
+    peers_requested = 2;
+  }
+
+  /* Find out requested test */
+  if (strstr (argv[0], "_forward") != NULL)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "FORWARD\n");
+    test = FORWARD;
+    test_name = "unicast";
+    ok_goal = 4;
+  }
+  else if (strstr (argv[0], "_signal") != NULL)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "SIGNAL\n");
+    test = P2P_SIGNAL;
+    test_name = "signal";
+    ok_goal = 4;
+  }
+  else if (strstr (argv[0], "_speed_ack") != NULL)
+  {
+    /* Test is supposed to generate the following callbacks:
+     * 1 incoming channel (@dest)
+     * TOTAL_PACKETS received data packet (@dest)
+     * TOTAL_PACKETS received data packet (@orig)
+     * 1 received channel destroy (@dest)
+     */
+    ok_goal = TOTAL_PACKETS * 2 + 2;
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "SPEED_ACK\n");
+    test = SPEED_ACK;
+    test_name = "speed ack";
+  }
+  else if (strstr (argv[0], "_speed") != NULL)
+  {
+    /* Test is supposed to generate the following callbacks:
+     * 1 incoming channel (@dest)
+     * 1 initial packet (@dest)
+     * TOTAL_PACKETS received data packet (@dest)
+     * 1 received data packet (@orig)
+     * 1 received channel destroy (@dest)
+     */
+    ok_goal = TOTAL_PACKETS + 4;
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "SPEED\n");
+    if (strstr (argv[0], "_reliable") != NULL)
+    {
+      test = SPEED_REL;
+      test_name = "speed reliable";
+      config_file = "test_cadet_drop.conf";
+    }
+    else
+    {
+      test = SPEED;
+      test_name = "speed";
+    }
+  }
+  else if (strstr (argv[0], "_keepalive") != NULL)
+  {
+    test = KEEPALIVE;
+    /* Test is supposed to generate the following callbacks:
+     * 1 incoming channel (@dest)
+     * [wait]
+     * 1 received channel destroy (@dest)
+     */
+    ok_goal = 2;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "UNKNOWN\n");
+    test = SETUP;
+    ok_goal = 0;
+  }
+
+  if (strstr (argv[0], "backwards") != NULL)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "BACKWARDS (LEAF TO ROOT)\n");
+    test_backwards = GNUNET_YES;
+    GNUNET_asprintf (&test_name, "backwards %s", test_name);
+  }
+
+  p_ids = 0;
+  ports[0] = &port;
+  ports[1] = NULL;
+  GNUNET_CADET_TEST_ruN ("test_cadet_small",
+                         config_file,
+                         peers_requested,
+                         &tmain,
+                         NULL,        /* tmain cls */
+                         &connect_handler,
+                         NULL,
+                         &disconnect_handler,
+                         handlers,
+                         ports);
+  if (NULL != strstr (argv[0], "_reliable"))
+    msg_dropped = 0;            /* dropped should be retransmitted */
+
+  if (ok_goal > ok - msg_dropped)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "FAILED! (%d/%d)\n", ok, ok_goal);
+    return 1;
+  }
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "success\n");
+  return 0;
+}
+
+/* end of test_cadet.c */