2 This file is part of GNUnet.
3 Copyright (C) 2008--2013 GNUnet e.V.
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
22 * @file testbed/testbed_api_barriers.c
23 * @brief API implementation for testbed barriers
24 * @author Sree Harsha Totakura <sreeharsha@totakura.in>
28 #include "gnunet_testbed_service.h"
29 #include "testbed_api.h"
30 #include "testbed_api_barriers.h"
35 #define LOG(type, ...) \
36 GNUNET_log_from (type, "testbed-api-barriers", __VA_ARGS__);
39 * Debug logging shorthand
41 #define LOG_DEBUG(...) \
42 LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__);
48 struct GNUNET_TESTBED_BarrierWaitHandle
51 * The name of the barrier
56 * Then configuration used for the client connection
58 struct GNUNET_CONFIGURATION_Handle *cfg;
61 * The client connection
63 struct GNUNET_CLIENT_Connection *conn;
68 struct GNUNET_CLIENT_TransmitHandle *tx;
71 * The message to transmit with tx
73 struct GNUNET_MessageHeader *msg;
76 * The barrier wait callback
78 GNUNET_TESTBED_barrier_wait_cb cb;
81 * The closure for the above callback
88 * Function to destroy barrier wait handle
90 * @param h the handle to destroy
93 destroy_handle (struct GNUNET_TESTBED_BarrierWaitHandle *h)
95 GNUNET_free (h->name);
97 GNUNET_CLIENT_notify_transmit_ready_cancel (h->tx);
99 GNUNET_CLIENT_disconnect (h->conn);
101 GNUNET_free (h->msg);
102 GNUNET_CONFIGURATION_destroy (h->cfg);
108 * Type of a function to call when we receive a message
112 * @param message received message; NULL on timeout or fatal error
115 receive_handler (void *cls,
116 const struct GNUNET_MessageHeader *message)
118 struct GNUNET_TESTBED_BarrierWaitHandle *h = cls;
119 const struct GNUNET_TESTBED_BarrierStatusMsg *msg;
127 if (GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS != ntohs (message->type))
132 msize = ntohs (message->size);
133 if (msize <= sizeof (struct GNUNET_TESTBED_BarrierStatusMsg))
138 msg = (const struct GNUNET_TESTBED_BarrierStatusMsg *) message;
139 switch (ntohs (msg->status))
141 case GNUNET_TESTBED_BARRIERSTATUS_ERROR:
143 case GNUNET_TESTBED_BARRIERSTATUS_INITIALISED:
144 GNUNET_break (0); /* FIXME */
146 case GNUNET_TESTBED_BARRIERSTATUS_CROSSED:
147 h->cb (h->cls, h->name, GNUNET_OK);
154 h->cb (h->cls, h->name, GNUNET_SYSERR);
162 * Function called to notify a client about the connection
163 * begin ready to queue more data. "buf" will be
164 * NULL and "size" zero if the connection was closed for
165 * writing in the meantime.
168 * @param size number of bytes available in buf
169 * @param buf where the callee should write the message
170 * @return number of bytes written to buf
173 transmit_notify (void *cls, size_t size, void *buf)
175 struct GNUNET_TESTBED_BarrierWaitHandle *h = cls;
179 if ((0 == size) || (NULL == buf))
184 msize = htons (h->msg->size);
185 GNUNET_assert (msize <= size);
186 (void) memcpy (buf, h->msg, msize);
187 GNUNET_free (h->msg);
189 GNUNET_CLIENT_receive (h->conn, &receive_handler, h, GNUNET_TIME_UNIT_FOREVER_REL);
195 * Wait for a barrier to be crossed. This function should be called by the
196 * peers which have been started by the testbed. If the peer is not started by
197 * testbed this function may return error
199 * @param name the name of the barrier
200 * @param cb the barrier wait callback
201 * @param cls the closure for the above callback
202 * @return barrier wait handle which can be used to cancel the waiting at
203 * anytime before the callback is called. NULL upon error.
205 struct GNUNET_TESTBED_BarrierWaitHandle *
206 GNUNET_TESTBED_barrier_wait (const char *name,
207 GNUNET_TESTBED_barrier_wait_cb cb,
210 struct GNUNET_TESTBED_BarrierWait *msg;
211 struct GNUNET_CONFIGURATION_Handle *cfg;
212 struct GNUNET_TESTBED_BarrierWaitHandle *h;
217 GNUNET_assert (NULL != cb);
218 GNUNET_assert (NULL != name);
219 cfg_filename = getenv (ENV_TESTBED_CONFIG);
220 if (NULL == cfg_filename)
222 LOG (GNUNET_ERROR_TYPE_ERROR, "Are you running under testbed?\n");
225 cfg = GNUNET_CONFIGURATION_create ();
226 if (GNUNET_OK != GNUNET_CONFIGURATION_load (cfg, cfg_filename))
228 LOG (GNUNET_ERROR_TYPE_ERROR, "Unable to load configuration from file `%s'\n",
230 GNUNET_CONFIGURATION_destroy (cfg);
233 h = GNUNET_new (struct GNUNET_TESTBED_BarrierWaitHandle);
234 h->name = GNUNET_strdup (name);
236 h->conn = GNUNET_CLIENT_connect ("testbed-barrier", h->cfg);
241 LOG (GNUNET_ERROR_TYPE_ERROR,
242 "Unable to connect to local testbed-barrier service\n");
246 name_len = strlen (name);
247 msize = sizeof (struct GNUNET_TESTBED_BarrierWait) + name_len;
248 msg = GNUNET_malloc (msize);
249 msg->header.type = htons (GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT);
250 msg->header.size = htons (msize);
251 (void) memcpy (msg->name, name, name_len);
252 h->msg = &msg->header;
254 GNUNET_CLIENT_notify_transmit_ready (h->conn, msize,
255 GNUNET_TIME_UNIT_FOREVER_REL,
264 * Cancel a barrier wait handle
266 * @param h the barrier wait handle
269 GNUNET_TESTBED_barrier_wait_cancel (struct GNUNET_TESTBED_BarrierWaitHandle *h)
274 /* end of testbed_api_barriers.c */