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3 (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file transport/plugin_transport_http_client.c
23 * @brief http transport service plugin
24 * @author Matthias Wachs
27 #include "plugin_transport_http.h"
31 * Function to log curl debug messages with GNUNET_log
33 * @param type curl_infotype
40 client_log (CURL * curl, curl_infotype type, char *data, size_t size, void *cls)
42 if (type == CURLINFO_TEXT)
46 memcpy (text, data, size);
47 if (text[size - 1] == '\n')
52 text[size + 1] = '\0';
54 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client: %X - %s", cls, text);
61 client_send (struct Session *s, const char *msgbuf, size_t msgbuf_size)
67 * Task performing curl operations
68 * @param cls plugin as closure
69 * @param tc gnunet scheduler task context
72 client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
75 * Function setting up file descriptors and scheduling task to run
77 * @param plugin plugin as closure
78 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
81 client_schedule (struct Plugin *plugin)
87 struct GNUNET_NETWORK_FDSet *grs;
88 struct GNUNET_NETWORK_FDSet *gws;
91 struct GNUNET_TIME_Relative timeout;
93 /* Cancel previous scheduled task */
94 if (plugin->client_perform_task!= GNUNET_SCHEDULER_NO_TASK)
96 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
97 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
104 mret = curl_multi_fdset (plugin->client_mh, &rs, &ws, &es, &max);
105 if (mret != CURLM_OK)
107 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("%s failed at %s:%d: `%s'\n"),
108 "curl_multi_fdset", __FILE__, __LINE__,
109 curl_multi_strerror (mret));
110 return GNUNET_SYSERR;
112 mret = curl_multi_timeout (plugin->client_mh, &to);
114 timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5);
116 timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
117 if (mret != CURLM_OK)
119 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("%s failed at %s:%d: `%s'\n"),
120 "curl_multi_timeout", __FILE__, __LINE__,
121 curl_multi_strerror (mret));
122 return GNUNET_SYSERR;
125 grs = GNUNET_NETWORK_fdset_create ();
126 gws = GNUNET_NETWORK_fdset_create ();
127 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
128 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
130 plugin->client_perform_task =
131 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
132 GNUNET_SCHEDULER_NO_TASK,
138 GNUNET_NETWORK_fdset_destroy (gws);
139 GNUNET_NETWORK_fdset_destroy (grs);
145 * Task performing curl operations
146 * @param cls plugin as closure
147 * @param tc gnunet scheduler task context
150 client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
152 struct Plugin *plugin = cls;
153 static unsigned int handles_last_run;
157 GNUNET_assert (cls != NULL);
159 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
160 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
166 mret = curl_multi_perform (plugin->client_mh, &running);
170 while ((msg = curl_multi_info_read(plugin->client_mh, &msgs_left)))
172 CURL *easy_h = msg->easy_handle;
174 GNUNET_assert (easy_h != NULL);
176 GNUNET_assert (CURLE_OK == curl_easy_getinfo(easy_h, CURLINFO_PRIVATE, &s));
177 GNUNET_assert (s != NULL);
179 if (msg->msg == CURLMSG_DONE)
182 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
183 "Connection to '%s' %s ended\n", GNUNET_i2s(&s->target), http_plugin_address_to_string(plugin, s->addr, s->addrlen));
185 client_disconnect(s);
186 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,"Notifying about ended session to peer `%s' `%s'\n", GNUNET_i2s (&s->target), http_plugin_address_to_string (plugin, s->addr, s->addrlen));
187 if (s->msg_tk != NULL)
188 GNUNET_SERVER_mst_destroy (s->msg_tk);
189 notify_session_end (plugin, &s->target, s);
193 handles_last_run = running;
195 while (mret == CURLM_CALL_MULTI_PERFORM);
196 client_schedule (plugin);
200 client_disconnect (struct Session *s)
204 struct Plugin *plugin = s->plugin;
207 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
208 "Deleting outbound PUT session to peer `%s'\n",
209 GNUNET_i2s (&s->target));
212 if (s->client_put != NULL)
214 mret = curl_multi_remove_handle (plugin->client_mh, s->client_put);
215 if (mret != CURLM_OK)
217 curl_easy_cleanup (s->client_put);
221 curl_easy_cleanup (s->client_put);
222 s->client_put = NULL;
226 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
227 "Deleting outbound GET session to peer `%s'\n",
228 GNUNET_i2s (&s->target));
231 if (s->client_get != NULL)
233 mret = curl_multi_remove_handle (plugin->client_mh, s->client_get);
234 if (mret != CURLM_OK)
236 curl_easy_cleanup (s->client_get);
240 curl_easy_cleanup (s->client_get);
241 s->client_get = NULL;
244 plugin->cur_connections -= 2;
245 /* Re-schedule since handles have changed */
246 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
248 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
249 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
252 plugin->client_perform_task = GNUNET_SCHEDULER_add_now(client_run, plugin);
258 curl_receive_mst_cb (void *cls, void *client,
259 const struct GNUNET_MessageHeader *message)
261 struct Session *s = cls;
262 struct Plugin *plugin = s->plugin;
263 struct GNUNET_TRANSPORT_ATS_Information distance[2];
264 struct GNUNET_TIME_Relative delay;
266 distance[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
267 distance[0].value = htonl (1);
268 distance[1].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
269 distance[1].value = htonl (0);
271 delay = plugin->env->receive (plugin->env->cls, &s->target, message, (const struct GNUNET_TRANSPORT_ATS_Information*) &distance, 2, s, s->addr, s->addrlen);
272 s->delay = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), delay);
274 if (GNUNET_TIME_absolute_get().abs_value < s->delay.abs_value)
277 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Client: peer `%s' address `%s' next read delayed for %llu ms\n",
278 GNUNET_i2s (&s->target), GNUNET_a2s (s->addr, s->addrlen), delay);
284 * Callback method used with libcurl
285 * Method is called when libcurl needs to write data during sending
286 * @param stream pointer where to write data
287 * @param size size of an individual element
288 * @param nmemb count of elements that can be written to the buffer
289 * @param ptr destination pointer, passed to the libcurl handle
290 * @return bytes read from stream
293 curl_receive_cb (void *stream, size_t size, size_t nmemb, void *cls)
295 struct Session *s = cls;
296 struct Plugin *plugin = s->plugin;
298 if (GNUNET_TIME_absolute_get().abs_value < s->delay.abs_value)
301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
302 "Connection %X: no inbound bandwidth available! Next read was delayed for %llu ms\n",
303 s, GNUNET_TIME_absolute_get_difference(s->delay, GNUNET_TIME_absolute_get()).rel_value);
308 if (s->msg_tk == NULL)
309 s->msg_tk = GNUNET_SERVER_mst_create (&curl_receive_mst_cb, s);
311 GNUNET_SERVER_mst_receive (s->msg_tk, s, stream, size * nmemb, GNUNET_NO,
315 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Received %u bytes from peer `%s'\n",
317 GNUNET_i2s (&s->target));
319 return (size * nmemb);
323 * Callback method used with libcurl
324 * Method is called when libcurl needs to read data during sending
325 * @param stream pointer where to write data
326 * @param size size of an individual element
327 * @param nmemb count of elements that can be written to the buffer
328 * @param ptr source pointer, passed to the libcurl handle
329 * @return bytes written to stream
332 curl_send_cb (void *stream, size_t size, size_t nmemb, void *ptr)
334 size_t bytes_sent = 0;
337 struct Session *ps = ptr;
338 struct HTTP_Message *msg = ps->pending_msgs_tail;
342 if (ps->send_active == GNUNET_NO)
343 return CURL_READFUNC_PAUSE;
344 if ((ps->pending_msgs_tail == NULL) && (ps->send_active == GNUNET_YES))
346 #if DEBUG_CONNECTIONS
347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
348 "Connection %X: No Message to send, pausing connection\n", ps);
350 ps->send_active = GNUNET_NO;
351 return CURL_READFUNC_PAUSE;
354 GNUNET_assert (msg != NULL);
357 if (msg->pos < msg->size)
359 /* data fit in buffer */
360 if ((msg->size - msg->pos) <= (size * nmemb))
362 len = (msg->size - msg->pos);
363 memcpy (stream, &msg->buf[msg->pos], len);
370 memcpy (stream, &msg->buf[msg->pos], len);
375 /* no data to send */
381 if (msg->pos == msg->size)
383 #if DEBUG_CONNECTIONS
384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
385 "Connection %X: Message with %u bytes sent, removing message from queue\n",
388 /* Calling transmit continuation */
389 if (NULL != ps->pending_msgs_tail->transmit_cont)
390 msg->transmit_cont (ps->pending_msgs_tail->transmit_cont_cls,
391 &(ps->peercontext)->identity, GNUNET_OK);
392 ps->queue_length_cur -= msg->size;
393 remove_http_message (ps, msg);
401 client_connect (struct Session *s)
403 struct Plugin *plugin = s->plugin;
409 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
410 "Initiating outbound session peer `%s'\n",
411 GNUNET_i2s (&s->target));
414 s->inbound = GNUNET_NO;
418 GNUNET_asprintf (&url, "%s%s;%u", http_plugin_address_to_string (plugin, s->addr, s->addrlen), GNUNET_h2s_full (&plugin->env->my_identity->hashPubKey),plugin->last_tag);
420 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
424 /* create get connection */
425 s->client_get = curl_easy_init ();
427 curl_easy_setopt (s->client_get, CURLOPT_VERBOSE, 1L);
428 curl_easy_setopt (s->client_get, CURLOPT_DEBUGFUNCTION, &client_log);
429 curl_easy_setopt (s->client_get, CURLOPT_DEBUGDATA, s->client_get);
432 curl_easy_setopt (s->client_get, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
433 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYPEER, 0);
434 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYHOST, 0);
436 curl_easy_setopt (s->client_get, CURLOPT_URL, url);
437 //curl_easy_setopt (s->client_get, CURLOPT_HEADERFUNCTION, &curl_get_header_cb);
438 //curl_easy_setopt (s->client_get, CURLOPT_WRITEHEADER, ps);
439 curl_easy_setopt (s->client_get, CURLOPT_READFUNCTION, curl_send_cb);
440 curl_easy_setopt (s->client_get, CURLOPT_READDATA, s);
441 curl_easy_setopt (s->client_get, CURLOPT_WRITEFUNCTION, curl_receive_cb);
442 curl_easy_setopt (s->client_get, CURLOPT_WRITEDATA, s);
443 curl_easy_setopt (s->client_get, CURLOPT_TIMEOUT_MS,
444 (long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
445 curl_easy_setopt (s->client_get, CURLOPT_PRIVATE, s);
446 curl_easy_setopt (s->client_get, CURLOPT_CONNECTTIMEOUT_MS,
447 (long) HTTP_NOT_VALIDATED_TIMEOUT.rel_value);
448 curl_easy_setopt (s->client_get, CURLOPT_BUFFERSIZE,
449 2 * GNUNET_SERVER_MAX_MESSAGE_SIZE);
451 curl_easy_setopt (ps->recv_endpoint, CURLOPT_TCP_NODELAY, 1);
454 /* create put connection */
455 s->client_put = curl_easy_init ();
457 curl_easy_setopt (s->client_put, CURLOPT_VERBOSE, 1L);
458 curl_easy_setopt (s->client_put, CURLOPT_DEBUGFUNCTION, &client_log);
459 curl_easy_setopt (s->client_put, CURLOPT_DEBUGDATA, s->client_put);
462 curl_easy_setopt (s->client_put, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
463 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYPEER, 0);
464 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYHOST, 0);
466 curl_easy_setopt (s->client_put, CURLOPT_URL, url);
467 curl_easy_setopt (s->client_put, CURLOPT_PUT, 1L);
468 //curl_easy_setopt (s->client_put, CURLOPT_HEADERFUNCTION, &curl_put_header_cb);
469 //curl_easy_setopt (s->client_put, CURLOPT_WRITEHEADER, ps);
470 curl_easy_setopt (s->client_put, CURLOPT_READFUNCTION, curl_send_cb);
471 curl_easy_setopt (s->client_put, CURLOPT_READDATA, s);
472 curl_easy_setopt (s->client_put, CURLOPT_WRITEFUNCTION, curl_receive_cb);
473 curl_easy_setopt (s->client_put, CURLOPT_WRITEDATA, s);
474 curl_easy_setopt (s->client_put, CURLOPT_TIMEOUT_MS,
475 (long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
476 curl_easy_setopt (s->client_put, CURLOPT_PRIVATE, s);
477 curl_easy_setopt (s->client_put, CURLOPT_CONNECTTIMEOUT_MS,
478 (long) HTTP_NOT_VALIDATED_TIMEOUT.rel_value);
479 curl_easy_setopt (s->client_put, CURLOPT_BUFFERSIZE,
480 2 * GNUNET_SERVER_MAX_MESSAGE_SIZE);
482 curl_easy_setopt (s->client_put, CURLOPT_TCP_NODELAY, 1);
487 mret = curl_multi_add_handle (plugin->client_mh, s->client_get);
488 if (mret != CURLM_OK)
490 curl_easy_cleanup (s->client_get);
495 mret = curl_multi_add_handle (plugin->client_mh, s->client_put);
496 if (mret != CURLM_OK)
498 curl_multi_remove_handle (plugin->client_mh, s->client_get);
499 curl_easy_cleanup (s->client_get);
500 curl_easy_cleanup (s->client_put);
505 /* Perform connect */
506 plugin->cur_connections += 2;
508 /* Re-schedule since handles have changed */
509 if (plugin->client_perform_task!= GNUNET_SCHEDULER_NO_TASK)
511 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
512 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
514 plugin->client_perform_task = GNUNET_SCHEDULER_add_now (client_run, plugin);
520 client_start (struct Plugin *plugin)
524 curl_global_init (CURL_GLOBAL_ALL);
525 plugin->client_mh = curl_multi_init ();
527 if (NULL == plugin->client_mh)
529 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
531 ("Could not initialize curl multi handle, failed to start %s plugin!\n"),
539 client_stop (struct Plugin *plugin)
541 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
543 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
544 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
547 curl_multi_cleanup (plugin->client_mh);
548 curl_global_cleanup ();
553 /* end of plugin_transport_http_client.c */