2 This file is part of GNUnet
3 (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
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., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_http_client.c
23 * @brief HTTP/S client transport plugin
24 * @author Matthias Wachs
28 #define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_https_client_init
29 #define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_https_client_done
31 #define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_http_client_init
32 #define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_http_client_done
35 #define VERBOSE_CURL GNUNET_YES
37 #define PUT_DISCONNECT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
39 #define ENABLE_PUT GNUNET_YES
40 #define ENABLE_GET GNUNET_YES
43 #include "gnunet_protocols.h"
44 #include "gnunet_common.h"
45 #include "gnunet_server_lib.h"
46 #include "gnunet_transport_plugin.h"
47 #include "plugin_transport_http_common.h"
48 #include <curl/curl.h>
52 * Encapsulation of all of the state of the plugin.
54 struct HTTP_Client_Plugin;
58 * Message to send using http
63 * next pointer for double linked list
65 struct HTTP_Message *next;
68 * previous pointer for double linked list
70 struct HTTP_Message *prev;
73 * buffer containing data to send
78 * amount of data already sent
88 * HTTP overhead required to send this message
94 * Continuation function to call once the transmission buffer
95 * has again space available. NULL if there is no
96 * continuation to call.
98 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
101 * Closure for transmit_cont.
103 void *transmit_cont_cls;
107 * Session handle for connections.
112 * To whom are we talking to (set to our identity
113 * if we are still waiting for the welcome message)
115 struct GNUNET_PeerIdentity target;
118 * Stored in a linked list.
120 struct Session *next;
123 * Stored in a linked list.
125 struct Session *prev;
128 * The URL to connect to
143 * ATS network type in NBO
145 uint32_t ats_address_network_type;
148 * Pointer to the global plugin struct.
150 struct HTTP_Client_Plugin *plugin;
153 * Was session given to transport service?
155 // int session_passed;
164 * Is the client PUT handle currently paused
169 * Is the client PUT handle disconnect in progress?
171 int put_tmp_disconnecting;
174 * Is the client PUT handle temporarily disconnected?
176 int put_tmp_disconnected;
179 * We received data to send while disconnecting, reconnect immediately
181 int put_reconnect_required;
184 * Client receive handle
189 * next pointer for double linked list
191 struct HTTP_Message *msg_head;
194 * previous pointer for double linked list
196 struct HTTP_Message *msg_tail;
199 * Message stream tokenizer for incoming data
201 struct GNUNET_SERVER_MessageStreamTokenizer *msg_tk;
204 * Session timeout task
206 GNUNET_SCHEDULER_TaskIdentifier put_disconnect_task;
209 * Session timeout task
211 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
214 * Task to wake up client receive handle when receiving is allowed again
216 GNUNET_SCHEDULER_TaskIdentifier recv_wakeup_task;
219 * Absolute time when to receive data again
220 * Used for receive throttling
222 struct GNUNET_TIME_Absolute next_receive;
227 * Encapsulation of all of the state of the plugin.
229 struct HTTP_Client_Plugin
234 struct GNUNET_TRANSPORT_PluginEnvironment *env;
237 * Linked list head of open sessions.
239 struct Session *head;
242 * Linked list tail of open sessions.
244 struct Session *tail;
257 * Maximum number of sockets the plugin can use
258 * Each http inbound /outbound connections are two connections
260 unsigned int max_connections;
263 * Current number of sockets the plugin can use
264 * Each http inbound /outbound connections are two connections
266 unsigned int cur_connections;
269 * Last used unique HTTP connection tag
286 CURLM *curl_multi_handle;
291 GNUNET_SCHEDULER_TaskIdentifier client_perform_task;
296 * Encapsulation of all of the state of the plugin.
298 struct HTTP_Client_Plugin *p;
302 * Start session timeout for a session
303 * @param s the session
306 client_start_session_timeout (struct Session *s);
310 * Increment session timeout due to activity for a session
311 * @param s the session
314 client_reschedule_session_timeout (struct Session *s);
318 * Cancel timeout for a session
319 * @param s the session
322 client_stop_session_timeout (struct Session *s);
326 * Function setting up file descriptors and scheduling task to run
328 * @param plugin plugin as closure
329 * @param now schedule task in 1ms, regardless of what curl may say
330 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
333 client_schedule (struct HTTP_Client_Plugin *plugin, int now);
336 client_connect_put (struct Session *s);
339 * Does a session s exists?
341 * @param plugin the plugin
342 * @param s desired session
343 * @return GNUNET_YES or GNUNET_NO
346 client_exist_session (struct HTTP_Client_Plugin *plugin, struct Session *s)
348 struct Session * head;
350 GNUNET_assert (NULL != plugin);
351 GNUNET_assert (NULL != s);
353 for (head = plugin->head; head != NULL; head = head->next)
363 * Function to log curl debug messages with GNUNET_log
366 * @param type curl_infotype
373 client_log (CURL * curl, curl_infotype type, char *data, size_t size, void *cls)
376 if ((type == CURLINFO_TEXT) || (type == CURLINFO_HEADER_IN) || (type == CURLINFO_HEADER_OUT))
384 case CURLINFO_HEADER_IN:
387 case CURLINFO_HEADER_OUT:
388 ttype = "HEADER_OUT";
394 memcpy (text, data, size);
395 if (text[size - 1] == '\n')
400 text[size + 1] = '\0';
403 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "transport-https_client",
404 "Connection %p %s: %s", cls, ttype, text);
406 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "transport-http_client",
407 "Connection %p %s: %s", cls, ttype, text);
416 * Function that can be used by the transport service to transmit
417 * a message using the plugin. Note that in the case of a
418 * peer disconnecting, the continuation MUST be called
419 * prior to the disconnect notification itself. This function
420 * will be called with this peer's HELLO message to initiate
421 * a fresh connection to another peer.
424 * @param s which session must be used
425 * @param msgbuf the message to transmit
426 * @param msgbuf_size number of bytes in 'msgbuf'
427 * @param priority how important is the message (most plugins will
428 * ignore message priority and just FIFO)
429 * @param to how long to wait at most for the transmission (does not
430 * require plugins to discard the message after the timeout,
431 * just advisory for the desired delay; most plugins will ignore
433 * @param cont continuation to call once the message has
434 * been transmitted (or if the transport is ready
435 * for the next transmission call; or if the
436 * peer disconnected...); can be NULL
437 * @param cont_cls closure for cont
438 * @return number of bytes used (on the physical network, with overheads);
439 * -1 on hard errors (i.e. address invalid); 0 is a legal value
440 * and does NOT mean that the message was not transmitted (DV)
443 http_client_plugin_send (void *cls,
445 const char *msgbuf, size_t msgbuf_size,
446 unsigned int priority,
447 struct GNUNET_TIME_Relative to,
448 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
450 struct HTTP_Client_Plugin *plugin = cls;
451 struct HTTP_Message *msg;
454 GNUNET_assert (plugin != NULL);
455 GNUNET_assert (s != NULL);
457 /* lookup if session is really existing */
458 if (GNUNET_YES != client_exist_session (plugin, s))
461 return GNUNET_SYSERR;
464 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
465 "Session %p/connection %p: Sending message with %u to peer `%s' \n",
467 msgbuf_size, GNUNET_i2s (&s->target));
469 /* create new message and schedule */
470 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
472 msg->size = msgbuf_size;
474 msg->buf = (char *) &msg[1];
475 msg->transmit_cont = cont;
476 msg->transmit_cont_cls = cont_cls;
477 memcpy (msg->buf, msgbuf, msgbuf_size);
478 GNUNET_CONTAINER_DLL_insert_tail (s->msg_head, s->msg_tail, msg);
480 GNUNET_asprintf (&stat_txt, "# bytes currently in %s_client buffers", plugin->protocol);
481 GNUNET_STATISTICS_update (plugin->env->stats,
482 stat_txt, msgbuf_size, GNUNET_NO);
484 GNUNET_free (stat_txt);
486 if (GNUNET_YES == s->put_tmp_disconnecting)
488 /* PUT connection is currently getting disconnected */
489 s->put_reconnect_required = GNUNET_YES;
490 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
491 "Session %p/connection %jp: currently disconnecting, reconnecting immediately\n",
495 else if (GNUNET_YES == s->put_paused)
497 /* PUT connection was paused, unpause */
498 GNUNET_assert (s->put_disconnect_task != GNUNET_SCHEDULER_NO_TASK);
499 GNUNET_SCHEDULER_cancel (s->put_disconnect_task);
500 s->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
501 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
502 "Session %p/connection %p: unpausing connection\n",
504 s->put_paused = GNUNET_NO;
505 curl_easy_pause (s->client_put, CURLPAUSE_CONT);
507 else if (GNUNET_YES == s->put_tmp_disconnected)
509 /* PUT connection was disconnected, reconnect */
510 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
511 "Session %p: Reconnecting PUT connection\n",
513 s->put_tmp_disconnected = GNUNET_NO;
514 GNUNET_break (s->client_put == NULL);
515 if (GNUNET_SYSERR == client_connect_put (s))
517 return GNUNET_SYSERR;
521 client_schedule (s->plugin, GNUNET_YES);
522 client_reschedule_session_timeout (s);
530 * @param s the session to delete
533 client_delete_session (struct Session *s)
535 struct HTTP_Client_Plugin *plugin = s->plugin;
536 struct HTTP_Message *pos;
537 struct HTTP_Message *next;
539 client_stop_session_timeout (s);
541 if (GNUNET_SCHEDULER_NO_TASK != s->put_disconnect_task)
543 GNUNET_SCHEDULER_cancel (s->put_disconnect_task);
544 s->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
547 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
550 while (NULL != (pos = next))
553 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, pos);
554 if (pos->transmit_cont != NULL)
555 pos->transmit_cont (pos->transmit_cont_cls, &s->target, GNUNET_SYSERR,
556 pos->size, pos->pos + pos->overhead);
560 if (s->msg_tk != NULL)
562 GNUNET_SERVER_mst_destroy (s->msg_tk);
565 GNUNET_free (s->addr);
566 GNUNET_free (s->url);
573 * Disconnect a session
576 * @return GNUNET_OK on success, GNUNET_SYSERR on error
579 client_disconnect (struct Session *s)
581 struct HTTP_Client_Plugin *plugin = s->plugin;
582 struct HTTP_Message *msg;
583 struct HTTP_Message *t;
587 if (GNUNET_YES != client_exist_session (plugin, s))
590 return GNUNET_SYSERR;
593 if (s->client_put != NULL)
595 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
596 "Session %p/connection %p: disconnecting PUT connection to peer `%s'\n",
597 s, s->client_put, GNUNET_i2s (&s->target));
599 /* remove curl handle from multi handle */
600 mret = curl_multi_remove_handle (plugin->curl_multi_handle, s->client_put);
601 if (mret != CURLM_OK)
603 /* clean up easy handle, handle is now invalid and free'd */
607 curl_easy_cleanup (s->client_put);
608 s->client_put = NULL;
612 if (s->recv_wakeup_task != GNUNET_SCHEDULER_NO_TASK)
614 GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
615 s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
618 if (s->client_get != NULL)
620 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
621 "Session %p/connection %p: disconnecting GET connection to peer `%s'\n",
622 s, s->client_get, GNUNET_i2s (&s->target));
624 /* remove curl handle from multi handle */
625 mret = curl_multi_remove_handle (plugin->curl_multi_handle, s->client_get);
626 if (mret != CURLM_OK)
628 /* clean up easy handle, handle is now invalid and free'd */
632 curl_easy_cleanup (s->client_get);
633 s->client_get = NULL;
640 if (NULL != msg->transmit_cont)
641 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR,
642 msg->size, msg->pos + msg->overhead);
643 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
648 GNUNET_assert (plugin->cur_connections >= 2);
649 plugin->cur_connections -= 2;
650 GNUNET_STATISTICS_set (plugin->env->stats,
651 "# HTTP client sessions",
652 plugin->cur_connections,
655 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
656 "Session %p: notifying transport about ending session\n",s);
658 plugin->env->session_end (plugin->env->cls, &s->target, s);
659 client_delete_session (s);
661 /* Re-schedule since handles have changed */
662 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
664 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
665 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
667 client_schedule (plugin, GNUNET_YES);
674 * Function that can be used to force the plugin to disconnect
675 * from the given peer and cancel all previous transmissions
676 * (and their continuationc).
679 * @param target peer from which to disconnect
682 http_client_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
684 struct HTTP_Client_Plugin *plugin = cls;
685 struct Session *next = NULL;
686 struct Session *pos = NULL;
688 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
689 "Transport tells me to disconnect `%s'\n",
690 GNUNET_i2s (target));
693 while (NULL != (pos = next))
696 if (0 == memcmp (target, &pos->target, sizeof (struct GNUNET_PeerIdentity)))
698 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
699 "Disconnecting session %p to `%pos'\n",
700 pos, GNUNET_i2s (target));
701 GNUNET_assert (GNUNET_OK == client_disconnect (pos));
708 static struct Session *
709 client_lookup_session (struct HTTP_Client_Plugin *plugin,
710 const struct GNUNET_HELLO_Address *address)
714 for (pos = plugin->head; NULL != pos; pos = pos->next)
715 if ((0 == memcmp (&address->peer, &pos->target, sizeof (struct GNUNET_PeerIdentity))) &&
716 (address->address_length == pos->addrlen) &&
717 (0 == memcmp (address->address, pos->addr, pos->addrlen)))
723 client_put_disconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
725 struct Session *s = cls;
726 s->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
727 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
728 "Session %p/connection %p: will be disconnected due to no activity\n",
730 s->put_paused = GNUNET_NO;
731 s->put_tmp_disconnecting = GNUNET_YES;
732 curl_easy_pause (s->client_put, CURLPAUSE_CONT);
733 client_schedule (s->plugin, GNUNET_YES);
739 * Callback method used with libcurl
740 * Method is called when libcurl needs to read data during sending
742 * @param stream pointer where to write data
743 * @param size size of an individual element
744 * @param nmemb count of elements that can be written to the buffer
745 * @param cls source pointer, passed to the libcurl handle
746 * @return bytes written to stream, returning 0 will terminate connection!
749 client_send_cb (void *stream, size_t size, size_t nmemb, void *cls)
751 struct Session *s = cls;
752 struct HTTP_Client_Plugin *plugin = s->plugin;
753 struct HTTP_Message *msg = s->msg_head;
757 if (GNUNET_YES != client_exist_session (plugin, s))
762 if (GNUNET_YES == s->put_tmp_disconnecting)
765 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
766 "Session %p/connection %p: disconnect due to inactivity\n",
773 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
774 "Session %p/connection %p: nothing to send, suspending\n",
776 s->put_disconnect_task = GNUNET_SCHEDULER_add_delayed (PUT_DISCONNECT_TIMEOUT, &client_put_disconnect, s);
777 s->put_paused = GNUNET_YES;
778 return CURL_READFUNC_PAUSE;
781 GNUNET_assert (msg->pos < msg->size);
782 /* calculate how much fits in buffer */
783 len = GNUNET_MIN (msg->size - msg->pos,
785 memcpy (stream, &msg->buf[msg->pos], len);
787 if (msg->pos == msg->size)
789 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
790 "Session %p/connection %p: sent message with %u bytes sent, removing message from queue\n",
791 s, s->client_put, msg->size, msg->pos);
792 /* Calling transmit continuation */
793 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
794 if (NULL != msg->transmit_cont)
795 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_OK,
796 msg->size, msg->size + msg->overhead);
800 GNUNET_asprintf (&stat_txt, "# bytes currently in %s_client buffers", plugin->protocol);
801 GNUNET_STATISTICS_update (plugin->env->stats,
802 stat_txt, -len, GNUNET_NO);
803 GNUNET_free (stat_txt);
805 GNUNET_asprintf (&stat_txt, "# bytes transmitted via %s_client", plugin->protocol);
806 GNUNET_STATISTICS_update (plugin->env->stats,
807 stat_txt, len, GNUNET_NO);
808 GNUNET_free (stat_txt);
810 client_reschedule_session_timeout (s);
816 * Wake up a curl handle which was suspended
818 * @param cls the session
819 * @param tc task context
822 client_wake_up (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
824 struct Session *s = cls;
826 if (GNUNET_YES != client_exist_session(p, s))
831 s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
832 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
834 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
835 "Session %p/connection %p: Waking up GET handle\n", s, s->client_get);
836 if (s->client_get != NULL)
837 curl_easy_pause (s->client_get, CURLPAUSE_CONT);
842 * Callback for message stream tokenizer
844 * @param cls the session
845 * @param client not used
846 * @param message the message received
847 * @return always GNUNET_OK
850 client_receive_mst_cb (void *cls, void *client,
851 const struct GNUNET_MessageHeader *message)
853 struct Session *s = cls;
854 struct HTTP_Client_Plugin *plugin;
855 struct GNUNET_TIME_Relative delay;
856 struct GNUNET_ATS_Information atsi[2];
858 if (GNUNET_YES != client_exist_session(p, s))
865 atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
866 atsi[0].value = htonl (1);
867 atsi[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
868 atsi[1].value = s->ats_address_network_type;
869 GNUNET_break (s->ats_address_network_type != ntohl (GNUNET_ATS_NET_UNSPECIFIED));
871 delay = s->plugin->env->receive (plugin->env->cls, &s->target, message,
872 (const struct GNUNET_ATS_Information *) &atsi, 2,
873 s, s->addr, s->addrlen);
875 GNUNET_asprintf (&stat_txt, "# bytes received via %s_client", plugin->protocol);
876 GNUNET_STATISTICS_update (plugin->env->stats,
877 stat_txt, ntohs(message->size), GNUNET_NO);
878 GNUNET_free (stat_txt);
881 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), delay);
883 if (GNUNET_TIME_absolute_get ().abs_value < s->next_receive.abs_value)
886 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
887 "Client: peer `%s' address `%s' next read delayed for %llu ms\n",
888 GNUNET_i2s (&s->target), GNUNET_a2s (s->addr, s->addrlen),
891 client_reschedule_session_timeout (s);
897 * Callback method used with libcurl when data for a PUT connection are
898 * received. We do not expect data here, so we just dismiss it
900 * @param stream pointer where to write data
901 * @param size size of an individual element
902 * @param nmemb count of elements that can be written to the buffer
903 * @param cls destination pointer, passed to the libcurl handle
904 * @return bytes read from stream
907 client_receive_put (void *stream, size_t size, size_t nmemb, void *cls)
914 * Callback method used with libcurl when data for a GET connection are
915 * received. Forward to MST
917 * @param stream pointer where to write data
918 * @param size size of an individual element
919 * @param nmemb count of elements that can be written to the buffer
920 * @param cls destination pointer, passed to the libcurl handle
921 * @return bytes read from stream
924 client_receive (void *stream, size_t size, size_t nmemb, void *cls)
926 struct Session *s = cls;
927 struct GNUNET_TIME_Absolute now;
928 size_t len = size * nmemb;
929 struct HTTP_Client_Plugin *plugin = s->plugin;
931 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
932 "Session %p / connection %p: Received %u bytes from peer `%s'\n",
934 len, GNUNET_i2s (&s->target));
935 now = GNUNET_TIME_absolute_get ();
936 if (now.abs_value < s->next_receive.abs_value)
938 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
939 struct GNUNET_TIME_Relative delta =
940 GNUNET_TIME_absolute_get_difference (now, s->next_receive);
941 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
942 "Session %p / connection %p: No inbound bandwidth available! Next read was delayed for %llu ms\n",
943 s, s->client_get, delta.rel_value);
944 if (s->recv_wakeup_task != GNUNET_SCHEDULER_NO_TASK)
946 GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
947 s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
949 s->recv_wakeup_task =
950 GNUNET_SCHEDULER_add_delayed (delta, &client_wake_up, s);
951 return CURL_WRITEFUNC_PAUSE;
953 if (NULL == s->msg_tk)
954 s->msg_tk = GNUNET_SERVER_mst_create (&client_receive_mst_cb, s);
955 GNUNET_SERVER_mst_receive (s->msg_tk, s, stream, len, GNUNET_NO, GNUNET_NO);
961 * Task performing curl operations
963 * @param cls plugin as closure
964 * @param tc gnunet scheduler task context
967 client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
971 * Function setting up file descriptors and scheduling task to run
973 * @param plugin plugin as closure
974 * @param now schedule task in 1ms, regardless of what curl may say
975 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
978 client_schedule (struct HTTP_Client_Plugin *plugin, int now)
984 struct GNUNET_NETWORK_FDSet *grs;
985 struct GNUNET_NETWORK_FDSet *gws;
988 struct GNUNET_TIME_Relative timeout;
990 /* Cancel previous scheduled task */
991 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
993 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
994 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1000 mret = curl_multi_fdset (plugin->curl_multi_handle, &rs, &ws, &es, &max);
1001 if (mret != CURLM_OK)
1003 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("%s failed at %s:%d: `%s'\n"),
1004 "curl_multi_fdset", __FILE__, __LINE__,
1005 curl_multi_strerror (mret));
1006 return GNUNET_SYSERR;
1008 mret = curl_multi_timeout (plugin->curl_multi_handle, &to);
1010 timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1);
1012 timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
1013 if (now == GNUNET_YES)
1014 timeout = GNUNET_TIME_UNIT_MILLISECONDS;
1016 if (mret != CURLM_OK)
1018 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("%s failed at %s:%d: `%s'\n"),
1019 "curl_multi_timeout", __FILE__, __LINE__,
1020 curl_multi_strerror (mret));
1021 return GNUNET_SYSERR;
1024 grs = GNUNET_NETWORK_fdset_create ();
1025 gws = GNUNET_NETWORK_fdset_create ();
1026 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1027 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1029 plugin->client_perform_task =
1030 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1032 &client_run, plugin);
1033 GNUNET_NETWORK_fdset_destroy (gws);
1034 GNUNET_NETWORK_fdset_destroy (grs);
1040 * Task performing curl operations
1042 * @param cls plugin as closure
1043 * @param tc gnunet scheduler task context
1046 client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1048 struct HTTP_Client_Plugin *plugin = cls;
1050 long http_statuscode;
1053 GNUNET_assert (cls != NULL);
1055 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1056 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1062 mret = curl_multi_perform (plugin->curl_multi_handle, &running);
1067 while ((msg = curl_multi_info_read (plugin->curl_multi_handle, &msgs_left)))
1069 CURL *easy_h = msg->easy_handle;
1070 struct Session *s = NULL;
1071 char *d = (char *) s;
1076 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1077 "Client: connection to ended with reason %i: `%s', %i handles running\n",
1079 curl_easy_strerror (msg->data.result), running);
1083 GNUNET_assert (CURLE_OK ==
1084 curl_easy_getinfo (easy_h, CURLINFO_PRIVATE, &d));
1085 s = (struct Session *) d;
1087 if (GNUNET_YES != client_exist_session(plugin, s))
1093 GNUNET_assert (s != NULL);
1094 if (msg->msg == CURLMSG_DONE)
1096 curl_easy_getinfo (easy_h, CURLINFO_RESPONSE_CODE, &http_statuscode);
1097 if (easy_h == s->client_put)
1099 if ((0 != msg->data.result) || (http_statuscode != 200))
1101 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1102 "Session %p/connection %p: PUT connection to `%s' ended with status %i reason %i: `%s'\n",
1103 s, msg->easy_handle, GNUNET_i2s (&s->target),
1106 curl_easy_strerror (msg->data.result));
1109 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1110 "Session %p/connection %p: PUT connection to `%s' ended normal\n",
1111 s, msg->easy_handle, GNUNET_i2s (&s->target));
1112 if (s->client_get == NULL)
1114 /* Disconnect other transmission direction and tell transport */
1116 curl_multi_remove_handle (plugin->curl_multi_handle, easy_h);
1117 curl_easy_cleanup (easy_h);
1118 s->put_tmp_disconnecting = GNUNET_NO;
1119 s->put_tmp_disconnected = GNUNET_YES;
1120 s->client_put = NULL;
1123 * Handling a rare case:
1124 * plugin_send was called during temporary put disconnect,
1125 * reconnect required after connection was disconnected
1127 if (GNUNET_YES == s->put_reconnect_required)
1129 s->put_reconnect_required = GNUNET_NO;
1130 client_connect_put(s);
1133 if (easy_h == s->client_get)
1135 if ((0 != msg->data.result) || (http_statuscode != 200))
1137 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1138 "Session %p/connection %p: GET connection to `%s' ended with status %i reason %i: `%s'\n",
1139 s, msg->easy_handle, GNUNET_i2s (&s->target),
1142 curl_easy_strerror (msg->data.result));
1146 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1147 "Session %p/connection %p: GET connection to `%s' ended normal\n",
1148 s, msg->easy_handle, GNUNET_i2s (&s->target));
1149 /* Disconnect other transmission direction and tell transport */
1150 client_disconnect (s);
1155 while (mret == CURLM_CALL_MULTI_PERFORM);
1156 client_schedule (plugin, GNUNET_NO);
1160 client_connect_get (struct Session *s)
1163 /* create get connection */
1164 s->client_get = curl_easy_init ();
1166 curl_easy_setopt (s->client_get, CURLOPT_VERBOSE, 1L);
1167 curl_easy_setopt (s->client_get, CURLOPT_DEBUGFUNCTION, &client_log);
1168 curl_easy_setopt (s->client_get, CURLOPT_DEBUGDATA, s->client_get);
1171 curl_easy_setopt (s->client_get, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
1172 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYPEER, 0);
1173 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYHOST, 0);
1175 curl_easy_setopt (s->client_get, CURLOPT_URL, s->url);
1176 //curl_easy_setopt (s->client_get, CURLOPT_HEADERFUNCTION, &curl_get_header_cb);
1177 //curl_easy_setopt (s->client_get, CURLOPT_WRITEHEADER, ps);
1178 curl_easy_setopt (s->client_get, CURLOPT_READFUNCTION, client_send_cb);
1179 curl_easy_setopt (s->client_get, CURLOPT_READDATA, s);
1180 curl_easy_setopt (s->client_get, CURLOPT_WRITEFUNCTION, client_receive);
1181 curl_easy_setopt (s->client_get, CURLOPT_WRITEDATA, s);
1182 /* No timeout by default, timeout done with session timeout */
1183 curl_easy_setopt (s->client_get, CURLOPT_TIMEOUT, 0);
1184 curl_easy_setopt (s->client_get, CURLOPT_PRIVATE, s);
1185 curl_easy_setopt (s->client_get, CURLOPT_CONNECTTIMEOUT_MS,
1186 (long) HTTP_CLIENT_NOT_VALIDATED_TIMEOUT.rel_value);
1187 curl_easy_setopt (s->client_get, CURLOPT_BUFFERSIZE,
1188 2 * GNUNET_SERVER_MAX_MESSAGE_SIZE);
1189 #if CURL_TCP_NODELAY
1190 curl_easy_setopt (ps->recv_endpoint, CURLOPT_TCP_NODELAY, 1);
1192 mret = curl_multi_add_handle (s->plugin->curl_multi_handle, s->client_get);
1193 if (mret != CURLM_OK)
1195 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, s->plugin->name,
1196 "Session %p : Failed to add GET handle to multihandle: `%s'\n",
1197 s, curl_multi_strerror (mret));
1198 curl_easy_cleanup (s->client_get);
1199 s->client_get = NULL;
1201 return GNUNET_SYSERR;
1208 client_connect_put (struct Session *s)
1211 /* create put connection */
1212 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
1213 "Session %p : Init PUT handle \n", s);
1214 s->client_put = curl_easy_init ();
1216 curl_easy_setopt (s->client_put, CURLOPT_VERBOSE, 1L);
1217 curl_easy_setopt (s->client_put, CURLOPT_DEBUGFUNCTION, &client_log);
1218 curl_easy_setopt (s->client_put, CURLOPT_DEBUGDATA, s->client_put);
1221 curl_easy_setopt (s->client_put, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
1222 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYPEER, 0);
1223 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYHOST, 0);
1225 curl_easy_setopt (s->client_put, CURLOPT_URL, s->url);
1226 curl_easy_setopt (s->client_put, CURLOPT_UPLOAD, 1L);
1227 //curl_easy_setopt (s->client_put, CURLOPT_HEADERFUNCTION, &client_curl_header);
1228 //curl_easy_setopt (s->client_put, CURLOPT_WRITEHEADER, ps);
1229 curl_easy_setopt (s->client_put, CURLOPT_READFUNCTION, client_send_cb);
1230 curl_easy_setopt (s->client_put, CURLOPT_READDATA, s);
1231 curl_easy_setopt (s->client_put, CURLOPT_WRITEFUNCTION, client_receive_put);
1232 curl_easy_setopt (s->client_put, CURLOPT_WRITEDATA, s);
1233 /* No timeout by default, timeout done with session timeout */
1234 curl_easy_setopt (s->client_put, CURLOPT_TIMEOUT, 0);
1235 curl_easy_setopt (s->client_put, CURLOPT_PRIVATE, s);
1236 curl_easy_setopt (s->client_put, CURLOPT_CONNECTTIMEOUT_MS,
1237 (long) HTTP_CLIENT_NOT_VALIDATED_TIMEOUT.rel_value);
1238 curl_easy_setopt (s->client_put, CURLOPT_BUFFERSIZE,
1239 2 * GNUNET_SERVER_MAX_MESSAGE_SIZE);
1240 #if CURL_TCP_NODELAY
1241 curl_easy_setopt (s->client_put, CURLOPT_TCP_NODELAY, 1);
1243 mret = curl_multi_add_handle (s->plugin->curl_multi_handle, s->client_put);
1244 if (mret != CURLM_OK)
1246 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, s->plugin->name,
1247 "Session %p : Failed to add PUT handle to multihandle: `%s'\n",
1248 s, curl_multi_strerror (mret));
1249 curl_easy_cleanup (s->client_put);
1250 s->client_put = NULL;
1251 return GNUNET_SYSERR;
1257 client_connect (struct Session *s)
1260 struct HTTP_Client_Plugin *plugin = s->plugin;
1261 int res = GNUNET_OK;
1265 if (NULL == http_common_plugin_address_to_string (NULL, s->addr, s->addrlen))
1267 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1268 "Invalid address peer `%s'\n",
1269 GNUNET_i2s (&s->target));
1270 return GNUNET_SYSERR;
1273 GNUNET_asprintf (&s->url, "%s/%s;%u",
1274 http_common_plugin_address_to_string (plugin, s->addr, s->addrlen),
1275 GNUNET_h2s_full (&plugin->env->my_identity->hashPubKey),
1280 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1281 "Initiating outbound session peer `%s' using address `%s'\n",
1282 GNUNET_i2s (&s->target), s->url);
1284 if ((GNUNET_SYSERR == client_connect_get (s)) ||
1285 (GNUNET_SYSERR == client_connect_put (s)))
1288 return GNUNET_SYSERR;
1291 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1292 "Session %p: connected with connections GET %p and PUT %p\n",
1293 s, s->client_get, s->client_put);
1295 /* Perform connect */
1296 plugin->cur_connections += 2;
1297 GNUNET_STATISTICS_set (plugin->env->stats,
1298 "# HTTP client connections",
1299 plugin->cur_connections,
1302 /* Re-schedule since handles have changed */
1303 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
1305 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
1306 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1308 plugin->client_perform_task = GNUNET_SCHEDULER_add_now (client_run, plugin);
1314 * Creates a new outbound session the transport service will use to send data to the
1317 * @param cls the plugin
1318 * @param address the address
1319 * @return the session or NULL of max connections exceeded
1321 static struct Session *
1322 http_client_plugin_get_session (void *cls,
1323 const struct GNUNET_HELLO_Address *address)
1325 struct HTTP_Client_Plugin *plugin = cls;
1326 struct Session * s = NULL;
1327 struct sockaddr *sa;
1328 struct GNUNET_ATS_Information ats;
1332 GNUNET_assert (plugin != NULL);
1333 GNUNET_assert (address != NULL);
1334 GNUNET_assert (address->address != NULL);
1336 /* find existing session */
1337 s = client_lookup_session (plugin, address);
1341 if (plugin->max_connections <= plugin->cur_connections)
1343 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
1344 "Maximum number of connections (%u) reached: "
1345 "cannot connect to peer `%s'\n",
1346 plugin->max_connections,
1347 GNUNET_i2s (&address->peer));
1351 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
1352 ats.value = htonl (GNUNET_ATS_NET_UNSPECIFIED);
1353 sa = http_common_socket_from_address (address->address, address->address_length, &res);
1355 if (GNUNET_SYSERR == res)
1359 else if (GNUNET_YES == res)
1361 GNUNET_assert (NULL != sa);
1362 if (AF_INET == sa->sa_family)
1364 salen = sizeof (struct sockaddr_in);
1366 else if (AF_INET == sa->sa_family)
1368 salen = sizeof (struct sockaddr_in6);
1370 ats = plugin->env->get_address_type (plugin->env->cls, sa, salen);
1373 else if (GNUNET_NO == res)
1375 ats.value = htonl (GNUNET_ATS_COST_WAN);
1378 if (GNUNET_ATS_NET_UNSPECIFIED == ntohl(ats.value))
1384 s = GNUNET_malloc (sizeof (struct Session));
1385 memcpy (&s->target, &address->peer, sizeof (struct GNUNET_PeerIdentity));
1387 s->addr = GNUNET_malloc (address->address_length);
1388 memcpy (s->addr, address->address, address->address_length);
1389 s->addrlen = address->address_length;
1390 s->ats_address_network_type = ats.value;
1391 s->put_paused = GNUNET_NO;
1392 s->put_tmp_disconnecting = GNUNET_NO;
1393 s->put_tmp_disconnected = GNUNET_NO;
1394 client_start_session_timeout (s);
1396 /* add new session */
1397 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
1399 /* initiate new connection */
1400 if (GNUNET_SYSERR == client_connect (s))
1402 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1403 "Cannot connect to peer `%s' address `%s''\n",
1404 http_common_plugin_address_to_string (NULL, s->addr, s->addrlen),
1405 GNUNET_i2s (&s->target));
1406 client_delete_session (s);
1414 * Setup http_client plugin
1416 * @param plugin the plugin handle
1417 * @return GNUNET_OK on success, GNUNET_SYSERR on error
1420 client_start (struct HTTP_Client_Plugin *plugin)
1422 curl_global_init (CURL_GLOBAL_ALL);
1423 plugin->curl_multi_handle = curl_multi_init ();
1425 if (NULL == plugin->curl_multi_handle)
1427 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1428 _("Could not initialize curl multi handle, failed to start %s plugin!\n"),
1430 return GNUNET_SYSERR;
1436 * Session was idle, so disconnect it
1439 client_session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1441 GNUNET_assert (NULL != cls);
1442 struct Session *s = cls;
1444 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1445 GNUNET_log (TIMEOUT_LOG,
1446 "Session %p was idle for %llu ms, disconnecting\n",
1447 s, (unsigned long long) CLIENT_SESSION_TIMEOUT.rel_value);
1449 /* call session destroy function */
1450 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1455 * Start session timeout for session s
1457 * @param s the session
1460 client_start_session_timeout (struct Session *s)
1463 GNUNET_assert (NULL != s);
1464 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1465 s->timeout_task = GNUNET_SCHEDULER_add_delayed (CLIENT_SESSION_TIMEOUT,
1466 &client_session_timeout,
1468 GNUNET_log (TIMEOUT_LOG,
1469 "Timeout for session %p set to %llu ms\n",
1470 s, (unsigned long long) CLIENT_SESSION_TIMEOUT.rel_value);
1475 * Increment session timeout due to activity for session s
1477 * param s the session
1480 client_reschedule_session_timeout (struct Session *s)
1483 GNUNET_assert (NULL != s);
1484 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1486 GNUNET_SCHEDULER_cancel (s->timeout_task);
1487 s->timeout_task = GNUNET_SCHEDULER_add_delayed (CLIENT_SESSION_TIMEOUT,
1488 &client_session_timeout,
1490 GNUNET_log (TIMEOUT_LOG,
1491 "Timeout rescheduled for session %p set to %llu ms\n",
1492 s, (unsigned long long) CLIENT_SESSION_TIMEOUT.rel_value);
1497 * Cancel timeout due to activity for session s
1499 * param s the session
1502 client_stop_session_timeout (struct Session *s)
1504 GNUNET_assert (NULL != s);
1506 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1508 GNUNET_SCHEDULER_cancel (s->timeout_task);
1509 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1510 GNUNET_log (TIMEOUT_LOG, "Timeout stopped for session %p\n", s);
1516 * Another peer has suggested an address for this
1517 * peer and transport plugin. Check that this could be a valid
1518 * address. If so, consider adding it to the list
1521 * @param cls closure
1522 * @param addr pointer to the address
1523 * @param addrlen length of addr
1524 * @return GNUNET_OK if this is a plausible address for this peer
1528 http_client_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
1530 /* struct Plugin *plugin = cls; */
1532 /* A HTTP/S client does not have any valid address so:*/
1538 * Exit point from the plugin.
1540 * @param cls api as closure
1544 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1546 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1547 struct HTTP_Client_Plugin *plugin = api->cls;
1548 struct Session *pos;
1549 struct Session *next;
1551 if (NULL == api->cls)
1558 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1559 _("Shutting down plugin `%s'\n"),
1563 next = plugin->head;
1564 while (NULL != (pos = next))
1567 client_disconnect (pos);
1569 if (GNUNET_SCHEDULER_NO_TASK != plugin->client_perform_task)
1571 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
1572 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1576 if (NULL != plugin->curl_multi_handle)
1578 curl_multi_cleanup (plugin->curl_multi_handle);
1579 plugin->curl_multi_handle = NULL;
1581 curl_global_cleanup ();
1583 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1584 _("Shutdown for plugin `%s' complete\n"),
1587 GNUNET_free (plugin);
1596 * @param plugin the plugin handle
1597 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
1600 client_configure_plugin (struct HTTP_Client_Plugin *plugin)
1602 unsigned long long max_connections;
1604 /* Optional parameters */
1605 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg,
1607 "MAX_CONNECTIONS", &max_connections))
1608 max_connections = 128;
1609 plugin->max_connections = max_connections;
1611 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1612 _("Maximum number of connections is %u\n"),
1613 plugin->max_connections);
1618 * Entry point for the plugin.
1621 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1623 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1624 struct GNUNET_TRANSPORT_PluginFunctions *api;
1625 struct HTTP_Client_Plugin *plugin;
1627 if (NULL == env->receive)
1629 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1630 initialze the plugin or the API */
1631 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1633 api->address_to_string = &http_common_plugin_address_to_string;
1634 api->string_to_address = &http_common_plugin_string_to_address;
1635 api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
1639 plugin = GNUNET_malloc (sizeof (struct HTTP_Client_Plugin));
1642 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1644 api->send = &http_client_plugin_send;
1645 api->disconnect = &http_client_plugin_disconnect;
1646 api->check_address = &http_client_plugin_address_suggested;
1647 api->get_session = &http_client_plugin_get_session;
1648 api->address_to_string = &http_common_plugin_address_to_string;
1649 api->string_to_address = &http_common_plugin_string_to_address;
1650 api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
1654 plugin->name = "transport-https_client";
1655 plugin->protocol = "https";
1657 plugin->name = "transport-http_client";
1658 plugin->protocol = "http";
1660 plugin->last_tag = 1;
1662 if (GNUNET_SYSERR == client_configure_plugin (plugin))
1664 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
1669 if (GNUNET_SYSERR == client_start (plugin))
1671 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
1677 /* end of plugin_transport_http_client.c */