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22 * @file transport/plugin_transport_http_client.c
23 * @brief HTTP/S client transport plugin
24 * @author Matthias Wachs
28 #define PLUGIN_NAME "https_client"
29 #define HTTP_STAT_STR_CONNECTIONS "# HTTPS client connections"
30 #define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_https_client_init
31 #define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_https_client_done
33 #define PLUGIN_NAME "http_client"
34 #define HTTP_STAT_STR_CONNECTIONS "# HTTP client connections"
35 #define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_http_client_init
36 #define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_http_client_done
39 #define VERBOSE_CURL GNUNET_YES
41 #define PUT_DISCONNECT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
43 #define ENABLE_PUT GNUNET_YES
44 #define ENABLE_GET GNUNET_YES
47 #include "gnunet_util_lib.h"
48 #include "gnunet_protocols.h"
49 #include "gnunet_transport_plugin.h"
50 #include "plugin_transport_http_common.h"
51 #include <curl/curl.h>
56 * Encapsulation of all of the state of the plugin.
58 struct HTTP_Client_Plugin;
62 * Message to send using http
67 * next pointer for double linked list
69 struct HTTP_Message *next;
72 * previous pointer for double linked list
74 struct HTTP_Message *prev;
77 * buffer containing data to send
82 * amount of data already sent
92 * Continuation function to call once the transmission buffer
93 * has again space available. NULL if there is no
94 * continuation to call.
96 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
99 * Closure for transmit_cont.
101 void *transmit_cont_cls;
106 * Session handle for connections.
112 * A connection handle
115 struct ConnectionHandle
118 * The curl easy handle
123 * The related session
130 * Session handle for connections.
135 * To whom are we talking to (set to our identity
136 * if we are still waiting for the welcome message)
138 struct GNUNET_PeerIdentity target;
141 * Stored in a linked list.
143 struct Session *next;
146 * Stored in a linked list.
148 struct Session *prev;
151 * The URL to connect to
158 struct HttpAddress *addr;
166 * ATS network type in NBO
168 uint32_t ats_address_network_type;
171 * Pointer to the global plugin struct.
173 struct HTTP_Client_Plugin *plugin;
180 struct ConnectionHandle put;
181 struct ConnectionHandle get;
184 * Is the client PUT handle currently paused
189 * Is the client PUT handle disconnect in progress?
191 int put_tmp_disconnecting;
194 * Is the client PUT handle temporarily disconnected?
196 int put_tmp_disconnected;
199 * We received data to send while disconnecting, reconnect immediately
201 int put_reconnect_required;
204 * Client receive handle
209 * Outbound overhead due to HTTP connection
210 * Add to next message of this session when calling callback
215 * next pointer for double linked list
217 struct HTTP_Message *msg_head;
220 * previous pointer for double linked list
222 struct HTTP_Message *msg_tail;
225 * Message stream tokenizer for incoming data
227 struct GNUNET_SERVER_MessageStreamTokenizer *msg_tk;
230 * Session timeout task
232 GNUNET_SCHEDULER_TaskIdentifier put_disconnect_task;
235 * Session timeout task
237 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
240 * Task to wake up client receive handle when receiving is allowed again
242 GNUNET_SCHEDULER_TaskIdentifier recv_wakeup_task;
245 * Absolute time when to receive data again
246 * Used for receive throttling
248 struct GNUNET_TIME_Absolute next_receive;
253 * Encapsulation of all of the state of the plugin.
255 struct HTTP_Client_Plugin
260 struct GNUNET_TRANSPORT_PluginEnvironment *env;
263 * Linked list head of open sessions.
265 struct Session *head;
268 * Linked list tail of open sessions.
270 struct Session *tail;
283 * My options to be included in the address
288 * Maximum number of sockets the plugin can use
289 * Each http inbound /outbound connections are two connections
291 unsigned int max_connections;
294 * Current number of sockets the plugin can use
295 * Each http inbound /outbound connections are two connections
297 unsigned int cur_connections;
300 * Last used unique HTTP connection tag
317 CURLM *curl_multi_handle;
322 GNUNET_SCHEDULER_TaskIdentifier client_perform_task;
327 * Encapsulation of all of the state of the plugin.
329 struct HTTP_Client_Plugin *p;
333 * Start session timeout for a session
334 * @param s the session
337 client_start_session_timeout (struct Session *s);
341 * Increment session timeout due to activity for a session
342 * @param s the session
345 client_reschedule_session_timeout (struct Session *s);
349 * Cancel timeout for a session
350 * @param s the session
353 client_stop_session_timeout (struct Session *s);
357 * Function setting up file descriptors and scheduling task to run
359 * @param plugin plugin as closure
360 * @param now schedule task in 1ms, regardless of what curl may say
361 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
364 client_schedule (struct HTTP_Client_Plugin *plugin, int now);
368 * Connect a HTTP put connection
370 * @param s the session to connect
371 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for success
374 client_connect_put (struct Session *s);
378 * Does a session s exists?
380 * @param plugin the plugin
381 * @param s desired session
382 * @return GNUNET_YES or GNUNET_NO
385 client_exist_session (struct HTTP_Client_Plugin *plugin, struct Session *s)
387 struct Session * head;
389 GNUNET_assert (NULL != plugin);
390 GNUNET_assert (NULL != s);
392 for (head = plugin->head; head != NULL; head = head->next)
404 * @param curl the curl easy handle
405 * @param type message type
406 * @param data data to log, NOT a 0-terminated string
407 * @param size data length
408 * @param cls the closure
412 client_log (CURL *curl, curl_infotype type,
413 const char *data, size_t size, void *cls)
415 struct ConnectionHandle *ch = cls;
416 const char *ttype = "UNSPECIFIED";
418 if ((type == CURLINFO_TEXT) || (type == CURLINFO_HEADER_IN) || (type == CURLINFO_HEADER_OUT))
426 case CURLINFO_HEADER_IN:
429 case CURLINFO_HEADER_OUT:
430 ttype = "HEADER_OUT";
433 GNUNET_assert (NULL != ch);
434 GNUNET_assert (NULL != ch->easyhandle);
435 GNUNET_assert (NULL != ch->s);
436 ch->s->overhead += size;
439 ttype = "UNSPECIFIED";
443 memcpy (text, data, size);
444 if (text[size - 1] == '\n')
449 text[size + 1] = '\0';
452 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "transport-https_client",
453 "Connection %p %s: %s", ch->easyhandle, ttype, text);
455 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "transport-http_client",
456 "Connection %p %s: %s", ch->easyhandle, ttype, text);
464 * Function that can be used by the transport service to transmit
465 * a message using the plugin. Note that in the case of a
466 * peer disconnecting, the continuation MUST be called
467 * prior to the disconnect notification itself. This function
468 * will be called with this peer's HELLO message to initiate
469 * a fresh connection to another peer.
472 * @param s which session must be used
473 * @param msgbuf the message to transmit
474 * @param msgbuf_size number of bytes in 'msgbuf'
475 * @param priority how important is the message (most plugins will
476 * ignore message priority and just FIFO)
477 * @param to how long to wait at most for the transmission (does not
478 * require plugins to discard the message after the timeout,
479 * just advisory for the desired delay; most plugins will ignore
481 * @param cont continuation to call once the message has
482 * been transmitted (or if the transport is ready
483 * for the next transmission call; or if the
484 * peer disconnected...); can be NULL
485 * @param cont_cls closure for cont
486 * @return number of bytes used (on the physical network, with overheads);
487 * -1 on hard errors (i.e. address invalid); 0 is a legal value
488 * and does NOT mean that the message was not transmitted (DV)
491 http_client_plugin_send (void *cls,
493 const char *msgbuf, size_t msgbuf_size,
494 unsigned int priority,
495 struct GNUNET_TIME_Relative to,
496 GNUNET_TRANSPORT_TransmitContinuation cont,
499 struct HTTP_Client_Plugin *plugin = cls;
500 struct HTTP_Message *msg;
503 GNUNET_assert (plugin != NULL);
504 GNUNET_assert (s != NULL);
506 /* lookup if session is really existing */
507 if (GNUNET_YES != client_exist_session (plugin, s))
510 return GNUNET_SYSERR;
513 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
514 "Session %p/connection %p: Sending message with %u to peer `%s' \n",
516 msgbuf_size, GNUNET_i2s (&s->target));
518 /* create new message and schedule */
519 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
521 msg->size = msgbuf_size;
523 msg->buf = (char *) &msg[1];
524 msg->transmit_cont = cont;
525 msg->transmit_cont_cls = cont_cls;
526 memcpy (msg->buf, msgbuf, msgbuf_size);
527 GNUNET_CONTAINER_DLL_insert_tail (s->msg_head, s->msg_tail, msg);
529 GNUNET_asprintf (&stat_txt, "# bytes currently in %s_client buffers", plugin->protocol);
530 GNUNET_STATISTICS_update (plugin->env->stats,
531 stat_txt, msgbuf_size, GNUNET_NO);
533 GNUNET_free (stat_txt);
535 if (GNUNET_YES == s->put_tmp_disconnecting)
537 /* PUT connection is currently getting disconnected */
538 s->put_reconnect_required = GNUNET_YES;
539 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
540 "Session %p/connection %jp: currently disconnecting, reconnecting immediately\n",
544 else if (GNUNET_YES == s->put_paused)
546 /* PUT connection was paused, unpause */
547 GNUNET_assert (s->put_disconnect_task != GNUNET_SCHEDULER_NO_TASK);
548 GNUNET_SCHEDULER_cancel (s->put_disconnect_task);
549 s->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
550 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
551 "Session %p/connection %p: unpausing connection\n",
553 s->put_paused = GNUNET_NO;
554 curl_easy_pause (s->client_put, CURLPAUSE_CONT);
556 else if (GNUNET_YES == s->put_tmp_disconnected)
558 /* PUT connection was disconnected, reconnect */
559 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
560 "Session %p: Reconnecting PUT connection\n",
562 s->put_tmp_disconnected = GNUNET_NO;
563 GNUNET_break (s->client_put == NULL);
564 if (GNUNET_SYSERR == client_connect_put (s))
566 return GNUNET_SYSERR;
570 client_schedule (s->plugin, GNUNET_YES);
571 client_reschedule_session_timeout (s);
579 * @param s the session to delete
582 client_delete_session (struct Session *s)
584 struct HTTP_Client_Plugin *plugin = s->plugin;
585 struct HTTP_Message *pos;
586 struct HTTP_Message *next;
588 client_stop_session_timeout (s);
590 if (GNUNET_SCHEDULER_NO_TASK != s->put_disconnect_task)
592 GNUNET_SCHEDULER_cancel (s->put_disconnect_task);
593 s->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
596 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
599 while (NULL != (pos = next))
602 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, pos);
603 if (pos->transmit_cont != NULL)
604 pos->transmit_cont (pos->transmit_cont_cls, &s->target, GNUNET_SYSERR,
605 pos->size, pos->pos + s->overhead);
610 if (s->msg_tk != NULL)
612 GNUNET_SERVER_mst_destroy (s->msg_tk);
615 GNUNET_free (s->addr);
616 GNUNET_free (s->url);
623 * Disconnect a session
625 * @param cls the `struct HTTP_Client_Plugin`
627 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
630 http_client_session_disconnect (void *cls,
633 struct HTTP_Client_Plugin *plugin = cls;
634 struct HTTP_Message *msg;
635 struct HTTP_Message *t;
639 if (GNUNET_YES != client_exist_session (plugin, s))
642 return GNUNET_SYSERR;
645 if (s->client_put != NULL)
647 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
648 "Session %p/connection %p: disconnecting PUT connection to peer `%s'\n",
649 s, s->client_put, GNUNET_i2s (&s->target));
651 /* remove curl handle from multi handle */
652 mret = curl_multi_remove_handle (plugin->curl_multi_handle, s->client_put);
653 if (mret != CURLM_OK)
655 /* clean up easy handle, handle is now invalid and free'd */
659 curl_easy_cleanup (s->client_put);
660 s->client_put = NULL;
664 if (s->recv_wakeup_task != GNUNET_SCHEDULER_NO_TASK)
666 GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
667 s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
670 if (s->client_get != NULL)
672 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
673 "Session %p/connection %p: disconnecting GET connection to peer `%s'\n",
674 s, s->client_get, GNUNET_i2s (&s->target));
676 /* remove curl handle from multi handle */
677 mret = curl_multi_remove_handle (plugin->curl_multi_handle, s->client_get);
678 if (mret != CURLM_OK)
680 /* clean up easy handle, handle is now invalid and free'd */
684 curl_easy_cleanup (s->client_get);
685 s->client_get = NULL;
692 if (NULL != msg->transmit_cont)
693 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR,
694 msg->size, msg->pos + s->overhead);
696 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
701 GNUNET_assert (plugin->cur_connections >= 2);
702 plugin->cur_connections -= 2;
703 GNUNET_STATISTICS_set (plugin->env->stats,
704 HTTP_STAT_STR_CONNECTIONS,
705 plugin->cur_connections,
708 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
709 "Session %p: notifying transport about ending session\n",s);
711 plugin->env->session_end (plugin->env->cls, &s->target, s);
712 client_delete_session (s);
714 /* Re-schedule since handles have changed */
715 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
717 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
718 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
720 client_schedule (plugin, GNUNET_YES);
727 * Function that can be used to force the plugin to disconnect
728 * from the given peer and cancel all previous transmissions
729 * (and their continuationc).
732 * @param target peer from which to disconnect
735 http_client_peer_disconnect (void *cls,
736 const struct GNUNET_PeerIdentity *target)
738 struct HTTP_Client_Plugin *plugin = cls;
739 struct Session *next = NULL;
740 struct Session *pos = NULL;
742 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
743 "Transport tells me to disconnect `%s'\n",
744 GNUNET_i2s (target));
747 while (NULL != (pos = next))
750 if (0 == memcmp (target, &pos->target, sizeof (struct GNUNET_PeerIdentity)))
752 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
753 "Disconnecting session %p to `%pos'\n",
754 pos, GNUNET_i2s (target));
755 GNUNET_assert (GNUNET_OK == http_client_session_disconnect (plugin,
763 * Check if a sessions exists for an specific address
765 * @param plugin the plugin
766 * @param address the address
767 * @return the session or NULL
769 static struct Session *
770 client_lookup_session (struct HTTP_Client_Plugin *plugin,
771 const struct GNUNET_HELLO_Address *address)
775 for (pos = plugin->head; NULL != pos; pos = pos->next)
776 if ((0 == memcmp (&address->peer, &pos->target, sizeof (struct GNUNET_PeerIdentity))) &&
777 (address->address_length == pos->addrlen) &&
778 (0 == memcmp (address->address, pos->addr, pos->addrlen)))
784 client_put_disconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
786 struct Session *s = cls;
787 s->put_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
788 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
789 "Session %p/connection %p: will be disconnected due to no activity\n",
791 s->put_paused = GNUNET_NO;
792 s->put_tmp_disconnecting = GNUNET_YES;
793 curl_easy_pause (s->client_put, CURLPAUSE_CONT);
794 client_schedule (s->plugin, GNUNET_YES);
800 * Callback method used with libcurl
801 * Method is called when libcurl needs to read data during sending
803 * @param stream pointer where to write data
804 * @param size size of an individual element
805 * @param nmemb count of elements that can be written to the buffer
806 * @param cls source pointer, passed to the libcurl handle
807 * @return bytes written to stream, returning 0 will terminate connection!
810 client_send_cb (void *stream, size_t size, size_t nmemb, void *cls)
812 struct Session *s = cls;
813 struct HTTP_Client_Plugin *plugin = s->plugin;
814 struct HTTP_Message *msg = s->msg_head;
818 if (GNUNET_YES != client_exist_session (plugin, s))
823 if (GNUNET_YES == s->put_tmp_disconnecting)
826 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
827 "Session %p/connection %p: disconnect due to inactivity\n",
834 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
835 "Session %p/connection %p: nothing to send, suspending\n",
837 s->put_disconnect_task = GNUNET_SCHEDULER_add_delayed (PUT_DISCONNECT_TIMEOUT, &client_put_disconnect, s);
838 s->put_paused = GNUNET_YES;
839 return CURL_READFUNC_PAUSE;
842 GNUNET_assert (msg->pos < msg->size);
843 /* calculate how much fits in buffer */
844 len = GNUNET_MIN (msg->size - msg->pos,
846 memcpy (stream, &msg->buf[msg->pos], len);
848 if (msg->pos == msg->size)
850 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
851 "Session %p/connection %p: sent message with %u bytes sent, removing message from queue\n",
852 s, s->client_put, msg->size, msg->pos);
853 /* Calling transmit continuation */
854 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
855 if (NULL != msg->transmit_cont)
856 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_OK,
857 msg->size, msg->size + s->overhead);
862 GNUNET_asprintf (&stat_txt, "# bytes currently in %s_client buffers", plugin->protocol);
863 GNUNET_STATISTICS_update (plugin->env->stats,
864 stat_txt, -len, GNUNET_NO);
865 GNUNET_free (stat_txt);
867 GNUNET_asprintf (&stat_txt, "# bytes transmitted via %s_client", plugin->protocol);
868 GNUNET_STATISTICS_update (plugin->env->stats,
869 stat_txt, len, GNUNET_NO);
870 GNUNET_free (stat_txt);
872 client_reschedule_session_timeout (s);
878 * Wake up a curl handle which was suspended
880 * @param cls the session
881 * @param tc task context
884 client_wake_up (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
886 struct Session *s = cls;
888 if (GNUNET_YES != client_exist_session(p, s))
893 s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
894 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
896 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
897 "Session %p/connection %p: Waking up GET handle\n", s, s->client_get);
898 if (s->client_get != NULL)
899 curl_easy_pause (s->client_get, CURLPAUSE_CONT);
904 * Callback for message stream tokenizer
906 * @param cls the session
907 * @param client not used
908 * @param message the message received
909 * @return always GNUNET_OK
912 client_receive_mst_cb (void *cls, void *client,
913 const struct GNUNET_MessageHeader *message)
915 struct Session *s = cls;
916 struct HTTP_Client_Plugin *plugin;
917 struct GNUNET_TIME_Relative delay;
918 struct GNUNET_ATS_Information atsi;
921 if (GNUNET_YES != client_exist_session(p, s))
928 atsi.type = htonl (GNUNET_ATS_NETWORK_TYPE);
929 atsi.value = s->ats_address_network_type;
930 GNUNET_break (s->ats_address_network_type != ntohl (GNUNET_ATS_NET_UNSPECIFIED));
931 delay = s->plugin->env->receive (plugin->env->cls, &s->target, message,
932 s, (const char *) s->addr, s->addrlen);
934 plugin->env->update_address_metrics (plugin->env->cls,
941 GNUNET_asprintf (&stat_txt, "# bytes received via %s_client", plugin->protocol);
942 GNUNET_STATISTICS_update (plugin->env->stats,
943 stat_txt, ntohs(message->size), GNUNET_NO);
944 GNUNET_free (stat_txt);
947 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), delay);
949 if (GNUNET_TIME_absolute_get ().abs_value_us < s->next_receive.abs_value_us)
951 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
952 "Client: peer `%s' address `%s' next read delayed for %s\n",
953 GNUNET_i2s (&s->target),
954 http_common_plugin_address_to_string (NULL,
956 s->addr, s->addrlen),
957 GNUNET_STRINGS_relative_time_to_string (delay,
960 client_reschedule_session_timeout (s);
966 * Callback method used with libcurl when data for a PUT connection are
967 * received. We do not expect data here, so we just dismiss it
969 * @param stream pointer where to write data
970 * @param size size of an individual element
971 * @param nmemb count of elements that can be written to the buffer
972 * @param cls destination pointer, passed to the libcurl handle
973 * @return bytes read from stream
976 client_receive_put (void *stream, size_t size, size_t nmemb, void *cls)
983 * Callback method used with libcurl when data for a GET connection are
984 * received. Forward to MST
986 * @param stream pointer where to write data
987 * @param size size of an individual element
988 * @param nmemb count of elements that can be written to the buffer
989 * @param cls destination pointer, passed to the libcurl handle
990 * @return bytes read from stream
993 client_receive (void *stream, size_t size, size_t nmemb, void *cls)
995 struct Session *s = cls;
996 struct GNUNET_TIME_Absolute now;
997 size_t len = size * nmemb;
999 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
1000 "Session %p / connection %p: Received %u bytes from peer `%s'\n",
1002 len, GNUNET_i2s (&s->target));
1003 now = GNUNET_TIME_absolute_get ();
1004 if (now.abs_value_us < s->next_receive.abs_value_us)
1006 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1007 struct GNUNET_TIME_Relative delta =
1008 GNUNET_TIME_absolute_get_difference (now, s->next_receive);
1009 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
1010 "Session %p / connection %p: No inbound bandwidth available! Next read was delayed for %s\n",
1012 GNUNET_STRINGS_relative_time_to_string (delta,
1014 if (s->recv_wakeup_task != GNUNET_SCHEDULER_NO_TASK)
1016 GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
1017 s->recv_wakeup_task = GNUNET_SCHEDULER_NO_TASK;
1019 s->recv_wakeup_task =
1020 GNUNET_SCHEDULER_add_delayed (delta, &client_wake_up, s);
1021 return CURL_WRITEFUNC_PAUSE;
1023 if (NULL == s->msg_tk)
1024 s->msg_tk = GNUNET_SERVER_mst_create (&client_receive_mst_cb, s);
1025 GNUNET_SERVER_mst_receive (s->msg_tk, s, stream, len, GNUNET_NO, GNUNET_NO);
1031 * Task performing curl operations
1033 * @param cls plugin as closure
1034 * @param tc gnunet scheduler task context
1037 client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1041 * Function setting up file descriptors and scheduling task to run
1043 * @param plugin the plugin as closure
1044 * @param now schedule task in 1ms, regardless of what curl may say
1045 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
1048 client_schedule (struct HTTP_Client_Plugin *plugin, int now)
1054 struct GNUNET_NETWORK_FDSet *grs;
1055 struct GNUNET_NETWORK_FDSet *gws;
1058 struct GNUNET_TIME_Relative timeout;
1060 /* Cancel previous scheduled task */
1061 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
1063 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
1064 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1070 mret = curl_multi_fdset (plugin->curl_multi_handle, &rs, &ws, &es, &max);
1071 if (mret != CURLM_OK)
1073 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("%s failed at %s:%d: `%s'\n"),
1074 "curl_multi_fdset", __FILE__, __LINE__,
1075 curl_multi_strerror (mret));
1076 return GNUNET_SYSERR;
1078 mret = curl_multi_timeout (plugin->curl_multi_handle, &to);
1080 timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1);
1082 timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
1083 if (now == GNUNET_YES)
1084 timeout = GNUNET_TIME_UNIT_MILLISECONDS;
1086 if (mret != CURLM_OK)
1088 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("%s failed at %s:%d: `%s'\n"),
1089 "curl_multi_timeout", __FILE__, __LINE__,
1090 curl_multi_strerror (mret));
1091 return GNUNET_SYSERR;
1094 grs = GNUNET_NETWORK_fdset_create ();
1095 gws = GNUNET_NETWORK_fdset_create ();
1096 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1097 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1099 plugin->client_perform_task =
1100 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1102 &client_run, plugin);
1103 GNUNET_NETWORK_fdset_destroy (gws);
1104 GNUNET_NETWORK_fdset_destroy (grs);
1110 * Task performing curl operations
1112 * @param cls plugin as closure
1113 * @param tc gnunet scheduler task context
1116 client_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1118 struct HTTP_Client_Plugin *plugin = cls;
1120 long http_statuscode;
1123 GNUNET_assert (cls != NULL);
1125 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1126 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1132 mret = curl_multi_perform (plugin->curl_multi_handle, &running);
1137 while ((msg = curl_multi_info_read (plugin->curl_multi_handle, &msgs_left)))
1139 CURL *easy_h = msg->easy_handle;
1140 struct Session *s = NULL;
1141 char *d = (char *) s;
1146 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1147 "Client: connection to ended with reason %i: `%s', %i handles running\n",
1149 curl_easy_strerror (msg->data.result), running);
1153 GNUNET_assert (CURLE_OK ==
1154 curl_easy_getinfo (easy_h, CURLINFO_PRIVATE, &d));
1155 s = (struct Session *) d;
1157 if (GNUNET_YES != client_exist_session(plugin, s))
1163 GNUNET_assert (s != NULL);
1164 if (msg->msg == CURLMSG_DONE)
1166 curl_easy_getinfo (easy_h, CURLINFO_RESPONSE_CODE, &http_statuscode);
1167 if (easy_h == s->client_put)
1169 if ((0 != msg->data.result) || (http_statuscode != 200))
1171 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1172 "Session %p/connection %p: PUT connection to `%s' ended with status %i reason %i: `%s'\n",
1173 s, msg->easy_handle, GNUNET_i2s (&s->target),
1176 curl_easy_strerror (msg->data.result));
1179 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1180 "Session %p/connection %p: PUT connection to `%s' ended normal\n",
1181 s, msg->easy_handle, GNUNET_i2s (&s->target));
1182 if (s->client_get == NULL)
1184 /* Disconnect other transmission direction and tell transport */
1186 curl_multi_remove_handle (plugin->curl_multi_handle, easy_h);
1187 curl_easy_cleanup (easy_h);
1188 s->put_tmp_disconnecting = GNUNET_NO;
1189 s->put_tmp_disconnected = GNUNET_YES;
1190 s->client_put = NULL;
1191 s->put.easyhandle = NULL;
1195 * Handling a rare case:
1196 * plugin_send was called during temporary put disconnect,
1197 * reconnect required after connection was disconnected
1199 if (GNUNET_YES == s->put_reconnect_required)
1201 s->put_reconnect_required = GNUNET_NO;
1202 if (GNUNET_SYSERR == client_connect_put(s))
1204 GNUNET_break (s->client_put == NULL);
1205 GNUNET_break (s->put_tmp_disconnected == GNUNET_NO);
1209 if (easy_h == s->client_get)
1211 if ((0 != msg->data.result) || (http_statuscode != 200))
1213 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1214 "Session %p/connection %p: GET connection to `%s' ended with status %i reason %i: `%s'\n",
1215 s, msg->easy_handle, GNUNET_i2s (&s->target),
1218 curl_easy_strerror (msg->data.result));
1222 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1223 "Session %p/connection %p: GET connection to `%s' ended normal\n",
1224 s, msg->easy_handle, GNUNET_i2s (&s->target));
1225 /* Disconnect other transmission direction and tell transport */
1226 s->get.easyhandle = NULL;
1228 http_client_session_disconnect (plugin, s);
1233 while (mret == CURLM_CALL_MULTI_PERFORM);
1234 client_schedule (plugin, GNUNET_NO);
1239 * Connect GET connection for a session
1241 * @param s the session to connect
1242 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
1245 client_connect_get (struct Session *s)
1249 /* create get connection */
1250 s->client_get = curl_easy_init ();
1252 s->get.easyhandle = s->client_get;
1254 curl_easy_setopt (s->client_get, CURLOPT_VERBOSE, 1L);
1255 curl_easy_setopt (s->client_get, CURLOPT_DEBUGFUNCTION, &client_log);
1256 curl_easy_setopt (s->client_get, CURLOPT_DEBUGDATA, &s->get);
1259 curl_easy_setopt (s->client_get, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
1260 if (HTTP_OPTIONS_VERIFY_CERTIFICATE ==
1261 (ntohl (s->addr->options) & HTTP_OPTIONS_VERIFY_CERTIFICATE))
1263 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYPEER, 1L);
1264 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYHOST, 2L);
1268 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYPEER, 0);
1269 curl_easy_setopt (s->client_get, CURLOPT_SSL_VERIFYHOST, 0);
1271 curl_easy_setopt (s->client_get, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
1272 curl_easy_setopt (s->client_get, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
1274 curl_easy_setopt (s->client_get, CURLOPT_PROTOCOLS, CURLPROTO_HTTP);
1275 curl_easy_setopt (s->client_get, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP);
1278 curl_easy_setopt (s->client_get, CURLOPT_URL, s->url);
1279 //curl_easy_setopt (s->client_get, CURLOPT_HEADERFUNCTION, &curl_get_header_cb);
1280 //curl_easy_setopt (s->client_get, CURLOPT_WRITEHEADER, ps);
1281 curl_easy_setopt (s->client_get, CURLOPT_READFUNCTION, client_send_cb);
1282 curl_easy_setopt (s->client_get, CURLOPT_READDATA, s);
1283 curl_easy_setopt (s->client_get, CURLOPT_WRITEFUNCTION, client_receive);
1284 curl_easy_setopt (s->client_get, CURLOPT_WRITEDATA, s);
1285 /* No timeout by default, timeout done with session timeout */
1286 curl_easy_setopt (s->client_get, CURLOPT_TIMEOUT, 0);
1287 curl_easy_setopt (s->client_get, CURLOPT_PRIVATE, s);
1288 curl_easy_setopt (s->client_get, CURLOPT_CONNECTTIMEOUT_MS,
1289 (long) HTTP_CLIENT_NOT_VALIDATED_TIMEOUT.rel_value_us / 1000LL);
1290 curl_easy_setopt (s->client_get, CURLOPT_BUFFERSIZE,
1291 2 * GNUNET_SERVER_MAX_MESSAGE_SIZE);
1292 #if CURL_TCP_NODELAY
1293 curl_easy_setopt (ps->recv_endpoint, CURLOPT_TCP_NODELAY, 1);
1295 curl_easy_setopt (s->client_get, CURLOPT_FOLLOWLOCATION, 0);
1297 mret = curl_multi_add_handle (s->plugin->curl_multi_handle, s->client_get);
1298 if (mret != CURLM_OK)
1300 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, s->plugin->name,
1301 "Session %p : Failed to add GET handle to multihandle: `%s'\n",
1302 s, curl_multi_strerror (mret));
1303 curl_easy_cleanup (s->client_get);
1304 s->client_get = NULL;
1306 s->get.easyhandle = NULL;
1308 return GNUNET_SYSERR;
1315 * Connect a HTTP put connection
1317 * @param s the session to connect
1318 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
1321 client_connect_put (struct Session *s)
1324 /* create put connection */
1325 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, s->plugin->name,
1326 "Session %p : Init PUT handle \n", s);
1327 s->client_put = curl_easy_init ();
1329 s->put.easyhandle = s->client_put;
1331 curl_easy_setopt (s->client_put, CURLOPT_VERBOSE, 1L);
1332 curl_easy_setopt (s->client_put, CURLOPT_DEBUGFUNCTION, &client_log);
1333 curl_easy_setopt (s->client_put, CURLOPT_DEBUGDATA, &s->put);
1336 curl_easy_setopt (s->client_put, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
1337 if (HTTP_OPTIONS_VERIFY_CERTIFICATE ==
1338 (ntohl (s->addr->options) & HTTP_OPTIONS_VERIFY_CERTIFICATE))
1340 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYPEER, 1L);
1341 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYHOST, 2L);
1345 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYPEER, 0);
1346 curl_easy_setopt (s->client_put, CURLOPT_SSL_VERIFYHOST, 0);
1348 curl_easy_setopt (s->client_get, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
1349 curl_easy_setopt (s->client_get, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
1351 curl_easy_setopt (s->client_get, CURLOPT_PROTOCOLS, CURLPROTO_HTTP);
1352 curl_easy_setopt (s->client_get, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP);
1354 curl_easy_setopt (s->client_put, CURLOPT_URL, s->url);
1355 curl_easy_setopt (s->client_put, CURLOPT_UPLOAD, 1L);
1356 //curl_easy_setopt (s->client_put, CURLOPT_HEADERFUNCTION, &client_curl_header);
1357 //curl_easy_setopt (s->client_put, CURLOPT_WRITEHEADER, ps);
1358 curl_easy_setopt (s->client_put, CURLOPT_READFUNCTION, client_send_cb);
1359 curl_easy_setopt (s->client_put, CURLOPT_READDATA, s);
1360 curl_easy_setopt (s->client_put, CURLOPT_WRITEFUNCTION, client_receive_put);
1361 curl_easy_setopt (s->client_put, CURLOPT_WRITEDATA, s);
1362 /* No timeout by default, timeout done with session timeout */
1363 curl_easy_setopt (s->client_put, CURLOPT_TIMEOUT, 0);
1364 curl_easy_setopt (s->client_put, CURLOPT_PRIVATE, s);
1365 curl_easy_setopt (s->client_put, CURLOPT_CONNECTTIMEOUT_MS,
1366 (long) HTTP_CLIENT_NOT_VALIDATED_TIMEOUT.rel_value_us / 1000LL);
1367 curl_easy_setopt (s->client_put, CURLOPT_BUFFERSIZE,
1368 2 * GNUNET_SERVER_MAX_MESSAGE_SIZE);
1369 #if CURL_TCP_NODELAY
1370 curl_easy_setopt (s->client_put, CURLOPT_TCP_NODELAY, 1);
1372 mret = curl_multi_add_handle (s->plugin->curl_multi_handle, s->client_put);
1373 if (mret != CURLM_OK)
1375 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, s->plugin->name,
1376 "Session %p : Failed to add PUT handle to multihandle: `%s'\n",
1377 s, curl_multi_strerror (mret));
1378 curl_easy_cleanup (s->client_put);
1379 s->client_put = NULL;
1380 s->put.easyhandle = NULL;
1382 s->put_tmp_disconnected = GNUNET_YES;
1383 return GNUNET_SYSERR;
1385 s->put_tmp_disconnected = GNUNET_NO;
1391 * Connect both PUT and GET connection for a session
1393 * @param s the session to connect
1394 * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
1397 client_connect (struct Session *s)
1400 struct HTTP_Client_Plugin *plugin = s->plugin;
1401 int res = GNUNET_OK;
1404 if (NULL == http_common_plugin_address_to_string (NULL, plugin->protocol, s->addr, s->addrlen))
1406 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1407 "Invalid address peer `%s'\n",
1408 GNUNET_i2s (&s->target));
1409 return GNUNET_SYSERR;
1412 GNUNET_asprintf (&s->url, "%s/%s;%u",
1413 http_common_plugin_address_to_url (NULL, s->addr, s->addrlen),
1414 GNUNET_i2s_full (plugin->env->my_identity),
1419 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1420 "Initiating outbound session peer `%s' using address `%s'\n",
1421 GNUNET_i2s (&s->target), s->url);
1423 if ((GNUNET_SYSERR == client_connect_get (s)) ||
1424 (GNUNET_SYSERR == client_connect_put (s)))
1427 return GNUNET_SYSERR;
1430 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1431 "Session %p: connected with connections GET %p and PUT %p\n",
1432 s, s->client_get, s->client_put);
1434 /* Perform connect */
1435 plugin->cur_connections += 2;
1436 GNUNET_STATISTICS_set (plugin->env->stats,
1437 HTTP_STAT_STR_CONNECTIONS,
1438 plugin->cur_connections,
1441 /* Re-schedule since handles have changed */
1442 if (plugin->client_perform_task != GNUNET_SCHEDULER_NO_TASK)
1444 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
1445 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1447 plugin->client_perform_task = GNUNET_SCHEDULER_add_now (client_run, plugin);
1453 * Function obtain the network type for a session
1455 * @param cls closure ('struct Plugin*')
1456 * @param session the session
1457 * @return the network type in HBO or GNUNET_SYSERR
1459 static enum GNUNET_ATS_Network_Type
1460 http_client_get_network (void *cls,
1461 struct Session *session)
1463 GNUNET_assert (NULL != session);
1464 return ntohl (session->ats_address_network_type);
1469 * Creates a new outbound session the transport service will use to send data to the
1472 * @param cls the plugin
1473 * @param address the address
1474 * @return the session or NULL of max connections exceeded
1476 static struct Session *
1477 http_client_plugin_get_session (void *cls,
1478 const struct GNUNET_HELLO_Address *address)
1480 struct HTTP_Client_Plugin *plugin = cls;
1481 struct Session * s = NULL;
1482 struct sockaddr *sa;
1483 struct GNUNET_ATS_Information ats;
1487 GNUNET_assert (plugin != NULL);
1488 GNUNET_assert (address != NULL);
1489 GNUNET_assert (address->address != NULL);
1491 /* find existing session */
1492 s = client_lookup_session (plugin, address);
1496 if (plugin->max_connections <= plugin->cur_connections)
1498 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
1499 "Maximum number of connections (%u) reached: "
1500 "cannot connect to peer `%s'\n",
1501 plugin->max_connections,
1502 GNUNET_i2s (&address->peer));
1506 /* Determine network location */
1507 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
1508 ats.value = htonl (GNUNET_ATS_NET_UNSPECIFIED);
1509 sa = http_common_socket_from_address (address->address, address->address_length, &res);
1510 if (GNUNET_SYSERR == res)
1514 else if (GNUNET_YES == res)
1516 GNUNET_assert (NULL != sa);
1517 if (AF_INET == sa->sa_family)
1519 salen = sizeof (struct sockaddr_in);
1521 else if (AF_INET6 == sa->sa_family)
1523 salen = sizeof (struct sockaddr_in6);
1525 ats = plugin->env->get_address_type (plugin->env->cls, sa, salen);
1526 //fprintf (stderr, "Address %s is in %s\n", GNUNET_a2s (sa,salen), GNUNET_ATS_print_network_type(ntohl(ats.value)));
1530 else if (GNUNET_NO == res)
1532 /* Cannot convert to sockaddr -> is external hostname */
1533 ats.value = htonl (GNUNET_ATS_NET_WAN);
1536 if (GNUNET_ATS_NET_UNSPECIFIED == ntohl(ats.value))
1542 s = GNUNET_new (struct Session);
1543 s->target = address->peer;
1545 s->addr = GNUNET_malloc (address->address_length);
1546 memcpy (s->addr, address->address, address->address_length);
1547 s->addrlen = address->address_length;
1548 s->ats_address_network_type = ats.value;
1549 s->put_paused = GNUNET_NO;
1550 s->put_tmp_disconnecting = GNUNET_NO;
1551 s->put_tmp_disconnected = GNUNET_NO;
1552 client_start_session_timeout (s);
1554 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1555 "Created new session %p for `%s' address `%s''\n",
1557 http_common_plugin_address_to_string (NULL, plugin->protocol, s->addr, s->addrlen),
1558 GNUNET_i2s (&s->target));
1560 /* add new session */
1561 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
1563 /* initiate new connection */
1564 if (GNUNET_SYSERR == client_connect (s))
1566 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1567 "Cannot connect to peer `%s' address `%s''\n",
1568 http_common_plugin_address_to_string (NULL, plugin->protocol, s->addr, s->addrlen),
1569 GNUNET_i2s (&s->target));
1570 client_delete_session (s);
1578 * Setup http_client plugin
1580 * @param plugin the plugin handle
1581 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
1584 client_start (struct HTTP_Client_Plugin *plugin)
1586 curl_global_init (CURL_GLOBAL_ALL);
1587 plugin->curl_multi_handle = curl_multi_init ();
1589 if (NULL == plugin->curl_multi_handle)
1591 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1592 _("Could not initialize curl multi handle, failed to start %s plugin!\n"),
1594 return GNUNET_SYSERR;
1600 * Session was idle, so disconnect it
1603 client_session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1605 struct Session *s = cls;
1607 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1608 GNUNET_log (TIMEOUT_LOG,
1609 "Session %p was idle for %s, disconnecting\n",
1611 GNUNET_STRINGS_relative_time_to_string (HTTP_CLIENT_SESSION_TIMEOUT,
1614 /* call session destroy function */
1615 GNUNET_assert (GNUNET_OK == http_client_session_disconnect (s->plugin,
1621 * Start session timeout for session s
1623 * @param s the session
1626 client_start_session_timeout (struct Session *s)
1629 GNUNET_assert (NULL != s);
1630 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1631 s->timeout_task = GNUNET_SCHEDULER_add_delayed (HTTP_CLIENT_SESSION_TIMEOUT,
1632 &client_session_timeout,
1634 GNUNET_log (TIMEOUT_LOG,
1635 "Timeout for session %p set to %s\n",
1637 GNUNET_STRINGS_relative_time_to_string (HTTP_CLIENT_SESSION_TIMEOUT,
1643 * Increment session timeout due to activity for session s
1645 * param s the session
1648 client_reschedule_session_timeout (struct Session *s)
1651 GNUNET_assert (NULL != s);
1652 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1654 GNUNET_SCHEDULER_cancel (s->timeout_task);
1655 s->timeout_task = GNUNET_SCHEDULER_add_delayed (HTTP_CLIENT_SESSION_TIMEOUT,
1656 &client_session_timeout,
1658 GNUNET_log (TIMEOUT_LOG,
1659 "Timeout rescheduled for session %p set to %s\n",
1661 GNUNET_STRINGS_relative_time_to_string (HTTP_CLIENT_SESSION_TIMEOUT,
1667 * Cancel timeout due to activity for session s
1669 * param s the session
1672 client_stop_session_timeout (struct Session *s)
1674 GNUNET_assert (NULL != s);
1676 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1678 GNUNET_SCHEDULER_cancel (s->timeout_task);
1679 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1680 GNUNET_log (TIMEOUT_LOG, "Timeout stopped for session %p\n", s);
1686 * Another peer has suggested an address for this
1687 * peer and transport plugin. Check that this could be a valid
1688 * address. If so, consider adding it to the list
1691 * @param cls closure
1692 * @param addr pointer to the address
1693 * @param addrlen length of addr
1694 * @return GNUNET_OK if this is a plausible address for this peer
1698 http_client_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
1700 /* struct Plugin *plugin = cls; */
1702 /* A HTTP/S client does not have any valid address so:*/
1708 * Exit point from the plugin.
1710 * @param cls api as closure
1714 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1716 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1717 struct HTTP_Client_Plugin *plugin = api->cls;
1718 struct Session *pos;
1719 struct Session *next;
1721 if (NULL == api->cls)
1728 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1729 _("Shutting down plugin `%s'\n"),
1733 next = plugin->head;
1734 while (NULL != (pos = next))
1737 http_client_session_disconnect (plugin, pos);
1739 if (GNUNET_SCHEDULER_NO_TASK != plugin->client_perform_task)
1741 GNUNET_SCHEDULER_cancel (plugin->client_perform_task);
1742 plugin->client_perform_task = GNUNET_SCHEDULER_NO_TASK;
1746 if (NULL != plugin->curl_multi_handle)
1748 curl_multi_cleanup (plugin->curl_multi_handle);
1749 plugin->curl_multi_handle = NULL;
1751 curl_global_cleanup ();
1753 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1754 _("Shutdown for plugin `%s' complete\n"),
1757 GNUNET_free (plugin);
1766 * @param plugin the plugin handle
1767 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
1770 client_configure_plugin (struct HTTP_Client_Plugin *plugin)
1772 unsigned long long max_connections;
1774 /* Optional parameters */
1775 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg,
1777 "MAX_CONNECTIONS", &max_connections))
1778 max_connections = 128;
1779 plugin->max_connections = max_connections;
1781 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1782 _("Maximum number of connections is %u\n"),
1783 plugin->max_connections);
1789 http_plugin_address_to_string (void *cls,
1793 return http_common_plugin_address_to_string (cls, PLUGIN_NAME, addr, addrlen);
1798 * Entry point for the plugin.
1801 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1803 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1804 struct GNUNET_TRANSPORT_PluginFunctions *api;
1805 struct HTTP_Client_Plugin *plugin;
1807 if (NULL == env->receive)
1809 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1810 initialze the plugin or the API */
1811 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1813 api->address_to_string = &http_plugin_address_to_string;
1814 api->string_to_address = &http_common_plugin_string_to_address;
1815 api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
1819 plugin = GNUNET_new (struct HTTP_Client_Plugin);
1822 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
1824 api->send = &http_client_plugin_send;
1825 api->disconnect_session = &http_client_session_disconnect;
1826 api->disconnect_peer = &http_client_peer_disconnect;
1827 api->check_address = &http_client_plugin_address_suggested;
1828 api->get_session = &http_client_plugin_get_session;
1829 api->address_to_string = &http_plugin_address_to_string;
1830 api->string_to_address = &http_common_plugin_string_to_address;
1831 api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
1832 api->get_network = &http_client_get_network;
1835 plugin->name = "transport-https_client";
1836 plugin->protocol = "https";
1838 plugin->name = "transport-http_client";
1839 plugin->protocol = "http";
1841 plugin->last_tag = 1;
1842 plugin->options = 0; /* Setup options */
1844 if (GNUNET_SYSERR == client_configure_plugin (plugin))
1846 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
1851 if (GNUNET_SYSERR == client_start (plugin))
1853 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
1859 /* end of plugin_transport_http_client.c */