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 2, 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_template.c
23 * @brief template for a new transport service
24 * @author Christian Grothoff
28 #include "gnunet_constants.h"
29 #include "gnunet_protocols.h"
30 #include "gnunet_connection_lib.h"
31 #include "gnunet_server_lib.h"
32 #include "gnunet_service_lib.h"
33 #include "gnunet_statistics_service.h"
34 #include "gnunet_transport_service.h"
35 #include "gnunet_resolver_service.h"
36 #include "plugin_transport.h"
37 #include "microhttpd.h"
38 #include <curl/curl.h>
40 #define DEBUG_HTTP GNUNET_NO
43 * Text of the response sent back after the last bytes of a PUT
44 * request have been received (just to formally obey the HTTP
47 #define HTTP_PUT_RESPONSE "Thank you!"
50 * After how long do we expire an address that we
51 * learned from another peer if it is not reconfirmed
54 #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
57 * Page returned if request invalid
59 #define HTTP_ERROR_RESPONSE "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"><HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD><BODY><H1>Not Found</H1>The requested URL was not found on this server.<P><HR><ADDRESS></ADDRESS></BODY></HTML>"
62 * Timeout for a http connect
64 #define HTTP_CONNECT_TIMEOUT 30
68 * Encapsulation of all of the state of the plugin.
73 * Message to send using http
78 * Next field for linked list
80 struct HTTP_Message * next;
83 * buffer containing data to send
88 * amount of data already sent
93 * amount of data to sent
102 * Session handle for connections.
108 * Stored in a linked list.
110 struct Session *next;
113 * Pointer to the global plugin struct.
115 struct Plugin *plugin;
118 * Continuation function to call once the transmission buffer
119 * has again space available. NULL if there is no
120 * continuation to call.
122 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
125 * Closure for transmit_cont.
127 void *transmit_cont_cls;
130 * To whom are we talking to (set to our identity
131 * if we are still waiting for the welcome message)
133 struct GNUNET_PeerIdentity sender;
141 * Sender's ip address to distinguish between incoming connections
146 * Sender's ip address to distinguish between incoming connections
148 struct sockaddr_in * addr;
151 * Did we initiate the connection (GNUNET_YES) or the other peer (GNUNET_NO)?
153 unsigned int is_client;
156 * Is the connection active (GNUNET_YES) or terminated (GNUNET_NO)?
158 unsigned int is_active;
161 * At what time did we reset last_received last?
163 struct GNUNET_TIME_Absolute last_quota_update;
166 * How many bytes have we received since the "last_quota_update"
169 uint64_t last_received;
172 * Number of bytes per ms that this peer is allowed
178 * Is there a HTTP/PUT in progress?
180 unsigned int is_put_in_progress;
185 struct GNUNET_CRYPTO_HashAsciiEncoded hash;
187 struct HTTP_Message * pending_outbound_msg;;
193 * Encapsulation of all of the state of the plugin.
200 struct GNUNET_TRANSPORT_PluginEnvironment *env;
203 * Handle to the network service.
205 struct GNUNET_SERVICE_Context *service;
208 * List of open sessions.
210 struct Session *sessions;
213 * Number of active sessions
216 unsigned int session_count;
220 * Daemon for listening for new IPv4 connections.
222 static struct MHD_Daemon *http_daemon_v4;
225 * Daemon for listening for new IPv6connections.
227 static struct MHD_Daemon *http_daemon_v6;
230 * Our primary task for http daemon handling IPv4 connections
232 static GNUNET_SCHEDULER_TaskIdentifier http_task_v4;
235 * Our primary task for http daemon handling IPv6 connections
237 static GNUNET_SCHEDULER_TaskIdentifier http_task_v6;
241 * Our primary task for http daemon handling IPv6 connections
243 static GNUNET_SCHEDULER_TaskIdentifier http_task_send;
247 * Information about this plugin
249 static struct Plugin *plugin;
254 static CURLM *multi_handle;
259 static char * hostname;
262 * Our ASCII encoded, hashed peer identity
263 * This string is used to distinguish between connections and is added to the urls
265 static struct GNUNET_CRYPTO_HashAsciiEncoded my_ascii_hash_ident;
268 * Finds a http session in our linked list using peer identity as a key
269 * @param peer peeridentity
270 * @return http session corresponding to peer identity
272 static struct Session * find_session_by_pi( const struct GNUNET_PeerIdentity *peer )
274 struct Session * cur;
275 GNUNET_HashCode hc_peer;
276 GNUNET_HashCode hc_current;
278 cur = plugin->sessions;
279 hc_peer = peer->hashPubKey;
282 hc_current = cur->sender.hashPubKey;
283 if ( 0 == GNUNET_CRYPTO_hash_cmp( &hc_peer, &hc_current))
285 cur = plugin->sessions->next;
291 * Create a new session
293 * @param address address the peer is using
294 * @peer peer identity
295 * @return created session object
298 static struct Session * create_session (struct sockaddr_in *address, const struct GNUNET_PeerIdentity *peer)
300 struct sockaddr_in *addrin;
301 struct sockaddr_in6 *addrin6;
303 struct Session * ses = GNUNET_malloc ( sizeof( struct Session) );
304 ses->addr = GNUNET_malloc ( sizeof (struct sockaddr_in) );
307 ses->plugin = plugin;
309 memcpy(ses->addr, address, sizeof (struct sockaddr_in));
310 if ( AF_INET == address->sin_family)
312 ses->ip = GNUNET_malloc (INET_ADDRSTRLEN);
314 inet_ntop(addrin->sin_family,&(addrin->sin_addr),ses->ip,INET_ADDRSTRLEN);
316 if ( AF_INET6 == address->sin_family)
318 ses->ip = GNUNET_malloc (INET6_ADDRSTRLEN);
319 addrin6 = (struct sockaddr_in6 *) address;
320 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr) ,ses->ip,INET6_ADDRSTRLEN);
322 memcpy(&ses->sender, peer, sizeof (struct GNUNET_PeerIdentity));
323 GNUNET_CRYPTO_hash_to_enc(&ses->sender.hashPubKey,&(ses->hash));
324 ses->is_active = GNUNET_NO;
330 * Callback called by MHD when a connection is terminated
332 static void requestCompletedCallback (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
336 cs = *httpSessionCache;
339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection from peer `%s' was terminated\n",GNUNET_i2s(&cs->sender));
340 /* session set to inactive */
341 cs->is_active = GNUNET_NO;
342 cs->is_put_in_progress = GNUNET_NO;
348 * Check if we are allowed to connect to the given IP.
351 acceptPolicyCallback (void *cls,
352 const struct sockaddr *addr, socklen_t addr_len)
354 /* Every connection is accepted, nothing more to do here */
355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connect!\n");
362 * Process GET or PUT request received via MHD. For
363 * GET, queue response that will send back our pending
364 * messages. For PUT, process incoming data and send
365 * to GNUnet core. In either case, check if a session
366 * already exists and create a new one if not.
369 accessHandlerCallback (void *cls,
370 struct MHD_Connection *session,
374 const char *upload_data,
375 size_t * upload_data_size, void **httpSessionCache)
377 struct MHD_Response *response;
379 struct Session * cs_temp;
380 const union MHD_ConnectionInfo * conn_info;
381 struct sockaddr_in *addrin;
382 struct sockaddr_in6 *addrin6;
383 char * address = NULL;
384 struct GNUNET_PeerIdentity pi_in;
387 struct GNUNET_MessageHeader *gn_msg;
388 int send_error_to_client;
391 send_error_to_client = GNUNET_NO;
392 if ( NULL == *httpSessionCache)
394 /* check url for peer identity */
395 res = GNUNET_CRYPTO_hash_from_string ( &url[1], &(pi_in.hashPubKey));
396 if ( GNUNET_SYSERR == res )
398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident\n");
399 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
400 res = MHD_queue_response (session, MHD_HTTP_NOT_FOUND, response);
401 MHD_destroy_response (response);
405 conn_info = MHD_get_connection_info(session, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
406 /* Incoming IPv4 connection */
407 if ( AF_INET == conn_info->client_addr->sin_family)
409 address = GNUNET_malloc (INET_ADDRSTRLEN);
410 addrin = conn_info->client_addr;
411 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
413 /* Incoming IPv6 connection */
414 if ( AF_INET6 == conn_info->client_addr->sin_family)
416 address = GNUNET_malloc (INET6_ADDRSTRLEN);
417 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
418 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
420 /* find existing session for address */
422 if (plugin->session_count > 0)
424 cs = plugin->sessions;
428 /* Comparison based on ip address */
429 // res = (0 == memcmp(&(conn_info->client_addr->sin_addr),&(cs->addr->sin_addr), sizeof (struct in_addr))) ? GNUNET_YES : GNUNET_NO;
431 /* Comparison based on ip address, port number and address family */
432 // res = (0 == memcmp((conn_info->client_addr),(cs->addr), sizeof (struct sockaddr_in))) ? GNUNET_YES : GNUNET_NO;
434 /* Comparison based on PeerIdentity */
435 res = (0 == memcmp(&pi_in,&(cs->sender), sizeof (struct GNUNET_PeerIdentity))) ? GNUNET_YES : GNUNET_NO;
437 if ( GNUNET_YES == res)
439 /* existing session for this address found */
440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session `%s' found\n",address);
446 /* no existing session, create a new one*/
449 /* create new session object */
450 cs = create_session(conn_info->client_addr, &pi_in);
452 /* Insert session into linked list */
453 if ( plugin->sessions == NULL)
455 plugin->sessions = cs;
456 plugin->session_count = 1;
458 cs_temp = plugin->sessions;
459 while ( cs_temp->next != NULL )
461 cs_temp = cs_temp->next;
466 plugin->session_count++;
468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"New Session `%s' inserted, count %u \n", address, plugin->session_count);
471 if (*httpSessionCache == NULL)
473 *httpSessionCache = cs;
475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Daemon has new an incoming `%s' request from peer `%s' (`[%s]:%u')\n",method, GNUNET_i2s(&cs->sender),cs->ip,cs->addr->sin_port);
479 cs = *httpSessionCache;
481 /* Is it a PUT or a GET request */
482 if ( 0 == strcmp (MHD_HTTP_METHOD_PUT, method) )
485 if ((*upload_data_size == 0) && (cs->is_put_in_progress == GNUNET_NO))
488 cs->is_put_in_progress = GNUNET_YES;
489 cs->is_active = GNUNET_YES;
492 if ( *upload_data_size > 0 )
494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"PUT URL: `%s'\n",url);
495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"PUT Request: %lu bytes: `%s' \n", (*upload_data_size), upload_data);
497 bytes_recv = *upload_data_size ;
498 *upload_data_size = 0;
501 if (bytes_recv < sizeof (struct GNUNET_MessageHeader))
503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Message too small, is %u bytes, has to be at least %u '\n",bytes_recv, sizeof(struct GNUNET_MessageHeader));
504 send_error_to_client = GNUNET_YES;
507 if ( bytes_recv > GNUNET_SERVER_MAX_MESSAGE_SIZE)
509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Message too big, is %u bytes, maximum %u '\n",bytes_recv, GNUNET_SERVER_MAX_MESSAGE_SIZE);
510 send_error_to_client = GNUNET_YES;
513 struct GNUNET_MessageHeader * gn_msg = GNUNET_malloc (bytes_recv);
514 memcpy (gn_msg,upload_data,bytes_recv);
516 if ( ntohs(gn_msg->size) != bytes_recv )
518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Message has incorrect size, is %u bytes vs %u recieved'\n",ntohs(gn_msg->size) , bytes_recv);
519 send_error_to_client = GNUNET_YES;
522 if ( GNUNET_YES == send_error_to_client)
524 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
525 res = MHD_queue_response (session, MHD_HTTP_BAD_REQUEST, response);
526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Sent HTTP/1.1: 400 BAD REQUEST as PUT Response\n",HTTP_PUT_RESPONSE, strlen (HTTP_PUT_RESPONSE), res );
527 MHD_destroy_response (response);
528 GNUNET_free (gn_msg);
531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Recieved GNUnet message type %u size %u and payload %u \n",ntohs (gn_msg->type), ntohs (gn_msg->size), ntohs (gn_msg->size)-sizeof(struct GNUNET_MessageHeader));
533 /* forwarding message to transport */
534 plugin->env->receive(plugin->env, &(cs->sender), gn_msg, 1, cs , cs->ip, strlen(cs->ip) );
537 if ((*upload_data_size == 0) && (cs->is_put_in_progress == GNUNET_YES))
539 cs->is_put_in_progress = GNUNET_NO;
540 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
541 res = MHD_queue_response (session, MHD_HTTP_OK, response);
542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Sent HTTP/1.1: 200 OK as PUT Response\n",HTTP_PUT_RESPONSE, strlen (HTTP_PUT_RESPONSE), res );
543 MHD_destroy_response (response);
547 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Got GET Request\n");
550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"URL: `%s'\n",url);
551 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
552 res = MHD_queue_response (session, MHD_HTTP_OK, response);
553 MHD_destroy_response (response);
561 * Call MHD to process pending requests and then go back
562 * and schedule the next run.
564 static void http_daemon_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
567 * Function that queries MHD's select sets and
568 * starts the task waiting for them.
570 static GNUNET_SCHEDULER_TaskIdentifier
571 http_daemon_prepare (struct MHD_Daemon *daemon_handle)
573 GNUNET_SCHEDULER_TaskIdentifier ret;
577 struct GNUNET_NETWORK_FDSet *wrs;
578 struct GNUNET_NETWORK_FDSet *wws;
579 struct GNUNET_NETWORK_FDSet *wes;
581 unsigned long long timeout;
583 struct GNUNET_TIME_Relative tv;
588 wrs = GNUNET_NETWORK_fdset_create ();
589 wes = GNUNET_NETWORK_fdset_create ();
590 wws = GNUNET_NETWORK_fdset_create ();
592 GNUNET_assert (MHD_YES ==
593 MHD_get_fdset (daemon_handle,
598 haveto = MHD_get_timeout (daemon_handle, &timeout);
599 if (haveto == MHD_YES)
600 tv.value = (uint64_t) timeout;
602 tv = GNUNET_TIME_UNIT_FOREVER_REL;
603 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
604 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
605 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
606 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
607 GNUNET_SCHEDULER_PRIORITY_HIGH,
608 GNUNET_SCHEDULER_NO_TASK,
614 GNUNET_NETWORK_fdset_destroy (wrs);
615 GNUNET_NETWORK_fdset_destroy (wws);
616 GNUNET_NETWORK_fdset_destroy (wes);
621 * Call MHD to process pending requests and then go back
622 * and schedule the next run.
625 http_daemon_run (void *cls,
626 const struct GNUNET_SCHEDULER_TaskContext *tc)
628 struct MHD_Daemon *daemon_handle = cls;
630 if (daemon_handle == http_daemon_v4)
631 http_task_v4 = GNUNET_SCHEDULER_NO_TASK;
633 if (daemon_handle == http_daemon_v6)
634 http_task_v6 = GNUNET_SCHEDULER_NO_TASK;
636 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
641 GNUNET_assert (MHD_YES == MHD_run (daemon_handle));
642 if (daemon_handle == http_daemon_v4)
643 http_task_v4 = http_daemon_prepare (daemon_handle);
644 if (daemon_handle == http_daemon_v6)
645 http_task_v6 = http_daemon_prepare (daemon_handle);
650 * Removes a message from the linked list of messages
653 static int remove_http_message(struct Session * ses, struct HTTP_Message * msg)
655 struct HTTP_Message * cur;
656 struct HTTP_Message * next;
658 cur = ses->pending_outbound_msg;
662 return GNUNET_SYSERR;
666 ses->pending_outbound_msg = cur->next;
667 GNUNET_free (cur->buf);
673 while (cur->next!=msg)
675 if (cur->next != NULL)
678 return GNUNET_SYSERR;
681 cur->next = cur->next->next;
682 GNUNET_free (cur->next->buf);
683 GNUNET_free (cur->next);
690 static size_t send_read_callback(void *stream, size_t size, size_t nmemb, void *ptr)
692 struct Session * ses = ptr;
693 struct HTTP_Message * msg = ses->pending_outbound_msg;
694 unsigned int bytes_sent;
697 if (msg->len > (size * nmemb))
698 return CURL_READFUNC_ABORT;
700 if (( msg->pos < msg->len) && (msg->len < (size * nmemb)))
702 memcpy(stream, msg->buf, msg->len);
704 bytes_sent = msg->len;
711 static size_t send_prepare(struct Session* session );
713 static void send_execute (void *cls,
714 const struct GNUNET_SCHEDULER_TaskContext *tc)
719 struct Session * cs = cls;
721 http_task_send = GNUNET_SCHEDULER_NO_TASK;
722 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
728 mret = curl_multi_perform (multi_handle, &running);
729 //GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"send_execute %u\n", running);
735 msg = curl_multi_info_read (multi_handle, &running);
736 GNUNET_break (msg != NULL);
742 if ( (msg->data.result != CURLE_OK) &&
743 (msg->data.result != CURLE_GOT_NOTHING) )
744 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
745 _("%s failed for `%s' at %s:%d: `%s'\n"),
746 "curl_multi_perform",
750 curl_easy_strerror (msg->data.result));
753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
754 "Send to %s completed.\n", cs->ip);
755 if (GNUNET_OK != remove_http_message(cs, cs->pending_outbound_msg))
756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Message could not be removed from session `%s'", GNUNET_i2s(&cs->sender));
758 curl_easy_cleanup(cs->curl_handle);
759 cs->curl_handle=NULL;
761 /* Calling transmit continuation */
762 if ( NULL != cs->transmit_cont)
763 cs->transmit_cont (NULL,&cs->sender,GNUNET_OK);
771 while ( (running > 0) );
774 while (mret == CURLM_CALL_MULTI_PERFORM);
779 static size_t send_prepare(struct Session* session )
785 struct GNUNET_NETWORK_FDSet *grs;
786 struct GNUNET_NETWORK_FDSet *gws;
790 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"send_prepare\n");
795 mret = curl_multi_fdset (multi_handle, &rs, &ws, &es, &max);
796 if (mret != CURLM_OK)
798 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
799 _("%s failed at %s:%d: `%s'\n"),
800 "curl_multi_fdset", __FILE__, __LINE__,
801 curl_multi_strerror (mret));
804 mret = curl_multi_timeout (multi_handle, &to);
805 if (mret != CURLM_OK)
807 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
808 _("%s failed at %s:%d: `%s'\n"),
809 "curl_multi_timeout", __FILE__, __LINE__,
810 curl_multi_strerror (mret));
814 grs = GNUNET_NETWORK_fdset_create ();
815 gws = GNUNET_NETWORK_fdset_create ();
816 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
817 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
818 http_task_send = GNUNET_SCHEDULER_add_select (plugin->env->sched,
819 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
820 GNUNET_SCHEDULER_NO_TASK,
821 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
826 GNUNET_NETWORK_fdset_destroy (gws);
827 GNUNET_NETWORK_fdset_destroy (grs);
829 /* FIXME: return bytes REALLY sent */
835 * Function that can be used by the transport service to transmit
836 * a message using the plugin.
839 * @param target who should receive this message
840 * @param priority how important is the message
841 * @param msgbuf the message to transmit
842 * @param msgbuf_size number of bytes in 'msgbuf'
843 * @param timeout when should we time out
844 * @param session which session must be used (or NULL for "any")
845 * @param addr the address to use (can be NULL if the plugin
846 * is "on its own" (i.e. re-use existing TCP connection))
847 * @param addrlen length of the address in bytes
848 * @param force_address GNUNET_YES if the plugin MUST use the given address,
849 * otherwise the plugin may use other addresses or
850 * existing connections (if available)
851 * @param cont continuation to call once the message has
852 * been transmitted (or if the transport is ready
853 * for the next transmission call; or if the
854 * peer disconnected...)
855 * @param cont_cls closure for cont
856 * @return number of bytes used (on the physical network, with overheads);
857 * -1 on hard errors (i.e. address invalid); 0 is a legal value
858 * and does NOT mean that the message was not transmitted (DV)
861 http_plugin_send (void *cls,
862 const struct GNUNET_PeerIdentity *target,
865 unsigned int priority,
866 struct GNUNET_TIME_Relative timeout,
867 struct Session *session,
871 GNUNET_TRANSPORT_TransmitContinuation cont,
875 struct Session* ses_temp;
876 struct HTTP_Message * msg;
877 struct HTTP_Message * tmp;
882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport told plugin to send to peer `%s'\n",GNUNET_i2s(target));
884 /* find session for peer */
885 ses = find_session_by_pi (target);
887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Existing session for peer `%s' found\n", GNUNET_i2s(target));
890 /* create new session object */
892 /*FIXME: what is const void * really? Assuming struct sockaddr_in * ! */
893 ses = create_session((struct sockaddr_in *) addr, target);
894 ses->is_active = GNUNET_YES;
895 ses->transmit_cont = cont;
897 /* Insert session into linked list */
898 if ( plugin->sessions == NULL)
900 plugin->sessions = ses;
901 plugin->session_count = 1;
903 ses_temp = plugin->sessions;
904 while ( ses_temp->next != NULL )
906 ses_temp = ses_temp->next;
908 if (ses_temp != ses )
910 ses_temp->next = ses;
911 plugin->session_count++;
913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"New Session `%s' inserted, count %u \n", GNUNET_i2s(target), plugin->session_count);
916 ses->curl_handle = curl_easy_init();
917 if( NULL == ses->curl_handle)
919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Getting cURL handle failed\n");
923 url = GNUNET_malloc( 7 + strlen(ses->ip) + 7 + strlen ((char *) &(ses->hash)) + 1);
924 /* FIXME: use correct port number */
925 GNUNET_asprintf(&url,"http://%s:%u/%s",ses->ip,12389, (char *) &(ses->hash));
928 ses->transmit_cont = cont;
930 /* setting up message */
931 msg = GNUNET_malloc (sizeof (struct HTTP_Message));
933 msg->len = msgbuf_size;
935 msg->buf = GNUNET_malloc (msgbuf_size);
936 memcpy (msg->buf,msgbuf, msgbuf_size);
938 /* insert created message in list of pending messages */
940 if (ses->pending_outbound_msg == NULL)
942 ses->pending_outbound_msg = msg;
944 tmp = ses->pending_outbound_msg;
945 while ( NULL != tmp->next)
952 struct HTTP_Message * msg2 = GNUNET_malloc (sizeof (struct HTTP_Message));
954 if (ses->pending_outbound_msg == NULL)
956 ses->pending_outbound_msg = msg2;
958 tmp = ses->pending_outbound_msg;
959 while ( NULL != tmp->next)
966 /* curl_easy_setopt(ses->curl_handle, CURLOPT_VERBOSE, 1L); */
967 curl_easy_setopt(ses->curl_handle, CURLOPT_URL, url);
968 curl_easy_setopt(ses->curl_handle, CURLOPT_PUT, 1L);
969 curl_easy_setopt(ses->curl_handle, CURLOPT_READFUNCTION, send_read_callback);
970 curl_easy_setopt(ses->curl_handle, CURLOPT_READDATA, ses);
971 curl_easy_setopt(ses->curl_handle, CURLOPT_INFILESIZE_LARGE, (curl_off_t) msg->len);
972 curl_easy_setopt(ses->curl_handle, CURLOPT_TIMEOUT, (timeout.value / 1000 ));
973 curl_easy_setopt(ses->curl_handle, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
975 mret = curl_multi_add_handle(multi_handle, ses->curl_handle);
976 if (mret != CURLM_OK)
978 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
979 _("%s failed at %s:%d: `%s'\n"),
980 "curl_multi_add_handle", __FILE__, __LINE__,
981 curl_multi_strerror (mret));
984 bytes_sent = send_prepare (ses );
992 * Function that can be used to force the plugin to disconnect
993 * from the given peer and cancel all previous transmissions
994 * (and their continuationc).
997 * @param target peer from which to disconnect
1000 http_plugin_disconnect (void *cls,
1001 const struct GNUNET_PeerIdentity *target)
1003 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_disconnect\n");
1004 // struct Plugin *plugin = cls;
1010 * Convert the transports address to a nice, human-readable
1013 * @param cls closure
1014 * @param type name of the transport that generated the address
1015 * @param addr one of the addresses of the host, NULL for the last address
1016 * the specific address format depends on the transport
1017 * @param addrlen length of the address
1018 * @param numeric should (IP) addresses be displayed in numeric form?
1019 * @param timeout after how long should we give up?
1020 * @param asc function to call on each string
1021 * @param asc_cls closure for asc
1024 http_plugin_address_pretty_printer (void *cls,
1029 struct GNUNET_TIME_Relative timeout,
1030 GNUNET_TRANSPORT_AddressStringCallback
1033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_pretty_printer\n");
1034 asc (asc_cls, NULL);
1040 * Another peer has suggested an address for this
1041 * peer and transport plugin. Check that this could be a valid
1042 * address. If so, consider adding it to the list
1045 * @param cls closure
1046 * @param addr pointer to the address
1047 * @param addrlen length of addr
1048 * @return GNUNET_OK if this is a plausible address for this peer
1052 http_plugin_address_suggested (void *cls,
1053 void *addr, size_t addrlen)
1055 /* struct Plugin *plugin = cls; */
1057 /* check if the address is plausible; if so,
1058 add it to our list! */
1059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_suggested\n");
1065 * Function called for a quick conversion of the binary address to
1066 * a numeric address. Note that the caller must not free the
1067 * address and that the next call to this function is allowed
1068 * to override the address again.
1070 * @param cls closure
1071 * @param addr binary address
1072 * @param addrlen length of the address
1073 * @return string representing the same address
1076 http_plugin_address_to_string (void *cls,
1080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_to_string\n");
1086 * Exit point from the plugin.
1089 libgnunet_plugin_transport_http_done (void *cls)
1091 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1092 struct Plugin *plugin = api->cls;
1093 struct Session * cs;
1094 struct Session * cs_next;
1097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unloading http plugin...\n");
1099 if ( http_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1101 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_v4);
1102 http_task_v4 = GNUNET_SCHEDULER_NO_TASK;
1105 if ( http_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1107 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_v6);
1108 http_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1111 if ( http_task_send != GNUNET_SCHEDULER_NO_TASK)
1113 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_send);
1114 http_task_send = GNUNET_SCHEDULER_NO_TASK;
1117 if (http_daemon_v4 != NULL)
1119 MHD_stop_daemon (http_daemon_v4);
1120 http_daemon_v4 = NULL;
1122 if (http_daemon_v6 != NULL)
1124 MHD_stop_daemon (http_daemon_v6);
1125 http_daemon_v6 = NULL;
1128 mret = curl_multi_cleanup(multi_handle);
1129 if ( CURLM_OK != mret)
1130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed");
1132 /* free all sessions */
1133 cs = plugin->sessions;
1137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing session to `%s'\n",cs->ip);
1140 /* freeing messages */
1141 struct HTTP_Message *cur;
1142 struct HTTP_Message *tmp;
1143 cur = cs->pending_outbound_msg;
1148 if (NULL != cur->buf)
1149 GNUNET_free (cur->buf);
1155 GNUNET_free (cs->ip);
1156 GNUNET_free (cs->addr);
1158 plugin->session_count--;
1163 /* GNUNET_SERVICE_stop (plugin->service); */
1164 GNUNET_free (plugin);
1171 * Entry point for the plugin.
1174 libgnunet_plugin_transport_http_init (void *cls)
1176 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1177 struct GNUNET_TRANSPORT_PluginFunctions *api;
1178 struct GNUNET_SERVICE_Context *service;
1179 unsigned int timeout;
1180 struct GNUNET_TIME_Relative gn_timeout;
1181 long long unsigned int port;
1183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
1187 service = GNUNET_SERVICE_start ("transport-http", env->sched, env->cfg);
1188 if (service == NULL)
1190 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, "", _
1191 ("Failed to start service for `%s' transport plugin.\n"),
1197 plugin = GNUNET_malloc (sizeof (struct Plugin));
1199 plugin->sessions = NULL;
1200 plugin->service = service;
1201 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1203 api->send = &http_plugin_send;
1204 api->disconnect = &http_plugin_disconnect;
1205 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1206 api->check_address = &http_plugin_address_suggested;
1207 api->address_to_string = &http_plugin_address_to_string;
1209 hostname = GNUNET_RESOLVER_local_fqdn_get ();
1211 /* Hashing our identity to use it in URLs */
1212 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &my_ascii_hash_ident);
1214 /* Reading port number from config file */
1216 GNUNET_CONFIGURATION_get_value_number (env->cfg,
1222 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1225 ("Require valid port number for transport plugin `%s' in configuration!\n"),
1227 libgnunet_plugin_transport_http_done (api);
1231 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1232 timeout = ( gn_timeout.value / 1000);
1233 if ((http_daemon_v4 == NULL) && (http_daemon_v6 == NULL) && (port != 0))
1235 http_daemon_v6 = MHD_start_daemon (MHD_USE_IPv6,
1237 &acceptPolicyCallback,
1238 NULL , &accessHandlerCallback, NULL,
1239 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1240 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1241 MHD_OPTION_CONNECTION_TIMEOUT, timeout,
1242 /* FIXME: set correct limit */
1243 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1244 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1246 http_daemon_v4 = MHD_start_daemon (MHD_NO_FLAG,
1248 &acceptPolicyCallback,
1249 NULL , &accessHandlerCallback, NULL,
1250 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1251 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1252 MHD_OPTION_CONNECTION_TIMEOUT, timeout,
1253 /* FIXME: set correct limit */
1254 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1255 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1258 if (http_daemon_v4 != NULL)
1259 http_task_v4 = http_daemon_prepare (http_daemon_v4);
1260 if (http_daemon_v6 != NULL)
1261 http_task_v6 = http_daemon_prepare (http_daemon_v6);
1263 if (http_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
1265 if (http_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
1268 /* Initializing cURL */
1269 multi_handle = curl_multi_init();
1270 if ( NULL == multi_handle )
1272 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1274 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
1276 libgnunet_plugin_transport_http_done (api);
1282 /* end of plugin_transport_template.c */