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.
82 * Session handle for connections.
88 * Stored in a linked list.
93 * Pointer to the global plugin struct.
95 struct Plugin *plugin;
98 * Continuation function to call once the transmission buffer
99 * has again space available. NULL if there is no
100 * continuation to call.
102 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
105 * Closure for transmit_cont.
107 void *transmit_cont_cls;
110 * To whom are we talking to (set to our identity
111 * if we are still waiting for the welcome message)
113 struct GNUNET_PeerIdentity sender;
121 * Sender's ip address to distinguish between incoming connections
126 * Sender's ip address to distinguish between incoming connections
128 struct sockaddr_in * addr;
131 * Did we initiate the connection (GNUNET_YES) or the other peer (GNUNET_NO)?
133 unsigned int is_client;
136 * Is the connection active (GNUNET_YES) or terminated (GNUNET_NO)?
138 unsigned int is_active;
141 * At what time did we reset last_received last?
143 struct GNUNET_TIME_Absolute last_quota_update;
146 * How many bytes have we received since the "last_quota_update"
149 uint64_t last_received;
152 * Number of bytes per ms that this peer is allowed
158 * Is there a HTTP/PUT in progress?
160 unsigned int is_put_in_progress;
165 struct GNUNET_CRYPTO_HashAsciiEncoded hash;
173 * Encapsulation of all of the state of the plugin.
180 struct GNUNET_TRANSPORT_PluginEnvironment *env;
183 * Handle to the network service.
185 struct GNUNET_SERVICE_Context *service;
188 * List of open sessions.
190 struct Session *sessions;
193 * Number of active sessions
196 unsigned int session_count;
200 * Daemon for listening for new IPv4 connections.
202 static struct MHD_Daemon *http_daemon_v4;
205 * Daemon for listening for new IPv6connections.
207 static struct MHD_Daemon *http_daemon_v6;
210 * Our primary task for http daemon handling IPv4 connections
212 static GNUNET_SCHEDULER_TaskIdentifier http_task_v4;
215 * Our primary task for http daemon handling IPv6 connections
217 static GNUNET_SCHEDULER_TaskIdentifier http_task_v6;
221 * Our primary task for http daemon handling IPv6 connections
223 static GNUNET_SCHEDULER_TaskIdentifier http_task_send;
227 * Information about this plugin
229 static struct Plugin *plugin;
234 static CURLM *multi_handle;
239 static char * hostname;
242 * Our ASCII encoded, hashed peer identity
243 * This string is used to distinguish between connections and is added to the urls
245 static struct GNUNET_CRYPTO_HashAsciiEncoded my_ascii_hash_ident;
247 static char buf[2048];
250 * Message-Packet header.
255 * size of the message, in bytes, including this header.
257 struct GNUNET_MessageHeader header;
260 * What is the identity of the sender (GNUNET_hash of public key)
262 struct GNUNET_PeerIdentity sender;
267 * Finds a http session in our linked list using peer identity as a key
268 * @param peer peeridentity
269 * @return http session corresponding to peer identity
271 static struct Session * find_session_by_pi( const struct GNUNET_PeerIdentity *peer )
273 struct Session * cur;
274 GNUNET_HashCode hc_peer;
275 GNUNET_HashCode hc_current;
277 cur = plugin->sessions;
278 hc_peer = peer->hashPubKey;
281 hc_current = cur->sender.hashPubKey;
282 if ( 0 == GNUNET_CRYPTO_hash_cmp( &hc_peer, &hc_current))
284 cur = plugin->sessions->next;
290 * Create a new session
292 * @param address address the peer is using
293 * @peer peer identity
294 * @return created session object
297 static struct Session * create_session (struct sockaddr_in *address, const struct GNUNET_PeerIdentity *peer)
299 struct sockaddr_in *addrin;
300 struct sockaddr_in6 *addrin6;
302 struct Session * ses = GNUNET_malloc ( sizeof( struct Session) );
303 ses->addr = GNUNET_malloc ( sizeof (struct sockaddr_in) );
306 ses->plugin = plugin;
308 memcpy(ses->addr, address, sizeof (struct sockaddr_in));
309 if ( AF_INET == address->sin_family)
311 ses->ip = GNUNET_malloc (INET_ADDRSTRLEN);
313 inet_ntop(addrin->sin_family,&(addrin->sin_addr),ses->ip,INET_ADDRSTRLEN);
315 if ( AF_INET6 == address->sin_family)
317 ses->ip = GNUNET_malloc (INET6_ADDRSTRLEN);
318 addrin6 = (struct sockaddr_in6 *) address;
319 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr) ,ses->ip,INET6_ADDRSTRLEN);
321 memcpy(&ses->sender, peer, sizeof (struct GNUNET_PeerIdentity));
322 GNUNET_CRYPTO_hash_to_enc(&ses->sender.hashPubKey,&(ses->hash));
323 ses->is_active = GNUNET_NO;
329 * Callback called by MHD when a connection is terminated
331 static void requestCompletedCallback (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
335 cs = *httpSessionCache;
338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection from peer `%s' was terminated\n",GNUNET_i2s(&cs->sender));
339 /* session set to inactive */
340 cs->is_active = GNUNET_NO;
341 cs->is_put_in_progress = GNUNET_NO;
347 * Check if we are allowed to connect to the given IP.
350 acceptPolicyCallback (void *cls,
351 const struct sockaddr *addr, socklen_t addr_len)
353 /* Every connection is accepted, nothing more to do here */
354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connect!\n");
361 * Process GET or PUT request received via MHD. For
362 * GET, queue response that will send back our pending
363 * messages. For PUT, process incoming data and send
364 * to GNUnet core. In either case, check if a session
365 * already exists and create a new one if not.
368 accessHandlerCallback (void *cls,
369 struct MHD_Connection *session,
373 const char *upload_data,
374 size_t * upload_data_size, void **httpSessionCache)
376 struct MHD_Response *response;
378 struct Session * cs_temp;
379 const union MHD_ConnectionInfo * conn_info;
380 struct sockaddr_in *addrin;
381 struct sockaddr_in6 *addrin6;
382 char * address = NULL;
383 struct GNUNET_PeerIdentity pi_in;
386 struct GNUNET_MessageHeader *gn_msg;
387 int send_error_to_client;
390 send_error_to_client = GNUNET_NO;
391 if ( NULL == *httpSessionCache)
393 /* check url for peer identity */
394 res = GNUNET_CRYPTO_hash_from_string ( &url[1], &(pi_in.hashPubKey));
395 if ( GNUNET_SYSERR == res )
397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident\n");
398 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
399 res = MHD_queue_response (session, MHD_HTTP_NOT_FOUND, response);
400 MHD_destroy_response (response);
404 conn_info = MHD_get_connection_info(session, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
405 /* Incoming IPv4 connection */
406 if ( AF_INET == conn_info->client_addr->sin_family)
408 address = GNUNET_malloc (INET_ADDRSTRLEN);
409 addrin = conn_info->client_addr;
410 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
412 /* Incoming IPv6 connection */
413 if ( AF_INET6 == conn_info->client_addr->sin_family)
415 address = GNUNET_malloc (INET6_ADDRSTRLEN);
416 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
417 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
419 /* find existing session for address */
421 if (plugin->session_count > 0)
423 cs = plugin->sessions;
427 /* Comparison based on ip address */
428 // res = (0 == memcmp(&(conn_info->client_addr->sin_addr),&(cs->addr->sin_addr), sizeof (struct in_addr))) ? GNUNET_YES : GNUNET_NO;
430 /* Comparison based on ip address, port number and address family */
431 // res = (0 == memcmp((conn_info->client_addr),(cs->addr), sizeof (struct sockaddr_in))) ? GNUNET_YES : GNUNET_NO;
433 /* Comparison based on PeerIdentity */
434 res = (0 == memcmp(&pi_in,&(cs->sender), sizeof (struct GNUNET_PeerIdentity))) ? GNUNET_YES : GNUNET_NO;
436 if ( GNUNET_YES == res)
438 /* existing session for this address found */
439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session `%s' found\n",address);
445 /* no existing session, create a new one*/
448 /* create new session object */
449 cs = create_session(conn_info->client_addr, &pi_in);
451 /* Insert session into linked list */
452 if ( plugin->sessions == NULL)
454 plugin->sessions = cs;
455 plugin->session_count = 1;
457 cs_temp = plugin->sessions;
458 while ( cs_temp->next != NULL )
460 cs_temp = cs_temp->next;
465 plugin->session_count++;
467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"New Session `%s' inserted, count %u \n", address, plugin->session_count);
470 if (*httpSessionCache == NULL)
472 *httpSessionCache = cs;
474 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);
478 cs = *httpSessionCache;
480 /* Is it a PUT or a GET request */
481 if ( 0 == strcmp (MHD_HTTP_METHOD_PUT, method) )
484 if ((*upload_data_size == 0) && (cs->is_put_in_progress == GNUNET_NO))
487 cs->is_put_in_progress = GNUNET_YES;
488 cs->is_active = GNUNET_YES;
491 if ( *upload_data_size > 0 )
493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"PUT URL: `%s'\n",url);
494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"PUT Request: %lu bytes: `%s' \n", (*upload_data_size), upload_data);
496 bytes_recv = *upload_data_size ;
497 *upload_data_size = 0;
500 if (bytes_recv < sizeof (struct GNUNET_MessageHeader))
502 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));
503 send_error_to_client = GNUNET_YES;
506 if ( bytes_recv > GNUNET_SERVER_MAX_MESSAGE_SIZE)
508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Message too big, is %u bytes, maximum %u '\n",bytes_recv, GNUNET_SERVER_MAX_MESSAGE_SIZE);
509 send_error_to_client = GNUNET_YES;
512 struct GNUNET_MessageHeader * gn_msg = GNUNET_malloc (bytes_recv);
513 memcpy (gn_msg,upload_data,bytes_recv);
515 if ( ntohs(gn_msg->size) != bytes_recv )
517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Message has incorrect size, is %u bytes vs %u recieved'\n",ntohs(gn_msg->size) , bytes_recv);
518 send_error_to_client = GNUNET_YES;
521 if ( GNUNET_YES == send_error_to_client)
523 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
524 res = MHD_queue_response (session, MHD_HTTP_BAD_REQUEST, response);
525 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 );
526 MHD_destroy_response (response);
527 GNUNET_free (gn_msg);
530 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));
532 /* forwarding message to transport */
533 plugin->env->receive(plugin->env, &(cs->sender), gn_msg, 1, cs , cs->ip, strlen(cs->ip) );
536 if ((*upload_data_size == 0) && (cs->is_put_in_progress == GNUNET_YES))
538 cs->is_put_in_progress = GNUNET_NO;
539 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
540 res = MHD_queue_response (session, MHD_HTTP_OK, response);
541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Sent HTTP/1.1: 200 OK as PUT Response\n",HTTP_PUT_RESPONSE, strlen (HTTP_PUT_RESPONSE), res );
542 MHD_destroy_response (response);
546 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Got GET Request\n");
549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"URL: `%s'\n",url);
550 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
551 res = MHD_queue_response (session, MHD_HTTP_OK, response);
552 MHD_destroy_response (response);
560 * Call MHD to process pending requests and then go back
561 * and schedule the next run.
563 static void http_daemon_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
566 * Function that queries MHD's select sets and
567 * starts the task waiting for them.
569 static GNUNET_SCHEDULER_TaskIdentifier
570 http_daemon_prepare (struct MHD_Daemon *daemon_handle)
572 GNUNET_SCHEDULER_TaskIdentifier ret;
576 struct GNUNET_NETWORK_FDSet *wrs;
577 struct GNUNET_NETWORK_FDSet *wws;
578 struct GNUNET_NETWORK_FDSet *wes;
580 unsigned long long timeout;
582 struct GNUNET_TIME_Relative tv;
587 wrs = GNUNET_NETWORK_fdset_create ();
588 wes = GNUNET_NETWORK_fdset_create ();
589 wws = GNUNET_NETWORK_fdset_create ();
591 GNUNET_assert (MHD_YES ==
592 MHD_get_fdset (daemon_handle,
597 haveto = MHD_get_timeout (daemon_handle, &timeout);
598 if (haveto == MHD_YES)
599 tv.value = (uint64_t) timeout;
601 tv = GNUNET_TIME_UNIT_FOREVER_REL;
602 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
603 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
604 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
605 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
606 GNUNET_SCHEDULER_PRIORITY_HIGH,
607 GNUNET_SCHEDULER_NO_TASK,
613 GNUNET_NETWORK_fdset_destroy (wrs);
614 GNUNET_NETWORK_fdset_destroy (wws);
615 GNUNET_NETWORK_fdset_destroy (wes);
620 * Call MHD to process pending requests and then go back
621 * and schedule the next run.
624 http_daemon_run (void *cls,
625 const struct GNUNET_SCHEDULER_TaskContext *tc)
627 struct MHD_Daemon *daemon_handle = cls;
629 if (daemon_handle == http_daemon_v4)
630 http_task_v4 = GNUNET_SCHEDULER_NO_TASK;
632 if (daemon_handle == http_daemon_v6)
633 http_task_v6 = GNUNET_SCHEDULER_NO_TASK;
635 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
640 GNUNET_assert (MHD_YES == MHD_run (daemon_handle));
641 if (daemon_handle == http_daemon_v4)
642 http_task_v4 = http_daemon_prepare (daemon_handle);
643 if (daemon_handle == http_daemon_v6)
644 http_task_v6 = http_daemon_prepare (daemon_handle);
648 static size_t send_read_callback(void *stream, size_t size, size_t nmemb, void *ptr)
650 struct Session * ses = ptr;
651 struct CBC * cbc = &(ses->cbc);
653 if (cbc->len > (size * nmemb))
654 return CURL_READFUNC_ABORT;
656 if (( cbc->pos == cbc->len) && (cbc->len < (size * nmemb)))
658 memcpy(stream, cbc->buf, cbc->len);
664 static size_t send_prepare(struct Session* session );
666 static void send_execute (void *cls,
667 const struct GNUNET_SCHEDULER_TaskContext *tc)
672 struct Session * cs = cls;
674 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"send_execute\n");
676 http_task_send = GNUNET_SCHEDULER_NO_TASK;
677 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
683 mret = curl_multi_perform (multi_handle, &running);
684 //GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"send_execute %u\n", running);
690 msg = curl_multi_info_read (multi_handle, &running);
691 GNUNET_break (msg != NULL);
697 if ( (msg->data.result != CURLE_OK) &&
698 (msg->data.result != CURLE_GOT_NOTHING) )
699 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
700 _("%s failed for `%s' at %s:%d: `%s'\n"),
701 "curl_multi_perform",
705 curl_easy_strerror (msg->data.result));
708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
709 "Send to %s completed.\n", cs->ip);
710 /* Calling transmit continuation */
711 if ( NULL != cs->transmit_cont)
712 cs->transmit_cont (NULL,&cs->sender,GNUNET_OK);
714 curl_easy_cleanup(cs->curl_handle);
715 cs->curl_handle=NULL;
723 while ( (running > 0) );
726 while (mret == CURLM_CALL_MULTI_PERFORM);
731 static size_t send_prepare(struct Session* session )
737 struct GNUNET_NETWORK_FDSet *grs;
738 struct GNUNET_NETWORK_FDSet *gws;
742 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"send_prepare\n");
747 mret = curl_multi_fdset (multi_handle, &rs, &ws, &es, &max);
748 if (mret != CURLM_OK)
750 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
751 _("%s failed at %s:%d: `%s'\n"),
752 "curl_multi_fdset", __FILE__, __LINE__,
753 curl_multi_strerror (mret));
756 mret = curl_multi_timeout (multi_handle, &to);
757 if (mret != CURLM_OK)
759 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
760 _("%s failed at %s:%d: `%s'\n"),
761 "curl_multi_timeout", __FILE__, __LINE__,
762 curl_multi_strerror (mret));
766 grs = GNUNET_NETWORK_fdset_create ();
767 gws = GNUNET_NETWORK_fdset_create ();
768 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
769 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
770 http_task_send = GNUNET_SCHEDULER_add_select (plugin->env->sched,
771 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
772 GNUNET_SCHEDULER_NO_TASK,
773 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
778 GNUNET_NETWORK_fdset_destroy (gws);
779 GNUNET_NETWORK_fdset_destroy (grs);
781 /* FIXME: return bytes REALLY sent */
787 * Function that can be used by the transport service to transmit
788 * a message using the plugin.
791 * @param target who should receive this message
792 * @param priority how important is the message
793 * @param msgbuf the message to transmit
794 * @param msgbuf_size number of bytes in 'msgbuf'
795 * @param timeout when should we time out
796 * @param session which session must be used (or NULL for "any")
797 * @param addr the address to use (can be NULL if the plugin
798 * is "on its own" (i.e. re-use existing TCP connection))
799 * @param addrlen length of the address in bytes
800 * @param force_address GNUNET_YES if the plugin MUST use the given address,
801 * otherwise the plugin may use other addresses or
802 * existing connections (if available)
803 * @param cont continuation to call once the message has
804 * been transmitted (or if the transport is ready
805 * for the next transmission call; or if the
806 * peer disconnected...)
807 * @param cont_cls closure for cont
808 * @return number of bytes used (on the physical network, with overheads);
809 * -1 on hard errors (i.e. address invalid); 0 is a legal value
810 * and does NOT mean that the message was not transmitted (DV)
813 http_plugin_send (void *cls,
814 const struct GNUNET_PeerIdentity *target,
817 unsigned int priority,
818 struct GNUNET_TIME_Relative timeout,
819 struct Session *session,
823 GNUNET_TRANSPORT_TransmitContinuation cont,
827 struct Session* ses_temp;
832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport told plugin to send to peer `%s'\n",GNUNET_i2s(target));
834 /* find session for peer */
835 ses = find_session_by_pi (target);
837 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Existing session for peer `%s' found\n", GNUNET_i2s(target));
840 /* create new session object */
842 /*FIXME: what is const void * really? Assuming struct sockaddr_in * ! */
843 ses = create_session((struct sockaddr_in *) addr, target);
844 ses->is_active = GNUNET_YES;
845 ses->transmit_cont = cont;
847 /* Insert session into linked list */
848 if ( plugin->sessions == NULL)
850 plugin->sessions = ses;
851 plugin->session_count = 1;
853 ses_temp = plugin->sessions;
854 while ( ses_temp->next != NULL )
856 ses_temp = ses_temp->next;
858 if (ses_temp != ses )
860 ses_temp->next = ses;
861 plugin->session_count++;
863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"New Session `%s' inserted, count %u \n", GNUNET_i2s(target), plugin->session_count);
866 ses->curl_handle = curl_easy_init();
867 if( NULL == ses->curl_handle)
869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Getting cURL handle failed\n");
873 url = GNUNET_malloc( 7 + strlen(ses->ip) + 7 + strlen ((char *) &(ses->hash)) + 1);
874 /* FIXME: use correct port number */
875 GNUNET_asprintf(&url,"http://%s:%u/%s",ses->ip,12389, (char *) &(ses->hash));
878 ses->transmit_cont = cont;
880 (ses->cbc).len = msgbuf_size;
881 (ses->cbc).buf = buf;
882 memcpy(ses->cbc.buf,msgbuf,msgbuf_size);
884 /* curl_easy_setopt(ses->curl_handle, CURLOPT_VERBOSE, 1L); */
885 curl_easy_setopt(ses->curl_handle, CURLOPT_URL, url);
886 curl_easy_setopt(ses->curl_handle, CURLOPT_PUT, 1L);
887 curl_easy_setopt(ses->curl_handle, CURLOPT_READFUNCTION, send_read_callback);
888 curl_easy_setopt(ses->curl_handle, CURLOPT_READDATA, ses);
889 curl_easy_setopt(ses->curl_handle, CURLOPT_INFILESIZE_LARGE, (curl_off_t) (ses->cbc).len);
890 curl_easy_setopt(ses->curl_handle, CURLOPT_TIMEOUT, (timeout.value / 1000 ));
891 curl_easy_setopt(ses->curl_handle, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
893 mret = curl_multi_add_handle(multi_handle, ses->curl_handle);
894 if (mret != CURLM_OK)
896 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
897 _("%s failed at %s:%d: `%s'\n"),
898 "curl_multi_add_handle", __FILE__, __LINE__,
899 curl_multi_strerror (mret));
902 bytes_sent = send_prepare (ses );
910 * Function that can be used to force the plugin to disconnect
911 * from the given peer and cancel all previous transmissions
912 * (and their continuationc).
915 * @param target peer from which to disconnect
918 http_plugin_disconnect (void *cls,
919 const struct GNUNET_PeerIdentity *target)
921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_disconnect\n");
922 // struct Plugin *plugin = cls;
928 * Convert the transports address to a nice, human-readable
932 * @param type name of the transport that generated the address
933 * @param addr one of the addresses of the host, NULL for the last address
934 * the specific address format depends on the transport
935 * @param addrlen length of the address
936 * @param numeric should (IP) addresses be displayed in numeric form?
937 * @param timeout after how long should we give up?
938 * @param asc function to call on each string
939 * @param asc_cls closure for asc
942 http_plugin_address_pretty_printer (void *cls,
947 struct GNUNET_TIME_Relative timeout,
948 GNUNET_TRANSPORT_AddressStringCallback
951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_pretty_printer\n");
958 * Another peer has suggested an address for this
959 * peer and transport plugin. Check that this could be a valid
960 * address. If so, consider adding it to the list
964 * @param addr pointer to the address
965 * @param addrlen length of addr
966 * @return GNUNET_OK if this is a plausible address for this peer
970 http_plugin_address_suggested (void *cls,
971 void *addr, size_t addrlen)
973 /* struct Plugin *plugin = cls; */
975 /* check if the address is plausible; if so,
976 add it to our list! */
977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_suggested\n");
983 * Function called for a quick conversion of the binary address to
984 * a numeric address. Note that the caller must not free the
985 * address and that the next call to this function is allowed
986 * to override the address again.
989 * @param addr binary address
990 * @param addrlen length of the address
991 * @return string representing the same address
994 http_plugin_address_to_string (void *cls,
998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_to_string\n");
1004 * Exit point from the plugin.
1007 libgnunet_plugin_transport_http_done (void *cls)
1009 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1010 struct Plugin *plugin = api->cls;
1011 struct Session * cs;
1012 struct Session * cs_next;
1015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unloading http plugin...\n");
1017 if ( http_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1019 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_v4);
1020 http_task_v4 = GNUNET_SCHEDULER_NO_TASK;
1023 if ( http_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1025 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_v6);
1026 http_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1029 if ( http_task_send != GNUNET_SCHEDULER_NO_TASK)
1031 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_send);
1032 http_task_send = GNUNET_SCHEDULER_NO_TASK;
1035 if (http_daemon_v4 != NULL)
1037 MHD_stop_daemon (http_daemon_v4);
1038 http_daemon_v4 = NULL;
1040 if (http_daemon_v6 != NULL)
1042 MHD_stop_daemon (http_daemon_v6);
1043 http_daemon_v6 = NULL;
1046 mret = curl_multi_cleanup(multi_handle);
1047 if ( CURLM_OK != mret)
1048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed");
1050 /* free all sessions */
1051 cs = plugin->sessions;
1055 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing session to `%s'\n",cs->ip);
1058 GNUNET_free (cs->ip);
1059 GNUNET_free (cs->addr);
1061 plugin->session_count--;
1066 /* GNUNET_SERVICE_stop (plugin->service); */
1067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing plugin\n",cs->ip);
1068 GNUNET_free (plugin);
1075 * Entry point for the plugin.
1078 libgnunet_plugin_transport_http_init (void *cls)
1080 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1081 struct GNUNET_TRANSPORT_PluginFunctions *api;
1082 struct GNUNET_SERVICE_Context *service;
1083 unsigned int timeout;
1084 struct GNUNET_TIME_Relative gn_timeout;
1085 long long unsigned int port;
1087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
1091 service = GNUNET_SERVICE_start ("transport-http", env->sched, env->cfg);
1092 if (service == NULL)
1094 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, "", _
1095 ("Failed to start service for `%s' transport plugin.\n"),
1101 plugin = GNUNET_malloc (sizeof (struct Plugin));
1103 plugin->sessions = NULL;
1104 plugin->service = service;
1105 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1107 api->send = &http_plugin_send;
1108 api->disconnect = &http_plugin_disconnect;
1109 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1110 api->check_address = &http_plugin_address_suggested;
1111 api->address_to_string = &http_plugin_address_to_string;
1113 hostname = GNUNET_RESOLVER_local_fqdn_get ();
1115 /* Hashing our identity to use it in URLs */
1116 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &my_ascii_hash_ident);
1118 /* Reading port number from config file */
1120 GNUNET_CONFIGURATION_get_value_number (env->cfg,
1126 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1129 ("Require valid port number for transport plugin `%s' in configuration!\n"),
1131 libgnunet_plugin_transport_http_done (api);
1135 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1136 timeout = ( gn_timeout.value / 1000);
1137 if ((http_daemon_v4 == NULL) && (http_daemon_v6 == NULL) && (port != 0))
1139 http_daemon_v6 = MHD_start_daemon (MHD_USE_IPv6,
1141 &acceptPolicyCallback,
1142 NULL , &accessHandlerCallback, NULL,
1143 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1144 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1145 MHD_OPTION_CONNECTION_TIMEOUT, timeout,
1146 /* FIXME: set correct limit */
1147 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1148 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1150 http_daemon_v4 = MHD_start_daemon (MHD_NO_FLAG,
1152 &acceptPolicyCallback,
1153 NULL , &accessHandlerCallback, NULL,
1154 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1155 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1156 MHD_OPTION_CONNECTION_TIMEOUT, timeout,
1157 /* FIXME: set correct limit */
1158 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1159 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1162 if (http_daemon_v4 != NULL)
1163 http_task_v4 = http_daemon_prepare (http_daemon_v4);
1164 if (http_daemon_v6 != NULL)
1165 http_task_v6 = http_daemon_prepare (http_daemon_v6);
1167 if (http_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
1169 if (http_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1170 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
1172 /* Initializing cURL */
1173 multi_handle = curl_multi_init();
1174 if ( NULL == multi_handle )
1176 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1178 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
1180 libgnunet_plugin_transport_http_done (api);
1186 /* end of plugin_transport_template.c */