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;
267 struct GNUNET_TIME_Relative timeout;
270 * Finds a http session in our linked list using peer identity as a key
271 * @param peer peeridentity
272 * @return http session corresponding to peer identity
274 static struct Session * find_session_by_pi( const struct GNUNET_PeerIdentity *peer )
276 struct Session * cur;
277 GNUNET_HashCode hc_peer;
278 GNUNET_HashCode hc_current;
280 cur = plugin->sessions;
281 hc_peer = peer->hashPubKey;
284 hc_current = cur->sender.hashPubKey;
285 if ( 0 == GNUNET_CRYPTO_hash_cmp( &hc_peer, &hc_current))
287 cur = plugin->sessions->next;
293 * Create a new session
295 * @param address address the peer is using
296 * @peer peer identity
297 * @return created session object
300 static struct Session * create_session (struct sockaddr_in *address, const struct GNUNET_PeerIdentity *peer)
302 struct sockaddr_in *addrin;
303 struct sockaddr_in6 *addrin6;
305 struct Session * ses = GNUNET_malloc ( sizeof( struct Session) );
306 ses->addr = GNUNET_malloc ( sizeof (struct sockaddr_in) );
309 ses->plugin = plugin;
311 memcpy(ses->addr, address, sizeof (struct sockaddr_in));
312 if ( AF_INET == address->sin_family)
314 ses->ip = GNUNET_malloc (INET_ADDRSTRLEN);
316 inet_ntop(addrin->sin_family,&(addrin->sin_addr),ses->ip,INET_ADDRSTRLEN);
318 if ( AF_INET6 == address->sin_family)
320 ses->ip = GNUNET_malloc (INET6_ADDRSTRLEN);
321 addrin6 = (struct sockaddr_in6 *) address;
322 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr) ,ses->ip,INET6_ADDRSTRLEN);
324 memcpy(&ses->sender, peer, sizeof (struct GNUNET_PeerIdentity));
325 GNUNET_CRYPTO_hash_to_enc(&ses->sender.hashPubKey,&(ses->hash));
326 ses->is_active = GNUNET_NO;
332 * Callback called by MHD when a connection is terminated
334 static void requestCompletedCallback (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
338 cs = *httpSessionCache;
341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection from peer `%s' was terminated\n",GNUNET_i2s(&cs->sender));
342 /* session set to inactive */
343 cs->is_active = GNUNET_NO;
344 cs->is_put_in_progress = GNUNET_NO;
350 * Check if we are allowed to connect to the given IP.
353 acceptPolicyCallback (void *cls,
354 const struct sockaddr *addr, socklen_t addr_len)
356 /* Every connection is accepted, nothing more to do here */
357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connect!\n");
364 * Process GET or PUT request received via MHD. For
365 * GET, queue response that will send back our pending
366 * messages. For PUT, process incoming data and send
367 * to GNUnet core. In either case, check if a session
368 * already exists and create a new one if not.
371 accessHandlerCallback (void *cls,
372 struct MHD_Connection *session,
376 const char *upload_data,
377 size_t * upload_data_size, void **httpSessionCache)
379 struct MHD_Response *response;
381 struct Session * cs_temp;
382 const union MHD_ConnectionInfo * conn_info;
383 struct sockaddr_in *addrin;
384 struct sockaddr_in6 *addrin6;
385 char * address = NULL;
386 struct GNUNET_PeerIdentity pi_in;
389 struct GNUNET_MessageHeader *gn_msg;
390 int send_error_to_client;
393 send_error_to_client = GNUNET_NO;
394 if ( NULL == *httpSessionCache)
396 /* check url for peer identity */
397 res = GNUNET_CRYPTO_hash_from_string ( &url[1], &(pi_in.hashPubKey));
398 if ( GNUNET_SYSERR == res )
400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident\n");
401 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
402 res = MHD_queue_response (session, MHD_HTTP_NOT_FOUND, response);
403 MHD_destroy_response (response);
407 conn_info = MHD_get_connection_info(session, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
408 /* Incoming IPv4 connection */
409 if ( AF_INET == conn_info->client_addr->sin_family)
411 address = GNUNET_malloc (INET_ADDRSTRLEN);
412 addrin = conn_info->client_addr;
413 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
415 /* Incoming IPv6 connection */
416 if ( AF_INET6 == conn_info->client_addr->sin_family)
418 address = GNUNET_malloc (INET6_ADDRSTRLEN);
419 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
420 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
422 /* find existing session for address */
424 if (plugin->session_count > 0)
426 cs = plugin->sessions;
430 /* Comparison based on ip address */
431 // res = (0 == memcmp(&(conn_info->client_addr->sin_addr),&(cs->addr->sin_addr), sizeof (struct in_addr))) ? GNUNET_YES : GNUNET_NO;
433 /* Comparison based on ip address, port number and address family */
434 // res = (0 == memcmp((conn_info->client_addr),(cs->addr), sizeof (struct sockaddr_in))) ? GNUNET_YES : GNUNET_NO;
436 /* Comparison based on PeerIdentity */
437 res = (0 == memcmp(&pi_in,&(cs->sender), sizeof (struct GNUNET_PeerIdentity))) ? GNUNET_YES : GNUNET_NO;
439 if ( GNUNET_YES == res)
441 /* existing session for this address found */
442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session `%s' found\n",address);
448 /* no existing session, create a new one*/
451 /* create new session object */
452 cs = create_session(conn_info->client_addr, &pi_in);
454 /* Insert session into linked list */
455 if ( plugin->sessions == NULL)
457 plugin->sessions = cs;
458 plugin->session_count = 1;
460 cs_temp = plugin->sessions;
461 while ( cs_temp->next != NULL )
463 cs_temp = cs_temp->next;
468 plugin->session_count++;
470 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"New Session `%s' inserted, count %u \n", address, plugin->session_count);
473 if (*httpSessionCache == NULL)
475 *httpSessionCache = cs;
477 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);
481 cs = *httpSessionCache;
483 /* Is it a PUT or a GET request */
484 if ( 0 == strcmp (MHD_HTTP_METHOD_PUT, method) )
487 if ((*upload_data_size == 0) && (cs->is_put_in_progress == GNUNET_NO))
490 cs->is_put_in_progress = GNUNET_YES;
491 cs->is_active = GNUNET_YES;
494 if ( *upload_data_size > 0 )
496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"PUT URL: `%s'\n",url);
497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"PUT Request: %lu bytes: `%s' \n", (*upload_data_size), upload_data);
499 bytes_recv = *upload_data_size ;
500 *upload_data_size = 0;
503 if (bytes_recv < sizeof (struct GNUNET_MessageHeader))
505 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));
506 send_error_to_client = GNUNET_YES;
509 if ( bytes_recv > GNUNET_SERVER_MAX_MESSAGE_SIZE)
511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Message too big, is %u bytes, maximum %u '\n",bytes_recv, GNUNET_SERVER_MAX_MESSAGE_SIZE);
512 send_error_to_client = GNUNET_YES;
515 struct GNUNET_MessageHeader * gn_msg = GNUNET_malloc (bytes_recv);
516 memcpy (gn_msg,upload_data,bytes_recv);
518 if ( ntohs(gn_msg->size) != bytes_recv )
520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Message has incorrect size, is %u bytes vs %u recieved'\n",ntohs(gn_msg->size) , bytes_recv);
521 send_error_to_client = GNUNET_YES;
524 if ( GNUNET_YES == send_error_to_client)
526 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
527 res = MHD_queue_response (session, MHD_HTTP_BAD_REQUEST, response);
528 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 );
529 MHD_destroy_response (response);
530 GNUNET_free (gn_msg);
533 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));
535 /* forwarding message to transport */
536 plugin->env->receive(plugin->env, &(cs->sender), gn_msg, 1, cs , cs->ip, strlen(cs->ip) );
539 if ((*upload_data_size == 0) && (cs->is_put_in_progress == GNUNET_YES))
541 cs->is_put_in_progress = GNUNET_NO;
542 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
543 res = MHD_queue_response (session, MHD_HTTP_OK, response);
544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Sent HTTP/1.1: 200 OK as PUT Response\n",HTTP_PUT_RESPONSE, strlen (HTTP_PUT_RESPONSE), res );
545 MHD_destroy_response (response);
549 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Got GET Request\n");
552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"URL: `%s'\n",url);
553 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
554 res = MHD_queue_response (session, MHD_HTTP_OK, response);
555 MHD_destroy_response (response);
563 * Call MHD to process pending requests and then go back
564 * and schedule the next run.
566 static void http_daemon_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
569 * Function that queries MHD's select sets and
570 * starts the task waiting for them.
572 static GNUNET_SCHEDULER_TaskIdentifier
573 http_daemon_prepare (struct MHD_Daemon *daemon_handle)
575 GNUNET_SCHEDULER_TaskIdentifier ret;
579 struct GNUNET_NETWORK_FDSet *wrs;
580 struct GNUNET_NETWORK_FDSet *wws;
581 struct GNUNET_NETWORK_FDSet *wes;
583 unsigned long long timeout;
585 struct GNUNET_TIME_Relative tv;
590 wrs = GNUNET_NETWORK_fdset_create ();
591 wes = GNUNET_NETWORK_fdset_create ();
592 wws = GNUNET_NETWORK_fdset_create ();
594 GNUNET_assert (MHD_YES ==
595 MHD_get_fdset (daemon_handle,
600 haveto = MHD_get_timeout (daemon_handle, &timeout);
601 if (haveto == MHD_YES)
602 tv.value = (uint64_t) timeout;
604 tv = GNUNET_TIME_UNIT_FOREVER_REL;
605 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
606 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
607 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
608 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
609 GNUNET_SCHEDULER_PRIORITY_HIGH,
610 GNUNET_SCHEDULER_NO_TASK,
616 GNUNET_NETWORK_fdset_destroy (wrs);
617 GNUNET_NETWORK_fdset_destroy (wws);
618 GNUNET_NETWORK_fdset_destroy (wes);
623 * Call MHD to process pending requests and then go back
624 * and schedule the next run.
627 http_daemon_run (void *cls,
628 const struct GNUNET_SCHEDULER_TaskContext *tc)
630 struct MHD_Daemon *daemon_handle = cls;
632 if (daemon_handle == http_daemon_v4)
633 http_task_v4 = GNUNET_SCHEDULER_NO_TASK;
635 if (daemon_handle == http_daemon_v6)
636 http_task_v6 = GNUNET_SCHEDULER_NO_TASK;
638 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
643 GNUNET_assert (MHD_YES == MHD_run (daemon_handle));
644 if (daemon_handle == http_daemon_v4)
645 http_task_v4 = http_daemon_prepare (daemon_handle);
646 if (daemon_handle == http_daemon_v6)
647 http_task_v6 = http_daemon_prepare (daemon_handle);
652 * Removes a message from the linked list of messages
655 static int remove_http_message(struct Session * ses, struct HTTP_Message * msg)
657 struct HTTP_Message * cur;
658 struct HTTP_Message * next;
660 cur = ses->pending_outbound_msg;
664 return GNUNET_SYSERR;
668 ses->pending_outbound_msg = cur->next;
669 GNUNET_free (cur->buf);
675 while (cur->next!=msg)
677 if (cur->next != NULL)
680 return GNUNET_SYSERR;
683 cur->next = cur->next->next;
684 GNUNET_free (cur->next->buf);
685 GNUNET_free (cur->next);
691 static size_t send_read_callback(void *stream, size_t size, size_t nmemb, void *ptr)
693 struct Session * ses = ptr;
694 struct HTTP_Message * msg = ses->pending_outbound_msg;
695 unsigned int bytes_sent;
698 if (msg->len > (size * nmemb))
699 return CURL_READFUNC_ABORT;
701 if (( msg->pos < msg->len) && (msg->len < (size * nmemb)))
703 memcpy(stream, msg->buf, msg->len);
705 bytes_sent = msg->len;
712 static size_t send_write_callback( void *ptr, size_t size, size_t nmemb, void *stream)
714 char * data = malloc(size*nmemb +1);
716 memcpy( data, ptr, size*nmemb);
717 data[size*nmemb] = '\0';
718 /* Just a dummy print for the response recieved for the PUT message */
719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Recieved %u bytes: `%s' \n", size * nmemb, data);
721 return (size * nmemb);
725 static size_t send_prepare(struct Session* session );
727 static ssize_t send_select_init (struct Session* ses )
732 struct HTTP_Message * msg;
734 /* FIFO selection, send oldest msg first, perhaps priority here? */
735 msg = ses->pending_outbound_msg;
737 url = GNUNET_malloc( 7 + strlen(ses->ip) + 7 + strlen ((char *) &(ses->hash)) + 1);
738 /* FIXME: use correct port number */
739 GNUNET_asprintf(&url,"http://%s:%u/%s",ses->ip,12389, (char *) &(ses->hash));
741 /* curl_easy_setopt(ses->curl_handle, CURLOPT_VERBOSE, 1L); */
742 curl_easy_setopt(ses->curl_handle, CURLOPT_URL, url);
743 curl_easy_setopt(ses->curl_handle, CURLOPT_PUT, 1L);
744 curl_easy_setopt(ses->curl_handle, CURLOPT_READFUNCTION, send_read_callback);
745 curl_easy_setopt(ses->curl_handle, CURLOPT_READDATA, ses);
746 curl_easy_setopt(ses->curl_handle, CURLOPT_WRITEFUNCTION, send_write_callback);
747 curl_easy_setopt(ses->curl_handle, CURLOPT_READDATA, ses);
748 curl_easy_setopt(ses->curl_handle, CURLOPT_INFILESIZE_LARGE, (curl_off_t) msg->len);
749 curl_easy_setopt(ses->curl_handle, CURLOPT_TIMEOUT, (timeout.value / 1000 ));
750 curl_easy_setopt(ses->curl_handle, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
752 mret = curl_multi_add_handle(multi_handle, ses->curl_handle);
753 if (mret != CURLM_OK)
755 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
756 _("%s failed at %s:%d: `%s'\n"),
757 "curl_multi_add_handle", __FILE__, __LINE__,
758 curl_multi_strerror (mret));
761 bytes_sent = send_prepare (ses );
766 static void send_execute (void *cls,
767 const struct GNUNET_SCHEDULER_TaskContext *tc)
772 struct Session * cs = cls;
774 http_task_send = GNUNET_SCHEDULER_NO_TASK;
775 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
781 mret = curl_multi_perform (multi_handle, &running);
782 //GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"send_execute %u\n", running);
788 msg = curl_multi_info_read (multi_handle, &running);
789 GNUNET_break (msg != NULL);
795 if ( (msg->data.result != CURLE_OK) &&
796 (msg->data.result != CURLE_GOT_NOTHING) )
797 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
798 _("%s failed for `%s' at %s:%d: `%s'\n"),
799 "curl_multi_perform",
803 curl_easy_strerror (msg->data.result));
806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
807 "Send to %s completed.\n", cs->ip);
808 if (GNUNET_OK != remove_http_message(cs, cs->pending_outbound_msg))
809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Message could not be removed from session `%s'", GNUNET_i2s(&cs->sender));
811 curl_easy_cleanup(cs->curl_handle);
812 cs->curl_handle=NULL;
814 if (cs->pending_outbound_msg != NULL)
815 send_select_init (cs);
817 /* Calling transmit continuation */
818 if ( NULL != cs->transmit_cont)
819 cs->transmit_cont (NULL,&cs->sender,GNUNET_OK);
827 while ( (running > 0) );
830 while (mret == CURLM_CALL_MULTI_PERFORM);
835 static size_t send_prepare(struct Session* session )
841 struct GNUNET_NETWORK_FDSet *grs;
842 struct GNUNET_NETWORK_FDSet *gws;
846 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"send_prepare\n");
851 mret = curl_multi_fdset (multi_handle, &rs, &ws, &es, &max);
852 if (mret != CURLM_OK)
854 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
855 _("%s failed at %s:%d: `%s'\n"),
856 "curl_multi_fdset", __FILE__, __LINE__,
857 curl_multi_strerror (mret));
860 mret = curl_multi_timeout (multi_handle, &to);
861 if (mret != CURLM_OK)
863 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
864 _("%s failed at %s:%d: `%s'\n"),
865 "curl_multi_timeout", __FILE__, __LINE__,
866 curl_multi_strerror (mret));
870 grs = GNUNET_NETWORK_fdset_create ();
871 gws = GNUNET_NETWORK_fdset_create ();
872 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
873 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
874 http_task_send = GNUNET_SCHEDULER_add_select (plugin->env->sched,
875 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
876 GNUNET_SCHEDULER_NO_TASK,
877 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
882 GNUNET_NETWORK_fdset_destroy (gws);
883 GNUNET_NETWORK_fdset_destroy (grs);
885 /* FIXME: return bytes REALLY sent */
890 * Function that can be used by the transport service to transmit
891 * a message using the plugin.
894 * @param target who should receive this message
895 * @param priority how important is the message
896 * @param msgbuf the message to transmit
897 * @param msgbuf_size number of bytes in 'msgbuf'
898 * @param timeout when should we time out
899 * @param session which session must be used (or NULL for "any")
900 * @param addr the address to use (can be NULL if the plugin
901 * is "on its own" (i.e. re-use existing TCP connection))
902 * @param addrlen length of the address in bytes
903 * @param force_address GNUNET_YES if the plugin MUST use the given address,
904 * otherwise the plugin may use other addresses or
905 * existing connections (if available)
906 * @param cont continuation to call once the message has
907 * been transmitted (or if the transport is ready
908 * for the next transmission call; or if the
909 * peer disconnected...)
910 * @param cont_cls closure for cont
911 * @return number of bytes used (on the physical network, with overheads);
912 * -1 on hard errors (i.e. address invalid); 0 is a legal value
913 * and does NOT mean that the message was not transmitted (DV)
916 http_plugin_send (void *cls,
917 const struct GNUNET_PeerIdentity *target,
920 unsigned int priority,
921 struct GNUNET_TIME_Relative to,
922 struct Session *session,
926 GNUNET_TRANSPORT_TransmitContinuation cont,
930 struct Session* ses_temp;
931 struct HTTP_Message * msg;
932 struct HTTP_Message * tmp;
935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport told plugin to send to peer `%s'\n",GNUNET_i2s(target));
937 /* find session for peer */
938 ses = find_session_by_pi (target);
940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Existing session for peer `%s' found\n", GNUNET_i2s(target));
943 /* create new session object */
945 /*FIXME: what is const void * really? Assuming struct sockaddr_in * ! */
946 ses = create_session((struct sockaddr_in *) addr, target);
947 ses->is_active = GNUNET_YES;
948 ses->transmit_cont = cont;
950 /* Insert session into linked list */
951 if ( plugin->sessions == NULL)
953 plugin->sessions = ses;
954 plugin->session_count = 1;
956 ses_temp = plugin->sessions;
957 while ( ses_temp->next != NULL )
959 ses_temp = ses_temp->next;
961 if (ses_temp != ses )
963 ses_temp->next = ses;
964 plugin->session_count++;
966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"New Session `%s' inserted, count %u \n", GNUNET_i2s(target), plugin->session_count);
969 ses->curl_handle = curl_easy_init();
970 if( NULL == ses->curl_handle)
972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Getting cURL handle failed\n");
977 ses->transmit_cont = cont;
979 /* setting up message */
980 msg = GNUNET_malloc (sizeof (struct HTTP_Message));
982 msg->len = msgbuf_size;
984 msg->buf = GNUNET_malloc (msgbuf_size);
985 memcpy (msg->buf,msgbuf, msgbuf_size);
987 /* insert created message in list of pending messages */
989 if (ses->pending_outbound_msg == NULL)
991 ses->pending_outbound_msg = msg;
993 tmp = ses->pending_outbound_msg;
994 while ( NULL != tmp->next)
1001 bytes_sent = send_select_init (ses);
1009 * Function that can be used to force the plugin to disconnect
1010 * from the given peer and cancel all previous transmissions
1011 * (and their continuationc).
1013 * @param cls closure
1014 * @param target peer from which to disconnect
1017 http_plugin_disconnect (void *cls,
1018 const struct GNUNET_PeerIdentity *target)
1020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_disconnect\n");
1021 // struct Plugin *plugin = cls;
1027 * Convert the transports address to a nice, human-readable
1030 * @param cls closure
1031 * @param type name of the transport that generated the address
1032 * @param addr one of the addresses of the host, NULL for the last address
1033 * the specific address format depends on the transport
1034 * @param addrlen length of the address
1035 * @param numeric should (IP) addresses be displayed in numeric form?
1036 * @param timeout after how long should we give up?
1037 * @param asc function to call on each string
1038 * @param asc_cls closure for asc
1041 http_plugin_address_pretty_printer (void *cls,
1046 struct GNUNET_TIME_Relative timeout,
1047 GNUNET_TRANSPORT_AddressStringCallback
1050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_pretty_printer\n");
1051 asc (asc_cls, NULL);
1057 * Another peer has suggested an address for this
1058 * peer and transport plugin. Check that this could be a valid
1059 * address. If so, consider adding it to the list
1062 * @param cls closure
1063 * @param addr pointer to the address
1064 * @param addrlen length of addr
1065 * @return GNUNET_OK if this is a plausible address for this peer
1069 http_plugin_address_suggested (void *cls,
1070 void *addr, size_t addrlen)
1072 /* struct Plugin *plugin = cls; */
1074 /* check if the address is plausible; if so,
1075 add it to our list! */
1076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_suggested\n");
1082 * Function called for a quick conversion of the binary address to
1083 * a numeric address. Note that the caller must not free the
1084 * address and that the next call to this function is allowed
1085 * to override the address again.
1087 * @param cls closure
1088 * @param addr binary address
1089 * @param addrlen length of the address
1090 * @return string representing the same address
1093 http_plugin_address_to_string (void *cls,
1097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Plugin: http_plugin_address_to_string\n");
1103 * Exit point from the plugin.
1106 libgnunet_plugin_transport_http_done (void *cls)
1108 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1109 struct Plugin *plugin = api->cls;
1110 struct Session * cs;
1111 struct Session * cs_next;
1114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unloading http plugin...\n");
1116 if ( http_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1118 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_v4);
1119 http_task_v4 = GNUNET_SCHEDULER_NO_TASK;
1122 if ( http_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1124 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_v6);
1125 http_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1128 if ( http_task_send != GNUNET_SCHEDULER_NO_TASK)
1130 GNUNET_SCHEDULER_cancel(plugin->env->sched, http_task_send);
1131 http_task_send = GNUNET_SCHEDULER_NO_TASK;
1134 if (http_daemon_v4 != NULL)
1136 MHD_stop_daemon (http_daemon_v4);
1137 http_daemon_v4 = NULL;
1139 if (http_daemon_v6 != NULL)
1141 MHD_stop_daemon (http_daemon_v6);
1142 http_daemon_v6 = NULL;
1145 mret = curl_multi_cleanup(multi_handle);
1146 if ( CURLM_OK != mret)
1147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed");
1149 /* free all sessions */
1150 cs = plugin->sessions;
1154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing session to `%s'\n",cs->ip);
1157 /* freeing messages */
1158 struct HTTP_Message *cur;
1159 struct HTTP_Message *tmp;
1160 cur = cs->pending_outbound_msg;
1165 if (NULL != cur->buf)
1166 GNUNET_free (cur->buf);
1171 GNUNET_free (cs->ip);
1172 GNUNET_free (cs->addr);
1174 plugin->session_count--;
1179 /* GNUNET_SERVICE_stop (plugin->service); */
1180 GNUNET_free (hostname);
1181 GNUNET_free (plugin);
1188 * Entry point for the plugin.
1191 libgnunet_plugin_transport_http_init (void *cls)
1193 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1194 struct GNUNET_TRANSPORT_PluginFunctions *api;
1195 struct GNUNET_SERVICE_Context *service;
1196 unsigned int timeout;
1197 struct GNUNET_TIME_Relative gn_timeout;
1198 long long unsigned int port;
1200 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
1204 service = GNUNET_SERVICE_start ("transport-http", env->sched, env->cfg);
1205 if (service == NULL)
1207 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, "", _
1208 ("Failed to start service for `%s' transport plugin.\n"),
1214 plugin = GNUNET_malloc (sizeof (struct Plugin));
1216 plugin->sessions = NULL;
1217 plugin->service = service;
1218 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1220 api->send = &http_plugin_send;
1221 api->disconnect = &http_plugin_disconnect;
1222 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1223 api->check_address = &http_plugin_address_suggested;
1224 api->address_to_string = &http_plugin_address_to_string;
1226 hostname = GNUNET_RESOLVER_local_fqdn_get ();
1228 /* Hashing our identity to use it in URLs */
1229 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &my_ascii_hash_ident);
1231 /* Reading port number from config file */
1233 GNUNET_CONFIGURATION_get_value_number (env->cfg,
1239 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1242 ("Require valid port number for transport plugin `%s' in configuration!\n"),
1244 libgnunet_plugin_transport_http_done (api);
1248 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1249 timeout = ( gn_timeout.value / 1000);
1250 if ((http_daemon_v4 == NULL) && (http_daemon_v6 == NULL) && (port != 0))
1252 http_daemon_v6 = MHD_start_daemon (MHD_USE_IPv6,
1254 &acceptPolicyCallback,
1255 NULL , &accessHandlerCallback, NULL,
1256 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1257 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1258 MHD_OPTION_CONNECTION_TIMEOUT, timeout,
1259 /* FIXME: set correct limit */
1260 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1261 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1263 http_daemon_v4 = MHD_start_daemon (MHD_NO_FLAG,
1265 &acceptPolicyCallback,
1266 NULL , &accessHandlerCallback, NULL,
1267 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1268 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1269 MHD_OPTION_CONNECTION_TIMEOUT, timeout,
1270 /* FIXME: set correct limit */
1271 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1272 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1275 if (http_daemon_v4 != NULL)
1276 http_task_v4 = http_daemon_prepare (http_daemon_v4);
1277 if (http_daemon_v6 != NULL)
1278 http_task_v6 = http_daemon_prepare (http_daemon_v6);
1280 if (http_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1281 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
1282 if (http_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1283 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
1285 /* Initializing cURL */
1286 multi_handle = curl_multi_init();
1287 if ( NULL == multi_handle )
1289 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1291 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
1293 libgnunet_plugin_transport_http_done (api);
1299 /* end of plugin_transport_template.c */