2 This file is part of GNUnet
3 (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_http.c
23 * @brief http transport service plugin
24 * @author Matthias Wachs
28 #include "gnunet_constants.h"
29 #include "gnunet_protocols.h"
30 #include "gnunet_connection_lib.h"
31 #include "gnunet_service_lib.h"
32 #include "gnunet_statistics_service.h"
33 #include "gnunet_transport_service.h"
34 #include "gnunet_resolver_service.h"
35 #include "gnunet_server_lib.h"
36 #include "gnunet_container_lib.h"
37 #include "plugin_transport.h"
38 #include "gnunet_os_lib.h"
39 #include "microhttpd.h"
40 #include <curl/curl.h>
42 #define DEBUG_CURL GNUNET_NO
43 #define DEBUG_HTTP GNUNET_NO
44 #define DEBUG_CONNECTIONS GNUNET_NO
46 #define INBOUND GNUNET_NO
47 #define OUTBOUND GNUNET_YES
50 * Text of the response sent back after the last bytes of a PUT
51 * request have been received (just to formally obey the HTTP
54 #define HTTP_PUT_RESPONSE "Thank you!"
57 * After how long do we expire an address that we
58 * learned from another peer if it is not reconfirmed
61 #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
64 * Page returned if request invalid
66 #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>"
69 * Timeout for a http connect
71 #define HTTP_CONNECT_TIMEOUT 30
75 * Network format for IPv4 addresses.
77 struct IPv4HttpAddress
80 * IPv4 address, in network byte order.
82 uint32_t ipv4_addr GNUNET_PACKED;
85 * Port number, in network byte order.
87 uint16_t u_port GNUNET_PACKED;
93 * Network format for IPv6 addresses.
95 struct IPv6HttpAddress
100 struct in6_addr ipv6_addr GNUNET_PACKED;
103 * Port number, in network byte order.
105 uint16_t u6_port GNUNET_PACKED;
111 * Message to send using http
116 * next pointer for double linked list
118 struct HTTP_Message * next;
121 * previous pointer for double linked list
123 struct HTTP_Message * prev;
126 * buffer containing data to send
131 * amount of data already sent
141 * Continuation function to call once the transmission buffer
142 * has again space available. NULL if there is no
143 * continuation to call.
145 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
148 * Closure for transmit_cont.
150 void *transmit_cont_cls;
154 struct HTTP_PeerContext
159 struct GNUNET_PeerIdentity identity;
162 * Pointer to the global plugin struct.
164 struct Plugin *plugin;
167 * Linked list of connections with this peer
170 struct Session * head;
173 * Linked list of connections with this peer
176 struct Session * tail;
179 * id for next session
181 size_t session_id_counter;
190 struct SessionHeader header;
193 * next session in linked list
195 struct Session * next;
198 * previous session in linked list
200 struct Session * prev;
203 * address of this session
218 * Message queue for outbound messages
221 struct HTTP_Message * pending_msgs_head;
224 * Message queue for outbound messages
227 struct HTTP_Message * pending_msgs_tail;
230 * partner peer this connection belongs to
232 struct HTTP_PeerContext * peercontext;
235 * message stream tokenizer for incoming data
237 struct GNUNET_SERVER_MessageStreamTokenizer *msgtok;
241 * outbound: OUTBOUND (GNUNET_YES)
242 * inbound : INBOUND (GNUNET_NO)
244 unsigned int direction;
247 * is session connected to send data?
249 unsigned int send_connected;
252 * is send connection active?
254 unsigned int send_active;
257 * connection disconnect forced (e.g. from transport)
259 unsigned int send_force_disconnect;
262 * is session connected to receive data?
264 unsigned int recv_connected;
267 * is receive connection active?
269 unsigned int recv_active;
272 * connection disconnect forced (e.g. from transport)
274 unsigned int recv_force_disconnect;
277 * id for next session
278 * NOTE: 0 is not an ID, zero is not defined. A correct ID is always > 0
283 * entity managing sending data
284 * outbound session: CURL *
285 * inbound session: mhd_connection *
287 void * send_endpoint;
290 * entity managing recieving data
291 * outbound session: CURL *
292 * inbound session: mhd_connection *
294 void * recv_endpoint;
298 * Encapsulation of all of the state of the plugin.
305 struct GNUNET_TRANSPORT_PluginEnvironment *env;
308 * Handle for reporting statistics.
310 struct GNUNET_STATISTICS_Handle *stats;
312 unsigned int port_inbound;
314 struct GNUNET_CONTAINER_MultiHashMap *peers;
317 * Daemon for listening for new IPv4 connections.
319 struct MHD_Daemon *http_server_daemon_v4;
322 * Daemon for listening for new IPv6connections.
324 struct MHD_Daemon *http_server_daemon_v6;
327 * Our primary task for http daemon handling IPv4 connections
329 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v4;
332 * Our primary task for http daemon handling IPv6 connections
334 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v6;
337 * The task sending data
339 GNUNET_SCHEDULER_TaskIdentifier http_curl_task;
344 CURLM * multi_handle;
347 * Our ASCII encoded, hashed peer identity
348 * This string is used to distinguish between connections and is added to the urls
350 struct GNUNET_CRYPTO_HashAsciiEncoded my_ascii_hash_ident;
355 * Function called for a quick conversion of the binary address to
356 * a numeric address. Note that the caller must not free the
357 * address and that the next call to this function is allowed
358 * to override the address again.
361 * @param addr binary address
362 * @param addrlen length of the address
363 * @return string representing the same address
366 http_plugin_address_to_string (void *cls,
370 static char * create_url(void * cls, const void * addr, size_t addrlen, size_t id)
372 struct Plugin *plugin = cls;
375 GNUNET_assert ((addr!=NULL) && (addrlen != 0));
376 GNUNET_asprintf(&url,
378 http_plugin_address_to_string(NULL, addr, addrlen),
379 (char *) (&plugin->my_ascii_hash_ident),id);
385 * Removes a message from the linked list of messages
386 * @param con connection to remove message from
387 * @param msg message to remove
388 * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
390 static int remove_http_message (struct Session * ps, struct HTTP_Message * msg)
392 GNUNET_CONTAINER_DLL_remove(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
398 * Removes a session from the linked list of sessions
399 * @param pc peer context
401 * @param call_msg_cont GNUNET_YES to call pending message continuations, otherwise no
402 * @param call_msg_cont_result, result to call message continuations with
403 * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
405 static int remove_session (struct HTTP_PeerContext * pc, struct Session * ps, int call_msg_cont, int call_msg_cont_result)
407 struct HTTP_Message * msg;
408 struct Plugin * plugin = ps->peercontext->plugin;
410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: removing %s session %X with id %u\n", ps, (ps->direction == INBOUND) ? "inbound" : "outbound", ps, ps->session_id);
411 plugin->env->session_end(plugin, &pc->identity, ps);
413 GNUNET_free_non_null (ps->addr);
414 GNUNET_SERVER_mst_destroy (ps->msgtok);
415 GNUNET_free(ps->url);
417 msg = ps->pending_msgs_head;
420 if ((call_msg_cont == GNUNET_YES) && (msg->transmit_cont!=NULL))
422 msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,call_msg_cont_result);
425 GNUNET_CONTAINER_DLL_remove(ps->pending_msgs_head,ps->pending_msgs_head,msg);
426 msg = ps->pending_msgs_head;
429 GNUNET_CONTAINER_DLL_remove(pc->head,pc->tail,ps);
435 static struct Session * get_Session (void * cls, struct HTTP_PeerContext *pc, const void * addr, size_t addr_len)
437 struct Session * cc = pc->head;
438 struct Session * con = NULL;
439 unsigned int count = 0;
441 GNUNET_assert((addr_len == sizeof (struct IPv4HttpAddress)) || (addr_len == sizeof (struct IPv6HttpAddress)));
444 if (addr_len == cc->addrlen)
446 if (0 == memcmp(cc->addr, addr, addr_len))
448 /* connection can not be used, since it is disconnected */
449 if ((cc->recv_force_disconnect==GNUNET_NO) && (cc->send_force_disconnect==GNUNET_NO))
462 * Callback called by MHD when a connection is terminated
464 static void mhd_termination_cb (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
466 struct Session * ps = *httpSessionCache;
469 struct HTTP_PeerContext * pc = ps->peercontext;
471 if (connection==ps->recv_endpoint)
473 #if DEBUG_CONNECTIONS
474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
476 ps->recv_active = GNUNET_NO;
477 ps->recv_connected = GNUNET_NO;
478 ps->recv_endpoint = NULL;
480 if (connection==ps->send_endpoint)
483 ps->send_active = GNUNET_NO;
484 ps->send_connected = GNUNET_NO;
485 ps->send_endpoint = NULL;
486 #if DEBUG_CONNECTIONS
487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
491 /* if both connections disconnected, remove session */
492 if ((ps->send_connected == GNUNET_NO) && (ps->recv_connected == GNUNET_NO))
494 remove_session(pc,ps,GNUNET_YES,GNUNET_SYSERR);
498 static void mhd_write_mst_cb (void *cls,
500 const struct GNUNET_MessageHeader *message)
503 struct Session *ps = cls;
504 struct HTTP_PeerContext *pc = ps->peercontext;
505 GNUNET_assert(ps != NULL);
506 GNUNET_assert(pc != NULL);
508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
509 "Connection %X: Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
511 ntohs(message->type),
512 ntohs(message->size),
513 GNUNET_i2s(&(ps->peercontext)->identity),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
515 pc->plugin->env->receive (ps->peercontext->plugin->env->cls,
522 static void curl_receive_mst_cb (void *cls,
524 const struct GNUNET_MessageHeader *message)
526 struct Session *ps = cls;
527 struct HTTP_PeerContext *pc = ps->peercontext;
528 GNUNET_assert(ps != NULL);
529 GNUNET_assert(pc != NULL);
531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
532 "Connection %X: Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
534 ntohs(message->type),
535 ntohs(message->size),
536 GNUNET_i2s(&(pc->identity)),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
538 pc->plugin->env->receive (pc->plugin->env->cls,
547 * Check if ip is allowed to connect.
550 mhd_accept_cb (void *cls,
551 const struct sockaddr *addr, socklen_t addr_len)
554 struct Plugin *plugin = cls;
556 /* Every connection is accepted, nothing more to do here */
560 int mhd_send_callback (void *cls, uint64_t pos, char *buf, int max)
564 struct Session * ps = cls;
565 struct HTTP_PeerContext * pc;
566 struct HTTP_Message * msg;
568 GNUNET_assert (ps!=NULL);
569 pc = ps->peercontext;
570 msg = ps->pending_msgs_tail;
571 if (ps->send_force_disconnect==GNUNET_YES)
573 #if DEBUG_CONNECTIONS
574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound forced to disconnect\n",ps);
581 if ((msg->size-msg->pos) <= max)
583 memcpy(buf,&msg->buf[msg->pos],(msg->size-msg->pos));
584 bytes_read = msg->size-msg->pos;
585 msg->pos+=(msg->size-msg->pos);
589 memcpy(buf,&msg->buf[msg->pos],max);
594 if (msg->pos==msg->size)
596 if (NULL!=msg->transmit_cont)
597 msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
598 remove_http_message(ps,msg);
605 * Process GET or PUT request received via MHD. For
606 * GET, queue response that will send back our pending
607 * messages. For PUT, process incoming data and send
608 * to GNUnet core. In either case, check if a session
609 * already exists and create a new one if not.
612 mdh_access_cb (void *cls,
613 struct MHD_Connection *mhd_connection,
617 const char *upload_data,
618 size_t * upload_data_size, void **httpSessionCache)
620 struct Plugin *plugin = cls;
621 struct MHD_Response *response;
622 const union MHD_ConnectionInfo * conn_info;
624 struct sockaddr_in *addrin;
625 struct sockaddr_in6 *addrin6;
627 char address[INET6_ADDRSTRLEN+14];
628 struct GNUNET_PeerIdentity pi_in;
631 struct IPv4HttpAddress ipv4addr;
632 struct IPv6HttpAddress ipv6addr;
634 struct HTTP_PeerContext *pc;
635 struct Session *ps = NULL;
636 struct Session *ps_tmp = NULL;
639 int send_error_to_client;
643 GNUNET_assert(cls !=NULL);
644 send_error_to_client = GNUNET_NO;
646 if (NULL == *httpSessionCache)
648 /* check url for peer identity , if invalid send HTTP 404*/
649 size_t len = strlen(&url[1]);
650 char * peer = GNUNET_malloc(104+1);
652 if ((len>104) && (url[104]==';'))
654 char * id = GNUNET_malloc((len-104)+1);
655 strcpy(id,&url[105]);
656 memcpy(peer,&url[1],103);
658 id_num = strtoul ( id, NULL , 10);
661 res = GNUNET_CRYPTO_hash_from_string (peer, &(pi_in.hashPubKey));
663 if ( GNUNET_SYSERR == res )
665 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
666 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
667 MHD_destroy_response (response);
669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, sent HTTP 1.1/404\n");
671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, could not send error\n");
677 ps = *httpSessionCache;
678 pc = ps->peercontext;
681 if (NULL == *httpSessionCache)
683 /* get peer context */
684 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &pi_in.hashPubKey);
688 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
690 pc->session_id_counter=1;
691 memcpy(&pc->identity, &pi_in, sizeof(struct GNUNET_PeerIdentity));
692 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
695 conn_info = MHD_get_connection_info(mhd_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
696 /* Incoming IPv4 connection */
697 if ( AF_INET == conn_info->client_addr->sin_family)
699 addrin = conn_info->client_addr;
700 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
701 memcpy(&ipv4addr.ipv4_addr,&(addrin->sin_addr),sizeof(struct in_addr));
702 ipv4addr.u_port = addrin->sin_port;
704 addr_len = sizeof(struct IPv4HttpAddress);
706 /* Incoming IPv6 connection */
707 if ( AF_INET6 == conn_info->client_addr->sin_family)
709 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
710 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
711 memcpy(&ipv6addr.ipv6_addr,&(addrin6->sin6_addr),sizeof(struct in6_addr));
712 ipv6addr.u6_port = addrin6->sin6_port;
714 addr_len = sizeof(struct IPv6HttpAddress);
718 //ps = get_Session(plugin, pc, addr, addr_len);
720 /* only inbound sessions here */
725 if ((ps_tmp->direction==INBOUND) && (ps_tmp->session_id == id_num) && (id_num!=0))
727 if ((ps_tmp->recv_force_disconnect!=GNUNET_YES) && (ps_tmp->send_force_disconnect!=GNUNET_YES))
736 ps = GNUNET_malloc(sizeof (struct Session));
737 ps->addr = GNUNET_malloc(addr_len);
738 memcpy(ps->addr,addr,addr_len);
739 ps->addrlen = addr_len;
740 ps->direction=INBOUND;
741 ps->pending_msgs_head = NULL;
742 ps->pending_msgs_tail = NULL;
743 ps->send_connected=GNUNET_NO;
744 ps->send_active=GNUNET_NO;
745 ps->recv_connected=GNUNET_NO;
746 ps->recv_active=GNUNET_NO;
748 ps->session_id =id_num;
749 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
750 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
753 *httpSessionCache = ps;
754 if (ps->msgtok==NULL)
755 ps->msgtok = GNUNET_SERVER_mst_create (&mhd_write_mst_cb, ps);
757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: HTTP Daemon has new an incoming `%s' request from peer `%s' (`%s')\n",
760 GNUNET_i2s(&pc->identity),
761 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen));
764 /* Is it a PUT or a GET request */
765 if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
767 if (ps->recv_force_disconnect == GNUNET_YES)
769 #if DEBUG_CONNECTIONS
770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection was forced to disconnect\n",ps);
772 ps->recv_active = GNUNET_NO;
775 if ((*upload_data_size == 0) && (ps->recv_active==GNUNET_NO))
777 ps->recv_endpoint = mhd_connection;
778 ps->recv_connected = GNUNET_YES;
779 ps->recv_active = GNUNET_YES;
780 ps->recv_force_disconnect = GNUNET_NO;
781 #if DEBUG_CONNECTIONS
782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound PUT connection connected\n",ps);
787 /* Transmission of all data complete */
788 if ((*upload_data_size == 0) && (ps->recv_active == GNUNET_YES))
790 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
791 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
792 #if DEBUG_CONNECTIONS
793 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Sent HTTP/1.1: 200 OK as PUT Response\n",ps);
795 MHD_destroy_response (response);
796 ps->recv_active=GNUNET_NO;
801 if ((*upload_data_size > 0) && (ps->recv_active == GNUNET_YES))
803 res = GNUNET_SERVER_mst_receive(ps->msgtok, ps, upload_data,*upload_data_size, GNUNET_NO, GNUNET_NO);
804 (*upload_data_size) = 0;
810 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
812 if (ps->send_force_disconnect == GNUNET_YES)
814 #if DEBUG_CONNECTIONS
815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection was forced to disconnect\n",ps);
817 ps->send_active = GNUNET_NO;
820 ps->send_connected = GNUNET_YES;
821 ps->send_active = GNUNET_YES;
822 ps->send_endpoint = mhd_connection;
823 ps->send_force_disconnect = GNUNET_NO;
824 #if DEBUG_CONNECTIONS
825 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound GET connection connected\n",ps);
827 response = MHD_create_response_from_callback(-1,32 * 1024, &mhd_send_callback, ps, NULL);
828 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
829 MHD_destroy_response (response);
837 * Call MHD to process pending ipv4 requests and then go back
838 * and schedule the next run.
840 static void http_server_daemon_v4_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
842 * Call MHD to process pending ipv6 requests and then go back
843 * and schedule the next run.
845 static void http_server_daemon_v6_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
848 * Function that queries MHD's select sets and
849 * starts the task waiting for them.
851 static GNUNET_SCHEDULER_TaskIdentifier
852 http_server_daemon_prepare (void * cls, struct MHD_Daemon *daemon_handle)
854 struct Plugin *plugin = cls;
855 GNUNET_SCHEDULER_TaskIdentifier ret;
859 struct GNUNET_NETWORK_FDSet *wrs;
860 struct GNUNET_NETWORK_FDSet *wws;
861 struct GNUNET_NETWORK_FDSet *wes;
863 unsigned long long timeout;
865 struct GNUNET_TIME_Relative tv;
867 GNUNET_assert(cls !=NULL);
868 ret = GNUNET_SCHEDULER_NO_TASK;
872 wrs = GNUNET_NETWORK_fdset_create ();
873 wes = GNUNET_NETWORK_fdset_create ();
874 wws = GNUNET_NETWORK_fdset_create ();
876 GNUNET_assert (MHD_YES ==
877 MHD_get_fdset (daemon_handle,
882 haveto = MHD_get_timeout (daemon_handle, &timeout);
883 if (haveto == MHD_YES)
884 tv.value = (uint64_t) timeout;
886 tv = GNUNET_TIME_UNIT_FOREVER_REL;
887 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
888 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
889 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
890 if (daemon_handle == plugin->http_server_daemon_v4)
892 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
894 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
895 plugin->http_server_daemon_v4 = GNUNET_SCHEDULER_NO_TASK;
898 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
899 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
900 GNUNET_SCHEDULER_NO_TASK,
904 &http_server_daemon_v4_run,
907 if (daemon_handle == plugin->http_server_daemon_v6)
909 if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
911 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
912 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
915 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
916 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
917 GNUNET_SCHEDULER_NO_TASK,
921 &http_server_daemon_v6_run,
924 GNUNET_NETWORK_fdset_destroy (wrs);
925 GNUNET_NETWORK_fdset_destroy (wws);
926 GNUNET_NETWORK_fdset_destroy (wes);
931 * Call MHD to process pending requests and then go back
932 * and schedule the next run.
934 static void http_server_daemon_v4_run (void *cls,
935 const struct GNUNET_SCHEDULER_TaskContext *tc)
937 struct Plugin *plugin = cls;
939 GNUNET_assert(cls !=NULL);
940 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
942 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
945 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v4));
946 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
952 * Call MHD to process pending requests and then go back
953 * and schedule the next run.
955 static void http_server_daemon_v6_run (void *cls,
956 const struct GNUNET_SCHEDULER_TaskContext *tc)
958 struct Plugin *plugin = cls;
960 GNUNET_assert(cls !=NULL);
961 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
963 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
966 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v6));
967 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
972 * Function setting up curl handle and selecting message to send
974 * @param ses session to send data to
975 * @param con connection
976 * @return bytes sent to peer
978 static ssize_t send_check_connections (void *cls, struct Session *ps);
980 static size_t curl_get_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
982 struct Session * ps = stream;
985 size_t len = size * nmemb;
986 long http_result = 0;
988 /* Getting last http result code */
989 if (ps->recv_connected==GNUNET_NO)
991 GNUNET_assert(NULL!=ps);
992 res = curl_easy_getinfo(ps->recv_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
995 if (http_result == 200)
997 ps->recv_connected = GNUNET_YES;
998 ps->recv_active = GNUNET_YES;
999 #if DEBUG_CONNECTIONS
1000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to recieve data\n",ps);
1002 // Calling send_check_connections again since receive is established
1003 send_check_connections (ps->peercontext->plugin, ps);
1009 if ((size * nmemb) < SIZE_MAX)
1010 tmp = GNUNET_malloc (len+1);
1012 if ((tmp != NULL) && (len > 0))
1014 memcpy(tmp,ptr,len);
1017 if (tmp[len-2] == 13)
1021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
1027 return size * nmemb;
1030 static size_t curl_put_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
1032 struct Session * ps = stream;
1035 size_t len = size * nmemb;
1036 long http_result = 0;
1039 /* Getting last http result code */
1040 GNUNET_assert(NULL!=ps);
1041 res = curl_easy_getinfo(ps->send_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
1042 if (CURLE_OK == res)
1044 if ((http_result == 100) && (ps->send_connected==GNUNET_NO))
1046 ps->send_connected = GNUNET_YES;
1047 ps->send_active = GNUNET_YES;
1048 #if DEBUG_CONNECTIONS
1049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to send data\n",ps);
1052 if ((http_result == 200) && (ps->send_connected==GNUNET_YES))
1054 ps->send_connected = GNUNET_NO;
1055 ps->send_active = GNUNET_NO;
1056 #if DEBUG_CONNECTIONS
1057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: sending disconnected\n",ps);
1063 if ((size * nmemb) < SIZE_MAX)
1064 tmp = GNUNET_malloc (len+1);
1066 if ((tmp != NULL) && (len > 0))
1068 memcpy(tmp,ptr,len);
1071 if (tmp[len-2] == 13)
1075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
1081 return size * nmemb;
1085 * Callback method used with libcurl
1086 * Method is called when libcurl needs to read data during sending
1087 * @param stream pointer where to write data
1088 * @param size size of an individual element
1089 * @param nmemb count of elements that can be written to the buffer
1090 * @param ptr source pointer, passed to the libcurl handle
1091 * @return bytes written to stream
1093 static size_t curl_send_cb(void *stream, size_t size, size_t nmemb, void *ptr)
1095 struct Session * ps = ptr;
1096 struct HTTP_Message * msg = ps->pending_msgs_tail;
1100 if (ps->send_active == GNUNET_NO)
1101 return CURL_READFUNC_PAUSE;
1104 if ((ps->pending_msgs_tail == NULL) && (ps->send_active == GNUNET_YES))
1106 #if DEBUG_CONNECTIONS
1107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: No Message to send, pausing connection\n",ps);
1109 ps->send_active = GNUNET_NO;
1110 return CURL_READFUNC_PAUSE;
1113 msg = ps->pending_msgs_tail;
1115 if (msg->pos < msg->size)
1117 /* data fit in buffer */
1118 if ((msg->size - msg->pos) <= (size * nmemb))
1120 len = (msg->size - msg->pos);
1121 memcpy(stream, &msg->buf[msg->pos], len);
1128 memcpy(stream, &msg->buf[msg->pos], len);
1133 /* no data to send */
1139 if ( msg->pos == msg->size)
1141 #if DEBUG_CONNECTIONS
1142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Message with %u bytes sent, removing message from queue \n",ps, msg->pos);
1144 /* Calling transmit continuation */
1145 if (( NULL != ps->pending_msgs_tail) && (NULL != ps->pending_msgs_tail->transmit_cont))
1146 msg->transmit_cont (ps->pending_msgs_tail->transmit_cont_cls,&(ps->peercontext)->identity,GNUNET_OK);
1147 remove_http_message(ps, msg);
1153 * Callback method used with libcurl
1154 * Method is called when libcurl needs to write data during sending
1155 * @param stream pointer where to write data
1156 * @param size size of an individual element
1157 * @param nmemb count of elements that can be written to the buffer
1158 * @param ptr destination pointer, passed to the libcurl handle
1159 * @return bytes read from stream
1161 static size_t curl_receive_cb( void *stream, size_t size, size_t nmemb, void *ptr)
1163 struct Session * ps = ptr;
1164 #if DEBUG_CONNECTIONS
1165 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: %u bytes received\n",ps, size*nmemb);
1167 GNUNET_SERVER_mst_receive(ps->msgtok, ps, stream, size*nmemb, GNUNET_NO, GNUNET_NO);
1168 return (size * nmemb);
1173 * Function setting up file descriptors and scheduling task to run
1174 * @param cls closure
1175 * @param ses session to send data to
1178 static int curl_schedule(void *cls );
1183 * Function setting up curl handle and selecting message to send
1185 * @param ses session to send data to
1186 * @param con connection
1187 * @return GNUNET_SYSERR on failure, GNUNET_NO if connecting, GNUNET_YES if ok
1189 static ssize_t send_check_connections (void *cls, struct Session *ps)
1191 struct Plugin *plugin = cls;
1193 struct HTTP_Message * msg;
1195 struct GNUNET_TIME_Relative timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1197 GNUNET_assert(cls !=NULL);
1199 if (ps->direction == OUTBOUND)
1201 /* RECV DIRECTION */
1202 /* Check if session is connected to receive data, otherwise connect to peer */
1203 if (ps->recv_connected == GNUNET_NO)
1205 if (ps->recv_endpoint == NULL)
1207 ps->recv_endpoint = curl_easy_init();
1209 curl_easy_setopt(ps->recv_endpoint, CURLOPT_VERBOSE, 1L);
1211 curl_easy_setopt(ps->recv_endpoint, CURLOPT_URL, ps->url);
1212 curl_easy_setopt(ps->recv_endpoint, CURLOPT_HEADERFUNCTION, &curl_get_header_function);
1213 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEHEADER, ps);
1214 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READFUNCTION, curl_send_cb);
1215 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READDATA, ps);
1216 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEFUNCTION, curl_receive_cb);
1217 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEDATA, ps);
1218 curl_easy_setopt(ps->recv_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1219 curl_easy_setopt(ps->recv_endpoint, CURLOPT_PRIVATE, ps);
1220 curl_easy_setopt(ps->recv_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1221 curl_easy_setopt(ps->recv_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1223 mret = curl_multi_add_handle(plugin->multi_handle, ps->recv_endpoint);
1224 if (mret != CURLM_OK)
1226 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1227 _("Connection: %X: %s failed at %s:%d: `%s'\n"),
1229 "curl_multi_add_handle", __FILE__, __LINE__,
1230 curl_multi_strerror (mret));
1231 return GNUNET_SYSERR;
1233 if (curl_schedule (plugin) == GNUNET_SYSERR)
1234 return GNUNET_SYSERR;
1235 #if DEBUG_CONNECTIONS
1236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound not connected, initiating connection\n",ps);
1241 /* waiting for receive direction */
1242 if (ps->recv_connected==GNUNET_NO)
1245 /* SEND DIRECTION */
1246 /* Check if session is connected to send data, otherwise connect to peer */
1247 if ((ps->send_connected == GNUNET_YES) && (ps->send_endpoint!= NULL))
1249 if (ps->send_active == GNUNET_YES)
1251 #if DEBUG_CONNECTIONS
1252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound active, enqueueing message\n",ps);
1256 if (ps->send_active == GNUNET_NO)
1258 #if DEBUG_CONNECTIONS
1259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound paused, unpausing existing connection and enqueueing message\n",ps);
1261 if (CURLE_OK == curl_easy_pause(ps->send_endpoint,CURLPAUSE_CONT))
1263 ps->send_active=GNUNET_YES;
1267 return GNUNET_SYSERR;
1270 /* not connected, initiate connection */
1271 if ((ps->send_connected==GNUNET_NO) && (NULL == ps->send_endpoint))
1273 ps->send_endpoint = curl_easy_init();
1274 GNUNET_assert (ps->send_endpoint != NULL);
1275 GNUNET_assert (NULL != ps->pending_msgs_tail);
1276 #if DEBUG_CONNECTIONS
1277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound not connected, initiating connection\n",ps);
1279 ps->send_active = GNUNET_NO;
1280 msg = ps->pending_msgs_tail;
1283 curl_easy_setopt(ps->send_endpoint, CURLOPT_VERBOSE, 1L);
1285 curl_easy_setopt(ps->send_endpoint, CURLOPT_URL, ps->url);
1286 curl_easy_setopt(ps->send_endpoint, CURLOPT_PUT, 1L);
1287 curl_easy_setopt(ps->send_endpoint, CURLOPT_HEADERFUNCTION, &curl_put_header_function);
1288 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEHEADER, ps);
1289 curl_easy_setopt(ps->send_endpoint, CURLOPT_READFUNCTION, curl_send_cb);
1290 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1291 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEFUNCTION, curl_receive_cb);
1292 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1293 curl_easy_setopt(ps->send_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1294 curl_easy_setopt(ps->send_endpoint, CURLOPT_PRIVATE, ps);
1295 curl_easy_setopt(ps->send_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1296 curl_easy_setopt(ps->send_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1298 mret = curl_multi_add_handle(plugin->multi_handle, ps->send_endpoint);
1299 if (mret != CURLM_OK)
1301 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1302 _("Connection: %X: %s failed at %s:%d: `%s'\n"),
1304 "curl_multi_add_handle", __FILE__, __LINE__,
1305 curl_multi_strerror (mret));
1306 return GNUNET_SYSERR;
1309 if (curl_schedule (plugin) == GNUNET_SYSERR)
1310 return GNUNET_SYSERR;
1313 if (ps->direction == INBOUND)
1315 GNUNET_assert (NULL != ps->pending_msgs_tail);
1316 if ((ps->recv_connected==GNUNET_YES) && (ps->send_connected==GNUNET_YES) &&
1317 (ps->recv_force_disconnect==GNUNET_NO) && (ps->recv_force_disconnect==GNUNET_NO))
1320 return GNUNET_SYSERR;
1323 static void curl_perform (void *cls,
1324 const struct GNUNET_SCHEDULER_TaskContext *tc)
1326 struct Plugin *plugin = cls;
1327 static unsigned int handles_last_run;
1329 struct CURLMsg *msg;
1331 struct Session *ps = NULL;
1332 struct HTTP_PeerContext *pc = NULL;
1333 struct HTTP_Message * cur_msg = NULL;
1336 GNUNET_assert(cls !=NULL);
1338 plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
1339 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1345 mret = curl_multi_perform (plugin->multi_handle, &running);
1346 if ((running < handles_last_run) && (running>0))
1351 msg = curl_multi_info_read (plugin->multi_handle, &running);
1354 /* get session for affected curl handle */
1355 GNUNET_assert ( msg->easy_handle != NULL );
1356 curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, (char *) &ps);
1357 GNUNET_assert ( ps != NULL );
1358 pc = ps->peercontext;
1359 GNUNET_assert ( pc != NULL );
1364 if ( (msg->data.result != CURLE_OK) &&
1365 (msg->data.result != CURLE_GOT_NOTHING) )
1367 /* sending msg failed*/
1368 if (msg->easy_handle == ps->send_endpoint)
1370 #if DEBUG_CONNECTIONS
1371 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1372 _("Connection %X: HTTP PUT to peer `%s' (`%s') failed: `%s' `%s'\n"),
1374 GNUNET_i2s(&pc->identity),
1375 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1376 "curl_multi_perform",
1377 curl_easy_strerror (msg->data.result));
1379 ps->send_connected = GNUNET_NO;
1380 ps->send_active = GNUNET_NO;
1381 curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1382 curl_easy_cleanup(ps->send_endpoint);
1383 ps->send_endpoint=NULL;
1384 cur_msg = ps->pending_msgs_tail;
1385 if (( NULL != cur_msg) && ( NULL != cur_msg->transmit_cont))
1386 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1388 /* GET connection failed */
1389 if (msg->easy_handle == ps->recv_endpoint)
1391 #if DEBUG_CONNECTIONS
1392 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1393 _("Connection %X: HTTP GET to peer `%s' (`%s') failed: `%s' `%s'\n"),
1395 GNUNET_i2s(&pc->identity),
1396 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1397 "curl_multi_perform",
1398 curl_easy_strerror (msg->data.result));
1400 ps->recv_connected = GNUNET_NO;
1401 ps->recv_active = GNUNET_NO;
1402 curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1403 curl_easy_cleanup(ps->recv_endpoint);
1404 ps->recv_endpoint=NULL;
1409 if (msg->easy_handle == ps->send_endpoint)
1411 GNUNET_assert (CURLE_OK == curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &http_result));
1412 #if DEBUG_CONNECTIONS
1413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1414 "Connection %X: HTTP PUT connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1416 GNUNET_i2s(&pc->identity),
1417 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1420 /* Calling transmit continuation */
1421 cur_msg = ps->pending_msgs_tail;
1422 if (( NULL != cur_msg) && (NULL != cur_msg->transmit_cont))
1424 /* HTTP 1xx : Last message before here was informational */
1425 if ((http_result >=100) && (http_result < 200))
1426 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1427 /* HTTP 2xx: successful operations */
1428 if ((http_result >=200) && (http_result < 300))
1429 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1430 /* HTTP 3xx..5xx: error */
1431 if ((http_result >=300) && (http_result < 600))
1432 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1434 ps->send_connected = GNUNET_NO;
1435 ps->send_active = GNUNET_NO;
1436 curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1437 curl_easy_cleanup(ps->send_endpoint);
1438 ps->send_endpoint =NULL;
1440 if (msg->easy_handle == ps->recv_endpoint)
1442 #if DEBUG_CONNECTIONS
1443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1444 "Connection %X: HTTP GET connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1446 GNUNET_i2s(&pc->identity),
1447 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1450 ps->recv_connected = GNUNET_NO;
1451 ps->recv_active = GNUNET_NO;
1452 curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1453 curl_easy_cleanup(ps->recv_endpoint);
1454 ps->recv_endpoint=NULL;
1457 if ((ps->recv_connected == GNUNET_NO) && (ps->send_connected == GNUNET_NO))
1458 remove_session (pc, ps, GNUNET_YES, GNUNET_SYSERR);
1465 while ( (running > 0) );
1467 handles_last_run = running;
1469 while (mret == CURLM_CALL_MULTI_PERFORM);
1470 curl_schedule(plugin);
1475 * Function setting up file descriptors and scheduling task to run
1476 * @param ses session to send data to
1477 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
1479 static int curl_schedule(void *cls )
1481 struct Plugin *plugin = cls;
1486 struct GNUNET_NETWORK_FDSet *grs;
1487 struct GNUNET_NETWORK_FDSet *gws;
1491 GNUNET_assert(cls !=NULL);
1493 /* Cancel previous scheduled task */
1494 if (plugin->http_curl_task != GNUNET_SCHEDULER_NO_TASK)
1496 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_curl_task);
1497 plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
1504 mret = curl_multi_fdset (plugin->multi_handle, &rs, &ws, &es, &max);
1505 if (mret != CURLM_OK)
1507 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1508 _("%s failed at %s:%d: `%s'\n"),
1509 "curl_multi_fdset", __FILE__, __LINE__,
1510 curl_multi_strerror (mret));
1511 return GNUNET_SYSERR;
1513 mret = curl_multi_timeout (plugin->multi_handle, &to);
1514 if (mret != CURLM_OK)
1516 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1517 _("%s failed at %s:%d: `%s'\n"),
1518 "curl_multi_timeout", __FILE__, __LINE__,
1519 curl_multi_strerror (mret));
1520 return GNUNET_SYSERR;
1523 grs = GNUNET_NETWORK_fdset_create ();
1524 gws = GNUNET_NETWORK_fdset_create ();
1525 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1526 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1527 plugin->http_curl_task = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1528 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1529 GNUNET_SCHEDULER_NO_TASK,
1530 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
1535 GNUNET_NETWORK_fdset_destroy (gws);
1536 GNUNET_NETWORK_fdset_destroy (grs);
1542 * Function that can be used by the transport service to transmit
1543 * a message using the plugin. Note that in the case of a
1544 * peer disconnecting, the continuation MUST be called
1545 * prior to the disconnect notification itself. This function
1546 * will be called with this peer's HELLO message to initiate
1547 * a fresh connection to another peer.
1549 * @param cls closure
1550 * @param target who should receive this message
1551 * @param msgbuf the message to transmit
1552 * @param msgbuf_size number of bytes in 'msgbuf'
1553 * @param priority how important is the message (most plugins will
1554 * ignore message priority and just FIFO)
1555 * @param timeout how long to wait at most for the transmission (does not
1556 * require plugins to discard the message after the timeout,
1557 * just advisory for the desired delay; most plugins will ignore
1559 * @param session which session must be used (or NULL for "any")
1560 * @param addr the address to use (can be NULL if the plugin
1561 * is "on its own" (i.e. re-use existing TCP connection))
1562 * @param addrlen length of the address in bytes
1563 * @param force_address GNUNET_YES if the plugin MUST use the given address,
1564 * GNUNET_NO means the plugin may use any other address and
1565 * GNUNET_SYSERR means that only reliable existing
1566 * bi-directional connections should be used (regardless
1568 * @param cont continuation to call once the message has
1569 * been transmitted (or if the transport is ready
1570 * for the next transmission call; or if the
1571 * peer disconnected...); can be NULL
1572 * @param cont_cls closure for cont
1573 * @return number of bytes used (on the physical network, with overheads);
1574 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1575 * and does NOT mean that the message was not transmitted (DV)
1578 http_plugin_send (void *cls,
1579 const struct GNUNET_PeerIdentity *target,
1582 unsigned int priority,
1583 struct GNUNET_TIME_Relative to,
1584 struct Session *session,
1588 GNUNET_TRANSPORT_TransmitContinuation cont,
1591 struct Plugin *plugin = cls;
1592 struct HTTP_Message *msg;
1594 struct HTTP_PeerContext * pc;
1595 struct Session * ps = NULL;
1596 struct Session * ps_tmp = NULL;
1598 GNUNET_assert(cls !=NULL);
1600 char * force = GNUNET_malloc(40);
1601 if (force_address == GNUNET_YES)
1602 strcpy(force,"forced addr.");
1603 if (force_address == GNUNET_NO)
1604 strcpy(force,"any addr.");
1605 if (force_address == GNUNET_SYSERR)
1606 strcpy(force,"reliable bi-direc. address addr.");
1607 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport tells me to send %u bytes to `%s' using %s (%s) and session: %X\n",
1611 http_plugin_address_to_string(NULL, addr, addrlen),
1615 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1619 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
1620 pc->plugin = plugin;
1621 pc->session_id_counter=1;
1622 memcpy(&pc->identity, target, sizeof(struct GNUNET_PeerIdentity));
1623 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1626 /* Search for existing session using the passed address */
1627 if ((addr!=NULL) && (addrlen != 0))
1629 ps = get_Session(plugin, pc, addr, addrlen);
1632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Found existing connection to peer %s with given address, using %X\n", GNUNET_i2s(target), ps);
1634 /* Search for existing session using the passed session */
1635 if ((ps==NULL) && (force_address != GNUNET_YES))
1638 while (ps_tmp!=NULL)
1640 if ((ps_tmp==session) && (ps_tmp->recv_force_disconnect==GNUNET_NO) && (ps_tmp->send_force_disconnect==GNUNET_NO) &&
1641 (ps_tmp->recv_connected==GNUNET_YES) && (ps_tmp->send_connected==GNUNET_YES))
1643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Found existing connection to peer %s with given session, using inbound session %X\n", GNUNET_i2s(target), ps_tmp);
1647 ps_tmp=ps_tmp->next;
1651 /* session not existing, address not forced -> looking for other session */
1652 if ((ps==NULL) && (force_address != GNUNET_YES))
1654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection, but free to choose existing, searching for existing connection to peer %s\n", GNUNET_i2s(target));
1655 /* Choosing different session to peer when possible */
1656 struct Session * tmp = pc->head;
1659 if ((tmp->recv_connected) && (tmp->send_connected) && (tmp->recv_force_disconnect==GNUNET_NO) && (tmp->send_force_disconnect==GNUNET_NO))
1666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, selected connection %X\n", GNUNET_i2s(target),ps);
1668 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, no connection found\n", GNUNET_i2s(target));
1671 /* session not existing, but address forced -> creating new session */
1672 if ((ps==NULL) || ((ps==NULL) && (force_address == GNUNET_YES)))
1674 if ((addr!=NULL) && (addrlen!=0))
1676 if (force_address == GNUNET_YES)
1677 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection & forced address: creating new connection to peer %s\n", GNUNET_i2s(target));
1678 if (force_address != GNUNET_YES)
1679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection: creating new connection to peer %s\n", GNUNET_i2s(target));
1681 ps = GNUNET_malloc(sizeof (struct Session));
1682 if ((addrlen!=0) && (addr!=NULL))
1684 ps->addr = GNUNET_malloc(addrlen);
1685 memcpy(ps->addr,addr,addrlen);
1686 ps->addrlen = addrlen;
1693 ps->direction=OUTBOUND;
1694 ps->recv_connected = GNUNET_NO;
1695 ps->recv_force_disconnect = GNUNET_NO;
1696 ps->send_connected = GNUNET_NO;
1697 ps->send_force_disconnect = GNUNET_NO;
1698 ps->pending_msgs_head = NULL;
1699 ps->pending_msgs_tail = NULL;
1701 ps->session_id = pc->session_id_counter;
1702 pc->session_id_counter++;
1703 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
1704 if (ps->msgtok == NULL)
1705 ps->msgtok = GNUNET_SERVER_mst_create (&curl_receive_mst_cb, ps);
1706 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
1710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing session & and no address given: no way to send this message to peer `%s'!\n", GNUNET_i2s(target));
1711 return GNUNET_SYSERR;
1716 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
1718 msg->size = msgbuf_size;
1720 msg->buf = (char *) &msg[1];
1721 msg->transmit_cont = cont;
1722 msg->transmit_cont_cls = cont_cls;
1723 memcpy (msg->buf,msgbuf, msgbuf_size);
1724 GNUNET_CONTAINER_DLL_insert(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
1726 if (send_check_connections (plugin, ps) != GNUNET_SYSERR)
1729 return GNUNET_SYSERR;
1735 * Function that can be used to force the plugin to disconnect
1736 * from the given peer and cancel all previous transmissions
1737 * (and their continuationc).
1739 * @param cls closure
1740 * @param target peer from which to disconnect
1743 http_plugin_disconnect (void *cls,
1744 const struct GNUNET_PeerIdentity *target)
1748 struct Plugin *plugin = cls;
1749 struct HTTP_PeerContext *pc = NULL;
1750 struct Session *ps = NULL;
1751 //struct Session *tmp = NULL;
1753 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1760 /* Telling transport that session is getting disconnected */
1761 plugin->env->session_end(plugin, target, ps);
1762 if (ps->direction==OUTBOUND)
1764 if (ps->send_endpoint!=NULL)
1766 //GNUNET_assert(CURLM_OK == curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint));
1767 //curl_easy_cleanup(ps->send_endpoint);
1768 //ps->send_endpoint=NULL;
1769 ps->send_force_disconnect = GNUNET_YES;
1771 if (ps->recv_endpoint!=NULL)
1773 //GNUNET_assert(CURLM_OK == curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint));
1774 //curl_easy_cleanup(ps->recv_endpoint);
1775 //ps->recv_endpoint=NULL;
1776 ps->recv_force_disconnect = GNUNET_YES;
1780 if (ps->direction==INBOUND)
1782 ps->recv_force_disconnect = GNUNET_YES;
1783 ps->send_force_disconnect = GNUNET_YES;
1786 while (ps->pending_msgs_head!=NULL)
1788 remove_http_message(ps, ps->pending_msgs_head);
1790 ps->recv_active = GNUNET_NO;
1791 ps->send_active = GNUNET_NO;
1798 * Convert the transports address to a nice, human-readable
1801 * @param cls closure
1802 * @param type name of the transport that generated the address
1803 * @param addr one of the addresses of the host, NULL for the last address
1804 * the specific address format depends on the transport
1805 * @param addrlen length of the address
1806 * @param numeric should (IP) addresses be displayed in numeric form?
1807 * @param timeout after how long should we give up?
1808 * @param asc function to call on each string
1809 * @param asc_cls closure for asc
1812 http_plugin_address_pretty_printer (void *cls,
1817 struct GNUNET_TIME_Relative timeout,
1818 GNUNET_TRANSPORT_AddressStringCallback
1821 const struct IPv4HttpAddress *t4;
1822 const struct IPv6HttpAddress *t6;
1823 struct sockaddr_in a4;
1824 struct sockaddr_in6 a6;
1830 GNUNET_assert(cls !=NULL);
1831 if (addrlen == sizeof (struct IPv6HttpAddress))
1833 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1835 a6.sin6_addr = t6->ipv6_addr;
1836 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1837 port = ntohs(t6->u6_port);
1839 else if (addrlen == sizeof (struct IPv4HttpAddress))
1841 address = GNUNET_malloc (INET_ADDRSTRLEN);
1843 a4.sin_addr.s_addr = t4->ipv4_addr;
1844 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1845 port = ntohs(t4->u_port);
1849 /* invalid address */
1850 GNUNET_break_op (0);
1851 asc (asc_cls, NULL);
1854 res = GNUNET_asprintf(&ret,"http://%s:%u/",address,port);
1855 GNUNET_free (address);
1856 GNUNET_assert(res != 0);
1864 * Another peer has suggested an address for this
1865 * peer and transport plugin. Check that this could be a valid
1866 * address. If so, consider adding it to the list
1869 * @param cls closure
1870 * @param addr pointer to the address
1871 * @param addrlen length of addr
1872 * @return GNUNET_OK if this is a plausible address for this peer
1876 http_plugin_address_suggested (void *cls,
1877 const void *addr, size_t addrlen)
1879 struct Plugin *plugin = cls;
1880 struct IPv4HttpAddress *v4;
1881 struct IPv6HttpAddress *v6;
1884 GNUNET_assert(cls !=NULL);
1885 if ((addrlen != sizeof (struct IPv4HttpAddress)) &&
1886 (addrlen != sizeof (struct IPv6HttpAddress)))
1888 return GNUNET_SYSERR;
1890 if (addrlen == sizeof (struct IPv4HttpAddress))
1892 v4 = (struct IPv4HttpAddress *) addr;
1893 /* Not skipping loopback
1894 if (INADDR_LOOPBACK == ntohl(v4->ipv4_addr))
1896 return GNUNET_SYSERR;
1898 port = ntohs (v4->u_port);
1899 if (port != plugin->port_inbound)
1901 return GNUNET_SYSERR;
1904 if (addrlen == sizeof (struct IPv6HttpAddress))
1906 v6 = (struct IPv6HttpAddress *) addr;
1907 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1909 return GNUNET_SYSERR;
1911 port = ntohs (v6->u6_port);
1912 if (port != plugin->port_inbound)
1914 return GNUNET_SYSERR;
1923 * Function called for a quick conversion of the binary address to
1924 * a numeric address. Note that the caller must not free the
1925 * address and that the next call to this function is allowed
1926 * to override the address again.
1928 * @param cls closure
1929 * @param addr binary address
1930 * @param addrlen length of the address
1931 * @return string representing the same address
1934 http_plugin_address_to_string (void *cls,
1938 const struct IPv4HttpAddress *t4;
1939 const struct IPv6HttpAddress *t6;
1940 struct sockaddr_in a4;
1941 struct sockaddr_in6 a6;
1947 if (addrlen == sizeof (struct IPv6HttpAddress))
1949 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1951 a6.sin6_addr = t6->ipv6_addr;
1952 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1953 port = ntohs(t6->u6_port);
1955 else if (addrlen == sizeof (struct IPv4HttpAddress))
1957 address = GNUNET_malloc (INET_ADDRSTRLEN);
1959 a4.sin_addr.s_addr = t4->ipv4_addr;
1960 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1961 port = ntohs(t4->u_port);
1965 /* invalid address */
1968 res = GNUNET_asprintf(&ret,"%s:%u",address,port);
1969 GNUNET_free (address);
1970 GNUNET_assert(res != 0);
1975 * Add the IP of our network interface to the list of
1976 * our external IP addresses.
1978 * @param cls the 'struct Plugin*'
1979 * @param name name of the interface
1980 * @param isDefault do we think this may be our default interface
1981 * @param addr address of the interface
1982 * @param addrlen number of bytes in addr
1983 * @return GNUNET_OK to continue iterating
1986 process_interfaces (void *cls,
1989 const struct sockaddr *addr, socklen_t addrlen)
1991 struct Plugin *plugin = cls;
1992 struct IPv4HttpAddress * t4;
1993 struct IPv6HttpAddress * t6;
1996 GNUNET_assert(cls !=NULL);
1997 af = addr->sa_family;
2000 t4 = GNUNET_malloc(sizeof(struct IPv4HttpAddress));
2001 /* Not skipping loopback addresses
2002 if (INADDR_LOOPBACK == ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr))
2008 t4->ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
2009 t4->u_port = htons (plugin->port_inbound);
2010 plugin->env->notify_address(plugin->env->cls,"http",t4, sizeof (struct IPv4HttpAddress), GNUNET_TIME_UNIT_FOREVER_REL);
2013 else if (af == AF_INET6)
2015 t6 = GNUNET_malloc(sizeof(struct IPv6HttpAddress));
2016 if (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr))
2018 /* skip link local addresses */
2021 /* Not skipping loopback addresses
2022 if (IN6_IS_ADDR_LOOPBACK (&((struct sockaddr_in6 *) addr)->sin6_addr))
2028 memcpy (&t6->ipv6_addr,
2029 &((struct sockaddr_in6 *) addr)->sin6_addr,
2030 sizeof (struct in6_addr));
2031 t6->u6_port = htons (plugin->port_inbound);
2032 plugin->env->notify_address(plugin->env->cls,"http",t6,sizeof (struct IPv6HttpAddress) , GNUNET_TIME_UNIT_FOREVER_REL);
2038 int remove_peer_context_Iterator (void *cls, const GNUNET_HashCode *key, void *value)
2040 struct Plugin *plugin = cls;
2041 struct HTTP_PeerContext * pc = value;
2042 struct Session * ps = pc->head;
2043 struct Session * tmp = NULL;
2044 struct HTTP_Message * msg = NULL;
2045 struct HTTP_Message * msg_tmp = NULL;
2047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing context for peer `%s'\n",GNUNET_i2s(&pc->identity));
2051 plugin->env->session_end(plugin, &pc->identity, ps);
2054 GNUNET_free_non_null (ps->addr);
2055 GNUNET_free(ps->url);
2056 if (ps->msgtok != NULL)
2057 GNUNET_SERVER_mst_destroy (ps->msgtok);
2059 msg = ps->pending_msgs_head;
2062 msg_tmp = msg->next;
2066 if (ps->direction==OUTBOUND)
2068 if (ps->send_endpoint!=NULL)
2069 curl_easy_cleanup(ps->send_endpoint);
2070 if (ps->recv_endpoint!=NULL)
2071 curl_easy_cleanup(ps->recv_endpoint);
2083 * Exit point from the plugin.
2086 libgnunet_plugin_transport_http_done (void *cls)
2088 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
2089 struct Plugin *plugin = api->cls;
2091 GNUNET_assert(cls !=NULL);
2093 if (plugin->http_server_daemon_v4 != NULL)
2095 MHD_stop_daemon (plugin->http_server_daemon_v4);
2096 plugin->http_server_daemon_v4 = NULL;
2098 if (plugin->http_server_daemon_v6 != NULL)
2100 MHD_stop_daemon (plugin->http_server_daemon_v6);
2101 plugin->http_server_daemon_v6 = NULL;
2104 if ( plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2106 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
2107 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
2110 if ( plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2112 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
2113 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2117 /* free all peer information */
2118 if (plugin->peers!=NULL)
2120 GNUNET_CONTAINER_multihashmap_iterate (plugin->peers,
2121 &remove_peer_context_Iterator,
2123 GNUNET_CONTAINER_multihashmap_destroy (plugin->peers);
2125 if (plugin->multi_handle!=NULL)
2127 mret = curl_multi_cleanup(plugin->multi_handle);
2128 if ( CURLM_OK != mret)
2129 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed\n");
2130 plugin->multi_handle = NULL;
2132 curl_global_cleanup();
2134 if ( plugin->http_curl_task != GNUNET_SCHEDULER_NO_TASK)
2136 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_curl_task);
2137 plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
2140 GNUNET_free (plugin);
2142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unload http plugin complete...\n");
2148 * Entry point for the plugin.
2151 libgnunet_plugin_transport_http_init (void *cls)
2153 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2154 struct Plugin *plugin;
2155 struct GNUNET_TRANSPORT_PluginFunctions *api;
2156 struct GNUNET_TIME_Relative gn_timeout;
2157 long long unsigned int port;
2159 GNUNET_assert(cls !=NULL);
2160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
2162 plugin = GNUNET_malloc (sizeof (struct Plugin));
2163 plugin->stats = env->stats;
2165 plugin->peers = NULL;
2167 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2169 api->send = &http_plugin_send;
2170 api->disconnect = &http_plugin_disconnect;
2171 api->address_pretty_printer = &http_plugin_address_pretty_printer;
2172 api->check_address = &http_plugin_address_suggested;
2173 api->address_to_string = &http_plugin_address_to_string;
2175 /* Hashing our identity to use it in URLs */
2176 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &plugin->my_ascii_hash_ident);
2178 /* Reading port number from config file */
2180 GNUNET_CONFIGURATION_get_value_number (env->cfg,
2186 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2189 ("Require valid port number for transport plugin `%s' in configuration!\n"),
2191 libgnunet_plugin_transport_http_done (api);
2194 GNUNET_assert ((port > 0) && (port <= 65535));
2195 plugin->port_inbound = port;
2196 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
2197 unsigned int timeout = (gn_timeout.value) / 1000;
2198 if ((plugin->http_server_daemon_v4 == NULL) && (plugin->http_server_daemon_v6 == NULL) && (port != 0))
2200 plugin->http_server_daemon_v6 = MHD_start_daemon (
2207 plugin , &mdh_access_cb, plugin,
2208 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 32,
2209 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 6,
2210 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) timeout,
2211 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2212 MHD_OPTION_NOTIFY_COMPLETED, &mhd_termination_cb, NULL,
2214 plugin->http_server_daemon_v4 = MHD_start_daemon (
2221 plugin , &mdh_access_cb, plugin,
2222 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 32,
2223 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 6,
2224 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) timeout,
2225 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2226 MHD_OPTION_NOTIFY_COMPLETED, &mhd_termination_cb, NULL,
2229 if (plugin->http_server_daemon_v4 != NULL)
2230 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
2231 if (plugin->http_server_daemon_v6 != NULL)
2232 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
2234 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
2236 else if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
2240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No MHD was started, transport plugin not functional!\n");
2241 libgnunet_plugin_transport_http_done (api);
2245 /* Initializing cURL */
2246 curl_global_init(CURL_GLOBAL_ALL);
2247 plugin->multi_handle = curl_multi_init();
2249 if ( NULL == plugin->multi_handle )
2251 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2253 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
2255 libgnunet_plugin_transport_http_done (api);
2259 plugin->peers = GNUNET_CONTAINER_multihashmap_create (10);
2260 GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
2265 /* end of plugin_transport_http.c */