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.
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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>
43 #define DEBUG_CURL GNUNET_NO
44 #define DEBUG_HTTP GNUNET_NO
45 #define DEBUG_CONNECTIONS GNUNET_YES
47 #define INBOUND GNUNET_NO
48 #define OUTBOUND GNUNET_YES
51 * Text of the response sent back after the last bytes of a PUT
52 * request have been received (just to formally obey the HTTP
55 #define HTTP_PUT_RESPONSE "Thank you!"
58 * After how long do we expire an address that we
59 * learned from another peer if it is not reconfirmed
62 #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
65 * Page returned if request invalid
67 #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>"
70 * Timeout for a http connect
72 #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;
307 unsigned int port_inbound;
309 struct GNUNET_CONTAINER_MultiHashMap *peers;
312 * Daemon for listening for new IPv4 connections.
314 struct MHD_Daemon *http_server_daemon_v4;
317 * Daemon for listening for new IPv6connections.
319 struct MHD_Daemon *http_server_daemon_v6;
322 * Our primary task for http daemon handling IPv4 connections
324 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v4;
327 * Our primary task for http daemon handling IPv6 connections
329 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v6;
332 * The task sending data
334 GNUNET_SCHEDULER_TaskIdentifier http_server_task_send;
339 CURLM * multi_handle;
342 * Our ASCII encoded, hashed peer identity
343 * This string is used to distinguish between connections and is added to the urls
345 struct GNUNET_CRYPTO_HashAsciiEncoded my_ascii_hash_ident;
350 * Function called for a quick conversion of the binary address to
351 * a numeric address. Note that the caller must not free the
352 * address and that the next call to this function is allowed
353 * to override the address again.
356 * @param addr binary address
357 * @param addrlen length of the address
358 * @return string representing the same address
361 http_plugin_address_to_string (void *cls,
365 static char * create_url(void * cls, const void * addr, size_t addrlen, size_t id)
367 struct Plugin *plugin = cls;
370 GNUNET_assert ((addr!=NULL) && (addrlen != 0));
371 GNUNET_asprintf(&url,
373 http_plugin_address_to_string(NULL, addr, addrlen),
374 (char *) (&plugin->my_ascii_hash_ident),id);
380 * Removes a message from the linked list of messages
381 * @param con connection to remove message from
382 * @param msg message to remove
383 * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
385 static int remove_http_message (struct Session * ps, struct HTTP_Message * msg)
387 GNUNET_CONTAINER_DLL_remove(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
393 * Removes a session from the linked list of sessions
394 * @param pc peer context
396 * @param call_msg_cont GNUNET_YES to call pending message continuations, otherwise no
397 * @param call_msg_cont_result, result to call message continuations with
398 * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
400 static int remove_session (struct HTTP_PeerContext * pc, struct Session * ps, int call_msg_cont, int call_msg_cont_result)
402 struct HTTP_Message * msg;
404 GNUNET_free(ps->addr);
405 GNUNET_SERVER_mst_destroy (ps->msgtok);
406 GNUNET_free(ps->url);
408 msg = ps->pending_msgs_head;
411 if ((call_msg_cont == GNUNET_YES) && (msg->transmit_cont!=NULL))
413 msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,call_msg_cont_result);
416 GNUNET_CONTAINER_DLL_remove(ps->pending_msgs_head,ps->pending_msgs_head,msg);
419 GNUNET_CONTAINER_DLL_remove(pc->head,pc->tail,ps);
425 static struct Session * get_Session (void * cls, struct HTTP_PeerContext *pc, const void * addr, size_t addr_len)
427 struct Session * cc = pc->head;
428 struct Session * con = NULL;
429 unsigned int count = 0;
431 GNUNET_assert((addr_len == sizeof (struct IPv4HttpAddress)) || (addr_len == sizeof (struct IPv6HttpAddress)));
434 if (addr_len == cc->addrlen)
436 if (0 == memcmp(cc->addr, addr, addr_len))
438 /* connection can not be used, since it is disconnected */
439 if ((cc->recv_force_disconnect==GNUNET_NO) && (cc->send_force_disconnect==GNUNET_NO))
452 * Callback called by MHD when a connection is terminated
454 static void requestCompletedCallback (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
456 struct Session * ps = *httpSessionCache;
459 struct HTTP_PeerContext * pc = ps->peercontext;
461 if (connection==ps->recv_endpoint)
463 #if DEBUG_CONNECTIONS
464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
466 ps->recv_active = GNUNET_NO;
467 ps->recv_connected = GNUNET_NO;
468 ps->recv_endpoint = NULL;
470 if (connection==ps->send_endpoint)
473 ps->send_active = GNUNET_NO;
474 ps->send_connected = GNUNET_NO;
475 ps->send_endpoint = NULL;
476 #if DEBUG_CONNECTIONS
477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
481 /* if both connections disconnected, remove session */
482 if ((ps->send_connected == GNUNET_NO) && (ps->recv_connected == GNUNET_NO))
484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: removing session\n", ps);
485 remove_session(pc,ps,GNUNET_YES,GNUNET_SYSERR);
489 static void mhd_write_mst_cb (void *cls,
491 const struct GNUNET_MessageHeader *message)
494 struct Session *ps = cls;
495 struct HTTP_PeerContext *pc = ps->peercontext;
496 GNUNET_assert(ps != NULL);
497 GNUNET_assert(pc != NULL);
499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
500 "Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
501 ntohs(message->type),
502 ntohs(message->size),
503 GNUNET_i2s(&(ps->peercontext)->identity),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
505 pc->plugin->env->receive (ps->peercontext->plugin->env->cls,
512 static void curl_write_mst_cb (void *cls,
514 const struct GNUNET_MessageHeader *message)
516 struct Session *ps = cls;
517 struct HTTP_PeerContext *pc = ps->peercontext;
518 GNUNET_assert(ps != NULL);
519 GNUNET_assert(pc != NULL);
521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
522 "Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
523 ntohs(message->type),
524 ntohs(message->size),
525 GNUNET_i2s(&(pc->identity)),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
527 pc->plugin->env->receive (pc->plugin->env->cls,
536 * Check if ip is allowed to connect.
539 acceptPolicyCallback (void *cls,
540 const struct sockaddr *addr, socklen_t addr_len)
543 struct Plugin *plugin = cls;
545 /* Every connection is accepted, nothing more to do here */
549 int server_read_callback (void *cls, uint64_t pos, char *buf, int max)
553 struct Session * ps = cls;
554 struct HTTP_PeerContext * pc;
555 struct HTTP_Message * msg;
558 GNUNET_assert (ps!=NULL);
559 pc = ps->peercontext;
560 msg = ps->pending_msgs_tail;
562 if (ps->send_force_disconnect)
564 #if DEBUG_CONNECTIONS
565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound forced to disconnect\n",ps);
572 if ((msg->size-msg->pos) <= max)
574 memcpy(buf,&msg->buf[pos],(msg->size-msg->pos));
575 pos+=(msg->size-msg->pos);
579 memcpy(buf,&msg->buf[pos],max);
583 if (msg->pos==msg->size)
585 if (NULL!=msg->transmit_cont)
586 msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
587 res = remove_http_message(ps,msg);
594 * Process GET or PUT request received via MHD. For
595 * GET, queue response that will send back our pending
596 * messages. For PUT, process incoming data and send
597 * to GNUnet core. In either case, check if a session
598 * already exists and create a new one if not.
601 accessHandlerCallback (void *cls,
602 struct MHD_Connection *mhd_connection,
606 const char *upload_data,
607 size_t * upload_data_size, void **httpSessionCache)
609 struct Plugin *plugin = cls;
610 struct MHD_Response *response;
611 const union MHD_ConnectionInfo * conn_info;
613 struct sockaddr_in *addrin;
614 struct sockaddr_in6 *addrin6;
616 char address[INET6_ADDRSTRLEN+14];
617 struct GNUNET_PeerIdentity pi_in;
620 struct IPv4HttpAddress ipv4addr;
621 struct IPv6HttpAddress ipv6addr;
623 struct HTTP_PeerContext *pc;
625 struct Session *ps_tmp;
628 int send_error_to_client;
632 GNUNET_assert(cls !=NULL);
633 send_error_to_client = GNUNET_NO;
635 if (NULL == *httpSessionCache)
637 /* check url for peer identity , if invalid send HTTP 404*/
638 size_t len = strlen(&url[1]);
639 char * peer = GNUNET_malloc(104+1);
641 if ((len>104) && (url[104]==';'))
643 char * id = GNUNET_malloc((len-104)+1);
644 strcpy(id,&url[105]);
645 memcpy(peer,&url[1],103);
647 id_num = strtoul ( id, NULL , 10);
650 res = GNUNET_CRYPTO_hash_from_string (peer, &(pi_in.hashPubKey));
652 if ( GNUNET_SYSERR == res )
654 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
655 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
656 MHD_destroy_response (response);
658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, sent HTTP 1.1/404\n");
660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, could not send error\n");
666 ps = *httpSessionCache;
667 pc = ps->peercontext;
670 if (NULL == *httpSessionCache)
672 /* get peer context */
673 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &pi_in.hashPubKey);
677 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
679 pc->session_id_counter=1;
680 memcpy(&pc->identity, &pi_in, sizeof(struct GNUNET_PeerIdentity));
681 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
684 conn_info = MHD_get_connection_info(mhd_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
685 /* Incoming IPv4 connection */
686 if ( AF_INET == conn_info->client_addr->sin_family)
688 addrin = conn_info->client_addr;
689 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
690 memcpy(&ipv4addr.ipv4_addr,&(addrin->sin_addr),sizeof(struct in_addr));
691 ipv4addr.u_port = addrin->sin_port;
693 addr_len = sizeof(struct IPv4HttpAddress);
695 /* Incoming IPv6 connection */
696 if ( AF_INET6 == conn_info->client_addr->sin_family)
698 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
699 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
700 memcpy(&ipv6addr.ipv6_addr,&(addrin6->sin6_addr),sizeof(struct in6_addr));
701 ipv6addr.u6_port = addrin6->sin6_port;
703 addr_len = sizeof(struct IPv6HttpAddress);
707 ps = get_Session(plugin, pc, addr, addr_len);
709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"NO EXIST HTTP SESSION\n");
711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"SEARCHING HTTP SESSION\n");
716 if ((ps_tmp->direction==INBOUND) && (ps_tmp->session_id == id_num) && (id_num!=0))
718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"SEARCHING HTTP SESSION II\n");
719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP SESSION: peer: %s addr %s id %u\n",GNUNET_i2s(&ps_tmp->peercontext->identity),ps_tmp->url,ps_tmp->session_id);
721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP SESSION FOUND\n");
730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"NO HTTP SESSION FOUND\n");
731 ps = GNUNET_malloc(sizeof (struct Session));
732 ps->addr = GNUNET_malloc(addr_len);
733 memcpy(ps->addr,addr,addr_len);
734 ps->addrlen = addr_len;
735 ps->direction=INBOUND;
736 ps->pending_msgs_head = NULL;
737 ps->pending_msgs_tail = NULL;
738 ps->send_connected=GNUNET_NO;
739 ps->send_active=GNUNET_NO;
740 ps->recv_connected=GNUNET_NO;
741 ps->recv_active=GNUNET_NO;
743 ps->session_id =id_num;
744 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
745 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP SESSION CREATED, ID %u mhd connection %X\n",ps->session_id, mhd_connection);
749 *httpSessionCache = ps;
750 if (ps->msgtok==NULL)
751 ps->msgtok = GNUNET_SERVER_mst_create (&mhd_write_mst_cb, ps);
753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Daemon has new an incoming `%s' request from peer `%s' (`%s')\n",
755 GNUNET_i2s(&pc->identity),
756 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen));
759 /* Is it a PUT or a GET request */
760 if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
762 if (ps->recv_force_disconnect)
764 #if DEBUG_CONNECTIONS
765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection was forced to disconnect\n",ps);
767 ps->recv_active = GNUNET_NO;
770 if ((*upload_data_size == 0) && (ps->recv_active==GNUNET_NO))
772 ps->recv_endpoint = mhd_connection;
773 ps->recv_connected = GNUNET_YES;
774 ps->recv_active = GNUNET_YES;
778 /* Transmission of all data complete */
779 if ((*upload_data_size == 0) && (ps->recv_active == GNUNET_YES))
781 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
782 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
783 #if DEBUG_CONNECTIONS
784 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Sent HTTP/1.1: 200 OK as PUT Response\n",ps);
786 MHD_destroy_response (response);
787 ps->recv_active=GNUNET_NO;
792 if ((*upload_data_size > 0) && (ps->recv_active == GNUNET_YES))
794 res = GNUNET_SERVER_mst_receive(ps->msgtok, ps, upload_data,*upload_data_size, GNUNET_NO, GNUNET_NO);
795 (*upload_data_size) = 0;
801 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
803 if (ps->send_force_disconnect)
805 #if DEBUG_CONNECTIONS
806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection was forced to disconnect\n",ps);
808 ps->send_active = GNUNET_NO;
811 ps->send_connected = GNUNET_YES;
812 ps->send_active = GNUNET_YES;
813 ps->send_endpoint = mhd_connection;
814 response = MHD_create_response_from_callback(-1,32 * 1024, &server_read_callback, ps, NULL);
815 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
816 MHD_destroy_response (response);
824 * Call MHD to process pending ipv4 requests and then go back
825 * and schedule the next run.
827 static void http_server_daemon_v4_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
829 * Call MHD to process pending ipv6 requests and then go back
830 * and schedule the next run.
832 static void http_server_daemon_v6_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
835 * Function that queries MHD's select sets and
836 * starts the task waiting for them.
838 static GNUNET_SCHEDULER_TaskIdentifier
839 http_server_daemon_prepare (void * cls, struct MHD_Daemon *daemon_handle)
841 struct Plugin *plugin = cls;
842 GNUNET_SCHEDULER_TaskIdentifier ret;
846 struct GNUNET_NETWORK_FDSet *wrs;
847 struct GNUNET_NETWORK_FDSet *wws;
848 struct GNUNET_NETWORK_FDSet *wes;
850 unsigned long long timeout;
852 struct GNUNET_TIME_Relative tv;
854 GNUNET_assert(cls !=NULL);
855 ret = GNUNET_SCHEDULER_NO_TASK;
859 wrs = GNUNET_NETWORK_fdset_create ();
860 wes = GNUNET_NETWORK_fdset_create ();
861 wws = GNUNET_NETWORK_fdset_create ();
863 GNUNET_assert (MHD_YES ==
864 MHD_get_fdset (daemon_handle,
869 haveto = MHD_get_timeout (daemon_handle, &timeout);
870 if (haveto == MHD_YES)
871 tv.value = (uint64_t) timeout;
873 tv = GNUNET_TIME_UNIT_FOREVER_REL;
874 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
875 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
876 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
877 if (daemon_handle == plugin->http_server_daemon_v4)
879 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
880 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
881 GNUNET_SCHEDULER_NO_TASK,
885 &http_server_daemon_v4_run,
888 if (daemon_handle == plugin->http_server_daemon_v6)
890 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
891 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
892 GNUNET_SCHEDULER_NO_TASK,
896 &http_server_daemon_v6_run,
899 GNUNET_NETWORK_fdset_destroy (wrs);
900 GNUNET_NETWORK_fdset_destroy (wws);
901 GNUNET_NETWORK_fdset_destroy (wes);
906 * Call MHD to process pending requests and then go back
907 * and schedule the next run.
909 static void http_server_daemon_v4_run (void *cls,
910 const struct GNUNET_SCHEDULER_TaskContext *tc)
912 struct Plugin *plugin = cls;
914 GNUNET_assert(cls !=NULL);
915 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
916 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
918 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
921 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v4));
922 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
928 * Call MHD to process pending requests and then go back
929 * and schedule the next run.
931 static void http_server_daemon_v6_run (void *cls,
932 const struct GNUNET_SCHEDULER_TaskContext *tc)
934 struct Plugin *plugin = cls;
936 GNUNET_assert(cls !=NULL);
937 if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
938 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
940 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
943 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v6));
944 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
949 * Function setting up curl handle and selecting message to send
951 * @param ses session to send data to
952 * @param con connection
953 * @return bytes sent to peer
955 static ssize_t send_check_connections (void *cls, struct Session *ps);
957 static size_t curl_get_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
959 struct Session * ps = stream;
962 size_t len = size * nmemb;
963 long http_result = 0;
965 /* Getting last http result code */
966 if (ps->recv_connected==GNUNET_NO)
968 GNUNET_assert(NULL!=ps);
969 res = curl_easy_getinfo(ps->recv_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
972 if (http_result == 200)
974 ps->recv_connected = GNUNET_YES;
975 ps->recv_active = GNUNET_YES;
976 #if DEBUG_CONNECTIONS
977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to recieve data\n",ps);
979 // Calling send_check_connections again since receive is established
980 send_check_connections (ps->peercontext->plugin, ps);
986 if ((size * nmemb) < SIZE_MAX)
987 tmp = GNUNET_malloc (len+1);
989 if ((tmp != NULL) && (len > 0))
994 if (tmp[len-2] == 13)
998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
1004 return size * nmemb;
1007 static size_t curl_put_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
1009 struct Session * ps = stream;
1012 size_t len = size * nmemb;
1013 long http_result = 0;
1016 /* Getting last http result code */
1017 GNUNET_assert(NULL!=ps);
1018 res = curl_easy_getinfo(ps->send_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
1019 if (CURLE_OK == res)
1021 if ((http_result == 100) && (ps->send_connected==GNUNET_NO))
1023 ps->send_connected = GNUNET_YES;
1024 ps->send_active = GNUNET_YES;
1025 #if DEBUG_CONNECTIONS
1026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to send data\n",ps);
1029 if ((http_result == 200) && (ps->send_connected==GNUNET_YES))
1031 ps->send_connected = GNUNET_NO;
1032 ps->send_active = GNUNET_NO;
1033 #if DEBUG_CONNECTIONS
1034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: sending disconnected\n",ps);
1040 if ((size * nmemb) < SIZE_MAX)
1041 tmp = GNUNET_malloc (len+1);
1043 if ((tmp != NULL) && (len > 0))
1045 memcpy(tmp,ptr,len);
1048 if (tmp[len-2] == 13)
1052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
1058 return size * nmemb;
1062 * Callback method used with libcurl
1063 * Method is called when libcurl needs to read data during sending
1064 * @param stream pointer where to write data
1065 * @param size size of an individual element
1066 * @param nmemb count of elements that can be written to the buffer
1067 * @param ptr source pointer, passed to the libcurl handle
1068 * @return bytes written to stream
1070 static size_t send_curl_send_callback(void *stream, size_t size, size_t nmemb, void *ptr)
1072 struct Session * ps = ptr;
1073 struct HTTP_Message * msg = ps->pending_msgs_tail;
1077 if (ps->pending_msgs_tail == NULL)
1079 #if DEBUG_CONNECTIONS
1080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: No Message to send, pausing connection\n",ps);
1082 ps->send_active = GNUNET_NO;
1083 return CURL_READFUNC_PAUSE;
1086 msg = ps->pending_msgs_tail;
1088 if (msg->pos < msg->size)
1090 /* data fit in buffer */
1091 if ((msg->size - msg->pos) <= (size * nmemb))
1093 len = (msg->size - msg->pos);
1094 memcpy(stream, &msg->buf[msg->pos], len);
1101 memcpy(stream, &msg->buf[msg->pos], len);
1106 /* no data to send */
1112 if ( msg->pos == msg->size)
1114 #if DEBUG_CONNECTIONS
1115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Message with %u bytes sent, removing message from queue \n",ps, msg->pos);
1117 /* Calling transmit continuation */
1118 if (( NULL != ps->pending_msgs_tail) && (NULL != ps->pending_msgs_tail->transmit_cont))
1119 msg->transmit_cont (ps->pending_msgs_tail->transmit_cont_cls,&(ps->peercontext)->identity,GNUNET_OK);
1120 remove_http_message(ps, msg);
1126 * Callback method used with libcurl
1127 * Method is called when libcurl needs to write data during sending
1128 * @param stream pointer where to write data
1129 * @param size size of an individual element
1130 * @param nmemb count of elements that can be written to the buffer
1131 * @param ptr destination pointer, passed to the libcurl handle
1132 * @return bytes read from stream
1134 static size_t send_curl_receive_callback( void *stream, size_t size, size_t nmemb, void *ptr)
1136 struct Session * ps = ptr;
1137 #if DEBUG_CONNECTIONS
1138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: %u bytes recieved\n",ps, size*nmemb);
1140 GNUNET_SERVER_mst_receive(ps->msgtok, ps, stream, size*nmemb, GNUNET_NO, GNUNET_NO);
1141 return (size * nmemb);
1146 * Function setting up file descriptors and scheduling task to run
1147 * @param cls closure
1148 * @param ses session to send data to
1149 * @return bytes sent to peer
1151 static size_t send_schedule(void *cls, struct Session* ses );
1156 * Function setting up curl handle and selecting message to send
1158 * @param ses session to send data to
1159 * @param con connection
1160 * @return bytes sent to peer
1162 static ssize_t send_check_connections (void *cls, struct Session *ps)
1164 struct Plugin *plugin = cls;
1167 struct HTTP_Message * msg;
1168 struct GNUNET_TIME_Relative timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1170 GNUNET_assert(cls !=NULL);
1172 if (ps->direction == OUTBOUND)
1174 /* RECV DIRECTION */
1175 /* Check if session is connected to receive data, otherwise connect to peer */
1176 if (ps->recv_connected == GNUNET_NO)
1178 if (ps->recv_endpoint == NULL)
1180 ps->recv_endpoint = curl_easy_init();
1182 curl_easy_setopt(ps->recv_endpoint, CURLOPT_VERBOSE, 1L);
1184 curl_easy_setopt(ps->recv_endpoint, CURLOPT_URL, ps->url);
1185 curl_easy_setopt(ps->recv_endpoint, CURLOPT_HEADERFUNCTION, &curl_get_header_function);
1186 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEHEADER, ps);
1187 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READFUNCTION, send_curl_send_callback);
1188 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READDATA, ps);
1189 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEFUNCTION, send_curl_receive_callback);
1190 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEDATA, ps);
1191 curl_easy_setopt(ps->recv_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1192 curl_easy_setopt(ps->recv_endpoint, CURLOPT_PRIVATE, ps);
1193 curl_easy_setopt(ps->recv_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1194 curl_easy_setopt(ps->recv_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1196 mret = curl_multi_add_handle(plugin->multi_handle, ps->recv_endpoint);
1197 if (mret != CURLM_OK)
1199 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1200 _("%s failed at %s:%d: `%s'\n"),
1201 "curl_multi_add_handle", __FILE__, __LINE__,
1202 curl_multi_strerror (mret));
1205 bytes_sent = send_schedule (plugin, NULL);
1206 if (ps->msgtok != NULL)
1207 ps->msgtok = GNUNET_SERVER_mst_create (&curl_write_mst_cb, ps);
1208 #if DEBUG_CONNECTIONS
1209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound not connected, initiating connection\n",ps);
1214 /* waiting for receive direction */
1215 if (ps->recv_connected==GNUNET_NO)
1218 /* SEND DIRECTION */
1219 /* Check if session is connected to send data, otherwise connect to peer */
1220 if ((ps->send_connected == GNUNET_YES) && (ps->send_endpoint!= NULL))
1222 if (ps->send_active == GNUNET_YES)
1224 #if DEBUG_CONNECTIONS
1225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound active, enqueueing message\n",ps);
1229 if (ps->send_active == GNUNET_NO)
1231 #if DEBUG_CONNECTIONS
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound paused, unpausing existing connection and enqueueing message\n",ps);
1234 curl_easy_pause(ps->send_endpoint,CURLPAUSE_CONT);
1235 ps->send_active=GNUNET_YES;
1239 /* not connected, initiate connection */
1240 if ((ps->send_connected==GNUNET_NO) && (NULL == ps->send_endpoint))
1241 ps->send_endpoint = curl_easy_init();
1242 GNUNET_assert (ps->send_endpoint != NULL);
1243 GNUNET_assert (NULL != ps->pending_msgs_tail);
1244 #if DEBUG_CONNECTIONS
1245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound not connected, initiating connection\n",ps);
1247 ps->send_active = GNUNET_NO;
1248 msg = ps->pending_msgs_tail;
1251 curl_easy_setopt(ps->send_endpoint, CURLOPT_VERBOSE, 1L);
1253 curl_easy_setopt(ps->send_endpoint, CURLOPT_URL, ps->url);
1254 curl_easy_setopt(ps->send_endpoint, CURLOPT_PUT, 1L);
1255 curl_easy_setopt(ps->send_endpoint, CURLOPT_HEADERFUNCTION, &curl_put_header_function);
1256 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEHEADER, ps);
1257 curl_easy_setopt(ps->send_endpoint, CURLOPT_READFUNCTION, send_curl_send_callback);
1258 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1259 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEFUNCTION, send_curl_receive_callback);
1260 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1261 curl_easy_setopt(ps->send_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1262 curl_easy_setopt(ps->send_endpoint, CURLOPT_PRIVATE, ps);
1263 curl_easy_setopt(ps->send_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1264 curl_easy_setopt(ps->send_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1266 mret = curl_multi_add_handle(plugin->multi_handle, ps->send_endpoint);
1267 if (mret != CURLM_OK)
1269 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1270 _("%s failed at %s:%d: `%s'\n"),
1271 "curl_multi_add_handle", __FILE__, __LINE__,
1272 curl_multi_strerror (mret));
1275 bytes_sent = send_schedule (plugin, NULL);
1278 if (ps->direction == INBOUND)
1280 GNUNET_assert (NULL != ps->pending_msgs_tail);
1282 msg = ps->pending_msgs_tail;
1283 if ((ps->recv_connected==GNUNET_YES) && (ps->send_connected==GNUNET_YES))
1284 bytes_sent = msg->size;
1290 static void send_execute (void *cls,
1291 const struct GNUNET_SCHEDULER_TaskContext *tc)
1293 struct Plugin *plugin = cls;
1294 static unsigned int handles_last_run;
1296 struct CURLMsg *msg;
1298 struct Session *ps = NULL;
1299 struct HTTP_PeerContext *pc = NULL;
1300 struct HTTP_Message * cur_msg = NULL;
1303 GNUNET_assert(cls !=NULL);
1304 plugin->http_server_task_send = GNUNET_SCHEDULER_NO_TASK;
1305 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1311 mret = curl_multi_perform (plugin->multi_handle, &running);
1312 if (running < handles_last_run)
1317 msg = curl_multi_info_read (plugin->multi_handle, &running);
1320 /* get session for affected curl handle */
1321 GNUNET_assert ( msg->easy_handle != NULL );
1322 curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, (char *) &ps);
1323 GNUNET_assert ( ps != NULL );
1324 pc = ps->peercontext;
1325 GNUNET_assert ( pc != NULL );
1330 if ( (msg->data.result != CURLE_OK) &&
1331 (msg->data.result != CURLE_GOT_NOTHING) )
1333 /* sending msg failed*/
1334 if (msg->easy_handle == ps->send_endpoint)
1336 #if DEBUG_CONNECTIONS
1337 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1338 _("Connection %X: HTTP PUT to peer `%s' (`%s') failed: `%s' `%s'\n"),
1340 GNUNET_i2s(&pc->identity),
1341 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1342 "curl_multi_perform",
1343 curl_easy_strerror (msg->data.result));
1345 ps->send_connected = GNUNET_NO;
1346 ps->send_active = GNUNET_NO;
1347 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1348 curl_easy_cleanup(ps->send_endpoint);
1349 ps->send_endpoint=NULL;
1350 cur_msg = ps->pending_msgs_tail;
1351 if (( NULL != cur_msg) && ( NULL != cur_msg->transmit_cont))
1352 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1354 /* GET connection failed */
1355 if (msg->easy_handle == ps->recv_endpoint)
1357 #if DEBUG_CONNECTIONS
1358 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1359 _("Connection %X: HTTP GET to peer `%s' (`%s') failed: `%s' `%s'\n"),
1361 GNUNET_i2s(&pc->identity),
1362 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1363 "curl_multi_perform",
1364 curl_easy_strerror (msg->data.result));
1366 ps->recv_connected = GNUNET_NO;
1367 ps->recv_active = GNUNET_NO;
1368 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1369 curl_easy_cleanup(ps->recv_endpoint);
1370 ps->recv_endpoint=NULL;
1375 if (msg->easy_handle == ps->send_endpoint)
1377 GNUNET_assert (CURLE_OK == curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &http_result));
1378 #if DEBUG_CONNECTIONS
1379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1380 "Connection %X: HTTP PUT connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1382 GNUNET_i2s(&pc->identity),
1383 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1386 /* Calling transmit continuation */
1387 cur_msg = ps->pending_msgs_tail;
1388 if (( NULL != cur_msg) && (NULL != cur_msg->transmit_cont))
1390 /* HTTP 1xx : Last message before here was informational */
1391 if ((http_result >=100) && (http_result < 200))
1392 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1393 /* HTTP 2xx: successful operations */
1394 if ((http_result >=200) && (http_result < 300))
1395 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1396 /* HTTP 3xx..5xx: error */
1397 if ((http_result >=300) && (http_result < 600))
1398 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1400 ps->send_connected = GNUNET_NO;
1401 ps->send_active = GNUNET_NO;
1402 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1403 curl_easy_cleanup(ps->send_endpoint);
1404 ps->send_endpoint =NULL;
1406 if (msg->easy_handle == ps->recv_endpoint)
1408 #if DEBUG_CONNECTIONS
1409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1410 "Connection %X: HTTP GET connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1412 GNUNET_i2s(&pc->identity),
1413 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1416 ps->recv_connected = GNUNET_NO;
1417 ps->recv_active = GNUNET_NO;
1418 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1419 curl_easy_cleanup(ps->recv_endpoint);
1420 ps->recv_endpoint=NULL;
1423 if (ps->pending_msgs_tail != NULL)
1425 if (ps->pending_msgs_tail->pos>0)
1426 remove_http_message(ps, ps->pending_msgs_tail);
1434 while ( (running > 0) );
1436 handles_last_run = running;
1438 while (mret == CURLM_CALL_MULTI_PERFORM);
1439 send_schedule(plugin, cls);
1444 * Function setting up file descriptors and scheduling task to run
1445 * @param ses session to send data to
1446 * @return bytes sent to peer
1448 static size_t send_schedule(void *cls, struct Session* ses )
1450 struct Plugin *plugin = cls;
1455 struct GNUNET_NETWORK_FDSet *grs;
1456 struct GNUNET_NETWORK_FDSet *gws;
1460 GNUNET_assert(cls !=NULL);
1465 mret = curl_multi_fdset (plugin->multi_handle, &rs, &ws, &es, &max);
1466 if (mret != CURLM_OK)
1468 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1469 _("%s failed at %s:%d: `%s'\n"),
1470 "curl_multi_fdset", __FILE__, __LINE__,
1471 curl_multi_strerror (mret));
1474 mret = curl_multi_timeout (plugin->multi_handle, &to);
1475 if (mret != CURLM_OK)
1477 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1478 _("%s failed at %s:%d: `%s'\n"),
1479 "curl_multi_timeout", __FILE__, __LINE__,
1480 curl_multi_strerror (mret));
1484 grs = GNUNET_NETWORK_fdset_create ();
1485 gws = GNUNET_NETWORK_fdset_create ();
1486 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1487 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1488 plugin->http_server_task_send = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1489 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1490 GNUNET_SCHEDULER_NO_TASK,
1491 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
1496 GNUNET_NETWORK_fdset_destroy (gws);
1497 GNUNET_NETWORK_fdset_destroy (grs);
1499 /* FIXME: return bytes REALLY sent */
1505 * Function that can be used by the transport service to transmit
1506 * a message using the plugin. Note that in the case of a
1507 * peer disconnecting, the continuation MUST be called
1508 * prior to the disconnect notification itself. This function
1509 * will be called with this peer's HELLO message to initiate
1510 * a fresh connection to another peer.
1512 * @param cls closure
1513 * @param target who should receive this message
1514 * @param msgbuf the message to transmit
1515 * @param msgbuf_size number of bytes in 'msgbuf'
1516 * @param priority how important is the message (most plugins will
1517 * ignore message priority and just FIFO)
1518 * @param timeout how long to wait at most for the transmission (does not
1519 * require plugins to discard the message after the timeout,
1520 * just advisory for the desired delay; most plugins will ignore
1522 * @param session which session must be used (or NULL for "any")
1523 * @param addr the address to use (can be NULL if the plugin
1524 * is "on its own" (i.e. re-use existing TCP connection))
1525 * @param addrlen length of the address in bytes
1526 * @param force_address GNUNET_YES if the plugin MUST use the given address,
1527 * GNUNET_NO means the plugin may use any other address and
1528 * GNUNET_SYSERR means that only reliable existing
1529 * bi-directional connections should be used (regardless
1531 * @param cont continuation to call once the message has
1532 * been transmitted (or if the transport is ready
1533 * for the next transmission call; or if the
1534 * peer disconnected...); can be NULL
1535 * @param cont_cls closure for cont
1536 * @return number of bytes used (on the physical network, with overheads);
1537 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1538 * and does NOT mean that the message was not transmitted (DV)
1541 http_plugin_send (void *cls,
1542 const struct GNUNET_PeerIdentity *target,
1545 unsigned int priority,
1546 struct GNUNET_TIME_Relative to,
1547 struct Session *session,
1551 GNUNET_TRANSPORT_TransmitContinuation cont,
1554 struct Plugin *plugin = cls;
1555 struct HTTP_Message *msg;
1557 struct HTTP_PeerContext * pc;
1558 struct Session * ps = NULL;
1560 GNUNET_assert(cls !=NULL);
1562 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1566 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
1567 pc->plugin = plugin;
1568 pc->session_id_counter=1;
1569 memcpy(&pc->identity, target, sizeof(struct GNUNET_PeerIdentity));
1570 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1572 if ((addr!=NULL) && (addrlen != 0))
1574 ps = get_Session(plugin, pc, addr, addrlen);
1577 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Found existing connection to peer %s with given address, using %X\n", GNUNET_i2s(target), ps);
1579 /* session not existing, address not forced -> looking for other session */
1580 if ((ps==NULL) && ((force_address == GNUNET_NO) || (force_address == GNUNET_SYSERR)))
1582 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));
1583 /* Choosing different session to peer when possible */
1584 struct Session * tmp = pc->head;
1587 if ((tmp->recv_connected) && (tmp->send_connected) && (tmp->recv_force_disconnect==GNUNET_NO) && (tmp->send_force_disconnect==GNUNET_NO))
1594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, selected connection %X\n", GNUNET_i2s(target),ps);
1596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, no connection found\n", GNUNET_i2s(target));
1599 /* session not existing, but address forced -> creating new session */
1600 if ((ps==NULL) || ((ps==NULL) && (force_address == GNUNET_YES)))
1602 if ((addr!=NULL) && (addrlen!=0))
1604 if (force_address == GNUNET_YES)
1605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection & forced address: creating new connection to peer %s\n", GNUNET_i2s(target));
1606 if (force_address != GNUNET_YES)
1607 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection: creating new connection to peer %s\n", GNUNET_i2s(target));
1609 ps = GNUNET_malloc(sizeof (struct Session));
1610 ps->addr = GNUNET_malloc(addrlen);
1611 memcpy(ps->addr,addr,addrlen);
1612 ps->addrlen = addrlen;
1613 ps->direction=OUTBOUND;
1614 ps->recv_connected = GNUNET_NO;
1615 ps->recv_force_disconnect = GNUNET_NO;
1616 ps->send_connected = GNUNET_NO;
1617 ps->send_force_disconnect = GNUNET_NO;
1618 ps->pending_msgs_head = NULL;
1619 ps->pending_msgs_tail = NULL;
1621 ps->session_id = pc->session_id_counter;
1622 pc->session_id_counter++;
1623 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
1624 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
1628 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));
1633 char * force = GNUNET_malloc(30);
1634 if (force_address == GNUNET_YES)
1635 strcpy(force,"forced addr.");
1636 if (force_address == GNUNET_NO)
1637 strcpy(force,"any addr.");
1638 if (force_address == GNUNET_SYSERR)
1639 strcpy(force,"reliable bi-direc. address addr.");
1640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport tells me to send %u bytes to `%s' %s (%s), session: %X\n",
1642 GNUNET_i2s(&pc->identity),
1644 http_plugin_address_to_string(NULL, addr, addrlen),
1649 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
1651 msg->size = msgbuf_size;
1653 msg->buf = (char *) &msg[1];
1654 msg->transmit_cont = cont;
1655 msg->transmit_cont_cls = cont_cls;
1656 memcpy (msg->buf,msgbuf, msgbuf_size);
1657 GNUNET_CONTAINER_DLL_insert(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
1659 return send_check_connections (plugin, ps);
1665 * Function that can be used to force the plugin to disconnect
1666 * from the given peer and cancel all previous transmissions
1667 * (and their continuationc).
1669 * @param cls closure
1670 * @param target peer from which to disconnect
1673 http_plugin_disconnect (void *cls,
1674 const struct GNUNET_PeerIdentity *target)
1677 struct Plugin *plugin = cls;
1678 struct HTTP_PeerContext *pc = NULL;
1679 struct Session *ps = NULL;
1681 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1689 if (ps->direction==OUTBOUND)
1691 if (ps->send_endpoint!=NULL)
1693 curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1694 curl_easy_cleanup(ps->send_endpoint);
1695 ps->send_endpoint=NULL;
1696 ps->send_force_disconnect = GNUNET_YES;
1698 if (ps->recv_endpoint!=NULL)
1700 curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1701 curl_easy_cleanup(ps->recv_endpoint);
1702 ps->recv_endpoint=NULL;
1703 ps->recv_force_disconnect = GNUNET_YES;
1706 if (ps->direction==INBOUND)
1708 ps->recv_force_disconnect = GNUNET_YES;
1709 ps->send_force_disconnect = GNUNET_YES;
1711 while (ps->pending_msgs_head!=NULL)
1713 remove_http_message(ps, ps->pending_msgs_head);
1715 ps->recv_active = GNUNET_NO;
1716 ps->send_active = GNUNET_NO;
1719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"All connections to peer `%s' terminated\n", GNUNET_i2s(target));
1724 * Convert the transports address to a nice, human-readable
1727 * @param cls closure
1728 * @param type name of the transport that generated the address
1729 * @param addr one of the addresses of the host, NULL for the last address
1730 * the specific address format depends on the transport
1731 * @param addrlen length of the address
1732 * @param numeric should (IP) addresses be displayed in numeric form?
1733 * @param timeout after how long should we give up?
1734 * @param asc function to call on each string
1735 * @param asc_cls closure for asc
1738 http_plugin_address_pretty_printer (void *cls,
1743 struct GNUNET_TIME_Relative timeout,
1744 GNUNET_TRANSPORT_AddressStringCallback
1747 const struct IPv4HttpAddress *t4;
1748 const struct IPv6HttpAddress *t6;
1749 struct sockaddr_in a4;
1750 struct sockaddr_in6 a6;
1756 GNUNET_assert(cls !=NULL);
1757 if (addrlen == sizeof (struct IPv6HttpAddress))
1759 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1761 a6.sin6_addr = t6->ipv6_addr;
1762 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1763 port = ntohs(t6->u6_port);
1765 else if (addrlen == sizeof (struct IPv4HttpAddress))
1767 address = GNUNET_malloc (INET_ADDRSTRLEN);
1769 a4.sin_addr.s_addr = t4->ipv4_addr;
1770 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1771 port = ntohs(t4->u_port);
1775 /* invalid address */
1776 GNUNET_break_op (0);
1777 asc (asc_cls, NULL);
1780 res = GNUNET_asprintf(&ret,"http://%s:%u/",address,port);
1781 GNUNET_free (address);
1782 GNUNET_assert(res != 0);
1790 * Another peer has suggested an address for this
1791 * peer and transport plugin. Check that this could be a valid
1792 * address. If so, consider adding it to the list
1795 * @param cls closure
1796 * @param addr pointer to the address
1797 * @param addrlen length of addr
1798 * @return GNUNET_OK if this is a plausible address for this peer
1802 http_plugin_address_suggested (void *cls,
1803 const void *addr, size_t addrlen)
1805 struct Plugin *plugin = cls;
1806 struct IPv4HttpAddress *v4;
1807 struct IPv6HttpAddress *v6;
1810 GNUNET_assert(cls !=NULL);
1811 if ((addrlen != sizeof (struct IPv4HttpAddress)) &&
1812 (addrlen != sizeof (struct IPv6HttpAddress)))
1814 return GNUNET_SYSERR;
1816 if (addrlen == sizeof (struct IPv4HttpAddress))
1818 v4 = (struct IPv4HttpAddress *) addr;
1819 if (INADDR_LOOPBACK == ntohl(v4->ipv4_addr))
1821 return GNUNET_SYSERR;
1823 port = ntohs (v4->u_port);
1824 if (port != plugin->port_inbound)
1826 return GNUNET_SYSERR;
1831 v6 = (struct IPv6HttpAddress *) addr;
1832 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1834 return GNUNET_SYSERR;
1836 port = ntohs (v6->u6_port);
1837 if (port != plugin->port_inbound)
1839 return GNUNET_SYSERR;
1847 * Function called for a quick conversion of the binary address to
1848 * a numeric address. Note that the caller must not free the
1849 * address and that the next call to this function is allowed
1850 * to override the address again.
1852 * @param cls closure
1853 * @param addr binary address
1854 * @param addrlen length of the address
1855 * @return string representing the same address
1858 http_plugin_address_to_string (void *cls,
1862 const struct IPv4HttpAddress *t4;
1863 const struct IPv6HttpAddress *t6;
1864 struct sockaddr_in a4;
1865 struct sockaddr_in6 a6;
1871 if (addrlen == sizeof (struct IPv6HttpAddress))
1873 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1875 a6.sin6_addr = t6->ipv6_addr;
1876 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1877 port = ntohs(t6->u6_port);
1879 else if (addrlen == sizeof (struct IPv4HttpAddress))
1881 address = GNUNET_malloc (INET_ADDRSTRLEN);
1883 a4.sin_addr.s_addr = t4->ipv4_addr;
1884 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1885 port = ntohs(t4->u_port);
1889 /* invalid address */
1892 res = GNUNET_asprintf(&ret,"%s:%u",address,port);
1893 GNUNET_free (address);
1894 GNUNET_assert(res != 0);
1899 * Add the IP of our network interface to the list of
1900 * our external IP addresses.
1902 * @param cls the 'struct Plugin*'
1903 * @param name name of the interface
1904 * @param isDefault do we think this may be our default interface
1905 * @param addr address of the interface
1906 * @param addrlen number of bytes in addr
1907 * @return GNUNET_OK to continue iterating
1910 process_interfaces (void *cls,
1913 const struct sockaddr *addr, socklen_t addrlen)
1915 struct Plugin *plugin = cls;
1916 struct IPv4HttpAddress * t4;
1917 struct IPv6HttpAddress * t6;
1920 GNUNET_assert(cls !=NULL);
1921 af = addr->sa_family;
1924 t4 = GNUNET_malloc(sizeof(struct IPv4HttpAddress));
1925 if (INADDR_LOOPBACK == ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr))
1927 /* skip loopback addresses */
1930 t4->ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1931 t4->u_port = htons (plugin->port_inbound);
1932 plugin->env->notify_address(plugin->env->cls,"http",t4, sizeof (struct IPv4HttpAddress), GNUNET_TIME_UNIT_FOREVER_REL);
1935 else if (af == AF_INET6)
1937 t6 = GNUNET_malloc(sizeof(struct IPv6HttpAddress));
1938 if (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr))
1940 /* skip link local addresses */
1943 if (IN6_IS_ADDR_LOOPBACK (&((struct sockaddr_in6 *) addr)->sin6_addr))
1945 /* skip loopback addresses */
1948 memcpy (&t6->ipv6_addr,
1949 &((struct sockaddr_in6 *) addr)->sin6_addr,
1950 sizeof (struct in6_addr));
1951 t6->u6_port = htons (plugin->port_inbound);
1952 plugin->env->notify_address(plugin->env->cls,"http",t6,sizeof (struct IPv6HttpAddress) , GNUNET_TIME_UNIT_FOREVER_REL);
1957 int peer_context_Iterator (void *cls, const GNUNET_HashCode *key, void *value)
1959 struct HTTP_PeerContext * pc = value;
1960 struct Session * ps = pc->head;
1961 struct Session * tmp = NULL;
1962 struct HTTP_Message * msg = NULL;
1963 struct HTTP_Message * msg_tmp = NULL;
1965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing context for peer `%s'\n",GNUNET_i2s(&pc->identity));
1971 GNUNET_free(ps->addr);
1972 GNUNET_free(ps->url);
1973 if (ps->msgtok != NULL)
1974 GNUNET_SERVER_mst_destroy (ps->msgtok);
1976 msg = ps->pending_msgs_head;
1979 msg_tmp = msg->next;
1983 if (ps->direction==OUTBOUND)
1985 if (ps->send_endpoint!=NULL)
1986 curl_easy_cleanup(ps->send_endpoint);
1987 if (ps->recv_endpoint!=NULL)
1988 curl_easy_cleanup(ps->recv_endpoint);
2000 * Exit point from the plugin.
2003 libgnunet_plugin_transport_http_done (void *cls)
2005 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
2006 struct Plugin *plugin = api->cls;
2009 GNUNET_assert(cls !=NULL);
2011 if ( plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2013 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
2014 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
2017 if ( plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2019 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
2020 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2023 if ( plugin->http_server_task_send != GNUNET_SCHEDULER_NO_TASK)
2025 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_send);
2026 plugin->http_server_task_send = GNUNET_SCHEDULER_NO_TASK;
2029 if (plugin->http_server_daemon_v4 != NULL)
2031 MHD_stop_daemon (plugin->http_server_daemon_v4);
2032 plugin->http_server_daemon_v4 = NULL;
2034 if (plugin->http_server_daemon_v6 != NULL)
2036 MHD_stop_daemon (plugin->http_server_daemon_v6);
2037 plugin->http_server_daemon_v6 = NULL;
2040 /* free all peer information */
2041 GNUNET_CONTAINER_multihashmap_iterate (plugin->peers,
2042 &peer_context_Iterator,
2044 GNUNET_CONTAINER_multihashmap_destroy (plugin->peers);
2046 mret = curl_multi_cleanup(plugin->multi_handle);
2047 if ( CURLM_OK != mret)
2048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed");
2050 GNUNET_free (plugin);
2052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unload http plugin complete...\n");
2058 * Entry point for the plugin.
2061 libgnunet_plugin_transport_http_init (void *cls)
2063 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2064 struct Plugin *plugin;
2065 struct GNUNET_TRANSPORT_PluginFunctions *api;
2066 struct GNUNET_TIME_Relative gn_timeout;
2067 long long unsigned int port;
2069 GNUNET_assert(cls !=NULL);
2070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
2072 plugin = GNUNET_malloc (sizeof (struct Plugin));
2074 plugin->peers = NULL;
2076 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2078 api->send = &http_plugin_send;
2079 api->disconnect = &http_plugin_disconnect;
2080 api->address_pretty_printer = &http_plugin_address_pretty_printer;
2081 api->check_address = &http_plugin_address_suggested;
2082 api->address_to_string = &http_plugin_address_to_string;
2084 /* Hashing our identity to use it in URLs */
2085 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &plugin->my_ascii_hash_ident);
2087 /* Reading port number from config file */
2089 GNUNET_CONFIGURATION_get_value_number (env->cfg,
2095 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2098 ("Require valid port number for transport plugin `%s' in configuration!\n"),
2100 libgnunet_plugin_transport_http_done (api);
2103 GNUNET_assert ((port > 0) && (port <= 65535));
2104 plugin->port_inbound = port;
2105 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
2106 if ((plugin->http_server_daemon_v4 == NULL) && (plugin->http_server_daemon_v6 == NULL) && (port != 0))
2108 plugin->http_server_daemon_v6 = MHD_start_daemon (MHD_USE_IPv6,
2110 &acceptPolicyCallback,
2111 plugin , &accessHandlerCallback, plugin,
2112 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
2113 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
2114 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
2115 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2116 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
2118 plugin->http_server_daemon_v4 = MHD_start_daemon (MHD_NO_FLAG,
2120 &acceptPolicyCallback,
2121 plugin , &accessHandlerCallback, plugin,
2122 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
2123 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
2124 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
2125 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2126 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
2129 if (plugin->http_server_daemon_v4 != NULL)
2130 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
2131 if (plugin->http_server_daemon_v6 != NULL)
2132 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
2134 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2135 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
2136 else if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
2140 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No MHD was started, transport plugin not functional!\n");
2141 libgnunet_plugin_transport_http_done (api);
2145 /* Initializing cURL */
2146 curl_global_init(CURL_GLOBAL_ALL);
2147 plugin->multi_handle = curl_multi_init();
2149 if ( NULL == plugin->multi_handle )
2151 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2153 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
2155 libgnunet_plugin_transport_http_done (api);
2159 plugin->peers = GNUNET_CONTAINER_multihashmap_create (10);
2160 GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
2165 /* end of plugin_transport_http.c */