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>
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_curl_task;
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;
403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: removing %s session with id %u\n", ps, (ps->direction == INBOUND) ? "inbound" : "outbound",ps->session_id);
404 GNUNET_free_non_null (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);
417 msg = ps->pending_msgs_head;
420 GNUNET_CONTAINER_DLL_remove(pc->head,pc->tail,ps);
426 static struct Session * get_Session (void * cls, struct HTTP_PeerContext *pc, const void * addr, size_t addr_len)
428 struct Session * cc = pc->head;
429 struct Session * con = NULL;
430 unsigned int count = 0;
432 GNUNET_assert((addr_len == sizeof (struct IPv4HttpAddress)) || (addr_len == sizeof (struct IPv6HttpAddress)));
435 if (addr_len == cc->addrlen)
437 if (0 == memcmp(cc->addr, addr, addr_len))
439 /* connection can not be used, since it is disconnected */
440 if ((cc->recv_force_disconnect==GNUNET_NO) && (cc->send_force_disconnect==GNUNET_NO))
453 * Callback called by MHD when a connection is terminated
455 static void mhd_termination_cb (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
457 struct Session * ps = *httpSessionCache;
460 struct HTTP_PeerContext * pc = ps->peercontext;
462 if (connection==ps->recv_endpoint)
464 #if DEBUG_CONNECTIONS
465 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
467 ps->recv_active = GNUNET_NO;
468 ps->recv_connected = GNUNET_NO;
469 ps->recv_endpoint = NULL;
471 if (connection==ps->send_endpoint)
474 ps->send_active = GNUNET_NO;
475 ps->send_connected = GNUNET_NO;
476 ps->send_endpoint = NULL;
477 #if DEBUG_CONNECTIONS
478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
482 /* if both connections disconnected, remove session */
483 if ((ps->send_connected == GNUNET_NO) && (ps->recv_connected == GNUNET_NO))
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 "Connection %X: Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
502 ntohs(message->type),
503 ntohs(message->size),
504 GNUNET_i2s(&(ps->peercontext)->identity),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
506 pc->plugin->env->receive (ps->peercontext->plugin->env->cls,
513 static void curl_receive_mst_cb (void *cls,
515 const struct GNUNET_MessageHeader *message)
517 struct Session *ps = cls;
518 struct HTTP_PeerContext *pc = ps->peercontext;
519 GNUNET_assert(ps != NULL);
520 GNUNET_assert(pc != NULL);
522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
523 "Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
524 ntohs(message->type),
525 ntohs(message->size),
526 GNUNET_i2s(&(pc->identity)),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
528 pc->plugin->env->receive (pc->plugin->env->cls,
537 * Check if ip is allowed to connect.
540 mhd_accept_cb (void *cls,
541 const struct sockaddr *addr, socklen_t addr_len)
544 struct Plugin *plugin = cls;
546 /* Every connection is accepted, nothing more to do here */
550 int mhd_send_callback (void *cls, uint64_t pos, char *buf, int max)
554 struct Session * ps = cls;
555 struct HTTP_PeerContext * pc;
556 struct HTTP_Message * msg;
559 GNUNET_assert (ps!=NULL);
560 pc = ps->peercontext;
561 msg = ps->pending_msgs_tail;
562 if (ps->send_force_disconnect==GNUNET_YES)
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[msg->pos],(msg->size-msg->pos));
575 bytes_read = msg->size-msg->pos;
576 msg->pos+=(msg->size-msg->pos);
580 memcpy(buf,&msg->buf[msg->pos],max);
585 if (msg->pos==msg->size)
587 if (NULL!=msg->transmit_cont)
588 msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
589 res = remove_http_message(ps,msg);
596 * Process GET or PUT request received via MHD. For
597 * GET, queue response that will send back our pending
598 * messages. For PUT, process incoming data and send
599 * to GNUnet core. In either case, check if a session
600 * already exists and create a new one if not.
603 mdh_access_cb (void *cls,
604 struct MHD_Connection *mhd_connection,
608 const char *upload_data,
609 size_t * upload_data_size, void **httpSessionCache)
611 struct Plugin *plugin = cls;
612 struct MHD_Response *response;
613 const union MHD_ConnectionInfo * conn_info;
615 struct sockaddr_in *addrin;
616 struct sockaddr_in6 *addrin6;
618 char address[INET6_ADDRSTRLEN+14];
619 struct GNUNET_PeerIdentity pi_in;
622 struct IPv4HttpAddress ipv4addr;
623 struct IPv6HttpAddress ipv6addr;
625 struct HTTP_PeerContext *pc;
627 struct Session *ps_tmp;
630 int send_error_to_client;
634 GNUNET_assert(cls !=NULL);
635 send_error_to_client = GNUNET_NO;
637 if (NULL == *httpSessionCache)
639 /* check url for peer identity , if invalid send HTTP 404*/
640 size_t len = strlen(&url[1]);
641 char * peer = GNUNET_malloc(104+1);
643 if ((len>104) && (url[104]==';'))
645 char * id = GNUNET_malloc((len-104)+1);
646 strcpy(id,&url[105]);
647 memcpy(peer,&url[1],103);
649 id_num = strtoul ( id, NULL , 10);
652 res = GNUNET_CRYPTO_hash_from_string (peer, &(pi_in.hashPubKey));
654 if ( GNUNET_SYSERR == res )
656 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
657 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
658 MHD_destroy_response (response);
660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, sent HTTP 1.1/404\n");
662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, could not send error\n");
668 ps = *httpSessionCache;
669 pc = ps->peercontext;
672 if (NULL == *httpSessionCache)
674 /* get peer context */
675 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &pi_in.hashPubKey);
679 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
681 pc->session_id_counter=1;
682 memcpy(&pc->identity, &pi_in, sizeof(struct GNUNET_PeerIdentity));
683 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
686 conn_info = MHD_get_connection_info(mhd_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
687 /* Incoming IPv4 connection */
688 if ( AF_INET == conn_info->client_addr->sin_family)
690 addrin = conn_info->client_addr;
691 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
692 memcpy(&ipv4addr.ipv4_addr,&(addrin->sin_addr),sizeof(struct in_addr));
693 ipv4addr.u_port = addrin->sin_port;
695 addr_len = sizeof(struct IPv4HttpAddress);
697 /* Incoming IPv6 connection */
698 if ( AF_INET6 == conn_info->client_addr->sin_family)
700 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
701 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
702 memcpy(&ipv6addr.ipv6_addr,&(addrin6->sin6_addr),sizeof(struct in6_addr));
703 ipv6addr.u6_port = addrin6->sin6_port;
705 addr_len = sizeof(struct IPv6HttpAddress);
709 //ps = get_Session(plugin, pc, addr, addr_len);
711 /* only inbound sessions here */
716 if ((ps_tmp->direction==INBOUND) && (ps_tmp->session_id == id_num) && (id_num!=0))
718 if ((ps_tmp->recv_force_disconnect!=GNUNET_YES) && (ps_tmp->send_force_disconnect!=GNUNET_YES))
727 ps = GNUNET_malloc(sizeof (struct Session));
728 ps->addr = GNUNET_malloc(addr_len);
729 memcpy(ps->addr,addr,addr_len);
730 ps->addrlen = addr_len;
731 ps->direction=INBOUND;
732 ps->pending_msgs_head = NULL;
733 ps->pending_msgs_tail = NULL;
734 ps->send_connected=GNUNET_NO;
735 ps->send_active=GNUNET_NO;
736 ps->recv_connected=GNUNET_NO;
737 ps->recv_active=GNUNET_NO;
739 ps->session_id =id_num;
740 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
741 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
744 *httpSessionCache = ps;
745 if (ps->msgtok==NULL)
746 ps->msgtok = GNUNET_SERVER_mst_create (&mhd_write_mst_cb, ps);
748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: HTTP Daemon has new an incoming `%s' request from peer `%s' (`%s')\n",
751 GNUNET_i2s(&pc->identity),
752 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen));
755 /* Is it a PUT or a GET request */
756 if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
758 if (ps->recv_force_disconnect)
760 #if DEBUG_CONNECTIONS
761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection was forced to disconnect\n",ps);
763 ps->recv_active = GNUNET_NO;
766 if ((*upload_data_size == 0) && (ps->recv_active==GNUNET_NO))
768 ps->recv_endpoint = mhd_connection;
769 ps->recv_connected = GNUNET_YES;
770 ps->recv_active = GNUNET_YES;
771 #if DEBUG_CONNECTIONS
772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound PUT connection connected\n",ps);
777 /* Transmission of all data complete */
778 if ((*upload_data_size == 0) && (ps->recv_active == GNUNET_YES))
780 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
781 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
782 #if DEBUG_CONNECTIONS
783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Sent HTTP/1.1: 200 OK as PUT Response\n",ps);
785 MHD_destroy_response (response);
786 ps->recv_active=GNUNET_NO;
791 if ((*upload_data_size > 0) && (ps->recv_active == GNUNET_YES))
793 res = GNUNET_SERVER_mst_receive(ps->msgtok, ps, upload_data,*upload_data_size, GNUNET_NO, GNUNET_NO);
794 (*upload_data_size) = 0;
800 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
802 if (ps->send_force_disconnect)
804 #if DEBUG_CONNECTIONS
805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection was forced to disconnect\n",ps);
807 ps->send_active = GNUNET_NO;
810 ps->send_connected = GNUNET_YES;
811 ps->send_active = GNUNET_YES;
812 ps->send_endpoint = mhd_connection;
813 #if DEBUG_CONNECTIONS
814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound GET connection connected\n",ps);
816 response = MHD_create_response_from_callback(-1,32 * 1024, &mhd_send_callback, ps, NULL);
817 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
818 MHD_destroy_response (response);
826 * Call MHD to process pending ipv4 requests and then go back
827 * and schedule the next run.
829 static void http_server_daemon_v4_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
831 * Call MHD to process pending ipv6 requests and then go back
832 * and schedule the next run.
834 static void http_server_daemon_v6_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
837 * Function that queries MHD's select sets and
838 * starts the task waiting for them.
840 static GNUNET_SCHEDULER_TaskIdentifier
841 http_server_daemon_prepare (void * cls, struct MHD_Daemon *daemon_handle)
843 struct Plugin *plugin = cls;
844 GNUNET_SCHEDULER_TaskIdentifier ret;
848 struct GNUNET_NETWORK_FDSet *wrs;
849 struct GNUNET_NETWORK_FDSet *wws;
850 struct GNUNET_NETWORK_FDSet *wes;
852 unsigned long long timeout;
854 struct GNUNET_TIME_Relative tv;
856 GNUNET_assert(cls !=NULL);
857 ret = GNUNET_SCHEDULER_NO_TASK;
861 wrs = GNUNET_NETWORK_fdset_create ();
862 wes = GNUNET_NETWORK_fdset_create ();
863 wws = GNUNET_NETWORK_fdset_create ();
865 GNUNET_assert (MHD_YES ==
866 MHD_get_fdset (daemon_handle,
871 haveto = MHD_get_timeout (daemon_handle, &timeout);
872 if (haveto == MHD_YES)
873 tv.value = (uint64_t) timeout;
875 tv = GNUNET_TIME_UNIT_FOREVER_REL;
876 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
877 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
878 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
879 if (daemon_handle == plugin->http_server_daemon_v4)
881 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
882 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
883 GNUNET_SCHEDULER_NO_TASK,
887 &http_server_daemon_v4_run,
890 if (daemon_handle == plugin->http_server_daemon_v6)
892 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
893 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
894 GNUNET_SCHEDULER_NO_TASK,
898 &http_server_daemon_v6_run,
901 GNUNET_NETWORK_fdset_destroy (wrs);
902 GNUNET_NETWORK_fdset_destroy (wws);
903 GNUNET_NETWORK_fdset_destroy (wes);
908 * Call MHD to process pending requests and then go back
909 * and schedule the next run.
911 static void http_server_daemon_v4_run (void *cls,
912 const struct GNUNET_SCHEDULER_TaskContext *tc)
914 struct Plugin *plugin = cls;
916 GNUNET_assert(cls !=NULL);
917 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
918 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
920 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
923 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v4));
924 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
930 * Call MHD to process pending requests and then go back
931 * and schedule the next run.
933 static void http_server_daemon_v6_run (void *cls,
934 const struct GNUNET_SCHEDULER_TaskContext *tc)
936 struct Plugin *plugin = cls;
938 GNUNET_assert(cls !=NULL);
939 if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
940 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
942 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
945 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v6));
946 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
951 * Function setting up curl handle and selecting message to send
953 * @param ses session to send data to
954 * @param con connection
955 * @return bytes sent to peer
957 static ssize_t send_check_connections (void *cls, struct Session *ps);
959 static size_t curl_get_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
961 struct Session * ps = stream;
964 size_t len = size * nmemb;
965 long http_result = 0;
967 /* Getting last http result code */
968 if (ps->recv_connected==GNUNET_NO)
970 GNUNET_assert(NULL!=ps);
971 res = curl_easy_getinfo(ps->recv_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
974 if (http_result == 200)
976 ps->recv_connected = GNUNET_YES;
977 ps->recv_active = GNUNET_YES;
978 #if DEBUG_CONNECTIONS
979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to recieve data\n",ps);
981 // Calling send_check_connections again since receive is established
982 send_check_connections (ps->peercontext->plugin, ps);
988 if ((size * nmemb) < SIZE_MAX)
989 tmp = GNUNET_malloc (len+1);
991 if ((tmp != NULL) && (len > 0))
996 if (tmp[len-2] == 13)
1000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
1006 return size * nmemb;
1009 static size_t curl_put_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
1011 struct Session * ps = stream;
1014 size_t len = size * nmemb;
1015 long http_result = 0;
1018 /* Getting last http result code */
1019 GNUNET_assert(NULL!=ps);
1020 res = curl_easy_getinfo(ps->send_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
1021 if (CURLE_OK == res)
1023 if ((http_result == 100) && (ps->send_connected==GNUNET_NO))
1025 ps->send_connected = GNUNET_YES;
1026 ps->send_active = GNUNET_YES;
1027 #if DEBUG_CONNECTIONS
1028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to send data\n",ps);
1031 if ((http_result == 200) && (ps->send_connected==GNUNET_YES))
1033 ps->send_connected = GNUNET_NO;
1034 ps->send_active = GNUNET_NO;
1035 #if DEBUG_CONNECTIONS
1036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: sending disconnected\n",ps);
1042 if ((size * nmemb) < SIZE_MAX)
1043 tmp = GNUNET_malloc (len+1);
1045 if ((tmp != NULL) && (len > 0))
1047 memcpy(tmp,ptr,len);
1050 if (tmp[len-2] == 13)
1054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
1060 return size * nmemb;
1064 * Callback method used with libcurl
1065 * Method is called when libcurl needs to read data during sending
1066 * @param stream pointer where to write data
1067 * @param size size of an individual element
1068 * @param nmemb count of elements that can be written to the buffer
1069 * @param ptr source pointer, passed to the libcurl handle
1070 * @return bytes written to stream
1072 static size_t curl_send_cb(void *stream, size_t size, size_t nmemb, void *ptr)
1074 struct Session * ps = ptr;
1075 struct HTTP_Message * msg = ps->pending_msgs_tail;
1079 if ((ps->pending_msgs_tail == NULL) && (ps->send_active == GNUNET_YES))
1081 #if DEBUG_CONNECTIONS
1082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: No Message to send, pausing connection\n",ps);
1084 ps->send_active = GNUNET_NO;
1085 return CURL_READFUNC_PAUSE;
1088 msg = ps->pending_msgs_tail;
1090 if (msg->pos < msg->size)
1092 /* data fit in buffer */
1093 if ((msg->size - msg->pos) <= (size * nmemb))
1095 len = (msg->size - msg->pos);
1096 memcpy(stream, &msg->buf[msg->pos], len);
1103 memcpy(stream, &msg->buf[msg->pos], len);
1108 /* no data to send */
1114 if ( msg->pos == msg->size)
1116 #if DEBUG_CONNECTIONS
1117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Message with %u bytes sent, removing message from queue \n",ps, msg->pos);
1119 /* Calling transmit continuation */
1120 if (( NULL != ps->pending_msgs_tail) && (NULL != ps->pending_msgs_tail->transmit_cont))
1121 msg->transmit_cont (ps->pending_msgs_tail->transmit_cont_cls,&(ps->peercontext)->identity,GNUNET_OK);
1122 remove_http_message(ps, msg);
1128 * Callback method used with libcurl
1129 * Method is called when libcurl needs to write data during sending
1130 * @param stream pointer where to write data
1131 * @param size size of an individual element
1132 * @param nmemb count of elements that can be written to the buffer
1133 * @param ptr destination pointer, passed to the libcurl handle
1134 * @return bytes read from stream
1136 static size_t curl_receive_cb( void *stream, size_t size, size_t nmemb, void *ptr)
1138 struct Session * ps = ptr;
1139 #if DEBUG_CONNECTIONS
1140 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: %u bytes received\n",ps, size*nmemb);
1142 GNUNET_SERVER_mst_receive(ps->msgtok, ps, stream, size*nmemb, GNUNET_NO, GNUNET_NO);
1143 return (size * nmemb);
1148 * Function setting up file descriptors and scheduling task to run
1149 * @param cls closure
1150 * @param ses session to send data to
1153 static int curl_schedule(void *cls, struct Session* ses );
1158 * Function setting up curl handle and selecting message to send
1160 * @param ses session to send data to
1161 * @param con connection
1162 * @return GNUNET_SYSERR on failure, GNUNET_NO if connecting, GNUNET_YES if ok
1164 static ssize_t send_check_connections (void *cls, struct Session *ps)
1166 struct Plugin *plugin = cls;
1168 struct HTTP_Message * msg;
1169 struct GNUNET_TIME_Relative timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1171 GNUNET_assert(cls !=NULL);
1173 if (ps->direction == OUTBOUND)
1175 /* RECV DIRECTION */
1176 /* Check if session is connected to receive data, otherwise connect to peer */
1177 if (ps->recv_connected == GNUNET_NO)
1179 if (ps->recv_endpoint == NULL)
1181 ps->recv_endpoint = curl_easy_init();
1183 curl_easy_setopt(ps->recv_endpoint, CURLOPT_VERBOSE, 1L);
1185 curl_easy_setopt(ps->recv_endpoint, CURLOPT_URL, ps->url);
1186 curl_easy_setopt(ps->recv_endpoint, CURLOPT_HEADERFUNCTION, &curl_get_header_function);
1187 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEHEADER, ps);
1188 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READFUNCTION, curl_send_cb);
1189 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READDATA, ps);
1190 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEFUNCTION, curl_receive_cb);
1191 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEDATA, ps);
1192 curl_easy_setopt(ps->recv_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1193 curl_easy_setopt(ps->recv_endpoint, CURLOPT_PRIVATE, ps);
1194 curl_easy_setopt(ps->recv_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1195 curl_easy_setopt(ps->recv_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1197 mret = curl_multi_add_handle(plugin->multi_handle, ps->recv_endpoint);
1198 if (mret != CURLM_OK)
1200 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1201 _("%s failed at %s:%d: `%s'\n"),
1202 "curl_multi_add_handle", __FILE__, __LINE__,
1203 curl_multi_strerror (mret));
1204 return GNUNET_SYSERR;
1206 if (curl_schedule (plugin, NULL) == GNUNET_SYSERR)
1207 return GNUNET_SYSERR;
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 if (CURLE_OK == curl_easy_pause(ps->send_endpoint,CURLPAUSE_CONT))
1236 ps->send_active=GNUNET_YES;
1240 return GNUNET_SYSERR;
1243 /* not connected, initiate connection */
1244 if ((ps->send_connected==GNUNET_NO) && (NULL == ps->send_endpoint))
1245 ps->send_endpoint = curl_easy_init();
1246 GNUNET_assert (ps->send_endpoint != NULL);
1247 GNUNET_assert (NULL != ps->pending_msgs_tail);
1248 #if DEBUG_CONNECTIONS
1249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound not connected, initiating connection\n",ps);
1251 ps->send_active = GNUNET_NO;
1252 msg = ps->pending_msgs_tail;
1255 curl_easy_setopt(ps->send_endpoint, CURLOPT_VERBOSE, 1L);
1257 curl_easy_setopt(ps->send_endpoint, CURLOPT_URL, ps->url);
1258 curl_easy_setopt(ps->send_endpoint, CURLOPT_PUT, 1L);
1259 curl_easy_setopt(ps->send_endpoint, CURLOPT_HEADERFUNCTION, &curl_put_header_function);
1260 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEHEADER, ps);
1261 curl_easy_setopt(ps->send_endpoint, CURLOPT_READFUNCTION, curl_send_cb);
1262 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1263 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEFUNCTION, curl_receive_cb);
1264 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1265 curl_easy_setopt(ps->send_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1266 curl_easy_setopt(ps->send_endpoint, CURLOPT_PRIVATE, ps);
1267 curl_easy_setopt(ps->send_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1268 curl_easy_setopt(ps->send_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1270 mret = curl_multi_add_handle(plugin->multi_handle, ps->send_endpoint);
1271 if (mret != CURLM_OK)
1273 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1274 _("%s failed at %s:%d: `%s'\n"),
1275 "curl_multi_add_handle", __FILE__, __LINE__,
1276 curl_multi_strerror (mret));
1277 return GNUNET_SYSERR;
1279 if (curl_schedule (plugin, NULL) == GNUNET_SYSERR)
1280 return GNUNET_SYSERR;
1283 if (ps->direction == INBOUND)
1285 GNUNET_assert (NULL != ps->pending_msgs_tail);
1286 msg = ps->pending_msgs_tail;
1287 if ((ps->recv_connected==GNUNET_YES) && (ps->send_connected==GNUNET_YES))
1290 return GNUNET_SYSERR;
1293 static void curl_perform (void *cls,
1294 const struct GNUNET_SCHEDULER_TaskContext *tc)
1296 struct Plugin *plugin = cls;
1297 static unsigned int handles_last_run;
1299 struct CURLMsg *msg;
1301 struct Session *ps = NULL;
1302 struct HTTP_PeerContext *pc = NULL;
1303 struct HTTP_Message * cur_msg = NULL;
1306 GNUNET_assert(cls !=NULL);
1308 plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
1309 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1315 mret = curl_multi_perform (plugin->multi_handle, &running);
1316 if ((running < handles_last_run) && (running>0))
1321 msg = curl_multi_info_read (plugin->multi_handle, &running);
1324 /* get session for affected curl handle */
1325 GNUNET_assert ( msg->easy_handle != NULL );
1326 curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, (char *) &ps);
1327 GNUNET_assert ( ps != NULL );
1328 pc = ps->peercontext;
1329 GNUNET_assert ( pc != NULL );
1334 if ( (msg->data.result != CURLE_OK) &&
1335 (msg->data.result != CURLE_GOT_NOTHING) )
1337 /* sending msg failed*/
1338 if (msg->easy_handle == ps->send_endpoint)
1340 #if DEBUG_CONNECTIONS
1341 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1342 _("Connection %X: HTTP PUT to peer `%s' (`%s') failed: `%s' `%s'\n"),
1344 GNUNET_i2s(&pc->identity),
1345 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1346 "curl_multi_perform",
1347 curl_easy_strerror (msg->data.result));
1349 ps->send_connected = GNUNET_NO;
1350 ps->send_active = GNUNET_NO;
1351 curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1352 curl_easy_cleanup(ps->send_endpoint);
1353 ps->send_endpoint=NULL;
1354 cur_msg = ps->pending_msgs_tail;
1355 if (( NULL != cur_msg) && ( NULL != cur_msg->transmit_cont))
1356 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1358 /* GET connection failed */
1359 if (msg->easy_handle == ps->recv_endpoint)
1361 #if DEBUG_CONNECTIONS
1362 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1363 _("Connection %X: HTTP GET to peer `%s' (`%s') failed: `%s' `%s'\n"),
1365 GNUNET_i2s(&pc->identity),
1366 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1367 "curl_multi_perform",
1368 curl_easy_strerror (msg->data.result));
1370 ps->recv_connected = GNUNET_NO;
1371 ps->recv_active = GNUNET_NO;
1372 curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1373 curl_easy_cleanup(ps->recv_endpoint);
1374 ps->recv_endpoint=NULL;
1379 if (msg->easy_handle == ps->send_endpoint)
1381 GNUNET_assert (CURLE_OK == curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &http_result));
1382 #if DEBUG_CONNECTIONS
1383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1384 "Connection %X: HTTP PUT connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1386 GNUNET_i2s(&pc->identity),
1387 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1390 /* Calling transmit continuation */
1391 cur_msg = ps->pending_msgs_tail;
1392 if (( NULL != cur_msg) && (NULL != cur_msg->transmit_cont))
1394 /* HTTP 1xx : Last message before here was informational */
1395 if ((http_result >=100) && (http_result < 200))
1396 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1397 /* HTTP 2xx: successful operations */
1398 if ((http_result >=200) && (http_result < 300))
1399 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1400 /* HTTP 3xx..5xx: error */
1401 if ((http_result >=300) && (http_result < 600))
1402 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1404 ps->send_connected = GNUNET_NO;
1405 ps->send_active = GNUNET_NO;
1406 curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1407 curl_easy_cleanup(ps->send_endpoint);
1408 ps->send_endpoint =NULL;
1410 if (msg->easy_handle == ps->recv_endpoint)
1412 #if DEBUG_CONNECTIONS
1413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1414 "Connection %X: HTTP GET 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 ps->recv_connected = GNUNET_NO;
1421 ps->recv_active = GNUNET_NO;
1422 curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1423 curl_easy_cleanup(ps->recv_endpoint);
1424 ps->recv_endpoint=NULL;
1427 if ((ps->recv_connected == GNUNET_NO) && (ps->send_connected == GNUNET_NO))
1428 remove_session (pc, ps, GNUNET_YES, GNUNET_SYSERR);
1435 while ( (running > 0) );
1437 handles_last_run = running;
1439 while (mret == CURLM_CALL_MULTI_PERFORM);
1440 curl_schedule(plugin, cls);
1445 * Function setting up file descriptors and scheduling task to run
1446 * @param ses session to send data to
1447 * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
1449 static int curl_schedule(void *cls, struct Session* ses )
1451 struct Plugin *plugin = cls;
1456 struct GNUNET_NETWORK_FDSet *grs;
1457 struct GNUNET_NETWORK_FDSet *gws;
1461 GNUNET_assert(cls !=NULL);
1466 mret = curl_multi_fdset (plugin->multi_handle, &rs, &ws, &es, &max);
1467 if (mret != CURLM_OK)
1469 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1470 _("%s failed at %s:%d: `%s'\n"),
1471 "curl_multi_fdset", __FILE__, __LINE__,
1472 curl_multi_strerror (mret));
1473 return GNUNET_SYSERR;
1475 mret = curl_multi_timeout (plugin->multi_handle, &to);
1476 if (mret != CURLM_OK)
1478 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1479 _("%s failed at %s:%d: `%s'\n"),
1480 "curl_multi_timeout", __FILE__, __LINE__,
1481 curl_multi_strerror (mret));
1482 return GNUNET_SYSERR;
1485 grs = GNUNET_NETWORK_fdset_create ();
1486 gws = GNUNET_NETWORK_fdset_create ();
1487 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1488 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1489 plugin->http_curl_task = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1490 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1491 GNUNET_SCHEDULER_NO_TASK,
1492 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
1497 GNUNET_NETWORK_fdset_destroy (gws);
1498 GNUNET_NETWORK_fdset_destroy (grs);
1504 * Function that can be used by the transport service to transmit
1505 * a message using the plugin. Note that in the case of a
1506 * peer disconnecting, the continuation MUST be called
1507 * prior to the disconnect notification itself. This function
1508 * will be called with this peer's HELLO message to initiate
1509 * a fresh connection to another peer.
1511 * @param cls closure
1512 * @param target who should receive this message
1513 * @param msgbuf the message to transmit
1514 * @param msgbuf_size number of bytes in 'msgbuf'
1515 * @param priority how important is the message (most plugins will
1516 * ignore message priority and just FIFO)
1517 * @param timeout how long to wait at most for the transmission (does not
1518 * require plugins to discard the message after the timeout,
1519 * just advisory for the desired delay; most plugins will ignore
1521 * @param session which session must be used (or NULL for "any")
1522 * @param addr the address to use (can be NULL if the plugin
1523 * is "on its own" (i.e. re-use existing TCP connection))
1524 * @param addrlen length of the address in bytes
1525 * @param force_address GNUNET_YES if the plugin MUST use the given address,
1526 * GNUNET_NO means the plugin may use any other address and
1527 * GNUNET_SYSERR means that only reliable existing
1528 * bi-directional connections should be used (regardless
1530 * @param cont continuation to call once the message has
1531 * been transmitted (or if the transport is ready
1532 * for the next transmission call; or if the
1533 * peer disconnected...); can be NULL
1534 * @param cont_cls closure for cont
1535 * @return number of bytes used (on the physical network, with overheads);
1536 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1537 * and does NOT mean that the message was not transmitted (DV)
1540 http_plugin_send (void *cls,
1541 const struct GNUNET_PeerIdentity *target,
1544 unsigned int priority,
1545 struct GNUNET_TIME_Relative to,
1546 struct Session *session,
1550 GNUNET_TRANSPORT_TransmitContinuation cont,
1553 struct Plugin *plugin = cls;
1554 struct HTTP_Message *msg;
1556 struct HTTP_PeerContext * pc;
1557 struct Session * ps = NULL;
1558 struct Session * ps_tmp = NULL;
1560 GNUNET_assert(cls !=NULL);
1562 char * force = GNUNET_malloc(40);
1563 if (force_address == GNUNET_YES)
1564 strcpy(force,"forced addr.");
1565 if (force_address == GNUNET_NO)
1566 strcpy(force,"any addr.");
1567 if (force_address == GNUNET_SYSERR)
1568 strcpy(force,"reliable bi-direc. address addr.");
1569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport tells me to send %u bytes to `%s' using %s (%s) and session: %X\n",
1573 http_plugin_address_to_string(NULL, addr, addrlen),
1577 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1581 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
1582 pc->plugin = plugin;
1583 pc->session_id_counter=1;
1584 memcpy(&pc->identity, target, sizeof(struct GNUNET_PeerIdentity));
1585 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1588 /* Search for existing session using the passed address */
1589 if ((addr!=NULL) && (addrlen != 0))
1591 ps = get_Session(plugin, pc, addr, addrlen);
1594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Found existing connection to peer %s with given address, using %X\n", GNUNET_i2s(target), ps);
1596 /* Search for existing session using the passed session */
1597 if ((ps==NULL) && (force_address != GNUNET_YES))
1600 while (ps_tmp!=NULL)
1602 if ((ps_tmp==session) && (ps_tmp->recv_force_disconnect==GNUNET_NO) && (ps_tmp->send_force_disconnect==GNUNET_NO) &&
1603 (ps_tmp->recv_connected==GNUNET_YES) && (ps_tmp->send_connected==GNUNET_YES))
1605 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);
1609 ps_tmp=ps_tmp->next;
1613 /* session not existing, address not forced -> looking for other session */
1614 if ((ps==NULL) && (force_address != GNUNET_YES))
1616 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));
1617 /* Choosing different session to peer when possible */
1618 struct Session * tmp = pc->head;
1621 if ((tmp->recv_connected) && (tmp->send_connected) && (tmp->recv_force_disconnect==GNUNET_NO) && (tmp->send_force_disconnect==GNUNET_NO))
1628 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, selected connection %X\n", GNUNET_i2s(target),ps);
1630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, no connection found\n", GNUNET_i2s(target));
1633 /* session not existing, but address forced -> creating new session */
1634 if ((ps==NULL) || ((ps==NULL) && (force_address == GNUNET_YES)))
1636 if ((addr!=NULL) && (addrlen!=0))
1638 if (force_address == GNUNET_YES)
1639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection & forced address: creating new connection to peer %s\n", GNUNET_i2s(target));
1640 if (force_address != GNUNET_YES)
1641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection: creating new connection to peer %s\n", GNUNET_i2s(target));
1643 ps = GNUNET_malloc(sizeof (struct Session));
1644 if ((addrlen!=0) && (addr!=NULL))
1646 ps->addr = GNUNET_malloc(addrlen);
1647 memcpy(ps->addr,addr,addrlen);
1648 ps->addrlen = addrlen;
1655 ps->direction=OUTBOUND;
1656 ps->recv_connected = GNUNET_NO;
1657 ps->recv_force_disconnect = GNUNET_NO;
1658 ps->send_connected = GNUNET_NO;
1659 ps->send_force_disconnect = GNUNET_NO;
1660 ps->pending_msgs_head = NULL;
1661 ps->pending_msgs_tail = NULL;
1663 ps->session_id = pc->session_id_counter;
1664 pc->session_id_counter++;
1665 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
1666 if (ps->msgtok == NULL)
1667 ps->msgtok = GNUNET_SERVER_mst_create (&curl_receive_mst_cb, ps);
1668 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
1672 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));
1673 return GNUNET_SYSERR;
1678 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
1680 msg->size = msgbuf_size;
1682 msg->buf = (char *) &msg[1];
1683 msg->transmit_cont = cont;
1684 msg->transmit_cont_cls = cont_cls;
1685 memcpy (msg->buf,msgbuf, msgbuf_size);
1686 GNUNET_CONTAINER_DLL_insert(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
1688 if (send_check_connections (plugin, ps) != GNUNET_SYSERR)
1691 return GNUNET_SYSERR;
1697 * Function that can be used to force the plugin to disconnect
1698 * from the given peer and cancel all previous transmissions
1699 * (and their continuationc).
1701 * @param cls closure
1702 * @param target peer from which to disconnect
1705 http_plugin_disconnect (void *cls,
1706 const struct GNUNET_PeerIdentity *target)
1709 struct Plugin *plugin = cls;
1710 struct HTTP_PeerContext *pc = NULL;
1711 struct Session *ps = NULL;
1712 //struct Session *tmp = NULL;
1714 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1722 if (ps->direction==OUTBOUND)
1724 if (ps->send_endpoint!=NULL)
1726 //curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1727 //curl_easy_cleanup(ps->send_endpoint);
1728 //ps->send_endpoint=NULL;
1729 ps->send_force_disconnect = GNUNET_YES;
1731 if (ps->recv_endpoint!=NULL)
1733 //curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1734 //curl_easy_cleanup(ps->recv_endpoint);
1735 //ps->recv_endpoint=NULL;
1736 ps->recv_force_disconnect = GNUNET_YES;
1740 if (ps->direction==INBOUND)
1742 ps->recv_force_disconnect = GNUNET_YES;
1743 ps->send_force_disconnect = GNUNET_YES;
1746 while (ps->pending_msgs_head!=NULL)
1748 remove_http_message(ps, ps->pending_msgs_head);
1750 ps->recv_active = GNUNET_NO;
1751 ps->send_active = GNUNET_NO;
1758 * Convert the transports address to a nice, human-readable
1761 * @param cls closure
1762 * @param type name of the transport that generated the address
1763 * @param addr one of the addresses of the host, NULL for the last address
1764 * the specific address format depends on the transport
1765 * @param addrlen length of the address
1766 * @param numeric should (IP) addresses be displayed in numeric form?
1767 * @param timeout after how long should we give up?
1768 * @param asc function to call on each string
1769 * @param asc_cls closure for asc
1772 http_plugin_address_pretty_printer (void *cls,
1777 struct GNUNET_TIME_Relative timeout,
1778 GNUNET_TRANSPORT_AddressStringCallback
1781 const struct IPv4HttpAddress *t4;
1782 const struct IPv6HttpAddress *t6;
1783 struct sockaddr_in a4;
1784 struct sockaddr_in6 a6;
1790 GNUNET_assert(cls !=NULL);
1791 if (addrlen == sizeof (struct IPv6HttpAddress))
1793 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1795 a6.sin6_addr = t6->ipv6_addr;
1796 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1797 port = ntohs(t6->u6_port);
1799 else if (addrlen == sizeof (struct IPv4HttpAddress))
1801 address = GNUNET_malloc (INET_ADDRSTRLEN);
1803 a4.sin_addr.s_addr = t4->ipv4_addr;
1804 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1805 port = ntohs(t4->u_port);
1809 /* invalid address */
1810 GNUNET_break_op (0);
1811 asc (asc_cls, NULL);
1814 res = GNUNET_asprintf(&ret,"http://%s:%u/",address,port);
1815 GNUNET_free (address);
1816 GNUNET_assert(res != 0);
1824 * Another peer has suggested an address for this
1825 * peer and transport plugin. Check that this could be a valid
1826 * address. If so, consider adding it to the list
1829 * @param cls closure
1830 * @param addr pointer to the address
1831 * @param addrlen length of addr
1832 * @return GNUNET_OK if this is a plausible address for this peer
1836 http_plugin_address_suggested (void *cls,
1837 const void *addr, size_t addrlen)
1839 struct Plugin *plugin = cls;
1840 struct IPv4HttpAddress *v4;
1841 struct IPv6HttpAddress *v6;
1844 GNUNET_assert(cls !=NULL);
1845 if ((addrlen != sizeof (struct IPv4HttpAddress)) &&
1846 (addrlen != sizeof (struct IPv6HttpAddress)))
1848 return GNUNET_SYSERR;
1850 if (addrlen == sizeof (struct IPv4HttpAddress))
1852 v4 = (struct IPv4HttpAddress *) addr;
1853 if (INADDR_LOOPBACK == ntohl(v4->ipv4_addr))
1855 return GNUNET_SYSERR;
1857 port = ntohs (v4->u_port);
1858 if (port != plugin->port_inbound)
1860 return GNUNET_SYSERR;
1863 if (addrlen == sizeof (struct IPv6HttpAddress))
1865 v6 = (struct IPv6HttpAddress *) addr;
1866 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1868 return GNUNET_SYSERR;
1870 port = ntohs (v6->u6_port);
1871 if (port != plugin->port_inbound)
1873 return GNUNET_SYSERR;
1882 * Function called for a quick conversion of the binary address to
1883 * a numeric address. Note that the caller must not free the
1884 * address and that the next call to this function is allowed
1885 * to override the address again.
1887 * @param cls closure
1888 * @param addr binary address
1889 * @param addrlen length of the address
1890 * @return string representing the same address
1893 http_plugin_address_to_string (void *cls,
1897 const struct IPv4HttpAddress *t4;
1898 const struct IPv6HttpAddress *t6;
1899 struct sockaddr_in a4;
1900 struct sockaddr_in6 a6;
1906 if (addrlen == sizeof (struct IPv6HttpAddress))
1908 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1910 a6.sin6_addr = t6->ipv6_addr;
1911 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1912 port = ntohs(t6->u6_port);
1914 else if (addrlen == sizeof (struct IPv4HttpAddress))
1916 address = GNUNET_malloc (INET_ADDRSTRLEN);
1918 a4.sin_addr.s_addr = t4->ipv4_addr;
1919 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1920 port = ntohs(t4->u_port);
1924 /* invalid address */
1927 res = GNUNET_asprintf(&ret,"%s:%u",address,port);
1928 GNUNET_free (address);
1929 GNUNET_assert(res != 0);
1934 * Add the IP of our network interface to the list of
1935 * our external IP addresses.
1937 * @param cls the 'struct Plugin*'
1938 * @param name name of the interface
1939 * @param isDefault do we think this may be our default interface
1940 * @param addr address of the interface
1941 * @param addrlen number of bytes in addr
1942 * @return GNUNET_OK to continue iterating
1945 process_interfaces (void *cls,
1948 const struct sockaddr *addr, socklen_t addrlen)
1950 struct Plugin *plugin = cls;
1951 struct IPv4HttpAddress * t4;
1952 struct IPv6HttpAddress * t6;
1955 GNUNET_assert(cls !=NULL);
1956 af = addr->sa_family;
1959 t4 = GNUNET_malloc(sizeof(struct IPv4HttpAddress));
1960 if (INADDR_LOOPBACK == ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr))
1962 /* skip loopback addresses */
1965 t4->ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1966 t4->u_port = htons (plugin->port_inbound);
1967 plugin->env->notify_address(plugin->env->cls,"http",t4, sizeof (struct IPv4HttpAddress), GNUNET_TIME_UNIT_FOREVER_REL);
1970 else if (af == AF_INET6)
1972 t6 = GNUNET_malloc(sizeof(struct IPv6HttpAddress));
1973 if (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr))
1975 /* skip link local addresses */
1978 if (IN6_IS_ADDR_LOOPBACK (&((struct sockaddr_in6 *) addr)->sin6_addr))
1980 /* skip loopback addresses */
1983 memcpy (&t6->ipv6_addr,
1984 &((struct sockaddr_in6 *) addr)->sin6_addr,
1985 sizeof (struct in6_addr));
1986 t6->u6_port = htons (plugin->port_inbound);
1987 plugin->env->notify_address(plugin->env->cls,"http",t6,sizeof (struct IPv6HttpAddress) , GNUNET_TIME_UNIT_FOREVER_REL);
1992 int remove_peer_context_Iterator (void *cls, const GNUNET_HashCode *key, void *value)
1994 struct HTTP_PeerContext * pc = value;
1995 struct Session * ps = pc->head;
1996 struct Session * tmp = NULL;
1997 struct HTTP_Message * msg = NULL;
1998 struct HTTP_Message * msg_tmp = NULL;
2000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing context for peer `%s'\n",GNUNET_i2s(&pc->identity));
2006 GNUNET_free_non_null (ps->addr);
2007 GNUNET_free(ps->url);
2008 if (ps->msgtok != NULL)
2009 GNUNET_SERVER_mst_destroy (ps->msgtok);
2011 msg = ps->pending_msgs_head;
2014 msg_tmp = msg->next;
2018 if (ps->direction==OUTBOUND)
2020 if (ps->send_endpoint!=NULL)
2021 curl_easy_cleanup(ps->send_endpoint);
2022 if (ps->recv_endpoint!=NULL)
2023 curl_easy_cleanup(ps->recv_endpoint);
2035 * Exit point from the plugin.
2038 libgnunet_plugin_transport_http_done (void *cls)
2040 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
2041 struct Plugin *plugin = api->cls;
2044 GNUNET_assert(cls !=NULL);
2046 if (plugin->http_server_daemon_v4 != NULL)
2048 MHD_stop_daemon (plugin->http_server_daemon_v4);
2049 plugin->http_server_daemon_v4 = NULL;
2051 if (plugin->http_server_daemon_v6 != NULL)
2053 MHD_stop_daemon (plugin->http_server_daemon_v6);
2054 plugin->http_server_daemon_v6 = NULL;
2059 if ( plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2061 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
2062 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
2065 if ( plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2067 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
2068 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2071 if ( plugin->http_curl_task != GNUNET_SCHEDULER_NO_TASK)
2073 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_curl_task);
2074 plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
2077 /* free all peer information */
2078 if (plugin->peers!=NULL)
2080 GNUNET_CONTAINER_multihashmap_iterate (plugin->peers,
2081 &remove_peer_context_Iterator,
2083 GNUNET_CONTAINER_multihashmap_destroy (plugin->peers);
2086 mret = curl_multi_cleanup(plugin->multi_handle);
2087 if ( CURLM_OK != mret)
2088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed");
2089 plugin->multi_handle = NULL;
2091 GNUNET_free (plugin);
2093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unload http plugin complete...\n");
2099 * Entry point for the plugin.
2102 libgnunet_plugin_transport_http_init (void *cls)
2104 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2105 struct Plugin *plugin;
2106 struct GNUNET_TRANSPORT_PluginFunctions *api;
2107 struct GNUNET_TIME_Relative gn_timeout;
2108 long long unsigned int port;
2110 GNUNET_assert(cls !=NULL);
2111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
2113 plugin = GNUNET_malloc (sizeof (struct Plugin));
2115 plugin->peers = NULL;
2117 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2119 api->send = &http_plugin_send;
2120 api->disconnect = &http_plugin_disconnect;
2121 api->address_pretty_printer = &http_plugin_address_pretty_printer;
2122 api->check_address = &http_plugin_address_suggested;
2123 api->address_to_string = &http_plugin_address_to_string;
2125 /* Hashing our identity to use it in URLs */
2126 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &plugin->my_ascii_hash_ident);
2128 /* Reading port number from config file */
2130 GNUNET_CONFIGURATION_get_value_number (env->cfg,
2136 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2139 ("Require valid port number for transport plugin `%s' in configuration!\n"),
2141 libgnunet_plugin_transport_http_done (api);
2144 GNUNET_assert ((port > 0) && (port <= 65535));
2145 plugin->port_inbound = port;
2146 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
2147 if ((plugin->http_server_daemon_v4 == NULL) && (plugin->http_server_daemon_v6 == NULL) && (port != 0))
2149 plugin->http_server_daemon_v6 = MHD_start_daemon (MHD_USE_IPv6 | MHD_USE_DEBUG,
2152 plugin , &mdh_access_cb, plugin,
2153 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
2154 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
2155 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
2156 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2157 MHD_OPTION_NOTIFY_COMPLETED, &mhd_termination_cb, NULL,
2159 plugin->http_server_daemon_v4 = MHD_start_daemon (MHD_NO_FLAG | MHD_USE_DEBUG,
2162 plugin , &mdh_access_cb, plugin,
2163 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
2164 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
2165 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
2166 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2167 MHD_OPTION_NOTIFY_COMPLETED, &mhd_termination_cb, NULL,
2170 if (plugin->http_server_daemon_v4 != NULL)
2171 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
2172 if (plugin->http_server_daemon_v6 != NULL)
2173 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
2175 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
2177 else if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2178 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
2181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No MHD was started, transport plugin not functional!\n");
2182 libgnunet_plugin_transport_http_done (api);
2186 /* Initializing cURL */
2187 curl_global_init(CURL_GLOBAL_ALL);
2188 plugin->multi_handle = curl_multi_init();
2190 if ( NULL == plugin->multi_handle )
2192 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2194 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
2196 libgnunet_plugin_transport_http_done (api);
2200 plugin->peers = GNUNET_CONTAINER_multihashmap_create (10);
2201 GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
2206 /* end of plugin_transport_http.c */