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
282 * entity managing sending data
283 * outbound session: pointer to curl easy handle
285 void * send_endpoint;
288 * entity managing recieving data
289 * outbound session: pointer to curl easy handle
291 void * recv_endpoint;
295 * Encapsulation of all of the state of the plugin.
302 struct GNUNET_TRANSPORT_PluginEnvironment *env;
304 unsigned int port_inbound;
306 struct GNUNET_CONTAINER_MultiHashMap *peers;
309 * Daemon for listening for new IPv4 connections.
311 struct MHD_Daemon *http_server_daemon_v4;
314 * Daemon for listening for new IPv6connections.
316 struct MHD_Daemon *http_server_daemon_v6;
319 * Our primary task for http daemon handling IPv4 connections
321 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v4;
324 * Our primary task for http daemon handling IPv6 connections
326 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v6;
329 * The task sending data
331 GNUNET_SCHEDULER_TaskIdentifier http_server_task_send;
336 CURLM * multi_handle;
339 * Our ASCII encoded, hashed peer identity
340 * This string is used to distinguish between connections and is added to the urls
342 struct GNUNET_CRYPTO_HashAsciiEncoded my_ascii_hash_ident;
347 * Function called for a quick conversion of the binary address to
348 * a numeric address. Note that the caller must not free the
349 * address and that the next call to this function is allowed
350 * to override the address again.
353 * @param addr binary address
354 * @param addrlen length of the address
355 * @return string representing the same address
358 http_plugin_address_to_string (void *cls,
362 static char * create_url(void * cls, const void * addr, size_t addrlen, size_t id)
364 struct Plugin *plugin = cls;
367 GNUNET_assert ((addr!=NULL) && (addrlen != 0));
368 GNUNET_asprintf(&url,
370 http_plugin_address_to_string(NULL, addr, addrlen),
371 (char *) (&plugin->my_ascii_hash_ident),id);
377 * Removes a message from the linked list of messages
378 * @param con connection to remove message from
379 * @param msg message to remove
380 * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
383 static int remove_http_message(struct Session * ps, struct HTTP_Message * msg)
385 GNUNET_CONTAINER_DLL_remove(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
390 static struct Session * get_Session (void * cls, struct HTTP_PeerContext *pc, const void * addr, size_t addr_len)
392 struct Session * cc = pc->head;
393 struct Session * con = NULL;
394 unsigned int count = 0;
396 GNUNET_assert((addr_len == sizeof (struct IPv4HttpAddress)) || (addr_len == sizeof (struct IPv6HttpAddress)));
399 if (addr_len == cc->addrlen)
401 if (0 == memcmp(cc->addr, addr, addr_len))
403 /* connection can not be used, since it is disconnected */
404 if ((cc->recv_force_disconnect==GNUNET_NO) && (cc->send_force_disconnect==GNUNET_NO))
417 * Callback called by MHD when a connection is terminated
419 static void requestCompletedCallback (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
421 struct Session * ps = *httpSessionCache;
425 #if DEBUG_CONNECTIONS
426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&ps->peercontext->identity));
428 /* session set to inactive */
432 static void mhd_write_mst_cb (void *cls,
434 const struct GNUNET_MessageHeader *message)
437 struct Session *ps = cls;
438 struct HTTP_PeerContext *pc = ps->peercontext;
439 GNUNET_assert(ps != NULL);
440 GNUNET_assert(pc != NULL);
442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
443 "Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
444 ntohs(message->type),
445 ntohs(message->size),
446 GNUNET_i2s(&(ps->peercontext)->identity),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
448 pc->plugin->env->receive (ps->peercontext->plugin->env->cls,
455 static void curl_write_mst_cb (void *cls,
457 const struct GNUNET_MessageHeader *message)
459 struct Session *ps = cls;
460 struct HTTP_PeerContext *pc = ps->peercontext;
461 GNUNET_assert(ps != NULL);
462 GNUNET_assert(pc != NULL);
464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
465 "Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
466 ntohs(message->type),
467 ntohs(message->size),
468 GNUNET_i2s(&(pc->identity)),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
470 pc->plugin->env->receive (pc->plugin->env->cls,
479 * Check if ip is allowed to connect.
482 acceptPolicyCallback (void *cls,
483 const struct sockaddr *addr, socklen_t addr_len)
486 struct Plugin *plugin = cls;
488 /* Every connection is accepted, nothing more to do here */
492 int server_read_callback (void *cls, uint64_t pos, char *buf, int max)
496 struct Session * ps = cls;
497 struct HTTP_PeerContext * pc;
498 struct HTTP_Message * msg;
501 GNUNET_assert (ps!=NULL);
502 pc = ps->peercontext;
503 msg = ps->pending_msgs_tail;
505 if (ps->send_force_disconnect)
507 #if DEBUG_CONNECTIONS
508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound forced to disconnect\n",ps);
515 if ((msg->size-msg->pos) <= max)
517 memcpy(buf,&msg->buf[pos],(msg->size-msg->pos));
518 pos+=(msg->size-msg->pos);
522 memcpy(buf,&msg->buf[pos],max);
526 if (msg->pos==msg->size)
528 if (NULL!=msg->transmit_cont)
529 msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
530 res = remove_http_message(ps,msg);
537 * Process GET or PUT request received via MHD. For
538 * GET, queue response that will send back our pending
539 * messages. For PUT, process incoming data and send
540 * to GNUnet core. In either case, check if a session
541 * already exists and create a new one if not.
544 accessHandlerCallback (void *cls,
545 struct MHD_Connection *mhd_connection,
549 const char *upload_data,
550 size_t * upload_data_size, void **httpSessionCache)
552 struct Plugin *plugin = cls;
553 struct MHD_Response *response;
554 const union MHD_ConnectionInfo * conn_info;
556 struct sockaddr_in *addrin;
557 struct sockaddr_in6 *addrin6;
559 char address[INET6_ADDRSTRLEN+14];
560 struct GNUNET_PeerIdentity pi_in;
563 struct IPv4HttpAddress ipv4addr;
564 struct IPv6HttpAddress ipv6addr;
566 struct HTTP_PeerContext *pc;
568 struct Session *ps_tmp;
571 int send_error_to_client;
575 GNUNET_assert(cls !=NULL);
576 send_error_to_client = GNUNET_NO;
578 if (NULL == *httpSessionCache)
580 /* check url for peer identity , if invalid send HTTP 404*/
581 size_t len = strlen(&url[1]);
582 char * peer = GNUNET_malloc(104+1);
584 if ((len>104) && (url[104]==';'))
586 char * id = GNUNET_malloc((len-104)+1);
587 strcpy(id,&url[105]);
588 memcpy(peer,&url[1],103);
590 id_num = strtoul ( id, NULL , 10);
591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"id is string %s num %u, peer is %s\n",id,id_num,peer);
594 res = GNUNET_CRYPTO_hash_from_string (peer, &(pi_in.hashPubKey));
596 if ( GNUNET_SYSERR == res )
598 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
599 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
600 MHD_destroy_response (response);
602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, sent HTTP 1.1/404\n");
604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, could not send error\n");
610 ps = *httpSessionCache;
611 pc = ps->peercontext;
614 if (NULL == *httpSessionCache)
616 /* get peer context */
617 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &pi_in.hashPubKey);
621 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
623 pc->session_id_counter=1;
624 memcpy(&pc->identity, &pi_in, sizeof(struct GNUNET_PeerIdentity));
625 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
628 conn_info = MHD_get_connection_info(mhd_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
629 /* Incoming IPv4 connection */
630 if ( AF_INET == conn_info->client_addr->sin_family)
632 addrin = conn_info->client_addr;
633 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
634 memcpy(&ipv4addr.ipv4_addr,&(addrin->sin_addr),sizeof(struct in_addr));
635 ipv4addr.u_port = addrin->sin_port;
637 addr_len = sizeof(struct IPv4HttpAddress);
639 /* Incoming IPv6 connection */
640 if ( AF_INET6 == conn_info->client_addr->sin_family)
642 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
643 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
644 memcpy(&ipv6addr.ipv6_addr,&(addrin6->sin6_addr),sizeof(struct in6_addr));
645 ipv6addr.u6_port = addrin6->sin6_port;
647 addr_len = sizeof(struct IPv6HttpAddress);
651 ps = get_Session(plugin, pc, addr, addr_len);
653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"SEARCHING HTTP SESSION\n");
658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"SEARCHING HTTP SESSION II\n");
659 if ((ps_tmp->session_id == id_num) && (id_num!=0))
661 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP SESSION FOUND\n");
671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"NO HTTP SESSION FOUND\n");
672 ps = GNUNET_malloc(sizeof (struct Session));
673 ps->addr = GNUNET_malloc(addr_len);
674 memcpy(ps->addr,addr,addr_len);
675 ps->addrlen = addr_len;
676 ps->direction=INBOUND;
677 ps->pending_msgs_head = NULL;
678 ps->pending_msgs_tail = NULL;
679 ps->send_connected=GNUNET_NO;
680 ps->send_active=GNUNET_NO;
681 ps->recv_connected=GNUNET_NO;
682 ps->recv_active=GNUNET_NO;
684 ps->session_id =id_num;
685 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
686 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
689 *httpSessionCache = ps;
690 if (ps->msgtok==NULL)
691 ps->msgtok = GNUNET_SERVER_mst_create (&mhd_write_mst_cb, ps);
693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Daemon has new an incoming `%s' request from peer `%s' (`%s')\n",
695 GNUNET_i2s(&pc->identity),
696 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen));
699 /* Is it a PUT or a GET request */
700 if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
702 if (ps->recv_force_disconnect)
704 #if DEBUG_CONNECTIONS
705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound forced to disconnect\n",ps);
707 ps->recv_connected = GNUNET_NO;
708 ps->recv_active = GNUNET_NO;
711 if ((*upload_data_size == 0) && (ps->recv_active==GNUNET_NO))
713 ps->recv_active = GNUNET_YES;
717 /* Transmission of all data complete */
718 if ((*upload_data_size == 0) && (ps->recv_active == GNUNET_YES))
720 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
721 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
722 #if DEBUG_CONNECTIONS
723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Sent HTTP/1.1: 200 OK as PUT Response\n",ps);
725 MHD_destroy_response (response);
726 ps->recv_active=GNUNET_NO;
731 if ((*upload_data_size > 0) && (ps->recv_active == GNUNET_YES))
733 res = GNUNET_SERVER_mst_receive(ps->msgtok, ps, upload_data,*upload_data_size, GNUNET_NO, GNUNET_NO);
734 (*upload_data_size) = 0;
740 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
742 if (ps->send_force_disconnect)
744 #if DEBUG_CONNECTIONS
745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound forced to disconnect\n",ps);
747 ps->send_connected = GNUNET_NO;
748 ps->send_active = GNUNET_NO;
751 response = MHD_create_response_from_callback(-1,32 * 1024, &server_read_callback, ps, NULL);
752 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
753 MHD_destroy_response (response);
761 * Call MHD to process pending ipv4 requests and then go back
762 * and schedule the next run.
764 static void http_server_daemon_v4_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
766 * Call MHD to process pending ipv6 requests and then go back
767 * and schedule the next run.
769 static void http_server_daemon_v6_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
772 * Function that queries MHD's select sets and
773 * starts the task waiting for them.
775 static GNUNET_SCHEDULER_TaskIdentifier
776 http_server_daemon_prepare (void * cls, struct MHD_Daemon *daemon_handle)
778 struct Plugin *plugin = cls;
779 GNUNET_SCHEDULER_TaskIdentifier ret;
783 struct GNUNET_NETWORK_FDSet *wrs;
784 struct GNUNET_NETWORK_FDSet *wws;
785 struct GNUNET_NETWORK_FDSet *wes;
787 unsigned long long timeout;
789 struct GNUNET_TIME_Relative tv;
791 GNUNET_assert(cls !=NULL);
792 ret = GNUNET_SCHEDULER_NO_TASK;
796 wrs = GNUNET_NETWORK_fdset_create ();
797 wes = GNUNET_NETWORK_fdset_create ();
798 wws = GNUNET_NETWORK_fdset_create ();
800 GNUNET_assert (MHD_YES ==
801 MHD_get_fdset (daemon_handle,
806 haveto = MHD_get_timeout (daemon_handle, &timeout);
807 if (haveto == MHD_YES)
808 tv.value = (uint64_t) timeout;
810 tv = GNUNET_TIME_UNIT_FOREVER_REL;
811 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
812 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
813 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
814 if (daemon_handle == plugin->http_server_daemon_v4)
816 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
817 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
818 GNUNET_SCHEDULER_NO_TASK,
822 &http_server_daemon_v4_run,
825 if (daemon_handle == plugin->http_server_daemon_v6)
827 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
828 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
829 GNUNET_SCHEDULER_NO_TASK,
833 &http_server_daemon_v6_run,
836 GNUNET_NETWORK_fdset_destroy (wrs);
837 GNUNET_NETWORK_fdset_destroy (wws);
838 GNUNET_NETWORK_fdset_destroy (wes);
843 * Call MHD to process pending requests and then go back
844 * and schedule the next run.
846 static void http_server_daemon_v4_run (void *cls,
847 const struct GNUNET_SCHEDULER_TaskContext *tc)
849 struct Plugin *plugin = cls;
851 GNUNET_assert(cls !=NULL);
852 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
853 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
855 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
858 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v4));
859 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
865 * Call MHD to process pending requests and then go back
866 * and schedule the next run.
868 static void http_server_daemon_v6_run (void *cls,
869 const struct GNUNET_SCHEDULER_TaskContext *tc)
871 struct Plugin *plugin = cls;
873 GNUNET_assert(cls !=NULL);
874 if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
875 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
877 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
880 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v6));
881 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
886 * Function setting up curl handle and selecting message to send
888 * @param ses session to send data to
889 * @param con connection
890 * @return bytes sent to peer
892 static ssize_t send_check_connections (void *cls, struct Session *ps);
894 static size_t curl_get_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
896 struct Session * ps = stream;
899 size_t len = size * nmemb;
900 long http_result = 0;
902 /* Getting last http result code */
903 if (ps->recv_connected==GNUNET_NO)
905 GNUNET_assert(NULL!=ps);
906 res = curl_easy_getinfo(ps->recv_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
909 if (http_result == 200)
911 ps->recv_connected = GNUNET_YES;
912 ps->recv_active = GNUNET_YES;
913 #if DEBUG_CONNECTIONS
914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to recieve data\n",ps);
916 // Calling send_check_connections again since receive is established
917 send_check_connections (ps->peercontext->plugin, ps);
923 if ((size * nmemb) < SIZE_MAX)
924 tmp = GNUNET_malloc (len+1);
926 if ((tmp != NULL) && (len > 0))
931 if (tmp[len-2] == 13)
935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
944 static size_t curl_put_header_function( void *ptr, size_t size, size_t nmemb, void *stream)
946 struct Session * ps = stream;
949 size_t len = size * nmemb;
950 long http_result = 0;
953 /* Getting last http result code */
954 GNUNET_assert(NULL!=ps);
955 res = curl_easy_getinfo(ps->send_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
958 if ((http_result == 100) && (ps->send_connected==GNUNET_NO))
960 ps->send_connected = GNUNET_YES;
961 ps->send_active = GNUNET_YES;
962 #if DEBUG_CONNECTIONS
963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to send data\n",ps);
966 if ((http_result == 200) && (ps->send_connected==GNUNET_YES))
968 ps->send_connected = GNUNET_NO;
969 ps->send_active = GNUNET_NO;
970 #if DEBUG_CONNECTIONS
971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: sending disconnected\n",ps);
977 if ((size * nmemb) < SIZE_MAX)
978 tmp = GNUNET_malloc (len+1);
980 if ((tmp != NULL) && (len > 0))
985 if (tmp[len-2] == 13)
989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s' %u \n",tmp, http_result);
999 * Callback method used with libcurl
1000 * Method is called when libcurl needs to read data during sending
1001 * @param stream pointer where to write data
1002 * @param size size of an individual element
1003 * @param nmemb count of elements that can be written to the buffer
1004 * @param ptr source pointer, passed to the libcurl handle
1005 * @return bytes written to stream
1007 static size_t send_curl_send_callback(void *stream, size_t size, size_t nmemb, void *ptr)
1009 struct Session * ps = ptr;
1010 struct HTTP_Message * msg = ps->pending_msgs_tail;
1014 if (ps->pending_msgs_tail == NULL)
1016 #if DEBUG_CONNECTIONS
1017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: No Message to send, pausing connection\n",ps);
1019 ps->send_active = GNUNET_NO;
1020 return CURL_READFUNC_PAUSE;
1023 msg = ps->pending_msgs_tail;
1025 if (msg->pos < msg->size)
1027 /* data fit in buffer */
1028 if ((msg->size - msg->pos) <= (size * nmemb))
1030 len = (msg->size - msg->pos);
1031 memcpy(stream, &msg->buf[msg->pos], len);
1038 memcpy(stream, &msg->buf[msg->pos], len);
1043 /* no data to send */
1049 if ( msg->pos == msg->size)
1051 #if DEBUG_CONNECTIONS
1052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Message with %u bytes sent, removing message from queue \n",ps, msg->pos);
1054 /* Calling transmit continuation */
1055 if (( NULL != ps->pending_msgs_tail) && (NULL != ps->pending_msgs_tail->transmit_cont))
1056 msg->transmit_cont (ps->pending_msgs_tail->transmit_cont_cls,&(ps->peercontext)->identity,GNUNET_OK);
1057 remove_http_message(ps, msg);
1063 * Callback method used with libcurl
1064 * Method is called when libcurl needs to write data during sending
1065 * @param stream pointer where to write data
1066 * @param size size of an individual element
1067 * @param nmemb count of elements that can be written to the buffer
1068 * @param ptr destination pointer, passed to the libcurl handle
1069 * @return bytes read from stream
1071 static size_t send_curl_receive_callback( void *stream, size_t size, size_t nmemb, void *ptr)
1073 struct Session * ps = ptr;
1074 #if DEBUG_CONNECTIONS
1075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: %u bytes recieved\n",ps, size*nmemb);
1077 GNUNET_SERVER_mst_receive(ps->msgtok, ps, stream, size*nmemb, GNUNET_NO, GNUNET_NO);
1078 return (size * nmemb);
1083 * Function setting up file descriptors and scheduling task to run
1084 * @param cls closure
1085 * @param ses session to send data to
1086 * @return bytes sent to peer
1088 static size_t send_schedule(void *cls, struct Session* ses );
1093 * Function setting up curl handle and selecting message to send
1095 * @param ses session to send data to
1096 * @param con connection
1097 * @return bytes sent to peer
1099 static ssize_t send_check_connections (void *cls, struct Session *ps)
1101 struct Plugin *plugin = cls;
1104 struct HTTP_Message * msg;
1105 struct GNUNET_TIME_Relative timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1107 GNUNET_assert(cls !=NULL);
1109 if (ps->direction == OUTBOUND)
1111 /* RECV DIRECTION */
1112 /* Check if session is connected to receive data, otherwise connect to peer */
1113 if (ps->recv_connected == GNUNET_NO)
1115 if (ps->recv_endpoint == NULL)
1117 ps->recv_endpoint = curl_easy_init();
1119 curl_easy_setopt(ps->recv_endpoint, CURLOPT_VERBOSE, 1L);
1121 curl_easy_setopt(ps->recv_endpoint, CURLOPT_URL, ps->url);
1122 curl_easy_setopt(ps->recv_endpoint, CURLOPT_HEADERFUNCTION, &curl_get_header_function);
1123 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEHEADER, ps);
1124 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READFUNCTION, send_curl_send_callback);
1125 curl_easy_setopt(ps->recv_endpoint, CURLOPT_READDATA, ps);
1126 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEFUNCTION, send_curl_receive_callback);
1127 curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEDATA, ps);
1128 curl_easy_setopt(ps->recv_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1129 curl_easy_setopt(ps->recv_endpoint, CURLOPT_PRIVATE, ps);
1130 curl_easy_setopt(ps->recv_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1131 curl_easy_setopt(ps->recv_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1133 mret = curl_multi_add_handle(plugin->multi_handle, ps->recv_endpoint);
1134 if (mret != CURLM_OK)
1136 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1137 _("%s failed at %s:%d: `%s'\n"),
1138 "curl_multi_add_handle", __FILE__, __LINE__,
1139 curl_multi_strerror (mret));
1142 bytes_sent = send_schedule (plugin, NULL);
1143 if (ps->msgtok != NULL)
1144 ps->msgtok = GNUNET_SERVER_mst_create (&curl_write_mst_cb, ps);
1145 #if DEBUG_CONNECTIONS
1146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound not connected, initiating connection\n",ps);
1151 /* waiting for receive direction */
1152 if (ps->recv_connected==GNUNET_NO)
1155 /* SEND DIRECTION */
1156 /* Check if session is connected to send data, otherwise connect to peer */
1157 if ((ps->send_connected == GNUNET_YES) && (ps->send_endpoint!= NULL))
1159 if (ps->send_active == GNUNET_YES)
1161 #if DEBUG_CONNECTIONS
1162 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound active, enqueueing message\n",ps);
1166 if (ps->send_active == GNUNET_NO)
1168 #if DEBUG_CONNECTIONS
1169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound paused, unpausing existing connection and enqueueing message\n",ps);
1171 curl_easy_pause(ps->send_endpoint,CURLPAUSE_CONT);
1172 ps->send_active=GNUNET_YES;
1176 /* not connected, initiate connection */
1177 if ((ps->send_connected==GNUNET_NO) && (NULL == ps->send_endpoint))
1178 ps->send_endpoint = curl_easy_init();
1179 GNUNET_assert (ps->send_endpoint != NULL);
1180 GNUNET_assert (NULL != ps->pending_msgs_tail);
1181 #if DEBUG_CONNECTIONS
1182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound not connected, initiating connection\n",ps);
1184 ps->send_active = GNUNET_NO;
1185 msg = ps->pending_msgs_tail;
1188 curl_easy_setopt(ps->send_endpoint, CURLOPT_VERBOSE, 1L);
1190 curl_easy_setopt(ps->send_endpoint, CURLOPT_URL, ps->url);
1191 curl_easy_setopt(ps->send_endpoint, CURLOPT_PUT, 1L);
1192 curl_easy_setopt(ps->send_endpoint, CURLOPT_HEADERFUNCTION, &curl_put_header_function);
1193 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEHEADER, ps);
1194 curl_easy_setopt(ps->send_endpoint, CURLOPT_READFUNCTION, send_curl_send_callback);
1195 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1196 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEFUNCTION, send_curl_receive_callback);
1197 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1198 curl_easy_setopt(ps->send_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1199 curl_easy_setopt(ps->send_endpoint, CURLOPT_PRIVATE, ps);
1200 curl_easy_setopt(ps->send_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1201 curl_easy_setopt(ps->send_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1203 mret = curl_multi_add_handle(plugin->multi_handle, ps->send_endpoint);
1204 if (mret != CURLM_OK)
1206 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1207 _("%s failed at %s:%d: `%s'\n"),
1208 "curl_multi_add_handle", __FILE__, __LINE__,
1209 curl_multi_strerror (mret));
1212 bytes_sent = send_schedule (plugin, NULL);
1215 if (ps->direction == INBOUND)
1217 GNUNET_assert (NULL != ps->pending_msgs_tail);
1219 msg = ps->pending_msgs_tail;
1220 if ((ps->recv_connected==GNUNET_YES) && (ps->send_connected==GNUNET_YES))
1221 bytes_sent = msg->size;
1227 static void send_execute (void *cls,
1228 const struct GNUNET_SCHEDULER_TaskContext *tc)
1230 struct Plugin *plugin = cls;
1231 static unsigned int handles_last_run;
1233 struct CURLMsg *msg;
1235 struct Session *ps = NULL;
1236 struct HTTP_PeerContext *pc = NULL;
1237 struct HTTP_Message * cur_msg = NULL;
1240 GNUNET_assert(cls !=NULL);
1241 plugin->http_server_task_send = GNUNET_SCHEDULER_NO_TASK;
1242 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1248 mret = curl_multi_perform (plugin->multi_handle, &running);
1249 if (running < handles_last_run)
1254 msg = curl_multi_info_read (plugin->multi_handle, &running);
1257 /* get session for affected curl handle */
1258 GNUNET_assert ( msg->easy_handle != NULL );
1259 curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, (char *) &ps);
1260 GNUNET_assert ( ps != NULL );
1261 pc = ps->peercontext;
1262 GNUNET_assert ( pc != NULL );
1267 if ( (msg->data.result != CURLE_OK) &&
1268 (msg->data.result != CURLE_GOT_NOTHING) )
1270 /* sending msg failed*/
1271 if (msg->easy_handle == ps->send_endpoint)
1273 #if DEBUG_CONNECTIONS
1274 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1275 _("Connection %X: HTTP PUT to peer `%s' (`%s') failed: `%s' `%s'\n"),
1277 GNUNET_i2s(&pc->identity),
1278 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1279 "curl_multi_perform",
1280 curl_easy_strerror (msg->data.result));
1282 ps->send_connected = GNUNET_NO;
1283 ps->send_active = GNUNET_NO;
1284 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1285 curl_easy_cleanup(ps->send_endpoint);
1286 ps->send_endpoint=NULL;
1287 cur_msg = ps->pending_msgs_tail;
1288 if (( NULL != cur_msg) && ( NULL != cur_msg->transmit_cont))
1289 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1291 /* GET connection failed */
1292 if (msg->easy_handle == ps->recv_endpoint)
1294 #if DEBUG_CONNECTIONS
1295 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1296 _("Connection %X: HTTP GET to peer `%s' (`%s') failed: `%s' `%s'\n"),
1298 GNUNET_i2s(&pc->identity),
1299 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1300 "curl_multi_perform",
1301 curl_easy_strerror (msg->data.result));
1303 ps->recv_connected = GNUNET_NO;
1304 ps->recv_active = GNUNET_NO;
1305 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1306 curl_easy_cleanup(ps->recv_endpoint);
1307 ps->recv_endpoint=NULL;
1312 if (msg->easy_handle == ps->send_endpoint)
1314 GNUNET_assert (CURLE_OK == curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &http_result));
1315 #if DEBUG_CONNECTIONS
1316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1317 "Connection %X: HTTP PUT connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1319 GNUNET_i2s(&pc->identity),
1320 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1323 /* Calling transmit continuation */
1324 cur_msg = ps->pending_msgs_tail;
1325 if (( NULL != cur_msg) && (NULL != cur_msg->transmit_cont))
1327 /* HTTP 1xx : Last message before here was informational */
1328 if ((http_result >=100) && (http_result < 200))
1329 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1330 /* HTTP 2xx: successful operations */
1331 if ((http_result >=200) && (http_result < 300))
1332 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1333 /* HTTP 3xx..5xx: error */
1334 if ((http_result >=300) && (http_result < 600))
1335 cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1337 ps->send_connected = GNUNET_NO;
1338 ps->send_active = GNUNET_NO;
1339 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1340 curl_easy_cleanup(ps->send_endpoint);
1341 ps->send_endpoint =NULL;
1343 if (msg->easy_handle == ps->recv_endpoint)
1345 #if DEBUG_CONNECTIONS
1346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1347 "Connection %X: HTTP GET connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1349 GNUNET_i2s(&pc->identity),
1350 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1353 ps->recv_connected = GNUNET_NO;
1354 ps->recv_active = GNUNET_NO;
1355 curl_multi_remove_handle(plugin->multi_handle,msg->easy_handle);
1356 curl_easy_cleanup(ps->recv_endpoint);
1357 ps->recv_endpoint=NULL;
1360 if (ps->pending_msgs_tail != NULL)
1362 if (ps->pending_msgs_tail->pos>0)
1363 remove_http_message(ps, ps->pending_msgs_tail);
1371 while ( (running > 0) );
1373 handles_last_run = running;
1375 while (mret == CURLM_CALL_MULTI_PERFORM);
1376 send_schedule(plugin, cls);
1381 * Function setting up file descriptors and scheduling task to run
1382 * @param ses session to send data to
1383 * @return bytes sent to peer
1385 static size_t send_schedule(void *cls, struct Session* ses )
1387 struct Plugin *plugin = cls;
1392 struct GNUNET_NETWORK_FDSet *grs;
1393 struct GNUNET_NETWORK_FDSet *gws;
1397 GNUNET_assert(cls !=NULL);
1402 mret = curl_multi_fdset (plugin->multi_handle, &rs, &ws, &es, &max);
1403 if (mret != CURLM_OK)
1405 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1406 _("%s failed at %s:%d: `%s'\n"),
1407 "curl_multi_fdset", __FILE__, __LINE__,
1408 curl_multi_strerror (mret));
1411 mret = curl_multi_timeout (plugin->multi_handle, &to);
1412 if (mret != CURLM_OK)
1414 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1415 _("%s failed at %s:%d: `%s'\n"),
1416 "curl_multi_timeout", __FILE__, __LINE__,
1417 curl_multi_strerror (mret));
1421 grs = GNUNET_NETWORK_fdset_create ();
1422 gws = GNUNET_NETWORK_fdset_create ();
1423 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1424 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1425 plugin->http_server_task_send = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1426 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1427 GNUNET_SCHEDULER_NO_TASK,
1428 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
1433 GNUNET_NETWORK_fdset_destroy (gws);
1434 GNUNET_NETWORK_fdset_destroy (grs);
1436 /* FIXME: return bytes REALLY sent */
1442 * Function that can be used by the transport service to transmit
1443 * a message using the plugin. Note that in the case of a
1444 * peer disconnecting, the continuation MUST be called
1445 * prior to the disconnect notification itself. This function
1446 * will be called with this peer's HELLO message to initiate
1447 * a fresh connection to another peer.
1449 * @param cls closure
1450 * @param target who should receive this message
1451 * @param msgbuf the message to transmit
1452 * @param msgbuf_size number of bytes in 'msgbuf'
1453 * @param priority how important is the message (most plugins will
1454 * ignore message priority and just FIFO)
1455 * @param timeout how long to wait at most for the transmission (does not
1456 * require plugins to discard the message after the timeout,
1457 * just advisory for the desired delay; most plugins will ignore
1459 * @param session which session must be used (or NULL for "any")
1460 * @param addr the address to use (can be NULL if the plugin
1461 * is "on its own" (i.e. re-use existing TCP connection))
1462 * @param addrlen length of the address in bytes
1463 * @param force_address GNUNET_YES if the plugin MUST use the given address,
1464 * GNUNET_NO means the plugin may use any other address and
1465 * GNUNET_SYSERR means that only reliable existing
1466 * bi-directional connections should be used (regardless
1468 * @param cont continuation to call once the message has
1469 * been transmitted (or if the transport is ready
1470 * for the next transmission call; or if the
1471 * peer disconnected...); can be NULL
1472 * @param cont_cls closure for cont
1473 * @return number of bytes used (on the physical network, with overheads);
1474 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1475 * and does NOT mean that the message was not transmitted (DV)
1478 http_plugin_send (void *cls,
1479 const struct GNUNET_PeerIdentity *target,
1482 unsigned int priority,
1483 struct GNUNET_TIME_Relative to,
1484 struct Session *session,
1488 GNUNET_TRANSPORT_TransmitContinuation cont,
1491 struct Plugin *plugin = cls;
1492 struct HTTP_Message *msg;
1494 struct HTTP_PeerContext * pc;
1495 struct Session * ps = NULL;
1497 GNUNET_assert(cls !=NULL);
1499 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1503 pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
1504 pc->plugin = plugin;
1505 pc->session_id_counter=1;
1506 memcpy(&pc->identity, target, sizeof(struct GNUNET_PeerIdentity));
1507 GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1509 if ((addr!=NULL) && (addrlen != 0))
1511 ps = get_Session(plugin, pc, addr, addrlen);
1514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Found existing connection to peer %s with given address, using %X\n", GNUNET_i2s(target), ps);
1516 /* session not existing, address not forced -> looking for other session */
1517 if ((ps==NULL) && ((force_address == GNUNET_NO) || (force_address == GNUNET_SYSERR)))
1519 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));
1520 /* Choosing different session to peer when possible */
1521 struct Session * tmp = pc->head;
1524 if ((tmp->recv_connected) && (tmp->send_connected) && (tmp->recv_force_disconnect==GNUNET_NO) && (tmp->send_force_disconnect==GNUNET_NO))
1531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, selected connection %X\n", GNUNET_i2s(target),ps);
1533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection to peer %s, no connection found\n", GNUNET_i2s(target));
1536 /* session not existing, but address forced -> creating new session */
1537 if ((ps==NULL) || ((ps==NULL) && (force_address == GNUNET_YES)))
1539 if ((addr!=NULL) && (addrlen!=0))
1541 if (force_address == GNUNET_YES)
1542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection & forced address: creating new connection to peer %s\n", GNUNET_i2s(target));
1543 if (force_address != GNUNET_YES)
1544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection: creating new connection to peer %s\n", GNUNET_i2s(target));
1546 ps = GNUNET_malloc(sizeof (struct Session));
1547 ps->addr = GNUNET_malloc(addrlen);
1548 memcpy(ps->addr,addr,addrlen);
1549 ps->addrlen = addrlen;
1550 ps->direction=OUTBOUND;
1551 ps->recv_connected = GNUNET_NO;
1552 ps->recv_force_disconnect = GNUNET_NO;
1553 ps->send_connected = GNUNET_NO;
1554 ps->send_force_disconnect = GNUNET_NO;
1555 ps->pending_msgs_head = NULL;
1556 ps->pending_msgs_tail = NULL;
1558 ps->session_id = pc->session_id_counter;
1559 pc->session_id_counter++;
1560 ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
1561 GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
1565 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));
1570 char * force = GNUNET_malloc(30);
1571 if (force_address == GNUNET_YES)
1572 strcpy(force,"forced addr.");
1573 if (force_address == GNUNET_NO)
1574 strcpy(force,"any addr.");
1575 if (force_address == GNUNET_SYSERR)
1576 strcpy(force,"reliable bi-direc. address addr.");
1577 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport tells me to send %u bytes to `%s' %s (%s), session: %X\n",
1579 GNUNET_i2s(&pc->identity),
1581 http_plugin_address_to_string(NULL, addr, addrlen),
1586 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
1588 msg->size = msgbuf_size;
1590 msg->buf = (char *) &msg[1];
1591 msg->transmit_cont = cont;
1592 msg->transmit_cont_cls = cont_cls;
1593 memcpy (msg->buf,msgbuf, msgbuf_size);
1594 GNUNET_CONTAINER_DLL_insert(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
1596 return send_check_connections (plugin, ps);
1602 * Function that can be used to force the plugin to disconnect
1603 * from the given peer and cancel all previous transmissions
1604 * (and their continuationc).
1606 * @param cls closure
1607 * @param target peer from which to disconnect
1610 http_plugin_disconnect (void *cls,
1611 const struct GNUNET_PeerIdentity *target)
1614 struct Plugin *plugin = cls;
1615 struct HTTP_PeerContext *pc = NULL;
1616 struct Session *ps = NULL;
1618 pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1626 if (ps->direction==OUTBOUND)
1628 if (ps->send_endpoint!=NULL)
1630 curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1631 curl_easy_cleanup(ps->send_endpoint);
1632 ps->send_endpoint=NULL;
1633 ps->send_force_disconnect = GNUNET_YES;
1635 if (ps->recv_endpoint!=NULL)
1637 curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1638 curl_easy_cleanup(ps->recv_endpoint);
1639 ps->recv_endpoint=NULL;
1640 ps->recv_force_disconnect = GNUNET_YES;
1643 if (ps->direction==INBOUND)
1645 ps->recv_force_disconnect = GNUNET_YES;
1646 ps->send_force_disconnect = GNUNET_YES;
1648 while (ps->pending_msgs_head!=NULL)
1650 remove_http_message(ps, ps->pending_msgs_head);
1652 ps->recv_connected = GNUNET_NO;
1653 ps->recv_active = GNUNET_NO;
1654 ps->send_connected = GNUNET_NO;
1655 ps->send_active = GNUNET_NO;
1658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"All connections to peer `%s' terminated\n", GNUNET_i2s(target));
1663 * Convert the transports address to a nice, human-readable
1666 * @param cls closure
1667 * @param type name of the transport that generated the address
1668 * @param addr one of the addresses of the host, NULL for the last address
1669 * the specific address format depends on the transport
1670 * @param addrlen length of the address
1671 * @param numeric should (IP) addresses be displayed in numeric form?
1672 * @param timeout after how long should we give up?
1673 * @param asc function to call on each string
1674 * @param asc_cls closure for asc
1677 http_plugin_address_pretty_printer (void *cls,
1682 struct GNUNET_TIME_Relative timeout,
1683 GNUNET_TRANSPORT_AddressStringCallback
1686 const struct IPv4HttpAddress *t4;
1687 const struct IPv6HttpAddress *t6;
1688 struct sockaddr_in a4;
1689 struct sockaddr_in6 a6;
1695 GNUNET_assert(cls !=NULL);
1696 if (addrlen == sizeof (struct IPv6HttpAddress))
1698 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1700 a6.sin6_addr = t6->ipv6_addr;
1701 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1702 port = ntohs(t6->u6_port);
1704 else if (addrlen == sizeof (struct IPv4HttpAddress))
1706 address = GNUNET_malloc (INET_ADDRSTRLEN);
1708 a4.sin_addr.s_addr = t4->ipv4_addr;
1709 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1710 port = ntohs(t4->u_port);
1714 /* invalid address */
1715 GNUNET_break_op (0);
1716 asc (asc_cls, NULL);
1719 res = GNUNET_asprintf(&ret,"http://%s:%u/",address,port);
1720 GNUNET_free (address);
1721 GNUNET_assert(res != 0);
1729 * Another peer has suggested an address for this
1730 * peer and transport plugin. Check that this could be a valid
1731 * address. If so, consider adding it to the list
1734 * @param cls closure
1735 * @param addr pointer to the address
1736 * @param addrlen length of addr
1737 * @return GNUNET_OK if this is a plausible address for this peer
1741 http_plugin_address_suggested (void *cls,
1742 const void *addr, size_t addrlen)
1744 struct Plugin *plugin = cls;
1745 struct IPv4HttpAddress *v4;
1746 struct IPv6HttpAddress *v6;
1749 GNUNET_assert(cls !=NULL);
1750 if ((addrlen != sizeof (struct IPv4HttpAddress)) &&
1751 (addrlen != sizeof (struct IPv6HttpAddress)))
1753 return GNUNET_SYSERR;
1755 if (addrlen == sizeof (struct IPv4HttpAddress))
1757 v4 = (struct IPv4HttpAddress *) addr;
1758 if (INADDR_LOOPBACK == ntohl(v4->ipv4_addr))
1760 return GNUNET_SYSERR;
1762 port = ntohs (v4->u_port);
1763 if (port != plugin->port_inbound)
1765 return GNUNET_SYSERR;
1770 v6 = (struct IPv6HttpAddress *) addr;
1771 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1773 return GNUNET_SYSERR;
1775 port = ntohs (v6->u6_port);
1776 if (port != plugin->port_inbound)
1778 return GNUNET_SYSERR;
1786 * Function called for a quick conversion of the binary address to
1787 * a numeric address. Note that the caller must not free the
1788 * address and that the next call to this function is allowed
1789 * to override the address again.
1791 * @param cls closure
1792 * @param addr binary address
1793 * @param addrlen length of the address
1794 * @return string representing the same address
1797 http_plugin_address_to_string (void *cls,
1801 const struct IPv4HttpAddress *t4;
1802 const struct IPv6HttpAddress *t6;
1803 struct sockaddr_in a4;
1804 struct sockaddr_in6 a6;
1810 if (addrlen == sizeof (struct IPv6HttpAddress))
1812 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1814 a6.sin6_addr = t6->ipv6_addr;
1815 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1816 port = ntohs(t6->u6_port);
1818 else if (addrlen == sizeof (struct IPv4HttpAddress))
1820 address = GNUNET_malloc (INET_ADDRSTRLEN);
1822 a4.sin_addr.s_addr = t4->ipv4_addr;
1823 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1824 port = ntohs(t4->u_port);
1828 /* invalid address */
1831 res = GNUNET_asprintf(&ret,"%s:%u",address,port);
1832 GNUNET_free (address);
1833 GNUNET_assert(res != 0);
1838 * Add the IP of our network interface to the list of
1839 * our external IP addresses.
1841 * @param cls the 'struct Plugin*'
1842 * @param name name of the interface
1843 * @param isDefault do we think this may be our default interface
1844 * @param addr address of the interface
1845 * @param addrlen number of bytes in addr
1846 * @return GNUNET_OK to continue iterating
1849 process_interfaces (void *cls,
1852 const struct sockaddr *addr, socklen_t addrlen)
1854 struct Plugin *plugin = cls;
1855 struct IPv4HttpAddress * t4;
1856 struct IPv6HttpAddress * t6;
1859 GNUNET_assert(cls !=NULL);
1860 af = addr->sa_family;
1863 t4 = GNUNET_malloc(sizeof(struct IPv4HttpAddress));
1864 if (INADDR_LOOPBACK == ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr))
1866 /* skip loopback addresses */
1869 t4->ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1870 t4->u_port = htons (plugin->port_inbound);
1871 plugin->env->notify_address(plugin->env->cls,"http",t4, sizeof (struct IPv4HttpAddress), GNUNET_TIME_UNIT_FOREVER_REL);
1874 else if (af == AF_INET6)
1876 t6 = GNUNET_malloc(sizeof(struct IPv6HttpAddress));
1877 if (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr))
1879 /* skip link local addresses */
1882 if (IN6_IS_ADDR_LOOPBACK (&((struct sockaddr_in6 *) addr)->sin6_addr))
1884 /* skip loopback addresses */
1887 memcpy (&t6->ipv6_addr,
1888 &((struct sockaddr_in6 *) addr)->sin6_addr,
1889 sizeof (struct in6_addr));
1890 t6->u6_port = htons (plugin->port_inbound);
1891 plugin->env->notify_address(plugin->env->cls,"http",t6,sizeof (struct IPv6HttpAddress) , GNUNET_TIME_UNIT_FOREVER_REL);
1896 int peer_context_Iterator (void *cls, const GNUNET_HashCode *key, void *value)
1898 struct HTTP_PeerContext * pc = value;
1899 struct Session * ps = pc->head;
1900 struct Session * tmp = NULL;
1901 struct HTTP_Message * msg = NULL;
1902 struct HTTP_Message * msg_tmp = NULL;
1904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing context for peer `%s'\n",GNUNET_i2s(&pc->identity));
1910 GNUNET_free(ps->addr);
1911 GNUNET_free(ps->url);
1912 if (ps->msgtok != NULL)
1913 GNUNET_SERVER_mst_destroy (ps->msgtok);
1915 msg = ps->pending_msgs_head;
1918 msg_tmp = msg->next;
1922 if (ps->direction==OUTBOUND)
1924 if (ps->send_endpoint!=NULL)
1925 curl_easy_cleanup(ps->send_endpoint);
1926 if (ps->recv_endpoint!=NULL)
1927 curl_easy_cleanup(ps->recv_endpoint);
1939 * Exit point from the plugin.
1942 libgnunet_plugin_transport_http_done (void *cls)
1944 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1945 struct Plugin *plugin = api->cls;
1948 GNUNET_assert(cls !=NULL);
1950 if ( plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1952 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
1953 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
1956 if ( plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1958 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
1959 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1962 if ( plugin->http_server_task_send != GNUNET_SCHEDULER_NO_TASK)
1964 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_send);
1965 plugin->http_server_task_send = GNUNET_SCHEDULER_NO_TASK;
1968 if (plugin->http_server_daemon_v4 != NULL)
1970 MHD_stop_daemon (plugin->http_server_daemon_v4);
1971 plugin->http_server_daemon_v4 = NULL;
1973 if (plugin->http_server_daemon_v6 != NULL)
1975 MHD_stop_daemon (plugin->http_server_daemon_v6);
1976 plugin->http_server_daemon_v6 = NULL;
1979 /* free all peer information */
1980 GNUNET_CONTAINER_multihashmap_iterate (plugin->peers,
1981 &peer_context_Iterator,
1983 GNUNET_CONTAINER_multihashmap_destroy (plugin->peers);
1985 mret = curl_multi_cleanup(plugin->multi_handle);
1986 if ( CURLM_OK != mret)
1987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed");
1989 GNUNET_free (plugin);
1991 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unload http plugin complete...\n");
1997 * Entry point for the plugin.
2000 libgnunet_plugin_transport_http_init (void *cls)
2002 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2003 struct Plugin *plugin;
2004 struct GNUNET_TRANSPORT_PluginFunctions *api;
2005 struct GNUNET_TIME_Relative gn_timeout;
2006 long long unsigned int port;
2008 GNUNET_assert(cls !=NULL);
2009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
2011 plugin = GNUNET_malloc (sizeof (struct Plugin));
2013 plugin->peers = NULL;
2015 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2017 api->send = &http_plugin_send;
2018 api->disconnect = &http_plugin_disconnect;
2019 api->address_pretty_printer = &http_plugin_address_pretty_printer;
2020 api->check_address = &http_plugin_address_suggested;
2021 api->address_to_string = &http_plugin_address_to_string;
2023 /* Hashing our identity to use it in URLs */
2024 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &plugin->my_ascii_hash_ident);
2026 /* Reading port number from config file */
2028 GNUNET_CONFIGURATION_get_value_number (env->cfg,
2034 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2037 ("Require valid port number for transport plugin `%s' in configuration!\n"),
2039 libgnunet_plugin_transport_http_done (api);
2042 GNUNET_assert ((port > 0) && (port <= 65535));
2043 plugin->port_inbound = port;
2044 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
2045 if ((plugin->http_server_daemon_v4 == NULL) && (plugin->http_server_daemon_v6 == NULL) && (port != 0))
2047 plugin->http_server_daemon_v6 = MHD_start_daemon (MHD_USE_IPv6,
2049 &acceptPolicyCallback,
2050 plugin , &accessHandlerCallback, plugin,
2051 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
2052 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
2053 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
2054 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2055 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
2057 plugin->http_server_daemon_v4 = MHD_start_daemon (MHD_NO_FLAG,
2059 &acceptPolicyCallback,
2060 plugin , &accessHandlerCallback, plugin,
2061 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
2062 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
2063 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
2064 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2065 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
2068 if (plugin->http_server_daemon_v4 != NULL)
2069 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
2070 if (plugin->http_server_daemon_v6 != NULL)
2071 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
2073 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
2075 else if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
2079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No MHD was started, transport plugin not functional!\n");
2080 libgnunet_plugin_transport_http_done (api);
2084 /* Initializing cURL */
2085 curl_global_init(CURL_GLOBAL_ALL);
2086 plugin->multi_handle = curl_multi_init();
2088 if ( NULL == plugin->multi_handle )
2090 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2092 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
2094 libgnunet_plugin_transport_http_done (api);
2098 plugin->peers = GNUNET_CONTAINER_multihashmap_create (10);
2099 GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
2104 /* end of plugin_transport_http.c */