2 This file is part of GNUnet
3 (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_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_server_lib.h"
32 #include "gnunet_service_lib.h"
33 #include "gnunet_statistics_service.h"
34 #include "gnunet_transport_service.h"
35 #include "gnunet_resolver_service.h"
36 #include "gnunet_server_lib.h"
37 #include "gnunet_container_lib.h"
38 #include "plugin_transport.h"
39 #include "gnunet_os_lib.h"
40 #include "microhttpd.h"
41 #include <curl/curl.h>
44 #define DEBUG_CURL GNUNET_NO
45 #define DEBUG_HTTP GNUNET_NO
46 #define HTTP_CONNECT_TIMEOUT_DBG 10
49 * Text of the response sent back after the last bytes of a PUT
50 * request have been received (just to formally obey the HTTP
53 #define HTTP_PUT_RESPONSE "Thank you!"
56 * After how long do we expire an address that we
57 * learned from another peer if it is not reconfirmed
60 #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
63 * Page returned if request invalid
65 #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>"
68 * Timeout for a http connect
70 #define HTTP_CONNECT_TIMEOUT 30
73 * Network format for IPv4 addresses.
75 struct IPv4HttpAddress
78 * IPv4 address, in network byte order.
80 uint32_t ipv4_addr GNUNET_PACKED;
83 * Port number, in network byte order.
85 uint16_t u_port GNUNET_PACKED;
91 * Network format for IPv6 addresses.
93 struct IPv6HttpAddress
98 struct in6_addr ipv6_addr GNUNET_PACKED;
101 * Port number, in network byte order.
103 uint16_t u6_port GNUNET_PACKED;
109 * Message to send using http
114 * next pointer for double linked list
116 struct HTTP_Message * next;
119 * previous pointer for double linked list
121 struct HTTP_Message * prev;
124 * buffer containing data to send
129 * amount of data already sent
139 * Continuation function to call once the transmission buffer
140 * has again space available. NULL if there is no
141 * continuation to call.
143 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
146 * Closure for transmit_cont.
148 void *transmit_cont_cls;
152 struct HTTP_Connection_out
154 struct HTTP_Connection_out * next;
156 struct HTTP_Connection_out * prev;
161 struct HTTP_Message * pending_msgs_head;
162 struct HTTP_Message * pending_msgs_tail;
165 unsigned int put_connected;
166 unsigned int put_send_paused;
168 unsigned int get_connected;
171 * curl handle for sending data using HTTP/PUT
174 CURL *put_curl_handle;
177 * curl handle for recieving data using HTTP/GET transmission
180 CURL *get_curl_handle;
182 struct Session * session;
185 struct HTTP_Connection_in
187 struct HTTP_Connection_in * next;
189 struct HTTP_Connection_in * prev;
194 unsigned int connected;
195 unsigned int send_paused;
197 struct GNUNET_SERVER_MessageStreamTokenizer * msgtok;
199 struct Session * session;
202 * Is there a HTTP/PUT in progress?
204 int is_put_in_progress;
207 * Is the http request invalid?
214 * Session handle for connections.
222 struct SessionHeader header;
225 * Stored in a linked list.
227 struct Session *next;
230 * Pointer to the global plugin struct.
232 struct Plugin *plugin;
235 * To whom are we talking to (set to our identity
236 * if we are still waiting for the welcome message)
238 struct GNUNET_PeerIdentity identity;
241 * Sender's ip address to distinguish between incoming connections
252 * Did we initiate the connection (GNUNET_YES) or the other peer (GNUNET_NO)?
257 * At what time did we reset last_received last?
259 struct GNUNET_TIME_Absolute last_quota_update;
262 * How many bytes have we received since the "last_quota_update"
265 uint64_t last_received;
268 * Number of bytes per ms that this peer is allowed
276 struct GNUNET_CRYPTO_HashAsciiEncoded hash;
279 * curl handle for outbound transmissions
284 * Message tokenizer for incoming data
286 //struct GNUNET_SERVER_MessageStreamTokenizer * msgtok;
288 struct HTTP_Connection_out *outbound_connections_head;
289 struct HTTP_Connection_out *outbound_connections_tail;
291 struct HTTP_Connection_in *inbound_connections_head;
292 struct HTTP_Connection_in *inbound_connections_tail;
296 * Encapsulation of all of the state of the plugin.
303 struct GNUNET_TRANSPORT_PluginEnvironment *env;
305 unsigned int port_inbound;
308 * Hashmap for all existing sessions.
310 struct GNUNET_CONTAINER_MultiHashMap *sessions;
313 * Daemon for listening for new IPv4 connections.
315 struct MHD_Daemon *http_server_daemon_v4;
318 * Daemon for listening for new IPv6connections.
320 struct MHD_Daemon *http_server_daemon_v6;
323 * Our primary task for http daemon handling IPv4 connections
325 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v4;
328 * Our primary task for http daemon handling IPv6 connections
330 GNUNET_SCHEDULER_TaskIdentifier http_server_task_v6;
333 * The task sending data
335 GNUNET_SCHEDULER_TaskIdentifier http_server_task_send;
340 CURLM * multi_handle;
343 * Our ASCII encoded, hashed peer identity
344 * This string is used to distinguish between connections and is added to the urls
346 struct GNUNET_CRYPTO_HashAsciiEncoded my_ascii_hash_ident;
351 * Function called for a quick conversion of the binary address to
352 * a numeric address. Note that the caller must not free the
353 * address and that the next call to this function is allowed
354 * to override the address again.
357 * @param addr binary address
358 * @param addrlen length of the address
359 * @return string representing the same address
362 http_plugin_address_to_string (void *cls,
367 * Create a new session
368 * @param cls plugin as closure
369 * @param addr_in address the peer is using inbound
370 * @param addr_len_in address length
371 * @param addr_out address the peer is using outbound
372 * @param addr_len_out address length
373 * @param peer identity
374 * @return created session object
376 static struct Session *
377 create_session (void * cls,
382 const struct GNUNET_PeerIdentity *peer)
384 struct Plugin *plugin = cls;
385 struct Session * cs = GNUNET_malloc ( sizeof( struct Session) );
387 GNUNET_assert(cls !=NULL);
390 cs->addr_in = GNUNET_malloc (addrlen_in);
391 cs->addr_in_len = addrlen_in;
392 memcpy(cs->addr_in,addr_in,addrlen_in);
395 if (addrlen_out != 0)
397 cs->addr_out = GNUNET_malloc (addrlen_out);
398 cs->addr_out_len = addrlen_out;
399 memcpy(cs->addr_out,addr_out,addrlen_out);
402 memcpy(&cs->identity, peer, sizeof (struct GNUNET_PeerIdentity));
403 GNUNET_CRYPTO_hash_to_enc(&cs->identity.hashPubKey,&(cs->hash));
404 cs->outbound_connections_head = NULL;
405 cs->outbound_connections_tail = NULL;
410 * Check if session for this peer is already existing, otherwise create it
411 * @param cls the plugin used
412 * @param p peer to get session for
413 * @return session found or created
415 static struct Session * session_get (void * cls, const struct GNUNET_PeerIdentity *p)
417 struct Plugin *plugin = cls;
421 cs = GNUNET_CONTAINER_multihashmap_get (plugin->sessions, &p->hashPubKey);
424 cs = create_session(plugin, NULL, 0, NULL, 0, p);
425 res = GNUNET_CONTAINER_multihashmap_put ( plugin->sessions,
426 &cs->identity.hashPubKey,
428 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
429 if (res == GNUNET_OK)
430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
431 "New Session `%s' inserted\n", GNUNET_i2s(p));
436 static char * create_url(void * cls, const void * addr, size_t addrlen)
438 struct Plugin *plugin = cls;
441 GNUNET_assert ((addr!=NULL) && (addrlen != 0));
442 GNUNET_asprintf(&url,
444 http_plugin_address_to_string(NULL, addr, addrlen),
445 (char *) (&plugin->my_ascii_hash_ident));
451 * Check if session already knows this address for a outbound connection to this peer
452 * If address not in session, add it to the session
453 * @param cls the plugin used
454 * @param cs the session
455 * @param addr address
456 * @param addr_len address length
457 * @return the found or created address
459 static struct HTTP_Connection_out * session_check_outbound_address (void * cls, struct Session *cs, const void * addr, size_t addr_len)
461 struct Plugin *plugin = cls;
462 struct HTTP_Connection_out * cc = cs->outbound_connections_head;
463 struct HTTP_Connection_out * con = NULL;
465 GNUNET_assert((addr_len == sizeof (struct IPv4HttpAddress)) || (addr_len == sizeof (struct IPv6HttpAddress)));
469 if (addr_len == cc->addrlen)
471 if (0 == memcmp(cc->addr, addr, addr_len))
482 con = GNUNET_malloc(sizeof(struct HTTP_Connection_out) + addr_len);
483 con->addrlen = addr_len;
485 con->url=create_url(plugin, addr, addr_len);
486 con->put_curl_handle = NULL;
487 con->put_connected = GNUNET_NO;
488 con->get_curl_handle = NULL;
489 con->get_connected = GNUNET_NO;
491 memcpy(con->addr, addr, addr_len);
492 GNUNET_CONTAINER_DLL_insert(cs->outbound_connections_head,cs->outbound_connections_tail,con);
493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Created new connection %X to peer `%s'\n",con,GNUNET_i2s(&cs->identity));
500 * Check if session already knows this address for a inbound connection to this peer
501 * If address not in session, add it to the session
502 * @param cls not needed, can be NULL
503 * @param cs the session
504 * @param addr address
505 * @param addr_len address length
506 * @return the found or created address
508 static struct HTTP_Connection_in * session_check_inbound_address (void * cls, struct Session *cs, const void * addr, size_t addr_len)
510 struct HTTP_Connection_in * cc = cs->inbound_connections_head;
511 struct HTTP_Connection_in * con = NULL;
513 GNUNET_assert((addr_len == sizeof (struct IPv4HttpAddress)) || (addr_len == sizeof (struct IPv6HttpAddress)));
517 if (addr_len == cc->addrlen)
519 if (0 == memcmp(cc->addr, addr, addr_len))
531 con = GNUNET_malloc(sizeof(struct HTTP_Connection_in) + addr_len);
532 con->addrlen = addr_len;
534 con->connected = GNUNET_NO;
536 memcpy(con->addr, addr, addr_len);
537 GNUNET_CONTAINER_DLL_insert(cs->inbound_connections_head,cs->inbound_connections_tail,con);
540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X for inbound address %s (%s) was found\n",
542 GNUNET_i2s(&cs->identity),
543 http_plugin_address_to_string(NULL,con->addr,con->addrlen));
549 * Callback called by MHD when a connection is terminated
551 static void requestCompletedCallback (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
553 struct HTTP_Connection_in * con;
555 con = *httpSessionCache;
558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection from peer `%s' was terminated\n",GNUNET_i2s(&con->session->identity));
559 /* session set to inactive */
560 con->is_put_in_progress = GNUNET_NO;
561 con->is_bad_request = GNUNET_NO;
564 static void messageTokenizerCallback (void *cls,
566 const struct GNUNET_MessageHeader *message)
568 struct HTTP_Connection_in * con = cls;
569 GNUNET_assert(con != NULL);
571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
572 "Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
573 ntohs(message->type),
574 ntohs(message->size),
575 GNUNET_i2s(&(con->session->identity)),http_plugin_address_to_string(NULL,con->addr,con->addrlen));
577 con->session->plugin->env->receive (con->session->plugin->env->cls,
578 &con->session->identity,
579 message, 1, con->session,
585 * Check if ip is allowed to connect.
588 acceptPolicyCallback (void *cls,
589 const struct sockaddr *addr, socklen_t addr_len)
592 struct Plugin *plugin = cls;
594 /* Every connection is accepted, nothing more to do here */
598 int server_read_callback (void *cls, uint64_t pos, char *buf, int max)
601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "server_read_callback\n");
606 * Process GET or PUT request received via MHD. For
607 * GET, queue response that will send back our pending
608 * messages. For PUT, process incoming data and send
609 * to GNUnet core. In either case, check if a session
610 * already exists and create a new one if not.
613 accessHandlerCallback (void *cls,
614 struct MHD_Connection *mhd_connection,
618 const char *upload_data,
619 size_t * upload_data_size, void **httpSessionCache)
621 struct Plugin *plugin = cls;
622 struct MHD_Response *response;
624 struct HTTP_Connection_in * con;
625 const union MHD_ConnectionInfo * conn_info;
626 struct sockaddr_in *addrin;
627 struct sockaddr_in6 *addrin6;
628 char address[INET6_ADDRSTRLEN+14];
629 struct GNUNET_PeerIdentity pi_in;
631 int send_error_to_client;
632 struct IPv4HttpAddress ipv4addr;
633 struct IPv6HttpAddress ipv6addr;
635 GNUNET_assert(cls !=NULL);
636 send_error_to_client = GNUNET_NO;
637 if (NULL == *httpSessionCache)
639 /* check url for peer identity , if invalid send HTTP 404*/
640 res = GNUNET_CRYPTO_hash_from_string ( &url[1], &(pi_in.hashPubKey));
641 if ( GNUNET_SYSERR == res )
643 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
644 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
645 MHD_destroy_response (response);
647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, sent HTTP 1.1/404\n");
649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, could not send error\n");
655 con = *httpSessionCache;
659 /* Is it a PUT or a GET request */
660 if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
662 if (NULL == *httpSessionCache)
664 /* get session for peer identity */
665 cs = session_get (plugin ,&pi_in);
667 conn_info = MHD_get_connection_info(mhd_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
668 /* Incoming IPv4 connection */
669 if ( AF_INET == conn_info->client_addr->sin_family)
671 addrin = conn_info->client_addr;
672 inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
673 memcpy(&ipv4addr.ipv4_addr,&(addrin->sin_addr),sizeof(struct in_addr));
674 ipv4addr.u_port = addrin->sin_port;
675 con = session_check_inbound_address (plugin, cs, (const void *) &ipv4addr, sizeof (struct IPv4HttpAddress));
677 /* Incoming IPv6 connection */
678 if ( AF_INET6 == conn_info->client_addr->sin_family)
680 addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
681 inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
682 memcpy(&ipv6addr.ipv6_addr,&(addrin6->sin6_addr),sizeof(struct in6_addr));
683 ipv6addr.u6_port = addrin6->sin6_port;
684 con = session_check_inbound_address (plugin, cs, &ipv6addr, sizeof (struct IPv6HttpAddress));
686 /* Set closure and update current session*/
688 *httpSessionCache = con;
689 if (con->msgtok==NULL)
690 con->msgtok = GNUNET_SERVER_mst_create (GNUNET_SERVER_MAX_MESSAGE_SIZE - 1, &messageTokenizerCallback, con);
692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"HTTP Daemon has new an incoming `%s' request from peer `%s' (`%s')\n",
694 GNUNET_i2s(&cs->identity),
695 http_plugin_address_to_string(NULL, con->addr, con->addrlen));
698 if ((*upload_data_size == 0) && (con->is_put_in_progress==GNUNET_NO))
700 con->is_put_in_progress = GNUNET_YES;
704 /* Transmission of all data complete */
705 if ((*upload_data_size == 0) && (con->is_put_in_progress == GNUNET_YES))
707 response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
708 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Sent HTTP/1.1: 200 OK as PUT Response\n",HTTP_PUT_RESPONSE, strlen (HTTP_PUT_RESPONSE), res );
710 MHD_destroy_response (response);
713 con->is_put_in_progress = GNUNET_NO;
714 con->is_bad_request = GNUNET_NO;
719 if ((*upload_data_size > 0) && (con->is_put_in_progress == GNUNET_YES))
721 res = GNUNET_SERVER_mst_receive(con->msgtok, con, upload_data,*upload_data_size, GNUNET_NO, GNUNET_NO);
722 (*upload_data_size) = 0;
728 if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Got GET Request\n");
731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"URL: `%s'\n",url);
733 /* check url for peer identity , if invalid send HTTP 404*/
734 res = GNUNET_CRYPTO_hash_from_string ( &url[1], &(pi_in.hashPubKey));
736 if ( GNUNET_SYSERR == res )
738 response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
739 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
740 MHD_destroy_response (response);
742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, sent HTTP 1.1/404\n");
744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, could not send error\n");
748 response = MHD_create_response_from_callback(-1,32 * 1024, &server_read_callback, cs, NULL);
749 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
750 MHD_destroy_response (response);
760 * Call MHD to process pending ipv4 requests and then go back
761 * and schedule the next run.
763 static void http_server_daemon_v4_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
765 * Call MHD to process pending ipv6 requests and then go back
766 * and schedule the next run.
768 static void http_server_daemon_v6_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
771 * Function that queries MHD's select sets and
772 * starts the task waiting for them.
774 static GNUNET_SCHEDULER_TaskIdentifier
775 http_server_daemon_prepare (void * cls, struct MHD_Daemon *daemon_handle)
777 struct Plugin *plugin = cls;
778 GNUNET_SCHEDULER_TaskIdentifier ret;
782 struct GNUNET_NETWORK_FDSet *wrs;
783 struct GNUNET_NETWORK_FDSet *wws;
784 struct GNUNET_NETWORK_FDSet *wes;
786 unsigned long long timeout;
788 struct GNUNET_TIME_Relative tv;
790 GNUNET_assert(cls !=NULL);
791 ret = GNUNET_SCHEDULER_NO_TASK;
795 wrs = GNUNET_NETWORK_fdset_create ();
796 wes = GNUNET_NETWORK_fdset_create ();
797 wws = GNUNET_NETWORK_fdset_create ();
799 GNUNET_assert (MHD_YES ==
800 MHD_get_fdset (daemon_handle,
805 haveto = MHD_get_timeout (daemon_handle, &timeout);
806 if (haveto == MHD_YES)
807 tv.value = (uint64_t) timeout;
809 tv = GNUNET_TIME_UNIT_FOREVER_REL;
810 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
811 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
812 GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
813 if (daemon_handle == plugin->http_server_daemon_v4)
815 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
816 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
817 GNUNET_SCHEDULER_NO_TASK,
821 &http_server_daemon_v4_run,
824 if (daemon_handle == plugin->http_server_daemon_v6)
826 ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
827 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
828 GNUNET_SCHEDULER_NO_TASK,
832 &http_server_daemon_v6_run,
835 GNUNET_NETWORK_fdset_destroy (wrs);
836 GNUNET_NETWORK_fdset_destroy (wws);
837 GNUNET_NETWORK_fdset_destroy (wes);
842 * Call MHD to process pending requests and then go back
843 * and schedule the next run.
845 static void http_server_daemon_v4_run (void *cls,
846 const struct GNUNET_SCHEDULER_TaskContext *tc)
848 struct Plugin *plugin = cls;
850 GNUNET_assert(cls !=NULL);
851 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
852 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
854 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
857 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v4));
858 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
864 * Call MHD to process pending requests and then go back
865 * and schedule the next run.
867 static void http_server_daemon_v6_run (void *cls,
868 const struct GNUNET_SCHEDULER_TaskContext *tc)
870 struct Plugin *plugin = cls;
872 GNUNET_assert(cls !=NULL);
873 if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
874 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
876 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
879 GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v6));
880 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
885 * Removes a message from the linked list of messages
886 * @param con connection to remove message from
887 * @param msg message to remove
888 * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
891 static int remove_http_message(struct HTTP_Connection_out * con, struct HTTP_Message * msg)
893 GNUNET_CONTAINER_DLL_remove(con->pending_msgs_head,con->pending_msgs_tail,msg);
899 static size_t header_function( void *ptr, size_t size, size_t nmemb, void *stream)
902 size_t len = size * nmemb;
905 if ((size * nmemb) < SIZE_MAX)
906 tmp = GNUNET_malloc (len+1);
908 if ((tmp != NULL) && (len > 0))
913 if (tmp[len-2] == 13)
917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Header: `%s'\n",tmp);
927 * Callback method used with libcurl
928 * Method is called when libcurl needs to read data during sending
929 * @param stream pointer where to write data
930 * @param size size of an individual element
931 * @param nmemb count of elements that can be written to the buffer
932 * @param ptr source pointer, passed to the libcurl handle
933 * @return bytes written to stream
935 static size_t send_read_callback(void *stream, size_t size, size_t nmemb, void *ptr)
937 struct HTTP_Connection_out * con = ptr;
938 struct HTTP_Message * msg = con->pending_msgs_tail;
942 if (con->pending_msgs_tail == NULL)
944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: No Message to send, pausing connection\n",con);
945 con->put_send_paused = GNUNET_YES;
946 return CURL_READFUNC_PAUSE;
949 msg = con->pending_msgs_tail;
951 if (msg->pos < msg->size)
953 /* data fit in buffer */
954 if ((msg->size - msg->pos) <= (size * nmemb))
956 len = (msg->size - msg->pos);
957 memcpy(stream, &msg->buf[msg->pos], len);
964 memcpy(stream, &msg->buf[msg->pos], len);
969 /* no data to send */
975 if ( msg->pos == msg->size)
977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Message with %u bytes sent, removing message from queue \n",con, msg->pos);
978 /* Calling transmit continuation */
979 if (( NULL != con->pending_msgs_tail) && (NULL != con->pending_msgs_tail->transmit_cont))
980 msg->transmit_cont (con->pending_msgs_tail->transmit_cont_cls,&(con->session)->identity,GNUNET_OK);
981 remove_http_message(con, msg);
987 * Callback method used with libcurl
988 * Method is called when libcurl needs to write data during sending
989 * @param stream pointer where to write data
990 * @param size size of an individual element
991 * @param nmemb count of elements that can be written to the buffer
992 * @param ptr destination pointer, passed to the libcurl handle
993 * @return bytes read from stream
995 static size_t send_write_callback( void *stream, size_t size, size_t nmemb, void *ptr)
999 if ((size * nmemb) < SIZE_MAX)
1000 data = GNUNET_malloc(size*nmemb +1);
1003 memcpy( data, stream, size*nmemb);
1004 data[size*nmemb] = '\0';
1007 return (size * nmemb);
1012 * Function setting up file descriptors and scheduling task to run
1013 * @param cls closure
1014 * @param ses session to send data to
1015 * @return bytes sent to peer
1017 static size_t send_schedule(void *cls, struct Session* ses );
1022 * Function setting up curl handle and selecting message to send
1024 * @param ses session to send data to
1025 * @param con connection
1026 * @return bytes sent to peer
1028 static ssize_t send_initiate (void *cls, struct Session* ses , struct HTTP_Connection_out *con)
1030 struct Plugin *plugin = cls;
1033 struct HTTP_Message * msg;
1034 struct GNUNET_TIME_Relative timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1036 GNUNET_assert(cls !=NULL);
1038 if (con->get_connected == GNUNET_NO)
1040 if (con->get_curl_handle == NULL)
1041 con->get_curl_handle = curl_easy_init();
1044 curl_easy_setopt(con->get_curl_handle, CURLOPT_VERBOSE, 1L);
1046 curl_easy_setopt(con->get_curl_handle, CURLOPT_URL, con->url);
1047 //curl_easy_setopt(con->put_curl_handle, CURLOPT_PUT, 1L);
1048 curl_easy_setopt(con->get_curl_handle, CURLOPT_HEADERFUNCTION, &header_function);
1049 curl_easy_setopt(con->get_curl_handle, CURLOPT_WRITEHEADER, con);
1050 curl_easy_setopt(con->get_curl_handle, CURLOPT_READFUNCTION, send_read_callback);
1051 curl_easy_setopt(con->get_curl_handle, CURLOPT_READDATA, con);
1052 curl_easy_setopt(con->get_curl_handle, CURLOPT_WRITEFUNCTION, send_write_callback);
1053 curl_easy_setopt(con->get_curl_handle, CURLOPT_READDATA, con);
1054 curl_easy_setopt(con->get_curl_handle, CURLOPT_TIMEOUT, (long) timeout.value);
1055 curl_easy_setopt(con->get_curl_handle, CURLOPT_PRIVATE, con);
1056 curl_easy_setopt(con->get_curl_handle, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT_DBG);
1057 curl_easy_setopt(con->get_curl_handle, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1059 mret = curl_multi_add_handle(plugin->multi_handle, con->get_curl_handle);
1060 if (mret != CURLM_OK)
1062 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1063 _("%s failed at %s:%d: `%s'\n"),
1064 "curl_multi_add_handle", __FILE__, __LINE__,
1065 curl_multi_strerror (mret));
1069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection not active\n",con);
1072 /* PUT already connected, no need to initiate connection */
1073 if ((con->put_connected == GNUNET_YES) && (con->put_curl_handle != NULL))
1075 if (con->put_send_paused == GNUNET_NO)
1077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: active, enqueueing message\n",con);
1080 if (con->put_send_paused == GNUNET_YES)
1082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: paused, unpausing existing connection and enqueueing message\n",con);
1083 curl_easy_pause(con->put_curl_handle,CURLPAUSE_CONT);
1084 con->put_send_paused=GNUNET_NO;
1090 /* not connected, initiate connection */
1091 if ( NULL == con->put_curl_handle)
1092 con->put_curl_handle = curl_easy_init();
1093 GNUNET_assert (con->put_curl_handle != NULL);
1094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: not connected, initiating connection\n",con);
1096 GNUNET_assert (NULL != con->pending_msgs_tail);
1097 msg = con->pending_msgs_tail;
1100 curl_easy_setopt(con->put_curl_handle, CURLOPT_VERBOSE, 1L);
1102 curl_easy_setopt(con->put_curl_handle, CURLOPT_URL, con->url);
1103 curl_easy_setopt(con->put_curl_handle, CURLOPT_PUT, 1L);
1104 curl_easy_setopt(con->put_curl_handle, CURLOPT_HEADERFUNCTION, &header_function);
1105 curl_easy_setopt(con->put_curl_handle, CURLOPT_WRITEHEADER, con);
1106 curl_easy_setopt(con->put_curl_handle, CURLOPT_READFUNCTION, send_read_callback);
1107 curl_easy_setopt(con->put_curl_handle, CURLOPT_READDATA, con);
1108 curl_easy_setopt(con->put_curl_handle, CURLOPT_WRITEFUNCTION, send_write_callback);
1109 curl_easy_setopt(con->put_curl_handle, CURLOPT_READDATA, con);
1110 curl_easy_setopt(con->put_curl_handle, CURLOPT_TIMEOUT, (long) timeout.value);
1111 curl_easy_setopt(con->put_curl_handle, CURLOPT_PRIVATE, con);
1112 curl_easy_setopt(con->put_curl_handle, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT_DBG);
1113 curl_easy_setopt(con->put_curl_handle, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1115 mret = curl_multi_add_handle(plugin->multi_handle, con->put_curl_handle);
1116 if (mret != CURLM_OK)
1118 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1119 _("%s failed at %s:%d: `%s'\n"),
1120 "curl_multi_add_handle", __FILE__, __LINE__,
1121 curl_multi_strerror (mret));
1124 con->put_connected = GNUNET_YES;
1125 bytes_sent = send_schedule (plugin, ses);
1129 static void send_execute (void *cls,
1130 const struct GNUNET_SCHEDULER_TaskContext *tc)
1132 struct Plugin *plugin = cls;
1133 static unsigned int handles_last_run;
1135 struct CURLMsg *msg;
1137 struct HTTP_Connection_out * con = NULL;
1138 struct Session * cs = NULL;
1141 GNUNET_assert(cls !=NULL);
1142 plugin->http_server_task_send = GNUNET_SCHEDULER_NO_TASK;
1143 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1149 mret = curl_multi_perform (plugin->multi_handle, &running);
1150 if (running < handles_last_run)
1155 msg = curl_multi_info_read (plugin->multi_handle, &running);
1158 /* get session for affected curl handle */
1159 GNUNET_assert ( msg->easy_handle != NULL );
1160 curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, (char *) &con);
1161 GNUNET_assert ( con != NULL );
1163 GNUNET_assert ( cs != NULL );
1168 if ( (msg->data.result != CURLE_OK) &&
1169 (msg->data.result != CURLE_GOT_NOTHING) )
1173 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1174 _("Connection %X to peer `%s' (`%s') failed: `%s' `%s'\n"),
1176 GNUNET_i2s(&cs->identity),
1177 http_plugin_address_to_string(NULL, con->addr, con->addrlen),
1178 "curl_multi_perform",
1179 curl_easy_strerror (msg->data.result));
1180 /* sending msg failed*/
1181 con->put_connected = GNUNET_NO;
1182 curl_easy_cleanup(con->put_curl_handle);
1183 con->put_curl_handle=NULL;
1184 if (( NULL != con->pending_msgs_tail) && ( NULL != con->pending_msgs_tail->transmit_cont))
1185 con->pending_msgs_tail->transmit_cont (con->pending_msgs_tail->transmit_cont_cls,&con->session->identity,GNUNET_SYSERR);
1190 GNUNET_assert (CURLE_OK == curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &http_result));
1191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1192 "Send to peer `%s' completed with code %u\n", GNUNET_i2s(&cs->identity), http_result );
1194 curl_easy_cleanup(con->put_curl_handle);
1195 con->put_connected = GNUNET_NO;
1196 con->put_curl_handle=NULL;
1198 /* Calling transmit continuation */
1199 if (( NULL != con->pending_msgs_tail) && (NULL != con->pending_msgs_tail->transmit_cont))
1201 /* HTTP 1xx : Last message before here was informational */
1202 if ((http_result >=100) && (http_result < 200))
1203 con->pending_msgs_tail->transmit_cont (con->pending_msgs_tail->transmit_cont_cls,&cs->identity,GNUNET_OK);
1204 /* HTTP 2xx: successful operations */
1205 if ((http_result >=200) && (http_result < 300))
1206 con->pending_msgs_tail->transmit_cont (con->pending_msgs_tail->transmit_cont_cls,&cs->identity,GNUNET_OK);
1207 /* HTTP 3xx..5xx: error */
1208 if ((http_result >=300) && (http_result < 600))
1209 con->pending_msgs_tail->transmit_cont (con->pending_msgs_tail->transmit_cont_cls,&cs->identity,GNUNET_SYSERR);
1212 if (con->pending_msgs_tail != NULL)
1214 if (con->pending_msgs_tail->pos>0)
1215 remove_http_message(con, con->pending_msgs_tail);
1216 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Message could not be removed from session `%s'\n", GNUNET_i2s(&cs->identity));
1224 while ( (running > 0) );
1226 handles_last_run = running;
1228 while (mret == CURLM_CALL_MULTI_PERFORM);
1229 send_schedule(plugin, cls);
1234 * Function setting up file descriptors and scheduling task to run
1235 * @param ses session to send data to
1236 * @return bytes sent to peer
1238 static size_t send_schedule(void *cls, struct Session* ses )
1240 struct Plugin *plugin = cls;
1245 struct GNUNET_NETWORK_FDSet *grs;
1246 struct GNUNET_NETWORK_FDSet *gws;
1250 GNUNET_assert(cls !=NULL);
1255 mret = curl_multi_fdset (plugin->multi_handle, &rs, &ws, &es, &max);
1256 if (mret != CURLM_OK)
1258 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1259 _("%s failed at %s:%d: `%s'\n"),
1260 "curl_multi_fdset", __FILE__, __LINE__,
1261 curl_multi_strerror (mret));
1264 mret = curl_multi_timeout (plugin->multi_handle, &to);
1265 if (mret != CURLM_OK)
1267 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1268 _("%s failed at %s:%d: `%s'\n"),
1269 "curl_multi_timeout", __FILE__, __LINE__,
1270 curl_multi_strerror (mret));
1274 grs = GNUNET_NETWORK_fdset_create ();
1275 gws = GNUNET_NETWORK_fdset_create ();
1276 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1277 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1278 plugin->http_server_task_send = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1279 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1280 GNUNET_SCHEDULER_NO_TASK,
1281 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
1286 GNUNET_NETWORK_fdset_destroy (gws);
1287 GNUNET_NETWORK_fdset_destroy (grs);
1289 /* FIXME: return bytes REALLY sent */
1295 * Function that can be used by the transport service to transmit
1296 * a message using the plugin. Note that in the case of a
1297 * peer disconnecting, the continuation MUST be called
1298 * prior to the disconnect notification itself. This function
1299 * will be called with this peer's HELLO message to initiate
1300 * a fresh connection to another peer.
1302 * @param cls closure
1303 * @param target who should receive this message
1304 * @param msgbuf the message to transmit
1305 * @param msgbuf_size number of bytes in 'msgbuf'
1306 * @param priority how important is the message (most plugins will
1307 * ignore message priority and just FIFO)
1308 * @param timeout how long to wait at most for the transmission (does not
1309 * require plugins to discard the message after the timeout,
1310 * just advisory for the desired delay; most plugins will ignore
1312 * @param session which session must be used (or NULL for "any")
1313 * @param addr the address to use (can be NULL if the plugin
1314 * is "on its own" (i.e. re-use existing TCP connection))
1315 * @param addrlen length of the address in bytes
1316 * @param force_address GNUNET_YES if the plugin MUST use the given address,
1317 * GNUNET_NO means the plugin may use any other address and
1318 * GNUNET_SYSERR means that only reliable existing
1319 * bi-directional connections should be used (regardless
1321 * @param cont continuation to call once the message has
1322 * been transmitted (or if the transport is ready
1323 * for the next transmission call; or if the
1324 * peer disconnected...); can be NULL
1325 * @param cont_cls closure for cont
1326 * @return number of bytes used (on the physical network, with overheads);
1327 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1328 * and does NOT mean that the message was not transmitted (DV)
1331 http_plugin_send (void *cls,
1332 const struct GNUNET_PeerIdentity *target,
1335 unsigned int priority,
1336 struct GNUNET_TIME_Relative to,
1337 struct Session *session,
1341 GNUNET_TRANSPORT_TransmitContinuation cont,
1344 struct Plugin *plugin = cls;
1346 struct HTTP_Message *msg;
1347 struct HTTP_Connection_out *con;
1350 GNUNET_assert(cls !=NULL);
1351 GNUNET_assert ((addr!=NULL) && (addrlen != 0));
1353 /* get session from hashmap */
1354 cs = session_get(plugin, target);
1355 con = session_check_outbound_address(plugin, cs, addr, addrlen);
1357 char * force = GNUNET_malloc(30);
1359 if (force_address == GNUNET_YES)
1360 strcpy(force,"forced addr.");
1361 if (force_address == GNUNET_NO)
1362 strcpy(force,"any addr.");
1363 if (force_address == GNUNET_SYSERR)
1364 strcpy(force,"reliable bi-direc. address addr.");
1365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport tells me to send %u bytes to `%s' %s (%s), session: %X\n",
1367 GNUNET_i2s(&cs->identity),
1369 http_plugin_address_to_string(NULL, addr, addrlen),
1372 //GNUNET_free(force);
1374 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
1376 msg->size = msgbuf_size;
1378 msg->buf = (char *) &msg[1];
1379 msg->transmit_cont = cont;
1380 msg->transmit_cont_cls = cont_cls;
1381 memcpy (msg->buf,msgbuf, msgbuf_size);
1383 /* must use this address */
1384 if (force_address == GNUNET_YES)
1386 /* enqueue in connection message queue */
1387 GNUNET_CONTAINER_DLL_insert(con->pending_msgs_head,con->pending_msgs_tail,msg);
1389 /* can use existing connection to send */
1392 /* enqueue in connection message queue */
1393 GNUNET_CONTAINER_DLL_insert(con->pending_msgs_head,con->pending_msgs_tail,msg);
1395 return send_initiate (plugin, cs, con);
1401 * Function that can be used to force the plugin to disconnect
1402 * from the given peer and cancel all previous transmissions
1403 * (and their continuationc).
1405 * @param cls closure
1406 * @param target peer from which to disconnect
1409 http_plugin_disconnect (void *cls,
1410 const struct GNUNET_PeerIdentity *target)
1412 struct Plugin *plugin = cls;
1413 struct HTTP_Connection_out *con;
1416 /* get session from hashmap */
1417 cs = session_get(plugin, target);
1418 con = cs->outbound_connections_head;
1422 if (con->put_curl_handle!=NULL)
1423 curl_easy_cleanup(con->put_curl_handle);
1424 con->put_curl_handle=NULL;
1425 con->put_connected = GNUNET_NO;
1426 while (con->pending_msgs_head!=NULL)
1428 remove_http_message(con, con->pending_msgs_head);
1436 * Convert the transports address to a nice, human-readable
1439 * @param cls closure
1440 * @param type name of the transport that generated the address
1441 * @param addr one of the addresses of the host, NULL for the last address
1442 * the specific address format depends on the transport
1443 * @param addrlen length of the address
1444 * @param numeric should (IP) addresses be displayed in numeric form?
1445 * @param timeout after how long should we give up?
1446 * @param asc function to call on each string
1447 * @param asc_cls closure for asc
1450 http_plugin_address_pretty_printer (void *cls,
1455 struct GNUNET_TIME_Relative timeout,
1456 GNUNET_TRANSPORT_AddressStringCallback
1459 const struct IPv4HttpAddress *t4;
1460 const struct IPv6HttpAddress *t6;
1461 struct sockaddr_in a4;
1462 struct sockaddr_in6 a6;
1468 GNUNET_assert(cls !=NULL);
1469 if (addrlen == sizeof (struct IPv6HttpAddress))
1471 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1473 a6.sin6_addr = t6->ipv6_addr;
1474 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1475 port = ntohs(t6->u6_port);
1477 else if (addrlen == sizeof (struct IPv4HttpAddress))
1479 address = GNUNET_malloc (INET_ADDRSTRLEN);
1481 a4.sin_addr.s_addr = t4->ipv4_addr;
1482 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1483 port = ntohs(t4->u_port);
1487 /* invalid address */
1488 GNUNET_break_op (0);
1489 asc (asc_cls, NULL);
1492 res = GNUNET_asprintf(&ret,"http://%s:%u/",address,port);
1493 GNUNET_free (address);
1494 GNUNET_assert(res != 0);
1502 * Another peer has suggested an address for this
1503 * peer and transport plugin. Check that this could be a valid
1504 * address. If so, consider adding it to the list
1507 * @param cls closure
1508 * @param addr pointer to the address
1509 * @param addrlen length of addr
1510 * @return GNUNET_OK if this is a plausible address for this peer
1514 http_plugin_address_suggested (void *cls,
1515 const void *addr, size_t addrlen)
1517 struct Plugin *plugin = cls;
1518 struct IPv4HttpAddress *v4;
1519 struct IPv6HttpAddress *v6;
1522 GNUNET_assert(cls !=NULL);
1523 if ((addrlen != sizeof (struct IPv4HttpAddress)) &&
1524 (addrlen != sizeof (struct IPv6HttpAddress)))
1526 return GNUNET_SYSERR;
1528 if (addrlen == sizeof (struct IPv4HttpAddress))
1530 v4 = (struct IPv4HttpAddress *) addr;
1531 if (INADDR_LOOPBACK == ntohl(v4->ipv4_addr))
1533 return GNUNET_SYSERR;
1535 port = ntohs (v4->u_port);
1536 if (port != plugin->port_inbound)
1538 return GNUNET_SYSERR;
1543 v6 = (struct IPv6HttpAddress *) addr;
1544 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1546 return GNUNET_SYSERR;
1548 port = ntohs (v6->u6_port);
1549 if (port != plugin->port_inbound)
1551 return GNUNET_SYSERR;
1559 * Function called for a quick conversion of the binary address to
1560 * a numeric address. Note that the caller must not free the
1561 * address and that the next call to this function is allowed
1562 * to override the address again.
1564 * @param cls closure
1565 * @param addr binary address
1566 * @param addrlen length of the address
1567 * @return string representing the same address
1570 http_plugin_address_to_string (void *cls,
1574 const struct IPv4HttpAddress *t4;
1575 const struct IPv6HttpAddress *t6;
1576 struct sockaddr_in a4;
1577 struct sockaddr_in6 a6;
1583 if (addrlen == sizeof (struct IPv6HttpAddress))
1585 address = GNUNET_malloc (INET6_ADDRSTRLEN);
1587 a6.sin6_addr = t6->ipv6_addr;
1588 inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
1589 port = ntohs(t6->u6_port);
1591 else if (addrlen == sizeof (struct IPv4HttpAddress))
1593 address = GNUNET_malloc (INET_ADDRSTRLEN);
1595 a4.sin_addr.s_addr = t4->ipv4_addr;
1596 inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
1597 port = ntohs(t4->u_port);
1601 /* invalid address */
1604 res = GNUNET_asprintf(&ret,"%s:%u",address,port);
1605 GNUNET_free (address);
1606 GNUNET_assert(res != 0);
1611 * Add the IP of our network interface to the list of
1612 * our external IP addresses.
1614 * @param cls the 'struct Plugin*'
1615 * @param name name of the interface
1616 * @param isDefault do we think this may be our default interface
1617 * @param addr address of the interface
1618 * @param addrlen number of bytes in addr
1619 * @return GNUNET_OK to continue iterating
1622 process_interfaces (void *cls,
1625 const struct sockaddr *addr, socklen_t addrlen)
1627 struct Plugin *plugin = cls;
1628 struct IPv4HttpAddress * t4;
1629 struct IPv6HttpAddress * t6;
1632 GNUNET_assert(cls !=NULL);
1633 af = addr->sa_family;
1636 t4 = GNUNET_malloc(sizeof(struct IPv4HttpAddress));
1637 if (INADDR_LOOPBACK == ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr))
1639 /* skip loopback addresses */
1642 t4->ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1643 t4->u_port = htons (plugin->port_inbound);
1644 plugin->env->notify_address(plugin->env->cls,"http",t4, sizeof (struct IPv4HttpAddress), GNUNET_TIME_UNIT_FOREVER_REL);
1647 else if (af == AF_INET6)
1649 t6 = GNUNET_malloc(sizeof(struct IPv6HttpAddress));
1650 if (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr))
1652 /* skip link local addresses */
1655 if (IN6_IS_ADDR_LOOPBACK (&((struct sockaddr_in6 *) addr)->sin6_addr))
1657 /* skip loopback addresses */
1660 memcpy (&t6->ipv6_addr,
1661 &((struct sockaddr_in6 *) addr)->sin6_addr,
1662 sizeof (struct in6_addr));
1663 t6->u6_port = htons (plugin->port_inbound);
1664 plugin->env->notify_address(plugin->env->cls,"http",t6,sizeof (struct IPv6HttpAddress) , GNUNET_TIME_UNIT_FOREVER_REL);
1668 int hashMapFreeIterator (void *cls, const GNUNET_HashCode *key, void *value)
1670 struct Session * cs = value;
1671 struct HTTP_Connection_out * con = cs->outbound_connections_head;
1672 struct HTTP_Connection_out * tmp_con = cs->outbound_connections_head;
1673 struct HTTP_Message * msg = NULL;
1674 struct HTTP_Message * tmp_msg = NULL;
1676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing session for peer `%s'\n",GNUNET_i2s(&cs->identity));
1678 /* freeing connections */
1681 GNUNET_free(con->url);
1682 if (con->put_curl_handle!=NULL)
1683 curl_easy_cleanup(con->put_curl_handle);
1684 con->put_curl_handle = NULL;
1685 msg = con->pending_msgs_head;
1696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"All sessions freed \n");
1703 * Exit point from the plugin.
1706 libgnunet_plugin_transport_http_done (void *cls)
1708 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1709 struct Plugin *plugin = api->cls;
1712 GNUNET_assert(cls !=NULL);
1715 if ( plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1717 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
1718 plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
1721 if ( plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1723 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
1724 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1727 if ( plugin->http_server_task_send != GNUNET_SCHEDULER_NO_TASK)
1729 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_send);
1730 plugin->http_server_task_send = GNUNET_SCHEDULER_NO_TASK;
1733 if (plugin->http_server_daemon_v4 != NULL)
1735 MHD_stop_daemon (plugin->http_server_daemon_v4);
1736 plugin->http_server_daemon_v4 = NULL;
1738 if (plugin->http_server_daemon_v6 != NULL)
1740 MHD_stop_daemon (plugin->http_server_daemon_v6);
1741 plugin->http_server_daemon_v6 = NULL;
1744 /* free all sessions */
1745 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
1746 &hashMapFreeIterator,
1749 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
1751 mret = curl_multi_cleanup(plugin->multi_handle);
1752 if ( CURLM_OK != mret)
1753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed");
1755 GNUNET_free (plugin);
1757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unload http plugin complete...\n");
1763 * Entry point for the plugin.
1766 libgnunet_plugin_transport_http_init (void *cls)
1768 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1769 struct Plugin *plugin;
1770 struct GNUNET_TRANSPORT_PluginFunctions *api;
1771 struct GNUNET_TIME_Relative gn_timeout;
1772 long long unsigned int port;
1774 GNUNET_assert(cls !=NULL);
1775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting http plugin...\n");
1777 plugin = GNUNET_malloc (sizeof (struct Plugin));
1779 plugin->sessions = NULL;
1781 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1783 api->send = &http_plugin_send;
1784 api->disconnect = &http_plugin_disconnect;
1785 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1786 api->check_address = &http_plugin_address_suggested;
1787 api->address_to_string = &http_plugin_address_to_string;
1789 /* Hashing our identity to use it in URLs */
1790 GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &plugin->my_ascii_hash_ident);
1792 /* Reading port number from config file */
1794 GNUNET_CONFIGURATION_get_value_number (env->cfg,
1800 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1803 ("Require valid port number for transport plugin `%s' in configuration!\n"),
1805 libgnunet_plugin_transport_http_done (api);
1808 GNUNET_assert ((port > 0) && (port <= 65535));
1809 plugin->port_inbound = port;
1810 gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1811 if ((plugin->http_server_daemon_v4 == NULL) && (plugin->http_server_daemon_v6 == NULL) && (port != 0))
1813 plugin->http_server_daemon_v6 = MHD_start_daemon (MHD_USE_IPv6,
1815 &acceptPolicyCallback,
1816 plugin , &accessHandlerCallback, plugin,
1817 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1818 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1819 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
1820 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1821 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1823 plugin->http_server_daemon_v4 = MHD_start_daemon (MHD_NO_FLAG,
1825 &acceptPolicyCallback,
1826 plugin , &accessHandlerCallback, plugin,
1827 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 16,
1828 MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 1,
1829 MHD_OPTION_CONNECTION_TIMEOUT, (gn_timeout.value / 1000),
1830 MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
1831 MHD_OPTION_NOTIFY_COMPLETED, &requestCompletedCallback, NULL,
1834 if (plugin->http_server_daemon_v4 != NULL)
1835 plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
1836 if (plugin->http_server_daemon_v6 != NULL)
1837 plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
1839 if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1840 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 on port %u\n",port);
1841 else if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting MHD with IPv4 and IPv6 on port %u\n",port);
1845 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No MHD was started, transport plugin not functional!\n");
1846 libgnunet_plugin_transport_http_done (api);
1850 /* Initializing cURL */
1851 curl_global_init(CURL_GLOBAL_ALL);
1852 plugin->multi_handle = curl_multi_init();
1854 if ( NULL == plugin->multi_handle )
1856 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
1858 _("Could not initialize curl multi handle, failed to start http plugin!\n"),
1860 libgnunet_plugin_transport_http_done (api);
1864 plugin->sessions = GNUNET_CONTAINER_multihashmap_create (10);
1865 GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
1870 /* end of plugin_transport_http.c */