src/transport/plugin_transport_https.c

   1 /*
   2      This file is part of GNUnet
   3      (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
   4
   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.
   9
  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.
  14
  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.
  19 */
  20
  21 /**
  22  * @file transport/plugin_transport_https.c
  23  * @brief https transport service plugin
  24  * @author Matthias Wachs
  25  */
  26
  27 #include "platform.h"
  28 #include "gnunet_common.h"
  29 #include "gnunet_constants.h"
  30 #include "gnunet_protocols.h"
  31 #include "gnunet_connection_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 "gnunet_disk_lib.h"
  41 #include "microhttpd.h"
  42 #include <curl/curl.h>
  43
  44 #define DEBUG_HTTPS GNUNET_NO
  45 #define VERBOSE GNUNET_NO
  46 #define DEBUG_CURL GNUNET_NO
  47 #define DEBUG_CONNECTIONS GNUNET_NO
  48 #define DEBUG_SESSION_SELECTION GNUNET_NO
  49
  50 #define INBOUND GNUNET_NO
  51 #define OUTBOUND GNUNET_YES
  52
  53 #define PROTOCOL_PREFIX "https"
  54
  55 /**
  56  * Text of the response sent back after the last bytes of a PUT
  57  * request have been received (just to formally obey the HTTP
  58  * protocol).
  59  */
  60 #define HTTP_PUT_RESPONSE "Thank you!"
  61
  62 /**
  63  * After how long do we expire an address that we
  64  * learned from another peer if it is not reconfirmed
  65  * by anyone?
  66  */
  67 #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
  68
  69 /**
  70  * Page returned if request invalid
  71  */
  72 #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>"
  73
  74 /**
  75  * Timeout for a http connect
  76  */
  77 #define HTTP_CONNECT_TIMEOUT 30
  78
  79 /**
  80  * Network format for IPv4 addresses.
  81  */
  82 struct IPv4HttpAddress
  83 {
  84   /**
  85    * IPv4 address, in network byte order.
  86    */
  87   uint32_t ipv4_addr GNUNET_PACKED;
  88
  89   /**
  90    * Port number, in network byte order.
  91    */
  92   uint16_t u_port GNUNET_PACKED;
  93
  94 };
  95
  96
  97 /**
  98  * Network format for IPv6 addresses.
  99  */
 100 struct IPv6HttpAddress
 101 {
 102   /**
 103    * IPv6 address.
 104    */
 105   struct in6_addr ipv6_addr GNUNET_PACKED;
 106
 107   /**
 108    * Port number, in network byte order.
 109    */
 110   uint16_t u6_port GNUNET_PACKED;
 111
 112 };
 113
 114
 115 /**
 116  *  Message to send using http
 117  */
 118 struct HTTP_Message
 119 {
 120   /**
 121    * next pointer for double linked list
 122    */
 123   struct HTTP_Message * next;
 124
 125   /**
 126    * previous pointer for double linked list
 127    */
 128   struct HTTP_Message * prev;
 129
 130   /**
 131    * buffer containing data to send
 132    */
 133   char *buf;
 134
 135   /**
 136    * amount of data already sent
 137    */
 138   size_t pos;
 139
 140   /**
 141    * buffer length
 142    */
 143   size_t size;
 144
 145   /**
 146    * Continuation function to call once the transmission buffer
 147    * has again space available.  NULL if there is no
 148    * continuation to call.
 149    */
 150   GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
 151
 152   /**
 153    * Closure for transmit_cont.
 154    */
 155   void *transmit_cont_cls;
 156 };
 157
 158
 159 struct HTTP_PeerContext
 160 {
 161   /**
 162    * peer's identity
 163    */
 164   struct GNUNET_PeerIdentity identity;
 165
 166   /**
 167    * Pointer to the global plugin struct.
 168    */
 169   struct Plugin *plugin;
 170
 171   /**
 172    * Linked list of connections with this peer
 173    * head
 174    */
 175   struct Session * head;
 176
 177   /**
 178    * Linked list of connections with this peer
 179    * tail
 180    */
 181   struct Session * tail;
 182
 183   /**
 184    * id for next session
 185    */
 186   size_t session_id_counter;
 187
 188   /**
 189    * Last session used to send data
 190    */
 191   struct Session * last_session;
 192 };
 193
 194
 195 struct Session
 196 {
 197   /**
 198    * API requirement.
 199    */
 200   struct SessionHeader header;
 201
 202   /**
 203    * next session in linked list
 204    */
 205   struct Session * next;
 206
 207   /**
 208    * previous session in linked list
 209    */
 210   struct Session * prev;
 211
 212   /**
 213    * address of this session
 214    */
 215   void * addr;
 216
 217   /**
 218    * address length
 219    */
 220   size_t addrlen;
 221
 222   /**
 223    * target url
 224    */
 225   char * url;
 226
 227   /**
 228    * Message queue for outbound messages
 229    * head of queue
 230    */
 231   struct HTTP_Message * pending_msgs_head;
 232
 233   /**
 234    * Message queue for outbound messages
 235    * tail of queue
 236    */
 237   struct HTTP_Message * pending_msgs_tail;
 238
 239   /**
 240    * partner peer this connection belongs to
 241    */
 242   struct HTTP_PeerContext * peercontext;
 243
 244   /**
 245    * message stream tokenizer for incoming data
 246    */
 247   struct GNUNET_SERVER_MessageStreamTokenizer *msgtok;
 248
 249   /**
 250    * session direction
 251    * outbound: OUTBOUND (GNUNET_YES)
 252    * inbound : INBOUND (GNUNET_NO)
 253    */
 254   unsigned int direction;
 255
 256   /**
 257    * is session connected to send data?
 258    */
 259   unsigned int send_connected;
 260
 261   /**
 262    * is send connection active?
 263    */
 264   unsigned int send_active;
 265
 266   /**
 267    * connection disconnect forced (e.g. from transport)
 268    */
 269   unsigned int send_force_disconnect;
 270
 271   /**
 272    * is session connected to receive data?
 273    */
 274   unsigned int recv_connected;
 275
 276   /**
 277    * is receive connection active?
 278    */
 279   unsigned int recv_active;
 280
 281   /**
 282    * connection disconnect forced (e.g. from transport)
 283    */
 284   unsigned int recv_force_disconnect;
 285
 286   /**
 287    * id for next session
 288    * NOTE: 0 is not an ID, zero is not defined. A correct ID is always > 0
 289    */
 290   size_t session_id;
 291
 292   /**
 293    * entity managing sending data
 294    * outbound session: CURL *
 295    * inbound session: mhd_connection *
 296    */
 297   void * send_endpoint;
 298
 299   /**
 300    * entity managing recieving data
 301    * outbound session: CURL *
 302    * inbound session: mhd_connection *
 303    */
 304   void * recv_endpoint;
 305 };
 306
 307 /**
 308  * Encapsulation of all of the state of the plugin.
 309  */
 310 struct Plugin
 311 {
 312   /**
 313    * Our environment.
 314    */
 315   struct GNUNET_TRANSPORT_PluginEnvironment *env;
 316
 317   /**
 318    * Handle for reporting statistics.
 319    */
 320   struct GNUNET_STATISTICS_Handle *stats;
 321
 322   unsigned int port_inbound;
 323
 324   struct GNUNET_CONTAINER_MultiHashMap *peers;
 325
 326   /**
 327    * Daemon for listening for new IPv4 connections.
 328    */
 329   struct MHD_Daemon *http_server_daemon_v4;
 330
 331   /**
 332    * Daemon for listening for new IPv6connections.
 333    */
 334   struct MHD_Daemon *http_server_daemon_v6;
 335
 336   /**
 337    * Our primary task for http daemon handling IPv4 connections
 338    */
 339   GNUNET_SCHEDULER_TaskIdentifier http_server_task_v4;
 340
 341   /**
 342    * Our primary task for http daemon handling IPv6 connections
 343    */
 344   GNUNET_SCHEDULER_TaskIdentifier http_server_task_v6;
 345
 346   /**
 347    * The task sending data
 348    */
 349   GNUNET_SCHEDULER_TaskIdentifier http_curl_task;
 350
 351   /**
 352    * cURL Multihandle
 353    */
 354   CURLM * multi_handle;
 355
 356   /**
 357    * Our ASCII encoded, hashed peer identity
 358    * This string is used to distinguish between connections and is added to the urls
 359    */
 360   struct GNUNET_CRYPTO_HashAsciiEncoded my_ascii_hash_ident;
 361
 362   struct sockaddr_in * bind4_address;
 363   struct sockaddr_in6 * bind6_address;
 364   char * bind_hostname;
 365   int use_ipv6;
 366   int use_ipv4;
 367
 368   /* The certificate MHD uses as an \0 terminated string */
 369   char * cert;
 370
 371   /* The private key MHD uses as an \0 terminated string */
 372   char * key;
 373
 374   char * crypto_init;
 375 };
 376
 377
 378 /**
 379  * Function called for a quick conversion of the binary address to
 380  * a numeric address.  Note that the caller must not free the
 381  * address and that the next call to this function is allowed
 382  * to override the address again.
 383  *
 384  * @param cls closure
 385  * @param addr binary address
 386  * @param addrlen length of the address
 387  * @return string representing the same address
 388  */
 389 static const char*
 390 http_plugin_address_to_string (void *cls,
 391                                    const void *addr,
 392                                    size_t addrlen);
 393
 394
 395 /**
 396  * Call MHD to process pending ipv4 requests and then go back
 397  * and schedule the next run.
 398  */
 399 static void http_server_daemon_v4_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
 400 /**
 401  * Call MHD to process pending ipv6 requests and then go back
 402  * and schedule the next run.
 403  */
 404 static void http_server_daemon_v6_run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
 405
 406 /**
 407  * Function setting up curl handle and selecting message to send
 408  * @param cls plugin
 409  * @param ses session to send data to
 410  * @param con connection
 411  * @return bytes sent to peer
 412  */
 413 static ssize_t send_check_connections (void *cls, struct Session *ps);
 414
 415 /**
 416  * Function setting up file descriptors and scheduling task to run
 417  * @param cls closure
 418  * @param ses session to send data to
 419  * @param
 420  */
 421 static int curl_schedule(void *cls );
 422
 423
 424
 425 static char * create_url(void * cls, const void * addr, size_t addrlen, size_t id)
 426 {
 427   struct Plugin *plugin = cls;
 428   char *url = NULL;
 429
 430   GNUNET_assert ((addr!=NULL) && (addrlen != 0));
 431   GNUNET_asprintf(&url,
 432                   "%s://%s/%s;%u", PROTOCOL_PREFIX,
 433                   http_plugin_address_to_string(NULL, addr, addrlen),
 434                   (char *) (&plugin->my_ascii_hash_ident),id);
 435
 436   return url;
 437 }
 438
 439 /**
 440  * Removes a message from the linked list of messages
 441  * @param con connection to remove message from
 442  * @param msg message to remove
 443  * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
 444  */
 445 static int remove_http_message (struct Session * ps, struct HTTP_Message * msg)
 446 {
 447   GNUNET_CONTAINER_DLL_remove(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
 448   GNUNET_free(msg);
 449   return GNUNET_OK;
 450 }
 451
 452 int remove_peer_context_Iterator (void *cls, const GNUNET_HashCode *key, void *value);
 453
 454 /**
 455  * Removes a session from the linked list of sessions
 456  * @param pc peer context
 457  * @param ps session
 458  * @param call_msg_cont GNUNET_YES to call pending message continuations, otherwise no
 459  * @param call_msg_cont_result, result to call message continuations with
 460  * @return GNUNET_SYSERR if msg not found, GNUNET_OK on success
 461  */
 462 static int remove_session (struct HTTP_PeerContext * pc, struct Session * ps,  int call_msg_cont, int call_msg_cont_result)
 463 {
 464   struct HTTP_Message * msg;
 465   struct Plugin * plugin = ps->peercontext->plugin;
 466
 467 #if DEBUG_CONNECTIONS
 468   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: removing %s session %X with id %u\n", ps, (ps->direction == INBOUND) ? "inbound" : "outbound", ps, ps->session_id);
 469 #endif
 470   plugin->env->session_end(plugin, &pc->identity, ps);
 471
 472   GNUNET_free_non_null (ps->addr);
 473   GNUNET_SERVER_mst_destroy (ps->msgtok);
 474   GNUNET_free(ps->url);
 475
 476   if (ps->direction==INBOUND)
 477   {
 478           if (ps->recv_endpoint != NULL)
 479           {
 480                   curl_easy_cleanup(ps->recv_endpoint);
 481                   ps->recv_endpoint = NULL;
 482           }
 483           if (ps->send_endpoint != NULL)
 484           {
 485                   curl_easy_cleanup(ps->send_endpoint);
 486                   ps->send_endpoint = NULL;
 487           }
 488   }
 489
 490   msg = ps->pending_msgs_head;
 491   while (msg!=NULL)
 492   {
 493     if ((call_msg_cont == GNUNET_YES) && (msg->transmit_cont!=NULL))
 494     {
 495       msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,call_msg_cont_result);
 496     }
 497     GNUNET_CONTAINER_DLL_remove(ps->pending_msgs_head,ps->pending_msgs_head,msg);
 498     GNUNET_free(msg);
 499     msg = ps->pending_msgs_head;
 500   }
 501
 502   GNUNET_CONTAINER_DLL_remove(pc->head,pc->tail,ps);
 503   GNUNET_free(ps);
 504   ps = NULL;
 505
 506   /* no sessions left remove peer */
 507   if (pc->head==NULL)
 508   {
 509 #if DEBUG_HTTPS
 510   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No sessions left for peer `%s', removing context\n",GNUNET_i2s(&pc->identity));
 511 #endif
 512         remove_peer_context_Iterator(plugin, &pc->identity.hashPubKey, pc);
 513   }
 514
 515   return GNUNET_OK;
 516 }
 517
 518 int remove_peer_context_Iterator (void *cls, const GNUNET_HashCode *key, void *value)
 519 {
 520   struct Plugin *plugin = cls;
 521   struct HTTP_PeerContext * pc = value;
 522   struct Session * ps = pc->head;
 523   struct Session * tmp = NULL;
 524   struct HTTP_Message * msg = NULL;
 525   struct HTTP_Message * msg_tmp = NULL;
 526 #if DEBUG_HTTPS
 527   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Freeing context for peer `%s'\n",GNUNET_i2s(&pc->identity));
 528 #endif
 529   GNUNET_CONTAINER_multihashmap_remove (plugin->peers, &pc->identity.hashPubKey, pc);
 530   while (ps!=NULL)
 531   {
 532         plugin->env->session_end(plugin, &pc->identity, ps);
 533         tmp = ps->next;
 534
 535     GNUNET_free_non_null (ps->addr);
 536     GNUNET_free(ps->url);
 537     if (ps->msgtok != NULL)
 538       GNUNET_SERVER_mst_destroy (ps->msgtok);
 539
 540     msg = ps->pending_msgs_head;
 541     while (msg!=NULL)
 542     {
 543       msg_tmp = msg->next;
 544       GNUNET_free(msg);
 545       msg = msg_tmp;
 546     }
 547     if (ps->direction==OUTBOUND)
 548     {
 549       if (ps->send_endpoint!=NULL)
 550         curl_easy_cleanup(ps->send_endpoint);
 551       if (ps->recv_endpoint!=NULL)
 552         curl_easy_cleanup(ps->recv_endpoint);
 553     }
 554
 555     GNUNET_free(ps);
 556     ps=tmp;
 557   }
 558   GNUNET_free(pc);
 559   GNUNET_STATISTICS_update (plugin->env->stats,
 560                             gettext_noop ("# HTTP peers active"),
 561                             -1,
 562                             GNUNET_NO);
 563   return GNUNET_YES;
 564 }
 565
 566 /**
 567  * Add the IP of our network interface to the list of
 568  * our external IP addresses.
 569  *
 570  * @param cls the 'struct Plugin*'
 571  * @param name name of the interface
 572  * @param isDefault do we think this may be our default interface
 573  * @param addr address of the interface
 574  * @param addrlen number of bytes in addr
 575  * @return GNUNET_OK to continue iterating
 576  */
 577 static int
 578 process_interfaces (void *cls,
 579                     const char *name,
 580                     int isDefault,
 581                     const struct sockaddr *addr, socklen_t addrlen)
 582 {
 583   struct Plugin *plugin = cls;
 584   struct IPv4HttpAddress * t4;
 585   struct IPv6HttpAddress * t6;
 586   int af;
 587
 588
 589   GNUNET_assert(cls !=NULL);
 590   af = addr->sa_family;
 591   if ((af == AF_INET) && (plugin->use_ipv4 == GNUNET_YES) && (plugin->bind6_address == NULL))
 592     {
 593           struct in_addr bnd_cmp = ((struct sockaddr_in *) addr)->sin_addr;
 594       t4 = GNUNET_malloc(sizeof(struct IPv4HttpAddress));
 595       /* Not skipping loopback addresses
 596       if (INADDR_LOOPBACK == ntohl(((struct sockaddr_in *) addr)->sin_addr.s_addr))
 597       {
 598
 599         return GNUNET_OK;
 600       }
 601       */
 602       t4->ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
 603       t4->u_port = htons (plugin->port_inbound);
 604       if (plugin->bind4_address != NULL)
 605       {
 606           if (0 == memcmp(&plugin->bind4_address->sin_addr, &bnd_cmp, sizeof (struct in_addr)))
 607           {
 608                   plugin->env->notify_address(plugin->env->cls,"https",t4, sizeof (struct IPv4HttpAddress), GNUNET_TIME_UNIT_FOREVER_REL);
 609           }
 610       }
 611       else
 612       {
 613           plugin->env->notify_address(plugin->env->cls,"https",t4, sizeof (struct IPv4HttpAddress), GNUNET_TIME_UNIT_FOREVER_REL);
 614       }
 615       GNUNET_free (t4);
 616     }
 617   else if ((af == AF_INET6) && (plugin->use_ipv6 == GNUNET_YES)  && (plugin->bind4_address == NULL))
 618     {
 619           struct in6_addr bnd_cmp6 = ((struct sockaddr_in6 *) addr)->sin6_addr;
 620       if (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr))
 621           {
 622                   return GNUNET_OK;
 623           }
 624       t6 = GNUNET_malloc(sizeof(struct IPv6HttpAddress));
 625       if (plugin->bind6_address != NULL)
 626       {
 627           if (0 == memcmp(&plugin->bind6_address->sin6_addr, &bnd_cmp6, sizeof (struct in6_addr)))
 628           {
 629               memcpy (&t6->ipv6_addr,
 630                       &((struct sockaddr_in6 *) addr)->sin6_addr,
 631                       sizeof (struct in6_addr));
 632               t6->u6_port = htons (plugin->port_inbound);
 633               plugin->env->notify_address(plugin->env->cls,"https",t6,sizeof (struct IPv6HttpAddress) , GNUNET_TIME_UNIT_FOREVER_REL);
 634           }
 635       }
 636       else
 637       {
 638           memcpy (&t6->ipv6_addr,
 639                   &((struct sockaddr_in6 *) addr)->sin6_addr,
 640                   sizeof (struct in6_addr));
 641           t6->u6_port = htons (plugin->port_inbound);
 642           plugin->env->notify_address(plugin->env->cls,"https",t6,sizeof (struct IPv6HttpAddress) , GNUNET_TIME_UNIT_FOREVER_REL);
 643       }
 644       GNUNET_free (t6);
 645     }
 646   return GNUNET_OK;
 647 }
 648
 649
 650 /**
 651  * Callback called by MHD when a connection is terminated
 652  */
 653 static void mhd_termination_cb (void *cls, struct MHD_Connection * connection, void **httpSessionCache)
 654 {
 655   struct Session * ps = *httpSessionCache;
 656   if (ps == NULL)
 657     return;
 658   struct HTTP_PeerContext * pc = ps->peercontext;
 659
 660   if (connection==ps->recv_endpoint)
 661   {
 662 #if DEBUG_CONNECTIONS
 663     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
 664 #endif
 665     ps->recv_active = GNUNET_NO;
 666     ps->recv_connected = GNUNET_NO;
 667     ps->recv_endpoint = NULL;
 668   }
 669   if (connection==ps->send_endpoint)
 670   {
 671
 672     ps->send_active = GNUNET_NO;
 673     ps->send_connected = GNUNET_NO;
 674     ps->send_endpoint = NULL;
 675 #if DEBUG_CONNECTIONS
 676     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection from peer `%s' was terminated\n", ps, GNUNET_i2s(&pc->identity));
 677 #endif
 678   }
 679
 680   /* if both connections disconnected, remove session */
 681   if ((ps->send_connected == GNUNET_NO) && (ps->recv_connected == GNUNET_NO))
 682   {
 683       GNUNET_STATISTICS_update (pc->plugin->env->stats,
 684                             gettext_noop ("# HTTPS inbound sessions for peers active"),
 685                             -1,
 686                             GNUNET_NO);
 687     remove_session(pc,ps,GNUNET_YES,GNUNET_SYSERR);
 688   }
 689 }
 690
 691 static void mhd_write_mst_cb (void *cls,
 692                               void *client,
 693                               const struct GNUNET_MessageHeader *message)
 694 {
 695
 696   struct Session *ps  = cls;
 697   struct HTTP_PeerContext *pc = ps->peercontext;
 698   GNUNET_assert(ps != NULL);
 699   GNUNET_assert(pc != NULL);
 700 #if DEBUG_HTTPS
 701   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 702               "Connection %X: Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
 703               ps,
 704               ntohs(message->type),
 705               ntohs(message->size),
 706               GNUNET_i2s(&(ps->peercontext)->identity),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
 707 #endif
 708   pc->plugin->env->receive (ps->peercontext->plugin->env->cls,
 709                             &pc->identity,
 710                             message, 1, ps,
 711                             NULL,
 712                             0);
 713 }
 714
 715 /**
 716  * Check if ip is allowed to connect.
 717  */
 718 static int
 719 mhd_accept_cb (void *cls,
 720                       const struct sockaddr *addr, socklen_t addr_len)
 721 {
 722 #if 0
 723   struct Plugin *plugin = cls;
 724 #endif
 725   /* Every connection is accepted, nothing more to do here */
 726   return MHD_YES;
 727 }
 728
 729 int mhd_send_callback (void *cls, uint64_t pos, char *buf, int max)
 730 {
 731   int bytes_read = 0;
 732
 733   struct Session * ps = cls;
 734   struct HTTP_PeerContext * pc;
 735   struct HTTP_Message * msg;
 736
 737   GNUNET_assert (ps!=NULL);
 738   pc = ps->peercontext;
 739   msg = ps->pending_msgs_tail;
 740   if (ps->send_force_disconnect==GNUNET_YES)
 741   {
 742 #if DEBUG_CONNECTIONS
 743     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound forced to disconnect\n",ps);
 744 #endif
 745     return -1;
 746   }
 747
 748   if (msg!=NULL)
 749   {
 750     if ((msg->size-msg->pos) <= max)
 751     {
 752       memcpy(buf,&msg->buf[msg->pos],(msg->size-msg->pos));
 753       bytes_read = msg->size-msg->pos;
 754       msg->pos+=(msg->size-msg->pos);
 755     }
 756     else
 757     {
 758       memcpy(buf,&msg->buf[msg->pos],max);
 759       msg->pos+=max;
 760       bytes_read = max;
 761     }
 762
 763     if (msg->pos==msg->size)
 764     {
 765       if (NULL!=msg->transmit_cont)
 766         msg->transmit_cont (msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
 767       remove_http_message(ps,msg);
 768     }
 769   }
 770   return bytes_read;
 771 }
 772
 773 /**
 774  * Process GET or PUT request received via MHD.  For
 775  * GET, queue response that will send back our pending
 776  * messages.  For PUT, process incoming data and send
 777  * to GNUnet core.  In either case, check if a session
 778  * already exists and create a new one if not.
 779  */
 780 static int
 781 mdh_access_cb (void *cls,
 782                        struct MHD_Connection *mhd_connection,
 783                        const char *url,
 784                        const char *method,
 785                        const char *version,
 786                        const char *upload_data,
 787                        size_t * upload_data_size, void **httpSessionCache)
 788 {
 789   struct Plugin *plugin = cls;
 790   struct MHD_Response *response;
 791   const union MHD_ConnectionInfo * conn_info;
 792
 793   struct sockaddr_in  *addrin;
 794   struct sockaddr_in6 *addrin6;
 795
 796   char address[INET6_ADDRSTRLEN+14];
 797   struct GNUNET_PeerIdentity pi_in;
 798   size_t id_num = 0;
 799
 800   struct IPv4HttpAddress ipv4addr;
 801   struct IPv6HttpAddress ipv6addr;
 802
 803   struct HTTP_PeerContext *pc;
 804   struct Session *ps = NULL;
 805   struct Session *ps_tmp = NULL;
 806
 807   int res = GNUNET_NO;
 808   int send_error_to_client;
 809   void * addr;
 810   size_t addr_len;
 811
 812   GNUNET_assert(cls !=NULL);
 813   send_error_to_client = GNUNET_NO;
 814
 815   if (NULL == *httpSessionCache)
 816   {
 817     /* check url for peer identity , if invalid send HTTP 404*/
 818     size_t len = strlen(&url[1]);
 819     char * peer = GNUNET_malloc(104+1);
 820
 821     if ((len>104) && (url[104]==';'))
 822     {
 823         char * id = GNUNET_malloc((len-104)+1);
 824         strcpy(id,&url[105]);
 825         memcpy(peer,&url[1],103);
 826         peer[103] = '\0';
 827         id_num = strtoul ( id, NULL , 10);
 828         GNUNET_free(id);
 829     }
 830     res = GNUNET_CRYPTO_hash_from_string (peer, &(pi_in.hashPubKey));
 831     GNUNET_free(peer);
 832     if ( GNUNET_SYSERR == res )
 833     {
 834       response = MHD_create_response_from_data (strlen (HTTP_ERROR_RESPONSE),HTTP_ERROR_RESPONSE, MHD_NO, MHD_NO);
 835       res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
 836       MHD_destroy_response (response);
 837 #if DEBUG_CONNECTIONS
 838       if (res == MHD_YES)
 839         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, sent HTTP 1.1/404\n");
 840       else
 841         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Peer has no valid ident, could not send error\n");
 842 #endif
 843       return res;
 844     }
 845   }
 846   else
 847   {
 848     ps = *httpSessionCache;
 849     pc = ps->peercontext;
 850   }
 851
 852   if (NULL == *httpSessionCache)
 853   {
 854     /* get peer context */
 855     pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &pi_in.hashPubKey);
 856     /* Peer unknown */
 857     if (pc==NULL)
 858     {
 859       pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
 860       pc->plugin = plugin;
 861       pc->session_id_counter=1;
 862       pc->last_session = NULL;
 863       memcpy(&pc->identity, &pi_in, sizeof(struct GNUNET_PeerIdentity));
 864       GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
 865       GNUNET_STATISTICS_update (plugin->env->stats,
 866                             gettext_noop ("# HTTP peers active"),
 867                             1,
 868                             GNUNET_NO);
 869     }
 870
 871     conn_info = MHD_get_connection_info(mhd_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS );
 872     /* Incoming IPv4 connection */
 873     if ( AF_INET == conn_info->client_addr->sin_family)
 874     {
 875       addrin = conn_info->client_addr;
 876       inet_ntop(addrin->sin_family, &(addrin->sin_addr),address,INET_ADDRSTRLEN);
 877       memcpy(&ipv4addr.ipv4_addr,&(addrin->sin_addr),sizeof(struct in_addr));
 878       ipv4addr.u_port = addrin->sin_port;
 879       addr = &ipv4addr;
 880       addr_len = sizeof(struct IPv4HttpAddress);
 881     }
 882     /* Incoming IPv6 connection */
 883     if ( AF_INET6 == conn_info->client_addr->sin_family)
 884     {
 885       addrin6 = (struct sockaddr_in6 *) conn_info->client_addr;
 886       inet_ntop(addrin6->sin6_family, &(addrin6->sin6_addr),address,INET6_ADDRSTRLEN);
 887       memcpy(&ipv6addr.ipv6_addr,&(addrin6->sin6_addr),sizeof(struct in6_addr));
 888       ipv6addr.u6_port = addrin6->sin6_port;
 889       addr = &ipv6addr;
 890       addr_len = sizeof(struct IPv6HttpAddress);
 891     }
 892
 893     ps = NULL;
 894     /* only inbound sessions here */
 895
 896     ps_tmp = pc->head;
 897     while (ps_tmp!=NULL)
 898     {
 899       if ((ps_tmp->direction==INBOUND) && (ps_tmp->session_id == id_num) && (id_num!=0))
 900       {
 901         if ((ps_tmp->recv_force_disconnect!=GNUNET_YES) && (ps_tmp->send_force_disconnect!=GNUNET_YES))
 902         ps=ps_tmp;
 903         break;
 904       }
 905       ps_tmp=ps_tmp->next;
 906     }
 907
 908     if (ps==NULL)
 909     {
 910       ps = GNUNET_malloc(sizeof (struct Session));
 911       ps->addr = GNUNET_malloc(addr_len);
 912       memcpy(ps->addr,addr,addr_len);
 913       ps->addrlen = addr_len;
 914       ps->direction=INBOUND;
 915       ps->pending_msgs_head = NULL;
 916       ps->pending_msgs_tail = NULL;
 917       ps->send_connected=GNUNET_NO;
 918       ps->send_active=GNUNET_NO;
 919       ps->recv_connected=GNUNET_NO;
 920       ps->recv_active=GNUNET_NO;
 921       ps->peercontext=pc;
 922       ps->session_id =id_num;
 923       ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
 924       GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
 925       GNUNET_STATISTICS_update (plugin->env->stats,
 926                             gettext_noop ("# HTTPS inbound sessions for peers active"),
 927                             1,
 928                             GNUNET_NO);
 929     }
 930
 931     *httpSessionCache = ps;
 932     if (ps->msgtok==NULL)
 933       ps->msgtok = GNUNET_SERVER_mst_create (&mhd_write_mst_cb, ps);
 934 #if DEBUG_HTTPS
 935     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: HTTPS Daemon has new an incoming `%s' request from peer `%s' (`%s')\n",
 936                 ps,
 937                 method,
 938                 GNUNET_i2s(&pc->identity),
 939                 http_plugin_address_to_string(NULL, ps->addr, ps->addrlen));
 940 #endif
 941   }
 942
 943   /* Is it a PUT or a GET request */
 944   if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
 945   {
 946     if (ps->recv_force_disconnect == GNUNET_YES)
 947     {
 948 #if DEBUG_CONNECTIONS
 949       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound connection was forced to disconnect\n",ps);
 950 #endif
 951       ps->recv_active = GNUNET_NO;
 952       return MHD_NO;
 953     }
 954     if ((*upload_data_size == 0) && (ps->recv_active==GNUNET_NO))
 955     {
 956       ps->recv_endpoint = mhd_connection;
 957       ps->recv_connected = GNUNET_YES;
 958       ps->recv_active = GNUNET_YES;
 959       ps->recv_force_disconnect = GNUNET_NO;
 960 #if DEBUG_CONNECTIONS
 961       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound PUT connection connected\n",ps);
 962 #endif
 963       return MHD_YES;
 964     }
 965
 966     /* Transmission of all data complete */
 967     if ((*upload_data_size == 0) && (ps->recv_active == GNUNET_YES))
 968     {
 969       response = MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
 970       res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
 971 #if DEBUG_CONNECTIONS
 972       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Sent HTTP/1.1: 200 OK as PUT Response\n",ps);
 973 #endif
 974       MHD_destroy_response (response);
 975       ps->recv_active=GNUNET_NO;
 976       return MHD_YES;
 977     }
 978
 979     /* Recieving data */
 980     if ((*upload_data_size > 0) && (ps->recv_active == GNUNET_YES))
 981     {
 982       res = GNUNET_SERVER_mst_receive(ps->msgtok, ps, upload_data,*upload_data_size, GNUNET_NO, GNUNET_NO);
 983       (*upload_data_size) = 0;
 984       return MHD_YES;
 985     }
 986     else
 987       return MHD_NO;
 988   }
 989   if ( 0 == strcmp (MHD_HTTP_METHOD_GET, method) )
 990   {
 991     if (ps->send_force_disconnect == GNUNET_YES)
 992     {
 993 #if DEBUG_CONNECTIONS
 994       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound connection was  forced to disconnect\n",ps);
 995 #endif
 996       ps->send_active = GNUNET_NO;
 997       return MHD_NO;
 998     }
 999           ps->send_connected = GNUNET_YES;
1000           ps->send_active = GNUNET_YES;
1001           ps->send_endpoint = mhd_connection;
1002           ps->send_force_disconnect = GNUNET_NO;
1003 #if DEBUG_CONNECTIONS
1004           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound GET connection connected\n",ps);
1005 #endif
1006           response = MHD_create_response_from_callback(-1,32 * 1024, &mhd_send_callback, ps, NULL);
1007           res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
1008           MHD_destroy_response (response);
1009           return MHD_YES;
1010   }
1011   return MHD_NO;
1012 }
1013
1014 /**
1015  * Function that queries MHD's select sets and
1016  * starts the task waiting for them.
1017  */
1018 static GNUNET_SCHEDULER_TaskIdentifier
1019 http_server_daemon_prepare (void * cls, struct MHD_Daemon *daemon_handle)
1020 {
1021   struct Plugin *plugin = cls;
1022   GNUNET_SCHEDULER_TaskIdentifier ret;
1023   fd_set rs;
1024   fd_set ws;
1025   fd_set es;
1026   struct GNUNET_NETWORK_FDSet *wrs;
1027   struct GNUNET_NETWORK_FDSet *wws;
1028   struct GNUNET_NETWORK_FDSet *wes;
1029   int max;
1030   unsigned long long timeout;
1031   int haveto;
1032   struct GNUNET_TIME_Relative tv;
1033
1034   GNUNET_assert(cls !=NULL);
1035   ret = GNUNET_SCHEDULER_NO_TASK;
1036   FD_ZERO(&rs);
1037   FD_ZERO(&ws);
1038   FD_ZERO(&es);
1039   wrs = GNUNET_NETWORK_fdset_create ();
1040   wes = GNUNET_NETWORK_fdset_create ();
1041   wws = GNUNET_NETWORK_fdset_create ();
1042   max = -1;
1043   GNUNET_assert (MHD_YES ==
1044                  MHD_get_fdset (daemon_handle,
1045                                 &rs,
1046                                 &ws,
1047                                 &es,
1048                                 &max));
1049   haveto = MHD_get_timeout (daemon_handle, &timeout);
1050   if (haveto == MHD_YES)
1051     tv.value = (uint64_t) timeout;
1052   else
1053     tv = GNUNET_TIME_UNIT_FOREVER_REL;
1054   GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max);
1055   GNUNET_NETWORK_fdset_copy_native (wws, &ws, max);
1056   GNUNET_NETWORK_fdset_copy_native (wes, &es, max);
1057   if (daemon_handle == plugin->http_server_daemon_v4)
1058   {
1059         if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
1060         {
1061                 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
1062                 plugin->http_server_daemon_v4 = GNUNET_SCHEDULER_NO_TASK;
1063         }
1064
1065     ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1066                                        GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1067                                        GNUNET_SCHEDULER_NO_TASK,
1068                                        tv,
1069                                        wrs,
1070                                        wws,
1071                                        &http_server_daemon_v4_run,
1072                                        plugin);
1073   }
1074   if (daemon_handle == plugin->http_server_daemon_v6)
1075   {
1076         if (plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1077         {
1078                 GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
1079                 plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1080         }
1081
1082     ret = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1083                                        GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1084                                        GNUNET_SCHEDULER_NO_TASK,
1085                                        tv,
1086                                        wrs,
1087                                        wws,
1088                                        &http_server_daemon_v6_run,
1089                                        plugin);
1090   }
1091   GNUNET_NETWORK_fdset_destroy (wrs);
1092   GNUNET_NETWORK_fdset_destroy (wws);
1093   GNUNET_NETWORK_fdset_destroy (wes);
1094   return ret;
1095 }
1096
1097 /**
1098  * Call MHD to process pending requests and then go back
1099  * and schedule the next run.
1100  */
1101 static void http_server_daemon_v4_run (void *cls,
1102                              const struct GNUNET_SCHEDULER_TaskContext *tc)
1103 {
1104   struct Plugin *plugin = cls;
1105
1106   GNUNET_assert(cls !=NULL);
1107   plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
1108
1109   if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1110     return;
1111
1112   GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v4));
1113   plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
1114   return;
1115 }
1116
1117
1118 /**
1119  * Call MHD to process pending requests and then go back
1120  * and schedule the next run.
1121  */
1122 static void http_server_daemon_v6_run (void *cls,
1123                              const struct GNUNET_SCHEDULER_TaskContext *tc)
1124 {
1125   struct Plugin *plugin = cls;
1126
1127   GNUNET_assert(cls !=NULL);
1128   plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1129
1130   if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1131     return;
1132
1133   GNUNET_assert (MHD_YES == MHD_run (plugin->http_server_daemon_v6));
1134   plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
1135   return;
1136 }
1137
1138 static size_t curl_get_header_cb( void *ptr, size_t size, size_t nmemb, void *stream)
1139 {
1140   struct Session * ps = stream;
1141
1142   long http_result = 0;
1143   int res;
1144   /* Getting last http result code */
1145   GNUNET_assert(NULL!=ps);
1146   if (ps->recv_connected==GNUNET_NO)
1147   {
1148     res = curl_easy_getinfo(ps->recv_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
1149     if (CURLE_OK == res)
1150     {
1151       if (http_result == 200)
1152       {
1153         ps->recv_connected = GNUNET_YES;
1154         ps->recv_active = GNUNET_YES;
1155 #if DEBUG_CONNECTIONS
1156         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to recieve data\n",ps);
1157 #endif
1158         // Calling send_check_connections again since receive is established
1159         send_check_connections (ps->peercontext->plugin, ps);
1160       }
1161     }
1162   }
1163
1164 #if DEBUG_CURL
1165   char * tmp;
1166   size_t len = size * nmemb;
1167
1168   tmp = NULL;
1169   if ((size * nmemb) < SIZE_MAX)
1170     tmp = GNUNET_malloc (len+1);
1171
1172   if ((tmp != NULL) && (len > 0))
1173   {
1174     memcpy(tmp,ptr,len);
1175     if (len>=2)
1176     {
1177       if (tmp[len-2] == 13)
1178         tmp[len-2]= '\0';
1179     }
1180 #if DEBUG_CURL
1181     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Header: %s\n",ps,tmp);
1182 #endif
1183   }
1184   if (NULL != tmp)
1185     GNUNET_free (tmp);
1186 #endif
1187
1188   return size * nmemb;
1189 }
1190
1191 static size_t curl_put_header_cb( void *ptr, size_t size, size_t nmemb, void *stream)
1192 {
1193   struct Session * ps = stream;
1194
1195   char * tmp;
1196   size_t len = size * nmemb;
1197   long http_result = 0;
1198   int res;
1199
1200   /* Getting last http result code */
1201   GNUNET_assert(NULL!=ps);
1202   res = curl_easy_getinfo(ps->send_endpoint, CURLINFO_RESPONSE_CODE, &http_result);
1203   if (CURLE_OK == res)
1204   {
1205     if ((http_result == 100) && (ps->send_connected==GNUNET_NO))
1206     {
1207       ps->send_connected = GNUNET_YES;
1208       ps->send_active = GNUNET_YES;
1209 #if DEBUG_CONNECTIONS
1210       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: connected to send data\n",ps);
1211 #endif
1212     }
1213     if ((http_result == 200) && (ps->send_connected==GNUNET_YES))
1214     {
1215       ps->send_connected = GNUNET_NO;
1216       ps->send_active = GNUNET_NO;
1217 #if DEBUG_CONNECTIONS
1218       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: sending disconnected\n",ps);
1219 #endif
1220     }
1221   }
1222
1223   tmp = NULL;
1224   if ((size * nmemb) < SIZE_MAX)
1225     tmp = GNUNET_malloc (len+1);
1226
1227   if ((tmp != NULL) && (len > 0))
1228   {
1229     memcpy(tmp,ptr,len);
1230     if (len>=2)
1231     {
1232       if (tmp[len-2] == 13)
1233         tmp[len-2]= '\0';
1234     }
1235   }
1236   if (NULL != tmp)
1237     GNUNET_free (tmp);
1238
1239   return size * nmemb;
1240 }
1241
1242 /**
1243  * Callback method used with libcurl
1244  * Method is called when libcurl needs to read data during sending
1245  * @param stream pointer where to write data
1246  * @param size size of an individual element
1247  * @param nmemb count of elements that can be written to the buffer
1248  * @param ptr source pointer, passed to the libcurl handle
1249  * @return bytes written to stream
1250  */
1251 static size_t curl_send_cb(void *stream, size_t size, size_t nmemb, void *ptr)
1252 {
1253   struct Session * ps = ptr;
1254   struct HTTP_Message * msg = ps->pending_msgs_tail;
1255   size_t bytes_sent;
1256   size_t len;
1257
1258   if (ps->send_active == GNUNET_NO)
1259         return CURL_READFUNC_PAUSE;
1260
1261   if ((ps->pending_msgs_tail == NULL) && (ps->send_active == GNUNET_YES))
1262   {
1263 #if DEBUG_CONNECTIONS
1264     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: No Message to send, pausing connection\n",ps);
1265 #endif
1266     ps->send_active = GNUNET_NO;
1267     return CURL_READFUNC_PAUSE;
1268   }
1269
1270   GNUNET_assert (msg!=NULL);
1271
1272   /* data to send */
1273   if (msg->pos < msg->size)
1274   {
1275     /* data fit in buffer */
1276     if ((msg->size - msg->pos) <= (size * nmemb))
1277     {
1278       len = (msg->size - msg->pos);
1279       memcpy(stream, &msg->buf[msg->pos], len);
1280       msg->pos += len;
1281       bytes_sent = len;
1282     }
1283     else
1284     {
1285       len = size*nmemb;
1286       memcpy(stream, &msg->buf[msg->pos], len);
1287       msg->pos += len;
1288       bytes_sent = len;
1289     }
1290   }
1291   /* no data to send */
1292   else
1293   {
1294     bytes_sent = 0;
1295   }
1296
1297   if ( msg->pos == msg->size)
1298   {
1299 #if DEBUG_CONNECTIONS
1300     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: Message with %u bytes sent, removing message from queue \n",ps, msg->pos);
1301 #endif
1302     /* Calling transmit continuation  */
1303     if (( NULL != ps->pending_msgs_tail) && (NULL != ps->pending_msgs_tail->transmit_cont))
1304       msg->transmit_cont (ps->pending_msgs_tail->transmit_cont_cls,&(ps->peercontext)->identity,GNUNET_OK);
1305     remove_http_message(ps, msg);
1306   }
1307   return bytes_sent;
1308 }
1309
1310 static void curl_receive_mst_cb  (void *cls,
1311                                 void *client,
1312                                 const struct GNUNET_MessageHeader *message)
1313 {
1314   struct Session *ps  = cls;
1315   GNUNET_assert(ps != NULL);
1316
1317   struct HTTP_PeerContext *pc = ps->peercontext;
1318   GNUNET_assert(pc != NULL);
1319
1320 #if DEBUG_HTTPS
1321   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1322               "Connection %X: Forwarding message to transport service, type %u and size %u from `%s' (`%s')\n",
1323               ps,
1324               ntohs(message->type),
1325               ntohs(message->size),
1326               GNUNET_i2s(&(pc->identity)),http_plugin_address_to_string(NULL,ps->addr,ps->addrlen));
1327 #endif
1328   pc->plugin->env->receive (pc->plugin->env->cls,
1329                             &pc->identity,
1330                             message, 1, ps,
1331                             ps->addr,
1332                             ps->addrlen);
1333 }
1334
1335
1336 /**
1337 * Callback method used with libcurl
1338 * Method is called when libcurl needs to write data during sending
1339 * @param stream pointer where to write data
1340 * @param size size of an individual element
1341 * @param nmemb count of elements that can be written to the buffer
1342 * @param ptr destination pointer, passed to the libcurl handle
1343 * @return bytes read from stream
1344 */
1345 static size_t curl_receive_cb( void *stream, size_t size, size_t nmemb, void *ptr)
1346 {
1347   struct Session * ps = ptr;
1348 #if DEBUG_CONNECTIONS
1349   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: %u bytes received\n",ps, size*nmemb);
1350 #endif
1351   GNUNET_SERVER_mst_receive(ps->msgtok, ps, stream, size*nmemb, GNUNET_NO, GNUNET_NO);
1352   return (size * nmemb);
1353
1354 }
1355
1356 static void curl_perform (void *cls,
1357              const struct GNUNET_SCHEDULER_TaskContext *tc)
1358 {
1359   struct Plugin *plugin = cls;
1360   static unsigned int handles_last_run;
1361   int running;
1362   struct CURLMsg *msg;
1363   CURLMcode mret;
1364   struct Session *ps = NULL;
1365   struct HTTP_PeerContext *pc = NULL;
1366   struct HTTP_Message * cur_msg = NULL;
1367   long http_result;
1368   char * tmp;
1369
1370   GNUNET_assert(cls !=NULL);
1371
1372   plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
1373   if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1374     return;
1375
1376   do
1377     {
1378       running = 0;
1379       mret = curl_multi_perform (plugin->multi_handle, &running);
1380       if ((running < handles_last_run) && (running>0))
1381         {
1382           do
1383             {
1384
1385               msg = curl_multi_info_read (plugin->multi_handle, &running);
1386               if (running == 0)
1387                   break;
1388               /* get session for affected curl handle */
1389               GNUNET_assert ( msg->easy_handle != NULL );
1390               curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, &tmp);
1391               ps = (struct Session *) tmp;
1392               GNUNET_assert ( ps != NULL );
1393               pc = ps->peercontext;
1394               GNUNET_assert ( pc != NULL );
1395               switch (msg->msg)
1396                 {
1397
1398                 case CURLMSG_DONE:
1399                   if ( (msg->data.result != CURLE_OK) &&
1400                        (msg->data.result != CURLE_GOT_NOTHING) )
1401                   {
1402                     /* sending msg failed*/
1403                     if (msg->easy_handle == ps->send_endpoint)
1404                     {
1405 #if DEBUG_CONNECTIONS
1406                       GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1407                                  _("Connection %X: HTTPS PUT to peer `%s' (`%s') failed: `%s' `%s'\n"),
1408                                  ps,
1409                                  GNUNET_i2s(&pc->identity),
1410                                  http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1411                                  "curl_multi_perform",
1412                                  curl_easy_strerror (msg->data.result));
1413 #endif
1414                       ps->send_connected = GNUNET_NO;
1415                       ps->send_active = GNUNET_NO;
1416                       curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1417                       //curl_easy_cleanup(ps->send_endpoint);
1418                       //ps->send_endpoint=NULL;
1419                       cur_msg = ps->pending_msgs_tail;
1420                       if (( NULL != cur_msg) && ( NULL != cur_msg->transmit_cont))
1421                         cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1422                     }
1423                     /* GET connection failed */
1424                     if (msg->easy_handle == ps->recv_endpoint)
1425                     {
1426 #if DEBUG_CONNECTIONS
1427                       GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1428                            _("Connection %X: HTTPS GET to peer `%s' (`%s') failed: `%s' `%s'\n"),
1429                            ps,
1430                            GNUNET_i2s(&pc->identity),
1431                            http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1432                            "curl_multi_perform",
1433                            curl_easy_strerror (msg->data.result));
1434 #endif
1435                       ps->recv_connected = GNUNET_NO;
1436                       ps->recv_active = GNUNET_NO;
1437                       curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1438                       //curl_easy_cleanup(ps->recv_endpoint);
1439                       //ps->recv_endpoint=NULL;
1440                     }
1441                   }
1442                   else
1443                   {
1444                     if (msg->easy_handle == ps->send_endpoint)
1445                     {
1446                       GNUNET_assert (CURLE_OK == curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &http_result));
1447 #if DEBUG_CONNECTIONS
1448                       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1449                                   "Connection %X: HTTPS PUT connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1450                                    ps,
1451                                    GNUNET_i2s(&pc->identity),
1452                                    http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1453                                    http_result);
1454 #endif
1455                       /* Calling transmit continuation  */
1456                       cur_msg = ps->pending_msgs_tail;
1457                       if (( NULL != cur_msg) && (NULL != cur_msg->transmit_cont))
1458                       {
1459                         /* HTTP 1xx : Last message before here was informational */
1460                         if ((http_result >=100) && (http_result < 200))
1461                           cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1462                         /* HTTP 2xx: successful operations */
1463                         if ((http_result >=200) && (http_result < 300))
1464                           cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_OK);
1465                         /* HTTP 3xx..5xx: error */
1466                         if ((http_result >=300) && (http_result < 600))
1467                           cur_msg->transmit_cont (cur_msg->transmit_cont_cls,&pc->identity,GNUNET_SYSERR);
1468                       }
1469                       ps->send_connected = GNUNET_NO;
1470                       ps->send_active = GNUNET_NO;
1471                       curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint);
1472                       //curl_easy_cleanup(ps->send_endpoint);
1473                       //ps->send_endpoint =NULL;
1474                     }
1475                     if (msg->easy_handle == ps->recv_endpoint)
1476                     {
1477 #if DEBUG_CONNECTIONS
1478                       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1479                                   "Connection %X: HTTP GET connection to peer `%s' (`%s') was closed with HTTP code %u\n",
1480                                    ps,
1481                                    GNUNET_i2s(&pc->identity),
1482                                    http_plugin_address_to_string(NULL, ps->addr, ps->addrlen),
1483                                    http_result);
1484 #endif
1485                       ps->recv_connected = GNUNET_NO;
1486                       ps->recv_active = GNUNET_NO;
1487                       curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint);
1488                       //curl_easy_cleanup(ps->recv_endpoint);
1489                       //ps->recv_endpoint=NULL;
1490                     }
1491                   }
1492                   if ((ps->recv_connected == GNUNET_NO) && (ps->send_connected == GNUNET_NO))
1493                     remove_session (pc, ps, GNUNET_YES, GNUNET_SYSERR);
1494                   break;
1495                 default:
1496                   break;
1497                 }
1498
1499             }
1500           while ( (running > 0) );
1501         }
1502       handles_last_run = running;
1503     }
1504   while (mret == CURLM_CALL_MULTI_PERFORM);
1505   curl_schedule(plugin);
1506 }
1507
1508
1509 /**
1510  * Function setting up file descriptors and scheduling task to run
1511  * @param ses session to send data to
1512  * @return GNUNET_SYSERR for hard failure, GNUNET_OK for ok
1513  */
1514 static void
1515 http_plugin_disconnect (void *cls,
1516                             const struct GNUNET_PeerIdentity *target)
1517 {
1518
1519
1520   struct Plugin *plugin = cls;
1521   struct HTTP_PeerContext *pc = NULL;
1522   struct Session *ps = NULL;
1523   //struct Session *tmp = NULL;
1524
1525   pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1526   if (pc==NULL)
1527     return;
1528   ps = pc->head;
1529
1530   while (ps!=NULL)
1531   {
1532     /* Telling transport that session is getting disconnected */
1533     plugin->env->session_end(plugin, target, ps);
1534     if (ps->direction==OUTBOUND)
1535     {
1536       if (ps->send_endpoint!=NULL)
1537       {
1538         //GNUNET_assert(CURLM_OK == curl_multi_remove_handle(plugin->multi_handle,ps->send_endpoint));
1539         //curl_easy_cleanup(ps->send_endpoint);
1540         //ps->send_endpoint=NULL;
1541         ps->send_force_disconnect = GNUNET_YES;
1542       }
1543       if (ps->recv_endpoint!=NULL)
1544       {
1545        //GNUNET_assert(CURLM_OK == curl_multi_remove_handle(plugin->multi_handle,ps->recv_endpoint));
1546        //curl_easy_cleanup(ps->recv_endpoint);
1547        //ps->recv_endpoint=NULL;
1548        ps->recv_force_disconnect = GNUNET_YES;
1549       }
1550     }
1551
1552     if (ps->direction==INBOUND)
1553     {
1554       ps->recv_force_disconnect = GNUNET_YES;
1555       ps->send_force_disconnect = GNUNET_YES;
1556     }
1557
1558     while (ps->pending_msgs_head!=NULL)
1559     {
1560       remove_http_message(ps, ps->pending_msgs_head);
1561     }
1562     ps->recv_active = GNUNET_NO;
1563     ps->send_active = GNUNET_NO;
1564     ps=ps->next;
1565   }
1566 }
1567
1568
1569 static int curl_schedule(void *cls)
1570 {
1571   struct Plugin *plugin = cls;
1572   fd_set rs;
1573   fd_set ws;
1574   fd_set es;
1575   int max;
1576   struct GNUNET_NETWORK_FDSet *grs;
1577   struct GNUNET_NETWORK_FDSet *gws;
1578   long to;
1579   CURLMcode mret;
1580
1581   GNUNET_assert(cls !=NULL);
1582
1583   /* Cancel previous scheduled task */
1584   if (plugin->http_curl_task !=  GNUNET_SCHEDULER_NO_TASK)
1585   {
1586           GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_curl_task);
1587           plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
1588   }
1589   max = -1;
1590   FD_ZERO (&rs);
1591   FD_ZERO (&ws);
1592   FD_ZERO (&es);
1593   mret = curl_multi_fdset (plugin->multi_handle, &rs, &ws, &es, &max);
1594   if (mret != CURLM_OK)
1595     {
1596       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1597                   _("%s failed at %s:%d: `%s'\n"),
1598                   "curl_multi_fdset", __FILE__, __LINE__,
1599                   curl_multi_strerror (mret));
1600       return GNUNET_SYSERR;
1601     }
1602   mret = curl_multi_timeout (plugin->multi_handle, &to);
1603   if (mret != CURLM_OK)
1604     {
1605       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1606                   _("%s failed at %s:%d: `%s'\n"),
1607                   "curl_multi_timeout", __FILE__, __LINE__,
1608                   curl_multi_strerror (mret));
1609       return GNUNET_SYSERR;
1610     }
1611
1612   grs = GNUNET_NETWORK_fdset_create ();
1613   gws = GNUNET_NETWORK_fdset_create ();
1614   GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1615   GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1616   plugin->http_curl_task = GNUNET_SCHEDULER_add_select (plugin->env->sched,
1617                                    GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1618                                    GNUNET_SCHEDULER_NO_TASK,
1619                                    GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 0),
1620                                    grs,
1621                                    gws,
1622                                    &curl_perform,
1623                                    plugin);
1624   GNUNET_NETWORK_fdset_destroy (gws);
1625   GNUNET_NETWORK_fdset_destroy (grs);
1626   return GNUNET_OK;
1627 }
1628
1629 /**
1630  * Function setting up curl handle and selecting message to send
1631  * @param cls plugin
1632  * @param ses session to send data to
1633  * @param con connection
1634  * @return GNUNET_SYSERR on failure, GNUNET_NO if connecting, GNUNET_YES if ok
1635  */
1636 static ssize_t send_check_connections (void *cls, struct Session *ps)
1637 {
1638   struct Plugin *plugin = cls;
1639   CURLMcode mret;
1640   struct HTTP_Message * msg;
1641
1642   struct GNUNET_TIME_Relative timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
1643
1644   GNUNET_assert(cls !=NULL);
1645
1646   if (ps->direction == OUTBOUND)
1647   {
1648     /* RECV DIRECTION */
1649     /* Check if session is connected to receive data, otherwise connect to peer */
1650     if (ps->recv_connected == GNUNET_NO)
1651     {
1652         int fresh = GNUNET_NO;
1653         if (ps->recv_endpoint == NULL)
1654         {
1655             fresh = GNUNET_YES;
1656                 ps->recv_endpoint = curl_easy_init();
1657         }
1658 #if DEBUG_CURL
1659         curl_easy_setopt(ps->recv_endpoint, CURLOPT_VERBOSE, 1L);
1660 #endif
1661         curl_easy_setopt(ps->recv_endpoint, CURLOPT_URL, ps->url);
1662         curl_easy_setopt (ps->recv_endpoint, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
1663         //curl_easy_setopt (ps->recv_endpoint, CURLOPT_SSL_CIPHER_LIST, cipher_suite);
1664                 curl_easy_setopt(ps->recv_endpoint, CURLOPT_SSL_VERIFYPEER, 0);
1665                 curl_easy_setopt(ps->recv_endpoint, CURLOPT_SSL_VERIFYHOST, 0);
1666         curl_easy_setopt(ps->recv_endpoint, CURLOPT_HEADERFUNCTION, &curl_get_header_cb);
1667         curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEHEADER, ps);
1668         curl_easy_setopt(ps->recv_endpoint, CURLOPT_READFUNCTION, curl_send_cb);
1669         curl_easy_setopt(ps->recv_endpoint, CURLOPT_READDATA, ps);
1670         curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEFUNCTION, curl_receive_cb);
1671         curl_easy_setopt(ps->recv_endpoint, CURLOPT_WRITEDATA, ps);
1672         curl_easy_setopt(ps->recv_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1673         curl_easy_setopt(ps->recv_endpoint, CURLOPT_PRIVATE, ps);
1674         curl_easy_setopt(ps->recv_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1675         curl_easy_setopt(ps->recv_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1676
1677         if (fresh==GNUNET_YES)
1678         {
1679                         mret = curl_multi_add_handle(plugin->multi_handle, ps->recv_endpoint);
1680                         if (mret != CURLM_OK)
1681                         {
1682                           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1683                                                   _("Connection: %X: %s failed at %s:%d: `%s'\n"),
1684                                                   ps,
1685                                                   "curl_multi_add_handle", __FILE__, __LINE__,
1686                                                   curl_multi_strerror (mret));
1687                           return GNUNET_SYSERR;
1688                         }
1689         }
1690         if (curl_schedule (plugin) == GNUNET_SYSERR)
1691         {
1692 #if DEBUG_CONNECTIONS
1693         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: could not schedule curl task\n",ps);
1694 #endif
1695                 return GNUNET_SYSERR;
1696         }
1697 #if DEBUG_CONNECTIONS
1698         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: inbound not connected, initiating connection\n",ps);
1699 #endif
1700     }
1701
1702     /* waiting for receive direction */
1703     if (ps->recv_connected==GNUNET_NO)
1704       return GNUNET_NO;
1705
1706     /* SEND DIRECTION */
1707     /* Check if session is connected to send data, otherwise connect to peer */
1708     if ((ps->send_connected == GNUNET_YES) && (ps->send_endpoint!= NULL))
1709     {
1710       if (ps->send_active == GNUNET_YES)
1711       {
1712 #if DEBUG_CONNECTIONS
1713         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound active, enqueueing message\n",ps);
1714 #endif
1715         return GNUNET_YES;
1716       }
1717       if (ps->send_active == GNUNET_NO)
1718       {
1719 #if DEBUG_CONNECTIONS
1720         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound paused, unpausing existing connection and enqueueing message\n",ps);
1721 #endif
1722         if (CURLE_OK == curl_easy_pause(ps->send_endpoint,CURLPAUSE_CONT))
1723         {
1724                         ps->send_active=GNUNET_YES;
1725                         return GNUNET_YES;
1726         }
1727         else
1728                 return GNUNET_SYSERR;
1729       }
1730     }
1731     /* not connected, initiate connection */
1732     if (ps->send_connected==GNUNET_NO)
1733     {
1734         int fresh = GNUNET_NO;
1735         if (NULL == ps->send_endpoint)
1736         {
1737                 ps->send_endpoint = curl_easy_init();
1738                 fresh = GNUNET_YES;
1739         }
1740                 GNUNET_assert (ps->send_endpoint != NULL);
1741                 GNUNET_assert (NULL != ps->pending_msgs_tail);
1742 #if DEBUG_CONNECTIONS
1743                 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Connection %X: outbound not connected, initiating connection\n",ps);
1744 #endif
1745                 ps->send_active = GNUNET_NO;
1746                 msg = ps->pending_msgs_tail;
1747
1748 #if DEBUG_CURL
1749                 curl_easy_setopt(ps->send_endpoint, CURLOPT_VERBOSE, 1L);
1750 #endif
1751                 curl_easy_setopt(ps->send_endpoint, CURLOPT_URL, ps->url);
1752                 curl_easy_setopt(ps->send_endpoint, CURLOPT_PUT, 1L);
1753                 curl_easy_setopt(ps->send_endpoint, CURLOPT_HEADERFUNCTION, &curl_put_header_cb);
1754                 curl_easy_setopt(ps->send_endpoint, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
1755                 curl_easy_setopt(ps->send_endpoint, CURLOPT_SSL_VERIFYPEER, 0);
1756                 curl_easy_setopt(ps->send_endpoint, CURLOPT_SSL_VERIFYHOST, 0);
1757
1758                 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEHEADER, ps);
1759                 curl_easy_setopt(ps->send_endpoint, CURLOPT_READFUNCTION, curl_send_cb);
1760                 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1761                 curl_easy_setopt(ps->send_endpoint, CURLOPT_WRITEFUNCTION, curl_receive_cb);
1762                 curl_easy_setopt(ps->send_endpoint, CURLOPT_READDATA, ps);
1763                 curl_easy_setopt(ps->send_endpoint, CURLOPT_TIMEOUT, (long) timeout.value);
1764                 curl_easy_setopt(ps->send_endpoint, CURLOPT_PRIVATE, ps);
1765                 curl_easy_setopt(ps->send_endpoint, CURLOPT_CONNECTTIMEOUT, HTTP_CONNECT_TIMEOUT);
1766                 curl_easy_setopt(ps->send_endpoint, CURLOPT_BUFFERSIZE, GNUNET_SERVER_MAX_MESSAGE_SIZE);
1767
1768                 if (fresh==GNUNET_YES)
1769                 {
1770                         mret = curl_multi_add_handle(plugin->multi_handle, ps->send_endpoint);
1771                         if (mret != CURLM_OK)
1772                         {
1773                           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1774                                                   _("Connection: %X: %s failed at %s:%d: `%s'\n"),
1775                                                   ps,
1776                                                   "curl_multi_add_handle", __FILE__, __LINE__,
1777                                                   curl_multi_strerror (mret));
1778                           return GNUNET_SYSERR;
1779                         }
1780                 }
1781     }
1782     if (curl_schedule (plugin) == GNUNET_SYSERR)
1783         return GNUNET_SYSERR;
1784     return GNUNET_YES;
1785   }
1786   if (ps->direction == INBOUND)
1787   {
1788     GNUNET_assert (NULL != ps->pending_msgs_tail);
1789     if ((ps->recv_connected==GNUNET_YES) && (ps->send_connected==GNUNET_YES) &&
1790         (ps->recv_force_disconnect==GNUNET_NO) && (ps->recv_force_disconnect==GNUNET_NO))
1791         return GNUNET_YES;
1792   }
1793   return GNUNET_SYSERR;
1794 }
1795
1796 static struct Session * send_select_session (void * cls, struct HTTP_PeerContext *pc, const void * addr, size_t addrlen, int force_address, struct Session * session)
1797 {
1798         struct Session * tmp = NULL;
1799         int addr_given = GNUNET_NO;
1800
1801         if ((addr!=NULL) && (addrlen>0))
1802                 addr_given = GNUNET_YES;
1803
1804         if (force_address == GNUNET_YES)
1805         {
1806                 /* check session given as argument */
1807                 if ((session != NULL) && (addr_given == GNUNET_YES))
1808                 {
1809                       if (0 == memcmp(session->addr, addr, addrlen))
1810                       {
1811                         /* connection can not be used, since it is disconnected */
1812                         if ((session->recv_force_disconnect==GNUNET_NO) && (session->send_force_disconnect==GNUNET_NO))
1813                         {
1814 #if DEBUG_SESSION_SELECTION
1815                                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session %X selected: Using session passed by transport to send to forced address \n", session);
1816 #endif
1817                                 return session;
1818                         }
1819                       }
1820                 }
1821                 /* check last session used */
1822                 if ((pc->last_session != NULL)&& (addr_given == GNUNET_YES))
1823                 {
1824                       if (0 == memcmp(pc->last_session->addr, addr, addrlen))
1825                       {
1826                         /* connection can not be used, since it is disconnected */
1827                         if ((pc->last_session->recv_force_disconnect==GNUNET_NO) && (pc->last_session->send_force_disconnect==GNUNET_NO))
1828                         {
1829 #if DEBUG_SESSION_SELECTION
1830                                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session %X selected: Using last session used to send to forced address \n", pc->last_session);
1831 #endif
1832                                 return pc->last_session;
1833                         }
1834                       }
1835                 }
1836                 /* find session in existing sessions */
1837                 tmp = pc->head;
1838                 while ((tmp!=NULL) && (addr_given == GNUNET_YES))
1839                 {
1840
1841                           if (0 == memcmp(tmp->addr, addr, addrlen))
1842                       {
1843                         /* connection can not be used, since it is disconnected */
1844                         if ((tmp->recv_force_disconnect==GNUNET_NO) && (tmp->send_force_disconnect==GNUNET_NO))
1845                         {
1846 #if DEBUG_SESSION_SELECTION
1847                                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session %X selected: Using existing session to send to forced address \n", session);
1848 #endif
1849                                   return session;
1850                         }
1851
1852                       }
1853                           tmp=tmp->next;
1854                 }
1855                 /* no session to use */
1856                 return NULL;
1857         }
1858         if ((force_address == GNUNET_NO) || (force_address == GNUNET_SYSERR))
1859         {
1860                 /* check session given as argument */
1861                 if (session != NULL)
1862                 {
1863                         /* connection can not be used, since it is disconnected */
1864                         if ((session->recv_force_disconnect==GNUNET_NO) && (session->send_force_disconnect==GNUNET_NO))
1865                         {
1866 #if DEBUG_SESSION_SELECTION
1867                                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session %X selected: Using session passed by transport to send not-forced address \n", session);
1868 #endif
1869                                   return session;
1870                         }
1871
1872                 }
1873                 /* check last session used */
1874                 if (pc->last_session != NULL)
1875                 {
1876                         /* connection can not be used, since it is disconnected */
1877                         if ((pc->last_session->recv_force_disconnect==GNUNET_NO) && (pc->last_session->send_force_disconnect==GNUNET_NO))
1878                         {
1879 #if DEBUG_SESSION_SELECTION
1880                                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session %X selected: Using last session to send to not-forced address \n", pc->last_session);
1881 #endif
1882                                 return pc->last_session;
1883                         }
1884                 }
1885                 /* find session in existing sessions */
1886                 tmp = pc->head;
1887                 while (tmp!=NULL)
1888                 {
1889                         /* connection can not be used, since it is disconnected */
1890                         if ((tmp->recv_force_disconnect==GNUNET_NO) && (tmp->send_force_disconnect==GNUNET_NO))
1891                         {
1892 #if DEBUG_SESSION_SELECTION
1893                                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Session %X selected: Using existing session to send to not-forced address \n", tmp);
1894 #endif
1895                                 return tmp;
1896                         }
1897                         tmp=tmp->next;
1898                 }
1899                 return NULL;
1900         }
1901         return NULL;
1902 }
1903
1904 /**
1905  * Function that can be used by the transport service to transmit
1906  * a message using the plugin.   Note that in the case of a
1907  * peer disconnecting, the continuation MUST be called
1908  * prior to the disconnect notification itself.  This function
1909  * will be called with this peer's HELLO message to initiate
1910  * a fresh connection to another peer.
1911  *
1912  * @param cls closure
1913  * @param target who should receive this message
1914  * @param msgbuf the message to transmit
1915  * @param msgbuf_size number of bytes in 'msgbuf'
1916  * @param priority how important is the message (most plugins will
1917  *                 ignore message priority and just FIFO)
1918  * @param timeout how long to wait at most for the transmission (does not
1919  *                require plugins to discard the message after the timeout,
1920  *                just advisory for the desired delay; most plugins will ignore
1921  *                this as well)
1922  * @param session which session must be used (or NULL for "any")
1923  * @param addr the address to use (can be NULL if the plugin
1924  *                is "on its own" (i.e. re-use existing TCP connection))
1925  * @param addrlen length of the address in bytes
1926  * @param force_address GNUNET_YES if the plugin MUST use the given address,
1927  *                GNUNET_NO means the plugin may use any other address and
1928  *                GNUNET_SYSERR means that only reliable existing
1929  *                bi-directional connections should be used (regardless
1930  *                of address)
1931  * @param cont continuation to call once the message has
1932  *        been transmitted (or if the transport is ready
1933  *        for the next transmission call; or if the
1934  *        peer disconnected...); can be NULL
1935  * @param cont_cls closure for cont
1936  * @return number of bytes used (on the physical network, with overheads);
1937  *         -1 on hard errors (i.e. address invalid); 0 is a legal value
1938  *         and does NOT mean that the message was not transmitted (DV)
1939  */
1940 static ssize_t
1941 http_plugin_send (void *cls,
1942                   const struct GNUNET_PeerIdentity *target,
1943                   const char *msgbuf,
1944                   size_t msgbuf_size,
1945                   unsigned int priority,
1946                   struct GNUNET_TIME_Relative to,
1947                   struct Session *session,
1948                   const void *addr,
1949                   size_t addrlen,
1950                   int force_address,
1951                   GNUNET_TRANSPORT_TransmitContinuation cont,
1952                   void *cont_cls)
1953 {
1954   struct Plugin *plugin = cls;
1955   struct HTTP_Message *msg;
1956   struct HTTP_PeerContext * pc;
1957   struct Session * ps = NULL;
1958
1959   GNUNET_assert(cls !=NULL);
1960
1961 #if DEBUG_HTTPS
1962   char * force = GNUNET_malloc(40);
1963   if (force_address == GNUNET_YES)
1964     strcpy(force,"forced addr.");
1965   if (force_address == GNUNET_NO)
1966     strcpy(force,"any addr.");
1967   if (force_address == GNUNET_SYSERR)
1968     strcpy(force,"reliable bi-direc. address addr.");
1969
1970   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Transport tells me to send %u bytes to `%s' using %s (%s) and session: %X\n",
1971                                       msgbuf_size,
1972                                       GNUNET_i2s(target),
1973                                       force,
1974                                       http_plugin_address_to_string(NULL, addr, addrlen),
1975                                       session);
1976
1977   GNUNET_free(force);
1978 #endif
1979
1980   pc = GNUNET_CONTAINER_multihashmap_get (plugin->peers, &target->hashPubKey);
1981   /* Peer unknown */
1982   if (pc==NULL)
1983   {
1984     pc = GNUNET_malloc(sizeof (struct HTTP_PeerContext));
1985     pc->plugin = plugin;
1986     pc->session_id_counter=1;
1987     pc->last_session = NULL;
1988     memcpy(&pc->identity, target, sizeof(struct GNUNET_PeerIdentity));
1989     GNUNET_CONTAINER_multihashmap_put(plugin->peers, &pc->identity.hashPubKey, pc, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1990     GNUNET_STATISTICS_update (plugin->env->stats,
1991                             gettext_noop ("# HTTP peers active"),
1992                             1,
1993                             GNUNET_NO);
1994   }
1995
1996   ps = send_select_session (plugin, pc, addr, addrlen, force_address, session);
1997
1998   /* session not existing, but address forced -> creating new session */
1999   if (ps==NULL)
2000   {
2001     if ((addr!=NULL) && (addrlen!=0))
2002     {
2003       ps = GNUNET_malloc(sizeof (struct Session));
2004 #if DEBUG_SESSION_SELECTION
2005       if (force_address == GNUNET_YES)
2006         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection & forced address: creating new session %X to peer %s\n", ps, GNUNET_i2s(target));
2007       if (force_address != GNUNET_YES)
2008         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing connection: creating new session %X to peer %s\n", ps, GNUNET_i2s(target));
2009 #endif
2010       if ((addrlen!=0) && (addr!=NULL))
2011       {
2012       ps->addr = GNUNET_malloc(addrlen);
2013       memcpy(ps->addr,addr,addrlen);
2014       ps->addrlen = addrlen;
2015       }
2016       else
2017       {
2018         ps->addr = NULL;
2019         ps->addrlen = 0;
2020       }
2021       ps->direction=OUTBOUND;
2022       ps->recv_connected = GNUNET_NO;
2023       ps->recv_force_disconnect = GNUNET_NO;
2024       ps->send_connected = GNUNET_NO;
2025       ps->send_force_disconnect = GNUNET_NO;
2026       ps->pending_msgs_head = NULL;
2027       ps->pending_msgs_tail = NULL;
2028       ps->peercontext=pc;
2029       ps->session_id = pc->session_id_counter;
2030       pc->session_id_counter++;
2031       ps->url = create_url (plugin, ps->addr, ps->addrlen, ps->session_id);
2032       if (ps->msgtok == NULL)
2033         ps->msgtok = GNUNET_SERVER_mst_create (&curl_receive_mst_cb, ps);
2034       GNUNET_CONTAINER_DLL_insert(pc->head,pc->tail,ps);
2035 /* FIXME */
2036
2037       GNUNET_STATISTICS_update (plugin->env->stats,
2038                             gettext_noop ("# HTTP outbound sessions for peers active"),
2039                             1,
2040                             GNUNET_NO);
2041     }
2042     else
2043     {
2044 #if DEBUG_HTTPS
2045       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"No existing session found & and no address given: no way to send this message to peer `%s'!\n", GNUNET_i2s(target));
2046 #endif
2047       return GNUNET_SYSERR;
2048     }
2049   }
2050
2051   /* create msg */
2052   msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
2053   msg->next = NULL;
2054   msg->size = msgbuf_size;
2055   msg->pos = 0;
2056   msg->buf = (char *) &msg[1];
2057   msg->transmit_cont = cont;
2058   msg->transmit_cont_cls = cont_cls;
2059   memcpy (msg->buf,msgbuf, msgbuf_size);
2060   GNUNET_CONTAINER_DLL_insert(ps->pending_msgs_head,ps->pending_msgs_tail,msg);
2061
2062   if (send_check_connections (plugin, ps) != GNUNET_SYSERR)
2063   {
2064           if (force_address != GNUNET_YES)
2065                   pc->last_session = ps;
2066
2067           if (pc->last_session==NULL)
2068                   pc->last_session = ps;
2069           return msg->size;
2070   }
2071   else
2072           return GNUNET_SYSERR;
2073 }
2074
2075
2076
2077 /**
2078  * Function that can be used to force the plugin to disconnect
2079  * from the given peer and cancel all previous transmissions
2080  * (and their continuationc).
2081  *
2082  * @param cls closure
2083  * @param target peer from which to disconnect
2084  */
2085 /**
2086  * Convert the transports address to a nice, human-readable
2087  * format.
2088  *
2089  * @param cls closure
2090  * @param type name of the transport that generated the address
2091  * @param addr one of the addresses of the host, NULL for the last address
2092  *        the specific address format depends on the transport
2093  * @param addrlen length of the address
2094  * @param numeric should (IP) addresses be displayed in numeric form?
2095  * @param timeout after how long should we give up?
2096  * @param asc function to call on each string
2097  * @param asc_cls closure for asc
2098  */
2099 static void
2100 http_plugin_address_pretty_printer (void *cls,
2101                                         const char *type,
2102                                         const void *addr,
2103                                         size_t addrlen,
2104                                         int numeric,
2105                                         struct GNUNET_TIME_Relative timeout,
2106                                         GNUNET_TRANSPORT_AddressStringCallback
2107                                         asc, void *asc_cls)
2108 {
2109   const struct IPv4HttpAddress *t4;
2110   const struct IPv6HttpAddress *t6;
2111   struct sockaddr_in a4;
2112   struct sockaddr_in6 a6;
2113   char * address;
2114   char * ret;
2115   unsigned int port;
2116   unsigned int res;
2117
2118   GNUNET_assert(cls !=NULL);
2119   if (addrlen == sizeof (struct IPv6HttpAddress))
2120   {
2121     address = GNUNET_malloc (INET6_ADDRSTRLEN);
2122     t6 = addr;
2123     a6.sin6_addr = t6->ipv6_addr;
2124     inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
2125     port = ntohs(t6->u6_port);
2126   }
2127   else if (addrlen == sizeof (struct IPv4HttpAddress))
2128   {
2129     address = GNUNET_malloc (INET_ADDRSTRLEN);
2130     t4 = addr;
2131     a4.sin_addr.s_addr =  t4->ipv4_addr;
2132     inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
2133     port = ntohs(t4->u_port);
2134   }
2135   else
2136   {
2137     /* invalid address */
2138     GNUNET_break_op (0);
2139     asc (asc_cls, NULL);
2140     return;
2141   }
2142   res = GNUNET_asprintf(&ret,"%s://%s:%u/", PROTOCOL_PREFIX, address,port);
2143   GNUNET_free (address);
2144   GNUNET_assert(res != 0);
2145   asc (asc_cls, ret);
2146   GNUNET_free_non_null (ret);
2147 }
2148
2149
2150
2151 /**
2152  * Another peer has suggested an address for this
2153  * peer and transport plugin.  Check that this could be a valid
2154  * address.  If so, consider adding it to the list
2155  * of addresses.
2156  *
2157  * @param cls closure
2158  * @param addr pointer to the address
2159  * @param addrlen length of addr
2160  * @return GNUNET_OK if this is a plausible address for this peer
2161  *         and transport
2162  */
2163 static int
2164 http_plugin_address_suggested (void *cls,
2165                                const void *addr, size_t addrlen)
2166 {
2167   struct Plugin *plugin = cls;
2168   struct IPv4HttpAddress *v4;
2169   struct IPv6HttpAddress *v6;
2170   unsigned int port;
2171
2172   GNUNET_assert(cls !=NULL);
2173   if ((addrlen != sizeof (struct IPv4HttpAddress)) &&
2174       (addrlen != sizeof (struct IPv6HttpAddress)))
2175     {
2176       return GNUNET_SYSERR;
2177     }
2178   if (addrlen == sizeof (struct IPv4HttpAddress))
2179     {
2180       v4 = (struct IPv4HttpAddress *) addr;
2181       /* Not skipping loopback
2182       if (INADDR_LOOPBACK == ntohl(v4->ipv4_addr))
2183       {
2184         return GNUNET_SYSERR;
2185       } */
2186       port = ntohs (v4->u_port);
2187       if (port != plugin->port_inbound)
2188       {
2189         return GNUNET_SYSERR;
2190       }
2191     }
2192   if (addrlen == sizeof (struct IPv6HttpAddress))
2193     {
2194       v6 = (struct IPv6HttpAddress *) addr;
2195       if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
2196         {
2197           return GNUNET_SYSERR;
2198         }
2199       port = ntohs (v6->u6_port);
2200       if (port != plugin->port_inbound)
2201       {
2202         return GNUNET_SYSERR;
2203       }
2204     }
2205
2206   return GNUNET_OK;
2207 }
2208
2209
2210 /**
2211  * Function called for a quick conversion of the binary address to
2212  * a numeric address.  Note that the caller must not free the
2213  * address and that the next call to this function is allowed
2214  * to override the address again.
2215  *
2216  * @param cls closure
2217  * @param addr binary address
2218  * @param addrlen length of the address
2219  * @return string representing the same address
2220  */
2221 static const char*
2222 http_plugin_address_to_string (void *cls,
2223                                    const void *addr,
2224                                    size_t addrlen)
2225 {
2226   const struct IPv4HttpAddress *t4;
2227   const struct IPv6HttpAddress *t6;
2228   struct sockaddr_in a4;
2229   struct sockaddr_in6 a6;
2230   char * address;
2231   char * ret;
2232   uint16_t port;
2233   unsigned int res;
2234
2235   if (addrlen == sizeof (struct IPv6HttpAddress))
2236     {
2237       address = GNUNET_malloc (INET6_ADDRSTRLEN);
2238       t6 = addr;
2239       a6.sin6_addr = t6->ipv6_addr;
2240       inet_ntop(AF_INET6, &(a6.sin6_addr),address,INET6_ADDRSTRLEN);
2241       port = ntohs(t6->u6_port);
2242     }
2243   else if (addrlen == sizeof (struct IPv4HttpAddress))
2244     {
2245       address = GNUNET_malloc (INET_ADDRSTRLEN);
2246       t4 = addr;
2247       a4.sin_addr.s_addr =  t4->ipv4_addr;
2248       inet_ntop(AF_INET, &(a4.sin_addr),address,INET_ADDRSTRLEN);
2249       port = ntohs(t4->u_port);
2250     }
2251   else
2252     {
2253       /* invalid address */
2254       return NULL;
2255     }
2256   res = GNUNET_asprintf(&ret,"%s:%u",address,port);
2257   GNUNET_free (address);
2258   GNUNET_assert(res != 0);
2259   return ret;
2260 }
2261
2262 static char *
2263 load_certificate( const char * file )
2264 {
2265   struct GNUNET_DISK_FileHandle * gn_file;
2266
2267   struct stat fstat;
2268   char * text = NULL;
2269
2270   if (0!=STAT(file, &fstat))
2271           return NULL;
2272   text = GNUNET_malloc (fstat.st_size);
2273   gn_file = GNUNET_DISK_file_open(file,GNUNET_DISK_OPEN_READ, GNUNET_DISK_PERM_USER_READ);
2274   if (gn_file==NULL)
2275   {
2276           GNUNET_free(text);
2277           return NULL;
2278   }
2279   if (GNUNET_SYSERR == GNUNET_DISK_file_read(gn_file, text, fstat.st_size))
2280   {
2281           GNUNET_free(text);
2282           return NULL;
2283   }
2284   text[fstat.st_size] = '\0';
2285   GNUNET_DISK_file_close(gn_file);
2286
2287   return text;
2288 }
2289
2290
2291 /**
2292  * Exit point from the plugin.
2293  */
2294 void *
2295 libgnunet_plugin_transport_https_done (void *cls)
2296 {
2297   struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
2298   struct Plugin *plugin = api->cls;
2299   CURLMcode mret;
2300   GNUNET_assert(cls !=NULL);
2301
2302   if (plugin->http_server_daemon_v4 != NULL)
2303   {
2304     MHD_stop_daemon (plugin->http_server_daemon_v4);
2305     plugin->http_server_daemon_v4 = NULL;
2306   }
2307   if (plugin->http_server_daemon_v6 != NULL)
2308   {
2309     MHD_stop_daemon (plugin->http_server_daemon_v6);
2310     plugin->http_server_daemon_v6 = NULL;
2311   }
2312
2313   if ( plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2314   {
2315     GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v4);
2316     plugin->http_server_task_v4 = GNUNET_SCHEDULER_NO_TASK;
2317   }
2318
2319   if ( plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2320   {
2321     GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_server_task_v6);
2322     plugin->http_server_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2323   }
2324
2325
2326   /* free all peer information */
2327   if (plugin->peers!=NULL)
2328   {
2329           GNUNET_CONTAINER_multihashmap_iterate (plugin->peers,
2330                                                                                          &remove_peer_context_Iterator,
2331                                                                                          plugin);
2332           GNUNET_CONTAINER_multihashmap_destroy (plugin->peers);
2333   }
2334   if (plugin->multi_handle!=NULL)
2335   {
2336           mret = curl_multi_cleanup(plugin->multi_handle);
2337 #if DEBUG_HTTPS
2338           if ( CURLM_OK != mret)
2339                 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"curl multihandle clean up failed\n");
2340 #endif
2341           plugin->multi_handle = NULL;
2342   }
2343   curl_global_cleanup();
2344
2345   if ( plugin->http_curl_task != GNUNET_SCHEDULER_NO_TASK)
2346   {
2347     GNUNET_SCHEDULER_cancel(plugin->env->sched, plugin->http_curl_task);
2348     plugin->http_curl_task = GNUNET_SCHEDULER_NO_TASK;
2349   }
2350
2351   GNUNET_free_non_null (plugin->bind4_address);
2352   GNUNET_free_non_null (plugin->bind6_address);
2353   GNUNET_free_non_null (plugin->bind_hostname);
2354   GNUNET_free_non_null (plugin->crypto_init);
2355   GNUNET_free (plugin);
2356   GNUNET_free (api);
2357 #if DEBUG_HTTPS
2358   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Unload http plugin complete...\n");
2359 #endif
2360   return NULL;
2361 }
2362
2363
2364 /**
2365  * Entry point for the plugin.
2366  */
2367 void *
2368 libgnunet_plugin_transport_https_init (void *cls)
2369 {
2370   struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2371   struct Plugin *plugin;
2372   struct GNUNET_TRANSPORT_PluginFunctions *api;
2373   struct GNUNET_TIME_Relative gn_timeout;
2374   long long unsigned int port;
2375
2376   char * key_file;
2377   char * cert_file;
2378
2379   GNUNET_assert(cls !=NULL);
2380 #if DEBUG_HTTPS
2381   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting https plugin...\n");
2382 #endif
2383
2384   plugin = GNUNET_malloc (sizeof (struct Plugin));
2385   plugin->stats = env->stats;
2386   plugin->env = env;
2387   plugin->peers = NULL;
2388   plugin->bind4_address = NULL;
2389   plugin->use_ipv6  = GNUNET_YES;
2390   plugin->use_ipv4  = GNUNET_YES;
2391
2392   api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2393   api->cls = plugin;
2394   api->send = &http_plugin_send;
2395   api->disconnect = &http_plugin_disconnect;
2396   api->address_pretty_printer = &http_plugin_address_pretty_printer;
2397   api->check_address = &http_plugin_address_suggested;
2398   api->address_to_string = &http_plugin_address_to_string;
2399
2400   /* Hashing our identity to use it in URLs */
2401   GNUNET_CRYPTO_hash_to_enc ( &(plugin->env->my_identity->hashPubKey), &plugin->my_ascii_hash_ident);
2402
2403   /* Use IPv6 yes/no */
2404   if (GNUNET_CONFIGURATION_have_value (env->cfg,
2405                                                                    "transport-https", "USE_IPv6"))
2406     {
2407           plugin->use_ipv6 = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
2408                                                                                                            "transport-https",
2409                                                                                                            "USE_IPv6");
2410     }
2411   /* Use IPv4 yes/no */
2412   if (GNUNET_CONFIGURATION_have_value (env->cfg,
2413                                                                    "transport-https", "USE_IPv4"))
2414     {
2415           plugin->use_ipv4 = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
2416                                                                                                            "transport-https",
2417                                                                                                            "USE_IPv4");
2418     }
2419   /* Reading port number from config file */
2420   if ((GNUNET_OK !=
2421        GNUNET_CONFIGURATION_get_value_number (env->cfg,
2422                                               "transport-https",
2423                                               "PORT",
2424                                               &port)) ||
2425       (port > 65535) )
2426     {
2427       GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2428                        "http",
2429                        _("Require valid port number for transport plugin `%s' in configuration!\n"),
2430                        "transport-https");
2431       libgnunet_plugin_transport_https_done (api);
2432       return NULL;
2433     }
2434
2435   /* Reading ipv4 addresse to bind to from config file */
2436   if ((plugin->use_ipv4==GNUNET_YES) && (GNUNET_CONFIGURATION_have_value (env->cfg,
2437                                                                    "transport-https", "BINDTO4")))
2438   {
2439           GNUNET_break (GNUNET_OK ==
2440                                         GNUNET_CONFIGURATION_get_value_string (env->cfg,
2441                                                                                                                    "transport-https",
2442                                                                                                                    "BINDTO4",
2443                                                                                                                    &plugin->bind_hostname));
2444           plugin->bind4_address = GNUNET_malloc(sizeof(struct sockaddr_in));
2445           plugin->bind4_address->sin_family = AF_INET;
2446           plugin->bind4_address->sin_port = htons (port);
2447
2448           if (inet_pton(AF_INET,plugin->bind_hostname, &plugin->bind4_address->sin_addr)<=0)
2449           {
2450                   GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2451                                                    "http",
2452                                                    _("Misconfigured address to bind to in configuration!\n"),
2453                                                    "transport-https");
2454                   GNUNET_free(plugin->bind4_address);
2455                   GNUNET_free(plugin->bind_hostname);
2456                   plugin->bind_hostname = NULL;
2457                   plugin->bind4_address = NULL;
2458           }
2459   }
2460
2461     /* Get crypto init string from config */
2462   if (GNUNET_CONFIGURATION_have_value (env->cfg,
2463                                                                            "transport-https", "CRYPTO_INIT"))
2464   {
2465                 GNUNET_CONFIGURATION_get_value_string (env->cfg,
2466                                                                                            "transport-https",
2467                                                                                            "CRYPTO_INIT",
2468                                                                                            &plugin->crypto_init);
2469   }
2470   else
2471   {
2472           GNUNET_asprintf(&plugin->crypto_init,"NORMAL");
2473   }
2474
2475   /* Get private key file from config */
2476   if (GNUNET_CONFIGURATION_have_value (env->cfg,
2477                                                                            "transport-https", "CERT_FILE"))
2478   {
2479           GNUNET_CONFIGURATION_get_value_string (env->cfg,
2480                                                                                          "transport-https",
2481                                                                                      "CERT_FILE",
2482                                                                                      &cert_file);
2483   }
2484   else
2485   {
2486           GNUNET_asprintf(&cert_file,"https.cert");
2487   }
2488
2489   /* Get private key file from config */
2490   if (GNUNET_CONFIGURATION_have_value (env->cfg,
2491                                                                            "transport-https", "KEY_FILE"))
2492   {
2493                 GNUNET_CONFIGURATION_get_value_string (env->cfg,
2494                                                                                            "transport-https",
2495                                                                                            "KEY_FILE",
2496                                                                                            &key_file);
2497   }
2498   else
2499   {
2500           GNUNET_asprintf(&key_file,"https.key");
2501   }
2502
2503   /* Get private key file from config */
2504   if (GNUNET_CONFIGURATION_have_value (env->cfg,
2505                                                                            "transport-https", "CERT_FILE"))
2506   {
2507           GNUNET_CONFIGURATION_get_value_string (env->cfg,
2508                                                                                          "transport-https",
2509                                                                                      "CERT_FILE",
2510                                                                                      &cert_file);
2511   }
2512   else
2513   {
2514           GNUNET_asprintf(&cert_file,"https.cert");
2515   }
2516
2517   /* Reading ipv4 addresse to bind to from config file */
2518   if ((plugin->use_ipv6==GNUNET_YES) && (GNUNET_CONFIGURATION_have_value (env->cfg,
2519                                                                    "transport-https", "BINDTO6")))
2520   {
2521           GNUNET_break (GNUNET_OK ==
2522                                         GNUNET_CONFIGURATION_get_value_string (env->cfg,
2523                                                                                                                    "transport-https",
2524                                                                                                                    "BINDTO6",
2525                                                                                                                    &plugin->bind_hostname));
2526
2527           plugin->bind6_address = GNUNET_malloc(sizeof(struct sockaddr_in6));
2528           plugin->bind6_address->sin6_family = AF_INET6;
2529           plugin->bind6_address->sin6_port = htons (port);
2530
2531       if (inet_pton(AF_INET6,plugin->bind_hostname, &plugin->bind6_address->sin6_addr)<=0)
2532           {
2533                   GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2534                                                    "http",
2535                                                    _("Misconfigured address to bind to in configuration!\n"),
2536                                                    "transport-https");
2537                   GNUNET_free(plugin->bind6_address);
2538                   GNUNET_free(plugin->bind_hostname);
2539                   plugin->bind_hostname = NULL;
2540                   plugin->bind6_address = NULL;
2541           }
2542   }
2543
2544   /* read key & certificates from file */
2545   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Loading TLS certificate `%s' `%s'\n", key_file, cert_file);
2546
2547   plugin->key = load_certificate( key_file );
2548   plugin->cert = load_certificate( cert_file );
2549
2550   if ((plugin->key==NULL) || (plugin->cert==NULL))
2551   {
2552           char * cmd;
2553           int ret = 0;
2554           GNUNET_asprintf(&cmd,"gnunet-transport-certificate-creation %s %s", key_file, cert_file);
2555           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No usable TLS certificate found, creating certificate \n");
2556           ret = system(cmd);
2557
2558           if (ret != 0)
2559           {
2560                   GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2561                                            "https",
2562                                                    _("Could not create a new TLS certificate, shell script `%s' failed!\n"),cmd,
2563                                                    "transport-https");
2564                   GNUNET_free (key_file);
2565                   GNUNET_free (cert_file);
2566                   libgnunet_plugin_transport_https_done(api);
2567                   GNUNET_free (cmd);
2568                   return NULL;
2569           }
2570
2571           GNUNET_free (cmd);
2572
2573           plugin->key = load_certificate( key_file );
2574           plugin->cert = load_certificate( cert_file );
2575
2576           if ((plugin->key==NULL) || (plugin->cert==NULL))
2577           {
2578                   GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2579                                            "https",
2580                                                    _("No usable TLS certificate found and creating one failed! \n"),
2581                                                    "transport-https");
2582                   GNUNET_free (key_file);
2583                   GNUNET_free (cert_file);
2584                   libgnunet_plugin_transport_https_done(api);
2585                   return NULL;
2586           }
2587   }
2588
2589   GNUNET_free (key_file);
2590   GNUNET_free (cert_file);
2591
2592
2593   GNUNET_assert((plugin->key!=NULL) && (plugin->cert!=NULL));
2594   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TLS certificate loaded\n", key_file, cert_file);
2595
2596   GNUNET_assert ((port > 0) && (port <= 65535));
2597   plugin->port_inbound = port;
2598   gn_timeout = GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT;
2599   unsigned int timeout = (gn_timeout.value) / 1000;
2600   if ((plugin->http_server_daemon_v6 == NULL) && (plugin->use_ipv6 == GNUNET_YES) && (port != 0))
2601   {
2602         struct sockaddr * tmp = (struct sockaddr *) plugin->bind6_address;
2603     plugin->http_server_daemon_v6 = MHD_start_daemon (
2604 #if DEBUG_CONNECTIONS
2605                                                                    MHD_USE_DEBUG |
2606 #endif
2607                                                                    MHD_USE_IPv6 | MHD_USE_SSL,
2608                                        port,
2609                                        &mhd_accept_cb,
2610                                        plugin , &mdh_access_cb, plugin,
2611                                        /*MHD_OPTION_HTTPS_PRIORITIES,  "NORMAL:",*/
2612                                        /*MHD_OPTION_HTTPS_PRIORITIES,  "PERFORMANCE:",*/
2613                                        /* MHD_OPTION_HTTPS_PRIORITIES, "NONE:+VERS-TLS1.0:+ARCFOUR-128:+SHA1:+RSA:+COMP-NULL", */
2614                                        /*MHD_OPTION_HTTPS_PRIORITIES,  "NONE:+VERS-TLS1.0:+ARCFOUR-128:+MD5:+RSA:+COMP-NULL",*/
2615                                        MHD_OPTION_HTTPS_PRIORITIES,  plugin->crypto_init,
2616                                        MHD_OPTION_HTTPS_MEM_KEY, plugin->key,
2617                                        MHD_OPTION_HTTPS_MEM_CERT, plugin->cert,
2618                                        MHD_OPTION_SOCK_ADDR, tmp,
2619                                        MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 32,
2620                                        //MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 6,
2621                                        MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) timeout,
2622                                        MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2623                                        MHD_OPTION_NOTIFY_COMPLETED, &mhd_termination_cb, NULL,
2624                                        MHD_OPTION_END);
2625   }
2626   if ((plugin->http_server_daemon_v4 == NULL) && (plugin->use_ipv4 == GNUNET_YES) && (port != 0))
2627   {
2628   plugin->http_server_daemon_v4 = MHD_start_daemon (
2629 #if DEBUG_CONNECTIONS
2630                                                                    MHD_USE_DEBUG |
2631 #endif
2632                                                                    MHD_NO_FLAG | MHD_USE_SSL,
2633                                        port,
2634                                        &mhd_accept_cb,
2635                                        plugin , &mdh_access_cb, plugin,
2636                                        /*MHD_OPTION_HTTPS_PRIORITIES,  "NORMAL:",*/
2637                                        /*MHD_OPTION_HTTPS_PRIORITIES,  "PERFORMANCE:",*/
2638                                        /* MHD_OPTION_HTTPS_PRIORITIES, "NONE:+VERS-TLS1.0:+ARCFOUR-128:+SHA1:+RSA:+COMP-NULL", */
2639                                        /*MHD_OPTION_HTTPS_PRIORITIES,  "NONE:+VERS-TLS1.0:+ARCFOUR-128:+MD5:+RSA:+COMP-NULL",*/
2640                                        MHD_OPTION_HTTPS_PRIORITIES,  plugin->crypto_init,
2641                                        MHD_OPTION_HTTPS_MEM_KEY, plugin->key,
2642                                        MHD_OPTION_HTTPS_MEM_CERT, plugin->cert,
2643                                        MHD_OPTION_SOCK_ADDR, (struct sockaddr_in *)plugin->bind4_address,
2644                                        MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 32,
2645                                        //MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 6,
2646                                        MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) timeout,
2647                                        MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
2648                                        MHD_OPTION_NOTIFY_COMPLETED, &mhd_termination_cb, NULL,
2649                                        MHD_OPTION_END);
2650   }
2651   if (plugin->http_server_daemon_v4 != NULL)
2652     plugin->http_server_task_v4 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v4);
2653   if (plugin->http_server_daemon_v6 != NULL)
2654     plugin->http_server_task_v6 = http_server_daemon_prepare (plugin, plugin->http_server_daemon_v6);
2655
2656
2657   if (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK)
2658   {
2659 #if DEBUG_HTTPS
2660           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting HTTPS Server with IPv4 bound to %s with port %u\n",(plugin->bind_hostname!=NULL) ? plugin->bind_hostname : "every address",port);
2661 #endif
2662   }
2663   else if ((plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK) && (plugin->http_server_task_v4 != GNUNET_SCHEDULER_NO_TASK))
2664   {
2665 #if DEBUG_HTTPS
2666     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting HTTPS Server with IPv6 bound to %s with port %u\n",(plugin->bind_hostname!=NULL) ? plugin->bind_hostname : "every address", port);
2667 #endif
2668   }
2669   else if ((plugin->http_server_task_v6 != GNUNET_SCHEDULER_NO_TASK) && (plugin->http_server_task_v4 == GNUNET_SCHEDULER_NO_TASK))
2670   {
2671 #if DEBUG_HTTPS
2672     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,"Starting HTTPS Server with IPv4 and IPv6 bound to %s with port %u\n",(plugin->bind_hostname!=NULL) ? plugin->bind_hostname : "every address", port);
2673 #endif
2674   }
2675   else
2676   {
2677         char * tmp;
2678         if ((plugin->use_ipv6 == GNUNET_YES) && (plugin->use_ipv4 == GNUNET_YES))
2679                 GNUNET_asprintf(&tmp,"with IPv4 and IPv6 enabled");
2680         if ((plugin->use_ipv6 == GNUNET_NO) && (plugin->use_ipv4 == GNUNET_YES))
2681                 GNUNET_asprintf(&tmp,"with IPv4 enabled");
2682         if ((plugin->use_ipv6 == GNUNET_YES) && (plugin->use_ipv4 == GNUNET_NO))
2683                 GNUNET_asprintf(&tmp,"with IPv6 enabled");
2684         if ((plugin->use_ipv6 == GNUNET_NO) && (plugin->use_ipv4 == GNUNET_NO))
2685                 GNUNET_asprintf(&tmp,"with NO IP PROTOCOL enabled");
2686         GNUNET_log (GNUNET_ERROR_TYPE_ERROR,"HTTPS Server with %s could not be started on port %u! https plugin failed!\n",tmp, port);
2687         GNUNET_free(tmp);
2688     libgnunet_plugin_transport_https_done (api);
2689     return NULL;
2690   }
2691
2692   /* Initializing cURL */
2693   curl_global_init(CURL_GLOBAL_ALL);
2694   plugin->multi_handle = curl_multi_init();
2695
2696   if ( NULL == plugin->multi_handle )
2697   {
2698     GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
2699                                    "http",
2700                                    _("Could not initialize curl multi handle, failed to start http plugin!\n"),
2701                                    "transport-https");
2702     libgnunet_plugin_transport_https_done (api);
2703     return NULL;
2704   }
2705
2706   plugin->peers = GNUNET_CONTAINER_multihashmap_create (10);
2707   GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
2708
2709   return api;
2710 }
2711
2712 /* end of plugin_transport_https.c */