src/testing/testing_group.c

   1 /*
   2  This file is part of GNUnet
   3  (C) 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 testing/testing_group.c
  23  * @brief convenience API for writing testcases for GNUnet
  24  * @author Nathan Evans
  25  * @author Christian Grothoff
  26  *
  27  */
  28 #include "platform.h"
  29 #include "gnunet_constants.h"
  30 #include "gnunet_arm_service.h"
  31 #include "gnunet_testing_lib.h"
  32 #include "gnunet_core_service.h"
  33
  34 #define VERBOSE_TESTING GNUNET_NO
  35
  36 #define VERBOSE_TOPOLOGY GNUNET_NO
  37
  38 #define DEBUG_CHURN GNUNET_NO
  39
  40 #define USE_START_HELPER GNUNET_YES
  41
  42 #define OLD 1
  43
  44 /* Before connecting peers, send all of the HELLOs */
  45 #define USE_SEND_HELLOS GNUNET_NO
  46
  47 #define TOPOLOGY_HACK GNUNET_YES
  48
  49
  50 /**
  51  * Lowest port used for GNUnet testing.  Should be high enough to not
  52  * conflict with other applications running on the hosts but be low
  53  * enough to not conflict with client-ports (typically starting around
  54  * 32k).
  55  */
  56 #define LOW_PORT 12000
  57
  58 /**
  59  * Highest port used for GNUnet testing.  Should be low enough to not
  60  * conflict with the port range for "local" ports (client apps; see
  61  * /proc/sys/net/ipv4/ip_local_port_range on Linux for example).
  62  */
  63 #define HIGH_PORT 56000
  64
  65 /* Maximum time to delay connect attempt */
  66 #define MAX_CONNECT_DELAY 300
  67
  68 /**
  69  * Which list of peers do we need to modify?
  70  */
  71 enum PeerLists
  72 {
  73   /** Modify allowed peers */
  74   ALLOWED,
  75
  76   /** Modify connect peers */
  77   CONNECT,
  78
  79   /** Modify blacklist peers */
  80   BLACKLIST,
  81
  82   /** Modify workingset peers */
  83   WORKING_SET
  84 };
  85
  86 /**
  87  * Prototype of a function called whenever two peers would be connected
  88  * in a certain topology.
  89  */
  90 typedef unsigned int
  91 (*GNUNET_TESTING_ConnectionProcessor)(struct GNUNET_TESTING_PeerGroup * pg,
  92                                       unsigned int first, unsigned int second,
  93                                       enum PeerLists list, unsigned int check);
  94
  95 /**
  96  * Context for handling churning a peer group
  97  */
  98 struct ChurnContext
  99 {
 100   /**
 101    * The peergroup we are dealing with.
 102    */
 103   struct GNUNET_TESTING_PeerGroup *pg;
 104
 105   /**
 106    * Callback used to notify of churning finished
 107    */
 108   GNUNET_TESTING_NotifyCompletion cb;
 109
 110   /**
 111    * Closure for callback
 112    */
 113   void *cb_cls;
 114
 115   /**
 116    * Number of peers that still need to be started
 117    */
 118   unsigned int num_to_start;
 119
 120   /**
 121    * Number of peers that still need to be stopped
 122    */
 123   unsigned int num_to_stop;
 124
 125   /**
 126    * Number of peers that failed to start
 127    */
 128   unsigned int num_failed_start;
 129
 130   /**
 131    * Number of peers that failed to stop
 132    */
 133   unsigned int num_failed_stop;
 134 };
 135
 136 struct RestartContext
 137 {
 138   /**
 139    * The group of peers being restarted
 140    */
 141   struct GNUNET_TESTING_PeerGroup *peer_group;
 142
 143   /**
 144    * How many peers have been restarted thus far
 145    */
 146   unsigned int peers_restarted;
 147
 148   /**
 149    * How many peers got an error when restarting
 150    */
 151   unsigned int peers_restart_failed;
 152
 153   /**
 154    * The function to call once all peers have been restarted
 155    */
 156   GNUNET_TESTING_NotifyCompletion callback;
 157
 158   /**
 159    * Closure for callback function
 160    */
 161   void *callback_cls;
 162
 163 };
 164
 165 struct SendHelloContext
 166 {
 167   /**
 168    * Global handle to the peer group.
 169    */
 170   struct GNUNET_TESTING_PeerGroup *pg;
 171
 172   /**
 173    * The data about this specific peer.
 174    */
 175   struct PeerData *peer;
 176
 177   /**
 178    * The next HELLO that needs sent to this peer.
 179    */
 180   struct PeerConnection *peer_pos;
 181
 182   /**
 183    * Are we connected to CORE yet?
 184    */
 185   unsigned int core_ready;
 186
 187   /**
 188    * How many attempts should we make for failed connections?
 189    */
 190   unsigned int connect_attempts;
 191
 192   /**
 193    * Task for scheduling core connect requests to be sent.
 194    */
 195   GNUNET_SCHEDULER_TaskIdentifier core_connect_task;
 196 };
 197
 198 struct ShutdownContext
 199 {
 200   struct GNUNET_TESTING_PeerGroup *pg;
 201   /**
 202    * Total peers to wait for
 203    */
 204   unsigned int total_peers;
 205
 206   /**
 207    * Number of peers successfully shut down
 208    */
 209   unsigned int peers_down;
 210
 211   /**
 212    * Number of peers failed to shut down
 213    */
 214   unsigned int peers_failed;
 215
 216   /**
 217    * Number of peers we have started shutting
 218    * down.  If too many, wait on them.
 219    */
 220   unsigned int outstanding;
 221
 222   /**
 223    * Timeout for shutdown.
 224    */
 225   struct GNUNET_TIME_Relative timeout;
 226
 227   /**
 228    * Callback to call when all peers either
 229    * shutdown or failed to shutdown
 230    */
 231   GNUNET_TESTING_NotifyCompletion cb;
 232
 233   /**
 234    * Closure for cb
 235    */
 236   void *cb_cls;
 237 };
 238
 239 /**
 240  * Individual shutdown context for a particular peer.
 241  */
 242 struct PeerShutdownContext
 243 {
 244   /**
 245    * Pointer to the high level shutdown context.
 246    */
 247   struct ShutdownContext *shutdown_ctx;
 248
 249   /**
 250    * The daemon handle for the peer to shut down.
 251    */
 252   struct GNUNET_TESTING_Daemon *daemon;
 253 };
 254
 255 /**
 256  * Individual shutdown context for a particular peer.
 257  */
 258 struct PeerRestartContext
 259 {
 260   /**
 261    * Pointer to the high level restart context.
 262    */
 263   struct ChurnRestartContext *churn_restart_ctx;
 264
 265   /**
 266    * The daemon handle for the peer to shut down.
 267    */
 268   struct GNUNET_TESTING_Daemon *daemon;
 269 };
 270
 271 struct CreateTopologyContext
 272 {
 273
 274   /**
 275    * Function to call with number of connections
 276    */
 277   GNUNET_TESTING_NotifyConnections cont;
 278
 279   /**
 280    * Closure for connection notification
 281    */
 282   void *cls;
 283 };
 284
 285 enum States
 286 {
 287   /** Waiting to read number of peers */
 288   NUM_PEERS,
 289
 290   /** Should find next peer index */
 291   PEER_INDEX,
 292
 293   /** Should find colon */
 294   COLON,
 295
 296   /** Should read other peer index, space, or endline */
 297   OTHER_PEER_INDEX
 298 };
 299
 300 #if OLD
 301 struct PeerConnection
 302 {
 303   /**
 304    * Doubly Linked list
 305    */
 306   struct PeerConnection *prev;
 307
 308   /*
 309    * Doubly Linked list
 310    */
 311   struct PeerConnection *next;
 312
 313   /*
 314    * Index of daemon in pg->peers
 315    */
 316   uint32_t index;
 317
 318 };
 319 #endif
 320
 321 struct InternalStartContext
 322 {
 323   /**
 324    * Pointer to peerdata
 325    */
 326   struct PeerData *peer;
 327
 328   /**
 329    * Timeout for peer startup
 330    */
 331   struct GNUNET_TIME_Relative timeout;
 332
 333   /**
 334    * Client callback for hostkey notification
 335    */
 336   GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback;
 337
 338   /**
 339    * Closure for hostkey_callback
 340    */
 341   void *hostkey_cls;
 342
 343   /**
 344    * Client callback for peer start notification
 345    */
 346   GNUNET_TESTING_NotifyDaemonRunning start_cb;
 347
 348   /**
 349    * Closure for cb
 350    */
 351   void *start_cb_cls;
 352
 353   /**
 354    * Hostname, where to start the peer
 355    */
 356   const char *hostname;
 357
 358   /**
 359    * Username to use when connecting to the
 360    * host via ssh.
 361    */
 362   const char *username;
 363
 364   /**
 365    * Pointer to starting memory location of a hostkey
 366    */
 367   const char *hostkey;
 368
 369   /**
 370    * Port to use for ssh.
 371    */
 372   uint16_t sshport;
 373
 374 };
 375
 376 struct ChurnRestartContext
 377 {
 378   /**
 379    * PeerGroup that we are working with.
 380    */
 381   struct GNUNET_TESTING_PeerGroup *pg;
 382
 383   /**
 384    * Number of restarts currently in flight.
 385    */
 386   unsigned int outstanding;
 387
 388   /**
 389    * Handle to the underlying churn context.
 390    */
 391   struct ChurnContext *churn_ctx;
 392
 393   /**
 394    * How long to allow the operation to take.
 395    */
 396   struct GNUNET_TIME_Relative timeout;
 397 };
 398
 399 struct OutstandingSSH
 400 {
 401   struct OutstandingSSH *next;
 402
 403   struct OutstandingSSH *prev;
 404
 405   /**
 406    * Number of current ssh connections.
 407    */
 408   uint32_t outstanding;
 409
 410   /**
 411    * The hostname of this peer.
 412    */
 413   const char *hostname;
 414 };
 415
 416 /**
 417  * Data we keep per peer.
 418  */
 419 struct PeerData
 420 {
 421   /**
 422    * (Initial) configuration of the host.
 423    * (initial because clients could change
 424    *  it and we would not know about those
 425    *  updates).
 426    */
 427   struct GNUNET_CONFIGURATION_Handle *cfg;
 428
 429   /**
 430    * Handle for controlling the daemon.
 431    */
 432   struct GNUNET_TESTING_Daemon *daemon;
 433
 434   /**
 435    * The peergroup this peer belongs to.
 436    */
 437   struct GNUNET_TESTING_PeerGroup *pg;
 438
 439 #if OLD
 440   /**
 441    * Linked list of allowed peer connections.
 442    */
 443   struct PeerConnection *allowed_peers_head;
 444
 445   /**
 446    * Linked list of allowed peer connections.
 447    */
 448   struct PeerConnection *allowed_peers_tail;
 449
 450   /**
 451    * Linked list of blacklisted peer connections.
 452    */
 453   struct PeerConnection *blacklisted_peers_head;
 454
 455   /**
 456    * Linked list of blacklisted peer connections.
 457    */
 458   struct PeerConnection *blacklisted_peers_tail;
 459
 460   /**
 461    * Linked list of connect peer connections.
 462    */
 463   struct PeerConnection *connect_peers_head;
 464
 465   /**
 466    * Linked list of connect peer connections.
 467    */
 468   struct PeerConnection *connect_peers_tail;
 469
 470   /**
 471    * Linked list of connect peer connections.
 472    */
 473   struct PeerConnection *connect_peers_working_set_head;
 474
 475   /**
 476    * Linked list of connect peer connections.
 477    */
 478   struct PeerConnection *connect_peers_working_set_tail;
 479
 480 #else
 481   /**
 482    * Hash map of allowed peer connections (F2F created topology)
 483    */
 484   struct GNUNET_CONTAINER_MultiHashMap *allowed_peers;
 485
 486   /**
 487    * Hash map of blacklisted peers
 488    */
 489   struct GNUNET_CONTAINER_MultiHashMap *blacklisted_peers;
 490
 491   /**
 492    * Hash map of peer connections
 493    */
 494   struct GNUNET_CONTAINER_MultiHashMap *connect_peers;
 495
 496   /**
 497    * Temporary hash map of peer connections
 498    */
 499   struct GNUNET_CONTAINER_MultiHashMap *connect_peers_working_set;
 500 #endif
 501
 502   /**
 503    * Temporary variable for topology creation, should be reset before
 504    * creating any topology so the count is valid once finished.
 505    */
 506   int num_connections;
 507
 508   /**
 509    * Context to keep track of peers being started, to
 510    * stagger hostkey generation and peer startup.
 511    */
 512   struct InternalStartContext internal_context;
 513 };
 514
 515 /**
 516  * Linked list of per-host data.
 517  */
 518 struct HostData
 519 {
 520   /**
 521    * Name of the host.
 522    */
 523   char *hostname;
 524
 525   /**
 526    * SSH username to use when connecting to this host.
 527    */
 528   char *username;
 529
 530   /**
 531    * SSH port to use when connecting to this host.
 532    */
 533   uint16_t sshport;
 534
 535   /**
 536    * Lowest port that we have not yet used
 537    * for GNUnet.
 538    */
 539   uint16_t minport;
 540 };
 541
 542 struct TopologyIterateContext
 543 {
 544   /**
 545    * The peergroup we are working with.
 546    */
 547   struct GNUNET_TESTING_PeerGroup *pg;
 548
 549   /**
 550    * Callback for notifying of two connected peers.
 551    */
 552   GNUNET_TESTING_NotifyTopology topology_cb;
 553
 554   /**
 555    * Closure for topology_cb
 556    */
 557   void *cls;
 558
 559   /**
 560    * Number of peers currently connected to.
 561    */
 562   unsigned int connected;
 563
 564   /**
 565    * Number of peers we have finished iterating.
 566    */
 567   unsigned int completed;
 568
 569   /**
 570    * Number of peers total.
 571    */
 572   unsigned int total;
 573 };
 574
 575 struct StatsIterateContext
 576 {
 577   /**
 578    * The peergroup that we are dealing with.
 579    */
 580   struct GNUNET_TESTING_PeerGroup *pg;
 581
 582   /**
 583    * Continuation to call once all stats information has been retrieved.
 584    */
 585   GNUNET_STATISTICS_Callback cont;
 586
 587   /**
 588    * Proc function to call on each value received.
 589    */
 590   GNUNET_TESTING_STATISTICS_Iterator proc;
 591
 592   /**
 593    * Closure for topology_cb
 594    */
 595   void *cls;
 596
 597   /**
 598    * Number of peers currently connected to.
 599    */
 600   unsigned int connected;
 601
 602   /**
 603    * Number of peers we have finished iterating.
 604    */
 605   unsigned int completed;
 606
 607   /**
 608    * Number of peers total.
 609    */
 610   unsigned int total;
 611 };
 612
 613 struct CoreContext
 614 {
 615   void *iter_context;
 616   struct GNUNET_TESTING_Daemon *daemon;
 617 };
 618
 619 struct StatsCoreContext
 620 {
 621   void *iter_context;
 622   struct GNUNET_TESTING_Daemon *daemon;
 623   /**
 624    * Handle to the statistics service.
 625    */
 626   struct GNUNET_STATISTICS_Handle *stats_handle;
 627
 628   /**
 629    * Handle for getting statistics.
 630    */
 631   struct GNUNET_STATISTICS_GetHandle *stats_get_handle;
 632 };
 633
 634 struct ConnectTopologyContext
 635 {
 636   /**
 637    * How many connections are left to create.
 638    */
 639   unsigned int remaining_connections;
 640
 641   /**
 642    * Handle to group of peers.
 643    */
 644   struct GNUNET_TESTING_PeerGroup *pg;
 645
 646   /**
 647    * How long to try this connection before timing out.
 648    */
 649   struct GNUNET_TIME_Relative connect_timeout;
 650
 651   /**
 652    * How many times to retry connecting the two peers.
 653    */
 654   unsigned int connect_attempts;
 655
 656   /**
 657    * Temp value set for each iteration.
 658    */
 659   //struct PeerData *first;
 660
 661   /**
 662    * Notification that all peers are connected.
 663    */
 664   GNUNET_TESTING_NotifyCompletion notify_connections_done;
 665
 666   /**
 667    * Closure for notify.
 668    */
 669   void *notify_cls;
 670 };
 671
 672 /**
 673  * Handle to a group of GNUnet peers.
 674  */
 675 struct GNUNET_TESTING_PeerGroup
 676 {
 677   /**
 678    * Configuration template.
 679    */
 680   const struct GNUNET_CONFIGURATION_Handle *cfg;
 681
 682   /**
 683    * Function to call on each started daemon.
 684    */
 685   //GNUNET_TESTING_NotifyDaemonRunning cb;
 686
 687   /**
 688    * Closure for cb.
 689    */
 690   //void *cb_cls;
 691
 692   /*
 693    * Function to call on each topology connection created
 694    */
 695   GNUNET_TESTING_NotifyConnection notify_connection;
 696
 697   /*
 698    * Callback for notify_connection
 699    */
 700   void *notify_connection_cls;
 701
 702   /**
 703    * Array of information about hosts.
 704    */
 705   struct HostData *hosts;
 706
 707   /**
 708    * Number of hosts (size of HostData)
 709    */
 710   unsigned int num_hosts;
 711
 712   /**
 713    * Array of "total" peers.
 714    */
 715   struct PeerData *peers;
 716
 717   /**
 718    * Number of peers in this group.
 719    */
 720   unsigned int total;
 721
 722   /**
 723    * At what time should we fail the peer startup process?
 724    */
 725   struct GNUNET_TIME_Absolute max_timeout;
 726
 727   /**
 728    * How many peers are being started right now?
 729    */
 730   unsigned int starting;
 731
 732   /**
 733    * How many peers have already been started?
 734    */
 735   unsigned int started;
 736
 737   /**
 738    * Number of possible connections to peers
 739    * at a time.
 740    */
 741   unsigned int max_outstanding_connections;
 742
 743   /**
 744    * Number of ssh connections to peers (max).
 745    */
 746   unsigned int max_concurrent_ssh;
 747
 748   /**
 749    * Number of connects we are waiting on, allows us to rate limit
 750    * connect attempts.
 751    */
 752   unsigned int outstanding_connects;
 753
 754   /**
 755    * Number of HELLOs we have yet to send.
 756    */
 757   unsigned int remaining_hellos;
 758
 759   /**
 760    * How many connects have already been scheduled?
 761    */
 762   unsigned int total_connects_scheduled;
 763
 764   /**
 765    * Hostkeys loaded from a file.
 766    */
 767   char *hostkey_data;
 768
 769   /**
 770    * Head of DLL to keep track of the number of outstanding
 771    * ssh connections per peer.
 772    */
 773   struct OutstandingSSH *ssh_head;
 774
 775   /**
 776    * Tail of DLL to keep track of the number of outstanding
 777    * ssh connections per peer.
 778    */
 779   struct OutstandingSSH *ssh_tail;
 780
 781   /**
 782    * Stop scheduling peers connecting.
 783    */
 784   unsigned int stop_connects;
 785
 786   /**
 787    * Connection context for peer group.
 788    */
 789   struct ConnectTopologyContext ct_ctx;
 790 };
 791
 792 struct UpdateContext
 793 {
 794   /**
 795    * The altered configuration.
 796    */
 797   struct GNUNET_CONFIGURATION_Handle *ret;
 798
 799   /**
 800    * The original configuration to alter.
 801    */
 802   const struct GNUNET_CONFIGURATION_Handle *orig;
 803
 804   /**
 805    * The hostname that this peer will run on.
 806    */
 807   const char *hostname;
 808
 809   /**
 810    * The next possible port to assign.
 811    */
 812   unsigned int nport;
 813
 814   /**
 815    * Unique number for unix domain sockets.
 816    */
 817   unsigned int upnum;
 818
 819   /**
 820    * Unique number for this peer/host to offset
 821    * things that are grouped by host.
 822    */
 823   unsigned int fdnum;
 824 };
 825
 826 struct ConnectContext
 827 {
 828   /**
 829    * Index of peer to connect second to.
 830    */
 831   uint32_t first_index;
 832
 833   /**
 834    * Index of peer to connect first to.
 835    */
 836   uint32_t second_index;
 837
 838   /**
 839    * Higher level topology connection context.
 840    */
 841   struct ConnectTopologyContext *ct_ctx;
 842
 843   /**
 844    * Whether this connection has been accounted for in the schedule_connect call.
 845    */
 846   int counted;
 847 };
 848
 849 struct UnblacklistContext
 850 {
 851   /**
 852    * The peergroup
 853    */
 854   struct GNUNET_TESTING_PeerGroup *pg;
 855
 856   /**
 857    * uid of the first peer
 858    */
 859   uint32_t first_uid;
 860 };
 861
 862 struct RandomContext
 863 {
 864   /**
 865    * The peergroup
 866    */
 867   struct GNUNET_TESTING_PeerGroup *pg;
 868
 869   /**
 870    * uid of the first peer
 871    */
 872   uint32_t first_uid;
 873
 874   /**
 875    * Peer data for first peer.
 876    */
 877   struct PeerData *first;
 878
 879   /**
 880    * Random percentage to use
 881    */
 882   double percentage;
 883 };
 884
 885 struct MinimumContext
 886 {
 887   /**
 888    * The peergroup
 889    */
 890   struct GNUNET_TESTING_PeerGroup *pg;
 891
 892   /**
 893    * uid of the first peer
 894    */
 895   uint32_t first_uid;
 896
 897   /**
 898    * Peer data for first peer.
 899    */
 900   struct PeerData *first;
 901
 902   /**
 903    * Number of conns per peer
 904    */
 905   unsigned int num_to_add;
 906
 907   /**
 908    * Permuted array of all possible connections.  Only add the Nth
 909    * peer if it's in the Nth position.
 910    */
 911   unsigned int *pg_array;
 912
 913   /**
 914    * What number is the current element we are iterating over?
 915    */
 916   unsigned int current;
 917 };
 918
 919 struct DFSContext
 920 {
 921   /**
 922    * The peergroup
 923    */
 924   struct GNUNET_TESTING_PeerGroup *pg;
 925
 926   /**
 927    * uid of the first peer
 928    */
 929   uint32_t first_uid;
 930
 931   /**
 932    * uid of the second peer
 933    */
 934   uint32_t second_uid;
 935
 936   /**
 937    * Peer data for first peer.
 938    */
 939   struct PeerData *first;
 940
 941   /**
 942    * Which peer has been chosen as the one to add?
 943    */
 944   unsigned int chosen;
 945
 946   /**
 947    * What number is the current element we are iterating over?
 948    */
 949   unsigned int current;
 950 };
 951
 952 /**
 953  * Simple struct to keep track of progress, and print a
 954  * nice little percentage meter for long running tasks.
 955  */
 956 struct ProgressMeter
 957 {
 958   unsigned int total;
 959
 960   unsigned int modnum;
 961
 962   unsigned int dotnum;
 963
 964   unsigned int completed;
 965
 966   int print;
 967
 968   char *startup_string;
 969 };
 970
 971 #if !OLD
 972 /**
 973  * Convert unique ID to hash code.
 974  *
 975  * @param uid unique ID to convert
 976  * @param hash set to uid (extended with zeros)
 977  */
 978 static void
 979 hash_from_uid (uint32_t uid, GNUNET_HashCode * hash)
 980   {
 981     memset (hash, 0, sizeof (GNUNET_HashCode));
 982     *((uint32_t *) hash) = uid;
 983   }
 984
 985 /**
 986  * Convert hash code to unique ID.
 987  *
 988  * @param uid unique ID to convert
 989  * @param hash set to uid (extended with zeros)
 990  */
 991 static void
 992 uid_from_hash (const GNUNET_HashCode * hash, uint32_t * uid)
 993   {
 994     memcpy (uid, hash, sizeof (uint32_t));
 995   }
 996 #endif
 997
 998 #if USE_SEND_HELLOS
 999 static struct GNUNET_CORE_MessageHandler no_handlers[] =
1000   {
1001       { NULL, 0, 0}};
1002 #endif
1003
1004 /**
1005  * Create a meter to keep track of the progress of some task.
1006  *
1007  * @param total the total number of items to complete
1008  * @param start_string a string to prefix the meter with (if printing)
1009  * @param print GNUNET_YES to print the meter, GNUNET_NO to count
1010  *              internally only
1011  *
1012  * @return the progress meter
1013  */
1014 static struct ProgressMeter *
1015 create_meter(unsigned int total, char * start_string, int print)
1016 {
1017   struct ProgressMeter *ret;
1018   ret = GNUNET_malloc(sizeof(struct ProgressMeter));
1019   ret->print = print;
1020   ret->total = total;
1021   ret->modnum = total / 4;
1022   if (ret->modnum == 0) /* Divide by zero check */
1023     ret->modnum = 1;
1024   ret->dotnum = (total / 50) + 1;
1025   if (start_string != NULL)
1026     ret->startup_string = GNUNET_strdup(start_string);
1027   else
1028     ret->startup_string = GNUNET_strdup("");
1029
1030   return ret;
1031 }
1032
1033 /**
1034  * Update progress meter (increment by one).
1035  *
1036  * @param meter the meter to update and print info for
1037  *
1038  * @return GNUNET_YES if called the total requested,
1039  *         GNUNET_NO if more items expected
1040  */
1041 static int
1042 update_meter(struct ProgressMeter *meter)
1043 {
1044   if (meter->print == GNUNET_YES)
1045     {
1046       if (meter->completed % meter->modnum == 0)
1047         {
1048           if (meter->completed == 0)
1049             {
1050               fprintf (stdout, "%sProgress: [0%%", meter->startup_string);
1051             }
1052           else
1053             fprintf (stdout, "%d%%", (int) (((float) meter->completed
1054                 / meter->total) * 100));
1055         }
1056       else if (meter->completed % meter->dotnum == 0)
1057         fprintf (stdout, ".");
1058
1059       if (meter->completed + 1 == meter->total)
1060         fprintf (stdout, "%d%%]\n", 100);
1061       fflush (stdout);
1062     }
1063   meter->completed++;
1064
1065   if (meter->completed == meter->total)
1066     return GNUNET_YES;
1067   if (meter->completed > meter->total)
1068     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Progress meter overflow!!\n");
1069   return GNUNET_NO;
1070 }
1071
1072 /**
1073  * Reset progress meter.
1074  *
1075  * @param meter the meter to reset
1076  *
1077  * @return GNUNET_YES if meter reset,
1078  *         GNUNET_SYSERR on error
1079  */
1080 static int
1081 reset_meter(struct ProgressMeter *meter)
1082 {
1083   if (meter == NULL)
1084     return GNUNET_SYSERR;
1085
1086   meter->completed = 0;
1087   return GNUNET_YES;
1088 }
1089
1090 /**
1091  * Release resources for meter
1092  *
1093  * @param meter the meter to free
1094  */
1095 static void
1096 free_meter(struct ProgressMeter *meter)
1097 {
1098   GNUNET_free_non_null (meter->startup_string);
1099   GNUNET_free (meter);
1100 }
1101
1102 /**
1103  * Get a topology from a string input.
1104  *
1105  * @param topology where to write the retrieved topology
1106  * @param topology_string The string to attempt to
1107  *        get a configuration value from
1108  * @return GNUNET_YES if topology string matched a
1109  *         known topology, GNUNET_NO if not
1110  */
1111 int
1112 GNUNET_TESTING_topology_get(enum GNUNET_TESTING_Topology *topology,
1113                             const char *topology_string)
1114 {
1115   /**
1116    * Strings representing topologies in enum
1117    */
1118   static const char *topology_strings[] =
1119     {
1120     /**
1121      * A clique (everyone connected to everyone else).
1122      */
1123     "CLIQUE",
1124
1125     /**
1126      * Small-world network (2d torus plus random links).
1127      */
1128     "SMALL_WORLD",
1129
1130     /**
1131      * Small-world network (ring plus random links).
1132      */
1133     "SMALL_WORLD_RING",
1134
1135     /**
1136      * Ring topology.
1137      */
1138     "RING",
1139
1140     /**
1141      * 2-d torus.
1142      */
1143     "2D_TORUS",
1144
1145     /**
1146      * Random graph.
1147      */
1148     "ERDOS_RENYI",
1149
1150     /**
1151      * Certain percentage of peers are unable to communicate directly
1152      * replicating NAT conditions
1153      */
1154     "INTERNAT",
1155
1156     /**
1157      * Scale free topology.
1158      */
1159     "SCALE_FREE",
1160
1161     /**
1162      * Straight line topology.
1163      */
1164     "LINE",
1165
1166     /**
1167      * All peers are disconnected.
1168      */
1169     "NONE",
1170
1171     /**
1172      * Read the topology from a file.
1173      */
1174     "FROM_FILE",
1175
1176     NULL };
1177
1178   int curr = 0;
1179   if (topology_string == NULL)
1180     return GNUNET_NO;
1181   while (topology_strings[curr] != NULL)
1182     {
1183       if (strcasecmp (topology_strings[curr], topology_string) == 0)
1184         {
1185           *topology = curr;
1186           return GNUNET_YES;
1187         }
1188       curr++;
1189     }
1190   *topology = GNUNET_TESTING_TOPOLOGY_NONE;
1191   return GNUNET_NO;
1192 }
1193
1194 /**
1195  * Get connect topology option from string input.
1196  *
1197  * @param topology_option where to write the retrieved topology
1198  * @param topology_string The string to attempt to
1199  *        get a configuration value from
1200  * @return GNUNET_YES if string matched a known
1201  *         topology option, GNUNET_NO if not
1202  */
1203 int
1204 GNUNET_TESTING_topology_option_get(
1205                                    enum GNUNET_TESTING_TopologyOption *topology_option,
1206                                    const char *topology_string)
1207 {
1208   /**
1209    * Options for connecting a topology as strings.
1210    */
1211   static const char *topology_option_strings[] =
1212     {
1213     /**
1214      * Try to connect all peers specified in the topology.
1215      */
1216     "CONNECT_ALL",
1217
1218     /**
1219      * Choose a random subset of connections to create.
1220      */
1221     "CONNECT_RANDOM_SUBSET",
1222
1223     /**
1224      * Create at least X connections for each peer.
1225      */
1226     "CONNECT_MINIMUM",
1227
1228     /**
1229      * Using a depth first search, create one connection
1230      * per peer.  If any are missed (graph disconnected)
1231      * start over at those peers until all have at least one
1232      * connection.
1233      */
1234     "CONNECT_DFS",
1235
1236     /**
1237      * Find the N closest peers to each allowed peer in the
1238      * topology and make sure a connection to those peers
1239      * exists in the connect topology.
1240      */
1241     "CONNECT_CLOSEST",
1242
1243     /**
1244      * No options specified.
1245      */
1246     "CONNECT_NONE",
1247
1248     NULL };
1249   int curr = 0;
1250
1251   if (topology_string == NULL)
1252     return GNUNET_NO;
1253   while (NULL != topology_option_strings[curr])
1254     {
1255       if (strcasecmp (topology_option_strings[curr], topology_string) == 0)
1256         {
1257           *topology_option = curr;
1258           return GNUNET_YES;
1259         }
1260       curr++;
1261     }
1262   *topology_option = GNUNET_TESTING_TOPOLOGY_OPTION_NONE;
1263   return GNUNET_NO;
1264 }
1265
1266 /**
1267  * Function to iterate over options.  Copies
1268  * the options to the target configuration,
1269  * updating PORT values as needed.
1270  *
1271  * @param cls closure
1272  * @param section name of the section
1273  * @param option name of the option
1274  * @param value value of the option
1275  */
1276 static void
1277 update_config(void *cls, const char *section, const char *option,
1278               const char *value)
1279 {
1280   struct UpdateContext *ctx = cls;
1281   unsigned int ival;
1282   char cval[12];
1283   char uval[128];
1284   char *single_variable;
1285   char *per_host_variable;
1286   unsigned long long num_per_host;
1287
1288   GNUNET_asprintf (&single_variable, "single_%s_per_host", section);
1289   GNUNET_asprintf (&per_host_variable, "num_%s_per_host", section);
1290
1291   if ((0 == strcmp (option, "PORT")) && (1 == sscanf (value, "%u", &ival)))
1292     {
1293       if ((ival != 0) && (GNUNET_YES
1294           != GNUNET_CONFIGURATION_get_value_yesno (ctx->orig, "testing",
1295                                                    single_variable)))
1296         {
1297           GNUNET_snprintf (cval, sizeof(cval), "%u", ctx->nport++);
1298           value = cval;
1299         }
1300       else if ((ival != 0) && (GNUNET_YES
1301           == GNUNET_CONFIGURATION_get_value_yesno (ctx->orig, "testing",
1302                                                    single_variable))
1303           && GNUNET_CONFIGURATION_get_value_number (ctx->orig, "testing",
1304                                                     per_host_variable,
1305                                                     &num_per_host))
1306         {
1307           GNUNET_snprintf (cval, sizeof(cval), "%u", ival + ctx->fdnum
1308               % num_per_host);
1309           value = cval;
1310         }
1311     }
1312
1313   if (0 == strcmp (option, "UNIXPATH"))
1314     {
1315       if (GNUNET_YES != GNUNET_CONFIGURATION_get_value_yesno (ctx->orig,
1316                                                               "testing",
1317                                                               single_variable))
1318         {
1319           GNUNET_snprintf (uval, sizeof(uval), "/tmp/test-service-%s-%u",
1320                            section, ctx->upnum++);
1321           value = uval;
1322         }
1323       else if ((GNUNET_YES
1324           == GNUNET_CONFIGURATION_get_value_number (ctx->orig, "testing",
1325                                                     per_host_variable,
1326                                                     &num_per_host))
1327           && (num_per_host > 0))
1328
1329         {
1330           GNUNET_snprintf (uval, sizeof(uval), "/tmp/test-service-%s-%u",
1331                            section, ctx->fdnum % num_per_host);
1332           value = uval;
1333         }
1334     }
1335
1336   if ((0 == strcmp (option, "HOSTNAME")) && (ctx->hostname != NULL))
1337     {
1338       value = ctx->hostname;
1339     }
1340   GNUNET_free (single_variable);
1341   GNUNET_free (per_host_variable);
1342   GNUNET_CONFIGURATION_set_value_string (ctx->ret, section, option, value);
1343 }
1344
1345 /**
1346  * Create a new configuration using the given configuration
1347  * as a template; however, each PORT in the existing cfg
1348  * must be renumbered by incrementing "*port".  If we run
1349  * out of "*port" numbers, return NULL.
1350  *
1351  * @param cfg template configuration
1352  * @param off the current peer offset
1353  * @param port port numbers to use, update to reflect
1354  *             port numbers that were used
1355  * @param upnum number to make unix domain socket names unique
1356  * @param hostname hostname of the controlling host, to allow control connections from
1357  * @param fdnum number used to offset the unix domain socket for grouped processes
1358  *              (such as statistics or peerinfo, which can be shared among others)
1359  *
1360  * @return new configuration, NULL on error
1361  */
1362 static struct GNUNET_CONFIGURATION_Handle *
1363 make_config(const struct GNUNET_CONFIGURATION_Handle *cfg, uint32_t off,
1364             uint16_t * port, uint32_t * upnum, const char *hostname,
1365             uint32_t * fdnum)
1366 {
1367   struct UpdateContext uc;
1368   uint16_t orig;
1369   char *control_host;
1370   char *allowed_hosts;
1371
1372   orig = *port;
1373   uc.nport = *port;
1374   uc.upnum = *upnum;
1375   uc.fdnum = *fdnum;
1376   uc.ret = GNUNET_CONFIGURATION_create ();
1377   uc.hostname = hostname;
1378   uc.orig = cfg;
1379
1380   GNUNET_CONFIGURATION_iterate (cfg, &update_config, &uc);
1381   if (uc.nport >= HIGH_PORT)
1382     {
1383       *port = orig;
1384       GNUNET_CONFIGURATION_destroy (uc.ret);
1385       return NULL;
1386     }
1387
1388   if (GNUNET_CONFIGURATION_get_value_string (cfg, "testing", "control_host",
1389                                              &control_host) == GNUNET_OK)
1390     {
1391       if (hostname != NULL)
1392         GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1; %s;", control_host,
1393                          hostname);
1394       else
1395         GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1;", control_host);
1396
1397       GNUNET_CONFIGURATION_set_value_string (uc.ret, "core", "ACCEPT_FROM",
1398                                              allowed_hosts);
1399       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport",
1400                                              "ACCEPT_FROM", allowed_hosts);
1401       GNUNET_CONFIGURATION_set_value_string (uc.ret, "dht", "ACCEPT_FROM",
1402                                              allowed_hosts);
1403       GNUNET_CONFIGURATION_set_value_string (uc.ret, "statistics",
1404                                              "ACCEPT_FROM", allowed_hosts);
1405
1406       GNUNET_CONFIGURATION_set_value_string (uc.ret, "core", "UNIXPATH", "");
1407       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport", "UNIXPATH",
1408                                              "");
1409       GNUNET_CONFIGURATION_set_value_string (uc.ret, "dht", "UNIXPATH", "");
1410       GNUNET_CONFIGURATION_set_value_string (uc.ret, "statistics", "UNIXPATH",
1411                                              "");
1412
1413       GNUNET_free_non_null (control_host);
1414       GNUNET_free (allowed_hosts);
1415     }
1416
1417   /* arm needs to know to allow connections from the host on which it is running,
1418    * otherwise gnunet-arm is unable to connect to it in some instances */
1419   if (hostname != NULL)
1420     {
1421       GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1;", hostname);
1422       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1423                                              hostname);
1424       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1425                                              hostname);
1426       GNUNET_CONFIGURATION_set_value_string (uc.ret, "arm", "ACCEPT_FROM",
1427                                              allowed_hosts);
1428       GNUNET_free (allowed_hosts);
1429     }
1430   else
1431     {
1432       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1433                                              "127.0.0.1");
1434       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1435                                              "127.0.0.1");
1436     }
1437
1438   *port = (uint16_t) uc.nport;
1439   *upnum = uc.upnum;
1440   uc.fdnum++;
1441   *fdnum = uc.fdnum;
1442   return uc.ret;
1443 }
1444
1445 /*
1446  * Remove entries from the peer connection list
1447  *
1448  * @param pg the peer group we are working with
1449  * @param first index of the first peer
1450  * @param second index of the second peer
1451  * @param list the peer list to use
1452  * @param check UNUSED
1453  *
1454  * @return the number of connections added (can be 0, 1 or 2)
1455  *
1456  */
1457 static unsigned int
1458 remove_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1459                    unsigned int second, enum PeerLists list, unsigned int check)
1460 {
1461   int removed;
1462 #if OLD
1463   struct PeerConnection **first_list;
1464   struct PeerConnection **second_list;
1465   struct PeerConnection *first_iter;
1466   struct PeerConnection *second_iter;
1467   struct PeerConnection **first_tail;
1468   struct PeerConnection **second_tail;
1469
1470 #else
1471   GNUNET_HashCode hash_first;
1472   GNUNET_HashCode hash_second;
1473
1474   hash_from_uid (first, &hash_first);
1475   hash_from_uid (second, &hash_second);
1476 #endif
1477
1478   removed = 0;
1479 #if OLD
1480   switch (list)
1481     {
1482   case ALLOWED:
1483     first_list = &pg->peers[first].allowed_peers_head;
1484     second_list = &pg->peers[second].allowed_peers_head;
1485     first_tail = &pg->peers[first].allowed_peers_tail;
1486     second_tail = &pg->peers[second].allowed_peers_tail;
1487     break;
1488   case CONNECT:
1489     first_list = &pg->peers[first].connect_peers_head;
1490     second_list = &pg->peers[second].connect_peers_head;
1491     first_tail = &pg->peers[first].connect_peers_tail;
1492     second_tail = &pg->peers[second].connect_peers_tail;
1493     break;
1494   case BLACKLIST:
1495     first_list = &pg->peers[first].blacklisted_peers_head;
1496     second_list = &pg->peers[second].blacklisted_peers_head;
1497     first_tail = &pg->peers[first].blacklisted_peers_tail;
1498     second_tail = &pg->peers[second].blacklisted_peers_tail;
1499     break;
1500   case WORKING_SET:
1501     first_list = &pg->peers[first].connect_peers_working_set_head;
1502     second_list = &pg->peers[second].connect_peers_working_set_head;
1503     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1504     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1505     break;
1506   default:
1507     GNUNET_break(0);
1508     return 0;
1509     }
1510
1511   first_iter = *first_list;
1512   while (first_iter != NULL)
1513     {
1514       if (first_iter->index == second)
1515         {
1516           GNUNET_CONTAINER_DLL_remove(*first_list, *first_tail, first_iter);
1517           GNUNET_free(first_iter);
1518           removed++;
1519           break;
1520         }
1521       first_iter = first_iter->next;
1522     }
1523
1524   second_iter = *second_list;
1525   while (second_iter != NULL)
1526     {
1527       if (second_iter->index == first)
1528         {
1529           GNUNET_CONTAINER_DLL_remove(*second_list, *second_tail, second_iter);
1530           GNUNET_free(second_iter);
1531           removed++;
1532           break;
1533         }
1534       second_iter = second_iter->next;
1535     }
1536 #else
1537   if (GNUNET_YES ==
1538       GNUNET_CONTAINER_multihashmap_contains (pg->peers[first].blacklisted_peers,
1539           &hash_second))
1540     {
1541       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[first].blacklisted_peers,
1542           &hash_second);
1543     }
1544
1545   if (GNUNET_YES ==
1546       GNUNET_CONTAINER_multihashmap_contains (pg->peers[second].blacklisted_peers,
1547           &hash_first))
1548     {
1549       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[second].blacklisted_peers,
1550           &hash_first);
1551     }
1552 #endif
1553
1554   return removed;
1555 }
1556
1557 /*
1558  * Add entries to the some list
1559  *
1560  * @param pg the peer group we are working with
1561  * @param first index of the first peer
1562  * @param second index of the second peer
1563  * @param list the list type that we should modify
1564  * @param check GNUNET_YES to check lists before adding
1565  *              GNUNET_NO to force add
1566  *
1567  * @return the number of connections added (can be 0, 1 or 2)
1568  *
1569  */
1570 static unsigned int
1571 add_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1572                 unsigned int second, enum PeerLists list, unsigned int check)
1573 {
1574   int added;
1575   int add_first;
1576   int add_second;
1577
1578   struct PeerConnection **first_list;
1579   struct PeerConnection **second_list;
1580   struct PeerConnection *first_iter;
1581   struct PeerConnection *second_iter;
1582   struct PeerConnection *new_first;
1583   struct PeerConnection *new_second;
1584   struct PeerConnection **first_tail;
1585   struct PeerConnection **second_tail;
1586
1587   switch (list)
1588     {
1589   case ALLOWED:
1590     first_list = &pg->peers[first].allowed_peers_head;
1591     second_list = &pg->peers[second].allowed_peers_head;
1592     first_tail = &pg->peers[first].allowed_peers_tail;
1593     second_tail = &pg->peers[second].allowed_peers_tail;
1594     break;
1595   case CONNECT:
1596     first_list = &pg->peers[first].connect_peers_head;
1597     second_list = &pg->peers[second].connect_peers_head;
1598     first_tail = &pg->peers[first].connect_peers_tail;
1599     second_tail = &pg->peers[second].connect_peers_tail;
1600     break;
1601   case BLACKLIST:
1602     first_list = &pg->peers[first].blacklisted_peers_head;
1603     second_list = &pg->peers[second].blacklisted_peers_head;
1604     first_tail = &pg->peers[first].blacklisted_peers_tail;
1605     second_tail = &pg->peers[second].blacklisted_peers_tail;
1606     break;
1607   case WORKING_SET:
1608     first_list = &pg->peers[first].connect_peers_working_set_head;
1609     second_list = &pg->peers[second].connect_peers_working_set_head;
1610     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1611     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1612     break;
1613   default:
1614     GNUNET_break(0);
1615     return 0;
1616     }
1617
1618   add_first = GNUNET_YES;
1619   add_second = GNUNET_YES;
1620
1621   if (check == GNUNET_YES)
1622     {
1623       first_iter = *first_list;
1624       while (first_iter != NULL)
1625         {
1626           if (first_iter->index == second)
1627             {
1628               add_first = GNUNET_NO;
1629               break;
1630             }
1631           first_iter = first_iter->next;
1632         }
1633
1634       second_iter = *second_list;
1635       while (second_iter != NULL)
1636         {
1637           if (second_iter->index == first)
1638             {
1639               add_second = GNUNET_NO;
1640               break;
1641             }
1642           second_iter = second_iter->next;
1643         }
1644     }
1645
1646   added = 0;
1647   if (add_first)
1648     {
1649       new_first = GNUNET_malloc (sizeof (struct PeerConnection));
1650       new_first->index = second;
1651       GNUNET_CONTAINER_DLL_insert(*first_list, *first_tail, new_first);
1652       pg->peers[first].num_connections++;
1653       added++;
1654     }
1655
1656   if (add_second)
1657     {
1658       new_second = GNUNET_malloc (sizeof (struct PeerConnection));
1659       new_second->index = first;
1660       GNUNET_CONTAINER_DLL_insert(*second_list, *second_tail, new_second);
1661       pg->peers[second].num_connections++;
1662       added++;
1663     }
1664
1665   return added;
1666 }
1667
1668 /**
1669  * Scale free network construction as described in:
1670  *
1671  * "Emergence of Scaling in Random Networks." Science 286, 509-512, 1999.
1672  *
1673  * Start with a network of "one" peer, then progressively add
1674  * peers up to the total number.  At each step, iterate over
1675  * all possible peers and connect new peer based on number of
1676  * existing connections of the target peer.
1677  *
1678  * @param pg the peer group we are dealing with
1679  * @param proc the connection processor to use
1680  * @param list the peer list to use
1681  *
1682  * @return the number of connections created
1683  */
1684 static unsigned int
1685 create_scale_free(struct GNUNET_TESTING_PeerGroup *pg,
1686                   GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
1687 {
1688
1689   unsigned int total_connections;
1690   unsigned int outer_count;
1691   unsigned int i;
1692   unsigned int previous_total_connections;
1693   double random;
1694   double probability;
1695
1696   GNUNET_assert (pg->total > 1);
1697
1698   /* Add a connection between the first two nodes */
1699   total_connections = proc (pg, 0, 1, list, GNUNET_YES);
1700
1701   for (outer_count = 1; outer_count < pg->total; outer_count++)
1702     {
1703       previous_total_connections = total_connections;
1704       for (i = 0; i < outer_count; i++)
1705         {
1706           probability = pg->peers[i].num_connections
1707               / (double) previous_total_connections;
1708           random
1709               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1710                                                     UINT64_MAX))
1711                   / ((double) UINT64_MAX);
1712 #if VERBOSE_TESTING
1713           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1714               "Considering connecting peer %d to peer %d\n",
1715               outer_count, i);
1716 #endif
1717           if (random < probability)
1718             {
1719 #if VERBOSE_TESTING
1720               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1721                   "Connecting peer %d to peer %d\n", outer_count, i);
1722 #endif
1723               total_connections += proc (pg, outer_count, i, list, GNUNET_YES);
1724             }
1725         }
1726     }
1727
1728   return total_connections;
1729 }
1730
1731 /**
1732  * Create a topology given a peer group (set of running peers)
1733  * and a connection processor.  Creates a small world topology
1734  * according to the rewired ring construction.  The basic
1735  * behavior is that a ring topology is created, but with some
1736  * probability instead of connecting a peer to the next
1737  * neighbor in the ring a connection will be created to a peer
1738  * selected uniformly at random.   We use the TESTING
1739  * PERCENTAGE option to specify what number of
1740  * connections each peer should have.  Default is 2,
1741  * which makes the ring, any given number is multiplied by
1742  * the log of the network size; i.e. a PERCENTAGE of 2 makes
1743  * each peer have on average 2logn connections.  The additional
1744  * connections are made at increasing distance around the ring
1745  * from the original peer, or to random peers based on the re-
1746  * wiring probability. The TESTING
1747  * PROBABILITY option is used as the probability that a given
1748  * connection is rewired.
1749  *
1750  * @param pg the peergroup to create the topology on
1751  * @param proc the connection processor to call to actually set
1752  *        up connections between two peers
1753  * @param list the peer list to use
1754  *
1755  * @return the number of connections that were set up
1756  *
1757  */
1758 static unsigned int
1759 create_small_world_ring(struct GNUNET_TESTING_PeerGroup *pg,
1760                         GNUNET_TESTING_ConnectionProcessor proc,
1761                         enum PeerLists list)
1762 {
1763   unsigned int i, j;
1764   int nodeToConnect;
1765   unsigned int natLog;
1766   unsigned int randomPeer;
1767   double random, logNModifier, probability;
1768   unsigned int smallWorldConnections;
1769   int connsPerPeer;
1770   char *p_string;
1771   int max;
1772   int min;
1773   unsigned int useAnd;
1774   int connect_attempts;
1775
1776   logNModifier = 0.5; /* FIXME: default value? */
1777   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1778                                                           "PERCENTAGE",
1779                                                           &p_string))
1780     {
1781       if (sscanf (p_string, "%lf", &logNModifier) != 1)
1782         GNUNET_log (
1783                     GNUNET_ERROR_TYPE_WARNING,
1784                     _
1785                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1786                     p_string, "LOGNMODIFIER", "TESTING");
1787       GNUNET_free (p_string);
1788     }
1789   probability = 0.5; /* FIXME: default percentage? */
1790   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1791                                                           "PROBABILITY",
1792                                                           &p_string))
1793     {
1794       if (sscanf (p_string, "%lf", &probability) != 1)
1795         GNUNET_log (
1796                     GNUNET_ERROR_TYPE_WARNING,
1797                     _
1798                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1799                     p_string, "PERCENTAGE", "TESTING");
1800       GNUNET_free (p_string);
1801     }
1802   natLog = log (pg->total);
1803   connsPerPeer = ceil (natLog * logNModifier);
1804
1805   if (connsPerPeer % 2 == 1)
1806     connsPerPeer += 1;
1807
1808   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Target is %d connections per peer."),
1809               connsPerPeer);
1810
1811   smallWorldConnections = 0;
1812   connect_attempts = 0;
1813   for (i = 0; i < pg->total; i++)
1814     {
1815       useAnd = 0;
1816       max = i + connsPerPeer / 2;
1817       min = i - connsPerPeer / 2;
1818
1819       if (max > pg->total - 1)
1820         {
1821           max = max - pg->total;
1822           useAnd = 1;
1823         }
1824
1825       if (min < 0)
1826         {
1827           min = pg->total - 1 + min;
1828           useAnd = 1;
1829         }
1830
1831       for (j = 0; j < connsPerPeer / 2; j++)
1832         {
1833           random
1834               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1835                                                     UINT64_MAX)
1836                   / ((double) UINT64_MAX));
1837           if (random < probability)
1838             {
1839               /* Connect to uniformly selected random peer */
1840               randomPeer
1841                   = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1842                                               pg->total);
1843               while ((((randomPeer < max) && (randomPeer > min)) && (useAnd
1844                   == 0)) || (((randomPeer > min) || (randomPeer < max))
1845                   && (useAnd == 1)))
1846                 {
1847                   randomPeer
1848                       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1849                                                   pg->total);
1850                 }
1851               smallWorldConnections += proc (pg, i, randomPeer, list,
1852                                              GNUNET_YES);
1853             }
1854           else
1855             {
1856               nodeToConnect = i + j + 1;
1857               if (nodeToConnect > pg->total - 1)
1858                 {
1859                   nodeToConnect = nodeToConnect - pg->total;
1860                 }
1861               connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
1862             }
1863         }
1864
1865     }
1866
1867   connect_attempts += smallWorldConnections;
1868
1869   return connect_attempts;
1870 }
1871
1872 /**
1873  * Create a topology given a peer group (set of running peers)
1874  * and a connection processor.
1875  *
1876  * @param pg the peergroup to create the topology on
1877  * @param proc the connection processor to call to actually set
1878  *        up connections between two peers
1879  * @param list the peer list to use
1880  *
1881  * @return the number of connections that were set up
1882  *
1883  */
1884 static unsigned int
1885 create_nated_internet(struct GNUNET_TESTING_PeerGroup *pg,
1886                       GNUNET_TESTING_ConnectionProcessor proc,
1887                       enum PeerLists list)
1888 {
1889   unsigned int outer_count, inner_count;
1890   unsigned int cutoff;
1891   int connect_attempts;
1892   double nat_percentage;
1893   char *p_string;
1894
1895   nat_percentage = 0.6; /* FIXME: default percentage? */
1896   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1897                                                           "PERCENTAGE",
1898                                                           &p_string))
1899     {
1900       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1901         GNUNET_log (
1902                     GNUNET_ERROR_TYPE_WARNING,
1903                     _
1904                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1905                     p_string, "PERCENTAGE", "TESTING");
1906       GNUNET_free (p_string);
1907     }
1908
1909   cutoff = (unsigned int) (nat_percentage * pg->total);
1910   connect_attempts = 0;
1911   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1912     {
1913       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1914         {
1915           if ((outer_count > cutoff) || (inner_count > cutoff))
1916             {
1917 #if VERBOSE_TESTING
1918               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1919                   "Connecting peer %d to peer %d\n",
1920                   outer_count, inner_count);
1921 #endif
1922               connect_attempts += proc (pg, outer_count, inner_count, list,
1923                                         GNUNET_YES);
1924             }
1925         }
1926     }
1927   return connect_attempts;
1928 }
1929
1930 #if TOPOLOGY_HACK
1931 /**
1932  * Create a topology given a peer group (set of running peers)
1933  * and a connection processor.
1934  *
1935  * @param pg the peergroup to create the topology on
1936  * @param proc the connection processor to call to actually set
1937  *        up connections between two peers
1938  * @param list the peer list to use
1939  *
1940  * @return the number of connections that were set up
1941  *
1942  */
1943 static unsigned int
1944 create_nated_internet_copy(struct GNUNET_TESTING_PeerGroup *pg,
1945                            GNUNET_TESTING_ConnectionProcessor proc,
1946                            enum PeerLists list)
1947 {
1948   unsigned int outer_count, inner_count;
1949   unsigned int cutoff;
1950   int connect_attempts;
1951   double nat_percentage;
1952   char *p_string;
1953   unsigned int count;
1954   struct ProgressMeter *conn_meter;
1955
1956   nat_percentage = 0.6; /* FIXME: default percentage? */
1957   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1958                                                           "PERCENTAGE",
1959                                                           &p_string))
1960     {
1961       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1962         GNUNET_log (
1963                     GNUNET_ERROR_TYPE_WARNING,
1964                     _
1965                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1966                     p_string, "PERCENTAGE", "TESTING");
1967       GNUNET_free (p_string);
1968     }
1969
1970   cutoff = (unsigned int) (nat_percentage * pg->total);
1971   count = 0;
1972   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1973     {
1974       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1975         {
1976           if ((outer_count > cutoff) || (inner_count > cutoff))
1977             {
1978               count++;
1979             }
1980         }
1981     }
1982   conn_meter = create_meter (count, "NAT COPY", GNUNET_YES);
1983   connect_attempts = 0;
1984   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1985     {
1986       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1987         {
1988           if ((outer_count > cutoff) || (inner_count > cutoff))
1989             {
1990 #if VERBOSE_TESTING
1991               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1992                   "Connecting peer %d to peer %d\n",
1993                   outer_count, inner_count);
1994 #endif
1995               connect_attempts += proc (pg, outer_count, inner_count, list,
1996                                         GNUNET_YES);
1997               add_connections (pg, outer_count, inner_count, ALLOWED, GNUNET_NO);
1998               update_meter (conn_meter);
1999             }
2000         }
2001     }
2002   free_meter (conn_meter);
2003
2004   return connect_attempts;
2005 }
2006 #endif
2007
2008 /**
2009  * Create a topology given a peer group (set of running peers)
2010  * and a connection processor.
2011  *
2012  * @param pg the peergroup to create the topology on
2013  * @param proc the connection processor to call to actually set
2014  *        up connections between two peers
2015  * @param list the peer list to use
2016  *
2017  * @return the number of connections that were set up
2018  *
2019  */
2020 static unsigned int
2021 create_small_world(struct GNUNET_TESTING_PeerGroup *pg,
2022                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2023 {
2024   unsigned int i, j, k;
2025   unsigned int square;
2026   unsigned int rows;
2027   unsigned int cols;
2028   unsigned int toggle = 1;
2029   unsigned int nodeToConnect;
2030   unsigned int natLog;
2031   unsigned int node1Row;
2032   unsigned int node1Col;
2033   unsigned int node2Row;
2034   unsigned int node2Col;
2035   unsigned int distance;
2036   double probability, random, percentage;
2037   unsigned int smallWorldConnections;
2038   unsigned int small_world_it;
2039   char *p_string;
2040   int connect_attempts;
2041   square = floor (sqrt (pg->total));
2042   rows = square;
2043   cols = square;
2044
2045   percentage = 0.5; /* FIXME: default percentage? */
2046   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2047                                                           "PERCENTAGE",
2048                                                           &p_string))
2049     {
2050       if (sscanf (p_string, "%lf", &percentage) != 1)
2051         GNUNET_log (
2052                     GNUNET_ERROR_TYPE_WARNING,
2053                     _
2054                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2055                     p_string, "PERCENTAGE", "TESTING");
2056       GNUNET_free (p_string);
2057     }
2058   if (percentage < 0.0)
2059     {
2060       GNUNET_log (
2061                   GNUNET_ERROR_TYPE_WARNING,
2062                   _
2063                   ("Invalid value `%s' for option `%s' in section `%s': got %f, needed value greater than 0\n"),
2064                   "PERCENTAGE", "TESTING", percentage);
2065       percentage = 0.5;
2066     }
2067   probability = 0.5; /* FIXME: default percentage? */
2068   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2069                                                           "PROBABILITY",
2070                                                           &p_string))
2071     {
2072       if (sscanf (p_string, "%lf", &probability) != 1)
2073         GNUNET_log (
2074                     GNUNET_ERROR_TYPE_WARNING,
2075                     _
2076                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2077                     p_string, "PROBABILITY", "TESTING");
2078       GNUNET_free (p_string);
2079     }
2080   if (square * square != pg->total)
2081     {
2082       while (rows * cols < pg->total)
2083         {
2084           if (toggle % 2 == 0)
2085             rows++;
2086           else
2087             cols++;
2088
2089           toggle++;
2090         }
2091     }
2092 #if VERBOSE_TESTING
2093   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2094       _
2095       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2096       rows, cols);
2097 #endif
2098
2099   connect_attempts = 0;
2100   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2101    * to the node to its right and above.  Once this is over, we'll have our torus!
2102    * Special case for the last node (if the rows and columns are not equal), connect
2103    * to the first in the row to maintain topology.
2104    */
2105   for (i = 0; i < pg->total; i++)
2106     {
2107       /* First connect to the node to the right */
2108       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2109         nodeToConnect = i + 1;
2110       else if (i + 1 == pg->total)
2111         nodeToConnect = rows * cols - cols;
2112       else
2113         nodeToConnect = i - cols + 1;
2114
2115       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2116
2117       if (i < cols)
2118         {
2119           nodeToConnect = (rows * cols) - cols + i;
2120           if (nodeToConnect >= pg->total)
2121             nodeToConnect -= cols;
2122         }
2123       else
2124         nodeToConnect = i - cols;
2125
2126       if (nodeToConnect < pg->total)
2127         connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2128     }
2129   natLog = log (pg->total);
2130 #if VERBOSE_TESTING > 2
2131   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2132       _("natural log of %d is %d, will run %d iterations\n"),
2133       pg->total, natLog, (int) (natLog * percentage));
2134   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2135       _("Total connections added thus far: %u!\n"), connect_attempts);
2136 #endif
2137   smallWorldConnections = 0;
2138   small_world_it = (unsigned int) (natLog * percentage);
2139   if (small_world_it < 1)
2140     small_world_it = 1;
2141   GNUNET_assert (small_world_it > 0 && small_world_it < (unsigned int) -1);
2142   for (i = 0; i < small_world_it; i++)
2143     {
2144       for (j = 0; j < pg->total; j++)
2145         {
2146           /* Determine the row and column of node at position j on the 2d torus */
2147           node1Row = j / cols;
2148           node1Col = j - (node1Row * cols);
2149           for (k = 0; k < pg->total; k++)
2150             {
2151               /* Determine the row and column of node at position k on the 2d torus */
2152               node2Row = k / cols;
2153               node2Col = k - (node2Row * cols);
2154               /* Simple Cartesian distance */
2155               distance = abs (node1Row - node2Row) + abs (node1Col - node2Col);
2156               if (distance > 1)
2157                 {
2158                   /* Calculate probability as 1 over the square of the distance */
2159                   probability = 1.0 / (distance * distance);
2160                   /* Choose a random value between 0 and 1 */
2161                   random
2162                       = ((double) GNUNET_CRYPTO_random_u64 (
2163                                                             GNUNET_CRYPTO_QUALITY_WEAK,
2164                                                             UINT64_MAX))
2165                           / ((double) UINT64_MAX);
2166                   /* If random < probability, then connect the two nodes */
2167                   if (random < probability)
2168                     smallWorldConnections += proc (pg, j, k, list, GNUNET_YES);
2169
2170                 }
2171             }
2172         }
2173     }
2174   connect_attempts += smallWorldConnections;
2175 #if VERBOSE_TESTING > 2
2176   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2177       _("Total connections added for small world: %d!\n"),
2178       smallWorldConnections);
2179 #endif
2180   return connect_attempts;
2181 }
2182
2183 /**
2184  * Create a topology given a peer group (set of running peers)
2185  * and a connection processor.
2186  *
2187  * @param pg the peergroup to create the topology on
2188  * @param proc the connection processor to call to actually set
2189  *        up connections between two peers
2190  * @param list the peer list to use
2191  *
2192  * @return the number of connections that were set up
2193  *
2194  */
2195 static unsigned int
2196 create_erdos_renyi(struct GNUNET_TESTING_PeerGroup *pg,
2197                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2198 {
2199   double temp_rand;
2200   unsigned int outer_count;
2201   unsigned int inner_count;
2202   int connect_attempts;
2203   double probability;
2204   char *p_string;
2205
2206   probability = 0.5; /* FIXME: default percentage? */
2207   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2208                                                           "PROBABILITY",
2209                                                           &p_string))
2210     {
2211       if (sscanf (p_string, "%lf", &probability) != 1)
2212         GNUNET_log (
2213                     GNUNET_ERROR_TYPE_WARNING,
2214                     _
2215                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2216                     p_string, "PROBABILITY", "TESTING");
2217       GNUNET_free (p_string);
2218     }
2219   connect_attempts = 0;
2220   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2221     {
2222       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2223         {
2224           temp_rand
2225               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
2226                                                     UINT64_MAX))
2227                   / ((double) UINT64_MAX);
2228 #if VERBOSE_TESTING
2229           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2230               _("rand is %f probability is %f\n"), temp_rand,
2231               probability);
2232 #endif
2233           if (temp_rand < probability)
2234             {
2235               connect_attempts += proc (pg, outer_count, inner_count, list,
2236                                         GNUNET_YES);
2237             }
2238         }
2239     }
2240
2241   return connect_attempts;
2242 }
2243
2244 /**
2245  * Create a topology given a peer group (set of running peers)
2246  * and a connection processor.  This particular function creates
2247  * the connections for a 2d-torus, plus additional "closest"
2248  * connections per peer.
2249  *
2250  * @param pg the peergroup to create the topology on
2251  * @param proc the connection processor to call to actually set
2252  *        up connections between two peers
2253  * @param list the peer list to use
2254  *
2255  * @return the number of connections that were set up
2256  *
2257  */
2258 static unsigned int
2259 create_2d_torus(struct GNUNET_TESTING_PeerGroup *pg,
2260                 GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2261 {
2262   unsigned int i;
2263   unsigned int square;
2264   unsigned int rows;
2265   unsigned int cols;
2266   unsigned int toggle = 1;
2267   unsigned int nodeToConnect;
2268   int connect_attempts;
2269
2270   connect_attempts = 0;
2271
2272   square = floor (sqrt (pg->total));
2273   rows = square;
2274   cols = square;
2275
2276   if (square * square != pg->total)
2277     {
2278       while (rows * cols < pg->total)
2279         {
2280           if (toggle % 2 == 0)
2281             rows++;
2282           else
2283             cols++;
2284
2285           toggle++;
2286         }
2287     }
2288 #if VERBOSE_TESTING
2289   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2290       _
2291       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2292       rows, cols);
2293 #endif
2294   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2295    * to the node to its right and above.  Once this is over, we'll have our torus!
2296    * Special case for the last node (if the rows and columns are not equal), connect
2297    * to the first in the row to maintain topology.
2298    */
2299   for (i = 0; i < pg->total; i++)
2300     {
2301       /* First connect to the node to the right */
2302       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2303         nodeToConnect = i + 1;
2304       else if (i + 1 == pg->total)
2305         nodeToConnect = rows * cols - cols;
2306       else
2307         nodeToConnect = i - cols + 1;
2308 #if VERBOSE_TESTING
2309       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2310           "Connecting peer %d to peer %d\n", i, nodeToConnect);
2311 #endif
2312       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2313
2314       /* Second connect to the node immediately above */
2315       if (i < cols)
2316         {
2317           nodeToConnect = (rows * cols) - cols + i;
2318           if (nodeToConnect >= pg->total)
2319             nodeToConnect -= cols;
2320         }
2321       else
2322         nodeToConnect = i - cols;
2323
2324       if (nodeToConnect < pg->total)
2325         {
2326 #if VERBOSE_TESTING
2327           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2328               "Connecting peer %d to peer %d\n", i, nodeToConnect);
2329 #endif
2330           connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2331         }
2332
2333     }
2334
2335   return connect_attempts;
2336 }
2337
2338 /**
2339  * Create a topology given a peer group (set of running peers)
2340  * and a connection processor.
2341  *
2342  * @param pg the peergroup to create the topology on
2343  * @param proc the connection processor to call to actually set
2344  *        up connections between two peers
2345  * @param list the peer list to use
2346  * @param check does the connection processor need to check before
2347  *              performing an action on the list?
2348  *
2349  * @return the number of connections that were set up
2350  *
2351  */
2352 static unsigned int
2353 create_clique(struct GNUNET_TESTING_PeerGroup *pg,
2354               GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list,
2355               unsigned int check)
2356 {
2357   unsigned int outer_count;
2358   unsigned int inner_count;
2359   int connect_attempts;
2360   struct ProgressMeter *conn_meter;
2361   connect_attempts = 0;
2362
2363   conn_meter = create_meter ((((pg->total * pg->total) + pg->total) / 2)
2364       - pg->total, "Create Clique ", GNUNET_NO);
2365   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2366     {
2367       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2368         {
2369 #if VERBOSE_TESTING
2370           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2371               "Connecting peer %d to peer %d\n",
2372               outer_count, inner_count);
2373 #endif
2374           connect_attempts += proc (pg, outer_count, inner_count, list, check);
2375           update_meter (conn_meter);
2376         }
2377     }
2378   reset_meter (conn_meter);
2379   free_meter (conn_meter);
2380   return connect_attempts;
2381 }
2382
2383 #if !OLD
2384 /**
2385  * Iterator over hash map entries.
2386  *
2387  * @param cls closure the peer group
2388  * @param key the key stored in the hashmap is the
2389  *            index of the peer to connect to
2390  * @param value value in the hash map, handle to the peer daemon
2391  * @return GNUNET_YES if we should continue to
2392  *         iterate,
2393  *         GNUNET_NO if not.
2394  */
2395 static int
2396 unblacklist_iterator (void *cls,
2397     const GNUNET_HashCode * key,
2398     void *value)
2399   {
2400     struct UnblacklistContext *un_ctx = cls;
2401     uint32_t second_pos;
2402
2403     uid_from_hash (key, &second_pos);
2404
2405     unblacklist_connections(un_ctx->pg, un_ctx->first_uid, second_pos);
2406
2407     return GNUNET_YES;
2408   }
2409 #endif
2410
2411 /**
2412  * Create a blacklist topology based on the allowed topology
2413  * which disallows any connections not in the allowed topology
2414  * at the transport level.
2415  *
2416  * @param pg the peergroup to create the topology on
2417  * @param proc the connection processor to call to allow
2418  *        up connections between two peers
2419  *
2420  * @return the number of connections that were set up
2421  *
2422  */
2423 static unsigned int
2424 copy_allowed(struct GNUNET_TESTING_PeerGroup *pg,
2425              GNUNET_TESTING_ConnectionProcessor proc)
2426 {
2427   struct UnblacklistContext un_ctx;
2428   unsigned int count;
2429   unsigned int total;
2430   struct PeerConnection *iter;
2431
2432   un_ctx.pg = pg;
2433   total = 0;
2434   for (count = 0; count < pg->total - 1; count++)
2435     {
2436       un_ctx.first_uid = count;
2437 #if OLD
2438       iter = pg->peers[count].allowed_peers_head;
2439       while (iter != NULL)
2440         {
2441           remove_connections (pg, count, iter->index, BLACKLIST, GNUNET_YES);
2442           //unblacklist_connections(pg, count, iter->index);
2443           iter = iter->next;
2444         }
2445 #else
2446       total += GNUNET_CONTAINER_multihashmap_iterate(pg->peers[count].allowed_peers, &unblacklist_iterator, &un_ctx);
2447 #endif
2448     }
2449   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Unblacklisted %u peers\n", total);
2450   return total;
2451 }
2452
2453 /**
2454  * Create a topology given a peer group (set of running peers)
2455  * and a connection processor.
2456  *
2457  * @param pg the peergroup to create the topology on
2458  * @param proc the connection processor to call to actually set
2459  *        up connections between two peers
2460  * @param list which list should be modified
2461  *
2462  * @return the number of connections that were set up
2463  *
2464  */
2465 static unsigned int
2466 create_line(struct GNUNET_TESTING_PeerGroup *pg,
2467             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2468 {
2469   unsigned int count;
2470   int connect_attempts;
2471
2472   connect_attempts = 0;
2473
2474   /* Connect each peer to the next highest numbered peer */
2475   for (count = 0; count < pg->total - 1; count++)
2476     {
2477 #if VERBOSE_TESTING
2478       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2479           "Connecting peer %d to peer %d\n", count, count + 1);
2480 #endif
2481       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2482     }
2483
2484   return connect_attempts;
2485 }
2486
2487 /**
2488  * Create a topology given a peer group (set of running peers)
2489  * and a connection processor.
2490  *
2491  * @param pg the peergroup to create the topology on
2492  * @param filename the file to read topology information from
2493  * @param proc the connection processor to call to actually set
2494  *        up connections between two peers
2495  * @param list the peer list to use
2496  *
2497  * @return the number of connections that were set up
2498  *
2499  */
2500 static unsigned int
2501 create_from_file(struct GNUNET_TESTING_PeerGroup *pg, char *filename,
2502                  GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2503 {
2504   int connect_attempts;
2505   unsigned int first_peer_index;
2506   unsigned int second_peer_index;
2507   connect_attempts = 0;
2508   struct stat frstat;
2509   int count;
2510   char *data;
2511   char *buf;
2512   unsigned int total_peers;
2513
2514   enum States curr_state;
2515
2516   if (GNUNET_OK != GNUNET_DISK_file_test (filename))
2517     GNUNET_DISK_fn_write (filename, NULL, 0, GNUNET_DISK_PERM_USER_READ);
2518
2519   if ((0 != STAT (filename, &frstat)) || (frstat.st_size == 0))
2520     {
2521       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2522                   "Could not open file `%s' specified for topology!", filename);
2523       return connect_attempts;
2524     }
2525
2526   data = GNUNET_malloc_large (frstat.st_size);
2527   GNUNET_assert(data != NULL);
2528   if (frstat.st_size != GNUNET_DISK_fn_read (filename, data, frstat.st_size))
2529     {
2530       GNUNET_log (
2531                   GNUNET_ERROR_TYPE_ERROR,
2532                   "Could not read file %s specified for host list, ending test!",
2533                   filename);
2534       GNUNET_free (data);
2535       return connect_attempts;
2536     }
2537
2538   buf = data;
2539   count = 0;
2540   first_peer_index = 0;
2541   /* First line should contain a single integer, specifying the number of peers */
2542   /* Each subsequent line should contain this format PEER_INDEX:OTHER_PEER_INDEX[,...] */
2543   curr_state = NUM_PEERS;
2544   while (count < frstat.st_size - 1)
2545     {
2546       if ((buf[count] == '\n') || (buf[count] == ' '))
2547         {
2548           count++;
2549           continue;
2550         }
2551
2552       switch (curr_state)
2553         {
2554       case NUM_PEERS:
2555         errno = 0;
2556         total_peers = strtoul(&buf[count], NULL, 10);
2557         if (errno != 0)
2558           {
2559             GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2560                         "Failed to read number of peers from topology file!\n");
2561             GNUNET_free_non_null(data);
2562             return connect_attempts;
2563           }
2564         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2565                     "Read %u total peers in topology\n", total_peers);
2566         GNUNET_assert(total_peers == pg->total);
2567         curr_state = PEER_INDEX;
2568         while ((buf[count] != '\n') && (count < frstat.st_size - 1))
2569           count++;
2570         count++;
2571         break;
2572       case PEER_INDEX:
2573         errno = 0;
2574         first_peer_index = strtoul(&buf[count], NULL, 10);
2575         if (errno != 0)
2576           {
2577             GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2578                         "Failed to read peer index from topology file!\n");
2579             GNUNET_free_non_null(data);
2580             return connect_attempts;
2581           }
2582         while ((buf[count] != ':') && (count < frstat.st_size - 1))
2583           count++;
2584         count++;
2585         curr_state = OTHER_PEER_INDEX;
2586         break;
2587       case COLON:
2588         if (1 == sscanf (&buf[count], ":"))
2589           curr_state = OTHER_PEER_INDEX;
2590         count++;
2591         break;
2592       case OTHER_PEER_INDEX:
2593         errno = 0;
2594         second_peer_index = strtoul(&buf[count], NULL, 10);
2595         if (errno != 0)
2596           {
2597             GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2598                         "Failed to peer index from topology file!\n");
2599             GNUNET_free_non_null(data);
2600             return connect_attempts;
2601           }
2602         /* Assume file is written with first peer 1, but array index is 0 */
2603         connect_attempts += proc (pg, first_peer_index - 1, second_peer_index
2604                                   - 1, list, GNUNET_YES);
2605         while ((buf[count] != '\n') && (buf[count] != ',') && (count
2606             < frstat.st_size - 1))
2607           count++;
2608         if (buf[count] == '\n')
2609           {
2610             curr_state = PEER_INDEX;
2611           }
2612         else if (buf[count] != ',')
2613           {
2614             curr_state = OTHER_PEER_INDEX;
2615           }
2616         count++;
2617         break;
2618       default:
2619         GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2620                     "Found bad data in topology file while in state %d!\n",
2621                     curr_state);
2622         GNUNET_break(0);
2623         return connect_attempts;
2624         }
2625
2626     }
2627   return connect_attempts;
2628 }
2629
2630 /**
2631  * Create a topology given a peer group (set of running peers)
2632  * and a connection processor.
2633  *
2634  * @param pg the peergroup to create the topology on
2635  * @param proc the connection processor to call to actually set
2636  *        up connections between two peers
2637  * @param list the peer list to use
2638  *
2639  * @return the number of connections that were set up
2640  *
2641  */
2642 static unsigned int
2643 create_ring(struct GNUNET_TESTING_PeerGroup *pg,
2644             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2645 {
2646   unsigned int count;
2647   int connect_attempts;
2648
2649   connect_attempts = 0;
2650
2651   /* Connect each peer to the next highest numbered peer */
2652   for (count = 0; count < pg->total - 1; count++)
2653     {
2654 #if VERBOSE_TESTING
2655       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2656           "Connecting peer %d to peer %d\n", count, count + 1);
2657 #endif
2658       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2659     }
2660
2661   /* Connect the last peer to the first peer */
2662   connect_attempts += proc (pg, pg->total - 1, 0, list, GNUNET_YES);
2663
2664   return connect_attempts;
2665 }
2666
2667 #if !OLD
2668 /**
2669  * Iterator for writing friends of a peer to a file.
2670  *
2671  * @param cls closure, an open writable file handle
2672  * @param key the key the daemon was stored under
2673  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2674  *
2675  * @return GNUNET_YES to continue iteration
2676  *
2677  * TODO: Could replace friend_file_iterator and blacklist_file_iterator
2678  *       with a single file_iterator that takes a closure which contains
2679  *       the prefix to write before the peer.  Then this could be used
2680  *       for blacklisting multiple transports and writing the friend
2681  *       file.  I'm sure *someone* will complain loudly about other
2682  *       things that negate these functions even existing so no point in
2683  *       "fixing" now.
2684  */
2685 static int
2686 friend_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2687   {
2688     FILE *temp_friend_handle = cls;
2689     struct GNUNET_TESTING_Daemon *peer = value;
2690     struct GNUNET_PeerIdentity *temppeer;
2691     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2692
2693     temppeer = &peer->id;
2694     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2695     fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2696
2697     return GNUNET_YES;
2698   }
2699
2700 struct BlacklistContext
2701   {
2702     /*
2703      * The (open) file handle to write to
2704      */
2705     FILE *temp_file_handle;
2706
2707     /*
2708      * The transport that this peer will be blacklisted on.
2709      */
2710     char *transport;
2711   };
2712
2713 /**
2714  * Iterator for writing blacklist data to appropriate files.
2715  *
2716  * @param cls closure, an open writable file handle
2717  * @param key the key the daemon was stored under
2718  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2719  *
2720  * @return GNUNET_YES to continue iteration
2721  */
2722 static int
2723 blacklist_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2724   {
2725     struct BlacklistContext *blacklist_ctx = cls;
2726     struct GNUNET_TESTING_Daemon *peer = value;
2727     struct GNUNET_PeerIdentity *temppeer;
2728     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2729
2730     temppeer = &peer->id;
2731     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2732     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Writing entry %s:%s to file\n", blacklist_ctx->transport, (char *) &peer_enc);
2733     fprintf (blacklist_ctx->temp_file_handle, "%s:%s\n",
2734         blacklist_ctx->transport, (char *) &peer_enc);
2735
2736     return GNUNET_YES;
2737   }
2738 #endif
2739
2740 /*
2741  * Create the friend files based on the PeerConnection's
2742  * of each peer in the peer group, and copy the files
2743  * to the appropriate place
2744  *
2745  * @param pg the peer group we are dealing with
2746  */
2747 static int
2748 create_and_copy_friend_files(struct GNUNET_TESTING_PeerGroup *pg)
2749 {
2750   FILE *temp_friend_handle;
2751   unsigned int pg_iter;
2752   char *temp_service_path;
2753   struct GNUNET_OS_Process **procarr;
2754   char *arg;
2755   char *mytemp;
2756 #if NOT_STUPID
2757   enum GNUNET_OS_ProcessStatusType type;
2758   unsigned long return_code;
2759   int count;
2760   int max_wait = 10;
2761 #endif
2762   int ret;
2763
2764   ret = GNUNET_OK;
2765 #if OLD
2766   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2767   struct PeerConnection *conn_iter;
2768 #endif
2769   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2770   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2771     {
2772       mytemp = GNUNET_DISK_mktemp ("friends");
2773       GNUNET_assert (mytemp != NULL);
2774       temp_friend_handle = fopen (mytemp, "wt");
2775       GNUNET_assert (temp_friend_handle != NULL);
2776 #if OLD
2777       conn_iter = pg->peers[pg_iter].allowed_peers_head;
2778       while (conn_iter != NULL)
2779         {
2780           GNUNET_CRYPTO_hash_to_enc (
2781                                      &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2782                                      &peer_enc);
2783           fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2784           conn_iter = conn_iter->next;
2785         }
2786 #else
2787       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].allowed_peers,
2788           &friend_file_iterator,
2789           temp_friend_handle);
2790 #endif
2791       fclose (temp_friend_handle);
2792
2793       if (GNUNET_OK
2794           != GNUNET_CONFIGURATION_get_value_string (
2795                                                     pg->peers[pg_iter]. daemon->cfg,
2796                                                     "PATHS", "SERVICEHOME",
2797                                                     &temp_service_path))
2798         {
2799           GNUNET_log (
2800                       GNUNET_ERROR_TYPE_WARNING,
2801                       _
2802                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
2803                       "SERVICEHOME", "PATHS");
2804           if (UNLINK (mytemp) != 0)
2805             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
2806                 mytemp);
2807           GNUNET_free (mytemp);
2808           break;
2809         }
2810
2811       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
2812         {
2813           GNUNET_asprintf (&arg, "%s/friends", temp_service_path);
2814           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
2815                                                       mytemp, arg, NULL);
2816           GNUNET_assert(procarr[pg_iter] != NULL);
2817 #if VERBOSE_TESTING
2818           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2819               _("Copying file with command cp %s %s\n"), mytemp, arg);
2820 #endif
2821           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2822           GNUNET_OS_process_close (procarr[pg_iter]);
2823           GNUNET_free (arg);
2824         }
2825       else /* Remote, scp the file to the correct place */
2826         {
2827           if (NULL != pg->peers[pg_iter].daemon->username)
2828             GNUNET_asprintf (&arg, "%s@%s:%s/friends",
2829                              pg->peers[pg_iter].daemon->username,
2830                              pg->peers[pg_iter].daemon->hostname,
2831                              temp_service_path);
2832           else
2833             GNUNET_asprintf (&arg, "%s:%s/friends",
2834                              pg->peers[pg_iter].daemon->hostname,
2835                              temp_service_path);
2836           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
2837                                                       mytemp, arg, NULL);
2838           GNUNET_assert(procarr[pg_iter] != NULL);
2839           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2840           GNUNET_OS_process_close (procarr[pg_iter]);
2841           if (ret != GNUNET_OK)
2842             return ret;
2843           procarr[pg_iter] = NULL;
2844 #if VERBOSE_TESTING
2845           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2846               _("Copying file with command scp %s %s\n"), mytemp,
2847               arg);
2848 #endif
2849           GNUNET_free (arg);
2850         }
2851       GNUNET_free (temp_service_path);
2852       GNUNET_free (mytemp);
2853     }
2854
2855 #if NOT_STUPID
2856   count = 0;
2857   ret = GNUNET_SYSERR;
2858   while ((count < max_wait) && (ret != GNUNET_OK))
2859     {
2860       ret = GNUNET_OK;
2861       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2862         {
2863 #if VERBOSE_TESTING
2864           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2865               _("Checking copy status of file %d\n"), pg_iter);
2866 #endif
2867           if (procarr[pg_iter] != NULL) /* Check for already completed! */
2868             {
2869               if (GNUNET_OS_process_status
2870                   (procarr[pg_iter], &type, &return_code) != GNUNET_OK)
2871                 {
2872                   ret = GNUNET_SYSERR;
2873                 }
2874               else if ((type != GNUNET_OS_PROCESS_EXITED)
2875                   || (return_code != 0))
2876                 {
2877                   ret = GNUNET_SYSERR;
2878                 }
2879               else
2880                 {
2881                   GNUNET_OS_process_close (procarr[pg_iter]);
2882                   procarr[pg_iter] = NULL;
2883 #if VERBOSE_TESTING
2884                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2885                       _("File %d copied\n"), pg_iter);
2886 #endif
2887                 }
2888             }
2889         }
2890       count++;
2891       if (ret == GNUNET_SYSERR)
2892         {
2893           /* FIXME: why sleep here? -CG */
2894           sleep (1);
2895         }
2896     }
2897
2898 #if VERBOSE_TESTING
2899   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2900       _("Finished copying all friend files!\n"));
2901 #endif
2902 #endif
2903   GNUNET_free (procarr);
2904   return ret;
2905 }
2906
2907 /*
2908  * Create the blacklist files based on the PeerConnection's
2909  * of each peer in the peer group, and copy the files
2910  * to the appropriate place.
2911  *
2912  * @param pg the peer group we are dealing with
2913  * @param transports space delimited list of transports to blacklist
2914  */
2915 static int
2916 create_and_copy_blacklist_files(struct GNUNET_TESTING_PeerGroup *pg,
2917                                 const char *transports)
2918 {
2919   FILE *temp_file_handle;
2920   unsigned int pg_iter;
2921   char *temp_service_path;
2922   struct GNUNET_OS_Process **procarr;
2923   char *arg;
2924   char *mytemp;
2925   enum GNUNET_OS_ProcessStatusType type;
2926   unsigned long return_code;
2927   int count;
2928   int ret;
2929   int max_wait = 10;
2930   int transport_len;
2931   unsigned int i;
2932   char *pos;
2933   char *temp_transports;
2934   int entry_count;
2935 #if OLD
2936   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2937   struct PeerConnection *conn_iter;
2938 #else
2939   static struct BlacklistContext blacklist_ctx;
2940 #endif
2941
2942   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2943   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2944     {
2945       mytemp = GNUNET_DISK_mktemp ("blacklist");
2946       GNUNET_assert (mytemp != NULL);
2947       temp_file_handle = fopen (mytemp, "wt");
2948       GNUNET_assert (temp_file_handle != NULL);
2949       temp_transports = GNUNET_strdup (transports);
2950 #if !OLD
2951       blacklist_ctx.temp_file_handle = temp_file_handle;
2952 #endif
2953       transport_len = strlen (temp_transports) + 1;
2954       pos = NULL;
2955
2956       for (i = 0; i < transport_len; i++)
2957         {
2958           if ((temp_transports[i] == ' ') && (pos == NULL))
2959             continue; /* At start of string (whitespace) */
2960           else if ((temp_transports[i] == ' ') || (temp_transports[i] == '\0')) /* At end of string */
2961             {
2962               temp_transports[i] = '\0';
2963 #if OLD
2964               conn_iter = pg->peers[pg_iter].blacklisted_peers_head;
2965               while (conn_iter != NULL)
2966                 {
2967                   GNUNET_CRYPTO_hash_to_enc (
2968                                              &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2969                                              &peer_enc);
2970                   fprintf (temp_file_handle, "%s:%s\n", pos, (char *) &peer_enc);
2971                   conn_iter = conn_iter->next;
2972                   entry_count++;
2973                 }
2974 #else
2975               blacklist_ctx.transport = pos;
2976               entry_count = GNUNET_CONTAINER_multihashmap_iterate (pg->
2977                   peers
2978                   [pg_iter].blacklisted_peers,
2979                   &blacklist_file_iterator,
2980                   &blacklist_ctx);
2981 #endif
2982               pos = NULL;
2983             } /* At beginning of actual string */
2984           else if (pos == NULL)
2985             {
2986               pos = &temp_transports[i];
2987             }
2988         }
2989
2990       GNUNET_free (temp_transports);
2991       fclose (temp_file_handle);
2992
2993       if (GNUNET_OK
2994           != GNUNET_CONFIGURATION_get_value_string (
2995                                                     pg->peers[pg_iter]. daemon->cfg,
2996                                                     "PATHS", "SERVICEHOME",
2997                                                     &temp_service_path))
2998         {
2999           GNUNET_log (
3000                       GNUNET_ERROR_TYPE_WARNING,
3001                       _
3002                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
3003                       "SERVICEHOME", "PATHS");
3004           if (UNLINK (mytemp) != 0)
3005             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
3006                 mytemp);
3007           GNUNET_free (mytemp);
3008           break;
3009         }
3010
3011       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
3012         {
3013           GNUNET_asprintf (&arg, "%s/blacklist", temp_service_path);
3014           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
3015                                                       mytemp, arg, NULL);
3016 #if VERBOSE_TESTING
3017           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3018               _("Copying file with command cp %s %s\n"), mytemp, arg);
3019 #endif
3020
3021           GNUNET_free (arg);
3022         }
3023       else /* Remote, scp the file to the correct place */
3024         {
3025           if (NULL != pg->peers[pg_iter].daemon->username)
3026             GNUNET_asprintf (&arg, "%s@%s:%s/blacklist",
3027                              pg->peers[pg_iter].daemon->username,
3028                              pg->peers[pg_iter].daemon->hostname,
3029                              temp_service_path);
3030           else
3031             GNUNET_asprintf (&arg, "%s:%s/blacklist",
3032                              pg->peers[pg_iter].daemon->hostname,
3033                              temp_service_path);
3034           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
3035                                                       mytemp, arg, NULL);
3036           GNUNET_assert(procarr[pg_iter] != NULL);
3037           GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: add scheduled blacklist file copy that parallelizes file copying! */
3038
3039 #if VERBOSE_TESTING
3040           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3041               _("Copying file with command scp %s %s\n"), mytemp,
3042               arg);
3043 #endif
3044           GNUNET_free (arg);
3045         }
3046       GNUNET_free (temp_service_path);
3047       GNUNET_free (mytemp);
3048     }
3049
3050   count = 0;
3051   ret = GNUNET_SYSERR;
3052   while ((count < max_wait) && (ret != GNUNET_OK))
3053     {
3054       ret = GNUNET_OK;
3055       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3056         {
3057 #if VERBOSE_TESTING
3058           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3059               _("Checking copy status of file %d\n"), pg_iter);
3060 #endif
3061           if (procarr[pg_iter] != NULL) /* Check for already completed! */
3062             {
3063               if (GNUNET_OS_process_status (procarr[pg_iter], &type,
3064                                             &return_code) != GNUNET_OK)
3065                 {
3066                   ret = GNUNET_SYSERR;
3067                 }
3068               else if ((type != GNUNET_OS_PROCESS_EXITED) || (return_code != 0))
3069                 {
3070                   ret = GNUNET_SYSERR;
3071                 }
3072               else
3073                 {
3074                   GNUNET_OS_process_close (procarr[pg_iter]);
3075                   procarr[pg_iter] = NULL;
3076 #if VERBOSE_TESTING
3077                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3078                       _("File %d copied\n"), pg_iter);
3079 #endif
3080                 }
3081             }
3082         }
3083       count++;
3084       if (ret == GNUNET_SYSERR)
3085         {
3086           /* FIXME: why sleep here? -CG */
3087           sleep (1);
3088         }
3089     }
3090
3091 #if VERBOSE_TESTING
3092   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3093       _("Finished copying all blacklist files!\n"));
3094 #endif
3095   GNUNET_free (procarr);
3096   return ret;
3097 }
3098
3099 /* Forward Declaration */
3100 static void
3101 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3102
3103 /**
3104  * Choose a random peer's next connection to create, and
3105  * call schedule_connect to set up the connect task.
3106  *
3107  * @param ct_ctx the overall connection context
3108  */
3109 static void
3110 preschedule_connect(struct GNUNET_TESTING_PeerGroup *pg)
3111 {
3112   struct ConnectTopologyContext *ct_ctx = &pg->ct_ctx;
3113   struct PeerConnection *connection_iter;
3114   struct ConnectContext *connect_context;
3115   uint32_t random_peer;
3116
3117   if (ct_ctx->remaining_connections == 0)
3118     return;
3119   random_peer
3120       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, pg->total);
3121   while (pg->peers[random_peer].connect_peers_head == NULL)
3122     random_peer = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3123                                             pg->total);
3124
3125   connection_iter = pg->peers[random_peer].connect_peers_head;
3126   connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3127   connect_context->first_index = random_peer;
3128   connect_context->second_index = connection_iter->index;
3129   connect_context->ct_ctx = ct_ctx;
3130   GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3131   GNUNET_CONTAINER_DLL_remove(pg->peers[random_peer].connect_peers_head, pg->peers[random_peer].connect_peers_tail, connection_iter);
3132   GNUNET_free(connection_iter);
3133   ct_ctx->remaining_connections--;
3134 }
3135
3136 #if USE_SEND_HELLOS
3137 /* Forward declaration */
3138 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3139
3140 /**
3141  * Close connections and free the hello context.
3142  *
3143  * @param cls the 'struct SendHelloContext *'
3144  * @param tc scheduler context
3145  */
3146 static void
3147 free_hello_context (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3148   {
3149     struct SendHelloContext *send_hello_context = cls;
3150     if (send_hello_context->peer->daemon->server != NULL)
3151       {
3152         GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3153         send_hello_context->peer->daemon->server = NULL;
3154       }
3155     if (send_hello_context->peer->daemon->th != NULL)
3156       {
3157         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3158         send_hello_context->peer->daemon->th = NULL;
3159       }
3160     if (send_hello_context->core_connect_task != GNUNET_SCHEDULER_NO_TASK)
3161       {
3162         GNUNET_SCHEDULER_cancel(send_hello_context->core_connect_task);
3163         send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3164       }
3165     send_hello_context->pg->outstanding_connects--;
3166     GNUNET_free(send_hello_context);
3167   }
3168
3169 /**
3170  * For peers that haven't yet connected, notify
3171  * the caller that they have failed (timeout).
3172  *
3173  * @param cls the 'struct SendHelloContext *'
3174  * @param tc scheduler context
3175  */
3176 static void
3177 notify_remaining_connections_failed (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3178   {
3179     struct SendHelloContext *send_hello_context = cls;
3180     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3181     struct PeerConnection *connection;
3182
3183     GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3184     send_hello_context->peer->daemon->server = NULL;
3185
3186     connection = send_hello_context->peer->connect_peers_head;
3187
3188     while (connection != NULL)
3189       {
3190         if (pg->notify_connection != NULL)
3191           {
3192             pg->notify_connection(pg->notify_connection_cls,
3193                 &send_hello_context->peer->daemon->id,
3194                 &pg->peers[connection->index].daemon->id,
3195                 0, /* FIXME */
3196                 send_hello_context->peer->daemon->cfg,
3197                 pg->peers[connection->index].daemon->cfg,
3198                 send_hello_context->peer->daemon,
3199                 pg->peers[connection->index].daemon,
3200                 "Peers failed to connect (timeout)");
3201           }
3202         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3203         GNUNET_free(connection);
3204         connection = connection->next;
3205       }
3206     GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3207 #if BAD
3208     other_peer = &pg->peers[connection->index];
3209 #endif
3210   }
3211
3212 /**
3213  * For peers that haven't yet connected, send
3214  * CORE connect requests.
3215  *
3216  * @param cls the 'struct SendHelloContext *'
3217  * @param tc scheduler context
3218  */
3219 static void
3220 send_core_connect_requests (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3221   {
3222     struct SendHelloContext *send_hello_context = cls;
3223     struct PeerConnection *conn;
3224     GNUNET_assert(send_hello_context->peer->daemon->server != NULL);
3225
3226     send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3227
3228     send_hello_context->connect_attempts++;
3229     if (send_hello_context->connect_attempts < send_hello_context->pg->ct_ctx.connect_attempts)
3230       {
3231         conn = send_hello_context->peer->connect_peers_head;
3232         while (conn != NULL)
3233           {
3234             GNUNET_CORE_peer_request_connect(send_hello_context->peer->daemon->server,
3235                 GNUNET_TIME_relative_get_forever(),
3236                 &send_hello_context->pg->peers[conn->index].daemon->id,
3237                 NULL,
3238                 NULL);
3239             conn = conn->next;
3240           }
3241         send_hello_context->core_connect_task = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_relative_divide(send_hello_context->pg->ct_ctx.connect_timeout, send_hello_context->pg->ct_ctx.connect_attempts) ,
3242             &send_core_connect_requests,
3243             send_hello_context);
3244       }
3245     else
3246       {
3247         GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Timeout before all connections created, marking rest as failed!\n");
3248         GNUNET_SCHEDULER_add_now(&notify_remaining_connections_failed, send_hello_context);
3249       }
3250
3251   }
3252
3253 /**
3254  * Success, connection is up.  Signal client our success.
3255  *
3256  * @param cls our "struct SendHelloContext"
3257  * @param peer identity of the peer that has connected
3258  * @param atsi performance information
3259  *
3260  * FIXME: remove peers from BOTH lists, call notify twice, should
3261  * double the speed of connections as long as the list iteration
3262  * doesn't take too long!
3263  */
3264 static void
3265 core_connect_notify (void *cls,
3266     const struct GNUNET_PeerIdentity *peer,
3267     const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3268   {
3269     struct SendHelloContext *send_hello_context = cls;
3270     struct PeerConnection *connection;
3271     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3272 #if BAD
3273     struct PeerData *other_peer;
3274 #endif
3275 #if DEBUG_TESTING
3276     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3277         "Connected peer %s to peer %s\n",
3278         ctx->d1->shortname, GNUNET_i2s(peer));
3279 #endif
3280
3281     if (0 == memcmp(&send_hello_context->peer->daemon->id, peer, sizeof(struct GNUNET_PeerIdentity)))
3282     return;
3283
3284     connection = send_hello_context->peer->connect_peers_head;
3285 #if BAD
3286     other_peer = NULL;
3287 #endif
3288
3289     while ((connection != NULL) &&
3290         (0 != memcmp(&pg->peers[connection->index].daemon->id, peer, sizeof(struct GNUNET_PeerIdentity))))
3291       {
3292         connection = connection->next;
3293       }
3294
3295     if (connection == NULL)
3296       {
3297         GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Connected peer %s to %s, not in list (no problem(?))\n", GNUNET_i2s(peer), send_hello_context->peer->daemon->shortname);
3298       }
3299     else
3300       {
3301 #if BAD
3302         other_peer = &pg->peers[connection->index];
3303 #endif
3304         if (pg->notify_connection != NULL)
3305           {
3306             pg->notify_connection(pg->notify_connection_cls,
3307                 &send_hello_context->peer->daemon->id,
3308                 peer,
3309                 0, /* FIXME */
3310                 send_hello_context->peer->daemon->cfg,
3311                 pg->peers[connection->index].daemon->cfg,
3312                 send_hello_context->peer->daemon,
3313                 pg->peers[connection->index].daemon,
3314                 NULL);
3315           }
3316         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3317         GNUNET_free(connection);
3318       }
3319
3320 #if BAD
3321     /* Notify of reverse connection and remove from other peers list of outstanding */
3322     if (other_peer != NULL)
3323       {
3324         connection = other_peer->connect_peers_head;
3325         while ((connection != NULL) &&
3326             (0 != memcmp(&send_hello_context->peer->daemon->id, &pg->peers[connection->index].daemon->id, sizeof(struct GNUNET_PeerIdentity))))
3327           {
3328             connection = connection->next;
3329           }
3330         if (connection != NULL)
3331           {
3332             if (pg->notify_connection != NULL)
3333               {
3334                 pg->notify_connection(pg->notify_connection_cls,
3335                     peer,
3336                     &send_hello_context->peer->daemon->id,
3337                     0, /* FIXME */
3338                     pg->peers[connection->index].daemon->cfg,
3339                     send_hello_context->peer->daemon->cfg,
3340                     pg->peers[connection->index].daemon,
3341                     send_hello_context->peer->daemon,
3342                     NULL);
3343               }
3344
3345             GNUNET_CONTAINER_DLL_remove(other_peer->connect_peers_head, other_peer->connect_peers_tail, connection);
3346             GNUNET_free(connection);
3347           }
3348       }
3349 #endif
3350
3351     if (send_hello_context->peer->connect_peers_head == NULL)
3352       {
3353         GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3354       }
3355   }
3356
3357 /**
3358  * Notify of a successful connection to the core service.
3359  *
3360  * @param cls a struct SendHelloContext *
3361  * @param server handle to the core service
3362  * @param my_identity the peer identity of this peer
3363  * @param publicKey the public key of the peer
3364  */
3365 void
3366 core_init (void *cls,
3367     struct GNUNET_CORE_Handle * server,
3368     const struct GNUNET_PeerIdentity *
3369     my_identity,
3370     const struct
3371     GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
3372     publicKey)
3373   {
3374     struct SendHelloContext *send_hello_context = cls;
3375     send_hello_context->core_ready = GNUNET_YES;
3376   }
3377
3378 /**
3379  * Function called once a hello has been sent
3380  * to the transport, move on to the next one
3381  * or go away forever.
3382  *
3383  * @param cls the 'struct SendHelloContext *'
3384  * @param tc scheduler context
3385  */
3386 static void
3387 hello_sent_callback (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3388   {
3389     struct SendHelloContext *send_hello_context = cls;
3390     //unsigned int pg_iter;
3391     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3392       {
3393         GNUNET_free(send_hello_context);
3394         return;
3395       }
3396
3397     send_hello_context->pg->remaining_hellos--;
3398 #if DEBUG_TESTING
3399     GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Sent HELLO, have %d remaining!\n", send_hello_context->pg->remaining_hellos);
3400 #endif
3401     if (send_hello_context->peer_pos == NULL) /* All HELLOs (for this peer!) have been transmitted! */
3402       {
3403 #if DEBUG_TESTING
3404         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "All hellos for this peer sent, disconnecting transport!\n");
3405 #endif
3406         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3407         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3408         send_hello_context->peer->daemon->th = NULL;
3409
3410         /*if (send_hello_context->pg->remaining_hellos == 0)
3411          {
3412          for (pg_iter = 0; pg_iter < send_hello_context->pg->max_outstanding_connections; pg_iter++)
3413          {
3414          preschedule_connect(&send_hello_context->pg->ct_ctx);
3415          }
3416          }
3417          */
3418         GNUNET_assert (send_hello_context->peer->daemon->server == NULL);
3419         send_hello_context->peer->daemon->server = GNUNET_CORE_connect(send_hello_context->peer->cfg,
3420             1,
3421             send_hello_context,
3422             &core_init,
3423             &core_connect_notify,
3424             NULL,
3425             NULL,
3426             NULL, GNUNET_NO,
3427             NULL, GNUNET_NO,
3428             no_handlers);
3429
3430         send_hello_context->core_connect_task = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_relative_divide(send_hello_context->pg->ct_ctx.connect_timeout, send_hello_context->pg->ct_ctx.connect_attempts),
3431             &send_core_connect_requests,
3432             send_hello_context);
3433       }
3434     else
3435     GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3436   }
3437
3438 /**
3439  * Connect to a peer, give it all the HELLO's of those peers
3440  * we will later ask it to connect to.
3441  *
3442  * @param ct_ctx the overall connection context
3443  */
3444 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3445   {
3446     struct SendHelloContext *send_hello_context = cls;
3447     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3448
3449     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3450       {
3451         GNUNET_free(send_hello_context);
3452         return;
3453       }
3454
3455     GNUNET_assert(send_hello_context->peer_pos != NULL); /* All of the HELLO sends to be scheduled have been scheduled! */
3456
3457     if (((send_hello_context->peer->daemon->th == NULL) &&
3458             (pg->outstanding_connects > pg->max_outstanding_connections)) ||
3459         (pg->stop_connects == GNUNET_YES))
3460       {
3461 #if VERBOSE_TESTING > 2
3462         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3463             _
3464             ("Delaying connect, we have too many outstanding connections!\n"));
3465 #endif
3466         GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3467             (GNUNET_TIME_UNIT_MILLISECONDS, 100),
3468             &schedule_send_hellos, send_hello_context);
3469       }
3470     else
3471       {
3472 #if VERBOSE_TESTING > 2
3473         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3474             _("Creating connection, outstanding_connections is %d\n"),
3475             outstanding_connects);
3476 #endif
3477         if (send_hello_context->peer->daemon->th == NULL)
3478           {
3479             pg->outstanding_connects++; /* Actual TRANSPORT, CORE connections! */
3480             send_hello_context->peer->daemon->th
3481                 = GNUNET_TRANSPORT_connect (send_hello_context->peer->cfg, NULL,
3482                                             send_hello_context, NULL, NULL, NULL);
3483           }
3484 #if DEBUG_TESTING
3485         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3486             _("Offering Hello of peer %s to peer %s\n"),
3487             send_hello_context->peer->daemon->shortname, pg->peers[send_hello_context->peer_pos->index].daemon->shortname);
3488 #endif
3489         GNUNET_TRANSPORT_offer_hello(send_hello_context->peer->daemon->th,
3490             (const struct GNUNET_MessageHeader *)pg->peers[send_hello_context->peer_pos->index].daemon->hello,
3491             &hello_sent_callback,
3492             send_hello_context);
3493         send_hello_context->peer_pos = send_hello_context->peer_pos->next;
3494         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3495       }
3496   }
3497 #endif
3498
3499 /**
3500  * Internal notification of a connection, kept so that we can ensure some connections
3501  * happen instead of flooding all testing daemons with requests to connect.
3502  */
3503 static void
3504 internal_connect_notify(void *cls, const struct GNUNET_PeerIdentity *first,
3505                         const struct GNUNET_PeerIdentity *second,
3506                         uint32_t distance,
3507                         const struct GNUNET_CONFIGURATION_Handle *first_cfg,
3508                         const struct GNUNET_CONFIGURATION_Handle *second_cfg,
3509                         struct GNUNET_TESTING_Daemon *first_daemon,
3510                         struct GNUNET_TESTING_Daemon *second_daemon,
3511                         const char *emsg)
3512 {
3513   struct ConnectContext *connect_ctx = cls;
3514   struct ConnectTopologyContext *ct_ctx = connect_ctx->ct_ctx;
3515   struct GNUNET_TESTING_PeerGroup *pg = ct_ctx->pg;
3516   struct PeerConnection *connection;
3517   pg->outstanding_connects--;
3518
3519   /*
3520    * Check whether the inverse connection has been scheduled yet,
3521    * if not, we can remove it from the other peers list and avoid
3522    * even trying to connect them again!
3523    */
3524   connection = pg->peers[connect_ctx->second_index].connect_peers_head;
3525 #if BAD
3526   other_peer = NULL;
3527 #endif
3528
3529   while ((connection != NULL) && (0
3530       != memcmp (first, &pg->peers[connection->index].daemon->id,
3531                  sizeof(struct GNUNET_PeerIdentity))))
3532     {
3533       connection = connection->next;
3534     }
3535
3536   if (connection != NULL) /* Can safely remove! */
3537     {
3538       ct_ctx->remaining_connections--;
3539       if (pg->notify_connection != NULL) /* Notify of reverse connection */
3540         pg->notify_connection (pg->notify_connection_cls, second, first,
3541                                distance, second_cfg, first_cfg, second_daemon,
3542                                first_daemon, emsg);
3543
3544       GNUNET_CONTAINER_DLL_remove(pg->peers[connect_ctx->second_index].connect_peers_head, pg->peers[connect_ctx->second_index].connect_peers_tail, connection);
3545       GNUNET_free(connection);
3546     }
3547
3548   if (ct_ctx->remaining_connections == 0)
3549     {
3550       if (ct_ctx->notify_connections_done != NULL)
3551         ct_ctx->notify_connections_done (ct_ctx->notify_cls, NULL);
3552     }
3553   else
3554     preschedule_connect (pg);
3555
3556   if (pg->notify_connection != NULL)
3557     pg->notify_connection (pg->notify_connection_cls, first, second, distance,
3558                            first_cfg, second_cfg, first_daemon, second_daemon,
3559                            emsg);
3560
3561   GNUNET_free(connect_ctx);
3562 }
3563
3564 /**
3565  * Either delay a connection (because there are too many outstanding)
3566  * or schedule it for right now.
3567  *
3568  * @param cls a connection context
3569  * @param tc the task runtime context
3570  */
3571 static void
3572 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3573 {
3574   struct ConnectContext *connect_context = cls;
3575   struct GNUNET_TESTING_PeerGroup *pg = connect_context->ct_ctx->pg;
3576
3577   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3578     return;
3579
3580   if ((pg->outstanding_connects > pg->max_outstanding_connections)
3581       || (pg->stop_connects == GNUNET_YES))
3582     {
3583 #if VERBOSE_TESTING
3584       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3585           _
3586           ("Delaying connect, we have too many outstanding connections!\n"));
3587 #endif
3588       GNUNET_SCHEDULER_add_delayed (
3589                                     GNUNET_TIME_relative_multiply (
3590                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
3591                                                                    100),
3592                                     &schedule_connect, connect_context);
3593     }
3594   else
3595     {
3596 #if VERBOSE_TESTING
3597       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3598           _("Creating connection, outstanding_connections is %d (max %d)\n"),
3599           pg->outstanding_connects, pg->max_outstanding_connections);
3600 #endif
3601       pg->outstanding_connects++;
3602       pg->total_connects_scheduled++;
3603       GNUNET_TESTING_daemons_connect (
3604                                       pg->peers[connect_context->first_index].daemon,
3605                                       pg->peers[connect_context->second_index].daemon,
3606                                       connect_context->ct_ctx->connect_timeout,
3607                                       connect_context->ct_ctx->connect_attempts,
3608 #if USE_SEND_HELLOS
3609                                       GNUNET_NO,
3610 #else
3611                                       GNUNET_YES,
3612 #endif
3613                                       &internal_connect_notify, connect_context); /* FIXME: free connect context! */
3614     }
3615 }
3616
3617 #if !OLD
3618 /**
3619  * Iterator for actually scheduling connections to be created
3620  * between two peers.
3621  *
3622  * @param cls closure, a GNUNET_TESTING_Daemon
3623  * @param key the key the second Daemon was stored under
3624  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3625  *
3626  * @return GNUNET_YES to continue iteration
3627  */
3628 static int
3629 connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3630   {
3631     struct ConnectTopologyContext *ct_ctx = cls;
3632     struct PeerData *first = ct_ctx->first;
3633     struct GNUNET_TESTING_Daemon *second = value;
3634     struct ConnectContext *connect_context;
3635
3636     connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3637     connect_context->first = first->daemon;
3638     connect_context->second = second;
3639     connect_context->ct_ctx = ct_ctx;
3640     GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3641
3642     return GNUNET_YES;
3643   }
3644 #endif
3645
3646 #if !OLD
3647 /**
3648  * Iterator for copying all entries in the allowed hashmap to the
3649  * connect hashmap.
3650  *
3651  * @param cls closure, a GNUNET_TESTING_Daemon
3652  * @param key the key the second Daemon was stored under
3653  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3654  *
3655  * @return GNUNET_YES to continue iteration
3656  */
3657 static int
3658 copy_topology_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3659   {
3660     struct PeerData *first = cls;
3661
3662     GNUNET_assert (GNUNET_OK ==
3663         GNUNET_CONTAINER_multihashmap_put (first->connect_peers, key,
3664             value,
3665             GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
3666
3667     return GNUNET_YES;
3668   }
3669 #endif
3670
3671 /**
3672  * Make the peers to connect the same as those that are allowed to be
3673  * connected.
3674  *
3675  * @param pg the peer group
3676  */
3677 static int
3678 copy_allowed_topology(struct GNUNET_TESTING_PeerGroup *pg)
3679 {
3680   unsigned int pg_iter;
3681   int ret;
3682   int total;
3683 #if OLD
3684   struct PeerConnection *iter;
3685 #endif
3686   total = 0;
3687   ret = 0;
3688   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3689     {
3690 #if OLD
3691       iter = pg->peers[pg_iter].allowed_peers_head;
3692       while (iter != NULL)
3693         {
3694           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3695                       "Creating connection between %d and %d\n", pg_iter,
3696                       iter->index);
3697           total += add_connections (pg, pg_iter, iter->index, CONNECT,
3698                                     GNUNET_YES);
3699           //total += add_actual_connections(pg, pg_iter, iter->index);
3700           iter = iter->next;
3701         }
3702 #else
3703       ret =
3704       GNUNET_CONTAINER_multihashmap_iterate (pg->
3705           peers[pg_iter].allowed_peers,
3706           &copy_topology_iterator,
3707           &pg->peers[pg_iter]);
3708 #endif
3709       if (GNUNET_SYSERR == ret)
3710         return GNUNET_SYSERR;
3711
3712       total = total + ret;
3713     }
3714
3715   return total;
3716 }
3717
3718 /**
3719  * Connect the topology as specified by the PeerConnection's
3720  * of each peer in the peer group
3721  *
3722  * @param pg the peer group we are dealing with
3723  * @param connect_timeout how long try connecting two peers
3724  * @param connect_attempts how many times (max) to attempt
3725  * @param notify_callback callback to notify when finished
3726  * @param notify_cls closure for notify callback
3727  *
3728  * @return the number of connections that will be attempted
3729  */
3730 static int
3731 connect_topology(struct GNUNET_TESTING_PeerGroup *pg,
3732                  struct GNUNET_TIME_Relative connect_timeout,
3733                  unsigned int connect_attempts,
3734                  GNUNET_TESTING_NotifyCompletion notify_callback,
3735                  void *notify_cls)
3736 {
3737   unsigned int pg_iter;
3738   unsigned int total;
3739
3740 #if OLD
3741   struct PeerConnection *connection_iter;
3742 #endif
3743 #if USE_SEND_HELLOS
3744   struct SendHelloContext *send_hello_context;
3745 #endif
3746
3747   total = 0;
3748   pg->ct_ctx.notify_connections_done = notify_callback;
3749   pg->ct_ctx.notify_cls = notify_cls;
3750   pg->ct_ctx.pg = pg;
3751
3752   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3753     {
3754 #if OLD
3755       connection_iter = pg->peers[pg_iter].connect_peers_head;
3756       while (connection_iter != NULL)
3757         {
3758           connection_iter = connection_iter->next;
3759           total++;
3760         }
3761 #else
3762       total +=
3763       GNUNET_CONTAINER_multihashmap_size (pg->peers[pg_iter].connect_peers);
3764 #endif
3765     }
3766
3767   if (total == 0)
3768     return total;
3769
3770   pg->ct_ctx.connect_timeout = connect_timeout;
3771   pg->ct_ctx.connect_attempts = connect_attempts;
3772   pg->ct_ctx.remaining_connections = total;
3773
3774 #if USE_SEND_HELLOS
3775   /* First give all peers the HELLO's of other peers (connect to first peer's transport service, give HELLO's of other peers, continue...) */
3776   pg->remaining_hellos = total;
3777   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3778     {
3779       send_hello_context = GNUNET_malloc(sizeof(struct SendHelloContext));
3780       send_hello_context->peer = &pg->peers[pg_iter];
3781       send_hello_context->peer_pos = pg->peers[pg_iter].connect_peers_head;
3782       send_hello_context->pg = pg;
3783       GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3784     }
3785 #else
3786   for (pg_iter = 0; pg_iter < pg->max_outstanding_connections; pg_iter++)
3787     {
3788       preschedule_connect (pg);
3789     }
3790 #endif
3791   return total;
3792
3793 }
3794
3795 /**
3796  * Takes a peer group and creates a topology based on the
3797  * one specified.  Creates a topology means generates friend
3798  * files for the peers so they can only connect to those allowed
3799  * by the topology.  This will only have an effect once peers
3800  * are started if the FRIENDS_ONLY option is set in the base
3801  * config.  Also takes an optional restrict topology which
3802  * disallows connections based on particular transports
3803  * UNLESS they are specified in the restricted topology.
3804  *
3805  * @param pg the peer group struct representing the running peers
3806  * @param topology which topology to connect the peers in
3807  * @param restrict_topology disallow restrict_transports transport
3808  *                          connections to peers NOT in this topology
3809  *                          use GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
3810  * @param restrict_transports space delimited list of transports to blacklist
3811  *                            to create restricted topology
3812  *
3813  * @return the maximum number of connections were all allowed peers
3814  *         connected to each other
3815  */
3816 unsigned int
3817 GNUNET_TESTING_create_topology(struct GNUNET_TESTING_PeerGroup *pg,
3818                                enum GNUNET_TESTING_Topology topology,
3819                                enum GNUNET_TESTING_Topology restrict_topology,
3820                                const char *restrict_transports)
3821 {
3822   int ret;
3823
3824   unsigned int num_connections;
3825   int unblacklisted_connections;
3826   char *filename;
3827   struct PeerConnection *conn_iter;
3828   struct PeerConnection *temp_conn;
3829   unsigned int off;
3830
3831 #if !OLD
3832   unsigned int i;
3833   for (i = 0; i < pg->total; i++)
3834     {
3835       pg->peers[i].allowed_peers =
3836       GNUNET_CONTAINER_multihashmap_create (100);
3837       pg->peers[i].connect_peers =
3838       GNUNET_CONTAINER_multihashmap_create (100);
3839       pg->peers[i].blacklisted_peers =
3840       GNUNET_CONTAINER_multihashmap_create (100);
3841       pg->peers[i].pg = pg;
3842     }
3843 #endif
3844
3845   switch (topology)
3846     {
3847   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3848 #if VERBOSE_TESTING
3849     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating clique topology\n"));
3850 #endif
3851     num_connections = create_clique (pg, &add_connections, ALLOWED, GNUNET_NO);
3852     break;
3853   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
3854 #if VERBOSE_TESTING
3855     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3856         _("Creating small world (ring) topology\n"));
3857 #endif
3858     num_connections = create_small_world_ring (pg, &add_connections, ALLOWED);
3859     break;
3860   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
3861 #if VERBOSE_TESTING
3862     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3863         _("Creating small world (2d-torus) topology\n"));
3864 #endif
3865     num_connections = create_small_world (pg, &add_connections, ALLOWED);
3866     break;
3867   case GNUNET_TESTING_TOPOLOGY_RING:
3868 #if VERBOSE_TESTING
3869     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring topology\n"));
3870 #endif
3871     num_connections = create_ring (pg, &add_connections, ALLOWED);
3872     break;
3873   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
3874 #if VERBOSE_TESTING
3875     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating 2d torus topology\n"));
3876 #endif
3877     num_connections = create_2d_torus (pg, &add_connections, ALLOWED);
3878     break;
3879   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
3880 #if VERBOSE_TESTING
3881     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3882         _("Creating Erdos-Renyi topology\n"));
3883 #endif
3884     num_connections = create_erdos_renyi (pg, &add_connections, ALLOWED);
3885     break;
3886   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
3887 #if VERBOSE_TESTING
3888     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating InterNAT topology\n"));
3889 #endif
3890     num_connections = create_nated_internet (pg, &add_connections, ALLOWED);
3891     break;
3892   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
3893 #if VERBOSE_TESTING
3894     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3895         _("Creating Scale Free topology\n"));
3896 #endif
3897     num_connections = create_scale_free (pg, &add_connections, ALLOWED);
3898     break;
3899   case GNUNET_TESTING_TOPOLOGY_LINE:
3900 #if VERBOSE_TESTING
3901     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3902         _("Creating straight line topology\n"));
3903 #endif
3904     num_connections = create_line (pg, &add_connections, ALLOWED);
3905     break;
3906   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
3907 #if VERBOSE_TESTING
3908     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3909         _("Creating topology from file!\n"));
3910 #endif
3911     if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "testing",
3912                                                             "topology_file",
3913                                                             &filename))
3914       num_connections = create_from_file (pg, filename, &add_connections,
3915                                           ALLOWED);
3916     else
3917       {
3918         GNUNET_log (
3919                     GNUNET_ERROR_TYPE_WARNING,
3920                     "Missing configuration option TESTING:TOPOLOGY_FILE for creating topology from file!\n");
3921         num_connections = 0;
3922       }
3923     break;
3924   case GNUNET_TESTING_TOPOLOGY_NONE:
3925 #if VERBOSE_TESTING
3926     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3927         _
3928         ("Creating no allowed topology (all peers can connect at core level)\n"));
3929 #endif
3930     num_connections = pg->total * pg->total; /* Clique is allowed! */
3931     break;
3932   default:
3933     num_connections = 0;
3934     break;
3935     }
3936
3937   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "TESTING",
3938                                                           "F2F"))
3939     {
3940       ret = create_and_copy_friend_files (pg);
3941       if (ret != GNUNET_OK)
3942         {
3943 #if VERBOSE_TESTING
3944           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3945               _("Failed during friend file copying!\n"));
3946 #endif
3947           return GNUNET_SYSERR;
3948         }
3949       else
3950         {
3951 #if VERBOSE_TESTING
3952           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3953               _("Friend files created/copied successfully!\n"));
3954 #endif
3955         }
3956     }
3957
3958   /* Use the create clique method to initially set all connections as blacklisted. */
3959   if ((restrict_topology != GNUNET_TESTING_TOPOLOGY_NONE) && (restrict_topology
3960       != GNUNET_TESTING_TOPOLOGY_FROM_FILE))
3961     create_clique (pg, &add_connections, BLACKLIST, GNUNET_NO);
3962   else
3963     return num_connections;
3964
3965   unblacklisted_connections = 0;
3966   /* Un-blacklist connections as per the topology specified */
3967   switch (restrict_topology)
3968     {
3969   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3970 #if VERBOSE_TESTING
3971     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3972         _("Blacklisting all but clique topology\n"));
3973 #endif
3974     unblacklisted_connections = create_clique (pg, &remove_connections,
3975                                                BLACKLIST, GNUNET_NO);
3976     break;
3977   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
3978 #if VERBOSE_TESTING
3979     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3980         _("Blacklisting all but small world (ring) topology\n"));
3981 #endif
3982     unblacklisted_connections = create_small_world_ring (pg,
3983                                                          &remove_connections,
3984                                                          BLACKLIST);
3985     break;
3986   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
3987 #if VERBOSE_TESTING
3988     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3989         _
3990         ("Blacklisting all but small world (2d-torus) topology\n"));
3991 #endif
3992     unblacklisted_connections = create_small_world (pg, &remove_connections,
3993                                                     BLACKLIST);
3994     break;
3995   case GNUNET_TESTING_TOPOLOGY_RING:
3996 #if VERBOSE_TESTING
3997     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3998         _("Blacklisting all but ring topology\n"));
3999 #endif
4000     unblacklisted_connections
4001         = create_ring (pg, &remove_connections, BLACKLIST);
4002     break;
4003   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
4004 #if VERBOSE_TESTING
4005     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4006         _("Blacklisting all but 2d torus topology\n"));
4007 #endif
4008     unblacklisted_connections = create_2d_torus (pg, &remove_connections,
4009                                                  BLACKLIST);
4010     break;
4011   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
4012 #if VERBOSE_TESTING
4013     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4014         _("Blacklisting all but Erdos-Renyi topology\n"));
4015 #endif
4016     unblacklisted_connections = create_erdos_renyi (pg, &remove_connections,
4017                                                     BLACKLIST);
4018     break;
4019   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
4020 #if VERBOSE_TESTING
4021     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4022         _("Blacklisting all but InterNAT topology\n"));
4023 #endif
4024
4025 #if TOPOLOGY_HACK
4026     for (off = 0; off < pg->total; off++)
4027       {
4028         conn_iter = pg->peers[off].allowed_peers_head;
4029         while (conn_iter != NULL)
4030           {
4031             temp_conn = conn_iter->next;
4032             GNUNET_free(conn_iter);
4033             conn_iter = temp_conn;
4034           }
4035         pg->peers[off].allowed_peers_head = NULL;
4036         pg->peers[off].allowed_peers_tail = NULL;
4037
4038         conn_iter = pg->peers[off].connect_peers_head;
4039         while (conn_iter != NULL)
4040           {
4041             temp_conn = conn_iter->next;
4042             GNUNET_free(conn_iter);
4043             conn_iter = temp_conn;
4044           }
4045         pg->peers[off].connect_peers_head = NULL;
4046         pg->peers[off].connect_peers_tail = NULL;
4047       }
4048     unblacklisted_connections
4049         = create_nated_internet_copy (pg, &remove_connections, BLACKLIST);
4050 #else
4051     unblacklisted_connections =
4052     create_nated_internet (pg, &remove_connections, BLACKLIST);
4053 #endif
4054
4055     break;
4056   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
4057 #if VERBOSE_TESTING
4058     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4059         _("Blacklisting all but Scale Free topology\n"));
4060 #endif
4061     unblacklisted_connections = create_scale_free (pg, &remove_connections,
4062                                                    BLACKLIST);
4063     break;
4064   case GNUNET_TESTING_TOPOLOGY_LINE:
4065 #if VERBOSE_TESTING
4066     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4067         _("Blacklisting all but straight line topology\n"));
4068 #endif
4069     unblacklisted_connections
4070         = create_line (pg, &remove_connections, BLACKLIST);
4071     break;
4072   case GNUNET_TESTING_TOPOLOGY_NONE: /* Fall through */
4073   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
4074 #if VERBOSE_TESTING
4075     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4076         _
4077         ("Creating no blacklist topology (all peers can connect at transport level)\n"));
4078 #endif
4079     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
4080     ("Creating blacklist topology from allowed\n"));
4081     unblacklisted_connections = copy_allowed (pg, &remove_connections);
4082   default:
4083     break;
4084     }
4085
4086   if ((unblacklisted_connections > 0) && (restrict_transports != NULL))
4087     {
4088       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Creating blacklist with `%s'\n",
4089                   restrict_transports);
4090       ret = create_and_copy_blacklist_files (pg, restrict_transports);
4091       if (ret != GNUNET_OK)
4092         {
4093 #if VERBOSE_TESTING
4094           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4095               _("Failed during blacklist file copying!\n"));
4096 #endif
4097           return 0;
4098         }
4099       else
4100         {
4101 #if VERBOSE_TESTING
4102           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4103               _("Blacklist files created/copied successfully!\n"));
4104 #endif
4105         }
4106     }
4107   return num_connections;
4108 }
4109
4110 #if !OLD
4111 /**
4112  * Iterator for choosing random peers to connect.
4113  *
4114  * @param cls closure, a RandomContext
4115  * @param key the key the second Daemon was stored under
4116  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4117  *
4118  * @return GNUNET_YES to continue iteration
4119  */
4120 static int
4121 random_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4122   {
4123     struct RandomContext *random_ctx = cls;
4124     double random_number;
4125     uint32_t second_pos;
4126     GNUNET_HashCode first_hash;
4127     random_number =
4128     ((double)
4129         GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4130             UINT64_MAX)) / ((double) UINT64_MAX);
4131     if (random_number < random_ctx->percentage)
4132       {
4133         GNUNET_assert (GNUNET_OK ==
4134             GNUNET_CONTAINER_multihashmap_put (random_ctx->
4135                 first->connect_peers_working_set,
4136                 key, value,
4137                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4138       }
4139
4140     /* Now we have considered this particular connection, remove it from the second peer so it's not double counted */
4141     uid_from_hash (key, &second_pos);
4142     hash_from_uid (random_ctx->first_uid, &first_hash);
4143     GNUNET_assert (random_ctx->pg->total > second_pos);
4144     GNUNET_assert (GNUNET_YES ==
4145         GNUNET_CONTAINER_multihashmap_remove (random_ctx->
4146             pg->peers
4147             [second_pos].connect_peers,
4148             &first_hash,
4149             random_ctx->
4150             first->daemon));
4151
4152     return GNUNET_YES;
4153   }
4154
4155 /**
4156  * Iterator for adding at least X peers to a peers connection set.
4157  *
4158  * @param cls closure, MinimumContext
4159  * @param key the key the second Daemon was stored under
4160  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4161  *
4162  * @return GNUNET_YES to continue iteration
4163  */
4164 static int
4165 minimum_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4166   {
4167     struct MinimumContext *min_ctx = cls;
4168     uint32_t second_pos;
4169     GNUNET_HashCode first_hash;
4170     unsigned int i;
4171
4172     if (GNUNET_CONTAINER_multihashmap_size
4173         (min_ctx->first->connect_peers_working_set) < min_ctx->num_to_add)
4174       {
4175         for (i = 0; i < min_ctx->num_to_add; i++)
4176           {
4177             if (min_ctx->pg_array[i] == min_ctx->current)
4178               {
4179                 GNUNET_assert (GNUNET_OK ==
4180                     GNUNET_CONTAINER_multihashmap_put
4181                     (min_ctx->first->connect_peers_working_set, key,
4182                         value,
4183                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4184                 uid_from_hash (key, &second_pos);
4185                 hash_from_uid (min_ctx->first_uid, &first_hash);
4186                 GNUNET_assert (min_ctx->pg->total > second_pos);
4187                 GNUNET_assert (GNUNET_OK ==
4188                     GNUNET_CONTAINER_multihashmap_put (min_ctx->
4189                         pg->peers
4190                         [second_pos].connect_peers_working_set,
4191                         &first_hash,
4192                         min_ctx->first->
4193                         daemon,
4194                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4195                 /* Now we have added this particular connection, remove it from the second peer's map so it's not double counted */
4196                 GNUNET_assert (GNUNET_YES ==
4197                     GNUNET_CONTAINER_multihashmap_remove
4198                     (min_ctx->pg->peers[second_pos].connect_peers,
4199                         &first_hash, min_ctx->first->daemon));
4200               }
4201           }
4202         min_ctx->current++;
4203         return GNUNET_YES;
4204       }
4205     else
4206     return GNUNET_NO; /* We can stop iterating, we have enough peers! */
4207
4208   }
4209
4210 /**
4211  * Iterator for adding peers to a connection set based on a depth first search.
4212  *
4213  * @param cls closure, MinimumContext
4214  * @param key the key the second daemon was stored under
4215  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4216  *
4217  * @return GNUNET_YES to continue iteration
4218  */
4219 static int
4220 dfs_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4221   {
4222     struct DFSContext *dfs_ctx = cls;
4223     GNUNET_HashCode first_hash;
4224
4225     if (dfs_ctx->current == dfs_ctx->chosen)
4226       {
4227         GNUNET_assert (GNUNET_OK ==
4228             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4229                 first->connect_peers_working_set,
4230                 key, value,
4231                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4232         uid_from_hash (key, &dfs_ctx->second_uid);
4233         hash_from_uid (dfs_ctx->first_uid, &first_hash);
4234         GNUNET_assert (GNUNET_OK ==
4235             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4236                 pg->peers
4237                 [dfs_ctx->second_uid].connect_peers_working_set,
4238                 &first_hash,
4239                 dfs_ctx->
4240                 first->daemon,
4241                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4242         GNUNET_assert (GNUNET_YES ==
4243             GNUNET_CONTAINER_multihashmap_remove (dfs_ctx->
4244                 pg->peers
4245                 [dfs_ctx->second_uid].connect_peers,
4246                 &first_hash,
4247                 dfs_ctx->
4248                 first->daemon));
4249         /* Can't remove second from first yet because we are currently iterating, hence the return value in the DFSContext! */
4250         return GNUNET_NO; /* We have found our peer, don't iterate more */
4251       }
4252
4253     dfs_ctx->current++;
4254     return GNUNET_YES;
4255   }
4256 #endif
4257
4258 /**
4259  * From the set of connections possible, choose percentage percent of connections
4260  * to actually connect.
4261  *
4262  * @param pg the peergroup we are dealing with
4263  * @param percentage what percent of total connections to make
4264  */
4265 void
4266 choose_random_connections(struct GNUNET_TESTING_PeerGroup *pg,
4267                           double percentage)
4268 {
4269   struct RandomContext random_ctx;
4270   uint32_t pg_iter;
4271 #if OLD
4272   struct PeerConnection *temp_peers;
4273   struct PeerConnection *conn_iter;
4274   double random_number;
4275 #endif
4276
4277   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4278     {
4279       random_ctx.first_uid = pg_iter;
4280       random_ctx.first = &pg->peers[pg_iter];
4281       random_ctx.percentage = percentage;
4282       random_ctx.pg = pg;
4283 #if OLD
4284       temp_peers = NULL;
4285       conn_iter = pg->peers[pg_iter].connect_peers_head;
4286       while (conn_iter != NULL)
4287         {
4288           random_number
4289               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4290                                                     UINT64_MAX))
4291                   / ((double) UINT64_MAX);
4292           if (random_number < percentage)
4293             {
4294               add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4295                                GNUNET_YES);
4296             }
4297           conn_iter = conn_iter->next;
4298         }
4299 #else
4300       pg->peers[pg_iter].connect_peers_working_set =
4301       GNUNET_CONTAINER_multihashmap_create (pg->total);
4302       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4303           &random_connect_iterator,
4304           &random_ctx);
4305       /* Now remove the old connections */
4306       GNUNET_CONTAINER_multihashmap_destroy (pg->
4307           peers[pg_iter].connect_peers);
4308       /* And replace with the random set */
4309       pg->peers[pg_iter].connect_peers =
4310       pg->peers[pg_iter].connect_peers_working_set;
4311 #endif
4312     }
4313
4314   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4315     {
4316       conn_iter = pg->peers[pg_iter].connect_peers_head;
4317       while (pg->peers[pg_iter].connect_peers_head != NULL)
4318         remove_connections (pg, pg_iter,
4319                             pg->peers[pg_iter].connect_peers_head->index,
4320                             CONNECT, GNUNET_YES);
4321
4322       pg->peers[pg_iter].connect_peers_head
4323           = pg->peers[pg_iter].connect_peers_working_set_head;
4324       pg->peers[pg_iter].connect_peers_tail
4325           = pg->peers[pg_iter].connect_peers_working_set_tail;
4326       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4327       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4328     }
4329 }
4330
4331 /**
4332  * Count the number of connections in a linked list of connections.
4333  *
4334  * @param conn_list the connection list to get the count of
4335  *
4336  * @return the number of elements in the list
4337  */
4338 static unsigned int
4339 count_connections(struct PeerConnection *conn_list)
4340 {
4341   struct PeerConnection *iter;
4342   unsigned int count;
4343   count = 0;
4344   iter = conn_list;
4345   while (iter != NULL)
4346     {
4347       iter = iter->next;
4348       count++;
4349     }
4350   return count;
4351 }
4352
4353 static unsigned int
4354 count_workingset_connections(struct GNUNET_TESTING_PeerGroup *pg)
4355 {
4356   unsigned int count;
4357   unsigned int pg_iter;
4358 #if OLD
4359   struct PeerConnection *conn_iter;
4360 #endif
4361   count = 0;
4362
4363   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4364     {
4365 #if OLD
4366       conn_iter = pg->peers[pg_iter].connect_peers_working_set_head;
4367       while (conn_iter != NULL)
4368         {
4369           count++;
4370           conn_iter = conn_iter->next;
4371         }
4372 #else
4373       count +=
4374       GNUNET_CONTAINER_multihashmap_size (pg->
4375           peers
4376           [pg_iter].connect_peers_working_set);
4377 #endif
4378     }
4379
4380   return count;
4381 }
4382
4383 static unsigned int
4384 count_allowed_connections(struct GNUNET_TESTING_PeerGroup *pg)
4385 {
4386   unsigned int count;
4387   unsigned int pg_iter;
4388 #if OLD
4389   struct PeerConnection *conn_iter;
4390 #endif
4391
4392   count = 0;
4393   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4394     {
4395 #if OLD
4396       conn_iter = pg->peers[pg_iter].allowed_peers_head;
4397       while (conn_iter != NULL)
4398         {
4399           count++;
4400           conn_iter = conn_iter->next;
4401         }
4402 #else
4403       count +=
4404       GNUNET_CONTAINER_multihashmap_size (pg->
4405           peers
4406           [pg_iter].allowed_peers);
4407 #endif
4408     }
4409
4410   return count;
4411 }
4412
4413 /**
4414  * From the set of connections possible, choose at least num connections per
4415  * peer.
4416  *
4417  * @param pg the peergroup we are dealing with
4418  * @param num how many connections at least should each peer have (if possible)?
4419  */
4420 static void
4421 choose_minimum(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4422 {
4423 #if !OLD
4424   struct MinimumContext minimum_ctx;
4425 #else
4426   struct PeerConnection *conn_iter;
4427   unsigned int temp_list_size;
4428   unsigned int i;
4429   unsigned int count;
4430   uint32_t random; /* Random list entry to connect peer to */
4431 #endif
4432   uint32_t pg_iter;
4433
4434 #if OLD
4435   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4436     {
4437       temp_list_size
4438           = count_connections (pg->peers[pg_iter].connect_peers_head);
4439       if (temp_list_size == 0)
4440         {
4441           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4442                       "Peer %d has 0 connections!?!?\n", pg_iter);
4443           break;
4444         }
4445       for (i = 0; i < num; i++)
4446         {
4447           random = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4448                                              temp_list_size);
4449           conn_iter = pg->peers[pg_iter].connect_peers_head;
4450           for (count = 0; count < random; count++)
4451             conn_iter = conn_iter->next;
4452           /* We now have a random connection, connect it! */
4453           GNUNET_assert(conn_iter != NULL);
4454           add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4455                            GNUNET_YES);
4456         }
4457     }
4458 #else
4459   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4460     {
4461       pg->peers[pg_iter].connect_peers_working_set =
4462       GNUNET_CONTAINER_multihashmap_create (num);
4463     }
4464
4465   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4466     {
4467       minimum_ctx.first_uid = pg_iter;
4468       minimum_ctx.pg_array =
4469       GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
4470           GNUNET_CONTAINER_multihashmap_size
4471           (pg->peers[pg_iter].connect_peers));
4472       minimum_ctx.first = &pg->peers[pg_iter];
4473       minimum_ctx.pg = pg;
4474       minimum_ctx.num_to_add = num;
4475       minimum_ctx.current = 0;
4476       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4477           &minimum_connect_iterator,
4478           &minimum_ctx);
4479     }
4480
4481   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4482     {
4483       /* Remove the "old" connections */
4484       GNUNET_CONTAINER_multihashmap_destroy (pg->
4485           peers[pg_iter].connect_peers);
4486       /* And replace with the working set */
4487       pg->peers[pg_iter].connect_peers =
4488       pg->peers[pg_iter].connect_peers_working_set;
4489     }
4490 #endif
4491   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4492     {
4493       while (pg->peers[pg_iter].connect_peers_head != NULL)
4494         {
4495           conn_iter = pg->peers[pg_iter].connect_peers_head;
4496           GNUNET_CONTAINER_DLL_remove(pg->peers[pg_iter].connect_peers_head,
4497               pg->peers[pg_iter].connect_peers_tail,
4498               conn_iter);
4499           GNUNET_free(conn_iter);
4500           /*remove_connections(pg, pg_iter, pg->peers[pg_iter].connect_peers_head->index, CONNECT, GNUNET_YES);*/
4501         }
4502
4503       pg->peers[pg_iter].connect_peers_head
4504           = pg->peers[pg_iter].connect_peers_working_set_head;
4505       pg->peers[pg_iter].connect_peers_tail
4506           = pg->peers[pg_iter].connect_peers_working_set_tail;
4507       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4508       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4509     }
4510 }
4511
4512 #if !OLD
4513 struct FindClosestContext
4514   {
4515     /**
4516      * The currently known closest peer.
4517      */
4518     struct GNUNET_TESTING_Daemon *closest;
4519
4520     /**
4521      * The info for the peer we are adding connections for.
4522      */
4523     struct PeerData *curr_peer;
4524
4525     /**
4526      * The distance (bits) between the current
4527      * peer and the currently known closest.
4528      */
4529     unsigned int closest_dist;
4530
4531     /**
4532      * The offset of the closest known peer in
4533      * the peer group.
4534      */
4535     unsigned int closest_num;
4536   };
4537
4538 /**
4539  * Iterator over hash map entries of the allowed
4540  * peer connections.  Find the closest, not already
4541  * connected peer and return it.
4542  *
4543  * @param cls closure (struct FindClosestContext)
4544  * @param key current key code (hash of offset in pg)
4545  * @param value value in the hash map - a GNUNET_TESTING_Daemon
4546  * @return GNUNET_YES if we should continue to
4547  *         iterate,
4548  *         GNUNET_NO if not.
4549  */
4550 static int
4551 find_closest_peers (void *cls, const GNUNET_HashCode * key, void *value)
4552   {
4553     struct FindClosestContext *closest_ctx = cls;
4554     struct GNUNET_TESTING_Daemon *daemon = value;
4555
4556     if (((closest_ctx->closest == NULL) ||
4557             (GNUNET_CRYPTO_hash_matching_bits
4558                 (&daemon->id.hashPubKey,
4559                     &closest_ctx->curr_peer->daemon->id.hashPubKey) >
4560                 closest_ctx->closest_dist))
4561         && (GNUNET_YES !=
4562             GNUNET_CONTAINER_multihashmap_contains (closest_ctx->
4563                 curr_peer->connect_peers,
4564                 key)))
4565       {
4566         closest_ctx->closest_dist =
4567         GNUNET_CRYPTO_hash_matching_bits (&daemon->id.hashPubKey,
4568             &closest_ctx->curr_peer->daemon->
4569             id.hashPubKey);
4570         closest_ctx->closest = daemon;
4571         uid_from_hash (key, &closest_ctx->closest_num);
4572       }
4573     return GNUNET_YES;
4574   }
4575
4576 /**
4577  * From the set of connections possible, choose at num connections per
4578  * peer based on depth which are closest out of those allowed.  Guaranteed
4579  * to add num peers to connect to, provided there are that many peers
4580  * in the underlay topology to connect to.
4581  *
4582  * @param pg the peergroup we are dealing with
4583  * @param num how many connections at least should each peer have (if possible)?
4584  * @param proc processor to actually add the connections
4585  * @param list the peer list to use
4586  */
4587 void
4588 add_closest (struct GNUNET_TESTING_PeerGroup *pg, unsigned int num,
4589     GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
4590   {
4591 #if OLD
4592
4593 #else
4594     struct FindClosestContext closest_ctx;
4595 #endif
4596     uint32_t pg_iter;
4597     uint32_t i;
4598
4599     for (i = 0; i < num; i++) /* Each time find a closest peer (from those available) */
4600       {
4601         for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4602           {
4603             closest_ctx.curr_peer = &pg->peers[pg_iter];
4604             closest_ctx.closest = NULL;
4605             closest_ctx.closest_dist = 0;
4606             closest_ctx.closest_num = 0;
4607             GNUNET_CONTAINER_multihashmap_iterate (pg->
4608                 peers[pg_iter].allowed_peers,
4609                 &find_closest_peers,
4610                 &closest_ctx);
4611             if (closest_ctx.closest != NULL)
4612               {
4613                 GNUNET_assert (closest_ctx.closest_num < pg->total);
4614                 proc (pg, pg_iter, closest_ctx.closest_num, list);
4615               }
4616           }
4617       }
4618   }
4619 #endif
4620
4621 /**
4622  * From the set of connections possible, choose at least num connections per
4623  * peer based on depth first traversal of peer connections.  If DFS leaves
4624  * peers unconnected, ensure those peers get connections.
4625  *
4626  * @param pg the peergroup we are dealing with
4627  * @param num how many connections at least should each peer have (if possible)?
4628  */
4629 void
4630 perform_dfs(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4631 {
4632   uint32_t pg_iter;
4633   uint32_t dfs_count;
4634   uint32_t starting_peer;
4635   uint32_t least_connections;
4636   uint32_t random_connection;
4637 #if OLD
4638   unsigned int temp_count;
4639   struct PeerConnection *peer_iter;
4640 #else
4641   struct DFSContext dfs_ctx;
4642   GNUNET_HashCode second_hash;
4643 #endif
4644
4645 #if OLD
4646   starting_peer = 0;
4647   dfs_count = 0;
4648   while ((count_workingset_connections (pg) < num * pg->total)
4649       && (count_allowed_connections (pg) > 0))
4650     {
4651       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4652         {
4653           least_connections = -1; /* Set to very high number */
4654           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4655             {
4656               temp_count
4657                   = count_connections (
4658                                        pg->peers[pg_iter].connect_peers_working_set_head);
4659               if (temp_count < least_connections)
4660                 {
4661                   starting_peer = pg_iter;
4662                   least_connections = temp_count;
4663                 }
4664             }
4665         }
4666
4667       temp_count
4668           = count_connections (pg->peers[starting_peer].connect_peers_head);
4669       if (temp_count == 0)
4670         continue; /* FIXME: infinite loop? */
4671
4672       random_connection = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4673                                                     temp_count);
4674       temp_count = 0;
4675       peer_iter = pg->peers[starting_peer].connect_peers_head;
4676       while (temp_count < random_connection)
4677         {
4678           peer_iter = peer_iter->next;
4679           temp_count++;
4680         }
4681       GNUNET_assert(peer_iter != NULL);
4682       add_connections (pg, starting_peer, peer_iter->index, WORKING_SET,
4683                        GNUNET_NO);
4684       remove_connections (pg, starting_peer, peer_iter->index, CONNECT,
4685                           GNUNET_YES);
4686       starting_peer = peer_iter->index;
4687       dfs_count++;
4688     }
4689
4690 #else
4691   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4692     {
4693       pg->peers[pg_iter].connect_peers_working_set =
4694       GNUNET_CONTAINER_multihashmap_create (num);
4695     }
4696
4697   starting_peer = 0;
4698   dfs_count = 0;
4699   while ((count_workingset_connections (pg) < num * pg->total)
4700       && (count_allowed_connections (pg) > 0))
4701     {
4702       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4703         {
4704           least_connections = -1; /* Set to very high number */
4705           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4706             {
4707               if (GNUNET_CONTAINER_multihashmap_size
4708                   (pg->peers[pg_iter].connect_peers_working_set) <
4709                   least_connections)
4710                 {
4711                   starting_peer = pg_iter;
4712                   least_connections =
4713                   GNUNET_CONTAINER_multihashmap_size (pg->
4714                       peers
4715                       [pg_iter].connect_peers_working_set);
4716                 }
4717             }
4718         }
4719
4720       if (GNUNET_CONTAINER_multihashmap_size (pg->peers[starting_peer].connect_peers) == 0) /* Ensure there is at least one peer left to connect! */
4721         {
4722           dfs_count = 0;
4723           continue;
4724         }
4725
4726       /* Choose a random peer from the chosen peers set of connections to add */
4727       dfs_ctx.chosen =
4728       GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4729           GNUNET_CONTAINER_multihashmap_size
4730           (pg->peers[starting_peer].connect_peers));
4731       dfs_ctx.first_uid = starting_peer;
4732       dfs_ctx.first = &pg->peers[starting_peer];
4733       dfs_ctx.pg = pg;
4734       dfs_ctx.current = 0;
4735
4736       GNUNET_CONTAINER_multihashmap_iterate (pg->
4737           peers
4738           [starting_peer].connect_peers,
4739           &dfs_connect_iterator, &dfs_ctx);
4740       /* Remove the second from the first, since we will be continuing the search and may encounter the first peer again! */
4741       hash_from_uid (dfs_ctx.second_uid, &second_hash);
4742       GNUNET_assert (GNUNET_YES ==
4743           GNUNET_CONTAINER_multihashmap_remove (pg->peers
4744               [starting_peer].connect_peers,
4745               &second_hash,
4746               pg->
4747               peers
4748               [dfs_ctx.second_uid].daemon));
4749       starting_peer = dfs_ctx.second_uid;
4750     }
4751
4752   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4753     {
4754       /* Remove the "old" connections */
4755       GNUNET_CONTAINER_multihashmap_destroy (pg->
4756           peers[pg_iter].connect_peers);
4757       /* And replace with the working set */
4758       pg->peers[pg_iter].connect_peers =
4759       pg->peers[pg_iter].connect_peers_working_set;
4760     }
4761 #endif
4762 }
4763
4764 /**
4765  * Internal callback for topology information for a particular peer.
4766  */
4767 static void
4768 internal_topology_callback(void *cls, const struct GNUNET_PeerIdentity *peer,
4769                            const struct GNUNET_TRANSPORT_ATS_Information *atsi)
4770 {
4771   struct CoreContext *core_ctx = cls;
4772   struct TopologyIterateContext *iter_ctx = core_ctx->iter_context;
4773
4774   if (peer == NULL) /* Either finished, or something went wrong */
4775     {
4776       iter_ctx->completed++;
4777       iter_ctx->connected--;
4778       /* One core context allocated per iteration, must free! */
4779       GNUNET_free (core_ctx);
4780     }
4781   else
4782     {
4783       iter_ctx->topology_cb (iter_ctx->cls, &core_ctx->daemon->id, peer, NULL);
4784     }
4785
4786   if (iter_ctx->completed == iter_ctx->total)
4787     {
4788       iter_ctx->topology_cb (iter_ctx->cls, NULL, NULL, NULL);
4789       /* Once all are done, free the iteration context */
4790       GNUNET_free (iter_ctx);
4791     }
4792 }
4793
4794 /**
4795  * Check running topology iteration tasks, if below max start a new one, otherwise
4796  * schedule for some time in the future.
4797  */
4798 static void
4799 schedule_get_topology(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4800 {
4801   struct CoreContext *core_context = cls;
4802   struct TopologyIterateContext *topology_context =
4803       (struct TopologyIterateContext *) core_context->iter_context;
4804   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4805     return;
4806
4807   if (topology_context->connected
4808       > topology_context->pg->max_outstanding_connections)
4809     {
4810 #if VERBOSE_TESTING > 2
4811       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4812           _
4813           ("Delaying connect, we have too many outstanding connections!\n"));
4814 #endif
4815       GNUNET_SCHEDULER_add_delayed (
4816                                     GNUNET_TIME_relative_multiply (
4817                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4818                                                                    100),
4819                                     &schedule_get_topology, core_context);
4820     }
4821   else
4822     {
4823 #if VERBOSE_TESTING > 2
4824       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4825           _("Creating connection, outstanding_connections is %d\n"),
4826           outstanding_connects);
4827 #endif
4828       topology_context->connected++;
4829
4830       if (GNUNET_OK != GNUNET_CORE_iterate_peers (core_context->daemon->cfg,
4831                                                   &internal_topology_callback,
4832                                                   core_context))
4833         {
4834           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Topology iteration failed.\n");
4835           internal_topology_callback (core_context, NULL, NULL);
4836         }
4837     }
4838 }
4839
4840 /**
4841  * Iterate over all (running) peers in the peer group, retrieve
4842  * all connections that each currently has.
4843  */
4844 void
4845 GNUNET_TESTING_get_topology(struct GNUNET_TESTING_PeerGroup *pg,
4846                             GNUNET_TESTING_NotifyTopology cb, void *cls)
4847 {
4848   struct TopologyIterateContext *topology_context;
4849   struct CoreContext *core_ctx;
4850   unsigned int i;
4851   unsigned int total_count;
4852
4853   /* Allocate a single topology iteration context */
4854   topology_context = GNUNET_malloc (sizeof (struct TopologyIterateContext));
4855   topology_context->topology_cb = cb;
4856   topology_context->cls = cls;
4857   topology_context->pg = pg;
4858   total_count = 0;
4859   for (i = 0; i < pg->total; i++)
4860     {
4861       if (pg->peers[i].daemon->running == GNUNET_YES)
4862         {
4863           /* Allocate one core context per core we need to connect to */
4864           core_ctx = GNUNET_malloc (sizeof (struct CoreContext));
4865           core_ctx->daemon = pg->peers[i].daemon;
4866           /* Set back pointer to topology iteration context */
4867           core_ctx->iter_context = topology_context;
4868           GNUNET_SCHEDULER_add_now (&schedule_get_topology, core_ctx);
4869           total_count++;
4870         }
4871     }
4872   if (total_count == 0)
4873     {
4874       cb (cls, NULL, NULL, "Cannot iterate over topology, no running peers!");
4875       GNUNET_free (topology_context);
4876     }
4877   else
4878     topology_context->total = total_count;
4879   return;
4880 }
4881
4882 /**
4883  * Callback function to process statistic values.
4884  * This handler is here only really to insert a peer
4885  * identity (or daemon) so the statistics can be uniquely
4886  * tied to a single running peer.
4887  *
4888  * @param cls closure
4889  * @param subsystem name of subsystem that created the statistic
4890  * @param name the name of the datum
4891  * @param value the current value
4892  * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
4893  * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
4894  */
4895 static int
4896 internal_stats_callback(void *cls, const char *subsystem, const char *name,
4897                         uint64_t value, int is_persistent)
4898 {
4899   struct StatsCoreContext *core_context = cls;
4900   struct StatsIterateContext *stats_context =
4901       (struct StatsIterateContext *) core_context->iter_context;
4902
4903   return stats_context->proc (stats_context->cls, &core_context->daemon->id,
4904                               subsystem, name, value, is_persistent);
4905 }
4906
4907 /**
4908  * Internal continuation call for statistics iteration.
4909  *
4910  * @param cls closure, the CoreContext for this iteration
4911  * @param success whether or not the statistics iterations
4912  *        was canceled or not (we don't care)
4913  */
4914 static void
4915 internal_stats_cont(void *cls, int success)
4916 {
4917   struct StatsCoreContext *core_context = cls;
4918   struct StatsIterateContext *stats_context =
4919       (struct StatsIterateContext *) core_context->iter_context;
4920
4921   stats_context->connected--;
4922   stats_context->completed++;
4923
4924   if (stats_context->completed == stats_context->total)
4925     {
4926       stats_context->cont (stats_context->cls, GNUNET_YES);
4927       GNUNET_free (stats_context);
4928     }
4929
4930   if (core_context->stats_handle != NULL)
4931     GNUNET_STATISTICS_destroy (core_context->stats_handle, GNUNET_NO);
4932
4933   GNUNET_free (core_context);
4934 }
4935
4936 /**
4937  * Check running topology iteration tasks, if below max start a new one, otherwise
4938  * schedule for some time in the future.
4939  */
4940 static void
4941 schedule_get_statistics(void *cls,
4942                         const struct GNUNET_SCHEDULER_TaskContext *tc)
4943 {
4944   struct StatsCoreContext *core_context = cls;
4945   struct StatsIterateContext *stats_context =
4946       (struct StatsIterateContext *) core_context->iter_context;
4947
4948   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4949     return;
4950
4951   if (stats_context->connected > stats_context->pg->max_outstanding_connections)
4952     {
4953 #if VERBOSE_TESTING > 2
4954       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4955           _
4956           ("Delaying connect, we have too many outstanding connections!\n"));
4957 #endif
4958       GNUNET_SCHEDULER_add_delayed (
4959                                     GNUNET_TIME_relative_multiply (
4960                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4961                                                                    100),
4962                                     &schedule_get_statistics, core_context);
4963     }
4964   else
4965     {
4966 #if VERBOSE_TESTING > 2
4967       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4968           _("Creating connection, outstanding_connections is %d\n"),
4969           outstanding_connects);
4970 #endif
4971
4972       stats_context->connected++;
4973       core_context->stats_handle
4974           = GNUNET_STATISTICS_create ("testing", core_context->daemon->cfg);
4975       if (core_context->stats_handle == NULL)
4976         {
4977           internal_stats_cont (core_context, GNUNET_NO);
4978           return;
4979         }
4980
4981       core_context->stats_get_handle
4982           = GNUNET_STATISTICS_get (core_context->stats_handle, NULL, NULL,
4983                                    GNUNET_TIME_relative_get_forever (),
4984                                    &internal_stats_cont,
4985                                    &internal_stats_callback, core_context);
4986       if (core_context->stats_get_handle == NULL)
4987         internal_stats_cont (core_context, GNUNET_NO);
4988
4989     }
4990 }
4991
4992 struct DuplicateStats
4993 {
4994   /**
4995    * Next item in the list
4996    */
4997   struct DuplicateStats *next;
4998
4999   /**
5000    * Nasty string, concatenation of relevant information.
5001    */
5002   char *unique_string;
5003 };
5004
5005 /**
5006  * Check whether the combination of port/host/unix domain socket
5007  * already exists in the list of peers being checked for statistics.
5008  *
5009  * @param pg the peergroup in question
5010  * @param specific_peer the peer we're concerned with
5011  * @param stats_list the list to return to the caller
5012  *
5013  * @return GNUNET_YES if the statistics instance has been seen already,
5014  *         GNUNET_NO if not (and we may have added it to the list)
5015  */
5016 static int
5017 stats_check_existing(struct GNUNET_TESTING_PeerGroup *pg,
5018                      struct PeerData *specific_peer,
5019                      struct DuplicateStats **stats_list)
5020 {
5021   struct DuplicateStats *pos;
5022   char *unix_domain_socket;
5023   unsigned long long port;
5024   char *to_match;
5025   if (GNUNET_YES
5026       != GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "testing",
5027                                                "single_statistics_per_host"))
5028     return GNUNET_NO; /* Each peer has its own statistics instance, do nothing! */
5029
5030   pos = *stats_list;
5031   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (specific_peer->cfg,
5032                                                           "statistics",
5033                                                           "unixpath",
5034                                                           &unix_domain_socket))
5035     return GNUNET_NO;
5036
5037   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (specific_peer->cfg,
5038                                                           "statistics", "port",
5039                                                           &port))
5040     {
5041       GNUNET_free(unix_domain_socket);
5042       return GNUNET_NO;
5043     }
5044
5045   if (specific_peer->daemon->hostname != NULL)
5046     GNUNET_asprintf (&to_match, "%s%s%llu", specific_peer->daemon->hostname,
5047                      unix_domain_socket, port);
5048   else
5049     GNUNET_asprintf (&to_match, "%s%llu", unix_domain_socket, port);
5050
5051   while (pos != NULL)
5052     {
5053       if (0 == strcmp (to_match, pos->unique_string))
5054         {
5055           GNUNET_free (unix_domain_socket);
5056           GNUNET_free (to_match);
5057           return GNUNET_YES;
5058         }
5059       pos = pos->next;
5060     }
5061   pos = GNUNET_malloc (sizeof (struct DuplicateStats));
5062   pos->unique_string = to_match;
5063   pos->next = *stats_list;
5064   *stats_list = pos;
5065   GNUNET_free (unix_domain_socket);
5066   return GNUNET_NO;
5067 }
5068
5069 /**
5070  * Iterate over all (running) peers in the peer group, retrieve
5071  * all statistics from each.
5072  */
5073 void
5074 GNUNET_TESTING_get_statistics(struct GNUNET_TESTING_PeerGroup *pg,
5075                               GNUNET_STATISTICS_Callback cont,
5076                               GNUNET_TESTING_STATISTICS_Iterator proc,
5077                               void *cls)
5078 {
5079   struct StatsIterateContext *stats_context;
5080   struct StatsCoreContext *core_ctx;
5081   unsigned int i;
5082   unsigned int total_count;
5083   struct DuplicateStats *stats_list;
5084   struct DuplicateStats *pos;
5085   stats_list = NULL;
5086
5087   /* Allocate a single stats iteration context */
5088   stats_context = GNUNET_malloc (sizeof (struct StatsIterateContext));
5089   stats_context->cont = cont;
5090   stats_context->proc = proc;
5091   stats_context->cls = cls;
5092   stats_context->pg = pg;
5093   total_count = 0;
5094
5095   for (i = 0; i < pg->total; i++)
5096     {
5097       if ((pg->peers[i].daemon->running == GNUNET_YES) && (GNUNET_NO
5098           == stats_check_existing (pg, &pg->peers[i], &stats_list)))
5099         {
5100           /* Allocate one core context per core we need to connect to */
5101           core_ctx = GNUNET_malloc (sizeof (struct StatsCoreContext));
5102           core_ctx->daemon = pg->peers[i].daemon;
5103           /* Set back pointer to topology iteration context */
5104           core_ctx->iter_context = stats_context;
5105           GNUNET_SCHEDULER_add_now (&schedule_get_statistics, core_ctx);
5106           total_count++;
5107         }
5108     }
5109
5110   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5111               "Retrieving stats from %u total instances.\n", total_count);
5112   stats_context->total = total_count;
5113   if (stats_list != NULL)
5114     {
5115       pos = stats_list;
5116       while (pos != NULL)
5117         {
5118           GNUNET_free (pos->unique_string);
5119           stats_list = pos->next;
5120           GNUNET_free (pos);
5121           pos = stats_list->next;
5122         }
5123     }
5124   return;
5125 }
5126
5127 /**
5128  * Stop the connection process temporarily.
5129  *
5130  * @param pg the peer group to stop connecting
5131  */
5132 void
5133 GNUNET_TESTING_stop_connections(struct GNUNET_TESTING_PeerGroup *pg)
5134 {
5135   pg->stop_connects = GNUNET_YES;
5136 }
5137
5138 /**
5139  * Resume the connection process temporarily.
5140  *
5141  * @param pg the peer group to resume connecting
5142  */
5143 void
5144 GNUNET_TESTING_resume_connections(struct GNUNET_TESTING_PeerGroup *pg)
5145 {
5146   pg->stop_connects = GNUNET_NO;
5147 }
5148
5149 /**
5150  * There are many ways to connect peers that are supported by this function.
5151  * To connect peers in the same topology that was created via the
5152  * GNUNET_TESTING_create_topology, the topology variable must be set to
5153  * GNUNET_TESTING_TOPOLOGY_NONE.  If the topology variable is specified,
5154  * a new instance of that topology will be generated and attempted to be
5155  * connected.  This could result in some connections being impossible,
5156  * because some topologies are non-deterministic.
5157  *
5158  * @param pg the peer group struct representing the running peers
5159  * @param topology which topology to connect the peers in
5160  * @param options options for connecting the topology
5161  * @param option_modifier modifier for options that take a parameter
5162  * @param connect_timeout how long to wait before giving up on connecting
5163  *                        two peers
5164  * @param connect_attempts how many times to attempt to connect two peers
5165  *                         over the connect_timeout duration
5166  * @param notify_callback notification to be called once all connections completed
5167  * @param notify_cls closure for notification callback
5168  *
5169  * @return the number of connections that will be attempted, GNUNET_SYSERR on error
5170  */
5171 int
5172 GNUNET_TESTING_connect_topology(
5173                                 struct GNUNET_TESTING_PeerGroup *pg,
5174                                 enum GNUNET_TESTING_Topology topology,
5175                                 enum GNUNET_TESTING_TopologyOption options,
5176                                 double option_modifier,
5177                                 struct GNUNET_TIME_Relative connect_timeout,
5178                                 unsigned int connect_attempts,
5179                                 GNUNET_TESTING_NotifyCompletion notify_callback,
5180                                 void *notify_cls)
5181 {
5182   switch (topology)
5183     {
5184   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
5185 #if VERBOSE_TOPOLOGY
5186     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5187                 _("Creating clique CONNECT topology\n"));
5188 #endif
5189     create_clique (pg, &add_connections, CONNECT, GNUNET_NO);
5190     break;
5191   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
5192 #if VERBOSE_TOPOLOGY
5193     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5194                 _("Creating small world (ring) CONNECT topology\n"));
5195 #endif
5196     create_small_world_ring (pg, &add_connections, CONNECT);
5197     break;
5198   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
5199 #if VERBOSE_TOPOLOGY
5200     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5201                 _("Creating small world (2d-torus) CONNECT topology\n"));
5202 #endif
5203     create_small_world (pg, &add_connections, CONNECT);
5204     break;
5205   case GNUNET_TESTING_TOPOLOGY_RING:
5206 #if VERBOSE_TOPOLOGY
5207     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring CONNECT topology\n"));
5208 #endif
5209     create_ring (pg, &add_connections, CONNECT);
5210     break;
5211   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
5212 #if VERBOSE_TOPOLOGY
5213     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5214                 _("Creating 2d torus CONNECT topology\n"));
5215 #endif
5216     create_2d_torus (pg, &add_connections, CONNECT);
5217     break;
5218   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
5219 #if VERBOSE_TOPOLOGY
5220     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5221                 _("Creating Erdos-Renyi CONNECT topology\n"));
5222 #endif
5223     create_erdos_renyi (pg, &add_connections, CONNECT);
5224     break;
5225   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
5226 #if VERBOSE_TOPOLOGY
5227     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5228                 _("Creating InterNAT CONNECT topology\n"));
5229 #endif
5230     create_nated_internet (pg, &add_connections, CONNECT);
5231     break;
5232   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
5233 #if VERBOSE_TOPOLOGY
5234     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5235                 _("Creating Scale Free CONNECT topology\n"));
5236 #endif
5237     create_scale_free (pg, &add_connections, CONNECT);
5238     break;
5239   case GNUNET_TESTING_TOPOLOGY_LINE:
5240 #if VERBOSE_TOPOLOGY
5241     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5242                 _("Creating straight line CONNECT topology\n"));
5243 #endif
5244     create_line (pg, &add_connections, CONNECT);
5245     break;
5246   case GNUNET_TESTING_TOPOLOGY_NONE:
5247 #if VERBOSE_TOPOLOGY
5248     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating no CONNECT topology\n"));
5249 #endif
5250     copy_allowed_topology (pg);
5251     break;
5252   default:
5253     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5254     ("Unknown topology specification, can't connect peers!\n"));
5255     return GNUNET_SYSERR;
5256     }
5257
5258   switch (options)
5259     {
5260   case GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM:
5261 #if VERBOSE_TOPOLOGY
5262     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5263     ("Connecting random subset (%'.2f percent) of possible peers\n"), 100
5264         * option_modifier);
5265 #endif
5266     choose_random_connections (pg, option_modifier);
5267     break;
5268   case GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM:
5269 #if VERBOSE_TOPOLOGY
5270     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5271                 _("Connecting a minimum of %u peers each (if possible)\n"),
5272                 (unsigned int) option_modifier);
5273 #endif
5274     choose_minimum (pg, (unsigned int) option_modifier);
5275     break;
5276   case GNUNET_TESTING_TOPOLOGY_OPTION_DFS:
5277 #if VERBOSE_TOPOLOGY
5278     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5279     ("Using DFS to connect a minimum of %u peers each (if possible)\n"),
5280                 (unsigned int) option_modifier);
5281 #endif
5282 #if FIXME
5283     perform_dfs (pg, (int) option_modifier);
5284 #endif
5285     break;
5286   case GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST:
5287 #if VERBOSE_TOPOLOGY
5288     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5289     ("Finding additional %u closest peers each (if possible)\n"),
5290                 (unsigned int) option_modifier);
5291 #endif
5292 #if FIXME
5293     add_closest (pg, (unsigned int) option_modifier,
5294         &add_connections, CONNECT);
5295 #endif
5296     break;
5297   case GNUNET_TESTING_TOPOLOGY_OPTION_NONE:
5298     break;
5299   case GNUNET_TESTING_TOPOLOGY_OPTION_ALL:
5300     break;
5301   default:
5302     break;
5303     }
5304
5305   return connect_topology (pg, connect_timeout, connect_attempts,
5306                            notify_callback, notify_cls);
5307 }
5308
5309 /**
5310  * Lookup and return the number of SSH connections to a host.
5311  *
5312  * @param hostname the hostname to lookup in the list
5313  * @param pg the peergroup that the host belongs to
5314  *
5315  * @return the number of current ssh connections to the host
5316  */
5317 static unsigned int
5318 count_outstanding_at_host(const char *hostname,
5319                           struct GNUNET_TESTING_PeerGroup *pg)
5320 {
5321   struct OutstandingSSH *pos;
5322   pos = pg->ssh_head;
5323   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5324     pos = pos->next;
5325   GNUNET_assert(pos != NULL);
5326   return pos->outstanding;
5327 }
5328
5329 /**
5330  * Increment the number of SSH connections to a host by one.
5331  *
5332  * @param hostname the hostname to lookup in the list
5333  * @param pg the peergroup that the host belongs to
5334  *
5335  */
5336 static void
5337 increment_outstanding_at_host(const char *hostname,
5338                               struct GNUNET_TESTING_PeerGroup *pg)
5339 {
5340   struct OutstandingSSH *pos;
5341   pos = pg->ssh_head;
5342   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5343     pos = pos->next;
5344   GNUNET_assert(pos != NULL);
5345   pos->outstanding++;
5346 }
5347
5348 /**
5349  * Decrement the number of SSH connections to a host by one.
5350  *
5351  * @param hostname the hostname to lookup in the list
5352  * @param pg the peergroup that the host belongs to
5353  *
5354  */
5355 static void
5356 decrement_outstanding_at_host(const char *hostname,
5357                               struct GNUNET_TESTING_PeerGroup *pg)
5358 {
5359   struct OutstandingSSH *pos;
5360   pos = pg->ssh_head;
5361   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5362     pos = pos->next;
5363   GNUNET_assert(pos != NULL);
5364   pos->outstanding--;
5365 }
5366
5367 /**
5368  * Callback that is called whenever a hostkey is generated
5369  * for a peer.  Call the real callback and decrement the
5370  * starting counter for the peergroup.
5371  *
5372  * @param cls closure
5373  * @param id identifier for the daemon, NULL on error
5374  * @param d handle for the daemon
5375  * @param emsg error message (NULL on success)
5376  */
5377 static void
5378 internal_hostkey_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5379                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5380 {
5381   struct InternalStartContext *internal_context = cls;
5382   internal_context->peer->pg->starting--;
5383   internal_context->peer->pg->started++;
5384   if (internal_context->hostname != NULL)
5385     decrement_outstanding_at_host (internal_context->hostname,
5386                                    internal_context->peer->pg);
5387   if (internal_context->hostkey_callback != NULL)
5388     internal_context->hostkey_callback (internal_context->hostkey_cls, id, d,
5389                                         emsg);
5390   else if (internal_context->peer->pg->started
5391       == internal_context->peer->pg->total)
5392     {
5393       internal_context->peer->pg->started = 0; /* Internal startup may use this counter! */
5394       GNUNET_TESTING_daemons_continue_startup (internal_context->peer->pg);
5395     }
5396 }
5397
5398 /**
5399  * Callback that is called whenever a peer has finished starting.
5400  * Call the real callback and decrement the starting counter
5401  * for the peergroup.
5402  *
5403  * @param cls closure
5404  * @param id identifier for the daemon, NULL on error
5405  * @param cfg config
5406  * @param d handle for the daemon
5407  * @param emsg error message (NULL on success)
5408  */
5409 static void
5410 internal_startup_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5411                           const struct GNUNET_CONFIGURATION_Handle *cfg,
5412                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5413 {
5414   struct InternalStartContext *internal_context = cls;
5415   internal_context->peer->pg->starting--;
5416   if (internal_context->hostname != NULL)
5417     decrement_outstanding_at_host (internal_context->hostname,
5418                                    internal_context->peer->pg);
5419   if (internal_context->start_cb != NULL)
5420     internal_context->start_cb (internal_context->start_cb_cls, id, cfg, d,
5421                                 emsg);
5422 }
5423
5424 static void
5425 internal_continue_startup(void *cls,
5426                           const struct GNUNET_SCHEDULER_TaskContext *tc)
5427 {
5428   struct InternalStartContext *internal_context = cls;
5429
5430   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5431     {
5432       return;
5433     }
5434
5435   if ((internal_context->peer->pg->starting
5436       < internal_context->peer->pg->max_concurrent_ssh)
5437       || ((internal_context->hostname != NULL)
5438           && (count_outstanding_at_host (internal_context->hostname,
5439                                          internal_context->peer->pg)
5440               < internal_context->peer->pg->max_concurrent_ssh)))
5441     {
5442       if (internal_context->hostname != NULL)
5443         increment_outstanding_at_host (internal_context->hostname,
5444                                        internal_context->peer->pg);
5445       internal_context->peer->pg->starting++;
5446       GNUNET_TESTING_daemon_continue_startup (internal_context->peer->daemon);
5447     }
5448   else
5449     {
5450       GNUNET_SCHEDULER_add_delayed (
5451                                     GNUNET_TIME_relative_multiply (
5452                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5453                                                                    100),
5454                                     &internal_continue_startup,
5455                                     internal_context);
5456     }
5457 }
5458
5459 /**
5460  * Callback for informing us about a successful
5461  * or unsuccessful churn start call.
5462  *
5463  * @param cls a ChurnContext
5464  * @param id the peer identity of the started peer
5465  * @param cfg the handle to the configuration of the peer
5466  * @param d handle to the daemon for the peer
5467  * @param emsg NULL on success, non-NULL on failure
5468  *
5469  */
5470 void
5471 churn_start_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5472                      const struct GNUNET_CONFIGURATION_Handle *cfg,
5473                      struct GNUNET_TESTING_Daemon *d, const char *emsg)
5474 {
5475   struct ChurnRestartContext *startup_ctx = cls;
5476   struct ChurnContext *churn_ctx = startup_ctx->churn_ctx;
5477
5478   unsigned int total_left;
5479   char *error_message;
5480
5481   error_message = NULL;
5482   if (emsg != NULL)
5483     {
5484       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5485                   "Churn stop callback failed with error `%s'\n", emsg);
5486       churn_ctx->num_failed_start++;
5487     }
5488   else
5489     {
5490       churn_ctx->num_to_start--;
5491     }
5492
5493 #if DEBUG_CHURN
5494   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5495       "Started peer, %d left.\n", churn_ctx->num_to_start);
5496 #endif
5497
5498   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
5499       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
5500
5501   if (total_left == 0)
5502     {
5503       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
5504         GNUNET_asprintf (
5505                          &error_message,
5506                          "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
5507                          churn_ctx->num_failed_start,
5508                          churn_ctx->num_failed_stop);
5509       churn_ctx->cb (churn_ctx->cb_cls, error_message);
5510       GNUNET_free_non_null (error_message);
5511       GNUNET_free (churn_ctx);
5512       GNUNET_free (startup_ctx);
5513     }
5514 }
5515
5516 static void
5517 schedule_churn_restart(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5518 {
5519   struct PeerRestartContext *peer_restart_ctx = cls;
5520   struct ChurnRestartContext *startup_ctx = peer_restart_ctx->churn_restart_ctx;
5521
5522   if (startup_ctx->outstanding > startup_ctx->pg->max_concurrent_ssh)
5523     GNUNET_SCHEDULER_add_delayed (
5524                                   GNUNET_TIME_relative_multiply (
5525                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
5526                                                                  100),
5527                                   &schedule_churn_restart, peer_restart_ctx);
5528   else
5529     {
5530       GNUNET_TESTING_daemon_start_stopped (peer_restart_ctx->daemon,
5531                                            startup_ctx->timeout,
5532                                            &churn_start_callback, startup_ctx);
5533       GNUNET_free (peer_restart_ctx);
5534     }
5535 }
5536
5537
5538 static void
5539 internal_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5540 {
5541   struct InternalStartContext *internal_context = cls;
5542
5543   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5544     {
5545       return;
5546     }
5547
5548   if ((internal_context->peer->pg->starting
5549       < internal_context->peer->pg->max_concurrent_ssh)
5550       || ((internal_context->hostname != NULL)
5551           && (count_outstanding_at_host (internal_context->hostname,
5552                                          internal_context->peer->pg)
5553               < internal_context->peer->pg->max_concurrent_ssh)))
5554     {
5555       if (internal_context->hostname != NULL)
5556         increment_outstanding_at_host (internal_context->hostname,
5557                                        internal_context->peer->pg);
5558       internal_context->peer->pg->starting++;
5559       internal_context->peer->daemon
5560           = GNUNET_TESTING_daemon_start (internal_context->peer->cfg,
5561                                          internal_context->timeout,
5562                                          GNUNET_NO,
5563                                          internal_context->hostname,
5564                                          internal_context->username,
5565                                          internal_context->sshport,
5566                                          internal_context->hostkey,
5567                                          &internal_hostkey_callback,
5568                                          internal_context,
5569                                          &internal_startup_callback,
5570                                          internal_context);
5571     }
5572   else
5573     {
5574       GNUNET_SCHEDULER_add_delayed (
5575                                     GNUNET_TIME_relative_multiply (
5576                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5577                                                                    100),
5578                                     &internal_start, internal_context);
5579     }
5580 }
5581 #if USE_START_HELPER
5582
5583 struct PeerStartHelperContext
5584 {
5585   struct GNUNET_TESTING_PeerGroup *pg;
5586
5587   struct HostData *host;
5588
5589   struct GNUNET_OS_Process *proc;
5590 };
5591
5592 static void
5593 check_peers_started (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5594 {
5595   struct PeerStartHelperContext *helper = cls;
5596   enum GNUNET_OS_ProcessStatusType type;
5597   unsigned long code;
5598   unsigned int i;
5599   GNUNET_TESTING_NotifyDaemonRunning cb;
5600
5601   if (GNUNET_NO == GNUNET_OS_process_status (helper->proc, &type, &code)) /* Still running, wait some more! */
5602   {
5603     GNUNET_SCHEDULER_add_delayed(GNUNET_CONSTANTS_EXEC_WAIT, &check_peers_started, helper);
5604     return;
5605   }
5606
5607   helper->pg->starting--;
5608   if (helper->pg->starting == 0) /* All peers have finished starting! */
5609     {
5610       /* Call the peer started callback for each peer, set proper FSM state (?) */
5611       for (i = 0; i < helper->pg->total; i++)
5612         {
5613           cb = helper->pg->peers[i].daemon->cb;
5614           helper->pg->peers[i].daemon->cb = NULL;
5615           helper->pg->peers[i].daemon->running = GNUNET_YES;
5616           helper->pg->peers[i].daemon->phase = SP_START_DONE;
5617           if (NULL != cb)
5618           {
5619             if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
5620               cb (helper->pg->peers[i].daemon->cb_cls,
5621                   &helper->pg->peers[i].daemon->id,
5622                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5623                   "Failed to execute peerStartHelper.pl, or return code bad!");
5624             else
5625               cb (helper->pg->peers[i].daemon->cb_cls,
5626                   &helper->pg->peers[i].daemon->id,
5627                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5628                   NULL);
5629
5630           }
5631
5632         }
5633     }
5634   GNUNET_OS_process_close(helper->proc);
5635 }
5636
5637 static void
5638 start_peer_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5639 {
5640   struct PeerStartHelperContext *helper = cls;
5641   char *baseservicehome;
5642   char *tempdir;
5643   char *arg;
5644   /* ssh user@host peerStartHelper /path/to/basedirectory */
5645   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (helper->pg->cfg, "PATHS", "SERVICEHOME",
5646                                                                     &baseservicehome));
5647   GNUNET_asprintf(&tempdir, "%s/%s/", baseservicehome, helper->host->hostname);
5648   if (NULL != helper->host->username)
5649     GNUNET_asprintf (&arg, "%s@%s", helper->host->username, helper->host->hostname);
5650   else
5651     GNUNET_asprintf (&arg, "%s", helper->host->hostname);
5652
5653   /* FIXME: Doesn't support ssh_port option! */
5654   helper->proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5655                                   "peerStartHelper.pl", tempdir,  NULL);
5656   GNUNET_assert(helper->proc != NULL);
5657   GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "starting peers with cmd ssh %s %s %s\n", arg, "peerStartHelper.pl", tempdir);
5658   GNUNET_SCHEDULER_add_now (&check_peers_started, helper);
5659   GNUNET_free (tempdir);
5660   GNUNET_free (baseservicehome);
5661   GNUNET_free (arg);
5662 }
5663 #endif
5664
5665 /**
5666  * Function which continues a peer group starting up
5667  * after successfully generating hostkeys for each peer.
5668  *
5669  * @param pg the peer group to continue starting
5670  *
5671  */
5672 void
5673 GNUNET_TESTING_daemons_continue_startup(struct GNUNET_TESTING_PeerGroup *pg)
5674 {
5675   unsigned int i;
5676
5677 #if USE_START_HELPER
5678   if ((pg->num_hosts > 0) && (pg->hostkey_data != NULL))
5679     {
5680       struct PeerStartHelperContext *helper;
5681       pg->starting = pg->num_hosts;
5682       for (i = 0; i < pg->num_hosts; i++)
5683         {
5684           helper = GNUNET_malloc(sizeof(struct PeerStartHelperContext));
5685           helper->pg = pg;
5686           helper->host = &pg->hosts[i];
5687           GNUNET_SCHEDULER_add_now(&start_peer_helper, helper);
5688         }
5689     }
5690   else
5691     {
5692       pg->starting = 0;
5693       for (i = 0; i < pg->total; i++)
5694         {
5695           GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5696                                     &pg->peers[i].internal_context);
5697         }
5698     }
5699 #else
5700   pg->starting = 0;
5701   for (i = 0; i < pg->total; i++)
5702     {
5703       GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5704                                 &pg->peers[i].internal_context);
5705     }
5706 #endif
5707 }
5708
5709 #if USE_START_HELPER
5710 static void
5711 call_hostkey_callbacks (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5712 {
5713   struct GNUNET_TESTING_PeerGroup *pg = cls;
5714   unsigned int i;
5715   for (i = 0; i < pg->total; i++)
5716     {
5717       if (pg->peers[i].internal_context.hostkey_callback != NULL)
5718         pg->peers[i].internal_context.hostkey_callback (pg->peers[i].internal_context.hostkey_cls,
5719                                                            &pg->peers[i].daemon->id,
5720                                                            pg->peers[i].daemon,
5721                                                            NULL);
5722     }
5723
5724   if (pg->peers[0].internal_context.hostkey_callback == NULL)
5725     GNUNET_TESTING_daemons_continue_startup (pg);
5726 }
5727 #endif
5728
5729 /**
5730  * Start count gnunet instances with the same set of transports and
5731  * applications.  The port numbers (any option called "PORT") will be
5732  * adjusted to ensure that no two peers running on the same system
5733  * have the same port(s) in their respective configurations.
5734  *
5735  * @param cfg configuration template to use
5736  * @param total number of daemons to start
5737  * @param max_concurrent_connections for testing, how many peers can
5738  *                                   we connect to simultaneously
5739  * @param max_concurrent_ssh when starting with ssh, how many ssh
5740  *        connections will we allow at once (based on remote hosts allowed!)
5741  * @param timeout total time allowed for peers to start
5742  * @param hostkey_callback function to call on each peers hostkey generation
5743  *        if NULL, peers will be started by this call, if non-null,
5744  *        GNUNET_TESTING_daemons_continue_startup must be called after
5745  *        successful hostkey generation
5746  * @param hostkey_cls closure for hostkey callback
5747  * @param cb function to call on each daemon that was started
5748  * @param cb_cls closure for cb
5749  * @param connect_callback function to call each time two hosts are connected
5750  * @param connect_callback_cls closure for connect_callback
5751  * @param hostnames linked list of host structs to use to start peers on
5752  *                  (NULL to run on localhost only)
5753  *
5754  * @return NULL on error, otherwise handle to control peer group
5755  */
5756 struct GNUNET_TESTING_PeerGroup *
5757 GNUNET_TESTING_daemons_start(const struct GNUNET_CONFIGURATION_Handle *cfg,
5758                              unsigned int total,
5759                              unsigned int max_concurrent_connections,
5760                              unsigned int max_concurrent_ssh,
5761                              struct GNUNET_TIME_Relative timeout,
5762                              GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
5763                              void *hostkey_cls,
5764                              GNUNET_TESTING_NotifyDaemonRunning cb,
5765                              void *cb_cls,
5766                              GNUNET_TESTING_NotifyConnection connect_callback,
5767                              void *connect_callback_cls,
5768                              const struct GNUNET_TESTING_Host *hostnames)
5769 {
5770   struct GNUNET_TESTING_PeerGroup *pg;
5771   const struct GNUNET_TESTING_Host *hostpos;
5772   const char *hostname;
5773   const char *username;
5774   char *baseservicehome;
5775   char *newservicehome;
5776   char *tmpdir;
5777   char *hostkeys_file;
5778   char *arg;
5779   char *ssh_port_str;
5780   struct GNUNET_DISK_FileHandle *fd;
5781   struct GNUNET_CONFIGURATION_Handle *pcfg;
5782   unsigned int off;
5783   struct OutstandingSSH *ssh_entry;
5784   unsigned int hostcnt;
5785   unsigned int i;
5786   uint16_t minport;
5787   uint16_t sshport;
5788   uint32_t upnum;
5789   uint32_t fdnum;
5790   uint64_t fs;
5791   uint64_t total_hostkeys;
5792   struct GNUNET_OS_Process *proc;
5793
5794   username = NULL;
5795   if (0 == total)
5796     {
5797       GNUNET_break (0);
5798       return NULL;
5799     }
5800
5801   upnum = 0;
5802   fdnum = 0;
5803   pg = GNUNET_malloc (sizeof (struct GNUNET_TESTING_PeerGroup));
5804   pg->cfg = cfg;
5805   pg->notify_connection = connect_callback;
5806   pg->notify_connection_cls = connect_callback_cls;
5807   pg->total = total;
5808   pg->max_timeout = GNUNET_TIME_relative_to_absolute (timeout);
5809   pg->peers = GNUNET_malloc (total * sizeof (struct PeerData));
5810   pg->max_outstanding_connections = max_concurrent_connections;
5811   pg->max_concurrent_ssh = max_concurrent_ssh;
5812   if (NULL != hostnames)
5813     {
5814       off = 0;
5815       hostpos = hostnames;
5816       while (hostpos != NULL)
5817         {
5818           hostpos = hostpos->next;
5819           off++;
5820         }
5821       pg->hosts = GNUNET_malloc (off * sizeof (struct HostData));
5822       off = 0;
5823
5824       hostpos = hostnames;
5825       while (hostpos != NULL)
5826         {
5827           pg->hosts[off].minport = LOW_PORT;
5828           pg->hosts[off].hostname = GNUNET_strdup (hostpos->hostname);
5829           if (hostpos->username != NULL)
5830             pg->hosts[off].username = GNUNET_strdup (hostpos->username);
5831           pg->hosts[off].sshport = hostpos->port;
5832           hostpos = hostpos->next;
5833           off++;
5834         }
5835
5836       if (off == 0)
5837         {
5838           pg->hosts = NULL;
5839         }
5840       hostcnt = off;
5841       minport = 0;
5842       pg->num_hosts = off;
5843     }
5844   else
5845     {
5846       hostcnt = 0;
5847       minport = LOW_PORT;
5848     }
5849
5850   /* Create the servicehome directory for each remote peer */
5851   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg, "PATHS", "SERVICEHOME",
5852                                                                     &baseservicehome));
5853   for (i = 0; i < pg->num_hosts; i++)
5854     {
5855       ssh_entry = GNUNET_malloc(sizeof(struct OutstandingSSH));
5856       ssh_entry->hostname = pg->hosts[i].hostname; /* Don't free! */
5857       GNUNET_CONTAINER_DLL_insert(pg->ssh_head, pg->ssh_tail, ssh_entry);
5858       GNUNET_asprintf(&tmpdir, "%s/%s", baseservicehome, pg->hosts[i].hostname);
5859       if (NULL != pg->hosts[i].username)
5860         GNUNET_asprintf (&arg, "%s@%s", pg->hosts[i].username,
5861                          pg->hosts[i].hostname);
5862       else
5863         GNUNET_asprintf (&arg, "%s", pg->hosts[i].hostname);
5864       if (pg->hosts[i].sshport != 0)
5865         {
5866           GNUNET_asprintf (&ssh_port_str, "%d", pg->hosts[i].sshport);
5867           proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", "-P",
5868                                           ssh_port_str,
5869 #if !DEBUG_TESTING
5870                                           "-q",
5871 #endif
5872                                           arg, "mkdir -p", tmpdir,
5873                                           NULL);
5874         }
5875       else
5876         proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5877                                         "mkdir -p", tmpdir, NULL);
5878       GNUNET_assert(proc != NULL);
5879       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5880                   "Creating remote dir with command ssh %s %s %s\n", arg,
5881                   " mkdir -p ", tmpdir);
5882       GNUNET_free(tmpdir);
5883       GNUNET_free(arg);
5884       GNUNET_OS_process_wait (proc);
5885       GNUNET_OS_process_close(proc);
5886     }
5887   GNUNET_free(baseservicehome);
5888
5889   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (cfg, "TESTING",
5890                                                            "HOSTKEYSFILE",
5891                                                            &hostkeys_file))
5892     {
5893       if (GNUNET_YES != GNUNET_DISK_file_test (hostkeys_file))
5894         GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Couldn't read hostkeys file!\n");
5895       else
5896         {
5897           /* Check hostkey file size, read entire thing into memory */
5898           fd = GNUNET_DISK_file_open (hostkeys_file, GNUNET_DISK_OPEN_READ,
5899                                       GNUNET_DISK_PERM_NONE);
5900           if (NULL == fd)
5901             {
5902               GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", hostkeys_file);
5903               return NULL;
5904             }
5905
5906           if (GNUNET_YES != GNUNET_DISK_file_size (hostkeys_file, &fs,
5907                                                    GNUNET_YES))
5908             fs = 0;
5909
5910           GNUNET_log (
5911                       GNUNET_ERROR_TYPE_DEBUG,
5912                       "Found file size %llu for hostkeys, expect hostkeys to be size %d\n",
5913                       fs, HOSTKEYFILESIZE);
5914
5915           if (fs % HOSTKEYFILESIZE != 0)
5916             {
5917               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5918                           "File size %llu seems incorrect for hostkeys...\n",
5919                           fs);
5920             }
5921           else
5922             {
5923               total_hostkeys = fs / HOSTKEYFILESIZE;
5924               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5925                           "Will read %llu hostkeys from file\n", total_hostkeys);
5926               pg->hostkey_data = GNUNET_malloc_large (fs);
5927               GNUNET_assert (fs == GNUNET_DISK_file_read (fd, pg->hostkey_data, fs));
5928               GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_close(fd));
5929             }
5930         }
5931       GNUNET_free(hostkeys_file);
5932     }
5933
5934   for (off = 0; off < total; off++)
5935     {
5936       if (hostcnt > 0)
5937         {
5938           hostname = pg->hosts[off % hostcnt].hostname;
5939           username = pg->hosts[off % hostcnt].username;
5940           sshport = pg->hosts[off % hostcnt].sshport;
5941           pcfg = make_config (cfg, off, &pg->hosts[off % hostcnt].minport,
5942                               &upnum, hostname, &fdnum);
5943         }
5944       else
5945         {
5946           hostname = NULL;
5947           username = NULL;
5948           sshport = 0;
5949           pcfg = make_config (cfg, off, &minport, &upnum, hostname, &fdnum);
5950         }
5951
5952       if (NULL == pcfg)
5953         {
5954           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5955           ("Could not create configuration for peer number %u on `%s'!\n"),
5956                       off, hostname == NULL ? "localhost" : hostname);
5957           continue;
5958         }
5959
5960       if (GNUNET_YES
5961           == GNUNET_CONFIGURATION_get_value_string (pcfg, "PATHS",
5962                                                     "SERVICEHOME",
5963                                                     &baseservicehome))
5964         {
5965           if (hostname != NULL)
5966             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", baseservicehome, hostname, off);
5967           else
5968             GNUNET_asprintf (&newservicehome, "%s/%d/", baseservicehome, off);
5969 #if !USE_START_HELPER
5970           GNUNET_free (baseservicehome);
5971 #endif
5972         }
5973       else
5974         {
5975           tmpdir = getenv ("TMPDIR");
5976           tmpdir = tmpdir ? tmpdir : "/tmp";
5977           if (hostname != NULL)
5978             GNUNET_asprintf (&newservicehome, "%s/%s/%s/%d/", tmpdir, hostname,
5979                              "gnunet-testing-test-test", off);
5980           else
5981             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", tmpdir,
5982                              "gnunet-testing-test-test", off);
5983         }
5984       GNUNET_CONFIGURATION_set_value_string (pcfg, "PATHS", "SERVICEHOME",
5985                                              newservicehome);
5986       GNUNET_free (newservicehome);
5987       pg->peers[off].cfg = pcfg;
5988       pg->peers[off].pg = pg;
5989       pg->peers[off].internal_context.peer = &pg->peers[off];
5990       pg->peers[off].internal_context.timeout = timeout;
5991       pg->peers[off].internal_context.hostname = hostname;
5992       pg->peers[off].internal_context.username = username;
5993       pg->peers[off].internal_context.sshport = sshport;
5994       if (pg->hostkey_data != NULL)
5995         pg->peers[off].internal_context.hostkey = &pg->hostkey_data[off
5996             * HOSTKEYFILESIZE];
5997       pg->peers[off].internal_context.hostkey_callback = hostkey_callback;
5998       pg->peers[off].internal_context.hostkey_cls = hostkey_cls;
5999       pg->peers[off].internal_context.start_cb = cb;
6000       pg->peers[off].internal_context.start_cb_cls = cb_cls;
6001 #if !USE_START_HELPER
6002       GNUNET_SCHEDULER_add_now (&internal_start,
6003                                 &pg->peers[off].internal_context);
6004 #else
6005       if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6006         {
6007           pg->peers[off].daemon = GNUNET_TESTING_daemon_start (pcfg,
6008                                        timeout,
6009                                        GNUNET_YES,
6010                                        hostname,
6011                                        username,
6012                                        sshport,
6013                                        pg->peers[off].internal_context.hostkey,
6014                                        &internal_hostkey_callback,
6015                                        &pg->peers[off].internal_context,
6016                                        &internal_startup_callback,
6017                                        &pg->peers[off].internal_context);
6018           /**
6019            * At this point, given that we had a hostkeyfile,
6020            * we can call the hostkey callback!
6021            * But first, we should copy (rsync) all of the configs
6022            * and hostkeys to the remote peers.  Then let topology
6023            * creation happen, then call the peer start helper processes,
6024            * then set pg->whatever_phase for each peer and let them
6025            * enter the fsm to get the HELLO's for peers and start connecting.
6026            */
6027         }
6028       else
6029         {
6030           GNUNET_SCHEDULER_add_now (&internal_start,
6031                                     &pg->peers[off].internal_context);
6032         }
6033
6034 #endif
6035     }
6036
6037 #if USE_START_HELPER /* Now the peergroup has been set up, hostkeys and configs written to files. */
6038   if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6039     {
6040       for (off = 0; off < hostcnt; off++)
6041         {
6042           GNUNET_asprintf(&newservicehome, "%s/%s/", baseservicehome, pg->hosts[off].hostname);
6043
6044           if (NULL != username)
6045             GNUNET_asprintf (&arg, "%s@%s:%s/%s", username, pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6046           else
6047             GNUNET_asprintf (&arg, "%s:%s/%s", pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6048
6049           /* FIXME: Doesn't support ssh_port option! */
6050           proc = GNUNET_OS_start_process (NULL, NULL, "rsync", "rsync", "-r", newservicehome, arg, NULL);
6051
6052           GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "copying directory with command rsync -r %s %s\n", newservicehome, arg);
6053
6054           GNUNET_free (arg);
6055           if (NULL == proc)
6056             {
6057               GNUNET_log (
6058                           GNUNET_ERROR_TYPE_ERROR,
6059                           _
6060                           ("Could not start `%s' process to copy configuration directory.\n"),
6061                           "scp");
6062               GNUNET_assert(0);
6063             }
6064           GNUNET_OS_process_wait (proc);
6065           GNUNET_OS_process_close (proc);
6066         }
6067       /* Now all the configuration files and hostkeys are copied to the remote host.  Call the hostkey callback for each peer! */
6068       GNUNET_SCHEDULER_add_now(&call_hostkey_callbacks, pg);
6069     }
6070   GNUNET_free (baseservicehome);
6071 #endif
6072   return pg;
6073 }
6074
6075 /*
6076  * Get a daemon by number, so callers don't have to do nasty
6077  * offsetting operation.
6078  */
6079 struct GNUNET_TESTING_Daemon *
6080 GNUNET_TESTING_daemon_get(struct GNUNET_TESTING_PeerGroup *pg,
6081                           unsigned int position)
6082 {
6083   if (position < pg->total)
6084     return pg->peers[position].daemon;
6085   else
6086     return NULL;
6087 }
6088
6089 /*
6090  * Get a daemon by peer identity, so callers can
6091  * retrieve the daemon without knowing it's offset.
6092  *
6093  * @param pg the peer group to retrieve the daemon from
6094  * @param peer_id the peer identity of the daemon to retrieve
6095  *
6096  * @return the daemon on success, or NULL if no such peer identity is found
6097  */
6098 struct GNUNET_TESTING_Daemon *
6099 GNUNET_TESTING_daemon_get_by_id(struct GNUNET_TESTING_PeerGroup *pg,
6100                                 struct GNUNET_PeerIdentity *peer_id)
6101 {
6102   unsigned int i;
6103
6104   for (i = 0; i < pg->total; i++)
6105     {
6106       if (0 == memcmp (&pg->peers[i].daemon->id, peer_id,
6107                        sizeof(struct GNUNET_PeerIdentity)))
6108         return pg->peers[i].daemon;
6109     }
6110
6111   return NULL;
6112 }
6113
6114 /**
6115  * Prototype of a function that will be called when a
6116  * particular operation was completed the testing library.
6117  *
6118  * @param cls closure (a struct RestartContext)
6119  * @param id id of the peer that was restarted
6120  * @param cfg handle to the configuration of the peer
6121  * @param d handle to the daemon that was restarted
6122  * @param emsg NULL on success
6123  */
6124 void
6125 restart_callback(void *cls, const struct GNUNET_PeerIdentity *id,
6126                  const struct GNUNET_CONFIGURATION_Handle *cfg,
6127                  struct GNUNET_TESTING_Daemon *d, const char *emsg)
6128 {
6129   struct RestartContext *restart_context = cls;
6130
6131   if (emsg == NULL)
6132     {
6133       restart_context->peers_restarted++;
6134     }
6135   else
6136     {
6137       restart_context->peers_restart_failed++;
6138     }
6139
6140   if (restart_context->peers_restarted == restart_context->peer_group->total)
6141     {
6142       restart_context->callback (restart_context->callback_cls, NULL);
6143       GNUNET_free (restart_context);
6144     }
6145   else if (restart_context->peers_restart_failed
6146       + restart_context->peers_restarted == restart_context->peer_group->total)
6147     {
6148       restart_context->callback (restart_context->callback_cls,
6149                                  "Failed to restart peers!");
6150       GNUNET_free (restart_context);
6151     }
6152
6153 }
6154
6155 /**
6156  * Callback for informing us about a successful
6157  * or unsuccessful churn stop call.
6158  *
6159  * @param cls a ChurnContext
6160  * @param emsg NULL on success, non-NULL on failure
6161  *
6162  */
6163 void
6164 churn_stop_callback(void *cls, const char *emsg)
6165 {
6166   struct ShutdownContext *shutdown_ctx = cls;
6167   struct ChurnContext *churn_ctx = shutdown_ctx->cb_cls;
6168   unsigned int total_left;
6169   char *error_message;
6170
6171   error_message = NULL;
6172   shutdown_ctx->outstanding--;
6173
6174   if (emsg != NULL)
6175     {
6176       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6177                   "Churn stop callback failed with error `%s'\n", emsg);
6178       churn_ctx->num_failed_stop++;
6179     }
6180   else
6181     {
6182       churn_ctx->num_to_stop--;
6183     }
6184
6185 #if DEBUG_CHURN
6186   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6187       "Stopped peer, %d left.\n", churn_ctx->num_to_stop);
6188 #endif
6189   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
6190       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
6191
6192   if (total_left == 0)
6193     {
6194       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
6195         {
6196           GNUNET_asprintf (
6197                            &error_message,
6198                            "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
6199                            churn_ctx->num_failed_start,
6200                            churn_ctx->num_failed_stop);
6201         }
6202       churn_ctx->cb (churn_ctx->cb_cls, error_message);
6203       GNUNET_free_non_null (error_message);
6204       GNUNET_free (churn_ctx);
6205       GNUNET_free (shutdown_ctx);
6206     }
6207 }
6208
6209 /**
6210  * Count the number of running peers.
6211  *
6212  * @param pg handle for the peer group
6213  *
6214  * @return the number of currently running peers in the peer group
6215  */
6216 unsigned int
6217 GNUNET_TESTING_daemons_running(struct GNUNET_TESTING_PeerGroup *pg)
6218 {
6219   unsigned int i;
6220   unsigned int running = 0;
6221   for (i = 0; i < pg->total; i++)
6222     {
6223       if (pg->peers[i].daemon->running == GNUNET_YES)
6224         {
6225           GNUNET_assert (running != -1);
6226           running++;
6227         }
6228     }
6229   return running;
6230 }
6231
6232 /**
6233  * Task to rate limit the number of outstanding peer shutdown
6234  * requests.  This is necessary for making sure we don't do
6235  * too many ssh connections at once, but is generally nicer
6236  * to any system as well (graduated task starts, as opposed
6237  * to calling gnunet-arm N times all at once).
6238  */
6239 static void
6240 schedule_churn_shutdown_task(void *cls,
6241                              const struct GNUNET_SCHEDULER_TaskContext *tc)
6242 {
6243   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6244   struct ShutdownContext *shutdown_ctx;
6245   struct ChurnContext *churn_ctx;
6246   GNUNET_assert (peer_shutdown_ctx != NULL);
6247   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6248   GNUNET_assert (shutdown_ctx != NULL);
6249   churn_ctx = (struct ChurnContext *) shutdown_ctx->cb_cls;
6250   if (shutdown_ctx->outstanding > churn_ctx->pg->max_concurrent_ssh)
6251     GNUNET_SCHEDULER_add_delayed (
6252                                   GNUNET_TIME_relative_multiply (
6253                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
6254                                                                  100),
6255                                   &schedule_churn_shutdown_task,
6256                                   peer_shutdown_ctx);
6257   else
6258     {
6259       shutdown_ctx->outstanding++;
6260       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6261                                   shutdown_ctx->timeout, shutdown_ctx->cb,
6262                                   shutdown_ctx, GNUNET_NO, GNUNET_YES);
6263       GNUNET_free (peer_shutdown_ctx);
6264     }
6265 }
6266
6267 /**
6268  * Simulate churn by stopping some peers (and possibly
6269  * re-starting others if churn is called multiple times).  This
6270  * function can only be used to create leave-join churn (peers "never"
6271  * leave for good).  First "voff" random peers that are currently
6272  * online will be taken offline; then "von" random peers that are then
6273  * offline will be put back online.  No notifications will be
6274  * generated for any of these operations except for the callback upon
6275  * completion.
6276  *
6277  * @param pg handle for the peer group
6278  * @param voff number of peers that should go offline
6279  * @param von number of peers that should come back online;
6280  *            must be zero on first call (since "testbed_start"
6281  *            always starts all of the peers)
6282  * @param timeout how long to wait for operations to finish before
6283  *        giving up
6284  * @param cb function to call at the end
6285  * @param cb_cls closure for cb
6286  */
6287 void
6288 GNUNET_TESTING_daemons_churn(struct GNUNET_TESTING_PeerGroup *pg,
6289                              unsigned int voff, unsigned int von,
6290                              struct GNUNET_TIME_Relative timeout,
6291                              GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6292 {
6293   struct ChurnContext *churn_ctx;
6294   struct ShutdownContext *shutdown_ctx;
6295   struct PeerShutdownContext *peer_shutdown_ctx;
6296   struct PeerRestartContext *peer_restart_ctx;
6297   struct ChurnRestartContext *churn_startup_ctx;
6298
6299   unsigned int running;
6300   unsigned int stopped;
6301   unsigned int total_running;
6302   unsigned int total_stopped;
6303   unsigned int i;
6304   unsigned int *running_arr;
6305   unsigned int *stopped_arr;
6306   unsigned int *running_permute;
6307   unsigned int *stopped_permute;
6308
6309   shutdown_ctx = NULL;
6310   peer_shutdown_ctx = NULL;
6311   peer_restart_ctx = NULL;
6312   churn_startup_ctx = NULL;
6313
6314   running = 0;
6315   stopped = 0;
6316
6317   if ((von == 0) && (voff == 0)) /* No peers at all? */
6318     {
6319       cb (cb_cls, NULL);
6320       return;
6321     }
6322
6323   for (i = 0; i < pg->total; i++)
6324     {
6325       if (pg->peers[i].daemon->running == GNUNET_YES)
6326         {
6327           GNUNET_assert (running != -1);
6328           running++;
6329         }
6330       else
6331         {
6332           GNUNET_assert (stopped != -1);
6333           stopped++;
6334         }
6335     }
6336
6337   if (voff > running)
6338     {
6339       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6340                   "Trying to stop more peers than are currently running!\n");
6341       cb (cb_cls, "Trying to stop more peers than are currently running!");
6342       return;
6343     }
6344
6345   if (von > stopped)
6346     {
6347       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6348                   "Trying to start more peers than are currently stopped!\n");
6349       cb (cb_cls, "Trying to start more peers than are currently stopped!");
6350       return;
6351     }
6352
6353   churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6354
6355   running_arr = NULL;
6356   if (running > 0)
6357     running_arr = GNUNET_malloc (running * sizeof (unsigned int));
6358
6359   stopped_arr = NULL;
6360   if (stopped > 0)
6361     stopped_arr = GNUNET_malloc (stopped * sizeof (unsigned int));
6362
6363   running_permute = NULL;
6364   stopped_permute = NULL;
6365
6366   if (running > 0)
6367     running_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6368                                                     running);
6369   if (stopped > 0)
6370     stopped_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6371                                                     stopped);
6372
6373   total_running = running;
6374   total_stopped = stopped;
6375   running = 0;
6376   stopped = 0;
6377
6378   churn_ctx->num_to_start = von;
6379   churn_ctx->num_to_stop = voff;
6380   churn_ctx->cb = cb;
6381   churn_ctx->cb_cls = cb_cls;
6382   churn_ctx->pg = pg;
6383
6384   for (i = 0; i < pg->total; i++)
6385     {
6386       if (pg->peers[i].daemon->running == GNUNET_YES)
6387         {
6388           GNUNET_assert ((running_arr != NULL) && (total_running > running));
6389           running_arr[running] = i;
6390           running++;
6391         }
6392       else
6393         {
6394           GNUNET_assert ((stopped_arr != NULL) && (total_stopped > stopped));
6395           stopped_arr[stopped] = i;
6396           stopped++;
6397         }
6398     }
6399
6400   GNUNET_assert (running >= voff);
6401   if (voff > 0)
6402     {
6403       shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6404       shutdown_ctx->cb = &churn_stop_callback;
6405       shutdown_ctx->cb_cls = churn_ctx;
6406       shutdown_ctx->total_peers = voff;
6407       shutdown_ctx->timeout = timeout;
6408     }
6409
6410   for (i = 0; i < voff; i++)
6411     {
6412 #if DEBUG_CHURN
6413       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Stopping peer %d!\n",
6414           running_permute[i]);
6415 #endif
6416       GNUNET_assert (running_arr != NULL);
6417       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6418       peer_shutdown_ctx->daemon
6419           = pg->peers[running_arr[running_permute[i]]].daemon;
6420       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6421       GNUNET_SCHEDULER_add_now (&schedule_churn_shutdown_task,
6422                                 peer_shutdown_ctx);
6423
6424       /*
6425        GNUNET_TESTING_daemon_stop (pg->peers[running_arr[running_permute[i]]].daemon,
6426        timeout,
6427        &churn_stop_callback, churn_ctx,
6428        GNUNET_NO, GNUNET_YES); */
6429     }
6430
6431   GNUNET_assert (stopped >= von);
6432   if (von > 0)
6433     {
6434       churn_startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6435       churn_startup_ctx->churn_ctx = churn_ctx;
6436       churn_startup_ctx->timeout = timeout;
6437       churn_startup_ctx->pg = pg;
6438     }
6439   for (i = 0; i < von; i++)
6440     {
6441 #if DEBUG_CHURN
6442       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Starting up peer %d!\n",
6443           stopped_permute[i]);
6444 #endif
6445       GNUNET_assert (stopped_arr != NULL);
6446       peer_restart_ctx = GNUNET_malloc (sizeof (struct PeerRestartContext));
6447       peer_restart_ctx->churn_restart_ctx = churn_startup_ctx;
6448       peer_restart_ctx->daemon
6449           = pg->peers[stopped_arr[stopped_permute[i]]].daemon;
6450       GNUNET_SCHEDULER_add_now (&schedule_churn_restart, peer_restart_ctx);
6451       /*
6452        GNUNET_TESTING_daemon_start_stopped(pg->peers[stopped_arr[stopped_permute[i]]].daemon,
6453        timeout, &churn_start_callback, churn_ctx); */
6454     }
6455
6456   GNUNET_free_non_null (running_arr);
6457   GNUNET_free_non_null (stopped_arr);
6458   GNUNET_free_non_null (running_permute);
6459   GNUNET_free_non_null (stopped_permute);
6460 }
6461
6462 /**
6463  * Restart all peers in the given group.
6464  *
6465  * @param pg the handle to the peer group
6466  * @param callback function to call on completion (or failure)
6467  * @param callback_cls closure for the callback function
6468  */
6469 void
6470 GNUNET_TESTING_daemons_restart(struct GNUNET_TESTING_PeerGroup *pg,
6471                                GNUNET_TESTING_NotifyCompletion callback,
6472                                void *callback_cls)
6473 {
6474   struct RestartContext *restart_context;
6475   unsigned int off;
6476
6477   if (pg->total > 0)
6478     {
6479       restart_context = GNUNET_malloc (sizeof (struct RestartContext));
6480       restart_context->peer_group = pg;
6481       restart_context->peers_restarted = 0;
6482       restart_context->callback = callback;
6483       restart_context->callback_cls = callback_cls;
6484
6485       for (off = 0; off < pg->total; off++)
6486         {
6487           GNUNET_TESTING_daemon_restart (pg->peers[off].daemon,
6488                                          &restart_callback, restart_context);
6489         }
6490     }
6491 }
6492
6493 /**
6494  * Start or stop an individual peer from the given group.
6495  *
6496  * @param pg handle to the peer group
6497  * @param offset which peer to start or stop
6498  * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
6499  * @param timeout how long to wait for shutdown
6500  * @param cb function to call at the end
6501  * @param cb_cls closure for cb
6502  */
6503 void
6504 GNUNET_TESTING_daemons_vary(struct GNUNET_TESTING_PeerGroup *pg,
6505                             unsigned int offset, int desired_status,
6506                             struct GNUNET_TIME_Relative timeout,
6507                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6508 {
6509   struct ShutdownContext *shutdown_ctx;
6510   struct ChurnRestartContext *startup_ctx;
6511   struct ChurnContext *churn_ctx;
6512
6513   if (GNUNET_NO == desired_status)
6514     {
6515       if (NULL != pg->peers[offset].daemon)
6516         {
6517           shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6518           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6519           churn_ctx->num_to_start = 0;
6520           churn_ctx->num_to_stop = 1;
6521           churn_ctx->cb = cb;
6522           churn_ctx->cb_cls = cb_cls;
6523           shutdown_ctx->cb_cls = churn_ctx;
6524           GNUNET_TESTING_daemon_stop (pg->peers[offset].daemon, timeout,
6525                                       &churn_stop_callback, shutdown_ctx,
6526                                       GNUNET_NO, GNUNET_YES);
6527         }
6528     }
6529   else if (GNUNET_YES == desired_status)
6530     {
6531       if (NULL == pg->peers[offset].daemon)
6532         {
6533           startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6534           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6535           churn_ctx->num_to_start = 1;
6536           churn_ctx->num_to_stop = 0;
6537           churn_ctx->cb = cb;
6538           churn_ctx->cb_cls = cb_cls;
6539           startup_ctx->churn_ctx = churn_ctx;
6540           GNUNET_TESTING_daemon_start_stopped (pg->peers[offset].daemon,
6541                                                timeout, &churn_start_callback,
6542                                                startup_ctx);
6543         }
6544     }
6545   else
6546     GNUNET_break (0);
6547 }
6548
6549 /**
6550  * Callback for shutting down peers in a peer group.
6551  *
6552  * @param cls closure (struct ShutdownContext)
6553  * @param emsg NULL on success
6554  */
6555 void
6556 internal_shutdown_callback(void *cls, const char *emsg)
6557 {
6558   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6559   struct ShutdownContext *shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6560   unsigned int off;
6561   struct OutstandingSSH *ssh_pos;
6562
6563   shutdown_ctx->outstanding--;
6564   if (peer_shutdown_ctx->daemon->hostname != NULL)
6565     decrement_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6566                                    shutdown_ctx->pg);
6567
6568   if (emsg == NULL)
6569     {
6570       shutdown_ctx->peers_down++;
6571     }
6572   else
6573     {
6574       shutdown_ctx->peers_failed++;
6575     }
6576
6577   if ((shutdown_ctx->cb != NULL) && (shutdown_ctx->peers_down
6578       + shutdown_ctx->peers_failed == shutdown_ctx->total_peers))
6579     {
6580       if (shutdown_ctx->peers_failed > 0)
6581         shutdown_ctx->cb (shutdown_ctx->cb_cls,
6582                           "Not all peers successfully shut down!");
6583       else
6584         shutdown_ctx->cb (shutdown_ctx->cb_cls, NULL);
6585
6586       GNUNET_free (shutdown_ctx->pg->peers);
6587       GNUNET_free_non_null(shutdown_ctx->pg->hostkey_data);
6588       for (off = 0; off < shutdown_ctx->pg->num_hosts; off++)
6589         {
6590           GNUNET_free (shutdown_ctx->pg->hosts[off].hostname);
6591           GNUNET_free_non_null (shutdown_ctx->pg->hosts[off].username);
6592         }
6593       GNUNET_free_non_null (shutdown_ctx->pg->hosts);
6594       while (NULL != (ssh_pos = shutdown_ctx->pg->ssh_head))
6595         {
6596           GNUNET_CONTAINER_DLL_remove(shutdown_ctx->pg->ssh_head, shutdown_ctx->pg->ssh_tail, ssh_pos);
6597           GNUNET_free(ssh_pos);
6598         }
6599       GNUNET_free (shutdown_ctx->pg);
6600       GNUNET_free (shutdown_ctx);
6601     }
6602   GNUNET_free(peer_shutdown_ctx);
6603 }
6604
6605 /**
6606  * Task to rate limit the number of outstanding peer shutdown
6607  * requests.  This is necessary for making sure we don't do
6608  * too many ssh connections at once, but is generally nicer
6609  * to any system as well (graduated task starts, as opposed
6610  * to calling gnunet-arm N times all at once).
6611  */
6612 static void
6613 schedule_shutdown_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6614 {
6615   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6616   struct ShutdownContext *shutdown_ctx;
6617
6618   GNUNET_assert (peer_shutdown_ctx != NULL);
6619   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6620   GNUNET_assert (shutdown_ctx != NULL);
6621
6622   if ((shutdown_ctx->outstanding < shutdown_ctx->pg->max_concurrent_ssh)
6623       || ((peer_shutdown_ctx->daemon->hostname != NULL)
6624           && (count_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6625                                          shutdown_ctx->pg)
6626               < shutdown_ctx->pg->max_concurrent_ssh)))
6627     {
6628       if (peer_shutdown_ctx->daemon->hostname != NULL)
6629         increment_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6630                                        shutdown_ctx->pg);
6631       shutdown_ctx->outstanding++;
6632       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6633                                   shutdown_ctx->timeout,
6634                                   &internal_shutdown_callback, peer_shutdown_ctx,
6635                                   GNUNET_YES, GNUNET_NO);
6636     }
6637   else
6638     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
6639                                                                  100),
6640                                   &schedule_shutdown_task, peer_shutdown_ctx);
6641
6642 }
6643
6644 /**
6645  * Shutdown all peers started in the given group.
6646  *
6647  * @param pg handle to the peer group
6648  * @param timeout how long to wait for shutdown
6649  * @param cb callback to notify upon success or failure
6650  * @param cb_cls closure for cb
6651  */
6652 void
6653 GNUNET_TESTING_daemons_stop(struct GNUNET_TESTING_PeerGroup *pg,
6654                             struct GNUNET_TIME_Relative timeout,
6655                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6656 {
6657   unsigned int off;
6658   struct ShutdownContext *shutdown_ctx;
6659   struct PeerShutdownContext *peer_shutdown_ctx;
6660 #if OLD
6661   struct PeerConnection *conn_iter;
6662   struct PeerConnection *temp_conn;
6663 #endif
6664
6665   GNUNET_assert (pg->total > 0);
6666
6667   shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6668   shutdown_ctx->cb = cb;
6669   shutdown_ctx->cb_cls = cb_cls;
6670   shutdown_ctx->total_peers = pg->total;
6671   shutdown_ctx->timeout = timeout;
6672   shutdown_ctx->pg = pg;
6673   /* shtudown_ctx->outstanding = 0; */
6674
6675   for (off = 0; off < pg->total; off++)
6676     {
6677       GNUNET_assert (NULL != pg->peers[off].daemon);
6678       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6679       peer_shutdown_ctx->daemon = pg->peers[off].daemon;
6680       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6681       GNUNET_SCHEDULER_add_now (&schedule_shutdown_task, peer_shutdown_ctx);
6682
6683       if (NULL != pg->peers[off].cfg)
6684       {
6685         GNUNET_CONFIGURATION_destroy (pg->peers[off].cfg);
6686         pg->peers[off].cfg = NULL;
6687       }
6688 #if OLD
6689       conn_iter = pg->peers[off].allowed_peers_head;
6690       while (conn_iter != NULL)
6691         {
6692           temp_conn = conn_iter->next;
6693           GNUNET_free(conn_iter);
6694           conn_iter = temp_conn;
6695         }
6696
6697       conn_iter = pg->peers[off].connect_peers_head;
6698       while (conn_iter != NULL)
6699         {
6700           temp_conn = conn_iter->next;
6701           GNUNET_free(conn_iter);
6702           conn_iter = temp_conn;
6703         }
6704
6705       conn_iter = pg->peers[off].blacklisted_peers_head;
6706       while (conn_iter != NULL)
6707         {
6708           temp_conn = conn_iter->next;
6709           GNUNET_free(conn_iter);
6710           conn_iter = temp_conn;
6711         }
6712
6713       conn_iter = pg->peers[off].connect_peers_working_set_head;
6714       while (conn_iter != NULL)
6715         {
6716           temp_conn = conn_iter->next;
6717           GNUNET_free(conn_iter);
6718           conn_iter = temp_conn;
6719         }
6720 #else
6721       if (pg->peers[off].allowed_peers != NULL)
6722       GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].allowed_peers);
6723       if (pg->peers[off].connect_peers != NULL)
6724       GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].connect_peers);
6725       if (pg->peers[off].blacklisted_peers != NULL)
6726       GNUNET_CONTAINER_multihashmap_destroy (pg->
6727           peers[off].blacklisted_peers);
6728 #endif
6729     }
6730 }
6731
6732 /* end of testing_group.c */