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_YES);
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   GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Meter has %d left\n",
2379               conn_meter->total - conn_meter->completed);
2380   reset_meter (conn_meter);
2381   free_meter (conn_meter);
2382   return connect_attempts;
2383 }
2384
2385 #if !OLD
2386 /**
2387  * Iterator over hash map entries.
2388  *
2389  * @param cls closure the peer group
2390  * @param key the key stored in the hashmap is the
2391  *            index of the peer to connect to
2392  * @param value value in the hash map, handle to the peer daemon
2393  * @return GNUNET_YES if we should continue to
2394  *         iterate,
2395  *         GNUNET_NO if not.
2396  */
2397 static int
2398 unblacklist_iterator (void *cls,
2399     const GNUNET_HashCode * key,
2400     void *value)
2401   {
2402     struct UnblacklistContext *un_ctx = cls;
2403     uint32_t second_pos;
2404
2405     uid_from_hash (key, &second_pos);
2406
2407     unblacklist_connections(un_ctx->pg, un_ctx->first_uid, second_pos);
2408
2409     return GNUNET_YES;
2410   }
2411 #endif
2412
2413 /**
2414  * Create a blacklist topology based on the allowed topology
2415  * which disallows any connections not in the allowed topology
2416  * at the transport level.
2417  *
2418  * @param pg the peergroup to create the topology on
2419  * @param proc the connection processor to call to allow
2420  *        up connections between two peers
2421  *
2422  * @return the number of connections that were set up
2423  *
2424  */
2425 static unsigned int
2426 copy_allowed(struct GNUNET_TESTING_PeerGroup *pg,
2427              GNUNET_TESTING_ConnectionProcessor proc)
2428 {
2429   struct UnblacklistContext un_ctx;
2430   unsigned int count;
2431   unsigned int total;
2432   struct PeerConnection *iter;
2433
2434   un_ctx.pg = pg;
2435   total = 0;
2436   for (count = 0; count < pg->total - 1; count++)
2437     {
2438       un_ctx.first_uid = count;
2439 #if OLD
2440       iter = pg->peers[count].allowed_peers_head;
2441       while (iter != NULL)
2442         {
2443           remove_connections (pg, count, iter->index, BLACKLIST, GNUNET_YES);
2444           //unblacklist_connections(pg, count, iter->index);
2445           iter = iter->next;
2446         }
2447 #else
2448       total += GNUNET_CONTAINER_multihashmap_iterate(pg->peers[count].allowed_peers, &unblacklist_iterator, &un_ctx);
2449 #endif
2450     }
2451   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Unblacklisted %u peers\n", total);
2452   return total;
2453 }
2454
2455 /**
2456  * Create a topology given a peer group (set of running peers)
2457  * and a connection processor.
2458  *
2459  * @param pg the peergroup to create the topology on
2460  * @param proc the connection processor to call to actually set
2461  *        up connections between two peers
2462  * @param list which list should be modified
2463  *
2464  * @return the number of connections that were set up
2465  *
2466  */
2467 static unsigned int
2468 create_line(struct GNUNET_TESTING_PeerGroup *pg,
2469             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2470 {
2471   unsigned int count;
2472   int connect_attempts;
2473
2474   connect_attempts = 0;
2475
2476   /* Connect each peer to the next highest numbered peer */
2477   for (count = 0; count < pg->total - 1; count++)
2478     {
2479 #if VERBOSE_TESTING
2480       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2481           "Connecting peer %d to peer %d\n", count, count + 1);
2482 #endif
2483       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2484     }
2485
2486   return connect_attempts;
2487 }
2488
2489 /**
2490  * Create a topology given a peer group (set of running peers)
2491  * and a connection processor.
2492  *
2493  * @param pg the peergroup to create the topology on
2494  * @param filename the file to read topology information from
2495  * @param proc the connection processor to call to actually set
2496  *        up connections between two peers
2497  * @param list the peer list to use
2498  *
2499  * @return the number of connections that were set up
2500  *
2501  */
2502 static unsigned int
2503 create_from_file(struct GNUNET_TESTING_PeerGroup *pg, char *filename,
2504                  GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2505 {
2506   int connect_attempts;
2507   unsigned int first_peer_index;
2508   unsigned int second_peer_index;
2509   connect_attempts = 0;
2510   struct stat frstat;
2511   int count;
2512   char *data;
2513   char *buf;
2514   unsigned int total_peers;
2515
2516   enum States curr_state;
2517
2518   if (GNUNET_OK != GNUNET_DISK_file_test (filename))
2519     GNUNET_DISK_fn_write (filename, NULL, 0, GNUNET_DISK_PERM_USER_READ);
2520
2521   if ((0 != STAT (filename, &frstat)) || (frstat.st_size == 0))
2522     {
2523       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2524                   "Could not open file `%s' specified for topology!", filename);
2525       return connect_attempts;
2526     }
2527
2528   data = GNUNET_malloc_large (frstat.st_size);
2529   GNUNET_assert(data != NULL);
2530   if (frstat.st_size != GNUNET_DISK_fn_read (filename, data, frstat.st_size))
2531     {
2532       GNUNET_log (
2533                   GNUNET_ERROR_TYPE_ERROR,
2534                   "Could not read file %s specified for host list, ending test!",
2535                   filename);
2536       GNUNET_free (data);
2537       return connect_attempts;
2538     }
2539
2540   buf = data;
2541   count = 0;
2542   first_peer_index = 0;
2543   /* First line should contain a single integer, specifying the number of peers */
2544   /* Each subsequent line should contain this format PEER_INDEX:OTHER_PEER_INDEX[,...] */
2545   curr_state = NUM_PEERS;
2546   while (count < frstat.st_size - 1)
2547     {
2548       if ((buf[count] == '\n') || (buf[count] == ' '))
2549         {
2550           count++;
2551           continue;
2552         }
2553
2554       switch (curr_state)
2555         {
2556       case NUM_PEERS:
2557         errno = 0;
2558         total_peers = strtoul(&buf[count], NULL, 10);
2559         if (errno != 0)
2560           {
2561             GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2562                         "Failed to read number of peers from topology file!\n");
2563             GNUNET_free_non_null(data);
2564             return connect_attempts;
2565           }
2566         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2567                     "Read %u total peers in topology\n", total_peers);
2568         GNUNET_assert(total_peers == pg->total);
2569         curr_state = PEER_INDEX;
2570         while ((buf[count] != '\n') && (count < frstat.st_size - 1))
2571           count++;
2572         count++;
2573         break;
2574       case PEER_INDEX:
2575         errno = 0;
2576         first_peer_index = strtoul(&buf[count], NULL, 10);
2577         if (errno != 0)
2578           {
2579             GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2580                         "Failed to read peer index from topology file!\n");
2581             GNUNET_free_non_null(data);
2582             return connect_attempts;
2583           }
2584         while ((buf[count] != ':') && (count < frstat.st_size - 1))
2585           count++;
2586         count++;
2587         curr_state = OTHER_PEER_INDEX;
2588         break;
2589       case COLON:
2590         if (1 == sscanf (&buf[count], ":"))
2591           curr_state = OTHER_PEER_INDEX;
2592         count++;
2593         break;
2594       case OTHER_PEER_INDEX:
2595         errno = 0;
2596         second_peer_index = strtoul(&buf[count], NULL, 10);
2597         if (errno != 0)
2598           {
2599             GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2600                         "Failed to peer index from topology file!\n");
2601             GNUNET_free_non_null(data);
2602             return connect_attempts;
2603           }
2604         /* Assume file is written with first peer 1, but array index is 0 */
2605         connect_attempts += proc (pg, first_peer_index - 1, second_peer_index
2606                                   - 1, list, GNUNET_YES);
2607         while ((buf[count] != '\n') && (buf[count] != ',') && (count
2608             < frstat.st_size - 1))
2609           count++;
2610         if (buf[count] == '\n')
2611           {
2612             curr_state = PEER_INDEX;
2613           }
2614         else if (buf[count] != ',')
2615           {
2616             curr_state = OTHER_PEER_INDEX;
2617           }
2618         count++;
2619         break;
2620       default:
2621         GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2622                     "Found bad data in topology file while in state %d!\n",
2623                     curr_state);
2624         GNUNET_break(0);
2625         return connect_attempts;
2626         }
2627
2628     }
2629   return connect_attempts;
2630 }
2631
2632 /**
2633  * Create a topology given a peer group (set of running peers)
2634  * and a connection processor.
2635  *
2636  * @param pg the peergroup to create the topology on
2637  * @param proc the connection processor to call to actually set
2638  *        up connections between two peers
2639  * @param list the peer list to use
2640  *
2641  * @return the number of connections that were set up
2642  *
2643  */
2644 static unsigned int
2645 create_ring(struct GNUNET_TESTING_PeerGroup *pg,
2646             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2647 {
2648   unsigned int count;
2649   int connect_attempts;
2650
2651   connect_attempts = 0;
2652
2653   /* Connect each peer to the next highest numbered peer */
2654   for (count = 0; count < pg->total - 1; count++)
2655     {
2656 #if VERBOSE_TESTING
2657       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2658           "Connecting peer %d to peer %d\n", count, count + 1);
2659 #endif
2660       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2661     }
2662
2663   /* Connect the last peer to the first peer */
2664   connect_attempts += proc (pg, pg->total - 1, 0, list, GNUNET_YES);
2665
2666   return connect_attempts;
2667 }
2668
2669 #if !OLD
2670 /**
2671  * Iterator for writing friends of a peer to a file.
2672  *
2673  * @param cls closure, an open writable file handle
2674  * @param key the key the daemon was stored under
2675  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2676  *
2677  * @return GNUNET_YES to continue iteration
2678  *
2679  * TODO: Could replace friend_file_iterator and blacklist_file_iterator
2680  *       with a single file_iterator that takes a closure which contains
2681  *       the prefix to write before the peer.  Then this could be used
2682  *       for blacklisting multiple transports and writing the friend
2683  *       file.  I'm sure *someone* will complain loudly about other
2684  *       things that negate these functions even existing so no point in
2685  *       "fixing" now.
2686  */
2687 static int
2688 friend_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2689   {
2690     FILE *temp_friend_handle = cls;
2691     struct GNUNET_TESTING_Daemon *peer = value;
2692     struct GNUNET_PeerIdentity *temppeer;
2693     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2694
2695     temppeer = &peer->id;
2696     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2697     fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2698
2699     return GNUNET_YES;
2700   }
2701
2702 struct BlacklistContext
2703   {
2704     /*
2705      * The (open) file handle to write to
2706      */
2707     FILE *temp_file_handle;
2708
2709     /*
2710      * The transport that this peer will be blacklisted on.
2711      */
2712     char *transport;
2713   };
2714
2715 /**
2716  * Iterator for writing blacklist data to appropriate files.
2717  *
2718  * @param cls closure, an open writable file handle
2719  * @param key the key the daemon was stored under
2720  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2721  *
2722  * @return GNUNET_YES to continue iteration
2723  */
2724 static int
2725 blacklist_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2726   {
2727     struct BlacklistContext *blacklist_ctx = cls;
2728     struct GNUNET_TESTING_Daemon *peer = value;
2729     struct GNUNET_PeerIdentity *temppeer;
2730     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2731
2732     temppeer = &peer->id;
2733     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2734     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Writing entry %s:%s to file\n", blacklist_ctx->transport, (char *) &peer_enc);
2735     fprintf (blacklist_ctx->temp_file_handle, "%s:%s\n",
2736         blacklist_ctx->transport, (char *) &peer_enc);
2737
2738     return GNUNET_YES;
2739   }
2740 #endif
2741
2742 /*
2743  * Create the friend files based on the PeerConnection's
2744  * of each peer in the peer group, and copy the files
2745  * to the appropriate place
2746  *
2747  * @param pg the peer group we are dealing with
2748  */
2749 static int
2750 create_and_copy_friend_files(struct GNUNET_TESTING_PeerGroup *pg)
2751 {
2752   FILE *temp_friend_handle;
2753   unsigned int pg_iter;
2754   char *temp_service_path;
2755   struct GNUNET_OS_Process **procarr;
2756   char *arg;
2757   char *mytemp;
2758 #if NOT_STUPID
2759   enum GNUNET_OS_ProcessStatusType type;
2760   unsigned long return_code;
2761   int count;
2762   int max_wait = 10;
2763 #endif
2764   int ret;
2765
2766   ret = GNUNET_OK;
2767 #if OLD
2768   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2769   struct PeerConnection *conn_iter;
2770 #endif
2771   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2772   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2773     {
2774       mytemp = GNUNET_DISK_mktemp ("friends");
2775       GNUNET_assert (mytemp != NULL);
2776       temp_friend_handle = fopen (mytemp, "wt");
2777       GNUNET_assert (temp_friend_handle != NULL);
2778 #if OLD
2779       conn_iter = pg->peers[pg_iter].allowed_peers_head;
2780       while (conn_iter != NULL)
2781         {
2782           GNUNET_CRYPTO_hash_to_enc (
2783                                      &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2784                                      &peer_enc);
2785           fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2786           conn_iter = conn_iter->next;
2787         }
2788 #else
2789       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].allowed_peers,
2790           &friend_file_iterator,
2791           temp_friend_handle);
2792 #endif
2793       fclose (temp_friend_handle);
2794
2795       if (GNUNET_OK
2796           != GNUNET_CONFIGURATION_get_value_string (
2797                                                     pg->peers[pg_iter]. daemon->cfg,
2798                                                     "PATHS", "SERVICEHOME",
2799                                                     &temp_service_path))
2800         {
2801           GNUNET_log (
2802                       GNUNET_ERROR_TYPE_WARNING,
2803                       _
2804                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
2805                       "SERVICEHOME", "PATHS");
2806           if (UNLINK (mytemp) != 0)
2807             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
2808                 mytemp);
2809           GNUNET_free (mytemp);
2810           break;
2811         }
2812
2813       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
2814         {
2815           GNUNET_asprintf (&arg, "%s/friends", temp_service_path);
2816           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
2817                                                       mytemp, arg, NULL);
2818           GNUNET_assert(procarr[pg_iter] != NULL);
2819 #if VERBOSE_TESTING
2820           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2821               _("Copying file with command cp %s %s\n"), mytemp, arg);
2822 #endif
2823           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2824           GNUNET_OS_process_close (procarr[pg_iter]);
2825           GNUNET_free (arg);
2826         }
2827       else /* Remote, scp the file to the correct place */
2828         {
2829           if (NULL != pg->peers[pg_iter].daemon->username)
2830             GNUNET_asprintf (&arg, "%s@%s:%s/friends",
2831                              pg->peers[pg_iter].daemon->username,
2832                              pg->peers[pg_iter].daemon->hostname,
2833                              temp_service_path);
2834           else
2835             GNUNET_asprintf (&arg, "%s:%s/friends",
2836                              pg->peers[pg_iter].daemon->hostname,
2837                              temp_service_path);
2838           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
2839                                                       mytemp, arg, NULL);
2840           GNUNET_assert(procarr[pg_iter] != NULL);
2841           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2842           GNUNET_OS_process_close (procarr[pg_iter]);
2843           if (ret != GNUNET_OK)
2844             return ret;
2845           procarr[pg_iter] = NULL;
2846 #if VERBOSE_TESTING
2847           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2848               _("Copying file with command scp %s %s\n"), mytemp,
2849               arg);
2850 #endif
2851           GNUNET_free (arg);
2852         }
2853       GNUNET_free (temp_service_path);
2854       GNUNET_free (mytemp);
2855     }
2856
2857 #if NOT_STUPID
2858   count = 0;
2859   ret = GNUNET_SYSERR;
2860   while ((count < max_wait) && (ret != GNUNET_OK))
2861     {
2862       ret = GNUNET_OK;
2863       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2864         {
2865 #if VERBOSE_TESTING
2866           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2867               _("Checking copy status of file %d\n"), pg_iter);
2868 #endif
2869           if (procarr[pg_iter] != NULL) /* Check for already completed! */
2870             {
2871               if (GNUNET_OS_process_status
2872                   (procarr[pg_iter], &type, &return_code) != GNUNET_OK)
2873                 {
2874                   ret = GNUNET_SYSERR;
2875                 }
2876               else if ((type != GNUNET_OS_PROCESS_EXITED)
2877                   || (return_code != 0))
2878                 {
2879                   ret = GNUNET_SYSERR;
2880                 }
2881               else
2882                 {
2883                   GNUNET_OS_process_close (procarr[pg_iter]);
2884                   procarr[pg_iter] = NULL;
2885 #if VERBOSE_TESTING
2886                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2887                       _("File %d copied\n"), pg_iter);
2888 #endif
2889                 }
2890             }
2891         }
2892       count++;
2893       if (ret == GNUNET_SYSERR)
2894         {
2895           /* FIXME: why sleep here? -CG */
2896           sleep (1);
2897         }
2898     }
2899
2900 #if VERBOSE_TESTING
2901   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2902       _("Finished copying all friend files!\n"));
2903 #endif
2904 #endif
2905   GNUNET_free (procarr);
2906   return ret;
2907 }
2908
2909 /*
2910  * Create the blacklist files based on the PeerConnection's
2911  * of each peer in the peer group, and copy the files
2912  * to the appropriate place.
2913  *
2914  * @param pg the peer group we are dealing with
2915  * @param transports space delimited list of transports to blacklist
2916  */
2917 static int
2918 create_and_copy_blacklist_files(struct GNUNET_TESTING_PeerGroup *pg,
2919                                 const char *transports)
2920 {
2921   FILE *temp_file_handle;
2922   unsigned int pg_iter;
2923   char *temp_service_path;
2924   struct GNUNET_OS_Process **procarr;
2925   char *arg;
2926   char *mytemp;
2927   enum GNUNET_OS_ProcessStatusType type;
2928   unsigned long return_code;
2929   int count;
2930   int ret;
2931   int max_wait = 10;
2932   int transport_len;
2933   unsigned int i;
2934   char *pos;
2935   char *temp_transports;
2936   int entry_count;
2937 #if OLD
2938   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2939   struct PeerConnection *conn_iter;
2940 #else
2941   static struct BlacklistContext blacklist_ctx;
2942 #endif
2943
2944   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2945   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2946     {
2947       mytemp = GNUNET_DISK_mktemp ("blacklist");
2948       GNUNET_assert (mytemp != NULL);
2949       temp_file_handle = fopen (mytemp, "wt");
2950       GNUNET_assert (temp_file_handle != NULL);
2951       temp_transports = GNUNET_strdup (transports);
2952 #if !OLD
2953       blacklist_ctx.temp_file_handle = temp_file_handle;
2954 #endif
2955       transport_len = strlen (temp_transports) + 1;
2956       pos = NULL;
2957
2958       for (i = 0; i < transport_len; i++)
2959         {
2960           if ((temp_transports[i] == ' ') && (pos == NULL))
2961             continue; /* At start of string (whitespace) */
2962           else if ((temp_transports[i] == ' ') || (temp_transports[i] == '\0')) /* At end of string */
2963             {
2964               temp_transports[i] = '\0';
2965 #if OLD
2966               conn_iter = pg->peers[pg_iter].blacklisted_peers_head;
2967               while (conn_iter != NULL)
2968                 {
2969                   GNUNET_CRYPTO_hash_to_enc (
2970                                              &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2971                                              &peer_enc);
2972                   fprintf (temp_file_handle, "%s:%s\n", pos, (char *) &peer_enc);
2973                   conn_iter = conn_iter->next;
2974                   entry_count++;
2975                 }
2976 #else
2977               blacklist_ctx.transport = pos;
2978               entry_count = GNUNET_CONTAINER_multihashmap_iterate (pg->
2979                   peers
2980                   [pg_iter].blacklisted_peers,
2981                   &blacklist_file_iterator,
2982                   &blacklist_ctx);
2983 #endif
2984               pos = NULL;
2985             } /* At beginning of actual string */
2986           else if (pos == NULL)
2987             {
2988               pos = &temp_transports[i];
2989             }
2990         }
2991
2992       GNUNET_free (temp_transports);
2993       fclose (temp_file_handle);
2994
2995       if (GNUNET_OK
2996           != GNUNET_CONFIGURATION_get_value_string (
2997                                                     pg->peers[pg_iter]. daemon->cfg,
2998                                                     "PATHS", "SERVICEHOME",
2999                                                     &temp_service_path))
3000         {
3001           GNUNET_log (
3002                       GNUNET_ERROR_TYPE_WARNING,
3003                       _
3004                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
3005                       "SERVICEHOME", "PATHS");
3006           if (UNLINK (mytemp) != 0)
3007             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
3008                 mytemp);
3009           GNUNET_free (mytemp);
3010           break;
3011         }
3012
3013       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
3014         {
3015           GNUNET_asprintf (&arg, "%s/blacklist", temp_service_path);
3016           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
3017                                                       mytemp, arg, NULL);
3018 #if VERBOSE_TESTING
3019           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3020               _("Copying file with command cp %s %s\n"), mytemp, arg);
3021 #endif
3022
3023           GNUNET_free (arg);
3024         }
3025       else /* Remote, scp the file to the correct place */
3026         {
3027           if (NULL != pg->peers[pg_iter].daemon->username)
3028             GNUNET_asprintf (&arg, "%s@%s:%s/blacklist",
3029                              pg->peers[pg_iter].daemon->username,
3030                              pg->peers[pg_iter].daemon->hostname,
3031                              temp_service_path);
3032           else
3033             GNUNET_asprintf (&arg, "%s:%s/blacklist",
3034                              pg->peers[pg_iter].daemon->hostname,
3035                              temp_service_path);
3036           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
3037                                                       mytemp, arg, NULL);
3038           GNUNET_assert(procarr[pg_iter] != NULL);
3039           GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: add scheduled blacklist file copy that parallelizes file copying! */
3040
3041 #if VERBOSE_TESTING
3042           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3043               _("Copying file with command scp %s %s\n"), mytemp,
3044               arg);
3045 #endif
3046           GNUNET_free (arg);
3047         }
3048       GNUNET_free (temp_service_path);
3049       GNUNET_free (mytemp);
3050     }
3051
3052   count = 0;
3053   ret = GNUNET_SYSERR;
3054   while ((count < max_wait) && (ret != GNUNET_OK))
3055     {
3056       ret = GNUNET_OK;
3057       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3058         {
3059 #if VERBOSE_TESTING
3060           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3061               _("Checking copy status of file %d\n"), pg_iter);
3062 #endif
3063           if (procarr[pg_iter] != NULL) /* Check for already completed! */
3064             {
3065               if (GNUNET_OS_process_status (procarr[pg_iter], &type,
3066                                             &return_code) != GNUNET_OK)
3067                 {
3068                   ret = GNUNET_SYSERR;
3069                 }
3070               else if ((type != GNUNET_OS_PROCESS_EXITED) || (return_code != 0))
3071                 {
3072                   ret = GNUNET_SYSERR;
3073                 }
3074               else
3075                 {
3076                   GNUNET_OS_process_close (procarr[pg_iter]);
3077                   procarr[pg_iter] = NULL;
3078 #if VERBOSE_TESTING
3079                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3080                       _("File %d copied\n"), pg_iter);
3081 #endif
3082                 }
3083             }
3084         }
3085       count++;
3086       if (ret == GNUNET_SYSERR)
3087         {
3088           /* FIXME: why sleep here? -CG */
3089           sleep (1);
3090         }
3091     }
3092
3093 #if VERBOSE_TESTING
3094   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3095       _("Finished copying all blacklist files!\n"));
3096 #endif
3097   GNUNET_free (procarr);
3098   return ret;
3099 }
3100
3101 /* Forward Declaration */
3102 static void
3103 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3104
3105 /**
3106  * Choose a random peer's next connection to create, and
3107  * call schedule_connect to set up the connect task.
3108  *
3109  * @param ct_ctx the overall connection context
3110  */
3111 static void
3112 preschedule_connect(struct GNUNET_TESTING_PeerGroup *pg)
3113 {
3114   struct ConnectTopologyContext *ct_ctx = &pg->ct_ctx;
3115   struct PeerConnection *connection_iter;
3116   struct ConnectContext *connect_context;
3117   uint32_t random_peer;
3118
3119   if (ct_ctx->remaining_connections == 0)
3120     return;
3121   random_peer
3122       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, pg->total);
3123   while (pg->peers[random_peer].connect_peers_head == NULL)
3124     random_peer = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3125                                             pg->total);
3126
3127   connection_iter = pg->peers[random_peer].connect_peers_head;
3128   connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3129   connect_context->first_index = random_peer;
3130   connect_context->second_index = connection_iter->index;
3131   connect_context->ct_ctx = ct_ctx;
3132   GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3133   GNUNET_CONTAINER_DLL_remove(pg->peers[random_peer].connect_peers_head, pg->peers[random_peer].connect_peers_tail, connection_iter);
3134   GNUNET_free(connection_iter);
3135   ct_ctx->remaining_connections--;
3136 }
3137
3138 #if USE_SEND_HELLOS
3139 /* Forward declaration */
3140 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3141
3142 /**
3143  * Close connections and free the hello context.
3144  *
3145  * @param cls the 'struct SendHelloContext *'
3146  * @param tc scheduler context
3147  */
3148 static void
3149 free_hello_context (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3150   {
3151     struct SendHelloContext *send_hello_context = cls;
3152     if (send_hello_context->peer->daemon->server != NULL)
3153       {
3154         GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3155         send_hello_context->peer->daemon->server = NULL;
3156       }
3157     if (send_hello_context->peer->daemon->th != NULL)
3158       {
3159         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3160         send_hello_context->peer->daemon->th = NULL;
3161       }
3162     if (send_hello_context->core_connect_task != GNUNET_SCHEDULER_NO_TASK)
3163       {
3164         GNUNET_SCHEDULER_cancel(send_hello_context->core_connect_task);
3165         send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3166       }
3167     send_hello_context->pg->outstanding_connects--;
3168     GNUNET_free(send_hello_context);
3169   }
3170
3171 /**
3172  * For peers that haven't yet connected, notify
3173  * the caller that they have failed (timeout).
3174  *
3175  * @param cls the 'struct SendHelloContext *'
3176  * @param tc scheduler context
3177  */
3178 static void
3179 notify_remaining_connections_failed (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3180   {
3181     struct SendHelloContext *send_hello_context = cls;
3182     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3183     struct PeerConnection *connection;
3184
3185     GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3186     send_hello_context->peer->daemon->server = NULL;
3187
3188     connection = send_hello_context->peer->connect_peers_head;
3189
3190     while (connection != NULL)
3191       {
3192         if (pg->notify_connection != NULL)
3193           {
3194             pg->notify_connection(pg->notify_connection_cls,
3195                 &send_hello_context->peer->daemon->id,
3196                 &pg->peers[connection->index].daemon->id,
3197                 0, /* FIXME */
3198                 send_hello_context->peer->daemon->cfg,
3199                 pg->peers[connection->index].daemon->cfg,
3200                 send_hello_context->peer->daemon,
3201                 pg->peers[connection->index].daemon,
3202                 "Peers failed to connect (timeout)");
3203           }
3204         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3205         GNUNET_free(connection);
3206         connection = connection->next;
3207       }
3208     GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3209 #if BAD
3210     other_peer = &pg->peers[connection->index];
3211 #endif
3212   }
3213
3214 /**
3215  * For peers that haven't yet connected, send
3216  * CORE connect requests.
3217  *
3218  * @param cls the 'struct SendHelloContext *'
3219  * @param tc scheduler context
3220  */
3221 static void
3222 send_core_connect_requests (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3223   {
3224     struct SendHelloContext *send_hello_context = cls;
3225     struct PeerConnection *conn;
3226     GNUNET_assert(send_hello_context->peer->daemon->server != NULL);
3227
3228     send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3229
3230     send_hello_context->connect_attempts++;
3231     if (send_hello_context->connect_attempts < send_hello_context->pg->ct_ctx.connect_attempts)
3232       {
3233         conn = send_hello_context->peer->connect_peers_head;
3234         while (conn != NULL)
3235           {
3236             GNUNET_CORE_peer_request_connect(send_hello_context->peer->daemon->server,
3237                 GNUNET_TIME_relative_get_forever(),
3238                 &send_hello_context->pg->peers[conn->index].daemon->id,
3239                 NULL,
3240                 NULL);
3241             conn = conn->next;
3242           }
3243         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) ,
3244             &send_core_connect_requests,
3245             send_hello_context);
3246       }
3247     else
3248       {
3249         GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Timeout before all connections created, marking rest as failed!\n");
3250         GNUNET_SCHEDULER_add_now(&notify_remaining_connections_failed, send_hello_context);
3251       }
3252
3253   }
3254
3255 /**
3256  * Success, connection is up.  Signal client our success.
3257  *
3258  * @param cls our "struct SendHelloContext"
3259  * @param peer identity of the peer that has connected
3260  * @param atsi performance information
3261  *
3262  * FIXME: remove peers from BOTH lists, call notify twice, should
3263  * double the speed of connections as long as the list iteration
3264  * doesn't take too long!
3265  */
3266 static void
3267 core_connect_notify (void *cls,
3268     const struct GNUNET_PeerIdentity *peer,
3269     const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3270   {
3271     struct SendHelloContext *send_hello_context = cls;
3272     struct PeerConnection *connection;
3273     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3274 #if BAD
3275     struct PeerData *other_peer;
3276 #endif
3277 #if DEBUG_TESTING
3278     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3279         "Connected peer %s to peer %s\n",
3280         ctx->d1->shortname, GNUNET_i2s(peer));
3281 #endif
3282
3283     if (0 == memcmp(&send_hello_context->peer->daemon->id, peer, sizeof(struct GNUNET_PeerIdentity)))
3284     return;
3285
3286     connection = send_hello_context->peer->connect_peers_head;
3287 #if BAD
3288     other_peer = NULL;
3289 #endif
3290
3291     while ((connection != NULL) &&
3292         (0 != memcmp(&pg->peers[connection->index].daemon->id, peer, sizeof(struct GNUNET_PeerIdentity))))
3293       {
3294         connection = connection->next;
3295       }
3296
3297     if (connection == NULL)
3298       {
3299         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);
3300       }
3301     else
3302       {
3303 #if BAD
3304         other_peer = &pg->peers[connection->index];
3305 #endif
3306         if (pg->notify_connection != NULL)
3307           {
3308             pg->notify_connection(pg->notify_connection_cls,
3309                 &send_hello_context->peer->daemon->id,
3310                 peer,
3311                 0, /* FIXME */
3312                 send_hello_context->peer->daemon->cfg,
3313                 pg->peers[connection->index].daemon->cfg,
3314                 send_hello_context->peer->daemon,
3315                 pg->peers[connection->index].daemon,
3316                 NULL);
3317           }
3318         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3319         GNUNET_free(connection);
3320       }
3321
3322 #if BAD
3323     /* Notify of reverse connection and remove from other peers list of outstanding */
3324     if (other_peer != NULL)
3325       {
3326         connection = other_peer->connect_peers_head;
3327         while ((connection != NULL) &&
3328             (0 != memcmp(&send_hello_context->peer->daemon->id, &pg->peers[connection->index].daemon->id, sizeof(struct GNUNET_PeerIdentity))))
3329           {
3330             connection = connection->next;
3331           }
3332         if (connection != NULL)
3333           {
3334             if (pg->notify_connection != NULL)
3335               {
3336                 pg->notify_connection(pg->notify_connection_cls,
3337                     peer,
3338                     &send_hello_context->peer->daemon->id,
3339                     0, /* FIXME */
3340                     pg->peers[connection->index].daemon->cfg,
3341                     send_hello_context->peer->daemon->cfg,
3342                     pg->peers[connection->index].daemon,
3343                     send_hello_context->peer->daemon,
3344                     NULL);
3345               }
3346
3347             GNUNET_CONTAINER_DLL_remove(other_peer->connect_peers_head, other_peer->connect_peers_tail, connection);
3348             GNUNET_free(connection);
3349           }
3350       }
3351 #endif
3352
3353     if (send_hello_context->peer->connect_peers_head == NULL)
3354       {
3355         GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3356       }
3357   }
3358
3359 /**
3360  * Notify of a successful connection to the core service.
3361  *
3362  * @param cls a struct SendHelloContext *
3363  * @param server handle to the core service
3364  * @param my_identity the peer identity of this peer
3365  * @param publicKey the public key of the peer
3366  */
3367 void
3368 core_init (void *cls,
3369     struct GNUNET_CORE_Handle * server,
3370     const struct GNUNET_PeerIdentity *
3371     my_identity,
3372     const struct
3373     GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
3374     publicKey)
3375   {
3376     struct SendHelloContext *send_hello_context = cls;
3377     send_hello_context->core_ready = GNUNET_YES;
3378   }
3379
3380 /**
3381  * Function called once a hello has been sent
3382  * to the transport, move on to the next one
3383  * or go away forever.
3384  *
3385  * @param cls the 'struct SendHelloContext *'
3386  * @param tc scheduler context
3387  */
3388 static void
3389 hello_sent_callback (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3390   {
3391     struct SendHelloContext *send_hello_context = cls;
3392     //unsigned int pg_iter;
3393     if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3394       {
3395         GNUNET_free(send_hello_context);
3396         return;
3397       }
3398
3399     send_hello_context->pg->remaining_hellos--;
3400 #if DEBUG_TESTING
3401     GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Sent HELLO, have %d remaining!\n", send_hello_context->pg->remaining_hellos);
3402 #endif
3403     if (send_hello_context->peer_pos == NULL) /* All HELLOs (for this peer!) have been transmitted! */
3404       {
3405 #if DEBUG_TESTING
3406         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "All hellos for this peer sent, disconnecting transport!\n");
3407 #endif
3408         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3409         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3410         send_hello_context->peer->daemon->th = NULL;
3411
3412         /*if (send_hello_context->pg->remaining_hellos == 0)
3413          {
3414          for (pg_iter = 0; pg_iter < send_hello_context->pg->max_outstanding_connections; pg_iter++)
3415          {
3416          preschedule_connect(&send_hello_context->pg->ct_ctx);
3417          }
3418          }
3419          */
3420         GNUNET_assert (send_hello_context->peer->daemon->server == NULL);
3421         send_hello_context->peer->daemon->server = GNUNET_CORE_connect(send_hello_context->peer->cfg,
3422             1,
3423             send_hello_context,
3424             &core_init,
3425             &core_connect_notify,
3426             NULL,
3427             NULL,
3428             NULL, GNUNET_NO,
3429             NULL, GNUNET_NO,
3430             no_handlers);
3431
3432         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),
3433             &send_core_connect_requests,
3434             send_hello_context);
3435       }
3436     else
3437     GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3438   }
3439
3440 /**
3441  * Connect to a peer, give it all the HELLO's of those peers
3442  * we will later ask it to connect to.
3443  *
3444  * @param ct_ctx the overall connection context
3445  */
3446 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3447   {
3448     struct SendHelloContext *send_hello_context = cls;
3449     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3450
3451     if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3452       {
3453         GNUNET_free(send_hello_context);
3454         return;
3455       }
3456
3457     GNUNET_assert(send_hello_context->peer_pos != NULL); /* All of the HELLO sends to be scheduled have been scheduled! */
3458
3459     if (((send_hello_context->peer->daemon->th == NULL) &&
3460             (pg->outstanding_connects > pg->max_outstanding_connections)) ||
3461         (pg->stop_connects == GNUNET_YES))
3462       {
3463 #if VERBOSE_TESTING > 2
3464         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3465             _
3466             ("Delaying connect, we have too many outstanding connections!\n"));
3467 #endif
3468         GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3469             (GNUNET_TIME_UNIT_MILLISECONDS, 100),
3470             &schedule_send_hellos, send_hello_context);
3471       }
3472     else
3473       {
3474 #if VERBOSE_TESTING > 2
3475         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3476             _("Creating connection, outstanding_connections is %d\n"),
3477             outstanding_connects);
3478 #endif
3479         if (send_hello_context->peer->daemon->th == NULL)
3480           {
3481             pg->outstanding_connects++; /* Actual TRANSPORT, CORE connections! */
3482             send_hello_context->peer->daemon->th
3483                 = GNUNET_TRANSPORT_connect (send_hello_context->peer->cfg, NULL,
3484                                             send_hello_context, NULL, NULL, NULL);
3485           }
3486 #if DEBUG_TESTING
3487         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3488             _("Offering Hello of peer %s to peer %s\n"),
3489             send_hello_context->peer->daemon->shortname, pg->peers[send_hello_context->peer_pos->index].daemon->shortname);
3490 #endif
3491         GNUNET_TRANSPORT_offer_hello(send_hello_context->peer->daemon->th,
3492             (const struct GNUNET_MessageHeader *)pg->peers[send_hello_context->peer_pos->index].daemon->hello,
3493             &hello_sent_callback,
3494             send_hello_context);
3495         send_hello_context->peer_pos = send_hello_context->peer_pos->next;
3496         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3497       }
3498   }
3499 #endif
3500
3501 /**
3502  * Internal notification of a connection, kept so that we can ensure some connections
3503  * happen instead of flooding all testing daemons with requests to connect.
3504  */
3505 static void
3506 internal_connect_notify(void *cls, const struct GNUNET_PeerIdentity *first,
3507                         const struct GNUNET_PeerIdentity *second,
3508                         uint32_t distance,
3509                         const struct GNUNET_CONFIGURATION_Handle *first_cfg,
3510                         const struct GNUNET_CONFIGURATION_Handle *second_cfg,
3511                         struct GNUNET_TESTING_Daemon *first_daemon,
3512                         struct GNUNET_TESTING_Daemon *second_daemon,
3513                         const char *emsg)
3514 {
3515   struct ConnectContext *connect_ctx = cls;
3516   struct ConnectTopologyContext *ct_ctx = connect_ctx->ct_ctx;
3517   struct GNUNET_TESTING_PeerGroup *pg = ct_ctx->pg;
3518   struct PeerConnection *connection;
3519   pg->outstanding_connects--;
3520
3521   /*
3522    * Check whether the inverse connection has been scheduled yet,
3523    * if not, we can remove it from the other peers list and avoid
3524    * even trying to connect them again!
3525    */
3526   connection = pg->peers[connect_ctx->second_index].connect_peers_head;
3527 #if BAD
3528   other_peer = NULL;
3529 #endif
3530
3531   while ((connection != NULL) && (0
3532       != memcmp (first, &pg->peers[connection->index].daemon->id,
3533                  sizeof(struct GNUNET_PeerIdentity))))
3534     {
3535       connection = connection->next;
3536     }
3537
3538   if (connection != NULL) /* Can safely remove! */
3539     {
3540       ct_ctx->remaining_connections--;
3541       if (pg->notify_connection != NULL) /* Notify of reverse connection */
3542         pg->notify_connection (pg->notify_connection_cls, second, first,
3543                                distance, second_cfg, first_cfg, second_daemon,
3544                                first_daemon, emsg);
3545
3546       GNUNET_CONTAINER_DLL_remove(pg->peers[connect_ctx->second_index].connect_peers_head, pg->peers[connect_ctx->second_index].connect_peers_tail, connection);
3547       GNUNET_free(connection);
3548     }
3549
3550   if (ct_ctx->remaining_connections == 0)
3551     {
3552       if (ct_ctx->notify_connections_done != NULL)
3553         ct_ctx->notify_connections_done (ct_ctx->notify_cls, NULL);
3554     }
3555   else
3556     preschedule_connect (pg);
3557
3558   if (pg->notify_connection != NULL)
3559     pg->notify_connection (pg->notify_connection_cls, first, second, distance,
3560                            first_cfg, second_cfg, first_daemon, second_daemon,
3561                            emsg);
3562
3563   GNUNET_free(connect_ctx);
3564 }
3565
3566 /**
3567  * Either delay a connection (because there are too many outstanding)
3568  * or schedule it for right now.
3569  *
3570  * @param cls a connection context
3571  * @param tc the task runtime context
3572  */
3573 static void
3574 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3575 {
3576   struct ConnectContext *connect_context = cls;
3577   struct GNUNET_TESTING_PeerGroup *pg = connect_context->ct_ctx->pg;
3578
3579   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3580     return;
3581
3582   if ((pg->outstanding_connects > pg->max_outstanding_connections)
3583       || (pg->stop_connects == GNUNET_YES))
3584     {
3585 #if VERBOSE_TESTING
3586       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3587           _
3588           ("Delaying connect, we have too many outstanding connections!\n"));
3589 #endif
3590       GNUNET_SCHEDULER_add_delayed (
3591                                     GNUNET_TIME_relative_multiply (
3592                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
3593                                                                    100),
3594                                     &schedule_connect, connect_context);
3595     }
3596   else
3597     {
3598 #if VERBOSE_TESTING
3599       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3600           _("Creating connection, outstanding_connections is %d (max %d)\n"),
3601           pg->outstanding_connects, pg->max_outstanding_connections);
3602 #endif
3603       pg->outstanding_connects++;
3604       pg->total_connects_scheduled++;
3605       GNUNET_TESTING_daemons_connect (
3606                                       pg->peers[connect_context->first_index].daemon,
3607                                       pg->peers[connect_context->second_index].daemon,
3608                                       connect_context->ct_ctx->connect_timeout,
3609                                       connect_context->ct_ctx->connect_attempts,
3610 #if USE_SEND_HELLOS
3611                                       GNUNET_NO,
3612 #else
3613                                       GNUNET_YES,
3614 #endif
3615                                       &internal_connect_notify, connect_context); /* FIXME: free connect context! */
3616     }
3617 }
3618
3619 #if !OLD
3620 /**
3621  * Iterator for actually scheduling connections to be created
3622  * between two peers.
3623  *
3624  * @param cls closure, a GNUNET_TESTING_Daemon
3625  * @param key the key the second Daemon was stored under
3626  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3627  *
3628  * @return GNUNET_YES to continue iteration
3629  */
3630 static int
3631 connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3632   {
3633     struct ConnectTopologyContext *ct_ctx = cls;
3634     struct PeerData *first = ct_ctx->first;
3635     struct GNUNET_TESTING_Daemon *second = value;
3636     struct ConnectContext *connect_context;
3637
3638     connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3639     connect_context->first = first->daemon;
3640     connect_context->second = second;
3641     connect_context->ct_ctx = ct_ctx;
3642     GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3643
3644     return GNUNET_YES;
3645   }
3646 #endif
3647
3648 #if !OLD
3649 /**
3650  * Iterator for copying all entries in the allowed hashmap to the
3651  * connect hashmap.
3652  *
3653  * @param cls closure, a GNUNET_TESTING_Daemon
3654  * @param key the key the second Daemon was stored under
3655  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3656  *
3657  * @return GNUNET_YES to continue iteration
3658  */
3659 static int
3660 copy_topology_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3661   {
3662     struct PeerData *first = cls;
3663
3664     GNUNET_assert (GNUNET_OK ==
3665         GNUNET_CONTAINER_multihashmap_put (first->connect_peers, key,
3666             value,
3667             GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
3668
3669     return GNUNET_YES;
3670   }
3671 #endif
3672
3673 /**
3674  * Make the peers to connect the same as those that are allowed to be
3675  * connected.
3676  *
3677  * @param pg the peer group
3678  */
3679 static int
3680 copy_allowed_topology(struct GNUNET_TESTING_PeerGroup *pg)
3681 {
3682   unsigned int pg_iter;
3683   int ret;
3684   int total;
3685 #if OLD
3686   struct PeerConnection *iter;
3687 #endif
3688   total = 0;
3689   ret = 0;
3690   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3691     {
3692 #if OLD
3693       iter = pg->peers[pg_iter].allowed_peers_head;
3694       while (iter != NULL)
3695         {
3696           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3697                       "Creating connection between %d and %d\n", pg_iter,
3698                       iter->index);
3699           total += add_connections (pg, pg_iter, iter->index, CONNECT,
3700                                     GNUNET_YES);
3701           //total += add_actual_connections(pg, pg_iter, iter->index);
3702           iter = iter->next;
3703         }
3704 #else
3705       ret =
3706       GNUNET_CONTAINER_multihashmap_iterate (pg->
3707           peers[pg_iter].allowed_peers,
3708           &copy_topology_iterator,
3709           &pg->peers[pg_iter]);
3710 #endif
3711       if (GNUNET_SYSERR == ret)
3712         return GNUNET_SYSERR;
3713
3714       total = total + ret;
3715     }
3716
3717   return total;
3718 }
3719
3720 /**
3721  * Connect the topology as specified by the PeerConnection's
3722  * of each peer in the peer group
3723  *
3724  * @param pg the peer group we are dealing with
3725  * @param connect_timeout how long try connecting two peers
3726  * @param connect_attempts how many times (max) to attempt
3727  * @param notify_callback callback to notify when finished
3728  * @param notify_cls closure for notify callback
3729  *
3730  * @return the number of connections that will be attempted
3731  */
3732 static int
3733 connect_topology(struct GNUNET_TESTING_PeerGroup *pg,
3734                  struct GNUNET_TIME_Relative connect_timeout,
3735                  unsigned int connect_attempts,
3736                  GNUNET_TESTING_NotifyCompletion notify_callback,
3737                  void *notify_cls)
3738 {
3739   unsigned int pg_iter;
3740   unsigned int total;
3741
3742 #if OLD
3743   struct PeerConnection *connection_iter;
3744 #endif
3745 #if USE_SEND_HELLOS
3746   struct SendHelloContext *send_hello_context;
3747 #endif
3748
3749   total = 0;
3750   pg->ct_ctx.notify_connections_done = notify_callback;
3751   pg->ct_ctx.notify_cls = notify_cls;
3752   pg->ct_ctx.pg = pg;
3753
3754   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3755     {
3756 #if OLD
3757       connection_iter = pg->peers[pg_iter].connect_peers_head;
3758       while (connection_iter != NULL)
3759         {
3760           connection_iter = connection_iter->next;
3761           total++;
3762         }
3763 #else
3764       total +=
3765       GNUNET_CONTAINER_multihashmap_size (pg->peers[pg_iter].connect_peers);
3766 #endif
3767     }
3768
3769   if (total == 0)
3770     return total;
3771
3772   pg->ct_ctx.connect_timeout = connect_timeout;
3773   pg->ct_ctx.connect_attempts = connect_attempts;
3774   pg->ct_ctx.remaining_connections = total;
3775
3776 #if USE_SEND_HELLOS
3777   /* First give all peers the HELLO's of other peers (connect to first peer's transport service, give HELLO's of other peers, continue...) */
3778   pg->remaining_hellos = total;
3779   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3780     {
3781       send_hello_context = GNUNET_malloc(sizeof(struct SendHelloContext));
3782       send_hello_context->peer = &pg->peers[pg_iter];
3783       send_hello_context->peer_pos = pg->peers[pg_iter].connect_peers_head;
3784       send_hello_context->pg = pg;
3785       GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3786     }
3787 #else
3788   for (pg_iter = 0; pg_iter < pg->max_outstanding_connections; pg_iter++)
3789     {
3790       preschedule_connect (pg);
3791     }
3792 #endif
3793   return total;
3794
3795 }
3796
3797 /**
3798  * Takes a peer group and creates a topology based on the
3799  * one specified.  Creates a topology means generates friend
3800  * files for the peers so they can only connect to those allowed
3801  * by the topology.  This will only have an effect once peers
3802  * are started if the FRIENDS_ONLY option is set in the base
3803  * config.  Also takes an optional restrict topology which
3804  * disallows connections based on particular transports
3805  * UNLESS they are specified in the restricted topology.
3806  *
3807  * @param pg the peer group struct representing the running peers
3808  * @param topology which topology to connect the peers in
3809  * @param restrict_topology disallow restrict_transports transport
3810  *                          connections to peers NOT in this topology
3811  *                          use GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
3812  * @param restrict_transports space delimited list of transports to blacklist
3813  *                            to create restricted topology
3814  *
3815  * @return the maximum number of connections were all allowed peers
3816  *         connected to each other
3817  */
3818 unsigned int
3819 GNUNET_TESTING_create_topology(struct GNUNET_TESTING_PeerGroup *pg,
3820                                enum GNUNET_TESTING_Topology topology,
3821                                enum GNUNET_TESTING_Topology restrict_topology,
3822                                const char *restrict_transports)
3823 {
3824   int ret;
3825
3826   unsigned int num_connections;
3827   int unblacklisted_connections;
3828   char *filename;
3829   struct PeerConnection *conn_iter;
3830   struct PeerConnection *temp_conn;
3831   unsigned int off;
3832
3833 #if !OLD
3834   unsigned int i;
3835   for (i = 0; i < pg->total; i++)
3836     {
3837       pg->peers[i].allowed_peers =
3838       GNUNET_CONTAINER_multihashmap_create (100);
3839       pg->peers[i].connect_peers =
3840       GNUNET_CONTAINER_multihashmap_create (100);
3841       pg->peers[i].blacklisted_peers =
3842       GNUNET_CONTAINER_multihashmap_create (100);
3843       pg->peers[i].pg = pg;
3844     }
3845 #endif
3846
3847   switch (topology)
3848     {
3849   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3850 #if VERBOSE_TESTING
3851     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating clique topology\n"));
3852 #endif
3853     num_connections = create_clique (pg, &add_connections, ALLOWED, GNUNET_NO);
3854     break;
3855   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
3856 #if VERBOSE_TESTING
3857     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3858         _("Creating small world (ring) topology\n"));
3859 #endif
3860     num_connections = create_small_world_ring (pg, &add_connections, ALLOWED);
3861     break;
3862   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
3863 #if VERBOSE_TESTING
3864     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3865         _("Creating small world (2d-torus) topology\n"));
3866 #endif
3867     num_connections = create_small_world (pg, &add_connections, ALLOWED);
3868     break;
3869   case GNUNET_TESTING_TOPOLOGY_RING:
3870 #if VERBOSE_TESTING
3871     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring topology\n"));
3872 #endif
3873     num_connections = create_ring (pg, &add_connections, ALLOWED);
3874     break;
3875   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
3876 #if VERBOSE_TESTING
3877     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating 2d torus topology\n"));
3878 #endif
3879     num_connections = create_2d_torus (pg, &add_connections, ALLOWED);
3880     break;
3881   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
3882 #if VERBOSE_TESTING
3883     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3884         _("Creating Erdos-Renyi topology\n"));
3885 #endif
3886     num_connections = create_erdos_renyi (pg, &add_connections, ALLOWED);
3887     break;
3888   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
3889 #if VERBOSE_TESTING
3890     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating InterNAT topology\n"));
3891 #endif
3892     num_connections = create_nated_internet (pg, &add_connections, ALLOWED);
3893     break;
3894   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
3895 #if VERBOSE_TESTING
3896     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3897         _("Creating Scale Free topology\n"));
3898 #endif
3899     num_connections = create_scale_free (pg, &add_connections, ALLOWED);
3900     break;
3901   case GNUNET_TESTING_TOPOLOGY_LINE:
3902 #if VERBOSE_TESTING
3903     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3904         _("Creating straight line topology\n"));
3905 #endif
3906     num_connections = create_line (pg, &add_connections, ALLOWED);
3907     break;
3908   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
3909 #if VERBOSE_TESTING
3910     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3911         _("Creating topology from file!\n"));
3912 #endif
3913     if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "testing",
3914                                                             "topology_file",
3915                                                             &filename))
3916       num_connections = create_from_file (pg, filename, &add_connections,
3917                                           ALLOWED);
3918     else
3919       {
3920         GNUNET_log (
3921                     GNUNET_ERROR_TYPE_WARNING,
3922                     "Missing configuration option TESTING:TOPOLOGY_FILE for creating topology from file!\n");
3923         num_connections = 0;
3924       }
3925     break;
3926   case GNUNET_TESTING_TOPOLOGY_NONE:
3927 #if VERBOSE_TESTING
3928     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3929         _
3930         ("Creating no allowed topology (all peers can connect at core level)\n"));
3931 #endif
3932     num_connections = pg->total * pg->total; /* Clique is allowed! */
3933     break;
3934   default:
3935     num_connections = 0;
3936     break;
3937     }
3938
3939   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "TESTING",
3940                                                           "F2F"))
3941     {
3942       ret = create_and_copy_friend_files (pg);
3943       if (ret != GNUNET_OK)
3944         {
3945 #if VERBOSE_TESTING
3946           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3947               _("Failed during friend file copying!\n"));
3948 #endif
3949           return GNUNET_SYSERR;
3950         }
3951       else
3952         {
3953 #if VERBOSE_TESTING
3954           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3955               _("Friend files created/copied successfully!\n"));
3956 #endif
3957         }
3958     }
3959
3960   /* Use the create clique method to initially set all connections as blacklisted. */
3961   if ((restrict_topology != GNUNET_TESTING_TOPOLOGY_NONE) && (restrict_topology
3962       != GNUNET_TESTING_TOPOLOGY_FROM_FILE))
3963     create_clique (pg, &add_connections, BLACKLIST, GNUNET_NO);
3964   else
3965     return num_connections;
3966
3967   unblacklisted_connections = 0;
3968   /* Un-blacklist connections as per the topology specified */
3969   switch (restrict_topology)
3970     {
3971   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3972 #if VERBOSE_TESTING
3973     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3974         _("Blacklisting all but clique topology\n"));
3975 #endif
3976     unblacklisted_connections = create_clique (pg, &remove_connections,
3977                                                BLACKLIST, GNUNET_NO);
3978     break;
3979   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
3980 #if VERBOSE_TESTING
3981     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3982         _("Blacklisting all but small world (ring) topology\n"));
3983 #endif
3984     unblacklisted_connections = create_small_world_ring (pg,
3985                                                          &remove_connections,
3986                                                          BLACKLIST);
3987     break;
3988   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
3989 #if VERBOSE_TESTING
3990     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3991         _
3992         ("Blacklisting all but small world (2d-torus) topology\n"));
3993 #endif
3994     unblacklisted_connections = create_small_world (pg, &remove_connections,
3995                                                     BLACKLIST);
3996     break;
3997   case GNUNET_TESTING_TOPOLOGY_RING:
3998 #if VERBOSE_TESTING
3999     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4000         _("Blacklisting all but ring topology\n"));
4001 #endif
4002     unblacklisted_connections
4003         = create_ring (pg, &remove_connections, BLACKLIST);
4004     break;
4005   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
4006 #if VERBOSE_TESTING
4007     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4008         _("Blacklisting all but 2d torus topology\n"));
4009 #endif
4010     unblacklisted_connections = create_2d_torus (pg, &remove_connections,
4011                                                  BLACKLIST);
4012     break;
4013   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
4014 #if VERBOSE_TESTING
4015     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4016         _("Blacklisting all but Erdos-Renyi topology\n"));
4017 #endif
4018     unblacklisted_connections = create_erdos_renyi (pg, &remove_connections,
4019                                                     BLACKLIST);
4020     break;
4021   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
4022 #if VERBOSE_TESTING
4023     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4024         _("Blacklisting all but InterNAT topology\n"));
4025 #endif
4026
4027 #if TOPOLOGY_HACK
4028     for (off = 0; off < pg->total; off++)
4029       {
4030         conn_iter = pg->peers[off].allowed_peers_head;
4031         while (conn_iter != NULL)
4032           {
4033             temp_conn = conn_iter->next;
4034             GNUNET_free(conn_iter);
4035             conn_iter = temp_conn;
4036           }
4037         pg->peers[off].allowed_peers_head = NULL;
4038         pg->peers[off].allowed_peers_tail = NULL;
4039
4040         conn_iter = pg->peers[off].connect_peers_head;
4041         while (conn_iter != NULL)
4042           {
4043             temp_conn = conn_iter->next;
4044             GNUNET_free(conn_iter);
4045             conn_iter = temp_conn;
4046           }
4047         pg->peers[off].connect_peers_head = NULL;
4048         pg->peers[off].connect_peers_tail = NULL;
4049       }
4050     unblacklisted_connections
4051         = create_nated_internet_copy (pg, &remove_connections, BLACKLIST);
4052 #else
4053     unblacklisted_connections =
4054     create_nated_internet (pg, &remove_connections, BLACKLIST);
4055 #endif
4056
4057     break;
4058   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
4059 #if VERBOSE_TESTING
4060     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4061         _("Blacklisting all but Scale Free topology\n"));
4062 #endif
4063     unblacklisted_connections = create_scale_free (pg, &remove_connections,
4064                                                    BLACKLIST);
4065     break;
4066   case GNUNET_TESTING_TOPOLOGY_LINE:
4067 #if VERBOSE_TESTING
4068     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4069         _("Blacklisting all but straight line topology\n"));
4070 #endif
4071     unblacklisted_connections
4072         = create_line (pg, &remove_connections, BLACKLIST);
4073     break;
4074   case GNUNET_TESTING_TOPOLOGY_NONE: /* Fall through */
4075   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
4076 #if VERBOSE_TESTING
4077     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4078         _
4079         ("Creating no blacklist topology (all peers can connect at transport level)\n"));
4080 #endif
4081     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
4082     ("Creating blacklist topology from allowed\n"));
4083     unblacklisted_connections = copy_allowed (pg, &remove_connections);
4084   default:
4085     break;
4086     }
4087
4088   if ((unblacklisted_connections > 0) && (restrict_transports != NULL))
4089     {
4090       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Creating blacklist with `%s'\n",
4091                   restrict_transports);
4092       ret = create_and_copy_blacklist_files (pg, restrict_transports);
4093       if (ret != GNUNET_OK)
4094         {
4095 #if VERBOSE_TESTING
4096           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4097               _("Failed during blacklist file copying!\n"));
4098 #endif
4099           return 0;
4100         }
4101       else
4102         {
4103 #if VERBOSE_TESTING
4104           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4105               _("Blacklist files created/copied successfully!\n"));
4106 #endif
4107         }
4108     }
4109   return num_connections;
4110 }
4111
4112 #if !OLD
4113 /**
4114  * Iterator for choosing random peers to connect.
4115  *
4116  * @param cls closure, a RandomContext
4117  * @param key the key the second Daemon was stored under
4118  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4119  *
4120  * @return GNUNET_YES to continue iteration
4121  */
4122 static int
4123 random_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4124   {
4125     struct RandomContext *random_ctx = cls;
4126     double random_number;
4127     uint32_t second_pos;
4128     GNUNET_HashCode first_hash;
4129     random_number =
4130     ((double)
4131         GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4132             UINT64_MAX)) / ((double) UINT64_MAX);
4133     if (random_number < random_ctx->percentage)
4134       {
4135         GNUNET_assert (GNUNET_OK ==
4136             GNUNET_CONTAINER_multihashmap_put (random_ctx->
4137                 first->connect_peers_working_set,
4138                 key, value,
4139                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4140       }
4141
4142     /* Now we have considered this particular connection, remove it from the second peer so it's not double counted */
4143     uid_from_hash (key, &second_pos);
4144     hash_from_uid (random_ctx->first_uid, &first_hash);
4145     GNUNET_assert (random_ctx->pg->total > second_pos);
4146     GNUNET_assert (GNUNET_YES ==
4147         GNUNET_CONTAINER_multihashmap_remove (random_ctx->
4148             pg->peers
4149             [second_pos].connect_peers,
4150             &first_hash,
4151             random_ctx->
4152             first->daemon));
4153
4154     return GNUNET_YES;
4155   }
4156
4157 /**
4158  * Iterator for adding at least X peers to a peers connection set.
4159  *
4160  * @param cls closure, MinimumContext
4161  * @param key the key the second Daemon was stored under
4162  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4163  *
4164  * @return GNUNET_YES to continue iteration
4165  */
4166 static int
4167 minimum_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4168   {
4169     struct MinimumContext *min_ctx = cls;
4170     uint32_t second_pos;
4171     GNUNET_HashCode first_hash;
4172     unsigned int i;
4173
4174     if (GNUNET_CONTAINER_multihashmap_size
4175         (min_ctx->first->connect_peers_working_set) < min_ctx->num_to_add)
4176       {
4177         for (i = 0; i < min_ctx->num_to_add; i++)
4178           {
4179             if (min_ctx->pg_array[i] == min_ctx->current)
4180               {
4181                 GNUNET_assert (GNUNET_OK ==
4182                     GNUNET_CONTAINER_multihashmap_put
4183                     (min_ctx->first->connect_peers_working_set, key,
4184                         value,
4185                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4186                 uid_from_hash (key, &second_pos);
4187                 hash_from_uid (min_ctx->first_uid, &first_hash);
4188                 GNUNET_assert (min_ctx->pg->total > second_pos);
4189                 GNUNET_assert (GNUNET_OK ==
4190                     GNUNET_CONTAINER_multihashmap_put (min_ctx->
4191                         pg->peers
4192                         [second_pos].connect_peers_working_set,
4193                         &first_hash,
4194                         min_ctx->first->
4195                         daemon,
4196                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4197                 /* Now we have added this particular connection, remove it from the second peer's map so it's not double counted */
4198                 GNUNET_assert (GNUNET_YES ==
4199                     GNUNET_CONTAINER_multihashmap_remove
4200                     (min_ctx->pg->peers[second_pos].connect_peers,
4201                         &first_hash, min_ctx->first->daemon));
4202               }
4203           }
4204         min_ctx->current++;
4205         return GNUNET_YES;
4206       }
4207     else
4208     return GNUNET_NO; /* We can stop iterating, we have enough peers! */
4209
4210   }
4211
4212 /**
4213  * Iterator for adding peers to a connection set based on a depth first search.
4214  *
4215  * @param cls closure, MinimumContext
4216  * @param key the key the second daemon was stored under
4217  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4218  *
4219  * @return GNUNET_YES to continue iteration
4220  */
4221 static int
4222 dfs_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4223   {
4224     struct DFSContext *dfs_ctx = cls;
4225     GNUNET_HashCode first_hash;
4226
4227     if (dfs_ctx->current == dfs_ctx->chosen)
4228       {
4229         GNUNET_assert (GNUNET_OK ==
4230             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4231                 first->connect_peers_working_set,
4232                 key, value,
4233                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4234         uid_from_hash (key, &dfs_ctx->second_uid);
4235         hash_from_uid (dfs_ctx->first_uid, &first_hash);
4236         GNUNET_assert (GNUNET_OK ==
4237             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4238                 pg->peers
4239                 [dfs_ctx->second_uid].connect_peers_working_set,
4240                 &first_hash,
4241                 dfs_ctx->
4242                 first->daemon,
4243                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4244         GNUNET_assert (GNUNET_YES ==
4245             GNUNET_CONTAINER_multihashmap_remove (dfs_ctx->
4246                 pg->peers
4247                 [dfs_ctx->second_uid].connect_peers,
4248                 &first_hash,
4249                 dfs_ctx->
4250                 first->daemon));
4251         /* Can't remove second from first yet because we are currently iterating, hence the return value in the DFSContext! */
4252         return GNUNET_NO; /* We have found our peer, don't iterate more */
4253       }
4254
4255     dfs_ctx->current++;
4256     return GNUNET_YES;
4257   }
4258 #endif
4259
4260 /**
4261  * From the set of connections possible, choose percentage percent of connections
4262  * to actually connect.
4263  *
4264  * @param pg the peergroup we are dealing with
4265  * @param percentage what percent of total connections to make
4266  */
4267 void
4268 choose_random_connections(struct GNUNET_TESTING_PeerGroup *pg,
4269                           double percentage)
4270 {
4271   struct RandomContext random_ctx;
4272   uint32_t pg_iter;
4273 #if OLD
4274   struct PeerConnection *temp_peers;
4275   struct PeerConnection *conn_iter;
4276   double random_number;
4277 #endif
4278
4279   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4280     {
4281       random_ctx.first_uid = pg_iter;
4282       random_ctx.first = &pg->peers[pg_iter];
4283       random_ctx.percentage = percentage;
4284       random_ctx.pg = pg;
4285 #if OLD
4286       temp_peers = NULL;
4287       conn_iter = pg->peers[pg_iter].connect_peers_head;
4288       while (conn_iter != NULL)
4289         {
4290           random_number
4291               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4292                                                     UINT64_MAX))
4293                   / ((double) UINT64_MAX);
4294           if (random_number < percentage)
4295             {
4296               add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4297                                GNUNET_YES);
4298             }
4299           conn_iter = conn_iter->next;
4300         }
4301 #else
4302       pg->peers[pg_iter].connect_peers_working_set =
4303       GNUNET_CONTAINER_multihashmap_create (pg->total);
4304       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4305           &random_connect_iterator,
4306           &random_ctx);
4307       /* Now remove the old connections */
4308       GNUNET_CONTAINER_multihashmap_destroy (pg->
4309           peers[pg_iter].connect_peers);
4310       /* And replace with the random set */
4311       pg->peers[pg_iter].connect_peers =
4312       pg->peers[pg_iter].connect_peers_working_set;
4313 #endif
4314     }
4315
4316   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4317     {
4318       conn_iter = pg->peers[pg_iter].connect_peers_head;
4319       while (pg->peers[pg_iter].connect_peers_head != NULL)
4320         remove_connections (pg, pg_iter,
4321                             pg->peers[pg_iter].connect_peers_head->index,
4322                             CONNECT, GNUNET_YES);
4323
4324       pg->peers[pg_iter].connect_peers_head
4325           = pg->peers[pg_iter].connect_peers_working_set_head;
4326       pg->peers[pg_iter].connect_peers_tail
4327           = pg->peers[pg_iter].connect_peers_working_set_tail;
4328       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4329       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4330     }
4331 }
4332
4333 /**
4334  * Count the number of connections in a linked list of connections.
4335  *
4336  * @param conn_list the connection list to get the count of
4337  *
4338  * @return the number of elements in the list
4339  */
4340 static unsigned int
4341 count_connections(struct PeerConnection *conn_list)
4342 {
4343   struct PeerConnection *iter;
4344   unsigned int count;
4345   count = 0;
4346   iter = conn_list;
4347   while (iter != NULL)
4348     {
4349       iter = iter->next;
4350       count++;
4351     }
4352   return count;
4353 }
4354
4355 static unsigned int
4356 count_workingset_connections(struct GNUNET_TESTING_PeerGroup *pg)
4357 {
4358   unsigned int count;
4359   unsigned int pg_iter;
4360 #if OLD
4361   struct PeerConnection *conn_iter;
4362 #endif
4363   count = 0;
4364
4365   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4366     {
4367 #if OLD
4368       conn_iter = pg->peers[pg_iter].connect_peers_working_set_head;
4369       while (conn_iter != NULL)
4370         {
4371           count++;
4372           conn_iter = conn_iter->next;
4373         }
4374 #else
4375       count +=
4376       GNUNET_CONTAINER_multihashmap_size (pg->
4377           peers
4378           [pg_iter].connect_peers_working_set);
4379 #endif
4380     }
4381
4382   return count;
4383 }
4384
4385 static unsigned int
4386 count_allowed_connections(struct GNUNET_TESTING_PeerGroup *pg)
4387 {
4388   unsigned int count;
4389   unsigned int pg_iter;
4390 #if OLD
4391   struct PeerConnection *conn_iter;
4392 #endif
4393
4394   count = 0;
4395   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4396     {
4397 #if OLD
4398       conn_iter = pg->peers[pg_iter].allowed_peers_head;
4399       while (conn_iter != NULL)
4400         {
4401           count++;
4402           conn_iter = conn_iter->next;
4403         }
4404 #else
4405       count +=
4406       GNUNET_CONTAINER_multihashmap_size (pg->
4407           peers
4408           [pg_iter].allowed_peers);
4409 #endif
4410     }
4411
4412   return count;
4413 }
4414
4415 /**
4416  * From the set of connections possible, choose at least num connections per
4417  * peer.
4418  *
4419  * @param pg the peergroup we are dealing with
4420  * @param num how many connections at least should each peer have (if possible)?
4421  */
4422 static void
4423 choose_minimum(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4424 {
4425 #if !OLD
4426   struct MinimumContext minimum_ctx;
4427 #else
4428   struct PeerConnection *conn_iter;
4429   unsigned int temp_list_size;
4430   unsigned int i;
4431   unsigned int count;
4432   uint32_t random; /* Random list entry to connect peer to */
4433 #endif
4434   uint32_t pg_iter;
4435
4436 #if OLD
4437   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4438     {
4439       temp_list_size
4440           = count_connections (pg->peers[pg_iter].connect_peers_head);
4441       if (temp_list_size == 0)
4442         {
4443           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4444                       "Peer %d has 0 connections!?!?\n", pg_iter);
4445           break;
4446         }
4447       for (i = 0; i < num; i++)
4448         {
4449           random = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4450                                              temp_list_size);
4451           conn_iter = pg->peers[pg_iter].connect_peers_head;
4452           for (count = 0; count < random; count++)
4453             conn_iter = conn_iter->next;
4454           /* We now have a random connection, connect it! */
4455           GNUNET_assert(conn_iter != NULL);
4456           add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4457                            GNUNET_YES);
4458         }
4459     }
4460 #else
4461   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4462     {
4463       pg->peers[pg_iter].connect_peers_working_set =
4464       GNUNET_CONTAINER_multihashmap_create (num);
4465     }
4466
4467   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4468     {
4469       minimum_ctx.first_uid = pg_iter;
4470       minimum_ctx.pg_array =
4471       GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
4472           GNUNET_CONTAINER_multihashmap_size
4473           (pg->peers[pg_iter].connect_peers));
4474       minimum_ctx.first = &pg->peers[pg_iter];
4475       minimum_ctx.pg = pg;
4476       minimum_ctx.num_to_add = num;
4477       minimum_ctx.current = 0;
4478       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4479           &minimum_connect_iterator,
4480           &minimum_ctx);
4481     }
4482
4483   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4484     {
4485       /* Remove the "old" connections */
4486       GNUNET_CONTAINER_multihashmap_destroy (pg->
4487           peers[pg_iter].connect_peers);
4488       /* And replace with the working set */
4489       pg->peers[pg_iter].connect_peers =
4490       pg->peers[pg_iter].connect_peers_working_set;
4491     }
4492 #endif
4493   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4494     {
4495       while (pg->peers[pg_iter].connect_peers_head != NULL)
4496         {
4497           conn_iter = pg->peers[pg_iter].connect_peers_head;
4498           GNUNET_CONTAINER_DLL_remove(pg->peers[pg_iter].connect_peers_head,
4499               pg->peers[pg_iter].connect_peers_tail,
4500               conn_iter);
4501           GNUNET_free(conn_iter);
4502           /*remove_connections(pg, pg_iter, pg->peers[pg_iter].connect_peers_head->index, CONNECT, GNUNET_YES);*/
4503         }
4504
4505       pg->peers[pg_iter].connect_peers_head
4506           = pg->peers[pg_iter].connect_peers_working_set_head;
4507       pg->peers[pg_iter].connect_peers_tail
4508           = pg->peers[pg_iter].connect_peers_working_set_tail;
4509       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4510       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4511     }
4512 }
4513
4514 #if !OLD
4515 struct FindClosestContext
4516   {
4517     /**
4518      * The currently known closest peer.
4519      */
4520     struct GNUNET_TESTING_Daemon *closest;
4521
4522     /**
4523      * The info for the peer we are adding connections for.
4524      */
4525     struct PeerData *curr_peer;
4526
4527     /**
4528      * The distance (bits) between the current
4529      * peer and the currently known closest.
4530      */
4531     unsigned int closest_dist;
4532
4533     /**
4534      * The offset of the closest known peer in
4535      * the peer group.
4536      */
4537     unsigned int closest_num;
4538   };
4539
4540 /**
4541  * Iterator over hash map entries of the allowed
4542  * peer connections.  Find the closest, not already
4543  * connected peer and return it.
4544  *
4545  * @param cls closure (struct FindClosestContext)
4546  * @param key current key code (hash of offset in pg)
4547  * @param value value in the hash map - a GNUNET_TESTING_Daemon
4548  * @return GNUNET_YES if we should continue to
4549  *         iterate,
4550  *         GNUNET_NO if not.
4551  */
4552 static int
4553 find_closest_peers (void *cls, const GNUNET_HashCode * key, void *value)
4554   {
4555     struct FindClosestContext *closest_ctx = cls;
4556     struct GNUNET_TESTING_Daemon *daemon = value;
4557
4558     if (((closest_ctx->closest == NULL) ||
4559             (GNUNET_CRYPTO_hash_matching_bits
4560                 (&daemon->id.hashPubKey,
4561                     &closest_ctx->curr_peer->daemon->id.hashPubKey) >
4562                 closest_ctx->closest_dist))
4563         && (GNUNET_YES !=
4564             GNUNET_CONTAINER_multihashmap_contains (closest_ctx->
4565                 curr_peer->connect_peers,
4566                 key)))
4567       {
4568         closest_ctx->closest_dist =
4569         GNUNET_CRYPTO_hash_matching_bits (&daemon->id.hashPubKey,
4570             &closest_ctx->curr_peer->daemon->
4571             id.hashPubKey);
4572         closest_ctx->closest = daemon;
4573         uid_from_hash (key, &closest_ctx->closest_num);
4574       }
4575     return GNUNET_YES;
4576   }
4577
4578 /**
4579  * From the set of connections possible, choose at num connections per
4580  * peer based on depth which are closest out of those allowed.  Guaranteed
4581  * to add num peers to connect to, provided there are that many peers
4582  * in the underlay topology to connect to.
4583  *
4584  * @param pg the peergroup we are dealing with
4585  * @param num how many connections at least should each peer have (if possible)?
4586  * @param proc processor to actually add the connections
4587  * @param list the peer list to use
4588  */
4589 void
4590 add_closest (struct GNUNET_TESTING_PeerGroup *pg, unsigned int num,
4591     GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
4592   {
4593 #if OLD
4594
4595 #else
4596     struct FindClosestContext closest_ctx;
4597 #endif
4598     uint32_t pg_iter;
4599     uint32_t i;
4600
4601     for (i = 0; i < num; i++) /* Each time find a closest peer (from those available) */
4602       {
4603         for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4604           {
4605             closest_ctx.curr_peer = &pg->peers[pg_iter];
4606             closest_ctx.closest = NULL;
4607             closest_ctx.closest_dist = 0;
4608             closest_ctx.closest_num = 0;
4609             GNUNET_CONTAINER_multihashmap_iterate (pg->
4610                 peers[pg_iter].allowed_peers,
4611                 &find_closest_peers,
4612                 &closest_ctx);
4613             if (closest_ctx.closest != NULL)
4614               {
4615                 GNUNET_assert (closest_ctx.closest_num < pg->total);
4616                 proc (pg, pg_iter, closest_ctx.closest_num, list);
4617               }
4618           }
4619       }
4620   }
4621 #endif
4622
4623 /**
4624  * From the set of connections possible, choose at least num connections per
4625  * peer based on depth first traversal of peer connections.  If DFS leaves
4626  * peers unconnected, ensure those peers get connections.
4627  *
4628  * @param pg the peergroup we are dealing with
4629  * @param num how many connections at least should each peer have (if possible)?
4630  */
4631 void
4632 perform_dfs(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4633 {
4634   uint32_t pg_iter;
4635   uint32_t dfs_count;
4636   uint32_t starting_peer;
4637   uint32_t least_connections;
4638   uint32_t random_connection;
4639 #if OLD
4640   unsigned int temp_count;
4641   struct PeerConnection *peer_iter;
4642 #else
4643   struct DFSContext dfs_ctx;
4644   GNUNET_HashCode second_hash;
4645 #endif
4646
4647 #if OLD
4648   starting_peer = 0;
4649   dfs_count = 0;
4650   while ((count_workingset_connections (pg) < num * pg->total)
4651       && (count_allowed_connections (pg) > 0))
4652     {
4653       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4654         {
4655           least_connections = -1; /* Set to very high number */
4656           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4657             {
4658               temp_count
4659                   = count_connections (
4660                                        pg->peers[pg_iter].connect_peers_working_set_head);
4661               if (temp_count < least_connections)
4662                 {
4663                   starting_peer = pg_iter;
4664                   least_connections = temp_count;
4665                 }
4666             }
4667         }
4668
4669       temp_count
4670           = count_connections (pg->peers[starting_peer].connect_peers_head);
4671       if (temp_count == 0)
4672         continue; /* FIXME: infinite loop? */
4673
4674       random_connection = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4675                                                     temp_count);
4676       temp_count = 0;
4677       peer_iter = pg->peers[starting_peer].connect_peers_head;
4678       while (temp_count < random_connection)
4679         {
4680           peer_iter = peer_iter->next;
4681           temp_count++;
4682         }
4683       GNUNET_assert(peer_iter != NULL);
4684       add_connections (pg, starting_peer, peer_iter->index, WORKING_SET,
4685                        GNUNET_NO);
4686       remove_connections (pg, starting_peer, peer_iter->index, CONNECT,
4687                           GNUNET_YES);
4688       starting_peer = peer_iter->index;
4689       dfs_count++;
4690     }
4691
4692 #else
4693   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4694     {
4695       pg->peers[pg_iter].connect_peers_working_set =
4696       GNUNET_CONTAINER_multihashmap_create (num);
4697     }
4698
4699   starting_peer = 0;
4700   dfs_count = 0;
4701   while ((count_workingset_connections (pg) < num * pg->total)
4702       && (count_allowed_connections (pg) > 0))
4703     {
4704       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4705         {
4706           least_connections = -1; /* Set to very high number */
4707           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4708             {
4709               if (GNUNET_CONTAINER_multihashmap_size
4710                   (pg->peers[pg_iter].connect_peers_working_set) <
4711                   least_connections)
4712                 {
4713                   starting_peer = pg_iter;
4714                   least_connections =
4715                   GNUNET_CONTAINER_multihashmap_size (pg->
4716                       peers
4717                       [pg_iter].connect_peers_working_set);
4718                 }
4719             }
4720         }
4721
4722       if (GNUNET_CONTAINER_multihashmap_size (pg->peers[starting_peer].connect_peers) == 0) /* Ensure there is at least one peer left to connect! */
4723         {
4724           dfs_count = 0;
4725           continue;
4726         }
4727
4728       /* Choose a random peer from the chosen peers set of connections to add */
4729       dfs_ctx.chosen =
4730       GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4731           GNUNET_CONTAINER_multihashmap_size
4732           (pg->peers[starting_peer].connect_peers));
4733       dfs_ctx.first_uid = starting_peer;
4734       dfs_ctx.first = &pg->peers[starting_peer];
4735       dfs_ctx.pg = pg;
4736       dfs_ctx.current = 0;
4737
4738       GNUNET_CONTAINER_multihashmap_iterate (pg->
4739           peers
4740           [starting_peer].connect_peers,
4741           &dfs_connect_iterator, &dfs_ctx);
4742       /* Remove the second from the first, since we will be continuing the search and may encounter the first peer again! */
4743       hash_from_uid (dfs_ctx.second_uid, &second_hash);
4744       GNUNET_assert (GNUNET_YES ==
4745           GNUNET_CONTAINER_multihashmap_remove (pg->peers
4746               [starting_peer].connect_peers,
4747               &second_hash,
4748               pg->
4749               peers
4750               [dfs_ctx.second_uid].daemon));
4751       starting_peer = dfs_ctx.second_uid;
4752     }
4753
4754   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4755     {
4756       /* Remove the "old" connections */
4757       GNUNET_CONTAINER_multihashmap_destroy (pg->
4758           peers[pg_iter].connect_peers);
4759       /* And replace with the working set */
4760       pg->peers[pg_iter].connect_peers =
4761       pg->peers[pg_iter].connect_peers_working_set;
4762     }
4763 #endif
4764 }
4765
4766 /**
4767  * Internal callback for topology information for a particular peer.
4768  */
4769 static void
4770 internal_topology_callback(void *cls, const struct GNUNET_PeerIdentity *peer,
4771                            const struct GNUNET_TRANSPORT_ATS_Information *atsi)
4772 {
4773   struct CoreContext *core_ctx = cls;
4774   struct TopologyIterateContext *iter_ctx = core_ctx->iter_context;
4775
4776   if (peer == NULL) /* Either finished, or something went wrong */
4777     {
4778       iter_ctx->completed++;
4779       iter_ctx->connected--;
4780       /* One core context allocated per iteration, must free! */
4781       GNUNET_free (core_ctx);
4782     }
4783   else
4784     {
4785       iter_ctx->topology_cb (iter_ctx->cls, &core_ctx->daemon->id, peer, NULL);
4786     }
4787
4788   if (iter_ctx->completed == iter_ctx->total)
4789     {
4790       iter_ctx->topology_cb (iter_ctx->cls, NULL, NULL, NULL);
4791       /* Once all are done, free the iteration context */
4792       GNUNET_free (iter_ctx);
4793     }
4794 }
4795
4796 /**
4797  * Check running topology iteration tasks, if below max start a new one, otherwise
4798  * schedule for some time in the future.
4799  */
4800 static void
4801 schedule_get_topology(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4802 {
4803   struct CoreContext *core_context = cls;
4804   struct TopologyIterateContext *topology_context =
4805       (struct TopologyIterateContext *) core_context->iter_context;
4806   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
4807     return;
4808
4809   if (topology_context->connected
4810       > topology_context->pg->max_outstanding_connections)
4811     {
4812 #if VERBOSE_TESTING > 2
4813       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4814           _
4815           ("Delaying connect, we have too many outstanding connections!\n"));
4816 #endif
4817       GNUNET_SCHEDULER_add_delayed (
4818                                     GNUNET_TIME_relative_multiply (
4819                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4820                                                                    100),
4821                                     &schedule_get_topology, core_context);
4822     }
4823   else
4824     {
4825 #if VERBOSE_TESTING > 2
4826       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4827           _("Creating connection, outstanding_connections is %d\n"),
4828           outstanding_connects);
4829 #endif
4830       topology_context->connected++;
4831
4832       if (GNUNET_OK != GNUNET_CORE_iterate_peers (core_context->daemon->cfg,
4833                                                   &internal_topology_callback,
4834                                                   core_context))
4835         {
4836           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Topology iteration failed.\n");
4837           internal_topology_callback (core_context, NULL, NULL);
4838         }
4839     }
4840 }
4841
4842 /**
4843  * Iterate over all (running) peers in the peer group, retrieve
4844  * all connections that each currently has.
4845  */
4846 void
4847 GNUNET_TESTING_get_topology(struct GNUNET_TESTING_PeerGroup *pg,
4848                             GNUNET_TESTING_NotifyTopology cb, void *cls)
4849 {
4850   struct TopologyIterateContext *topology_context;
4851   struct CoreContext *core_ctx;
4852   unsigned int i;
4853   unsigned int total_count;
4854
4855   /* Allocate a single topology iteration context */
4856   topology_context = GNUNET_malloc (sizeof (struct TopologyIterateContext));
4857   topology_context->topology_cb = cb;
4858   topology_context->cls = cls;
4859   topology_context->pg = pg;
4860   total_count = 0;
4861   for (i = 0; i < pg->total; i++)
4862     {
4863       if (pg->peers[i].daemon->running == GNUNET_YES)
4864         {
4865           /* Allocate one core context per core we need to connect to */
4866           core_ctx = GNUNET_malloc (sizeof (struct CoreContext));
4867           core_ctx->daemon = pg->peers[i].daemon;
4868           /* Set back pointer to topology iteration context */
4869           core_ctx->iter_context = topology_context;
4870           GNUNET_SCHEDULER_add_now (&schedule_get_topology, core_ctx);
4871           total_count++;
4872         }
4873     }
4874   if (total_count == 0)
4875     {
4876       cb (cls, NULL, NULL, "Cannot iterate over topology, no running peers!");
4877       GNUNET_free (topology_context);
4878     }
4879   else
4880     topology_context->total = total_count;
4881   return;
4882 }
4883
4884 /**
4885  * Callback function to process statistic values.
4886  * This handler is here only really to insert a peer
4887  * identity (or daemon) so the statistics can be uniquely
4888  * tied to a single running peer.
4889  *
4890  * @param cls closure
4891  * @param subsystem name of subsystem that created the statistic
4892  * @param name the name of the datum
4893  * @param value the current value
4894  * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
4895  * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
4896  */
4897 static int
4898 internal_stats_callback(void *cls, const char *subsystem, const char *name,
4899                         uint64_t value, int is_persistent)
4900 {
4901   struct StatsCoreContext *core_context = cls;
4902   struct StatsIterateContext *stats_context =
4903       (struct StatsIterateContext *) core_context->iter_context;
4904
4905   return stats_context->proc (stats_context->cls, &core_context->daemon->id,
4906                               subsystem, name, value, is_persistent);
4907 }
4908
4909 /**
4910  * Internal continuation call for statistics iteration.
4911  *
4912  * @param cls closure, the CoreContext for this iteration
4913  * @param success whether or not the statistics iterations
4914  *        was canceled or not (we don't care)
4915  */
4916 static void
4917 internal_stats_cont(void *cls, int success)
4918 {
4919   struct StatsCoreContext *core_context = cls;
4920   struct StatsIterateContext *stats_context =
4921       (struct StatsIterateContext *) core_context->iter_context;
4922
4923   stats_context->connected--;
4924   stats_context->completed++;
4925
4926   if (stats_context->completed == stats_context->total)
4927     {
4928       stats_context->cont (stats_context->cls, GNUNET_YES);
4929       GNUNET_free (stats_context);
4930     }
4931
4932   if (core_context->stats_handle != NULL)
4933     GNUNET_STATISTICS_destroy (core_context->stats_handle, GNUNET_NO);
4934
4935   GNUNET_free (core_context);
4936 }
4937
4938 /**
4939  * Check running topology iteration tasks, if below max start a new one, otherwise
4940  * schedule for some time in the future.
4941  */
4942 static void
4943 schedule_get_statistics(void *cls,
4944                         const struct GNUNET_SCHEDULER_TaskContext *tc)
4945 {
4946   struct StatsCoreContext *core_context = cls;
4947   struct StatsIterateContext *stats_context =
4948       (struct StatsIterateContext *) core_context->iter_context;
4949
4950   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
4951     return;
4952
4953   if (stats_context->connected > stats_context->pg->max_outstanding_connections)
4954     {
4955 #if VERBOSE_TESTING > 2
4956       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4957           _
4958           ("Delaying connect, we have too many outstanding connections!\n"));
4959 #endif
4960       GNUNET_SCHEDULER_add_delayed (
4961                                     GNUNET_TIME_relative_multiply (
4962                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4963                                                                    100),
4964                                     &schedule_get_statistics, core_context);
4965     }
4966   else
4967     {
4968 #if VERBOSE_TESTING > 2
4969       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4970           _("Creating connection, outstanding_connections is %d\n"),
4971           outstanding_connects);
4972 #endif
4973
4974       stats_context->connected++;
4975       core_context->stats_handle
4976           = GNUNET_STATISTICS_create ("testing", core_context->daemon->cfg);
4977       if (core_context->stats_handle == NULL)
4978         {
4979           internal_stats_cont (core_context, GNUNET_NO);
4980           return;
4981         }
4982
4983       core_context->stats_get_handle
4984           = GNUNET_STATISTICS_get (core_context->stats_handle, NULL, NULL,
4985                                    GNUNET_TIME_relative_get_forever (),
4986                                    &internal_stats_cont,
4987                                    &internal_stats_callback, core_context);
4988       if (core_context->stats_get_handle == NULL)
4989         internal_stats_cont (core_context, GNUNET_NO);
4990
4991     }
4992 }
4993
4994 struct DuplicateStats
4995 {
4996   /**
4997    * Next item in the list
4998    */
4999   struct DuplicateStats *next;
5000
5001   /**
5002    * Nasty string, concatenation of relevant information.
5003    */
5004   char *unique_string;
5005 };
5006
5007 /**
5008  * Check whether the combination of port/host/unix domain socket
5009  * already exists in the list of peers being checked for statistics.
5010  *
5011  * @param pg the peergroup in question
5012  * @param specific_peer the peer we're concerned with
5013  * @param stats_list the list to return to the caller
5014  *
5015  * @return GNUNET_YES if the statistics instance has been seen already,
5016  *         GNUNET_NO if not (and we may have added it to the list)
5017  */
5018 static int
5019 stats_check_existing(struct GNUNET_TESTING_PeerGroup *pg,
5020                      struct PeerData *specific_peer,
5021                      struct DuplicateStats **stats_list)
5022 {
5023   struct DuplicateStats *pos;
5024   char *unix_domain_socket;
5025   unsigned long long port;
5026   char *to_match;
5027   if (GNUNET_YES
5028       != GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "testing",
5029                                                "single_statistics_per_host"))
5030     return GNUNET_NO; /* Each peer has its own statistics instance, do nothing! */
5031
5032   pos = *stats_list;
5033   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (specific_peer->cfg,
5034                                                           "statistics",
5035                                                           "unixpath",
5036                                                           &unix_domain_socket))
5037     return GNUNET_NO;
5038
5039   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (specific_peer->cfg,
5040                                                           "statistics", "port",
5041                                                           &port))
5042     {
5043       GNUNET_free(unix_domain_socket);
5044       return GNUNET_NO;
5045     }
5046
5047   if (specific_peer->daemon->hostname != NULL)
5048     GNUNET_asprintf (&to_match, "%s%s%llu", specific_peer->daemon->hostname,
5049                      unix_domain_socket, port);
5050   else
5051     GNUNET_asprintf (&to_match, "%s%llu", unix_domain_socket, port);
5052
5053   while (pos != NULL)
5054     {
5055       if (0 == strcmp (to_match, pos->unique_string))
5056         {
5057           GNUNET_free (unix_domain_socket);
5058           GNUNET_free (to_match);
5059           return GNUNET_YES;
5060         }
5061       pos = pos->next;
5062     }
5063   pos = GNUNET_malloc (sizeof (struct DuplicateStats));
5064   pos->unique_string = to_match;
5065   pos->next = *stats_list;
5066   *stats_list = pos;
5067   GNUNET_free (unix_domain_socket);
5068   return GNUNET_NO;
5069 }
5070
5071 /**
5072  * Iterate over all (running) peers in the peer group, retrieve
5073  * all statistics from each.
5074  */
5075 void
5076 GNUNET_TESTING_get_statistics(struct GNUNET_TESTING_PeerGroup *pg,
5077                               GNUNET_STATISTICS_Callback cont,
5078                               GNUNET_TESTING_STATISTICS_Iterator proc,
5079                               void *cls)
5080 {
5081   struct StatsIterateContext *stats_context;
5082   struct StatsCoreContext *core_ctx;
5083   unsigned int i;
5084   unsigned int total_count;
5085   struct DuplicateStats *stats_list;
5086   struct DuplicateStats *pos;
5087   stats_list = NULL;
5088
5089   /* Allocate a single stats iteration context */
5090   stats_context = GNUNET_malloc (sizeof (struct StatsIterateContext));
5091   stats_context->cont = cont;
5092   stats_context->proc = proc;
5093   stats_context->cls = cls;
5094   stats_context->pg = pg;
5095   total_count = 0;
5096
5097   for (i = 0; i < pg->total; i++)
5098     {
5099       if ((pg->peers[i].daemon->running == GNUNET_YES) && (GNUNET_NO
5100           == stats_check_existing (pg, &pg->peers[i], &stats_list)))
5101         {
5102           /* Allocate one core context per core we need to connect to */
5103           core_ctx = GNUNET_malloc (sizeof (struct StatsCoreContext));
5104           core_ctx->daemon = pg->peers[i].daemon;
5105           /* Set back pointer to topology iteration context */
5106           core_ctx->iter_context = stats_context;
5107           GNUNET_SCHEDULER_add_now (&schedule_get_statistics, core_ctx);
5108           total_count++;
5109         }
5110     }
5111
5112   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5113               "Retrieving stats from %u total instances.\n", total_count);
5114   stats_context->total = total_count;
5115   if (stats_list != NULL)
5116     {
5117       pos = stats_list;
5118       while (pos != NULL)
5119         {
5120           GNUNET_free (pos->unique_string);
5121           stats_list = pos->next;
5122           GNUNET_free (pos);
5123           pos = stats_list->next;
5124         }
5125     }
5126   return;
5127 }
5128
5129 /**
5130  * Stop the connection process temporarily.
5131  *
5132  * @param pg the peer group to stop connecting
5133  */
5134 void
5135 GNUNET_TESTING_stop_connections(struct GNUNET_TESTING_PeerGroup *pg)
5136 {
5137   pg->stop_connects = GNUNET_YES;
5138 }
5139
5140 /**
5141  * Resume the connection process temporarily.
5142  *
5143  * @param pg the peer group to resume connecting
5144  */
5145 void
5146 GNUNET_TESTING_resume_connections(struct GNUNET_TESTING_PeerGroup *pg)
5147 {
5148   pg->stop_connects = GNUNET_NO;
5149 }
5150
5151 /**
5152  * There are many ways to connect peers that are supported by this function.
5153  * To connect peers in the same topology that was created via the
5154  * GNUNET_TESTING_create_topology, the topology variable must be set to
5155  * GNUNET_TESTING_TOPOLOGY_NONE.  If the topology variable is specified,
5156  * a new instance of that topology will be generated and attempted to be
5157  * connected.  This could result in some connections being impossible,
5158  * because some topologies are non-deterministic.
5159  *
5160  * @param pg the peer group struct representing the running peers
5161  * @param topology which topology to connect the peers in
5162  * @param options options for connecting the topology
5163  * @param option_modifier modifier for options that take a parameter
5164  * @param connect_timeout how long to wait before giving up on connecting
5165  *                        two peers
5166  * @param connect_attempts how many times to attempt to connect two peers
5167  *                         over the connect_timeout duration
5168  * @param notify_callback notification to be called once all connections completed
5169  * @param notify_cls closure for notification callback
5170  *
5171  * @return the number of connections that will be attempted, GNUNET_SYSERR on error
5172  */
5173 int
5174 GNUNET_TESTING_connect_topology(
5175                                 struct GNUNET_TESTING_PeerGroup *pg,
5176                                 enum GNUNET_TESTING_Topology topology,
5177                                 enum GNUNET_TESTING_TopologyOption options,
5178                                 double option_modifier,
5179                                 struct GNUNET_TIME_Relative connect_timeout,
5180                                 unsigned int connect_attempts,
5181                                 GNUNET_TESTING_NotifyCompletion notify_callback,
5182                                 void *notify_cls)
5183 {
5184   switch (topology)
5185     {
5186   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
5187 #if VERBOSE_TOPOLOGY
5188     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5189                 _("Creating clique CONNECT topology\n"));
5190 #endif
5191     create_clique (pg, &add_connections, CONNECT, GNUNET_NO);
5192     break;
5193   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
5194 #if VERBOSE_TOPOLOGY
5195     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5196                 _("Creating small world (ring) CONNECT topology\n"));
5197 #endif
5198     create_small_world_ring (pg, &add_connections, CONNECT);
5199     break;
5200   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
5201 #if VERBOSE_TOPOLOGY
5202     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5203                 _("Creating small world (2d-torus) CONNECT topology\n"));
5204 #endif
5205     create_small_world (pg, &add_connections, CONNECT);
5206     break;
5207   case GNUNET_TESTING_TOPOLOGY_RING:
5208 #if VERBOSE_TOPOLOGY
5209     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring CONNECT topology\n"));
5210 #endif
5211     create_ring (pg, &add_connections, CONNECT);
5212     break;
5213   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
5214 #if VERBOSE_TOPOLOGY
5215     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5216                 _("Creating 2d torus CONNECT topology\n"));
5217 #endif
5218     create_2d_torus (pg, &add_connections, CONNECT);
5219     break;
5220   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
5221 #if VERBOSE_TOPOLOGY
5222     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5223                 _("Creating Erdos-Renyi CONNECT topology\n"));
5224 #endif
5225     create_erdos_renyi (pg, &add_connections, CONNECT);
5226     break;
5227   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
5228 #if VERBOSE_TOPOLOGY
5229     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5230                 _("Creating InterNAT CONNECT topology\n"));
5231 #endif
5232     create_nated_internet (pg, &add_connections, CONNECT);
5233     break;
5234   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
5235 #if VERBOSE_TOPOLOGY
5236     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5237                 _("Creating Scale Free CONNECT topology\n"));
5238 #endif
5239     create_scale_free (pg, &add_connections, CONNECT);
5240     break;
5241   case GNUNET_TESTING_TOPOLOGY_LINE:
5242 #if VERBOSE_TOPOLOGY
5243     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5244                 _("Creating straight line CONNECT topology\n"));
5245 #endif
5246     create_line (pg, &add_connections, CONNECT);
5247     break;
5248   case GNUNET_TESTING_TOPOLOGY_NONE:
5249 #if VERBOSE_TOPOLOGY
5250     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating no CONNECT topology\n"));
5251 #endif
5252     copy_allowed_topology (pg);
5253     break;
5254   default:
5255     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5256     ("Unknown topology specification, can't connect peers!\n"));
5257     return GNUNET_SYSERR;
5258     }
5259
5260   switch (options)
5261     {
5262   case GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM:
5263 #if VERBOSE_TOPOLOGY
5264     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5265     ("Connecting random subset (%'.2f percent) of possible peers\n"), 100
5266         * option_modifier);
5267 #endif
5268     choose_random_connections (pg, option_modifier);
5269     break;
5270   case GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM:
5271 #if VERBOSE_TOPOLOGY
5272     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5273                 _("Connecting a minimum of %u peers each (if possible)\n"),
5274                 (unsigned int) option_modifier);
5275 #endif
5276     choose_minimum (pg, (unsigned int) option_modifier);
5277     break;
5278   case GNUNET_TESTING_TOPOLOGY_OPTION_DFS:
5279 #if VERBOSE_TOPOLOGY
5280     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5281     ("Using DFS to connect a minimum of %u peers each (if possible)\n"),
5282                 (unsigned int) option_modifier);
5283 #endif
5284 #if FIXME
5285     perform_dfs (pg, (int) option_modifier);
5286 #endif
5287     break;
5288   case GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST:
5289 #if VERBOSE_TOPOLOGY
5290     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5291     ("Finding additional %u closest peers each (if possible)\n"),
5292                 (unsigned int) option_modifier);
5293 #endif
5294 #if FIXME
5295     add_closest (pg, (unsigned int) option_modifier,
5296         &add_connections, CONNECT);
5297 #endif
5298     break;
5299   case GNUNET_TESTING_TOPOLOGY_OPTION_NONE:
5300     break;
5301   case GNUNET_TESTING_TOPOLOGY_OPTION_ALL:
5302     break;
5303   default:
5304     break;
5305     }
5306
5307   return connect_topology (pg, connect_timeout, connect_attempts,
5308                            notify_callback, notify_cls);
5309 }
5310
5311 /**
5312  * Lookup and return the number of SSH connections to a host.
5313  *
5314  * @param hostname the hostname to lookup in the list
5315  * @param pg the peergroup that the host belongs to
5316  *
5317  * @return the number of current ssh connections to the host
5318  */
5319 static unsigned int
5320 count_outstanding_at_host(const char *hostname,
5321                           struct GNUNET_TESTING_PeerGroup *pg)
5322 {
5323   struct OutstandingSSH *pos;
5324   pos = pg->ssh_head;
5325   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5326     pos = pos->next;
5327   GNUNET_assert(pos != NULL);
5328   return pos->outstanding;
5329 }
5330
5331 /**
5332  * Increment the number of SSH connections to a host by one.
5333  *
5334  * @param hostname the hostname to lookup in the list
5335  * @param pg the peergroup that the host belongs to
5336  *
5337  */
5338 static void
5339 increment_outstanding_at_host(const char *hostname,
5340                               struct GNUNET_TESTING_PeerGroup *pg)
5341 {
5342   struct OutstandingSSH *pos;
5343   pos = pg->ssh_head;
5344   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5345     pos = pos->next;
5346   GNUNET_assert(pos != NULL);
5347   pos->outstanding++;
5348 }
5349
5350 /**
5351  * Decrement the number of SSH connections to a host by one.
5352  *
5353  * @param hostname the hostname to lookup in the list
5354  * @param pg the peergroup that the host belongs to
5355  *
5356  */
5357 static void
5358 decrement_outstanding_at_host(const char *hostname,
5359                               struct GNUNET_TESTING_PeerGroup *pg)
5360 {
5361   struct OutstandingSSH *pos;
5362   pos = pg->ssh_head;
5363   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5364     pos = pos->next;
5365   GNUNET_assert(pos != NULL);
5366   pos->outstanding--;
5367 }
5368
5369 /**
5370  * Callback that is called whenever a hostkey is generated
5371  * for a peer.  Call the real callback and decrement the
5372  * starting counter for the peergroup.
5373  *
5374  * @param cls closure
5375  * @param id identifier for the daemon, NULL on error
5376  * @param d handle for the daemon
5377  * @param emsg error message (NULL on success)
5378  */
5379 static void
5380 internal_hostkey_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5381                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5382 {
5383   struct InternalStartContext *internal_context = cls;
5384   internal_context->peer->pg->starting--;
5385   internal_context->peer->pg->started++;
5386   if (internal_context->hostname != NULL)
5387     decrement_outstanding_at_host (internal_context->hostname,
5388                                    internal_context->peer->pg);
5389   if (internal_context->hostkey_callback != NULL)
5390     internal_context->hostkey_callback (internal_context->hostkey_cls, id, d,
5391                                         emsg);
5392   else if (internal_context->peer->pg->started
5393       == internal_context->peer->pg->total)
5394     {
5395       internal_context->peer->pg->started = 0; /* Internal startup may use this counter! */
5396       GNUNET_TESTING_daemons_continue_startup (internal_context->peer->pg);
5397     }
5398 }
5399
5400 /**
5401  * Callback that is called whenever a peer has finished starting.
5402  * Call the real callback and decrement the starting counter
5403  * for the peergroup.
5404  *
5405  * @param cls closure
5406  * @param id identifier for the daemon, NULL on error
5407  * @param cfg config
5408  * @param d handle for the daemon
5409  * @param emsg error message (NULL on success)
5410  */
5411 static void
5412 internal_startup_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5413                           const struct GNUNET_CONFIGURATION_Handle *cfg,
5414                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5415 {
5416   struct InternalStartContext *internal_context = cls;
5417   internal_context->peer->pg->starting--;
5418   if (internal_context->hostname != NULL)
5419     decrement_outstanding_at_host (internal_context->hostname,
5420                                    internal_context->peer->pg);
5421   if (internal_context->start_cb != NULL)
5422     internal_context->start_cb (internal_context->start_cb_cls, id, cfg, d,
5423                                 emsg);
5424 }
5425
5426 static void
5427 internal_continue_startup(void *cls,
5428                           const struct GNUNET_SCHEDULER_TaskContext *tc)
5429 {
5430   struct InternalStartContext *internal_context = cls;
5431
5432   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
5433     {
5434       return;
5435     }
5436
5437   if ((internal_context->peer->pg->starting
5438       < internal_context->peer->pg->max_concurrent_ssh)
5439       || ((internal_context->hostname != NULL)
5440           && (count_outstanding_at_host (internal_context->hostname,
5441                                          internal_context->peer->pg)
5442               < internal_context->peer->pg->max_concurrent_ssh)))
5443     {
5444       if (internal_context->hostname != NULL)
5445         increment_outstanding_at_host (internal_context->hostname,
5446                                        internal_context->peer->pg);
5447       internal_context->peer->pg->starting++;
5448       GNUNET_TESTING_daemon_continue_startup (internal_context->peer->daemon);
5449     }
5450   else
5451     {
5452       GNUNET_SCHEDULER_add_delayed (
5453                                     GNUNET_TIME_relative_multiply (
5454                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5455                                                                    100),
5456                                     &internal_continue_startup,
5457                                     internal_context);
5458     }
5459 }
5460
5461 /**
5462  * Callback for informing us about a successful
5463  * or unsuccessful churn start call.
5464  *
5465  * @param cls a ChurnContext
5466  * @param id the peer identity of the started peer
5467  * @param cfg the handle to the configuration of the peer
5468  * @param d handle to the daemon for the peer
5469  * @param emsg NULL on success, non-NULL on failure
5470  *
5471  */
5472 void
5473 churn_start_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5474                      const struct GNUNET_CONFIGURATION_Handle *cfg,
5475                      struct GNUNET_TESTING_Daemon *d, const char *emsg)
5476 {
5477   struct ChurnRestartContext *startup_ctx = cls;
5478   struct ChurnContext *churn_ctx = startup_ctx->churn_ctx;
5479
5480   unsigned int total_left;
5481   char *error_message;
5482
5483   error_message = NULL;
5484   if (emsg != NULL)
5485     {
5486       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5487                   "Churn stop callback failed with error `%s'\n", emsg);
5488       churn_ctx->num_failed_start++;
5489     }
5490   else
5491     {
5492       churn_ctx->num_to_start--;
5493     }
5494
5495 #if DEBUG_CHURN
5496   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5497       "Started peer, %d left.\n", churn_ctx->num_to_start);
5498 #endif
5499
5500   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
5501       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
5502
5503   if (total_left == 0)
5504     {
5505       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
5506         GNUNET_asprintf (
5507                          &error_message,
5508                          "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
5509                          churn_ctx->num_failed_start,
5510                          churn_ctx->num_failed_stop);
5511       churn_ctx->cb (churn_ctx->cb_cls, error_message);
5512       GNUNET_free_non_null (error_message);
5513       GNUNET_free (churn_ctx);
5514       GNUNET_free (startup_ctx);
5515     }
5516 }
5517
5518 static void
5519 schedule_churn_restart(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5520 {
5521   struct PeerRestartContext *peer_restart_ctx = cls;
5522   struct ChurnRestartContext *startup_ctx = peer_restart_ctx->churn_restart_ctx;
5523
5524   if (startup_ctx->outstanding > startup_ctx->pg->max_concurrent_ssh)
5525     GNUNET_SCHEDULER_add_delayed (
5526                                   GNUNET_TIME_relative_multiply (
5527                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
5528                                                                  100),
5529                                   &schedule_churn_restart, peer_restart_ctx);
5530   else
5531     {
5532       GNUNET_TESTING_daemon_start_stopped (peer_restart_ctx->daemon,
5533                                            startup_ctx->timeout,
5534                                            &churn_start_callback, startup_ctx);
5535       GNUNET_free (peer_restart_ctx);
5536     }
5537 }
5538
5539
5540 static void
5541 internal_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5542 {
5543   struct InternalStartContext *internal_context = cls;
5544
5545   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
5546     {
5547       return;
5548     }
5549
5550   if ((internal_context->peer->pg->starting
5551       < internal_context->peer->pg->max_concurrent_ssh)
5552       || ((internal_context->hostname != NULL)
5553           && (count_outstanding_at_host (internal_context->hostname,
5554                                          internal_context->peer->pg)
5555               < internal_context->peer->pg->max_concurrent_ssh)))
5556     {
5557       if (internal_context->hostname != NULL)
5558         increment_outstanding_at_host (internal_context->hostname,
5559                                        internal_context->peer->pg);
5560       internal_context->peer->pg->starting++;
5561       internal_context->peer->daemon
5562           = GNUNET_TESTING_daemon_start (internal_context->peer->cfg,
5563                                          internal_context->timeout,
5564                                          GNUNET_NO,
5565                                          internal_context->hostname,
5566                                          internal_context->username,
5567                                          internal_context->sshport,
5568                                          internal_context->hostkey,
5569                                          &internal_hostkey_callback,
5570                                          internal_context,
5571                                          &internal_startup_callback,
5572                                          internal_context);
5573     }
5574   else
5575     {
5576       GNUNET_SCHEDULER_add_delayed (
5577                                     GNUNET_TIME_relative_multiply (
5578                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5579                                                                    100),
5580                                     &internal_start, internal_context);
5581     }
5582 }
5583 #if USE_START_HELPER
5584
5585 struct PeerStartHelperContext
5586 {
5587   struct GNUNET_TESTING_PeerGroup *pg;
5588
5589   struct HostData *host;
5590
5591   struct GNUNET_OS_Process *proc;
5592 };
5593
5594 static void
5595 check_peers_started (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5596 {
5597   struct PeerStartHelperContext *helper = cls;
5598   enum GNUNET_OS_ProcessStatusType type;
5599   unsigned long code;
5600   unsigned int i;
5601   GNUNET_TESTING_NotifyDaemonRunning cb;
5602
5603   if (GNUNET_NO == GNUNET_OS_process_status (helper->proc, &type, &code)) /* Still running, wait some more! */
5604   {
5605     GNUNET_SCHEDULER_add_delayed(GNUNET_CONSTANTS_EXEC_WAIT, &check_peers_started, helper);
5606     return;
5607   }
5608
5609   helper->pg->starting--;
5610   if (helper->pg->starting == 0) /* All peers have finished starting! */
5611     {
5612       /* Call the peer started callback for each peer, set proper FSM state (?) */
5613       for (i = 0; i < helper->pg->total; i++)
5614         {
5615           cb = helper->pg->peers[i].daemon->cb;
5616           helper->pg->peers[i].daemon->cb = NULL;
5617           helper->pg->peers[i].daemon->running = GNUNET_YES;
5618           helper->pg->peers[i].daemon->phase = SP_START_DONE;
5619           if (NULL != cb)
5620           {
5621             if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
5622               cb (helper->pg->peers[i].daemon->cb_cls,
5623                   &helper->pg->peers[i].daemon->id,
5624                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5625                   "Failed to execute peerStartHelper.pl, or return code bad!");
5626             else
5627               cb (helper->pg->peers[i].daemon->cb_cls,
5628                   &helper->pg->peers[i].daemon->id,
5629                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5630                   NULL);
5631
5632           }
5633
5634         }
5635     }
5636   GNUNET_OS_process_close(helper->proc);
5637 }
5638
5639 static void
5640 start_peer_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5641 {
5642   struct PeerStartHelperContext *helper = cls;
5643   char *baseservicehome;
5644   char *tempdir;
5645   char *arg;
5646   /* ssh user@host peerStartHelper /path/to/basedirectory */
5647   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (helper->pg->cfg, "PATHS", "SERVICEHOME",
5648                                                                     &baseservicehome));
5649   GNUNET_asprintf(&tempdir, "%s/%s/", baseservicehome, helper->host->hostname);
5650   if (NULL != helper->host->username)
5651     GNUNET_asprintf (&arg, "%s@%s", helper->host->username, helper->host->hostname);
5652   else
5653     GNUNET_asprintf (&arg, "%s", helper->host->hostname);
5654
5655   /* FIXME: Doesn't support ssh_port option! */
5656   helper->proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5657                                   "peerStartHelper.pl", tempdir,  NULL);
5658   GNUNET_assert(helper->proc != NULL);
5659   GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "starting peers with cmd ssh %s %s %s\n", arg, "peerStartHelper.pl", tempdir);
5660   GNUNET_SCHEDULER_add_now (&check_peers_started, helper);
5661   GNUNET_free (tempdir);
5662   GNUNET_free (baseservicehome);
5663   GNUNET_free (arg);
5664 }
5665 #endif
5666
5667 /**
5668  * Function which continues a peer group starting up
5669  * after successfully generating hostkeys for each peer.
5670  *
5671  * @param pg the peer group to continue starting
5672  *
5673  */
5674 void
5675 GNUNET_TESTING_daemons_continue_startup(struct GNUNET_TESTING_PeerGroup *pg)
5676 {
5677   unsigned int i;
5678
5679 #if USE_START_HELPER
5680   if ((pg->num_hosts > 0) && (pg->hostkey_data != NULL))
5681     {
5682       struct PeerStartHelperContext *helper;
5683       pg->starting = pg->num_hosts;
5684       for (i = 0; i < pg->num_hosts; i++)
5685         {
5686           helper = GNUNET_malloc(sizeof(struct PeerStartHelperContext));
5687           helper->pg = pg;
5688           helper->host = &pg->hosts[i];
5689           GNUNET_SCHEDULER_add_now(&start_peer_helper, helper);
5690         }
5691     }
5692   else
5693     {
5694       pg->starting = 0;
5695       for (i = 0; i < pg->total; i++)
5696         {
5697           GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5698                                     &pg->peers[i].internal_context);
5699         }
5700     }
5701 #else
5702   pg->starting = 0;
5703   for (i = 0; i < pg->total; i++)
5704     {
5705       GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5706                                 &pg->peers[i].internal_context);
5707     }
5708 #endif
5709 }
5710
5711 #if USE_START_HELPER
5712 static void
5713 call_hostkey_callbacks (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5714 {
5715   struct GNUNET_TESTING_PeerGroup *pg = cls;
5716   unsigned int i;
5717   for (i = 0; i < pg->total; i++)
5718     {
5719       if (pg->peers[i].internal_context.hostkey_callback != NULL)
5720         pg->peers[i].internal_context.hostkey_callback (pg->peers[i].internal_context.hostkey_cls,
5721                                                            &pg->peers[i].daemon->id,
5722                                                            pg->peers[i].daemon,
5723                                                            NULL);
5724     }
5725
5726   if (pg->peers[0].internal_context.hostkey_callback == NULL)
5727     GNUNET_TESTING_daemons_continue_startup (pg);
5728 }
5729 #endif
5730
5731 /**
5732  * Start count gnunet instances with the same set of transports and
5733  * applications.  The port numbers (any option called "PORT") will be
5734  * adjusted to ensure that no two peers running on the same system
5735  * have the same port(s) in their respective configurations.
5736  *
5737  * @param cfg configuration template to use
5738  * @param total number of daemons to start
5739  * @param max_concurrent_connections for testing, how many peers can
5740  *                                   we connect to simultaneously
5741  * @param max_concurrent_ssh when starting with ssh, how many ssh
5742  *        connections will we allow at once (based on remote hosts allowed!)
5743  * @param timeout total time allowed for peers to start
5744  * @param hostkey_callback function to call on each peers hostkey generation
5745  *        if NULL, peers will be started by this call, if non-null,
5746  *        GNUNET_TESTING_daemons_continue_startup must be called after
5747  *        successful hostkey generation
5748  * @param hostkey_cls closure for hostkey callback
5749  * @param cb function to call on each daemon that was started
5750  * @param cb_cls closure for cb
5751  * @param connect_callback function to call each time two hosts are connected
5752  * @param connect_callback_cls closure for connect_callback
5753  * @param hostnames linked list of host structs to use to start peers on
5754  *                  (NULL to run on localhost only)
5755  *
5756  * @return NULL on error, otherwise handle to control peer group
5757  */
5758 struct GNUNET_TESTING_PeerGroup *
5759 GNUNET_TESTING_daemons_start(const struct GNUNET_CONFIGURATION_Handle *cfg,
5760                              unsigned int total,
5761                              unsigned int max_concurrent_connections,
5762                              unsigned int max_concurrent_ssh,
5763                              struct GNUNET_TIME_Relative timeout,
5764                              GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
5765                              void *hostkey_cls,
5766                              GNUNET_TESTING_NotifyDaemonRunning cb,
5767                              void *cb_cls,
5768                              GNUNET_TESTING_NotifyConnection connect_callback,
5769                              void *connect_callback_cls,
5770                              const struct GNUNET_TESTING_Host *hostnames)
5771 {
5772   struct GNUNET_TESTING_PeerGroup *pg;
5773   const struct GNUNET_TESTING_Host *hostpos;
5774   const char *hostname;
5775   const char *username;
5776   char *baseservicehome;
5777   char *newservicehome;
5778   char *tmpdir;
5779   char *hostkeys_file;
5780   char *arg;
5781   char *ssh_port_str;
5782   struct GNUNET_DISK_FileHandle *fd;
5783   struct GNUNET_CONFIGURATION_Handle *pcfg;
5784   unsigned int off;
5785   struct OutstandingSSH *ssh_entry;
5786   unsigned int hostcnt;
5787   unsigned int i;
5788   uint16_t minport;
5789   uint16_t sshport;
5790   uint32_t upnum;
5791   uint32_t fdnum;
5792   uint64_t fs;
5793   uint64_t total_hostkeys;
5794   struct GNUNET_OS_Process *proc;
5795
5796   if (0 == total)
5797     {
5798       GNUNET_break (0);
5799       return NULL;
5800     }
5801
5802   upnum = 0;
5803   fdnum = 0;
5804   pg = GNUNET_malloc (sizeof (struct GNUNET_TESTING_PeerGroup));
5805   pg->cfg = cfg;
5806   pg->notify_connection = connect_callback;
5807   pg->notify_connection_cls = connect_callback_cls;
5808   pg->total = total;
5809   pg->max_timeout = GNUNET_TIME_relative_to_absolute (timeout);
5810   pg->peers = GNUNET_malloc (total * sizeof (struct PeerData));
5811   pg->max_outstanding_connections = max_concurrent_connections;
5812   pg->max_concurrent_ssh = max_concurrent_ssh;
5813   if (NULL != hostnames)
5814     {
5815       off = 0;
5816       hostpos = hostnames;
5817       while (hostpos != NULL)
5818         {
5819           hostpos = hostpos->next;
5820           off++;
5821         }
5822       pg->hosts = GNUNET_malloc (off * sizeof (struct HostData));
5823       off = 0;
5824
5825       hostpos = hostnames;
5826       while (hostpos != NULL)
5827         {
5828           pg->hosts[off].minport = LOW_PORT;
5829           pg->hosts[off].hostname = GNUNET_strdup (hostpos->hostname);
5830           if (hostpos->username != NULL)
5831             pg->hosts[off].username = GNUNET_strdup (hostpos->username);
5832           pg->hosts[off].sshport = hostpos->port;
5833           hostpos = hostpos->next;
5834           off++;
5835         }
5836
5837       if (off == 0)
5838         {
5839           pg->hosts = NULL;
5840         }
5841       hostcnt = off;
5842       minport = 0;
5843       pg->num_hosts = off;
5844     }
5845   else
5846     {
5847       hostcnt = 0;
5848       minport = LOW_PORT;
5849     }
5850
5851   /* Create the servicehome directory for each remote peer */
5852   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg, "PATHS", "SERVICEHOME",
5853                                                                     &baseservicehome));
5854   for (i = 0; i < pg->num_hosts; i++)
5855     {
5856       ssh_entry = GNUNET_malloc(sizeof(struct OutstandingSSH));
5857       ssh_entry->hostname = pg->hosts[i].hostname; /* Don't free! */
5858       GNUNET_CONTAINER_DLL_insert(pg->ssh_head, pg->ssh_tail, ssh_entry);
5859       GNUNET_asprintf(&tmpdir, "%s/%s", baseservicehome, pg->hosts[i].hostname);
5860       if (NULL != pg->hosts[i].username)
5861         GNUNET_asprintf (&arg, "%s@%s", pg->hosts[i].username,
5862                          pg->hosts[i].hostname);
5863       else
5864         GNUNET_asprintf (&arg, "%s", pg->hosts[i].hostname);
5865       if (pg->hosts[i].sshport != 0)
5866         {
5867           GNUNET_asprintf (&ssh_port_str, "%d", pg->hosts[i].sshport);
5868           proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", "-P",
5869                                           ssh_port_str,
5870 #if !DEBUG_TESTING
5871                                           "-q",
5872 #endif
5873                                           arg, "mkdir -p", tmpdir,
5874                                           NULL);
5875         }
5876       else
5877         proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5878                                         "mkdir -p", tmpdir, NULL);
5879       GNUNET_assert(proc != NULL);
5880       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5881                   "Creating remote dir with command ssh %s %s %s\n", arg,
5882                   " mkdir -p ", tmpdir);
5883       GNUNET_free(tmpdir);
5884       GNUNET_free(arg);
5885       GNUNET_OS_process_wait (proc);
5886       GNUNET_OS_process_close(proc);
5887     }
5888   GNUNET_free(baseservicehome);
5889
5890   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (cfg, "TESTING",
5891                                                            "HOSTKEYSFILE",
5892                                                            &hostkeys_file))
5893     {
5894       if (GNUNET_YES != GNUNET_DISK_file_test (hostkeys_file))
5895         GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Couldn't read hostkeys file!\n");
5896       else
5897         {
5898           /* Check hostkey file size, read entire thing into memory */
5899           fd = GNUNET_DISK_file_open (hostkeys_file, GNUNET_DISK_OPEN_READ,
5900                                       GNUNET_DISK_PERM_NONE);
5901           if (NULL == fd)
5902             {
5903               GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", hostkeys_file);
5904               return NULL;
5905             }
5906
5907           if (GNUNET_YES != GNUNET_DISK_file_size (hostkeys_file, &fs,
5908                                                    GNUNET_YES))
5909             fs = 0;
5910
5911           GNUNET_log (
5912                       GNUNET_ERROR_TYPE_DEBUG,
5913                       "Found file size %llu for hostkeys, expect hostkeys to be size %d\n",
5914                       fs, HOSTKEYFILESIZE);
5915
5916           if (fs % HOSTKEYFILESIZE != 0)
5917             {
5918               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5919                           "File size %llu seems incorrect for hostkeys...\n",
5920                           fs);
5921             }
5922           else
5923             {
5924               total_hostkeys = fs / HOSTKEYFILESIZE;
5925               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5926                           "Will read %llu hostkeys from file\n", total_hostkeys);
5927               pg->hostkey_data = GNUNET_malloc_large (fs);
5928               GNUNET_assert (fs == GNUNET_DISK_file_read (fd, pg->hostkey_data, fs));
5929               GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_close(fd));
5930             }
5931         }
5932       GNUNET_free(hostkeys_file);
5933     }
5934
5935   for (off = 0; off < total; off++)
5936     {
5937       if (hostcnt > 0)
5938         {
5939           hostname = pg->hosts[off % hostcnt].hostname;
5940           username = pg->hosts[off % hostcnt].username;
5941           sshport = pg->hosts[off % hostcnt].sshport;
5942           pcfg = make_config (cfg, off, &pg->hosts[off % hostcnt].minport,
5943                               &upnum, hostname, &fdnum);
5944         }
5945       else
5946         {
5947           hostname = NULL;
5948           username = NULL;
5949           sshport = 0;
5950           pcfg = make_config (cfg, off, &minport, &upnum, hostname, &fdnum);
5951         }
5952
5953       if (NULL == pcfg)
5954         {
5955           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5956           ("Could not create configuration for peer number %u on `%s'!\n"),
5957                       off, hostname == NULL ? "localhost" : hostname);
5958           continue;
5959         }
5960
5961       if (GNUNET_YES
5962           == GNUNET_CONFIGURATION_get_value_string (pcfg, "PATHS",
5963                                                     "SERVICEHOME",
5964                                                     &baseservicehome))
5965         {
5966           if (hostname != NULL)
5967             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", baseservicehome, hostname, off);
5968           else
5969             GNUNET_asprintf (&newservicehome, "%s/%d/", baseservicehome, off);
5970 #if !USE_START_HELPER
5971           GNUNET_free (baseservicehome);
5972 #endif
5973         }
5974       else
5975         {
5976           tmpdir = getenv ("TMPDIR");
5977           tmpdir = tmpdir ? tmpdir : "/tmp";
5978           if (hostname != NULL)
5979             GNUNET_asprintf (&newservicehome, "%s/%s/%s/%d/", tmpdir, hostname,
5980                              "gnunet-testing-test-test", off);
5981           else
5982             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", tmpdir,
5983                              "gnunet-testing-test-test", off);
5984         }
5985       GNUNET_CONFIGURATION_set_value_string (pcfg, "PATHS", "SERVICEHOME",
5986                                              newservicehome);
5987       GNUNET_free (newservicehome);
5988       pg->peers[off].cfg = pcfg;
5989       pg->peers[off].pg = pg;
5990       pg->peers[off].internal_context.peer = &pg->peers[off];
5991       pg->peers[off].internal_context.timeout = timeout;
5992       pg->peers[off].internal_context.hostname = hostname;
5993       pg->peers[off].internal_context.username = username;
5994       pg->peers[off].internal_context.sshport = sshport;
5995       if (pg->hostkey_data != NULL)
5996         pg->peers[off].internal_context.hostkey = &pg->hostkey_data[off
5997             * HOSTKEYFILESIZE];
5998       pg->peers[off].internal_context.hostkey_callback = hostkey_callback;
5999       pg->peers[off].internal_context.hostkey_cls = hostkey_cls;
6000       pg->peers[off].internal_context.start_cb = cb;
6001       pg->peers[off].internal_context.start_cb_cls = cb_cls;
6002 #if !USE_START_HELPER
6003       GNUNET_SCHEDULER_add_now (&internal_start,
6004                                 &pg->peers[off].internal_context);
6005 #else
6006       if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6007         {
6008           pg->peers[off].daemon = GNUNET_TESTING_daemon_start (pcfg,
6009                                        timeout,
6010                                        GNUNET_YES,
6011                                        hostname,
6012                                        username,
6013                                        sshport,
6014                                        pg->peers[off].internal_context.hostkey,
6015                                        &internal_hostkey_callback,
6016                                        &pg->peers[off].internal_context,
6017                                        &internal_startup_callback,
6018                                        &pg->peers[off].internal_context);
6019           /**
6020            * At this point, given that we had a hostkeyfile,
6021            * we can call the hostkey callback!
6022            * But first, we should copy (rsync) all of the configs
6023            * and hostkeys to the remote peers.  Then let topology
6024            * creation happen, then call the peer start helper processes,
6025            * then set pg->whatever_phase for each peer and let them
6026            * enter the fsm to get the HELLO's for peers and start connecting.
6027            */
6028         }
6029       else
6030         {
6031           GNUNET_SCHEDULER_add_now (&internal_start,
6032                                     &pg->peers[off].internal_context);
6033         }
6034
6035 #endif
6036     }
6037
6038 #if USE_START_HELPER /* Now the peergroup has been set up, hostkeys and configs written to files. */
6039   if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6040     {
6041       for (off = 0; off < hostcnt; off++)
6042         {
6043           GNUNET_asprintf(&newservicehome, "%s/%s/", baseservicehome, pg->hosts[off].hostname);
6044
6045           if (NULL != username)
6046             GNUNET_asprintf (&arg, "%s@%s:%s/%s", username, pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6047           else
6048             GNUNET_asprintf (&arg, "%s:%s/%s", pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6049
6050           /* FIXME: Doesn't support ssh_port option! */
6051           proc = GNUNET_OS_start_process (NULL, NULL, "rsync", "rsync", "-r", newservicehome, arg, NULL);
6052
6053           GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "copying directory with command rsync -r %s %s\n", newservicehome, arg);
6054
6055           GNUNET_free (arg);
6056           if (NULL == proc)
6057             {
6058               GNUNET_log (
6059                           GNUNET_ERROR_TYPE_ERROR,
6060                           _
6061                           ("Could not start `%s' process to copy configuration directory.\n"),
6062                           "scp");
6063               GNUNET_assert(0);
6064             }
6065           GNUNET_OS_process_wait (proc);
6066           GNUNET_OS_process_close (proc);
6067         }
6068       /* Now all the configuration files and hostkeys are copied to the remote host.  Call the hostkey callback for each peer! */
6069       GNUNET_SCHEDULER_add_now(&call_hostkey_callbacks, pg);
6070     }
6071   GNUNET_free (baseservicehome);
6072 #endif
6073   return pg;
6074 }
6075
6076 /*
6077  * Get a daemon by number, so callers don't have to do nasty
6078  * offsetting operation.
6079  */
6080 struct GNUNET_TESTING_Daemon *
6081 GNUNET_TESTING_daemon_get(struct GNUNET_TESTING_PeerGroup *pg,
6082                           unsigned int position)
6083 {
6084   if (position < pg->total)
6085     return pg->peers[position].daemon;
6086   else
6087     return NULL;
6088 }
6089
6090 /*
6091  * Get a daemon by peer identity, so callers can
6092  * retrieve the daemon without knowing it's offset.
6093  *
6094  * @param pg the peer group to retrieve the daemon from
6095  * @param peer_id the peer identity of the daemon to retrieve
6096  *
6097  * @return the daemon on success, or NULL if no such peer identity is found
6098  */
6099 struct GNUNET_TESTING_Daemon *
6100 GNUNET_TESTING_daemon_get_by_id(struct GNUNET_TESTING_PeerGroup *pg,
6101                                 struct GNUNET_PeerIdentity *peer_id)
6102 {
6103   unsigned int i;
6104
6105   for (i = 0; i < pg->total; i++)
6106     {
6107       if (0 == memcmp (&pg->peers[i].daemon->id, peer_id,
6108                        sizeof(struct GNUNET_PeerIdentity)))
6109         return pg->peers[i].daemon;
6110     }
6111
6112   return NULL;
6113 }
6114
6115 /**
6116  * Prototype of a function that will be called when a
6117  * particular operation was completed the testing library.
6118  *
6119  * @param cls closure (a struct RestartContext)
6120  * @param id id of the peer that was restarted
6121  * @param cfg handle to the configuration of the peer
6122  * @param d handle to the daemon that was restarted
6123  * @param emsg NULL on success
6124  */
6125 void
6126 restart_callback(void *cls, const struct GNUNET_PeerIdentity *id,
6127                  const struct GNUNET_CONFIGURATION_Handle *cfg,
6128                  struct GNUNET_TESTING_Daemon *d, const char *emsg)
6129 {
6130   struct RestartContext *restart_context = cls;
6131
6132   if (emsg == NULL)
6133     {
6134       restart_context->peers_restarted++;
6135     }
6136   else
6137     {
6138       restart_context->peers_restart_failed++;
6139     }
6140
6141   if (restart_context->peers_restarted == restart_context->peer_group->total)
6142     {
6143       restart_context->callback (restart_context->callback_cls, NULL);
6144       GNUNET_free (restart_context);
6145     }
6146   else if (restart_context->peers_restart_failed
6147       + restart_context->peers_restarted == restart_context->peer_group->total)
6148     {
6149       restart_context->callback (restart_context->callback_cls,
6150                                  "Failed to restart peers!");
6151       GNUNET_free (restart_context);
6152     }
6153
6154 }
6155
6156 /**
6157  * Callback for informing us about a successful
6158  * or unsuccessful churn stop call.
6159  *
6160  * @param cls a ChurnContext
6161  * @param emsg NULL on success, non-NULL on failure
6162  *
6163  */
6164 void
6165 churn_stop_callback(void *cls, const char *emsg)
6166 {
6167   struct ShutdownContext *shutdown_ctx = cls;
6168   struct ChurnContext *churn_ctx = shutdown_ctx->cb_cls;
6169   unsigned int total_left;
6170   char *error_message;
6171
6172   error_message = NULL;
6173   shutdown_ctx->outstanding--;
6174
6175   if (emsg != NULL)
6176     {
6177       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6178                   "Churn stop callback failed with error `%s'\n", emsg);
6179       churn_ctx->num_failed_stop++;
6180     }
6181   else
6182     {
6183       churn_ctx->num_to_stop--;
6184     }
6185
6186 #if DEBUG_CHURN
6187   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6188       "Stopped peer, %d left.\n", churn_ctx->num_to_stop);
6189 #endif
6190   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
6191       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
6192
6193   if (total_left == 0)
6194     {
6195       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
6196         {
6197           GNUNET_asprintf (
6198                            &error_message,
6199                            "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
6200                            churn_ctx->num_failed_start,
6201                            churn_ctx->num_failed_stop);
6202         }
6203       churn_ctx->cb (churn_ctx->cb_cls, error_message);
6204       GNUNET_free_non_null (error_message);
6205       GNUNET_free (churn_ctx);
6206       GNUNET_free (shutdown_ctx);
6207     }
6208 }
6209
6210 /**
6211  * Count the number of running peers.
6212  *
6213  * @param pg handle for the peer group
6214  *
6215  * @return the number of currently running peers in the peer group
6216  */
6217 unsigned int
6218 GNUNET_TESTING_daemons_running(struct GNUNET_TESTING_PeerGroup *pg)
6219 {
6220   unsigned int i;
6221   unsigned int running = 0;
6222   for (i = 0; i < pg->total; i++)
6223     {
6224       if (pg->peers[i].daemon->running == GNUNET_YES)
6225         {
6226           GNUNET_assert (running != -1);
6227           running++;
6228         }
6229     }
6230   return running;
6231 }
6232
6233 /**
6234  * Task to rate limit the number of outstanding peer shutdown
6235  * requests.  This is necessary for making sure we don't do
6236  * too many ssh connections at once, but is generally nicer
6237  * to any system as well (graduated task starts, as opposed
6238  * to calling gnunet-arm N times all at once).
6239  */
6240 static void
6241 schedule_churn_shutdown_task(void *cls,
6242                              const struct GNUNET_SCHEDULER_TaskContext *tc)
6243 {
6244   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6245   struct ShutdownContext *shutdown_ctx;
6246   struct ChurnContext *churn_ctx;
6247   GNUNET_assert (peer_shutdown_ctx != NULL);
6248   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6249   GNUNET_assert (shutdown_ctx != NULL);
6250   churn_ctx = (struct ChurnContext *) shutdown_ctx->cb_cls;
6251   if (shutdown_ctx->outstanding > churn_ctx->pg->max_concurrent_ssh)
6252     GNUNET_SCHEDULER_add_delayed (
6253                                   GNUNET_TIME_relative_multiply (
6254                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
6255                                                                  100),
6256                                   &schedule_churn_shutdown_task,
6257                                   peer_shutdown_ctx);
6258   else
6259     {
6260       shutdown_ctx->outstanding++;
6261       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6262                                   shutdown_ctx->timeout, shutdown_ctx->cb,
6263                                   shutdown_ctx, GNUNET_NO, GNUNET_YES);
6264       GNUNET_free (peer_shutdown_ctx);
6265     }
6266 }
6267
6268 /**
6269  * Simulate churn by stopping some peers (and possibly
6270  * re-starting others if churn is called multiple times).  This
6271  * function can only be used to create leave-join churn (peers "never"
6272  * leave for good).  First "voff" random peers that are currently
6273  * online will be taken offline; then "von" random peers that are then
6274  * offline will be put back online.  No notifications will be
6275  * generated for any of these operations except for the callback upon
6276  * completion.
6277  *
6278  * @param pg handle for the peer group
6279  * @param voff number of peers that should go offline
6280  * @param von number of peers that should come back online;
6281  *            must be zero on first call (since "testbed_start"
6282  *            always starts all of the peers)
6283  * @param timeout how long to wait for operations to finish before
6284  *        giving up
6285  * @param cb function to call at the end
6286  * @param cb_cls closure for cb
6287  */
6288 void
6289 GNUNET_TESTING_daemons_churn(struct GNUNET_TESTING_PeerGroup *pg,
6290                              unsigned int voff, unsigned int von,
6291                              struct GNUNET_TIME_Relative timeout,
6292                              GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6293 {
6294   struct ChurnContext *churn_ctx;
6295   struct ShutdownContext *shutdown_ctx;
6296   struct PeerShutdownContext *peer_shutdown_ctx;
6297   struct PeerRestartContext *peer_restart_ctx;
6298   struct ChurnRestartContext *churn_startup_ctx;
6299
6300   unsigned int running;
6301   unsigned int stopped;
6302   unsigned int total_running;
6303   unsigned int total_stopped;
6304   unsigned int i;
6305   unsigned int *running_arr;
6306   unsigned int *stopped_arr;
6307   unsigned int *running_permute;
6308   unsigned int *stopped_permute;
6309
6310   running = 0;
6311   stopped = 0;
6312
6313   if ((von == 0) && (voff == 0)) /* No peers at all? */
6314     {
6315       cb (cb_cls, NULL);
6316       return;
6317     }
6318
6319   for (i = 0; i < pg->total; i++)
6320     {
6321       if (pg->peers[i].daemon->running == GNUNET_YES)
6322         {
6323           GNUNET_assert (running != -1);
6324           running++;
6325         }
6326       else
6327         {
6328           GNUNET_assert (stopped != -1);
6329           stopped++;
6330         }
6331     }
6332
6333   if (voff > running)
6334     {
6335       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6336                   "Trying to stop more peers than are currently running!\n");
6337       cb (cb_cls, "Trying to stop more peers than are currently running!");
6338       return;
6339     }
6340
6341   if (von > stopped)
6342     {
6343       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6344                   "Trying to start more peers than are currently stopped!\n");
6345       cb (cb_cls, "Trying to start more peers than are currently stopped!");
6346       return;
6347     }
6348
6349   churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6350
6351   running_arr = NULL;
6352   if (running > 0)
6353     running_arr = GNUNET_malloc (running * sizeof (unsigned int));
6354
6355   stopped_arr = NULL;
6356   if (stopped > 0)
6357     stopped_arr = GNUNET_malloc (stopped * sizeof (unsigned int));
6358
6359   running_permute = NULL;
6360   stopped_permute = NULL;
6361
6362   if (running > 0)
6363     running_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6364                                                     running);
6365   if (stopped > 0)
6366     stopped_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6367                                                     stopped);
6368
6369   total_running = running;
6370   total_stopped = stopped;
6371   running = 0;
6372   stopped = 0;
6373
6374   churn_ctx->num_to_start = von;
6375   churn_ctx->num_to_stop = voff;
6376   churn_ctx->cb = cb;
6377   churn_ctx->cb_cls = cb_cls;
6378   churn_ctx->pg = pg;
6379
6380   for (i = 0; i < pg->total; i++)
6381     {
6382       if (pg->peers[i].daemon->running == GNUNET_YES)
6383         {
6384           GNUNET_assert ((running_arr != NULL) && (total_running > running));
6385           running_arr[running] = i;
6386           running++;
6387         }
6388       else
6389         {
6390           GNUNET_assert ((stopped_arr != NULL) && (total_stopped > stopped));
6391           stopped_arr[stopped] = i;
6392           stopped++;
6393         }
6394     }
6395
6396   GNUNET_assert (running >= voff);
6397   if (voff > 0)
6398     {
6399       shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6400       shutdown_ctx->cb = &churn_stop_callback;
6401       shutdown_ctx->cb_cls = churn_ctx;
6402       shutdown_ctx->total_peers = voff;
6403       shutdown_ctx->timeout = timeout;
6404     }
6405
6406   for (i = 0; i < voff; i++)
6407     {
6408 #if DEBUG_CHURN
6409       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Stopping peer %d!\n",
6410           running_permute[i]);
6411 #endif
6412       GNUNET_assert (running_arr != NULL);
6413       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6414       peer_shutdown_ctx->daemon
6415           = pg->peers[running_arr[running_permute[i]]].daemon;
6416       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6417       GNUNET_SCHEDULER_add_now (&schedule_churn_shutdown_task,
6418                                 peer_shutdown_ctx);
6419
6420       /*
6421        GNUNET_TESTING_daemon_stop (pg->peers[running_arr[running_permute[i]]].daemon,
6422        timeout,
6423        &churn_stop_callback, churn_ctx,
6424        GNUNET_NO, GNUNET_YES); */
6425     }
6426
6427   GNUNET_assert (stopped >= von);
6428   if (von > 0)
6429     {
6430       churn_startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6431       churn_startup_ctx->churn_ctx = churn_ctx;
6432       churn_startup_ctx->timeout = timeout;
6433       churn_startup_ctx->pg = pg;
6434     }
6435   for (i = 0; i < von; i++)
6436     {
6437 #if DEBUG_CHURN
6438       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Starting up peer %d!\n",
6439           stopped_permute[i]);
6440 #endif
6441       GNUNET_assert (stopped_arr != NULL);
6442       peer_restart_ctx = GNUNET_malloc (sizeof (struct PeerRestartContext));
6443       peer_restart_ctx->churn_restart_ctx = churn_startup_ctx;
6444       peer_restart_ctx->daemon
6445           = pg->peers[stopped_arr[stopped_permute[i]]].daemon;
6446       GNUNET_SCHEDULER_add_now (&schedule_churn_restart, peer_restart_ctx);
6447       /*
6448        GNUNET_TESTING_daemon_start_stopped(pg->peers[stopped_arr[stopped_permute[i]]].daemon,
6449        timeout, &churn_start_callback, churn_ctx); */
6450     }
6451
6452   GNUNET_free_non_null (running_arr);
6453   GNUNET_free_non_null (stopped_arr);
6454   GNUNET_free_non_null (running_permute);
6455   GNUNET_free_non_null (stopped_permute);
6456 }
6457
6458 /**
6459  * Restart all peers in the given group.
6460  *
6461  * @param pg the handle to the peer group
6462  * @param callback function to call on completion (or failure)
6463  * @param callback_cls closure for the callback function
6464  */
6465 void
6466 GNUNET_TESTING_daemons_restart(struct GNUNET_TESTING_PeerGroup *pg,
6467                                GNUNET_TESTING_NotifyCompletion callback,
6468                                void *callback_cls)
6469 {
6470   struct RestartContext *restart_context;
6471   unsigned int off;
6472
6473   if (pg->total > 0)
6474     {
6475       restart_context = GNUNET_malloc (sizeof (struct RestartContext));
6476       restart_context->peer_group = pg;
6477       restart_context->peers_restarted = 0;
6478       restart_context->callback = callback;
6479       restart_context->callback_cls = callback_cls;
6480
6481       for (off = 0; off < pg->total; off++)
6482         {
6483           GNUNET_TESTING_daemon_restart (pg->peers[off].daemon,
6484                                          &restart_callback, restart_context);
6485         }
6486     }
6487 }
6488
6489 /**
6490  * Start or stop an individual peer from the given group.
6491  *
6492  * @param pg handle to the peer group
6493  * @param offset which peer to start or stop
6494  * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
6495  * @param timeout how long to wait for shutdown
6496  * @param cb function to call at the end
6497  * @param cb_cls closure for cb
6498  */
6499 void
6500 GNUNET_TESTING_daemons_vary(struct GNUNET_TESTING_PeerGroup *pg,
6501                             unsigned int offset, int desired_status,
6502                             struct GNUNET_TIME_Relative timeout,
6503                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6504 {
6505   struct ShutdownContext *shutdown_ctx;
6506   struct ChurnRestartContext *startup_ctx;
6507   struct ChurnContext *churn_ctx;
6508
6509   if (GNUNET_NO == desired_status)
6510     {
6511       if (NULL != pg->peers[offset].daemon)
6512         {
6513           shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6514           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6515           churn_ctx->num_to_start = 0;
6516           churn_ctx->num_to_stop = 1;
6517           churn_ctx->cb = cb;
6518           churn_ctx->cb_cls = cb_cls;
6519           shutdown_ctx->cb_cls = churn_ctx;
6520           GNUNET_TESTING_daemon_stop (pg->peers[offset].daemon, timeout,
6521                                       &churn_stop_callback, shutdown_ctx,
6522                                       GNUNET_NO, GNUNET_YES);
6523         }
6524     }
6525   else if (GNUNET_YES == desired_status)
6526     {
6527       if (NULL == pg->peers[offset].daemon)
6528         {
6529           startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6530           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6531           churn_ctx->num_to_start = 1;
6532           churn_ctx->num_to_stop = 0;
6533           churn_ctx->cb = cb;
6534           churn_ctx->cb_cls = cb_cls;
6535           startup_ctx->churn_ctx = churn_ctx;
6536           GNUNET_TESTING_daemon_start_stopped (pg->peers[offset].daemon,
6537                                                timeout, &churn_start_callback,
6538                                                startup_ctx);
6539         }
6540     }
6541   else
6542     GNUNET_break (0);
6543 }
6544
6545 /**
6546  * Callback for shutting down peers in a peer group.
6547  *
6548  * @param cls closure (struct ShutdownContext)
6549  * @param emsg NULL on success
6550  */
6551 void
6552 internal_shutdown_callback(void *cls, const char *emsg)
6553 {
6554   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6555   struct ShutdownContext *shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6556   unsigned int off;
6557   struct OutstandingSSH *ssh_pos;
6558
6559   shutdown_ctx->outstanding--;
6560   if (peer_shutdown_ctx->daemon->hostname != NULL)
6561     decrement_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6562                                    shutdown_ctx->pg);
6563
6564   if (emsg == NULL)
6565     {
6566       shutdown_ctx->peers_down++;
6567     }
6568   else
6569     {
6570       shutdown_ctx->peers_failed++;
6571     }
6572
6573   if ((shutdown_ctx->cb != NULL) && (shutdown_ctx->peers_down
6574       + shutdown_ctx->peers_failed == shutdown_ctx->total_peers))
6575     {
6576       if (shutdown_ctx->peers_failed > 0)
6577         shutdown_ctx->cb (shutdown_ctx->cb_cls,
6578                           "Not all peers successfully shut down!");
6579       else
6580         shutdown_ctx->cb (shutdown_ctx->cb_cls, NULL);
6581
6582       GNUNET_free (shutdown_ctx->pg->peers);
6583       GNUNET_free_non_null(shutdown_ctx->pg->hostkey_data);
6584       for (off = 0; off < shutdown_ctx->pg->num_hosts; off++)
6585         {
6586           GNUNET_free (shutdown_ctx->pg->hosts[off].hostname);
6587           GNUNET_free_non_null (shutdown_ctx->pg->hosts[off].username);
6588         }
6589       GNUNET_free_non_null (shutdown_ctx->pg->hosts);
6590       while (NULL != (ssh_pos = shutdown_ctx->pg->ssh_head))
6591         {
6592           GNUNET_CONTAINER_DLL_remove(shutdown_ctx->pg->ssh_head, shutdown_ctx->pg->ssh_tail, ssh_pos);
6593           GNUNET_free(ssh_pos);
6594         }
6595       GNUNET_free (shutdown_ctx->pg);
6596       GNUNET_free (shutdown_ctx);
6597     }
6598   GNUNET_free(peer_shutdown_ctx);
6599 }
6600
6601 /**
6602  * Task to rate limit the number of outstanding peer shutdown
6603  * requests.  This is necessary for making sure we don't do
6604  * too many ssh connections at once, but is generally nicer
6605  * to any system as well (graduated task starts, as opposed
6606  * to calling gnunet-arm N times all at once).
6607  */
6608 static void
6609 schedule_shutdown_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6610 {
6611   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6612   struct ShutdownContext *shutdown_ctx;
6613
6614   GNUNET_assert (peer_shutdown_ctx != NULL);
6615   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6616   GNUNET_assert (shutdown_ctx != NULL);
6617
6618   if ((shutdown_ctx->outstanding < shutdown_ctx->pg->max_concurrent_ssh)
6619       || ((peer_shutdown_ctx->daemon->hostname != NULL)
6620           && (count_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6621                                          shutdown_ctx->pg)
6622               < shutdown_ctx->pg->max_concurrent_ssh)))
6623     {
6624       if (peer_shutdown_ctx->daemon->hostname != NULL)
6625         increment_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6626                                        shutdown_ctx->pg);
6627       shutdown_ctx->outstanding++;
6628       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6629                                   shutdown_ctx->timeout,
6630                                   &internal_shutdown_callback, peer_shutdown_ctx,
6631                                   GNUNET_YES, GNUNET_NO);
6632     }
6633   else
6634     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
6635                                                                  100),
6636                                   &schedule_shutdown_task, peer_shutdown_ctx);
6637
6638 }
6639
6640 /**
6641  * Shutdown all peers started in the given group.
6642  *
6643  * @param pg handle to the peer group
6644  * @param timeout how long to wait for shutdown
6645  * @param cb callback to notify upon success or failure
6646  * @param cb_cls closure for cb
6647  */
6648 void
6649 GNUNET_TESTING_daemons_stop(struct GNUNET_TESTING_PeerGroup *pg,
6650                             struct GNUNET_TIME_Relative timeout,
6651                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6652 {
6653   unsigned int off;
6654   struct ShutdownContext *shutdown_ctx;
6655   struct PeerShutdownContext *peer_shutdown_ctx;
6656 #if OLD
6657   struct PeerConnection *conn_iter;
6658   struct PeerConnection *temp_conn;
6659 #endif
6660
6661   GNUNET_assert (pg->total > 0);
6662
6663   shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6664   shutdown_ctx->cb = cb;
6665   shutdown_ctx->cb_cls = cb_cls;
6666   shutdown_ctx->total_peers = pg->total;
6667   shutdown_ctx->timeout = timeout;
6668   shutdown_ctx->pg = pg;
6669   /* shtudown_ctx->outstanding = 0; */
6670
6671   for (off = 0; off < pg->total; off++)
6672     {
6673       GNUNET_assert (NULL != pg->peers[off].daemon);
6674       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6675       peer_shutdown_ctx->daemon = pg->peers[off].daemon;
6676       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6677       GNUNET_SCHEDULER_add_now (&schedule_shutdown_task, peer_shutdown_ctx);
6678
6679       if (NULL != pg->peers[off].cfg)
6680       {
6681         GNUNET_CONFIGURATION_destroy (pg->peers[off].cfg);
6682         pg->peers[off].cfg = NULL;
6683       }
6684 #if OLD
6685       conn_iter = pg->peers[off].allowed_peers_head;
6686       while (conn_iter != NULL)
6687         {
6688           temp_conn = conn_iter->next;
6689           GNUNET_free(conn_iter);
6690           conn_iter = temp_conn;
6691         }
6692
6693       conn_iter = pg->peers[off].connect_peers_head;
6694       while (conn_iter != NULL)
6695         {
6696           temp_conn = conn_iter->next;
6697           GNUNET_free(conn_iter);
6698           conn_iter = temp_conn;
6699         }
6700
6701       conn_iter = pg->peers[off].blacklisted_peers_head;
6702       while (conn_iter != NULL)
6703         {
6704           temp_conn = conn_iter->next;
6705           GNUNET_free(conn_iter);
6706           conn_iter = temp_conn;
6707         }
6708
6709       conn_iter = pg->peers[off].connect_peers_working_set_head;
6710       while (conn_iter != NULL)
6711         {
6712           temp_conn = conn_iter->next;
6713           GNUNET_free(conn_iter);
6714           conn_iter = temp_conn;
6715         }
6716 #else
6717       if (pg->peers[off].allowed_peers != NULL)
6718       GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].allowed_peers);
6719       if (pg->peers[off].connect_peers != NULL)
6720       GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].connect_peers);
6721       if (pg->peers[off].blacklisted_peers != NULL)
6722       GNUNET_CONTAINER_multihashmap_destroy (pg->
6723           peers[off].blacklisted_peers);
6724 #endif
6725     }
6726 }
6727
6728 /* end of testing_group.c */