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_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1414                                              "YES");
1415       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1416                                              "YES");
1417       GNUNET_free_non_null (control_host);
1418       GNUNET_free (allowed_hosts);
1419     }
1420
1421   /* arm needs to know to allow connections from the host on which it is running,
1422    * otherwise gnunet-arm is unable to connect to it in some instances */
1423   if (hostname != NULL)
1424     {
1425       GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1;", hostname);
1426       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1427                                              hostname);
1428       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1429                                              hostname);
1430       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1431                                              "YES");
1432       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1433                                              "YES");
1434       GNUNET_CONFIGURATION_set_value_string (uc.ret, "arm", "ACCEPT_FROM",
1435                                              allowed_hosts);
1436       GNUNET_free (allowed_hosts);
1437     }
1438   else
1439     {
1440       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1441                                              "127.0.0.1");
1442       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1443                                              "127.0.0.1");
1444       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1445                                              "YES");
1446       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1447                                              "YES");
1448     }
1449
1450   *port = (uint16_t) uc.nport;
1451   *upnum = uc.upnum;
1452   uc.fdnum++;
1453   *fdnum = uc.fdnum;
1454   return uc.ret;
1455 }
1456
1457 /*
1458  * Remove entries from the peer connection list
1459  *
1460  * @param pg the peer group we are working with
1461  * @param first index of the first peer
1462  * @param second index of the second peer
1463  * @param list the peer list to use
1464  * @param check UNUSED
1465  *
1466  * @return the number of connections added (can be 0, 1 or 2)
1467  *
1468  */
1469 static unsigned int
1470 remove_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1471                    unsigned int second, enum PeerLists list, unsigned int check)
1472 {
1473   int removed;
1474 #if OLD
1475   struct PeerConnection **first_list;
1476   struct PeerConnection **second_list;
1477   struct PeerConnection *first_iter;
1478   struct PeerConnection *second_iter;
1479   struct PeerConnection **first_tail;
1480   struct PeerConnection **second_tail;
1481
1482 #else
1483   GNUNET_HashCode hash_first;
1484   GNUNET_HashCode hash_second;
1485
1486   hash_from_uid (first, &hash_first);
1487   hash_from_uid (second, &hash_second);
1488 #endif
1489
1490   removed = 0;
1491 #if OLD
1492   switch (list)
1493     {
1494   case ALLOWED:
1495     first_list = &pg->peers[first].allowed_peers_head;
1496     second_list = &pg->peers[second].allowed_peers_head;
1497     first_tail = &pg->peers[first].allowed_peers_tail;
1498     second_tail = &pg->peers[second].allowed_peers_tail;
1499     break;
1500   case CONNECT:
1501     first_list = &pg->peers[first].connect_peers_head;
1502     second_list = &pg->peers[second].connect_peers_head;
1503     first_tail = &pg->peers[first].connect_peers_tail;
1504     second_tail = &pg->peers[second].connect_peers_tail;
1505     break;
1506   case BLACKLIST:
1507     first_list = &pg->peers[first].blacklisted_peers_head;
1508     second_list = &pg->peers[second].blacklisted_peers_head;
1509     first_tail = &pg->peers[first].blacklisted_peers_tail;
1510     second_tail = &pg->peers[second].blacklisted_peers_tail;
1511     break;
1512   case WORKING_SET:
1513     first_list = &pg->peers[first].connect_peers_working_set_head;
1514     second_list = &pg->peers[second].connect_peers_working_set_head;
1515     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1516     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1517     break;
1518   default:
1519     GNUNET_break(0);
1520     return 0;
1521     }
1522
1523   first_iter = *first_list;
1524   while (first_iter != NULL)
1525     {
1526       if (first_iter->index == second)
1527         {
1528           GNUNET_CONTAINER_DLL_remove(*first_list, *first_tail, first_iter);
1529           GNUNET_free(first_iter);
1530           removed++;
1531           break;
1532         }
1533       first_iter = first_iter->next;
1534     }
1535
1536   second_iter = *second_list;
1537   while (second_iter != NULL)
1538     {
1539       if (second_iter->index == first)
1540         {
1541           GNUNET_CONTAINER_DLL_remove(*second_list, *second_tail, second_iter);
1542           GNUNET_free(second_iter);
1543           removed++;
1544           break;
1545         }
1546       second_iter = second_iter->next;
1547     }
1548 #else
1549   if (GNUNET_YES ==
1550       GNUNET_CONTAINER_multihashmap_contains (pg->peers[first].blacklisted_peers,
1551           &hash_second))
1552     {
1553       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[first].blacklisted_peers,
1554           &hash_second);
1555     }
1556
1557   if (GNUNET_YES ==
1558       GNUNET_CONTAINER_multihashmap_contains (pg->peers[second].blacklisted_peers,
1559           &hash_first))
1560     {
1561       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[second].blacklisted_peers,
1562           &hash_first);
1563     }
1564 #endif
1565
1566   return removed;
1567 }
1568
1569 /*
1570  * Add entries to the some list
1571  *
1572  * @param pg the peer group we are working with
1573  * @param first index of the first peer
1574  * @param second index of the second peer
1575  * @param list the list type that we should modify
1576  * @param check GNUNET_YES to check lists before adding
1577  *              GNUNET_NO to force add
1578  *
1579  * @return the number of connections added (can be 0, 1 or 2)
1580  *
1581  */
1582 static unsigned int
1583 add_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1584                 unsigned int second, enum PeerLists list, unsigned int check)
1585 {
1586   int added;
1587   int add_first;
1588   int add_second;
1589
1590   struct PeerConnection **first_list;
1591   struct PeerConnection **second_list;
1592   struct PeerConnection *first_iter;
1593   struct PeerConnection *second_iter;
1594   struct PeerConnection *new_first;
1595   struct PeerConnection *new_second;
1596   struct PeerConnection **first_tail;
1597   struct PeerConnection **second_tail;
1598
1599   switch (list)
1600     {
1601   case ALLOWED:
1602     first_list = &pg->peers[first].allowed_peers_head;
1603     second_list = &pg->peers[second].allowed_peers_head;
1604     first_tail = &pg->peers[first].allowed_peers_tail;
1605     second_tail = &pg->peers[second].allowed_peers_tail;
1606     break;
1607   case CONNECT:
1608     first_list = &pg->peers[first].connect_peers_head;
1609     second_list = &pg->peers[second].connect_peers_head;
1610     first_tail = &pg->peers[first].connect_peers_tail;
1611     second_tail = &pg->peers[second].connect_peers_tail;
1612     break;
1613   case BLACKLIST:
1614     first_list = &pg->peers[first].blacklisted_peers_head;
1615     second_list = &pg->peers[second].blacklisted_peers_head;
1616     first_tail = &pg->peers[first].blacklisted_peers_tail;
1617     second_tail = &pg->peers[second].blacklisted_peers_tail;
1618     break;
1619   case WORKING_SET:
1620     first_list = &pg->peers[first].connect_peers_working_set_head;
1621     second_list = &pg->peers[second].connect_peers_working_set_head;
1622     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1623     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1624     break;
1625   default:
1626     GNUNET_break(0);
1627     return 0;
1628     }
1629
1630   add_first = GNUNET_YES;
1631   add_second = GNUNET_YES;
1632
1633   if (check == GNUNET_YES)
1634     {
1635       first_iter = *first_list;
1636       while (first_iter != NULL)
1637         {
1638           if (first_iter->index == second)
1639             {
1640               add_first = GNUNET_NO;
1641               break;
1642             }
1643           first_iter = first_iter->next;
1644         }
1645
1646       second_iter = *second_list;
1647       while (second_iter != NULL)
1648         {
1649           if (second_iter->index == first)
1650             {
1651               add_second = GNUNET_NO;
1652               break;
1653             }
1654           second_iter = second_iter->next;
1655         }
1656     }
1657
1658   added = 0;
1659   if (add_first)
1660     {
1661       new_first = GNUNET_malloc (sizeof (struct PeerConnection));
1662       new_first->index = second;
1663       GNUNET_CONTAINER_DLL_insert(*first_list, *first_tail, new_first);
1664       pg->peers[first].num_connections++;
1665       added++;
1666     }
1667
1668   if (add_second)
1669     {
1670       new_second = GNUNET_malloc (sizeof (struct PeerConnection));
1671       new_second->index = first;
1672       GNUNET_CONTAINER_DLL_insert(*second_list, *second_tail, new_second);
1673       pg->peers[second].num_connections++;
1674       added++;
1675     }
1676
1677   return added;
1678 }
1679
1680 /**
1681  * Scale free network construction as described in:
1682  *
1683  * "Emergence of Scaling in Random Networks." Science 286, 509-512, 1999.
1684  *
1685  * Start with a network of "one" peer, then progressively add
1686  * peers up to the total number.  At each step, iterate over
1687  * all possible peers and connect new peer based on number of
1688  * existing connections of the target peer.
1689  *
1690  * @param pg the peer group we are dealing with
1691  * @param proc the connection processor to use
1692  * @param list the peer list to use
1693  *
1694  * @return the number of connections created
1695  */
1696 static unsigned int
1697 create_scale_free(struct GNUNET_TESTING_PeerGroup *pg,
1698                   GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
1699 {
1700
1701   unsigned int total_connections;
1702   unsigned int outer_count;
1703   unsigned int i;
1704   unsigned int previous_total_connections;
1705   double random;
1706   double probability;
1707
1708   GNUNET_assert (pg->total > 1);
1709
1710   /* Add a connection between the first two nodes */
1711   total_connections = proc (pg, 0, 1, list, GNUNET_YES);
1712
1713   for (outer_count = 1; outer_count < pg->total; outer_count++)
1714     {
1715       previous_total_connections = total_connections;
1716       for (i = 0; i < outer_count; i++)
1717         {
1718           probability = pg->peers[i].num_connections
1719               / (double) previous_total_connections;
1720           random
1721               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1722                                                     UINT64_MAX))
1723                   / ((double) UINT64_MAX);
1724 #if VERBOSE_TESTING
1725           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1726               "Considering connecting peer %d to peer %d\n",
1727               outer_count, i);
1728 #endif
1729           if (random < probability)
1730             {
1731 #if VERBOSE_TESTING
1732               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1733                   "Connecting peer %d to peer %d\n", outer_count, i);
1734 #endif
1735               total_connections += proc (pg, outer_count, i, list, GNUNET_YES);
1736             }
1737         }
1738     }
1739
1740   return total_connections;
1741 }
1742
1743 /**
1744  * Create a topology given a peer group (set of running peers)
1745  * and a connection processor.  Creates a small world topology
1746  * according to the rewired ring construction.  The basic
1747  * behavior is that a ring topology is created, but with some
1748  * probability instead of connecting a peer to the next
1749  * neighbor in the ring a connection will be created to a peer
1750  * selected uniformly at random.   We use the TESTING
1751  * PERCENTAGE option to specify what number of
1752  * connections each peer should have.  Default is 2,
1753  * which makes the ring, any given number is multiplied by
1754  * the log of the network size; i.e. a PERCENTAGE of 2 makes
1755  * each peer have on average 2logn connections.  The additional
1756  * connections are made at increasing distance around the ring
1757  * from the original peer, or to random peers based on the re-
1758  * wiring probability. The TESTING
1759  * PROBABILITY option is used as the probability that a given
1760  * connection is rewired.
1761  *
1762  * @param pg the peergroup to create the topology on
1763  * @param proc the connection processor to call to actually set
1764  *        up connections between two peers
1765  * @param list the peer list to use
1766  *
1767  * @return the number of connections that were set up
1768  *
1769  */
1770 static unsigned int
1771 create_small_world_ring(struct GNUNET_TESTING_PeerGroup *pg,
1772                         GNUNET_TESTING_ConnectionProcessor proc,
1773                         enum PeerLists list)
1774 {
1775   unsigned int i, j;
1776   int nodeToConnect;
1777   unsigned int natLog;
1778   unsigned int randomPeer;
1779   double random, logNModifier, probability;
1780   unsigned int smallWorldConnections;
1781   int connsPerPeer;
1782   char *p_string;
1783   int max;
1784   int min;
1785   unsigned int useAnd;
1786   int connect_attempts;
1787
1788   logNModifier = 0.5; /* FIXME: default value? */
1789   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1790                                                           "PERCENTAGE",
1791                                                           &p_string))
1792     {
1793       if (sscanf (p_string, "%lf", &logNModifier) != 1)
1794         GNUNET_log (
1795                     GNUNET_ERROR_TYPE_WARNING,
1796                     _
1797                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1798                     p_string, "LOGNMODIFIER", "TESTING");
1799       GNUNET_free (p_string);
1800     }
1801   probability = 0.5; /* FIXME: default percentage? */
1802   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1803                                                           "PROBABILITY",
1804                                                           &p_string))
1805     {
1806       if (sscanf (p_string, "%lf", &probability) != 1)
1807         GNUNET_log (
1808                     GNUNET_ERROR_TYPE_WARNING,
1809                     _
1810                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1811                     p_string, "PERCENTAGE", "TESTING");
1812       GNUNET_free (p_string);
1813     }
1814   natLog = log (pg->total);
1815   connsPerPeer = ceil (natLog * logNModifier);
1816
1817   if (connsPerPeer % 2 == 1)
1818     connsPerPeer += 1;
1819
1820   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Target is %d connections per peer."),
1821               connsPerPeer);
1822
1823   smallWorldConnections = 0;
1824   connect_attempts = 0;
1825   for (i = 0; i < pg->total; i++)
1826     {
1827       useAnd = 0;
1828       max = i + connsPerPeer / 2;
1829       min = i - connsPerPeer / 2;
1830
1831       if (max > pg->total - 1)
1832         {
1833           max = max - pg->total;
1834           useAnd = 1;
1835         }
1836
1837       if (min < 0)
1838         {
1839           min = pg->total - 1 + min;
1840           useAnd = 1;
1841         }
1842
1843       for (j = 0; j < connsPerPeer / 2; j++)
1844         {
1845           random
1846               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1847                                                     UINT64_MAX)
1848                   / ((double) UINT64_MAX));
1849           if (random < probability)
1850             {
1851               /* Connect to uniformly selected random peer */
1852               randomPeer
1853                   = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1854                                               pg->total);
1855               while ((((randomPeer < max) && (randomPeer > min)) && (useAnd
1856                   == 0)) || (((randomPeer > min) || (randomPeer < max))
1857                   && (useAnd == 1)))
1858                 {
1859                   randomPeer
1860                       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1861                                                   pg->total);
1862                 }
1863               smallWorldConnections += proc (pg, i, randomPeer, list,
1864                                              GNUNET_YES);
1865             }
1866           else
1867             {
1868               nodeToConnect = i + j + 1;
1869               if (nodeToConnect > pg->total - 1)
1870                 {
1871                   nodeToConnect = nodeToConnect - pg->total;
1872                 }
1873               connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
1874             }
1875         }
1876
1877     }
1878
1879   connect_attempts += smallWorldConnections;
1880
1881   return connect_attempts;
1882 }
1883
1884 /**
1885  * Create a topology given a peer group (set of running peers)
1886  * and a connection processor.
1887  *
1888  * @param pg the peergroup to create the topology on
1889  * @param proc the connection processor to call to actually set
1890  *        up connections between two peers
1891  * @param list the peer list to use
1892  *
1893  * @return the number of connections that were set up
1894  *
1895  */
1896 static unsigned int
1897 create_nated_internet(struct GNUNET_TESTING_PeerGroup *pg,
1898                       GNUNET_TESTING_ConnectionProcessor proc,
1899                       enum PeerLists list)
1900 {
1901   unsigned int outer_count, inner_count;
1902   unsigned int cutoff;
1903   int connect_attempts;
1904   double nat_percentage;
1905   char *p_string;
1906
1907   nat_percentage = 0.6; /* FIXME: default percentage? */
1908   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1909                                                           "PERCENTAGE",
1910                                                           &p_string))
1911     {
1912       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1913         GNUNET_log (
1914                     GNUNET_ERROR_TYPE_WARNING,
1915                     _
1916                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1917                     p_string, "PERCENTAGE", "TESTING");
1918       GNUNET_free (p_string);
1919     }
1920
1921   cutoff = (unsigned int) (nat_percentage * pg->total);
1922   connect_attempts = 0;
1923   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1924     {
1925       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1926         {
1927           if ((outer_count > cutoff) || (inner_count > cutoff))
1928             {
1929 #if VERBOSE_TESTING
1930               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1931                   "Connecting peer %d to peer %d\n",
1932                   outer_count, inner_count);
1933 #endif
1934               connect_attempts += proc (pg, outer_count, inner_count, list,
1935                                         GNUNET_YES);
1936             }
1937         }
1938     }
1939   return connect_attempts;
1940 }
1941
1942 #if TOPOLOGY_HACK
1943 /**
1944  * Create a topology given a peer group (set of running peers)
1945  * and a connection processor.
1946  *
1947  * @param pg the peergroup to create the topology on
1948  * @param proc the connection processor to call to actually set
1949  *        up connections between two peers
1950  * @param list the peer list to use
1951  *
1952  * @return the number of connections that were set up
1953  *
1954  */
1955 static unsigned int
1956 create_nated_internet_copy(struct GNUNET_TESTING_PeerGroup *pg,
1957                            GNUNET_TESTING_ConnectionProcessor proc,
1958                            enum PeerLists list)
1959 {
1960   unsigned int outer_count, inner_count;
1961   unsigned int cutoff;
1962   int connect_attempts;
1963   double nat_percentage;
1964   char *p_string;
1965   unsigned int count;
1966   struct ProgressMeter *conn_meter;
1967
1968   nat_percentage = 0.6; /* FIXME: default percentage? */
1969   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1970                                                           "PERCENTAGE",
1971                                                           &p_string))
1972     {
1973       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1974         GNUNET_log (
1975                     GNUNET_ERROR_TYPE_WARNING,
1976                     _
1977                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1978                     p_string, "PERCENTAGE", "TESTING");
1979       GNUNET_free (p_string);
1980     }
1981
1982   cutoff = (unsigned int) (nat_percentage * pg->total);
1983   count = 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               count++;
1991             }
1992         }
1993     }
1994   conn_meter = create_meter (count, "NAT COPY", GNUNET_YES);
1995   connect_attempts = 0;
1996   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1997     {
1998       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1999         {
2000           if ((outer_count > cutoff) || (inner_count > cutoff))
2001             {
2002 #if VERBOSE_TESTING
2003               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2004                   "Connecting peer %d to peer %d\n",
2005                   outer_count, inner_count);
2006 #endif
2007               connect_attempts += proc (pg, outer_count, inner_count, list,
2008                                         GNUNET_YES);
2009               add_connections (pg, outer_count, inner_count, ALLOWED, GNUNET_NO);
2010               update_meter (conn_meter);
2011             }
2012         }
2013     }
2014   free_meter (conn_meter);
2015
2016   return connect_attempts;
2017 }
2018 #endif
2019
2020 /**
2021  * Create a topology given a peer group (set of running peers)
2022  * and a connection processor.
2023  *
2024  * @param pg the peergroup to create the topology on
2025  * @param proc the connection processor to call to actually set
2026  *        up connections between two peers
2027  * @param list the peer list to use
2028  *
2029  * @return the number of connections that were set up
2030  *
2031  */
2032 static unsigned int
2033 create_small_world(struct GNUNET_TESTING_PeerGroup *pg,
2034                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2035 {
2036   unsigned int i, j, k;
2037   unsigned int square;
2038   unsigned int rows;
2039   unsigned int cols;
2040   unsigned int toggle = 1;
2041   unsigned int nodeToConnect;
2042   unsigned int natLog;
2043   unsigned int node1Row;
2044   unsigned int node1Col;
2045   unsigned int node2Row;
2046   unsigned int node2Col;
2047   unsigned int distance;
2048   double probability, random, percentage;
2049   unsigned int smallWorldConnections;
2050   unsigned int small_world_it;
2051   char *p_string;
2052   int connect_attempts;
2053   square = floor (sqrt (pg->total));
2054   rows = square;
2055   cols = square;
2056
2057   percentage = 0.5; /* FIXME: default percentage? */
2058   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2059                                                           "PERCENTAGE",
2060                                                           &p_string))
2061     {
2062       if (sscanf (p_string, "%lf", &percentage) != 1)
2063         GNUNET_log (
2064                     GNUNET_ERROR_TYPE_WARNING,
2065                     _
2066                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2067                     p_string, "PERCENTAGE", "TESTING");
2068       GNUNET_free (p_string);
2069     }
2070   if (percentage < 0.0)
2071     {
2072       GNUNET_log (
2073                   GNUNET_ERROR_TYPE_WARNING,
2074                   _
2075                   ("Invalid value `%s' for option `%s' in section `%s': got %f, needed value greater than 0\n"),
2076                   "PERCENTAGE", "TESTING", percentage);
2077       percentage = 0.5;
2078     }
2079   probability = 0.5; /* FIXME: default percentage? */
2080   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2081                                                           "PROBABILITY",
2082                                                           &p_string))
2083     {
2084       if (sscanf (p_string, "%lf", &probability) != 1)
2085         GNUNET_log (
2086                     GNUNET_ERROR_TYPE_WARNING,
2087                     _
2088                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2089                     p_string, "PROBABILITY", "TESTING");
2090       GNUNET_free (p_string);
2091     }
2092   if (square * square != pg->total)
2093     {
2094       while (rows * cols < pg->total)
2095         {
2096           if (toggle % 2 == 0)
2097             rows++;
2098           else
2099             cols++;
2100
2101           toggle++;
2102         }
2103     }
2104 #if VERBOSE_TESTING
2105   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2106       _
2107       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2108       rows, cols);
2109 #endif
2110
2111   connect_attempts = 0;
2112   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2113    * to the node to its right and above.  Once this is over, we'll have our torus!
2114    * Special case for the last node (if the rows and columns are not equal), connect
2115    * to the first in the row to maintain topology.
2116    */
2117   for (i = 0; i < pg->total; i++)
2118     {
2119       /* First connect to the node to the right */
2120       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2121         nodeToConnect = i + 1;
2122       else if (i + 1 == pg->total)
2123         nodeToConnect = rows * cols - cols;
2124       else
2125         nodeToConnect = i - cols + 1;
2126
2127       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2128
2129       if (i < cols)
2130         {
2131           nodeToConnect = (rows * cols) - cols + i;
2132           if (nodeToConnect >= pg->total)
2133             nodeToConnect -= cols;
2134         }
2135       else
2136         nodeToConnect = i - cols;
2137
2138       if (nodeToConnect < pg->total)
2139         connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2140     }
2141   natLog = log (pg->total);
2142 #if VERBOSE_TESTING > 2
2143   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2144       _("natural log of %d is %d, will run %d iterations\n"),
2145       pg->total, natLog, (int) (natLog * percentage));
2146   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2147       _("Total connections added thus far: %u!\n"), connect_attempts);
2148 #endif
2149   smallWorldConnections = 0;
2150   small_world_it = (unsigned int) (natLog * percentage);
2151   if (small_world_it < 1)
2152     small_world_it = 1;
2153   GNUNET_assert (small_world_it > 0 && small_world_it < (unsigned int) -1);
2154   for (i = 0; i < small_world_it; i++)
2155     {
2156       for (j = 0; j < pg->total; j++)
2157         {
2158           /* Determine the row and column of node at position j on the 2d torus */
2159           node1Row = j / cols;
2160           node1Col = j - (node1Row * cols);
2161           for (k = 0; k < pg->total; k++)
2162             {
2163               /* Determine the row and column of node at position k on the 2d torus */
2164               node2Row = k / cols;
2165               node2Col = k - (node2Row * cols);
2166               /* Simple Cartesian distance */
2167               distance = abs (node1Row - node2Row) + abs (node1Col - node2Col);
2168               if (distance > 1)
2169                 {
2170                   /* Calculate probability as 1 over the square of the distance */
2171                   probability = 1.0 / (distance * distance);
2172                   /* Choose a random value between 0 and 1 */
2173                   random
2174                       = ((double) GNUNET_CRYPTO_random_u64 (
2175                                                             GNUNET_CRYPTO_QUALITY_WEAK,
2176                                                             UINT64_MAX))
2177                           / ((double) UINT64_MAX);
2178                   /* If random < probability, then connect the two nodes */
2179                   if (random < probability)
2180                     smallWorldConnections += proc (pg, j, k, list, GNUNET_YES);
2181
2182                 }
2183             }
2184         }
2185     }
2186   connect_attempts += smallWorldConnections;
2187 #if VERBOSE_TESTING > 2
2188   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2189       _("Total connections added for small world: %d!\n"),
2190       smallWorldConnections);
2191 #endif
2192   return connect_attempts;
2193 }
2194
2195 /**
2196  * Create a topology given a peer group (set of running peers)
2197  * and a connection processor.
2198  *
2199  * @param pg the peergroup to create the topology on
2200  * @param proc the connection processor to call to actually set
2201  *        up connections between two peers
2202  * @param list the peer list to use
2203  *
2204  * @return the number of connections that were set up
2205  *
2206  */
2207 static unsigned int
2208 create_erdos_renyi(struct GNUNET_TESTING_PeerGroup *pg,
2209                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2210 {
2211   double temp_rand;
2212   unsigned int outer_count;
2213   unsigned int inner_count;
2214   int connect_attempts;
2215   double probability;
2216   char *p_string;
2217
2218   probability = 0.5; /* FIXME: default percentage? */
2219   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2220                                                           "PROBABILITY",
2221                                                           &p_string))
2222     {
2223       if (sscanf (p_string, "%lf", &probability) != 1)
2224         GNUNET_log (
2225                     GNUNET_ERROR_TYPE_WARNING,
2226                     _
2227                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2228                     p_string, "PROBABILITY", "TESTING");
2229       GNUNET_free (p_string);
2230     }
2231   connect_attempts = 0;
2232   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2233     {
2234       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2235         {
2236           temp_rand
2237               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
2238                                                     UINT64_MAX))
2239                   / ((double) UINT64_MAX);
2240 #if VERBOSE_TESTING
2241           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2242               _("rand is %f probability is %f\n"), temp_rand,
2243               probability);
2244 #endif
2245           if (temp_rand < probability)
2246             {
2247               connect_attempts += proc (pg, outer_count, inner_count, list,
2248                                         GNUNET_YES);
2249             }
2250         }
2251     }
2252
2253   return connect_attempts;
2254 }
2255
2256 /**
2257  * Create a topology given a peer group (set of running peers)
2258  * and a connection processor.  This particular function creates
2259  * the connections for a 2d-torus, plus additional "closest"
2260  * connections per peer.
2261  *
2262  * @param pg the peergroup to create the topology on
2263  * @param proc the connection processor to call to actually set
2264  *        up connections between two peers
2265  * @param list the peer list to use
2266  *
2267  * @return the number of connections that were set up
2268  *
2269  */
2270 static unsigned int
2271 create_2d_torus(struct GNUNET_TESTING_PeerGroup *pg,
2272                 GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2273 {
2274   unsigned int i;
2275   unsigned int square;
2276   unsigned int rows;
2277   unsigned int cols;
2278   unsigned int toggle = 1;
2279   unsigned int nodeToConnect;
2280   int connect_attempts;
2281
2282   connect_attempts = 0;
2283
2284   square = floor (sqrt (pg->total));
2285   rows = square;
2286   cols = square;
2287
2288   if (square * square != pg->total)
2289     {
2290       while (rows * cols < pg->total)
2291         {
2292           if (toggle % 2 == 0)
2293             rows++;
2294           else
2295             cols++;
2296
2297           toggle++;
2298         }
2299     }
2300 #if VERBOSE_TESTING
2301   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2302       _
2303       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2304       rows, cols);
2305 #endif
2306   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2307    * to the node to its right and above.  Once this is over, we'll have our torus!
2308    * Special case for the last node (if the rows and columns are not equal), connect
2309    * to the first in the row to maintain topology.
2310    */
2311   for (i = 0; i < pg->total; i++)
2312     {
2313       /* First connect to the node to the right */
2314       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2315         nodeToConnect = i + 1;
2316       else if (i + 1 == pg->total)
2317         nodeToConnect = rows * cols - cols;
2318       else
2319         nodeToConnect = i - cols + 1;
2320 #if VERBOSE_TESTING
2321       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2322           "Connecting peer %d to peer %d\n", i, nodeToConnect);
2323 #endif
2324       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2325
2326       /* Second connect to the node immediately above */
2327       if (i < cols)
2328         {
2329           nodeToConnect = (rows * cols) - cols + i;
2330           if (nodeToConnect >= pg->total)
2331             nodeToConnect -= cols;
2332         }
2333       else
2334         nodeToConnect = i - cols;
2335
2336       if (nodeToConnect < pg->total)
2337         {
2338 #if VERBOSE_TESTING
2339           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2340               "Connecting peer %d to peer %d\n", i, nodeToConnect);
2341 #endif
2342           connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2343         }
2344
2345     }
2346
2347   return connect_attempts;
2348 }
2349
2350 /**
2351  * Create a topology given a peer group (set of running peers)
2352  * and a connection processor.
2353  *
2354  * @param pg the peergroup to create the topology on
2355  * @param proc the connection processor to call to actually set
2356  *        up connections between two peers
2357  * @param list the peer list to use
2358  * @param check does the connection processor need to check before
2359  *              performing an action on the list?
2360  *
2361  * @return the number of connections that were set up
2362  *
2363  */
2364 static unsigned int
2365 create_clique(struct GNUNET_TESTING_PeerGroup *pg,
2366               GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list,
2367               unsigned int check)
2368 {
2369   unsigned int outer_count;
2370   unsigned int inner_count;
2371   int connect_attempts;
2372   struct ProgressMeter *conn_meter;
2373   connect_attempts = 0;
2374
2375   conn_meter = create_meter ((((pg->total * pg->total) + pg->total) / 2)
2376       - pg->total, "Create Clique ", GNUNET_NO);
2377   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2378     {
2379       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2380         {
2381 #if VERBOSE_TESTING
2382           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2383               "Connecting peer %d to peer %d\n",
2384               outer_count, inner_count);
2385 #endif
2386           connect_attempts += proc (pg, outer_count, inner_count, list, check);
2387           update_meter (conn_meter);
2388         }
2389     }
2390   reset_meter (conn_meter);
2391   free_meter (conn_meter);
2392   return connect_attempts;
2393 }
2394
2395 #if !OLD
2396 /**
2397  * Iterator over hash map entries.
2398  *
2399  * @param cls closure the peer group
2400  * @param key the key stored in the hashmap is the
2401  *            index of the peer to connect to
2402  * @param value value in the hash map, handle to the peer daemon
2403  * @return GNUNET_YES if we should continue to
2404  *         iterate,
2405  *         GNUNET_NO if not.
2406  */
2407 static int
2408 unblacklist_iterator (void *cls,
2409     const GNUNET_HashCode * key,
2410     void *value)
2411   {
2412     struct UnblacklistContext *un_ctx = cls;
2413     uint32_t second_pos;
2414
2415     uid_from_hash (key, &second_pos);
2416
2417     unblacklist_connections(un_ctx->pg, un_ctx->first_uid, second_pos);
2418
2419     return GNUNET_YES;
2420   }
2421 #endif
2422
2423 /**
2424  * Create a blacklist topology based on the allowed topology
2425  * which disallows any connections not in the allowed topology
2426  * at the transport level.
2427  *
2428  * @param pg the peergroup to create the topology on
2429  * @param proc the connection processor to call to allow
2430  *        up connections between two peers
2431  *
2432  * @return the number of connections that were set up
2433  *
2434  */
2435 static unsigned int
2436 copy_allowed(struct GNUNET_TESTING_PeerGroup *pg,
2437              GNUNET_TESTING_ConnectionProcessor proc)
2438 {
2439   unsigned int count;
2440   unsigned int total;
2441   struct PeerConnection *iter;
2442 #if !OLD
2443   struct UnblacklistContext un_ctx;
2444
2445   un_ctx.pg = pg;
2446 #endif
2447   total = 0;
2448   for (count = 0; count < pg->total - 1; count++)
2449     {
2450 #if OLD
2451       iter = pg->peers[count].allowed_peers_head;
2452       while (iter != NULL)
2453         {
2454           remove_connections (pg, count, iter->index, BLACKLIST, GNUNET_YES);
2455           //unblacklist_connections(pg, count, iter->index);
2456           iter = iter->next;
2457         }
2458 #else
2459       un_ctx.first_uid = count;
2460       total += GNUNET_CONTAINER_multihashmap_iterate(pg->peers[count].allowed_peers,
2461                                                      &unblacklist_iterator,
2462                                                      &un_ctx);
2463 #endif
2464     }
2465   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2466               "Unblacklisted %u peers\n",
2467               total);
2468   return total;
2469 }
2470
2471 /**
2472  * Create a topology given a peer group (set of running peers)
2473  * and a connection processor.
2474  *
2475  * @param pg the peergroup to create the topology on
2476  * @param proc the connection processor to call to actually set
2477  *        up connections between two peers
2478  * @param list which list should be modified
2479  *
2480  * @return the number of connections that were set up
2481  *
2482  */
2483 static unsigned int
2484 create_line(struct GNUNET_TESTING_PeerGroup *pg,
2485             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2486 {
2487   unsigned int count;
2488   unsigned int connect_attempts;
2489
2490   connect_attempts = 0;
2491   /* Connect each peer to the next highest numbered peer */
2492   for (count = 0; count < pg->total - 1; count++)
2493     {
2494 #if VERBOSE_TESTING
2495       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2496                   "Connecting peer %d to peer %d\n",
2497                   count, count + 1);
2498 #endif
2499       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2500     }
2501
2502   return connect_attempts;
2503 }
2504
2505 /**
2506  * Create a topology given a peer group (set of running peers)
2507  * and a connection processor.
2508  *
2509  * @param pg the peergroup to create the topology on
2510  * @param filename the file to read topology information from
2511  * @param proc the connection processor to call to actually set
2512  *        up connections between two peers
2513  * @param list the peer list to use
2514  *
2515  * @return the number of connections that were set up
2516  *
2517  */
2518 static unsigned int
2519 create_from_file(struct GNUNET_TESTING_PeerGroup *pg, char *filename,
2520                  GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2521 {
2522   int connect_attempts;
2523   unsigned int first_peer_index;
2524   unsigned int second_peer_index;
2525   struct stat frstat;
2526   int count;
2527   char *data;
2528   const char *buf;
2529   unsigned int total_peers;
2530   enum States curr_state;
2531
2532   connect_attempts = 0;
2533   if (GNUNET_OK != GNUNET_DISK_file_test (filename))
2534     GNUNET_DISK_fn_write (filename, NULL, 0, GNUNET_DISK_PERM_USER_READ);
2535
2536   if ((0 != STAT (filename, &frstat)) || (frstat.st_size == 0))
2537     {
2538       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2539                   "Could not open file `%s' specified for topology!", filename);
2540       return connect_attempts;
2541     }
2542
2543   data = GNUNET_malloc_large (frstat.st_size);
2544   GNUNET_assert(data != NULL);
2545   if (frstat.st_size != GNUNET_DISK_fn_read (filename, data, frstat.st_size))
2546     {
2547       GNUNET_log (
2548                   GNUNET_ERROR_TYPE_ERROR,
2549                   "Could not read file %s specified for host list, ending test!",
2550                   filename);
2551       GNUNET_free (data);
2552       return connect_attempts;
2553     }
2554
2555   buf = data;
2556   count = 0;
2557   first_peer_index = 0;
2558   /* First line should contain a single integer, specifying the number of peers */
2559   /* Each subsequent line should contain this format PEER_INDEX:OTHER_PEER_INDEX[,...] */
2560   curr_state = NUM_PEERS;
2561   while (count < frstat.st_size - 1)
2562     {
2563       if ((buf[count] == '\n') || (buf[count] == ' '))
2564         {
2565           count++;
2566           continue;
2567         }
2568
2569       switch (curr_state)
2570         {
2571         case NUM_PEERS:
2572           errno = 0;
2573           total_peers = strtoul(&buf[count], NULL, 10);
2574           if (errno != 0)
2575             {
2576               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2577                           "Failed to read number of peers from topology file!\n");
2578               GNUNET_free (data);
2579               return connect_attempts;
2580             }
2581           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2582                       "Read %u total peers in topology\n", total_peers);
2583           GNUNET_assert(total_peers == pg->total);
2584           curr_state = PEER_INDEX;
2585           while ((buf[count] != '\n') && (count < frstat.st_size - 1))
2586             count++;
2587           count++;
2588           break;
2589         case PEER_INDEX:
2590           errno = 0;
2591           first_peer_index = strtoul(&buf[count], NULL, 10);
2592           if (errno != 0)
2593             {
2594               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2595                           "Failed to read peer index from topology file!\n");
2596               GNUNET_free (data);
2597               return connect_attempts;
2598             }
2599           while ((buf[count] != ':') && (count < frstat.st_size - 1))
2600             count++;
2601           count++;
2602           curr_state = OTHER_PEER_INDEX;
2603           break;
2604         case COLON:
2605           if (1 == sscanf (&buf[count], ":"))
2606             curr_state = OTHER_PEER_INDEX;
2607           count++;
2608           break;
2609         case OTHER_PEER_INDEX:
2610           errno = 0;
2611           second_peer_index = strtoul(&buf[count], NULL, 10);
2612           if (errno != 0)
2613             {
2614               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2615                           "Failed to peer index from topology file!\n");
2616               GNUNET_free (data);
2617               return connect_attempts;
2618             }
2619           /* Assume file is written with first peer 1, but array index is 0 */
2620           connect_attempts += proc (pg, first_peer_index - 1, second_peer_index
2621                                     - 1, list, GNUNET_YES);
2622           while ((buf[count] != '\n') && (buf[count] != ',') && (count
2623                                                                  < frstat.st_size - 1))
2624             count++;
2625           if (buf[count] == '\n')
2626             {
2627               curr_state = PEER_INDEX;
2628             }
2629           else if (buf[count] != ',')
2630             {
2631               curr_state = OTHER_PEER_INDEX;
2632             }
2633           count++;
2634           break;
2635         default:
2636           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2637                       "Found bad data in topology file while in state %d!\n",
2638                       curr_state);
2639           GNUNET_break(0);
2640           GNUNET_free (data);
2641           return connect_attempts;
2642         }
2643     }
2644   GNUNET_free (data);
2645   return connect_attempts;
2646 }
2647
2648 /**
2649  * Create a topology given a peer group (set of running peers)
2650  * and a connection processor.
2651  *
2652  * @param pg the peergroup to create the topology on
2653  * @param proc the connection processor to call to actually set
2654  *        up connections between two peers
2655  * @param list the peer list to use
2656  *
2657  * @return the number of connections that were set up
2658  *
2659  */
2660 static unsigned int
2661 create_ring(struct GNUNET_TESTING_PeerGroup *pg,
2662             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2663 {
2664   unsigned int count;
2665   int connect_attempts;
2666
2667   connect_attempts = 0;
2668
2669   /* Connect each peer to the next highest numbered peer */
2670   for (count = 0; count < pg->total - 1; count++)
2671     {
2672 #if VERBOSE_TESTING
2673       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2674           "Connecting peer %d to peer %d\n", count, count + 1);
2675 #endif
2676       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2677     }
2678
2679   /* Connect the last peer to the first peer */
2680   connect_attempts += proc (pg, pg->total - 1, 0, list, GNUNET_YES);
2681
2682   return connect_attempts;
2683 }
2684
2685 #if !OLD
2686 /**
2687  * Iterator for writing friends of a peer to a file.
2688  *
2689  * @param cls closure, an open writable file handle
2690  * @param key the key the daemon was stored under
2691  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2692  *
2693  * @return GNUNET_YES to continue iteration
2694  *
2695  * TODO: Could replace friend_file_iterator and blacklist_file_iterator
2696  *       with a single file_iterator that takes a closure which contains
2697  *       the prefix to write before the peer.  Then this could be used
2698  *       for blacklisting multiple transports and writing the friend
2699  *       file.  I'm sure *someone* will complain loudly about other
2700  *       things that negate these functions even existing so no point in
2701  *       "fixing" now.
2702  */
2703 static int
2704 friend_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2705   {
2706     FILE *temp_friend_handle = cls;
2707     struct GNUNET_TESTING_Daemon *peer = value;
2708     struct GNUNET_PeerIdentity *temppeer;
2709     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2710
2711     temppeer = &peer->id;
2712     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2713     fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2714
2715     return GNUNET_YES;
2716   }
2717
2718 struct BlacklistContext
2719   {
2720     /*
2721      * The (open) file handle to write to
2722      */
2723     FILE *temp_file_handle;
2724
2725     /*
2726      * The transport that this peer will be blacklisted on.
2727      */
2728     char *transport;
2729   };
2730
2731 /**
2732  * Iterator for writing blacklist data to appropriate files.
2733  *
2734  * @param cls closure, an open writable file handle
2735  * @param key the key the daemon was stored under
2736  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2737  *
2738  * @return GNUNET_YES to continue iteration
2739  */
2740 static int
2741 blacklist_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2742   {
2743     struct BlacklistContext *blacklist_ctx = cls;
2744     struct GNUNET_TESTING_Daemon *peer = value;
2745     struct GNUNET_PeerIdentity *temppeer;
2746     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2747
2748     temppeer = &peer->id;
2749     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2750     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Writing entry %s:%s to file\n", blacklist_ctx->transport, (char *) &peer_enc);
2751     fprintf (blacklist_ctx->temp_file_handle, "%s:%s\n",
2752         blacklist_ctx->transport, (char *) &peer_enc);
2753
2754     return GNUNET_YES;
2755   }
2756 #endif
2757
2758 /*
2759  * Create the friend files based on the PeerConnection's
2760  * of each peer in the peer group, and copy the files
2761  * to the appropriate place
2762  *
2763  * @param pg the peer group we are dealing with
2764  */
2765 static int
2766 create_and_copy_friend_files(struct GNUNET_TESTING_PeerGroup *pg)
2767 {
2768   FILE *temp_friend_handle;
2769   unsigned int pg_iter;
2770   char *temp_service_path;
2771   struct GNUNET_OS_Process **procarr;
2772   char *arg;
2773   char *mytemp;
2774 #if NOT_STUPID
2775   enum GNUNET_OS_ProcessStatusType type;
2776   unsigned long return_code;
2777   int count;
2778   int max_wait = 10;
2779 #endif
2780   int ret;
2781
2782   ret = GNUNET_OK;
2783 #if OLD
2784   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2785   struct PeerConnection *conn_iter;
2786 #endif
2787   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2788   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2789     {
2790       mytemp = GNUNET_DISK_mktemp ("friends");
2791       GNUNET_assert (mytemp != NULL);
2792       temp_friend_handle = fopen (mytemp, "wt");
2793       GNUNET_assert (temp_friend_handle != NULL);
2794 #if OLD
2795       conn_iter = pg->peers[pg_iter].allowed_peers_head;
2796       while (conn_iter != NULL)
2797         {
2798           GNUNET_CRYPTO_hash_to_enc (
2799                                      &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2800                                      &peer_enc);
2801           fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2802           conn_iter = conn_iter->next;
2803         }
2804 #else
2805       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].allowed_peers,
2806           &friend_file_iterator,
2807           temp_friend_handle);
2808 #endif
2809       fclose (temp_friend_handle);
2810
2811       if (GNUNET_OK
2812           != GNUNET_CONFIGURATION_get_value_string (
2813                                                     pg->peers[pg_iter]. daemon->cfg,
2814                                                     "PATHS", "SERVICEHOME",
2815                                                     &temp_service_path))
2816         {
2817           GNUNET_log (
2818                       GNUNET_ERROR_TYPE_WARNING,
2819                       _
2820                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
2821                       "SERVICEHOME", "PATHS");
2822           if (UNLINK (mytemp) != 0)
2823             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
2824                 mytemp);
2825           GNUNET_free (mytemp);
2826           break;
2827         }
2828
2829       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
2830         {
2831           GNUNET_asprintf (&arg, "%s/friends", temp_service_path);
2832           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
2833                                                       mytemp, arg, NULL);
2834           GNUNET_assert(procarr[pg_iter] != NULL);
2835 #if VERBOSE_TESTING
2836           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2837               _("Copying file with command cp %s %s\n"), mytemp, arg);
2838 #endif
2839           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2840           GNUNET_OS_process_close (procarr[pg_iter]);
2841           GNUNET_free (arg);
2842         }
2843       else /* Remote, scp the file to the correct place */
2844         {
2845           if (NULL != pg->peers[pg_iter].daemon->username)
2846             GNUNET_asprintf (&arg, "%s@%s:%s/friends",
2847                              pg->peers[pg_iter].daemon->username,
2848                              pg->peers[pg_iter].daemon->hostname,
2849                              temp_service_path);
2850           else
2851             GNUNET_asprintf (&arg, "%s:%s/friends",
2852                              pg->peers[pg_iter].daemon->hostname,
2853                              temp_service_path);
2854           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
2855                                                       mytemp, arg, NULL);
2856           GNUNET_assert(procarr[pg_iter] != NULL);
2857           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2858           GNUNET_OS_process_close (procarr[pg_iter]);
2859           if (ret != GNUNET_OK)
2860             return ret;
2861           procarr[pg_iter] = NULL;
2862 #if VERBOSE_TESTING
2863           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2864               _("Copying file with command scp %s %s\n"), mytemp,
2865               arg);
2866 #endif
2867           GNUNET_free (arg);
2868         }
2869       GNUNET_free (temp_service_path);
2870       GNUNET_free (mytemp);
2871     }
2872
2873 #if NOT_STUPID
2874   count = 0;
2875   ret = GNUNET_SYSERR;
2876   while ((count < max_wait) && (ret != GNUNET_OK))
2877     {
2878       ret = GNUNET_OK;
2879       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2880         {
2881 #if VERBOSE_TESTING
2882           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2883               _("Checking copy status of file %d\n"), pg_iter);
2884 #endif
2885           if (procarr[pg_iter] != NULL) /* Check for already completed! */
2886             {
2887               if (GNUNET_OS_process_status
2888                   (procarr[pg_iter], &type, &return_code) != GNUNET_OK)
2889                 {
2890                   ret = GNUNET_SYSERR;
2891                 }
2892               else if ((type != GNUNET_OS_PROCESS_EXITED)
2893                   || (return_code != 0))
2894                 {
2895                   ret = GNUNET_SYSERR;
2896                 }
2897               else
2898                 {
2899                   GNUNET_OS_process_close (procarr[pg_iter]);
2900                   procarr[pg_iter] = NULL;
2901 #if VERBOSE_TESTING
2902                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2903                       _("File %d copied\n"), pg_iter);
2904 #endif
2905                 }
2906             }
2907         }
2908       count++;
2909       if (ret == GNUNET_SYSERR)
2910         {
2911           /* FIXME: why sleep here? -CG */
2912           sleep (1);
2913         }
2914     }
2915
2916 #if VERBOSE_TESTING
2917   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2918       _("Finished copying all friend files!\n"));
2919 #endif
2920 #endif
2921   GNUNET_free (procarr);
2922   return ret;
2923 }
2924
2925 /*
2926  * Create the blacklist files based on the PeerConnection's
2927  * of each peer in the peer group, and copy the files
2928  * to the appropriate place.
2929  *
2930  * @param pg the peer group we are dealing with
2931  * @param transports space delimited list of transports to blacklist
2932  */
2933 static int
2934 create_and_copy_blacklist_files(struct GNUNET_TESTING_PeerGroup *pg,
2935                                 const char *transports)
2936 {
2937   FILE *temp_file_handle;
2938   unsigned int pg_iter;
2939   char *temp_service_path;
2940   struct GNUNET_OS_Process **procarr;
2941   char *arg;
2942   char *mytemp;
2943   enum GNUNET_OS_ProcessStatusType type;
2944   unsigned long return_code;
2945   int count;
2946   int ret;
2947   int max_wait = 10;
2948   int transport_len;
2949   unsigned int i;
2950   char *pos;
2951   char *temp_transports;
2952   int entry_count;
2953 #if OLD
2954   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2955   struct PeerConnection *conn_iter;
2956 #else
2957   static struct BlacklistContext blacklist_ctx;
2958 #endif
2959
2960   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2961   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2962     {
2963       mytemp = GNUNET_DISK_mktemp ("blacklist");
2964       GNUNET_assert (mytemp != NULL);
2965       temp_file_handle = fopen (mytemp, "wt");
2966       GNUNET_assert (temp_file_handle != NULL);
2967       temp_transports = GNUNET_strdup (transports);
2968 #if !OLD
2969       blacklist_ctx.temp_file_handle = temp_file_handle;
2970 #endif
2971       transport_len = strlen (temp_transports) + 1;
2972       pos = NULL;
2973
2974       for (i = 0; i < transport_len; i++)
2975         {
2976           if ((temp_transports[i] == ' ') && (pos == NULL))
2977             continue; /* At start of string (whitespace) */
2978           else if ((temp_transports[i] == ' ') || (temp_transports[i] == '\0')) /* At end of string */
2979             {
2980               temp_transports[i] = '\0';
2981 #if OLD
2982               conn_iter = pg->peers[pg_iter].blacklisted_peers_head;
2983               while (conn_iter != NULL)
2984                 {
2985                   GNUNET_CRYPTO_hash_to_enc (
2986                                              &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2987                                              &peer_enc);
2988                   fprintf (temp_file_handle, "%s:%s\n", pos, (char *) &peer_enc);
2989                   conn_iter = conn_iter->next;
2990                   entry_count++;
2991                 }
2992 #else
2993               blacklist_ctx.transport = pos;
2994               entry_count = GNUNET_CONTAINER_multihashmap_iterate (pg->
2995                   peers
2996                   [pg_iter].blacklisted_peers,
2997                   &blacklist_file_iterator,
2998                   &blacklist_ctx);
2999 #endif
3000               pos = NULL;
3001             } /* At beginning of actual string */
3002           else if (pos == NULL)
3003             {
3004               pos = &temp_transports[i];
3005             }
3006         }
3007
3008       GNUNET_free (temp_transports);
3009       fclose (temp_file_handle);
3010
3011       if (GNUNET_OK
3012           != GNUNET_CONFIGURATION_get_value_string (
3013                                                     pg->peers[pg_iter]. daemon->cfg,
3014                                                     "PATHS", "SERVICEHOME",
3015                                                     &temp_service_path))
3016         {
3017           GNUNET_log (
3018                       GNUNET_ERROR_TYPE_WARNING,
3019                       _
3020                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
3021                       "SERVICEHOME", "PATHS");
3022           if (UNLINK (mytemp) != 0)
3023             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
3024                 mytemp);
3025           GNUNET_free (mytemp);
3026           break;
3027         }
3028
3029       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
3030         {
3031           GNUNET_asprintf (&arg, "%s/blacklist", temp_service_path);
3032           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
3033                                                       mytemp, arg, NULL);
3034 #if VERBOSE_TESTING
3035           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3036               _("Copying file with command cp %s %s\n"), mytemp, arg);
3037 #endif
3038
3039           GNUNET_free (arg);
3040         }
3041       else /* Remote, scp the file to the correct place */
3042         {
3043           if (NULL != pg->peers[pg_iter].daemon->username)
3044             GNUNET_asprintf (&arg, "%s@%s:%s/blacklist",
3045                              pg->peers[pg_iter].daemon->username,
3046                              pg->peers[pg_iter].daemon->hostname,
3047                              temp_service_path);
3048           else
3049             GNUNET_asprintf (&arg, "%s:%s/blacklist",
3050                              pg->peers[pg_iter].daemon->hostname,
3051                              temp_service_path);
3052           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
3053                                                       mytemp, arg, NULL);
3054           GNUNET_assert(procarr[pg_iter] != NULL);
3055           GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: add scheduled blacklist file copy that parallelizes file copying! */
3056
3057 #if VERBOSE_TESTING
3058           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3059               _("Copying file with command scp %s %s\n"), mytemp,
3060               arg);
3061 #endif
3062           GNUNET_free (arg);
3063         }
3064       GNUNET_free (temp_service_path);
3065       GNUNET_free (mytemp);
3066     }
3067
3068   count = 0;
3069   ret = GNUNET_SYSERR;
3070   while ((count < max_wait) && (ret != GNUNET_OK))
3071     {
3072       ret = GNUNET_OK;
3073       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3074         {
3075 #if VERBOSE_TESTING
3076           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3077               _("Checking copy status of file %d\n"), pg_iter);
3078 #endif
3079           if (procarr[pg_iter] != NULL) /* Check for already completed! */
3080             {
3081               if (GNUNET_OS_process_status (procarr[pg_iter], &type,
3082                                             &return_code) != GNUNET_OK)
3083                 {
3084                   ret = GNUNET_SYSERR;
3085                 }
3086               else if ((type != GNUNET_OS_PROCESS_EXITED) || (return_code != 0))
3087                 {
3088                   ret = GNUNET_SYSERR;
3089                 }
3090               else
3091                 {
3092                   GNUNET_OS_process_close (procarr[pg_iter]);
3093                   procarr[pg_iter] = NULL;
3094 #if VERBOSE_TESTING
3095                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3096                       _("File %d copied\n"), pg_iter);
3097 #endif
3098                 }
3099             }
3100         }
3101       count++;
3102       if (ret == GNUNET_SYSERR)
3103         {
3104           /* FIXME: why sleep here? -CG */
3105           sleep (1);
3106         }
3107     }
3108
3109 #if VERBOSE_TESTING
3110   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3111       _("Finished copying all blacklist files!\n"));
3112 #endif
3113   GNUNET_free (procarr);
3114   return ret;
3115 }
3116
3117 /* Forward Declaration */
3118 static void
3119 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3120
3121 /**
3122  * Choose a random peer's next connection to create, and
3123  * call schedule_connect to set up the connect task.
3124  *
3125  * @param ct_ctx the overall connection context
3126  */
3127 static void
3128 preschedule_connect(struct GNUNET_TESTING_PeerGroup *pg)
3129 {
3130   struct ConnectTopologyContext *ct_ctx = &pg->ct_ctx;
3131   struct PeerConnection *connection_iter;
3132   struct ConnectContext *connect_context;
3133   uint32_t random_peer;
3134
3135   if (ct_ctx->remaining_connections == 0)
3136     return;
3137   random_peer
3138       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, pg->total);
3139   while (pg->peers[random_peer].connect_peers_head == NULL)
3140     random_peer = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3141                                             pg->total);
3142
3143   connection_iter = pg->peers[random_peer].connect_peers_head;
3144   connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3145   connect_context->first_index = random_peer;
3146   connect_context->second_index = connection_iter->index;
3147   connect_context->ct_ctx = ct_ctx;
3148   GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3149   GNUNET_CONTAINER_DLL_remove(pg->peers[random_peer].connect_peers_head, pg->peers[random_peer].connect_peers_tail, connection_iter);
3150   GNUNET_free(connection_iter);
3151   ct_ctx->remaining_connections--;
3152 }
3153
3154 #if USE_SEND_HELLOS
3155 /* Forward declaration */
3156 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3157
3158 /**
3159  * Close connections and free the hello context.
3160  *
3161  * @param cls the 'struct SendHelloContext *'
3162  * @param tc scheduler context
3163  */
3164 static void
3165 free_hello_context (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3166   {
3167     struct SendHelloContext *send_hello_context = cls;
3168     if (send_hello_context->peer->daemon->server != NULL)
3169       {
3170         GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3171         send_hello_context->peer->daemon->server = NULL;
3172       }
3173     if (send_hello_context->peer->daemon->th != NULL)
3174       {
3175         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3176         send_hello_context->peer->daemon->th = NULL;
3177       }
3178     if (send_hello_context->core_connect_task != GNUNET_SCHEDULER_NO_TASK)
3179       {
3180         GNUNET_SCHEDULER_cancel(send_hello_context->core_connect_task);
3181         send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3182       }
3183     send_hello_context->pg->outstanding_connects--;
3184     GNUNET_free(send_hello_context);
3185   }
3186
3187 /**
3188  * For peers that haven't yet connected, notify
3189  * the caller that they have failed (timeout).
3190  *
3191  * @param cls the 'struct SendHelloContext *'
3192  * @param tc scheduler context
3193  */
3194 static void
3195 notify_remaining_connections_failed (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3196   {
3197     struct SendHelloContext *send_hello_context = cls;
3198     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3199     struct PeerConnection *connection;
3200
3201     GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3202     send_hello_context->peer->daemon->server = NULL;
3203
3204     connection = send_hello_context->peer->connect_peers_head;
3205
3206     while (connection != NULL)
3207       {
3208         if (pg->notify_connection != NULL)
3209           {
3210             pg->notify_connection(pg->notify_connection_cls,
3211                 &send_hello_context->peer->daemon->id,
3212                 &pg->peers[connection->index].daemon->id,
3213                 0, /* FIXME */
3214                 send_hello_context->peer->daemon->cfg,
3215                 pg->peers[connection->index].daemon->cfg,
3216                 send_hello_context->peer->daemon,
3217                 pg->peers[connection->index].daemon,
3218                 "Peers failed to connect (timeout)");
3219           }
3220         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3221         GNUNET_free(connection);
3222         connection = connection->next;
3223       }
3224     GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3225 #if BAD
3226     other_peer = &pg->peers[connection->index];
3227 #endif
3228   }
3229
3230 /**
3231  * For peers that haven't yet connected, send
3232  * CORE connect requests.
3233  *
3234  * @param cls the 'struct SendHelloContext *'
3235  * @param tc scheduler context
3236  */
3237 static void
3238 send_core_connect_requests (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3239   {
3240     struct SendHelloContext *send_hello_context = cls;
3241     struct PeerConnection *conn;
3242     GNUNET_assert(send_hello_context->peer->daemon->server != NULL);
3243
3244     send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3245
3246     send_hello_context->connect_attempts++;
3247     if (send_hello_context->connect_attempts < send_hello_context->pg->ct_ctx.connect_attempts)
3248       {
3249         conn = send_hello_context->peer->connect_peers_head;
3250         while (conn != NULL)
3251           {
3252             GNUNET_CORE_peer_request_connect(send_hello_context->peer->daemon->server,
3253                 &send_hello_context->pg->peers[conn->index].daemon->id,
3254                 NULL,
3255                 NULL);
3256             conn = conn->next;
3257           }
3258         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) ,
3259             &send_core_connect_requests,
3260             send_hello_context);
3261       }
3262     else
3263       {
3264         GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Timeout before all connections created, marking rest as failed!\n");
3265         GNUNET_SCHEDULER_add_now(&notify_remaining_connections_failed, send_hello_context);
3266       }
3267
3268   }
3269
3270 /**
3271  * Success, connection is up.  Signal client our success.
3272  *
3273  * @param cls our "struct SendHelloContext"
3274  * @param peer identity of the peer that has connected
3275  * @param atsi performance information
3276  *
3277  * FIXME: remove peers from BOTH lists, call notify twice, should
3278  * double the speed of connections as long as the list iteration
3279  * doesn't take too long!
3280  */
3281 static void
3282 core_connect_notify (void *cls,
3283     const struct GNUNET_PeerIdentity *peer,
3284     const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3285   {
3286     struct SendHelloContext *send_hello_context = cls;
3287     struct PeerConnection *connection;
3288     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3289 #if BAD
3290     struct PeerData *other_peer;
3291 #endif
3292 #if DEBUG_TESTING
3293     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3294         "Connected peer %s to peer %s\n",
3295         ctx->d1->shortname, GNUNET_i2s(peer));
3296 #endif
3297
3298     if (0 == memcmp(&send_hello_context->peer->daemon->id, peer, sizeof(struct GNUNET_PeerIdentity)))
3299     return;
3300
3301     connection = send_hello_context->peer->connect_peers_head;
3302 #if BAD
3303     other_peer = NULL;
3304 #endif
3305
3306     while ((connection != NULL) &&
3307         (0 != memcmp(&pg->peers[connection->index].daemon->id, peer, sizeof(struct GNUNET_PeerIdentity))))
3308       {
3309         connection = connection->next;
3310       }
3311
3312     if (connection == NULL)
3313       {
3314         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);
3315       }
3316     else
3317       {
3318 #if BAD
3319         other_peer = &pg->peers[connection->index];
3320 #endif
3321         if (pg->notify_connection != NULL)
3322           {
3323             pg->notify_connection(pg->notify_connection_cls,
3324                 &send_hello_context->peer->daemon->id,
3325                 peer,
3326                 0, /* FIXME */
3327                 send_hello_context->peer->daemon->cfg,
3328                 pg->peers[connection->index].daemon->cfg,
3329                 send_hello_context->peer->daemon,
3330                 pg->peers[connection->index].daemon,
3331                 NULL);
3332           }
3333         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3334         GNUNET_free(connection);
3335       }
3336
3337 #if BAD
3338     /* Notify of reverse connection and remove from other peers list of outstanding */
3339     if (other_peer != NULL)
3340       {
3341         connection = other_peer->connect_peers_head;
3342         while ((connection != NULL) &&
3343             (0 != memcmp(&send_hello_context->peer->daemon->id, &pg->peers[connection->index].daemon->id, sizeof(struct GNUNET_PeerIdentity))))
3344           {
3345             connection = connection->next;
3346           }
3347         if (connection != NULL)
3348           {
3349             if (pg->notify_connection != NULL)
3350               {
3351                 pg->notify_connection(pg->notify_connection_cls,
3352                     peer,
3353                     &send_hello_context->peer->daemon->id,
3354                     0, /* FIXME */
3355                     pg->peers[connection->index].daemon->cfg,
3356                     send_hello_context->peer->daemon->cfg,
3357                     pg->peers[connection->index].daemon,
3358                     send_hello_context->peer->daemon,
3359                     NULL);
3360               }
3361
3362             GNUNET_CONTAINER_DLL_remove(other_peer->connect_peers_head, other_peer->connect_peers_tail, connection);
3363             GNUNET_free(connection);
3364           }
3365       }
3366 #endif
3367
3368     if (send_hello_context->peer->connect_peers_head == NULL)
3369       {
3370         GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3371       }
3372   }
3373
3374 /**
3375  * Notify of a successful connection to the core service.
3376  *
3377  * @param cls a struct SendHelloContext *
3378  * @param server handle to the core service
3379  * @param my_identity the peer identity of this peer
3380  * @param publicKey the public key of the peer
3381  */
3382 void
3383 core_init (void *cls,
3384     struct GNUNET_CORE_Handle * server,
3385     const struct GNUNET_PeerIdentity *
3386     my_identity,
3387     const struct
3388     GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
3389     publicKey)
3390   {
3391     struct SendHelloContext *send_hello_context = cls;
3392     send_hello_context->core_ready = GNUNET_YES;
3393   }
3394
3395 /**
3396  * Function called once a hello has been sent
3397  * to the transport, move on to the next one
3398  * or go away forever.
3399  *
3400  * @param cls the 'struct SendHelloContext *'
3401  * @param tc scheduler context
3402  */
3403 static void
3404 hello_sent_callback (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3405   {
3406     struct SendHelloContext *send_hello_context = cls;
3407     //unsigned int pg_iter;
3408     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3409       {
3410         GNUNET_free(send_hello_context);
3411         return;
3412       }
3413
3414     send_hello_context->pg->remaining_hellos--;
3415 #if DEBUG_TESTING
3416     GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Sent HELLO, have %d remaining!\n", send_hello_context->pg->remaining_hellos);
3417 #endif
3418     if (send_hello_context->peer_pos == NULL) /* All HELLOs (for this peer!) have been transmitted! */
3419       {
3420 #if DEBUG_TESTING
3421         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "All hellos for this peer sent, disconnecting transport!\n");
3422 #endif
3423         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3424         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3425         send_hello_context->peer->daemon->th = NULL;
3426
3427         /*if (send_hello_context->pg->remaining_hellos == 0)
3428          {
3429          for (pg_iter = 0; pg_iter < send_hello_context->pg->max_outstanding_connections; pg_iter++)
3430          {
3431          preschedule_connect(&send_hello_context->pg->ct_ctx);
3432          }
3433          }
3434          */
3435         GNUNET_assert (send_hello_context->peer->daemon->server == NULL);
3436         send_hello_context->peer->daemon->server = GNUNET_CORE_connect(send_hello_context->peer->cfg,
3437             1,
3438             send_hello_context,
3439             &core_init,
3440             &core_connect_notify,
3441             NULL,
3442             NULL,
3443             NULL, GNUNET_NO,
3444             NULL, GNUNET_NO,
3445             no_handlers);
3446
3447         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),
3448             &send_core_connect_requests,
3449             send_hello_context);
3450       }
3451     else
3452     GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3453   }
3454
3455 /**
3456  * Connect to a peer, give it all the HELLO's of those peers
3457  * we will later ask it to connect to.
3458  *
3459  * @param ct_ctx the overall connection context
3460  */
3461 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3462   {
3463     struct SendHelloContext *send_hello_context = cls;
3464     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3465
3466     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3467       {
3468         GNUNET_free(send_hello_context);
3469         return;
3470       }
3471
3472     GNUNET_assert(send_hello_context->peer_pos != NULL); /* All of the HELLO sends to be scheduled have been scheduled! */
3473
3474     if (((send_hello_context->peer->daemon->th == NULL) &&
3475             (pg->outstanding_connects > pg->max_outstanding_connections)) ||
3476         (pg->stop_connects == GNUNET_YES))
3477       {
3478 #if VERBOSE_TESTING > 2
3479         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3480             _
3481             ("Delaying connect, we have too many outstanding connections!\n"));
3482 #endif
3483         GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3484             (GNUNET_TIME_UNIT_MILLISECONDS, 100),
3485             &schedule_send_hellos, send_hello_context);
3486       }
3487     else
3488       {
3489 #if VERBOSE_TESTING > 2
3490         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3491             _("Creating connection, outstanding_connections is %d\n"),
3492             outstanding_connects);
3493 #endif
3494         if (send_hello_context->peer->daemon->th == NULL)
3495           {
3496             pg->outstanding_connects++; /* Actual TRANSPORT, CORE connections! */
3497             send_hello_context->peer->daemon->th
3498                 = GNUNET_TRANSPORT_connect (send_hello_context->peer->cfg, NULL,
3499                                             send_hello_context, NULL, NULL, NULL);
3500           }
3501 #if DEBUG_TESTING
3502         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3503             _("Offering Hello of peer %s to peer %s\n"),
3504             send_hello_context->peer->daemon->shortname, pg->peers[send_hello_context->peer_pos->index].daemon->shortname);
3505 #endif
3506         GNUNET_TRANSPORT_offer_hello(send_hello_context->peer->daemon->th,
3507             (const struct GNUNET_MessageHeader *)pg->peers[send_hello_context->peer_pos->index].daemon->hello,
3508             &hello_sent_callback,
3509             send_hello_context);
3510         send_hello_context->peer_pos = send_hello_context->peer_pos->next;
3511         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3512       }
3513   }
3514 #endif
3515
3516 /**
3517  * Internal notification of a connection, kept so that we can ensure some connections
3518  * happen instead of flooding all testing daemons with requests to connect.
3519  */
3520 static void
3521 internal_connect_notify(void *cls, const struct GNUNET_PeerIdentity *first,
3522                         const struct GNUNET_PeerIdentity *second,
3523                         uint32_t distance,
3524                         const struct GNUNET_CONFIGURATION_Handle *first_cfg,
3525                         const struct GNUNET_CONFIGURATION_Handle *second_cfg,
3526                         struct GNUNET_TESTING_Daemon *first_daemon,
3527                         struct GNUNET_TESTING_Daemon *second_daemon,
3528                         const char *emsg)
3529 {
3530   struct ConnectContext *connect_ctx = cls;
3531   struct ConnectTopologyContext *ct_ctx = connect_ctx->ct_ctx;
3532   struct GNUNET_TESTING_PeerGroup *pg = ct_ctx->pg;
3533   struct PeerConnection *connection;
3534
3535   GNUNET_assert (0 < pg->outstanding_connects);
3536   pg->outstanding_connects--;
3537
3538   /*
3539    * Check whether the inverse connection has been scheduled yet,
3540    * if not, we can remove it from the other peers list and avoid
3541    * even trying to connect them again!
3542    */
3543   connection = pg->peers[connect_ctx->second_index].connect_peers_head;
3544 #if BAD
3545   other_peer = NULL;
3546 #endif
3547
3548   while ((connection != NULL) && (0
3549       != memcmp (first, &pg->peers[connection->index].daemon->id,
3550                  sizeof(struct GNUNET_PeerIdentity))))
3551     {
3552       connection = connection->next;
3553     }
3554
3555   if (connection != NULL) /* Can safely remove! */
3556     {
3557       GNUNET_assert (0 < ct_ctx->remaining_connections);
3558       ct_ctx->remaining_connections--;
3559       if (pg->notify_connection != NULL) /* Notify of reverse connection */
3560         pg->notify_connection (pg->notify_connection_cls, second, first,
3561                                distance, second_cfg, first_cfg, second_daemon,
3562                                first_daemon, emsg);
3563
3564       GNUNET_CONTAINER_DLL_remove(pg->peers[connect_ctx->second_index].connect_peers_head, pg->peers[connect_ctx->second_index].connect_peers_tail, connection);
3565       GNUNET_free(connection);
3566     }
3567
3568   if (ct_ctx->remaining_connections == 0)
3569     {
3570       if (ct_ctx->notify_connections_done != NULL)
3571         {
3572           ct_ctx->notify_connections_done (ct_ctx->notify_cls, NULL);
3573           ct_ctx->notify_connections_done = NULL;
3574         }
3575     }
3576   else
3577     preschedule_connect (pg);
3578
3579   if (pg->notify_connection != NULL)
3580     pg->notify_connection (pg->notify_connection_cls, first, second, distance,
3581                            first_cfg, second_cfg, first_daemon, second_daemon,
3582                            emsg);
3583
3584   GNUNET_free(connect_ctx);
3585 }
3586
3587 /**
3588  * Either delay a connection (because there are too many outstanding)
3589  * or schedule it for right now.
3590  *
3591  * @param cls a connection context
3592  * @param tc the task runtime context
3593  */
3594 static void
3595 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3596 {
3597   struct ConnectContext *connect_context = cls;
3598   struct GNUNET_TESTING_PeerGroup *pg = connect_context->ct_ctx->pg;
3599
3600   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3601     return;
3602
3603   if ((pg->outstanding_connects > pg->max_outstanding_connections)
3604       || (pg->stop_connects == GNUNET_YES))
3605     {
3606 #if VERBOSE_TESTING
3607       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3608           _
3609           ("Delaying connect, we have too many outstanding connections!\n"));
3610 #endif
3611       GNUNET_SCHEDULER_add_delayed (
3612                                     GNUNET_TIME_relative_multiply (
3613                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
3614                                                                    100),
3615                                     &schedule_connect, connect_context);
3616     }
3617   else
3618     {
3619 #if VERBOSE_TESTING
3620       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3621           _("Creating connection, outstanding_connections is %d (max %d)\n"),
3622           pg->outstanding_connects, pg->max_outstanding_connections);
3623 #endif
3624       pg->outstanding_connects++;
3625       pg->total_connects_scheduled++;
3626       GNUNET_TESTING_daemons_connect (
3627                                       pg->peers[connect_context->first_index].daemon,
3628                                       pg->peers[connect_context->second_index].daemon,
3629                                       connect_context->ct_ctx->connect_timeout,
3630                                       connect_context->ct_ctx->connect_attempts,
3631 #if USE_SEND_HELLOS
3632                                       GNUNET_NO,
3633 #else
3634                                       GNUNET_YES,
3635 #endif
3636                                       &internal_connect_notify, connect_context); /* FIXME: free connect context! */
3637     }
3638 }
3639
3640 #if !OLD
3641 /**
3642  * Iterator for actually scheduling connections to be created
3643  * between two peers.
3644  *
3645  * @param cls closure, a GNUNET_TESTING_Daemon
3646  * @param key the key the second Daemon was stored under
3647  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3648  *
3649  * @return GNUNET_YES to continue iteration
3650  */
3651 static int
3652 connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3653   {
3654     struct ConnectTopologyContext *ct_ctx = cls;
3655     struct PeerData *first = ct_ctx->first;
3656     struct GNUNET_TESTING_Daemon *second = value;
3657     struct ConnectContext *connect_context;
3658
3659     connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3660     connect_context->first = first->daemon;
3661     connect_context->second = second;
3662     connect_context->ct_ctx = ct_ctx;
3663     GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3664
3665     return GNUNET_YES;
3666   }
3667 #endif
3668
3669 #if !OLD
3670 /**
3671  * Iterator for copying all entries in the allowed hashmap to the
3672  * connect hashmap.
3673  *
3674  * @param cls closure, a GNUNET_TESTING_Daemon
3675  * @param key the key the second Daemon was stored under
3676  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3677  *
3678  * @return GNUNET_YES to continue iteration
3679  */
3680 static int
3681 copy_topology_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3682   {
3683     struct PeerData *first = cls;
3684
3685     GNUNET_assert (GNUNET_OK ==
3686         GNUNET_CONTAINER_multihashmap_put (first->connect_peers, key,
3687             value,
3688             GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
3689
3690     return GNUNET_YES;
3691   }
3692 #endif
3693
3694 /**
3695  * Make the peers to connect the same as those that are allowed to be
3696  * connected.
3697  *
3698  * @param pg the peer group
3699  */
3700 static int
3701 copy_allowed_topology(struct GNUNET_TESTING_PeerGroup *pg)
3702 {
3703   unsigned int pg_iter;
3704   int ret;
3705   int total;
3706 #if OLD
3707   struct PeerConnection *iter;
3708 #endif
3709   total = 0;
3710   ret = 0;
3711   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3712     {
3713 #if OLD
3714       iter = pg->peers[pg_iter].allowed_peers_head;
3715       while (iter != NULL)
3716         {
3717           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3718                       "Creating connection between %d and %d\n", pg_iter,
3719                       iter->index);
3720           total += add_connections (pg, pg_iter, iter->index, CONNECT,
3721                                     GNUNET_YES);
3722           //total += add_actual_connections(pg, pg_iter, iter->index);
3723           iter = iter->next;
3724         }
3725 #else
3726       ret =
3727       GNUNET_CONTAINER_multihashmap_iterate (pg->
3728           peers[pg_iter].allowed_peers,
3729           &copy_topology_iterator,
3730           &pg->peers[pg_iter]);
3731 #endif
3732       if (GNUNET_SYSERR == ret)
3733         return GNUNET_SYSERR;
3734
3735       total = total + ret;
3736     }
3737
3738   return total;
3739 }
3740
3741 /**
3742  * Connect the topology as specified by the PeerConnection's
3743  * of each peer in the peer group
3744  *
3745  * @param pg the peer group we are dealing with
3746  * @param connect_timeout how long try connecting two peers
3747  * @param connect_attempts how many times (max) to attempt
3748  * @param notify_callback callback to notify when finished
3749  * @param notify_cls closure for notify callback
3750  *
3751  * @return the number of connections that will be attempted
3752  */
3753 static int
3754 connect_topology(struct GNUNET_TESTING_PeerGroup *pg,
3755                  struct GNUNET_TIME_Relative connect_timeout,
3756                  unsigned int connect_attempts,
3757                  GNUNET_TESTING_NotifyCompletion notify_callback,
3758                  void *notify_cls)
3759 {
3760   unsigned int pg_iter;
3761   unsigned int total;
3762
3763 #if OLD
3764   struct PeerConnection *connection_iter;
3765 #endif
3766 #if USE_SEND_HELLOS
3767   struct SendHelloContext *send_hello_context;
3768 #endif
3769
3770   total = 0;
3771   pg->ct_ctx.notify_connections_done = notify_callback;
3772   pg->ct_ctx.notify_cls = notify_cls;
3773   pg->ct_ctx.pg = pg;
3774
3775   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3776     {
3777 #if OLD
3778       connection_iter = pg->peers[pg_iter].connect_peers_head;
3779       while (connection_iter != NULL)
3780         {
3781           connection_iter = connection_iter->next;
3782           total++;
3783         }
3784 #else
3785       total +=
3786       GNUNET_CONTAINER_multihashmap_size (pg->peers[pg_iter].connect_peers);
3787 #endif
3788     }
3789
3790   if (total == 0)
3791     return total;
3792
3793   pg->ct_ctx.connect_timeout = connect_timeout;
3794   pg->ct_ctx.connect_attempts = connect_attempts;
3795   pg->ct_ctx.remaining_connections = total;
3796
3797 #if USE_SEND_HELLOS
3798   /* First give all peers the HELLO's of other peers (connect to first peer's transport service, give HELLO's of other peers, continue...) */
3799   pg->remaining_hellos = total;
3800   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3801     {
3802       send_hello_context = GNUNET_malloc(sizeof(struct SendHelloContext));
3803       send_hello_context->peer = &pg->peers[pg_iter];
3804       send_hello_context->peer_pos = pg->peers[pg_iter].connect_peers_head;
3805       send_hello_context->pg = pg;
3806       GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3807     }
3808 #else
3809   for (pg_iter = 0; pg_iter < pg->max_outstanding_connections; pg_iter++)
3810     {
3811       preschedule_connect (pg);
3812     }
3813 #endif
3814   return total;
3815
3816 }
3817
3818 /**
3819  * Takes a peer group and creates a topology based on the
3820  * one specified.  Creates a topology means generates friend
3821  * files for the peers so they can only connect to those allowed
3822  * by the topology.  This will only have an effect once peers
3823  * are started if the FRIENDS_ONLY option is set in the base
3824  * config.  Also takes an optional restrict topology which
3825  * disallows connections based on particular transports
3826  * UNLESS they are specified in the restricted topology.
3827  *
3828  * @param pg the peer group struct representing the running peers
3829  * @param topology which topology to connect the peers in
3830  * @param restrict_topology disallow restrict_transports transport
3831  *                          connections to peers NOT in this topology
3832  *                          use GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
3833  * @param restrict_transports space delimited list of transports to blacklist
3834  *                            to create restricted topology
3835  *
3836  * @return the maximum number of connections were all allowed peers
3837  *         connected to each other
3838  */
3839 unsigned int
3840 GNUNET_TESTING_create_topology(struct GNUNET_TESTING_PeerGroup *pg,
3841                                enum GNUNET_TESTING_Topology topology,
3842                                enum GNUNET_TESTING_Topology restrict_topology,
3843                                const char *restrict_transports)
3844 {
3845   int ret;
3846
3847   unsigned int num_connections;
3848   int unblacklisted_connections;
3849   char *filename;
3850   struct PeerConnection *conn_iter;
3851   struct PeerConnection *temp_conn;
3852   unsigned int off;
3853
3854 #if !OLD
3855   unsigned int i;
3856   for (i = 0; i < pg->total; i++)
3857     {
3858       pg->peers[i].allowed_peers =
3859       GNUNET_CONTAINER_multihashmap_create (100);
3860       pg->peers[i].connect_peers =
3861       GNUNET_CONTAINER_multihashmap_create (100);
3862       pg->peers[i].blacklisted_peers =
3863       GNUNET_CONTAINER_multihashmap_create (100);
3864       pg->peers[i].pg = pg;
3865     }
3866 #endif
3867
3868   switch (topology)
3869     {
3870   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3871 #if VERBOSE_TESTING
3872     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating clique topology\n"));
3873 #endif
3874     num_connections = create_clique (pg, &add_connections, ALLOWED, GNUNET_NO);
3875     break;
3876   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
3877 #if VERBOSE_TESTING
3878     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3879         _("Creating small world (ring) topology\n"));
3880 #endif
3881     num_connections = create_small_world_ring (pg, &add_connections, ALLOWED);
3882     break;
3883   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
3884 #if VERBOSE_TESTING
3885     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3886         _("Creating small world (2d-torus) topology\n"));
3887 #endif
3888     num_connections = create_small_world (pg, &add_connections, ALLOWED);
3889     break;
3890   case GNUNET_TESTING_TOPOLOGY_RING:
3891 #if VERBOSE_TESTING
3892     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring topology\n"));
3893 #endif
3894     num_connections = create_ring (pg, &add_connections, ALLOWED);
3895     break;
3896   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
3897 #if VERBOSE_TESTING
3898     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating 2d torus topology\n"));
3899 #endif
3900     num_connections = create_2d_torus (pg, &add_connections, ALLOWED);
3901     break;
3902   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
3903 #if VERBOSE_TESTING
3904     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3905         _("Creating Erdos-Renyi topology\n"));
3906 #endif
3907     num_connections = create_erdos_renyi (pg, &add_connections, ALLOWED);
3908     break;
3909   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
3910 #if VERBOSE_TESTING
3911     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating InterNAT topology\n"));
3912 #endif
3913     num_connections = create_nated_internet (pg, &add_connections, ALLOWED);
3914     break;
3915   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
3916 #if VERBOSE_TESTING
3917     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3918         _("Creating Scale Free topology\n"));
3919 #endif
3920     num_connections = create_scale_free (pg, &add_connections, ALLOWED);
3921     break;
3922   case GNUNET_TESTING_TOPOLOGY_LINE:
3923 #if VERBOSE_TESTING
3924     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3925         _("Creating straight line topology\n"));
3926 #endif
3927     num_connections = create_line (pg, &add_connections, ALLOWED);
3928     break;
3929   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
3930 #if VERBOSE_TESTING
3931     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3932         _("Creating topology from file!\n"));
3933 #endif
3934     if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "testing",
3935                                                             "topology_file",
3936                                                             &filename))
3937       num_connections = create_from_file (pg, filename, &add_connections,
3938                                           ALLOWED);
3939     else
3940       {
3941         GNUNET_log (
3942                     GNUNET_ERROR_TYPE_WARNING,
3943                     "Missing configuration option TESTING:TOPOLOGY_FILE for creating topology from file!\n");
3944         num_connections = 0;
3945       }
3946     break;
3947   case GNUNET_TESTING_TOPOLOGY_NONE:
3948 #if VERBOSE_TESTING
3949     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3950         _
3951         ("Creating no allowed topology (all peers can connect at core level)\n"));
3952 #endif
3953     num_connections = pg->total * pg->total; /* Clique is allowed! */
3954     break;
3955   default:
3956     num_connections = 0;
3957     break;
3958     }
3959
3960   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "TESTING",
3961                                                           "F2F"))
3962     {
3963       ret = create_and_copy_friend_files (pg);
3964       if (ret != GNUNET_OK)
3965         {
3966 #if VERBOSE_TESTING
3967           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3968               _("Failed during friend file copying!\n"));
3969 #endif
3970           return GNUNET_SYSERR;
3971         }
3972       else
3973         {
3974 #if VERBOSE_TESTING
3975           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3976               _("Friend files created/copied successfully!\n"));
3977 #endif
3978         }
3979     }
3980
3981   /* Use the create clique method to initially set all connections as blacklisted. */
3982   if ((restrict_topology != GNUNET_TESTING_TOPOLOGY_NONE) && (restrict_topology
3983       != GNUNET_TESTING_TOPOLOGY_FROM_FILE))
3984     create_clique (pg, &add_connections, BLACKLIST, GNUNET_NO);
3985   else
3986     return num_connections;
3987
3988   unblacklisted_connections = 0;
3989   /* Un-blacklist connections as per the topology specified */
3990   switch (restrict_topology)
3991     {
3992   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3993 #if VERBOSE_TESTING
3994     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3995         _("Blacklisting all but clique topology\n"));
3996 #endif
3997     unblacklisted_connections = create_clique (pg, &remove_connections,
3998                                                BLACKLIST, GNUNET_NO);
3999     break;
4000   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
4001 #if VERBOSE_TESTING
4002     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4003         _("Blacklisting all but small world (ring) topology\n"));
4004 #endif
4005     unblacklisted_connections = create_small_world_ring (pg,
4006                                                          &remove_connections,
4007                                                          BLACKLIST);
4008     break;
4009   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
4010 #if VERBOSE_TESTING
4011     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4012         _
4013         ("Blacklisting all but small world (2d-torus) topology\n"));
4014 #endif
4015     unblacklisted_connections = create_small_world (pg, &remove_connections,
4016                                                     BLACKLIST);
4017     break;
4018   case GNUNET_TESTING_TOPOLOGY_RING:
4019 #if VERBOSE_TESTING
4020     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4021         _("Blacklisting all but ring topology\n"));
4022 #endif
4023     unblacklisted_connections
4024         = create_ring (pg, &remove_connections, BLACKLIST);
4025     break;
4026   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
4027 #if VERBOSE_TESTING
4028     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4029         _("Blacklisting all but 2d torus topology\n"));
4030 #endif
4031     unblacklisted_connections = create_2d_torus (pg, &remove_connections,
4032                                                  BLACKLIST);
4033     break;
4034   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
4035 #if VERBOSE_TESTING
4036     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4037         _("Blacklisting all but Erdos-Renyi topology\n"));
4038 #endif
4039     unblacklisted_connections = create_erdos_renyi (pg, &remove_connections,
4040                                                     BLACKLIST);
4041     break;
4042   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
4043 #if VERBOSE_TESTING
4044     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4045         _("Blacklisting all but InterNAT topology\n"));
4046 #endif
4047
4048 #if TOPOLOGY_HACK
4049     for (off = 0; off < pg->total; off++)
4050       {
4051         conn_iter = pg->peers[off].allowed_peers_head;
4052         while (conn_iter != NULL)
4053           {
4054             temp_conn = conn_iter->next;
4055             GNUNET_free(conn_iter);
4056             conn_iter = temp_conn;
4057           }
4058         pg->peers[off].allowed_peers_head = NULL;
4059         pg->peers[off].allowed_peers_tail = NULL;
4060
4061         conn_iter = pg->peers[off].connect_peers_head;
4062         while (conn_iter != NULL)
4063           {
4064             temp_conn = conn_iter->next;
4065             GNUNET_free(conn_iter);
4066             conn_iter = temp_conn;
4067           }
4068         pg->peers[off].connect_peers_head = NULL;
4069         pg->peers[off].connect_peers_tail = NULL;
4070       }
4071     unblacklisted_connections
4072         = create_nated_internet_copy (pg, &remove_connections, BLACKLIST);
4073 #else
4074     unblacklisted_connections =
4075     create_nated_internet (pg, &remove_connections, BLACKLIST);
4076 #endif
4077
4078     break;
4079   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
4080 #if VERBOSE_TESTING
4081     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4082         _("Blacklisting all but Scale Free topology\n"));
4083 #endif
4084     unblacklisted_connections = create_scale_free (pg, &remove_connections,
4085                                                    BLACKLIST);
4086     break;
4087   case GNUNET_TESTING_TOPOLOGY_LINE:
4088 #if VERBOSE_TESTING
4089     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4090         _("Blacklisting all but straight line topology\n"));
4091 #endif
4092     unblacklisted_connections
4093         = create_line (pg, &remove_connections, BLACKLIST);
4094     break;
4095   case GNUNET_TESTING_TOPOLOGY_NONE: /* Fall through */
4096   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
4097 #if VERBOSE_TESTING
4098     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4099         _
4100         ("Creating no blacklist topology (all peers can connect at transport level)\n"));
4101 #endif
4102     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
4103     ("Creating blacklist topology from allowed\n"));
4104     unblacklisted_connections = copy_allowed (pg, &remove_connections);
4105   default:
4106     break;
4107     }
4108
4109   if ((unblacklisted_connections > 0) && (restrict_transports != NULL))
4110     {
4111       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Creating blacklist with `%s'\n",
4112                   restrict_transports);
4113       ret = create_and_copy_blacklist_files (pg, restrict_transports);
4114       if (ret != GNUNET_OK)
4115         {
4116 #if VERBOSE_TESTING
4117           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4118               _("Failed during blacklist file copying!\n"));
4119 #endif
4120           return 0;
4121         }
4122       else
4123         {
4124 #if VERBOSE_TESTING
4125           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4126               _("Blacklist files created/copied successfully!\n"));
4127 #endif
4128         }
4129     }
4130   return num_connections;
4131 }
4132
4133 #if !OLD
4134 /**
4135  * Iterator for choosing random peers to connect.
4136  *
4137  * @param cls closure, a RandomContext
4138  * @param key the key the second Daemon was stored under
4139  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4140  *
4141  * @return GNUNET_YES to continue iteration
4142  */
4143 static int
4144 random_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4145   {
4146     struct RandomContext *random_ctx = cls;
4147     double random_number;
4148     uint32_t second_pos;
4149     GNUNET_HashCode first_hash;
4150     random_number =
4151     ((double)
4152         GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4153             UINT64_MAX)) / ((double) UINT64_MAX);
4154     if (random_number < random_ctx->percentage)
4155       {
4156         GNUNET_assert (GNUNET_OK ==
4157             GNUNET_CONTAINER_multihashmap_put (random_ctx->
4158                 first->connect_peers_working_set,
4159                 key, value,
4160                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4161       }
4162
4163     /* Now we have considered this particular connection, remove it from the second peer so it's not double counted */
4164     uid_from_hash (key, &second_pos);
4165     hash_from_uid (random_ctx->first_uid, &first_hash);
4166     GNUNET_assert (random_ctx->pg->total > second_pos);
4167     GNUNET_assert (GNUNET_YES ==
4168         GNUNET_CONTAINER_multihashmap_remove (random_ctx->
4169             pg->peers
4170             [second_pos].connect_peers,
4171             &first_hash,
4172             random_ctx->
4173             first->daemon));
4174
4175     return GNUNET_YES;
4176   }
4177
4178 /**
4179  * Iterator for adding at least X peers to a peers connection set.
4180  *
4181  * @param cls closure, MinimumContext
4182  * @param key the key the second Daemon was stored under
4183  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4184  *
4185  * @return GNUNET_YES to continue iteration
4186  */
4187 static int
4188 minimum_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4189   {
4190     struct MinimumContext *min_ctx = cls;
4191     uint32_t second_pos;
4192     GNUNET_HashCode first_hash;
4193     unsigned int i;
4194
4195     if (GNUNET_CONTAINER_multihashmap_size
4196         (min_ctx->first->connect_peers_working_set) < min_ctx->num_to_add)
4197       {
4198         for (i = 0; i < min_ctx->num_to_add; i++)
4199           {
4200             if (min_ctx->pg_array[i] == min_ctx->current)
4201               {
4202                 GNUNET_assert (GNUNET_OK ==
4203                     GNUNET_CONTAINER_multihashmap_put
4204                     (min_ctx->first->connect_peers_working_set, key,
4205                         value,
4206                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4207                 uid_from_hash (key, &second_pos);
4208                 hash_from_uid (min_ctx->first_uid, &first_hash);
4209                 GNUNET_assert (min_ctx->pg->total > second_pos);
4210                 GNUNET_assert (GNUNET_OK ==
4211                     GNUNET_CONTAINER_multihashmap_put (min_ctx->
4212                         pg->peers
4213                         [second_pos].connect_peers_working_set,
4214                         &first_hash,
4215                         min_ctx->first->
4216                         daemon,
4217                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4218                 /* Now we have added this particular connection, remove it from the second peer's map so it's not double counted */
4219                 GNUNET_assert (GNUNET_YES ==
4220                     GNUNET_CONTAINER_multihashmap_remove
4221                     (min_ctx->pg->peers[second_pos].connect_peers,
4222                         &first_hash, min_ctx->first->daemon));
4223               }
4224           }
4225         min_ctx->current++;
4226         return GNUNET_YES;
4227       }
4228     else
4229     return GNUNET_NO; /* We can stop iterating, we have enough peers! */
4230
4231   }
4232
4233 /**
4234  * Iterator for adding peers to a connection set based on a depth first search.
4235  *
4236  * @param cls closure, MinimumContext
4237  * @param key the key the second daemon was stored under
4238  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4239  *
4240  * @return GNUNET_YES to continue iteration
4241  */
4242 static int
4243 dfs_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4244   {
4245     struct DFSContext *dfs_ctx = cls;
4246     GNUNET_HashCode first_hash;
4247
4248     if (dfs_ctx->current == dfs_ctx->chosen)
4249       {
4250         GNUNET_assert (GNUNET_OK ==
4251             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4252                 first->connect_peers_working_set,
4253                 key, value,
4254                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4255         uid_from_hash (key, &dfs_ctx->second_uid);
4256         hash_from_uid (dfs_ctx->first_uid, &first_hash);
4257         GNUNET_assert (GNUNET_OK ==
4258             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4259                 pg->peers
4260                 [dfs_ctx->second_uid].connect_peers_working_set,
4261                 &first_hash,
4262                 dfs_ctx->
4263                 first->daemon,
4264                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4265         GNUNET_assert (GNUNET_YES ==
4266             GNUNET_CONTAINER_multihashmap_remove (dfs_ctx->
4267                 pg->peers
4268                 [dfs_ctx->second_uid].connect_peers,
4269                 &first_hash,
4270                 dfs_ctx->
4271                 first->daemon));
4272         /* Can't remove second from first yet because we are currently iterating, hence the return value in the DFSContext! */
4273         return GNUNET_NO; /* We have found our peer, don't iterate more */
4274       }
4275
4276     dfs_ctx->current++;
4277     return GNUNET_YES;
4278   }
4279 #endif
4280
4281 /**
4282  * From the set of connections possible, choose percentage percent of connections
4283  * to actually connect.
4284  *
4285  * @param pg the peergroup we are dealing with
4286  * @param percentage what percent of total connections to make
4287  */
4288 void
4289 choose_random_connections(struct GNUNET_TESTING_PeerGroup *pg,
4290                           double percentage)
4291 {
4292   uint32_t pg_iter;
4293 #if OLD
4294   struct PeerConnection *conn_iter;
4295   double random_number;
4296 #else
4297   struct RandomContext random_ctx;
4298 #endif
4299
4300   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4301     {
4302 #if OLD
4303       conn_iter = pg->peers[pg_iter].connect_peers_head;
4304       while (conn_iter != NULL)
4305         {
4306           random_number
4307               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4308                                                     UINT64_MAX))
4309                   / ((double) UINT64_MAX);
4310           if (random_number < percentage)
4311             {
4312               add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4313                                GNUNET_YES);
4314             }
4315           conn_iter = conn_iter->next;
4316         }
4317 #else
4318       random_ctx.first_uid = pg_iter;
4319       random_ctx.first = &pg->peers[pg_iter];
4320       random_ctx.percentage = percentage;
4321       random_ctx.pg = pg;
4322       pg->peers[pg_iter].connect_peers_working_set
4323         = GNUNET_CONTAINER_multihashmap_create (pg->total);
4324       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4325                                              &random_connect_iterator,
4326                                              &random_ctx);
4327       /* Now remove the old connections */
4328       GNUNET_CONTAINER_multihashmap_destroy (pg->
4329                                              peers[pg_iter].connect_peers);
4330       /* And replace with the random set */
4331       pg->peers[pg_iter].connect_peers
4332         = pg->peers[pg_iter].connect_peers_working_set;
4333 #endif
4334     }
4335
4336   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4337     {
4338       conn_iter = pg->peers[pg_iter].connect_peers_head;
4339       while (pg->peers[pg_iter].connect_peers_head != NULL)
4340         remove_connections (pg, pg_iter,
4341                             pg->peers[pg_iter].connect_peers_head->index,
4342                             CONNECT, GNUNET_YES);
4343
4344       pg->peers[pg_iter].connect_peers_head
4345           = pg->peers[pg_iter].connect_peers_working_set_head;
4346       pg->peers[pg_iter].connect_peers_tail
4347           = pg->peers[pg_iter].connect_peers_working_set_tail;
4348       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4349       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4350     }
4351 }
4352
4353 /**
4354  * Count the number of connections in a linked list of connections.
4355  *
4356  * @param conn_list the connection list to get the count of
4357  *
4358  * @return the number of elements in the list
4359  */
4360 static unsigned int
4361 count_connections(struct PeerConnection *conn_list)
4362 {
4363   struct PeerConnection *iter;
4364   unsigned int count;
4365   count = 0;
4366   iter = conn_list;
4367   while (iter != NULL)
4368     {
4369       iter = iter->next;
4370       count++;
4371     }
4372   return count;
4373 }
4374
4375 static unsigned int
4376 count_workingset_connections(struct GNUNET_TESTING_PeerGroup *pg)
4377 {
4378   unsigned int count;
4379   unsigned int pg_iter;
4380 #if OLD
4381   struct PeerConnection *conn_iter;
4382 #endif
4383   count = 0;
4384
4385   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4386     {
4387 #if OLD
4388       conn_iter = pg->peers[pg_iter].connect_peers_working_set_head;
4389       while (conn_iter != NULL)
4390         {
4391           count++;
4392           conn_iter = conn_iter->next;
4393         }
4394 #else
4395       count +=
4396       GNUNET_CONTAINER_multihashmap_size (pg->
4397           peers
4398           [pg_iter].connect_peers_working_set);
4399 #endif
4400     }
4401
4402   return count;
4403 }
4404
4405 static unsigned int
4406 count_allowed_connections(struct GNUNET_TESTING_PeerGroup *pg)
4407 {
4408   unsigned int count;
4409   unsigned int pg_iter;
4410 #if OLD
4411   struct PeerConnection *conn_iter;
4412 #endif
4413
4414   count = 0;
4415   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4416     {
4417 #if OLD
4418       conn_iter = pg->peers[pg_iter].allowed_peers_head;
4419       while (conn_iter != NULL)
4420         {
4421           count++;
4422           conn_iter = conn_iter->next;
4423         }
4424 #else
4425       count +=
4426       GNUNET_CONTAINER_multihashmap_size (pg->
4427           peers
4428           [pg_iter].allowed_peers);
4429 #endif
4430     }
4431
4432   return count;
4433 }
4434
4435 /**
4436  * From the set of connections possible, choose at least num connections per
4437  * peer.
4438  *
4439  * @param pg the peergroup we are dealing with
4440  * @param num how many connections at least should each peer have (if possible)?
4441  */
4442 static void
4443 choose_minimum(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4444 {
4445 #if !OLD
4446   struct MinimumContext minimum_ctx;
4447 #else
4448   struct PeerConnection *conn_iter;
4449   unsigned int temp_list_size;
4450   unsigned int i;
4451   unsigned int count;
4452   uint32_t random; /* Random list entry to connect peer to */
4453 #endif
4454   uint32_t pg_iter;
4455
4456 #if OLD
4457   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4458     {
4459       temp_list_size
4460           = count_connections (pg->peers[pg_iter].connect_peers_head);
4461       if (temp_list_size == 0)
4462         {
4463           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4464                       "Peer %d has 0 connections!?!?\n", pg_iter);
4465           break;
4466         }
4467       for (i = 0; i < num; i++)
4468         {
4469           random = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4470                                              temp_list_size);
4471           conn_iter = pg->peers[pg_iter].connect_peers_head;
4472           for (count = 0; count < random; count++)
4473             conn_iter = conn_iter->next;
4474           /* We now have a random connection, connect it! */
4475           GNUNET_assert(conn_iter != NULL);
4476           add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4477                            GNUNET_YES);
4478         }
4479     }
4480 #else
4481   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4482     {
4483       pg->peers[pg_iter].connect_peers_working_set =
4484       GNUNET_CONTAINER_multihashmap_create (num);
4485     }
4486
4487   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4488     {
4489       minimum_ctx.first_uid = pg_iter;
4490       minimum_ctx.pg_array =
4491       GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
4492           GNUNET_CONTAINER_multihashmap_size
4493           (pg->peers[pg_iter].connect_peers));
4494       minimum_ctx.first = &pg->peers[pg_iter];
4495       minimum_ctx.pg = pg;
4496       minimum_ctx.num_to_add = num;
4497       minimum_ctx.current = 0;
4498       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4499           &minimum_connect_iterator,
4500           &minimum_ctx);
4501     }
4502
4503   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4504     {
4505       /* Remove the "old" connections */
4506       GNUNET_CONTAINER_multihashmap_destroy (pg->
4507           peers[pg_iter].connect_peers);
4508       /* And replace with the working set */
4509       pg->peers[pg_iter].connect_peers =
4510       pg->peers[pg_iter].connect_peers_working_set;
4511     }
4512 #endif
4513   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4514     {
4515       while (pg->peers[pg_iter].connect_peers_head != NULL)
4516         {
4517           conn_iter = pg->peers[pg_iter].connect_peers_head;
4518           GNUNET_CONTAINER_DLL_remove(pg->peers[pg_iter].connect_peers_head,
4519               pg->peers[pg_iter].connect_peers_tail,
4520               conn_iter);
4521           GNUNET_free(conn_iter);
4522           /*remove_connections(pg, pg_iter, pg->peers[pg_iter].connect_peers_head->index, CONNECT, GNUNET_YES);*/
4523         }
4524
4525       pg->peers[pg_iter].connect_peers_head
4526           = pg->peers[pg_iter].connect_peers_working_set_head;
4527       pg->peers[pg_iter].connect_peers_tail
4528           = pg->peers[pg_iter].connect_peers_working_set_tail;
4529       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4530       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4531     }
4532 }
4533
4534 #if !OLD
4535 struct FindClosestContext
4536   {
4537     /**
4538      * The currently known closest peer.
4539      */
4540     struct GNUNET_TESTING_Daemon *closest;
4541
4542     /**
4543      * The info for the peer we are adding connections for.
4544      */
4545     struct PeerData *curr_peer;
4546
4547     /**
4548      * The distance (bits) between the current
4549      * peer and the currently known closest.
4550      */
4551     unsigned int closest_dist;
4552
4553     /**
4554      * The offset of the closest known peer in
4555      * the peer group.
4556      */
4557     unsigned int closest_num;
4558   };
4559
4560 /**
4561  * Iterator over hash map entries of the allowed
4562  * peer connections.  Find the closest, not already
4563  * connected peer and return it.
4564  *
4565  * @param cls closure (struct FindClosestContext)
4566  * @param key current key code (hash of offset in pg)
4567  * @param value value in the hash map - a GNUNET_TESTING_Daemon
4568  * @return GNUNET_YES if we should continue to
4569  *         iterate,
4570  *         GNUNET_NO if not.
4571  */
4572 static int
4573 find_closest_peers (void *cls, const GNUNET_HashCode * key, void *value)
4574   {
4575     struct FindClosestContext *closest_ctx = cls;
4576     struct GNUNET_TESTING_Daemon *daemon = value;
4577
4578     if (((closest_ctx->closest == NULL) ||
4579             (GNUNET_CRYPTO_hash_matching_bits
4580                 (&daemon->id.hashPubKey,
4581                     &closest_ctx->curr_peer->daemon->id.hashPubKey) >
4582                 closest_ctx->closest_dist))
4583         && (GNUNET_YES !=
4584             GNUNET_CONTAINER_multihashmap_contains (closest_ctx->
4585                 curr_peer->connect_peers,
4586                 key)))
4587       {
4588         closest_ctx->closest_dist =
4589         GNUNET_CRYPTO_hash_matching_bits (&daemon->id.hashPubKey,
4590             &closest_ctx->curr_peer->daemon->
4591             id.hashPubKey);
4592         closest_ctx->closest = daemon;
4593         uid_from_hash (key, &closest_ctx->closest_num);
4594       }
4595     return GNUNET_YES;
4596   }
4597
4598 /**
4599  * From the set of connections possible, choose at num connections per
4600  * peer based on depth which are closest out of those allowed.  Guaranteed
4601  * to add num peers to connect to, provided there are that many peers
4602  * in the underlay topology to connect to.
4603  *
4604  * @param pg the peergroup we are dealing with
4605  * @param num how many connections at least should each peer have (if possible)?
4606  * @param proc processor to actually add the connections
4607  * @param list the peer list to use
4608  */
4609 void
4610 add_closest (struct GNUNET_TESTING_PeerGroup *pg, unsigned int num,
4611     GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
4612   {
4613 #if OLD
4614
4615 #else
4616     struct FindClosestContext closest_ctx;
4617 #endif
4618     uint32_t pg_iter;
4619     uint32_t i;
4620
4621     for (i = 0; i < num; i++) /* Each time find a closest peer (from those available) */
4622       {
4623         for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4624           {
4625             closest_ctx.curr_peer = &pg->peers[pg_iter];
4626             closest_ctx.closest = NULL;
4627             closest_ctx.closest_dist = 0;
4628             closest_ctx.closest_num = 0;
4629             GNUNET_CONTAINER_multihashmap_iterate (pg->
4630                 peers[pg_iter].allowed_peers,
4631                 &find_closest_peers,
4632                 &closest_ctx);
4633             if (closest_ctx.closest != NULL)
4634               {
4635                 GNUNET_assert (closest_ctx.closest_num < pg->total);
4636                 proc (pg, pg_iter, closest_ctx.closest_num, list);
4637               }
4638           }
4639       }
4640   }
4641 #endif
4642
4643 /**
4644  * From the set of connections possible, choose at least num connections per
4645  * peer based on depth first traversal of peer connections.  If DFS leaves
4646  * peers unconnected, ensure those peers get connections.
4647  *
4648  * @param pg the peergroup we are dealing with
4649  * @param num how many connections at least should each peer have (if possible)?
4650  */
4651 void
4652 perform_dfs(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4653 {
4654   uint32_t pg_iter;
4655   uint32_t dfs_count;
4656   uint32_t starting_peer;
4657   uint32_t least_connections;
4658   uint32_t random_connection;
4659 #if OLD
4660   unsigned int temp_count;
4661   struct PeerConnection *peer_iter;
4662 #else
4663   struct DFSContext dfs_ctx;
4664   GNUNET_HashCode second_hash;
4665 #endif
4666
4667 #if OLD
4668   starting_peer = 0;
4669   dfs_count = 0;
4670   while ((count_workingset_connections (pg) < num * pg->total)
4671       && (count_allowed_connections (pg) > 0))
4672     {
4673       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4674         {
4675           least_connections = -1; /* Set to very high number */
4676           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4677             {
4678               temp_count
4679                   = count_connections (
4680                                        pg->peers[pg_iter].connect_peers_working_set_head);
4681               if (temp_count < least_connections)
4682                 {
4683                   starting_peer = pg_iter;
4684                   least_connections = temp_count;
4685                 }
4686             }
4687         }
4688
4689       temp_count
4690           = count_connections (pg->peers[starting_peer].connect_peers_head);
4691       if (temp_count == 0)
4692         continue; /* FIXME: infinite loop? */
4693
4694       random_connection = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4695                                                     temp_count);
4696       temp_count = 0;
4697       peer_iter = pg->peers[starting_peer].connect_peers_head;
4698       while (temp_count < random_connection)
4699         {
4700           peer_iter = peer_iter->next;
4701           temp_count++;
4702         }
4703       GNUNET_assert(peer_iter != NULL);
4704       add_connections (pg, starting_peer, peer_iter->index, WORKING_SET,
4705                        GNUNET_NO);
4706       remove_connections (pg, starting_peer, peer_iter->index, CONNECT,
4707                           GNUNET_YES);
4708       starting_peer = peer_iter->index;
4709       dfs_count++;
4710     }
4711
4712 #else
4713   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4714     {
4715       pg->peers[pg_iter].connect_peers_working_set =
4716       GNUNET_CONTAINER_multihashmap_create (num);
4717     }
4718
4719   starting_peer = 0;
4720   dfs_count = 0;
4721   while ((count_workingset_connections (pg) < num * pg->total)
4722       && (count_allowed_connections (pg) > 0))
4723     {
4724       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4725         {
4726           least_connections = -1; /* Set to very high number */
4727           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4728             {
4729               if (GNUNET_CONTAINER_multihashmap_size
4730                   (pg->peers[pg_iter].connect_peers_working_set) <
4731                   least_connections)
4732                 {
4733                   starting_peer = pg_iter;
4734                   least_connections =
4735                   GNUNET_CONTAINER_multihashmap_size (pg->
4736                       peers
4737                       [pg_iter].connect_peers_working_set);
4738                 }
4739             }
4740         }
4741
4742       if (GNUNET_CONTAINER_multihashmap_size (pg->peers[starting_peer].connect_peers) == 0) /* Ensure there is at least one peer left to connect! */
4743         {
4744           dfs_count = 0;
4745           continue;
4746         }
4747
4748       /* Choose a random peer from the chosen peers set of connections to add */
4749       dfs_ctx.chosen =
4750       GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4751           GNUNET_CONTAINER_multihashmap_size
4752           (pg->peers[starting_peer].connect_peers));
4753       dfs_ctx.first_uid = starting_peer;
4754       dfs_ctx.first = &pg->peers[starting_peer];
4755       dfs_ctx.pg = pg;
4756       dfs_ctx.current = 0;
4757
4758       GNUNET_CONTAINER_multihashmap_iterate (pg->
4759           peers
4760           [starting_peer].connect_peers,
4761           &dfs_connect_iterator, &dfs_ctx);
4762       /* Remove the second from the first, since we will be continuing the search and may encounter the first peer again! */
4763       hash_from_uid (dfs_ctx.second_uid, &second_hash);
4764       GNUNET_assert (GNUNET_YES ==
4765           GNUNET_CONTAINER_multihashmap_remove (pg->peers
4766               [starting_peer].connect_peers,
4767               &second_hash,
4768               pg->
4769               peers
4770               [dfs_ctx.second_uid].daemon));
4771       starting_peer = dfs_ctx.second_uid;
4772     }
4773
4774   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4775     {
4776       /* Remove the "old" connections */
4777       GNUNET_CONTAINER_multihashmap_destroy (pg->
4778           peers[pg_iter].connect_peers);
4779       /* And replace with the working set */
4780       pg->peers[pg_iter].connect_peers =
4781       pg->peers[pg_iter].connect_peers_working_set;
4782     }
4783 #endif
4784 }
4785
4786 /**
4787  * Internal callback for topology information for a particular peer.
4788  */
4789 static void
4790 internal_topology_callback(void *cls, const struct GNUNET_PeerIdentity *peer,
4791                            const struct GNUNET_TRANSPORT_ATS_Information *atsi)
4792 {
4793   struct CoreContext *core_ctx = cls;
4794   struct TopologyIterateContext *iter_ctx = core_ctx->iter_context;
4795
4796   if (peer == NULL) /* Either finished, or something went wrong */
4797     {
4798       iter_ctx->completed++;
4799       iter_ctx->connected--;
4800       /* One core context allocated per iteration, must free! */
4801       GNUNET_free (core_ctx);
4802     }
4803   else
4804     {
4805       iter_ctx->topology_cb (iter_ctx->cls, &core_ctx->daemon->id, peer, NULL);
4806     }
4807
4808   if (iter_ctx->completed == iter_ctx->total)
4809     {
4810       iter_ctx->topology_cb (iter_ctx->cls, NULL, NULL, NULL);
4811       /* Once all are done, free the iteration context */
4812       GNUNET_free (iter_ctx);
4813     }
4814 }
4815
4816 /**
4817  * Check running topology iteration tasks, if below max start a new one, otherwise
4818  * schedule for some time in the future.
4819  */
4820 static void
4821 schedule_get_topology(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4822 {
4823   struct CoreContext *core_context = cls;
4824   struct TopologyIterateContext *topology_context =
4825       (struct TopologyIterateContext *) core_context->iter_context;
4826   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4827     return;
4828
4829   if (topology_context->connected
4830       > topology_context->pg->max_outstanding_connections)
4831     {
4832 #if VERBOSE_TESTING > 2
4833       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4834           _
4835           ("Delaying connect, we have too many outstanding connections!\n"));
4836 #endif
4837       GNUNET_SCHEDULER_add_delayed (
4838                                     GNUNET_TIME_relative_multiply (
4839                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4840                                                                    100),
4841                                     &schedule_get_topology, core_context);
4842     }
4843   else
4844     {
4845 #if VERBOSE_TESTING > 2
4846       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4847           _("Creating connection, outstanding_connections is %d\n"),
4848           outstanding_connects);
4849 #endif
4850       topology_context->connected++;
4851
4852       if (GNUNET_OK != GNUNET_CORE_iterate_peers (core_context->daemon->cfg,
4853                                                   &internal_topology_callback,
4854                                                   core_context))
4855         {
4856           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Topology iteration failed.\n");
4857           internal_topology_callback (core_context, NULL, NULL);
4858         }
4859     }
4860 }
4861
4862 /**
4863  * Iterate over all (running) peers in the peer group, retrieve
4864  * all connections that each currently has.
4865  */
4866 void
4867 GNUNET_TESTING_get_topology(struct GNUNET_TESTING_PeerGroup *pg,
4868                             GNUNET_TESTING_NotifyTopology cb, void *cls)
4869 {
4870   struct TopologyIterateContext *topology_context;
4871   struct CoreContext *core_ctx;
4872   unsigned int i;
4873   unsigned int total_count;
4874
4875   /* Allocate a single topology iteration context */
4876   topology_context = GNUNET_malloc (sizeof (struct TopologyIterateContext));
4877   topology_context->topology_cb = cb;
4878   topology_context->cls = cls;
4879   topology_context->pg = pg;
4880   total_count = 0;
4881   for (i = 0; i < pg->total; i++)
4882     {
4883       if (pg->peers[i].daemon->running == GNUNET_YES)
4884         {
4885           /* Allocate one core context per core we need to connect to */
4886           core_ctx = GNUNET_malloc (sizeof (struct CoreContext));
4887           core_ctx->daemon = pg->peers[i].daemon;
4888           /* Set back pointer to topology iteration context */
4889           core_ctx->iter_context = topology_context;
4890           GNUNET_SCHEDULER_add_now (&schedule_get_topology, core_ctx);
4891           total_count++;
4892         }
4893     }
4894   if (total_count == 0)
4895     {
4896       cb (cls, NULL, NULL, "Cannot iterate over topology, no running peers!");
4897       GNUNET_free (topology_context);
4898     }
4899   else
4900     topology_context->total = total_count;
4901   return;
4902 }
4903
4904 /**
4905  * Callback function to process statistic values.
4906  * This handler is here only really to insert a peer
4907  * identity (or daemon) so the statistics can be uniquely
4908  * tied to a single running peer.
4909  *
4910  * @param cls closure
4911  * @param subsystem name of subsystem that created the statistic
4912  * @param name the name of the datum
4913  * @param value the current value
4914  * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
4915  * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
4916  */
4917 static int
4918 internal_stats_callback(void *cls, const char *subsystem, const char *name,
4919                         uint64_t value, int is_persistent)
4920 {
4921   struct StatsCoreContext *core_context = cls;
4922   struct StatsIterateContext *stats_context =
4923       (struct StatsIterateContext *) core_context->iter_context;
4924
4925   return stats_context->proc (stats_context->cls, &core_context->daemon->id,
4926                               subsystem, name, value, is_persistent);
4927 }
4928
4929 /**
4930  * Internal continuation call for statistics iteration.
4931  *
4932  * @param cls closure, the CoreContext for this iteration
4933  * @param success whether or not the statistics iterations
4934  *        was canceled or not (we don't care)
4935  */
4936 static void
4937 internal_stats_cont(void *cls, int success)
4938 {
4939   struct StatsCoreContext *core_context = cls;
4940   struct StatsIterateContext *stats_context =
4941       (struct StatsIterateContext *) core_context->iter_context;
4942
4943   stats_context->connected--;
4944   stats_context->completed++;
4945
4946   if (stats_context->completed == stats_context->total)
4947     {
4948       stats_context->cont (stats_context->cls, GNUNET_YES);
4949       GNUNET_free (stats_context);
4950     }
4951
4952   if (core_context->stats_handle != NULL)
4953     GNUNET_STATISTICS_destroy (core_context->stats_handle, GNUNET_NO);
4954
4955   GNUNET_free (core_context);
4956 }
4957
4958 /**
4959  * Check running topology iteration tasks, if below max start a new one, otherwise
4960  * schedule for some time in the future.
4961  */
4962 static void
4963 schedule_get_statistics(void *cls,
4964                         const struct GNUNET_SCHEDULER_TaskContext *tc)
4965 {
4966   struct StatsCoreContext *core_context = cls;
4967   struct StatsIterateContext *stats_context =
4968       (struct StatsIterateContext *) core_context->iter_context;
4969
4970   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4971     return;
4972
4973   if (stats_context->connected > stats_context->pg->max_outstanding_connections)
4974     {
4975 #if VERBOSE_TESTING > 2
4976       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4977           _
4978           ("Delaying connect, we have too many outstanding connections!\n"));
4979 #endif
4980       GNUNET_SCHEDULER_add_delayed (
4981                                     GNUNET_TIME_relative_multiply (
4982                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4983                                                                    100),
4984                                     &schedule_get_statistics, core_context);
4985     }
4986   else
4987     {
4988 #if VERBOSE_TESTING > 2
4989       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4990           _("Creating connection, outstanding_connections is %d\n"),
4991           outstanding_connects);
4992 #endif
4993
4994       stats_context->connected++;
4995       core_context->stats_handle
4996           = GNUNET_STATISTICS_create ("testing", core_context->daemon->cfg);
4997       if (core_context->stats_handle == NULL)
4998         {
4999           internal_stats_cont (core_context, GNUNET_NO);
5000           return;
5001         }
5002
5003       core_context->stats_get_handle
5004           = GNUNET_STATISTICS_get (core_context->stats_handle, NULL, NULL,
5005                                    GNUNET_TIME_relative_get_forever (),
5006                                    &internal_stats_cont,
5007                                    &internal_stats_callback, core_context);
5008       if (core_context->stats_get_handle == NULL)
5009         internal_stats_cont (core_context, GNUNET_NO);
5010
5011     }
5012 }
5013
5014 struct DuplicateStats
5015 {
5016   /**
5017    * Next item in the list
5018    */
5019   struct DuplicateStats *next;
5020
5021   /**
5022    * Nasty string, concatenation of relevant information.
5023    */
5024   char *unique_string;
5025 };
5026
5027 /**
5028  * Check whether the combination of port/host/unix domain socket
5029  * already exists in the list of peers being checked for statistics.
5030  *
5031  * @param pg the peergroup in question
5032  * @param specific_peer the peer we're concerned with
5033  * @param stats_list the list to return to the caller
5034  *
5035  * @return GNUNET_YES if the statistics instance has been seen already,
5036  *         GNUNET_NO if not (and we may have added it to the list)
5037  */
5038 static int
5039 stats_check_existing(struct GNUNET_TESTING_PeerGroup *pg,
5040                      struct PeerData *specific_peer,
5041                      struct DuplicateStats **stats_list)
5042 {
5043   struct DuplicateStats *pos;
5044   char *unix_domain_socket;
5045   unsigned long long port;
5046   char *to_match;
5047   if (GNUNET_YES
5048       != GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "testing",
5049                                                "single_statistics_per_host"))
5050     return GNUNET_NO; /* Each peer has its own statistics instance, do nothing! */
5051
5052   pos = *stats_list;
5053   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (specific_peer->cfg,
5054                                                           "statistics",
5055                                                           "unixpath",
5056                                                           &unix_domain_socket))
5057     return GNUNET_NO;
5058
5059   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (specific_peer->cfg,
5060                                                           "statistics", "port",
5061                                                           &port))
5062     {
5063       GNUNET_free(unix_domain_socket);
5064       return GNUNET_NO;
5065     }
5066
5067   if (specific_peer->daemon->hostname != NULL)
5068     GNUNET_asprintf (&to_match, "%s%s%llu", specific_peer->daemon->hostname,
5069                      unix_domain_socket, port);
5070   else
5071     GNUNET_asprintf (&to_match, "%s%llu", unix_domain_socket, port);
5072
5073   while (pos != NULL)
5074     {
5075       if (0 == strcmp (to_match, pos->unique_string))
5076         {
5077           GNUNET_free (unix_domain_socket);
5078           GNUNET_free (to_match);
5079           return GNUNET_YES;
5080         }
5081       pos = pos->next;
5082     }
5083   pos = GNUNET_malloc (sizeof (struct DuplicateStats));
5084   pos->unique_string = to_match;
5085   pos->next = *stats_list;
5086   *stats_list = pos;
5087   GNUNET_free (unix_domain_socket);
5088   return GNUNET_NO;
5089 }
5090
5091 /**
5092  * Iterate over all (running) peers in the peer group, retrieve
5093  * all statistics from each.
5094  */
5095 void
5096 GNUNET_TESTING_get_statistics(struct GNUNET_TESTING_PeerGroup *pg,
5097                               GNUNET_STATISTICS_Callback cont,
5098                               GNUNET_TESTING_STATISTICS_Iterator proc,
5099                               void *cls)
5100 {
5101   struct StatsIterateContext *stats_context;
5102   struct StatsCoreContext *core_ctx;
5103   unsigned int i;
5104   unsigned int total_count;
5105   struct DuplicateStats *stats_list;
5106   struct DuplicateStats *pos;
5107   stats_list = NULL;
5108
5109   /* Allocate a single stats iteration context */
5110   stats_context = GNUNET_malloc (sizeof (struct StatsIterateContext));
5111   stats_context->cont = cont;
5112   stats_context->proc = proc;
5113   stats_context->cls = cls;
5114   stats_context->pg = pg;
5115   total_count = 0;
5116
5117   for (i = 0; i < pg->total; i++)
5118     {
5119       if ((pg->peers[i].daemon->running == GNUNET_YES) && (GNUNET_NO
5120           == stats_check_existing (pg, &pg->peers[i], &stats_list)))
5121         {
5122           /* Allocate one core context per core we need to connect to */
5123           core_ctx = GNUNET_malloc (sizeof (struct StatsCoreContext));
5124           core_ctx->daemon = pg->peers[i].daemon;
5125           /* Set back pointer to topology iteration context */
5126           core_ctx->iter_context = stats_context;
5127           GNUNET_SCHEDULER_add_now (&schedule_get_statistics, core_ctx);
5128           total_count++;
5129         }
5130     }
5131
5132   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5133               "Retrieving stats from %u total instances.\n", total_count);
5134   stats_context->total = total_count;
5135   if (stats_list != NULL)
5136     {
5137       pos = stats_list;
5138       while (pos != NULL)
5139         {
5140           GNUNET_free (pos->unique_string);
5141           stats_list = pos->next;
5142           GNUNET_free (pos);
5143           pos = stats_list->next;
5144         }
5145     }
5146   return;
5147 }
5148
5149 /**
5150  * Stop the connection process temporarily.
5151  *
5152  * @param pg the peer group to stop connecting
5153  */
5154 void
5155 GNUNET_TESTING_stop_connections(struct GNUNET_TESTING_PeerGroup *pg)
5156 {
5157   pg->stop_connects = GNUNET_YES;
5158 }
5159
5160 /**
5161  * Resume the connection process temporarily.
5162  *
5163  * @param pg the peer group to resume connecting
5164  */
5165 void
5166 GNUNET_TESTING_resume_connections(struct GNUNET_TESTING_PeerGroup *pg)
5167 {
5168   pg->stop_connects = GNUNET_NO;
5169 }
5170
5171 /**
5172  * There are many ways to connect peers that are supported by this function.
5173  * To connect peers in the same topology that was created via the
5174  * GNUNET_TESTING_create_topology, the topology variable must be set to
5175  * GNUNET_TESTING_TOPOLOGY_NONE.  If the topology variable is specified,
5176  * a new instance of that topology will be generated and attempted to be
5177  * connected.  This could result in some connections being impossible,
5178  * because some topologies are non-deterministic.
5179  *
5180  * @param pg the peer group struct representing the running peers
5181  * @param topology which topology to connect the peers in
5182  * @param options options for connecting the topology
5183  * @param option_modifier modifier for options that take a parameter
5184  * @param connect_timeout how long to wait before giving up on connecting
5185  *                        two peers
5186  * @param connect_attempts how many times to attempt to connect two peers
5187  *                         over the connect_timeout duration
5188  * @param notify_callback notification to be called once all connections completed
5189  * @param notify_cls closure for notification callback
5190  *
5191  * @return the number of connections that will be attempted, GNUNET_SYSERR on error
5192  */
5193 int
5194 GNUNET_TESTING_connect_topology(
5195                                 struct GNUNET_TESTING_PeerGroup *pg,
5196                                 enum GNUNET_TESTING_Topology topology,
5197                                 enum GNUNET_TESTING_TopologyOption options,
5198                                 double option_modifier,
5199                                 struct GNUNET_TIME_Relative connect_timeout,
5200                                 unsigned int connect_attempts,
5201                                 GNUNET_TESTING_NotifyCompletion notify_callback,
5202                                 void *notify_cls)
5203 {
5204   switch (topology)
5205     {
5206   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
5207 #if VERBOSE_TOPOLOGY
5208     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5209                 _("Creating clique CONNECT topology\n"));
5210 #endif
5211     create_clique (pg, &add_connections, CONNECT, GNUNET_NO);
5212     break;
5213   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
5214 #if VERBOSE_TOPOLOGY
5215     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5216                 _("Creating small world (ring) CONNECT topology\n"));
5217 #endif
5218     create_small_world_ring (pg, &add_connections, CONNECT);
5219     break;
5220   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
5221 #if VERBOSE_TOPOLOGY
5222     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5223                 _("Creating small world (2d-torus) CONNECT topology\n"));
5224 #endif
5225     create_small_world (pg, &add_connections, CONNECT);
5226     break;
5227   case GNUNET_TESTING_TOPOLOGY_RING:
5228 #if VERBOSE_TOPOLOGY
5229     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring CONNECT topology\n"));
5230 #endif
5231     create_ring (pg, &add_connections, CONNECT);
5232     break;
5233   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
5234 #if VERBOSE_TOPOLOGY
5235     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5236                 _("Creating 2d torus CONNECT topology\n"));
5237 #endif
5238     create_2d_torus (pg, &add_connections, CONNECT);
5239     break;
5240   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
5241 #if VERBOSE_TOPOLOGY
5242     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5243                 _("Creating Erdos-Renyi CONNECT topology\n"));
5244 #endif
5245     create_erdos_renyi (pg, &add_connections, CONNECT);
5246     break;
5247   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
5248 #if VERBOSE_TOPOLOGY
5249     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5250                 _("Creating InterNAT CONNECT topology\n"));
5251 #endif
5252     create_nated_internet (pg, &add_connections, CONNECT);
5253     break;
5254   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
5255 #if VERBOSE_TOPOLOGY
5256     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5257                 _("Creating Scale Free CONNECT topology\n"));
5258 #endif
5259     create_scale_free (pg, &add_connections, CONNECT);
5260     break;
5261   case GNUNET_TESTING_TOPOLOGY_LINE:
5262 #if VERBOSE_TOPOLOGY
5263     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5264                 _("Creating straight line CONNECT topology\n"));
5265 #endif
5266     create_line (pg, &add_connections, CONNECT);
5267     break;
5268   case GNUNET_TESTING_TOPOLOGY_NONE:
5269 #if VERBOSE_TOPOLOGY
5270     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating no CONNECT topology\n"));
5271 #endif
5272     copy_allowed_topology (pg);
5273     break;
5274   default:
5275     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5276     ("Unknown topology specification, can't connect peers!\n"));
5277     return GNUNET_SYSERR;
5278     }
5279
5280   switch (options)
5281     {
5282   case GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM:
5283 #if VERBOSE_TOPOLOGY
5284     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5285     ("Connecting random subset (%'.2f percent) of possible peers\n"), 100
5286         * option_modifier);
5287 #endif
5288     choose_random_connections (pg, option_modifier);
5289     break;
5290   case GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM:
5291 #if VERBOSE_TOPOLOGY
5292     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5293                 _("Connecting a minimum of %u peers each (if possible)\n"),
5294                 (unsigned int) option_modifier);
5295 #endif
5296     choose_minimum (pg, (unsigned int) option_modifier);
5297     break;
5298   case GNUNET_TESTING_TOPOLOGY_OPTION_DFS:
5299 #if VERBOSE_TOPOLOGY
5300     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5301     ("Using DFS to connect a minimum of %u peers each (if possible)\n"),
5302                 (unsigned int) option_modifier);
5303 #endif
5304 #if FIXME
5305     perform_dfs (pg, (int) option_modifier);
5306 #endif
5307     break;
5308   case GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST:
5309 #if VERBOSE_TOPOLOGY
5310     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5311     ("Finding additional %u closest peers each (if possible)\n"),
5312                 (unsigned int) option_modifier);
5313 #endif
5314 #if FIXME
5315     add_closest (pg, (unsigned int) option_modifier,
5316         &add_connections, CONNECT);
5317 #endif
5318     break;
5319   case GNUNET_TESTING_TOPOLOGY_OPTION_NONE:
5320     break;
5321   case GNUNET_TESTING_TOPOLOGY_OPTION_ALL:
5322     break;
5323   default:
5324     break;
5325     }
5326
5327   return connect_topology (pg, connect_timeout, connect_attempts,
5328                            notify_callback, notify_cls);
5329 }
5330
5331 /**
5332  * Lookup and return the number of SSH connections to a host.
5333  *
5334  * @param hostname the hostname to lookup in the list
5335  * @param pg the peergroup that the host belongs to
5336  *
5337  * @return the number of current ssh connections to the host
5338  */
5339 static unsigned int
5340 count_outstanding_at_host(const char *hostname,
5341                           struct GNUNET_TESTING_PeerGroup *pg)
5342 {
5343   struct OutstandingSSH *pos;
5344   pos = pg->ssh_head;
5345   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5346     pos = pos->next;
5347   GNUNET_assert(pos != NULL);
5348   return pos->outstanding;
5349 }
5350
5351 /**
5352  * Increment the number of SSH connections to a host by one.
5353  *
5354  * @param hostname the hostname to lookup in the list
5355  * @param pg the peergroup that the host belongs to
5356  *
5357  */
5358 static void
5359 increment_outstanding_at_host(const char *hostname,
5360                               struct GNUNET_TESTING_PeerGroup *pg)
5361 {
5362   struct OutstandingSSH *pos;
5363   pos = pg->ssh_head;
5364   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5365     pos = pos->next;
5366   GNUNET_assert(pos != NULL);
5367   pos->outstanding++;
5368 }
5369
5370 /**
5371  * Decrement the number of SSH connections to a host by one.
5372  *
5373  * @param hostname the hostname to lookup in the list
5374  * @param pg the peergroup that the host belongs to
5375  *
5376  */
5377 static void
5378 decrement_outstanding_at_host(const char *hostname,
5379                               struct GNUNET_TESTING_PeerGroup *pg)
5380 {
5381   struct OutstandingSSH *pos;
5382   pos = pg->ssh_head;
5383   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5384     pos = pos->next;
5385   GNUNET_assert(pos != NULL);
5386   pos->outstanding--;
5387 }
5388
5389 /**
5390  * Callback that is called whenever a hostkey is generated
5391  * for a peer.  Call the real callback and decrement the
5392  * starting counter for the peergroup.
5393  *
5394  * @param cls closure
5395  * @param id identifier for the daemon, NULL on error
5396  * @param d handle for the daemon
5397  * @param emsg error message (NULL on success)
5398  */
5399 static void
5400 internal_hostkey_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5401                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5402 {
5403   struct InternalStartContext *internal_context = cls;
5404   internal_context->peer->pg->starting--;
5405   internal_context->peer->pg->started++;
5406   if (internal_context->hostname != NULL)
5407     decrement_outstanding_at_host (internal_context->hostname,
5408                                    internal_context->peer->pg);
5409   if (internal_context->hostkey_callback != NULL)
5410     internal_context->hostkey_callback (internal_context->hostkey_cls, id, d,
5411                                         emsg);
5412   else if (internal_context->peer->pg->started
5413       == internal_context->peer->pg->total)
5414     {
5415       internal_context->peer->pg->started = 0; /* Internal startup may use this counter! */
5416       GNUNET_TESTING_daemons_continue_startup (internal_context->peer->pg);
5417     }
5418 }
5419
5420 /**
5421  * Callback that is called whenever a peer has finished starting.
5422  * Call the real callback and decrement the starting counter
5423  * for the peergroup.
5424  *
5425  * @param cls closure
5426  * @param id identifier for the daemon, NULL on error
5427  * @param cfg config
5428  * @param d handle for the daemon
5429  * @param emsg error message (NULL on success)
5430  */
5431 static void
5432 internal_startup_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5433                           const struct GNUNET_CONFIGURATION_Handle *cfg,
5434                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5435 {
5436   struct InternalStartContext *internal_context = cls;
5437   internal_context->peer->pg->starting--;
5438   if (internal_context->hostname != NULL)
5439     decrement_outstanding_at_host (internal_context->hostname,
5440                                    internal_context->peer->pg);
5441   if (internal_context->start_cb != NULL)
5442     internal_context->start_cb (internal_context->start_cb_cls, id, cfg, d,
5443                                 emsg);
5444 }
5445
5446 static void
5447 internal_continue_startup(void *cls,
5448                           const struct GNUNET_SCHEDULER_TaskContext *tc)
5449 {
5450   struct InternalStartContext *internal_context = cls;
5451
5452   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5453     {
5454       return;
5455     }
5456
5457   if ((internal_context->peer->pg->starting
5458       < internal_context->peer->pg->max_concurrent_ssh)
5459       || ((internal_context->hostname != NULL)
5460           && (count_outstanding_at_host (internal_context->hostname,
5461                                          internal_context->peer->pg)
5462               < internal_context->peer->pg->max_concurrent_ssh)))
5463     {
5464       if (internal_context->hostname != NULL)
5465         increment_outstanding_at_host (internal_context->hostname,
5466                                        internal_context->peer->pg);
5467       internal_context->peer->pg->starting++;
5468       GNUNET_TESTING_daemon_continue_startup (internal_context->peer->daemon);
5469     }
5470   else
5471     {
5472       GNUNET_SCHEDULER_add_delayed (
5473                                     GNUNET_TIME_relative_multiply (
5474                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5475                                                                    100),
5476                                     &internal_continue_startup,
5477                                     internal_context);
5478     }
5479 }
5480
5481 /**
5482  * Callback for informing us about a successful
5483  * or unsuccessful churn start call.
5484  *
5485  * @param cls a ChurnContext
5486  * @param id the peer identity of the started peer
5487  * @param cfg the handle to the configuration of the peer
5488  * @param d handle to the daemon for the peer
5489  * @param emsg NULL on success, non-NULL on failure
5490  *
5491  */
5492 void
5493 churn_start_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5494                      const struct GNUNET_CONFIGURATION_Handle *cfg,
5495                      struct GNUNET_TESTING_Daemon *d, const char *emsg)
5496 {
5497   struct ChurnRestartContext *startup_ctx = cls;
5498   struct ChurnContext *churn_ctx = startup_ctx->churn_ctx;
5499
5500   unsigned int total_left;
5501   char *error_message;
5502
5503   error_message = NULL;
5504   if (emsg != NULL)
5505     {
5506       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5507                   "Churn stop callback failed with error `%s'\n", emsg);
5508       churn_ctx->num_failed_start++;
5509     }
5510   else
5511     {
5512       churn_ctx->num_to_start--;
5513     }
5514
5515 #if DEBUG_CHURN
5516   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5517       "Started peer, %d left.\n", churn_ctx->num_to_start);
5518 #endif
5519
5520   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
5521       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
5522
5523   if (total_left == 0)
5524     {
5525       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
5526         GNUNET_asprintf (
5527                          &error_message,
5528                          "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
5529                          churn_ctx->num_failed_start,
5530                          churn_ctx->num_failed_stop);
5531       churn_ctx->cb (churn_ctx->cb_cls, error_message);
5532       GNUNET_free_non_null (error_message);
5533       GNUNET_free (churn_ctx);
5534       GNUNET_free (startup_ctx);
5535     }
5536 }
5537
5538 static void
5539 schedule_churn_restart(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5540 {
5541   struct PeerRestartContext *peer_restart_ctx = cls;
5542   struct ChurnRestartContext *startup_ctx = peer_restart_ctx->churn_restart_ctx;
5543
5544   if (startup_ctx->outstanding > startup_ctx->pg->max_concurrent_ssh)
5545     GNUNET_SCHEDULER_add_delayed (
5546                                   GNUNET_TIME_relative_multiply (
5547                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
5548                                                                  100),
5549                                   &schedule_churn_restart, peer_restart_ctx);
5550   else
5551     {
5552       GNUNET_TESTING_daemon_start_stopped (peer_restart_ctx->daemon,
5553                                            startup_ctx->timeout,
5554                                            &churn_start_callback, startup_ctx);
5555       GNUNET_free (peer_restart_ctx);
5556     }
5557 }
5558
5559
5560 static void
5561 internal_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5562 {
5563   struct InternalStartContext *internal_context = cls;
5564
5565   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5566     {
5567       return;
5568     }
5569
5570   if ((internal_context->peer->pg->starting
5571       < internal_context->peer->pg->max_concurrent_ssh)
5572       || ((internal_context->hostname != NULL)
5573           && (count_outstanding_at_host (internal_context->hostname,
5574                                          internal_context->peer->pg)
5575               < internal_context->peer->pg->max_concurrent_ssh)))
5576     {
5577       if (internal_context->hostname != NULL)
5578         increment_outstanding_at_host (internal_context->hostname,
5579                                        internal_context->peer->pg);
5580       internal_context->peer->pg->starting++;
5581       internal_context->peer->daemon
5582           = GNUNET_TESTING_daemon_start (internal_context->peer->cfg,
5583                                          internal_context->timeout,
5584                                          GNUNET_NO,
5585                                          internal_context->hostname,
5586                                          internal_context->username,
5587                                          internal_context->sshport,
5588                                          internal_context->hostkey,
5589                                          &internal_hostkey_callback,
5590                                          internal_context,
5591                                          &internal_startup_callback,
5592                                          internal_context);
5593     }
5594   else
5595     {
5596       GNUNET_SCHEDULER_add_delayed (
5597                                     GNUNET_TIME_relative_multiply (
5598                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5599                                                                    100),
5600                                     &internal_start, internal_context);
5601     }
5602 }
5603 #if USE_START_HELPER
5604
5605 struct PeerStartHelperContext
5606 {
5607   struct GNUNET_TESTING_PeerGroup *pg;
5608
5609   struct HostData *host;
5610
5611   struct GNUNET_OS_Process *proc;
5612 };
5613
5614 static void
5615 check_peers_started (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5616 {
5617   struct PeerStartHelperContext *helper = cls;
5618   enum GNUNET_OS_ProcessStatusType type;
5619   unsigned long code;
5620   unsigned int i;
5621   GNUNET_TESTING_NotifyDaemonRunning cb;
5622
5623   if (GNUNET_NO == GNUNET_OS_process_status (helper->proc, &type, &code)) /* Still running, wait some more! */
5624   {
5625     GNUNET_SCHEDULER_add_delayed(GNUNET_CONSTANTS_EXEC_WAIT, &check_peers_started, helper);
5626     return;
5627   }
5628
5629   helper->pg->starting--;
5630   if (helper->pg->starting == 0) /* All peers have finished starting! */
5631     {
5632       /* Call the peer started callback for each peer, set proper FSM state (?) */
5633       for (i = 0; i < helper->pg->total; i++)
5634         {
5635           cb = helper->pg->peers[i].daemon->cb;
5636           helper->pg->peers[i].daemon->cb = NULL;
5637           helper->pg->peers[i].daemon->running = GNUNET_YES;
5638           helper->pg->peers[i].daemon->phase = SP_START_DONE;
5639           if (NULL != cb)
5640           {
5641             if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
5642               cb (helper->pg->peers[i].daemon->cb_cls,
5643                   &helper->pg->peers[i].daemon->id,
5644                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5645                   "Failed to execute peerStartHelper.pl, or return code bad!");
5646             else
5647               cb (helper->pg->peers[i].daemon->cb_cls,
5648                   &helper->pg->peers[i].daemon->id,
5649                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5650                   NULL);
5651
5652           }
5653
5654         }
5655     }
5656   GNUNET_OS_process_close(helper->proc);
5657 }
5658
5659 static void
5660 start_peer_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5661 {
5662   struct PeerStartHelperContext *helper = cls;
5663   char *baseservicehome;
5664   char *tempdir;
5665   char *arg;
5666   /* ssh user@host peerStartHelper /path/to/basedirectory */
5667   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (helper->pg->cfg, "PATHS", "SERVICEHOME",
5668                                                                     &baseservicehome));
5669   GNUNET_asprintf(&tempdir, "%s/%s/", baseservicehome, helper->host->hostname);
5670   if (NULL != helper->host->username)
5671     GNUNET_asprintf (&arg, "%s@%s", helper->host->username, helper->host->hostname);
5672   else
5673     GNUNET_asprintf (&arg, "%s", helper->host->hostname);
5674
5675   /* FIXME: Doesn't support ssh_port option! */
5676   helper->proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5677                                   "peerStartHelper.pl", tempdir,  NULL);
5678   GNUNET_assert(helper->proc != NULL);
5679   GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "starting peers with cmd ssh %s %s %s\n", arg, "peerStartHelper.pl", tempdir);
5680   GNUNET_SCHEDULER_add_now (&check_peers_started, helper);
5681   GNUNET_free (tempdir);
5682   GNUNET_free (baseservicehome);
5683   GNUNET_free (arg);
5684 }
5685 #endif
5686
5687 /**
5688  * Function which continues a peer group starting up
5689  * after successfully generating hostkeys for each peer.
5690  *
5691  * @param pg the peer group to continue starting
5692  *
5693  */
5694 void
5695 GNUNET_TESTING_daemons_continue_startup(struct GNUNET_TESTING_PeerGroup *pg)
5696 {
5697   unsigned int i;
5698
5699 #if USE_START_HELPER
5700   if ((pg->num_hosts > 0) && (pg->hostkey_data != NULL))
5701     {
5702       struct PeerStartHelperContext *helper;
5703       pg->starting = pg->num_hosts;
5704       for (i = 0; i < pg->num_hosts; i++)
5705         {
5706           helper = GNUNET_malloc(sizeof(struct PeerStartHelperContext));
5707           helper->pg = pg;
5708           helper->host = &pg->hosts[i];
5709           GNUNET_SCHEDULER_add_now(&start_peer_helper, helper);
5710         }
5711     }
5712   else
5713     {
5714       pg->starting = 0;
5715       for (i = 0; i < pg->total; i++)
5716         {
5717           GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5718                                     &pg->peers[i].internal_context);
5719         }
5720     }
5721 #else
5722   pg->starting = 0;
5723   for (i = 0; i < pg->total; i++)
5724     {
5725       GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5726                                 &pg->peers[i].internal_context);
5727     }
5728 #endif
5729 }
5730
5731 #if USE_START_HELPER
5732 static void
5733 call_hostkey_callbacks (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5734 {
5735   struct GNUNET_TESTING_PeerGroup *pg = cls;
5736   unsigned int i;
5737   for (i = 0; i < pg->total; i++)
5738     {
5739       if (pg->peers[i].internal_context.hostkey_callback != NULL)
5740         pg->peers[i].internal_context.hostkey_callback (pg->peers[i].internal_context.hostkey_cls,
5741                                                            &pg->peers[i].daemon->id,
5742                                                            pg->peers[i].daemon,
5743                                                            NULL);
5744     }
5745
5746   if (pg->peers[0].internal_context.hostkey_callback == NULL)
5747     GNUNET_TESTING_daemons_continue_startup (pg);
5748 }
5749 #endif
5750
5751 /**
5752  * Start count gnunet instances with the same set of transports and
5753  * applications.  The port numbers (any option called "PORT") will be
5754  * adjusted to ensure that no two peers running on the same system
5755  * have the same port(s) in their respective configurations.
5756  *
5757  * @param cfg configuration template to use
5758  * @param total number of daemons to start
5759  * @param max_concurrent_connections for testing, how many peers can
5760  *                                   we connect to simultaneously
5761  * @param max_concurrent_ssh when starting with ssh, how many ssh
5762  *        connections will we allow at once (based on remote hosts allowed!)
5763  * @param timeout total time allowed for peers to start
5764  * @param hostkey_callback function to call on each peers hostkey generation
5765  *        if NULL, peers will be started by this call, if non-null,
5766  *        GNUNET_TESTING_daemons_continue_startup must be called after
5767  *        successful hostkey generation
5768  * @param hostkey_cls closure for hostkey callback
5769  * @param cb function to call on each daemon that was started
5770  * @param cb_cls closure for cb
5771  * @param connect_callback function to call each time two hosts are connected
5772  * @param connect_callback_cls closure for connect_callback
5773  * @param hostnames linked list of host structs to use to start peers on
5774  *                  (NULL to run on localhost only)
5775  *
5776  * @return NULL on error, otherwise handle to control peer group
5777  */
5778 struct GNUNET_TESTING_PeerGroup *
5779 GNUNET_TESTING_daemons_start(const struct GNUNET_CONFIGURATION_Handle *cfg,
5780                              unsigned int total,
5781                              unsigned int max_concurrent_connections,
5782                              unsigned int max_concurrent_ssh,
5783                              struct GNUNET_TIME_Relative timeout,
5784                              GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
5785                              void *hostkey_cls,
5786                              GNUNET_TESTING_NotifyDaemonRunning cb,
5787                              void *cb_cls,
5788                              GNUNET_TESTING_NotifyConnection connect_callback,
5789                              void *connect_callback_cls,
5790                              const struct GNUNET_TESTING_Host *hostnames)
5791 {
5792   struct GNUNET_TESTING_PeerGroup *pg;
5793   const struct GNUNET_TESTING_Host *hostpos;
5794   const char *hostname;
5795   const char *username;
5796   char *baseservicehome;
5797   char *newservicehome;
5798   char *tmpdir;
5799   char *hostkeys_file;
5800   char *arg;
5801   char *ssh_port_str;
5802   struct GNUNET_DISK_FileHandle *fd;
5803   struct GNUNET_CONFIGURATION_Handle *pcfg;
5804   unsigned int off;
5805   struct OutstandingSSH *ssh_entry;
5806   unsigned int hostcnt;
5807   unsigned int i;
5808   uint16_t minport;
5809   uint16_t sshport;
5810   uint32_t upnum;
5811   uint32_t fdnum;
5812   uint64_t fs;
5813   uint64_t total_hostkeys;
5814   struct GNUNET_OS_Process *proc;
5815
5816   username = NULL;
5817   if (0 == total)
5818     {
5819       GNUNET_break (0);
5820       return NULL;
5821     }
5822
5823   upnum = 0;
5824   fdnum = 0;
5825   pg = GNUNET_malloc (sizeof (struct GNUNET_TESTING_PeerGroup));
5826   pg->cfg = cfg;
5827   pg->notify_connection = connect_callback;
5828   pg->notify_connection_cls = connect_callback_cls;
5829   pg->total = total;
5830   pg->max_timeout = GNUNET_TIME_relative_to_absolute (timeout);
5831   pg->peers = GNUNET_malloc (total * sizeof (struct PeerData));
5832   pg->max_outstanding_connections = max_concurrent_connections;
5833   pg->max_concurrent_ssh = max_concurrent_ssh;
5834   if (NULL != hostnames)
5835     {
5836       off = 0;
5837       hostpos = hostnames;
5838       while (hostpos != NULL)
5839         {
5840           hostpos = hostpos->next;
5841           off++;
5842         }
5843       pg->hosts = GNUNET_malloc (off * sizeof (struct HostData));
5844       off = 0;
5845
5846       hostpos = hostnames;
5847       while (hostpos != NULL)
5848         {
5849           pg->hosts[off].minport = LOW_PORT;
5850           pg->hosts[off].hostname = GNUNET_strdup (hostpos->hostname);
5851           if (hostpos->username != NULL)
5852             pg->hosts[off].username = GNUNET_strdup (hostpos->username);
5853           pg->hosts[off].sshport = hostpos->port;
5854           hostpos = hostpos->next;
5855           off++;
5856         }
5857
5858       if (off == 0)
5859         {
5860           pg->hosts = NULL;
5861         }
5862       hostcnt = off;
5863       minport = 0;
5864       pg->num_hosts = off;
5865     }
5866   else
5867     {
5868       hostcnt = 0;
5869       minport = LOW_PORT;
5870     }
5871
5872   /* Create the servicehome directory for each remote peer */
5873   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg, "PATHS", "SERVICEHOME",
5874                                                                     &baseservicehome));
5875   for (i = 0; i < pg->num_hosts; i++)
5876     {
5877       ssh_entry = GNUNET_malloc(sizeof(struct OutstandingSSH));
5878       ssh_entry->hostname = pg->hosts[i].hostname; /* Don't free! */
5879       GNUNET_CONTAINER_DLL_insert(pg->ssh_head, pg->ssh_tail, ssh_entry);
5880       GNUNET_asprintf(&tmpdir, "%s/%s", baseservicehome, pg->hosts[i].hostname);
5881       if (NULL != pg->hosts[i].username)
5882         GNUNET_asprintf (&arg, "%s@%s", pg->hosts[i].username,
5883                          pg->hosts[i].hostname);
5884       else
5885         GNUNET_asprintf (&arg, "%s", pg->hosts[i].hostname);
5886       if (pg->hosts[i].sshport != 0)
5887         {
5888           GNUNET_asprintf (&ssh_port_str, "%d", pg->hosts[i].sshport);
5889           proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", "-P",
5890                                           ssh_port_str,
5891 #if !DEBUG_TESTING
5892                                           "-q",
5893 #endif
5894                                           arg, "mkdir -p", tmpdir,
5895                                           NULL);
5896         }
5897       else
5898         proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5899                                         "mkdir -p", tmpdir, NULL);
5900       GNUNET_assert(proc != NULL);
5901       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5902                   "Creating remote dir with command ssh %s %s %s\n", arg,
5903                   " mkdir -p ", tmpdir);
5904       GNUNET_free(tmpdir);
5905       GNUNET_free(arg);
5906       GNUNET_OS_process_wait (proc);
5907       GNUNET_OS_process_close(proc);
5908     }
5909   GNUNET_free(baseservicehome);
5910
5911   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (cfg, "TESTING",
5912                                                            "HOSTKEYSFILE",
5913                                                            &hostkeys_file))
5914     {
5915       if (GNUNET_YES != GNUNET_DISK_file_test (hostkeys_file))
5916         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5917                     _("Could not read hostkeys file!\n"));
5918       else
5919         {
5920           /* Check hostkey file size, read entire thing into memory */
5921           fd = GNUNET_DISK_file_open (hostkeys_file,
5922                                       GNUNET_DISK_OPEN_READ,
5923                                       GNUNET_DISK_PERM_NONE);
5924           if (NULL == fd)
5925             {
5926               GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
5927                                         "open",
5928                                         hostkeys_file);
5929               GNUNET_free (hostkeys_file);
5930               for (i=0;i<pg->num_hosts;i++)
5931                 {
5932                   GNUNET_free (pg->hosts[i].hostname);
5933                   GNUNET_free_non_null (pg->hosts[i].username);
5934                 }
5935               GNUNET_free (pg->peers);
5936               GNUNET_free (pg->hosts);
5937               GNUNET_free (pg);
5938               return NULL;
5939             }
5940
5941           if (GNUNET_YES != GNUNET_DISK_file_size (hostkeys_file, &fs,
5942                                                    GNUNET_YES))
5943             fs = 0;
5944
5945           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5946                       "Found file size %llu for hostkeys, expect hostkeys to be size %d\n",
5947                       fs, HOSTKEYFILESIZE);
5948
5949           if (0 != (fs % HOSTKEYFILESIZE))
5950             {
5951               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5952                           "File size %llu seems incorrect for hostkeys...\n",
5953                           fs);
5954             }
5955           else
5956             {
5957               total_hostkeys = fs / HOSTKEYFILESIZE;
5958               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5959                           "Will read %llu hostkeys from file\n",
5960                           total_hostkeys);
5961               pg->hostkey_data = GNUNET_malloc_large (fs);
5962               GNUNET_assert (fs == GNUNET_DISK_file_read (fd, pg->hostkey_data, fs));
5963             }
5964           GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_close(fd));
5965         }
5966       GNUNET_free(hostkeys_file);
5967     }
5968
5969   for (off = 0; off < total; off++)
5970     {
5971       if (hostcnt > 0)
5972         {
5973           hostname = pg->hosts[off % hostcnt].hostname;
5974           username = pg->hosts[off % hostcnt].username;
5975           sshport = pg->hosts[off % hostcnt].sshport;
5976           pcfg = make_config (cfg, off, &pg->hosts[off % hostcnt].minport,
5977                               &upnum, hostname, &fdnum);
5978         }
5979       else
5980         {
5981           hostname = NULL;
5982           username = NULL;
5983           sshport = 0;
5984           pcfg = make_config (cfg, off, &minport, &upnum, hostname, &fdnum);
5985         }
5986
5987       if (NULL == pcfg)
5988         {
5989           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5990           ("Could not create configuration for peer number %u on `%s'!\n"),
5991                       off, hostname == NULL ? "localhost" : hostname);
5992           continue;
5993         }
5994
5995       if (GNUNET_YES
5996           == GNUNET_CONFIGURATION_get_value_string (pcfg, "PATHS",
5997                                                     "SERVICEHOME",
5998                                                     &baseservicehome))
5999         {
6000           if (hostname != NULL)
6001             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", baseservicehome, hostname, off);
6002           else
6003             GNUNET_asprintf (&newservicehome, "%s/%d/", baseservicehome, off);
6004 #if !USE_START_HELPER
6005           GNUNET_free (baseservicehome);
6006 #endif
6007         }
6008       else
6009         {
6010           tmpdir = getenv ("TMPDIR");
6011           tmpdir = tmpdir ? tmpdir : "/tmp";
6012           if (hostname != NULL)
6013             GNUNET_asprintf (&newservicehome, "%s/%s/%s/%d/", tmpdir, hostname,
6014                              "gnunet-testing-test-test", off);
6015           else
6016             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", tmpdir,
6017                              "gnunet-testing-test-test", off);
6018         }
6019       GNUNET_CONFIGURATION_set_value_string (pcfg, "PATHS", "SERVICEHOME",
6020                                              newservicehome);
6021       GNUNET_free (newservicehome);
6022       pg->peers[off].cfg = pcfg;
6023       pg->peers[off].pg = pg;
6024       pg->peers[off].internal_context.peer = &pg->peers[off];
6025       pg->peers[off].internal_context.timeout = timeout;
6026       pg->peers[off].internal_context.hostname = hostname;
6027       pg->peers[off].internal_context.username = username;
6028       pg->peers[off].internal_context.sshport = sshport;
6029       if (pg->hostkey_data != NULL)
6030         pg->peers[off].internal_context.hostkey = &pg->hostkey_data[off
6031             * HOSTKEYFILESIZE];
6032       pg->peers[off].internal_context.hostkey_callback = hostkey_callback;
6033       pg->peers[off].internal_context.hostkey_cls = hostkey_cls;
6034       pg->peers[off].internal_context.start_cb = cb;
6035       pg->peers[off].internal_context.start_cb_cls = cb_cls;
6036 #if !USE_START_HELPER
6037       GNUNET_SCHEDULER_add_now (&internal_start,
6038                                 &pg->peers[off].internal_context);
6039 #else
6040       if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6041         {
6042           pg->peers[off].daemon = GNUNET_TESTING_daemon_start (pcfg,
6043                                        timeout,
6044                                        GNUNET_YES,
6045                                        hostname,
6046                                        username,
6047                                        sshport,
6048                                        pg->peers[off].internal_context.hostkey,
6049                                        &internal_hostkey_callback,
6050                                        &pg->peers[off].internal_context,
6051                                        &internal_startup_callback,
6052                                        &pg->peers[off].internal_context);
6053           /**
6054            * At this point, given that we had a hostkeyfile,
6055            * we can call the hostkey callback!
6056            * But first, we should copy (rsync) all of the configs
6057            * and hostkeys to the remote peers.  Then let topology
6058            * creation happen, then call the peer start helper processes,
6059            * then set pg->whatever_phase for each peer and let them
6060            * enter the fsm to get the HELLO's for peers and start connecting.
6061            */
6062         }
6063       else
6064         {
6065           GNUNET_SCHEDULER_add_now (&internal_start,
6066                                     &pg->peers[off].internal_context);
6067         }
6068
6069 #endif
6070     }
6071
6072 #if USE_START_HELPER /* Now the peergroup has been set up, hostkeys and configs written to files. */
6073   if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6074     {
6075       for (off = 0; off < hostcnt; off++)
6076         {
6077           GNUNET_asprintf(&newservicehome, "%s/%s/", baseservicehome, pg->hosts[off].hostname);
6078
6079           if (NULL != username)
6080             GNUNET_asprintf (&arg, "%s@%s:%s/%s", username, pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6081           else
6082             GNUNET_asprintf (&arg, "%s:%s/%s", pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6083
6084           /* FIXME: Doesn't support ssh_port option! */
6085           proc = GNUNET_OS_start_process (NULL, NULL, "rsync", "rsync", "-r", newservicehome, arg, NULL);
6086
6087           GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "copying directory with command rsync -r %s %s\n", newservicehome, arg);
6088
6089           GNUNET_free (arg);
6090           if (NULL == proc)
6091             {
6092               GNUNET_log (
6093                           GNUNET_ERROR_TYPE_ERROR,
6094                           _
6095                           ("Could not start `%s' process to copy configuration directory.\n"),
6096                           "scp");
6097               GNUNET_assert(0);
6098             }
6099           GNUNET_OS_process_wait (proc);
6100           GNUNET_OS_process_close (proc);
6101         }
6102       /* Now all the configuration files and hostkeys are copied to the remote host.  Call the hostkey callback for each peer! */
6103       GNUNET_SCHEDULER_add_now(&call_hostkey_callbacks, pg);
6104     }
6105   GNUNET_free (baseservicehome);
6106 #endif
6107   return pg;
6108 }
6109
6110 /*
6111  * Get a daemon by number, so callers don't have to do nasty
6112  * offsetting operation.
6113  */
6114 struct GNUNET_TESTING_Daemon *
6115 GNUNET_TESTING_daemon_get(struct GNUNET_TESTING_PeerGroup *pg,
6116                           unsigned int position)
6117 {
6118   if (position < pg->total)
6119     return pg->peers[position].daemon;
6120   return NULL;
6121 }
6122
6123 /*
6124  * Get a daemon by peer identity, so callers can
6125  * retrieve the daemon without knowing it's offset.
6126  *
6127  * @param pg the peer group to retrieve the daemon from
6128  * @param peer_id the peer identity of the daemon to retrieve
6129  *
6130  * @return the daemon on success, or NULL if no such peer identity is found
6131  */
6132 struct GNUNET_TESTING_Daemon *
6133 GNUNET_TESTING_daemon_get_by_id(struct GNUNET_TESTING_PeerGroup *pg,
6134                                 struct GNUNET_PeerIdentity *peer_id)
6135 {
6136   unsigned int i;
6137
6138   for (i = 0; i < pg->total; i++)
6139     {
6140       if (0 == memcmp (&pg->peers[i].daemon->id, peer_id,
6141                        sizeof(struct GNUNET_PeerIdentity)))
6142         return pg->peers[i].daemon;
6143     }
6144   return NULL;
6145 }
6146
6147 /**
6148  * Prototype of a function that will be called when a
6149  * particular operation was completed the testing library.
6150  *
6151  * @param cls closure (a struct RestartContext)
6152  * @param id id of the peer that was restarted
6153  * @param cfg handle to the configuration of the peer
6154  * @param d handle to the daemon that was restarted
6155  * @param emsg NULL on success
6156  */
6157 static void
6158 restart_callback(void *cls, const struct GNUNET_PeerIdentity *id,
6159                  const struct GNUNET_CONFIGURATION_Handle *cfg,
6160                  struct GNUNET_TESTING_Daemon *d, const char *emsg)
6161 {
6162   struct RestartContext *restart_context = cls;
6163
6164   if (emsg == NULL)
6165     {
6166       restart_context->peers_restarted++;
6167     }
6168   else
6169     {
6170       restart_context->peers_restart_failed++;
6171     }
6172
6173   if (restart_context->peers_restarted == restart_context->peer_group->total)
6174     {
6175       restart_context->callback (restart_context->callback_cls, NULL);
6176       GNUNET_free (restart_context);
6177     }
6178   else if (restart_context->peers_restart_failed
6179       + restart_context->peers_restarted == restart_context->peer_group->total)
6180     {
6181       restart_context->callback (restart_context->callback_cls,
6182                                  "Failed to restart peers!");
6183       GNUNET_free (restart_context);
6184     }
6185
6186 }
6187
6188 /**
6189  * Callback for informing us about a successful
6190  * or unsuccessful churn stop call.
6191  *
6192  * @param cls a ChurnContext
6193  * @param emsg NULL on success, non-NULL on failure
6194  *
6195  */
6196 static void
6197 churn_stop_callback(void *cls, const char *emsg)
6198 {
6199   struct ShutdownContext *shutdown_ctx = cls;
6200   struct ChurnContext *churn_ctx = shutdown_ctx->cb_cls;
6201   unsigned int total_left;
6202   char *error_message;
6203
6204   error_message = NULL;
6205   shutdown_ctx->outstanding--;
6206
6207   if (emsg != NULL)
6208     {
6209       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6210                   "Churn stop callback failed with error `%s'\n", emsg);
6211       churn_ctx->num_failed_stop++;
6212     }
6213   else
6214     {
6215       churn_ctx->num_to_stop--;
6216     }
6217
6218 #if DEBUG_CHURN
6219   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6220       "Stopped peer, %d left.\n", churn_ctx->num_to_stop);
6221 #endif
6222   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
6223       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
6224
6225   if (total_left == 0)
6226     {
6227       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
6228         {
6229           GNUNET_asprintf (
6230                            &error_message,
6231                            "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
6232                            churn_ctx->num_failed_start,
6233                            churn_ctx->num_failed_stop);
6234         }
6235       churn_ctx->cb (churn_ctx->cb_cls, error_message);
6236       GNUNET_free_non_null (error_message);
6237       GNUNET_free (churn_ctx);
6238       GNUNET_free (shutdown_ctx);
6239     }
6240 }
6241
6242 /**
6243  * Count the number of running peers.
6244  *
6245  * @param pg handle for the peer group
6246  *
6247  * @return the number of currently running peers in the peer group
6248  */
6249 unsigned int
6250 GNUNET_TESTING_daemons_running(struct GNUNET_TESTING_PeerGroup *pg)
6251 {
6252   unsigned int i;
6253   unsigned int running = 0;
6254   for (i = 0; i < pg->total; i++)
6255     {
6256       if (pg->peers[i].daemon->running == GNUNET_YES)
6257         {
6258           GNUNET_assert (running != -1);
6259           running++;
6260         }
6261     }
6262   return running;
6263 }
6264
6265 /**
6266  * Task to rate limit the number of outstanding peer shutdown
6267  * requests.  This is necessary for making sure we don't do
6268  * too many ssh connections at once, but is generally nicer
6269  * to any system as well (graduated task starts, as opposed
6270  * to calling gnunet-arm N times all at once).
6271  */
6272 static void
6273 schedule_churn_shutdown_task(void *cls,
6274                              const struct GNUNET_SCHEDULER_TaskContext *tc)
6275 {
6276   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6277   struct ShutdownContext *shutdown_ctx;
6278   struct ChurnContext *churn_ctx;
6279   GNUNET_assert (peer_shutdown_ctx != NULL);
6280   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6281   GNUNET_assert (shutdown_ctx != NULL);
6282   churn_ctx = (struct ChurnContext *) shutdown_ctx->cb_cls;
6283   if (shutdown_ctx->outstanding > churn_ctx->pg->max_concurrent_ssh)
6284     GNUNET_SCHEDULER_add_delayed (
6285                                   GNUNET_TIME_relative_multiply (
6286                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
6287                                                                  100),
6288                                   &schedule_churn_shutdown_task,
6289                                   peer_shutdown_ctx);
6290   else
6291     {
6292       shutdown_ctx->outstanding++;
6293       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6294                                   shutdown_ctx->timeout, shutdown_ctx->cb,
6295                                   shutdown_ctx, GNUNET_NO, GNUNET_YES);
6296       GNUNET_free (peer_shutdown_ctx);
6297     }
6298 }
6299
6300
6301 /**
6302  * Simulate churn by stopping some peers (and possibly
6303  * re-starting others if churn is called multiple times).  This
6304  * function can only be used to create leave-join churn (peers "never"
6305  * leave for good).  First "voff" random peers that are currently
6306  * online will be taken offline; then "von" random peers that are then
6307  * offline will be put back online.  No notifications will be
6308  * generated for any of these operations except for the callback upon
6309  * completion.
6310  *
6311  * @param pg handle for the peer group
6312  * @param voff number of peers that should go offline
6313  * @param von number of peers that should come back online;
6314  *            must be zero on first call (since "testbed_start"
6315  *            always starts all of the peers)
6316  * @param timeout how long to wait for operations to finish before
6317  *        giving up
6318  * @param cb function to call at the end
6319  * @param cb_cls closure for cb
6320  */
6321 void
6322 GNUNET_TESTING_daemons_churn(struct GNUNET_TESTING_PeerGroup *pg,
6323                              unsigned int voff, unsigned int von,
6324                              struct GNUNET_TIME_Relative timeout,
6325                              GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6326 {
6327   struct ChurnContext *churn_ctx;
6328   struct ShutdownContext *shutdown_ctx;
6329   struct PeerShutdownContext *peer_shutdown_ctx;
6330   struct PeerRestartContext *peer_restart_ctx;
6331   struct ChurnRestartContext *churn_startup_ctx;
6332
6333   unsigned int running;
6334   unsigned int stopped;
6335   unsigned int total_running;
6336   unsigned int total_stopped;
6337   unsigned int i;
6338   unsigned int *running_arr;
6339   unsigned int *stopped_arr;
6340   unsigned int *running_permute;
6341   unsigned int *stopped_permute;
6342
6343   shutdown_ctx = NULL;
6344   peer_shutdown_ctx = NULL;
6345   peer_restart_ctx = NULL;
6346   churn_startup_ctx = NULL;
6347
6348   running = 0;
6349   stopped = 0;
6350
6351   if ((von == 0) && (voff == 0)) /* No peers at all? */
6352     {
6353       cb (cb_cls, NULL);
6354       return;
6355     }
6356
6357   for (i = 0; i < pg->total; i++)
6358     {
6359       if (pg->peers[i].daemon->running == GNUNET_YES)
6360         {
6361           GNUNET_assert (running != -1);
6362           running++;
6363         }
6364       else
6365         {
6366           GNUNET_assert (stopped != -1);
6367           stopped++;
6368         }
6369     }
6370
6371   if (voff > running)
6372     {
6373       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6374                   "Trying to stop more peers than are currently running!\n");
6375       cb (cb_cls, "Trying to stop more peers than are currently running!");
6376       return;
6377     }
6378
6379   if (von > stopped)
6380     {
6381       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6382                   "Trying to start more peers than are currently stopped!\n");
6383       cb (cb_cls, "Trying to start more peers than are currently stopped!");
6384       return;
6385     }
6386
6387   churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6388
6389   running_arr = NULL;
6390   if (running > 0)
6391     running_arr = GNUNET_malloc (running * sizeof (unsigned int));
6392
6393   stopped_arr = NULL;
6394   if (stopped > 0)
6395     stopped_arr = GNUNET_malloc (stopped * sizeof (unsigned int));
6396
6397   running_permute = NULL;
6398   stopped_permute = NULL;
6399
6400   if (running > 0)
6401     running_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6402                                                     running);
6403   if (stopped > 0)
6404     stopped_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6405                                                     stopped);
6406
6407   total_running = running;
6408   total_stopped = stopped;
6409   running = 0;
6410   stopped = 0;
6411
6412   churn_ctx->num_to_start = von;
6413   churn_ctx->num_to_stop = voff;
6414   churn_ctx->cb = cb;
6415   churn_ctx->cb_cls = cb_cls;
6416   churn_ctx->pg = pg;
6417
6418   for (i = 0; i < pg->total; i++)
6419     {
6420       if (pg->peers[i].daemon->running == GNUNET_YES)
6421         {
6422           GNUNET_assert ((running_arr != NULL) && (total_running > running));
6423           running_arr[running] = i;
6424           running++;
6425         }
6426       else
6427         {
6428           GNUNET_assert ((stopped_arr != NULL) && (total_stopped > stopped));
6429           stopped_arr[stopped] = i;
6430           stopped++;
6431         }
6432     }
6433
6434   GNUNET_assert (running >= voff);
6435   if (voff > 0)
6436     {
6437       shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6438       shutdown_ctx->cb = &churn_stop_callback;
6439       shutdown_ctx->cb_cls = churn_ctx;
6440       shutdown_ctx->total_peers = voff;
6441       shutdown_ctx->timeout = timeout;
6442     }
6443
6444   for (i = 0; i < voff; i++)
6445     {
6446 #if DEBUG_CHURN
6447       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Stopping peer %d!\n",
6448           running_permute[i]);
6449 #endif
6450       GNUNET_assert (running_arr != NULL);
6451       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6452       peer_shutdown_ctx->daemon
6453           = pg->peers[running_arr[running_permute[i]]].daemon;
6454       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6455       GNUNET_SCHEDULER_add_now (&schedule_churn_shutdown_task,
6456                                 peer_shutdown_ctx);
6457
6458       /*
6459        GNUNET_TESTING_daemon_stop (pg->peers[running_arr[running_permute[i]]].daemon,
6460        timeout,
6461        &churn_stop_callback, churn_ctx,
6462        GNUNET_NO, GNUNET_YES); */
6463     }
6464
6465   GNUNET_assert (stopped >= von);
6466   if (von > 0)
6467     {
6468       churn_startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6469       churn_startup_ctx->churn_ctx = churn_ctx;
6470       churn_startup_ctx->timeout = timeout;
6471       churn_startup_ctx->pg = pg;
6472     }
6473   for (i = 0; i < von; i++)
6474     {
6475 #if DEBUG_CHURN
6476       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Starting up peer %d!\n",
6477           stopped_permute[i]);
6478 #endif
6479       GNUNET_assert (stopped_arr != NULL);
6480       peer_restart_ctx = GNUNET_malloc (sizeof (struct PeerRestartContext));
6481       peer_restart_ctx->churn_restart_ctx = churn_startup_ctx;
6482       peer_restart_ctx->daemon
6483           = pg->peers[stopped_arr[stopped_permute[i]]].daemon;
6484       GNUNET_SCHEDULER_add_now (&schedule_churn_restart, peer_restart_ctx);
6485       /*
6486        GNUNET_TESTING_daemon_start_stopped(pg->peers[stopped_arr[stopped_permute[i]]].daemon,
6487        timeout, &churn_start_callback, churn_ctx); */
6488     }
6489
6490   GNUNET_free_non_null (running_arr);
6491   GNUNET_free_non_null (stopped_arr);
6492   GNUNET_free_non_null (running_permute);
6493   GNUNET_free_non_null (stopped_permute);
6494 }
6495
6496
6497 /**
6498  * Restart all peers in the given group.
6499  *
6500  * @param pg the handle to the peer group
6501  * @param callback function to call on completion (or failure)
6502  * @param callback_cls closure for the callback function
6503  */
6504 void
6505 GNUNET_TESTING_daemons_restart(struct GNUNET_TESTING_PeerGroup *pg,
6506                                GNUNET_TESTING_NotifyCompletion callback,
6507                                void *callback_cls)
6508 {
6509   struct RestartContext *restart_context;
6510   unsigned int off;
6511
6512   if (pg->total > 0)
6513     {
6514       restart_context = GNUNET_malloc (sizeof (struct RestartContext));
6515       restart_context->peer_group = pg;
6516       restart_context->peers_restarted = 0;
6517       restart_context->callback = callback;
6518       restart_context->callback_cls = callback_cls;
6519
6520       for (off = 0; off < pg->total; off++)
6521         {
6522           GNUNET_TESTING_daemon_restart (pg->peers[off].daemon,
6523                                          &restart_callback, restart_context);
6524         }
6525     }
6526 }
6527
6528
6529 /**
6530  * Start or stop an individual peer from the given group.
6531  *
6532  * @param pg handle to the peer group
6533  * @param offset which peer to start or stop
6534  * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
6535  * @param timeout how long to wait for shutdown
6536  * @param cb function to call at the end
6537  * @param cb_cls closure for cb
6538  */
6539 void
6540 GNUNET_TESTING_daemons_vary(struct GNUNET_TESTING_PeerGroup *pg,
6541                             unsigned int offset, int desired_status,
6542                             struct GNUNET_TIME_Relative timeout,
6543                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6544 {
6545   struct ShutdownContext *shutdown_ctx;
6546   struct ChurnRestartContext *startup_ctx;
6547   struct ChurnContext *churn_ctx;
6548
6549   if (GNUNET_NO == desired_status)
6550     {
6551       if (NULL != pg->peers[offset].daemon)
6552         {
6553           shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6554           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6555           churn_ctx->num_to_start = 0;
6556           churn_ctx->num_to_stop = 1;
6557           churn_ctx->cb = cb;
6558           churn_ctx->cb_cls = cb_cls;
6559           shutdown_ctx->cb_cls = churn_ctx;
6560           GNUNET_TESTING_daemon_stop (pg->peers[offset].daemon, timeout,
6561                                       &churn_stop_callback, shutdown_ctx,
6562                                       GNUNET_NO, GNUNET_YES);
6563         }
6564     }
6565   else if (GNUNET_YES == desired_status)
6566     {
6567       if (NULL == pg->peers[offset].daemon)
6568         {
6569           startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6570           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6571           churn_ctx->num_to_start = 1;
6572           churn_ctx->num_to_stop = 0;
6573           churn_ctx->cb = cb;
6574           churn_ctx->cb_cls = cb_cls;
6575           startup_ctx->churn_ctx = churn_ctx;
6576           GNUNET_TESTING_daemon_start_stopped (pg->peers[offset].daemon,
6577                                                timeout, &churn_start_callback,
6578                                                startup_ctx);
6579         }
6580     }
6581   else
6582     GNUNET_break (0);
6583 }
6584
6585
6586 /**
6587  * Callback for shutting down peers in a peer group.
6588  *
6589  * @param cls closure (struct ShutdownContext)
6590  * @param emsg NULL on success
6591  */
6592 static void
6593 internal_shutdown_callback(void *cls, const char *emsg)
6594 {
6595   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6596   struct ShutdownContext *shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6597   unsigned int off;
6598   struct OutstandingSSH *ssh_pos;
6599
6600   shutdown_ctx->outstanding--;
6601   if (peer_shutdown_ctx->daemon->hostname != NULL)
6602     decrement_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6603                                    shutdown_ctx->pg);
6604
6605   if (emsg == NULL)
6606     {
6607       shutdown_ctx->peers_down++;
6608     }
6609   else
6610     {
6611       shutdown_ctx->peers_failed++;
6612     }
6613
6614   if ((shutdown_ctx->cb != NULL) && (shutdown_ctx->peers_down
6615       + shutdown_ctx->peers_failed == shutdown_ctx->total_peers))
6616     {
6617       if (shutdown_ctx->peers_failed > 0)
6618         shutdown_ctx->cb (shutdown_ctx->cb_cls,
6619                           "Not all peers successfully shut down!");
6620       else
6621         shutdown_ctx->cb (shutdown_ctx->cb_cls, NULL);
6622
6623       GNUNET_free (shutdown_ctx->pg->peers);
6624       GNUNET_free_non_null(shutdown_ctx->pg->hostkey_data);
6625       for (off = 0; off < shutdown_ctx->pg->num_hosts; off++)
6626         {
6627           GNUNET_free (shutdown_ctx->pg->hosts[off].hostname);
6628           GNUNET_free_non_null (shutdown_ctx->pg->hosts[off].username);
6629         }
6630       GNUNET_free_non_null (shutdown_ctx->pg->hosts);
6631       while (NULL != (ssh_pos = shutdown_ctx->pg->ssh_head))
6632         {
6633           GNUNET_CONTAINER_DLL_remove(shutdown_ctx->pg->ssh_head, shutdown_ctx->pg->ssh_tail, ssh_pos);
6634           GNUNET_free(ssh_pos);
6635         }
6636       GNUNET_free (shutdown_ctx->pg);
6637       GNUNET_free (shutdown_ctx);
6638     }
6639   GNUNET_free(peer_shutdown_ctx);
6640 }
6641
6642
6643 /**
6644  * Task to rate limit the number of outstanding peer shutdown
6645  * requests.  This is necessary for making sure we don't do
6646  * too many ssh connections at once, but is generally nicer
6647  * to any system as well (graduated task starts, as opposed
6648  * to calling gnunet-arm N times all at once).
6649  */
6650 static void
6651 schedule_shutdown_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6652 {
6653   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6654   struct ShutdownContext *shutdown_ctx;
6655
6656   GNUNET_assert (peer_shutdown_ctx != NULL);
6657   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6658   GNUNET_assert (shutdown_ctx != NULL);
6659
6660   if ((shutdown_ctx->outstanding < shutdown_ctx->pg->max_concurrent_ssh)
6661       || ((peer_shutdown_ctx->daemon->hostname != NULL)
6662           && (count_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6663                                          shutdown_ctx->pg)
6664               < shutdown_ctx->pg->max_concurrent_ssh)))
6665     {
6666       if (peer_shutdown_ctx->daemon->hostname != NULL)
6667         increment_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6668                                        shutdown_ctx->pg);
6669       shutdown_ctx->outstanding++;
6670       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6671                                   shutdown_ctx->timeout,
6672                                   &internal_shutdown_callback, peer_shutdown_ctx,
6673                                   GNUNET_YES, GNUNET_NO);
6674     }
6675   else
6676     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
6677                                                                  100),
6678                                   &schedule_shutdown_task, peer_shutdown_ctx);
6679
6680 }
6681
6682
6683 /**
6684  * Shutdown all peers started in the given group.
6685  *
6686  * @param pg handle to the peer group
6687  * @param timeout how long to wait for shutdown
6688  * @param cb callback to notify upon success or failure
6689  * @param cb_cls closure for cb
6690  */
6691 void
6692 GNUNET_TESTING_daemons_stop(struct GNUNET_TESTING_PeerGroup *pg,
6693                             struct GNUNET_TIME_Relative timeout,
6694                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6695 {
6696   unsigned int off;
6697   struct ShutdownContext *shutdown_ctx;
6698   struct PeerShutdownContext *peer_shutdown_ctx;
6699 #if OLD
6700   struct PeerConnection *conn_iter;
6701   struct PeerConnection *temp_conn;
6702 #endif
6703
6704   GNUNET_assert (pg->total > 0);
6705
6706   shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6707   shutdown_ctx->cb = cb;
6708   shutdown_ctx->cb_cls = cb_cls;
6709   shutdown_ctx->total_peers = pg->total;
6710   shutdown_ctx->timeout = timeout;
6711   shutdown_ctx->pg = pg;
6712   /* shtudown_ctx->outstanding = 0; */
6713
6714   for (off = 0; off < pg->total; off++)
6715     {
6716       GNUNET_assert (NULL != pg->peers[off].daemon);
6717       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6718       peer_shutdown_ctx->daemon = pg->peers[off].daemon;
6719       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6720       GNUNET_SCHEDULER_add_now (&schedule_shutdown_task, peer_shutdown_ctx);
6721
6722       if (NULL != pg->peers[off].cfg)
6723       {
6724         GNUNET_CONFIGURATION_destroy (pg->peers[off].cfg);
6725         pg->peers[off].cfg = NULL;
6726       }
6727 #if OLD
6728       conn_iter = pg->peers[off].allowed_peers_head;
6729       while (conn_iter != NULL)
6730         {
6731           temp_conn = conn_iter->next;
6732           GNUNET_free(conn_iter);
6733           conn_iter = temp_conn;
6734         }
6735
6736       conn_iter = pg->peers[off].connect_peers_head;
6737       while (conn_iter != NULL)
6738         {
6739           temp_conn = conn_iter->next;
6740           GNUNET_free(conn_iter);
6741           conn_iter = temp_conn;
6742         }
6743
6744       conn_iter = pg->peers[off].blacklisted_peers_head;
6745       while (conn_iter != NULL)
6746         {
6747           temp_conn = conn_iter->next;
6748           GNUNET_free(conn_iter);
6749           conn_iter = temp_conn;
6750         }
6751
6752       conn_iter = pg->peers[off].connect_peers_working_set_head;
6753       while (conn_iter != NULL)
6754         {
6755           temp_conn = conn_iter->next;
6756           GNUNET_free(conn_iter);
6757           conn_iter = temp_conn;
6758         }
6759 #else
6760       if (pg->peers[off].allowed_peers != NULL)
6761         GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].allowed_peers);
6762       if (pg->peers[off].connect_peers != NULL)
6763         GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].connect_peers);
6764       if (pg->peers[off].blacklisted_peers != NULL)
6765         GNUNET_CONTAINER_multihashmap_destroy (pg->
6766                                                peers[off].blacklisted_peers);
6767 #endif
6768     }
6769 }
6770
6771 /* end of testing_group.c */