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       /* FIXME: REMOVE FOREVER HACK HACK HACK */
1313       if (0 == strcasecmp (section, "transport-tcp"))
1314         GNUNET_CONFIGURATION_set_value_string (ctx->ret, section, "ADVERTISED_PORT", value);
1315     }
1316
1317   if (0 == strcmp (option, "UNIXPATH"))
1318     {
1319       if (GNUNET_YES != GNUNET_CONFIGURATION_get_value_yesno (ctx->orig,
1320                                                               "testing",
1321                                                               single_variable))
1322         {
1323           GNUNET_snprintf (uval, sizeof(uval), "/tmp/test-service-%s-%u",
1324                            section, ctx->upnum++);
1325           value = uval;
1326         }
1327       else if ((GNUNET_YES
1328           == GNUNET_CONFIGURATION_get_value_number (ctx->orig, "testing",
1329                                                     per_host_variable,
1330                                                     &num_per_host))
1331           && (num_per_host > 0))
1332
1333         {
1334           GNUNET_snprintf (uval, sizeof(uval), "/tmp/test-service-%s-%u",
1335                            section, ctx->fdnum % num_per_host);
1336           value = uval;
1337         }
1338     }
1339
1340   if ((0 == strcmp (option, "HOSTNAME")) && (ctx->hostname != NULL))
1341     {
1342       value = ctx->hostname;
1343     }
1344   GNUNET_free (single_variable);
1345   GNUNET_free (per_host_variable);
1346   GNUNET_CONFIGURATION_set_value_string (ctx->ret, section, option, value);
1347 }
1348
1349 /**
1350  * Create a new configuration using the given configuration
1351  * as a template; however, each PORT in the existing cfg
1352  * must be renumbered by incrementing "*port".  If we run
1353  * out of "*port" numbers, return NULL.
1354  *
1355  * @param cfg template configuration
1356  * @param off the current peer offset
1357  * @param port port numbers to use, update to reflect
1358  *             port numbers that were used
1359  * @param upnum number to make unix domain socket names unique
1360  * @param hostname hostname of the controlling host, to allow control connections from
1361  * @param fdnum number used to offset the unix domain socket for grouped processes
1362  *              (such as statistics or peerinfo, which can be shared among others)
1363  *
1364  * @return new configuration, NULL on error
1365  */
1366 static struct GNUNET_CONFIGURATION_Handle *
1367 make_config(const struct GNUNET_CONFIGURATION_Handle *cfg, uint32_t off,
1368             uint16_t * port, uint32_t * upnum, const char *hostname,
1369             uint32_t * fdnum)
1370 {
1371   struct UpdateContext uc;
1372   uint16_t orig;
1373   char *control_host;
1374   char *allowed_hosts;
1375
1376   orig = *port;
1377   uc.nport = *port;
1378   uc.upnum = *upnum;
1379   uc.fdnum = *fdnum;
1380   uc.ret = GNUNET_CONFIGURATION_create ();
1381   uc.hostname = hostname;
1382   uc.orig = cfg;
1383
1384   GNUNET_CONFIGURATION_iterate (cfg, &update_config, &uc);
1385   if (uc.nport >= HIGH_PORT)
1386     {
1387       *port = orig;
1388       GNUNET_CONFIGURATION_destroy (uc.ret);
1389       return NULL;
1390     }
1391
1392   if (GNUNET_CONFIGURATION_get_value_string (cfg, "testing", "control_host",
1393                                              &control_host) == GNUNET_OK)
1394     {
1395       if (hostname != NULL)
1396         GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1; %s;", control_host,
1397                          hostname);
1398       else
1399         GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1;", control_host);
1400
1401       GNUNET_CONFIGURATION_set_value_string (uc.ret, "core", "ACCEPT_FROM",
1402                                              allowed_hosts);
1403       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport",
1404                                              "ACCEPT_FROM", allowed_hosts);
1405       GNUNET_CONFIGURATION_set_value_string (uc.ret, "dht", "ACCEPT_FROM",
1406                                              allowed_hosts);
1407       GNUNET_CONFIGURATION_set_value_string (uc.ret, "statistics",
1408                                              "ACCEPT_FROM", allowed_hosts);
1409
1410       GNUNET_CONFIGURATION_set_value_string (uc.ret, "core", "UNIXPATH", "");
1411       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport", "UNIXPATH",
1412                                              "");
1413       GNUNET_CONFIGURATION_set_value_string (uc.ret, "dht", "UNIXPATH", "");
1414       GNUNET_CONFIGURATION_set_value_string (uc.ret, "statistics", "UNIXPATH",
1415                                              "");
1416
1417       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1418                                              "YES");
1419       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1420                                              "YES");
1421       GNUNET_free_non_null (control_host);
1422       GNUNET_free (allowed_hosts);
1423     }
1424
1425   /* arm needs to know to allow connections from the host on which it is running,
1426    * otherwise gnunet-arm is unable to connect to it in some instances */
1427   if (hostname != NULL)
1428     {
1429       GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1;", hostname);
1430       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1431                                              hostname);
1432       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1433                                              hostname);
1434       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1435                                              "YES");
1436       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1437                                              "YES");
1438       GNUNET_CONFIGURATION_set_value_string (uc.ret, "arm", "ACCEPT_FROM",
1439                                              allowed_hosts);
1440       GNUNET_free (allowed_hosts);
1441     }
1442   else
1443     {
1444       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1445                                              "127.0.0.1");
1446       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1447                                              "127.0.0.1");
1448       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1449                                              "YES");
1450       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1451                                              "YES");
1452     }
1453
1454   *port = (uint16_t) uc.nport;
1455   *upnum = uc.upnum;
1456   uc.fdnum++;
1457   *fdnum = uc.fdnum;
1458   return uc.ret;
1459 }
1460
1461 /*
1462  * Remove entries from the peer connection list
1463  *
1464  * @param pg the peer group we are working with
1465  * @param first index of the first peer
1466  * @param second index of the second peer
1467  * @param list the peer list to use
1468  * @param check UNUSED
1469  *
1470  * @return the number of connections added (can be 0, 1 or 2)
1471  *
1472  */
1473 static unsigned int
1474 remove_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1475                    unsigned int second, enum PeerLists list, unsigned int check)
1476 {
1477   int removed;
1478 #if OLD
1479   struct PeerConnection **first_list;
1480   struct PeerConnection **second_list;
1481   struct PeerConnection *first_iter;
1482   struct PeerConnection *second_iter;
1483   struct PeerConnection **first_tail;
1484   struct PeerConnection **second_tail;
1485
1486 #else
1487   GNUNET_HashCode hash_first;
1488   GNUNET_HashCode hash_second;
1489
1490   hash_from_uid (first, &hash_first);
1491   hash_from_uid (second, &hash_second);
1492 #endif
1493
1494   removed = 0;
1495 #if OLD
1496   switch (list)
1497     {
1498   case ALLOWED:
1499     first_list = &pg->peers[first].allowed_peers_head;
1500     second_list = &pg->peers[second].allowed_peers_head;
1501     first_tail = &pg->peers[first].allowed_peers_tail;
1502     second_tail = &pg->peers[second].allowed_peers_tail;
1503     break;
1504   case CONNECT:
1505     first_list = &pg->peers[first].connect_peers_head;
1506     second_list = &pg->peers[second].connect_peers_head;
1507     first_tail = &pg->peers[first].connect_peers_tail;
1508     second_tail = &pg->peers[second].connect_peers_tail;
1509     break;
1510   case BLACKLIST:
1511     first_list = &pg->peers[first].blacklisted_peers_head;
1512     second_list = &pg->peers[second].blacklisted_peers_head;
1513     first_tail = &pg->peers[first].blacklisted_peers_tail;
1514     second_tail = &pg->peers[second].blacklisted_peers_tail;
1515     break;
1516   case WORKING_SET:
1517     first_list = &pg->peers[first].connect_peers_working_set_head;
1518     second_list = &pg->peers[second].connect_peers_working_set_head;
1519     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1520     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1521     break;
1522   default:
1523     GNUNET_break(0);
1524     return 0;
1525     }
1526
1527   first_iter = *first_list;
1528   while (first_iter != NULL)
1529     {
1530       if (first_iter->index == second)
1531         {
1532           GNUNET_CONTAINER_DLL_remove(*first_list, *first_tail, first_iter);
1533           GNUNET_free(first_iter);
1534           removed++;
1535           break;
1536         }
1537       first_iter = first_iter->next;
1538     }
1539
1540   second_iter = *second_list;
1541   while (second_iter != NULL)
1542     {
1543       if (second_iter->index == first)
1544         {
1545           GNUNET_CONTAINER_DLL_remove(*second_list, *second_tail, second_iter);
1546           GNUNET_free(second_iter);
1547           removed++;
1548           break;
1549         }
1550       second_iter = second_iter->next;
1551     }
1552 #else
1553   if (GNUNET_YES ==
1554       GNUNET_CONTAINER_multihashmap_contains (pg->peers[first].blacklisted_peers,
1555           &hash_second))
1556     {
1557       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[first].blacklisted_peers,
1558           &hash_second);
1559     }
1560
1561   if (GNUNET_YES ==
1562       GNUNET_CONTAINER_multihashmap_contains (pg->peers[second].blacklisted_peers,
1563           &hash_first))
1564     {
1565       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[second].blacklisted_peers,
1566           &hash_first);
1567     }
1568 #endif
1569
1570   return removed;
1571 }
1572
1573 /*
1574  * Add entries to the some list
1575  *
1576  * @param pg the peer group we are working with
1577  * @param first index of the first peer
1578  * @param second index of the second peer
1579  * @param list the list type that we should modify
1580  * @param check GNUNET_YES to check lists before adding
1581  *              GNUNET_NO to force add
1582  *
1583  * @return the number of connections added (can be 0, 1 or 2)
1584  *
1585  */
1586 static unsigned int
1587 add_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1588                 unsigned int second, enum PeerLists list, unsigned int check)
1589 {
1590   int added;
1591   int add_first;
1592   int add_second;
1593
1594   struct PeerConnection **first_list;
1595   struct PeerConnection **second_list;
1596   struct PeerConnection *first_iter;
1597   struct PeerConnection *second_iter;
1598   struct PeerConnection *new_first;
1599   struct PeerConnection *new_second;
1600   struct PeerConnection **first_tail;
1601   struct PeerConnection **second_tail;
1602
1603   switch (list)
1604     {
1605   case ALLOWED:
1606     first_list = &pg->peers[first].allowed_peers_head;
1607     second_list = &pg->peers[second].allowed_peers_head;
1608     first_tail = &pg->peers[first].allowed_peers_tail;
1609     second_tail = &pg->peers[second].allowed_peers_tail;
1610     break;
1611   case CONNECT:
1612     first_list = &pg->peers[first].connect_peers_head;
1613     second_list = &pg->peers[second].connect_peers_head;
1614     first_tail = &pg->peers[first].connect_peers_tail;
1615     second_tail = &pg->peers[second].connect_peers_tail;
1616     break;
1617   case BLACKLIST:
1618     first_list = &pg->peers[first].blacklisted_peers_head;
1619     second_list = &pg->peers[second].blacklisted_peers_head;
1620     first_tail = &pg->peers[first].blacklisted_peers_tail;
1621     second_tail = &pg->peers[second].blacklisted_peers_tail;
1622     break;
1623   case WORKING_SET:
1624     first_list = &pg->peers[first].connect_peers_working_set_head;
1625     second_list = &pg->peers[second].connect_peers_working_set_head;
1626     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1627     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1628     break;
1629   default:
1630     GNUNET_break(0);
1631     return 0;
1632     }
1633
1634   add_first = GNUNET_YES;
1635   add_second = GNUNET_YES;
1636
1637   if (check == GNUNET_YES)
1638     {
1639       first_iter = *first_list;
1640       while (first_iter != NULL)
1641         {
1642           if (first_iter->index == second)
1643             {
1644               add_first = GNUNET_NO;
1645               break;
1646             }
1647           first_iter = first_iter->next;
1648         }
1649
1650       second_iter = *second_list;
1651       while (second_iter != NULL)
1652         {
1653           if (second_iter->index == first)
1654             {
1655               add_second = GNUNET_NO;
1656               break;
1657             }
1658           second_iter = second_iter->next;
1659         }
1660     }
1661
1662   added = 0;
1663   if (add_first)
1664     {
1665       new_first = GNUNET_malloc (sizeof (struct PeerConnection));
1666       new_first->index = second;
1667       GNUNET_CONTAINER_DLL_insert(*first_list, *first_tail, new_first);
1668       pg->peers[first].num_connections++;
1669       added++;
1670     }
1671
1672   if (add_second)
1673     {
1674       new_second = GNUNET_malloc (sizeof (struct PeerConnection));
1675       new_second->index = first;
1676       GNUNET_CONTAINER_DLL_insert(*second_list, *second_tail, new_second);
1677       pg->peers[second].num_connections++;
1678       added++;
1679     }
1680
1681   return added;
1682 }
1683
1684 /**
1685  * Scale free network construction as described in:
1686  *
1687  * "Emergence of Scaling in Random Networks." Science 286, 509-512, 1999.
1688  *
1689  * Start with a network of "one" peer, then progressively add
1690  * peers up to the total number.  At each step, iterate over
1691  * all possible peers and connect new peer based on number of
1692  * existing connections of the target peer.
1693  *
1694  * @param pg the peer group we are dealing with
1695  * @param proc the connection processor to use
1696  * @param list the peer list to use
1697  *
1698  * @return the number of connections created
1699  */
1700 static unsigned int
1701 create_scale_free(struct GNUNET_TESTING_PeerGroup *pg,
1702                   GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
1703 {
1704
1705   unsigned int total_connections;
1706   unsigned int outer_count;
1707   unsigned int i;
1708   unsigned int previous_total_connections;
1709   double random;
1710   double probability;
1711
1712   GNUNET_assert (pg->total > 1);
1713
1714   /* Add a connection between the first two nodes */
1715   total_connections = proc (pg, 0, 1, list, GNUNET_YES);
1716
1717   for (outer_count = 1; outer_count < pg->total; outer_count++)
1718     {
1719       previous_total_connections = total_connections;
1720       for (i = 0; i < outer_count; i++)
1721         {
1722           probability = pg->peers[i].num_connections
1723               / (double) previous_total_connections;
1724           random
1725               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1726                                                     UINT64_MAX))
1727                   / ((double) UINT64_MAX);
1728 #if VERBOSE_TESTING
1729           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1730               "Considering connecting peer %d to peer %d\n",
1731               outer_count, i);
1732 #endif
1733           if (random < probability)
1734             {
1735 #if VERBOSE_TESTING
1736               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1737                   "Connecting peer %d to peer %d\n", outer_count, i);
1738 #endif
1739               total_connections += proc (pg, outer_count, i, list, GNUNET_YES);
1740             }
1741         }
1742     }
1743
1744   return total_connections;
1745 }
1746
1747 /**
1748  * Create a topology given a peer group (set of running peers)
1749  * and a connection processor.  Creates a small world topology
1750  * according to the rewired ring construction.  The basic
1751  * behavior is that a ring topology is created, but with some
1752  * probability instead of connecting a peer to the next
1753  * neighbor in the ring a connection will be created to a peer
1754  * selected uniformly at random.   We use the TESTING
1755  * PERCENTAGE option to specify what number of
1756  * connections each peer should have.  Default is 2,
1757  * which makes the ring, any given number is multiplied by
1758  * the log of the network size; i.e. a PERCENTAGE of 2 makes
1759  * each peer have on average 2logn connections.  The additional
1760  * connections are made at increasing distance around the ring
1761  * from the original peer, or to random peers based on the re-
1762  * wiring probability. The TESTING
1763  * PROBABILITY option is used as the probability that a given
1764  * connection is rewired.
1765  *
1766  * @param pg the peergroup to create the topology on
1767  * @param proc the connection processor to call to actually set
1768  *        up connections between two peers
1769  * @param list the peer list to use
1770  *
1771  * @return the number of connections that were set up
1772  *
1773  */
1774 static unsigned int
1775 create_small_world_ring(struct GNUNET_TESTING_PeerGroup *pg,
1776                         GNUNET_TESTING_ConnectionProcessor proc,
1777                         enum PeerLists list)
1778 {
1779   unsigned int i, j;
1780   int nodeToConnect;
1781   unsigned int natLog;
1782   unsigned int randomPeer;
1783   double random, logNModifier, probability;
1784   unsigned int smallWorldConnections;
1785   int connsPerPeer;
1786   char *p_string;
1787   int max;
1788   int min;
1789   unsigned int useAnd;
1790   int connect_attempts;
1791
1792   logNModifier = 0.5; /* FIXME: default value? */
1793   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1794                                                           "PERCENTAGE",
1795                                                           &p_string))
1796     {
1797       if (sscanf (p_string, "%lf", &logNModifier) != 1)
1798         GNUNET_log (
1799                     GNUNET_ERROR_TYPE_WARNING,
1800                     _
1801                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1802                     p_string, "LOGNMODIFIER", "TESTING");
1803       GNUNET_free (p_string);
1804     }
1805   probability = 0.5; /* FIXME: default percentage? */
1806   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1807                                                           "PROBABILITY",
1808                                                           &p_string))
1809     {
1810       if (sscanf (p_string, "%lf", &probability) != 1)
1811         GNUNET_log (
1812                     GNUNET_ERROR_TYPE_WARNING,
1813                     _
1814                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1815                     p_string, "PERCENTAGE", "TESTING");
1816       GNUNET_free (p_string);
1817     }
1818   natLog = log (pg->total);
1819   connsPerPeer = ceil (natLog * logNModifier);
1820
1821   if (connsPerPeer % 2 == 1)
1822     connsPerPeer += 1;
1823
1824   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Target is %d connections per peer."),
1825               connsPerPeer);
1826
1827   smallWorldConnections = 0;
1828   connect_attempts = 0;
1829   for (i = 0; i < pg->total; i++)
1830     {
1831       useAnd = 0;
1832       max = i + connsPerPeer / 2;
1833       min = i - connsPerPeer / 2;
1834
1835       if (max > pg->total - 1)
1836         {
1837           max = max - pg->total;
1838           useAnd = 1;
1839         }
1840
1841       if (min < 0)
1842         {
1843           min = pg->total - 1 + min;
1844           useAnd = 1;
1845         }
1846
1847       for (j = 0; j < connsPerPeer / 2; j++)
1848         {
1849           random
1850               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1851                                                     UINT64_MAX)
1852                   / ((double) UINT64_MAX));
1853           if (random < probability)
1854             {
1855               /* Connect to uniformly selected random peer */
1856               randomPeer
1857                   = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1858                                               pg->total);
1859               while ((((randomPeer < max) && (randomPeer > min)) && (useAnd
1860                   == 0)) || (((randomPeer > min) || (randomPeer < max))
1861                   && (useAnd == 1)))
1862                 {
1863                   randomPeer
1864                       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1865                                                   pg->total);
1866                 }
1867               smallWorldConnections += proc (pg, i, randomPeer, list,
1868                                              GNUNET_YES);
1869             }
1870           else
1871             {
1872               nodeToConnect = i + j + 1;
1873               if (nodeToConnect > pg->total - 1)
1874                 {
1875                   nodeToConnect = nodeToConnect - pg->total;
1876                 }
1877               connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
1878             }
1879         }
1880
1881     }
1882
1883   connect_attempts += smallWorldConnections;
1884
1885   return connect_attempts;
1886 }
1887
1888 /**
1889  * Create a topology given a peer group (set of running peers)
1890  * and a connection processor.
1891  *
1892  * @param pg the peergroup to create the topology on
1893  * @param proc the connection processor to call to actually set
1894  *        up connections between two peers
1895  * @param list the peer list to use
1896  *
1897  * @return the number of connections that were set up
1898  *
1899  */
1900 static unsigned int
1901 create_nated_internet(struct GNUNET_TESTING_PeerGroup *pg,
1902                       GNUNET_TESTING_ConnectionProcessor proc,
1903                       enum PeerLists list)
1904 {
1905   unsigned int outer_count, inner_count;
1906   unsigned int cutoff;
1907   int connect_attempts;
1908   double nat_percentage;
1909   char *p_string;
1910
1911   nat_percentage = 0.6; /* FIXME: default percentage? */
1912   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1913                                                           "PERCENTAGE",
1914                                                           &p_string))
1915     {
1916       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1917         GNUNET_log (
1918                     GNUNET_ERROR_TYPE_WARNING,
1919                     _
1920                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1921                     p_string, "PERCENTAGE", "TESTING");
1922       GNUNET_free (p_string);
1923     }
1924
1925   cutoff = (unsigned int) (nat_percentage * pg->total);
1926   connect_attempts = 0;
1927   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1928     {
1929       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1930         {
1931           if ((outer_count > cutoff) || (inner_count > cutoff))
1932             {
1933 #if VERBOSE_TESTING
1934               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1935                   "Connecting peer %d to peer %d\n",
1936                   outer_count, inner_count);
1937 #endif
1938               connect_attempts += proc (pg, outer_count, inner_count, list,
1939                                         GNUNET_YES);
1940             }
1941         }
1942     }
1943   return connect_attempts;
1944 }
1945
1946 #if TOPOLOGY_HACK
1947 /**
1948  * Create a topology given a peer group (set of running peers)
1949  * and a connection processor.
1950  *
1951  * @param pg the peergroup to create the topology on
1952  * @param proc the connection processor to call to actually set
1953  *        up connections between two peers
1954  * @param list the peer list to use
1955  *
1956  * @return the number of connections that were set up
1957  *
1958  */
1959 static unsigned int
1960 create_nated_internet_copy(struct GNUNET_TESTING_PeerGroup *pg,
1961                            GNUNET_TESTING_ConnectionProcessor proc,
1962                            enum PeerLists list)
1963 {
1964   unsigned int outer_count, inner_count;
1965   unsigned int cutoff;
1966   int connect_attempts;
1967   double nat_percentage;
1968   char *p_string;
1969   unsigned int count;
1970   struct ProgressMeter *conn_meter;
1971
1972   nat_percentage = 0.6; /* FIXME: default percentage? */
1973   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1974                                                           "PERCENTAGE",
1975                                                           &p_string))
1976     {
1977       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1978         GNUNET_log (
1979                     GNUNET_ERROR_TYPE_WARNING,
1980                     _
1981                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1982                     p_string, "PERCENTAGE", "TESTING");
1983       GNUNET_free (p_string);
1984     }
1985
1986   cutoff = (unsigned int) (nat_percentage * pg->total);
1987   count = 0;
1988   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1989     {
1990       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1991         {
1992           if ((outer_count > cutoff) || (inner_count > cutoff))
1993             {
1994               count++;
1995             }
1996         }
1997     }
1998   conn_meter = create_meter (count, "NAT COPY", GNUNET_YES);
1999   connect_attempts = 0;
2000   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2001     {
2002       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2003         {
2004           if ((outer_count > cutoff) || (inner_count > cutoff))
2005             {
2006 #if VERBOSE_TESTING
2007               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2008                   "Connecting peer %d to peer %d\n",
2009                   outer_count, inner_count);
2010 #endif
2011               connect_attempts += proc (pg, outer_count, inner_count, list,
2012                                         GNUNET_YES);
2013               add_connections (pg, outer_count, inner_count, ALLOWED, GNUNET_NO);
2014               update_meter (conn_meter);
2015             }
2016         }
2017     }
2018   free_meter (conn_meter);
2019
2020   return connect_attempts;
2021 }
2022 #endif
2023
2024 /**
2025  * Create a topology given a peer group (set of running peers)
2026  * and a connection processor.
2027  *
2028  * @param pg the peergroup to create the topology on
2029  * @param proc the connection processor to call to actually set
2030  *        up connections between two peers
2031  * @param list the peer list to use
2032  *
2033  * @return the number of connections that were set up
2034  *
2035  */
2036 static unsigned int
2037 create_small_world(struct GNUNET_TESTING_PeerGroup *pg,
2038                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2039 {
2040   unsigned int i, j, k;
2041   unsigned int square;
2042   unsigned int rows;
2043   unsigned int cols;
2044   unsigned int toggle = 1;
2045   unsigned int nodeToConnect;
2046   unsigned int natLog;
2047   unsigned int node1Row;
2048   unsigned int node1Col;
2049   unsigned int node2Row;
2050   unsigned int node2Col;
2051   unsigned int distance;
2052   double probability, random, percentage;
2053   unsigned int smallWorldConnections;
2054   unsigned int small_world_it;
2055   char *p_string;
2056   int connect_attempts;
2057   square = floor (sqrt (pg->total));
2058   rows = square;
2059   cols = square;
2060
2061   percentage = 0.5; /* FIXME: default percentage? */
2062   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2063                                                           "PERCENTAGE",
2064                                                           &p_string))
2065     {
2066       if (sscanf (p_string, "%lf", &percentage) != 1)
2067         GNUNET_log (
2068                     GNUNET_ERROR_TYPE_WARNING,
2069                     _
2070                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2071                     p_string, "PERCENTAGE", "TESTING");
2072       GNUNET_free (p_string);
2073     }
2074   if (percentage < 0.0)
2075     {
2076       GNUNET_log (
2077                   GNUNET_ERROR_TYPE_WARNING,
2078                   _
2079                   ("Invalid value `%s' for option `%s' in section `%s': got %f, needed value greater than 0\n"),
2080                   "PERCENTAGE", "TESTING", percentage);
2081       percentage = 0.5;
2082     }
2083   probability = 0.5; /* FIXME: default percentage? */
2084   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2085                                                           "PROBABILITY",
2086                                                           &p_string))
2087     {
2088       if (sscanf (p_string, "%lf", &probability) != 1)
2089         GNUNET_log (
2090                     GNUNET_ERROR_TYPE_WARNING,
2091                     _
2092                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2093                     p_string, "PROBABILITY", "TESTING");
2094       GNUNET_free (p_string);
2095     }
2096   if (square * square != pg->total)
2097     {
2098       while (rows * cols < pg->total)
2099         {
2100           if (toggle % 2 == 0)
2101             rows++;
2102           else
2103             cols++;
2104
2105           toggle++;
2106         }
2107     }
2108 #if VERBOSE_TESTING
2109   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2110       _
2111       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2112       rows, cols);
2113 #endif
2114
2115   connect_attempts = 0;
2116   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2117    * to the node to its right and above.  Once this is over, we'll have our torus!
2118    * Special case for the last node (if the rows and columns are not equal), connect
2119    * to the first in the row to maintain topology.
2120    */
2121   for (i = 0; i < pg->total; i++)
2122     {
2123       /* First connect to the node to the right */
2124       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2125         nodeToConnect = i + 1;
2126       else if (i + 1 == pg->total)
2127         nodeToConnect = rows * cols - cols;
2128       else
2129         nodeToConnect = i - cols + 1;
2130
2131       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2132
2133       if (i < cols)
2134         {
2135           nodeToConnect = (rows * cols) - cols + i;
2136           if (nodeToConnect >= pg->total)
2137             nodeToConnect -= cols;
2138         }
2139       else
2140         nodeToConnect = i - cols;
2141
2142       if (nodeToConnect < pg->total)
2143         connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2144     }
2145   natLog = log (pg->total);
2146 #if VERBOSE_TESTING > 2
2147   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2148       _("natural log of %d is %d, will run %d iterations\n"),
2149       pg->total, natLog, (int) (natLog * percentage));
2150   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2151       _("Total connections added thus far: %u!\n"), connect_attempts);
2152 #endif
2153   smallWorldConnections = 0;
2154   small_world_it = (unsigned int) (natLog * percentage);
2155   if (small_world_it < 1)
2156     small_world_it = 1;
2157   GNUNET_assert (small_world_it > 0 && small_world_it < (unsigned int) -1);
2158   for (i = 0; i < small_world_it; i++)
2159     {
2160       for (j = 0; j < pg->total; j++)
2161         {
2162           /* Determine the row and column of node at position j on the 2d torus */
2163           node1Row = j / cols;
2164           node1Col = j - (node1Row * cols);
2165           for (k = 0; k < pg->total; k++)
2166             {
2167               /* Determine the row and column of node at position k on the 2d torus */
2168               node2Row = k / cols;
2169               node2Col = k - (node2Row * cols);
2170               /* Simple Cartesian distance */
2171               distance = abs (node1Row - node2Row) + abs (node1Col - node2Col);
2172               if (distance > 1)
2173                 {
2174                   /* Calculate probability as 1 over the square of the distance */
2175                   probability = 1.0 / (distance * distance);
2176                   /* Choose a random value between 0 and 1 */
2177                   random
2178                       = ((double) GNUNET_CRYPTO_random_u64 (
2179                                                             GNUNET_CRYPTO_QUALITY_WEAK,
2180                                                             UINT64_MAX))
2181                           / ((double) UINT64_MAX);
2182                   /* If random < probability, then connect the two nodes */
2183                   if (random < probability)
2184                     smallWorldConnections += proc (pg, j, k, list, GNUNET_YES);
2185
2186                 }
2187             }
2188         }
2189     }
2190   connect_attempts += smallWorldConnections;
2191 #if VERBOSE_TESTING > 2
2192   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2193       _("Total connections added for small world: %d!\n"),
2194       smallWorldConnections);
2195 #endif
2196   return connect_attempts;
2197 }
2198
2199 /**
2200  * Create a topology given a peer group (set of running peers)
2201  * and a connection processor.
2202  *
2203  * @param pg the peergroup to create the topology on
2204  * @param proc the connection processor to call to actually set
2205  *        up connections between two peers
2206  * @param list the peer list to use
2207  *
2208  * @return the number of connections that were set up
2209  *
2210  */
2211 static unsigned int
2212 create_erdos_renyi(struct GNUNET_TESTING_PeerGroup *pg,
2213                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2214 {
2215   double temp_rand;
2216   unsigned int outer_count;
2217   unsigned int inner_count;
2218   int connect_attempts;
2219   double probability;
2220   char *p_string;
2221
2222   probability = 0.5; /* FIXME: default percentage? */
2223   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2224                                                           "PROBABILITY",
2225                                                           &p_string))
2226     {
2227       if (sscanf (p_string, "%lf", &probability) != 1)
2228         GNUNET_log (
2229                     GNUNET_ERROR_TYPE_WARNING,
2230                     _
2231                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2232                     p_string, "PROBABILITY", "TESTING");
2233       GNUNET_free (p_string);
2234     }
2235   connect_attempts = 0;
2236   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2237     {
2238       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2239         {
2240           temp_rand
2241               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
2242                                                     UINT64_MAX))
2243                   / ((double) UINT64_MAX);
2244 #if VERBOSE_TESTING
2245           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2246               _("rand is %f probability is %f\n"), temp_rand,
2247               probability);
2248 #endif
2249           if (temp_rand < probability)
2250             {
2251               connect_attempts += proc (pg, outer_count, inner_count, list,
2252                                         GNUNET_YES);
2253             }
2254         }
2255     }
2256
2257   return connect_attempts;
2258 }
2259
2260 /**
2261  * Create a topology given a peer group (set of running peers)
2262  * and a connection processor.  This particular function creates
2263  * the connections for a 2d-torus, plus additional "closest"
2264  * connections per peer.
2265  *
2266  * @param pg the peergroup to create the topology on
2267  * @param proc the connection processor to call to actually set
2268  *        up connections between two peers
2269  * @param list the peer list to use
2270  *
2271  * @return the number of connections that were set up
2272  *
2273  */
2274 static unsigned int
2275 create_2d_torus(struct GNUNET_TESTING_PeerGroup *pg,
2276                 GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2277 {
2278   unsigned int i;
2279   unsigned int square;
2280   unsigned int rows;
2281   unsigned int cols;
2282   unsigned int toggle = 1;
2283   unsigned int nodeToConnect;
2284   int connect_attempts;
2285
2286   connect_attempts = 0;
2287
2288   square = floor (sqrt (pg->total));
2289   rows = square;
2290   cols = square;
2291
2292   if (square * square != pg->total)
2293     {
2294       while (rows * cols < pg->total)
2295         {
2296           if (toggle % 2 == 0)
2297             rows++;
2298           else
2299             cols++;
2300
2301           toggle++;
2302         }
2303     }
2304 #if VERBOSE_TESTING
2305   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2306       _
2307       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2308       rows, cols);
2309 #endif
2310   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2311    * to the node to its right and above.  Once this is over, we'll have our torus!
2312    * Special case for the last node (if the rows and columns are not equal), connect
2313    * to the first in the row to maintain topology.
2314    */
2315   for (i = 0; i < pg->total; i++)
2316     {
2317       /* First connect to the node to the right */
2318       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2319         nodeToConnect = i + 1;
2320       else if (i + 1 == pg->total)
2321         nodeToConnect = rows * cols - cols;
2322       else
2323         nodeToConnect = i - cols + 1;
2324 #if VERBOSE_TESTING
2325       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2326           "Connecting peer %d to peer %d\n", i, nodeToConnect);
2327 #endif
2328       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2329
2330       /* Second connect to the node immediately above */
2331       if (i < cols)
2332         {
2333           nodeToConnect = (rows * cols) - cols + i;
2334           if (nodeToConnect >= pg->total)
2335             nodeToConnect -= cols;
2336         }
2337       else
2338         nodeToConnect = i - cols;
2339
2340       if (nodeToConnect < pg->total)
2341         {
2342 #if VERBOSE_TESTING
2343           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2344               "Connecting peer %d to peer %d\n", i, nodeToConnect);
2345 #endif
2346           connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2347         }
2348
2349     }
2350
2351   return connect_attempts;
2352 }
2353
2354 /**
2355  * Create a topology given a peer group (set of running peers)
2356  * and a connection processor.
2357  *
2358  * @param pg the peergroup to create the topology on
2359  * @param proc the connection processor to call to actually set
2360  *        up connections between two peers
2361  * @param list the peer list to use
2362  * @param check does the connection processor need to check before
2363  *              performing an action on the list?
2364  *
2365  * @return the number of connections that were set up
2366  *
2367  */
2368 static unsigned int
2369 create_clique(struct GNUNET_TESTING_PeerGroup *pg,
2370               GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list,
2371               unsigned int check)
2372 {
2373   unsigned int outer_count;
2374   unsigned int inner_count;
2375   int connect_attempts;
2376   struct ProgressMeter *conn_meter;
2377   connect_attempts = 0;
2378
2379   conn_meter = create_meter ((((pg->total * pg->total) + pg->total) / 2)
2380       - pg->total, "Create Clique ", GNUNET_NO);
2381   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2382     {
2383       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2384         {
2385 #if VERBOSE_TESTING
2386           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2387               "Connecting peer %d to peer %d\n",
2388               outer_count, inner_count);
2389 #endif
2390           connect_attempts += proc (pg, outer_count, inner_count, list, check);
2391           update_meter (conn_meter);
2392         }
2393     }
2394   reset_meter (conn_meter);
2395   free_meter (conn_meter);
2396   return connect_attempts;
2397 }
2398
2399 #if !OLD
2400 /**
2401  * Iterator over hash map entries.
2402  *
2403  * @param cls closure the peer group
2404  * @param key the key stored in the hashmap is the
2405  *            index of the peer to connect to
2406  * @param value value in the hash map, handle to the peer daemon
2407  * @return GNUNET_YES if we should continue to
2408  *         iterate,
2409  *         GNUNET_NO if not.
2410  */
2411 static int
2412 unblacklist_iterator (void *cls,
2413     const GNUNET_HashCode * key,
2414     void *value)
2415   {
2416     struct UnblacklistContext *un_ctx = cls;
2417     uint32_t second_pos;
2418
2419     uid_from_hash (key, &second_pos);
2420
2421     unblacklist_connections(un_ctx->pg, un_ctx->first_uid, second_pos);
2422
2423     return GNUNET_YES;
2424   }
2425 #endif
2426
2427 /**
2428  * Create a blacklist topology based on the allowed topology
2429  * which disallows any connections not in the allowed topology
2430  * at the transport level.
2431  *
2432  * @param pg the peergroup to create the topology on
2433  * @param proc the connection processor to call to allow
2434  *        up connections between two peers
2435  *
2436  * @return the number of connections that were set up
2437  *
2438  */
2439 static unsigned int
2440 copy_allowed(struct GNUNET_TESTING_PeerGroup *pg,
2441              GNUNET_TESTING_ConnectionProcessor proc)
2442 {
2443   unsigned int count;
2444   unsigned int total;
2445   struct PeerConnection *iter;
2446 #if !OLD
2447   struct UnblacklistContext un_ctx;
2448
2449   un_ctx.pg = pg;
2450 #endif
2451   total = 0;
2452   for (count = 0; count < pg->total - 1; count++)
2453     {
2454 #if OLD
2455       iter = pg->peers[count].allowed_peers_head;
2456       while (iter != NULL)
2457         {
2458           remove_connections (pg, count, iter->index, BLACKLIST, GNUNET_YES);
2459           //unblacklist_connections(pg, count, iter->index);
2460           iter = iter->next;
2461         }
2462 #else
2463       un_ctx.first_uid = count;
2464       total += GNUNET_CONTAINER_multihashmap_iterate(pg->peers[count].allowed_peers,
2465                                                      &unblacklist_iterator,
2466                                                      &un_ctx);
2467 #endif
2468     }
2469   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470               "Unblacklisted %u peers\n",
2471               total);
2472   return total;
2473 }
2474
2475 /**
2476  * Create a topology given a peer group (set of running peers)
2477  * and a connection processor.
2478  *
2479  * @param pg the peergroup to create the topology on
2480  * @param proc the connection processor to call to actually set
2481  *        up connections between two peers
2482  * @param list which list should be modified
2483  *
2484  * @return the number of connections that were set up
2485  *
2486  */
2487 static unsigned int
2488 create_line(struct GNUNET_TESTING_PeerGroup *pg,
2489             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2490 {
2491   unsigned int count;
2492   unsigned int connect_attempts;
2493
2494   connect_attempts = 0;
2495   /* Connect each peer to the next highest numbered peer */
2496   for (count = 0; count < pg->total - 1; count++)
2497     {
2498 #if VERBOSE_TESTING
2499       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2500                   "Connecting peer %d to peer %d\n",
2501                   count, count + 1);
2502 #endif
2503       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2504     }
2505
2506   return connect_attempts;
2507 }
2508
2509 /**
2510  * Create a topology given a peer group (set of running peers)
2511  * and a connection processor.
2512  *
2513  * @param pg the peergroup to create the topology on
2514  * @param filename the file to read topology information from
2515  * @param proc the connection processor to call to actually set
2516  *        up connections between two peers
2517  * @param list the peer list to use
2518  *
2519  * @return the number of connections that were set up
2520  *
2521  */
2522 static unsigned int
2523 create_from_file(struct GNUNET_TESTING_PeerGroup *pg, char *filename,
2524                  GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2525 {
2526   int connect_attempts;
2527   unsigned int first_peer_index;
2528   unsigned int second_peer_index;
2529   struct stat frstat;
2530   int count;
2531   char *data;
2532   const char *buf;
2533   unsigned int total_peers;
2534   enum States curr_state;
2535
2536   connect_attempts = 0;
2537   if (GNUNET_OK != GNUNET_DISK_file_test (filename))
2538     GNUNET_DISK_fn_write (filename, NULL, 0, GNUNET_DISK_PERM_USER_READ);
2539
2540   if ((0 != STAT (filename, &frstat)) || (frstat.st_size == 0))
2541     {
2542       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2543                   "Could not open file `%s' specified for topology!", filename);
2544       return connect_attempts;
2545     }
2546
2547   data = GNUNET_malloc_large (frstat.st_size);
2548   GNUNET_assert(data != NULL);
2549   if (frstat.st_size != GNUNET_DISK_fn_read (filename, data, frstat.st_size))
2550     {
2551       GNUNET_log (
2552                   GNUNET_ERROR_TYPE_ERROR,
2553                   "Could not read file %s specified for host list, ending test!",
2554                   filename);
2555       GNUNET_free (data);
2556       return connect_attempts;
2557     }
2558
2559   buf = data;
2560   count = 0;
2561   first_peer_index = 0;
2562   /* First line should contain a single integer, specifying the number of peers */
2563   /* Each subsequent line should contain this format PEER_INDEX:OTHER_PEER_INDEX[,...] */
2564   curr_state = NUM_PEERS;
2565   while (count < frstat.st_size - 1)
2566     {
2567       if ((buf[count] == '\n') || (buf[count] == ' '))
2568         {
2569           count++;
2570           continue;
2571         }
2572
2573       switch (curr_state)
2574         {
2575         case NUM_PEERS:
2576           errno = 0;
2577           total_peers = strtoul(&buf[count], NULL, 10);
2578           if (errno != 0)
2579             {
2580               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2581                           "Failed to read number of peers from topology file!\n");
2582               GNUNET_free (data);
2583               return connect_attempts;
2584             }
2585           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2586                       "Read %u total peers in topology\n", total_peers);
2587           GNUNET_assert(total_peers == pg->total);
2588           curr_state = PEER_INDEX;
2589           while ((buf[count] != '\n') && (count < frstat.st_size - 1))
2590             count++;
2591           count++;
2592           break;
2593         case PEER_INDEX:
2594           errno = 0;
2595           first_peer_index = strtoul(&buf[count], NULL, 10);
2596           if (errno != 0)
2597             {
2598               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2599                           "Failed to read peer index from topology file!\n");
2600               GNUNET_free (data);
2601               return connect_attempts;
2602             }
2603           while ((buf[count] != ':') && (count < frstat.st_size - 1))
2604             count++;
2605           count++;
2606           curr_state = OTHER_PEER_INDEX;
2607           break;
2608         case COLON:
2609           if (1 == sscanf (&buf[count], ":"))
2610             curr_state = OTHER_PEER_INDEX;
2611           count++;
2612           break;
2613         case OTHER_PEER_INDEX:
2614           errno = 0;
2615           second_peer_index = strtoul(&buf[count], NULL, 10);
2616           if (errno != 0)
2617             {
2618               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2619                           "Failed to peer index from topology file!\n");
2620               GNUNET_free (data);
2621               return connect_attempts;
2622             }
2623           /* Assume file is written with first peer 1, but array index is 0 */
2624           connect_attempts += proc (pg, first_peer_index - 1, second_peer_index
2625                                     - 1, list, GNUNET_YES);
2626           while ((buf[count] != '\n') && (buf[count] != ',') && (count
2627                                                                  < frstat.st_size - 1))
2628             count++;
2629           if (buf[count] == '\n')
2630             {
2631               curr_state = PEER_INDEX;
2632             }
2633           else if (buf[count] != ',')
2634             {
2635               curr_state = OTHER_PEER_INDEX;
2636             }
2637           count++;
2638           break;
2639         default:
2640           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2641                       "Found bad data in topology file while in state %d!\n",
2642                       curr_state);
2643           GNUNET_break(0);
2644           GNUNET_free (data);
2645           return connect_attempts;
2646         }
2647     }
2648   GNUNET_free (data);
2649   return connect_attempts;
2650 }
2651
2652 /**
2653  * Create a topology given a peer group (set of running peers)
2654  * and a connection processor.
2655  *
2656  * @param pg the peergroup to create the topology on
2657  * @param proc the connection processor to call to actually set
2658  *        up connections between two peers
2659  * @param list the peer list to use
2660  *
2661  * @return the number of connections that were set up
2662  *
2663  */
2664 static unsigned int
2665 create_ring(struct GNUNET_TESTING_PeerGroup *pg,
2666             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2667 {
2668   unsigned int count;
2669   int connect_attempts;
2670
2671   connect_attempts = 0;
2672
2673   /* Connect each peer to the next highest numbered peer */
2674   for (count = 0; count < pg->total - 1; count++)
2675     {
2676 #if VERBOSE_TESTING
2677       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2678           "Connecting peer %d to peer %d\n", count, count + 1);
2679 #endif
2680       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2681     }
2682
2683   /* Connect the last peer to the first peer */
2684   connect_attempts += proc (pg, pg->total - 1, 0, list, GNUNET_YES);
2685
2686   return connect_attempts;
2687 }
2688
2689 #if !OLD
2690 /**
2691  * Iterator for writing friends of a peer to a file.
2692  *
2693  * @param cls closure, an open writable file handle
2694  * @param key the key the daemon was stored under
2695  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2696  *
2697  * @return GNUNET_YES to continue iteration
2698  *
2699  * TODO: Could replace friend_file_iterator and blacklist_file_iterator
2700  *       with a single file_iterator that takes a closure which contains
2701  *       the prefix to write before the peer.  Then this could be used
2702  *       for blacklisting multiple transports and writing the friend
2703  *       file.  I'm sure *someone* will complain loudly about other
2704  *       things that negate these functions even existing so no point in
2705  *       "fixing" now.
2706  */
2707 static int
2708 friend_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2709   {
2710     FILE *temp_friend_handle = cls;
2711     struct GNUNET_TESTING_Daemon *peer = value;
2712     struct GNUNET_PeerIdentity *temppeer;
2713     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2714
2715     temppeer = &peer->id;
2716     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2717     fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2718
2719     return GNUNET_YES;
2720   }
2721
2722 struct BlacklistContext
2723   {
2724     /*
2725      * The (open) file handle to write to
2726      */
2727     FILE *temp_file_handle;
2728
2729     /*
2730      * The transport that this peer will be blacklisted on.
2731      */
2732     char *transport;
2733   };
2734
2735 /**
2736  * Iterator for writing blacklist data to appropriate files.
2737  *
2738  * @param cls closure, an open writable file handle
2739  * @param key the key the daemon was stored under
2740  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2741  *
2742  * @return GNUNET_YES to continue iteration
2743  */
2744 static int
2745 blacklist_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2746   {
2747     struct BlacklistContext *blacklist_ctx = cls;
2748     struct GNUNET_TESTING_Daemon *peer = value;
2749     struct GNUNET_PeerIdentity *temppeer;
2750     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2751
2752     temppeer = &peer->id;
2753     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2754     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Writing entry %s:%s to file\n", blacklist_ctx->transport, (char *) &peer_enc);
2755     fprintf (blacklist_ctx->temp_file_handle, "%s:%s\n",
2756         blacklist_ctx->transport, (char *) &peer_enc);
2757
2758     return GNUNET_YES;
2759   }
2760 #endif
2761
2762 /*
2763  * Create the friend files based on the PeerConnection's
2764  * of each peer in the peer group, and copy the files
2765  * to the appropriate place
2766  *
2767  * @param pg the peer group we are dealing with
2768  */
2769 static int
2770 create_and_copy_friend_files(struct GNUNET_TESTING_PeerGroup *pg)
2771 {
2772   FILE *temp_friend_handle;
2773   unsigned int pg_iter;
2774   char *temp_service_path;
2775   struct GNUNET_OS_Process **procarr;
2776   char *arg;
2777   char *mytemp;
2778 #if NOT_STUPID
2779   enum GNUNET_OS_ProcessStatusType type;
2780   unsigned long return_code;
2781   int count;
2782   int max_wait = 10;
2783 #endif
2784   int ret;
2785
2786   ret = GNUNET_OK;
2787 #if OLD
2788   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2789   struct PeerConnection *conn_iter;
2790 #endif
2791   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2792   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2793     {
2794       mytemp = GNUNET_DISK_mktemp ("friends");
2795       GNUNET_assert (mytemp != NULL);
2796       temp_friend_handle = fopen (mytemp, "wt");
2797       GNUNET_assert (temp_friend_handle != NULL);
2798 #if OLD
2799       conn_iter = pg->peers[pg_iter].allowed_peers_head;
2800       while (conn_iter != NULL)
2801         {
2802           GNUNET_CRYPTO_hash_to_enc (
2803                                      &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2804                                      &peer_enc);
2805           fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2806           conn_iter = conn_iter->next;
2807         }
2808 #else
2809       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].allowed_peers,
2810           &friend_file_iterator,
2811           temp_friend_handle);
2812 #endif
2813       fclose (temp_friend_handle);
2814
2815       if (GNUNET_OK
2816           != GNUNET_CONFIGURATION_get_value_string (pg->peers[pg_iter].
2817                                                     daemon->cfg,
2818                                                     "PATHS", "SERVICEHOME",
2819                                                     &temp_service_path))
2820         {
2821           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2822                       _("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
2823                       "SERVICEHOME", "PATHS");
2824           if (UNLINK (mytemp) != 0)
2825             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
2826                                       "unlink",
2827                                       mytemp);
2828           GNUNET_free (mytemp);
2829           break;
2830         }
2831
2832       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
2833         {
2834           GNUNET_asprintf (&arg, "%s/friends", temp_service_path);
2835           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
2836                                                       mytemp, arg, NULL);
2837           GNUNET_assert(procarr[pg_iter] != NULL);
2838 #if VERBOSE_TESTING
2839           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2840                       "Copying file with command cp %s %s\n",
2841                       mytemp,
2842                       arg);
2843 #endif
2844           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2845           GNUNET_OS_process_close (procarr[pg_iter]);
2846           GNUNET_free (arg);
2847         }
2848       else /* Remote, scp the file to the correct place */
2849         {
2850           if (NULL != pg->peers[pg_iter].daemon->username)
2851             GNUNET_asprintf (&arg, "%s@%s:%s/friends",
2852                              pg->peers[pg_iter].daemon->username,
2853                              pg->peers[pg_iter].daemon->hostname,
2854                              temp_service_path);
2855           else
2856             GNUNET_asprintf (&arg, "%s:%s/friends",
2857                              pg->peers[pg_iter].daemon->hostname,
2858                              temp_service_path);
2859           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
2860                                                       mytemp, arg, NULL);
2861           GNUNET_assert(procarr[pg_iter] != NULL);
2862           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2863           GNUNET_OS_process_close (procarr[pg_iter]);
2864           if (ret != GNUNET_OK)
2865             {
2866               /* FIXME: free contents of 'procarr' array */
2867               GNUNET_free (procarr);
2868               GNUNET_free (temp_service_path);
2869               GNUNET_free (mytemp);
2870               GNUNET_free (arg);
2871               return ret;
2872             }
2873           procarr[pg_iter] = NULL;
2874 #if VERBOSE_TESTING
2875           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2876                       "Copying file with command scp %s %s\n",
2877                       mytemp,
2878                       arg);
2879 #endif
2880           GNUNET_free (arg);
2881         }
2882       GNUNET_free (temp_service_path);
2883       GNUNET_free (mytemp);
2884     }
2885
2886 #if NOT_STUPID
2887   count = 0;
2888   ret = GNUNET_SYSERR;
2889   while ((count < max_wait) && (ret != GNUNET_OK))
2890     {
2891       ret = GNUNET_OK;
2892       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2893         {
2894 #if VERBOSE_TESTING
2895           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2896                       "Checking copy status of file %d\n",
2897                       pg_iter);
2898 #endif
2899           if (procarr[pg_iter] != NULL) /* Check for already completed! */
2900             {
2901               if (GNUNET_OS_process_status
2902                   (procarr[pg_iter], &type, &return_code) != GNUNET_OK)
2903                 {
2904                   ret = GNUNET_SYSERR;
2905                 }
2906               else if ((type != GNUNET_OS_PROCESS_EXITED)
2907                   || (return_code != 0))
2908                 {
2909                   ret = GNUNET_SYSERR;
2910                 }
2911               else
2912                 {
2913                   GNUNET_OS_process_close (procarr[pg_iter]);
2914                   procarr[pg_iter] = NULL;
2915 #if VERBOSE_TESTING
2916                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2917                               "File %d copied\n",
2918                               pg_iter);
2919 #endif
2920                 }
2921             }
2922         }
2923       count++;
2924       if (ret == GNUNET_SYSERR)
2925         {
2926           /* FIXME: why sleep here? -CG */
2927           sleep (1);
2928         }
2929     }
2930
2931 #if VERBOSE_TESTING
2932   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2933       _("Finished copying all friend files!\n"));
2934 #endif
2935 #endif
2936   GNUNET_free (procarr);
2937   return ret;
2938 }
2939
2940 /*
2941  * Create the blacklist files based on the PeerConnection's
2942  * of each peer in the peer group, and copy the files
2943  * to the appropriate place.
2944  *
2945  * @param pg the peer group we are dealing with
2946  * @param transports space delimited list of transports to blacklist
2947  */
2948 static int
2949 create_and_copy_blacklist_files(struct GNUNET_TESTING_PeerGroup *pg,
2950                                 const char *transports)
2951 {
2952   FILE *temp_file_handle;
2953   unsigned int pg_iter;
2954   char *temp_service_path;
2955   struct GNUNET_OS_Process **procarr;
2956   char *arg;
2957   char *mytemp;
2958   enum GNUNET_OS_ProcessStatusType type;
2959   unsigned long return_code;
2960   int count;
2961   int ret;
2962   int max_wait = 10;
2963   int transport_len;
2964   unsigned int i;
2965   char *pos;
2966   char *temp_transports;
2967 #if OLD
2968   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2969   struct PeerConnection *conn_iter;
2970 #else
2971   static struct BlacklistContext blacklist_ctx;
2972 #endif
2973
2974   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2975   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2976     {
2977       mytemp = GNUNET_DISK_mktemp ("blacklist");
2978       GNUNET_assert (mytemp != NULL);
2979       temp_file_handle = fopen (mytemp, "wt");
2980       GNUNET_assert (temp_file_handle != NULL);
2981       temp_transports = GNUNET_strdup (transports);
2982 #if !OLD
2983       blacklist_ctx.temp_file_handle = temp_file_handle;
2984 #endif
2985       transport_len = strlen (temp_transports) + 1;
2986       pos = NULL;
2987
2988       for (i = 0; i < transport_len; i++)
2989         {
2990           if ((temp_transports[i] == ' ') && (pos == NULL))
2991             continue; /* At start of string (whitespace) */
2992           else if ((temp_transports[i] == ' ') || (temp_transports[i] == '\0')) /* At end of string */
2993             {
2994               temp_transports[i] = '\0';
2995 #if OLD
2996               conn_iter = pg->peers[pg_iter].blacklisted_peers_head;
2997               while (conn_iter != NULL)
2998                 {
2999                   GNUNET_CRYPTO_hash_to_enc (
3000                                              &pg->peers[conn_iter->index].daemon->id.hashPubKey,
3001                                              &peer_enc);
3002                   fprintf (temp_file_handle, "%s:%s\n", pos, (char *) &peer_enc);
3003                   conn_iter = conn_iter->next;
3004                 }
3005 #else
3006               blacklist_ctx.transport = pos;
3007               (void) GNUNET_CONTAINER_multihashmap_iterate (pg->
3008                                                             peers
3009                                                             [pg_iter].blacklisted_peers,
3010                                                             &blacklist_file_iterator,
3011                                                             &blacklist_ctx);
3012 #endif
3013               pos = NULL;
3014             } /* At beginning of actual string */
3015           else if (pos == NULL)
3016             {
3017               pos = &temp_transports[i];
3018             }
3019         }
3020
3021       GNUNET_free (temp_transports);
3022       fclose (temp_file_handle);
3023
3024       if (GNUNET_OK
3025           != GNUNET_CONFIGURATION_get_value_string (
3026                                                     pg->peers[pg_iter]. daemon->cfg,
3027                                                     "PATHS", "SERVICEHOME",
3028                                                     &temp_service_path))
3029         {
3030           GNUNET_log (
3031                       GNUNET_ERROR_TYPE_WARNING,
3032                       _
3033                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
3034                       "SERVICEHOME", "PATHS");
3035           if (UNLINK (mytemp) != 0)
3036             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
3037                 mytemp);
3038           GNUNET_free (mytemp);
3039           break;
3040         }
3041
3042       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
3043         {
3044           GNUNET_asprintf (&arg, "%s/blacklist", temp_service_path);
3045           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
3046                                                       mytemp, arg, NULL);
3047 #if VERBOSE_TESTING
3048           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3049               _("Copying file with command cp %s %s\n"), mytemp, arg);
3050 #endif
3051
3052           GNUNET_free (arg);
3053         }
3054       else /* Remote, scp the file to the correct place */
3055         {
3056           if (NULL != pg->peers[pg_iter].daemon->username)
3057             GNUNET_asprintf (&arg, "%s@%s:%s/blacklist",
3058                              pg->peers[pg_iter].daemon->username,
3059                              pg->peers[pg_iter].daemon->hostname,
3060                              temp_service_path);
3061           else
3062             GNUNET_asprintf (&arg, "%s:%s/blacklist",
3063                              pg->peers[pg_iter].daemon->hostname,
3064                              temp_service_path);
3065           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
3066                                                       mytemp, arg, NULL);
3067           GNUNET_assert(procarr[pg_iter] != NULL);
3068           GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: add scheduled blacklist file copy that parallelizes file copying! */
3069
3070 #if VERBOSE_TESTING
3071           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3072               _("Copying file with command scp %s %s\n"), mytemp,
3073               arg);
3074 #endif
3075           GNUNET_free (arg);
3076         }
3077       GNUNET_free (temp_service_path);
3078       GNUNET_free (mytemp);
3079     }
3080
3081   count = 0;
3082   ret = GNUNET_SYSERR;
3083   while ((count < max_wait) && (ret != GNUNET_OK))
3084     {
3085       ret = GNUNET_OK;
3086       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3087         {
3088 #if VERBOSE_TESTING
3089           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3090               _("Checking copy status of file %d\n"), pg_iter);
3091 #endif
3092           if (procarr[pg_iter] != NULL) /* Check for already completed! */
3093             {
3094               if (GNUNET_OS_process_status (procarr[pg_iter], &type,
3095                                             &return_code) != GNUNET_OK)
3096                 {
3097                   ret = GNUNET_SYSERR;
3098                 }
3099               else if ((type != GNUNET_OS_PROCESS_EXITED) || (return_code != 0))
3100                 {
3101                   ret = GNUNET_SYSERR;
3102                 }
3103               else
3104                 {
3105                   GNUNET_OS_process_close (procarr[pg_iter]);
3106                   procarr[pg_iter] = NULL;
3107 #if VERBOSE_TESTING
3108                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3109                       _("File %d copied\n"), pg_iter);
3110 #endif
3111                 }
3112             }
3113         }
3114       count++;
3115       if (ret == GNUNET_SYSERR)
3116         {
3117           /* FIXME: why sleep here? -CG */
3118           sleep (1);
3119         }
3120     }
3121
3122 #if VERBOSE_TESTING
3123   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3124       _("Finished copying all blacklist files!\n"));
3125 #endif
3126   GNUNET_free (procarr);
3127   return ret;
3128 }
3129
3130 /* Forward Declaration */
3131 static void
3132 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3133
3134 /**
3135  * Choose a random peer's next connection to create, and
3136  * call schedule_connect to set up the connect task.
3137  *
3138  * @param ct_ctx the overall connection context
3139  */
3140 static void
3141 preschedule_connect(struct GNUNET_TESTING_PeerGroup *pg)
3142 {
3143   struct ConnectTopologyContext *ct_ctx = &pg->ct_ctx;
3144   struct PeerConnection *connection_iter;
3145   struct ConnectContext *connect_context;
3146   uint32_t random_peer;
3147
3148   if (ct_ctx->remaining_connections == 0)
3149     return;
3150   random_peer
3151       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, pg->total);
3152   while (pg->peers[random_peer].connect_peers_head == NULL)
3153     random_peer = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3154                                             pg->total);
3155
3156   connection_iter = pg->peers[random_peer].connect_peers_head;
3157   connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3158   connect_context->first_index = random_peer;
3159   connect_context->second_index = connection_iter->index;
3160   connect_context->ct_ctx = ct_ctx;
3161   GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3162   GNUNET_CONTAINER_DLL_remove(pg->peers[random_peer].connect_peers_head, pg->peers[random_peer].connect_peers_tail, connection_iter);
3163   GNUNET_free(connection_iter);
3164   ct_ctx->remaining_connections--;
3165 }
3166
3167 #if USE_SEND_HELLOS
3168 /* Forward declaration */
3169 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3170
3171 /**
3172  * Close connections and free the hello context.
3173  *
3174  * @param cls the 'struct SendHelloContext *'
3175  * @param tc scheduler context
3176  */
3177 static void
3178 free_hello_context (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3179   {
3180     struct SendHelloContext *send_hello_context = cls;
3181     if (send_hello_context->peer->daemon->server != NULL)
3182       {
3183         GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3184         send_hello_context->peer->daemon->server = NULL;
3185       }
3186     if (send_hello_context->peer->daemon->th != NULL)
3187       {
3188         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3189         send_hello_context->peer->daemon->th = NULL;
3190       }
3191     if (send_hello_context->core_connect_task != GNUNET_SCHEDULER_NO_TASK)
3192       {
3193         GNUNET_SCHEDULER_cancel(send_hello_context->core_connect_task);
3194         send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3195       }
3196     send_hello_context->pg->outstanding_connects--;
3197     GNUNET_free(send_hello_context);
3198   }
3199
3200 /**
3201  * For peers that haven't yet connected, notify
3202  * the caller that they have failed (timeout).
3203  *
3204  * @param cls the 'struct SendHelloContext *'
3205  * @param tc scheduler context
3206  */
3207 static void
3208 notify_remaining_connections_failed (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3209   {
3210     struct SendHelloContext *send_hello_context = cls;
3211     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3212     struct PeerConnection *connection;
3213
3214     GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3215     send_hello_context->peer->daemon->server = NULL;
3216
3217     connection = send_hello_context->peer->connect_peers_head;
3218
3219     while (connection != NULL)
3220       {
3221         if (pg->notify_connection != NULL)
3222           {
3223             pg->notify_connection(pg->notify_connection_cls,
3224                 &send_hello_context->peer->daemon->id,
3225                 &pg->peers[connection->index].daemon->id,
3226                 0, /* FIXME */
3227                 send_hello_context->peer->daemon->cfg,
3228                 pg->peers[connection->index].daemon->cfg,
3229                 send_hello_context->peer->daemon,
3230                 pg->peers[connection->index].daemon,
3231                 "Peers failed to connect (timeout)");
3232           }
3233         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3234         GNUNET_free(connection);
3235         connection = connection->next;
3236       }
3237     GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3238 #if BAD
3239     other_peer = &pg->peers[connection->index];
3240 #endif
3241   }
3242
3243 /**
3244  * For peers that haven't yet connected, send
3245  * CORE connect requests.
3246  *
3247  * @param cls the 'struct SendHelloContext *'
3248  * @param tc scheduler context
3249  */
3250 static void
3251 send_core_connect_requests (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3252   {
3253     struct SendHelloContext *send_hello_context = cls;
3254     struct PeerConnection *conn;
3255     GNUNET_assert(send_hello_context->peer->daemon->server != NULL);
3256
3257     send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3258
3259     send_hello_context->connect_attempts++;
3260     if (send_hello_context->connect_attempts < send_hello_context->pg->ct_ctx.connect_attempts)
3261       {
3262         conn = send_hello_context->peer->connect_peers_head;
3263         while (conn != NULL)
3264           {
3265             GNUNET_CORE_peer_request_connect(send_hello_context->peer->daemon->server,
3266                 &send_hello_context->pg->peers[conn->index].daemon->id,
3267                 NULL,
3268                 NULL);
3269             conn = conn->next;
3270           }
3271         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) ,
3272             &send_core_connect_requests,
3273             send_hello_context);
3274       }
3275     else
3276       {
3277         GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Timeout before all connections created, marking rest as failed!\n");
3278         GNUNET_SCHEDULER_add_now(&notify_remaining_connections_failed, send_hello_context);
3279       }
3280
3281   }
3282
3283 /**
3284  * Success, connection is up.  Signal client our success.
3285  *
3286  * @param cls our "struct SendHelloContext"
3287  * @param peer identity of the peer that has connected
3288  * @param atsi performance information
3289  *
3290  * FIXME: remove peers from BOTH lists, call notify twice, should
3291  * double the speed of connections as long as the list iteration
3292  * doesn't take too long!
3293  */
3294 static void
3295 core_connect_notify (void *cls,
3296     const struct GNUNET_PeerIdentity *peer,
3297     const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3298   {
3299     struct SendHelloContext *send_hello_context = cls;
3300     struct PeerConnection *connection;
3301     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3302 #if BAD
3303     struct PeerData *other_peer;
3304 #endif
3305 #if DEBUG_TESTING
3306     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3307         "Connected peer %s to peer %s\n",
3308         ctx->d1->shortname, GNUNET_i2s(peer));
3309 #endif
3310
3311     if (0 == memcmp(&send_hello_context->peer->daemon->id, peer, sizeof(struct GNUNET_PeerIdentity)))
3312     return;
3313
3314     connection = send_hello_context->peer->connect_peers_head;
3315 #if BAD
3316     other_peer = NULL;
3317 #endif
3318
3319     while ((connection != NULL) &&
3320         (0 != memcmp(&pg->peers[connection->index].daemon->id, peer, sizeof(struct GNUNET_PeerIdentity))))
3321       {
3322         connection = connection->next;
3323       }
3324
3325     if (connection == NULL)
3326       {
3327         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);
3328       }
3329     else
3330       {
3331 #if BAD
3332         other_peer = &pg->peers[connection->index];
3333 #endif
3334         if (pg->notify_connection != NULL)
3335           {
3336             pg->notify_connection(pg->notify_connection_cls,
3337                 &send_hello_context->peer->daemon->id,
3338                 peer,
3339                 0, /* FIXME */
3340                 send_hello_context->peer->daemon->cfg,
3341                 pg->peers[connection->index].daemon->cfg,
3342                 send_hello_context->peer->daemon,
3343                 pg->peers[connection->index].daemon,
3344                 NULL);
3345           }
3346         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3347         GNUNET_free(connection);
3348       }
3349
3350 #if BAD
3351     /* Notify of reverse connection and remove from other peers list of outstanding */
3352     if (other_peer != NULL)
3353       {
3354         connection = other_peer->connect_peers_head;
3355         while ((connection != NULL) &&
3356             (0 != memcmp(&send_hello_context->peer->daemon->id, &pg->peers[connection->index].daemon->id, sizeof(struct GNUNET_PeerIdentity))))
3357           {
3358             connection = connection->next;
3359           }
3360         if (connection != NULL)
3361           {
3362             if (pg->notify_connection != NULL)
3363               {
3364                 pg->notify_connection(pg->notify_connection_cls,
3365                     peer,
3366                     &send_hello_context->peer->daemon->id,
3367                     0, /* FIXME */
3368                     pg->peers[connection->index].daemon->cfg,
3369                     send_hello_context->peer->daemon->cfg,
3370                     pg->peers[connection->index].daemon,
3371                     send_hello_context->peer->daemon,
3372                     NULL);
3373               }
3374
3375             GNUNET_CONTAINER_DLL_remove(other_peer->connect_peers_head, other_peer->connect_peers_tail, connection);
3376             GNUNET_free(connection);
3377           }
3378       }
3379 #endif
3380
3381     if (send_hello_context->peer->connect_peers_head == NULL)
3382       {
3383         GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3384       }
3385   }
3386
3387 /**
3388  * Notify of a successful connection to the core service.
3389  *
3390  * @param cls a struct SendHelloContext *
3391  * @param server handle to the core service
3392  * @param my_identity the peer identity of this peer
3393  * @param publicKey the public key of the peer
3394  */
3395 void
3396 core_init (void *cls,
3397     struct GNUNET_CORE_Handle * server,
3398     const struct GNUNET_PeerIdentity *
3399     my_identity,
3400     const struct
3401     GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
3402     publicKey)
3403   {
3404     struct SendHelloContext *send_hello_context = cls;
3405     send_hello_context->core_ready = GNUNET_YES;
3406   }
3407
3408 /**
3409  * Function called once a hello has been sent
3410  * to the transport, move on to the next one
3411  * or go away forever.
3412  *
3413  * @param cls the 'struct SendHelloContext *'
3414  * @param tc scheduler context
3415  */
3416 static void
3417 hello_sent_callback (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3418   {
3419     struct SendHelloContext *send_hello_context = cls;
3420     //unsigned int pg_iter;
3421     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3422       {
3423         GNUNET_free(send_hello_context);
3424         return;
3425       }
3426
3427     send_hello_context->pg->remaining_hellos--;
3428 #if DEBUG_TESTING
3429     GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Sent HELLO, have %d remaining!\n", send_hello_context->pg->remaining_hellos);
3430 #endif
3431     if (send_hello_context->peer_pos == NULL) /* All HELLOs (for this peer!) have been transmitted! */
3432       {
3433 #if DEBUG_TESTING
3434         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "All hellos for this peer sent, disconnecting transport!\n");
3435 #endif
3436         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3437         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3438         send_hello_context->peer->daemon->th = NULL;
3439
3440         /*if (send_hello_context->pg->remaining_hellos == 0)
3441          {
3442          for (pg_iter = 0; pg_iter < send_hello_context->pg->max_outstanding_connections; pg_iter++)
3443          {
3444          preschedule_connect(&send_hello_context->pg->ct_ctx);
3445          }
3446          }
3447          */
3448         GNUNET_assert (send_hello_context->peer->daemon->server == NULL);
3449         send_hello_context->peer->daemon->server = GNUNET_CORE_connect(send_hello_context->peer->cfg,
3450             1,
3451             send_hello_context,
3452             &core_init,
3453             &core_connect_notify,
3454             NULL,
3455             NULL,
3456             NULL, GNUNET_NO,
3457             NULL, GNUNET_NO,
3458             no_handlers);
3459
3460         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),
3461             &send_core_connect_requests,
3462             send_hello_context);
3463       }
3464     else
3465     GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3466   }
3467
3468 /**
3469  * Connect to a peer, give it all the HELLO's of those peers
3470  * we will later ask it to connect to.
3471  *
3472  * @param ct_ctx the overall connection context
3473  */
3474 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3475   {
3476     struct SendHelloContext *send_hello_context = cls;
3477     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3478
3479     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3480       {
3481         GNUNET_free(send_hello_context);
3482         return;
3483       }
3484
3485     GNUNET_assert(send_hello_context->peer_pos != NULL); /* All of the HELLO sends to be scheduled have been scheduled! */
3486
3487     if (((send_hello_context->peer->daemon->th == NULL) &&
3488             (pg->outstanding_connects > pg->max_outstanding_connections)) ||
3489         (pg->stop_connects == GNUNET_YES))
3490       {
3491 #if VERBOSE_TESTING > 2
3492         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3493             _
3494             ("Delaying connect, we have too many outstanding connections!\n"));
3495 #endif
3496         GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3497             (GNUNET_TIME_UNIT_MILLISECONDS, 100),
3498             &schedule_send_hellos, send_hello_context);
3499       }
3500     else
3501       {
3502 #if VERBOSE_TESTING > 2
3503         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3504             _("Creating connection, outstanding_connections is %d\n"),
3505             outstanding_connects);
3506 #endif
3507         if (send_hello_context->peer->daemon->th == NULL)
3508           {
3509             pg->outstanding_connects++; /* Actual TRANSPORT, CORE connections! */
3510             send_hello_context->peer->daemon->th
3511                 = GNUNET_TRANSPORT_connect (send_hello_context->peer->cfg, NULL,
3512                                             send_hello_context, NULL, NULL, NULL);
3513           }
3514 #if DEBUG_TESTING
3515         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3516             _("Offering Hello of peer %s to peer %s\n"),
3517             send_hello_context->peer->daemon->shortname, pg->peers[send_hello_context->peer_pos->index].daemon->shortname);
3518 #endif
3519         GNUNET_TRANSPORT_offer_hello(send_hello_context->peer->daemon->th,
3520             (const struct GNUNET_MessageHeader *)pg->peers[send_hello_context->peer_pos->index].daemon->hello,
3521             &hello_sent_callback,
3522             send_hello_context);
3523         send_hello_context->peer_pos = send_hello_context->peer_pos->next;
3524         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3525       }
3526   }
3527 #endif
3528
3529 /**
3530  * Internal notification of a connection, kept so that we can ensure some connections
3531  * happen instead of flooding all testing daemons with requests to connect.
3532  */
3533 static void
3534 internal_connect_notify(void *cls, const struct GNUNET_PeerIdentity *first,
3535                         const struct GNUNET_PeerIdentity *second,
3536                         uint32_t distance,
3537                         const struct GNUNET_CONFIGURATION_Handle *first_cfg,
3538                         const struct GNUNET_CONFIGURATION_Handle *second_cfg,
3539                         struct GNUNET_TESTING_Daemon *first_daemon,
3540                         struct GNUNET_TESTING_Daemon *second_daemon,
3541                         const char *emsg)
3542 {
3543   struct ConnectContext *connect_ctx = cls;
3544   struct ConnectTopologyContext *ct_ctx = connect_ctx->ct_ctx;
3545   struct GNUNET_TESTING_PeerGroup *pg = ct_ctx->pg;
3546   struct PeerConnection *connection;
3547
3548   GNUNET_assert (0 < pg->outstanding_connects);
3549   pg->outstanding_connects--;
3550
3551   /*
3552    * Check whether the inverse connection has been scheduled yet,
3553    * if not, we can remove it from the other peers list and avoid
3554    * even trying to connect them again!
3555    */
3556   connection = pg->peers[connect_ctx->second_index].connect_peers_head;
3557 #if BAD
3558   other_peer = NULL;
3559 #endif
3560
3561   while ((connection != NULL) && (0
3562       != memcmp (first, &pg->peers[connection->index].daemon->id,
3563                  sizeof(struct GNUNET_PeerIdentity))))
3564     {
3565       connection = connection->next;
3566     }
3567
3568   if (connection != NULL) /* Can safely remove! */
3569     {
3570       GNUNET_assert (0 < ct_ctx->remaining_connections);
3571       ct_ctx->remaining_connections--;
3572       if (pg->notify_connection != NULL) /* Notify of reverse connection */
3573         pg->notify_connection (pg->notify_connection_cls, second, first,
3574                                distance, second_cfg, first_cfg, second_daemon,
3575                                first_daemon, emsg);
3576
3577       GNUNET_CONTAINER_DLL_remove(pg->peers[connect_ctx->second_index].connect_peers_head, pg->peers[connect_ctx->second_index].connect_peers_tail, connection);
3578       GNUNET_free(connection);
3579     }
3580
3581   if (ct_ctx->remaining_connections == 0)
3582     {
3583       if (ct_ctx->notify_connections_done != NULL)
3584         {
3585           ct_ctx->notify_connections_done (ct_ctx->notify_cls, NULL);
3586           ct_ctx->notify_connections_done = NULL;
3587         }
3588     }
3589   else
3590     preschedule_connect (pg);
3591
3592   if (pg->notify_connection != NULL)
3593     pg->notify_connection (pg->notify_connection_cls, first, second, distance,
3594                            first_cfg, second_cfg, first_daemon, second_daemon,
3595                            emsg);
3596
3597   GNUNET_free(connect_ctx);
3598 }
3599
3600 /**
3601  * Either delay a connection (because there are too many outstanding)
3602  * or schedule it for right now.
3603  *
3604  * @param cls a connection context
3605  * @param tc the task runtime context
3606  */
3607 static void
3608 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3609 {
3610   struct ConnectContext *connect_context = cls;
3611   struct GNUNET_TESTING_PeerGroup *pg = connect_context->ct_ctx->pg;
3612
3613   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3614     return;
3615
3616   if ((pg->outstanding_connects > pg->max_outstanding_connections)
3617       || (pg->stop_connects == GNUNET_YES))
3618     {
3619 #if VERBOSE_TESTING
3620       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3621           _
3622           ("Delaying connect, we have too many outstanding connections!\n"));
3623 #endif
3624       GNUNET_SCHEDULER_add_delayed (
3625                                     GNUNET_TIME_relative_multiply (
3626                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
3627                                                                    100),
3628                                     &schedule_connect, connect_context);
3629     }
3630   else
3631     {
3632 #if VERBOSE_TESTING
3633       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3634           _("Creating connection, outstanding_connections is %d (max %d)\n"),
3635           pg->outstanding_connects, pg->max_outstanding_connections);
3636 #endif
3637       pg->outstanding_connects++;
3638       pg->total_connects_scheduled++;
3639       GNUNET_TESTING_daemons_connect (
3640                                       pg->peers[connect_context->first_index].daemon,
3641                                       pg->peers[connect_context->second_index].daemon,
3642                                       connect_context->ct_ctx->connect_timeout,
3643                                       connect_context->ct_ctx->connect_attempts,
3644 #if USE_SEND_HELLOS
3645                                       GNUNET_NO,
3646 #else
3647                                       GNUNET_YES,
3648 #endif
3649                                       &internal_connect_notify, connect_context); /* FIXME: free connect context! */
3650     }
3651 }
3652
3653 #if !OLD
3654 /**
3655  * Iterator for actually scheduling connections to be created
3656  * between two peers.
3657  *
3658  * @param cls closure, a GNUNET_TESTING_Daemon
3659  * @param key the key the second Daemon was stored under
3660  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3661  *
3662  * @return GNUNET_YES to continue iteration
3663  */
3664 static int
3665 connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3666   {
3667     struct ConnectTopologyContext *ct_ctx = cls;
3668     struct PeerData *first = ct_ctx->first;
3669     struct GNUNET_TESTING_Daemon *second = value;
3670     struct ConnectContext *connect_context;
3671
3672     connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3673     connect_context->first = first->daemon;
3674     connect_context->second = second;
3675     connect_context->ct_ctx = ct_ctx;
3676     GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3677
3678     return GNUNET_YES;
3679   }
3680 #endif
3681
3682 #if !OLD
3683 /**
3684  * Iterator for copying all entries in the allowed hashmap to the
3685  * connect hashmap.
3686  *
3687  * @param cls closure, a GNUNET_TESTING_Daemon
3688  * @param key the key the second Daemon was stored under
3689  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3690  *
3691  * @return GNUNET_YES to continue iteration
3692  */
3693 static int
3694 copy_topology_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3695   {
3696     struct PeerData *first = cls;
3697
3698     GNUNET_assert (GNUNET_OK ==
3699         GNUNET_CONTAINER_multihashmap_put (first->connect_peers, key,
3700             value,
3701             GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
3702
3703     return GNUNET_YES;
3704   }
3705 #endif
3706
3707 /**
3708  * Make the peers to connect the same as those that are allowed to be
3709  * connected.
3710  *
3711  * @param pg the peer group
3712  */
3713 static int
3714 copy_allowed_topology(struct GNUNET_TESTING_PeerGroup *pg)
3715 {
3716   unsigned int pg_iter;
3717   int ret;
3718   int total;
3719 #if OLD
3720   struct PeerConnection *iter;
3721 #endif
3722   total = 0;
3723   ret = 0;
3724   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3725     {
3726 #if OLD
3727       iter = pg->peers[pg_iter].allowed_peers_head;
3728       while (iter != NULL)
3729         {
3730           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3731                       "Creating connection between %d and %d\n", pg_iter,
3732                       iter->index);
3733           total += add_connections (pg, pg_iter, iter->index, CONNECT,
3734                                     GNUNET_YES);
3735           //total += add_actual_connections(pg, pg_iter, iter->index);
3736           iter = iter->next;
3737         }
3738 #else
3739       ret =
3740       GNUNET_CONTAINER_multihashmap_iterate (pg->
3741           peers[pg_iter].allowed_peers,
3742           &copy_topology_iterator,
3743           &pg->peers[pg_iter]);
3744 #endif
3745       if (GNUNET_SYSERR == ret)
3746         return GNUNET_SYSERR;
3747
3748       total = total + ret;
3749     }
3750
3751   return total;
3752 }
3753
3754 /**
3755  * Connect the topology as specified by the PeerConnection's
3756  * of each peer in the peer group
3757  *
3758  * @param pg the peer group we are dealing with
3759  * @param connect_timeout how long try connecting two peers
3760  * @param connect_attempts how many times (max) to attempt
3761  * @param notify_callback callback to notify when finished
3762  * @param notify_cls closure for notify callback
3763  *
3764  * @return the number of connections that will be attempted
3765  */
3766 static int
3767 connect_topology(struct GNUNET_TESTING_PeerGroup *pg,
3768                  struct GNUNET_TIME_Relative connect_timeout,
3769                  unsigned int connect_attempts,
3770                  GNUNET_TESTING_NotifyCompletion notify_callback,
3771                  void *notify_cls)
3772 {
3773   unsigned int pg_iter;
3774   unsigned int total;
3775
3776 #if OLD
3777   struct PeerConnection *connection_iter;
3778 #endif
3779 #if USE_SEND_HELLOS
3780   struct SendHelloContext *send_hello_context;
3781 #endif
3782
3783   total = 0;
3784   pg->ct_ctx.notify_connections_done = notify_callback;
3785   pg->ct_ctx.notify_cls = notify_cls;
3786   pg->ct_ctx.pg = pg;
3787
3788   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3789     {
3790 #if OLD
3791       connection_iter = pg->peers[pg_iter].connect_peers_head;
3792       while (connection_iter != NULL)
3793         {
3794           connection_iter = connection_iter->next;
3795           total++;
3796         }
3797 #else
3798       total +=
3799       GNUNET_CONTAINER_multihashmap_size (pg->peers[pg_iter].connect_peers);
3800 #endif
3801     }
3802
3803   if (total == 0)
3804     return total;
3805
3806   pg->ct_ctx.connect_timeout = connect_timeout;
3807   pg->ct_ctx.connect_attempts = connect_attempts;
3808   pg->ct_ctx.remaining_connections = total;
3809
3810 #if USE_SEND_HELLOS
3811   /* First give all peers the HELLO's of other peers (connect to first peer's transport service, give HELLO's of other peers, continue...) */
3812   pg->remaining_hellos = total;
3813   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3814     {
3815       send_hello_context = GNUNET_malloc(sizeof(struct SendHelloContext));
3816       send_hello_context->peer = &pg->peers[pg_iter];
3817       send_hello_context->peer_pos = pg->peers[pg_iter].connect_peers_head;
3818       send_hello_context->pg = pg;
3819       GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3820     }
3821 #else
3822   for (pg_iter = 0; pg_iter < pg->max_outstanding_connections; pg_iter++)
3823     {
3824       preschedule_connect (pg);
3825     }
3826 #endif
3827   return total;
3828
3829 }
3830
3831 /**
3832  * Takes a peer group and creates a topology based on the
3833  * one specified.  Creates a topology means generates friend
3834  * files for the peers so they can only connect to those allowed
3835  * by the topology.  This will only have an effect once peers
3836  * are started if the FRIENDS_ONLY option is set in the base
3837  * config.  Also takes an optional restrict topology which
3838  * disallows connections based on particular transports
3839  * UNLESS they are specified in the restricted topology.
3840  *
3841  * @param pg the peer group struct representing the running peers
3842  * @param topology which topology to connect the peers in
3843  * @param restrict_topology disallow restrict_transports transport
3844  *                          connections to peers NOT in this topology
3845  *                          use GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
3846  * @param restrict_transports space delimited list of transports to blacklist
3847  *                            to create restricted topology
3848  *
3849  * @return the maximum number of connections were all allowed peers
3850  *         connected to each other
3851  */
3852 unsigned int
3853 GNUNET_TESTING_create_topology(struct GNUNET_TESTING_PeerGroup *pg,
3854                                enum GNUNET_TESTING_Topology topology,
3855                                enum GNUNET_TESTING_Topology restrict_topology,
3856                                const char *restrict_transports)
3857 {
3858   int ret;
3859
3860   unsigned int num_connections;
3861   int unblacklisted_connections;
3862   char *filename;
3863   struct PeerConnection *conn_iter;
3864   struct PeerConnection *temp_conn;
3865   unsigned int off;
3866
3867 #if !OLD
3868   unsigned int i;
3869   for (i = 0; i < pg->total; i++)
3870     {
3871       pg->peers[i].allowed_peers =
3872       GNUNET_CONTAINER_multihashmap_create (100);
3873       pg->peers[i].connect_peers =
3874       GNUNET_CONTAINER_multihashmap_create (100);
3875       pg->peers[i].blacklisted_peers =
3876       GNUNET_CONTAINER_multihashmap_create (100);
3877       pg->peers[i].pg = pg;
3878     }
3879 #endif
3880
3881   switch (topology)
3882     {
3883   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3884 #if VERBOSE_TESTING
3885     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating clique topology\n"));
3886 #endif
3887     num_connections = create_clique (pg, &add_connections, ALLOWED, GNUNET_NO);
3888     break;
3889   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
3890 #if VERBOSE_TESTING
3891     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3892         _("Creating small world (ring) topology\n"));
3893 #endif
3894     num_connections = create_small_world_ring (pg, &add_connections, ALLOWED);
3895     break;
3896   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
3897 #if VERBOSE_TESTING
3898     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3899         _("Creating small world (2d-torus) topology\n"));
3900 #endif
3901     num_connections = create_small_world (pg, &add_connections, ALLOWED);
3902     break;
3903   case GNUNET_TESTING_TOPOLOGY_RING:
3904 #if VERBOSE_TESTING
3905     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring topology\n"));
3906 #endif
3907     num_connections = create_ring (pg, &add_connections, ALLOWED);
3908     break;
3909   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
3910 #if VERBOSE_TESTING
3911     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating 2d torus topology\n"));
3912 #endif
3913     num_connections = create_2d_torus (pg, &add_connections, ALLOWED);
3914     break;
3915   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
3916 #if VERBOSE_TESTING
3917     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3918         _("Creating Erdos-Renyi topology\n"));
3919 #endif
3920     num_connections = create_erdos_renyi (pg, &add_connections, ALLOWED);
3921     break;
3922   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
3923 #if VERBOSE_TESTING
3924     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating InterNAT topology\n"));
3925 #endif
3926     num_connections = create_nated_internet (pg, &add_connections, ALLOWED);
3927     break;
3928   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
3929 #if VERBOSE_TESTING
3930     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3931         _("Creating Scale Free topology\n"));
3932 #endif
3933     num_connections = create_scale_free (pg, &add_connections, ALLOWED);
3934     break;
3935   case GNUNET_TESTING_TOPOLOGY_LINE:
3936 #if VERBOSE_TESTING
3937     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3938         _("Creating straight line topology\n"));
3939 #endif
3940     num_connections = create_line (pg, &add_connections, ALLOWED);
3941     break;
3942   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
3943 #if VERBOSE_TESTING
3944     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3945         _("Creating topology from file!\n"));
3946 #endif
3947     if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "testing",
3948                                                             "topology_file",
3949                                                             &filename))
3950       num_connections = create_from_file (pg, filename, &add_connections,
3951                                           ALLOWED);
3952     else
3953       {
3954         GNUNET_log (
3955                     GNUNET_ERROR_TYPE_WARNING,
3956                     "Missing configuration option TESTING:TOPOLOGY_FILE for creating topology from file!\n");
3957         num_connections = 0;
3958       }
3959     break;
3960   case GNUNET_TESTING_TOPOLOGY_NONE:
3961 #if VERBOSE_TESTING
3962     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3963         _
3964         ("Creating no allowed topology (all peers can connect at core level)\n"));
3965 #endif
3966     num_connections = pg->total * pg->total; /* Clique is allowed! */
3967     break;
3968   default:
3969     num_connections = 0;
3970     break;
3971     }
3972
3973   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "TESTING",
3974                                                           "F2F"))
3975     {
3976       ret = create_and_copy_friend_files (pg);
3977       if (ret != GNUNET_OK)
3978         {
3979 #if VERBOSE_TESTING
3980           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3981               _("Failed during friend file copying!\n"));
3982 #endif
3983           return GNUNET_SYSERR;
3984         }
3985       else
3986         {
3987 #if VERBOSE_TESTING
3988           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3989               _("Friend files created/copied successfully!\n"));
3990 #endif
3991         }
3992     }
3993
3994   /* Use the create clique method to initially set all connections as blacklisted. */
3995   if ((restrict_topology != GNUNET_TESTING_TOPOLOGY_NONE) && (restrict_topology
3996       != GNUNET_TESTING_TOPOLOGY_FROM_FILE))
3997     create_clique (pg, &add_connections, BLACKLIST, GNUNET_NO);
3998   else
3999     return num_connections;
4000
4001   unblacklisted_connections = 0;
4002   /* Un-blacklist connections as per the topology specified */
4003   switch (restrict_topology)
4004     {
4005   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
4006 #if VERBOSE_TESTING
4007     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4008         _("Blacklisting all but clique topology\n"));
4009 #endif
4010     unblacklisted_connections = create_clique (pg, &remove_connections,
4011                                                BLACKLIST, GNUNET_NO);
4012     break;
4013   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
4014 #if VERBOSE_TESTING
4015     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4016         _("Blacklisting all but small world (ring) topology\n"));
4017 #endif
4018     unblacklisted_connections = create_small_world_ring (pg,
4019                                                          &remove_connections,
4020                                                          BLACKLIST);
4021     break;
4022   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
4023 #if VERBOSE_TESTING
4024     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4025         _
4026         ("Blacklisting all but small world (2d-torus) topology\n"));
4027 #endif
4028     unblacklisted_connections = create_small_world (pg, &remove_connections,
4029                                                     BLACKLIST);
4030     break;
4031   case GNUNET_TESTING_TOPOLOGY_RING:
4032 #if VERBOSE_TESTING
4033     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4034         _("Blacklisting all but ring topology\n"));
4035 #endif
4036     unblacklisted_connections
4037         = create_ring (pg, &remove_connections, BLACKLIST);
4038     break;
4039   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
4040 #if VERBOSE_TESTING
4041     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4042         _("Blacklisting all but 2d torus topology\n"));
4043 #endif
4044     unblacklisted_connections = create_2d_torus (pg, &remove_connections,
4045                                                  BLACKLIST);
4046     break;
4047   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
4048 #if VERBOSE_TESTING
4049     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4050         _("Blacklisting all but Erdos-Renyi topology\n"));
4051 #endif
4052     unblacklisted_connections = create_erdos_renyi (pg, &remove_connections,
4053                                                     BLACKLIST);
4054     break;
4055   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
4056 #if VERBOSE_TESTING
4057     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4058         _("Blacklisting all but InterNAT topology\n"));
4059 #endif
4060
4061 #if TOPOLOGY_HACK
4062     for (off = 0; off < pg->total; off++)
4063       {
4064         conn_iter = pg->peers[off].allowed_peers_head;
4065         while (conn_iter != NULL)
4066           {
4067             temp_conn = conn_iter->next;
4068             GNUNET_free(conn_iter);
4069             conn_iter = temp_conn;
4070           }
4071         pg->peers[off].allowed_peers_head = NULL;
4072         pg->peers[off].allowed_peers_tail = NULL;
4073
4074         conn_iter = pg->peers[off].connect_peers_head;
4075         while (conn_iter != NULL)
4076           {
4077             temp_conn = conn_iter->next;
4078             GNUNET_free(conn_iter);
4079             conn_iter = temp_conn;
4080           }
4081         pg->peers[off].connect_peers_head = NULL;
4082         pg->peers[off].connect_peers_tail = NULL;
4083       }
4084     unblacklisted_connections
4085         = create_nated_internet_copy (pg, &remove_connections, BLACKLIST);
4086 #else
4087     unblacklisted_connections =
4088     create_nated_internet (pg, &remove_connections, BLACKLIST);
4089 #endif
4090
4091     break;
4092   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
4093 #if VERBOSE_TESTING
4094     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4095         _("Blacklisting all but Scale Free topology\n"));
4096 #endif
4097     unblacklisted_connections = create_scale_free (pg, &remove_connections,
4098                                                    BLACKLIST);
4099     break;
4100   case GNUNET_TESTING_TOPOLOGY_LINE:
4101 #if VERBOSE_TESTING
4102     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4103         _("Blacklisting all but straight line topology\n"));
4104 #endif
4105     unblacklisted_connections
4106         = create_line (pg, &remove_connections, BLACKLIST);
4107   default:
4108     break;
4109     }
4110
4111   if ((unblacklisted_connections > 0) && (restrict_transports != NULL))
4112     {
4113       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Creating blacklist with `%s'\n",
4114                   restrict_transports);
4115       ret = create_and_copy_blacklist_files (pg, restrict_transports);
4116       if (ret != GNUNET_OK)
4117         {
4118 #if VERBOSE_TESTING
4119           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4120               _("Failed during blacklist file copying!\n"));
4121 #endif
4122           return 0;
4123         }
4124       else
4125         {
4126 #if VERBOSE_TESTING
4127           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4128               _("Blacklist files created/copied successfully!\n"));
4129 #endif
4130         }
4131     }
4132   return num_connections;
4133 }
4134
4135 #if !OLD
4136 /**
4137  * Iterator for choosing random peers to connect.
4138  *
4139  * @param cls closure, a RandomContext
4140  * @param key the key the second Daemon was stored under
4141  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4142  *
4143  * @return GNUNET_YES to continue iteration
4144  */
4145 static int
4146 random_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4147   {
4148     struct RandomContext *random_ctx = cls;
4149     double random_number;
4150     uint32_t second_pos;
4151     GNUNET_HashCode first_hash;
4152     random_number =
4153     ((double)
4154         GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4155             UINT64_MAX)) / ((double) UINT64_MAX);
4156     if (random_number < random_ctx->percentage)
4157       {
4158         GNUNET_assert (GNUNET_OK ==
4159             GNUNET_CONTAINER_multihashmap_put (random_ctx->
4160                 first->connect_peers_working_set,
4161                 key, value,
4162                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4163       }
4164
4165     /* Now we have considered this particular connection, remove it from the second peer so it's not double counted */
4166     uid_from_hash (key, &second_pos);
4167     hash_from_uid (random_ctx->first_uid, &first_hash);
4168     GNUNET_assert (random_ctx->pg->total > second_pos);
4169     GNUNET_assert (GNUNET_YES ==
4170         GNUNET_CONTAINER_multihashmap_remove (random_ctx->
4171             pg->peers
4172             [second_pos].connect_peers,
4173             &first_hash,
4174             random_ctx->
4175             first->daemon));
4176
4177     return GNUNET_YES;
4178   }
4179
4180 /**
4181  * Iterator for adding at least X peers to a peers connection set.
4182  *
4183  * @param cls closure, MinimumContext
4184  * @param key the key the second Daemon was stored under
4185  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4186  *
4187  * @return GNUNET_YES to continue iteration
4188  */
4189 static int
4190 minimum_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4191   {
4192     struct MinimumContext *min_ctx = cls;
4193     uint32_t second_pos;
4194     GNUNET_HashCode first_hash;
4195     unsigned int i;
4196
4197     if (GNUNET_CONTAINER_multihashmap_size
4198         (min_ctx->first->connect_peers_working_set) < min_ctx->num_to_add)
4199       {
4200         for (i = 0; i < min_ctx->num_to_add; i++)
4201           {
4202             if (min_ctx->pg_array[i] == min_ctx->current)
4203               {
4204                 GNUNET_assert (GNUNET_OK ==
4205                     GNUNET_CONTAINER_multihashmap_put
4206                     (min_ctx->first->connect_peers_working_set, key,
4207                         value,
4208                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4209                 uid_from_hash (key, &second_pos);
4210                 hash_from_uid (min_ctx->first_uid, &first_hash);
4211                 GNUNET_assert (min_ctx->pg->total > second_pos);
4212                 GNUNET_assert (GNUNET_OK ==
4213                     GNUNET_CONTAINER_multihashmap_put (min_ctx->
4214                         pg->peers
4215                         [second_pos].connect_peers_working_set,
4216                         &first_hash,
4217                         min_ctx->first->
4218                         daemon,
4219                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4220                 /* Now we have added this particular connection, remove it from the second peer's map so it's not double counted */
4221                 GNUNET_assert (GNUNET_YES ==
4222                     GNUNET_CONTAINER_multihashmap_remove
4223                     (min_ctx->pg->peers[second_pos].connect_peers,
4224                         &first_hash, min_ctx->first->daemon));
4225               }
4226           }
4227         min_ctx->current++;
4228         return GNUNET_YES;
4229       }
4230     else
4231     return GNUNET_NO; /* We can stop iterating, we have enough peers! */
4232
4233   }
4234
4235 /**
4236  * Iterator for adding peers to a connection set based on a depth first search.
4237  *
4238  * @param cls closure, MinimumContext
4239  * @param key the key the second daemon was stored under
4240  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4241  *
4242  * @return GNUNET_YES to continue iteration
4243  */
4244 static int
4245 dfs_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4246   {
4247     struct DFSContext *dfs_ctx = cls;
4248     GNUNET_HashCode first_hash;
4249
4250     if (dfs_ctx->current == dfs_ctx->chosen)
4251       {
4252         GNUNET_assert (GNUNET_OK ==
4253             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4254                 first->connect_peers_working_set,
4255                 key, value,
4256                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4257         uid_from_hash (key, &dfs_ctx->second_uid);
4258         hash_from_uid (dfs_ctx->first_uid, &first_hash);
4259         GNUNET_assert (GNUNET_OK ==
4260             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4261                 pg->peers
4262                 [dfs_ctx->second_uid].connect_peers_working_set,
4263                 &first_hash,
4264                 dfs_ctx->
4265                 first->daemon,
4266                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4267         GNUNET_assert (GNUNET_YES ==
4268             GNUNET_CONTAINER_multihashmap_remove (dfs_ctx->
4269                 pg->peers
4270                 [dfs_ctx->second_uid].connect_peers,
4271                 &first_hash,
4272                 dfs_ctx->
4273                 first->daemon));
4274         /* Can't remove second from first yet because we are currently iterating, hence the return value in the DFSContext! */
4275         return GNUNET_NO; /* We have found our peer, don't iterate more */
4276       }
4277
4278     dfs_ctx->current++;
4279     return GNUNET_YES;
4280   }
4281 #endif
4282
4283 /**
4284  * From the set of connections possible, choose percentage percent of connections
4285  * to actually connect.
4286  *
4287  * @param pg the peergroup we are dealing with
4288  * @param percentage what percent of total connections to make
4289  */
4290 void
4291 choose_random_connections(struct GNUNET_TESTING_PeerGroup *pg,
4292                           double percentage)
4293 {
4294   uint32_t pg_iter;
4295 #if OLD
4296   struct PeerConnection *conn_iter;
4297   double random_number;
4298 #else
4299   struct RandomContext random_ctx;
4300 #endif
4301
4302   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4303     {
4304 #if OLD
4305       conn_iter = pg->peers[pg_iter].connect_peers_head;
4306       while (conn_iter != NULL)
4307         {
4308           random_number
4309               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4310                                                     UINT64_MAX))
4311                   / ((double) UINT64_MAX);
4312           if (random_number < percentage)
4313             {
4314               add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4315                                GNUNET_YES);
4316             }
4317           conn_iter = conn_iter->next;
4318         }
4319 #else
4320       random_ctx.first_uid = pg_iter;
4321       random_ctx.first = &pg->peers[pg_iter];
4322       random_ctx.percentage = percentage;
4323       random_ctx.pg = pg;
4324       pg->peers[pg_iter].connect_peers_working_set
4325         = GNUNET_CONTAINER_multihashmap_create (pg->total);
4326       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4327                                              &random_connect_iterator,
4328                                              &random_ctx);
4329       /* Now remove the old connections */
4330       GNUNET_CONTAINER_multihashmap_destroy (pg->
4331                                              peers[pg_iter].connect_peers);
4332       /* And replace with the random set */
4333       pg->peers[pg_iter].connect_peers
4334         = pg->peers[pg_iter].connect_peers_working_set;
4335 #endif
4336     }
4337
4338   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4339     {
4340       conn_iter = pg->peers[pg_iter].connect_peers_head;
4341       while (pg->peers[pg_iter].connect_peers_head != NULL)
4342         remove_connections (pg, pg_iter,
4343                             pg->peers[pg_iter].connect_peers_head->index,
4344                             CONNECT, GNUNET_YES);
4345
4346       pg->peers[pg_iter].connect_peers_head
4347           = pg->peers[pg_iter].connect_peers_working_set_head;
4348       pg->peers[pg_iter].connect_peers_tail
4349           = pg->peers[pg_iter].connect_peers_working_set_tail;
4350       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4351       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4352     }
4353 }
4354
4355 /**
4356  * Count the number of connections in a linked list of connections.
4357  *
4358  * @param conn_list the connection list to get the count of
4359  *
4360  * @return the number of elements in the list
4361  */
4362 static unsigned int
4363 count_connections(struct PeerConnection *conn_list)
4364 {
4365   struct PeerConnection *iter;
4366   unsigned int count;
4367   count = 0;
4368   iter = conn_list;
4369   while (iter != NULL)
4370     {
4371       iter = iter->next;
4372       count++;
4373     }
4374   return count;
4375 }
4376
4377 static unsigned int
4378 count_workingset_connections(struct GNUNET_TESTING_PeerGroup *pg)
4379 {
4380   unsigned int count;
4381   unsigned int pg_iter;
4382 #if OLD
4383   struct PeerConnection *conn_iter;
4384 #endif
4385   count = 0;
4386
4387   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4388     {
4389 #if OLD
4390       conn_iter = pg->peers[pg_iter].connect_peers_working_set_head;
4391       while (conn_iter != NULL)
4392         {
4393           count++;
4394           conn_iter = conn_iter->next;
4395         }
4396 #else
4397       count +=
4398       GNUNET_CONTAINER_multihashmap_size (pg->
4399           peers
4400           [pg_iter].connect_peers_working_set);
4401 #endif
4402     }
4403
4404   return count;
4405 }
4406
4407 static unsigned int
4408 count_allowed_connections(struct GNUNET_TESTING_PeerGroup *pg)
4409 {
4410   unsigned int count;
4411   unsigned int pg_iter;
4412 #if OLD
4413   struct PeerConnection *conn_iter;
4414 #endif
4415
4416   count = 0;
4417   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4418     {
4419 #if OLD
4420       conn_iter = pg->peers[pg_iter].allowed_peers_head;
4421       while (conn_iter != NULL)
4422         {
4423           count++;
4424           conn_iter = conn_iter->next;
4425         }
4426 #else
4427       count +=
4428       GNUNET_CONTAINER_multihashmap_size (pg->
4429           peers
4430           [pg_iter].allowed_peers);
4431 #endif
4432     }
4433
4434   return count;
4435 }
4436
4437 /**
4438  * From the set of connections possible, choose at least num connections per
4439  * peer.
4440  *
4441  * @param pg the peergroup we are dealing with
4442  * @param num how many connections at least should each peer have (if possible)?
4443  */
4444 static void
4445 choose_minimum(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4446 {
4447 #if !OLD
4448   struct MinimumContext minimum_ctx;
4449 #else
4450   struct PeerConnection *conn_iter;
4451   unsigned int temp_list_size;
4452   unsigned int i;
4453   unsigned int count;
4454   uint32_t random; /* Random list entry to connect peer to */
4455 #endif
4456   uint32_t pg_iter;
4457
4458 #if OLD
4459   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4460     {
4461       temp_list_size
4462           = count_connections (pg->peers[pg_iter].connect_peers_head);
4463       if (temp_list_size == 0)
4464         {
4465           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4466                       "Peer %d has 0 connections!?!?\n", pg_iter);
4467           break;
4468         }
4469       for (i = 0; i < num; i++)
4470         {
4471           random = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4472                                              temp_list_size);
4473           conn_iter = pg->peers[pg_iter].connect_peers_head;
4474           for (count = 0; count < random; count++)
4475             conn_iter = conn_iter->next;
4476           /* We now have a random connection, connect it! */
4477           GNUNET_assert(conn_iter != NULL);
4478           add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4479                            GNUNET_YES);
4480         }
4481     }
4482 #else
4483   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4484     {
4485       pg->peers[pg_iter].connect_peers_working_set =
4486       GNUNET_CONTAINER_multihashmap_create (num);
4487     }
4488
4489   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4490     {
4491       minimum_ctx.first_uid = pg_iter;
4492       minimum_ctx.pg_array =
4493       GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
4494           GNUNET_CONTAINER_multihashmap_size
4495           (pg->peers[pg_iter].connect_peers));
4496       minimum_ctx.first = &pg->peers[pg_iter];
4497       minimum_ctx.pg = pg;
4498       minimum_ctx.num_to_add = num;
4499       minimum_ctx.current = 0;
4500       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4501           &minimum_connect_iterator,
4502           &minimum_ctx);
4503     }
4504
4505   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4506     {
4507       /* Remove the "old" connections */
4508       GNUNET_CONTAINER_multihashmap_destroy (pg->
4509           peers[pg_iter].connect_peers);
4510       /* And replace with the working set */
4511       pg->peers[pg_iter].connect_peers =
4512       pg->peers[pg_iter].connect_peers_working_set;
4513     }
4514 #endif
4515   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4516     {
4517       while (pg->peers[pg_iter].connect_peers_head != NULL)
4518         {
4519           conn_iter = pg->peers[pg_iter].connect_peers_head;
4520           GNUNET_CONTAINER_DLL_remove(pg->peers[pg_iter].connect_peers_head,
4521               pg->peers[pg_iter].connect_peers_tail,
4522               conn_iter);
4523           GNUNET_free(conn_iter);
4524           /*remove_connections(pg, pg_iter, pg->peers[pg_iter].connect_peers_head->index, CONNECT, GNUNET_YES);*/
4525         }
4526
4527       pg->peers[pg_iter].connect_peers_head
4528           = pg->peers[pg_iter].connect_peers_working_set_head;
4529       pg->peers[pg_iter].connect_peers_tail
4530           = pg->peers[pg_iter].connect_peers_working_set_tail;
4531       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4532       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4533     }
4534 }
4535
4536 #if !OLD
4537 struct FindClosestContext
4538   {
4539     /**
4540      * The currently known closest peer.
4541      */
4542     struct GNUNET_TESTING_Daemon *closest;
4543
4544     /**
4545      * The info for the peer we are adding connections for.
4546      */
4547     struct PeerData *curr_peer;
4548
4549     /**
4550      * The distance (bits) between the current
4551      * peer and the currently known closest.
4552      */
4553     unsigned int closest_dist;
4554
4555     /**
4556      * The offset of the closest known peer in
4557      * the peer group.
4558      */
4559     unsigned int closest_num;
4560   };
4561
4562 /**
4563  * Iterator over hash map entries of the allowed
4564  * peer connections.  Find the closest, not already
4565  * connected peer and return it.
4566  *
4567  * @param cls closure (struct FindClosestContext)
4568  * @param key current key code (hash of offset in pg)
4569  * @param value value in the hash map - a GNUNET_TESTING_Daemon
4570  * @return GNUNET_YES if we should continue to
4571  *         iterate,
4572  *         GNUNET_NO if not.
4573  */
4574 static int
4575 find_closest_peers (void *cls, const GNUNET_HashCode * key, void *value)
4576   {
4577     struct FindClosestContext *closest_ctx = cls;
4578     struct GNUNET_TESTING_Daemon *daemon = value;
4579
4580     if (((closest_ctx->closest == NULL) ||
4581             (GNUNET_CRYPTO_hash_matching_bits
4582                 (&daemon->id.hashPubKey,
4583                     &closest_ctx->curr_peer->daemon->id.hashPubKey) >
4584                 closest_ctx->closest_dist))
4585         && (GNUNET_YES !=
4586             GNUNET_CONTAINER_multihashmap_contains (closest_ctx->
4587                 curr_peer->connect_peers,
4588                 key)))
4589       {
4590         closest_ctx->closest_dist =
4591         GNUNET_CRYPTO_hash_matching_bits (&daemon->id.hashPubKey,
4592             &closest_ctx->curr_peer->daemon->
4593             id.hashPubKey);
4594         closest_ctx->closest = daemon;
4595         uid_from_hash (key, &closest_ctx->closest_num);
4596       }
4597     return GNUNET_YES;
4598   }
4599
4600 /**
4601  * From the set of connections possible, choose at num connections per
4602  * peer based on depth which are closest out of those allowed.  Guaranteed
4603  * to add num peers to connect to, provided there are that many peers
4604  * in the underlay topology to connect to.
4605  *
4606  * @param pg the peergroup we are dealing with
4607  * @param num how many connections at least should each peer have (if possible)?
4608  * @param proc processor to actually add the connections
4609  * @param list the peer list to use
4610  */
4611 void
4612 add_closest (struct GNUNET_TESTING_PeerGroup *pg, unsigned int num,
4613     GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
4614   {
4615 #if OLD
4616
4617 #else
4618     struct FindClosestContext closest_ctx;
4619 #endif
4620     uint32_t pg_iter;
4621     uint32_t i;
4622
4623     for (i = 0; i < num; i++) /* Each time find a closest peer (from those available) */
4624       {
4625         for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4626           {
4627             closest_ctx.curr_peer = &pg->peers[pg_iter];
4628             closest_ctx.closest = NULL;
4629             closest_ctx.closest_dist = 0;
4630             closest_ctx.closest_num = 0;
4631             GNUNET_CONTAINER_multihashmap_iterate (pg->
4632                 peers[pg_iter].allowed_peers,
4633                 &find_closest_peers,
4634                 &closest_ctx);
4635             if (closest_ctx.closest != NULL)
4636               {
4637                 GNUNET_assert (closest_ctx.closest_num < pg->total);
4638                 proc (pg, pg_iter, closest_ctx.closest_num, list);
4639               }
4640           }
4641       }
4642   }
4643 #endif
4644
4645 /**
4646  * From the set of connections possible, choose at least num connections per
4647  * peer based on depth first traversal of peer connections.  If DFS leaves
4648  * peers unconnected, ensure those peers get connections.
4649  *
4650  * @param pg the peergroup we are dealing with
4651  * @param num how many connections at least should each peer have (if possible)?
4652  */
4653 void
4654 perform_dfs(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4655 {
4656   uint32_t pg_iter;
4657   uint32_t dfs_count;
4658   uint32_t starting_peer;
4659   uint32_t least_connections;
4660   uint32_t random_connection;
4661 #if OLD
4662   unsigned int temp_count;
4663   struct PeerConnection *peer_iter;
4664 #else
4665   struct DFSContext dfs_ctx;
4666   GNUNET_HashCode second_hash;
4667 #endif
4668
4669 #if OLD
4670   starting_peer = 0;
4671   dfs_count = 0;
4672   while ((count_workingset_connections (pg) < num * pg->total)
4673       && (count_allowed_connections (pg) > 0))
4674     {
4675       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4676         {
4677           least_connections = -1; /* Set to very high number */
4678           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4679             {
4680               temp_count
4681                   = count_connections (
4682                                        pg->peers[pg_iter].connect_peers_working_set_head);
4683               if (temp_count < least_connections)
4684                 {
4685                   starting_peer = pg_iter;
4686                   least_connections = temp_count;
4687                 }
4688             }
4689         }
4690
4691       temp_count
4692           = count_connections (pg->peers[starting_peer].connect_peers_head);
4693       if (temp_count == 0)
4694         continue; /* FIXME: infinite loop? */
4695
4696       random_connection = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4697                                                     temp_count);
4698       temp_count = 0;
4699       peer_iter = pg->peers[starting_peer].connect_peers_head;
4700       while (temp_count < random_connection)
4701         {
4702           peer_iter = peer_iter->next;
4703           temp_count++;
4704         }
4705       GNUNET_assert(peer_iter != NULL);
4706       add_connections (pg, starting_peer, peer_iter->index, WORKING_SET,
4707                        GNUNET_NO);
4708       remove_connections (pg, starting_peer, peer_iter->index, CONNECT,
4709                           GNUNET_YES);
4710       starting_peer = peer_iter->index;
4711       dfs_count++;
4712     }
4713
4714 #else
4715   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4716     {
4717       pg->peers[pg_iter].connect_peers_working_set =
4718       GNUNET_CONTAINER_multihashmap_create (num);
4719     }
4720
4721   starting_peer = 0;
4722   dfs_count = 0;
4723   while ((count_workingset_connections (pg) < num * pg->total)
4724       && (count_allowed_connections (pg) > 0))
4725     {
4726       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4727         {
4728           least_connections = -1; /* Set to very high number */
4729           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4730             {
4731               if (GNUNET_CONTAINER_multihashmap_size
4732                   (pg->peers[pg_iter].connect_peers_working_set) <
4733                   least_connections)
4734                 {
4735                   starting_peer = pg_iter;
4736                   least_connections =
4737                   GNUNET_CONTAINER_multihashmap_size (pg->
4738                       peers
4739                       [pg_iter].connect_peers_working_set);
4740                 }
4741             }
4742         }
4743
4744       if (GNUNET_CONTAINER_multihashmap_size (pg->peers[starting_peer].connect_peers) == 0) /* Ensure there is at least one peer left to connect! */
4745         {
4746           dfs_count = 0;
4747           continue;
4748         }
4749
4750       /* Choose a random peer from the chosen peers set of connections to add */
4751       dfs_ctx.chosen =
4752       GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4753           GNUNET_CONTAINER_multihashmap_size
4754           (pg->peers[starting_peer].connect_peers));
4755       dfs_ctx.first_uid = starting_peer;
4756       dfs_ctx.first = &pg->peers[starting_peer];
4757       dfs_ctx.pg = pg;
4758       dfs_ctx.current = 0;
4759
4760       GNUNET_CONTAINER_multihashmap_iterate (pg->
4761           peers
4762           [starting_peer].connect_peers,
4763           &dfs_connect_iterator, &dfs_ctx);
4764       /* Remove the second from the first, since we will be continuing the search and may encounter the first peer again! */
4765       hash_from_uid (dfs_ctx.second_uid, &second_hash);
4766       GNUNET_assert (GNUNET_YES ==
4767           GNUNET_CONTAINER_multihashmap_remove (pg->peers
4768               [starting_peer].connect_peers,
4769               &second_hash,
4770               pg->
4771               peers
4772               [dfs_ctx.second_uid].daemon));
4773       starting_peer = dfs_ctx.second_uid;
4774     }
4775
4776   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4777     {
4778       /* Remove the "old" connections */
4779       GNUNET_CONTAINER_multihashmap_destroy (pg->
4780           peers[pg_iter].connect_peers);
4781       /* And replace with the working set */
4782       pg->peers[pg_iter].connect_peers =
4783       pg->peers[pg_iter].connect_peers_working_set;
4784     }
4785 #endif
4786 }
4787
4788 /**
4789  * Internal callback for topology information for a particular peer.
4790  */
4791 static void
4792 internal_topology_callback(void *cls, const struct GNUNET_PeerIdentity *peer,
4793                            const struct GNUNET_TRANSPORT_ATS_Information *atsi)
4794 {
4795   struct CoreContext *core_ctx = cls;
4796   struct TopologyIterateContext *iter_ctx = core_ctx->iter_context;
4797
4798   if (peer == NULL) /* Either finished, or something went wrong */
4799     {
4800       iter_ctx->completed++;
4801       iter_ctx->connected--;
4802       /* One core context allocated per iteration, must free! */
4803       GNUNET_free (core_ctx);
4804     }
4805   else
4806     {
4807       iter_ctx->topology_cb (iter_ctx->cls, &core_ctx->daemon->id, peer, NULL);
4808     }
4809
4810   if (iter_ctx->completed == iter_ctx->total)
4811     {
4812       iter_ctx->topology_cb (iter_ctx->cls, NULL, NULL, NULL);
4813       /* Once all are done, free the iteration context */
4814       GNUNET_free (iter_ctx);
4815     }
4816 }
4817
4818 /**
4819  * Check running topology iteration tasks, if below max start a new one, otherwise
4820  * schedule for some time in the future.
4821  */
4822 static void
4823 schedule_get_topology(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4824 {
4825   struct CoreContext *core_context = cls;
4826   struct TopologyIterateContext *topology_context =
4827       (struct TopologyIterateContext *) core_context->iter_context;
4828   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4829     return;
4830
4831   if (topology_context->connected
4832       > topology_context->pg->max_outstanding_connections)
4833     {
4834 #if VERBOSE_TESTING > 2
4835       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4836           _
4837           ("Delaying connect, we have too many outstanding connections!\n"));
4838 #endif
4839       GNUNET_SCHEDULER_add_delayed (
4840                                     GNUNET_TIME_relative_multiply (
4841                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4842                                                                    100),
4843                                     &schedule_get_topology, core_context);
4844     }
4845   else
4846     {
4847 #if VERBOSE_TESTING > 2
4848       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4849           _("Creating connection, outstanding_connections is %d\n"),
4850           outstanding_connects);
4851 #endif
4852       topology_context->connected++;
4853
4854       if (GNUNET_OK != GNUNET_CORE_iterate_peers (core_context->daemon->cfg,
4855                                                   &internal_topology_callback,
4856                                                   core_context))
4857         {
4858           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Topology iteration failed.\n");
4859           internal_topology_callback (core_context, NULL, NULL);
4860         }
4861     }
4862 }
4863
4864 /**
4865  * Iterate over all (running) peers in the peer group, retrieve
4866  * all connections that each currently has.
4867  */
4868 void
4869 GNUNET_TESTING_get_topology(struct GNUNET_TESTING_PeerGroup *pg,
4870                             GNUNET_TESTING_NotifyTopology cb, void *cls)
4871 {
4872   struct TopologyIterateContext *topology_context;
4873   struct CoreContext *core_ctx;
4874   unsigned int i;
4875   unsigned int total_count;
4876
4877   /* Allocate a single topology iteration context */
4878   topology_context = GNUNET_malloc (sizeof (struct TopologyIterateContext));
4879   topology_context->topology_cb = cb;
4880   topology_context->cls = cls;
4881   topology_context->pg = pg;
4882   total_count = 0;
4883   for (i = 0; i < pg->total; i++)
4884     {
4885       if (pg->peers[i].daemon->running == GNUNET_YES)
4886         {
4887           /* Allocate one core context per core we need to connect to */
4888           core_ctx = GNUNET_malloc (sizeof (struct CoreContext));
4889           core_ctx->daemon = pg->peers[i].daemon;
4890           /* Set back pointer to topology iteration context */
4891           core_ctx->iter_context = topology_context;
4892           GNUNET_SCHEDULER_add_now (&schedule_get_topology, core_ctx);
4893           total_count++;
4894         }
4895     }
4896   if (total_count == 0)
4897     {
4898       cb (cls, NULL, NULL, "Cannot iterate over topology, no running peers!");
4899       GNUNET_free (topology_context);
4900     }
4901   else
4902     topology_context->total = total_count;
4903   return;
4904 }
4905
4906 /**
4907  * Callback function to process statistic values.
4908  * This handler is here only really to insert a peer
4909  * identity (or daemon) so the statistics can be uniquely
4910  * tied to a single running peer.
4911  *
4912  * @param cls closure
4913  * @param subsystem name of subsystem that created the statistic
4914  * @param name the name of the datum
4915  * @param value the current value
4916  * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
4917  * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
4918  */
4919 static int
4920 internal_stats_callback(void *cls, const char *subsystem, const char *name,
4921                         uint64_t value, int is_persistent)
4922 {
4923   struct StatsCoreContext *core_context = cls;
4924   struct StatsIterateContext *stats_context =
4925       (struct StatsIterateContext *) core_context->iter_context;
4926
4927   return stats_context->proc (stats_context->cls, &core_context->daemon->id,
4928                               subsystem, name, value, is_persistent);
4929 }
4930
4931 /**
4932  * Internal continuation call for statistics iteration.
4933  *
4934  * @param cls closure, the CoreContext for this iteration
4935  * @param success whether or not the statistics iterations
4936  *        was canceled or not (we don't care)
4937  */
4938 static void
4939 internal_stats_cont(void *cls, int success)
4940 {
4941   struct StatsCoreContext *core_context = cls;
4942   struct StatsIterateContext *stats_context =
4943       (struct StatsIterateContext *) core_context->iter_context;
4944
4945   stats_context->connected--;
4946   stats_context->completed++;
4947
4948   if (stats_context->completed == stats_context->total)
4949     {
4950       stats_context->cont (stats_context->cls, GNUNET_YES);
4951       GNUNET_free (stats_context);
4952     }
4953
4954   if (core_context->stats_handle != NULL)
4955     GNUNET_STATISTICS_destroy (core_context->stats_handle, GNUNET_NO);
4956
4957   GNUNET_free (core_context);
4958 }
4959
4960 /**
4961  * Check running topology iteration tasks, if below max start a new one, otherwise
4962  * schedule for some time in the future.
4963  */
4964 static void
4965 schedule_get_statistics(void *cls,
4966                         const struct GNUNET_SCHEDULER_TaskContext *tc)
4967 {
4968   struct StatsCoreContext *core_context = cls;
4969   struct StatsIterateContext *stats_context =
4970       (struct StatsIterateContext *) core_context->iter_context;
4971
4972   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4973     return;
4974
4975   if (stats_context->connected > stats_context->pg->max_outstanding_connections)
4976     {
4977 #if VERBOSE_TESTING > 2
4978       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4979           _
4980           ("Delaying connect, we have too many outstanding connections!\n"));
4981 #endif
4982       GNUNET_SCHEDULER_add_delayed (
4983                                     GNUNET_TIME_relative_multiply (
4984                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4985                                                                    100),
4986                                     &schedule_get_statistics, core_context);
4987     }
4988   else
4989     {
4990 #if VERBOSE_TESTING > 2
4991       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4992           _("Creating connection, outstanding_connections is %d\n"),
4993           outstanding_connects);
4994 #endif
4995
4996       stats_context->connected++;
4997       core_context->stats_handle
4998           = GNUNET_STATISTICS_create ("testing", core_context->daemon->cfg);
4999       if (core_context->stats_handle == NULL)
5000         {
5001           internal_stats_cont (core_context, GNUNET_NO);
5002           return;
5003         }
5004
5005       core_context->stats_get_handle
5006           = GNUNET_STATISTICS_get (core_context->stats_handle, NULL, NULL,
5007                                    GNUNET_TIME_relative_get_forever (),
5008                                    &internal_stats_cont,
5009                                    &internal_stats_callback, core_context);
5010       if (core_context->stats_get_handle == NULL)
5011         internal_stats_cont (core_context, GNUNET_NO);
5012
5013     }
5014 }
5015
5016 struct DuplicateStats
5017 {
5018   /**
5019    * Next item in the list
5020    */
5021   struct DuplicateStats *next;
5022
5023   /**
5024    * Nasty string, concatenation of relevant information.
5025    */
5026   char *unique_string;
5027 };
5028
5029 /**
5030  * Check whether the combination of port/host/unix domain socket
5031  * already exists in the list of peers being checked for statistics.
5032  *
5033  * @param pg the peergroup in question
5034  * @param specific_peer the peer we're concerned with
5035  * @param stats_list the list to return to the caller
5036  *
5037  * @return GNUNET_YES if the statistics instance has been seen already,
5038  *         GNUNET_NO if not (and we may have added it to the list)
5039  */
5040 static int
5041 stats_check_existing(struct GNUNET_TESTING_PeerGroup *pg,
5042                      struct PeerData *specific_peer,
5043                      struct DuplicateStats **stats_list)
5044 {
5045   struct DuplicateStats *pos;
5046   char *unix_domain_socket;
5047   unsigned long long port;
5048   char *to_match;
5049   if (GNUNET_YES
5050       != GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "testing",
5051                                                "single_statistics_per_host"))
5052     return GNUNET_NO; /* Each peer has its own statistics instance, do nothing! */
5053
5054   pos = *stats_list;
5055   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (specific_peer->cfg,
5056                                                           "statistics",
5057                                                           "unixpath",
5058                                                           &unix_domain_socket))
5059     return GNUNET_NO;
5060
5061   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (specific_peer->cfg,
5062                                                           "statistics", "port",
5063                                                           &port))
5064     {
5065       GNUNET_free(unix_domain_socket);
5066       return GNUNET_NO;
5067     }
5068
5069   if (specific_peer->daemon->hostname != NULL)
5070     GNUNET_asprintf (&to_match, "%s%s%llu", specific_peer->daemon->hostname,
5071                      unix_domain_socket, port);
5072   else
5073     GNUNET_asprintf (&to_match, "%s%llu", unix_domain_socket, port);
5074
5075   while (pos != NULL)
5076     {
5077       if (0 == strcmp (to_match, pos->unique_string))
5078         {
5079           GNUNET_free (unix_domain_socket);
5080           GNUNET_free (to_match);
5081           return GNUNET_YES;
5082         }
5083       pos = pos->next;
5084     }
5085   pos = GNUNET_malloc (sizeof (struct DuplicateStats));
5086   pos->unique_string = to_match;
5087   pos->next = *stats_list;
5088   *stats_list = pos;
5089   GNUNET_free (unix_domain_socket);
5090   return GNUNET_NO;
5091 }
5092
5093 /**
5094  * Iterate over all (running) peers in the peer group, retrieve
5095  * all statistics from each.
5096  */
5097 void
5098 GNUNET_TESTING_get_statistics(struct GNUNET_TESTING_PeerGroup *pg,
5099                               GNUNET_STATISTICS_Callback cont,
5100                               GNUNET_TESTING_STATISTICS_Iterator proc,
5101                               void *cls)
5102 {
5103   struct StatsIterateContext *stats_context;
5104   struct StatsCoreContext *core_ctx;
5105   unsigned int i;
5106   unsigned int total_count;
5107   struct DuplicateStats *stats_list;
5108   struct DuplicateStats *pos;
5109   stats_list = NULL;
5110
5111   /* Allocate a single stats iteration context */
5112   stats_context = GNUNET_malloc (sizeof (struct StatsIterateContext));
5113   stats_context->cont = cont;
5114   stats_context->proc = proc;
5115   stats_context->cls = cls;
5116   stats_context->pg = pg;
5117   total_count = 0;
5118
5119   for (i = 0; i < pg->total; i++)
5120     {
5121       if ((pg->peers[i].daemon->running == GNUNET_YES) && (GNUNET_NO
5122           == stats_check_existing (pg, &pg->peers[i], &stats_list)))
5123         {
5124           /* Allocate one core context per core we need to connect to */
5125           core_ctx = GNUNET_malloc (sizeof (struct StatsCoreContext));
5126           core_ctx->daemon = pg->peers[i].daemon;
5127           /* Set back pointer to topology iteration context */
5128           core_ctx->iter_context = stats_context;
5129           GNUNET_SCHEDULER_add_now (&schedule_get_statistics, core_ctx);
5130           total_count++;
5131         }
5132     }
5133
5134   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5135               "Retrieving stats from %u total instances.\n", total_count);
5136   stats_context->total = total_count;
5137   if (stats_list != NULL)
5138     {
5139       pos = stats_list;
5140       while (pos != NULL)
5141         {
5142           GNUNET_free (pos->unique_string);
5143           stats_list = pos->next;
5144           GNUNET_free (pos);
5145           pos = stats_list->next;
5146         }
5147     }
5148   return;
5149 }
5150
5151 /**
5152  * Stop the connection process temporarily.
5153  *
5154  * @param pg the peer group to stop connecting
5155  */
5156 void
5157 GNUNET_TESTING_stop_connections(struct GNUNET_TESTING_PeerGroup *pg)
5158 {
5159   pg->stop_connects = GNUNET_YES;
5160 }
5161
5162 /**
5163  * Resume the connection process temporarily.
5164  *
5165  * @param pg the peer group to resume connecting
5166  */
5167 void
5168 GNUNET_TESTING_resume_connections(struct GNUNET_TESTING_PeerGroup *pg)
5169 {
5170   pg->stop_connects = GNUNET_NO;
5171 }
5172
5173 /**
5174  * There are many ways to connect peers that are supported by this function.
5175  * To connect peers in the same topology that was created via the
5176  * GNUNET_TESTING_create_topology, the topology variable must be set to
5177  * GNUNET_TESTING_TOPOLOGY_NONE.  If the topology variable is specified,
5178  * a new instance of that topology will be generated and attempted to be
5179  * connected.  This could result in some connections being impossible,
5180  * because some topologies are non-deterministic.
5181  *
5182  * @param pg the peer group struct representing the running peers
5183  * @param topology which topology to connect the peers in
5184  * @param options options for connecting the topology
5185  * @param option_modifier modifier for options that take a parameter
5186  * @param connect_timeout how long to wait before giving up on connecting
5187  *                        two peers
5188  * @param connect_attempts how many times to attempt to connect two peers
5189  *                         over the connect_timeout duration
5190  * @param notify_callback notification to be called once all connections completed
5191  * @param notify_cls closure for notification callback
5192  *
5193  * @return the number of connections that will be attempted, GNUNET_SYSERR on error
5194  */
5195 int
5196 GNUNET_TESTING_connect_topology(
5197                                 struct GNUNET_TESTING_PeerGroup *pg,
5198                                 enum GNUNET_TESTING_Topology topology,
5199                                 enum GNUNET_TESTING_TopologyOption options,
5200                                 double option_modifier,
5201                                 struct GNUNET_TIME_Relative connect_timeout,
5202                                 unsigned int connect_attempts,
5203                                 GNUNET_TESTING_NotifyCompletion notify_callback,
5204                                 void *notify_cls)
5205 {
5206   switch (topology)
5207     {
5208   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
5209 #if VERBOSE_TOPOLOGY
5210     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5211                 _("Creating clique CONNECT topology\n"));
5212 #endif
5213     create_clique (pg, &add_connections, CONNECT, GNUNET_NO);
5214     break;
5215   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
5216 #if VERBOSE_TOPOLOGY
5217     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5218                 _("Creating small world (ring) CONNECT topology\n"));
5219 #endif
5220     create_small_world_ring (pg, &add_connections, CONNECT);
5221     break;
5222   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
5223 #if VERBOSE_TOPOLOGY
5224     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5225                 _("Creating small world (2d-torus) CONNECT topology\n"));
5226 #endif
5227     create_small_world (pg, &add_connections, CONNECT);
5228     break;
5229   case GNUNET_TESTING_TOPOLOGY_RING:
5230 #if VERBOSE_TOPOLOGY
5231     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring CONNECT topology\n"));
5232 #endif
5233     create_ring (pg, &add_connections, CONNECT);
5234     break;
5235   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
5236 #if VERBOSE_TOPOLOGY
5237     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5238                 _("Creating 2d torus CONNECT topology\n"));
5239 #endif
5240     create_2d_torus (pg, &add_connections, CONNECT);
5241     break;
5242   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
5243 #if VERBOSE_TOPOLOGY
5244     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5245                 _("Creating Erdos-Renyi CONNECT topology\n"));
5246 #endif
5247     create_erdos_renyi (pg, &add_connections, CONNECT);
5248     break;
5249   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
5250 #if VERBOSE_TOPOLOGY
5251     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5252                 _("Creating InterNAT CONNECT topology\n"));
5253 #endif
5254     create_nated_internet (pg, &add_connections, CONNECT);
5255     break;
5256   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
5257 #if VERBOSE_TOPOLOGY
5258     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5259                 _("Creating Scale Free CONNECT topology\n"));
5260 #endif
5261     create_scale_free (pg, &add_connections, CONNECT);
5262     break;
5263   case GNUNET_TESTING_TOPOLOGY_LINE:
5264 #if VERBOSE_TOPOLOGY
5265     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5266                 _("Creating straight line CONNECT topology\n"));
5267 #endif
5268     create_line (pg, &add_connections, CONNECT);
5269     break;
5270   case GNUNET_TESTING_TOPOLOGY_NONE:
5271 #if VERBOSE_TOPOLOGY
5272     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating no CONNECT topology\n"));
5273 #endif
5274     copy_allowed_topology (pg);
5275     break;
5276   default:
5277     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5278     ("Unknown topology specification, can't connect peers!\n"));
5279     return GNUNET_SYSERR;
5280     }
5281
5282   switch (options)
5283     {
5284   case GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM:
5285 #if VERBOSE_TOPOLOGY
5286     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5287     ("Connecting random subset (%'.2f percent) of possible peers\n"), 100
5288         * option_modifier);
5289 #endif
5290     choose_random_connections (pg, option_modifier);
5291     break;
5292   case GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM:
5293 #if VERBOSE_TOPOLOGY
5294     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5295                 _("Connecting a minimum of %u peers each (if possible)\n"),
5296                 (unsigned int) option_modifier);
5297 #endif
5298     choose_minimum (pg, (unsigned int) option_modifier);
5299     break;
5300   case GNUNET_TESTING_TOPOLOGY_OPTION_DFS:
5301 #if VERBOSE_TOPOLOGY
5302     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5303     ("Using DFS to connect a minimum of %u peers each (if possible)\n"),
5304                 (unsigned int) option_modifier);
5305 #endif
5306 #if FIXME
5307     perform_dfs (pg, (int) option_modifier);
5308 #endif
5309     break;
5310   case GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST:
5311 #if VERBOSE_TOPOLOGY
5312     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5313     ("Finding additional %u closest peers each (if possible)\n"),
5314                 (unsigned int) option_modifier);
5315 #endif
5316 #if FIXME
5317     add_closest (pg, (unsigned int) option_modifier,
5318         &add_connections, CONNECT);
5319 #endif
5320     break;
5321   case GNUNET_TESTING_TOPOLOGY_OPTION_NONE:
5322     break;
5323   case GNUNET_TESTING_TOPOLOGY_OPTION_ALL:
5324     break;
5325   default:
5326     break;
5327     }
5328
5329   return connect_topology (pg, connect_timeout, connect_attempts,
5330                            notify_callback, notify_cls);
5331 }
5332
5333 /**
5334  * Lookup and return the number of SSH connections to a host.
5335  *
5336  * @param hostname the hostname to lookup in the list
5337  * @param pg the peergroup that the host belongs to
5338  *
5339  * @return the number of current ssh connections to the host
5340  */
5341 static unsigned int
5342 count_outstanding_at_host(const char *hostname,
5343                           struct GNUNET_TESTING_PeerGroup *pg)
5344 {
5345   struct OutstandingSSH *pos;
5346   pos = pg->ssh_head;
5347   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5348     pos = pos->next;
5349   GNUNET_assert(pos != NULL);
5350   return pos->outstanding;
5351 }
5352
5353 /**
5354  * Increment the number of SSH connections to a host by one.
5355  *
5356  * @param hostname the hostname to lookup in the list
5357  * @param pg the peergroup that the host belongs to
5358  *
5359  */
5360 static void
5361 increment_outstanding_at_host(const char *hostname,
5362                               struct GNUNET_TESTING_PeerGroup *pg)
5363 {
5364   struct OutstandingSSH *pos;
5365   pos = pg->ssh_head;
5366   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5367     pos = pos->next;
5368   GNUNET_assert(pos != NULL);
5369   pos->outstanding++;
5370 }
5371
5372 /**
5373  * Decrement the number of SSH connections to a host by one.
5374  *
5375  * @param hostname the hostname to lookup in the list
5376  * @param pg the peergroup that the host belongs to
5377  *
5378  */
5379 static void
5380 decrement_outstanding_at_host(const char *hostname,
5381                               struct GNUNET_TESTING_PeerGroup *pg)
5382 {
5383   struct OutstandingSSH *pos;
5384   pos = pg->ssh_head;
5385   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5386     pos = pos->next;
5387   GNUNET_assert(pos != NULL);
5388   pos->outstanding--;
5389 }
5390
5391 /**
5392  * Callback that is called whenever a hostkey is generated
5393  * for a peer.  Call the real callback and decrement the
5394  * starting counter for the peergroup.
5395  *
5396  * @param cls closure
5397  * @param id identifier for the daemon, NULL on error
5398  * @param d handle for the daemon
5399  * @param emsg error message (NULL on success)
5400  */
5401 static void
5402 internal_hostkey_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5403                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5404 {
5405   struct InternalStartContext *internal_context = cls;
5406   internal_context->peer->pg->starting--;
5407   internal_context->peer->pg->started++;
5408   if (internal_context->hostname != NULL)
5409     decrement_outstanding_at_host (internal_context->hostname,
5410                                    internal_context->peer->pg);
5411   if (internal_context->hostkey_callback != NULL)
5412     internal_context->hostkey_callback (internal_context->hostkey_cls, id, d,
5413                                         emsg);
5414   else if (internal_context->peer->pg->started
5415       == internal_context->peer->pg->total)
5416     {
5417       internal_context->peer->pg->started = 0; /* Internal startup may use this counter! */
5418       GNUNET_TESTING_daemons_continue_startup (internal_context->peer->pg);
5419     }
5420 }
5421
5422 /**
5423  * Callback that is called whenever a peer has finished starting.
5424  * Call the real callback and decrement the starting counter
5425  * for the peergroup.
5426  *
5427  * @param cls closure
5428  * @param id identifier for the daemon, NULL on error
5429  * @param cfg config
5430  * @param d handle for the daemon
5431  * @param emsg error message (NULL on success)
5432  */
5433 static void
5434 internal_startup_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5435                           const struct GNUNET_CONFIGURATION_Handle *cfg,
5436                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5437 {
5438   struct InternalStartContext *internal_context = cls;
5439   internal_context->peer->pg->starting--;
5440   if (internal_context->hostname != NULL)
5441     decrement_outstanding_at_host (internal_context->hostname,
5442                                    internal_context->peer->pg);
5443   if (internal_context->start_cb != NULL)
5444     internal_context->start_cb (internal_context->start_cb_cls, id, cfg, d,
5445                                 emsg);
5446 }
5447
5448 static void
5449 internal_continue_startup(void *cls,
5450                           const struct GNUNET_SCHEDULER_TaskContext *tc)
5451 {
5452   struct InternalStartContext *internal_context = cls;
5453
5454   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5455     {
5456       return;
5457     }
5458
5459   if ((internal_context->peer->pg->starting
5460       < internal_context->peer->pg->max_concurrent_ssh)
5461       || ((internal_context->hostname != NULL)
5462           && (count_outstanding_at_host (internal_context->hostname,
5463                                          internal_context->peer->pg)
5464               < internal_context->peer->pg->max_concurrent_ssh)))
5465     {
5466       if (internal_context->hostname != NULL)
5467         increment_outstanding_at_host (internal_context->hostname,
5468                                        internal_context->peer->pg);
5469       internal_context->peer->pg->starting++;
5470       GNUNET_TESTING_daemon_continue_startup (internal_context->peer->daemon);
5471     }
5472   else
5473     {
5474       GNUNET_SCHEDULER_add_delayed (
5475                                     GNUNET_TIME_relative_multiply (
5476                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5477                                                                    100),
5478                                     &internal_continue_startup,
5479                                     internal_context);
5480     }
5481 }
5482
5483 /**
5484  * Callback for informing us about a successful
5485  * or unsuccessful churn start call.
5486  *
5487  * @param cls a ChurnContext
5488  * @param id the peer identity of the started peer
5489  * @param cfg the handle to the configuration of the peer
5490  * @param d handle to the daemon for the peer
5491  * @param emsg NULL on success, non-NULL on failure
5492  *
5493  */
5494 void
5495 churn_start_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5496                      const struct GNUNET_CONFIGURATION_Handle *cfg,
5497                      struct GNUNET_TESTING_Daemon *d, const char *emsg)
5498 {
5499   struct ChurnRestartContext *startup_ctx = cls;
5500   struct ChurnContext *churn_ctx = startup_ctx->churn_ctx;
5501
5502   unsigned int total_left;
5503   char *error_message;
5504
5505   error_message = NULL;
5506   if (emsg != NULL)
5507     {
5508       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5509                   "Churn stop callback failed with error `%s'\n", emsg);
5510       churn_ctx->num_failed_start++;
5511     }
5512   else
5513     {
5514       churn_ctx->num_to_start--;
5515     }
5516
5517 #if DEBUG_CHURN
5518   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5519       "Started peer, %d left.\n", churn_ctx->num_to_start);
5520 #endif
5521
5522   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
5523       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
5524
5525   if (total_left == 0)
5526     {
5527       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
5528         GNUNET_asprintf (
5529                          &error_message,
5530                          "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
5531                          churn_ctx->num_failed_start,
5532                          churn_ctx->num_failed_stop);
5533       churn_ctx->cb (churn_ctx->cb_cls, error_message);
5534       GNUNET_free_non_null (error_message);
5535       GNUNET_free (churn_ctx);
5536       GNUNET_free (startup_ctx);
5537     }
5538 }
5539
5540 static void
5541 schedule_churn_restart(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5542 {
5543   struct PeerRestartContext *peer_restart_ctx = cls;
5544   struct ChurnRestartContext *startup_ctx = peer_restart_ctx->churn_restart_ctx;
5545
5546   if (startup_ctx->outstanding > startup_ctx->pg->max_concurrent_ssh)
5547     GNUNET_SCHEDULER_add_delayed (
5548                                   GNUNET_TIME_relative_multiply (
5549                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
5550                                                                  100),
5551                                   &schedule_churn_restart, peer_restart_ctx);
5552   else
5553     {
5554       GNUNET_TESTING_daemon_start_stopped (peer_restart_ctx->daemon,
5555                                            startup_ctx->timeout,
5556                                            &churn_start_callback, startup_ctx);
5557       GNUNET_free (peer_restart_ctx);
5558     }
5559 }
5560
5561
5562 static void
5563 internal_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5564 {
5565   struct InternalStartContext *internal_context = cls;
5566
5567   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5568     {
5569       return;
5570     }
5571
5572   if ((internal_context->peer->pg->starting
5573       < internal_context->peer->pg->max_concurrent_ssh)
5574       || ((internal_context->hostname != NULL)
5575           && (count_outstanding_at_host (internal_context->hostname,
5576                                          internal_context->peer->pg)
5577               < internal_context->peer->pg->max_concurrent_ssh)))
5578     {
5579       if (internal_context->hostname != NULL)
5580         increment_outstanding_at_host (internal_context->hostname,
5581                                        internal_context->peer->pg);
5582       internal_context->peer->pg->starting++;
5583       internal_context->peer->daemon
5584           = GNUNET_TESTING_daemon_start (internal_context->peer->cfg,
5585                                          internal_context->timeout,
5586                                          GNUNET_NO,
5587                                          internal_context->hostname,
5588                                          internal_context->username,
5589                                          internal_context->sshport,
5590                                          internal_context->hostkey,
5591                                          &internal_hostkey_callback,
5592                                          internal_context,
5593                                          &internal_startup_callback,
5594                                          internal_context);
5595     }
5596   else
5597     {
5598       GNUNET_SCHEDULER_add_delayed (
5599                                     GNUNET_TIME_relative_multiply (
5600                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5601                                                                    100),
5602                                     &internal_start, internal_context);
5603     }
5604 }
5605 #if USE_START_HELPER
5606
5607 struct PeerStartHelperContext
5608 {
5609   struct GNUNET_TESTING_PeerGroup *pg;
5610
5611   struct HostData *host;
5612
5613   struct GNUNET_OS_Process *proc;
5614 };
5615
5616 static void
5617 check_peers_started (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5618 {
5619   struct PeerStartHelperContext *helper = cls;
5620   enum GNUNET_OS_ProcessStatusType type;
5621   unsigned long code;
5622   unsigned int i;
5623   GNUNET_TESTING_NotifyDaemonRunning cb;
5624
5625   if (GNUNET_NO == GNUNET_OS_process_status (helper->proc, &type, &code)) /* Still running, wait some more! */
5626   {
5627     GNUNET_SCHEDULER_add_delayed(GNUNET_CONSTANTS_EXEC_WAIT, &check_peers_started, helper);
5628     return;
5629   }
5630
5631   helper->pg->starting--;
5632   if (helper->pg->starting == 0) /* All peers have finished starting! */
5633     {
5634       /* Call the peer started callback for each peer, set proper FSM state (?) */
5635       for (i = 0; i < helper->pg->total; i++)
5636         {
5637           cb = helper->pg->peers[i].daemon->cb;
5638           helper->pg->peers[i].daemon->cb = NULL;
5639           helper->pg->peers[i].daemon->running = GNUNET_YES;
5640           helper->pg->peers[i].daemon->phase = SP_START_DONE;
5641           if (NULL != cb)
5642           {
5643             if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
5644               cb (helper->pg->peers[i].daemon->cb_cls,
5645                   &helper->pg->peers[i].daemon->id,
5646                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5647                   "Failed to execute peerStartHelper.pl, or return code bad!");
5648             else
5649               cb (helper->pg->peers[i].daemon->cb_cls,
5650                   &helper->pg->peers[i].daemon->id,
5651                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5652                   NULL);
5653
5654           }
5655
5656         }
5657     }
5658   GNUNET_OS_process_close(helper->proc);
5659 }
5660
5661 static void
5662 start_peer_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5663 {
5664   struct PeerStartHelperContext *helper = cls;
5665   char *baseservicehome;
5666   char *tempdir;
5667   char *arg;
5668   /* ssh user@host peerStartHelper /path/to/basedirectory */
5669   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (helper->pg->cfg, "PATHS", "SERVICEHOME",
5670                                                                     &baseservicehome));
5671   GNUNET_asprintf(&tempdir, "%s/%s/", baseservicehome, helper->host->hostname);
5672   if (NULL != helper->host->username)
5673     GNUNET_asprintf (&arg, "%s@%s", helper->host->username, helper->host->hostname);
5674   else
5675     GNUNET_asprintf (&arg, "%s", helper->host->hostname);
5676
5677   /* FIXME: Doesn't support ssh_port option! */
5678   helper->proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5679                                   "peerStartHelper.pl", tempdir,  NULL);
5680   GNUNET_assert(helper->proc != NULL);
5681   GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "starting peers with cmd ssh %s %s %s\n", arg, "peerStartHelper.pl", tempdir);
5682   GNUNET_SCHEDULER_add_now (&check_peers_started, helper);
5683   GNUNET_free (tempdir);
5684   GNUNET_free (baseservicehome);
5685   GNUNET_free (arg);
5686 }
5687 #endif
5688
5689 /**
5690  * Function which continues a peer group starting up
5691  * after successfully generating hostkeys for each peer.
5692  *
5693  * @param pg the peer group to continue starting
5694  *
5695  */
5696 void
5697 GNUNET_TESTING_daemons_continue_startup(struct GNUNET_TESTING_PeerGroup *pg)
5698 {
5699   unsigned int i;
5700
5701 #if USE_START_HELPER
5702   if ((pg->num_hosts > 0) && (pg->hostkey_data != NULL))
5703     {
5704       struct PeerStartHelperContext *helper;
5705       pg->starting = pg->num_hosts;
5706       for (i = 0; i < pg->num_hosts; i++)
5707         {
5708           helper = GNUNET_malloc(sizeof(struct PeerStartHelperContext));
5709           helper->pg = pg;
5710           helper->host = &pg->hosts[i];
5711           GNUNET_SCHEDULER_add_now(&start_peer_helper, helper);
5712         }
5713     }
5714   else
5715     {
5716       pg->starting = 0;
5717       for (i = 0; i < pg->total; i++)
5718         {
5719           GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5720                                     &pg->peers[i].internal_context);
5721         }
5722     }
5723 #else
5724   pg->starting = 0;
5725   for (i = 0; i < pg->total; i++)
5726     {
5727       GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5728                                 &pg->peers[i].internal_context);
5729     }
5730 #endif
5731 }
5732
5733 #if USE_START_HELPER
5734 static void
5735 call_hostkey_callbacks (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5736 {
5737   struct GNUNET_TESTING_PeerGroup *pg = cls;
5738   unsigned int i;
5739   for (i = 0; i < pg->total; i++)
5740     {
5741       if (pg->peers[i].internal_context.hostkey_callback != NULL)
5742         pg->peers[i].internal_context.hostkey_callback (pg->peers[i].internal_context.hostkey_cls,
5743                                                            &pg->peers[i].daemon->id,
5744                                                            pg->peers[i].daemon,
5745                                                            NULL);
5746     }
5747
5748   if (pg->peers[0].internal_context.hostkey_callback == NULL)
5749     GNUNET_TESTING_daemons_continue_startup (pg);
5750 }
5751 #endif
5752
5753 /**
5754  * Start count gnunet instances with the same set of transports and
5755  * applications.  The port numbers (any option called "PORT") will be
5756  * adjusted to ensure that no two peers running on the same system
5757  * have the same port(s) in their respective configurations.
5758  *
5759  * @param cfg configuration template to use
5760  * @param total number of daemons to start
5761  * @param max_concurrent_connections for testing, how many peers can
5762  *                                   we connect to simultaneously
5763  * @param max_concurrent_ssh when starting with ssh, how many ssh
5764  *        connections will we allow at once (based on remote hosts allowed!)
5765  * @param timeout total time allowed for peers to start
5766  * @param hostkey_callback function to call on each peers hostkey generation
5767  *        if NULL, peers will be started by this call, if non-null,
5768  *        GNUNET_TESTING_daemons_continue_startup must be called after
5769  *        successful hostkey generation
5770  * @param hostkey_cls closure for hostkey callback
5771  * @param cb function to call on each daemon that was started
5772  * @param cb_cls closure for cb
5773  * @param connect_callback function to call each time two hosts are connected
5774  * @param connect_callback_cls closure for connect_callback
5775  * @param hostnames linked list of host structs to use to start peers on
5776  *                  (NULL to run on localhost only)
5777  *
5778  * @return NULL on error, otherwise handle to control peer group
5779  */
5780 struct GNUNET_TESTING_PeerGroup *
5781 GNUNET_TESTING_daemons_start(const struct GNUNET_CONFIGURATION_Handle *cfg,
5782                              unsigned int total,
5783                              unsigned int max_concurrent_connections,
5784                              unsigned int max_concurrent_ssh,
5785                              struct GNUNET_TIME_Relative timeout,
5786                              GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
5787                              void *hostkey_cls,
5788                              GNUNET_TESTING_NotifyDaemonRunning cb,
5789                              void *cb_cls,
5790                              GNUNET_TESTING_NotifyConnection connect_callback,
5791                              void *connect_callback_cls,
5792                              const struct GNUNET_TESTING_Host *hostnames)
5793 {
5794   struct GNUNET_TESTING_PeerGroup *pg;
5795   const struct GNUNET_TESTING_Host *hostpos;
5796   const char *hostname;
5797   const char *username;
5798   char *baseservicehome;
5799   char *newservicehome;
5800   char *tmpdir;
5801   char *hostkeys_file;
5802   char *arg;
5803   char *ssh_port_str;
5804   struct GNUNET_DISK_FileHandle *fd;
5805   struct GNUNET_CONFIGURATION_Handle *pcfg;
5806   unsigned int off;
5807   struct OutstandingSSH *ssh_entry;
5808   unsigned int hostcnt;
5809   unsigned int i;
5810   uint16_t minport;
5811   uint16_t sshport;
5812   uint32_t upnum;
5813   uint32_t fdnum;
5814   uint64_t fs;
5815   uint64_t total_hostkeys;
5816   struct GNUNET_OS_Process *proc;
5817
5818   username = NULL;
5819   if (0 == total)
5820     {
5821       GNUNET_break (0);
5822       return NULL;
5823     }
5824
5825   upnum = 0;
5826   fdnum = 0;
5827   pg = GNUNET_malloc (sizeof (struct GNUNET_TESTING_PeerGroup));
5828   pg->cfg = cfg;
5829   pg->notify_connection = connect_callback;
5830   pg->notify_connection_cls = connect_callback_cls;
5831   pg->total = total;
5832   pg->max_timeout = GNUNET_TIME_relative_to_absolute (timeout);
5833   pg->peers = GNUNET_malloc (total * sizeof (struct PeerData));
5834   pg->max_outstanding_connections = max_concurrent_connections;
5835   pg->max_concurrent_ssh = max_concurrent_ssh;
5836   if (NULL != hostnames)
5837     {
5838       off = 0;
5839       hostpos = hostnames;
5840       while (hostpos != NULL)
5841         {
5842           hostpos = hostpos->next;
5843           off++;
5844         }
5845       pg->hosts = GNUNET_malloc (off * sizeof (struct HostData));
5846       off = 0;
5847
5848       hostpos = hostnames;
5849       while (hostpos != NULL)
5850         {
5851           pg->hosts[off].minport = LOW_PORT;
5852           pg->hosts[off].hostname = GNUNET_strdup (hostpos->hostname);
5853           if (hostpos->username != NULL)
5854             pg->hosts[off].username = GNUNET_strdup (hostpos->username);
5855           pg->hosts[off].sshport = hostpos->port;
5856           hostpos = hostpos->next;
5857           off++;
5858         }
5859
5860       if (off == 0)
5861         {
5862           pg->hosts = NULL;
5863         }
5864       hostcnt = off;
5865       minport = 0;
5866       pg->num_hosts = off;
5867     }
5868   else
5869     {
5870       hostcnt = 0;
5871       minport = LOW_PORT;
5872     }
5873
5874   /* Create the servicehome directory for each remote peer */
5875   GNUNET_assert(GNUNET_OK ==
5876                 GNUNET_CONFIGURATION_get_value_string (cfg, "PATHS", "SERVICEHOME",
5877                                                        &baseservicehome));
5878   for (i = 0; i < pg->num_hosts; i++)
5879     {
5880       ssh_entry = GNUNET_malloc(sizeof(struct OutstandingSSH));
5881       ssh_entry->hostname = pg->hosts[i].hostname; /* Don't free! */
5882       GNUNET_CONTAINER_DLL_insert(pg->ssh_head, pg->ssh_tail, ssh_entry);
5883       GNUNET_asprintf(&tmpdir, "%s/%s", baseservicehome, pg->hosts[i].hostname);
5884       if (NULL != pg->hosts[i].username)
5885         GNUNET_asprintf (&arg, "%s@%s", pg->hosts[i].username,
5886                          pg->hosts[i].hostname);
5887       else
5888         GNUNET_asprintf (&arg, "%s", pg->hosts[i].hostname);
5889       if (pg->hosts[i].sshport != 0)
5890         {
5891           GNUNET_asprintf (&ssh_port_str, "%d", pg->hosts[i].sshport);
5892           proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", "-P",
5893                                           ssh_port_str,
5894 #if !DEBUG_TESTING
5895                                           "-q",
5896 #endif
5897                                           arg, "mkdir -p", tmpdir,
5898                                           NULL);
5899         }
5900       else
5901         proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5902                                         "mkdir -p", tmpdir, NULL);
5903       GNUNET_assert(proc != NULL);
5904       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5905                   "Creating remote dir with command ssh %s %s %s\n", arg,
5906                   " mkdir -p ", tmpdir);
5907       GNUNET_free(tmpdir);
5908       GNUNET_free(arg);
5909       GNUNET_OS_process_wait (proc);
5910       GNUNET_OS_process_close(proc);
5911     }
5912   GNUNET_free(baseservicehome);
5913   baseservicehome = NULL;
5914
5915   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (cfg, "TESTING",
5916                                                            "HOSTKEYSFILE",
5917                                                            &hostkeys_file))
5918     {
5919       if (GNUNET_YES != GNUNET_DISK_file_test (hostkeys_file))
5920         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5921                     _("Could not read hostkeys file!\n"));
5922       else
5923         {
5924           /* Check hostkey file size, read entire thing into memory */
5925           fd = GNUNET_DISK_file_open (hostkeys_file,
5926                                       GNUNET_DISK_OPEN_READ,
5927                                       GNUNET_DISK_PERM_NONE);
5928           if (NULL == fd)
5929             {
5930               GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
5931                                         "open",
5932                                         hostkeys_file);
5933               GNUNET_free (hostkeys_file);
5934               for (i=0;i<pg->num_hosts;i++)
5935                 {
5936                   GNUNET_free (pg->hosts[i].hostname);
5937                   GNUNET_free_non_null (pg->hosts[i].username);
5938                 }
5939               GNUNET_free (pg->peers);
5940               GNUNET_free (pg->hosts);
5941               GNUNET_free (pg);
5942               return NULL;
5943             }
5944
5945           if (GNUNET_YES != GNUNET_DISK_file_size (hostkeys_file, &fs,
5946                                                    GNUNET_YES))
5947             fs = 0;
5948
5949           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5950                       "Found file size %llu for hostkeys, expect hostkeys to be size %d\n",
5951                       fs, HOSTKEYFILESIZE);
5952
5953           if (0 != (fs % HOSTKEYFILESIZE))
5954             {
5955               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5956                           "File size %llu seems incorrect for hostkeys...\n",
5957                           fs);
5958             }
5959           else
5960             {
5961               total_hostkeys = fs / HOSTKEYFILESIZE;
5962               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5963                           "Will read %llu hostkeys from file\n",
5964                           total_hostkeys);
5965               pg->hostkey_data = GNUNET_malloc_large (fs);
5966               GNUNET_assert (fs == GNUNET_DISK_file_read (fd, pg->hostkey_data, fs));
5967             }
5968           GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_close(fd));
5969         }
5970       GNUNET_free(hostkeys_file);
5971     }
5972
5973   for (off = 0; off < total; off++)
5974     {
5975       if (hostcnt > 0)
5976         {
5977           hostname = pg->hosts[off % hostcnt].hostname;
5978           username = pg->hosts[off % hostcnt].username;
5979           sshport = pg->hosts[off % hostcnt].sshport;
5980           pcfg = make_config (cfg, off, &pg->hosts[off % hostcnt].minport,
5981                               &upnum, hostname, &fdnum);
5982         }
5983       else
5984         {
5985           hostname = NULL;
5986           username = NULL;
5987           sshport = 0;
5988           pcfg = make_config (cfg, off, &minport, &upnum, hostname, &fdnum);
5989         }
5990
5991       if (NULL == pcfg)
5992         {
5993           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5994                       _("Could not create configuration for peer number %u on `%s'!\n"),
5995                       off,
5996                       hostname == NULL ? "localhost" : hostname);
5997           continue;
5998         }
5999
6000       if (GNUNET_YES
6001           == GNUNET_CONFIGURATION_get_value_string (pcfg, "PATHS",
6002                                                     "SERVICEHOME",
6003                                                     &baseservicehome))
6004         {
6005           if (hostname != NULL)
6006             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", baseservicehome, hostname, off);
6007           else
6008             GNUNET_asprintf (&newservicehome, "%s/%d/", baseservicehome, off);
6009           GNUNET_free (baseservicehome);
6010           baseservicehome = NULL;
6011         }
6012       else
6013         {
6014           tmpdir = getenv ("TMPDIR");
6015           tmpdir = tmpdir ? tmpdir : "/tmp";
6016           if (hostname != NULL)
6017             GNUNET_asprintf (&newservicehome, "%s/%s/%s/%d/", tmpdir, hostname,
6018                              "gnunet-testing-test-test", off);
6019           else
6020             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", tmpdir,
6021                              "gnunet-testing-test-test", off);
6022         }
6023       GNUNET_CONFIGURATION_set_value_string (pcfg, "PATHS", "SERVICEHOME",
6024                                              newservicehome);
6025       GNUNET_free (newservicehome);
6026       pg->peers[off].cfg = pcfg;
6027       pg->peers[off].pg = pg;
6028       pg->peers[off].internal_context.peer = &pg->peers[off];
6029       pg->peers[off].internal_context.timeout = timeout;
6030       pg->peers[off].internal_context.hostname = hostname;
6031       pg->peers[off].internal_context.username = username;
6032       pg->peers[off].internal_context.sshport = sshport;
6033       if (pg->hostkey_data != NULL)
6034         pg->peers[off].internal_context.hostkey = &pg->hostkey_data[off
6035             * HOSTKEYFILESIZE];
6036       pg->peers[off].internal_context.hostkey_callback = hostkey_callback;
6037       pg->peers[off].internal_context.hostkey_cls = hostkey_cls;
6038       pg->peers[off].internal_context.start_cb = cb;
6039       pg->peers[off].internal_context.start_cb_cls = cb_cls;
6040 #if !USE_START_HELPER
6041       GNUNET_SCHEDULER_add_now (&internal_start,
6042                                 &pg->peers[off].internal_context);
6043 #else
6044       if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6045         {
6046           pg->peers[off].daemon
6047             = GNUNET_TESTING_daemon_start (pcfg,
6048                                            timeout,
6049                                            GNUNET_YES,
6050                                            hostname,
6051                                            username,
6052                                            sshport,
6053                                            pg->peers[off].internal_context.hostkey,
6054                                            &internal_hostkey_callback,
6055                                            &pg->peers[off].internal_context,
6056                                            &internal_startup_callback,
6057                                            &pg->peers[off].internal_context);
6058           /**
6059            * At this point, given that we had a hostkeyfile,
6060            * we can call the hostkey callback!
6061            * But first, we should copy (rsync) all of the configs
6062            * and hostkeys to the remote peers.  Then let topology
6063            * creation happen, then call the peer start helper processes,
6064            * then set pg->whatever_phase for each peer and let them
6065            * enter the fsm to get the HELLO's for peers and start connecting.
6066            */
6067         }
6068       else
6069         {
6070           GNUNET_SCHEDULER_add_now (&internal_start,
6071                                     &pg->peers[off].internal_context);
6072         }
6073
6074 #endif
6075     }
6076
6077 #if USE_START_HELPER /* Now the peergroup has been set up, hostkeys and configs written to files. */
6078   if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6079     {
6080       for (off = 0; off < hostcnt; off++)
6081         {
6082           /* FIXME: grab baseservicehome! */
6083           GNUNET_asprintf (&newservicehome,
6084                            "%s/%s/",
6085                            baseservicehome,
6086                            pg->hosts[off].hostname);
6087
6088           if (NULL != username)
6089             GNUNET_asprintf (&arg,
6090                              "%s@%s:%s/%s",
6091                              username,
6092                              pg->hosts[off].hostname,
6093                              baseservicehome,
6094                              pg->hosts[off].hostname);
6095           else
6096             GNUNET_asprintf (&arg,
6097                              "%s:%s/%s",
6098                              pg->hosts[off].hostname,
6099                              baseservicehome,
6100                              pg->hosts[off].hostname);
6101
6102           // FIXME: free--- GNUNET_free (baseservicehome);
6103
6104           /* FIXME: Doesn't support ssh_port option! */
6105           proc = GNUNET_OS_start_process (NULL, NULL,
6106                                           "rsync",
6107                                           "rsync", "-r", newservicehome, arg, NULL);
6108
6109           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6110                       "copying directory with command rsync -r %s %s\n",
6111                       newservicehome, arg);
6112
6113           GNUNET_free (arg);
6114           if (NULL == proc)
6115             {
6116               GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6117                           _("Could not start `%s' process to copy configuration directory.\n"),
6118                           "scp");
6119               GNUNET_assert(0);
6120             }
6121           GNUNET_OS_process_wait (proc);
6122           GNUNET_OS_process_close (proc);
6123         }
6124       /* Now all the configuration files and hostkeys are copied to the remote host.  Call the hostkey callback for each peer! */
6125       GNUNET_SCHEDULER_add_now (&call_hostkey_callbacks, pg);
6126     }
6127 #endif
6128   return pg;
6129 }
6130
6131 /*
6132  * Get a daemon by number, so callers don't have to do nasty
6133  * offsetting operation.
6134  */
6135 struct GNUNET_TESTING_Daemon *
6136 GNUNET_TESTING_daemon_get(struct GNUNET_TESTING_PeerGroup *pg,
6137                           unsigned int position)
6138 {
6139   if (position < pg->total)
6140     return pg->peers[position].daemon;
6141   return NULL;
6142 }
6143
6144 /*
6145  * Get a daemon by peer identity, so callers can
6146  * retrieve the daemon without knowing it's offset.
6147  *
6148  * @param pg the peer group to retrieve the daemon from
6149  * @param peer_id the peer identity of the daemon to retrieve
6150  *
6151  * @return the daemon on success, or NULL if no such peer identity is found
6152  */
6153 struct GNUNET_TESTING_Daemon *
6154 GNUNET_TESTING_daemon_get_by_id(struct GNUNET_TESTING_PeerGroup *pg,
6155                                 struct GNUNET_PeerIdentity *peer_id)
6156 {
6157   unsigned int i;
6158
6159   for (i = 0; i < pg->total; i++)
6160     {
6161       if (0 == memcmp (&pg->peers[i].daemon->id, peer_id,
6162                        sizeof(struct GNUNET_PeerIdentity)))
6163         return pg->peers[i].daemon;
6164     }
6165   return NULL;
6166 }
6167
6168 /**
6169  * Prototype of a function that will be called when a
6170  * particular operation was completed the testing library.
6171  *
6172  * @param cls closure (a struct RestartContext)
6173  * @param id id of the peer that was restarted
6174  * @param cfg handle to the configuration of the peer
6175  * @param d handle to the daemon that was restarted
6176  * @param emsg NULL on success
6177  */
6178 static void
6179 restart_callback(void *cls, const struct GNUNET_PeerIdentity *id,
6180                  const struct GNUNET_CONFIGURATION_Handle *cfg,
6181                  struct GNUNET_TESTING_Daemon *d, const char *emsg)
6182 {
6183   struct RestartContext *restart_context = cls;
6184
6185   if (emsg == NULL)
6186     {
6187       restart_context->peers_restarted++;
6188     }
6189   else
6190     {
6191       restart_context->peers_restart_failed++;
6192     }
6193
6194   if (restart_context->peers_restarted == restart_context->peer_group->total)
6195     {
6196       restart_context->callback (restart_context->callback_cls, NULL);
6197       GNUNET_free (restart_context);
6198     }
6199   else if (restart_context->peers_restart_failed
6200       + restart_context->peers_restarted == restart_context->peer_group->total)
6201     {
6202       restart_context->callback (restart_context->callback_cls,
6203                                  "Failed to restart peers!");
6204       GNUNET_free (restart_context);
6205     }
6206
6207 }
6208
6209 /**
6210  * Callback for informing us about a successful
6211  * or unsuccessful churn stop call.
6212  *
6213  * @param cls a ChurnContext
6214  * @param emsg NULL on success, non-NULL on failure
6215  *
6216  */
6217 static void
6218 churn_stop_callback(void *cls, const char *emsg)
6219 {
6220   struct ShutdownContext *shutdown_ctx = cls;
6221   struct ChurnContext *churn_ctx = shutdown_ctx->cb_cls;
6222   unsigned int total_left;
6223   char *error_message;
6224
6225   error_message = NULL;
6226   shutdown_ctx->outstanding--;
6227
6228   if (emsg != NULL)
6229     {
6230       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6231                   "Churn stop callback failed with error `%s'\n", emsg);
6232       churn_ctx->num_failed_stop++;
6233     }
6234   else
6235     {
6236       churn_ctx->num_to_stop--;
6237     }
6238
6239 #if DEBUG_CHURN
6240   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6241       "Stopped peer, %d left.\n", churn_ctx->num_to_stop);
6242 #endif
6243   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
6244       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
6245
6246   if (total_left == 0)
6247     {
6248       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
6249         {
6250           GNUNET_asprintf (
6251                            &error_message,
6252                            "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
6253                            churn_ctx->num_failed_start,
6254                            churn_ctx->num_failed_stop);
6255         }
6256       churn_ctx->cb (churn_ctx->cb_cls, error_message);
6257       GNUNET_free_non_null (error_message);
6258       GNUNET_free (churn_ctx);
6259       GNUNET_free (shutdown_ctx);
6260     }
6261 }
6262
6263 /**
6264  * Count the number of running peers.
6265  *
6266  * @param pg handle for the peer group
6267  *
6268  * @return the number of currently running peers in the peer group
6269  */
6270 unsigned int
6271 GNUNET_TESTING_daemons_running(struct GNUNET_TESTING_PeerGroup *pg)
6272 {
6273   unsigned int i;
6274   unsigned int running = 0;
6275   for (i = 0; i < pg->total; i++)
6276     {
6277       if (pg->peers[i].daemon->running == GNUNET_YES)
6278         {
6279           GNUNET_assert (running != -1);
6280           running++;
6281         }
6282     }
6283   return running;
6284 }
6285
6286 /**
6287  * Task to rate limit the number of outstanding peer shutdown
6288  * requests.  This is necessary for making sure we don't do
6289  * too many ssh connections at once, but is generally nicer
6290  * to any system as well (graduated task starts, as opposed
6291  * to calling gnunet-arm N times all at once).
6292  */
6293 static void
6294 schedule_churn_shutdown_task(void *cls,
6295                              const struct GNUNET_SCHEDULER_TaskContext *tc)
6296 {
6297   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6298   struct ShutdownContext *shutdown_ctx;
6299   struct ChurnContext *churn_ctx;
6300   GNUNET_assert (peer_shutdown_ctx != NULL);
6301   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6302   GNUNET_assert (shutdown_ctx != NULL);
6303   churn_ctx = (struct ChurnContext *) shutdown_ctx->cb_cls;
6304   if (shutdown_ctx->outstanding > churn_ctx->pg->max_concurrent_ssh)
6305     GNUNET_SCHEDULER_add_delayed (
6306                                   GNUNET_TIME_relative_multiply (
6307                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
6308                                                                  100),
6309                                   &schedule_churn_shutdown_task,
6310                                   peer_shutdown_ctx);
6311   else
6312     {
6313       shutdown_ctx->outstanding++;
6314       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6315                                   shutdown_ctx->timeout, shutdown_ctx->cb,
6316                                   shutdown_ctx, GNUNET_NO, GNUNET_YES);
6317       GNUNET_free (peer_shutdown_ctx);
6318     }
6319 }
6320
6321
6322 /**
6323  * Simulate churn by stopping some peers (and possibly
6324  * re-starting others if churn is called multiple times).  This
6325  * function can only be used to create leave-join churn (peers "never"
6326  * leave for good).  First "voff" random peers that are currently
6327  * online will be taken offline; then "von" random peers that are then
6328  * offline will be put back online.  No notifications will be
6329  * generated for any of these operations except for the callback upon
6330  * completion.
6331  *
6332  * @param pg handle for the peer group
6333  * @param voff number of peers that should go offline
6334  * @param von number of peers that should come back online;
6335  *            must be zero on first call (since "testbed_start"
6336  *            always starts all of the peers)
6337  * @param timeout how long to wait for operations to finish before
6338  *        giving up
6339  * @param cb function to call at the end
6340  * @param cb_cls closure for cb
6341  */
6342 void
6343 GNUNET_TESTING_daemons_churn(struct GNUNET_TESTING_PeerGroup *pg,
6344                              unsigned int voff, unsigned int von,
6345                              struct GNUNET_TIME_Relative timeout,
6346                              GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6347 {
6348   struct ChurnContext *churn_ctx;
6349   struct ShutdownContext *shutdown_ctx;
6350   struct PeerShutdownContext *peer_shutdown_ctx;
6351   struct PeerRestartContext *peer_restart_ctx;
6352   struct ChurnRestartContext *churn_startup_ctx;
6353
6354   unsigned int running;
6355   unsigned int stopped;
6356   unsigned int total_running;
6357   unsigned int total_stopped;
6358   unsigned int i;
6359   unsigned int *running_arr;
6360   unsigned int *stopped_arr;
6361   unsigned int *running_permute;
6362   unsigned int *stopped_permute;
6363
6364   shutdown_ctx = NULL;
6365   peer_shutdown_ctx = NULL;
6366   peer_restart_ctx = NULL;
6367   churn_startup_ctx = NULL;
6368
6369   running = 0;
6370   stopped = 0;
6371
6372   if ((von == 0) && (voff == 0)) /* No peers at all? */
6373     {
6374       cb (cb_cls, NULL);
6375       return;
6376     }
6377
6378   for (i = 0; i < pg->total; i++)
6379     {
6380       if (pg->peers[i].daemon->running == GNUNET_YES)
6381         {
6382           GNUNET_assert (running != -1);
6383           running++;
6384         }
6385       else
6386         {
6387           GNUNET_assert (stopped != -1);
6388           stopped++;
6389         }
6390     }
6391
6392   if (voff > running)
6393     {
6394       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6395                   "Trying to stop more peers than are currently running!\n");
6396       cb (cb_cls, "Trying to stop more peers than are currently running!");
6397       return;
6398     }
6399
6400   if (von > stopped)
6401     {
6402       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6403                   "Trying to start more peers than are currently stopped!\n");
6404       cb (cb_cls, "Trying to start more peers than are currently stopped!");
6405       return;
6406     }
6407
6408   churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6409
6410   running_arr = NULL;
6411   if (running > 0)
6412     running_arr = GNUNET_malloc (running * sizeof (unsigned int));
6413
6414   stopped_arr = NULL;
6415   if (stopped > 0)
6416     stopped_arr = GNUNET_malloc (stopped * sizeof (unsigned int));
6417
6418   running_permute = NULL;
6419   stopped_permute = NULL;
6420
6421   if (running > 0)
6422     running_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6423                                                     running);
6424   if (stopped > 0)
6425     stopped_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6426                                                     stopped);
6427
6428   total_running = running;
6429   total_stopped = stopped;
6430   running = 0;
6431   stopped = 0;
6432
6433   churn_ctx->num_to_start = von;
6434   churn_ctx->num_to_stop = voff;
6435   churn_ctx->cb = cb;
6436   churn_ctx->cb_cls = cb_cls;
6437   churn_ctx->pg = pg;
6438
6439   for (i = 0; i < pg->total; i++)
6440     {
6441       if (pg->peers[i].daemon->running == GNUNET_YES)
6442         {
6443           GNUNET_assert ((running_arr != NULL) && (total_running > running));
6444           running_arr[running] = i;
6445           running++;
6446         }
6447       else
6448         {
6449           GNUNET_assert ((stopped_arr != NULL) && (total_stopped > stopped));
6450           stopped_arr[stopped] = i;
6451           stopped++;
6452         }
6453     }
6454
6455   GNUNET_assert (running >= voff);
6456   if (voff > 0)
6457     {
6458       shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6459       shutdown_ctx->cb = &churn_stop_callback;
6460       shutdown_ctx->cb_cls = churn_ctx;
6461       shutdown_ctx->total_peers = voff;
6462       shutdown_ctx->timeout = timeout;
6463     }
6464
6465   for (i = 0; i < voff; i++)
6466     {
6467 #if DEBUG_CHURN
6468       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Stopping peer %d!\n",
6469           running_permute[i]);
6470 #endif
6471       GNUNET_assert (running_arr != NULL);
6472       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6473       peer_shutdown_ctx->daemon
6474           = pg->peers[running_arr[running_permute[i]]].daemon;
6475       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6476       GNUNET_SCHEDULER_add_now (&schedule_churn_shutdown_task,
6477                                 peer_shutdown_ctx);
6478
6479       /*
6480        GNUNET_TESTING_daemon_stop (pg->peers[running_arr[running_permute[i]]].daemon,
6481        timeout,
6482        &churn_stop_callback, churn_ctx,
6483        GNUNET_NO, GNUNET_YES); */
6484     }
6485
6486   GNUNET_assert (stopped >= von);
6487   if (von > 0)
6488     {
6489       churn_startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6490       churn_startup_ctx->churn_ctx = churn_ctx;
6491       churn_startup_ctx->timeout = timeout;
6492       churn_startup_ctx->pg = pg;
6493     }
6494   for (i = 0; i < von; i++)
6495     {
6496 #if DEBUG_CHURN
6497       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Starting up peer %d!\n",
6498           stopped_permute[i]);
6499 #endif
6500       GNUNET_assert (stopped_arr != NULL);
6501       peer_restart_ctx = GNUNET_malloc (sizeof (struct PeerRestartContext));
6502       peer_restart_ctx->churn_restart_ctx = churn_startup_ctx;
6503       peer_restart_ctx->daemon
6504           = pg->peers[stopped_arr[stopped_permute[i]]].daemon;
6505       GNUNET_SCHEDULER_add_now (&schedule_churn_restart, peer_restart_ctx);
6506       /*
6507        GNUNET_TESTING_daemon_start_stopped(pg->peers[stopped_arr[stopped_permute[i]]].daemon,
6508        timeout, &churn_start_callback, churn_ctx); */
6509     }
6510
6511   GNUNET_free_non_null (running_arr);
6512   GNUNET_free_non_null (stopped_arr);
6513   GNUNET_free_non_null (running_permute);
6514   GNUNET_free_non_null (stopped_permute);
6515 }
6516
6517
6518 /**
6519  * Restart all peers in the given group.
6520  *
6521  * @param pg the handle to the peer group
6522  * @param callback function to call on completion (or failure)
6523  * @param callback_cls closure for the callback function
6524  */
6525 void
6526 GNUNET_TESTING_daemons_restart(struct GNUNET_TESTING_PeerGroup *pg,
6527                                GNUNET_TESTING_NotifyCompletion callback,
6528                                void *callback_cls)
6529 {
6530   struct RestartContext *restart_context;
6531   unsigned int off;
6532
6533   if (pg->total > 0)
6534     {
6535       restart_context = GNUNET_malloc (sizeof (struct RestartContext));
6536       restart_context->peer_group = pg;
6537       restart_context->peers_restarted = 0;
6538       restart_context->callback = callback;
6539       restart_context->callback_cls = callback_cls;
6540
6541       for (off = 0; off < pg->total; off++)
6542         {
6543           GNUNET_TESTING_daemon_restart (pg->peers[off].daemon,
6544                                          &restart_callback, restart_context);
6545         }
6546     }
6547 }
6548
6549
6550 /**
6551  * Start or stop an individual peer from the given group.
6552  *
6553  * @param pg handle to the peer group
6554  * @param offset which peer to start or stop
6555  * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
6556  * @param timeout how long to wait for shutdown
6557  * @param cb function to call at the end
6558  * @param cb_cls closure for cb
6559  */
6560 void
6561 GNUNET_TESTING_daemons_vary(struct GNUNET_TESTING_PeerGroup *pg,
6562                             unsigned int offset, int desired_status,
6563                             struct GNUNET_TIME_Relative timeout,
6564                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6565 {
6566   struct ShutdownContext *shutdown_ctx;
6567   struct ChurnRestartContext *startup_ctx;
6568   struct ChurnContext *churn_ctx;
6569
6570   if (GNUNET_NO == desired_status)
6571     {
6572       if (NULL != pg->peers[offset].daemon)
6573         {
6574           shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6575           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6576           churn_ctx->num_to_start = 0;
6577           churn_ctx->num_to_stop = 1;
6578           churn_ctx->cb = cb;
6579           churn_ctx->cb_cls = cb_cls;
6580           shutdown_ctx->cb_cls = churn_ctx;
6581           GNUNET_TESTING_daemon_stop (pg->peers[offset].daemon, timeout,
6582                                       &churn_stop_callback, shutdown_ctx,
6583                                       GNUNET_NO, GNUNET_YES);
6584         }
6585     }
6586   else if (GNUNET_YES == desired_status)
6587     {
6588       if (NULL == pg->peers[offset].daemon)
6589         {
6590           startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6591           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6592           churn_ctx->num_to_start = 1;
6593           churn_ctx->num_to_stop = 0;
6594           churn_ctx->cb = cb;
6595           churn_ctx->cb_cls = cb_cls;
6596           startup_ctx->churn_ctx = churn_ctx;
6597           GNUNET_TESTING_daemon_start_stopped (pg->peers[offset].daemon,
6598                                                timeout, &churn_start_callback,
6599                                                startup_ctx);
6600         }
6601     }
6602   else
6603     GNUNET_break (0);
6604 }
6605
6606
6607 /**
6608  * Callback for shutting down peers in a peer group.
6609  *
6610  * @param cls closure (struct ShutdownContext)
6611  * @param emsg NULL on success
6612  */
6613 static void
6614 internal_shutdown_callback(void *cls, const char *emsg)
6615 {
6616   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6617   struct ShutdownContext *shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6618   unsigned int off;
6619   struct OutstandingSSH *ssh_pos;
6620
6621   shutdown_ctx->outstanding--;
6622   if (peer_shutdown_ctx->daemon->hostname != NULL)
6623     decrement_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6624                                    shutdown_ctx->pg);
6625
6626   if (emsg == NULL)
6627     {
6628       shutdown_ctx->peers_down++;
6629     }
6630   else
6631     {
6632       shutdown_ctx->peers_failed++;
6633     }
6634
6635   if ((shutdown_ctx->cb != NULL) && (shutdown_ctx->peers_down
6636       + shutdown_ctx->peers_failed == shutdown_ctx->total_peers))
6637     {
6638       if (shutdown_ctx->peers_failed > 0)
6639         shutdown_ctx->cb (shutdown_ctx->cb_cls,
6640                           "Not all peers successfully shut down!");
6641       else
6642         shutdown_ctx->cb (shutdown_ctx->cb_cls, NULL);
6643
6644       GNUNET_free (shutdown_ctx->pg->peers);
6645       GNUNET_free_non_null(shutdown_ctx->pg->hostkey_data);
6646       for (off = 0; off < shutdown_ctx->pg->num_hosts; off++)
6647         {
6648           GNUNET_free (shutdown_ctx->pg->hosts[off].hostname);
6649           GNUNET_free_non_null (shutdown_ctx->pg->hosts[off].username);
6650         }
6651       GNUNET_free_non_null (shutdown_ctx->pg->hosts);
6652       while (NULL != (ssh_pos = shutdown_ctx->pg->ssh_head))
6653         {
6654           GNUNET_CONTAINER_DLL_remove(shutdown_ctx->pg->ssh_head, shutdown_ctx->pg->ssh_tail, ssh_pos);
6655           GNUNET_free(ssh_pos);
6656         }
6657       GNUNET_free (shutdown_ctx->pg);
6658       GNUNET_free (shutdown_ctx);
6659     }
6660   GNUNET_free(peer_shutdown_ctx);
6661 }
6662
6663
6664 /**
6665  * Task to rate limit the number of outstanding peer shutdown
6666  * requests.  This is necessary for making sure we don't do
6667  * too many ssh connections at once, but is generally nicer
6668  * to any system as well (graduated task starts, as opposed
6669  * to calling gnunet-arm N times all at once).
6670  */
6671 static void
6672 schedule_shutdown_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6673 {
6674   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6675   struct ShutdownContext *shutdown_ctx;
6676
6677   GNUNET_assert (peer_shutdown_ctx != NULL);
6678   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6679   GNUNET_assert (shutdown_ctx != NULL);
6680
6681   if ((shutdown_ctx->outstanding < shutdown_ctx->pg->max_concurrent_ssh)
6682       || ((peer_shutdown_ctx->daemon->hostname != NULL)
6683           && (count_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6684                                          shutdown_ctx->pg)
6685               < shutdown_ctx->pg->max_concurrent_ssh)))
6686     {
6687       if (peer_shutdown_ctx->daemon->hostname != NULL)
6688         increment_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6689                                        shutdown_ctx->pg);
6690       shutdown_ctx->outstanding++;
6691       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6692                                   shutdown_ctx->timeout,
6693                                   &internal_shutdown_callback, peer_shutdown_ctx,
6694                                   GNUNET_YES, GNUNET_NO);
6695     }
6696   else
6697     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
6698                                                                  100),
6699                                   &schedule_shutdown_task, peer_shutdown_ctx);
6700
6701 }
6702
6703
6704 /**
6705  * Shutdown all peers started in the given group.
6706  *
6707  * @param pg handle to the peer group
6708  * @param timeout how long to wait for shutdown
6709  * @param cb callback to notify upon success or failure
6710  * @param cb_cls closure for cb
6711  */
6712 void
6713 GNUNET_TESTING_daemons_stop(struct GNUNET_TESTING_PeerGroup *pg,
6714                             struct GNUNET_TIME_Relative timeout,
6715                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6716 {
6717   unsigned int off;
6718   struct ShutdownContext *shutdown_ctx;
6719   struct PeerShutdownContext *peer_shutdown_ctx;
6720 #if OLD
6721   struct PeerConnection *conn_iter;
6722   struct PeerConnection *temp_conn;
6723 #endif
6724
6725   GNUNET_assert (pg->total > 0);
6726
6727   shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6728   shutdown_ctx->cb = cb;
6729   shutdown_ctx->cb_cls = cb_cls;
6730   shutdown_ctx->total_peers = pg->total;
6731   shutdown_ctx->timeout = timeout;
6732   shutdown_ctx->pg = pg;
6733   /* shtudown_ctx->outstanding = 0; */
6734
6735   for (off = 0; off < pg->total; off++)
6736     {
6737       GNUNET_assert (NULL != pg->peers[off].daemon);
6738       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6739       peer_shutdown_ctx->daemon = pg->peers[off].daemon;
6740       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6741       GNUNET_SCHEDULER_add_now (&schedule_shutdown_task, peer_shutdown_ctx);
6742
6743       if (NULL != pg->peers[off].cfg)
6744       {
6745         GNUNET_CONFIGURATION_destroy (pg->peers[off].cfg);
6746         pg->peers[off].cfg = NULL;
6747       }
6748 #if OLD
6749       conn_iter = pg->peers[off].allowed_peers_head;
6750       while (conn_iter != NULL)
6751         {
6752           temp_conn = conn_iter->next;
6753           GNUNET_free(conn_iter);
6754           conn_iter = temp_conn;
6755         }
6756
6757       conn_iter = pg->peers[off].connect_peers_head;
6758       while (conn_iter != NULL)
6759         {
6760           temp_conn = conn_iter->next;
6761           GNUNET_free(conn_iter);
6762           conn_iter = temp_conn;
6763         }
6764
6765       conn_iter = pg->peers[off].blacklisted_peers_head;
6766       while (conn_iter != NULL)
6767         {
6768           temp_conn = conn_iter->next;
6769           GNUNET_free(conn_iter);
6770           conn_iter = temp_conn;
6771         }
6772
6773       conn_iter = pg->peers[off].connect_peers_working_set_head;
6774       while (conn_iter != NULL)
6775         {
6776           temp_conn = conn_iter->next;
6777           GNUNET_free(conn_iter);
6778           conn_iter = temp_conn;
6779         }
6780 #else
6781       if (pg->peers[off].allowed_peers != NULL)
6782         GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].allowed_peers);
6783       if (pg->peers[off].connect_peers != NULL)
6784         GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].connect_peers);
6785       if (pg->peers[off].blacklisted_peers != NULL)
6786         GNUNET_CONTAINER_multihashmap_destroy (pg->
6787                                                peers[off].blacklisted_peers);
6788 #endif
6789     }
6790 }
6791
6792 /* end of testing_group.c */